s3: No code change, just re-indent
[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 "serverid.h"
33 #include "messages.h"
34
35 extern const struct generic_mapping file_generic_mapping;
36
37 struct deferred_open_record {
38         bool delayed_for_oplocks;
39         bool async_open;
40         struct file_id id;
41 };
42
43 /****************************************************************************
44  If the requester wanted DELETE_ACCESS and was rejected because
45  the file ACL didn't include DELETE_ACCESS, see if the parent ACL
46  overrides this.
47 ****************************************************************************/
48
49 static bool parent_override_delete(connection_struct *conn,
50                                         const struct smb_filename *smb_fname,
51                                         uint32_t access_mask,
52                                         uint32_t rejected_mask)
53 {
54         if ((access_mask & DELETE_ACCESS) &&
55                     (rejected_mask & DELETE_ACCESS) &&
56                     can_delete_file_in_directory(conn, smb_fname)) {
57                 return true;
58         }
59         return false;
60 }
61
62 /****************************************************************************
63  Check if we have open rights.
64 ****************************************************************************/
65
66 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
67                                 const struct smb_filename *smb_fname,
68                                 bool use_privs,
69                                 uint32_t access_mask)
70 {
71         /* Check if we have rights to open. */
72         NTSTATUS status;
73         struct security_descriptor *sd = NULL;
74         uint32_t rejected_share_access;
75         uint32_t rejected_mask = access_mask;
76
77         rejected_share_access = access_mask & ~(conn->share_access);
78
79         if (rejected_share_access) {
80                 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
81                         "on %s (0x%x)\n",
82                         (unsigned int)access_mask,
83                         smb_fname_str_dbg(smb_fname),
84                         (unsigned int)rejected_share_access ));
85                 return NT_STATUS_ACCESS_DENIED;
86         }
87
88         if (!use_privs && get_current_uid(conn) == (uid_t)0) {
89                 /* I'm sorry sir, I didn't know you were root... */
90                 DEBUG(10,("smbd_check_access_rights: root override "
91                         "on %s. Granting 0x%x\n",
92                         smb_fname_str_dbg(smb_fname),
93                         (unsigned int)access_mask ));
94                 return NT_STATUS_OK;
95         }
96
97         if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
98                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
99                         "on DELETE_ACCESS on file %s. Granting 0x%x\n",
100                         smb_fname_str_dbg(smb_fname),
101                         (unsigned int)access_mask ));
102                 return NT_STATUS_OK;
103         }
104
105         if (access_mask == DELETE_ACCESS &&
106                         VALID_STAT(smb_fname->st) &&
107                         S_ISLNK(smb_fname->st.st_ex_mode)) {
108                 /* We can always delete a symlink. */
109                 DEBUG(10,("smbd_check_access_rights: not checking ACL "
110                         "on DELETE_ACCESS on symlink %s.\n",
111                         smb_fname_str_dbg(smb_fname) ));
112                 return NT_STATUS_OK;
113         }
114
115         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
116                         (SECINFO_OWNER |
117                         SECINFO_GROUP |
118                         SECINFO_DACL),&sd);
119
120         if (!NT_STATUS_IS_OK(status)) {
121                 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
122                         "on %s: %s\n",
123                         smb_fname_str_dbg(smb_fname),
124                         nt_errstr(status)));
125
126                 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
127                         goto access_denied;
128                 }
129
130                 return status;
131         }
132
133         /*
134          * Never test FILE_READ_ATTRIBUTES. se_file_access_check() also takes care of
135          * owner WRITE_DAC and READ_CONTROL.
136          */
137         status = se_file_access_check(sd,
138                                 get_current_nttok(conn),
139                                 use_privs,
140                                 (access_mask & ~FILE_READ_ATTRIBUTES),
141                                 &rejected_mask);
142
143         DEBUG(10,("smbd_check_access_rights: file %s requesting "
144                 "0x%x returning 0x%x (%s)\n",
145                 smb_fname_str_dbg(smb_fname),
146                 (unsigned int)access_mask,
147                 (unsigned int)rejected_mask,
148                 nt_errstr(status) ));
149
150         if (!NT_STATUS_IS_OK(status)) {
151                 if (DEBUGLEVEL >= 10) {
152                         DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
153                                 smb_fname_str_dbg(smb_fname) ));
154                         NDR_PRINT_DEBUG(security_descriptor, sd);
155                 }
156         }
157
158         TALLOC_FREE(sd);
159
160         if (NT_STATUS_IS_OK(status) ||
161                         !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
162                 return status;
163         }
164
165         /* Here we know status == NT_STATUS_ACCESS_DENIED. */
166
167   access_denied:
168
169         if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
170                         (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
171                         !lp_store_dos_attributes(SNUM(conn)) &&
172                         (lp_map_readonly(SNUM(conn)) ||
173                         lp_map_archive(SNUM(conn)) ||
174                         lp_map_hidden(SNUM(conn)) ||
175                         lp_map_system(SNUM(conn)))) {
176                 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
177
178                 DEBUG(10,("smbd_check_access_rights: "
179                         "overrode "
180                         "FILE_WRITE_ATTRIBUTES "
181                         "on file %s\n",
182                         smb_fname_str_dbg(smb_fname)));
183         }
184
185         if (parent_override_delete(conn,
186                                 smb_fname,
187                                 access_mask,
188                                 rejected_mask)) {
189                 /* Were we trying to do an open
190                  * for delete and didn't get DELETE
191                  * access (only) ? Check if the
192                  * directory allows DELETE_CHILD.
193                  * See here:
194                  * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
195                  * for details. */
196
197                 rejected_mask &= ~DELETE_ACCESS;
198
199                 DEBUG(10,("smbd_check_access_rights: "
200                         "overrode "
201                         "DELETE_ACCESS on "
202                         "file %s\n",
203                         smb_fname_str_dbg(smb_fname)));
204         }
205
206         if (rejected_mask != 0) {
207                 return NT_STATUS_ACCESS_DENIED;
208         }
209         return NT_STATUS_OK;
210 }
211
212 static NTSTATUS check_parent_access(struct connection_struct *conn,
213                                 struct smb_filename *smb_fname,
214                                 uint32_t access_mask)
215 {
216         NTSTATUS status;
217         char *parent_dir = NULL;
218         struct security_descriptor *parent_sd = NULL;
219         uint32_t access_granted = 0;
220
221         if (!parent_dirname(talloc_tos(),
222                                 smb_fname->base_name,
223                                 &parent_dir,
224                                 NULL)) {
225                 return NT_STATUS_NO_MEMORY;
226         }
227
228         if (get_current_uid(conn) == (uid_t)0) {
229                 /* I'm sorry sir, I didn't know you were root... */
230                 DEBUG(10,("check_parent_access: root override "
231                         "on %s. Granting 0x%x\n",
232                         smb_fname_str_dbg(smb_fname),
233                         (unsigned int)access_mask ));
234                 return NT_STATUS_OK;
235         }
236
237         status = SMB_VFS_GET_NT_ACL(conn,
238                                 parent_dir,
239                                 SECINFO_DACL,
240                                 &parent_sd);
241
242         if (!NT_STATUS_IS_OK(status)) {
243                 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
244                         "%s with error %s\n",
245                         parent_dir,
246                         nt_errstr(status)));
247                 return status;
248         }
249
250         /*
251          * Never test FILE_READ_ATTRIBUTES. se_file_access_check() also takes care of
252          * owner WRITE_DAC and READ_CONTROL.
253          */
254         status = se_file_access_check(parent_sd,
255                                 get_current_nttok(conn),
256                                 false,
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 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                 int posix_errno = errno;
300 #ifdef O_NOFOLLOW
301 #if defined(ENOTSUP) && defined(OSF1)
302                 /* handle special Tru64 errno */
303                 if (errno == ENOTSUP) {
304                         posix_errno = ELOOP;
305                 }
306 #endif /* ENOTSUP */
307 #ifdef EFTYPE
308                 /* fix broken NetBSD errno */
309                 if (errno == EFTYPE) {
310                         posix_errno = ELOOP;
311                 }
312 #endif /* EFTYPE */
313                 /* fix broken FreeBSD errno */
314                 if (errno == EMLINK) {
315                         posix_errno = ELOOP;
316                 }
317 #endif /* O_NOFOLLOW */
318                 status = map_nt_error_from_unix(posix_errno);
319                 if (errno == EMFILE) {
320                         static time_t last_warned = 0L;
321
322                         if (time((time_t *) NULL) > last_warned) {
323                                 DEBUG(0,("Too many open files, unable "
324                                         "to open more!  smbd's max "
325                                         "open files = %d\n",
326                                         lp_max_open_files()));
327                                 last_warned = time((time_t *) NULL);
328                         }
329                 }
330
331         }
332
333         DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
334                   smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
335                 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
336
337         return status;
338 }
339
340 /****************************************************************************
341  Close the file associated with a fsp.
342 ****************************************************************************/
343
344 NTSTATUS fd_close(files_struct *fsp)
345 {
346         int ret;
347
348         if (fsp->dptr) {
349                 dptr_CloseDir(fsp);
350         }
351         if (fsp->fh->fd == -1) {
352                 return NT_STATUS_OK; /* What we used to call a stat open. */
353         }
354         if (fsp->fh->ref_count > 1) {
355                 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
356         }
357
358         ret = SMB_VFS_CLOSE(fsp);
359         fsp->fh->fd = -1;
360         if (ret == -1) {
361                 return map_nt_error_from_unix(errno);
362         }
363         return NT_STATUS_OK;
364 }
365
366 /****************************************************************************
367  Change the ownership of a file to that of the parent directory.
368  Do this by fd if possible.
369 ****************************************************************************/
370
371 void change_file_owner_to_parent(connection_struct *conn,
372                                         const char *inherit_from_dir,
373                                         files_struct *fsp)
374 {
375         struct smb_filename *smb_fname_parent = NULL;
376         NTSTATUS status;
377         int ret;
378
379         status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
380                                             NULL, NULL, &smb_fname_parent);
381         if (!NT_STATUS_IS_OK(status)) {
382                 return;
383         }
384
385         ret = SMB_VFS_STAT(conn, smb_fname_parent);
386         if (ret == -1) {
387                 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
388                          "directory %s. Error was %s\n",
389                          smb_fname_str_dbg(smb_fname_parent),
390                          strerror(errno)));
391                 TALLOC_FREE(smb_fname_parent);
392                 return;
393         }
394
395         if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
396                 /* Already this uid - no need to change. */
397                 DEBUG(10,("change_file_owner_to_parent: file %s "
398                         "is already owned by uid %d\n",
399                         fsp_str_dbg(fsp),
400                         (int)fsp->fsp_name->st.st_ex_uid ));
401                 TALLOC_FREE(smb_fname_parent);
402                 return;
403         }
404
405         become_root();
406         ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
407         unbecome_root();
408         if (ret == -1) {
409                 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
410                          "file %s to parent directory uid %u. Error "
411                          "was %s\n", fsp_str_dbg(fsp),
412                          (unsigned int)smb_fname_parent->st.st_ex_uid,
413                          strerror(errno) ));
414         } else {
415                 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
416                         "parent directory uid %u.\n", fsp_str_dbg(fsp),
417                         (unsigned int)smb_fname_parent->st.st_ex_uid));
418                 /* Ensure the uid entry is updated. */
419                 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
420         }
421
422         TALLOC_FREE(smb_fname_parent);
423 }
424
425 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
426                                        const char *inherit_from_dir,
427                                        const char *fname,
428                                        SMB_STRUCT_STAT *psbuf)
429 {
430         struct smb_filename *smb_fname_parent = NULL;
431         struct smb_filename *smb_fname_cwd = NULL;
432         char *saved_dir = NULL;
433         TALLOC_CTX *ctx = talloc_tos();
434         NTSTATUS status = NT_STATUS_OK;
435         int ret;
436
437         status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
438                                             &smb_fname_parent);
439         if (!NT_STATUS_IS_OK(status)) {
440                 return status;
441         }
442
443         ret = SMB_VFS_STAT(conn, smb_fname_parent);
444         if (ret == -1) {
445                 status = map_nt_error_from_unix(errno);
446                 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
447                          "directory %s. Error was %s\n",
448                          smb_fname_str_dbg(smb_fname_parent),
449                          strerror(errno)));
450                 goto out;
451         }
452
453         /* We've already done an lstat into psbuf, and we know it's a
454            directory. If we can cd into the directory and the dev/ino
455            are the same then we can safely chown without races as
456            we're locking the directory in place by being in it.  This
457            should work on any UNIX (thanks tridge :-). JRA.
458         */
459
460         saved_dir = vfs_GetWd(ctx,conn);
461         if (!saved_dir) {
462                 status = map_nt_error_from_unix(errno);
463                 DEBUG(0,("change_dir_owner_to_parent: failed to get "
464                          "current working directory. Error was %s\n",
465                          strerror(errno)));
466                 goto out;
467         }
468
469         /* Chdir into the new path. */
470         if (vfs_ChDir(conn, fname) == -1) {
471                 status = map_nt_error_from_unix(errno);
472                 DEBUG(0,("change_dir_owner_to_parent: failed to change "
473                          "current working directory to %s. Error "
474                          "was %s\n", fname, strerror(errno) ));
475                 goto chdir;
476         }
477
478         status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
479                                             &smb_fname_cwd);
480         if (!NT_STATUS_IS_OK(status)) {
481                 return status;
482         }
483
484         ret = SMB_VFS_STAT(conn, smb_fname_cwd);
485         if (ret == -1) {
486                 status = map_nt_error_from_unix(errno);
487                 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
488                          "directory '.' (%s) Error was %s\n",
489                          fname, strerror(errno)));
490                 goto chdir;
491         }
492
493         /* Ensure we're pointing at the same place. */
494         if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
495             smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
496                 DEBUG(0,("change_dir_owner_to_parent: "
497                          "device/inode on directory %s changed. "
498                          "Refusing to chown !\n", fname ));
499                 status = NT_STATUS_ACCESS_DENIED;
500                 goto chdir;
501         }
502
503         if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
504                 /* Already this uid - no need to change. */
505                 DEBUG(10,("change_dir_owner_to_parent: directory %s "
506                         "is already owned by uid %d\n",
507                         fname,
508                         (int)smb_fname_cwd->st.st_ex_uid ));
509                 status = NT_STATUS_OK;
510                 goto chdir;
511         }
512
513         become_root();
514         ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
515                             (gid_t)-1);
516         unbecome_root();
517         if (ret == -1) {
518                 status = map_nt_error_from_unix(errno);
519                 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
520                           "directory %s to parent directory uid %u. "
521                           "Error was %s\n", fname,
522                           (unsigned int)smb_fname_parent->st.st_ex_uid,
523                           strerror(errno) ));
524         } else {
525                 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
526                         "directory %s to parent directory uid %u.\n",
527                         fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
528                 /* Ensure the uid entry is updated. */
529                 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
530         }
531
532  chdir:
533         vfs_ChDir(conn,saved_dir);
534  out:
535         TALLOC_FREE(smb_fname_parent);
536         TALLOC_FREE(smb_fname_cwd);
537         return status;
538 }
539
540 /****************************************************************************
541  Open a file - returning a guaranteed ATOMIC indication of if the
542  file was created or not.
