s3: Remove some else{} branches in smbd_calculate_maximum_allowed_access
[kai/samba.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 "system/filesys.h"
24 #include "printing.h"
25 #include "smbd/smbd.h"
26 #include "smbd/globals.h"
27 #include "fake_file.h"
28 #include "../libcli/security/security.h"
29 #include "../librpc/gen_ndr/ndr_security.h"
30 #include "../librpc/gen_ndr/open_files.h"
31 #include "auth.h"
32 #include "messages.h"
33
34 extern const struct generic_mapping file_generic_mapping;
35
36 struct deferred_open_record {
37         bool delayed_for_oplocks;
38         struct file_id id;
39 };
40
41 /****************************************************************************
42  If the requester wanted DELETE_ACCESS and was rejected because
43  the file ACL didn't include DELETE_ACCESS, see if the parent ACL
44  ovverrides this.
45 ****************************************************************************/
46
47 static bool parent_override_delete(connection_struct *conn,
48                                         const struct smb_filename *smb_fname,
49                                         uint32_t access_mask,
50                                         uint32_t rejected_mask)
51 {
52         if ((access_mask & DELETE_ACCESS) &&
53                     (rejected_mask & DELETE_ACCESS) &&
54                     can_delete_file_in_directory(conn, smb_fname)) {
55                 return true;
56         }
57         return false;
58 }
59
60 /****************************************************************************
61  Check if we have open rights.
62 ****************************************************************************/
63
64 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
65                                 const struct smb_filename *smb_fname,
66                                 uint32_t access_mask)
67 {
68         /* Check if we have rights to open. */
69         NTSTATUS status;
70         struct security_descriptor *sd = NULL;
71         uint32_t rejected_share_access;
72         uint32_t rejected_mask = access_mask;
73
74         rejected_share_access = access_mask & ~(conn->share_access);
75
76         if (rejected_share_access) {
77                 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
78                         "on %s (0x%x)\n",
79                         (unsigned int)access_mask,
80                         smb_fname_str_dbg(smb_fname),
81                         (unsigned int)rejected_share_access ));
82                 return NT_STATUS_ACCESS_DENIED;
83         }
84
85         if (get_current_uid(conn) == (uid_t)0) {
86                 /* I'm sorry sir, I didn't know you were root... */
87                 DEBUG(10,("smbd_check_access_rights: root override "
88                         "on %s. Granting 0x%x\n",
89                         smb_fname_str_dbg(smb_fname),
90                         (unsigned int)access_mask ));
91                 return NT_STATUS_OK;
92         }
93
94         if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
95                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
96                         "on DELETE_ACCESS on file %s. Granting 0x%x\n",
97                         smb_fname_str_dbg(smb_fname),
98                         (unsigned int)access_mask ));
99                 return NT_STATUS_OK;
100         }
101
102         if (access_mask == DELETE_ACCESS &&
103                         VALID_STAT(smb_fname->st) &&
104                         S_ISLNK(smb_fname->st.st_ex_mode)) {
105                 /* We can always delete a symlink. */
106                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
107                         "on DELETE_ACCESS on symlink %s.\n",
108                         smb_fname_str_dbg(smb_fname) ));
109                 return NT_STATUS_OK;
110         }
111
112         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
113                         (SECINFO_OWNER |
114                         SECINFO_GROUP |
115                         SECINFO_DACL),&sd);
116
117         if (!NT_STATUS_IS_OK(status)) {
118                 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
119                         "on %s: %s\n",
120                         smb_fname_str_dbg(smb_fname),
121                         nt_errstr(status)));
122
123                 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
124                         goto access_denied;
125                 }
126
127                 return status;
128         }
129
130         /*
131          * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
132          * owner WRITE_DAC and READ_CONTROL.
133          */
134         status = se_access_check(sd,
135                                 get_current_nttok(conn),
136                                 (access_mask & ~FILE_READ_ATTRIBUTES),
137                                 &rejected_mask);
138
139         DEBUG(10,("smbd_check_access_rights: file %s requesting "
140                 "0x%x returning 0x%x (%s)\n",
141                 smb_fname_str_dbg(smb_fname),
142                 (unsigned int)access_mask,
143                 (unsigned int)rejected_mask,
144                 nt_errstr(status) ));
145
146         if (!NT_STATUS_IS_OK(status)) {
147                 if (DEBUGLEVEL >= 10) {
148                         DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
149                                 smb_fname_str_dbg(smb_fname) ));
150                         NDR_PRINT_DEBUG(security_descriptor, sd);
151                 }
152         }
153
154         TALLOC_FREE(sd);
155
156         if (NT_STATUS_IS_OK(status) ||
157                         !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
158                 return status;
159         }
160
161         /* Here we know status == NT_STATUS_ACCESS_DENIED. */
162
163   access_denied:
164
165         if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
166                         (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
167                         (lp_map_readonly(SNUM(conn)) ||
168                         lp_map_archive(SNUM(conn)) ||
169                         lp_map_hidden(SNUM(conn)) ||
170                         lp_map_system(SNUM(conn)))) {
171                 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
172
173                 DEBUG(10,("smbd_check_access_rights: "
174                         "overrode "
175                         "FILE_WRITE_ATTRIBUTES "
176                         "on file %s\n",
177                         smb_fname_str_dbg(smb_fname)));
178         }
179
180         if (parent_override_delete(conn,
181                                 smb_fname,
182                                 access_mask,
183                                 rejected_mask)) {
184                 /* Were we trying to do an open
185                  * for delete and didn't get DELETE
186                  * access (only) ? Check if the
187                  * directory allows DELETE_CHILD.
188                  * See here:
189                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
190                  * for details. */
191
192                 rejected_mask &= ~DELETE_ACCESS;
193
194                 DEBUG(10,("smbd_check_access_rights: "
195                         "overrode "
196                         "DELETE_ACCESS on "
197                         "file %s\n",
198                         smb_fname_str_dbg(smb_fname)));
199         }
200
201         if (rejected_mask != 0) {
202                 return NT_STATUS_ACCESS_DENIED;
203         } else {
204                 return NT_STATUS_OK;
205         }
206 }
207
208 static NTSTATUS check_parent_access(struct connection_struct *conn,
209                                 struct smb_filename *smb_fname,
210                                 uint32_t access_mask,
211                                 char **pp_parent_dir)
212 {
213         NTSTATUS status;
214         char *parent_dir = NULL;
215         struct security_descriptor *parent_sd = NULL;
216         uint32_t access_granted = 0;
217
218         if (!parent_dirname(talloc_tos(),
219                                 smb_fname->base_name,
220                                 &parent_dir,
221                                 NULL)) {
222                 return NT_STATUS_NO_MEMORY;
223         }
224
225         if (pp_parent_dir) {
226                 *pp_parent_dir = parent_dir;
227         }
228
229         if (get_current_uid(conn) == (uid_t)0) {
230                 /* I'm sorry sir, I didn't know you were root... */
231                 DEBUG(10,("check_parent_access: root override "
232                         "on %s. Granting 0x%x\n",
233                         smb_fname_str_dbg(smb_fname),
234                         (unsigned int)access_mask ));
235                 return NT_STATUS_OK;
236         }
237
238         status = SMB_VFS_GET_NT_ACL(conn,
239                                 parent_dir,
240                                 SECINFO_DACL,
241                                 &parent_sd);
242
243         if (!NT_STATUS_IS_OK(status)) {
244                 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
245                         "%s with error %s\n",
246                         parent_dir,
247                         nt_errstr(status)));
248                 return status;
249         }
250
251         /*
252          * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
253          * owner WRITE_DAC and READ_CONTROL.
254          */
255         status = se_access_check(parent_sd,
256                                 get_current_nttok(conn),
257                                 (access_mask & ~FILE_READ_ATTRIBUTES),
258                                 &access_granted);
259         if(!NT_STATUS_IS_OK(status)) {
260                 DEBUG(5,("check_parent_access: access check "
261                         "on directory %s for "
262                         "path %s for mask 0x%x returned (0x%x) %s\n",
263                         parent_dir,
264                         smb_fname->base_name,
265                         access_mask,
266                         access_granted,
267                         nt_errstr(status) ));
268                 return status;
269         }
270
271         return NT_STATUS_OK;
272 }
273
274 /****************************************************************************
275  fd support routines - attempt to do a dos_open.
276 ****************************************************************************/
277
278 static NTSTATUS fd_open(struct connection_struct *conn,
279                     files_struct *fsp,
280                     int flags,
281                     mode_t mode)
282 {
283         struct smb_filename *smb_fname = fsp->fsp_name;
284         NTSTATUS status = NT_STATUS_OK;
285
286 #ifdef O_NOFOLLOW
287         /* 
288          * Never follow symlinks on a POSIX client. The
289          * client should be doing this.
290          */
291
292         if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
293                 flags |= O_NOFOLLOW;
294         }
295 #endif
296
297         fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
298         if (fsp->fh->fd == -1) {
299                 status = map_nt_error_from_unix(errno);
300                 if (errno == EMFILE) {
301                         static time_t last_warned = 0L;
302
303                         if (time((time_t *) NULL) > last_warned) {
304                                 DEBUG(0,("Too many open files, unable "
305                                         "to open more!  smbd's max "
306                                         "open files = %d\n",
307                                         lp_max_open_files()));
308                                 last_warned = time((time_t *) NULL);
309                         }
310                 }
311
312         }
313
314         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
315                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
316                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
317
318         return status;
319 }
320
321 /****************************************************************************
322  Close the file associated with a fsp.
323 ****************************************************************************/
324
325 NTSTATUS fd_close(files_struct *fsp)
326 {
327         int ret;
328
329         if (fsp->dptr) {
330                 dptr_CloseDir(fsp);
331         }
332         if (fsp->fh->fd == -1) {
333                 return NT_STATUS_OK; /* What we used to call a stat open. */
334         }
335         if (fsp->fh->ref_count > 1) {
336                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
337         }
338
339         ret = SMB_VFS_CLOSE(fsp);
340         fsp->fh->fd = -1;
341         if (ret == -1) {
342                 return map_nt_error_from_unix(errno);
343         }
344         return NT_STATUS_OK;
345 }
346
347 /****************************************************************************
348  Change the ownership of a file to that of the parent directory.
349  Do this by fd if possible.
350 ****************************************************************************/
351
352 void change_file_owner_to_parent(connection_struct *conn,
353                                         const char *inherit_from_dir,
354                                         files_struct *fsp)
355 {
356         struct smb_filename *smb_fname_parent = NULL;
357         NTSTATUS status;
358         int ret;
359
360         status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
361                                             NULL, NULL, &smb_fname_parent);
362         if (!NT_STATUS_IS_OK(status)) {
363                 return;
364         }
365
366         ret = SMB_VFS_STAT(conn, smb_fname_parent);
367         if (ret == -1) {
368                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
369                          "directory %s. Error was %s\n",
370                          smb_fname_str_dbg(smb_fname_parent),
371                          strerror(errno)));
372                 TALLOC_FREE(smb_fname_parent);
373                 return;
374         }
375
376         if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
377                 /* Already this uid - no need to change. */
378                 DEBUG(10,("change_file_owner_to_parent: file %s "
379                         "is already owned by uid %d\n",
380                         fsp_str_dbg(fsp),
381                         (int)fsp->fsp_name->st.st_ex_uid ));
382                 TALLOC_FREE(smb_fname_parent);
383                 return;
384         }
385
386         become_root();
387         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
388         unbecome_root();
389         if (ret == -1) {
390                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
391                          "file %s to parent directory uid %u. Error "
392                          "was %s\n", fsp_str_dbg(fsp),
393                          (unsigned int)smb_fname_parent->st.st_ex_uid,
394                          strerror(errno) ));
395         } else {
396                 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
397                         "parent directory uid %u.\n", fsp_str_dbg(fsp),
398                         (unsigned int)smb_fname_parent->st.st_ex_uid));
399                 /* Ensure the uid entry is updated. */
400                 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
401         }
402
403         TALLOC_FREE(smb_fname_parent);
404 }
405
406 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
407                                        const char *inherit_from_dir,
408                                        const char *fname,
409                                        SMB_STRUCT_STAT *psbuf)
410 {
411         struct smb_filename *smb_fname_parent = NULL;
412         struct smb_filename *smb_fname_cwd = NULL;
413         char *saved_dir = NULL;
414         TALLOC_CTX *ctx = talloc_tos();
415         NTSTATUS status = NT_STATUS_OK;
416         int ret;
417
418         status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
419                                             &smb_fname_parent);
420         if (!NT_STATUS_IS_OK(status)) {
421                 return status;
422         }
423
424         ret = SMB_VFS_STAT(conn, smb_fname_parent);
425         if (ret == -1) {
426                 status = map_nt_error_from_unix(errno);
427                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
428                          "directory %s. Error was %s\n",
429                          smb_fname_str_dbg(smb_fname_parent),
430                          strerror(errno)));
431                 goto out;
432         }
433
434         /* We've already done an lstat into psbuf, and we know it's a
435            directory. If we can cd into the directory and the dev/ino
436            are the same then we can safely chown without races as
437            we're locking the directory in place by being in it.  This
438            should work on any UNIX (thanks tridge :-). JRA.
