?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
s3: Directly use *p_access_mask in smbd_calculate_maximum_allowed_access
[Samba/gebeck_regimport.git] / source3 / smbd / open.c
blob6d7b634bbb041602fec03c1b781d0f264e8e88ae
1 /*
2 Unix SMB/CIFS implementation.
3 file opening and share modes
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2004
6 Copyright (C) Volker Lendecke 2005
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "system/filesys.h"
24 #include "printing.h"
25 #include "smbd/smbd.h"
26 #include "smbd/globals.h"
27 #include "fake_file.h"
28 #include "../libcli/security/security.h"
29 #include "../librpc/gen_ndr/ndr_security.h"
30 #include "../librpc/gen_ndr/open_files.h"
31 #include "auth.h"
32 #include "messages.h"
33
34 extern const struct generic_mapping file_generic_mapping;
35
36 struct deferred_open_record {
37 bool delayed_for_oplocks;
38 struct file_id id;
39 };
40
41 /****************************************************************************
42 If the requester wanted DELETE_ACCESS and was rejected because
43 the file ACL didn't include DELETE_ACCESS, see if the parent ACL
44 ovverrides this.
45 ****************************************************************************/
46
47 static bool parent_override_delete(connection_struct *conn,
48 const struct smb_filename *smb_fname,
49 uint32_t access_mask,
50 uint32_t rejected_mask)
51 {
52 if ((access_mask & DELETE_ACCESS) &&
53 (rejected_mask & DELETE_ACCESS) &&
54 can_delete_file_in_directory(conn, smb_fname)) {
55 return true;
56 }
57 return false;
58 }
59
60 /****************************************************************************
61 Check if we have open rights.
62 ****************************************************************************/
63
64 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
65 const struct smb_filename *smb_fname,
66 uint32_t access_mask)
67 {
68 /* Check if we have rights to open. */
69 NTSTATUS status;
70 struct security_descriptor *sd = NULL;
71 uint32_t rejected_share_access;
72 uint32_t rejected_mask = access_mask;
73
74 rejected_share_access = access_mask & ~(conn->share_access);
75
76 if (rejected_share_access) {
77 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
78 "on %s (0x%x)\n",
79 (unsigned int)access_mask,
80 smb_fname_str_dbg(smb_fname),
81 (unsigned int)rejected_share_access ));
82 return NT_STATUS_ACCESS_DENIED;
83 }
84
85 if (get_current_uid(conn) == (uid_t)0) {
86 /* I'm sorry sir, I didn't know you were root... */
87 DEBUG(10,("smbd_check_access_rights: root override "
88 "on %s. Granting 0x%x\n",
89 smb_fname_str_dbg(smb_fname),
90 (unsigned int)access_mask ));
91 return NT_STATUS_OK;
92 }
93
94 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
95 DEBUG(10,("smbd_check_access_rights: not checking ACL "
96 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
97 smb_fname_str_dbg(smb_fname),
98 (unsigned int)access_mask ));
99 return NT_STATUS_OK;
100 }
101
102 if (access_mask == DELETE_ACCESS &&
103 VALID_STAT(smb_fname->st) &&
104 S_ISLNK(smb_fname->st.st_ex_mode)) {
105 /* We can always delete a symlink. */
106 DEBUG(10,("smbd_check_access_rights: not checking ACL "
107 "on DELETE_ACCESS on symlink %s.\n",
108 smb_fname_str_dbg(smb_fname) ));
109 return NT_STATUS_OK;
110 }
111
112 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
113 (SECINFO_OWNER |
114 SECINFO_GROUP |
115 SECINFO_DACL),&sd);
116
117 if (!NT_STATUS_IS_OK(status)) {
118 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
119 "on %s: %s\n",
120 smb_fname_str_dbg(smb_fname),
121 nt_errstr(status)));
122
123 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
124 goto access_denied;
125 }
126
127 return status;
128 }
129
130 /*
131 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
132 * owner WRITE_DAC and READ_CONTROL.
133 */
134 status = se_access_check(sd,
135 get_current_nttok(conn),
136 (access_mask & ~FILE_READ_ATTRIBUTES),
137 &rejected_mask);
138
139 DEBUG(10,("smbd_check_access_rights: file %s requesting "
140 "0x%x returning 0x%x (%s)\n",
141 smb_fname_str_dbg(smb_fname),
142 (unsigned int)access_mask,
143 (unsigned int)rejected_mask,
144 nt_errstr(status) ));
145
146 if (!NT_STATUS_IS_OK(status)) {
147 if (DEBUGLEVEL >= 10) {
148 DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
149 smb_fname_str_dbg(smb_fname) ));
150 NDR_PRINT_DEBUG(security_descriptor, sd);
151 }
152 }
153
154 TALLOC_FREE(sd);
155
156 if (NT_STATUS_IS_OK(status) ||
157 !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
158 return status;
159 }
160
161 /* Here we know status == NT_STATUS_ACCESS_DENIED. */
162
163 access_denied:
164
165 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
166 (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
167 (lp_map_readonly(SNUM(conn)) ||
168 lp_map_archive(SNUM(conn)) ||
169 lp_map_hidden(SNUM(conn)) ||
170 lp_map_system(SNUM(conn)))) {
171 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
172
173 DEBUG(10,("smbd_check_access_rights: "
174 "overrode "
175 "FILE_WRITE_ATTRIBUTES "
176 "on file %s\n",
177 smb_fname_str_dbg(smb_fname)));
178 }
179
180 if (parent_override_delete(conn,
181 smb_fname,
182 access_mask,
183 rejected_mask)) {
184 /* Were we trying to do an open
185 * for delete and didn't get DELETE
186 * access (only) ? Check if the
187 * directory allows DELETE_CHILD.
188 * See here:
189 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
190 * for details. */
191
192 rejected_mask &= ~DELETE_ACCESS;
193
194 DEBUG(10,("smbd_check_access_rights: "
195 "overrode "
196 "DELETE_ACCESS on "
197 "file %s\n",
198 smb_fname_str_dbg(smb_fname)));
199 }
200
201 if (rejected_mask != 0) {
202 return NT_STATUS_ACCESS_DENIED;
203 } else {
204 return NT_STATUS_OK;
205 }
206 }
207
208 static NTSTATUS check_parent_access(struct connection_struct *conn,
209 struct smb_filename *smb_fname,
210 uint32_t access_mask,
211 char **pp_parent_dir)
212 {
213 NTSTATUS status;
214 char *parent_dir = NULL;
215 struct security_descriptor *parent_sd = NULL;
216 uint32_t access_granted = 0;
217
218 if (!parent_dirname(talloc_tos(),
219 smb_fname->base_name,
220 &parent_dir,
221 NULL)) {
222 return NT_STATUS_NO_MEMORY;
223 }
224
225 if (pp_parent_dir) {
226 *pp_parent_dir = parent_dir;
227 }
228
229 if (get_current_uid(conn) == (uid_t)0) {
230 /* I'm sorry sir, I didn't know you were root... */
231 DEBUG(10,("check_parent_access: root override "
232 "on %s. Granting 0x%x\n",
233 smb_fname_str_dbg(smb_fname),
234 (unsigned int)access_mask ));
235 return NT_STATUS_OK;
236 }
237
238 status = SMB_VFS_GET_NT_ACL(conn,
239 parent_dir,
240 SECINFO_DACL,
241 &parent_sd);
242
243 if (!NT_STATUS_IS_OK(status)) {
244 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
245 "%s with error %s\n",
246 parent_dir,
247 nt_errstr(status)));
248 return status;
249 }
250
251 /*
252 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
253 * owner WRITE_DAC and READ_CONTROL.
254 */
255 status = se_access_check(parent_sd,
256 get_current_nttok(conn),
257 (access_mask & ~FILE_READ_ATTRIBUTES),
258 &access_granted);
259 if(!NT_STATUS_IS_OK(status)) {
260 DEBUG(5,("check_parent_access: access check "
261 "on directory %s for "
262 "path %s for mask 0x%x returned (0x%x) %s\n",
263 parent_dir,
264 smb_fname->base_name,
265 access_mask,
266 access_granted,
267 nt_errstr(status) ));
268 return status;
269 }
270
271 return NT_STATUS_OK;
272 }
273
274 /****************************************************************************
275 fd support routines - attempt to do a dos_open.
276 ****************************************************************************/
277
278 static NTSTATUS fd_open(struct connection_struct *conn,
279 files_struct *fsp,
280 int flags,
281 mode_t mode)
282 {
283 struct smb_filename *smb_fname = fsp->fsp_name;
284 NTSTATUS status = NT_STATUS_OK;
285
286 #ifdef O_NOFOLLOW
287 /*
288 * Never follow symlinks on a POSIX client. The
289 * client should be doing this.
290 */
291
292 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
293 flags |= O_NOFOLLOW;
294 }
295 #endif
296
297 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
298 if (fsp->fh->fd == -1) {
299 status = map_nt_error_from_unix(errno);
300 if (errno == EMFILE) {
301 static time_t last_warned = 0L;
302
303 if (time((time_t *) NULL) > last_warned) {
304 DEBUG(0,("Too many open files, unable "
305 "to open more! smbd's max "
306 "open files = %d\n",
307 lp_max_open_files()));
308 last_warned = time((time_t *) NULL);
309 }
310 }
311
312 }
313
314 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
315 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
316 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
317
318 return status;
319 }
320
321 /****************************************************************************
322 Close the file associated with a fsp.
323 ****************************************************************************/
324
325 NTSTATUS fd_close(files_struct *fsp)
326 {
327 int ret;
328
329 if (fsp->dptr) {
330 dptr_CloseDir(fsp);
331 }
332 if (fsp->fh->fd == -1) {
333 return NT_STATUS_OK; /* What we used to call a stat open. */
334 }
335 if (fsp->fh->ref_count > 1) {
336 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
337 }
338
339 ret = SMB_VFS_CLOSE(fsp);
340 fsp->fh->fd = -1;
341 if (ret == -1) {
342 return map_nt_error_from_unix(errno);
343 }
344 return NT_STATUS_OK;
345 }
346
347 /****************************************************************************
348 Change the ownership of a file to that of the parent directory.
349 Do this by fd if possible.
350 ****************************************************************************/
351
352 void change_file_owner_to_parent(connection_struct *conn,
353 const char *inherit_from_dir,
354 files_struct *fsp)
355 {
356 struct smb_filename *smb_fname_parent = NULL;
357 NTSTATUS status;
358 int ret;
359
360 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
361 NULL, NULL, &smb_fname_parent);
362 if (!NT_STATUS_IS_OK(status)) {
363 return;
364 }
365
366 ret = SMB_VFS_STAT(conn, smb_fname_parent);
367 if (ret == -1) {
368 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
369 "directory %s. Error was %s\n",
370 smb_fname_str_dbg(smb_fname_parent),
371 strerror(errno)));
372 TALLOC_FREE(smb_fname_parent);
373 return;
374 }
375
376 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
377 /* Already this uid - no need to change. */
378 DEBUG(10,("change_file_owner_to_parent: file %s "
379 "is already owned by uid %d\n",
380 fsp_str_dbg(fsp),
381 (int)fsp->fsp_name->st.st_ex_uid ));
382 TALLOC_FREE(smb_fname_parent);
383 return;
384 }
385
386 become_root();
387 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
388 unbecome_root();
389 if (ret == -1) {
390 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
391 "file %s to parent directory uid %u. Error "
392 "was %s\n", fsp_str_dbg(fsp),
393 (unsigned int)smb_fname_parent->st.st_ex_uid,
394 strerror(errno) ));
395 } else {
396 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
397 "parent directory uid %u.\n", fsp_str_dbg(fsp),
398 (unsigned int)smb_fname_parent->st.st_ex_uid));
399 /* Ensure the uid entry is updated. */
400 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
401 }
402
403 TALLOC_FREE(smb_fname_parent);
404 }
405
406 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
407 const char *inherit_from_dir,
408 const char *fname,
409 SMB_STRUCT_STAT *psbuf)
410 {
411 struct smb_filename *smb_fname_parent = NULL;
412 struct smb_filename *smb_fname_cwd = NULL;
413 char *saved_dir = NULL;
414 TALLOC_CTX *ctx = talloc_tos();
415 NTSTATUS status = NT_STATUS_OK;
416 int ret;
417
418 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
419 &smb_fname_parent);
420 if (!NT_STATUS_IS_OK(status)) {
421 return status;
422 }
423
424 ret = SMB_VFS_STAT(conn, smb_fname_parent);
425 if (ret == -1) {
426 status = map_nt_error_from_unix(errno);
427 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
428 "directory %s. Error was %s\n",
429 smb_fname_str_dbg(smb_fname_parent),
430 strerror(errno)));
431 goto out;
432 }
433
434 /* We've already done an lstat into psbuf, and we know it's a
435 directory. If we can cd into the directory and the dev/ino
436 are the same then we can safely chown without races as
437 we're locking the directory in place by being in it. This
438 should work on any UNIX (thanks tridge :-). JRA.
439 */
440
441 saved_dir = vfs_GetWd(ctx,conn);
442 if (!saved_dir) {
443 status = map_nt_error_from_unix(errno);
444 DEBUG(0,("change_dir_owner_to_parent: failed to get "
445 "current working directory. Error was %s\n",
446 strerror(errno)));
447 goto out;
448 }
449
450 /* Chdir into the new path. */
451 if (vfs_ChDir(conn, fname) == -1) {
452 status = map_nt_error_from_unix(errno);
453 DEBUG(0,("change_dir_owner_to_parent: failed to change "
454 "current working directory to %s. Error "
455 "was %s\n", fname, strerror(errno) ));
456 goto chdir;
457 }
458
459 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
460 &smb_fname_cwd);
461 if (!NT_STATUS_IS_OK(status)) {
462 return status;
463 }
464
465 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
466 if (ret == -1) {
467 status = map_nt_error_from_unix(errno);
468 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
469 "directory '.' (%s) Error was %s\n",
470 fname, strerror(errno)));
471 goto chdir;
472 }
473
474 /* Ensure we're pointing at the same place. */
475 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
476 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
477 DEBUG(0,("change_dir_owner_to_parent: "
478 "device/inode on directory %s changed. "
479 "Refusing to chown !\n", fname ));
480 status = NT_STATUS_ACCESS_DENIED;
481 goto chdir;
482 }
483
484 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
485 /* Already this uid - no need to change. */
486 DEBUG(10,("change_dir_owner_to_parent: directory %s "
487 "is already owned by uid %d\n",
488 fname,
489 (int)smb_fname_cwd->st.st_ex_uid ));
490 status = NT_STATUS_OK;
491 goto chdir;
492 }
493
494 become_root();
495 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
496 (gid_t)-1);
497 unbecome_root();
498 if (ret == -1) {
499 status = map_nt_error_from_unix(errno);
500 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
501 "directory %s to parent directory uid %u. "
502 "Error was %s\n", fname,
503 (unsigned int)smb_fname_parent->st.st_ex_uid,
504 strerror(errno) ));
505 } else {
506 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
507 "directory %s to parent directory uid %u.\n",
508 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
509 /* Ensure the uid entry is updated. */
510 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
511 }
512
513 chdir:
514 vfs_ChDir(conn,saved_dir);
515 out:
516 TALLOC_FREE(smb_fname_parent);
517 TALLOC_FREE(smb_fname_cwd);
518 return status;
519 }
520
521 /****************************************************************************
522 Open a file.
523 ****************************************************************************/
524
525 static NTSTATUS open_file(files_struct *fsp,
526 connection_struct *conn,
527 struct smb_request *req,
528 const char *parent_dir,
529 int flags,
530 mode_t unx_mode,
531 uint32 access_mask, /* client requested access mask. */
532 uint32 open_access_mask) /* what we're actually using in the open. */
533 {
534 struct smb_filename *smb_fname = fsp->fsp_name;
535 NTSTATUS status = NT_STATUS_OK;
536 int accmode = (flags & O_ACCMODE);
537 int local_flags = flags;
538 bool file_existed = VALID_STAT(fsp->fsp_name->st);
539 bool file_created = false;
540
541 fsp->fh->fd = -1;
542 errno = EPERM;
543
544 /* Check permissions */
545
546 /*
547 * This code was changed after seeing a client open request
548 * containing the open mode of (DENY_WRITE/read-only) with
549 * the 'create if not exist' bit set. The previous code
550 * would fail to open the file read only on a read-only share
551 * as it was checking the flags parameter directly against O_RDONLY,
552 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
553 * JRA.