543 ****************************************************************************/
544
545 static NTSTATUS fd_open_atomic(struct connection_struct *conn,
546                         files_struct *fsp,
547                         int flags,
548                         mode_t mode,
549                         bool *file_created)
550 {
551         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
552         bool file_existed = VALID_STAT(fsp->fsp_name->st);
553
554         *file_created = false;
555
556         if (!(flags & O_CREAT)) {
557                 /*
558                  * We're not creating the file, just pass through.
559                  */
560                 return fd_open(conn, fsp, flags, mode);
561         }
562
563         if (flags & O_EXCL) {
564                 /*
565                  * Fail if already exists, just pass through.
566                  */
567                 status = fd_open(conn, fsp, flags, mode);
568
569                 /*
570                  * Here we've opened with O_CREAT|O_EXCL. If that went
571                  * NT_STATUS_OK, we *know* we created this file.
572                  */
573                 *file_created = NT_STATUS_IS_OK(status);
574
575                 return status;
576         }
577
578         /*
579          * Now it gets tricky. We have O_CREAT, but not O_EXCL.
580          * To know absolutely if we created the file or not,
581          * we can never call O_CREAT without O_EXCL. So if
582          * we think the file existed, try without O_CREAT|O_EXCL.
583          * If we think the file didn't exist, try with
584          * O_CREAT|O_EXCL. Keep bouncing between these two
585          * requests until either the file is created, or
586          * opened. Either way, we keep going until we get
587          * a returnable result (error, or open/create).
588          */
589
590         while(1) {
591                 int curr_flags = flags;
592
593                 if (file_existed) {
594                         /* Just try open, do not create. */
595                         curr_flags &= ~(O_CREAT);
596                         status = fd_open(conn, fsp, curr_flags, mode);
597                         if (NT_STATUS_EQUAL(status,
598                                         NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
599                                 /*
600                                  * Someone deleted it in the meantime.
601                                  * Retry with O_EXCL.
602                                  */
603                                 file_existed = false;
604                                 DEBUG(10,("fd_open_atomic: file %s existed. "
605                                         "Retry.\n",
606                                         smb_fname_str_dbg(fsp->fsp_name)));
607                                         continue;
608                         }
609                 } else {
610                         /* Try create exclusively, fail if it exists. */
611                         curr_flags |= O_EXCL;
612                         status = fd_open(conn, fsp, curr_flags, mode);
613                         if (NT_STATUS_EQUAL(status,
614                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
615                                 /*
616                                  * Someone created it in the meantime.
617                                  * Retry without O_CREAT.
618                                  */
619                                 file_existed = true;
620                                 DEBUG(10,("fd_open_atomic: file %s "
621                                         "did not exist. Retry.\n",
622                                         smb_fname_str_dbg(fsp->fsp_name)));
623                                 continue;
624                         }
625                         if (NT_STATUS_IS_OK(status)) {
626                                 /*
627                                  * Here we've opened with O_CREAT|O_EXCL
628                                  * and got success. We *know* we created
629                                  * this file.
630                                  */
631                                 *file_created = true;
632                         }
633                 }
634                 /* Create is done, or failed. */
635                 break;
636         }
637         return status;
638 }
639
640 /****************************************************************************
641  Open a file.
642 ****************************************************************************/
643
644 static NTSTATUS open_file(files_struct *fsp,
645                           connection_struct *conn,
646                           struct smb_request *req,
647                           const char *parent_dir,
648                           int flags,
649                           mode_t unx_mode,
650                           uint32 access_mask, /* client requested access mask. */
651                           uint32 open_access_mask, /* what we're actually using in the open. */
652                           bool *p_file_created)
653 {
654         struct smb_filename *smb_fname = fsp->fsp_name;
655         NTSTATUS status = NT_STATUS_OK;
656         int accmode = (flags & O_ACCMODE);
657         int local_flags = flags;
658         bool file_existed = VALID_STAT(fsp->fsp_name->st);
659
660         fsp->fh->fd = -1;
661         errno = EPERM;
662
663         /* Check permissions */
664
665         /*
666          * This code was changed after seeing a client open request 
667          * containing the open mode of (DENY_WRITE/read-only) with
668          * the 'create if not exist' bit set. The previous code
669          * would fail to open the file read only on a read-only share
670          * as it was checking the flags parameter  directly against O_RDONLY,
671          * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
672          * JRA.
673          */
674
675         if (!CAN_WRITE(conn)) {
676                 /* It's a read-only share - fail if we wanted to write. */
677                 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
678                         DEBUG(3,("Permission denied opening %s\n",
679                                  smb_fname_str_dbg(smb_fname)));
680                         return NT_STATUS_ACCESS_DENIED;
681                 }
682                 if (flags & O_CREAT) {
683                         /* We don't want to write - but we must make sure that
684                            O_CREAT doesn't create the file if we have write
685                            access into the directory.
686                         */
687                         flags &= ~(O_CREAT|O_EXCL);
688                         local_flags &= ~(O_CREAT|O_EXCL);
689                 }
690         }
691
692         /*
693          * This little piece of insanity is inspired by the
694          * fact that an NT client can open a file for O_RDONLY,
695          * but set the create disposition to FILE_EXISTS_TRUNCATE.
696          * If the client *can* write to the file, then it expects to
697          * truncate the file, even though it is opening for readonly.
698          * Quicken uses this stupid trick in backup file creation...
699          * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
700          * for helping track this one down. It didn't bite us in 2.0.x
701          * as we always opened files read-write in that release. JRA.
702          */
703
704         if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
705                 DEBUG(10,("open_file: truncate requested on read-only open "
706                           "for file %s\n", smb_fname_str_dbg(smb_fname)));
707                 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
708         }
709
710         if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
711             (!file_existed && (local_flags & O_CREAT)) ||
712             ((local_flags & O_TRUNC) == O_TRUNC) ) {
713                 const char *wild;
714                 int ret;
715
716 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
717                 /*
718                  * We would block on opening a FIFO with no one else on the
719                  * other end. Do what we used to do and add O_NONBLOCK to the
720                  * open flags. JRA.
721                  */
722
723                 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
724                         local_flags &= ~O_TRUNC; /* Can't truncate a FIFO. */
725                         local_flags |= O_NONBLOCK;
726                 }
727 #endif
728
729                 /* Don't create files with Microsoft wildcard characters. */
730                 if (fsp->base_fsp) {
731                         /*
732                          * wildcard characters are allowed in stream names
733                          * only test the basefilename
734                          */
735                         wild = fsp->base_fsp->fsp_name->base_name;
736                 } else {
737                         wild = smb_fname->base_name;
738                 }
739                 if ((local_flags & O_CREAT) && !file_existed &&
740                     ms_has_wild(wild))  {
741                         return NT_STATUS_OBJECT_NAME_INVALID;
742                 }
743
744                 /* Can we access this file ? */
745                 if (!fsp->base_fsp) {
746                         /* Only do this check on non-stream open. */
747                         if (file_existed) {
748                                 status = smbd_check_access_rights(conn,
749                                                 smb_fname,
750                                                 false,
751                                                 access_mask);
752                         } else if (local_flags & O_CREAT){
753                                 status = check_parent_access(conn,
754                                                 smb_fname,
755                                                 SEC_DIR_ADD_FILE);
756                         } else {
757                                 /* File didn't exist and no O_CREAT. */
758                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
759                         }
760                         if (!NT_STATUS_IS_OK(status)) {
761                                 DEBUG(10,("open_file: "
762                                         "%s on file "
763                                         "%s returned %s\n",
764                                         file_existed ?
765                                                 "smbd_check_access_rights" :
766                                                 "check_parent_access",
767                                         smb_fname_str_dbg(smb_fname),
768                                         nt_errstr(status) ));
769                                 return status;
770                         }
771                 }
772
773                 /* Actually do the open */
774                 status = fd_open_atomic(conn, fsp, local_flags,
775                                 unx_mode, p_file_created);
776                 if (!NT_STATUS_IS_OK(status)) {
777                         DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
778                                  "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
779                                  nt_errstr(status),local_flags,flags));
780                         return status;
781                 }
782
783                 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
784                 if (ret == -1) {
785                         /* If we have an fd, this stat should succeed. */
786                         DEBUG(0,("Error doing fstat on open file %s "
787                                 "(%s)\n",
788                                 smb_fname_str_dbg(smb_fname),
789                                 strerror(errno) ));
790                         status = map_nt_error_from_unix(errno);
791                         fd_close(fsp);
792                         return status;
793                 }
794
795                 if (*p_file_created) {
796                         /* We created this file. */
797
798                         bool need_re_stat = false;
799                         /* Do all inheritance work after we've
800                            done a successful fstat call and filled
801                            in the stat struct in fsp->fsp_name. */
802
803                         /* Inherit the ACL if required */
804                         if (lp_inherit_perms(SNUM(conn))) {
805                                 inherit_access_posix_acl(conn, parent_dir,
806                                                          smb_fname->base_name,
807                                                          unx_mode);
808                                 need_re_stat = true;
809                         }
810
811                         /* Change the owner if required. */
812                         if (lp_inherit_owner(SNUM(conn))) {
813                                 change_file_owner_to_parent(conn, parent_dir,
814                                                             fsp);
815                                 need_re_stat = true;
816                         }
817
818                         if (need_re_stat) {
819                                 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
820                                 /* If we have an fd, this stat should succeed. */
821                                 if (ret == -1) {
822                                         DEBUG(0,("Error doing fstat on open file %s "
823                                                  "(%s)\n",
824                                                  smb_fname_str_dbg(smb_fname),
825                                                  strerror(errno) ));
826                                 }
827                         }
828
829                         notify_fname(conn, NOTIFY_ACTION_ADDED,
830                                      FILE_NOTIFY_CHANGE_FILE_NAME,
831                                      smb_fname->base_name);
832                 }
833         } else {
834                 fsp->fh->fd = -1; /* What we used to call a stat open. */
835                 if (!file_existed) {
836                         /* File must exist for a stat open. */
837                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
838                 }
839
840                 status = smbd_check_access_rights(conn,
841                                 smb_fname,
842                                 false,
843                                 access_mask);
844
845                 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
846                                 fsp->posix_open &&
847                                 S_ISLNK(smb_fname->st.st_ex_mode)) {
848                         /* This is a POSIX stat open for delete
849                          * or rename on a symlink that points
850                          * nowhere. Allow. */
851                         DEBUG(10,("open_file: allowing POSIX "
852                                   "open on bad symlink %s\n",
853                                   smb_fname_str_dbg(smb_fname)));
854                         status = NT_STATUS_OK;
855                 }
856
857                 if (!NT_STATUS_IS_OK(status)) {
858                         DEBUG(10,("open_file: "
859                                 "smbd_check_access_rights on file "
860                                 "%s returned %s\n",
861                                 smb_fname_str_dbg(smb_fname),
862                                 nt_errstr(status) ));
863                         return status;
864                 }
865         }
866
867         /*
868          * POSIX allows read-only opens of directories. We don't
869          * want to do this (we use a different code path for this)
870          * so catch a directory open and return an EISDIR. JRA.