439         */
440
441         saved_dir = vfs_GetWd(ctx,conn);
442         if (!saved_dir) {
443                 status = map_nt_error_from_unix(errno);
444                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
445                          "current working directory. Error was %s\n",
446                          strerror(errno)));
447                 goto out;
448         }
449
450         /* Chdir into the new path. */
451         if (vfs_ChDir(conn, fname) == -1) {
452                 status = map_nt_error_from_unix(errno);
453                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
454                          "current working directory to %s. Error "
455                          "was %s\n", fname, strerror(errno) ));
456                 goto chdir;
457         }
458
459         status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
460                                             &smb_fname_cwd);
461         if (!NT_STATUS_IS_OK(status)) {
462                 return status;
463         }
464
465         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
466         if (ret == -1) {
467                 status = map_nt_error_from_unix(errno);
468                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
469                          "directory '.' (%s) Error was %s\n",
470                          fname, strerror(errno)));
471                 goto chdir;
472         }
473
474         /* Ensure we're pointing at the same place. */
475         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
476             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
477                 DEBUG(0,("change_dir_owner_to_parent: "
478                          "device/inode on directory %s changed. "
479                          "Refusing to chown !\n", fname ));
480                 status = NT_STATUS_ACCESS_DENIED;
481                 goto chdir;
482         }
483
484         if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
485                 /* Already this uid - no need to change. */
486                 DEBUG(10,("change_dir_owner_to_parent: directory %s "
487                         "is already owned by uid %d\n",
488                         fname,
489                         (int)smb_fname_cwd->st.st_ex_uid ));
490                 status = NT_STATUS_OK;
491                 goto chdir;
492         }
493
494         become_root();
495         ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
496                             (gid_t)-1);
497         unbecome_root();
498         if (ret == -1) {
499                 status = map_nt_error_from_unix(errno);
500                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
501                           "directory %s to parent directory uid %u. "
502                           "Error was %s\n", fname,
503                           (unsigned int)smb_fname_parent->st.st_ex_uid,
504                           strerror(errno) ));
505         } else {
506                 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
507                         "directory %s to parent directory uid %u.\n",
508                         fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
509                 /* Ensure the uid entry is updated. */
510                 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
511         }
512
513  chdir:
514         vfs_ChDir(conn,saved_dir);
515  out:
516         TALLOC_FREE(smb_fname_parent);
517         TALLOC_FREE(smb_fname_cwd);
518         return status;
519 }
520
521 /****************************************************************************
522  Open a file.
523 ****************************************************************************/
524
525 static NTSTATUS open_file(files_struct *fsp,
526                           connection_struct *conn,
527                           struct smb_request *req,
528                           const char *parent_dir,
529                           int flags,
530                           mode_t unx_mode,
531                           uint32 access_mask, /* client requested access mask. */
532                           uint32 open_access_mask) /* what we're actually using in the open. */
533 {
534         struct smb_filename *smb_fname = fsp->fsp_name;
535         NTSTATUS status = NT_STATUS_OK;
536         int accmode = (flags & O_ACCMODE);
537         int local_flags = flags;
538         bool file_existed = VALID_STAT(fsp->fsp_name->st);
539         bool file_created = false;
540
541         fsp->fh->fd = -1;
542         errno = EPERM;
543
544         /* Check permissions */
545
546         /*
547          * This code was changed after seeing a client open request 
548          * containing the open mode of (DENY_WRITE/read-only) with
549          * the 'create if not exist' bit set. The previous code
550          * would fail to open the file read only on a read-only share
551          * as it was checking the flags parameter  directly against O_RDONLY,
552          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
553          * JRA.
554          */
555
556         if (!CAN_WRITE(conn)) {
557                 /* It's a read-only share - fail if we wanted to write. */
558                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
559                         DEBUG(3,("Permission denied opening %s\n",
560                                  smb_fname_str_dbg(smb_fname)));
561                         return NT_STATUS_ACCESS_DENIED;
562                 } else if(flags & O_CREAT) {
563                         /* We don't want to write - but we must make sure that
564                            O_CREAT doesn't create the file if we have write
565                            access into the directory.
566                         */
567                         flags &= ~(O_CREAT|O_EXCL);
568                         local_flags &= ~(O_CREAT|O_EXCL);
569                 }
570         }
571
572         /*
573          * This little piece of insanity is inspired by the
574          * fact that an NT client can open a file for O_RDONLY,
575          * but set the create disposition to FILE_EXISTS_TRUNCATE.
576          * If the client *can* write to the file, then it expects to
577          * truncate the file, even though it is opening for readonly.
578          * Quicken uses this stupid trick in backup file creation...
579          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
580          * for helping track this one down. It didn't bite us in 2.0.x
581          * as we always opened files read-write in that release. JRA.
582          */
583
584         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
585                 DEBUG(10,("open_file: truncate requested on read-only open "
586                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
587                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
588         }
589
590         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
591             (!file_existed && (local_flags & O_CREAT)) ||
592             ((local_flags & O_TRUNC) == O_TRUNC) ) {
593                 const char *wild;
594
595                 /*
596                  * We can't actually truncate here as the file may be locked.
597                  * open_file_ntcreate will take care of the truncate later. JRA.
598                  */
599
600                 local_flags &= ~O_TRUNC;
601
602 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
603                 /*
604                  * We would block on opening a FIFO with no one else on the
605                  * other end. Do what we used to do and add O_NONBLOCK to the
606                  * open flags. JRA.
607                  */
608
609                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
610                         local_flags |= O_NONBLOCK;
611                 }
612 #endif
613
614                 /* Don't create files with Microsoft wildcard characters. */
615                 if (fsp->base_fsp) {
616                         /*
617                          * wildcard characters are allowed in stream names
618                          * only test the basefilename
619                          */
620                         wild = fsp->base_fsp->fsp_name->base_name;
621                 } else {
622                         wild = smb_fname->base_name;
623                 }
624                 if ((local_flags & O_CREAT) && !file_existed &&
625                     ms_has_wild(wild))  {
626                         return NT_STATUS_OBJECT_NAME_INVALID;
627                 }
628
629                 /* Can we access this file ? */
630                 if (!fsp->base_fsp) {
631                         /* Only do this check on non-stream open. */
632                         if (file_existed) {
633                                 status = smbd_check_access_rights(conn,
634                                                 smb_fname,
635                                                 access_mask);
636                         } else if (local_flags & O_CREAT){
637                                 status = check_parent_access(conn,
638                                                 smb_fname,
639                                                 SEC_DIR_ADD_FILE,
640                                                 NULL);
641                         } else {
642                                 /* File didn't exist and no O_CREAT. */
643                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
644                         }
645                         if (!NT_STATUS_IS_OK(status)) {
646                                 DEBUG(10,("open_file: "
647                                         "%s on file "
648                                         "%s returned %s\n",
649                                         file_existed ?
650                                                 "smbd_check_access_rights" :
651                                                 "check_parent_access",
652                                         smb_fname_str_dbg(smb_fname),
653                                         nt_errstr(status) ));
654                                 return status;
655                         }
656                 }
657
658                 /* Actually do the open */
659                 status = fd_open(conn, fsp, local_flags, unx_mode);
660                 if (!NT_STATUS_IS_OK(status)) {
661                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
662                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
663                                  nt_errstr(status),local_flags,flags));
664                         return status;
665                 }
666
667                 if ((local_flags & O_CREAT) && !file_existed) {
668                         file_created = true;
669                 }
670
671         } else {
672                 fsp->fh->fd = -1; /* What we used to call a stat open. */
673                 if (!file_existed) {
674                         /* File must exist for a stat open. */
675                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
676                 }
677
678                 status = smbd_check_access_rights(conn,
679                                 smb_fname,
680                                 access_mask);
681
682                 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
683                                 fsp->posix_open &&
684                                 S_ISLNK(smb_fname->st.st_ex_mode)) {
685                         /* This is a POSIX stat open for delete
686                          * or rename on a symlink that points
687                          * nowhere. Allow. */
688                         DEBUG(10,("open_file: allowing POSIX "
689                                   "open on bad symlink %s\n",
690                                   smb_fname_str_dbg(smb_fname)));
691                         status = NT_STATUS_OK;
692                 }
693
694                 if (!NT_STATUS_IS_OK(status)) {
695                         DEBUG(10,("open_file: "
696                                 "smbd_check_access_rights on file "
697                                 "%s returned %s\n",
698                                 smb_fname_str_dbg(smb_fname),
699                                 nt_errstr(status) ));
700                         return status;
701                 }
702         }
703
704         if (!file_existed) {
705                 int ret;
706
707                 if (fsp->fh->fd == -1) {
708                         ret = SMB_VFS_STAT(conn, smb_fname);
709                 } else {
710                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
711                         /* If we have an fd, this stat should succeed. */
712                         if (ret == -1) {
713                                 DEBUG(0,("Error doing fstat on open file %s "
714                                          "(%s)\n",
715                                          smb_fname_str_dbg(smb_fname),
716                                          strerror(errno) ));
717                         }
718                 }
719
720                 /* For a non-io open, this stat failing means file not found. JRA */
721                 if (ret == -1) {
722                         status = map_nt_error_from_unix(errno);
723                         fd_close(fsp);
724                         return status;
725                 }
726
727                 if (file_created) {
728                         bool need_re_stat = false;
729                         /* Do all inheritance work after we've
730                            done a successful stat call and filled
731                            in the stat struct in fsp->fsp_name. */
732
733                         /* Inherit the ACL if required */
734                         if (lp_inherit_perms(SNUM(conn))) {
735                                 inherit_access_posix_acl(conn, parent_dir,
736                                                          smb_fname->base_name,
737                                                          unx_mode);
738                                 need_re_stat = true;
739                         }
740
741                         /* Change the owner if required. */
742                         if (lp_inherit_owner(SNUM(conn))) {
743                                 change_file_owner_to_parent(conn, parent_dir,
744                                                             fsp);
745                                 need_re_stat = true;
746                         }
747
748                         if (need_re_stat) {
749                                 if (fsp->fh->fd == -1) {
750                                         ret = SMB_VFS_STAT(conn, smb_fname);
751                                 } else {
752                                         ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
753                                         /* If we have an fd, this stat should succeed. */
754                                         if (ret == -1) {
755                                                 DEBUG(0,("Error doing fstat on open file %s "
756                                                          "(%s)\n",
757                                                          smb_fname_str_dbg(smb_fname),
758                                                          strerror(errno) ));
759                                         }
760                                 }
761                         }
762
763                         notify_fname(conn, NOTIFY_ACTION_ADDED,
764                                      FILE_NOTIFY_CHANGE_FILE_NAME,
765                                      smb_fname->base_name);
766                 }
767         }
768
769         /*
770          * POSIX allows read-only opens of directories. We don't
771          * want to do this (we use a different code path for this)
772          * so catch a directory open and return an EISDIR. JRA.
773          */
774
775         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
776                 fd_close(fsp);
777                 errno = EISDIR;
778                 return NT_STATUS_FILE_IS_A_DIRECTORY;
779         }
780
781         fsp->mode = smb_fname->st.st_ex_mode;
782         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
783         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
784         fsp->file_pid = req ? req->smbpid : 0;
785         fsp->can_lock = True;
786         fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
787         if (!CAN_WRITE(conn)) {
788                 fsp->can_write = False;
789         } else {
790                 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
791                         True : False;
792         }
793         fsp->print_file = NULL;
794         fsp->modified = False;
795         fsp->sent_oplock_break = NO_BREAK_SENT;
796         fsp->is_directory = False;
797         if (conn->aio_write_behind_list &&
798             is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
799                        conn->case_sensitive)) {
800                 fsp->aio_write_behind = True;
801         }
802
803         fsp->wcp = NULL; /* Write cache pointer. */
804
805         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
806                  conn->session_info->unix_info->unix_name,
807                  smb_fname_str_dbg(smb_fname),
808                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
809                  conn->num_files_open));
810
811         errno = 0;
812         return NT_STATUS_OK;
813 }
814
815 /****************************************************************************
