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s3: Remove some else{} branches in smbd_calculate_maximum_allowed_access
[Samba/id10ts.git] / source3 / smbd / open.c
blobdb4831d3d25f0afb581003cd681435e6c55ded71
1 /*
2 Unix SMB/CIFS implementation.
3 file opening and share modes
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2004
6 Copyright (C) Volker Lendecke 2005
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "system/filesys.h"
24 #include "printing.h"
25 #include "smbd/smbd.h"
26 #include "smbd/globals.h"
27 #include "fake_file.h"
28 #include "../libcli/security/security.h"
29 #include "../librpc/gen_ndr/ndr_security.h"
30 #include "../librpc/gen_ndr/open_files.h"
31 #include "auth.h"
32 #include "messages.h"
33
34 extern const struct generic_mapping file_generic_mapping;
35
36 struct deferred_open_record {
37 bool delayed_for_oplocks;
38 struct file_id id;
39 };
40
41 /****************************************************************************
42 If the requester wanted DELETE_ACCESS and was rejected because
43 the file ACL didn't include DELETE_ACCESS, see if the parent ACL
44 ovverrides this.
45 ****************************************************************************/
46
47 static bool parent_override_delete(connection_struct *conn,
48 const struct smb_filename *smb_fname,
49 uint32_t access_mask,
50 uint32_t rejected_mask)
51 {
52 if ((access_mask & DELETE_ACCESS) &&
53 (rejected_mask & DELETE_ACCESS) &&
54 can_delete_file_in_directory(conn, smb_fname)) {
55 return true;
56 }
57 return false;
58 }
59
60 /****************************************************************************
61 Check if we have open rights.
62 ****************************************************************************/
63
64 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
65 const struct smb_filename *smb_fname,
66 uint32_t access_mask)
67 {
68 /* Check if we have rights to open. */
69 NTSTATUS status;
70 struct security_descriptor *sd = NULL;
71 uint32_t rejected_share_access;
72 uint32_t rejected_mask = access_mask;
73
74 rejected_share_access = access_mask & ~(conn->share_access);
75
76 if (rejected_share_access) {
77 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
78 "on %s (0x%x)\n",
79 (unsigned int)access_mask,
80 smb_fname_str_dbg(smb_fname),
81 (unsigned int)rejected_share_access ));
82 return NT_STATUS_ACCESS_DENIED;
83 }
84
85 if (get_current_uid(conn) == (uid_t)0) {
86 /* I'm sorry sir, I didn't know you were root... */
87 DEBUG(10,("smbd_check_access_rights: root override "
88 "on %s. Granting 0x%x\n",
89 smb_fname_str_dbg(smb_fname),
90 (unsigned int)access_mask ));
91 return NT_STATUS_OK;
92 }
93
94 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
95 DEBUG(10,("smbd_check_access_rights: not checking ACL "
96 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
97 smb_fname_str_dbg(smb_fname),
98 (unsigned int)access_mask ));
99 return NT_STATUS_OK;
100 }
101
102 if (access_mask == DELETE_ACCESS &&
103 VALID_STAT(smb_fname->st) &&
104 S_ISLNK(smb_fname->st.st_ex_mode)) {
105 /* We can always delete a symlink. */
106 DEBUG(10,("smbd_check_access_rights: not checking ACL "
107 "on DELETE_ACCESS on symlink %s.\n",
108 smb_fname_str_dbg(smb_fname) ));
109 return NT_STATUS_OK;
110 }
111
112 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
113 (SECINFO_OWNER |
114 SECINFO_GROUP |
115 SECINFO_DACL),&sd);
116
117 if (!NT_STATUS_IS_OK(status)) {
118 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
119 "on %s: %s\n",
120 smb_fname_str_dbg(smb_fname),
121 nt_errstr(status)));
122
123 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
124 goto access_denied;
125 }
126
127 return status;
128 }
129
130 /*
131 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
132 * owner WRITE_DAC and READ_CONTROL.
133 */
134 status = se_access_check(sd,
135 get_current_nttok(conn),
136 (access_mask & ~FILE_READ_ATTRIBUTES),
137 &rejected_mask);
138
139 DEBUG(10,("smbd_check_access_rights: file %s requesting "
140 "0x%x returning 0x%x (%s)\n",
141 smb_fname_str_dbg(smb_fname),
142 (unsigned int)access_mask,
143 (unsigned int)rejected_mask,
144 nt_errstr(status) ));
145
146 if (!NT_STATUS_IS_OK(status)) {
147 if (DEBUGLEVEL >= 10) {
148 DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
149 smb_fname_str_dbg(smb_fname) ));
150 NDR_PRINT_DEBUG(security_descriptor, sd);
151 }
152 }
153
154 TALLOC_FREE(sd);
155
156 if (NT_STATUS_IS_OK(status) ||
157 !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
158 return status;
159 }
160
161 /* Here we know status == NT_STATUS_ACCESS_DENIED. */
162
163 access_denied:
164
165 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
166 (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
167 (lp_map_readonly(SNUM(conn)) ||
168 lp_map_archive(SNUM(conn)) ||
169 lp_map_hidden(SNUM(conn)) ||
170 lp_map_system(SNUM(conn)))) {
171 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
172
173 DEBUG(10,("smbd_check_access_rights: "
174 "overrode "
175 "FILE_WRITE_ATTRIBUTES "
176 "on file %s\n",
177 smb_fname_str_dbg(smb_fname)));
178 }
179
180 if (parent_override_delete(conn,
181 smb_fname,
182 access_mask,
183 rejected_mask)) {
184 /* Were we trying to do an open
185 * for delete and didn't get DELETE
186 * access (only) ? Check if the
187 * directory allows DELETE_CHILD.
188 * See here:
189 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
190 * for details. */
191
192 rejected_mask &= ~DELETE_ACCESS;
193
194 DEBUG(10,("smbd_check_access_rights: "
195 "overrode "
196 "DELETE_ACCESS on "
197 "file %s\n",
198 smb_fname_str_dbg(smb_fname)));
199 }
200
201 if (rejected_mask != 0) {
202 return NT_STATUS_ACCESS_DENIED;
203 } else {
204 return NT_STATUS_OK;
205 }
206 }
207
208 static NTSTATUS check_parent_access(struct connection_struct *conn,
209 struct smb_filename *smb_fname,
210 uint32_t access_mask,
211 char **pp_parent_dir)
212 {
213 NTSTATUS status;
214 char *parent_dir = NULL;
215 struct security_descriptor *parent_sd = NULL;
216 uint32_t access_granted = 0;
217
218 if (!parent_dirname(talloc_tos(),
219 smb_fname->base_name,
220 &parent_dir,
221 NULL)) {
222 return NT_STATUS_NO_MEMORY;
223 }
224
225 if (pp_parent_dir) {
226 *pp_parent_dir = parent_dir;
227 }
228
229 if (get_current_uid(conn) == (uid_t)0) {
230 /* I'm sorry sir, I didn't know you were root... */
231 DEBUG(10,("check_parent_access: root override "
232 "on %s. Granting 0x%x\n",
233 smb_fname_str_dbg(smb_fname),
234 (unsigned int)access_mask ));
235 return NT_STATUS_OK;
236 }
237
238 status = SMB_VFS_GET_NT_ACL(conn,
239 parent_dir,
240 SECINFO_DACL,
241 &parent_sd);
242
243 if (!NT_STATUS_IS_OK(status)) {
244 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
245 "%s with error %s\n",
246 parent_dir,
247 nt_errstr(status)));
248 return status;
249 }
250
251 /*
252 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
253 * owner WRITE_DAC and READ_CONTROL.
254 */
255 status = se_access_check(parent_sd,
256 get_current_nttok(conn),
257 (access_mask & ~FILE_READ_ATTRIBUTES),
258 &access_granted);
259 if(!NT_STATUS_IS_OK(status)) {
260 DEBUG(5,("check_parent_access: access check "
261 "on directory %s for "
262 "path %s for mask 0x%x returned (0x%x) %s\n",
263 parent_dir,
264 smb_fname->base_name,
265 access_mask,
266 access_granted,
267 nt_errstr(status) ));
268 return status;
269 }
270
271 return NT_STATUS_OK;
272 }
273
274 /****************************************************************************
275 fd support routines - attempt to do a dos_open.
276 ****************************************************************************/
277
278 static NTSTATUS fd_open(struct connection_struct *conn,
279 files_struct *fsp,
280 int flags,
281 mode_t mode)
282 {
283 struct smb_filename *smb_fname = fsp->fsp_name;
284 NTSTATUS status = NT_STATUS_OK;
285
286 #ifdef O_NOFOLLOW
287 /*
288 * Never follow symlinks on a POSIX client. The
289 * client should be doing this.
290 */
291
292 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
293 flags |= O_NOFOLLOW;
294 }
295 #endif
296
297 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
298 if (fsp->fh->fd == -1) {
299 status = map_nt_error_from_unix(errno);
300 if (errno == EMFILE) {
301 static time_t last_warned = 0L;
302
303 if (time((time_t *) NULL) > last_warned) {
304 DEBUG(0,("Too many open files, unable "
305 "to open more! smbd's max "
306 "open files = %d\n",
307 lp_max_open_files()));
308 last_warned = time((time_t *) NULL);
309 }
310 }
311
312 }
313
314 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
315 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
316 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
317
318 return status;
319 }
320
321 /****************************************************************************
322 Close the file associated with a fsp.
323 ****************************************************************************/
324
325 NTSTATUS fd_close(files_struct *fsp)
326 {
327 int ret;
328
329 if (fsp->dptr) {
330 dptr_CloseDir(fsp);
331 }
332 if (fsp->fh->fd == -1) {
333 return NT_STATUS_OK; /* What we used to call a stat open. */
334 }
335 if (fsp->fh->ref_count > 1) {
336 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
337 }
338
339 ret = SMB_VFS_CLOSE(fsp);
340 fsp->fh->fd = -1;
341 if (ret == -1) {
342 return map_nt_error_from_unix(errno);
343 }
344 return NT_STATUS_OK;
345 }
346
347 /****************************************************************************