554 */
555
556 if (!CAN_WRITE(conn)) {
557 /* It's a read-only share - fail if we wanted to write. */
558 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
559 DEBUG(3,("Permission denied opening %s\n",
560 smb_fname_str_dbg(smb_fname)));
561 return NT_STATUS_ACCESS_DENIED;
562 } else if(flags & O_CREAT) {
563 /* We don't want to write - but we must make sure that
564 O_CREAT doesn't create the file if we have write
565 access into the directory.
566 */
567 flags &= ~(O_CREAT|O_EXCL);
568 local_flags &= ~(O_CREAT|O_EXCL);
569 }
570 }
571
572 /*
573 * This little piece of insanity is inspired by the
574 * fact that an NT client can open a file for O_RDONLY,
575 * but set the create disposition to FILE_EXISTS_TRUNCATE.
576 * If the client *can* write to the file, then it expects to
577 * truncate the file, even though it is opening for readonly.
578 * Quicken uses this stupid trick in backup file creation...
579 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
580 * for helping track this one down. It didn't bite us in 2.0.x
581 * as we always opened files read-write in that release. JRA.
582 */
583
584 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
585 DEBUG(10,("open_file: truncate requested on read-only open "
586 "for file %s\n", smb_fname_str_dbg(smb_fname)));
587 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
588 }
589
590 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
591 (!file_existed && (local_flags & O_CREAT)) ||
592 ((local_flags & O_TRUNC) == O_TRUNC) ) {
593 const char *wild;
594
595 /*
596 * We can't actually truncate here as the file may be locked.
597 * open_file_ntcreate will take care of the truncate later. JRA.
598 */
599
600 local_flags &= ~O_TRUNC;
601
602 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
603 /*
604 * We would block on opening a FIFO with no one else on the
605 * other end. Do what we used to do and add O_NONBLOCK to the
606 * open flags. JRA.
607 */
608
609 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
610 local_flags |= O_NONBLOCK;
611 }
612 #endif
613
614 /* Don't create files with Microsoft wildcard characters. */
615 if (fsp->base_fsp) {
616 /*
617 * wildcard characters are allowed in stream names
618 * only test the basefilename
619 */
620 wild = fsp->base_fsp->fsp_name->base_name;
621 } else {
622 wild = smb_fname->base_name;
623 }
624 if ((local_flags & O_CREAT) && !file_existed &&
625 ms_has_wild(wild)) {
626 return NT_STATUS_OBJECT_NAME_INVALID;
627 }
628
629 /* Can we access this file ? */
630 if (!fsp->base_fsp) {
631 /* Only do this check on non-stream open. */
632 if (file_existed) {
633 status = smbd_check_access_rights(conn,
634 smb_fname,
635 access_mask);
636 } else if (local_flags & O_CREAT){
637 status = check_parent_access(conn,
638 smb_fname,
639 SEC_DIR_ADD_FILE,
640 NULL);
641 } else {
642 /* File didn't exist and no O_CREAT. */
643 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
644 }
645 if (!NT_STATUS_IS_OK(status)) {
646 DEBUG(10,("open_file: "
647 "%s on file "
648 "%s returned %s\n",
649 file_existed ?
650 "smbd_check_access_rights" :
651 "check_parent_access",
652 smb_fname_str_dbg(smb_fname),
653 nt_errstr(status) ));
654 return status;
655 }
656 }
657
658 /* Actually do the open */
659 status = fd_open(conn, fsp, local_flags, unx_mode);
660 if (!NT_STATUS_IS_OK(status)) {
661 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
662 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
663 nt_errstr(status),local_flags,flags));
664 return status;
665 }
666
667 if ((local_flags & O_CREAT) && !file_existed) {
668 file_created = true;
669 }
670
671 } else {
672 fsp->fh->fd = -1; /* What we used to call a stat open. */
673 if (!file_existed) {
674 /* File must exist for a stat open. */
675 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
676 }
677
678 status = smbd_check_access_rights(conn,
679 smb_fname,
680 access_mask);
681
682 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
683 fsp->posix_open &&
684 S_ISLNK(smb_fname->st.st_ex_mode)) {
685 /* This is a POSIX stat open for delete
686 * or rename on a symlink that points
687 * nowhere. Allow. */
688 DEBUG(10,("open_file: allowing POSIX "
689 "open on bad symlink %s\n",
690 smb_fname_str_dbg(smb_fname)));
691 status = NT_STATUS_OK;
692 }
693
694 if (!NT_STATUS_IS_OK(status)) {
695 DEBUG(10,("open_file: "
696 "smbd_check_access_rights on file "
697 "%s returned %s\n",
698 smb_fname_str_dbg(smb_fname),
699 nt_errstr(status) ));
700 return status;
701 }
702 }
703
704 if (!file_existed) {
705 int ret;
706
707 if (fsp->fh->fd == -1) {
708 ret = SMB_VFS_STAT(conn, smb_fname);
709 } else {
710 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
711 /* If we have an fd, this stat should succeed. */
712 if (ret == -1) {
713 DEBUG(0,("Error doing fstat on open file %s "
714 "(%s)\n",
715 smb_fname_str_dbg(smb_fname),
716 strerror(errno) ));
717 }
718 }
719
720 /* For a non-io open, this stat failing means file not found. JRA */
721 if (ret == -1) {
722 status = map_nt_error_from_unix(errno);
723 fd_close(fsp);
724 return status;
725 }
726
727 if (file_created) {
728 bool need_re_stat = false;
729 /* Do all inheritance work after we've
730 done a successful stat call and filled
731 in the stat struct in fsp->fsp_name. */
732
733 /* Inherit the ACL if required */
734 if (lp_inherit_perms(SNUM(conn))) {
735 inherit_access_posix_acl(conn, parent_dir,
736 smb_fname->base_name,
737 unx_mode);
738 need_re_stat = true;
739 }
740
741 /* Change the owner if required. */
742 if (lp_inherit_owner(SNUM(conn))) {
743 change_file_owner_to_parent(conn, parent_dir,
744 fsp);
745 need_re_stat = true;
746 }
747
748 if (need_re_stat) {
749 if (fsp->fh->fd == -1) {
750 ret = SMB_VFS_STAT(conn, smb_fname);
751 } else {
752 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
753 /* If we have an fd, this stat should succeed. */
754 if (ret == -1) {
755 DEBUG(0,("Error doing fstat on open file %s "
756 "(%s)\n",
757 smb_fname_str_dbg(smb_fname),
758 strerror(errno) ));
759 }
760 }
761 }
762
763 notify_fname(conn, NOTIFY_ACTION_ADDED,
764 FILE_NOTIFY_CHANGE_FILE_NAME,
765 smb_fname->base_name);
766 }
767 }
768
769 /*
770 * POSIX allows read-only opens of directories. We don't
771 * want to do this (we use a different code path for this)
772 * so catch a directory open and return an EISDIR. JRA.
773 */
774
775 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
776 fd_close(fsp);
777 errno = EISDIR;
778 return NT_STATUS_FILE_IS_A_DIRECTORY;
779 }
780
781 fsp->mode = smb_fname->st.st_ex_mode;
782 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
783 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
784 fsp->file_pid = req ? req->smbpid : 0;
785 fsp->can_lock = True;
786 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
787 if (!CAN_WRITE(conn)) {
788 fsp->can_write = False;
789 } else {
790 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
791 True : False;
792 }
793 fsp->print_file = NULL;
794 fsp->modified = False;
795 fsp->sent_oplock_break = NO_BREAK_SENT;
796 fsp->is_directory = False;
797 if (conn->aio_write_behind_list &&
798 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
799 conn->case_sensitive)) {
800 fsp->aio_write_behind = True;
801 }
802
803 fsp->wcp = NULL; /* Write cache pointer. */
804
805 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
806 conn->session_info->unix_info->unix_name,
807 smb_fname_str_dbg(smb_fname),
808 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
809 conn->num_files_open));
810
811 errno = 0;
812 return NT_STATUS_OK;
813 }
814
815 /****************************************************************************
816 Check if we can open a file with a share mode.
817 Returns True if conflict, False if not.
818 ****************************************************************************/
819
820 static bool share_conflict(struct share_mode_entry *entry,
821 uint32 access_mask,
822 uint32 share_access)
823 {
824 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
825 "entry->share_access = 0x%x, "
826 "entry->private_options = 0x%x\n",
827 (unsigned int)entry->access_mask,
828 (unsigned int)entry->share_access,
829 (unsigned int)entry->private_options));
830
831 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
832 (unsigned int)access_mask, (unsigned int)share_access));
833
834 if ((entry->access_mask & (FILE_WRITE_DATA|
835 FILE_APPEND_DATA|
836 FILE_READ_DATA|
837 FILE_EXECUTE|
838 DELETE_ACCESS)) == 0) {
839 DEBUG(10,("share_conflict: No conflict due to "
840 "entry->access_mask = 0x%x\n",
841 (unsigned int)entry->access_mask ));
842 return False;
843 }
844
845 if ((access_mask & (FILE_WRITE_DATA|
846 FILE_APPEND_DATA|
847 FILE_READ_DATA|
848 FILE_EXECUTE|
849 DELETE_ACCESS)) == 0) {
850 DEBUG(10,("share_conflict: No conflict due to "
851 "access_mask = 0x%x\n",
852 (unsigned int)access_mask ));
853 return False;
854 }
855
856 #if 1 /* JRA TEST - Superdebug. */
857 #define CHECK_MASK(num, am, right, sa, share) \
858 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
859 (unsigned int)(num), (unsigned int)(am), \
860 (unsigned int)(right), (unsigned int)(am)&(right) )); \
861 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
862 (unsigned int)(num), (unsigned int)(sa), \
863 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
864 if (((am) & (right)) && !((sa) & (share))) { \
865 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
866 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
867 (unsigned int)(share) )); \
868 return True; \
869 }
870 #else
871 #define CHECK_MASK(num, am, right, sa, share) \
872 if (((am) & (right)) && !((sa) & (share))) { \
873 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
874 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
875 (unsigned int)(share) )); \
876 return True; \
877 }
878 #endif
879
880 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
881 share_access, FILE_SHARE_WRITE);
882 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
883 entry->share_access, FILE_SHARE_WRITE);
884
885 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
886 share_access, FILE_SHARE_READ);
887 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
888 entry->share_access, FILE_SHARE_READ);
889
890 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
891 share_access, FILE_SHARE_DELETE);
892 CHECK_MASK(6, access_mask, DELETE_ACCESS,
893 entry->share_access, FILE_SHARE_DELETE);
894
895 DEBUG(10,("share_conflict: No conflict.\n"));
896 return False;
897 }
898
899 #if defined(DEVELOPER)
900 static void validate_my_share_entries(struct smbd_server_connection *sconn,
901 int num,
902 struct share_mode_entry *share_entry)
903 {
904 files_struct *fsp;
905
906 if (!procid_is_me(&share_entry->pid)) {
907 return;
908 }
909
910 if (is_deferred_open_entry(share_entry) &&
911 !open_was_deferred(sconn, share_entry->op_mid)) {
912 char *str = talloc_asprintf(talloc_tos(),
913 "Got a deferred entry without a request: "
914 "PANIC: %s\n",
915 share_mode_str(talloc_tos(), num, share_entry));
916 smb_panic(str);
917 }
918
919 if (!is_valid_share_mode_entry(share_entry)) {
920 return;
921 }
922
923 fsp = file_find_dif(sconn, share_entry->id,
924 share_entry->share_file_id);
925 if (!fsp) {
926 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
927 share_mode_str(talloc_tos(), num, share_entry) ));
928 smb_panic("validate_my_share_entries: Cannot match a "
929 "share entry with an open file\n");
930 }
931
932 if (is_deferred_open_entry(share_entry)) {
933 goto panic;
934 }
935
936 if ((share_entry->op_type == NO_OPLOCK) &&
937 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
938 /* Someone has already written to it, but I haven't yet
939 * noticed */
940 return;
941 }
942
943 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
944 goto panic;
945 }
946
947 return;
948
949 panic:
950 {
951 char *str;
952 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
953 share_mode_str(talloc_tos(), num, share_entry) ));
954 str = talloc_asprintf(talloc_tos(),
955 "validate_my_share_entries: "
956 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
957 fsp->fsp_name->base_name,
958 (unsigned int)fsp->oplock_type,
959 (unsigned int)share_entry->op_type );
960 smb_panic(str);
961 }
962 }
963 #endif
964
965 bool is_stat_open(uint32 access_mask)
966 {
967 return (access_mask &&
968 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
969 FILE_WRITE_ATTRIBUTES))==0) &&
970 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
971 FILE_WRITE_ATTRIBUTES)) != 0));
972 }
973
974 /****************************************************************************
975 Deal with share modes
976 Invarient: Share mode must be locked on entry and exit.
977 Returns -1 on error, or number of share modes on success (may be zero).
978 ****************************************************************************/
979
980 static NTSTATUS open_mode_check(connection_struct *conn,
981 struct share_mode_lock *lck,
982 uint32_t name_hash,
983 uint32 access_mask,
984 uint32 share_access,
985 uint32 create_options,
986 bool *file_existed)
987 {
988 int i;
989
990 if(lck->num_share_modes == 0) {
991 return NT_STATUS_OK;
992 }
993
994 *file_existed = True;
995
996 /* A delete on close prohibits everything */
997
998 if (is_delete_on_close_set(lck, name_hash)) {
999 return NT_STATUS_DELETE_PENDING;
1000 }
1001
1002 if (is_stat_open(access_mask)) {
1003 /* Stat open that doesn't trigger oplock breaks or share mode
1004 * checks... ! JRA. */
1005 return NT_STATUS_OK;
1006 }
1007
1008 /*
1009 * Check if the share modes will give us access.