816  Check if we can open a file with a share mode.
817  Returns True if conflict, False if not.
818 ****************************************************************************/
819
820 static bool share_conflict(struct share_mode_entry *entry,
821                            uint32 access_mask,
822                            uint32 share_access)
823 {
824         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
825                   "entry->share_access = 0x%x, "
826                   "entry->private_options = 0x%x\n",
827                   (unsigned int)entry->access_mask,
828                   (unsigned int)entry->share_access,
829                   (unsigned int)entry->private_options));
830
831         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
832                   (unsigned int)access_mask, (unsigned int)share_access));
833
834         if ((entry->access_mask & (FILE_WRITE_DATA|
835                                    FILE_APPEND_DATA|
836                                    FILE_READ_DATA|
837                                    FILE_EXECUTE|
838                                    DELETE_ACCESS)) == 0) {
839                 DEBUG(10,("share_conflict: No conflict due to "
840                           "entry->access_mask = 0x%x\n",
841                           (unsigned int)entry->access_mask ));
842                 return False;
843         }
844
845         if ((access_mask & (FILE_WRITE_DATA|
846                             FILE_APPEND_DATA|
847                             FILE_READ_DATA|
848                             FILE_EXECUTE|
849                             DELETE_ACCESS)) == 0) {
850                 DEBUG(10,("share_conflict: No conflict due to "
851                           "access_mask = 0x%x\n",
852                           (unsigned int)access_mask ));
853                 return False;
854         }
855
856 #if 1 /* JRA TEST - Superdebug. */
857 #define CHECK_MASK(num, am, right, sa, share) \
858         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
859                 (unsigned int)(num), (unsigned int)(am), \
860                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
861         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
862                 (unsigned int)(num), (unsigned int)(sa), \
863                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
864         if (((am) & (right)) && !((sa) & (share))) { \
865                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
866 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
867                         (unsigned int)(share) )); \
868                 return True; \
869         }
870 #else
871 #define CHECK_MASK(num, am, right, sa, share) \
872         if (((am) & (right)) && !((sa) & (share))) { \
873                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
874 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
875                         (unsigned int)(share) )); \
876                 return True; \
877         }
878 #endif
879
880         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
881                    share_access, FILE_SHARE_WRITE);
882         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
883                    entry->share_access, FILE_SHARE_WRITE);
884
885         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
886                    share_access, FILE_SHARE_READ);
887         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
888                    entry->share_access, FILE_SHARE_READ);
889
890         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
891                    share_access, FILE_SHARE_DELETE);
892         CHECK_MASK(6, access_mask, DELETE_ACCESS,
893                    entry->share_access, FILE_SHARE_DELETE);
894
895         DEBUG(10,("share_conflict: No conflict.\n"));
896         return False;
897 }
898
899 #if defined(DEVELOPER)
900 static void validate_my_share_entries(struct smbd_server_connection *sconn,
901                                       int num,
902                                       struct share_mode_entry *share_entry)
903 {
904         files_struct *fsp;
905
906         if (!procid_is_me(&share_entry->pid)) {
907                 return;
908         }
909
910         if (is_deferred_open_entry(share_entry) &&
911             !open_was_deferred(sconn, share_entry->op_mid)) {
912                 char *str = talloc_asprintf(talloc_tos(),
913                         "Got a deferred entry without a request: "
914                         "PANIC: %s\n",
915                         share_mode_str(talloc_tos(), num, share_entry));
916                 smb_panic(str);
917         }
918
919         if (!is_valid_share_mode_entry(share_entry)) {
920                 return;
921         }
922
923         fsp = file_find_dif(sconn, share_entry->id,
924                             share_entry->share_file_id);
925         if (!fsp) {
926                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
927                          share_mode_str(talloc_tos(), num, share_entry) ));
928                 smb_panic("validate_my_share_entries: Cannot match a "
929                           "share entry with an open file\n");
930         }
931
932         if (is_deferred_open_entry(share_entry)) {
933                 goto panic;
934         }
935
936         if ((share_entry->op_type == NO_OPLOCK) &&
937             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
938                 /* Someone has already written to it, but I haven't yet
939                  * noticed */
940                 return;
941         }
942
943         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
944                 goto panic;
945         }
946
947         return;
948
949  panic:
950         {
951                 char *str;
952                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
953                          share_mode_str(talloc_tos(), num, share_entry) ));
954                 str = talloc_asprintf(talloc_tos(),
955                         "validate_my_share_entries: "
956                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
957                          fsp->fsp_name->base_name,
958                          (unsigned int)fsp->oplock_type,
959                          (unsigned int)share_entry->op_type );
960                 smb_panic(str);
961         }
962 }
963 #endif
964
965 bool is_stat_open(uint32 access_mask)
966 {
967         return (access_mask &&
968                 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
969                                   FILE_WRITE_ATTRIBUTES))==0) &&
970                 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
971                                  FILE_WRITE_ATTRIBUTES)) != 0));
972 }
973
974 /****************************************************************************
975  Deal with share modes
976  Invarient: Share mode must be locked on entry and exit.
977  Returns -1 on error, or number of share modes on success (may be zero).
978 ****************************************************************************/
979
980 static NTSTATUS open_mode_check(connection_struct *conn,
981                                 struct share_mode_lock *lck,
982                                 uint32_t name_hash,
983                                 uint32 access_mask,
984                                 uint32 share_access,
985                                 uint32 create_options,
986                                 bool *file_existed)
987 {
988         int i;
989
990         if(lck->num_share_modes == 0) {
991                 return NT_STATUS_OK;
992         }
993
994         *file_existed = True;
995
996         /* A delete on close prohibits everything */
997
998         if (is_delete_on_close_set(lck, name_hash)) {
999                 return NT_STATUS_DELETE_PENDING;
1000         }
1001
1002         if (is_stat_open(access_mask)) {
1003                 /* Stat open that doesn't trigger oplock breaks or share mode
1004                  * checks... ! JRA. */
1005                 return NT_STATUS_OK;
1006         }
1007
1008         /*
1009          * Check if the share modes will give us access.
1010          */
1011
1012 #if defined(DEVELOPER)
1013         for(i = 0; i < lck->num_share_modes; i++) {
1014                 validate_my_share_entries(conn->sconn, i,
1015                                           &lck->share_modes[i]);
1016         }
1017 #endif
1018
1019         if (!lp_share_modes(SNUM(conn))) {
1020                 return NT_STATUS_OK;
1021         }
1022
1023         /* Now we check the share modes, after any oplock breaks. */
1024         for(i = 0; i < lck->num_share_modes; i++) {
1025
1026                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1027                         continue;
1028                 }
1029
1030                 /* someone else has a share lock on it, check to see if we can
1031                  * too */
1032                 if (share_conflict(&lck->share_modes[i],
1033                                    access_mask, share_access)) {
1034                         return NT_STATUS_SHARING_VIOLATION;
1035                 }
1036         }
1037
1038         return NT_STATUS_OK;
1039 }
1040
1041 static bool is_delete_request(files_struct *fsp) {
1042         return ((fsp->access_mask == DELETE_ACCESS) &&
1043                 (fsp->oplock_type == NO_OPLOCK));
1044 }
1045
1046 /*
1047  * Send a break message to the oplock holder and delay the open for
1048  * our client.
1049  */
1050
1051 static NTSTATUS send_break_message(files_struct *fsp,
1052                                         struct share_mode_entry *exclusive,
1053                                         uint64_t mid,
1054                                         int oplock_request)
1055 {
1056         NTSTATUS status;
1057         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1058
1059         DEBUG(10, ("Sending break request to PID %s\n",
1060                    procid_str_static(&exclusive->pid)));
1061         exclusive->op_mid = mid;
1062
1063         /* Create the message. */
1064         share_mode_entry_to_message(msg, exclusive);
1065
1066         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1067            don't want this set in the share mode struct pointed to by lck. */
1068
1069         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1070                 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1071                         exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1072         }
1073
1074         status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1075                                     MSG_SMB_BREAK_REQUEST,
1076                                     (uint8 *)msg,
1077                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1078         if (!NT_STATUS_IS_OK(status)) {
1079                 DEBUG(3, ("Could not send oplock break message: %s\n",
1080                           nt_errstr(status)));
1081         }
1082
1083         return status;
1084 }
1085
1086 /*
1087  * Return share_mode_entry pointers for :
1088  * 1). Batch oplock entry.
1089  * 2). Batch or exclusive oplock entry (may be identical to #1).
1090  * bool have_level2_oplock
1091  * bool have_no_oplock.
1092  * Do internal consistency checks on the share mode for a file.
1093  */
1094
1095 static void find_oplock_types(files_struct *fsp,
1096                                 int oplock_request,
1097                                 const struct share_mode_lock *lck,
1098                                 struct share_mode_entry **pp_batch,
1099                                 struct share_mode_entry **pp_ex_or_batch,
1100                                 bool *got_level2,
1101                                 bool *got_no_oplock)
1102 {
1103         int i;
1104
1105         *pp_batch = NULL;
1106         *pp_ex_or_batch = NULL;
1107         *got_level2 = false;
1108         *got_no_oplock = false;
1109
1110         /* Ignore stat or internal opens, as is done in
1111                 delay_for_batch_oplocks() and
1112                 delay_for_exclusive_oplocks().
1113          */
1114         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1115                 return;
1116         }
1117
1118         for (i=0; i<lck->num_share_modes; i++) {
1119                 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1120                         continue;
1121                 }
1122
1123                 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1124                                 is_stat_open(lck->share_modes[i].access_mask)) {
1125                         /* We ignore stat opens in the table - they
1126                            always have NO_OPLOCK and never get or
1127                            cause breaks. JRA. */
1128                         continue;
1129                 }
1130
1131                 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1132                         /* batch - can only be one. */
1133                         if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1134                                 smb_panic("Bad batch oplock entry.");
1135                         }
1136                         *pp_batch = &lck->share_modes[i];
1137                 }
1138
1139                 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1140                         /* Exclusive or batch - can only be one. */
1141                         if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1142                                 smb_panic("Bad exclusive or batch oplock entry.");
1143                         }
1144                         *pp_ex_or_batch = &lck->share_modes[i];
1145                 }
1146
1147                 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1148                         if (*pp_batch || *pp_ex_or_batch) {
1149                                 smb_panic("Bad levelII oplock entry.");
1150                         }
1151                         *got_level2 = true;
1152                 }
1153
1154                 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1155                         if (*pp_batch || *pp_ex_or_batch) {
1156                                 smb_panic("Bad no oplock entry.");
1157                         }
1158                         *got_no_oplock = true;
1159                 }
1160         }
1161 }
1162
1163 static bool delay_for_batch_oplocks(files_struct *fsp,
1164                                         uint64_t mid,
1165                                         int oplock_request,
1166                                         struct share_mode_entry *batch_entry)
1167 {
1168         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1169                 return false;
1170         }
1171         if (batch_entry == NULL) {
1172                 return false;
1173         }
1174
1175         /* Found a batch oplock */
1176         send_break_message(fsp, batch_entry, mid, oplock_request);
1177         return true;
1178 }
1179
1180 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1181                                         uint64_t mid,
1182                                         int oplock_request,
1183                                         struct share_mode_entry *ex_entry)
1184 {
1185         bool delay_it;
1186
1187         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1188                 return false;
1189         }
1190         if (ex_entry == NULL) {
1191                 return false;
1192         }
1193
1194         /* Found an exclusive or batch oplock */
1195
1196         delay_it = is_delete_request(fsp) ?
1197                 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1198
1199         if (!delay_it) {
1200                 return false;
1201         }
1202
1203         send_break_message(fsp, ex_entry, mid, oplock_request);
1204         return true;
1205 }
1206
1207 static void grant_fsp_oplock_type(files_struct *fsp,
1208                                 const struct byte_range_lock *br_lck,
1209                                 int oplock_request,
1210                                 bool got_level2_oplock,
1211                                 bool got_a_none_oplock)
1212 {
1213         bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1214                             lp_level2_oplocks(SNUM(fsp->conn));
1215
1216         /* Start by granting what the client asked for,
1217            but ensure no SAMBA_PRIVATE bits can be set. */
1218         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1219
1220         if (oplock_request & INTERNAL_OPEN_ONLY) {
1221                 /* No oplocks on internal open. */
1222                 fsp->oplock_type = NO_OPLOCK;
1223                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1224                         fsp->oplock_type, fsp_str_dbg(fsp)));
1225                 return;
1226         } else if (br_lck && br_lck->num_locks > 0) {
1227                 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1228                         fsp_str_dbg(fsp)));
1229                 fsp->oplock_type = NO_OPLOCK;
1230         }
1231
1232         if (is_stat_open(fsp->access_mask)) {
1233                 /* Leave the value already set. */
1234                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1235                         fsp->oplock_type, fsp_str_dbg(fsp)));
1236                 return;
1237         }
1238
1239         /*
1240          * Match what was requested (fsp->oplock_type) with
1241          * what was found in the existing share modes.
1242          */
1243
1244         if (got_a_none_oplock) {
1245                 fsp->oplock_type = NO_OPLOCK;
1246         } else if (got_level2_oplock) {
1247                 if (fsp->oplock_type == NO_OPLOCK ||
1248                                 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1249                         /* Store a level2 oplock, but don't tell the client */
1250                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1251                 } else {
1252                         fsp->oplock_type = LEVEL_II_OPLOCK;
1253                 }
1254         } else {
1255                 /* All share_mode_entries are placeholders or deferred.
1256                  * Silently upgrade to fake levelII if the client didn't
1257                  * ask for an oplock. */
1258                 if (fsp->oplock_type == NO_OPLOCK) {
1259                         /* Store a level2 oplock, but don't tell the client */
1260                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1261                 }
1262         }
1263
1264         /*
1265          * Don't grant level2 to clients that don't want them
1266          * or if we've turned them off.
1267          */
1268         if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1269                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1270         }
1271
1272         DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1273                   fsp->oplock_type, fsp_str_dbg(fsp)));
1274 }
1275
1276 bool request_timed_out(struct timeval request_time,
1277                        struct timeval timeout)
1278 {
1279         struct timeval now, end_time;
1280         GetTimeOfDay(&now);
1281         end_time = timeval_sum(&request_time, &timeout);
1282         return (timeval_compare(&end_time, &now) < 0);
1283 }
1284
1285 /****************************************************************************
1286  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1287 ****************************************************************************/
1288
1289 static void defer_open(struct share_mode_lock *lck,
1290                        struct timeval request_time,
1291                        struct timeval timeout,
1292                        struct smb_request *req,
1293                        struct deferred_open_record *state)
1294 {
1295         int i;
1296
1297         /* Paranoia check */
1298
1299         for (i=0; i<lck->num_share_modes; i++) {
1300                 struct share_mode_entry *e = &lck->share_modes[i];
1301
1302                 if (is_deferred_open_entry(e) &&
1303                     procid_is_me(&e->pid) &&
1304                     (e->op_mid == req->mid)) {
1305                         DEBUG(0, ("Trying to defer an already deferred "
1306                                 "request: mid=%llu, exiting\n",
1307                                 (unsigned long long)req->mid));
1308                         exit_server("attempt to defer a deferred request");
1309                 }
1310         }
1311
1312         /* End paranoia check */
1313
1314         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1315                   "open entry for mid %llu\n",
1316                   (unsigned int)request_time.tv_sec,
1317                   (unsigned int)request_time.tv_usec,
1318                   (unsigned long long)req->mid));
1319
1320         if (!push_deferred_open_message_smb(req, request_time, timeout,
1321                                        state->id, (char *)state, sizeof(*state))) {
1322                 exit_server("push_deferred_open_message_smb failed");
1323         }
1324         add_deferred_open(lck, req->mid, request_time,
1325                           messaging_server_id(req->sconn->msg_ctx), state->id);
1326 }
1327
1328
1329 /****************************************************************************