871          */
872
873         if(S_ISDIR(smb_fname->st.st_ex_mode)) {
874                 fd_close(fsp);
875                 errno = EISDIR;
876                 return NT_STATUS_FILE_IS_A_DIRECTORY;
877         }
878
879         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
880         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
881         fsp->file_pid = req ? req->smbpid : 0;
882         fsp->can_lock = True;
883         fsp->can_read = ((access_mask & FILE_READ_DATA) != 0);
884         fsp->can_write =
885                 CAN_WRITE(conn) &&
886                 ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0);
887         fsp->print_file = NULL;
888         fsp->modified = False;
889         fsp->sent_oplock_break = NO_BREAK_SENT;
890         fsp->is_directory = False;
891         if (conn->aio_write_behind_list &&
892             is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
893                        conn->case_sensitive)) {
894                 fsp->aio_write_behind = True;
895         }
896
897         fsp->wcp = NULL; /* Write cache pointer. */
898
899         DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
900                  conn->session_info->unix_info->unix_name,
901                  smb_fname_str_dbg(smb_fname),
902                  BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
903                  conn->num_files_open));
904
905         errno = 0;
906         return NT_STATUS_OK;
907 }
908
909 /****************************************************************************
910  Check if we can open a file with a share mode.
911  Returns True if conflict, False if not.
912 ****************************************************************************/
913
914 static bool share_conflict(struct share_mode_entry *entry,
915                            uint32 access_mask,
916                            uint32 share_access)
917 {
918         DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
919                   "entry->share_access = 0x%x, "
920                   "entry->private_options = 0x%x\n",
921                   (unsigned int)entry->access_mask,
922                   (unsigned int)entry->share_access,
923                   (unsigned int)entry->private_options));
924
925         if (server_id_is_disconnected(&entry->pid)) {
926                 /*
927                  * note: cleanup should have been done by
928                  * delay_for_batch_oplocks()
929                  */
930                 return false;
931         }
932
933         DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
934                   (unsigned int)access_mask, (unsigned int)share_access));
935
936         if ((entry->access_mask & (FILE_WRITE_DATA|
937                                    FILE_APPEND_DATA|
938                                    FILE_READ_DATA|
939                                    FILE_EXECUTE|
940                                    DELETE_ACCESS)) == 0) {
941                 DEBUG(10,("share_conflict: No conflict due to "
942                           "entry->access_mask = 0x%x\n",
943                           (unsigned int)entry->access_mask ));
944                 return False;
945         }
946
947         if ((access_mask & (FILE_WRITE_DATA|
948                             FILE_APPEND_DATA|
949                             FILE_READ_DATA|
950                             FILE_EXECUTE|
951                             DELETE_ACCESS)) == 0) {
952                 DEBUG(10,("share_conflict: No conflict due to "
953                           "access_mask = 0x%x\n",
954                           (unsigned int)access_mask ));
955                 return False;
956         }
957
958 #if 1 /* JRA TEST - Superdebug. */
959 #define CHECK_MASK(num, am, right, sa, share) \
960         DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
961                 (unsigned int)(num), (unsigned int)(am), \
962                 (unsigned int)(right), (unsigned int)(am)&(right) )); \
963         DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
964                 (unsigned int)(num), (unsigned int)(sa), \
965                 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
966         if (((am) & (right)) && !((sa) & (share))) { \
967                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
968 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
969                         (unsigned int)(share) )); \
970                 return True; \
971         }
972 #else
973 #define CHECK_MASK(num, am, right, sa, share) \
974         if (((am) & (right)) && !((sa) & (share))) { \
975                 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
976 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
977                         (unsigned int)(share) )); \
978                 return True; \
979         }
980 #endif
981
982         CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
983                    share_access, FILE_SHARE_WRITE);
984         CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
985                    entry->share_access, FILE_SHARE_WRITE);
986
987         CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
988                    share_access, FILE_SHARE_READ);
989         CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
990                    entry->share_access, FILE_SHARE_READ);
991
992         CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
993                    share_access, FILE_SHARE_DELETE);
994         CHECK_MASK(6, access_mask, DELETE_ACCESS,
995                    entry->share_access, FILE_SHARE_DELETE);
996
997         DEBUG(10,("share_conflict: No conflict.\n"));
998         return False;
999 }
1000
1001 #if defined(DEVELOPER)
1002 static void validate_my_share_entries(struct smbd_server_connection *sconn,
1003                                       int num,
1004                                       struct share_mode_entry *share_entry)
1005 {
1006         struct server_id self = messaging_server_id(sconn->msg_ctx);
1007         files_struct *fsp;
1008
1009         if (!serverid_equal(&self, &share_entry->pid)) {
1010                 return;
1011         }
1012
1013         if (is_deferred_open_entry(share_entry) &&
1014             !open_was_deferred(sconn, share_entry->op_mid)) {
1015                 char *str = talloc_asprintf(talloc_tos(),
1016                         "Got a deferred entry without a request: "
1017                         "PANIC: %s\n",
1018                         share_mode_str(talloc_tos(), num, share_entry));
1019                 smb_panic(str);
1020         }
1021
1022         if (!is_valid_share_mode_entry(share_entry)) {
1023                 return;
1024         }
1025
1026         fsp = file_find_dif(sconn, share_entry->id,
1027                             share_entry->share_file_id);
1028         if (!fsp) {
1029                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1030                          share_mode_str(talloc_tos(), num, share_entry) ));
1031                 smb_panic("validate_my_share_entries: Cannot match a "
1032                           "share entry with an open file\n");
1033         }
1034
1035         if (is_deferred_open_entry(share_entry)) {
1036                 goto panic;
1037         }
1038
1039         if ((share_entry->op_type == NO_OPLOCK) &&
1040             (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
1041                 /* Someone has already written to it, but I haven't yet
1042                  * noticed */
1043                 return;
1044         }
1045
1046         if (((uint16)fsp->oplock_type) != share_entry->op_type) {
1047                 goto panic;
1048         }
1049
1050         return;
1051
1052  panic:
1053         {
1054                 char *str;
1055                 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1056                          share_mode_str(talloc_tos(), num, share_entry) ));
1057                 str = talloc_asprintf(talloc_tos(),
1058                         "validate_my_share_entries: "
1059                         "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
1060                          fsp->fsp_name->base_name,
1061                          (unsigned int)fsp->oplock_type,
1062                          (unsigned int)share_entry->op_type );
1063                 smb_panic(str);
1064         }
1065 }
1066 #endif
1067
1068 bool is_stat_open(uint32 access_mask)
1069 {
1070         const uint32_t stat_open_bits =
1071                 (SYNCHRONIZE_ACCESS|
1072                  FILE_READ_ATTRIBUTES|
1073                  FILE_WRITE_ATTRIBUTES);
1074
1075         return (((access_mask &  stat_open_bits) != 0) &&
1076                 ((access_mask & ~stat_open_bits) == 0));
1077 }
1078
1079 /****************************************************************************
1080  Deal with share modes
1081  Invarient: Share mode must be locked on entry and exit.
1082  Returns -1 on error, or number of share modes on success (may be zero).
1083 ****************************************************************************/
1084
1085 static NTSTATUS open_mode_check(connection_struct *conn,
1086                                 struct share_mode_lock *lck,
1087                                 uint32_t name_hash,
1088                                 uint32 access_mask,
1089                                 uint32 share_access,
1090                                 uint32 create_options,
1091                                 bool *file_existed)
1092 {
1093         int i;
1094
1095         if(lck->data->num_share_modes == 0) {
1096                 return NT_STATUS_OK;
1097         }
1098
1099         /* A delete on close prohibits everything */
1100
1101         if (is_delete_on_close_set(lck, name_hash)) {
1102                 /*
1103                  * Check the delete on close token
1104                  * is valid. It could have been left
1105                  * after a server crash.
1106                  */
1107                 for(i = 0; i < lck->data->num_share_modes; i++) {
1108                         if (!share_mode_stale_pid(lck->data, i)) {
1109
1110                                 *file_existed = true;
1111
1112                                 return NT_STATUS_DELETE_PENDING;
1113                         }
1114                 }
1115                 return NT_STATUS_OK;
1116         }
1117
1118         if (is_stat_open(access_mask)) {
1119                 /* Stat open that doesn't trigger oplock breaks or share mode
1120                  * checks... ! JRA. */
1121                 return NT_STATUS_OK;
1122         }
1123
1124         /*
1125          * Check if the share modes will give us access.
1126          */
1127
1128 #if defined(DEVELOPER)
1129         for(i = 0; i < lck->data->num_share_modes; i++) {
1130                 validate_my_share_entries(conn->sconn, i,
1131                                           &lck->data->share_modes[i]);
1132         }
1133 #endif
1134
1135         /* Now we check the share modes, after any oplock breaks. */
1136         for(i = 0; i < lck->data->num_share_modes; i++) {
1137
1138                 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1139                         continue;
1140                 }
1141
1142                 /* someone else has a share lock on it, check to see if we can
1143                  * too */
1144                 if (share_conflict(&lck->data->share_modes[i],
1145                                    access_mask, share_access)) {
1146
1147                         if (share_mode_stale_pid(lck->data, i)) {
1148                                 continue;
1149                         }
1150
1151                         *file_existed = true;
1152
1153                         return NT_STATUS_SHARING_VIOLATION;
1154                 }
1155         }
1156
1157         if (lck->data->num_share_modes != 0) {
1158                 *file_existed = true;
1159         }
1160
1161         return NT_STATUS_OK;
1162 }
1163
1164 /*
1165  * Send a break message to the oplock holder and delay the open for
1166  * our client.
1167  */
1168
1169 static NTSTATUS send_break_message(files_struct *fsp,
1170                                         struct share_mode_entry *exclusive,
1171                                         uint64_t mid,
1172                                         int oplock_request)
1173 {
1174         NTSTATUS status;
1175         char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1176
1177         DEBUG(10, ("Sending break request to PID %s\n",
1178                    procid_str_static(&exclusive->pid)));
1179         exclusive->op_mid = mid;
1180
1181         /* Create the message. */
1182         share_mode_entry_to_message(msg, exclusive);
1183
1184         /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1185            don't want this set in the share mode struct pointed to by lck. */
1186
1187         if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1188                 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1189                         exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1190         }
1191
1192         status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1193                                     MSG_SMB_BREAK_REQUEST,
1194                                     (uint8 *)msg,
1195                                     MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1196         if (!NT_STATUS_IS_OK(status)) {
1197                 DEBUG(3, ("Could not send oplock break message: %s\n",
1198                           nt_errstr(status)));
1199         }
1200
1201         return status;
1202 }
1203
1204 /*
1205  * Return share_mode_entry pointers for :
1206  * 1). Batch oplock entry.
1207  * 2). Batch or exclusive oplock entry (may be identical to #1).
1208  * bool have_level2_oplock
1209  * bool have_no_oplock.
1210  * Do internal consistency checks on the share mode for a file.
1211  */
1212
1213 static void find_oplock_types(files_struct *fsp,
1214                                 int oplock_request,
1215                                 const struct share_mode_lock *lck,
1216                                 struct share_mode_entry **pp_batch,
1217                                 struct share_mode_entry **pp_ex_or_batch,
1218                                 bool *got_level2,
1219                                 bool *got_no_oplock)
1220 {
1221         int i;
1222
1223         *pp_batch = NULL;
1224         *pp_ex_or_batch = NULL;
1225         *got_level2 = false;
1226         *got_no_oplock = false;
1227
1228         /* Ignore stat or internal opens, as is done in
1229                 delay_for_batch_oplocks() and
1230                 delay_for_exclusive_oplocks().
1231          */
1232         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1233                 return;
1234         }
1235
1236         for (i=0; i<lck->data->num_share_modes; i++) {
1237                 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1238                         continue;
1239                 }
1240
1241                 if (lck->data->share_modes[i].op_type == NO_OPLOCK &&
1242                                 is_stat_open(lck->data->share_modes[i].access_mask)) {
1243                         /* We ignore stat opens in the table - they
1244                            always have NO_OPLOCK and never get or
1245                            cause breaks. JRA. */
1246                         continue;
1247                 }
1248
1249                 if (BATCH_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1250                         /* batch - can only be one. */
1251                         if (share_mode_stale_pid(lck->data, i)) {
1252                                 DEBUG(10, ("Found stale batch oplock\n"));
1253                                 continue;
1254                         }
1255                         if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1256                                 smb_panic("Bad batch oplock entry.");
1257                         }
1258                         *pp_batch = &lck->data->share_modes[i];
1259                 }
1260
1261                 if (EXCLUSIVE_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1262                         if (share_mode_stale_pid(lck->data, i)) {
1263                                 DEBUG(10, ("Found stale duplicate oplock\n"));
1264                                 continue;
1265                         }
1266                         /* Exclusive or batch - can only be one. */
1267                         if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1268                                 smb_panic("Bad exclusive or batch oplock entry.");
1269                         }
1270                         *pp_ex_or_batch = &lck->data->share_modes[i];
1271                 }
1272
1273                 if (LEVEL_II_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1274                         if (*pp_batch || *pp_ex_or_batch) {
1275                                 if (share_mode_stale_pid(lck->data, i)) {
1276                                         DEBUG(10, ("Found stale LevelII "
1277                                                    "oplock\n"));
1278                                         continue;
1279                                 }
1280                                 smb_panic("Bad levelII oplock entry.");
1281                         }
1282                         *got_level2 = true;
1283                 }
1284
1285                 if (lck->data->share_modes[i].op_type == NO_OPLOCK) {
1286                         if (*pp_batch || *pp_ex_or_batch) {
1287                                 if (share_mode_stale_pid(lck->data, i)) {
1288                                         DEBUG(10, ("Found stale NO_OPLOCK "
1289                                                    "entry\n"));
1290                                         continue;
1291                                 }
1292                                 smb_panic("Bad no oplock entry.");
1293                         }
1294                         *got_no_oplock = true;
1295                 }
1296         }
1297 }
1298
1299 static bool delay_for_batch_oplocks(files_struct *fsp,
1300                                         uint64_t mid,
1301                                         int oplock_request,
1302                                         struct share_mode_entry *batch_entry)
1303 {
1304         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1305                 return false;
1306         }
1307         if (batch_entry == NULL) {
1308                 return false;
1309         }
1310
1311         if (server_id_is_disconnected(&batch_entry->pid)) {
1312                 /*
1313                  * TODO: clean up.
1314                  * This could be achieved by sending a break message
1315                  * to ourselves. Special considerations for files
1316                  * with delete_on_close flag set!
1317                  *
1318                  * For now we keep it simple and do not
1319                  * allow delete on close for durable handles.
1320                  */
1321                 return false;
1322         }
1323
1324         /* Found a batch oplock */
1325         send_break_message(fsp, batch_entry, mid, oplock_request);
1326         return true;
1327 }
1328
1329 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1330                                         uint64_t mid,
1331                                         int oplock_request,
1332                                         struct share_mode_entry *ex_entry)
1333 {
1334         if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1335                 return false;
1336         }
1337         if (ex_entry == NULL) {
1338                 return false;
1339         }
1340
1341         if (server_id_is_disconnected(&ex_entry->pid)) {
1342                 /*
1343                  * since only durable handles can get disconnected,
1344                  * and we can only get durable handles with batch oplocks,
1345                  * this should actually never be reached...