348 Change the ownership of a file to that of the parent directory.
349 Do this by fd if possible.
350 ****************************************************************************/
351
352 void change_file_owner_to_parent(connection_struct *conn,
353 const char *inherit_from_dir,
354 files_struct *fsp)
355 {
356 struct smb_filename *smb_fname_parent = NULL;
357 NTSTATUS status;
358 int ret;
359
360 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
361 NULL, NULL, &smb_fname_parent);
362 if (!NT_STATUS_IS_OK(status)) {
363 return;
364 }
365
366 ret = SMB_VFS_STAT(conn, smb_fname_parent);
367 if (ret == -1) {
368 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
369 "directory %s. Error was %s\n",
370 smb_fname_str_dbg(smb_fname_parent),
371 strerror(errno)));
372 TALLOC_FREE(smb_fname_parent);
373 return;
374 }
375
376 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
377 /* Already this uid - no need to change. */
378 DEBUG(10,("change_file_owner_to_parent: file %s "
379 "is already owned by uid %d\n",
380 fsp_str_dbg(fsp),
381 (int)fsp->fsp_name->st.st_ex_uid ));
382 TALLOC_FREE(smb_fname_parent);
383 return;
384 }
385
386 become_root();
387 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
388 unbecome_root();
389 if (ret == -1) {
390 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
391 "file %s to parent directory uid %u. Error "
392 "was %s\n", fsp_str_dbg(fsp),
393 (unsigned int)smb_fname_parent->st.st_ex_uid,
394 strerror(errno) ));
395 } else {
396 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
397 "parent directory uid %u.\n", fsp_str_dbg(fsp),
398 (unsigned int)smb_fname_parent->st.st_ex_uid));
399 /* Ensure the uid entry is updated. */
400 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
401 }
402
403 TALLOC_FREE(smb_fname_parent);
404 }
405
406 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
407 const char *inherit_from_dir,
408 const char *fname,
409 SMB_STRUCT_STAT *psbuf)
410 {
411 struct smb_filename *smb_fname_parent = NULL;
412 struct smb_filename *smb_fname_cwd = NULL;
413 char *saved_dir = NULL;
414 TALLOC_CTX *ctx = talloc_tos();
415 NTSTATUS status = NT_STATUS_OK;
416 int ret;
417
418 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
419 &smb_fname_parent);
420 if (!NT_STATUS_IS_OK(status)) {
421 return status;
422 }
423
424 ret = SMB_VFS_STAT(conn, smb_fname_parent);
425 if (ret == -1) {
426 status = map_nt_error_from_unix(errno);
427 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
428 "directory %s. Error was %s\n",
429 smb_fname_str_dbg(smb_fname_parent),
430 strerror(errno)));
431 goto out;
432 }
433
434 /* We've already done an lstat into psbuf, and we know it's a
435 directory. If we can cd into the directory and the dev/ino
436 are the same then we can safely chown without races as
437 we're locking the directory in place by being in it. This
438 should work on any UNIX (thanks tridge :-). JRA.
439 */
440
441 saved_dir = vfs_GetWd(ctx,conn);
442 if (!saved_dir) {
443 status = map_nt_error_from_unix(errno);
444 DEBUG(0,("change_dir_owner_to_parent: failed to get "
445 "current working directory. Error was %s\n",
446 strerror(errno)));
447 goto out;
448 }
449
450 /* Chdir into the new path. */
451 if (vfs_ChDir(conn, fname) == -1) {
452 status = map_nt_error_from_unix(errno);
453 DEBUG(0,("change_dir_owner_to_parent: failed to change "
454 "current working directory to %s. Error "
455 "was %s\n", fname, strerror(errno) ));
456 goto chdir;
457 }
458
459 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
460 &smb_fname_cwd);
461 if (!NT_STATUS_IS_OK(status)) {
462 return status;
463 }
464
465 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
466 if (ret == -1) {
467 status = map_nt_error_from_unix(errno);
468 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
469 "directory '.' (%s) Error was %s\n",
470 fname, strerror(errno)));
471 goto chdir;
472 }
473
474 /* Ensure we're pointing at the same place. */
475 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
476 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
477 DEBUG(0,("change_dir_owner_to_parent: "
478 "device/inode on directory %s changed. "
479 "Refusing to chown !\n", fname ));
480 status = NT_STATUS_ACCESS_DENIED;
481 goto chdir;
482 }
483
484 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
485 /* Already this uid - no need to change. */
486 DEBUG(10,("change_dir_owner_to_parent: directory %s "
487 "is already owned by uid %d\n",
488 fname,
489 (int)smb_fname_cwd->st.st_ex_uid ));
490 status = NT_STATUS_OK;
491 goto chdir;
492 }
493
494 become_root();
495 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
496 (gid_t)-1);
497 unbecome_root();
498 if (ret == -1) {
499 status = map_nt_error_from_unix(errno);
500 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
501 "directory %s to parent directory uid %u. "
502 "Error was %s\n", fname,
503 (unsigned int)smb_fname_parent->st.st_ex_uid,
504 strerror(errno) ));
505 } else {
506 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
507 "directory %s to parent directory uid %u.\n",
508 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
509 /* Ensure the uid entry is updated. */
510 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
511 }
512
513 chdir:
514 vfs_ChDir(conn,saved_dir);
515 out:
516 TALLOC_FREE(smb_fname_parent);
517 TALLOC_FREE(smb_fname_cwd);
518 return status;
519 }
520
521 /****************************************************************************
522 Open a file.
523 ****************************************************************************/
524
525 static NTSTATUS open_file(files_struct *fsp,
526 connection_struct *conn,
527 struct smb_request *req,
528 const char *parent_dir,
529 int flags,
530 mode_t unx_mode,
531 uint32 access_mask, /* client requested access mask. */
532 uint32 open_access_mask) /* what we're actually using in the open. */
533 {
534 struct smb_filename *smb_fname = fsp->fsp_name;
535 NTSTATUS status = NT_STATUS_OK;
536 int accmode = (flags & O_ACCMODE);
537 int local_flags = flags;
538 bool file_existed = VALID_STAT(fsp->fsp_name->st);
539 bool file_created = false;
540
541 fsp->fh->fd = -1;
542 errno = EPERM;
543
544 /* Check permissions */
545
546 /*
547 * This code was changed after seeing a client open request
548 * containing the open mode of (DENY_WRITE/read-only) with
549 * the 'create if not exist' bit set. The previous code
550 * would fail to open the file read only on a read-only share
551 * as it was checking the flags parameter directly against O_RDONLY,
552 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
553 * JRA.
554 */
555
556 if (!CAN_WRITE(conn)) {
557 /* It's a read-only share - fail if we wanted to write. */
558 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
559 DEBUG(3,("Permission denied opening %s\n",
560 smb_fname_str_dbg(smb_fname)));
561 return NT_STATUS_ACCESS_DENIED;
562 } else if(flags & O_CREAT) {
563 /* We don't want to write - but we must make sure that
564 O_CREAT doesn't create the file if we have write
565 access into the directory.
566 */
567 flags &= ~(O_CREAT|O_EXCL);
568 local_flags &= ~(O_CREAT|O_EXCL);
569 }
570 }
571
572 /*
573 * This little piece of insanity is inspired by the
574 * fact that an NT client can open a file for O_RDONLY,
575 * but set the create disposition to FILE_EXISTS_TRUNCATE.
576 * If the client *can* write to the file, then it expects to
577 * truncate the file, even though it is opening for readonly.
578 * Quicken uses this stupid trick in backup file creation...
579 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
580 * for helping track this one down. It didn't bite us in 2.0.x
581 * as we always opened files read-write in that release. JRA.
582 */
583
584 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
585 DEBUG(10,("open_file: truncate requested on read-only open "
586 "for file %s\n", smb_fname_str_dbg(smb_fname)));
587 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
588 }
589
590 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
591 (!file_existed && (local_flags & O_CREAT)) ||
592 ((local_flags & O_TRUNC) == O_TRUNC) ) {
593 const char *wild;
594
595 /*
596 * We can't actually truncate here as the file may be locked.
597 * open_file_ntcreate will take care of the truncate later. JRA.
598 */
599
600 local_flags &= ~O_TRUNC;
601
602 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
603 /*
604 * We would block on opening a FIFO with no one else on the
605 * other end. Do what we used to do and add O_NONBLOCK to the
606 * open flags. JRA.
607 */
608
609 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
610 local_flags |= O_NONBLOCK;
611 }
612 #endif
613
614 /* Don't create files with Microsoft wildcard characters. */
615 if (fsp->base_fsp) {
616 /*
617 * wildcard characters are allowed in stream names
618 * only test the basefilename
619 */
620 wild = fsp->base_fsp->fsp_name->base_name;
621 } else {
622 wild = smb_fname->base_name;
623 }
624 if ((local_flags & O_CREAT) && !file_existed &&
625 ms_has_wild(wild)) {
626 return NT_STATUS_OBJECT_NAME_INVALID;
627 }
628
629 /* Can we access this file ? */
630 if (!fsp->base_fsp) {
631 /* Only do this check on non-stream open. */
632 if (file_existed) {
633 status = smbd_check_access_rights(conn,
634 smb_fname,
635 access_mask);
636 } else if (local_flags & O_CREAT){
637 status = check_parent_access(conn,
638 smb_fname,
639 SEC_DIR_ADD_FILE,
640 NULL);
641 } else {
642 /* File didn't exist and no O_CREAT. */
643 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
644 }
645 if (!NT_STATUS_IS_OK(status)) {
646 DEBUG(10,("open_file: "
647 "%s on file "
648 "%s returned %s\n",
649 file_existed ?