1330  On overwrite open ensure that the attributes match.
1331 ****************************************************************************/
1332
1333 bool open_match_attributes(connection_struct *conn,
1334                            uint32 old_dos_attr,
1335                            uint32 new_dos_attr,
1336                            mode_t existing_unx_mode,
1337                            mode_t new_unx_mode,
1338                            mode_t *returned_unx_mode)
1339 {
1340         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1341
1342         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1343         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1344
1345         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) || 
1346            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1347                 *returned_unx_mode = new_unx_mode;
1348         } else {
1349                 *returned_unx_mode = (mode_t)0;
1350         }
1351
1352         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1353                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1354                   "returned_unx_mode = 0%o\n",
1355                   (unsigned int)old_dos_attr,
1356                   (unsigned int)existing_unx_mode,
1357                   (unsigned int)new_dos_attr,
1358                   (unsigned int)*returned_unx_mode ));
1359
1360         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1361         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1362                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1363                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1364                         return False;
1365                 }
1366         }
1367         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1368                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1369                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1370                         return False;
1371                 }
1372         }
1373         return True;
1374 }
1375
1376 /****************************************************************************
1377  Special FCB or DOS processing in the case of a sharing violation.
1378  Try and find a duplicated file handle.
1379 ****************************************************************************/
1380
1381 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1382                                      connection_struct *conn,
1383                                      files_struct *fsp_to_dup_into,
1384                                      const struct smb_filename *smb_fname,
1385                                      struct file_id id,
1386                                      uint16 file_pid,
1387                                      uint16 vuid,
1388                                      uint32 access_mask,
1389                                      uint32 share_access,
1390                                      uint32 create_options)
1391 {
1392         files_struct *fsp;
1393
1394         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1395                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
1396
1397         for(fsp = file_find_di_first(conn->sconn, id); fsp;
1398             fsp = file_find_di_next(fsp)) {
1399
1400                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1401                           "vuid = %u, file_pid = %u, private_options = 0x%x "
1402                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1403                           fsp->fh->fd, (unsigned int)fsp->vuid,
1404                           (unsigned int)fsp->file_pid,
1405                           (unsigned int)fsp->fh->private_options,
1406                           (unsigned int)fsp->access_mask ));
1407
1408                 if (fsp->fh->fd != -1 &&
1409                     fsp->vuid == vuid &&
1410                     fsp->file_pid == file_pid &&
1411                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1412                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1413                     (fsp->access_mask & FILE_WRITE_DATA) &&
1414                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1415                     strequal(fsp->fsp_name->stream_name,
1416                              smb_fname->stream_name)) {
1417                         DEBUG(10,("fcb_or_dos_open: file match\n"));
1418                         break;
1419                 }
1420         }
1421
1422         if (!fsp) {
1423                 return NT_STATUS_NOT_FOUND;
1424         }
1425
1426         /* quite an insane set of semantics ... */
1427         if (is_executable(smb_fname->base_name) &&
1428             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1429                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1430                 return NT_STATUS_INVALID_PARAMETER;
1431         }
1432
1433         /* We need to duplicate this fsp. */
1434         return dup_file_fsp(req, fsp, access_mask, share_access,
1435                             create_options, fsp_to_dup_into);
1436 }
1437
1438 static void schedule_defer_open(struct share_mode_lock *lck,
1439                                 struct timeval request_time,
1440                                 struct smb_request *req)
1441 {
1442         struct deferred_open_record state;
1443
1444         /* This is a relative time, added to the absolute
1445            request_time value to get the absolute timeout time.
1446            Note that if this is the second or greater time we enter
1447            this codepath for this particular request mid then
1448            request_time is left as the absolute time of the *first*
1449            time this request mid was processed. This is what allows
1450            the request to eventually time out. */
1451
1452         struct timeval timeout;
1453
1454         /* Normally the smbd we asked should respond within
1455          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1456          * the client did, give twice the timeout as a safety
1457          * measure here in case the other smbd is stuck
1458          * somewhere else. */
1459
1460         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1461
1462         /* Nothing actually uses state.delayed_for_oplocks
1463            but it's handy to differentiate in debug messages
1464            between a 30 second delay due to oplock break, and
1465            a 1 second delay for share mode conflicts. */
1466
1467         state.delayed_for_oplocks = True;
1468         state.id = lck->id;
1469
1470         if (!request_timed_out(request_time, timeout)) {
1471                 defer_open(lck, request_time, timeout, req, &state);
1472         }
1473 }
1474
1475 /****************************************************************************
1476  Work out what access_mask to use from what the client sent us.
1477 ****************************************************************************/
1478
1479 static NTSTATUS smbd_calculate_maximum_allowed_access(
1480         connection_struct *conn,
1481         const struct smb_filename *smb_fname,
1482         bool file_existed,
1483         uint32_t *p_access_mask)
1484 {
1485         NTSTATUS status;
1486
1487         if (get_current_uid(conn) == (uid_t)0) {
1488                 *p_access_mask |= FILE_GENERIC_ALL;
1489                 return NT_STATUS_OK;
1490         }
1491
1492         if (file_existed) {
1493                 struct security_descriptor *sd;
1494                 uint32_t access_granted = 0;
1495
1496                 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1497                                             (SECINFO_OWNER |
1498                                              SECINFO_GROUP |
1499                                              SECINFO_DACL),&sd);
1500
1501                 if (!NT_STATUS_IS_OK(status)) {
1502                         DEBUG(10,("smbd_calculate_access_mask: "
1503                                   "Could not get acl on file %s: %s\n",
1504                                   smb_fname_str_dbg(smb_fname),
1505                                   nt_errstr(status)));
1506                         return NT_STATUS_ACCESS_DENIED;
1507                 }
1508
1509                 /*
1510                  * Never test FILE_READ_ATTRIBUTES. se_access_check()
1511                  * also takes care of owner WRITE_DAC and READ_CONTROL.
1512                  */
1513                 status = se_access_check(sd,
1514                                          get_current_nttok(conn),
1515                                          (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1516                                          &access_granted);
1517
1518                 TALLOC_FREE(sd);
1519
1520                 if (!NT_STATUS_IS_OK(status)) {
1521                         DEBUG(10, ("smbd_calculate_access_mask: "
1522                                    "Access denied on file %s: "
1523                                    "when calculating maximum access\n",
1524                                    smb_fname_str_dbg(smb_fname)));
1525                         return NT_STATUS_ACCESS_DENIED;
1526                 }
1527
1528                 *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1529                 return NT_STATUS_OK;
1530         }
1531
1532         *p_access_mask = FILE_GENERIC_ALL;
1533         return NT_STATUS_OK;
1534 }
1535
1536 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1537                                     const struct smb_filename *smb_fname,
1538                                     bool file_existed,
1539                                     uint32_t access_mask,
1540                                     uint32_t *access_mask_out)
1541 {
1542         NTSTATUS status;
1543         uint32_t orig_access_mask = access_mask;
1544         uint32_t rejected_share_access;
1545
1546         /*
1547          * Convert GENERIC bits to specific bits.
1548          */
1549
1550         se_map_generic(&access_mask, &file_generic_mapping);
1551
1552         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1553         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1554
1555                 status = smbd_calculate_maximum_allowed_access(
1556                         conn, smb_fname, file_existed, &access_mask);
1557
1558                 if (!NT_STATUS_IS_OK(status)) {
1559                         return status;
1560                 }
1561
1562                 access_mask &= conn->share_access;
1563         }
1564
1565         rejected_share_access = access_mask & ~(conn->share_access);
1566
1567         if (rejected_share_access) {
1568                 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1569                         "file %s: rejected by share access mask[0x%08X] "
1570                         "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1571                         smb_fname_str_dbg(smb_fname),
1572                         conn->share_access,
1573                         orig_access_mask, access_mask,
1574                         rejected_share_access));
1575                 return NT_STATUS_ACCESS_DENIED;
1576         }
1577
1578         *access_mask_out = access_mask;
1579         return NT_STATUS_OK;
1580 }
1581
1582 /****************************************************************************
1583  Remove the deferred open entry under lock.
1584 ****************************************************************************/
1585
1586 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1587                                 struct server_id pid)
1588 {
1589         struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1590                         NULL, NULL, NULL);
1591         if (lck == NULL) {
1592                 DEBUG(0, ("could not get share mode lock\n"));
1593                 return;
1594         }
1595         del_deferred_open_entry(lck, mid, pid);
1596         TALLOC_FREE(lck);
1597 }
1598
1599 /****************************************************************
1600  Ensure we get the brlock lock followed by the share mode lock
1601  in the correct order to prevent deadlocks if other smbd's are
1602  using the brlock database on this file simultaneously with this open
1603  (that code also gets the locks in brlock -> share mode lock order).
1604 ****************************************************************/
1605
1606 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1607                                 files_struct *fsp,
1608                                 const struct file_id id,
1609                                 const char *connectpath,
1610                                 const struct smb_filename *smb_fname,
1611                                 const struct timespec *p_old_write_time,
1612                                 struct share_mode_lock **p_lck,
1613                                 struct byte_range_lock **p_br_lck)
1614 {
1615         /* Ordering - we must get the br_lck for this
1616            file before the share mode. */
1617         if (lp_locking(fsp->conn->params)) {
1618                 *p_br_lck = brl_get_locks_readonly(fsp);
1619                 if (*p_br_lck == NULL) {
1620                         DEBUG(0, ("Could not get br_lock\n"));
1621                         return false;
1622                 }
1623                 /* Note - we don't need to free the returned
1624                    br_lck explicitly as it was allocated on talloc_tos()
1625                    and so will be autofreed (and release the lock)
1626                    once the frame context disappears.
1627
1628                    If it was set to fsp->brlock_rec then it was
1629                    talloc_move'd to hang off the fsp pointer and
1630                    in this case is guarenteed to not be holding the
1631                    lock on the brlock database. */
1632         }
1633
1634         *p_lck = get_share_mode_lock(mem_ctx,
1635                                 id,
1636                                 connectpath,
1637                                 smb_fname,
1638                                 p_old_write_time);
1639
1640         if (*p_lck == NULL) {
1641                 DEBUG(0, ("Could not get share mode lock\n"));
1642                 TALLOC_FREE(*p_br_lck);
1643                 return false;
1644         }
1645         return true;
1646 }
1647
1648 /****************************************************************************
1649  Open a file with a share mode. Passed in an already created files_struct *.
1650 ****************************************************************************/
1651
1652 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1653                             struct smb_request *req,
1654                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1655                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1656                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1657                             uint32 create_options,      /* options such as delete on close. */
1658                             uint32 new_dos_attributes,  /* attributes used for new file. */
1659                             int oplock_request,         /* internal Samba oplock codes. */
1660                                                         /* Information (FILE_EXISTS etc.) */
1661                             uint32_t private_flags,     /* Samba specific flags. */
1662                             int *pinfo,
1663                             files_struct *fsp)
1664 {
1665         struct smb_filename *smb_fname = fsp->fsp_name;
1666         int flags=0;
1667         int flags2=0;
1668         bool file_existed = VALID_STAT(smb_fname->st);
1669         bool def_acl = False;
1670         bool posix_open = False;
1671         bool new_file_created = False;
1672         bool clear_ads = false;
1673         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1674         mode_t new_unx_mode = (mode_t)0;
1675         mode_t unx_mode = (mode_t)0;
1676         int info;
1677         uint32 existing_dos_attributes = 0;
1678         struct timeval request_time = timeval_zero();
1679         struct share_mode_lock *lck = NULL;
1680         uint32 open_access_mask = access_mask;
1681         NTSTATUS status;
1682         char *parent_dir;
1683
1684         if (conn->printer) {
1685                 /*
1686                  * Printers are handled completely differently.
1687                  * Most of the passed parameters are ignored.
1688                  */
1689
1690                 if (pinfo) {
1691                         *pinfo = FILE_WAS_CREATED;
1692                 }
1693
1694                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1695                            smb_fname_str_dbg(smb_fname)));
1696
1697                 if (!req) {
1698                         DEBUG(0,("open_file_ntcreate: printer open without "
1699                                 "an SMB request!\n"));
1700                         return NT_STATUS_INTERNAL_ERROR;
1701                 }
1702
1703                 return print_spool_open(fsp, smb_fname->base_name,
1704                                         req->vuid);
1705         }
1706
1707         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1708                             NULL)) {
1709                 return NT_STATUS_NO_MEMORY;
1710         }
1711
1712         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1713                 posix_open = True;
1714                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1715                 new_dos_attributes = 0;
1716         } else {
1717                 /* Windows allows a new file to be created and
1718                    silently removes a FILE_ATTRIBUTE_DIRECTORY
1719                    sent by the client. Do the same. */
1720
1721                 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1722
1723                 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1724                  * created new. */
1725                 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1726                                      smb_fname, parent_dir);
1727         }
1728
1729         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1730                    "access_mask=0x%x share_access=0x%x "
1731                    "create_disposition = 0x%x create_options=0x%x "
1732                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1733                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
1734                    access_mask, share_access, create_disposition,
1735                    create_options, (unsigned int)unx_mode, oplock_request,
1736                    (unsigned int)private_flags));
1737
1738         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1739                 DEBUG(0, ("No smb request but not an internal only open!\n"));
1740                 return NT_STATUS_INTERNAL_ERROR;
1741         }
1742
1743         /*
1744          * Only non-internal opens can be deferred at all
1745          */
1746
1747         if (req) {
1748                 void *ptr;
1749                 if (get_deferred_open_message_state(req,
1750                                 &request_time,
1751                                 &ptr)) {
1752
1753                         struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1754                         /* Remember the absolute time of the original
1755                            request with this mid. We'll use it later to
1756                            see if this has timed out. */
1757
1758                         /* Remove the deferred open entry under lock. */
1759                         remove_deferred_open_entry(
1760                                 state->id, req->mid,
1761                                 messaging_server_id(req->sconn->msg_ctx));
1762
1763                         /* Ensure we don't reprocess this message. */
1764                         remove_deferred_open_message_smb(req->sconn, req->mid);
1765                 }
1766         }
1767
1768         if (!posix_open) {
1769                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1770                 if (file_existed) {
1771                         existing_dos_attributes = dos_mode(conn, smb_fname);
1772                 }
1773         }
1774
1775         /* ignore any oplock requests if oplocks are disabled */
1776         if (!lp_oplocks(SNUM(conn)) ||
1777             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1778                 /* Mask off everything except the private Samba bits. */
1779                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1780         }
1781
1782         /* this is for OS/2 long file names - say we don't support them */
1783         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1784                 /* OS/2 Workplace shell fix may be main code stream in a later
1785                  * release. */
1786                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1787                          "supported.\n"));
1788                 if (use_nt_status()) {
1789                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1790                 }
1791                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1792         }
1793
1794         switch( create_disposition ) {
1795                 /*
1796                  * Currently we're using FILE_SUPERSEDE as the same as
1797                  * FILE_OVERWRITE_IF but they really are
1798                  * different. FILE_SUPERSEDE deletes an existing file
1799                  * (requiring delete access) then recreates it.