1010 */
1011
1012 #if defined(DEVELOPER)
1013 for(i = 0; i < lck->num_share_modes; i++) {
1014 validate_my_share_entries(conn->sconn, i,
1015 &lck->share_modes[i]);
1016 }
1017 #endif
1018
1019 if (!lp_share_modes(SNUM(conn))) {
1020 return NT_STATUS_OK;
1021 }
1022
1023 /* Now we check the share modes, after any oplock breaks. */
1024 for(i = 0; i < lck->num_share_modes; i++) {
1025
1026 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1027 continue;
1028 }
1029
1030 /* someone else has a share lock on it, check to see if we can
1031 * too */
1032 if (share_conflict(&lck->share_modes[i],
1033 access_mask, share_access)) {
1034 return NT_STATUS_SHARING_VIOLATION;
1035 }
1036 }
1037
1038 return NT_STATUS_OK;
1039 }
1040
1041 static bool is_delete_request(files_struct *fsp) {
1042 return ((fsp->access_mask == DELETE_ACCESS) &&
1043 (fsp->oplock_type == NO_OPLOCK));
1044 }
1045
1046 /*
1047 * Send a break message to the oplock holder and delay the open for
1048 * our client.
1049 */
1050
1051 static NTSTATUS send_break_message(files_struct *fsp,
1052 struct share_mode_entry *exclusive,
1053 uint64_t mid,
1054 int oplock_request)
1055 {
1056 NTSTATUS status;
1057 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1058
1059 DEBUG(10, ("Sending break request to PID %s\n",
1060 procid_str_static(&exclusive->pid)));
1061 exclusive->op_mid = mid;
1062
1063 /* Create the message. */
1064 share_mode_entry_to_message(msg, exclusive);
1065
1066 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1067 don't want this set in the share mode struct pointed to by lck. */
1068
1069 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1070 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1071 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1072 }
1073
1074 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1075 MSG_SMB_BREAK_REQUEST,
1076 (uint8 *)msg,
1077 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1078 if (!NT_STATUS_IS_OK(status)) {
1079 DEBUG(3, ("Could not send oplock break message: %s\n",
1080 nt_errstr(status)));
1081 }
1082
1083 return status;
1084 }
1085
1086 /*
1087 * Return share_mode_entry pointers for :
1088 * 1). Batch oplock entry.
1089 * 2). Batch or exclusive oplock entry (may be identical to #1).
1090 * bool have_level2_oplock
1091 * bool have_no_oplock.
1092 * Do internal consistency checks on the share mode for a file.
1093 */
1094
1095 static void find_oplock_types(files_struct *fsp,
1096 int oplock_request,
1097 const struct share_mode_lock *lck,
1098 struct share_mode_entry **pp_batch,
1099 struct share_mode_entry **pp_ex_or_batch,
1100 bool *got_level2,
1101 bool *got_no_oplock)
1102 {
1103 int i;
1104
1105 *pp_batch = NULL;
1106 *pp_ex_or_batch = NULL;
1107 *got_level2 = false;
1108 *got_no_oplock = false;
1109
1110 /* Ignore stat or internal opens, as is done in
1111 delay_for_batch_oplocks() and
1112 delay_for_exclusive_oplocks().
1113 */
1114 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1115 return;
1116 }
1117
1118 for (i=0; i<lck->num_share_modes; i++) {
1119 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1120 continue;
1121 }
1122
1123 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1124 is_stat_open(lck->share_modes[i].access_mask)) {
1125 /* We ignore stat opens in the table - they
1126 always have NO_OPLOCK and never get or
1127 cause breaks. JRA. */
1128 continue;
1129 }
1130
1131 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1132 /* batch - can only be one. */
1133 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1134 smb_panic("Bad batch oplock entry.");
1135 }
1136 *pp_batch = &lck->share_modes[i];
1137 }
1138
1139 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1140 /* Exclusive or batch - can only be one. */
1141 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1142 smb_panic("Bad exclusive or batch oplock entry.");
1143 }
1144 *pp_ex_or_batch = &lck->share_modes[i];
1145 }
1146
1147 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1148 if (*pp_batch || *pp_ex_or_batch) {
1149 smb_panic("Bad levelII oplock entry.");
1150 }
1151 *got_level2 = true;
1152 }
1153
1154 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1155 if (*pp_batch || *pp_ex_or_batch) {
1156 smb_panic("Bad no oplock entry.");
1157 }
1158 *got_no_oplock = true;
1159 }
1160 }
1161 }
1162
1163 static bool delay_for_batch_oplocks(files_struct *fsp,
1164 uint64_t mid,
1165 int oplock_request,
1166 struct share_mode_entry *batch_entry)
1167 {
1168 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1169 return false;
1170 }
1171 if (batch_entry == NULL) {
1172 return false;
1173 }
1174
1175 /* Found a batch oplock */
1176 send_break_message(fsp, batch_entry, mid, oplock_request);
1177 return true;
1178 }
1179
1180 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1181 uint64_t mid,
1182 int oplock_request,
1183 struct share_mode_entry *ex_entry)
1184 {
1185 bool delay_it;
1186
1187 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1188 return false;
1189 }
1190 if (ex_entry == NULL) {
1191 return false;
1192 }
1193
1194 /* Found an exclusive or batch oplock */
1195
1196 delay_it = is_delete_request(fsp) ?
1197 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1198
1199 if (!delay_it) {
1200 return false;
1201 }
1202
1203 send_break_message(fsp, ex_entry, mid, oplock_request);
1204 return true;
1205 }
1206
1207 static void grant_fsp_oplock_type(files_struct *fsp,
1208 const struct byte_range_lock *br_lck,
1209 int oplock_request,
1210 bool got_level2_oplock,
1211 bool got_a_none_oplock)
1212 {
1213 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1214 lp_level2_oplocks(SNUM(fsp->conn));
1215
1216 /* Start by granting what the client asked for,
1217 but ensure no SAMBA_PRIVATE bits can be set. */
1218 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1219
1220 if (oplock_request & INTERNAL_OPEN_ONLY) {
1221 /* No oplocks on internal open. */
1222 fsp->oplock_type = NO_OPLOCK;
1223 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1224 fsp->oplock_type, fsp_str_dbg(fsp)));
1225 return;
1226 } else if (br_lck && br_lck->num_locks > 0) {
1227 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1228 fsp_str_dbg(fsp)));
1229 fsp->oplock_type = NO_OPLOCK;
1230 }
1231
1232 if (is_stat_open(fsp->access_mask)) {
1233 /* Leave the value already set. */
1234 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1235 fsp->oplock_type, fsp_str_dbg(fsp)));
1236 return;
1237 }
1238
1239 /*
1240 * Match what was requested (fsp->oplock_type) with
1241 * what was found in the existing share modes.
1242 */
1243
1244 if (got_a_none_oplock) {
1245 fsp->oplock_type = NO_OPLOCK;
1246 } else if (got_level2_oplock) {
1247 if (fsp->oplock_type == NO_OPLOCK ||
1248 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1249 /* Store a level2 oplock, but don't tell the client */
1250 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1251 } else {
1252 fsp->oplock_type = LEVEL_II_OPLOCK;
1253 }
1254 } else {
1255 /* All share_mode_entries are placeholders or deferred.
1256 * Silently upgrade to fake levelII if the client didn't
1257 * ask for an oplock. */
1258 if (fsp->oplock_type == NO_OPLOCK) {
1259 /* Store a level2 oplock, but don't tell the client */
1260 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1261 }
1262 }
1263
1264 /*
1265 * Don't grant level2 to clients that don't want them
1266 * or if we've turned them off.
1267 */
1268 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1269 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1270 }
1271
1272 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1273 fsp->oplock_type, fsp_str_dbg(fsp)));
1274 }
1275
1276 bool request_timed_out(struct timeval request_time,
1277 struct timeval timeout)
1278 {
1279 struct timeval now, end_time;
1280 GetTimeOfDay(&now);
1281 end_time = timeval_sum(&request_time, &timeout);
1282 return (timeval_compare(&end_time, &now) < 0);
1283 }
1284
1285 /****************************************************************************
1286 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1287 ****************************************************************************/
1288
1289 static void defer_open(struct share_mode_lock *lck,
1290 struct timeval request_time,
1291 struct timeval timeout,
1292 struct smb_request *req,
1293 struct deferred_open_record *state)
1294 {
1295 int i;
1296
1297 /* Paranoia check */
1298
1299 for (i=0; i<lck->num_share_modes; i++) {
1300 struct share_mode_entry *e = &lck->share_modes[i];
1301
1302 if (is_deferred_open_entry(e) &&
1303 procid_is_me(&e->pid) &&
1304 (e->op_mid == req->mid)) {
1305 DEBUG(0, ("Trying to defer an already deferred "
1306 "request: mid=%llu, exiting\n",
1307 (unsigned long long)req->mid));
1308 exit_server("attempt to defer a deferred request");
1309 }
1310 }
1311
1312 /* End paranoia check */
1313
1314 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1315 "open entry for mid %llu\n",
1316 (unsigned int)request_time.tv_sec,
1317 (unsigned int)request_time.tv_usec,
1318 (unsigned long long)req->mid));
1319
1320 if (!push_deferred_open_message_smb(req, request_time, timeout,
1321 state->id, (char *)state, sizeof(*state))) {
1322 exit_server("push_deferred_open_message_smb failed");
1323 }
1324 add_deferred_open(lck, req->mid, request_time,
1325 messaging_server_id(req->sconn->msg_ctx), state->id);
1326 }
1327
1328
1329 /****************************************************************************
1330 On overwrite open ensure that the attributes match.
1331 ****************************************************************************/
1332
1333 bool open_match_attributes(connection_struct *conn,
1334 uint32 old_dos_attr,
1335 uint32 new_dos_attr,
1336 mode_t existing_unx_mode,
1337 mode_t new_unx_mode,
1338 mode_t *returned_unx_mode)
1339 {
1340 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1341
1342 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1343 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1344
1345 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1346 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1347 *returned_unx_mode = new_unx_mode;
1348 } else {
1349 *returned_unx_mode = (mode_t)0;
1350 }
1351
1352 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1353 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1354 "returned_unx_mode = 0%o\n",
1355 (unsigned int)old_dos_attr,
1356 (unsigned int)existing_unx_mode,
1357 (unsigned int)new_dos_attr,
1358 (unsigned int)*returned_unx_mode ));
1359
1360 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1361 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1362 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1363 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1364 return False;
1365 }
1366 }
1367 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1368 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1369 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1370 return False;
1371 }
1372 }
1373 return True;
1374 }
1375
1376 /****************************************************************************
1377 Special FCB or DOS processing in the case of a sharing violation.
1378 Try and find a duplicated file handle.
1379 ****************************************************************************/
1380
1381 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1382 connection_struct *conn,
1383 files_struct *fsp_to_dup_into,
1384 const struct smb_filename *smb_fname,
1385 struct file_id id,
1386 uint16 file_pid,
1387 uint16 vuid,
1388 uint32 access_mask,
1389 uint32 share_access,
1390 uint32 create_options)
1391 {
1392 files_struct *fsp;
1393
1394 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1395 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1396
1397 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1398 fsp = file_find_di_next(fsp)) {
1399
1400 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1401 "vuid = %u, file_pid = %u, private_options = 0x%x "
1402 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1403 fsp->fh->fd, (unsigned int)fsp->vuid,
1404 (unsigned int)fsp->file_pid,
1405 (unsigned int)fsp->fh->private_options,
1406 (unsigned int)fsp->access_mask ));
1407
1408 if (fsp->fh->fd != -1 &&
1409 fsp->vuid == vuid &&
1410 fsp->file_pid == file_pid &&
1411 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1412 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1413 (fsp->access_mask & FILE_WRITE_DATA) &&
1414 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1415 strequal(fsp->fsp_name->stream_name,
1416 smb_fname->stream_name)) {
1417 DEBUG(10,("fcb_or_dos_open: file match\n"));
1418 break;
1419 }
1420 }
1421
1422 if (!fsp) {
1423 return NT_STATUS_NOT_FOUND;
1424 }
1425
1426 /* quite an insane set of semantics ... */
1427 if (is_executable(smb_fname->base_name) &&
1428 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1429 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1430 return NT_STATUS_INVALID_PARAMETER;
1431 }
1432
1433 /* We need to duplicate this fsp. */
1434 return dup_file_fsp(req, fsp, access_mask, share_access,
1435 create_options, fsp_to_dup_into);
1436 }
1437
1438 static void schedule_defer_open(struct share_mode_lock *lck,
1439 struct timeval request_time,
1440 struct smb_request *req)
1441 {
1442 struct deferred_open_record state;
1443
1444 /* This is a relative time, added to the absolute
1445 request_time value to get the absolute timeout time.
1446 Note that if this is the second or greater time we enter
1447 this codepath for this particular request mid then
1448 request_time is left as the absolute time of the *first*
1449 time this request mid was processed. This is what allows
1450 the request to eventually time out. */
1451
1452 struct timeval timeout;
1453
1454 /* Normally the smbd we asked should respond within
1455 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1456 * the client did, give twice the timeout as a safety
1457 * measure here in case the other smbd is stuck
1458 * somewhere else. */
1459
1460 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1461
1462 /* Nothing actually uses state.delayed_for_oplocks
1463 but it's handy to differentiate in debug messages
1464 between a 30 second delay due to oplock break, and
1465 a 1 second delay for share mode conflicts. */
1466
1467 state.delayed_for_oplocks = True;
1468 state.id = lck->id;
1469
1470 if (!request_timed_out(request_time, timeout)) {
1471 defer_open(lck, request_time, timeout, req, &state);
1472 }
1473 }
1474
1475 /****************************************************************************
1476 Work out what access_mask to use from what the client sent us.
1477 ****************************************************************************/
1478
1479 static NTSTATUS smbd_calculate_maximum_allowed_access(
1480 connection_struct *conn,
1481 const struct smb_filename *smb_fname,
1482 bool file_existed,
1483 uint32_t *p_access_mask)
1484 {
1485 NTSTATUS status;
1486
1487 if (get_current_uid(conn) == (uid_t)0) {
1488 *p_access_mask |= FILE_GENERIC_ALL;
1489 } else if (file_existed) {
1490 struct security_descriptor *sd;
1491 uint32_t access_granted = 0;
1492
1493 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1494 (SECINFO_OWNER |
1495 SECINFO_GROUP |
1496 SECINFO_DACL),&sd);
1497
1498 if (!NT_STATUS_IS_OK(status)) {
1499 DEBUG(10,("smbd_calculate_access_mask: "
1500 "Could not get acl on file %s: %s\n",
1501 smb_fname_str_dbg(smb_fname),
1502 nt_errstr(status)));
1503 return NT_STATUS_ACCESS_DENIED;
1504 }
1505
1506 /*
1507 * Never test FILE_READ_ATTRIBUTES. se_access_check()
1508 * also takes care of owner WRITE_DAC and READ_CONTROL.