1346                  */
1347                 return false;
1348         }
1349
1350         send_break_message(fsp, ex_entry, mid, oplock_request);
1351         return true;
1352 }
1353
1354 static bool file_has_brlocks(files_struct *fsp)
1355 {
1356         struct byte_range_lock *br_lck;
1357
1358         br_lck = brl_get_locks_readonly(fsp);
1359         if (!br_lck)
1360                 return false;
1361
1362         return br_lck->num_locks > 0 ? true : false;
1363 }
1364
1365 static void grant_fsp_oplock_type(files_struct *fsp,
1366                                 int oplock_request,
1367                                 bool got_level2_oplock,
1368                                 bool got_a_none_oplock)
1369 {
1370         bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1371                             lp_level2_oplocks(SNUM(fsp->conn));
1372
1373         /* Start by granting what the client asked for,
1374            but ensure no SAMBA_PRIVATE bits can be set. */
1375         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1376
1377         if (oplock_request & INTERNAL_OPEN_ONLY) {
1378                 /* No oplocks on internal open. */
1379                 fsp->oplock_type = NO_OPLOCK;
1380                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1381                         fsp->oplock_type, fsp_str_dbg(fsp)));
1382                 return;
1383         }
1384
1385         if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1386                 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1387                         fsp_str_dbg(fsp)));
1388                 fsp->oplock_type = NO_OPLOCK;
1389         }
1390
1391         if (is_stat_open(fsp->access_mask)) {
1392                 /* Leave the value already set. */
1393                 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1394                         fsp->oplock_type, fsp_str_dbg(fsp)));
1395                 return;
1396         }
1397
1398         /*
1399          * Match what was requested (fsp->oplock_type) with
1400          * what was found in the existing share modes.
1401          */
1402
1403         if (got_a_none_oplock) {
1404                 fsp->oplock_type = NO_OPLOCK;
1405         } else if (got_level2_oplock) {
1406                 if (fsp->oplock_type == NO_OPLOCK ||
1407                                 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1408                         /* Store a level2 oplock, but don't tell the client */
1409                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1410                 } else {
1411                         fsp->oplock_type = LEVEL_II_OPLOCK;
1412                 }
1413         } else {
1414                 /* All share_mode_entries are placeholders or deferred.
1415                  * Silently upgrade to fake levelII if the client didn't
1416                  * ask for an oplock. */
1417                 if (fsp->oplock_type == NO_OPLOCK) {
1418                         /* Store a level2 oplock, but don't tell the client */
1419                         fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1420                 }
1421         }
1422
1423         /*
1424          * Don't grant level2 to clients that don't want them
1425          * or if we've turned them off.
1426          */
1427         if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1428                 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1429         }
1430
1431         DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1432                   fsp->oplock_type, fsp_str_dbg(fsp)));
1433 }
1434
1435 static bool request_timed_out(struct timeval request_time,
1436                               struct timeval timeout)
1437 {
1438         struct timeval now, end_time;
1439         GetTimeOfDay(&now);
1440         end_time = timeval_sum(&request_time, &timeout);
1441         return (timeval_compare(&end_time, &now) < 0);
1442 }
1443
1444 /****************************************************************************
1445  Handle the 1 second delay in returning a SHARING_VIOLATION error.
1446 ****************************************************************************/
1447
1448 static void defer_open(struct share_mode_lock *lck,
1449                        struct timeval request_time,
1450                        struct timeval timeout,
1451                        struct smb_request *req,
1452                        struct deferred_open_record *state)
1453 {
1454         struct server_id self = messaging_server_id(req->sconn->msg_ctx);
1455
1456         /* Paranoia check */
1457
1458         if (lck) {
1459                 int i;
1460
1461                 for (i=0; i<lck->data->num_share_modes; i++) {
1462                         struct share_mode_entry *e = &lck->data->share_modes[i];
1463
1464                         if (is_deferred_open_entry(e) &&
1465                             serverid_equal(&self, &e->pid) &&
1466                             (e->op_mid == req->mid)) {
1467                                 DEBUG(0, ("Trying to defer an already deferred "
1468                                         "request: mid=%llu, exiting\n",
1469                                         (unsigned long long)req->mid));
1470                                 TALLOC_FREE(lck);
1471                                 exit_server("attempt to defer a deferred request");
1472                         }
1473                 }
1474         }
1475
1476         /* End paranoia check */
1477
1478         DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1479                   "open entry for mid %llu\n",
1480                   (unsigned int)request_time.tv_sec,
1481                   (unsigned int)request_time.tv_usec,
1482                   (unsigned long long)req->mid));
1483
1484         if (!push_deferred_open_message_smb(req, request_time, timeout,
1485                                        state->id, (char *)state, sizeof(*state))) {
1486                 TALLOC_FREE(lck);
1487                 exit_server("push_deferred_open_message_smb failed");
1488         }
1489         if (lck) {
1490                 add_deferred_open(lck, req->mid, request_time, self, state->id);
1491         }
1492 }
1493
1494
1495 /****************************************************************************
1496  On overwrite open ensure that the attributes match.
1497 ****************************************************************************/
1498
1499 static bool open_match_attributes(connection_struct *conn,
1500                                   uint32 old_dos_attr,
1501                                   uint32 new_dos_attr,
1502                                   mode_t existing_unx_mode,
1503                                   mode_t new_unx_mode,
1504                                   mode_t *returned_unx_mode)
1505 {
1506         uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1507
1508         noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1509         noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1510
1511         if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) || 
1512            (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1513                 *returned_unx_mode = new_unx_mode;
1514         } else {
1515                 *returned_unx_mode = (mode_t)0;
1516         }
1517
1518         DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1519                   "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1520                   "returned_unx_mode = 0%o\n",
1521                   (unsigned int)old_dos_attr,
1522                   (unsigned int)existing_unx_mode,
1523                   (unsigned int)new_dos_attr,
1524                   (unsigned int)*returned_unx_mode ));
1525
1526         /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1527         if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1528                 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1529                     !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1530                         return False;
1531                 }
1532         }
1533         if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1534                 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1535                     !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1536                         return False;
1537                 }
1538         }
1539         return True;
1540 }
1541
1542 /****************************************************************************
1543  Special FCB or DOS processing in the case of a sharing violation.
1544  Try and find a duplicated file handle.
1545 ****************************************************************************/
1546
1547 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
1548                                 connection_struct *conn,
1549                                 files_struct *fsp_to_dup_into,
1550                                 const struct smb_filename *smb_fname,
1551                                 struct file_id id,
1552                                 uint16 file_pid,
1553                                 uint64_t vuid,
1554                                 uint32 access_mask,
1555                                 uint32 share_access,
1556                                 uint32 create_options)
1557 {
1558         files_struct *fsp;
1559
1560         DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1561                  "file %s.\n", smb_fname_str_dbg(smb_fname)));
1562
1563         for(fsp = file_find_di_first(conn->sconn, id); fsp;
1564             fsp = file_find_di_next(fsp)) {
1565
1566                 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1567                           "vuid = %llu, file_pid = %u, private_options = 0x%x "
1568                           "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1569                           fsp->fh->fd, (unsigned long long)fsp->vuid,
1570                           (unsigned int)fsp->file_pid,
1571                           (unsigned int)fsp->fh->private_options,
1572                           (unsigned int)fsp->access_mask ));
1573
1574                 if (fsp != fsp_to_dup_into &&
1575                     fsp->fh->fd != -1 &&
1576                     fsp->vuid == vuid &&
1577                     fsp->file_pid == file_pid &&
1578                     (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1579                                                  NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1580                     (fsp->access_mask & FILE_WRITE_DATA) &&
1581                     strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1582                     strequal(fsp->fsp_name->stream_name,
1583                              smb_fname->stream_name)) {
1584                         DEBUG(10,("fcb_or_dos_open: file match\n"));
1585                         break;
1586                 }
1587         }
1588
1589         if (!fsp) {
1590                 return NT_STATUS_NOT_FOUND;
1591         }
1592
1593         /* quite an insane set of semantics ... */
1594         if (is_executable(smb_fname->base_name) &&
1595             (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1596                 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1597                 return NT_STATUS_INVALID_PARAMETER;
1598         }
1599
1600         /* We need to duplicate this fsp. */
1601         return dup_file_fsp(req, fsp, access_mask, share_access,
1602                             create_options, fsp_to_dup_into);
1603 }
1604
1605 static void schedule_defer_open(struct share_mode_lock *lck,
1606                                 struct timeval request_time,
1607                                 struct smb_request *req)
1608 {
1609         struct deferred_open_record state;
1610
1611         /* This is a relative time, added to the absolute
1612            request_time value to get the absolute timeout time.
1613            Note that if this is the second or greater time we enter
1614            this codepath for this particular request mid then
1615            request_time is left as the absolute time of the *first*
1616            time this request mid was processed. This is what allows
1617            the request to eventually time out. */
1618
1619         struct timeval timeout;
1620
1621         /* Normally the smbd we asked should respond within
1622          * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1623          * the client did, give twice the timeout as a safety
1624          * measure here in case the other smbd is stuck
1625          * somewhere else. */
1626
1627         timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1628
1629         /* Nothing actually uses state.delayed_for_oplocks
1630            but it's handy to differentiate in debug messages
1631            between a 30 second delay due to oplock break, and
1632            a 1 second delay for share mode conflicts. */
1633
1634         state.delayed_for_oplocks = True;
1635         state.async_open = false;
1636         state.id = lck->data->id;
1637
1638         if (!request_timed_out(request_time, timeout)) {
1639                 defer_open(lck, request_time, timeout, req, &state);
1640         }
1641 }
1642
1643 /****************************************************************************
1644  Reschedule an open call that went asynchronous.
1645 ****************************************************************************/
1646
1647 static void schedule_async_open(struct timeval request_time,
1648                                 struct smb_request *req)
1649 {
1650         struct deferred_open_record state;
1651         struct timeval timeout;
1652
1653         timeout = timeval_set(20, 0);
1654
1655         ZERO_STRUCT(state);
1656         state.delayed_for_oplocks = false;
1657         state.async_open = true;
1658
1659         if (!request_timed_out(request_time, timeout)) {
1660                 defer_open(NULL, request_time, timeout, req, &state);
1661         }
1662 }
1663
1664 /****************************************************************************
1665  Work out what access_mask to use from what the client sent us.
1666 ****************************************************************************/
1667
1668 static NTSTATUS smbd_calculate_maximum_allowed_access(
1669         connection_struct *conn,
1670         const struct smb_filename *smb_fname,
1671         bool use_privs,
1672         uint32_t *p_access_mask)
1673 {
1674         struct security_descriptor *sd;
1675         uint32_t access_granted;
1676         NTSTATUS status;
1677
1678         if (!use_privs && (get_current_uid(conn) == (uid_t)0)) {
1679                 *p_access_mask |= FILE_GENERIC_ALL;
1680                 return NT_STATUS_OK;
1681         }
1682
1683         status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1684                                     (SECINFO_OWNER |
1685                                      SECINFO_GROUP |
1686                                      SECINFO_DACL),&sd);
1687
1688         if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1689                 /*
1690                  * File did not exist
1691                  */
1692                 *p_access_mask = FILE_GENERIC_ALL;
1693                 return NT_STATUS_OK;
1694         }
1695         if (!NT_STATUS_IS_OK(status)) {
1696                 DEBUG(10,("Could not get acl on file %s: %s\n",
1697                           smb_fname_str_dbg(smb_fname),
1698                           nt_errstr(status)));
1699                 return NT_STATUS_ACCESS_DENIED;
1700         }
1701
1702         /*
1703          * Never test FILE_READ_ATTRIBUTES. se_file_access_check()
1704          * also takes care of owner WRITE_DAC and READ_CONTROL.
1705          */
1706         status = se_file_access_check(sd,
1707                                  get_current_nttok(conn),
1708                                  use_privs,
1709                                  (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1710                                  &access_granted);
1711
1712         TALLOC_FREE(sd);
1713
1714         if (!NT_STATUS_IS_OK(status)) {
1715                 DEBUG(10, ("Access denied on file %s: "
1716                            "when calculating maximum access\n",
1717                            smb_fname_str_dbg(smb_fname)));
1718                 return NT_STATUS_ACCESS_DENIED;
1719         }
1720         *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1721
1722         if (!(access_granted & DELETE_ACCESS)) {
1723                 if (can_delete_file_in_directory(conn, smb_fname)) {
1724                         *p_access_mask |= DELETE_ACCESS;
1725                 }
1726         }
1727
1728         return NT_STATUS_OK;
1729 }
1730
1731 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1732                                     const struct smb_filename *smb_fname,
1733                                     bool use_privs,
1734                                     uint32_t access_mask,
1735                                     uint32_t *access_mask_out)
1736 {
1737         NTSTATUS status;
1738         uint32_t orig_access_mask = access_mask;
1739         uint32_t rejected_share_access;
1740
1741         /*
1742          * Convert GENERIC bits to specific bits.
1743          */
1744
1745         se_map_generic(&access_mask, &file_generic_mapping);
1746
1747         /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1748         if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1749
1750                 status = smbd_calculate_maximum_allowed_access(
1751                         conn, smb_fname, use_privs, &access_mask);
1752
1753                 if (!NT_STATUS_IS_OK(status)) {
1754                         return status;
1755                 }
1756
1757                 access_mask &= conn->share_access;
1758         }
1759
1760         rejected_share_access = access_mask & ~(conn->share_access);
1761
1762         if (rejected_share_access) {
1763                 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1764                         "file %s: rejected by share access mask[0x%08X] "
1765                         "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1766                         smb_fname_str_dbg(smb_fname),
1767                         conn->share_access,
1768                         orig_access_mask, access_mask,
1769                         rejected_share_access));
1770                 return NT_STATUS_ACCESS_DENIED;
1771         }
1772
1773         *access_mask_out = access_mask;
1774         return NT_STATUS_OK;
1775 }
1776
1777 /****************************************************************************
1778  Remove the deferred open entry under lock.
1779 ****************************************************************************/
1780
1781 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1782                                 struct server_id pid)
1783 {
1784         struct share_mode_lock *lck = get_existing_share_mode_lock(
1785                 talloc_tos(), id);
1786         if (lck == NULL) {
1787                 DEBUG(0, ("could not get share mode lock\n"));
1788                 return;
1789         }
1790         del_deferred_open_entry(lck, mid, pid);
1791         TALLOC_FREE(lck);
1792 }
1793
1794 /****************************************************************************
1795  Return true if this is a state pointer to an asynchronous create.
1796 ****************************************************************************/
1797
1798 bool is_deferred_open_async(const void *ptr)
1799 {
1800         const struct deferred_open_record *state = (const struct deferred_open_record *)ptr;
1801
1802         return state->async_open;
1803 }
1804
1805 static bool clear_ads(uint32_t create_disposition)
1806 {
1807         bool ret = false;
1808
1809         switch (create_disposition) {
1810         case FILE_SUPERSEDE:
1811         case FILE_OVERWRITE_IF:
1812         case FILE_OVERWRITE:
1813                 ret = true;
1814                 break;
1815         default:
1816                 break;
1817         }
1818         return ret;
1819 }
1820
1821 static int disposition_to_open_flags(uint32_t create_disposition)
1822 {
1823         int ret = 0;
1824
1825         /*
1826          * Currently we're using FILE_SUPERSEDE as the same as
1827          * FILE_OVERWRITE_IF but they really are
1828          * different. FILE_SUPERSEDE deletes an existing file
1829          * (requiring delete access) then recreates it.