650 "smbd_check_access_rights" :
651 "check_parent_access",
652 smb_fname_str_dbg(smb_fname),
653 nt_errstr(status) ));
654 return status;
655 }
656 }
657
658 /* Actually do the open */
659 status = fd_open(conn, fsp, local_flags, unx_mode);
660 if (!NT_STATUS_IS_OK(status)) {
661 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
662 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
663 nt_errstr(status),local_flags,flags));
664 return status;
665 }
666
667 if ((local_flags & O_CREAT) && !file_existed) {
668 file_created = true;
669 }
670
671 } else {
672 fsp->fh->fd = -1; /* What we used to call a stat open. */
673 if (!file_existed) {
674 /* File must exist for a stat open. */
675 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
676 }
677
678 status = smbd_check_access_rights(conn,
679 smb_fname,
680 access_mask);
681
682 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
683 fsp->posix_open &&
684 S_ISLNK(smb_fname->st.st_ex_mode)) {
685 /* This is a POSIX stat open for delete
686 * or rename on a symlink that points
687 * nowhere. Allow. */
688 DEBUG(10,("open_file: allowing POSIX "
689 "open on bad symlink %s\n",
690 smb_fname_str_dbg(smb_fname)));
691 status = NT_STATUS_OK;
692 }
693
694 if (!NT_STATUS_IS_OK(status)) {
695 DEBUG(10,("open_file: "
696 "smbd_check_access_rights on file "
697 "%s returned %s\n",
698 smb_fname_str_dbg(smb_fname),
699 nt_errstr(status) ));
700 return status;
701 }
702 }
703
704 if (!file_existed) {
705 int ret;
706
707 if (fsp->fh->fd == -1) {
708 ret = SMB_VFS_STAT(conn, smb_fname);
709 } else {
710 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
711 /* If we have an fd, this stat should succeed. */
712 if (ret == -1) {
713 DEBUG(0,("Error doing fstat on open file %s "
714 "(%s)\n",
715 smb_fname_str_dbg(smb_fname),
716 strerror(errno) ));
717 }
718 }
719
720 /* For a non-io open, this stat failing means file not found. JRA */
721 if (ret == -1) {
722 status = map_nt_error_from_unix(errno);
723 fd_close(fsp);
724 return status;
725 }
726
727 if (file_created) {
728 bool need_re_stat = false;
729 /* Do all inheritance work after we've
730 done a successful stat call and filled
731 in the stat struct in fsp->fsp_name. */
732
733 /* Inherit the ACL if required */
734 if (lp_inherit_perms(SNUM(conn))) {
735 inherit_access_posix_acl(conn, parent_dir,
736 smb_fname->base_name,
737 unx_mode);
738 need_re_stat = true;
739 }
740
741 /* Change the owner if required. */
742 if (lp_inherit_owner(SNUM(conn))) {
743 change_file_owner_to_parent(conn, parent_dir,
744 fsp);
745 need_re_stat = true;
746 }
747
748 if (need_re_stat) {
749 if (fsp->fh->fd == -1) {
750 ret = SMB_VFS_STAT(conn, smb_fname);
751 } else {
752 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
753 /* If we have an fd, this stat should succeed. */
754 if (ret == -1) {
755 DEBUG(0,("Error doing fstat on open file %s "
756 "(%s)\n",
757 smb_fname_str_dbg(smb_fname),
758 strerror(errno) ));
759 }
760 }
761 }
762
763 notify_fname(conn, NOTIFY_ACTION_ADDED,
764 FILE_NOTIFY_CHANGE_FILE_NAME,
765 smb_fname->base_name);
766 }
767 }
768
769 /*
770 * POSIX allows read-only opens of directories. We don't
771 * want to do this (we use a different code path for this)
772 * so catch a directory open and return an EISDIR. JRA.
773 */
774
775 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
776 fd_close(fsp);
777 errno = EISDIR;
778 return NT_STATUS_FILE_IS_A_DIRECTORY;
779 }
780
781 fsp->mode = smb_fname->st.st_ex_mode;
782 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
783 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
784 fsp->file_pid = req ? req->smbpid : 0;
785 fsp->can_lock = True;
786 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
787 if (!CAN_WRITE(conn)) {
788 fsp->can_write = False;
789 } else {
790 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
791 True : False;
792 }
793 fsp->print_file = NULL;
794 fsp->modified = False;
795 fsp->sent_oplock_break = NO_BREAK_SENT;
796 fsp->is_directory = False;
797 if (conn->aio_write_behind_list &&
798 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
799 conn->case_sensitive)) {
800 fsp->aio_write_behind = True;
801 }
802
803 fsp->wcp = NULL; /* Write cache pointer. */
804
805 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
806 conn->session_info->unix_info->unix_name,
807 smb_fname_str_dbg(smb_fname),
808 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
809 conn->num_files_open));
810
811 errno = 0;
812 return NT_STATUS_OK;
813 }
814
815 /****************************************************************************
816 Check if we can open a file with a share mode.
817 Returns True if conflict, False if not.
818 ****************************************************************************/
819
820 static bool share_conflict(struct share_mode_entry *entry,
821 uint32 access_mask,
822 uint32 share_access)
823 {
824 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
825 "entry->share_access = 0x%x, "
826 "entry->private_options = 0x%x\n",
827 (unsigned int)entry->access_mask,
828 (unsigned int)entry->share_access,
829 (unsigned int)entry->private_options));
830
831 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
832 (unsigned int)access_mask, (unsigned int)share_access));
833
834 if ((entry->access_mask & (FILE_WRITE_DATA|
835 FILE_APPEND_DATA|
836 FILE_READ_DATA|
837 FILE_EXECUTE|
838 DELETE_ACCESS)) == 0) {
839 DEBUG(10,("share_conflict: No conflict due to "
840 "entry->access_mask = 0x%x\n",
841 (unsigned int)entry->access_mask ));
842 return False;
843 }
844
845 if ((access_mask & (FILE_WRITE_DATA|
846 FILE_APPEND_DATA|
847 FILE_READ_DATA|
848 FILE_EXECUTE|
849 DELETE_ACCESS)) == 0) {
850 DEBUG(10,("share_conflict: No conflict due to "
851 "access_mask = 0x%x\n",
852 (unsigned int)access_mask ));
853 return False;
854 }
855
856 #if 1 /* JRA TEST - Superdebug. */
857 #define CHECK_MASK(num, am, right, sa, share) \
858 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
859 (unsigned int)(num), (unsigned int)(am), \
860 (unsigned int)(right), (unsigned int)(am)&(right) )); \
861 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
862 (unsigned int)(num), (unsigned int)(sa), \
863 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
864 if (((am) & (right)) && !((sa) & (share))) { \
865 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
866 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
867 (unsigned int)(share) )); \
868 return True; \
869 }
870 #else
871 #define CHECK_MASK(num, am, right, sa, share) \
872 if (((am) & (right)) && !((sa) & (share))) { \
873 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
874 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
875 (unsigned int)(share) )); \
876 return True; \
877 }
878 #endif
879
880 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
881 share_access, FILE_SHARE_WRITE);
882 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
883 entry->share_access, FILE_SHARE_WRITE);
884
885 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
886 share_access, FILE_SHARE_READ);
887 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
888 entry->share_access, FILE_SHARE_READ);
889
890 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
891 share_access, FILE_SHARE_DELETE);
892 CHECK_MASK(6, access_mask, DELETE_ACCESS,
893 entry->share_access, FILE_SHARE_DELETE);
894
895 DEBUG(10,("share_conflict: No conflict.\n"));
896 return False;
897 }
898
899 #if defined(DEVELOPER)
900 static void validate_my_share_entries(struct smbd_server_connection *sconn,
901 int num,
902 struct share_mode_entry *share_entry)
903 {
904 files_struct *fsp;
905
906 if (!procid_is_me(&share_entry->pid)) {
907 return;
908 }
909
910 if (is_deferred_open_entry(share_entry) &&
911 !open_was_deferred(sconn, share_entry->op_mid)) {
912 char *str = talloc_asprintf(talloc_tos(),
913 "Got a deferred entry without a request: "
914 "PANIC: %s\n",
915 share_mode_str(talloc_tos(), num, share_entry));
916 smb_panic(str);
917 }
918
919 if (!is_valid_share_mode_entry(share_entry)) {
920 return;
921 }
922
923 fsp = file_find_dif(sconn, share_entry->id,
924 share_entry->share_file_id);
925 if (!fsp) {
926 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
927 share_mode_str(talloc_tos(), num, share_entry) ));
928 smb_panic("validate_my_share_entries: Cannot match a "
929 "share entry with an open file\n");
930 }
931
932 if (is_deferred_open_entry(share_entry)) {
933 goto panic;
934 }
935
936 if ((share_entry->op_type == NO_OPLOCK) &&
937 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
938 /* Someone has already written to it, but I haven't yet
939 * noticed */
940 return;
941 }
942
943 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
944 goto panic;
945 }
946
947 return;
948
949 panic:
950 {
951 char *str;
952 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
953 share_mode_str(talloc_tos(), num, share_entry) ));
954 str = talloc_asprintf(talloc_tos(),
955 "validate_my_share_entries: "
956 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
957 fsp->fsp_name->base_name,
958 (unsigned int)fsp->oplock_type,
959 (unsigned int)share_entry->op_type );
960 smb_panic(str);
961 }
962 }
963 #endif
964
965 bool is_stat_open(uint32 access_mask)
966 {
967 return (access_mask &&
968 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
969 FILE_WRITE_ATTRIBUTES))==0) &&
970 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
971 FILE_WRITE_ATTRIBUTES)) != 0));
972 }
973
974 /****************************************************************************
975 Deal with share modes
976 Invarient: Share mode must be locked on entry and exit.
977 Returns -1 on error, or number of share modes on success (may be zero).
978 ****************************************************************************/
979
980 static NTSTATUS open_mode_check(connection_struct *conn,
981 struct share_mode_lock *lck,
982 uint32_t name_hash,
983 uint32 access_mask,
984 uint32 share_access,
985 uint32 create_options,
986 bool *file_existed)
987 {
988 int i;
989
990 if(lck->num_share_modes == 0) {
991 return NT_STATUS_OK;
992 }
993
994 *file_existed = True;
995
996 /* A delete on close prohibits everything */
997
998 if (is_delete_on_close_set(lck, name_hash)) {
999 return NT_STATUS_DELETE_PENDING;
1000 }
1001
1002 if (is_stat_open(access_mask)) {
1003 /* Stat open that doesn't trigger oplock breaks or share mode
1004 * checks... ! JRA. */
1005 return NT_STATUS_OK;
1006 }
1007
1008 /*
1009 * Check if the share modes will give us access.
1010 */
1011
1012 #if defined(DEVELOPER)
1013 for(i = 0; i < lck->num_share_modes; i++) {
1014 validate_my_share_entries(conn->sconn, i,
1015 &lck->share_modes[i]);
1016 }
1017 #endif
1018
1019 if (!lp_share_modes(SNUM(conn))) {
1020 return NT_STATUS_OK;
1021 }
1022
1023 /* Now we check the share modes, after any oplock breaks. */
1024 for(i = 0; i < lck->num_share_modes; i++) {
1025
1026 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1027 continue;
1028 }
1029
1030 /* someone else has a share lock on it, check to see if we can
1031 * too */
1032 if (share_conflict(&lck->share_modes[i],
1033 access_mask, share_access)) {
1034 return NT_STATUS_SHARING_VIOLATION;
1035 }
1036 }
1037
1038 return NT_STATUS_OK;
1039 }
1040
1041 static bool is_delete_request(files_struct *fsp) {
1042 return ((fsp->access_mask == DELETE_ACCESS) &&
1043 (fsp->oplock_type == NO_OPLOCK));
1044 }
1045
1046 /*
1047 * Send a break message to the oplock holder and delay the open for
1048 * our client.