1509 */
1510 status = se_access_check(sd,
1511 get_current_nttok(conn),
1512 (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1513 &access_granted);
1514
1515 TALLOC_FREE(sd);
1516
1517 if (!NT_STATUS_IS_OK(status)) {
1518 DEBUG(10, ("smbd_calculate_access_mask: "
1519 "Access denied on file %s: "
1520 "when calculating maximum access\n",
1521 smb_fname_str_dbg(smb_fname)));
1522 return NT_STATUS_ACCESS_DENIED;
1523 }
1524
1525 *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1526 } else {
1527 *p_access_mask = FILE_GENERIC_ALL;
1528 }
1529 return NT_STATUS_OK;
1530 }
1531
1532 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1533 const struct smb_filename *smb_fname,
1534 bool file_existed,
1535 uint32_t access_mask,
1536 uint32_t *access_mask_out)
1537 {
1538 NTSTATUS status;
1539 uint32_t orig_access_mask = access_mask;
1540 uint32_t rejected_share_access;
1541
1542 /*
1543 * Convert GENERIC bits to specific bits.
1544 */
1545
1546 se_map_generic(&access_mask, &file_generic_mapping);
1547
1548 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1549 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1550
1551 status = smbd_calculate_maximum_allowed_access(
1552 conn, smb_fname, file_existed, &access_mask);
1553
1554 if (!NT_STATUS_IS_OK(status)) {
1555 return status;
1556 }
1557
1558 access_mask &= conn->share_access;
1559 }
1560
1561 rejected_share_access = access_mask & ~(conn->share_access);
1562
1563 if (rejected_share_access) {
1564 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1565 "file %s: rejected by share access mask[0x%08X] "
1566 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1567 smb_fname_str_dbg(smb_fname),
1568 conn->share_access,
1569 orig_access_mask, access_mask,
1570 rejected_share_access));
1571 return NT_STATUS_ACCESS_DENIED;
1572 }
1573
1574 *access_mask_out = access_mask;
1575 return NT_STATUS_OK;
1576 }
1577
1578 /****************************************************************************
1579 Remove the deferred open entry under lock.
1580 ****************************************************************************/
1581
1582 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1583 struct server_id pid)
1584 {
1585 struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1586 NULL, NULL, NULL);
1587 if (lck == NULL) {
1588 DEBUG(0, ("could not get share mode lock\n"));
1589 return;
1590 }
1591 del_deferred_open_entry(lck, mid, pid);
1592 TALLOC_FREE(lck);
1593 }
1594
1595 /****************************************************************
1596 Ensure we get the brlock lock followed by the share mode lock
1597 in the correct order to prevent deadlocks if other smbd's are
1598 using the brlock database on this file simultaneously with this open
1599 (that code also gets the locks in brlock -> share mode lock order).
1600 ****************************************************************/
1601
1602 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1603 files_struct *fsp,
1604 const struct file_id id,
1605 const char *connectpath,
1606 const struct smb_filename *smb_fname,
1607 const struct timespec *p_old_write_time,
1608 struct share_mode_lock **p_lck,
1609 struct byte_range_lock **p_br_lck)
1610 {
1611 /* Ordering - we must get the br_lck for this
1612 file before the share mode. */
1613 if (lp_locking(fsp->conn->params)) {
1614 *p_br_lck = brl_get_locks_readonly(fsp);
1615 if (*p_br_lck == NULL) {
1616 DEBUG(0, ("Could not get br_lock\n"));
1617 return false;
1618 }
1619 /* Note - we don't need to free the returned
1620 br_lck explicitly as it was allocated on talloc_tos()
1621 and so will be autofreed (and release the lock)
1622 once the frame context disappears.
1623
1624 If it was set to fsp->brlock_rec then it was
1625 talloc_move'd to hang off the fsp pointer and
1626 in this case is guarenteed to not be holding the
1627 lock on the brlock database. */
1628 }
1629
1630 *p_lck = get_share_mode_lock(mem_ctx,
1631 id,
1632 connectpath,
1633 smb_fname,
1634 p_old_write_time);
1635
1636 if (*p_lck == NULL) {
1637 DEBUG(0, ("Could not get share mode lock\n"));
1638 TALLOC_FREE(*p_br_lck);
1639 return false;
1640 }
1641 return true;
1642 }
1643
1644 /****************************************************************************
1645 Open a file with a share mode. Passed in an already created files_struct *.
1646 ****************************************************************************/
1647
1648 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1649 struct smb_request *req,
1650 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1651 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1652 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1653 uint32 create_options, /* options such as delete on close. */
1654 uint32 new_dos_attributes, /* attributes used for new file. */
1655 int oplock_request, /* internal Samba oplock codes. */
1656 /* Information (FILE_EXISTS etc.) */
1657 uint32_t private_flags, /* Samba specific flags. */
1658 int *pinfo,
1659 files_struct *fsp)
1660 {
1661 struct smb_filename *smb_fname = fsp->fsp_name;
1662 int flags=0;
1663 int flags2=0;
1664 bool file_existed = VALID_STAT(smb_fname->st);
1665 bool def_acl = False;
1666 bool posix_open = False;
1667 bool new_file_created = False;
1668 bool clear_ads = false;
1669 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1670 mode_t new_unx_mode = (mode_t)0;
1671 mode_t unx_mode = (mode_t)0;
1672 int info;
1673 uint32 existing_dos_attributes = 0;
1674 struct timeval request_time = timeval_zero();
1675 struct share_mode_lock *lck = NULL;
1676 uint32 open_access_mask = access_mask;
1677 NTSTATUS status;
1678 char *parent_dir;
1679
1680 if (conn->printer) {
1681 /*
1682 * Printers are handled completely differently.
1683 * Most of the passed parameters are ignored.
1684 */
1685
1686 if (pinfo) {
1687 *pinfo = FILE_WAS_CREATED;
1688 }
1689
1690 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1691 smb_fname_str_dbg(smb_fname)));
1692
1693 if (!req) {
1694 DEBUG(0,("open_file_ntcreate: printer open without "
1695 "an SMB request!\n"));
1696 return NT_STATUS_INTERNAL_ERROR;
1697 }
1698
1699 return print_spool_open(fsp, smb_fname->base_name,
1700 req->vuid);
1701 }
1702
1703 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1704 NULL)) {
1705 return NT_STATUS_NO_MEMORY;
1706 }
1707
1708 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1709 posix_open = True;
1710 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1711 new_dos_attributes = 0;
1712 } else {
1713 /* Windows allows a new file to be created and
1714 silently removes a FILE_ATTRIBUTE_DIRECTORY
1715 sent by the client. Do the same. */
1716
1717 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1718
1719 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1720 * created new. */
1721 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1722 smb_fname, parent_dir);
1723 }
1724
1725 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1726 "access_mask=0x%x share_access=0x%x "
1727 "create_disposition = 0x%x create_options=0x%x "
1728 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1729 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1730 access_mask, share_access, create_disposition,
1731 create_options, (unsigned int)unx_mode, oplock_request,
1732 (unsigned int)private_flags));
1733
1734 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1735 DEBUG(0, ("No smb request but not an internal only open!\n"));
1736 return NT_STATUS_INTERNAL_ERROR;
1737 }
1738
1739 /*
1740 * Only non-internal opens can be deferred at all
1741 */
1742
1743 if (req) {
1744 void *ptr;
1745 if (get_deferred_open_message_state(req,
1746 &request_time,
1747 &ptr)) {
1748
1749 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1750 /* Remember the absolute time of the original
1751 request with this mid. We'll use it later to
1752 see if this has timed out. */
1753
1754 /* Remove the deferred open entry under lock. */
1755 remove_deferred_open_entry(
1756 state->id, req->mid,
1757 messaging_server_id(req->sconn->msg_ctx));
1758
1759 /* Ensure we don't reprocess this message. */
1760 remove_deferred_open_message_smb(req->sconn, req->mid);
1761 }
1762 }
1763
1764 if (!posix_open) {
1765 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1766 if (file_existed) {
1767 existing_dos_attributes = dos_mode(conn, smb_fname);
1768 }
1769 }
1770
1771 /* ignore any oplock requests if oplocks are disabled */
1772 if (!lp_oplocks(SNUM(conn)) ||
1773 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1774 /* Mask off everything except the private Samba bits. */
1775 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1776 }
1777
1778 /* this is for OS/2 long file names - say we don't support them */
1779 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1780 /* OS/2 Workplace shell fix may be main code stream in a later
1781 * release. */
1782 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1783 "supported.\n"));
1784 if (use_nt_status()) {
1785 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1786 }
1787 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1788 }
1789
1790 switch( create_disposition ) {
1791 /*
1792 * Currently we're using FILE_SUPERSEDE as the same as
1793 * FILE_OVERWRITE_IF but they really are
1794 * different. FILE_SUPERSEDE deletes an existing file
1795 * (requiring delete access) then recreates it.
1796 */
1797 case FILE_SUPERSEDE:
1798 /* If file exists replace/overwrite. If file doesn't
1799 * exist create. */
1800 flags2 |= (O_CREAT | O_TRUNC);
1801 clear_ads = true;
1802 break;
1803
1804 case FILE_OVERWRITE_IF:
1805 /* If file exists replace/overwrite. If file doesn't
1806 * exist create. */
1807 flags2 |= (O_CREAT | O_TRUNC);
1808 clear_ads = true;
1809 break;
1810
1811 case FILE_OPEN:
1812 /* If file exists open. If file doesn't exist error. */
1813 if (!file_existed) {
1814 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1815 "requested for file %s and file "
1816 "doesn't exist.\n",
1817 smb_fname_str_dbg(smb_fname)));
1818 errno = ENOENT;
1819 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1820 }
1821 break;
1822
1823 case FILE_OVERWRITE:
1824 /* If file exists overwrite. If file doesn't exist
1825 * error. */
1826 if (!file_existed) {
1827 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1828 "requested for file %s and file "
1829 "doesn't exist.\n",
1830 smb_fname_str_dbg(smb_fname) ));
1831 errno = ENOENT;
1832 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1833 }
1834 flags2 |= O_TRUNC;
1835 clear_ads = true;
1836 break;
1837
1838 case FILE_CREATE:
1839 /* If file exists error. If file doesn't exist
1840 * create. */
1841 if (file_existed) {
1842 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1843 "requested for file %s and file "
1844 "already exists.\n",
1845 smb_fname_str_dbg(smb_fname)));
1846 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1847 errno = EISDIR;
1848 } else {
1849 errno = EEXIST;
1850 }
1851 return map_nt_error_from_unix(errno);
1852 }
1853 flags2 |= (O_CREAT|O_EXCL);
1854 break;
1855
1856 case FILE_OPEN_IF:
1857 /* If file exists open. If file doesn't exist
1858 * create. */
1859 flags2 |= O_CREAT;
1860 break;
1861
1862 default:
1863 return NT_STATUS_INVALID_PARAMETER;
1864 }
1865
1866 /* We only care about matching attributes on file exists and
1867 * overwrite. */
1868
1869 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1870 (create_disposition == FILE_OVERWRITE_IF))) {
1871 if (!open_match_attributes(conn, existing_dos_attributes,
1872 new_dos_attributes,
1873 smb_fname->st.st_ex_mode,
1874 unx_mode, &new_unx_mode)) {
1875 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1876 "for file %s (%x %x) (0%o, 0%o)\n",
1877 smb_fname_str_dbg(smb_fname),
1878 existing_dos_attributes,
1879 new_dos_attributes,
1880 (unsigned int)smb_fname->st.st_ex_mode,
1881 (unsigned int)unx_mode ));
1882 errno = EACCES;
1883 return NT_STATUS_ACCESS_DENIED;
1884 }
1885 }
1886
1887 status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1888 access_mask,
1889 &access_mask);
1890 if (!NT_STATUS_IS_OK(status)) {
1891 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1892 "on file %s returned %s\n",
1893 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1894 return status;
1895 }
1896
1897 open_access_mask = access_mask;
1898
1899 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1900 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1901 }
1902
1903 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1904 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1905 access_mask));
1906
1907 /*
1908 * Note that we ignore the append flag as append does not
1909 * mean the same thing under DOS and Unix.
1910 */
1911
1912 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1913 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1914 /* DENY_DOS opens are always underlying read-write on the
1915 file handle, no matter what the requested access mask
1916 says. */
1917 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1918 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1919 flags = O_RDWR;
1920 } else {
1921 flags = O_WRONLY;
1922 }
1923 } else {
1924 flags = O_RDONLY;
1925 }
1926
1927 /*
1928 * Currently we only look at FILE_WRITE_THROUGH for create options.
1929 */
1930
1931 #if defined(O_SYNC)
1932 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1933 flags2 |= O_SYNC;
1934 }
1935 #endif /* O_SYNC */
1936
1937 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1938 flags2 |= O_APPEND;
1939 }
1940
1941 if (!posix_open && !CAN_WRITE(conn)) {
1942 /*
1943 * We should really return a permission denied error if either
1944 * O_CREAT or O_TRUNC are set, but for compatibility with
1945 * older versions of Samba we just AND them out.
1946 */
1947 flags2 &= ~(O_CREAT|O_TRUNC);
1948 }
1949
1950 /*
1951 * Ensure we can't write on a read-only share or file.