1800                  */
1801                 case FILE_SUPERSEDE:
1802                         /* If file exists replace/overwrite. If file doesn't
1803                          * exist create. */
1804                         flags2 |= (O_CREAT | O_TRUNC);
1805                         clear_ads = true;
1806                         break;
1807
1808                 case FILE_OVERWRITE_IF:
1809                         /* If file exists replace/overwrite. If file doesn't
1810                          * exist create. */
1811                         flags2 |= (O_CREAT | O_TRUNC);
1812                         clear_ads = true;
1813                         break;
1814
1815                 case FILE_OPEN:
1816                         /* If file exists open. If file doesn't exist error. */
1817                         if (!file_existed) {
1818                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1819                                          "requested for file %s and file "
1820                                          "doesn't exist.\n",
1821                                          smb_fname_str_dbg(smb_fname)));
1822                                 errno = ENOENT;
1823                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1824                         }
1825                         break;
1826
1827                 case FILE_OVERWRITE:
1828                         /* If file exists overwrite. If file doesn't exist
1829                          * error. */
1830                         if (!file_existed) {
1831                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1832                                          "requested for file %s and file "
1833                                          "doesn't exist.\n",
1834                                          smb_fname_str_dbg(smb_fname) ));
1835                                 errno = ENOENT;
1836                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1837                         }
1838                         flags2 |= O_TRUNC;
1839                         clear_ads = true;
1840                         break;
1841
1842                 case FILE_CREATE:
1843                         /* If file exists error. If file doesn't exist
1844                          * create. */
1845                         if (file_existed) {
1846                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1847                                          "requested for file %s and file "
1848                                          "already exists.\n",
1849                                          smb_fname_str_dbg(smb_fname)));
1850                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1851                                         errno = EISDIR;
1852                                 } else {
1853                                         errno = EEXIST;
1854                                 }
1855                                 return map_nt_error_from_unix(errno);
1856                         }
1857                         flags2 |= (O_CREAT|O_EXCL);
1858                         break;
1859
1860                 case FILE_OPEN_IF:
1861                         /* If file exists open. If file doesn't exist
1862                          * create. */
1863                         flags2 |= O_CREAT;
1864                         break;
1865
1866                 default:
1867                         return NT_STATUS_INVALID_PARAMETER;
1868         }
1869
1870         /* We only care about matching attributes on file exists and
1871          * overwrite. */
1872
1873         if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1874                              (create_disposition == FILE_OVERWRITE_IF))) {
1875                 if (!open_match_attributes(conn, existing_dos_attributes,
1876                                            new_dos_attributes,
1877                                            smb_fname->st.st_ex_mode,
1878                                            unx_mode, &new_unx_mode)) {
1879                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
1880                                  "for file %s (%x %x) (0%o, 0%o)\n",
1881                                  smb_fname_str_dbg(smb_fname),
1882                                  existing_dos_attributes,
1883                                  new_dos_attributes,
1884                                  (unsigned int)smb_fname->st.st_ex_mode,
1885                                  (unsigned int)unx_mode ));
1886                         errno = EACCES;
1887                         return NT_STATUS_ACCESS_DENIED;
1888                 }
1889         }
1890
1891         status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1892                                         access_mask,
1893                                         &access_mask); 
1894         if (!NT_STATUS_IS_OK(status)) {
1895                 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1896                         "on file %s returned %s\n",
1897                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1898                 return status;
1899         }
1900
1901         open_access_mask = access_mask;
1902
1903         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1904                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1905         }
1906
1907         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1908                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1909                     access_mask));
1910
1911         /*
1912          * Note that we ignore the append flag as append does not
1913          * mean the same thing under DOS and Unix.
1914          */
1915
1916         if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1917                         (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1918                 /* DENY_DOS opens are always underlying read-write on the
1919                    file handle, no matter what the requested access mask
1920                     says. */
1921                 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1922                         access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1923                         flags = O_RDWR;
1924                 } else {
1925                         flags = O_WRONLY;
1926                 }
1927         } else {
1928                 flags = O_RDONLY;
1929         }
1930
1931         /*
1932          * Currently we only look at FILE_WRITE_THROUGH for create options.
1933          */
1934
1935 #if defined(O_SYNC)
1936         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1937                 flags2 |= O_SYNC;
1938         }
1939 #endif /* O_SYNC */
1940
1941         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1942                 flags2 |= O_APPEND;
1943         }
1944
1945         if (!posix_open && !CAN_WRITE(conn)) {
1946                 /*
1947                  * We should really return a permission denied error if either
1948                  * O_CREAT or O_TRUNC are set, but for compatibility with
1949                  * older versions of Samba we just AND them out.
1950                  */
1951                 flags2 &= ~(O_CREAT|O_TRUNC);
1952         }
1953
1954         /*
1955          * Ensure we can't write on a read-only share or file.
1956          */
1957
1958         if (flags != O_RDONLY && file_existed &&
1959             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1960                 DEBUG(5,("open_file_ntcreate: write access requested for "
1961                          "file %s on read only %s\n",
1962                          smb_fname_str_dbg(smb_fname),
1963                          !CAN_WRITE(conn) ? "share" : "file" ));
1964                 errno = EACCES;
1965                 return NT_STATUS_ACCESS_DENIED;
1966         }
1967
1968         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1969         fsp->share_access = share_access;
1970         fsp->fh->private_options = private_flags;
1971         fsp->access_mask = open_access_mask; /* We change this to the
1972                                               * requested access_mask after
1973                                               * the open is done. */
1974         fsp->posix_open = posix_open;
1975
1976         /* Ensure no SAMBA_PRIVATE bits can be set. */
1977         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1978
1979         if (timeval_is_zero(&request_time)) {
1980                 request_time = fsp->open_time;
1981         }
1982
1983         if (file_existed) {
1984                 struct byte_range_lock *br_lck = NULL;
1985                 struct share_mode_entry *batch_entry = NULL;
1986                 struct share_mode_entry *exclusive_entry = NULL;
1987                 bool got_level2_oplock = false;
1988                 bool got_a_none_oplock = false;
1989                 struct file_id id;
1990
1991                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1992                 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1993
1994                 if (!acquire_ordered_locks(talloc_tos(),
1995                                         fsp,
1996                                         id,
1997                                         conn->connectpath,
1998                                         smb_fname,
1999                                         &old_write_time,
2000                                         &lck,
2001                                         &br_lck)) {
2002                         return NT_STATUS_SHARING_VIOLATION;
2003                 }
2004
2005                 /* Get the types we need to examine. */
2006                 find_oplock_types(fsp,
2007                                 oplock_request,
2008                                 lck,
2009                                 &batch_entry,
2010                                 &exclusive_entry,
2011                                 &got_level2_oplock,
2012                                 &got_a_none_oplock);
2013
2014                 /* First pass - send break only on batch oplocks. */
2015                 if ((req != NULL) &&
2016                                 delay_for_batch_oplocks(fsp,
2017                                         req->mid,
2018                                         oplock_request,
2019                                         batch_entry)) {
2020                         schedule_defer_open(lck, request_time, req);
2021                         TALLOC_FREE(lck);
2022                         return NT_STATUS_SHARING_VIOLATION;
2023                 }
2024
2025                 /* Use the client requested access mask here, not the one we
2026                  * open with. */
2027                 status = open_mode_check(conn, lck, fsp->name_hash,
2028                                         access_mask, share_access,
2029                                          create_options, &file_existed);
2030
2031                 if (NT_STATUS_IS_OK(status)) {
2032                         /* We might be going to allow this open. Check oplock
2033                          * status again. */
2034                         /* Second pass - send break for both batch or
2035                          * exclusive oplocks. */
2036                         if ((req != NULL) &&
2037                                         delay_for_exclusive_oplocks(
2038                                                 fsp,
2039                                                 req->mid,
2040                                                 oplock_request,
2041                                                 exclusive_entry)) {
2042                                 schedule_defer_open(lck, request_time, req);
2043                                 TALLOC_FREE(lck);
2044                                 return NT_STATUS_SHARING_VIOLATION;
2045                         }
2046                 }
2047
2048                 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2049                         /* DELETE_PENDING is not deferred for a second */
2050                         TALLOC_FREE(lck);
2051                         return status;
2052                 }
2053
2054                 grant_fsp_oplock_type(fsp,
2055                                 br_lck,
2056                                 oplock_request,
2057                                 got_level2_oplock,
2058                                 got_a_none_oplock);
2059
2060                 if (!NT_STATUS_IS_OK(status)) {
2061                         uint32 can_access_mask;
2062                         bool can_access = True;
2063
2064                         SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2065
2066                         /* Check if this can be done with the deny_dos and fcb
2067                          * calls. */
2068                         if (private_flags &
2069                             (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2070                              NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2071                                 if (req == NULL) {
2072                                         DEBUG(0, ("DOS open without an SMB "
2073                                                   "request!\n"));
2074                                         TALLOC_FREE(lck);
2075                                         return NT_STATUS_INTERNAL_ERROR;
2076                                 }
2077
2078                                 /* Use the client requested access mask here,
2079                                  * not the one we open with. */
2080                                 status = fcb_or_dos_open(req,
2081                                                         conn,
2082                                                         fsp,
2083                                                         smb_fname,
2084                                                         id,
2085                                                         req->smbpid,
2086                                                         req->vuid,
2087                                                         access_mask,
2088                                                         share_access,
2089                                                         create_options);
2090
2091                                 if (NT_STATUS_IS_OK(status)) {
2092                                         TALLOC_FREE(lck);
2093                                         if (pinfo) {
2094                                                 *pinfo = FILE_WAS_OPENED;
2095                                         }
2096                                         return NT_STATUS_OK;
2097                                 }
2098                         }
2099
2100                         /*
2101                          * This next line is a subtlety we need for
2102                          * MS-Access. If a file open will fail due to share
2103                          * permissions and also for security (access) reasons,
2104                          * we need to return the access failed error, not the
2105                          * share error. We can't open the file due to kernel
2106                          * oplock deadlock (it's possible we failed above on
2107                          * the open_mode_check()) so use a userspace check.
2108                          */
2109
2110                         if (flags & O_RDWR) {
2111                                 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2112                         } else if (flags & O_WRONLY) {
2113                                 can_access_mask = FILE_WRITE_DATA;
2114                         } else {
2115                                 can_access_mask = FILE_READ_DATA;
2116                         }
2117
2118                         if (((can_access_mask & FILE_WRITE_DATA) &&
2119                                 !CAN_WRITE(conn)) ||
2120                                 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2121                                                 smb_fname, can_access_mask))) {
2122                                 can_access = False;
2123                         }
2124
2125                         /*
2126                          * If we're returning a share violation, ensure we
2127                          * cope with the braindead 1 second delay.
2128                          */
2129
2130                         if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2131                             lp_defer_sharing_violations()) {
2132                                 struct timeval timeout;
2133                                 struct deferred_open_record state;
2134                                 int timeout_usecs;
2135
2136                                 /* this is a hack to speed up torture tests
2137                                    in 'make test' */
2138                                 timeout_usecs = lp_parm_int(SNUM(conn),
2139                                                             "smbd","sharedelay",
2140                                                             SHARING_VIOLATION_USEC_WAIT);
2141
2142                                 /* This is a relative time, added to the absolute
2143                                    request_time value to get the absolute timeout time.
2144                                    Note that if this is the second or greater time we enter
2145                                    this codepath for this particular request mid then
2146                                    request_time is left as the absolute time of the *first*
2147                                    time this request mid was processed. This is what allows
2148                                    the request to eventually time out. */
2149
2150                                 timeout = timeval_set(0, timeout_usecs);
2151
2152                                 /* Nothing actually uses state.delayed_for_oplocks
2153                                    but it's handy to differentiate in debug messages
2154                                    between a 30 second delay due to oplock break, and
2155                                    a 1 second delay for share mode conflicts. */
2156
2157                                 state.delayed_for_oplocks = False;
2158                                 state.id = id;
2159
2160                                 if ((req != NULL)
2161                                     && !request_timed_out(request_time,
2162                                                           timeout)) {
2163                                         defer_open(lck, request_time, timeout,
2164                                                    req, &state);
2165                                 }
2166                         }
2167
2168                         TALLOC_FREE(lck);
2169                         if (can_access) {
2170                                 /*
2171                                  * We have detected a sharing violation here
2172                                  * so return the correct error code
2173                                  */
2174                                 status = NT_STATUS_SHARING_VIOLATION;
2175                         } else {
2176                                 status = NT_STATUS_ACCESS_DENIED;
2177                         }
2178                         return status;
2179                 }
2180
2181                 /*
2182                  * We exit this block with the share entry *locked*.....