1049 */
1050
1051 static NTSTATUS send_break_message(files_struct *fsp,
1052 struct share_mode_entry *exclusive,
1053 uint64_t mid,
1054 int oplock_request)
1055 {
1056 NTSTATUS status;
1057 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1058
1059 DEBUG(10, ("Sending break request to PID %s\n",
1060 procid_str_static(&exclusive->pid)));
1061 exclusive->op_mid = mid;
1062
1063 /* Create the message. */
1064 share_mode_entry_to_message(msg, exclusive);
1065
1066 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1067 don't want this set in the share mode struct pointed to by lck. */
1068
1069 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1070 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1071 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1072 }
1073
1074 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1075 MSG_SMB_BREAK_REQUEST,
1076 (uint8 *)msg,
1077 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1078 if (!NT_STATUS_IS_OK(status)) {
1079 DEBUG(3, ("Could not send oplock break message: %s\n",
1080 nt_errstr(status)));
1081 }
1082
1083 return status;
1084 }
1085
1086 /*
1087 * Return share_mode_entry pointers for :
1088 * 1). Batch oplock entry.
1089 * 2). Batch or exclusive oplock entry (may be identical to #1).
1090 * bool have_level2_oplock
1091 * bool have_no_oplock.
1092 * Do internal consistency checks on the share mode for a file.
1093 */
1094
1095 static void find_oplock_types(files_struct *fsp,
1096 int oplock_request,
1097 const struct share_mode_lock *lck,
1098 struct share_mode_entry **pp_batch,
1099 struct share_mode_entry **pp_ex_or_batch,
1100 bool *got_level2,
1101 bool *got_no_oplock)
1102 {
1103 int i;
1104
1105 *pp_batch = NULL;
1106 *pp_ex_or_batch = NULL;
1107 *got_level2 = false;
1108 *got_no_oplock = false;
1109
1110 /* Ignore stat or internal opens, as is done in
1111 delay_for_batch_oplocks() and
1112 delay_for_exclusive_oplocks().
1113 */
1114 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1115 return;
1116 }
1117
1118 for (i=0; i<lck->num_share_modes; i++) {
1119 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1120 continue;
1121 }
1122
1123 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1124 is_stat_open(lck->share_modes[i].access_mask)) {
1125 /* We ignore stat opens in the table - they
1126 always have NO_OPLOCK and never get or
1127 cause breaks. JRA. */
1128 continue;
1129 }
1130
1131 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1132 /* batch - can only be one. */
1133 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1134 smb_panic("Bad batch oplock entry.");
1135 }
1136 *pp_batch = &lck->share_modes[i];
1137 }
1138
1139 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1140 /* Exclusive or batch - can only be one. */
1141 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1142 smb_panic("Bad exclusive or batch oplock entry.");
1143 }
1144 *pp_ex_or_batch = &lck->share_modes[i];
1145 }
1146
1147 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1148 if (*pp_batch || *pp_ex_or_batch) {
1149 smb_panic("Bad levelII oplock entry.");
1150 }
1151 *got_level2 = true;
1152 }
1153
1154 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1155 if (*pp_batch || *pp_ex_or_batch) {
1156 smb_panic("Bad no oplock entry.");
1157 }
1158 *got_no_oplock = true;
1159 }
1160 }
1161 }
1162
1163 static bool delay_for_batch_oplocks(files_struct *fsp,
1164 uint64_t mid,
1165 int oplock_request,
1166 struct share_mode_entry *batch_entry)
1167 {
1168 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1169 return false;
1170 }
1171 if (batch_entry == NULL) {
1172 return false;
1173 }
1174
1175 /* Found a batch oplock */
1176 send_break_message(fsp, batch_entry, mid, oplock_request);
1177 return true;
1178 }
1179
1180 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1181 uint64_t mid,
1182 int oplock_request,
1183 struct share_mode_entry *ex_entry)
1184 {
1185 bool delay_it;
1186
1187 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1188 return false;
1189 }
1190 if (ex_entry == NULL) {
1191 return false;
1192 }
1193
1194 /* Found an exclusive or batch oplock */
1195
1196 delay_it = is_delete_request(fsp) ?
1197 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1198
1199 if (!delay_it) {
1200 return false;
1201 }
1202
1203 send_break_message(fsp, ex_entry, mid, oplock_request);
1204 return true;
1205 }
1206
1207 static void grant_fsp_oplock_type(files_struct *fsp,
1208 const struct byte_range_lock *br_lck,
1209 int oplock_request,
1210 bool got_level2_oplock,
1211 bool got_a_none_oplock)
1212 {
1213 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1214 lp_level2_oplocks(SNUM(fsp->conn));
1215
1216 /* Start by granting what the client asked for,
1217 but ensure no SAMBA_PRIVATE bits can be set. */
1218 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1219
1220 if (oplock_request & INTERNAL_OPEN_ONLY) {
1221 /* No oplocks on internal open. */
1222 fsp->oplock_type = NO_OPLOCK;
1223 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1224 fsp->oplock_type, fsp_str_dbg(fsp)));
1225 return;
1226 } else if (br_lck && br_lck->num_locks > 0) {
1227 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1228 fsp_str_dbg(fsp)));
1229 fsp->oplock_type = NO_OPLOCK;
1230 }
1231
1232 if (is_stat_open(fsp->access_mask)) {
1233 /* Leave the value already set. */
1234 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1235 fsp->oplock_type, fsp_str_dbg(fsp)));
1236 return;
1237 }
1238
1239 /*
1240 * Match what was requested (fsp->oplock_type) with
1241 * what was found in the existing share modes.
1242 */
1243
1244 if (got_a_none_oplock) {
1245 fsp->oplock_type = NO_OPLOCK;
1246 } else if (got_level2_oplock) {
1247 if (fsp->oplock_type == NO_OPLOCK ||
1248 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1249 /* Store a level2 oplock, but don't tell the client */
1250 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1251 } else {
1252 fsp->oplock_type = LEVEL_II_OPLOCK;
1253 }
1254 } else {
1255 /* All share_mode_entries are placeholders or deferred.
1256 * Silently upgrade to fake levelII if the client didn't
1257 * ask for an oplock. */
1258 if (fsp->oplock_type == NO_OPLOCK) {
1259 /* Store a level2 oplock, but don't tell the client */
1260 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1261 }
1262 }
1263
1264 /*
1265 * Don't grant level2 to clients that don't want them
1266 * or if we've turned them off.
1267 */
1268 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1269 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1270 }
1271
1272 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1273 fsp->oplock_type, fsp_str_dbg(fsp)));
1274 }
1275
1276 bool request_timed_out(struct timeval request_time,
1277 struct timeval timeout)
1278 {
1279 struct timeval now, end_time;
1280 GetTimeOfDay(&now);
1281 end_time = timeval_sum(&request_time, &timeout);
1282 return (timeval_compare(&end_time, &now) < 0);
1283 }
1284
1285 /****************************************************************************
1286 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1287 ****************************************************************************/
1288
1289 static void defer_open(struct share_mode_lock *lck,
1290 struct timeval request_time,
1291 struct timeval timeout,
1292 struct smb_request *req,
1293 struct deferred_open_record *state)
1294 {
1295 int i;
1296
1297 /* Paranoia check */
1298
1299 for (i=0; i<lck->num_share_modes; i++) {
1300 struct share_mode_entry *e = &lck->share_modes[i];
1301
1302 if (is_deferred_open_entry(e) &&
1303 procid_is_me(&e->pid) &&
1304 (e->op_mid == req->mid)) {
1305 DEBUG(0, ("Trying to defer an already deferred "
1306 "request: mid=%llu, exiting\n",
1307 (unsigned long long)req->mid));
1308 exit_server("attempt to defer a deferred request");
1309 }
1310 }
1311
1312 /* End paranoia check */
1313
1314 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1315 "open entry for mid %llu\n",
1316 (unsigned int)request_time.tv_sec,
1317 (unsigned int)request_time.tv_usec,
1318 (unsigned long long)req->mid));
1319
1320 if (!push_deferred_open_message_smb(req, request_time, timeout,
1321 state->id, (char *)state, sizeof(*state))) {
1322 exit_server("push_deferred_open_message_smb failed");
1323 }
1324 add_deferred_open(lck, req->mid, request_time,
1325 messaging_server_id(req->sconn->msg_ctx), state->id);
1326 }
1327
1328
1329 /****************************************************************************
1330 On overwrite open ensure that the attributes match.
1331 ****************************************************************************/
1332
1333 bool open_match_attributes(connection_struct *conn,
1334 uint32 old_dos_attr,
1335 uint32 new_dos_attr,
1336 mode_t existing_unx_mode,
1337 mode_t new_unx_mode,
1338 mode_t *returned_unx_mode)
1339 {
1340 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1341
1342 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1343 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1344
1345 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1346 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1347 *returned_unx_mode = new_unx_mode;
1348 } else {
1349 *returned_unx_mode = (mode_t)0;
1350 }
1351
1352 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1353 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1354 "returned_unx_mode = 0%o\n",
1355 (unsigned int)old_dos_attr,
1356 (unsigned int)existing_unx_mode,
1357 (unsigned int)new_dos_attr,
1358 (unsigned int)*returned_unx_mode ));
1359
1360 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1361 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1362 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1363 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1364 return False;
1365 }
1366 }
1367 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1368 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1369 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1370 return False;
1371 }
1372 }
1373 return True;
1374 }
1375
1376 /****************************************************************************
1377 Special FCB or DOS processing in the case of a sharing violation.
1378 Try and find a duplicated file handle.
1379 ****************************************************************************/
1380
1381 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1382 connection_struct *conn,
1383 files_struct *fsp_to_dup_into,
1384 const struct smb_filename *smb_fname,
1385 struct file_id id,
1386 uint16 file_pid,
1387 uint16 vuid,
1388 uint32 access_mask,
1389 uint32 share_access,
1390 uint32 create_options)
1391 {
1392 files_struct *fsp;
1393
1394 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1395 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1396
1397 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1398 fsp = file_find_di_next(fsp)) {
1399
1400 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1401 "vuid = %u, file_pid = %u, private_options = 0x%x "
1402 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1403 fsp->fh->fd, (unsigned int)fsp->vuid,
1404 (unsigned int)fsp->file_pid,
1405 (unsigned int)fsp->fh->private_options,
1406 (unsigned int)fsp->access_mask ));
1407
1408 if (fsp->fh->fd != -1 &&
1409 fsp->vuid == vuid &&
1410 fsp->file_pid == file_pid &&
1411 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1412 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1413 (fsp->access_mask & FILE_WRITE_DATA) &&
1414 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1415 strequal(fsp->fsp_name->stream_name,
1416 smb_fname->stream_name)) {
1417 DEBUG(10,("fcb_or_dos_open: file match\n"));
1418 break;
1419 }
1420 }
1421
1422 if (!fsp) {
1423 return NT_STATUS_NOT_FOUND;
1424 }
1425
1426 /* quite an insane set of semantics ... */
1427 if (is_executable(smb_fname->base_name) &&
1428 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1429 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1430 return NT_STATUS_INVALID_PARAMETER;
1431 }
1432
1433 /* We need to duplicate this fsp. */
1434 return dup_file_fsp(req, fsp, access_mask, share_access,
1435 create_options, fsp_to_dup_into);
1436 }
1437
1438 static void schedule_defer_open(struct share_mode_lock *lck,
1439 struct timeval request_time,
1440 struct smb_request *req)
1441 {
1442 struct deferred_open_record state;
1443
1444 /* This is a relative time, added to the absolute
1445 request_time value to get the absolute timeout time.