1952 */
1953
1954 if (flags != O_RDONLY && file_existed &&
1955 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1956 DEBUG(5,("open_file_ntcreate: write access requested for "
1957 "file %s on read only %s\n",
1958 smb_fname_str_dbg(smb_fname),
1959 !CAN_WRITE(conn) ? "share" : "file" ));
1960 errno = EACCES;
1961 return NT_STATUS_ACCESS_DENIED;
1962 }
1963
1964 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1965 fsp->share_access = share_access;
1966 fsp->fh->private_options = private_flags;
1967 fsp->access_mask = open_access_mask; /* We change this to the
1968 * requested access_mask after
1969 * the open is done. */
1970 fsp->posix_open = posix_open;
1971
1972 /* Ensure no SAMBA_PRIVATE bits can be set. */
1973 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1974
1975 if (timeval_is_zero(&request_time)) {
1976 request_time = fsp->open_time;
1977 }
1978
1979 if (file_existed) {
1980 struct byte_range_lock *br_lck = NULL;
1981 struct share_mode_entry *batch_entry = NULL;
1982 struct share_mode_entry *exclusive_entry = NULL;
1983 bool got_level2_oplock = false;
1984 bool got_a_none_oplock = false;
1985 struct file_id id;
1986
1987 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1988 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1989
1990 if (!acquire_ordered_locks(talloc_tos(),
1991 fsp,
1992 id,
1993 conn->connectpath,
1994 smb_fname,
1995 &old_write_time,
1996 &lck,
1997 &br_lck)) {
1998 return NT_STATUS_SHARING_VIOLATION;
1999 }
2000
2001 /* Get the types we need to examine. */
2002 find_oplock_types(fsp,
2003 oplock_request,
2004 lck,
2005 &batch_entry,
2006 &exclusive_entry,
2007 &got_level2_oplock,
2008 &got_a_none_oplock);
2009
2010 /* First pass - send break only on batch oplocks. */
2011 if ((req != NULL) &&
2012 delay_for_batch_oplocks(fsp,
2013 req->mid,
2014 oplock_request,
2015 batch_entry)) {
2016 schedule_defer_open(lck, request_time, req);
2017 TALLOC_FREE(lck);
2018 return NT_STATUS_SHARING_VIOLATION;
2019 }
2020
2021 /* Use the client requested access mask here, not the one we
2022 * open with. */
2023 status = open_mode_check(conn, lck, fsp->name_hash,
2024 access_mask, share_access,
2025 create_options, &file_existed);
2026
2027 if (NT_STATUS_IS_OK(status)) {
2028 /* We might be going to allow this open. Check oplock
2029 * status again. */
2030 /* Second pass - send break for both batch or
2031 * exclusive oplocks. */
2032 if ((req != NULL) &&
2033 delay_for_exclusive_oplocks(
2034 fsp,
2035 req->mid,
2036 oplock_request,
2037 exclusive_entry)) {
2038 schedule_defer_open(lck, request_time, req);
2039 TALLOC_FREE(lck);
2040 return NT_STATUS_SHARING_VIOLATION;
2041 }
2042 }
2043
2044 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2045 /* DELETE_PENDING is not deferred for a second */
2046 TALLOC_FREE(lck);
2047 return status;
2048 }
2049
2050 grant_fsp_oplock_type(fsp,
2051 br_lck,
2052 oplock_request,
2053 got_level2_oplock,
2054 got_a_none_oplock);
2055
2056 if (!NT_STATUS_IS_OK(status)) {
2057 uint32 can_access_mask;
2058 bool can_access = True;
2059
2060 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2061
2062 /* Check if this can be done with the deny_dos and fcb
2063 * calls. */
2064 if (private_flags &
2065 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2066 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2067 if (req == NULL) {
2068 DEBUG(0, ("DOS open without an SMB "
2069 "request!\n"));
2070 TALLOC_FREE(lck);
2071 return NT_STATUS_INTERNAL_ERROR;
2072 }
2073
2074 /* Use the client requested access mask here,
2075 * not the one we open with. */
2076 status = fcb_or_dos_open(req,
2077 conn,
2078 fsp,
2079 smb_fname,
2080 id,
2081 req->smbpid,
2082 req->vuid,
2083 access_mask,
2084 share_access,
2085 create_options);
2086
2087 if (NT_STATUS_IS_OK(status)) {
2088 TALLOC_FREE(lck);
2089 if (pinfo) {
2090 *pinfo = FILE_WAS_OPENED;
2091 }
2092 return NT_STATUS_OK;
2093 }
2094 }
2095
2096 /*
2097 * This next line is a subtlety we need for
2098 * MS-Access. If a file open will fail due to share
2099 * permissions and also for security (access) reasons,
2100 * we need to return the access failed error, not the
2101 * share error. We can't open the file due to kernel
2102 * oplock deadlock (it's possible we failed above on
2103 * the open_mode_check()) so use a userspace check.
2104 */
2105
2106 if (flags & O_RDWR) {
2107 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2108 } else if (flags & O_WRONLY) {
2109 can_access_mask = FILE_WRITE_DATA;
2110 } else {
2111 can_access_mask = FILE_READ_DATA;
2112 }
2113
2114 if (((can_access_mask & FILE_WRITE_DATA) &&
2115 !CAN_WRITE(conn)) ||
2116 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2117 smb_fname, can_access_mask))) {
2118 can_access = False;
2119 }
2120
2121 /*
2122 * If we're returning a share violation, ensure we
2123 * cope with the braindead 1 second delay.
2124 */
2125
2126 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2127 lp_defer_sharing_violations()) {
2128 struct timeval timeout;
2129 struct deferred_open_record state;
2130 int timeout_usecs;
2131
2132 /* this is a hack to speed up torture tests
2133 in 'make test' */
2134 timeout_usecs = lp_parm_int(SNUM(conn),
2135 "smbd","sharedelay",
2136 SHARING_VIOLATION_USEC_WAIT);
2137
2138 /* This is a relative time, added to the absolute
2139 request_time value to get the absolute timeout time.
2140 Note that if this is the second or greater time we enter
2141 this codepath for this particular request mid then
2142 request_time is left as the absolute time of the *first*
2143 time this request mid was processed. This is what allows
2144 the request to eventually time out. */
2145
2146 timeout = timeval_set(0, timeout_usecs);
2147
2148 /* Nothing actually uses state.delayed_for_oplocks
2149 but it's handy to differentiate in debug messages
2150 between a 30 second delay due to oplock break, and
2151 a 1 second delay for share mode conflicts. */
2152
2153 state.delayed_for_oplocks = False;
2154 state.id = id;
2155
2156 if ((req != NULL)
2157 && !request_timed_out(request_time,
2158 timeout)) {
2159 defer_open(lck, request_time, timeout,
2160 req, &state);
2161 }
2162 }
2163
2164 TALLOC_FREE(lck);
2165 if (can_access) {
2166 /*
2167 * We have detected a sharing violation here
2168 * so return the correct error code
2169 */
2170 status = NT_STATUS_SHARING_VIOLATION;
2171 } else {
2172 status = NT_STATUS_ACCESS_DENIED;
2173 }
2174 return status;
2175 }
2176
2177 /*
2178 * We exit this block with the share entry *locked*.....
2179 */
2180 }
2181
2182 SMB_ASSERT(!file_existed || (lck != NULL));
2183
2184 /*
2185 * Ensure we pay attention to default ACLs on directories if required.
2186 */
2187
2188 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2189 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2190 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2191 }
2192
2193 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2194 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2195 (unsigned int)flags, (unsigned int)flags2,
2196 (unsigned int)unx_mode, (unsigned int)access_mask,
2197 (unsigned int)open_access_mask));
2198
2199 /*
2200 * open_file strips any O_TRUNC flags itself.
2201 */
2202
2203 fsp_open = open_file(fsp, conn, req, parent_dir,
2204 flags|flags2, unx_mode, access_mask,
2205 open_access_mask);
2206
2207 if (!NT_STATUS_IS_OK(fsp_open)) {
2208 TALLOC_FREE(lck);
2209 return fsp_open;
2210 }
2211
2212 if (!file_existed) {
2213 struct byte_range_lock *br_lck = NULL;
2214 struct share_mode_entry *batch_entry = NULL;
2215 struct share_mode_entry *exclusive_entry = NULL;
2216 bool got_level2_oplock = false;
2217 bool got_a_none_oplock = false;
2218 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2219 struct file_id id;
2220 /*
2221 * Deal with the race condition where two smbd's detect the
2222 * file doesn't exist and do the create at the same time. One
2223 * of them will win and set a share mode, the other (ie. this
2224 * one) should check if the requested share mode for this
2225 * create is allowed.
2226 */
2227
2228 /*
2229 * Now the file exists and fsp is successfully opened,
2230 * fsp->dev and fsp->inode are valid and should replace the
2231 * dev=0,inode=0 from a non existent file. Spotted by
2232 * Nadav Danieli <nadavd@exanet.com>. JRA.
2233 */
2234
2235 id = fsp->file_id;
2236
2237 if (!acquire_ordered_locks(talloc_tos(),
2238 fsp,
2239 id,
2240 conn->connectpath,
2241 smb_fname,
2242 &old_write_time,
2243 &lck,
2244 &br_lck)) {
2245 return NT_STATUS_SHARING_VIOLATION;
2246 }
2247
2248 /* Get the types we need to examine. */
2249 find_oplock_types(fsp,
2250 oplock_request,
2251 lck,
2252 &batch_entry,
2253 &exclusive_entry,
2254 &got_level2_oplock,
2255 &got_a_none_oplock);
2256
2257 /* First pass - send break only on batch oplocks. */
2258 if ((req != NULL) &&
2259 delay_for_batch_oplocks(fsp,
2260 req->mid,
2261 oplock_request,
2262 batch_entry)) {
2263 schedule_defer_open(lck, request_time, req);
2264 TALLOC_FREE(lck);
2265 fd_close(fsp);
2266 return NT_STATUS_SHARING_VIOLATION;
2267 }
2268
2269 status = open_mode_check(conn, lck, fsp->name_hash,
2270 access_mask, share_access,
2271 create_options, &file_existed);
2272
2273 if (NT_STATUS_IS_OK(status)) {
2274 /* We might be going to allow this open. Check oplock
2275 * status again. */
2276 /* Second pass - send break for both batch or
2277 * exclusive oplocks. */
2278 if ((req != NULL) &&
2279 delay_for_exclusive_oplocks(
2280 fsp,
2281 req->mid,
2282 oplock_request,
2283 exclusive_entry)) {
2284 schedule_defer_open(lck, request_time, req);
2285 TALLOC_FREE(lck);
2286 fd_close(fsp);
2287 return NT_STATUS_SHARING_VIOLATION;
2288 }
2289 }
2290
2291 if (!NT_STATUS_IS_OK(status)) {
2292 struct deferred_open_record state;
2293
2294 state.delayed_for_oplocks = False;
2295 state.id = id;
2296
2297 /* Do it all over again immediately. In the second
2298 * round we will find that the file existed and handle
2299 * the DELETE_PENDING and FCB cases correctly. No need
2300 * to duplicate the code here. Essentially this is a
2301 * "goto top of this function", but don't tell
2302 * anybody... */
2303
2304 if (req != NULL) {
2305 defer_open(lck, request_time, timeval_zero(),
2306 req, &state);
2307 }
2308 TALLOC_FREE(lck);
2309 fd_close(fsp);
2310 return status;
2311 }
2312
2313 grant_fsp_oplock_type(fsp,
2314 br_lck,
2315 oplock_request,
2316 got_level2_oplock,
2317 got_a_none_oplock);
2318
2319 /*
2320 * We exit this block with the share entry *locked*.....
2321 */
2322
2323 }
2324
2325 SMB_ASSERT(lck != NULL);
2326
2327 /* Delete streams if create_disposition requires it */
2328 if (file_existed && clear_ads &&
2329 !is_ntfs_stream_smb_fname(smb_fname)) {
2330 status = delete_all_streams(conn, smb_fname->base_name);
2331 if (!NT_STATUS_IS_OK(status)) {
2332 TALLOC_FREE(lck);
2333 fd_close(fsp);
2334 return status;
2335 }
2336 }
2337
2338 /* note that we ignore failure for the following. It is
2339 basically a hack for NFS, and NFS will never set one of
2340 these only read them. Nobody but Samba can ever set a deny
2341 mode and we have already checked our more authoritative
2342 locking database for permission to set this deny mode. If
2343 the kernel refuses the operations then the kernel is wrong.
2344 note that GPFS supports it as well - jmcd */
2345
2346 if (fsp->fh->fd != -1) {
2347 int ret_flock;
2348 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2349 if(ret_flock == -1 ){
2350
2351 TALLOC_FREE(lck);
2352 fd_close(fsp);
2353
2354 return NT_STATUS_SHARING_VIOLATION;
2355 }
2356 }
2357
2358 /*
2359 * At this point onwards, we can guarentee that the share entry
2360 * is locked, whether we created the file or not, and that the
2361 * deny mode is compatible with all current opens.
2362 */
2363
2364 /*
2365 * If requested, truncate the file.
2366 */
2367
2368 if (file_existed && (flags2&O_TRUNC)) {
2369 /*
2370 * We are modifing the file after open - update the stat
2371 * struct..
2372 */
2373 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2374 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2375 status = map_nt_error_from_unix(errno);
2376 TALLOC_FREE(lck);
2377 fd_close(fsp);
2378 return status;
2379 }
2380 }
2381
2382 /*
2383 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2384 * but we don't have to store this - just ignore it on access check.
2385 */
2386 if (conn->sconn->using_smb2) {
2387 /*
2388 * SMB2 doesn't return it (according to Microsoft tests).
2389 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2390 * File created with access = 0x7 (Read, Write, Delete)
2391 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2392 */
2393 fsp->access_mask = access_mask;
2394 } else {
2395 /* But SMB1 does. */
2396 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2397 }
2398
2399 if (file_existed) {
2400 /* stat opens on existing files don't get oplocks. */
2401 if (is_stat_open(open_access_mask)) {
2402 fsp->oplock_type = NO_OPLOCK;
2403 }
2404
2405 if (flags2 & O_TRUNC) {
2406 info = FILE_WAS_OVERWRITTEN;
2407 } else {
2408 info = FILE_WAS_OPENED;
2409 }
2410 } else {
2411 info = FILE_WAS_CREATED;
2412 }
2413
2414 if (pinfo) {
2415 *pinfo = info;
2416 }
2417
2418 /*
2419 * Setup the oplock info in both the shared memory and
2420 * file structs.
2421 */
2422
2423 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2424 /*
2425 * Could not get the kernel oplock or there are byte-range
2426 * locks on the file.
2427 */
2428 fsp->oplock_type = NO_OPLOCK;
2429 }
2430
2431 set_share_mode(lck, fsp, get_current_uid(conn),
2432 req ? req->mid : 0,
2433 fsp->oplock_type);
2434
2435 /* Handle strange delete on close create semantics. */
2436 if (create_options & FILE_DELETE_ON_CLOSE) {
2437
2438 status = can_set_delete_on_close(fsp, new_dos_attributes);
2439
2440 if (!NT_STATUS_IS_OK(status)) {
2441 /* Remember to delete the mode we just added. */
2442 del_share_mode(lck, fsp);
2443 TALLOC_FREE(lck);
2444 fd_close(fsp);
2445 return status;
2446 }
2447 /* Note that here we set the *inital* delete on close flag,
2448 not the regular one. The magic gets handled in close. */
2449 fsp->initial_delete_on_close = True;
2450 }
2451
2452 if (info == FILE_WAS_OVERWRITTEN
2453 || info == FILE_WAS_CREATED
2454 || info == FILE_WAS_SUPERSEDED) {
2455 new_file_created = True;
2456 }
2457
2458 if (new_file_created) {
2459 /* Files should be initially set as archive */
2460 if (lp_map_archive(SNUM(conn)) ||
2461 lp_store_dos_attributes(SNUM(conn))) {
2462 if (!posix_open) {
2463 if (file_set_dosmode(conn, smb_fname,
2464 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2465 parent_dir, true) == 0) {
2466 unx_mode = smb_fname->st.st_ex_mode;
2467 }
2468 }
2469 }
2470 }
2471
2472 /* Determine sparse flag. */
2473 if (posix_open) {
2474 /* POSIX opens are sparse by default. */
2475 fsp->is_sparse = true;
2476 } else {
2477 fsp->is_sparse = (file_existed &&
2478 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2479 }
2480
2481 /*
2482 * Take care of inherited ACLs on created files - if default ACL not
2483 * selected.