1830          */
1831
1832         switch (create_disposition) {
1833         case FILE_SUPERSEDE:
1834         case FILE_OVERWRITE_IF:
1835                 /*
1836                  * If file exists replace/overwrite. If file doesn't
1837                  * exist create.
1838                  */
1839                 ret = O_CREAT|O_TRUNC;
1840                 break;
1841
1842         case FILE_OPEN:
1843                 /*
1844                  * If file exists open. If file doesn't exist error.
1845                  */
1846                 ret = 0;
1847                 break;
1848
1849         case FILE_OVERWRITE:
1850                 /*
1851                  * If file exists overwrite. If file doesn't exist
1852                  * error.
1853                  */
1854                 ret = O_TRUNC;
1855                 break;
1856
1857         case FILE_CREATE:
1858                 /*
1859                  * If file exists error. If file doesn't exist create.
1860                  */
1861                 ret = O_CREAT|O_EXCL;
1862                 break;
1863
1864         case FILE_OPEN_IF:
1865                 /*
1866                  * If file exists open. If file doesn't exist create.
1867                  */
1868                 ret = O_CREAT;
1869                 break;
1870         }
1871         return ret;
1872 }
1873
1874 static int calculate_open_access_flags(uint32_t access_mask,
1875                                        int oplock_request,
1876                                        uint32_t private_flags)
1877 {
1878         bool need_write, need_read;
1879
1880         /*
1881          * Note that we ignore the append flag as append does not
1882          * mean the same thing under DOS and Unix.
1883          */
1884
1885         need_write =
1886                 ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1887                  (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE));
1888
1889         if (!need_write) {
1890                 return O_RDONLY;
1891         }
1892
1893         /* DENY_DOS opens are always underlying read-write on the
1894            file handle, no matter what the requested access mask
1895            says. */
1896
1897         need_read =
1898                 ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1899                  access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|
1900                                 FILE_READ_EA|FILE_EXECUTE));
1901
1902         if (!need_read) {
1903                 return O_WRONLY;
1904         }
1905         return O_RDWR;
1906 }
1907
1908 /****************************************************************************
1909  Open a file with a share mode. Passed in an already created files_struct *.
1910 ****************************************************************************/
1911
1912 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1913                             struct smb_request *req,
1914                             uint32 access_mask,         /* access bits (FILE_READ_DATA etc.) */
1915                             uint32 share_access,        /* share constants (FILE_SHARE_READ etc) */
1916                             uint32 create_disposition,  /* FILE_OPEN_IF etc. */
1917                             uint32 create_options,      /* options such as delete on close. */
1918                             uint32 new_dos_attributes,  /* attributes used for new file. */
1919                             int oplock_request,         /* internal Samba oplock codes. */
1920                                                         /* Information (FILE_EXISTS etc.) */
1921                             uint32_t private_flags,     /* Samba specific flags. */
1922                             int *pinfo,
1923                             files_struct *fsp)
1924 {
1925         struct smb_filename *smb_fname = fsp->fsp_name;
1926         int flags=0;
1927         int flags2=0;
1928         bool file_existed = VALID_STAT(smb_fname->st);
1929         bool def_acl = False;
1930         bool posix_open = False;
1931         bool new_file_created = False;
1932         NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1933         mode_t new_unx_mode = (mode_t)0;
1934         mode_t unx_mode = (mode_t)0;
1935         int info;
1936         uint32 existing_dos_attributes = 0;
1937         struct timeval request_time = timeval_zero();
1938         struct share_mode_lock *lck = NULL;
1939         uint32 open_access_mask = access_mask;
1940         NTSTATUS status;
1941         char *parent_dir;
1942         SMB_STRUCT_STAT saved_stat = smb_fname->st;
1943         struct share_mode_entry *batch_entry = NULL;
1944         struct share_mode_entry *exclusive_entry = NULL;
1945         bool got_level2_oplock = false;
1946         bool got_a_none_oplock = false;
1947         struct timespec old_write_time;
1948         struct file_id id;
1949
1950         if (conn->printer) {
1951                 /*
1952                  * Printers are handled completely differently.
1953                  * Most of the passed parameters are ignored.
1954                  */
1955
1956                 if (pinfo) {
1957                         *pinfo = FILE_WAS_CREATED;
1958                 }
1959
1960                 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1961                            smb_fname_str_dbg(smb_fname)));
1962
1963                 if (!req) {
1964                         DEBUG(0,("open_file_ntcreate: printer open without "
1965                                 "an SMB request!\n"));
1966                         return NT_STATUS_INTERNAL_ERROR;
1967                 }
1968
1969                 return print_spool_open(fsp, smb_fname->base_name,
1970                                         req->vuid);
1971         }
1972
1973         if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1974                             NULL)) {
1975                 return NT_STATUS_NO_MEMORY;
1976         }
1977
1978         if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1979                 posix_open = True;
1980                 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1981                 new_dos_attributes = 0;
1982         } else {
1983                 /* Windows allows a new file to be created and
1984                    silently removes a FILE_ATTRIBUTE_DIRECTORY
1985                    sent by the client. Do the same. */
1986
1987                 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1988
1989                 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1990                  * created new. */
1991                 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1992                                      smb_fname, parent_dir);
1993         }
1994
1995         DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1996                    "access_mask=0x%x share_access=0x%x "
1997                    "create_disposition = 0x%x create_options=0x%x "
1998                    "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1999                    smb_fname_str_dbg(smb_fname), new_dos_attributes,
2000                    access_mask, share_access, create_disposition,
2001                    create_options, (unsigned int)unx_mode, oplock_request,
2002                    (unsigned int)private_flags));
2003
2004         if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
2005                 DEBUG(0, ("No smb request but not an internal only open!\n"));
2006                 return NT_STATUS_INTERNAL_ERROR;
2007         }
2008
2009         /*
2010          * Only non-internal opens can be deferred at all
2011          */
2012
2013         if (req) {
2014                 void *ptr;
2015                 if (get_deferred_open_message_state(req,
2016                                 &request_time,
2017                                 &ptr)) {
2018                         /* Remember the absolute time of the original
2019                            request with this mid. We'll use it later to
2020                            see if this has timed out. */
2021
2022                         /* If it was an async create retry, the file
2023                            didn't exist. */
2024
2025                         if (is_deferred_open_async(ptr)) {
2026                                 SET_STAT_INVALID(smb_fname->st);
2027                                 file_existed = false;
2028                         } else {
2029                                 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
2030                                 /* Remove the deferred open entry under lock. */
2031                                 remove_deferred_open_entry(
2032                                         state->id, req->mid,
2033                                         messaging_server_id(req->sconn->msg_ctx));
2034                         }
2035
2036                         /* Ensure we don't reprocess this message. */
2037                         remove_deferred_open_message_smb(req->sconn, req->mid);
2038                 }
2039         }
2040
2041         if (!posix_open) {
2042                 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
2043                 if (file_existed) {
2044                         existing_dos_attributes = dos_mode(conn, smb_fname);
2045                 }
2046         }
2047
2048         /* ignore any oplock requests if oplocks are disabled */
2049         if (!lp_oplocks(SNUM(conn)) ||
2050             IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
2051                 /* Mask off everything except the private Samba bits. */
2052                 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
2053         }
2054
2055         /* this is for OS/2 long file names - say we don't support them */
2056         if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
2057                 /* OS/2 Workplace shell fix may be main code stream in a later
2058                  * release. */
2059                 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
2060                          "supported.\n"));
2061                 if (use_nt_status()) {
2062                         return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2063                 }
2064                 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
2065         }
2066
2067         switch( create_disposition ) {
2068                 case FILE_OPEN:
2069                         /* If file exists open. If file doesn't exist error. */
2070                         if (!file_existed) {
2071                                 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
2072                                          "requested for file %s and file "
2073                                          "doesn't exist.\n",
2074                                          smb_fname_str_dbg(smb_fname)));
2075                                 errno = ENOENT;
2076                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2077                         }
2078                         break;
2079
2080                 case FILE_OVERWRITE:
2081                         /* If file exists overwrite. If file doesn't exist
2082                          * error. */
2083                         if (!file_existed) {
2084                                 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
2085                                          "requested for file %s and file "
2086                                          "doesn't exist.\n",
2087                                          smb_fname_str_dbg(smb_fname) ));
2088                                 errno = ENOENT;
2089                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2090                         }
2091                         break;
2092
2093                 case FILE_CREATE:
2094                         /* If file exists error. If file doesn't exist
2095                          * create. */
2096                         if (file_existed) {
2097                                 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
2098                                          "requested for file %s and file "
2099                                          "already exists.\n",
2100                                          smb_fname_str_dbg(smb_fname)));
2101                                 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
2102                                         errno = EISDIR;
2103                                 } else {
2104                                         errno = EEXIST;
2105                                 }
2106                                 return map_nt_error_from_unix(errno);
2107                         }
2108                         break;
2109
2110                 case FILE_SUPERSEDE:
2111                 case FILE_OVERWRITE_IF:
2112                 case FILE_OPEN_IF:
2113                         break;
2114                 default:
2115                         return NT_STATUS_INVALID_PARAMETER;
2116         }
2117
2118         flags2 = disposition_to_open_flags(create_disposition);
2119
2120         /* We only care about matching attributes on file exists and
2121          * overwrite. */
2122
2123         if (!posix_open && file_existed &&
2124             ((create_disposition == FILE_OVERWRITE) ||
2125              (create_disposition == FILE_OVERWRITE_IF))) {
2126                 if (!open_match_attributes(conn, existing_dos_attributes,
2127                                            new_dos_attributes,
2128                                            smb_fname->st.st_ex_mode,
2129                                            unx_mode, &new_unx_mode)) {
2130                         DEBUG(5,("open_file_ntcreate: attributes missmatch "
2131                                  "for file %s (%x %x) (0%o, 0%o)\n",
2132                                  smb_fname_str_dbg(smb_fname),
2133                                  existing_dos_attributes,
2134                                  new_dos_attributes,
2135                                  (unsigned int)smb_fname->st.st_ex_mode,
2136                                  (unsigned int)unx_mode ));
2137                         errno = EACCES;
2138                         return NT_STATUS_ACCESS_DENIED;
2139                 }
2140         }
2141
2142         status = smbd_calculate_access_mask(conn, smb_fname,
2143                                         false,
2144                                         access_mask,
2145                                         &access_mask); 
2146         if (!NT_STATUS_IS_OK(status)) {
2147                 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
2148                         "on file %s returned %s\n",
2149                         smb_fname_str_dbg(smb_fname), nt_errstr(status)));
2150                 return status;
2151         }
2152
2153         open_access_mask = access_mask;
2154
2155         if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
2156                 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
2157         }
2158
2159         DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
2160                    "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
2161                     access_mask));
2162
2163         /*
2164          * Note that we ignore the append flag as append does not
2165          * mean the same thing under DOS and Unix.
2166          */
2167
2168         flags = calculate_open_access_flags(access_mask, oplock_request,
2169                                             private_flags);
2170
2171         /*
2172          * Currently we only look at FILE_WRITE_THROUGH for create options.
2173          */
2174
2175 #if defined(O_SYNC)
2176         if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
2177                 flags2 |= O_SYNC;
2178         }
2179 #endif /* O_SYNC */
2180
2181         if (posix_open && (access_mask & FILE_APPEND_DATA)) {
2182                 flags2 |= O_APPEND;
2183         }
2184
2185         if (!posix_open && !CAN_WRITE(conn)) {
2186                 /*
2187                  * We should really return a permission denied error if either
2188                  * O_CREAT or O_TRUNC are set, but for compatibility with
2189                  * older versions of Samba we just AND them out.
2190                  */
2191                 flags2 &= ~(O_CREAT|O_TRUNC);
2192         }
2193
2194         /*
2195          * Ensure we can't write on a read-only share or file.
2196          */
2197
2198         if (flags != O_RDONLY && file_existed &&
2199             (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
2200                 DEBUG(5,("open_file_ntcreate: write access requested for "
2201                          "file %s on read only %s\n",
2202                          smb_fname_str_dbg(smb_fname),
2203                          !CAN_WRITE(conn) ? "share" : "file" ));
2204                 errno = EACCES;
2205                 return NT_STATUS_ACCESS_DENIED;
2206         }
2207
2208         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2209         fsp->share_access = share_access;
2210         fsp->fh->private_options = private_flags;
2211         fsp->access_mask = open_access_mask; /* We change this to the
2212                                               * requested access_mask after
2213                                               * the open is done. */
2214         fsp->posix_open = posix_open;
2215
2216         /* Ensure no SAMBA_PRIVATE bits can be set. */
2217         fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
2218
2219         if (timeval_is_zero(&request_time)) {
2220                 request_time = fsp->open_time;
2221         }
2222
2223         /*
2224          * Ensure we pay attention to default ACLs on directories if required.
2225          */
2226
2227         if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2228             (def_acl = directory_has_default_acl(conn, parent_dir))) {
2229                 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2230         }
2231
2232         DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2233                 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2234                  (unsigned int)flags, (unsigned int)flags2,
2235                  (unsigned int)unx_mode, (unsigned int)access_mask,
2236                  (unsigned int)open_access_mask));
2237
2238         fsp_open = open_file(fsp, conn, req, parent_dir,
2239                              flags|flags2, unx_mode, access_mask,
2240                              open_access_mask, &new_file_created);
2241
2242         if (!NT_STATUS_IS_OK(fsp_open)) {
2243                 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_RETRY)) {
2244                         schedule_async_open(request_time, req);
2245                 }
2246                 TALLOC_FREE(lck);
2247                 return fsp_open;
2248         }
2249
2250         if (file_existed && !check_same_dev_ino(&saved_stat, &smb_fname->st)) {
2251                 /*
2252                  * The file did exist, but some other (local or NFS)
2253                  * process either renamed/unlinked and re-created the
2254                  * file with different dev/ino after we walked the path,
2255                  * but before we did the open. We could retry the
2256                  * open but it's a rare enough case it's easier to
2257                  * just fail the open to prevent creating any problems
2258                  * in the open file db having the wrong dev/ino key.