1446 Note that if this is the second or greater time we enter
1447 this codepath for this particular request mid then
1448 request_time is left as the absolute time of the *first*
1449 time this request mid was processed. This is what allows
1450 the request to eventually time out. */
1451
1452 struct timeval timeout;
1453
1454 /* Normally the smbd we asked should respond within
1455 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1456 * the client did, give twice the timeout as a safety
1457 * measure here in case the other smbd is stuck
1458 * somewhere else. */
1459
1460 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1461
1462 /* Nothing actually uses state.delayed_for_oplocks
1463 but it's handy to differentiate in debug messages
1464 between a 30 second delay due to oplock break, and
1465 a 1 second delay for share mode conflicts. */
1466
1467 state.delayed_for_oplocks = True;
1468 state.id = lck->id;
1469
1470 if (!request_timed_out(request_time, timeout)) {
1471 defer_open(lck, request_time, timeout, req, &state);
1472 }
1473 }
1474
1475 /****************************************************************************
1476 Work out what access_mask to use from what the client sent us.
1477 ****************************************************************************/
1478
1479 static NTSTATUS smbd_calculate_maximum_allowed_access(
1480 connection_struct *conn,
1481 const struct smb_filename *smb_fname,
1482 bool file_existed,
1483 uint32_t *p_access_mask)
1484 {
1485 NTSTATUS status;
1486
1487 if (get_current_uid(conn) == (uid_t)0) {
1488 *p_access_mask |= FILE_GENERIC_ALL;
1489 return NT_STATUS_OK;
1490 }
1491
1492 if (file_existed) {
1493 struct security_descriptor *sd;
1494 uint32_t access_granted = 0;
1495
1496 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1497 (SECINFO_OWNER |
1498 SECINFO_GROUP |
1499 SECINFO_DACL),&sd);
1500
1501 if (!NT_STATUS_IS_OK(status)) {
1502 DEBUG(10,("smbd_calculate_access_mask: "
1503 "Could not get acl on file %s: %s\n",
1504 smb_fname_str_dbg(smb_fname),
1505 nt_errstr(status)));
1506 return NT_STATUS_ACCESS_DENIED;
1507 }
1508
1509 /*
1510 * Never test FILE_READ_ATTRIBUTES. se_access_check()
1511 * also takes care of owner WRITE_DAC and READ_CONTROL.
1512 */
1513 status = se_access_check(sd,
1514 get_current_nttok(conn),
1515 (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1516 &access_granted);
1517
1518 TALLOC_FREE(sd);
1519
1520 if (!NT_STATUS_IS_OK(status)) {
1521 DEBUG(10, ("smbd_calculate_access_mask: "
1522 "Access denied on file %s: "
1523 "when calculating maximum access\n",
1524 smb_fname_str_dbg(smb_fname)));
1525 return NT_STATUS_ACCESS_DENIED;
1526 }
1527
1528 *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1529 return NT_STATUS_OK;
1530 }
1531
1532 *p_access_mask = FILE_GENERIC_ALL;
1533 return NT_STATUS_OK;
1534 }
1535
1536 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1537 const struct smb_filename *smb_fname,
1538 bool file_existed,
1539 uint32_t access_mask,
1540 uint32_t *access_mask_out)
1541 {
1542 NTSTATUS status;
1543 uint32_t orig_access_mask = access_mask;
1544 uint32_t rejected_share_access;
1545
1546 /*
1547 * Convert GENERIC bits to specific bits.
1548 */
1549
1550 se_map_generic(&access_mask, &file_generic_mapping);
1551
1552 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1553 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1554
1555 status = smbd_calculate_maximum_allowed_access(
1556 conn, smb_fname, file_existed, &access_mask);
1557
1558 if (!NT_STATUS_IS_OK(status)) {
1559 return status;
1560 }
1561
1562 access_mask &= conn->share_access;
1563 }
1564
1565 rejected_share_access = access_mask & ~(conn->share_access);
1566
1567 if (rejected_share_access) {
1568 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1569 "file %s: rejected by share access mask[0x%08X] "
1570 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1571 smb_fname_str_dbg(smb_fname),
1572 conn->share_access,
1573 orig_access_mask, access_mask,
1574 rejected_share_access));
1575 return NT_STATUS_ACCESS_DENIED;
1576 }
1577
1578 *access_mask_out = access_mask;
1579 return NT_STATUS_OK;
1580 }
1581
1582 /****************************************************************************
1583 Remove the deferred open entry under lock.
1584 ****************************************************************************/
1585
1586 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1587 struct server_id pid)
1588 {
1589 struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1590 NULL, NULL, NULL);
1591 if (lck == NULL) {
1592 DEBUG(0, ("could not get share mode lock\n"));
1593 return;
1594 }
1595 del_deferred_open_entry(lck, mid, pid);
1596 TALLOC_FREE(lck);
1597 }
1598
1599 /****************************************************************
1600 Ensure we get the brlock lock followed by the share mode lock
1601 in the correct order to prevent deadlocks if other smbd's are
1602 using the brlock database on this file simultaneously with this open
1603 (that code also gets the locks in brlock -> share mode lock order).
1604 ****************************************************************/
1605
1606 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1607 files_struct *fsp,
1608 const struct file_id id,
1609 const char *connectpath,
1610 const struct smb_filename *smb_fname,
1611 const struct timespec *p_old_write_time,
1612 struct share_mode_lock **p_lck,
1613 struct byte_range_lock **p_br_lck)
1614 {
1615 /* Ordering - we must get the br_lck for this
1616 file before the share mode. */
1617 if (lp_locking(fsp->conn->params)) {
1618 *p_br_lck = brl_get_locks_readonly(fsp);
1619 if (*p_br_lck == NULL) {
1620 DEBUG(0, ("Could not get br_lock\n"));
1621 return false;
1622 }
1623 /* Note - we don't need to free the returned
1624 br_lck explicitly as it was allocated on talloc_tos()
1625 and so will be autofreed (and release the lock)
1626 once the frame context disappears.
1627
1628 If it was set to fsp->brlock_rec then it was
1629 talloc_move'd to hang off the fsp pointer and
1630 in this case is guarenteed to not be holding the
1631 lock on the brlock database. */
1632 }
1633
1634 *p_lck = get_share_mode_lock(mem_ctx,
1635 id,
1636 connectpath,
1637 smb_fname,
1638 p_old_write_time);
1639
1640 if (*p_lck == NULL) {
1641 DEBUG(0, ("Could not get share mode lock\n"));
1642 TALLOC_FREE(*p_br_lck);
1643 return false;
1644 }
1645 return true;
1646 }
1647
1648 /****************************************************************************
1649 Open a file with a share mode. Passed in an already created files_struct *.
1650 ****************************************************************************/
1651
1652 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1653 struct smb_request *req,
1654 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1655 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1656 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1657 uint32 create_options, /* options such as delete on close. */
1658 uint32 new_dos_attributes, /* attributes used for new file. */
1659 int oplock_request, /* internal Samba oplock codes. */
1660 /* Information (FILE_EXISTS etc.) */
1661 uint32_t private_flags, /* Samba specific flags. */
1662 int *pinfo,
1663 files_struct *fsp)
1664 {
1665 struct smb_filename *smb_fname = fsp->fsp_name;
1666 int flags=0;
1667 int flags2=0;
1668 bool file_existed = VALID_STAT(smb_fname->st);
1669 bool def_acl = False;
1670 bool posix_open = False;
1671 bool new_file_created = False;
1672 bool clear_ads = false;
1673 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1674 mode_t new_unx_mode = (mode_t)0;
1675 mode_t unx_mode = (mode_t)0;
1676 int info;
1677 uint32 existing_dos_attributes = 0;
1678 struct timeval request_time = timeval_zero();
1679 struct share_mode_lock *lck = NULL;
1680 uint32 open_access_mask = access_mask;
1681 NTSTATUS status;
1682 char *parent_dir;
1683
1684 if (conn->printer) {
1685 /*
1686 * Printers are handled completely differently.
1687 * Most of the passed parameters are ignored.