2484 */
2485
2486 if (!posix_open && !file_existed && !def_acl) {
2487
2488 int saved_errno = errno; /* We might get ENOSYS in the next
2489 * call.. */
2490
2491 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2492 errno == ENOSYS) {
2493 errno = saved_errno; /* Ignore ENOSYS */
2494 }
2495
2496 } else if (new_unx_mode) {
2497
2498 int ret = -1;
2499
2500 /* Attributes need changing. File already existed. */
2501
2502 {
2503 int saved_errno = errno; /* We might get ENOSYS in the
2504 * next call.. */
2505 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2506
2507 if (ret == -1 && errno == ENOSYS) {
2508 errno = saved_errno; /* Ignore ENOSYS */
2509 } else {
2510 DEBUG(5, ("open_file_ntcreate: reset "
2511 "attributes of file %s to 0%o\n",
2512 smb_fname_str_dbg(smb_fname),
2513 (unsigned int)new_unx_mode));
2514 ret = 0; /* Don't do the fchmod below. */
2515 }
2516 }
2517
2518 if ((ret == -1) &&
2519 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2520 DEBUG(5, ("open_file_ntcreate: failed to reset "
2521 "attributes of file %s to 0%o\n",
2522 smb_fname_str_dbg(smb_fname),
2523 (unsigned int)new_unx_mode));
2524 }
2525
2526 /* If this is a successful open, we must remove any deferred open
2527 * records. */
2528 if (req != NULL) {
2529 del_deferred_open_entry(lck, req->mid,
2530 messaging_server_id(req->sconn->msg_ctx));
2531 }
2532 TALLOC_FREE(lck);
2533
2534 return NT_STATUS_OK;
2535 }
2536
2537
2538 /****************************************************************************
2539 Open a file for for write to ensure that we can fchmod it.
2540 ****************************************************************************/
2541
2542 NTSTATUS open_file_fchmod(connection_struct *conn,
2543 struct smb_filename *smb_fname,
2544 files_struct **result)
2545 {
2546 if (!VALID_STAT(smb_fname->st)) {
2547 return NT_STATUS_INVALID_PARAMETER;
2548 }
2549
2550 return SMB_VFS_CREATE_FILE(
2551 conn, /* conn */
2552 NULL, /* req */
2553 0, /* root_dir_fid */
2554 smb_fname, /* fname */
2555 FILE_WRITE_DATA, /* access_mask */
2556 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2557 FILE_SHARE_DELETE),
2558 FILE_OPEN, /* create_disposition*/
2559 0, /* create_options */
2560 0, /* file_attributes */
2561 INTERNAL_OPEN_ONLY, /* oplock_request */
2562 0, /* allocation_size */
2563 0, /* private_flags */
2564 NULL, /* sd */
2565 NULL, /* ea_list */
2566 result, /* result */
2567 NULL); /* pinfo */
2568 }
2569
2570 static NTSTATUS mkdir_internal(connection_struct *conn,
2571 struct smb_filename *smb_dname,
2572 uint32 file_attributes)
2573 {
2574 mode_t mode;
2575 char *parent_dir = NULL;
2576 NTSTATUS status;
2577 bool posix_open = false;
2578 bool need_re_stat = false;
2579 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2580
2581 if(access_mask & ~(conn->share_access)) {
2582 DEBUG(5,("mkdir_internal: failing share access "
2583 "%s\n", lp_servicename(SNUM(conn))));
2584 return NT_STATUS_ACCESS_DENIED;
2585 }
2586
2587 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2588 NULL)) {
2589 return NT_STATUS_NO_MEMORY;
2590 }
2591
2592 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2593 posix_open = true;
2594 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2595 } else {
2596 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2597 }
2598
2599 status = check_parent_access(conn,
2600 smb_dname,
2601 access_mask,
2602 &parent_dir);
2603 if(!NT_STATUS_IS_OK(status)) {
2604 DEBUG(5,("mkdir_internal: check_parent_access "
2605 "on directory %s for path %s returned %s\n",
2606 parent_dir,
2607 smb_dname->base_name,
2608 nt_errstr(status) ));
2609 return status;
2610 }
2611
2612 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2613 return map_nt_error_from_unix(errno);
2614 }
2615
2616 /* Ensure we're checking for a symlink here.... */
2617 /* We don't want to get caught by a symlink racer. */
2618
2619 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2620 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2621 smb_fname_str_dbg(smb_dname), strerror(errno)));
2622 return map_nt_error_from_unix(errno);
2623 }
2624
2625 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2626 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2627 smb_fname_str_dbg(smb_dname)));
2628 return NT_STATUS_NOT_A_DIRECTORY;
2629 }
2630
2631 if (lp_store_dos_attributes(SNUM(conn))) {
2632 if (!posix_open) {
2633 file_set_dosmode(conn, smb_dname,
2634 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2635 parent_dir, true);
2636 }
2637 }
2638
2639 if (lp_inherit_perms(SNUM(conn))) {
2640 inherit_access_posix_acl(conn, parent_dir,
2641 smb_dname->base_name, mode);
2642 need_re_stat = true;
2643 }
2644
2645 if (!posix_open) {
2646 /*
2647 * Check if high bits should have been set,
2648 * then (if bits are missing): add them.
2649 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2650 * dir.
2651 */
2652 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2653 (mode & ~smb_dname->st.st_ex_mode)) {
2654 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2655 (smb_dname->st.st_ex_mode |
2656 (mode & ~smb_dname->st.st_ex_mode)));
2657 need_re_stat = true;
2658 }
2659 }
2660
2661 /* Change the owner if required. */
2662 if (lp_inherit_owner(SNUM(conn))) {
2663 change_dir_owner_to_parent(conn, parent_dir,
2664 smb_dname->base_name,
2665 &smb_dname->st);
2666 need_re_stat = true;
2667 }
2668
2669 if (need_re_stat) {
2670 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2671 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2672 smb_fname_str_dbg(smb_dname), strerror(errno)));
2673 return map_nt_error_from_unix(errno);
2674 }
2675 }
2676
2677 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2678 smb_dname->base_name);
2679
2680 return NT_STATUS_OK;
2681 }
2682
2683 /****************************************************************************
2684 Ensure we didn't get symlink raced on opening a directory.
2685 ****************************************************************************/
2686
2687 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2688 const SMB_STRUCT_STAT *sbuf2)
2689 {
2690 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2691 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2692 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2693 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2694 return false;
2695 }
2696 return true;
2697 }
2698
2699 /****************************************************************************
2700 Open a directory from an NT SMB call.
2701 ****************************************************************************/
2702
2703 static NTSTATUS open_directory(connection_struct *conn,
2704 struct smb_request *req,
2705 struct smb_filename *smb_dname,
2706 uint32 access_mask,
2707 uint32 share_access,
2708 uint32 create_disposition,
2709 uint32 create_options,
2710 uint32 file_attributes,
2711 int *pinfo,
2712 files_struct **result)
2713 {
2714 files_struct *fsp = NULL;
2715 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2716 struct share_mode_lock *lck = NULL;
2717 NTSTATUS status;
2718 struct timespec mtimespec;
2719 int info = 0;
2720
2721 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2722
2723 /* Ensure we have a directory attribute. */
2724 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2725
2726 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2727 "share_access = 0x%x create_options = 0x%x, "
2728 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2729 smb_fname_str_dbg(smb_dname),
2730 (unsigned int)access_mask,
2731 (unsigned int)share_access,
2732 (unsigned int)create_options,
2733 (unsigned int)create_disposition,
2734 (unsigned int)file_attributes));
2735
2736 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2737 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2738 is_ntfs_stream_smb_fname(smb_dname)) {
2739 DEBUG(2, ("open_directory: %s is a stream name!\n",
2740 smb_fname_str_dbg(smb_dname)));
2741 return NT_STATUS_NOT_A_DIRECTORY;
2742 }
2743
2744 status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2745 access_mask, &access_mask);
2746 if (!NT_STATUS_IS_OK(status)) {
2747 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2748 "on file %s returned %s\n",
2749 smb_fname_str_dbg(smb_dname),
2750 nt_errstr(status)));
2751 return status;
2752 }
2753
2754 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2755 !security_token_has_privilege(get_current_nttok(conn),
2756 SEC_PRIV_SECURITY)) {
2757 DEBUG(10, ("open_directory: open on %s "
2758 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2759 smb_fname_str_dbg(smb_dname)));
2760 return NT_STATUS_PRIVILEGE_NOT_HELD;
2761 }
2762
2763 switch( create_disposition ) {
2764 case FILE_OPEN:
2765
2766 if (!dir_existed) {
2767 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2768 }
2769
2770 info = FILE_WAS_OPENED;
2771 break;
2772
2773 case FILE_CREATE:
2774
2775 /* If directory exists error. If directory doesn't
2776 * exist create. */
2777
2778 if (dir_existed) {
2779 status = NT_STATUS_OBJECT_NAME_COLLISION;
2780 DEBUG(2, ("open_directory: unable to create "
2781 "%s. Error was %s\n",
2782 smb_fname_str_dbg(smb_dname),
2783 nt_errstr(status)));
2784 return status;
2785 }
2786
2787 status = mkdir_internal(conn, smb_dname,
2788 file_attributes);
2789
2790 if (!NT_STATUS_IS_OK(status)) {
2791 DEBUG(2, ("open_directory: unable to create "
2792 "%s. Error was %s\n",
2793 smb_fname_str_dbg(smb_dname),
2794 nt_errstr(status)));
2795 return status;
2796 }
2797
2798 info = FILE_WAS_CREATED;
2799 break;
2800
2801 case FILE_OPEN_IF:
2802 /*
2803 * If directory exists open. If directory doesn't
2804 * exist create.
2805 */
2806
2807 if (dir_existed) {
2808 status = NT_STATUS_OK;
2809 info = FILE_WAS_OPENED;
2810 } else {
2811 status = mkdir_internal(conn, smb_dname,
2812 file_attributes);
2813
2814 if (NT_STATUS_IS_OK(status)) {
2815 info = FILE_WAS_CREATED;
2816 } else {
2817 /* Cope with create race. */
2818 if (!NT_STATUS_EQUAL(status,
2819 NT_STATUS_OBJECT_NAME_COLLISION)) {
2820 DEBUG(2, ("open_directory: unable to create "
2821 "%s. Error was %s\n",
2822 smb_fname_str_dbg(smb_dname),
2823 nt_errstr(status)));
2824 return status;
2825 }
2826 info = FILE_WAS_OPENED;
2827 }
2828 }
2829
2830 break;
2831
2832 case FILE_SUPERSEDE:
2833 case FILE_OVERWRITE:
2834 case FILE_OVERWRITE_IF:
2835 default:
2836 DEBUG(5,("open_directory: invalid create_disposition "
2837 "0x%x for directory %s\n",
2838 (unsigned int)create_disposition,
2839 smb_fname_str_dbg(smb_dname)));
2840 return NT_STATUS_INVALID_PARAMETER;
2841 }
2842
2843 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2844 DEBUG(5,("open_directory: %s is not a directory !\n",
2845 smb_fname_str_dbg(smb_dname)));
2846 return NT_STATUS_NOT_A_DIRECTORY;
2847 }
2848
2849 if (info == FILE_WAS_OPENED) {
2850 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2851 if (!NT_STATUS_IS_OK(status)) {
2852 DEBUG(10, ("open_directory: smbd_check_access_rights on "
2853 "file %s failed with %s\n",
2854 smb_fname_str_dbg(smb_dname),
2855 nt_errstr(status)));
2856 return status;
2857 }
2858 }
2859
2860 status = file_new(req, conn, &fsp);
2861 if(!NT_STATUS_IS_OK(status)) {
2862 return status;
2863 }
2864
2865 /*
2866 * Setup the files_struct for it.
2867 */
2868
2869 fsp->mode = smb_dname->st.st_ex_mode;
2870 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2871 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2872 fsp->file_pid = req ? req->smbpid : 0;
2873 fsp->can_lock = False;
2874 fsp->can_read = False;
2875 fsp->can_write = False;
2876
2877 fsp->share_access = share_access;
2878 fsp->fh->private_options = 0;
2879 /*
2880 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2881 */
2882 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2883 fsp->print_file = NULL;
2884 fsp->modified = False;
2885 fsp->oplock_type = NO_OPLOCK;
2886 fsp->sent_oplock_break = NO_BREAK_SENT;
2887 fsp->is_directory = True;
2888 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2889 status = fsp_set_smb_fname(fsp, smb_dname);
2890 if (!NT_STATUS_IS_OK(status)) {
2891 file_free(req, fsp);
2892 return status;
2893 }
2894
2895 mtimespec = smb_dname->st.st_ex_mtime;
2896
2897 #ifdef O_DIRECTORY
2898 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2899 #else
2900 /* POSIX allows us to open a directory with O_RDONLY. */
2901 status = fd_open(conn, fsp, O_RDONLY, 0);
2902 #endif
2903 if (!NT_STATUS_IS_OK(status)) {
2904 DEBUG(5, ("open_directory: Could not open fd for "
2905 "%s (%s)\n",
2906 smb_fname_str_dbg(smb_dname),
2907 nt_errstr(status)));
2908 file_free(req, fsp);
2909 return status;
2910 }
2911
2912 status = vfs_stat_fsp(fsp);
2913 if (!NT_STATUS_IS_OK(status)) {
2914 fd_close(fsp);
2915 file_free(req, fsp);
2916 return status;
2917 }
2918
2919 /* Ensure there was no race condition. */
2920 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2921 DEBUG(5,("open_directory: stat struct differs for "
2922 "directory %s.\n",
2923 smb_fname_str_dbg(smb_dname)));
2924 fd_close(fsp);
2925 file_free(req, fsp);
2926 return NT_STATUS_ACCESS_DENIED;
2927 }
2928
2929 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2930 conn->connectpath, smb_dname, &mtimespec);
2931
2932 if (lck == NULL) {
2933 DEBUG(0, ("open_directory: Could not get share mode lock for "
2934 "%s\n", smb_fname_str_dbg(smb_dname)));
2935 fd_close(fsp);
2936 file_free(req, fsp);
2937 return NT_STATUS_SHARING_VIOLATION;
2938 }
2939
2940 status = open_mode_check(conn, lck, fsp->name_hash,
2941 access_mask, share_access,
2942 create_options, &dir_existed);
2943
2944 if (!NT_STATUS_IS_OK(status)) {
2945 TALLOC_FREE(lck);
2946 fd_close(fsp);
2947 file_free(req, fsp);
2948 return status;
2949 }
2950
2951 set_share_mode(lck, fsp, get_current_uid(conn),
2952 req ? req->mid : 0, NO_OPLOCK);
2953
2954 /* For directories the delete on close bit at open time seems
2955 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2956 if (create_options & FILE_DELETE_ON_CLOSE) {
2957 status = can_set_delete_on_close(fsp, 0);
2958 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2959 TALLOC_FREE(lck);
2960 fd_close(fsp);
2961 file_free(req, fsp);
2962 return status;
2963 }
2964
2965 if (NT_STATUS_IS_OK(status)) {
2966 /* Note that here we set the *inital* delete on close flag,
2967 not the regular one. The magic gets handled in close. */
2968 fsp->initial_delete_on_close = True;
2969 }
2970 }
2971
2972 TALLOC_FREE(lck);
2973
2974 if (pinfo) {
2975 *pinfo = info;
2976 }
2977
2978 *result = fsp;
2979 return NT_STATUS_OK;
2980 }
2981
2982 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2983 struct smb_filename *smb_dname)
2984 {
2985 NTSTATUS status;
2986 files_struct *fsp;
2987
2988 status = SMB_VFS_CREATE_FILE(
2989 conn, /* conn */
2990 req, /* req */
2991 0, /* root_dir_fid */
2992 smb_dname, /* fname */
2993 FILE_READ_ATTRIBUTES, /* access_mask */
2994 FILE_SHARE_NONE, /* share_access */
2995 FILE_CREATE, /* create_disposition*/
2996 FILE_DIRECTORY_FILE, /* create_options */
2997 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2998 0, /* oplock_request */
2999 0, /* allocation_size */
3000 0, /* private_flags */
3001 NULL, /* sd */
3002 NULL, /* ea_list */
3003 &fsp, /* result */
3004 NULL); /* pinfo */
3005
3006 if (NT_STATUS_IS_OK(status)) {
3007 close_file(req, fsp, NORMAL_CLOSE);
3008 }
3009
3010 return status;
3011 }
3012
3013 /****************************************************************************
3014 Receive notification that one of our open files has been renamed by another
3015 smbd process.