2259                  */
2260                 TALLOC_FREE(lck);
2261                 fd_close(fsp);
2262                 DEBUG(1,("open_file_ntcreate: file %s - dev/ino mismatch. "
2263                         "Old (dev=0x%llu, ino =0x%llu). "
2264                         "New (dev=0x%llu, ino=0x%llu). Failing open "
2265                         " with NT_STATUS_ACCESS_DENIED.\n",
2266                          smb_fname_str_dbg(smb_fname),
2267                          (unsigned long long)saved_stat.st_ex_dev,
2268                          (unsigned long long)saved_stat.st_ex_ino,
2269                          (unsigned long long)smb_fname->st.st_ex_dev,
2270                          (unsigned long long)smb_fname->st.st_ex_ino));
2271                 return NT_STATUS_ACCESS_DENIED;
2272         }
2273
2274         old_write_time = smb_fname->st.st_ex_mtime;
2275
2276         /*
2277          * Deal with the race condition where two smbd's detect the
2278          * file doesn't exist and do the create at the same time. One
2279          * of them will win and set a share mode, the other (ie. this
2280          * one) should check if the requested share mode for this
2281          * create is allowed.
2282          */
2283
2284         /*
2285          * Now the file exists and fsp is successfully opened,
2286          * fsp->dev and fsp->inode are valid and should replace the
2287          * dev=0,inode=0 from a non existent file. Spotted by
2288          * Nadav Danieli <nadavd@exanet.com>. JRA.
2289          */
2290
2291         id = fsp->file_id;
2292
2293         lck = get_share_mode_lock(talloc_tos(), id,
2294                                   conn->connectpath,
2295                                   smb_fname, &old_write_time);
2296
2297         if (lck == NULL) {
2298                 DEBUG(0, ("open_file_ntcreate: Could not get share "
2299                           "mode lock for %s\n",
2300                           smb_fname_str_dbg(smb_fname)));
2301                 fd_close(fsp);
2302                 return NT_STATUS_SHARING_VIOLATION;
2303         }
2304
2305         /* Get the types we need to examine. */
2306         find_oplock_types(fsp,
2307                           oplock_request,
2308                           lck,
2309                           &batch_entry,
2310                           &exclusive_entry,
2311                           &got_level2_oplock,
2312                           &got_a_none_oplock);
2313
2314         /* First pass - send break only on batch oplocks. */
2315         if ((req != NULL) &&
2316             delay_for_batch_oplocks(fsp,
2317                                     req->mid,
2318                                     oplock_request,
2319                                     batch_entry)) {
2320                 schedule_defer_open(lck, request_time, req);
2321                 TALLOC_FREE(lck);
2322                 fd_close(fsp);
2323                 return NT_STATUS_SHARING_VIOLATION;
2324         }
2325
2326         status = open_mode_check(conn, lck, fsp->name_hash,
2327                                  access_mask, share_access,
2328                                  create_options, &file_existed);
2329
2330         if (NT_STATUS_IS_OK(status)) {
2331                 /* We might be going to allow this open. Check oplock
2332                  * status again. */
2333                 /* Second pass - send break for both batch or
2334                  * exclusive oplocks. */
2335                 if ((req != NULL) &&
2336                     delay_for_exclusive_oplocks(
2337                             fsp,
2338                             req->mid,
2339                             oplock_request,
2340                             exclusive_entry)) {
2341                         schedule_defer_open(lck, request_time, req);
2342                         TALLOC_FREE(lck);
2343                         fd_close(fsp);
2344                         return NT_STATUS_SHARING_VIOLATION;
2345                 }
2346         }
2347
2348         if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2349                 /* DELETE_PENDING is not deferred for a second */
2350                 TALLOC_FREE(lck);
2351                 return status;
2352         }
2353
2354         if (!NT_STATUS_IS_OK(status)) {
2355                 uint32 can_access_mask;
2356                 bool can_access = True;
2357
2358                 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2359
2360                 /* Check if this can be done with the deny_dos and fcb
2361                  * calls. */
2362                 if (private_flags &
2363                     (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2364                      NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2365                         if (req == NULL) {
2366                                 DEBUG(0, ("DOS open without an SMB "
2367                                           "request!\n"));
2368                                 TALLOC_FREE(lck);
2369                                 return NT_STATUS_INTERNAL_ERROR;
2370                         }
2371
2372                         /* Use the client requested access mask here,
2373                          * not the one we open with. */
2374                         status = fcb_or_dos_open(req,
2375                                                  conn,
2376                                                  fsp,
2377                                                  smb_fname,
2378                                                  id,
2379                                                  req->smbpid,
2380                                                  req->vuid,
2381                                                  access_mask,
2382                                                  share_access,
2383                                                  create_options);
2384
2385                         if (NT_STATUS_IS_OK(status)) {
2386                                 TALLOC_FREE(lck);
2387                                 if (pinfo) {
2388                                         *pinfo = FILE_WAS_OPENED;
2389                                 }
2390                                 return NT_STATUS_OK;
2391                         }
2392                 }
2393
2394                 /*
2395                  * This next line is a subtlety we need for
2396                  * MS-Access. If a file open will fail due to share
2397                  * permissions and also for security (access) reasons,
2398                  * we need to return the access failed error, not the
2399                  * share error. We can't open the file due to kernel
2400                  * oplock deadlock (it's possible we failed above on
2401                  * the open_mode_check()) so use a userspace check.
2402                  */
2403
2404                 if (flags & O_RDWR) {
2405                         can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2406                 } else if (flags & O_WRONLY) {
2407                         can_access_mask = FILE_WRITE_DATA;
2408                 } else {
2409                         can_access_mask = FILE_READ_DATA;
2410                 }
2411
2412                 if (((can_access_mask & FILE_WRITE_DATA) &&
2413                      !CAN_WRITE(conn)) ||
2414                     !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2415                                                               smb_fname,
2416                                                               false,
2417                                                               can_access_mask))) {
2418                         can_access = False;
2419                 }
2420
2421                 /*
2422                  * If we're returning a share violation, ensure we
2423                  * cope with the braindead 1 second delay.
2424                  */
2425
2426                 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2427                     lp_defer_sharing_violations()) {
2428                         struct timeval timeout;
2429                         struct deferred_open_record state;
2430                         int timeout_usecs;
2431
2432                         /* this is a hack to speed up torture tests
2433                            in 'make test' */
2434                         timeout_usecs = lp_parm_int(SNUM(conn),
2435                                                     "smbd","sharedelay",
2436                                                     SHARING_VIOLATION_USEC_WAIT);
2437
2438                         /* This is a relative time, added to the absolute
2439                            request_time value to get the absolute timeout time.
2440                            Note that if this is the second or greater time we enter
2441                            this codepath for this particular request mid then
2442                            request_time is left as the absolute time of the *first*
2443                            time this request mid was processed. This is what allows
2444                            the request to eventually time out. */
2445
2446                         timeout = timeval_set(0, timeout_usecs);
2447
2448                         /* Nothing actually uses state.delayed_for_oplocks
2449                            but it's handy to differentiate in debug messages
2450                            between a 30 second delay due to oplock break, and
2451                            a 1 second delay for share mode conflicts. */
2452
2453                         state.delayed_for_oplocks = False;
2454                         state.async_open = false;
2455                         state.id = id;
2456
2457                         if ((req != NULL)
2458                             && !request_timed_out(request_time,
2459                                                   timeout)) {
2460                                 defer_open(lck, request_time, timeout,
2461                                            req, &state);
2462                         }
2463                 }
2464
2465                 TALLOC_FREE(lck);
2466                 if (can_access) {
2467                         /*
2468                          * We have detected a sharing violation here
2469                          * so return the correct error code
2470                          */
2471                         status = NT_STATUS_SHARING_VIOLATION;
2472                 } else {
2473                         status = NT_STATUS_ACCESS_DENIED;
2474                 }
2475                 return status;
2476         }
2477
2478         grant_fsp_oplock_type(fsp,
2479                               oplock_request,
2480                               got_level2_oplock,
2481                               got_a_none_oplock);
2482
2483         /*
2484          * We have the share entry *locked*.....
2485          */
2486
2487         SMB_ASSERT(lck != NULL);
2488
2489         /* Delete streams if create_disposition requires it */
2490         if (!new_file_created && clear_ads(create_disposition) &&
2491             !is_ntfs_stream_smb_fname(smb_fname)) {
2492                 status = delete_all_streams(conn, smb_fname->base_name);
2493                 if (!NT_STATUS_IS_OK(status)) {
2494                         TALLOC_FREE(lck);
2495                         fd_close(fsp);
2496                         return status;
2497                 }
2498         }
2499
2500         /* note that we ignore failure for the following. It is
2501            basically a hack for NFS, and NFS will never set one of
2502            these only read them. Nobody but Samba can ever set a deny
2503            mode and we have already checked our more authoritative
2504            locking database for permission to set this deny mode. If
2505            the kernel refuses the operations then the kernel is wrong.
2506            note that GPFS supports it as well - jmcd */
2507
2508         if (fsp->fh->fd != -1 && lp_kernel_share_modes(SNUM(conn))) {
2509                 int ret_flock;
2510                 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2511                 if(ret_flock == -1 ){
2512
2513                         TALLOC_FREE(lck);
2514                         fd_close(fsp);
2515
2516                         return NT_STATUS_SHARING_VIOLATION;
2517                 }
2518         }
2519
2520         /*
2521          * At this point onwards, we can guarantee that the share entry
2522          * is locked, whether we created the file or not, and that the
2523          * deny mode is compatible with all current opens.
2524          */
2525
2526         /*
2527          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2528          * but we don't have to store this - just ignore it on access check.
2529          */
2530         if (conn->sconn->using_smb2) {
2531                 /*
2532                  * SMB2 doesn't return it (according to Microsoft tests).
2533                  * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2534                  * File created with access = 0x7 (Read, Write, Delete)
2535                  * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2536                  */
2537                 fsp->access_mask = access_mask;
2538         } else {
2539                 /* But SMB1 does. */
2540                 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2541         }
2542
2543         if (file_existed) {
2544                 /* stat opens on existing files don't get oplocks. */
2545                 if (is_stat_open(open_access_mask)) {
2546                         fsp->oplock_type = NO_OPLOCK;
2547                 }
2548         }
2549
2550         if (new_file_created) {
2551                 info = FILE_WAS_CREATED;
2552         } else {
2553                 if (flags2 & O_TRUNC) {
2554                         info = FILE_WAS_OVERWRITTEN;
2555                 } else {
2556                         info = FILE_WAS_OPENED;
2557                 }
2558         }
2559
2560         if (pinfo) {
2561                 *pinfo = info;
2562         }
2563
2564         /*
2565          * Setup the oplock info in both the shared memory and
2566          * file structs.
2567          */
2568
2569         status = set_file_oplock(fsp, fsp->oplock_type);
2570         if (!NT_STATUS_IS_OK(status)) {
2571                 /*
2572                  * Could not get the kernel oplock or there are byte-range
2573                  * locks on the file.
2574                  */
2575                 fsp->oplock_type = NO_OPLOCK;
2576         }
2577
2578         set_share_mode(lck, fsp, get_current_uid(conn),
2579                         req ? req->mid : 0,
2580                        fsp->oplock_type);
2581
2582         /* Handle strange delete on close create semantics. */
2583         if (create_options & FILE_DELETE_ON_CLOSE) {
2584
2585                 status = can_set_delete_on_close(fsp, new_dos_attributes);
2586
2587                 if (!NT_STATUS_IS_OK(status)) {
2588                         /* Remember to delete the mode we just added. */
2589                         del_share_mode(lck, fsp);
2590                         TALLOC_FREE(lck);
2591                         fd_close(fsp);
2592                         return status;
2593                 }
2594                 /* Note that here we set the *inital* delete on close flag,
2595                    not the regular one. The magic gets handled in close. */
2596                 fsp->initial_delete_on_close = True;
2597         }
2598
2599         if (info != FILE_WAS_OPENED) {
2600                 /* Files should be initially set as archive */
2601                 if (lp_map_archive(SNUM(conn)) ||
2602                     lp_store_dos_attributes(SNUM(conn))) {
2603                         if (!posix_open) {
2604                                 if (file_set_dosmode(conn, smb_fname,
2605                                             new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2606                                             parent_dir, true) == 0) {
2607                                         unx_mode = smb_fname->st.st_ex_mode;
2608                                 }
2609                         }
2610                 }
2611         }
2612
2613         /* Determine sparse flag. */
2614         if (posix_open) {
2615                 /* POSIX opens are sparse by default. */
2616                 fsp->is_sparse = true;
2617         } else {
2618                 fsp->is_sparse = (file_existed &&
2619                         (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2620         }
2621
2622         /*
2623          * Take care of inherited ACLs on created files - if default ACL not
2624          * selected.