1688 */
1689
1690 if (pinfo) {
1691 *pinfo = FILE_WAS_CREATED;
1692 }
1693
1694 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1695 smb_fname_str_dbg(smb_fname)));
1696
1697 if (!req) {
1698 DEBUG(0,("open_file_ntcreate: printer open without "
1699 "an SMB request!\n"));
1700 return NT_STATUS_INTERNAL_ERROR;
1701 }
1702
1703 return print_spool_open(fsp, smb_fname->base_name,
1704 req->vuid);
1705 }
1706
1707 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1708 NULL)) {
1709 return NT_STATUS_NO_MEMORY;
1710 }
1711
1712 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1713 posix_open = True;
1714 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1715 new_dos_attributes = 0;
1716 } else {
1717 /* Windows allows a new file to be created and
1718 silently removes a FILE_ATTRIBUTE_DIRECTORY
1719 sent by the client. Do the same. */
1720
1721 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1722
1723 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1724 * created new. */
1725 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1726 smb_fname, parent_dir);
1727 }
1728
1729 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1730 "access_mask=0x%x share_access=0x%x "
1731 "create_disposition = 0x%x create_options=0x%x "
1732 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1733 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1734 access_mask, share_access, create_disposition,
1735 create_options, (unsigned int)unx_mode, oplock_request,
1736 (unsigned int)private_flags));
1737
1738 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1739 DEBUG(0, ("No smb request but not an internal only open!\n"));
1740 return NT_STATUS_INTERNAL_ERROR;
1741 }
1742
1743 /*
1744 * Only non-internal opens can be deferred at all
1745 */
1746
1747 if (req) {
1748 void *ptr;
1749 if (get_deferred_open_message_state(req,
1750 &request_time,
1751 &ptr)) {
1752
1753 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1754 /* Remember the absolute time of the original
1755 request with this mid. We'll use it later to
1756 see if this has timed out. */
1757
1758 /* Remove the deferred open entry under lock. */
1759 remove_deferred_open_entry(
1760 state->id, req->mid,
1761 messaging_server_id(req->sconn->msg_ctx));
1762
1763 /* Ensure we don't reprocess this message. */
1764 remove_deferred_open_message_smb(req->sconn, req->mid);
1765 }
1766 }
1767
1768 if (!posix_open) {
1769 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1770 if (file_existed) {
1771 existing_dos_attributes = dos_mode(conn, smb_fname);
1772 }
1773 }
1774
1775 /* ignore any oplock requests if oplocks are disabled */
1776 if (!lp_oplocks(SNUM(conn)) ||
1777 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1778 /* Mask off everything except the private Samba bits. */
1779 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1780 }
1781
1782 /* this is for OS/2 long file names - say we don't support them */
1783 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1784 /* OS/2 Workplace shell fix may be main code stream in a later
1785 * release. */
1786 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1787 "supported.\n"));
1788 if (use_nt_status()) {
1789 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1790 }
1791 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1792 }
1793
1794 switch( create_disposition ) {
1795 /*
1796 * Currently we're using FILE_SUPERSEDE as the same as
1797 * FILE_OVERWRITE_IF but they really are
1798 * different. FILE_SUPERSEDE deletes an existing file
1799 * (requiring delete access) then recreates it.
1800 */
1801 case FILE_SUPERSEDE:
1802 /* If file exists replace/overwrite. If file doesn't
1803 * exist create. */
1804 flags2 |= (O_CREAT | O_TRUNC);
1805 clear_ads = true;
1806 break;
1807
1808 case FILE_OVERWRITE_IF:
1809 /* If file exists replace/overwrite. If file doesn't
1810 * exist create. */
1811 flags2 |= (O_CREAT | O_TRUNC);
1812 clear_ads = true;
1813 break;
1814
1815 case FILE_OPEN:
1816 /* If file exists open. If file doesn't exist error. */
1817 if (!file_existed) {
1818 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1819 "requested for file %s and file "
1820 "doesn't exist.\n",
1821 smb_fname_str_dbg(smb_fname)));
1822 errno = ENOENT;
1823 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1824 }
1825 break;
1826
1827 case FILE_OVERWRITE:
1828 /* If file exists overwrite. If file doesn't exist
1829 * error. */
1830 if (!file_existed) {
1831 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1832 "requested for file %s and file "
1833 "doesn't exist.\n",
1834 smb_fname_str_dbg(smb_fname) ));
1835 errno = ENOENT;
1836 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1837 }
1838 flags2 |= O_TRUNC;
1839 clear_ads = true;
1840 break;
1841
1842 case FILE_CREATE:
1843 /* If file exists error. If file doesn't exist
1844 * create. */
1845 if (file_existed) {
1846 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1847 "requested for file %s and file "
1848 "already exists.\n",
1849 smb_fname_str_dbg(smb_fname)));
1850 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1851 errno = EISDIR;
1852 } else {
1853 errno = EEXIST;
1854 }
1855 return map_nt_error_from_unix(errno);
1856 }
1857 flags2 |= (O_CREAT|O_EXCL);
1858 break;
1859
1860 case FILE_OPEN_IF:
1861 /* If file exists open. If file doesn't exist
1862 * create. */
1863 flags2 |= O_CREAT;
1864 break;
1865
1866 default:
1867 return NT_STATUS_INVALID_PARAMETER;
1868 }
1869
1870 /* We only care about matching attributes on file exists and
1871 * overwrite. */
1872
1873 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1874 (create_disposition == FILE_OVERWRITE_IF))) {
1875 if (!open_match_attributes(conn, existing_dos_attributes,
1876 new_dos_attributes,
1877 smb_fname->st.st_ex_mode,
1878 unx_mode, &new_unx_mode)) {
1879 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1880 "for file %s (%x %x) (0%o, 0%o)\n",
1881 smb_fname_str_dbg(smb_fname),
1882 existing_dos_attributes,
1883 new_dos_attributes,
1884 (unsigned int)smb_fname->st.st_ex_mode,
1885 (unsigned int)unx_mode ));
1886 errno = EACCES;
1887 return NT_STATUS_ACCESS_DENIED;
1888 }
1889 }
1890
1891 status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1892 access_mask,
1893 &access_mask);
1894 if (!NT_STATUS_IS_OK(status)) {
1895 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1896 "on file %s returned %s\n",
1897 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1898 return status;
1899 }
1900
1901 open_access_mask = access_mask;
1902
1903 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1904 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1905 }
1906
1907 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1908 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1909 access_mask));
1910
1911 /*
1912 * Note that we ignore the append flag as append does not
1913 * mean the same thing under DOS and Unix.
1914 */
1915
1916 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1917 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1918 /* DENY_DOS opens are always underlying read-write on the
1919 file handle, no matter what the requested access mask
1920 says. */
1921 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1922 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1923 flags = O_RDWR;
1924 } else {
1925 flags = O_WRONLY;
1926 }
1927 } else {
1928 flags = O_RDONLY;
1929 }
1930
1931 /*
1932 * Currently we only look at FILE_WRITE_THROUGH for create options.
1933 */
1934
1935 #if defined(O_SYNC)
1936 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1937 flags2 |= O_SYNC;
1938 }
1939 #endif /* O_SYNC */
1940
1941 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1942 flags2 |= O_APPEND;
1943 }
1944
1945 if (!posix_open && !CAN_WRITE(conn)) {
1946 /*
1947 * We should really return a permission denied error if either
1948 * O_CREAT or O_TRUNC are set, but for compatibility with
1949 * older versions of Samba we just AND them out.
1950 */
1951 flags2 &= ~(O_CREAT|O_TRUNC);
1952 }
1953
1954 /*
1955 * Ensure we can't write on a read-only share or file.
1956 */
1957
1958 if (flags != O_RDONLY && file_existed &&
1959 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1960 DEBUG(5,("open_file_ntcreate: write access requested for "
1961 "file %s on read only %s\n",
1962 smb_fname_str_dbg(smb_fname),
1963 !CAN_WRITE(conn) ? "share" : "file" ));
1964 errno = EACCES;
1965 return NT_STATUS_ACCESS_DENIED;
1966 }
1967
1968 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1969 fsp->share_access = share_access;
1970 fsp->fh->private_options = private_flags;
1971 fsp->access_mask = open_access_mask; /* We change this to the
1972 * requested access_mask after
1973 * the open is done. */
1974 fsp->posix_open = posix_open;
1975
1976 /* Ensure no SAMBA_PRIVATE bits can be set. */
1977 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1978
1979 if (timeval_is_zero(&request_time)) {
1980 request_time = fsp->open_time;
1981 }
1982
1983 if (file_existed) {
1984 struct byte_range_lock *br_lck = NULL;
1985 struct share_mode_entry *batch_entry = NULL;
1986 struct share_mode_entry *exclusive_entry = NULL;
1987 bool got_level2_oplock = false;
1988 bool got_a_none_oplock = false;
1989 struct file_id id;
1990
1991 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1992 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1993
1994 if (!acquire_ordered_locks(talloc_tos(),
1995 fsp,
1996 id,
1997 conn->connectpath,
1998 smb_fname,
1999 &old_write_time,
2000 &lck,
2001 &br_lck)) {
2002 return NT_STATUS_SHARING_VIOLATION;
2003 }
2004
2005 /* Get the types we need to examine. */
2006 find_oplock_types(fsp,
2007 oplock_request,
2008 lck,
2009 &batch_entry,
2010 &exclusive_entry,
2011 &got_level2_oplock,
2012 &got_a_none_oplock);
2013
2014 /* First pass - send break only on batch oplocks. */
2015 if ((req != NULL) &&
2016 delay_for_batch_oplocks(fsp,
2017 req->mid,
2018 oplock_request,
2019 batch_entry)) {
2020 schedule_defer_open(lck, request_time, req);
2021 TALLOC_FREE(lck);
2022 return NT_STATUS_SHARING_VIOLATION;
2023 }
2024
2025 /* Use the client requested access mask here, not the one we
2026 * open with. */
2027 status = open_mode_check(conn, lck, fsp->name_hash,
2028 access_mask, share_access,
2029 create_options, &file_existed);
2030
2031 if (NT_STATUS_IS_OK(status)) {
2032 /* We might be going to allow this open. Check oplock
2033 * status again. */
2034 /* Second pass - send break for both batch or
2035 * exclusive oplocks. */
2036 if ((req != NULL) &&
2037 delay_for_exclusive_oplocks(
2038 fsp,
2039 req->mid,
2040 oplock_request,
2041 exclusive_entry)) {
2042 schedule_defer_open(lck, request_time, req);
2043 TALLOC_FREE(lck);
2044 return NT_STATUS_SHARING_VIOLATION;
2045 }
2046 }
2047
2048 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2049 /* DELETE_PENDING is not deferred for a second */
2050 TALLOC_FREE(lck);
2051 return status;
2052 }
2053
2054 grant_fsp_oplock_type(fsp,
2055 br_lck,
2056 oplock_request,
2057 got_level2_oplock,
2058 got_a_none_oplock);
2059
2060 if (!NT_STATUS_IS_OK(status)) {
2061 uint32 can_access_mask;
2062 bool can_access = True;
2063
2064 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2065
2066 /* Check if this can be done with the deny_dos and fcb
2067 * calls. */
2068 if (private_flags &
2069 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2070 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2071 if (req == NULL) {
2072 DEBUG(0, ("DOS open without an SMB "
2073 "request!\n"));
2074 TALLOC_FREE(lck);
2075 return NT_STATUS_INTERNAL_ERROR;
2076 }
2077
2078 /* Use the client requested access mask here,
2079 * not the one we open with. */
2080 status = fcb_or_dos_open(req,
2081 conn,
2082 fsp,
2083 smb_fname,
2084 id,
2085 req->smbpid,
2086 req->vuid,
2087 access_mask,
2088 share_access,
2089 create_options);
2090
2091 if (NT_STATUS_IS_OK(status)) {
2092 TALLOC_FREE(lck);
2093 if (pinfo) {
2094 *pinfo = FILE_WAS_OPENED;
2095 }
2096 return NT_STATUS_OK;
2097 }
2098 }
2099
2100 /*
2101 * This next line is a subtlety we need for
2102 * MS-Access. If a file open will fail due to share
2103 * permissions and also for security (access) reasons,
2104 * we need to return the access failed error, not the
2105 * share error. We can't open the file due to kernel
2106 * oplock deadlock (it's possible we failed above on
2107 * the open_mode_check()) so use a userspace check.