3016 ****************************************************************************/
3017
3018 void msg_file_was_renamed(struct messaging_context *msg,
3019 void *private_data,
3020 uint32_t msg_type,
3021 struct server_id server_id,
3022 DATA_BLOB *data)
3023 {
3024 files_struct *fsp;
3025 char *frm = (char *)data->data;
3026 struct file_id id;
3027 const char *sharepath;
3028 const char *base_name;
3029 const char *stream_name;
3030 struct smb_filename *smb_fname = NULL;
3031 size_t sp_len, bn_len;
3032 NTSTATUS status;
3033 struct smbd_server_connection *sconn =
3034 talloc_get_type_abort(private_data,
3035 struct smbd_server_connection);
3036
3037 if (data->data == NULL
3038 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3039 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3040 (int)data->length));
3041 return;
3042 }
3043
3044 /* Unpack the message. */
3045 pull_file_id_24(frm, &id);
3046 sharepath = &frm[24];
3047 sp_len = strlen(sharepath);
3048 base_name = sharepath + sp_len + 1;
3049 bn_len = strlen(base_name);
3050 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3051
3052 /* stream_name must always be NULL if there is no stream. */
3053 if (stream_name[0] == '\0') {
3054 stream_name = NULL;
3055 }
3056
3057 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3058 stream_name, NULL, &smb_fname);
3059 if (!NT_STATUS_IS_OK(status)) {
3060 return;
3061 }
3062
3063 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3064 "file_id %s\n",
3065 sharepath, smb_fname_str_dbg(smb_fname),
3066 file_id_string_tos(&id)));
3067
3068 for(fsp = file_find_di_first(sconn, id); fsp;
3069 fsp = file_find_di_next(fsp)) {
3070 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3071
3072 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3073 fsp->fnum, fsp_str_dbg(fsp),
3074 smb_fname_str_dbg(smb_fname)));
3075 status = fsp_set_smb_fname(fsp, smb_fname);
3076 if (!NT_STATUS_IS_OK(status)) {
3077 goto out;
3078 }
3079 } else {
3080 /* TODO. JRA. */
3081 /* Now we have the complete path we can work out if this is
3082 actually within this share and adjust newname accordingly. */
3083 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3084 "not sharepath %s) "
3085 "fnum %d from %s -> %s\n",
3086 fsp->conn->connectpath,
3087 sharepath,
3088 fsp->fnum,
3089 fsp_str_dbg(fsp),
3090 smb_fname_str_dbg(smb_fname)));
3091 }
3092 }
3093 out:
3094 TALLOC_FREE(smb_fname);
3095 return;
3096 }
3097
3098 /*
3099 * If a main file is opened for delete, all streams need to be checked for
3100 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3101 * If that works, delete them all by setting the delete on close and close.
3102 */
3103
3104 NTSTATUS open_streams_for_delete(connection_struct *conn,
3105 const char *fname)
3106 {
3107 struct stream_struct *stream_info = NULL;
3108 files_struct **streams = NULL;
3109 int i;
3110 unsigned int num_streams = 0;
3111 TALLOC_CTX *frame = talloc_stackframe();
3112 NTSTATUS status;
3113
3114 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3115 &num_streams, &stream_info);
3116
3117 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3118 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3119 DEBUG(10, ("no streams around\n"));
3120 TALLOC_FREE(frame);
3121 return NT_STATUS_OK;
3122 }
3123
3124 if (!NT_STATUS_IS_OK(status)) {
3125 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3126 nt_errstr(status)));
3127 goto fail;
3128 }
3129
3130 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3131 num_streams));
3132
3133 if (num_streams == 0) {
3134 TALLOC_FREE(frame);
3135 return NT_STATUS_OK;
3136 }
3137
3138 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3139 if (streams == NULL) {
3140 DEBUG(0, ("talloc failed\n"));
3141 status = NT_STATUS_NO_MEMORY;
3142 goto fail;
3143 }
3144
3145 for (i=0; i<num_streams; i++) {
3146 struct smb_filename *smb_fname = NULL;
3147
3148 if (strequal(stream_info[i].name, "::$DATA")) {
3149 streams[i] = NULL;
3150 continue;
3151 }
3152
3153 status = create_synthetic_smb_fname(talloc_tos(), fname,
3154 stream_info[i].name,
3155 NULL, &smb_fname);
3156 if (!NT_STATUS_IS_OK(status)) {
3157 goto fail;
3158 }
3159
3160 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3161 DEBUG(10, ("Unable to stat stream: %s\n",
3162 smb_fname_str_dbg(smb_fname)));
3163 }
3164
3165 status = SMB_VFS_CREATE_FILE(
3166 conn, /* conn */
3167 NULL, /* req */
3168 0, /* root_dir_fid */
3169 smb_fname, /* fname */
3170 DELETE_ACCESS, /* access_mask */
3171 (FILE_SHARE_READ | /* share_access */
3172 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3173 FILE_OPEN, /* create_disposition*/
3174 0, /* create_options */
3175 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3176 0, /* oplock_request */
3177 0, /* allocation_size */
3178 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3179 NULL, /* sd */
3180 NULL, /* ea_list */
3181 &streams[i], /* result */
3182 NULL); /* pinfo */
3183
3184 if (!NT_STATUS_IS_OK(status)) {
3185 DEBUG(10, ("Could not open stream %s: %s\n",
3186 smb_fname_str_dbg(smb_fname),
3187 nt_errstr(status)));
3188
3189 TALLOC_FREE(smb_fname);
3190 break;
3191 }
3192 TALLOC_FREE(smb_fname);
3193 }
3194
3195 /*
3196 * don't touch the variable "status" beyond this point :-)
3197 */
3198
3199 for (i -= 1 ; i >= 0; i--) {
3200 if (streams[i] == NULL) {
3201 continue;
3202 }
3203
3204 DEBUG(10, ("Closing stream # %d, %s\n", i,
3205 fsp_str_dbg(streams[i])));
3206 close_file(NULL, streams[i], NORMAL_CLOSE);
3207 }
3208
3209 fail:
3210 TALLOC_FREE(frame);
3211 return status;
3212 }
3213
3214 /*********************************************************************
3215 Create a default ACL by inheriting from the parent. If no inheritance
3216 from the parent available, don't set anything. This will leave the actual
3217 permissions the new file or directory already got from the filesystem
3218 as the NT ACL when read.
3219 *********************************************************************/
3220
3221 static NTSTATUS inherit_new_acl(files_struct *fsp)
3222 {
3223 TALLOC_CTX *ctx = talloc_tos();
3224 char *parent_name = NULL;
3225 struct security_descriptor *parent_desc = NULL;
3226 NTSTATUS status = NT_STATUS_OK;
3227 struct security_descriptor *psd = NULL;
3228 struct dom_sid *owner_sid = NULL;
3229 struct dom_sid *group_sid = NULL;
3230 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3231 bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3232 bool inheritable_components = false;
3233 size_t size = 0;
3234
3235 if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3236 return NT_STATUS_NO_MEMORY;
3237 }
3238
3239 status = SMB_VFS_GET_NT_ACL(fsp->conn,
3240 parent_name,
3241 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3242 &parent_desc);
3243 if (!NT_STATUS_IS_OK(status)) {
3244 return status;
3245 }
3246
3247 inheritable_components = sd_has_inheritable_components(parent_desc,
3248 fsp->is_directory);
3249
3250 if (!inheritable_components && !inherit_owner) {
3251 /* Nothing to inherit and not setting owner. */
3252 return NT_STATUS_OK;
3253 }
3254
3255 /* Create an inherited descriptor from the parent. */
3256
3257 if (DEBUGLEVEL >= 10) {
3258 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3259 fsp_str_dbg(fsp) ));
3260 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3261 }
3262
3263 /* Inherit from parent descriptor if "inherit owner" set. */
3264 if (inherit_owner) {
3265 owner_sid = parent_desc->owner_sid;
3266 group_sid = parent_desc->group_sid;
3267 }
3268
3269 if (owner_sid == NULL) {
3270 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3271 }
3272 if (group_sid == NULL) {
3273 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3274 }
3275
3276 status = se_create_child_secdesc(ctx,
3277 &psd,
3278 &size,
3279 parent_desc,
3280 owner_sid,
3281 group_sid,
3282 fsp->is_directory);
3283 if (!NT_STATUS_IS_OK(status)) {
3284 return status;
3285 }
3286
3287 /* If inheritable_components == false,
3288 se_create_child_secdesc()
3289 creates a security desriptor with a NULL dacl
3290 entry, but with SEC_DESC_DACL_PRESENT. We need
3291 to remove that flag. */
3292
3293 if (!inheritable_components) {
3294 security_info_sent &= ~SECINFO_DACL;
3295 psd->type &= ~SEC_DESC_DACL_PRESENT;
3296 }
3297
3298 if (DEBUGLEVEL >= 10) {
3299 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3300 fsp_str_dbg(fsp) ));
3301 NDR_PRINT_DEBUG(security_descriptor, psd);
3302 }
3303
3304 if (inherit_owner) {
3305 /* We need to be root to force this. */
3306 become_root();
3307 }
3308 status = SMB_VFS_FSET_NT_ACL(fsp,
3309 security_info_sent,
3310 psd);
3311 if (inherit_owner) {
3312 unbecome_root();
3313 }
3314 return status;
3315 }
3316
3317 /*
3318 * Wrapper around open_file_ntcreate and open_directory
3319 */
3320
3321 static NTSTATUS create_file_unixpath(connection_struct *conn,
3322 struct smb_request *req,
3323 struct smb_filename *smb_fname,
3324 uint32_t access_mask,
3325 uint32_t share_access,
3326 uint32_t create_disposition,
3327 uint32_t create_options,
3328 uint32_t file_attributes,
3329 uint32_t oplock_request,
3330 uint64_t allocation_size,
3331 uint32_t private_flags,
3332 struct security_descriptor *sd,
3333 struct ea_list *ea_list,
3334
3335 files_struct **result,
3336 int *pinfo)
3337 {
3338 int info = FILE_WAS_OPENED;
3339 files_struct *base_fsp = NULL;
3340 files_struct *fsp = NULL;
3341 NTSTATUS status;
3342
3343 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3344 "file_attributes = 0x%x, share_access = 0x%x, "
3345 "create_disposition = 0x%x create_options = 0x%x "
3346 "oplock_request = 0x%x private_flags = 0x%x "
3347 "ea_list = 0x%p, sd = 0x%p, "
3348 "fname = %s\n",
3349 (unsigned int)access_mask,
3350 (unsigned int)file_attributes,
3351 (unsigned int)share_access,
3352 (unsigned int)create_disposition,
3353 (unsigned int)create_options,
3354 (unsigned int)oplock_request,
3355 (unsigned int)private_flags,
3356 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3357
3358 if (create_options & FILE_OPEN_BY_FILE_ID) {
3359 status = NT_STATUS_NOT_SUPPORTED;
3360 goto fail;
3361 }
3362
3363 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3364 status = NT_STATUS_INVALID_PARAMETER;
3365 goto fail;
3366 }
3367
3368 if (req == NULL) {
3369 oplock_request |= INTERNAL_OPEN_ONLY;
3370 }
3371
3372 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3373 && (access_mask & DELETE_ACCESS)
3374 && !is_ntfs_stream_smb_fname(smb_fname)) {
3375 /*
3376 * We can't open a file with DELETE access if any of the
3377 * streams is open without FILE_SHARE_DELETE
3378 */
3379 status = open_streams_for_delete(conn, smb_fname->base_name);
3380
3381 if (!NT_STATUS_IS_OK(status)) {
3382 goto fail;
3383 }
3384 }
3385
3386 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3387 !security_token_has_privilege(get_current_nttok(conn),
3388 SEC_PRIV_SECURITY)) {
3389 DEBUG(10, ("create_file_unixpath: open on %s "
3390 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3391 smb_fname_str_dbg(smb_fname)));
3392 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3393 goto fail;
3394 }
3395
3396 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3397 && is_ntfs_stream_smb_fname(smb_fname)
3398 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3399 uint32 base_create_disposition;
3400 struct smb_filename *smb_fname_base = NULL;
3401
3402 if (create_options & FILE_DIRECTORY_FILE) {
3403 status = NT_STATUS_NOT_A_DIRECTORY;
3404 goto fail;
3405 }
3406
3407 switch (create_disposition) {
3408 case FILE_OPEN:
3409 base_create_disposition = FILE_OPEN;
3410 break;
3411 default:
3412 base_create_disposition = FILE_OPEN_IF;
3413 break;
3414 }
3415
3416 /* Create an smb_filename with stream_name == NULL. */
3417 status = create_synthetic_smb_fname(talloc_tos(),
3418 smb_fname->base_name,
3419 NULL, NULL,
3420 &smb_fname_base);
3421 if (!NT_STATUS_IS_OK(status)) {
3422 goto fail;
3423 }
3424
3425 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3426 DEBUG(10, ("Unable to stat stream: %s\n",
3427 smb_fname_str_dbg(smb_fname_base)));
3428 }
3429
3430 /* Open the base file. */
3431 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3432 FILE_SHARE_READ
3433 | FILE_SHARE_WRITE
3434 | FILE_SHARE_DELETE,
3435 base_create_disposition,
3436 0, 0, 0, 0, 0, NULL, NULL,
3437 &base_fsp, NULL);
3438 TALLOC_FREE(smb_fname_base);
3439
3440 if (!NT_STATUS_IS_OK(status)) {
3441 DEBUG(10, ("create_file_unixpath for base %s failed: "
3442 "%s\n", smb_fname->base_name,
3443 nt_errstr(status)));
3444 goto fail;
3445 }
3446 /* we don't need to low level fd */
3447 fd_close(base_fsp);
3448 }
3449
3450 /*
3451 * If it's a request for a directory open, deal with it separately.