2625          */
2626
2627         if (!posix_open && new_file_created && !def_acl) {
2628
2629                 int saved_errno = errno; /* We might get ENOSYS in the next
2630                                           * call.. */
2631
2632                 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2633                     errno == ENOSYS) {
2634                         errno = saved_errno; /* Ignore ENOSYS */
2635                 }
2636
2637         } else if (new_unx_mode) {
2638
2639                 int ret = -1;
2640
2641                 /* Attributes need changing. File already existed. */
2642
2643                 {
2644                         int saved_errno = errno; /* We might get ENOSYS in the
2645                                                   * next call.. */
2646                         ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2647
2648                         if (ret == -1 && errno == ENOSYS) {
2649                                 errno = saved_errno; /* Ignore ENOSYS */
2650                         } else {
2651                                 DEBUG(5, ("open_file_ntcreate: reset "
2652                                           "attributes of file %s to 0%o\n",
2653                                           smb_fname_str_dbg(smb_fname),
2654                                           (unsigned int)new_unx_mode));
2655                                 ret = 0; /* Don't do the fchmod below. */
2656                         }
2657                 }
2658
2659                 if ((ret == -1) &&
2660                     (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2661                         DEBUG(5, ("open_file_ntcreate: failed to reset "
2662                                   "attributes of file %s to 0%o\n",
2663                                   smb_fname_str_dbg(smb_fname),
2664                                   (unsigned int)new_unx_mode));
2665         }
2666
2667         /* If this is a successful open, we must remove any deferred open
2668          * records. */
2669         if (req != NULL) {
2670                 del_deferred_open_entry(lck, req->mid,
2671                                         messaging_server_id(req->sconn->msg_ctx));
2672         }
2673         TALLOC_FREE(lck);
2674
2675         return NT_STATUS_OK;
2676 }
2677
2678
2679 /****************************************************************************
2680  Open a file for for write to ensure that we can fchmod it.
2681 ****************************************************************************/
2682
2683 NTSTATUS open_file_fchmod(connection_struct *conn,
2684                           struct smb_filename *smb_fname,
2685                           files_struct **result)
2686 {
2687         if (!VALID_STAT(smb_fname->st)) {
2688                 return NT_STATUS_INVALID_PARAMETER;
2689         }
2690
2691         return SMB_VFS_CREATE_FILE(
2692                 conn,                                   /* conn */
2693                 NULL,                                   /* req */
2694                 0,                                      /* root_dir_fid */
2695                 smb_fname,                              /* fname */
2696                 FILE_WRITE_DATA,                        /* access_mask */
2697                 (FILE_SHARE_READ | FILE_SHARE_WRITE |   /* share_access */
2698                     FILE_SHARE_DELETE),
2699                 FILE_OPEN,                              /* create_disposition*/
2700                 0,                                      /* create_options */
2701                 0,                                      /* file_attributes */
2702                 INTERNAL_OPEN_ONLY,                     /* oplock_request */
2703                 0,                                      /* allocation_size */
2704                 0,                                      /* private_flags */
2705                 NULL,                                   /* sd */
2706                 NULL,                                   /* ea_list */
2707                 result,                                 /* result */
2708                 NULL);                                  /* pinfo */
2709 }
2710
2711 static NTSTATUS mkdir_internal(connection_struct *conn,
2712                                struct smb_filename *smb_dname,
2713                                uint32 file_attributes)
2714 {
2715         mode_t mode;
2716         char *parent_dir = NULL;
2717         NTSTATUS status;
2718         bool posix_open = false;
2719         bool need_re_stat = false;
2720         uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2721
2722         if (!CAN_WRITE(conn) || (access_mask & ~(conn->share_access))) {
2723                 DEBUG(5,("mkdir_internal: failing share access "
2724                          "%s\n", lp_servicename(talloc_tos(), SNUM(conn))));
2725                 return NT_STATUS_ACCESS_DENIED;
2726         }
2727
2728         if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2729                             NULL)) {
2730                 return NT_STATUS_NO_MEMORY;
2731         }
2732
2733         if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2734                 posix_open = true;
2735                 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2736         } else {
2737                 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2738         }
2739
2740         status = check_parent_access(conn,
2741                                         smb_dname,
2742                                         access_mask);
2743         if(!NT_STATUS_IS_OK(status)) {
2744                 DEBUG(5,("mkdir_internal: check_parent_access "
2745                         "on directory %s for path %s returned %s\n",
2746                         parent_dir,
2747                         smb_dname->base_name,
2748                         nt_errstr(status) ));
2749                 return status;
2750         }
2751
2752         if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2753                 return map_nt_error_from_unix(errno);
2754         }
2755
2756         /* Ensure we're checking for a symlink here.... */
2757         /* We don't want to get caught by a symlink racer. */
2758
2759         if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2760                 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2761                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2762                 return map_nt_error_from_unix(errno);
2763         }
2764
2765         if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2766                 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2767                           smb_fname_str_dbg(smb_dname)));
2768                 return NT_STATUS_NOT_A_DIRECTORY;
2769         }
2770
2771         if (lp_store_dos_attributes(SNUM(conn))) {
2772                 if (!posix_open) {
2773                         file_set_dosmode(conn, smb_dname,
2774                                          file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2775                                          parent_dir, true);
2776                 }
2777         }
2778
2779         if (lp_inherit_perms(SNUM(conn))) {
2780                 inherit_access_posix_acl(conn, parent_dir,
2781                                          smb_dname->base_name, mode);
2782                 need_re_stat = true;
2783         }
2784
2785         if (!posix_open) {
2786                 /*
2787                  * Check if high bits should have been set,
2788                  * then (if bits are missing): add them.
2789                  * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2790                  * dir.
2791                  */
2792                 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2793                     (mode & ~smb_dname->st.st_ex_mode)) {
2794                         SMB_VFS_CHMOD(conn, smb_dname->base_name,
2795                                       (smb_dname->st.st_ex_mode |
2796                                           (mode & ~smb_dname->st.st_ex_mode)));
2797                         need_re_stat = true;
2798                 }
2799         }
2800
2801         /* Change the owner if required. */
2802         if (lp_inherit_owner(SNUM(conn))) {
2803                 change_dir_owner_to_parent(conn, parent_dir,
2804                                            smb_dname->base_name,
2805                                            &smb_dname->st);
2806                 need_re_stat = true;
2807         }
2808
2809         if (need_re_stat) {
2810                 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2811                         DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2812                           smb_fname_str_dbg(smb_dname), strerror(errno)));
2813                         return map_nt_error_from_unix(errno);
2814                 }
2815         }
2816
2817         notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2818                      smb_dname->base_name);
2819
2820         return NT_STATUS_OK;
2821 }
2822
2823 /****************************************************************************
2824  Open a directory from an NT SMB call.
2825 ****************************************************************************/
2826
2827 static NTSTATUS open_directory(connection_struct *conn,
2828                                struct smb_request *req,
2829                                struct smb_filename *smb_dname,
2830                                uint32 access_mask,
2831                                uint32 share_access,
2832                                uint32 create_disposition,
2833                                uint32 create_options,
2834                                uint32 file_attributes,
2835                                int *pinfo,
2836                                files_struct **result)
2837 {
2838         files_struct *fsp = NULL;
2839         bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2840         struct share_mode_lock *lck = NULL;
2841         NTSTATUS status;
2842         struct timespec mtimespec;
2843         int info = 0;
2844
2845         if (is_ntfs_stream_smb_fname(smb_dname)) {
2846                 DEBUG(2, ("open_directory: %s is a stream name!\n",
2847                           smb_fname_str_dbg(smb_dname)));
2848                 return NT_STATUS_NOT_A_DIRECTORY;
2849         }
2850
2851         if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2852                 /* Ensure we have a directory attribute. */
2853                 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2854         }
2855
2856         DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2857                  "share_access = 0x%x create_options = 0x%x, "
2858                  "create_disposition = 0x%x, file_attributes = 0x%x\n",
2859                  smb_fname_str_dbg(smb_dname),
2860                  (unsigned int)access_mask,
2861                  (unsigned int)share_access,
2862                  (unsigned int)create_options,
2863                  (unsigned int)create_disposition,
2864                  (unsigned int)file_attributes));
2865
2866         status = smbd_calculate_access_mask(conn, smb_dname, false,
2867                                             access_mask, &access_mask);
2868         if (!NT_STATUS_IS_OK(status)) {
2869                 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2870                         "on file %s returned %s\n",
2871                         smb_fname_str_dbg(smb_dname),
2872                         nt_errstr(status)));
2873                 return status;
2874         }
2875
2876         if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2877                         !security_token_has_privilege(get_current_nttok(conn),
2878                                         SEC_PRIV_SECURITY)) {
2879                 DEBUG(10, ("open_directory: open on %s "
2880                         "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2881                         smb_fname_str_dbg(smb_dname)));
2882                 return NT_STATUS_PRIVILEGE_NOT_HELD;
2883         }
2884
2885         switch( create_disposition ) {
2886                 case FILE_OPEN:
2887
2888                         if (!dir_existed) {
2889                                 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2890                         }
2891
2892                         info = FILE_WAS_OPENED;
2893                         break;
2894
2895                 case FILE_CREATE:
2896
2897                         /* If directory exists error. If directory doesn't
2898                          * exist create. */
2899
2900                         if (dir_existed) {
2901                                 status = NT_STATUS_OBJECT_NAME_COLLISION;
2902                                 DEBUG(2, ("open_directory: unable to create "
2903                                           "%s. Error was %s\n",
2904                                           smb_fname_str_dbg(smb_dname),
2905                                           nt_errstr(status)));
2906                                 return status;
2907                         }
2908
2909                         status = mkdir_internal(conn, smb_dname,
2910                                                 file_attributes);
2911
2912                         if (!NT_STATUS_IS_OK(status)) {
2913                                 DEBUG(2, ("open_directory: unable to create "
2914                                           "%s. Error was %s\n",
2915                                           smb_fname_str_dbg(smb_dname),
2916                                           nt_errstr(status)));
2917                                 return status;
2918                         }
2919
2920                         info = FILE_WAS_CREATED;
2921                         break;
2922
2923                 case FILE_OPEN_IF:
2924                         /*
2925                          * If directory exists open. If directory doesn't
2926                          * exist create.
2927                          */
2928
2929                         if (dir_existed) {
2930                                 status = NT_STATUS_OK;
2931                                 info = FILE_WAS_OPENED;
2932                         } else {
2933                                 status = mkdir_internal(conn, smb_dname,
2934                                                 file_attributes);
2935
2936                                 if (NT_STATUS_IS_OK(status)) {
2937                                         info = FILE_WAS_CREATED;
2938                                 } else {
2939                                         /* Cope with create race. */
2940                                         if (!NT_STATUS_EQUAL(status,
2941                                                         NT_STATUS_OBJECT_NAME_COLLISION)) {
2942                                                 DEBUG(2, ("open_directory: unable to create "
2943                                                         "%s. Error was %s\n",
2944                                                         smb_fname_str_dbg(smb_dname),
2945                                                         nt_errstr(status)));
2946                                                 return status;
2947                                         }
2948                                         info = FILE_WAS_OPENED;
2949                                 }
2950                         }
2951
2952                         break;
2953
2954                 case FILE_SUPERSEDE:
2955                 case FILE_OVERWRITE:
2956                 case FILE_OVERWRITE_IF:
2957                 default:
2958                         DEBUG(5,("open_directory: invalid create_disposition "
2959                                  "0x%x for directory %s\n",
2960                                  (unsigned int)create_disposition,
2961                                  smb_fname_str_dbg(smb_dname)));
2962                         return NT_STATUS_INVALID_PARAMETER;
2963         }
2964
2965         if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2966                 DEBUG(5,("open_directory: %s is not a directory !\n",
2967                          smb_fname_str_dbg(smb_dname)));
2968                 return NT_STATUS_NOT_A_DIRECTORY;
2969         }
2970
2971         if (info == FILE_WAS_OPENED) {
2972                 status = smbd_check_access_rights(conn,
2973                                                 smb_dname,
2974                                                 false,
2975                                                 access_mask);
2976                 if (!NT_STATUS_IS_OK(status)) {
2977                         DEBUG(10, ("open_directory: smbd_check_access_rights on "
2978                                 "file %s failed with %s\n",
2979                                 smb_fname_str_dbg(smb_dname),
2980                                 nt_errstr(status)));
2981                         return status;
2982                 }
2983         }
2984
2985         status = file_new(req, conn, &fsp);
2986         if(!NT_STATUS_IS_OK(status)) {
2987                 return status;
2988         }
2989
2990         /*
2991          * Setup the files_struct for it.