2108 */
2109
2110 if (flags & O_RDWR) {
2111 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2112 } else if (flags & O_WRONLY) {
2113 can_access_mask = FILE_WRITE_DATA;
2114 } else {
2115 can_access_mask = FILE_READ_DATA;
2116 }
2117
2118 if (((can_access_mask & FILE_WRITE_DATA) &&
2119 !CAN_WRITE(conn)) ||
2120 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2121 smb_fname, can_access_mask))) {
2122 can_access = False;
2123 }
2124
2125 /*
2126 * If we're returning a share violation, ensure we
2127 * cope with the braindead 1 second delay.
2128 */
2129
2130 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2131 lp_defer_sharing_violations()) {
2132 struct timeval timeout;
2133 struct deferred_open_record state;
2134 int timeout_usecs;
2135
2136 /* this is a hack to speed up torture tests
2137 in 'make test' */
2138 timeout_usecs = lp_parm_int(SNUM(conn),
2139 "smbd","sharedelay",
2140 SHARING_VIOLATION_USEC_WAIT);
2141
2142 /* This is a relative time, added to the absolute
2143 request_time value to get the absolute timeout time.
2144 Note that if this is the second or greater time we enter
2145 this codepath for this particular request mid then
2146 request_time is left as the absolute time of the *first*
2147 time this request mid was processed. This is what allows
2148 the request to eventually time out. */
2149
2150 timeout = timeval_set(0, timeout_usecs);
2151
2152 /* Nothing actually uses state.delayed_for_oplocks
2153 but it's handy to differentiate in debug messages
2154 between a 30 second delay due to oplock break, and
2155 a 1 second delay for share mode conflicts. */
2156
2157 state.delayed_for_oplocks = False;
2158 state.id = id;
2159
2160 if ((req != NULL)
2161 && !request_timed_out(request_time,
2162 timeout)) {
2163 defer_open(lck, request_time, timeout,
2164 req, &state);
2165 }
2166 }
2167
2168 TALLOC_FREE(lck);
2169 if (can_access) {
2170 /*
2171 * We have detected a sharing violation here
2172 * so return the correct error code
2173 */
2174 status = NT_STATUS_SHARING_VIOLATION;
2175 } else {
2176 status = NT_STATUS_ACCESS_DENIED;
2177 }
2178 return status;
2179 }
2180
2181 /*
2182 * We exit this block with the share entry *locked*.....
2183 */
2184 }
2185
2186 SMB_ASSERT(!file_existed || (lck != NULL));
2187
2188 /*
2189 * Ensure we pay attention to default ACLs on directories if required.
2190 */
2191
2192 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2193 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2194 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2195 }
2196
2197 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2198 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2199 (unsigned int)flags, (unsigned int)flags2,
2200 (unsigned int)unx_mode, (unsigned int)access_mask,
2201 (unsigned int)open_access_mask));
2202
2203 /*
2204 * open_file strips any O_TRUNC flags itself.
2205 */
2206
2207 fsp_open = open_file(fsp, conn, req, parent_dir,
2208 flags|flags2, unx_mode, access_mask,
2209 open_access_mask);
2210
2211 if (!NT_STATUS_IS_OK(fsp_open)) {
2212 TALLOC_FREE(lck);
2213 return fsp_open;
2214 }
2215
2216 if (!file_existed) {
2217 struct byte_range_lock *br_lck = NULL;
2218 struct share_mode_entry *batch_entry = NULL;
2219 struct share_mode_entry *exclusive_entry = NULL;
2220 bool got_level2_oplock = false;
2221 bool got_a_none_oplock = false;
2222 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2223 struct file_id id;
2224 /*
2225 * Deal with the race condition where two smbd's detect the
2226 * file doesn't exist and do the create at the same time. One
2227 * of them will win and set a share mode, the other (ie. this
2228 * one) should check if the requested share mode for this
2229 * create is allowed.
2230 */
2231
2232 /*
2233 * Now the file exists and fsp is successfully opened,
2234 * fsp->dev and fsp->inode are valid and should replace the
2235 * dev=0,inode=0 from a non existent file. Spotted by
2236 * Nadav Danieli <nadavd@exanet.com>. JRA.
2237 */
2238
2239 id = fsp->file_id;
2240
2241 if (!acquire_ordered_locks(talloc_tos(),
2242 fsp,
2243 id,
2244 conn->connectpath,
2245 smb_fname,
2246 &old_write_time,
2247 &lck,
2248 &br_lck)) {
2249 return NT_STATUS_SHARING_VIOLATION;
2250 }
2251
2252 /* Get the types we need to examine. */
2253 find_oplock_types(fsp,
2254 oplock_request,
2255 lck,
2256 &batch_entry,
2257 &exclusive_entry,
2258 &got_level2_oplock,
2259 &got_a_none_oplock);
2260
2261 /* First pass - send break only on batch oplocks. */
2262 if ((req != NULL) &&
2263 delay_for_batch_oplocks(fsp,
2264 req->mid,
2265 oplock_request,
2266 batch_entry)) {
2267 schedule_defer_open(lck, request_time, req);
2268 TALLOC_FREE(lck);
2269 fd_close(fsp);
2270 return NT_STATUS_SHARING_VIOLATION;
2271 }
2272
2273 status = open_mode_check(conn, lck, fsp->name_hash,
2274 access_mask, share_access,
2275 create_options, &file_existed);
2276
2277 if (NT_STATUS_IS_OK(status)) {
2278 /* We might be going to allow this open. Check oplock
2279 * status again. */
2280 /* Second pass - send break for both batch or
2281 * exclusive oplocks. */
2282 if ((req != NULL) &&
2283 delay_for_exclusive_oplocks(
2284 fsp,
2285 req->mid,
2286 oplock_request,
2287 exclusive_entry)) {
2288 schedule_defer_open(lck, request_time, req);
2289 TALLOC_FREE(lck);
2290 fd_close(fsp);
2291 return NT_STATUS_SHARING_VIOLATION;
2292 }
2293 }
2294
2295 if (!NT_STATUS_IS_OK(status)) {
2296 struct deferred_open_record state;
2297
2298 state.delayed_for_oplocks = False;
2299 state.id = id;
2300
2301 /* Do it all over again immediately. In the second
2302 * round we will find that the file existed and handle
2303 * the DELETE_PENDING and FCB cases correctly. No need
2304 * to duplicate the code here. Essentially this is a
2305 * "goto top of this function", but don't tell
2306 * anybody... */
2307
2308 if (req != NULL) {
2309 defer_open(lck, request_time, timeval_zero(),
2310 req, &state);
2311 }
2312 TALLOC_FREE(lck);
2313 fd_close(fsp);
2314 return status;
2315 }
2316
2317 grant_fsp_oplock_type(fsp,
2318 br_lck,
2319 oplock_request,
2320 got_level2_oplock,
2321 got_a_none_oplock);
2322
2323 /*
2324 * We exit this block with the share entry *locked*.....
2325 */
2326
2327 }
2328
2329 SMB_ASSERT(lck != NULL);
2330
2331 /* Delete streams if create_disposition requires it */
2332 if (file_existed && clear_ads &&
2333 !is_ntfs_stream_smb_fname(smb_fname)) {
2334 status = delete_all_streams(conn, smb_fname->base_name);
2335 if (!NT_STATUS_IS_OK(status)) {
2336 TALLOC_FREE(lck);
2337 fd_close(fsp);
2338 return status;
2339 }
2340 }
2341
2342 /* note that we ignore failure for the following. It is
2343 basically a hack for NFS, and NFS will never set one of
2344 these only read them. Nobody but Samba can ever set a deny
2345 mode and we have already checked our more authoritative
2346 locking database for permission to set this deny mode. If
2347 the kernel refuses the operations then the kernel is wrong.
2348 note that GPFS supports it as well - jmcd */
2349
2350 if (fsp->fh->fd != -1) {
2351 int ret_flock;
2352 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2353 if(ret_flock == -1 ){
2354
2355 TALLOC_FREE(lck);
2356 fd_close(fsp);
2357
2358 return NT_STATUS_SHARING_VIOLATION;
2359 }
2360 }
2361
2362 /*
2363 * At this point onwards, we can guarentee that the share entry
2364 * is locked, whether we created the file or not, and that the
2365 * deny mode is compatible with all current opens.
2366 */
2367
2368 /*
2369 * If requested, truncate the file.
2370 */
2371
2372 if (file_existed && (flags2&O_TRUNC)) {
2373 /*
2374 * We are modifing the file after open - update the stat
2375 * struct..
2376 */
2377 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2378 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2379 status = map_nt_error_from_unix(errno);
2380 TALLOC_FREE(lck);
2381 fd_close(fsp);
2382 return status;
2383 }
2384 }
2385
2386 /*
2387 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2388 * but we don't have to store this - just ignore it on access check.
2389 */
2390 if (conn->sconn->using_smb2) {
2391 /*
2392 * SMB2 doesn't return it (according to Microsoft tests).
2393 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2394 * File created with access = 0x7 (Read, Write, Delete)
2395 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2396 */
2397 fsp->access_mask = access_mask;
2398 } else {
2399 /* But SMB1 does. */
2400 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2401 }
2402
2403 if (file_existed) {
2404 /* stat opens on existing files don't get oplocks. */
2405 if (is_stat_open(open_access_mask)) {
2406 fsp->oplock_type = NO_OPLOCK;
2407 }
2408
2409 if (flags2 & O_TRUNC) {
2410 info = FILE_WAS_OVERWRITTEN;
2411 } else {
2412 info = FILE_WAS_OPENED;
2413 }
2414 } else {
2415 info = FILE_WAS_CREATED;
2416 }
2417
2418 if (pinfo) {
2419 *pinfo = info;
2420 }
2421
2422 /*
2423 * Setup the oplock info in both the shared memory and
2424 * file structs.