2183                  */
2184         }
2185
2186         SMB_ASSERT(!file_existed || (lck != NULL));
2187
2188         /*
2189          * Ensure we pay attention to default ACLs on directories if required.
2190          */
2191
2192         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2193             (def_acl = directory_has_default_acl(conn, parent_dir))) {
2194                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2195         }
2196
2197         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2198                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2199                  (unsigned int)flags, (unsigned int)flags2,
2200                  (unsigned int)unx_mode, (unsigned int)access_mask,
2201                  (unsigned int)open_access_mask));
2202
2203         /*
2204          * open_file strips any O_TRUNC flags itself.
2205          */
2206
2207         fsp_open = open_file(fsp, conn, req, parent_dir,
2208                              flags|flags2, unx_mode, access_mask,
2209                              open_access_mask);
2210
2211         if (!NT_STATUS_IS_OK(fsp_open)) {
2212                 TALLOC_FREE(lck);
2213                 return fsp_open;
2214         }
2215
2216         if (!file_existed) {
2217                 struct byte_range_lock *br_lck = NULL;
2218                 struct share_mode_entry *batch_entry = NULL;
2219                 struct share_mode_entry *exclusive_entry = NULL;
2220                 bool got_level2_oplock = false;
2221                 bool got_a_none_oplock = false;
2222                 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2223                 struct file_id id;
2224                 /*
2225                  * Deal with the race condition where two smbd's detect the
2226                  * file doesn't exist and do the create at the same time. One
2227                  * of them will win and set a share mode, the other (ie. this
2228                  * one) should check if the requested share mode for this
2229                  * create is allowed.
2230                  */
2231
2232                 /*
2233                  * Now the file exists and fsp is successfully opened,
2234                  * fsp->dev and fsp->inode are valid and should replace the
2235                  * dev=0,inode=0 from a non existent file. Spotted by
2236                  * Nadav Danieli <nadavd@exanet.com>. JRA.
2237                  */
2238
2239                 id = fsp->file_id;
2240
2241                 if (!acquire_ordered_locks(talloc_tos(),
2242                                         fsp,
2243                                         id,
2244                                         conn->connectpath,
2245                                         smb_fname,
2246                                         &old_write_time,
2247                                         &lck,
2248                                         &br_lck)) {
2249                         return NT_STATUS_SHARING_VIOLATION;
2250                 }
2251
2252                 /* Get the types we need to examine. */
2253                 find_oplock_types(fsp,
2254                                 oplock_request,
2255                                 lck,
2256                                 &batch_entry,
2257                                 &exclusive_entry,
2258                                 &got_level2_oplock,
2259                                 &got_a_none_oplock);
2260
2261                 /* First pass - send break only on batch oplocks. */
2262                 if ((req != NULL) &&
2263                                 delay_for_batch_oplocks(fsp,
2264                                         req->mid,
2265                                         oplock_request,
2266                                         batch_entry)) {
2267                         schedule_defer_open(lck, request_time, req);
2268                         TALLOC_FREE(lck);
2269                         fd_close(fsp);
2270                         return NT_STATUS_SHARING_VIOLATION;
2271                 }
2272
2273                 status = open_mode_check(conn, lck, fsp->name_hash,
2274                                         access_mask, share_access,
2275                                          create_options, &file_existed);
2276
2277                 if (NT_STATUS_IS_OK(status)) {
2278                         /* We might be going to allow this open. Check oplock
2279                          * status again. */
2280                         /* Second pass - send break for both batch or
2281                          * exclusive oplocks. */
2282                         if ((req != NULL) &&
2283                                         delay_for_exclusive_oplocks(
2284                                                 fsp,
2285                                                 req->mid,
2286                                                 oplock_request,
2287                                                 exclusive_entry)) {
2288                                 schedule_defer_open(lck, request_time, req);
2289                                 TALLOC_FREE(lck);
2290                                 fd_close(fsp);
2291                                 return NT_STATUS_SHARING_VIOLATION;
2292                         }
2293                 }
2294
2295                 if (!NT_STATUS_IS_OK(status)) {
2296                         struct deferred_open_record state;
2297
2298                         state.delayed_for_oplocks = False;
2299                         state.id = id;
2300
2301                         /* Do it all over again immediately. In the second
2302                          * round we will find that the file existed and handle
2303                          * the DELETE_PENDING and FCB cases correctly. No need
2304                          * to duplicate the code here. Essentially this is a
2305                          * "goto top of this function", but don't tell
2306                          * anybody... */
2307
2308                         if (req != NULL) {
2309                                 defer_open(lck, request_time, timeval_zero(),
2310                                            req, &state);
2311                         }
2312                         TALLOC_FREE(lck);
2313                         fd_close(fsp);
2314                         return status;
2315                 }
2316
2317                 grant_fsp_oplock_type(fsp,
2318                                 br_lck,
2319                                 oplock_request,
2320                                 got_level2_oplock,
2321                                 got_a_none_oplock);
2322
2323                 /*
2324                  * We exit this block with the share entry *locked*.....
2325                  */
2326
2327         }
2328
2329         SMB_ASSERT(lck != NULL);
2330
2331         /* Delete streams if create_disposition requires it */
2332         if (file_existed && clear_ads &&
2333             !is_ntfs_stream_smb_fname(smb_fname)) {
2334                 status = delete_all_streams(conn, smb_fname->base_name);
2335                 if (!NT_STATUS_IS_OK(status)) {
2336                         TALLOC_FREE(lck);
2337                         fd_close(fsp);
2338                         return status;
2339                 }
2340         }
2341
2342         /* note that we ignore failure for the following. It is
2343            basically a hack for NFS, and NFS will never set one of
2344            these only read them. Nobody but Samba can ever set a deny
2345            mode and we have already checked our more authoritative
2346            locking database for permission to set this deny mode. If
2347            the kernel refuses the operations then the kernel is wrong.
2348            note that GPFS supports it as well - jmcd */
2349
2350         if (fsp->fh->fd != -1) {
2351                 int ret_flock;
2352                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2353                 if(ret_flock == -1 ){
2354
2355                         TALLOC_FREE(lck);
2356                         fd_close(fsp);
2357
2358                         return NT_STATUS_SHARING_VIOLATION;
2359                 }
2360         }
2361
2362         /*
2363          * At this point onwards, we can guarentee that the share entry
2364          * is locked, whether we created the file or not, and that the
2365          * deny mode is compatible with all current opens.
2366          */
2367
2368         /*
2369          * If requested, truncate the file.
2370          */
2371
2372         if (file_existed && (flags2&O_TRUNC)) {
2373                 /*
2374                  * We are modifing the file after open - update the stat
2375                  * struct..
2376                  */
2377                 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2378                     (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2379                         status = map_nt_error_from_unix(errno);
2380                         TALLOC_FREE(lck);
2381                         fd_close(fsp);
2382                         return status;
2383                 }
2384         }
2385
2386         /*
2387          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2388          * but we don't have to store this - just ignore it on access check.
2389          */
2390         if (conn->sconn->using_smb2) {
2391                 /*
2392                  * SMB2 doesn't return it (according to Microsoft tests).
2393                  * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2394                  * File created with access = 0x7 (Read, Write, Delete)
2395                  * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2396                  */
2397                 fsp->access_mask = access_mask;
2398         } else {
2399                 /* But SMB1 does. */
2400                 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2401         }
2402
2403         if (file_existed) {
2404                 /* stat opens on existing files don't get oplocks. */
2405                 if (is_stat_open(open_access_mask)) {
2406                         fsp->oplock_type = NO_OPLOCK;
2407                 }
2408
2409                 if (flags2 & O_TRUNC) {
2410                         info = FILE_WAS_OVERWRITTEN;
2411                 } else {
2412                         info = FILE_WAS_OPENED;
2413                 }
2414         } else {
2415                 info = FILE_WAS_CREATED;
2416         }
2417
2418         if (pinfo) {
2419                 *pinfo = info;
2420         }
2421
2422         /*
2423          * Setup the oplock info in both the shared memory and
2424          * file structs.
2425          */
2426
2427         if (!set_file_oplock(fsp, fsp->oplock_type)) {
2428                 /*
2429                  * Could not get the kernel oplock or there are byte-range
2430                  * locks on the file.
2431                  */
2432                 fsp->oplock_type = NO_OPLOCK;
2433         }
2434
2435         set_share_mode(lck, fsp, get_current_uid(conn),
2436                         req ? req->mid : 0,
2437                        fsp->oplock_type);
2438
2439         /* Handle strange delete on close create semantics. */
2440         if (create_options & FILE_DELETE_ON_CLOSE) {
2441
2442                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2443
2444                 if (!NT_STATUS_IS_OK(status)) {
2445                         /* Remember to delete the mode we just added. */
2446                         del_share_mode(lck, fsp);
2447                         TALLOC_FREE(lck);
2448                         fd_close(fsp);
2449                         return status;
2450                 }
2451                 /* Note that here we set the *inital* delete on close flag,
2452                    not the regular one. The magic gets handled in close. */
2453                 fsp->initial_delete_on_close = True;
2454         }
2455
2456         if (info == FILE_WAS_OVERWRITTEN
2457             || info == FILE_WAS_CREATED
2458             || info == FILE_WAS_SUPERSEDED) {
2459                 new_file_created = True;
2460         }
2461
2462         if (new_file_created) {
2463                 /* Files should be initially set as archive */
2464                 if (lp_map_archive(SNUM(conn)) ||
2465                     lp_store_dos_attributes(SNUM(conn))) {
2466                         if (!posix_open) {
2467                                 if (file_set_dosmode(conn, smb_fname,
2468                                             new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2469                                             parent_dir, true) == 0) {
2470                                         unx_mode = smb_fname->st.st_ex_mode;
2471                                 }
2472                         }
2473                 }
2474         }
2475
2476         /* Determine sparse flag. */
2477         if (posix_open) {
2478                 /* POSIX opens are sparse by default. */
2479                 fsp->is_sparse = true;
2480         } else {
2481                 fsp->is_sparse = (file_existed &&
2482                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2483         }
2484
2485         /*
2486          * Take care of inherited ACLs on created files - if default ACL not
2487          * selected.
2488          */
2489
2490         if (!posix_open && !file_existed && !def_acl) {
2491
2492                 int saved_errno = errno; /* We might get ENOSYS in the next
2493                                           * call.. */
2494
2495                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2496                     errno == ENOSYS) {
2497                         errno = saved_errno; /* Ignore ENOSYS */
2498                 }
2499
2500         } else if (new_unx_mode) {
2501
2502                 int ret = -1;
2503
2504                 /* Attributes need changing. File already existed. */
2505
2506                 {
2507                         int saved_errno = errno; /* We might get ENOSYS in the
2508                                                   * next call.. */
2509                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2510
2511                         if (ret == -1 && errno == ENOSYS) {
2512                                 errno = saved_errno; /* Ignore ENOSYS */
2513                         } else {
2514                                 DEBUG(5, ("open_file_ntcreate: reset "
2515                                           "attributes of file %s to 0%o\n",
2516                                           smb_fname_str_dbg(smb_fname),
2517                                           (unsigned int)new_unx_mode));
2518                                 ret = 0; /* Don't do the fchmod below. */
2519                         }
2520                 }
2521
2522                 if ((ret == -1) &&
2523                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2524                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2525                                   "attributes of file %s to 0%o\n",
2526                                   smb_fname_str_dbg(smb_fname),
2527                                   (unsigned int)new_unx_mode));
2528         }
2529
2530         /* If this is a successful open, we must remove any deferred open
2531          * records. */
2532         if (req != NULL) {
2533                 del_deferred_open_entry(lck, req->mid,
2534                                         messaging_server_id(req->sconn->msg_ctx));
2535         }
2536         TALLOC_FREE(lck);
2537
2538         return NT_STATUS_OK;
2539 }
2540
2541
2542 /****************************************************************************
2543  Open a file for for write to ensure that we can fchmod it.
2544 ****************************************************************************/
2545
2546 NTSTATUS open_file_fchmod(connection_struct *conn,
2547                           struct smb_filename *smb_fname,
2548                           files_struct **result)
2549 {
2550         if (!VALID_STAT(smb_fname->st)) {
2551                 return NT_STATUS_INVALID_PARAMETER;
2552         }
2553
2554         return SMB_VFS_CREATE_FILE(
2555                 conn,                                   /* conn */
2556                 NULL,                                   /* req */
2557                 0,                                      /* root_dir_fid */
2558                 smb_fname,                              /* fname */
2559                 FILE_WRITE_DATA,                        /* access_mask */
2560                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2561                     FILE_SHARE_DELETE),
2562                 FILE_OPEN,                              /* create_disposition*/
2563                 0,                                      /* create_options */
2564                 0,                                      /* file_attributes */
2565                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2566                 0,                                      /* allocation_size */
2567                 0,                                      /* private_flags */
2568                 NULL,                                   /* sd */
2569                 NULL,                                   /* ea_list */
2570                 result,                                 /* result */
2571                 NULL);                                  /* pinfo */
2572 }
2573
2574 static NTSTATUS mkdir_internal(connection_struct *conn,
2575                                struct smb_filename *smb_dname,
2576                                uint32 file_attributes)
2577 {
2578         mode_t mode;
2579         char *parent_dir = NULL;
2580         NTSTATUS status;
2581         bool posix_open = false;
2582         bool need_re_stat = false;
2583         uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2584
2585         if(access_mask & ~(conn->share_access)) {
2586                 DEBUG(5,("mkdir_internal: failing share access "
2587                          "%s\n", lp_servicename(SNUM(conn))));
2588                 return NT_STATUS_ACCESS_DENIED;
2589         }
2590
2591         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2592                             NULL)) {
2593                 return NT_STATUS_NO_MEMORY;
2594         }
2595
2596         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2597                 posix_open = true;
2598                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2599         } else {
2600                 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2601         }
2602
2603         status = check_parent_access(conn,
2604                                         smb_dname,
2605                                         access_mask,
2606                                         &parent_dir);
2607         if(!NT_STATUS_IS_OK(status)) {
2608                 DEBUG(5,("mkdir_internal: check_parent_access "
2609                         "on directory %s for path %s returned %s\n",
2610                         parent_dir,
2611                         smb_dname->base_name,
2612                         nt_errstr(status) ));
2613                 return status;
2614         }
2615
2616         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2617                 return map_nt_error_from_unix(errno);
2618         }
2619
2620         /* Ensure we're checking for a symlink here.... */
2621         /* We don't want to get caught by a symlink racer. */
2622
2623         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2624                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2625                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2626                 return map_nt_error_from_unix(errno);
2627         }
2628
2629         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2630                 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2631                           smb_fname_str_dbg(smb_dname)));
2632                 return NT_STATUS_NOT_A_DIRECTORY;
2633         }
2634
2635         if (lp_store_dos_attributes(SNUM(conn))) {
2636                 if (!posix_open) {
2637                         file_set_dosmode(conn, smb_dname,
2638                                          file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2639                                          parent_dir, true);
2640                 }
2641         }
2642
2643         if (lp_inherit_perms(SNUM(conn))) {
2644                 inherit_access_posix_acl(conn, parent_dir,
2645                                          smb_dname->base_name, mode);
2646                 need_re_stat = true;
2647         }
2648
2649         if (!posix_open) {
2650                 /*
2651                  * Check if high bits should have been set,
2652                  * then (if bits are missing): add them.