2992          */
2993
2994         fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2995         fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2996         fsp->file_pid = req ? req->smbpid : 0;
2997         fsp->can_lock = False;
2998         fsp->can_read = False;
2999         fsp->can_write = False;
3000
3001         fsp->share_access = share_access;
3002         fsp->fh->private_options = 0;
3003         /*
3004          * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
3005          */
3006         fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3007         fsp->print_file = NULL;
3008         fsp->modified = False;
3009         fsp->oplock_type = NO_OPLOCK;
3010         fsp->sent_oplock_break = NO_BREAK_SENT;
3011         fsp->is_directory = True;
3012         fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
3013         status = fsp_set_smb_fname(fsp, smb_dname);
3014         if (!NT_STATUS_IS_OK(status)) {
3015                 file_free(req, fsp);
3016                 return status;
3017         }
3018
3019         mtimespec = smb_dname->st.st_ex_mtime;
3020
3021 #ifdef O_DIRECTORY
3022         status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
3023 #else
3024         /* POSIX allows us to open a directory with O_RDONLY. */
3025         status = fd_open(conn, fsp, O_RDONLY, 0);
3026 #endif
3027         if (!NT_STATUS_IS_OK(status)) {
3028                 DEBUG(5, ("open_directory: Could not open fd for "
3029                         "%s (%s)\n",
3030                         smb_fname_str_dbg(smb_dname),
3031                         nt_errstr(status)));
3032                 file_free(req, fsp);
3033                 return status;
3034         }
3035
3036         status = vfs_stat_fsp(fsp);
3037         if (!NT_STATUS_IS_OK(status)) {
3038                 fd_close(fsp);
3039                 file_free(req, fsp);
3040                 return status;
3041         }
3042
3043         /* Ensure there was no race condition. */
3044         if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
3045                 DEBUG(5,("open_directory: stat struct differs for "
3046                         "directory %s.\n",
3047                         smb_fname_str_dbg(smb_dname)));
3048                 fd_close(fsp);
3049                 file_free(req, fsp);
3050                 return NT_STATUS_ACCESS_DENIED;
3051         }
3052
3053         lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
3054                                   conn->connectpath, smb_dname,
3055                                   &mtimespec);
3056
3057         if (lck == NULL) {
3058                 DEBUG(0, ("open_directory: Could not get share mode lock for "
3059                           "%s\n", smb_fname_str_dbg(smb_dname)));
3060                 fd_close(fsp);
3061                 file_free(req, fsp);
3062                 return NT_STATUS_SHARING_VIOLATION;
3063         }
3064
3065         status = open_mode_check(conn, lck, fsp->name_hash,
3066                                 access_mask, share_access,
3067                                  create_options, &dir_existed);
3068
3069         if (!NT_STATUS_IS_OK(status)) {
3070                 TALLOC_FREE(lck);
3071                 fd_close(fsp);
3072                 file_free(req, fsp);
3073                 return status;
3074         }
3075
3076         set_share_mode(lck, fsp, get_current_uid(conn),
3077                         req ? req->mid : 0, NO_OPLOCK);
3078
3079         /* For directories the delete on close bit at open time seems
3080            always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
3081         if (create_options & FILE_DELETE_ON_CLOSE) {
3082                 status = can_set_delete_on_close(fsp, 0);
3083                 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
3084                         TALLOC_FREE(lck);
3085                         fd_close(fsp);
3086                         file_free(req, fsp);
3087                         return status;
3088                 }
3089
3090                 if (NT_STATUS_IS_OK(status)) {
3091                         /* Note that here we set the *inital* delete on close flag,
3092                            not the regular one. The magic gets handled in close. */
3093                         fsp->initial_delete_on_close = True;
3094                 }
3095         }
3096
3097         TALLOC_FREE(lck);
3098
3099         if (pinfo) {
3100                 *pinfo = info;
3101         }
3102
3103         *result = fsp;
3104         return NT_STATUS_OK;
3105 }
3106
3107 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
3108                           struct smb_filename *smb_dname)
3109 {
3110         NTSTATUS status;
3111         files_struct *fsp;
3112
3113         status = SMB_VFS_CREATE_FILE(
3114                 conn,                                   /* conn */
3115                 req,                                    /* req */
3116                 0,                                      /* root_dir_fid */
3117                 smb_dname,                              /* fname */
3118                 FILE_READ_ATTRIBUTES,                   /* access_mask */
3119                 FILE_SHARE_NONE,                        /* share_access */
3120                 FILE_CREATE,                            /* create_disposition*/
3121                 FILE_DIRECTORY_FILE,                    /* create_options */
3122                 FILE_ATTRIBUTE_DIRECTORY,               /* file_attributes */
3123                 0,                                      /* oplock_request */
3124                 0,                                      /* allocation_size */
3125                 0,                                      /* private_flags */
3126                 NULL,                                   /* sd */
3127                 NULL,                                   /* ea_list */
3128                 &fsp,                                   /* result */
3129                 NULL);                                  /* pinfo */
3130
3131         if (NT_STATUS_IS_OK(status)) {
3132                 close_file(req, fsp, NORMAL_CLOSE);
3133         }
3134
3135         return status;
3136 }
3137
3138 /****************************************************************************
3139  Receive notification that one of our open files has been renamed by another
3140  smbd process.
3141 ****************************************************************************/
3142
3143 void msg_file_was_renamed(struct messaging_context *msg,
3144                           void *private_data,
3145                           uint32_t msg_type,
3146                           struct server_id server_id,
3147                           DATA_BLOB *data)
3148 {
3149         files_struct *fsp;
3150         char *frm = (char *)data->data;
3151         struct file_id id;
3152         const char *sharepath;
3153         const char *base_name;
3154         const char *stream_name;
3155         struct smb_filename *smb_fname = NULL;
3156         size_t sp_len, bn_len;
3157         NTSTATUS status;
3158         struct smbd_server_connection *sconn =
3159                 talloc_get_type_abort(private_data,
3160                 struct smbd_server_connection);
3161
3162         if (data->data == NULL
3163             || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3164                 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3165                           (int)data->length));
3166                 return;
3167         }
3168
3169         /* Unpack the message. */
3170         pull_file_id_24(frm, &id);
3171         sharepath = &frm[24];
3172         sp_len = strlen(sharepath);
3173         base_name = sharepath + sp_len + 1;
3174         bn_len = strlen(base_name);
3175         stream_name = sharepath + sp_len + 1 + bn_len + 1;
3176
3177         /* stream_name must always be NULL if there is no stream. */
3178         if (stream_name[0] == '\0') {
3179                 stream_name = NULL;
3180         }
3181
3182         status = create_synthetic_smb_fname(talloc_tos(), base_name,
3183                                             stream_name, NULL, &smb_fname);
3184         if (!NT_STATUS_IS_OK(status)) {
3185                 return;
3186         }
3187
3188         DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3189                 "file_id %s\n",
3190                 sharepath, smb_fname_str_dbg(smb_fname),
3191                 file_id_string_tos(&id)));
3192
3193         for(fsp = file_find_di_first(sconn, id); fsp;
3194             fsp = file_find_di_next(fsp)) {
3195                 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3196
3197                         DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
3198                                 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
3199                                 smb_fname_str_dbg(smb_fname)));
3200                         status = fsp_set_smb_fname(fsp, smb_fname);
3201                         if (!NT_STATUS_IS_OK(status)) {
3202                                 goto out;
3203                         }
3204                 } else {
3205                         /* TODO. JRA. */
3206                         /* Now we have the complete path we can work out if this is
3207                            actually within this share and adjust newname accordingly. */
3208                         DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3209                                 "not sharepath %s) "
3210                                 "%s from %s -> %s\n",
3211                                 fsp->conn->connectpath,
3212                                 sharepath,
3213                                 fsp_fnum_dbg(fsp),
3214                                 fsp_str_dbg(fsp),
3215                                 smb_fname_str_dbg(smb_fname)));
3216                 }
3217         }
3218  out:
3219         TALLOC_FREE(smb_fname);
3220         return;
3221 }
3222
3223 /*
3224  * If a main file is opened for delete, all streams need to be checked for
3225  * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3226  * If that works, delete them all by setting the delete on close and close.
3227  */
3228
3229 NTSTATUS open_streams_for_delete(connection_struct *conn,
3230                                         const char *fname)
3231 {
3232         struct stream_struct *stream_info = NULL;
3233         files_struct **streams = NULL;
3234         int i;
3235         unsigned int num_streams = 0;
3236         TALLOC_CTX *frame = talloc_stackframe();
3237         NTSTATUS status;
3238
3239         status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3240                                 &num_streams, &stream_info);
3241
3242         if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3243             || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3244                 DEBUG(10, ("no streams around\n"));
3245                 TALLOC_FREE(frame);
3246                 return NT_STATUS_OK;
3247         }
3248
3249         if (!NT_STATUS_IS_OK(status)) {
3250                 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3251                            nt_errstr(status)));
3252                 goto fail;
3253         }
3254
3255         DEBUG(10, ("open_streams_for_delete found %d streams\n",
3256                    num_streams));
3257
3258         if (num_streams == 0) {
3259                 TALLOC_FREE(frame);
3260                 return NT_STATUS_OK;
3261         }
3262
3263         streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3264         if (streams == NULL) {
3265                 DEBUG(0, ("talloc failed\n"));
3266                 status = NT_STATUS_NO_MEMORY;
3267                 goto fail;
3268         }
3269
3270         for (i=0; i<num_streams; i++) {
3271                 struct smb_filename *smb_fname = NULL;
3272
3273                 if (strequal(stream_info[i].name, "::$DATA")) {
3274                         streams[i] = NULL;
3275                         continue;
3276                 }
3277
3278                 status = create_synthetic_smb_fname(talloc_tos(), fname,
3279                                                     stream_info[i].name,
3280                                                     NULL, &smb_fname);
3281                 if (!NT_STATUS_IS_OK(status)) {
3282                         goto fail;
3283                 }
3284
3285                 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3286                         DEBUG(10, ("Unable to stat stream: %s\n",
3287                                    smb_fname_str_dbg(smb_fname)));
3288                 }
3289
3290                 status = SMB_VFS_CREATE_FILE(
3291                          conn,                  /* conn */
3292                          NULL,                  /* req */
3293                          0,                     /* root_dir_fid */
3294                          smb_fname,             /* fname */
3295                          DELETE_ACCESS,         /* access_mask */
3296                          (FILE_SHARE_READ |     /* share_access */
3297                              FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3298                          FILE_OPEN,             /* create_disposition*/
3299                          0,                     /* create_options */
3300                          FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3301                          0,                     /* oplock_request */
3302                          0,                     /* allocation_size */
3303                          NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3304                          NULL,                  /* sd */
3305                          NULL,                  /* ea_list */
3306                          &streams[i],           /* result */
3307                          NULL);                 /* pinfo */
3308
3309                 if (!NT_STATUS_IS_OK(status)) {
3310                         DEBUG(10, ("Could not open stream %s: %s\n",
3311                                    smb_fname_str_dbg(smb_fname),
3312                                    nt_errstr(status)));
3313
3314                         TALLOC_FREE(smb_fname);
3315                         break;
3316                 }
3317                 TALLOC_FREE(smb_fname);
3318         }
3319
3320         /*
3321          * don't touch the variable "status" beyond this point :-)
3322          */
3323
3324         for (i -= 1 ; i >= 0; i--) {
3325                 if (streams[i] == NULL) {
3326                         continue;
3327                 }
3328
3329                 DEBUG(10, ("Closing stream # %d, %s\n", i,
3330                            fsp_str_dbg(streams[i])));
3331                 close_file(NULL, streams[i], NORMAL_CLOSE);
3332         }
3333
3334  fail:
3335         TALLOC_FREE(frame);
3336         return status;
3337 }
3338
3339 /*********************************************************************
3340  Create a default ACL by inheriting from the parent. If no inheritance
3341  from the parent available, don't set anything. This will leave the actual
3342  permissions the new file or directory already got from the filesystem
3343  as the NT ACL when read.
3344 *********************************************************************/
3345
3346 static NTSTATUS inherit_new_acl(files_struct *fsp)
3347 {
3348         TALLOC_CTX *ctx = talloc_tos();
3349         char *parent_name = NULL;
3350         struct security_descriptor *parent_desc = NULL;
3351         NTSTATUS status = NT_STATUS_OK;
3352         struct security_descriptor *psd = NULL;
3353         struct dom_sid *owner_sid = NULL;
3354         struct dom_sid *group_sid = NULL;
3355         uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3356         bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3357         bool inheritable_components = false;
3358         size_t size = 0;
3359
3360         if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3361                 return NT_STATUS_NO_MEMORY;
3362         }
3363
3364         status = SMB_VFS_GET_NT_ACL(fsp->conn,
3365                                 parent_name,
3366                                 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3367                                 &parent_desc);
3368         if (!NT_STATUS_IS_OK(status)) {
3369                 return status;
3370         }
3371
3372         inheritable_components = sd_has_inheritable_components(parent_desc,
3373                                         fsp->is_directory);
3374
3375         if (!inheritable_components && !inherit_owner) {
3376                 /* Nothing to inherit and not setting owner. */
3377                 return NT_STATUS_OK;
3378         }
3379
3380         /* Create an inherited descriptor from the parent. */
3381
3382         if (DEBUGLEVEL >= 10) {
3383                 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3384                         fsp_str_dbg(fsp) ));
3385                 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3386         }
3387
3388         /* Inherit from parent descriptor if "inherit owner" set. */
3389         if (inherit_owner) {
3390                 owner_sid = parent_desc->owner_sid;
3391                 group_sid = parent_desc->group_sid;
3392         }
3393
3394         if (owner_sid == NULL) {
3395                 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3396         }
3397         if (group_sid == NULL) {
3398                 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3399         }
3400
3401         status = se_create_child_secdesc(ctx,
3402                         &psd,
3403                         &size,
3404                         parent_desc,
3405                         owner_sid,
3406                         group_sid,
3407                         fsp->is_directory);
3408         if (!NT_STATUS_IS_OK(status)) {
3409                 return status;
3410         }
3411
3412         /* If inheritable_components == false,
3413            se_create_child_secdesc()
3414            creates a security desriptor with a NULL dacl
3415            entry, but with SEC_DESC_DACL_PRESENT. We need
3416            to remove that flag. */
3417
3418         if (!inheritable_components) {
3419                 security_info_sent &= ~SECINFO_DACL;
3420                 psd->type &= ~SEC_DESC_DACL_PRESENT;
3421         }
3422
3423         if (DEBUGLEVEL >= 10) {
3424                 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3425                         fsp_str_dbg(fsp) ));
3426                 NDR_PRINT_DEBUG(security_descriptor, psd);
3427         }
3428
3429         if (inherit_owner) {
3430                 /* We need to be root to force this. */
3431                 become_root();
3432         }
3433         status = SMB_VFS_FSET_NT_ACL(fsp,
3434                         security_info_sent,
3435                         psd);
3436         if (inherit_owner) {
3437                 unbecome_root();
3438         }
3439         return status;
3440 }
3441
3442 /*
3443  * Wrapper around open_file_ntcreate and open_directory
3444  */
3445
3446 static NTSTATUS create_file_unixpath(connection_struct *conn,
3447                                      struct smb_request *req,
3448                                      struct smb_filename *smb_fname,
3449                                      uint32_t access_mask,
3450                                      uint32_t share_access,
3451                                      uint32_t create_disposition,
3452                                      uint32_t create_options,
3453                                      uint32_t file_attributes,
3454                                      uint32_t oplock_request,
3455                                      uint64_t allocation_size,
3456                                      uint32_t private_flags,
3457                                      struct security_descriptor *sd,
3458                                      struct ea_list *ea_list,
3459
3460                                      files_struct **result,
3461                                      int *pinfo)
3462 {
3463         int info = FILE_WAS_OPENED;
3464         files_struct *base_fsp = NULL;
3465         files_struct *fsp = NULL;
3466         NTSTATUS status;
3467
3468         DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3469                   "file_attributes = 0x%x, share_access = 0x%x, "
3470                   "create_disposition = 0x%x create_options = 0x%x "
3471                   "oplock_request = 0x%x private_flags = 0x%x "
3472                   "ea_list = 0x%p, sd = 0x%p, "
3473                   "fname = %s\n",
3474                   (unsigned int)access_mask,
3475                   (unsigned int)file_attributes,
3476                   (unsigned int)share_access,
3477                   (unsigned int)create_disposition,
3478  &nb