3452 */
3453
3454 if (create_options & FILE_DIRECTORY_FILE) {
3455
3456 if (create_options & FILE_NON_DIRECTORY_FILE) {
3457 status = NT_STATUS_INVALID_PARAMETER;
3458 goto fail;
3459 }
3460
3461 /* Can't open a temp directory. IFS kit test. */
3462 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3463 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3464 status = NT_STATUS_INVALID_PARAMETER;
3465 goto fail;
3466 }
3467
3468 /*
3469 * We will get a create directory here if the Win32
3470 * app specified a security descriptor in the
3471 * CreateDirectory() call.
3472 */
3473
3474 oplock_request = 0;
3475 status = open_directory(
3476 conn, req, smb_fname, access_mask, share_access,
3477 create_disposition, create_options, file_attributes,
3478 &info, &fsp);
3479 } else {
3480
3481 /*
3482 * Ordinary file case.
3483 */
3484
3485 status = file_new(req, conn, &fsp);
3486 if(!NT_STATUS_IS_OK(status)) {
3487 goto fail;
3488 }
3489
3490 status = fsp_set_smb_fname(fsp, smb_fname);
3491 if (!NT_STATUS_IS_OK(status)) {
3492 goto fail;
3493 }
3494
3495 /*
3496 * We're opening the stream element of a base_fsp
3497 * we already opened. Set up the base_fsp pointer.
3498 */
3499 if (base_fsp) {
3500 fsp->base_fsp = base_fsp;
3501 }
3502
3503 status = open_file_ntcreate(conn,
3504 req,
3505 access_mask,
3506 share_access,
3507 create_disposition,
3508 create_options,
3509 file_attributes,
3510 oplock_request,
3511 private_flags,
3512 &info,
3513 fsp);
3514
3515 if(!NT_STATUS_IS_OK(status)) {
3516 file_free(req, fsp);
3517 fsp = NULL;
3518 }
3519
3520 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3521
3522 /* A stream open never opens a directory */
3523
3524 if (base_fsp) {
3525 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3526 goto fail;
3527 }
3528
3529 /*
3530 * Fail the open if it was explicitly a non-directory
3531 * file.
3532 */
3533
3534 if (create_options & FILE_NON_DIRECTORY_FILE) {
3535 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3536 goto fail;
3537 }
3538
3539 oplock_request = 0;
3540 status = open_directory(
3541 conn, req, smb_fname, access_mask,
3542 share_access, create_disposition,
3543 create_options, file_attributes,
3544 &info, &fsp);
3545 }
3546 }
3547
3548 if (!NT_STATUS_IS_OK(status)) {
3549 goto fail;
3550 }
3551
3552 fsp->base_fsp = base_fsp;
3553
3554 if ((ea_list != NULL) &&
3555 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3556 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3557 if (!NT_STATUS_IS_OK(status)) {
3558 goto fail;
3559 }
3560 }
3561
3562 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3563 status = NT_STATUS_ACCESS_DENIED;
3564 goto fail;
3565 }
3566
3567 /* Save the requested allocation size. */
3568 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3569 if (allocation_size
3570 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3571 fsp->initial_allocation_size = smb_roundup(
3572 fsp->conn, allocation_size);
3573 if (fsp->is_directory) {
3574 /* Can't set allocation size on a directory. */
3575 status = NT_STATUS_ACCESS_DENIED;
3576 goto fail;
3577 }
3578 if (vfs_allocate_file_space(
3579 fsp, fsp->initial_allocation_size) == -1) {
3580 status = NT_STATUS_DISK_FULL;
3581 goto fail;
3582 }
3583 } else {
3584 fsp->initial_allocation_size = smb_roundup(
3585 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3586 }
3587 }
3588
3589 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3590 fsp->base_fsp == NULL) {
3591 if (sd != NULL) {
3592 /*
3593 * According to the MS documentation, the only time the security
3594 * descriptor is applied to the opened file is iff we *created* the
3595 * file; an existing file stays the same.
3596 *
3597 * Also, it seems (from observation) that you can open the file with
3598 * any access mask but you can still write the sd. We need to override
3599 * the granted access before we call set_sd
3600 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3601 */
3602
3603 uint32_t sec_info_sent;
3604 uint32_t saved_access_mask = fsp->access_mask;
3605
3606 sec_info_sent = get_sec_info(sd);
3607
3608 fsp->access_mask = FILE_GENERIC_ALL;
3609
3610 /* Convert all the generic bits. */
3611 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3612 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3613
3614 if (sec_info_sent & (SECINFO_OWNER|
3615 SECINFO_GROUP|
3616 SECINFO_DACL|
3617 SECINFO_SACL)) {
3618 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3619 }
3620
3621 fsp->access_mask = saved_access_mask;
3622
3623 if (!NT_STATUS_IS_OK(status)) {
3624 goto fail;
3625 }
3626 } else if (lp_inherit_acls(SNUM(conn))) {
3627 /* Inherit from parent. Errors here are not fatal. */
3628 status = inherit_new_acl(fsp);
3629 if (!NT_STATUS_IS_OK(status)) {
3630 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3631 fsp_str_dbg(fsp),
3632 nt_errstr(status) ));
3633 }
3634 }
3635 }
3636
3637 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3638
3639 *result = fsp;
3640 if (pinfo != NULL) {
3641 *pinfo = info;
3642 }
3643
3644 smb_fname->st = fsp->fsp_name->st;
3645
3646 return NT_STATUS_OK;
3647
3648 fail:
3649 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3650
3651 if (fsp != NULL) {
3652 if (base_fsp && fsp->base_fsp == base_fsp) {
3653 /*
3654 * The close_file below will close
3655 * fsp->base_fsp.
3656 */
3657 base_fsp = NULL;
3658 }
3659 close_file(req, fsp, ERROR_CLOSE);
3660 fsp = NULL;
3661 }
3662 if (base_fsp != NULL) {
3663 close_file(req, base_fsp, ERROR_CLOSE);
3664 base_fsp = NULL;
3665 }
3666 return status;
3667 }
3668
3669 /*
3670 * Calculate the full path name given a relative fid.
3671 */
3672 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3673 struct smb_request *req,
3674 uint16_t root_dir_fid,
3675 const struct smb_filename *smb_fname,
3676 struct smb_filename **smb_fname_out)
3677 {
3678 files_struct *dir_fsp;
3679 char *parent_fname = NULL;
3680 char *new_base_name = NULL;
3681 NTSTATUS status;
3682
3683 if (root_dir_fid == 0 || !smb_fname) {
3684 status = NT_STATUS_INTERNAL_ERROR;
3685 goto out;
3686 }
3687
3688 dir_fsp = file_fsp(req, root_dir_fid);
3689
3690 if (dir_fsp == NULL) {
3691 status = NT_STATUS_INVALID_HANDLE;
3692 goto out;
3693 }
3694
3695 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3696 status = NT_STATUS_INVALID_HANDLE;
3697 goto out;
3698 }
3699
3700 if (!dir_fsp->is_directory) {
3701
3702 /*
3703 * Check to see if this is a mac fork of some kind.
3704 */
3705
3706 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3707 is_ntfs_stream_smb_fname(smb_fname)) {
3708 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3709 goto out;
3710 }
3711
3712 /*
3713 we need to handle the case when we get a
3714 relative open relative to a file and the
3715 pathname is blank - this is a reopen!
3716 (hint from demyn plantenberg)
3717 */
3718
3719 status = NT_STATUS_INVALID_HANDLE;
3720 goto out;
3721 }
3722
3723 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3724 /*
3725 * We're at the toplevel dir, the final file name
3726 * must not contain ./, as this is filtered out
3727 * normally by srvstr_get_path and unix_convert
3728 * explicitly rejects paths containing ./.
3729 */
3730 parent_fname = talloc_strdup(talloc_tos(), "");
3731 if (parent_fname == NULL) {
3732 status = NT_STATUS_NO_MEMORY;
3733 goto out;
3734 }
3735 } else {
3736 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3737
3738 /*
3739 * Copy in the base directory name.
3740 */
3741
3742 parent_fname = talloc_array(talloc_tos(), char,
3743 dir_name_len+2);
3744 if (parent_fname == NULL) {
3745 status = NT_STATUS_NO_MEMORY;
3746 goto out;
3747 }
3748 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3749 dir_name_len+1);
3750
3751 /*
3752 * Ensure it ends in a '/'.
3753 * We used TALLOC_SIZE +2 to add space for the '/'.
3754 */
3755
3756 if(dir_name_len
3757 && (parent_fname[dir_name_len-1] != '\\')
3758 && (parent_fname[dir_name_len-1] != '/')) {
3759 parent_fname[dir_name_len] = '/';
3760 parent_fname[dir_name_len+1] = '\0';
3761 }
3762 }
3763
3764 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3765 smb_fname->base_name);
3766 if (new_base_name == NULL) {
3767 status = NT_STATUS_NO_MEMORY;
3768 goto out;
3769 }
3770
3771 status = filename_convert(req,
3772 conn,
3773 req->flags2 & FLAGS2_DFS_PATHNAMES,
3774 new_base_name,
3775 0,
3776 NULL,
3777 smb_fname_out);
3778 if (!NT_STATUS_IS_OK(status)) {
3779 goto out;
3780 }
3781
3782 out:
3783 TALLOC_FREE(parent_fname);
3784 TALLOC_FREE(new_base_name);
3785 return status;
3786 }
3787
3788 NTSTATUS create_file_default(connection_struct *conn,
3789 struct smb_request *req,
3790 uint16_t root_dir_fid,
3791 struct smb_filename *smb_fname,
3792 uint32_t access_mask,
3793 uint32_t share_access,
3794 uint32_t create_disposition,
3795 uint32_t create_options,
3796 uint32_t file_attributes,
3797 uint32_t oplock_request,
3798 uint64_t allocation_size,
3799 uint32_t private_flags,
3800 struct security_descriptor *sd,
3801 struct ea_list *ea_list,
3802 files_struct **result,
3803 int *pinfo)
3804 {
3805 int info = FILE_WAS_OPENED;
3806 files_struct *fsp = NULL;
3807 NTSTATUS status;
3808 bool stream_name = false;
3809
3810 DEBUG(10,("create_file: access_mask = 0x%x "
3811 "file_attributes = 0x%x, share_access = 0x%x, "
3812 "create_disposition = 0x%x create_options = 0x%x "
3813 "oplock_request = 0x%x "
3814 "private_flags = 0x%x "
3815 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3816 "fname = %s\n",
3817 (unsigned int)access_mask,
3818 (unsigned int)file_attributes,
3819 (unsigned int)share_access,
3820 (unsigned int)create_disposition,
3821 (unsigned int)create_options,
3822 (unsigned int)oplock_request,
3823 (unsigned int)private_flags,
3824 (unsigned int)root_dir_fid,
3825 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3826
3827 /*
3828 * Calculate the filename from the root_dir_if if necessary.
3829 */
3830
3831 if (root_dir_fid != 0) {
3832 struct smb_filename *smb_fname_out = NULL;
3833 status = get_relative_fid_filename(conn, req, root_dir_fid,
3834 smb_fname, &smb_fname_out);
3835 if (!NT_STATUS_IS_OK(status)) {
3836 goto fail;
3837 }
3838 smb_fname = smb_fname_out;
3839 }
3840
3841 /*
3842 * Check to see if this is a mac fork of some kind.
3843 */
3844
3845 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3846 if (stream_name) {
3847 enum FAKE_FILE_TYPE fake_file_type;
3848
3849 fake_file_type = is_fake_file(smb_fname);
3850
3851 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3852
3853 /*
3854 * Here we go! support for changing the disk quotas
3855 * --metze
3856 *
3857 * We need to fake up to open this MAGIC QUOTA file
3858 * and return a valid FID.
3859 *
3860 * w2k close this file directly after openening xp
3861 * also tries a QUERY_FILE_INFO on the file and then
3862 * close it
3863 */
3864 status = open_fake_file(req, conn, req->vuid,
3865 fake_file_type, smb_fname,
3866 access_mask, &fsp);
3867 if (!NT_STATUS_IS_OK(status)) {
3868 goto fail;
3869 }
3870
3871 ZERO_STRUCT(smb_fname->st);
3872 goto done;
3873 }
3874
3875 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3876 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3877 goto fail;
3878 }
3879 }
3880
3881 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3882 int ret;
3883 smb_fname->stream_name = NULL;
3884 /* We have to handle this error here. */
3885 if (create_options & FILE_DIRECTORY_FILE) {
3886 status = NT_STATUS_NOT_A_DIRECTORY;
3887 goto fail;
3888 }
3889 if (lp_posix_pathnames()) {
3890 ret = SMB_VFS_LSTAT(conn, smb_fname);
3891 } else {
3892 ret = SMB_VFS_STAT(conn, smb_fname);
3893 }
3894
3895 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3896 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3897 goto fail;
3898 }
3899 }
3900
3901 status = create_file_unixpath(
3902 conn, req, smb_fname, access_mask, share_access,
3903 create_disposition, create_options, file_attributes,
3904 oplock_request, allocation_size, private_flags,
3905 sd, ea_list,
3906 &fsp, &info);
3907
3908 if (!NT_STATUS_IS_OK(status)) {
3909 goto fail;
3910 }
3911
3912 done:
3913 DEBUG(10, ("create_file: info=%d\n", info));
3914
3915 *result = fsp;
3916 if (pinfo != NULL) {
3917 *pinfo = info;
3918 }
3919 return NT_STATUS_OK;
3920
3921 fail:
3922 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3923
3924 if (fsp != NULL) {
3925 close_file(req, fsp, ERROR_CLOSE);
3926 fsp = NULL;
3927 }
3928 return status;
3929 }
reg import