2653                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2654                  * dir.
2655                  */
2656                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2657                     (mode & ~smb_dname->st.st_ex_mode)) {
2658                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2659                                       (smb_dname->st.st_ex_mode |
2660                                           (mode & ~smb_dname->st.st_ex_mode)));
2661                         need_re_stat = true;
2662                 }
2663         }
2664
2665         /* Change the owner if required. */
2666         if (lp_inherit_owner(SNUM(conn))) {
2667                 change_dir_owner_to_parent(conn, parent_dir,
2668                                            smb_dname->base_name,
2669                                            &smb_dname->st);
2670                 need_re_stat = true;
2671         }
2672
2673         if (need_re_stat) {
2674                 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2675                         DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2676                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2677                         return map_nt_error_from_unix(errno);
2678                 }
2679         }
2680
2681         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2682                      smb_dname->base_name);
2683
2684         return NT_STATUS_OK;
2685 }
2686
2687 /****************************************************************************
2688  Ensure we didn't get symlink raced on opening a directory.
2689 ****************************************************************************/
2690
2691 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2692                         const SMB_STRUCT_STAT *sbuf2)
2693 {
2694         if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2695                         sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2696                         sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2697                         sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2698                 return false;
2699         }
2700         return true;
2701 }
2702
2703 /****************************************************************************
2704  Open a directory from an NT SMB call.
2705 ****************************************************************************/
2706
2707 static NTSTATUS open_directory(connection_struct *conn,
2708                                struct smb_request *req,
2709                                struct smb_filename *smb_dname,
2710                                uint32 access_mask,
2711                                uint32 share_access,
2712                                uint32 create_disposition,
2713                                uint32 create_options,
2714                                uint32 file_attributes,
2715                                int *pinfo,
2716                                files_struct **result)
2717 {
2718         files_struct *fsp = NULL;
2719         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2720         struct share_mode_lock *lck = NULL;
2721         NTSTATUS status;
2722         struct timespec mtimespec;
2723         int info = 0;
2724
2725         SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2726
2727         /* Ensure we have a directory attribute. */
2728         file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2729
2730         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2731                  "share_access = 0x%x create_options = 0x%x, "
2732                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2733                  smb_fname_str_dbg(smb_dname),
2734                  (unsigned int)access_mask,
2735                  (unsigned int)share_access,
2736                  (unsigned int)create_options,
2737                  (unsigned int)create_disposition,
2738                  (unsigned int)file_attributes));
2739
2740         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2741                         (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2742                         is_ntfs_stream_smb_fname(smb_dname)) {
2743                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2744                           smb_fname_str_dbg(smb_dname)));
2745                 return NT_STATUS_NOT_A_DIRECTORY;
2746         }
2747
2748         status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2749                                             access_mask, &access_mask);
2750         if (!NT_STATUS_IS_OK(status)) {
2751                 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2752                         "on file %s returned %s\n",
2753                         smb_fname_str_dbg(smb_dname),
2754                         nt_errstr(status)));
2755                 return status;
2756         }
2757
2758         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2759                         !security_token_has_privilege(get_current_nttok(conn),
2760                                         SEC_PRIV_SECURITY)) {
2761                 DEBUG(10, ("open_directory: open on %s "
2762                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2763                         smb_fname_str_dbg(smb_dname)));
2764                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2765         }
2766
2767         switch( create_disposition ) {
2768                 case FILE_OPEN:
2769
2770                         if (!dir_existed) {
2771                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2772                         }
2773
2774                         info = FILE_WAS_OPENED;
2775                         break;
2776
2777                 case FILE_CREATE:
2778
2779                         /* If directory exists error. If directory doesn't
2780                          * exist create. */
2781
2782                         if (dir_existed) {
2783                                 status = NT_STATUS_OBJECT_NAME_COLLISION;
2784                                 DEBUG(2, ("open_directory: unable to create "
2785                                           "%s. Error was %s\n",
2786                                           smb_fname_str_dbg(smb_dname),
2787                                           nt_errstr(status)));
2788                                 return status;
2789                         }
2790
2791                         status = mkdir_internal(conn, smb_dname,
2792                                                 file_attributes);
2793
2794                         if (!NT_STATUS_IS_OK(status)) {
2795                                 DEBUG(2, ("open_directory: unable to create "
2796                                           "%s. Error was %s\n",
2797                                           smb_fname_str_dbg(smb_dname),
2798                                           nt_errstr(status)));
2799                                 return status;
2800                         }
2801
2802                         info = FILE_WAS_CREATED;
2803                         break;
2804
2805                 case FILE_OPEN_IF:
2806                         /*
2807                          * If directory exists open. If directory doesn't
2808                          * exist create.
2809                          */
2810
2811                         if (dir_existed) {
2812                                 status = NT_STATUS_OK;
2813                                 info = FILE_WAS_OPENED;
2814                         } else {
2815                                 status = mkdir_internal(conn, smb_dname,
2816                                                 file_attributes);
2817
2818                                 if (NT_STATUS_IS_OK(status)) {
2819                                         info = FILE_WAS_CREATED;
2820                                 } else {
2821                                         /* Cope with create race. */
2822                                         if (!NT_STATUS_EQUAL(status,
2823                                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
2824                                                 DEBUG(2, ("open_directory: unable to create "
2825                                                         "%s. Error was %s\n",
2826                                                         smb_fname_str_dbg(smb_dname),
2827                                                         nt_errstr(status)));
2828                                                 return status;
2829                                         }
2830                                         info = FILE_WAS_OPENED;
2831                                 }
2832                         }
2833
2834                         break;
2835
2836                 case FILE_SUPERSEDE:
2837                 case FILE_OVERWRITE:
2838                 case FILE_OVERWRITE_IF:
2839                 default:
2840                         DEBUG(5,("open_directory: invalid create_disposition "
2841                                  "0x%x for directory %s\n",
2842                                  (unsigned int)create_disposition,
2843                                  smb_fname_str_dbg(smb_dname)));
2844                         return NT_STATUS_INVALID_PARAMETER;
2845         }
2846
2847         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2848                 DEBUG(5,("open_directory: %s is not a directory !\n",
2849                          smb_fname_str_dbg(smb_dname)));
2850                 return NT_STATUS_NOT_A_DIRECTORY;
2851         }
2852
2853         if (info == FILE_WAS_OPENED) {
2854                 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2855                 if (!NT_STATUS_IS_OK(status)) {
2856                         DEBUG(10, ("open_directory: smbd_check_access_rights on "
2857                                 "file %s failed with %s\n",
2858                                 smb_fname_str_dbg(smb_dname),
2859                                 nt_errstr(status)));
2860                         return status;
2861                 }
2862         }
2863
2864         status = file_new(req, conn, &fsp);
2865         if(!NT_STATUS_IS_OK(status)) {
2866                 return status;
2867         }
2868
2869         /*
2870          * Setup the files_struct for it.
2871          */
2872
2873         fsp->mode = smb_dname->st.st_ex_mode;
2874         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2875         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2876         fsp->file_pid = req ? req->smbpid : 0;
2877         fsp->can_lock = False;
2878         fsp->can_read = False;
2879         fsp->can_write = False;
2880
2881         fsp->share_access = share_access;
2882         fsp->fh->private_options = 0;
2883         /*
2884          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2885          */
2886         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2887         fsp->print_file = NULL;
2888         fsp->modified = False;
2889         fsp->oplock_type = NO_OPLOCK;
2890         fsp->sent_oplock_break = NO_BREAK_SENT;
2891         fsp->is_directory = True;
2892         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2893         status = fsp_set_smb_fname(fsp, smb_dname);
2894         if (!NT_STATUS_IS_OK(status)) {
2895                 file_free(req, fsp);
2896                 return status;
2897         }
2898
2899         mtimespec = smb_dname->st.st_ex_mtime;
2900
2901 #ifdef O_DIRECTORY
2902         status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2903 #else
2904         /* POSIX allows us to open a directory with O_RDONLY. */
2905         status = fd_open(conn, fsp, O_RDONLY, 0);
2906 #endif
2907         if (!NT_STATUS_IS_OK(status)) {
2908                 DEBUG(5, ("open_directory: Could not open fd for "
2909                         "%s (%s)\n",
2910                         smb_fname_str_dbg(smb_dname),
2911                         nt_errstr(status)));
2912                 file_free(req, fsp);
2913                 return status;
2914         }
2915
2916         status = vfs_stat_fsp(fsp);
2917         if (!NT_STATUS_IS_OK(status)) {
2918                 fd_close(fsp);
2919                 file_free(req, fsp);
2920                 return status;
2921         }
2922
2923         /* Ensure there was no race condition. */
2924         if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2925                 DEBUG(5,("open_directory: stat struct differs for "
2926                         "directory %s.\n",
2927                         smb_fname_str_dbg(smb_dname)));
2928                 fd_close(fsp);
2929                 file_free(req, fsp);
2930                 return NT_STATUS_ACCESS_DENIED;
2931         }
2932
2933         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2934                                   conn->connectpath, smb_dname, &mtimespec);
2935
2936         if (lck == NULL) {
2937                 DEBUG(0, ("open_directory: Could not get share mode lock for "
2938                           "%s\n", smb_fname_str_dbg(smb_dname)));
2939                 fd_close(fsp);
2940                 file_free(req, fsp);
2941                 return NT_STATUS_SHARING_VIOLATION;
2942         }
2943
2944         status = open_mode_check(conn, lck, fsp->name_hash,
2945                                 access_mask, share_access,
2946                                  create_options, &dir_existed);
2947
2948         if (!NT_STATUS_IS_OK(status)) {
2949                 TALLOC_FREE(lck);
2950                 fd_close(fsp);
2951                 file_free(req, fsp);
2952                 return status;
2953         }
2954
2955         set_share_mode(lck, fsp, get_current_uid(conn),
2956                         req ? req->mid : 0, NO_OPLOCK);
2957
2958         /* For directories the delete on close bit at open time seems
2959            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2960         if (create_options & FILE_DELETE_ON_CLOSE) {
2961                 status = can_set_delete_on_close(fsp, 0);
2962                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2963                         TALLOC_FREE(lck);
2964                         fd_close(fsp);
2965                         file_free(req, fsp);
2966                         return status;
2967                 }
2968
2969                 if (NT_STATUS_IS_OK(status)) {
2970                         /* Note that here we set the *inital* delete on close flag,
2971                            not the regular one. The magic gets handled in close. */
2972                         fsp->initial_delete_on_close = True;
2973                 }
2974         }
2975
2976         TALLOC_FREE(lck);
2977
2978         if (pinfo) {
2979                 *pinfo = info;
2980         }
2981
2982         *result = fsp;
2983         return NT_STATUS_OK;
2984 }
2985
2986 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2987                           struct smb_filename *smb_dname)
2988 {
2989         NTSTATUS status;
2990         files_struct *fsp;
2991
2992         status = SMB_VFS_CREATE_FILE(
2993                 conn,                                   /* conn */
2994                 req,                                    /* req */
2995                 0,                                      /* root_dir_fid */
2996                 smb_dname,                              /* fname */
2997                 FILE_READ_ATTRIBUTES,                   /* access_mask */
2998                 FILE_SHARE_NONE,                        /* share_access */
2999                 FILE_CREATE,                            /* create_disposition*/
3000                 FILE_DIRECTORY_FILE,                    /* create_options */
3001                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
3002                 0,                                      /* oplock_request */
3003                 0,                                      /* allocation_size */
3004                 0,                                      /* private_flags */
3005                 NULL,                                   /* sd */
3006                 NULL,                                   /* ea_list */
3007                 &fsp,                                   /* result */
3008                 NULL);                                  /* pinfo */
3009
3010         if (NT_STATUS_IS_OK(status)) {
3011                 close_file(req, fsp, NORMAL_CLOSE);
3012         }
3013
3014         return status;
3015 }
3016
3017 /****************************************************************************
3018  Receive notification that one of our open files has been renamed by another
3019  smbd process.
3020 ****************************************************************************/
3021
3022 void msg_file_was_renamed(struct messaging_context *msg,
3023                           void *private_data,
3024                           uint32_t msg_type,
3025                           struct server_id server_id,
3026                           DATA_BLOB *data)
3027 {
3028         files_struct *fsp;
3029         char *frm = (char *)data->data;
3030         struct file_id id;
3031         const char *sharepath;
3032         const char *base_name;
3033         const char *stream_name;
3034         struct smb_filename *smb_fname = NULL;
3035         size_t sp_len, bn_len;
3036         NTSTATUS status;
3037         struct smbd_server_connection *sconn =
3038                 talloc_get_type_abort(private_data,
3039                 struct smbd_server_connection);
3040
3041         if (data->data == NULL
3042             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3043                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3044                           (int)data->length));
3045                 return;
3046         }
3047
3048         /* Unpack the message. */
3049         pull_file_id_24(frm, &id);
3050         sharepath = &frm[24];
3051         sp_len = strlen(sharepath);
3052         base_name = sharepath + sp_len + 1;
3053         bn_len = strlen(base_name);
3054         stream_name = sharepath + sp_len + 1 + bn_len + 1;
3055
3056         /* stream_name must always be NULL if there is no stream. */
3057         if (stream_name[0] == '\0') {
3058                 stream_name = NULL;
3059         }
3060
3061         status = create_synthetic_smb_fname(talloc_tos(), base_name,
3062                                             stream_name, NULL, &smb_fname);
3063         if (!NT_STATUS_IS_OK(status)) {
3064                 return;
3065         }
3066
3067         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3068                 "file_id %s\n",
3069                 sharepath, smb_fname_str_dbg(smb_fname),
3070                 file_id_string_tos(&id)));
3071
3072         for(fsp = file_find_di_first(sconn, id); fsp;
3073             fsp = file_find_di_next(fsp)) {
3074                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3075
3076                         DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3077                                 fsp->fnum, fsp_str_dbg(fsp),
3078                                 smb_fname_str_dbg(smb_fname)));
3079                         status = fsp_set_smb_fname(fsp, smb_fname);
3080                         if (!NT_STATUS_IS_OK(status)) {
3081                                 goto out;
3082                         }
3083                 } else {
3084                         /* TODO. JRA. */
3085                         /* Now we have the complete path we can work out if this is
3086                            actually within this share and adjust newname accordingly. */
3087                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3088                                 "not sharepath %s) "
3089                                 "fnum %d from %s -> %s\n",
3090                                 fsp->conn->connectpath,
3091                                 sharepath,
3092                                 fsp->fnum,
3093                                 fsp_str_dbg(fsp),
3094                                 smb_fname_str_dbg(smb_fname)));
3095                 }
3096         }
3097  out:
3098         TALLOC_FREE(smb_fname);
3099         return;
3100 }
3101
3102 /*
3103  * If a main file is opened for delete, all streams need to be checked for
3104  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3105  * If that works, delete them all by setting the delete on close and close.
3106  */
3107
3108 NTSTATUS open_streams_for_delete(connection_struct *conn,
3109                                         const char *fname)
3110 {
3111         struct stream_struct *stream_info = NULL;
3112         files_struct **streams = NULL;
3113         int i;
3114         unsigned int num_streams = 0;
3115         TALLOC_CTX *frame = talloc_stackframe();
3116         NTSTATUS status;
3117
3118         status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3119                                 &num_streams, &stream_info);
3120
3121         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3122             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3123                 DEBUG(10, ("no streams around\n"));
3124                 TALLOC_FREE(frame);
3125                 return NT_STATUS_OK;
3126         }
3127
3128         if (!NT_STATUS_IS_OK(status)) {
3129                 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3130                            nt_errstr(status)));
3131                 goto fail;
3132         }
3133
3134         DEBUG(10, ("open_streams_for_delete found %d streams\n",
3135                    num_streams));
3136
3137         if (num_streams == 0) {
3138                 TALLOC_FREE(frame);
3139                 return NT_STATUS_OK;
3140         }
3141
3142         streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3143         if (streams == NULL) {
3144                 DEBUG(0, ("talloc failed\n"));
3145                 status = NT_STATUS_NO_MEMORY;
3146                 goto fail;
3147         }
3148
3149         for (i=0; i<num_streams; i++) {
3150                 struct smb_filename *smb_fname = NULL;
3151
3152                 if (strequal(stream_info[i].name, "::$DATA")) {
3153                         streams[i] = NULL;
3154                         continue;
3155                 }
3156
3157                 status = create_synthetic_smb_fname(talloc_tos(), fname,
3158                                                     stream_info[i].name,
3159                                                     NULL, &smb_fname);
3160                 if (!NT_STATUS_IS_OK(status)) {
3161                         goto fail;
3162                 }
3163
3164                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3165                         DEBUG(10, ("Unable to stat stream: %s\n",
3166                                    smb_fname_str_dbg(smb_fname)));
3167                 }
3168
3169                 status = SMB_VFS_CREATE_FILE(
3170                          conn,                  /* conn */
3171                          NULL,                  /* req */
3172                          0,                     /* root_dir_fid */
3173                          smb_fname,             /* fname */
3174                          DELETE_ACCESS,         /* access_mask */
3175                          (FILE_SHARE_READ |     /* share_access */
3176                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3177                          FILE_OPEN,             /* create_disposition*/
3178                          0,                     /* create_options */
3179                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3180                          0,                     /* oplock_request */
3181                          0,                     /* allocation_size */
3182                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3183                          NULL,                  /* sd */
3184                          NULL,                  /* ea_list */
3185                          &streams[i],           /* result */
3186                          NULL);                 /* pinfo */
3187
3188                 if (!NT_STATUS_IS_OK(status)) {
3189                         DEBUG(10, ("Could not open stream %s: %s\n",
3190                                    smb_fname_str_dbg(smb_fname),
3191                                    nt_errstr(status)));
3192
3193                         TALLOC_FREE(smb_fname);
3194                         break;
3195                 }
3196                 TALLOC_FREE(smb_fname);
3197         }
3198
3199         /*
3200          * don't touch the variable "status" beyond this point :-)
3201          */
3202
3203         for (i -= 1 ; i >= 0; i--) {
3204                 if (streams[i] == NULL) {
3205                         continue;
3206                 }
3207
3208                 DEBUG(10, ("Closing stream # %d, %s\n", i,
3209                            fsp_str_dbg(streams[i])));
3210                 close_file(NULL, streams[i], NORMAL_CLOSE);
3211         }
3212
3213  fail:
3214         TALLOC_FREE(frame);
3215         return status;
3216 }
3217
3218 /*********************************************************************
3219  Create a default ACL by inheriting from the parent. If no inheritance
3220  from the parent available, don't set anything. This will leave the actual
3221  permissions the new file or directory already got from the filesystem
3222  as the NT ACL when read.
3223 *********************************************************************/
3224
3225 static NTSTATUS inherit_new_acl(files_struct *fsp)
3226 {
3227         TALLOC_CTX *ctx = talloc_tos();
3228         char *parent_name = NULL;
3229         struct security_descriptor *parent_desc = NULL;
3230         NTSTATUS status = NT_STATUS_OK;
3231         struct security_descriptor *psd = NULL;
3232         struct dom_sid *owner_sid = NULL;
3233         struct dom_sid *group_sid = NULL;
3234         uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3235         bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3236         bool inheritable_components = false;
3237         size_t size = 0;
3238
3239         if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3240                 return NT_STATUS_NO_MEMORY;
3241         }
3242
3243         status = SMB_VFS_GET_NT_ACL(fsp->conn,
3244                                 parent_name,
3245                                 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3246                                 &parent_desc);
3247         if (!NT_STATUS_IS_OK(status)) {
3248                 return status;
3249         }
3250
3251         inheritable_components = sd_has_inheritable_components(parent_desc,
3252                                         fsp->is_directory);
3253
3254         if (!inheritable_components && !inherit_owner) {
3255                 /* Nothing to inherit and not setting owner. */
3256                 return NT_STATUS_OK;
3257         }
3258
3259         /* Create an inherited descriptor from the parent. */
3260
3261         if (DEBUGLEVEL >= 10) {
3262                 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3263                         fsp_str_dbg(fsp) ));
3264                 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3265         }
3266
3267         /* Inherit from parent descriptor if "inherit owner" set. */
3268         if (inherit_owner) {
3269                 owner_sid = parent_desc->owner_sid;
3270                 group_sid = parent_desc->group_sid;
3271         }
3272
3273         if (owner_sid == NULL) {
3274                 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3275         }
3276         if (group_sid == NULL) {
3277                 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3278         }
3279
3280         status = se_create_child_secdesc(ctx,
3281                         &psd,
3282                         &size,
3283                         parent_desc,
3284                         owner_sid,
3285                         group_sid,
3286                         fsp->is_directory);
3287         if (!NT_STATUS_IS_OK(status)) {
3288                 return status;
3289         }
3290
3291         /* If inheritable_components == false,
3292            se_create_child_secdesc()
3293            creates a security desriptor with a NULL dacl
3294            entry, but with SEC_DESC_DACL_PRESENT. We need
3295            to remove that flag. */
3296
3297         if (!inheritable_components) {
3298                 security_info_sent &= ~SECINFO_DACL;
3299                 psd->type &= ~SEC_DESC_DACL_PRESENT;
3300         }
3301
3302         if (DEBUGLEVEL >= 10) {
3303                 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3304                         fsp_str_dbg(fsp) ));
3305                 NDR_PRINT_DEBUG(security_descriptor, psd);
3306         }
3307
3308         if (inherit_owner) {
3309                 /* We need to be root to force this. */
3310                 become_root();
3311         }
3312         status = SMB_VFS_FSET_NT_ACL(fsp,
3313                         security_info_sent,
3314                         psd);
3315         if (inherit_owner) {
3316                 unbecome_root();
3317         }
3318         return status;
3319 }
3320
3321 /*
3322  * Wrapper around open_file_ntcreate and open_directory
3323  */
3324
3325 static NTSTATUS create_file_unixpath(connection_struct *conn,
3326                                      struct smb_request *req,
3327                                      struct smb_filename *smb_fname,
3328                                      uint32_t access_mask,
3329                                      uint32_t share_access,
3330                                      uint32_t create_disposition,
3331                                      uint32_t create_options,
3332                                      uint32_t file_attributes,
3333                                      uint32_t oplock_request,
3334                                      uint64_t allocation_size,
3335                                      uint32_t private_flags,
3336                                      struct security_descriptor *sd,
3337                                      struct ea_list *ea_list,
3338
3339                                      files_struct **result,
3340                                      int *pinfo)
3341 {
3342         int info = FILE_WAS_OPENED;
3343         files_struct *base_fsp = NULL;
3344         files_struct *fsp = NULL;
3345         NTSTATUS status;
3346
3347         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3348                   "file_attributes = 0x%x, share_access = 0x%x, "
3349                   "create_disposition = 0x%x create_options = 0x%x "
3350                   "oplock_request = 0x%x private_flags = 0x%x "
3351                   "ea_list = 0x%p, sd = 0x%p, "
3352                   "fname = %s\n",
3353                   (unsigned int)access_mask,
3354                   (unsigned int)file_attributes,
3355                   (unsigned int)share_access,
3356                   (unsigned int)create_disposition,
3357                   (unsigned int)create_options,
3358                   (unsigned int)oplock_request,
3359                   (unsigned int)private_flags,
3360                   ea_list, sd, smb_fname_str_dbg(smb_fname)));
3361
3362         if (create_options & FILE_OPEN_BY_FILE_ID) {
3363                 status = NT_STATUS_NOT_SUPPORTED;
3364                 goto fail;
3365         }
3366
3367         if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3368                 status = NT_STATUS_INVALID_PARAMETER;
3369                 goto fail;
3370         }
3371
3372         if (req == NULL) {
3373                 oplock_request |= INTERNAL_OPEN_ONLY;
3374         }
3375
3376         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3377             && (access_mask & DELETE_ACCESS)
3378             && !is_ntfs_stream_smb_fname(smb_fname)) {
3379                 /*
3380                  * We can't open a file with DELETE access if any of the
3381                  * streams is open without FILE_SHARE_DELETE
3382                  */
3383                 status = open_streams_for_delete(conn, smb_fname->base_name);
3384
3385                 if (!NT_STATUS_IS_OK(status)) {
3386                         goto fail;
3387                 }
3388         }
3389
3390         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3391                         !security_token_has_privilege(get_current_nttok(conn),
3392                                         SEC_PRIV_SECURITY)) {
3393                 DEBUG(10, ("create_file_unixpath: open on %s "
3394                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3395                         smb_fname_str_dbg(smb_fname)));
3396                 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3397                 goto fail;
3398         }
3399
3400         if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3401             && is_ntfs_stream_smb_fname(smb_fname)
3402             && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3403                 uint32 base_create_disposition;
3404                 struct smb_filename *smb_fname_base = NULL;
3405
3406                 if (create_options & FILE_DIRECTORY_FILE) {
3407                         status = NT_STATUS_NOT_A_DIRECTORY;
3408                         goto fail;
3409                 }
3410
3411                 switch (create_disposition) {
3412                 case FILE_OPEN:
3413                         base_create_disposition = FILE_OPEN;
3414                         break;
3415                 default:
3416                         base_create_disposition = FILE_OPEN_IF;
3417                         break;
3418                 }
3419
3420                 /* Create an smb_filename with stream_name == NULL. */
3421                 status = create_synthetic_smb_fname(talloc_tos(),
3422                                                     smb_fname->base_name,
3423                                                     NULL, NULL,
3424                                                     &smb_fname_base);
3425                 if (!NT_STATUS_IS_OK(status)) {
3426                         goto fail;
3427                 }