2425 */
2426
2427 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2428 /*
2429 * Could not get the kernel oplock or there are byte-range
2430 * locks on the file.
2431 */
2432 fsp->oplock_type = NO_OPLOCK;
2433 }
2434
2435 set_share_mode(lck, fsp, get_current_uid(conn),
2436 req ? req->mid : 0,
2437 fsp->oplock_type);
2438
2439 /* Handle strange delete on close create semantics. */
2440 if (create_options & FILE_DELETE_ON_CLOSE) {
2441
2442 status = can_set_delete_on_close(fsp, new_dos_attributes);
2443
2444 if (!NT_STATUS_IS_OK(status)) {
2445 /* Remember to delete the mode we just added. */
2446 del_share_mode(lck, fsp);
2447 TALLOC_FREE(lck);
2448 fd_close(fsp);
2449 return status;
2450 }
2451 /* Note that here we set the *inital* delete on close flag,
2452 not the regular one. The magic gets handled in close. */
2453 fsp->initial_delete_on_close = True;
2454 }
2455
2456 if (info == FILE_WAS_OVERWRITTEN
2457 || info == FILE_WAS_CREATED
2458 || info == FILE_WAS_SUPERSEDED) {
2459 new_file_created = True;
2460 }
2461
2462 if (new_file_created) {
2463 /* Files should be initially set as archive */
2464 if (lp_map_archive(SNUM(conn)) ||
2465 lp_store_dos_attributes(SNUM(conn))) {
2466 if (!posix_open) {
2467 if (file_set_dosmode(conn, smb_fname,
2468 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2469 parent_dir, true) == 0) {
2470 unx_mode = smb_fname->st.st_ex_mode;
2471 }
2472 }
2473 }
2474 }
2475
2476 /* Determine sparse flag. */
2477 if (posix_open) {
2478 /* POSIX opens are sparse by default. */
2479 fsp->is_sparse = true;
2480 } else {
2481 fsp->is_sparse = (file_existed &&
2482 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2483 }
2484
2485 /*
2486 * Take care of inherited ACLs on created files - if default ACL not
2487 * selected.
2488 */
2489
2490 if (!posix_open && !file_existed && !def_acl) {
2491
2492 int saved_errno = errno; /* We might get ENOSYS in the next
2493 * call.. */
2494
2495 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2496 errno == ENOSYS) {
2497 errno = saved_errno; /* Ignore ENOSYS */
2498 }
2499
2500 } else if (new_unx_mode) {
2501
2502 int ret = -1;
2503
2504 /* Attributes need changing. File already existed. */
2505
2506 {
2507 int saved_errno = errno; /* We might get ENOSYS in the
2508 * next call.. */
2509 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2510
2511 if (ret == -1 && errno == ENOSYS) {
2512 errno = saved_errno; /* Ignore ENOSYS */
2513 } else {
2514 DEBUG(5, ("open_file_ntcreate: reset "
2515 "attributes of file %s to 0%o\n",
2516 smb_fname_str_dbg(smb_fname),
2517 (unsigned int)new_unx_mode));
2518 ret = 0; /* Don't do the fchmod below. */
2519 }
2520 }
2521
2522 if ((ret == -1) &&
2523 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2524 DEBUG(5, ("open_file_ntcreate: failed to reset "
2525 "attributes of file %s to 0%o\n",
2526 smb_fname_str_dbg(smb_fname),
2527 (unsigned int)new_unx_mode));
2528 }
2529
2530 /* If this is a successful open, we must remove any deferred open
2531 * records. */
2532 if (req != NULL) {
2533 del_deferred_open_entry(lck, req->mid,
2534 messaging_server_id(req->sconn->msg_ctx));
2535 }
2536 TALLOC_FREE(lck);
2537
2538 return NT_STATUS_OK;
2539 }
2540
2541
2542 /****************************************************************************
2543 Open a file for for write to ensure that we can fchmod it.
2544 ****************************************************************************/
2545
2546 NTSTATUS open_file_fchmod(connection_struct *conn,
2547 struct smb_filename *smb_fname,
2548 files_struct **result)
2549 {
2550 if (!VALID_STAT(smb_fname->st)) {
2551 return NT_STATUS_INVALID_PARAMETER;
2552 }
2553
2554 return SMB_VFS_CREATE_FILE(
2555 conn, /* conn */
2556 NULL, /* req */
2557 0, /* root_dir_fid */
2558 smb_fname, /* fname */
2559 FILE_WRITE_DATA, /* access_mask */
2560 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2561 FILE_SHARE_DELETE),
2562 FILE_OPEN, /* create_disposition*/
2563 0, /* create_options */
2564 0, /* file_attributes */
2565 INTERNAL_OPEN_ONLY, /* oplock_request */
2566 0, /* allocation_size */
2567 0, /* private_flags */
2568 NULL, /* sd */
2569 NULL, /* ea_list */
2570 result, /* result */
2571 NULL); /* pinfo */
2572 }
2573
2574 static NTSTATUS mkdir_internal(connection_struct *conn,
2575 struct smb_filename *smb_dname,
2576 uint32 file_attributes)
2577 {
2578 mode_t mode;
2579 char *parent_dir = NULL;
2580 NTSTATUS status;
2581 bool posix_open = false;
2582 bool need_re_stat = false;
2583 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2584
2585 if(access_mask & ~(conn->share_access)) {
2586 DEBUG(5,("mkdir_internal: failing share access "
2587 "%s\n", lp_servicename(SNUM(conn))));
2588 return NT_STATUS_ACCESS_DENIED;
2589 }
2590
2591 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2592 NULL)) {
2593 return NT_STATUS_NO_MEMORY;
2594 }
2595
2596 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2597 posix_open = true;
2598 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2599 } else {
2600 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2601 }
2602
2603 status = check_parent_access(conn,
2604 smb_dname,
2605 access_mask,
2606 &parent_dir);
2607 if(!NT_STATUS_IS_OK(status)) {
2608 DEBUG(5,("mkdir_internal: check_parent_access "
2609 "on directory %s for path %s returned %s\n",
2610 parent_dir,
2611 smb_dname->base_name,
2612 nt_errstr(status) ));
2613 return status;
2614 }
2615
2616 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2617 return map_nt_error_from_unix(errno);
2618 }
2619
2620 /* Ensure we're checking for a symlink here.... */
2621 /* We don't want to get caught by a symlink racer. */
2622
2623 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2624 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2625 smb_fname_str_dbg(smb_dname), strerror(errno)));
2626 return map_nt_error_from_unix(errno);
2627 }
2628
2629 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2630 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2631 smb_fname_str_dbg(smb_dname)));
2632 return NT_STATUS_NOT_A_DIRECTORY;
2633 }
2634
2635 if (lp_store_dos_attributes(SNUM(conn))) {
2636 if (!posix_open) {
2637 file_set_dosmode(conn, smb_dname,
2638 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2639 parent_dir, true);
2640 }
2641 }
2642
2643 if (lp_inherit_perms(SNUM(conn))) {
2644 inherit_access_posix_acl(conn, parent_dir,
2645 smb_dname->base_name, mode);
2646 need_re_stat = true;
2647 }
2648
2649 if (!posix_open) {
2650 /*
2651 * Check if high bits should have been set,
2652 * then (if bits are missing): add them.
2653 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2654 * dir.
2655 */
2656 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2657 (mode & ~smb_dname->st.st_ex_mode)) {
2658 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2659 (smb_dname->st.st_ex_mode |
2660 (mode & ~smb_dname->st.st_ex_mode)));
2661 need_re_stat = true;
2662 }
2663 }
2664
2665 /* Change the owner if required. */
2666 if (lp_inherit_owner(SNUM(conn))) {
2667 change_dir_owner_to_parent(conn, parent_dir,
2668 smb_dname->base_name,
2669 &smb_dname->st);
2670 need_re_stat = true;
2671 }
2672
2673 if (need_re_stat) {
2674 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2675 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2676 smb_fname_str_dbg(smb_dname), strerror(errno)));
2677 return map_nt_error_from_unix(errno);
2678 }
2679 }
2680
2681 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2682 smb_dname->base_name);
2683
2684 return NT_STATUS_OK;
2685 }
2686
2687 /****************************************************************************
2688 Ensure we didn't get symlink raced on opening a directory.
2689 ****************************************************************************/
2690
2691 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2692 const SMB_STRUCT_STAT *sbuf2)
2693 {
2694 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2695 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2696 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2697 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2698 return false;
2699 }
2700 return true;
2701 }
2702
2703 /****************************************************************************
2704 Open a directory from an NT SMB call.
2705 ****************************************************************************/
2706
2707 static NTSTATUS open_directory(connection_struct *conn,
2708 struct smb_request *req,
2709 struct smb_filename *smb_dname,
2710 uint32 access_mask,
2711 uint32 share_access,
2712 uint32 create_disposition,
2713 uint32 create_options,
2714 uint32 file_attributes,
2715 int *pinfo,
2716 files_struct **result)
2717 {
2718 files_struct *fsp = NULL;
2719 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2720 struct share_mode_lock *lck = NULL;
2721 NTSTATUS status;
2722 struct timespec mtimespec;
2723 int info = 0;
2724
2725 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2726
2727 /* Ensure we have a directory attribute. */
2728 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2729
2730 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2731 "share_access = 0x%x create_options = 0x%x, "
2732 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2733 smb_fname_str_dbg(smb_dname),
2734 (unsigned int)access_mask,
2735 (unsigned int)share_access,
2736 (unsigned int)create_options,
2737 (unsigned int)create_disposition,
2738 (unsigned int)file_attributes));
2739
2740 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2741 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2742 is_ntfs_stream_smb_fname(smb_dname)) {
2743 DEBUG(2, ("open_directory: %s is a stream name!\n",
2744 smb_fname_str_dbg(smb_dname)));
2745 return NT_STATUS_NOT_A_DIRECTORY;
2746 }
2747
2748 status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2749 access_mask, &access_mask);
2750 if (!NT_STATUS_IS_OK(status)) {
2751 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2752 "on file %s returned %s\n",
2753 smb_fname_str_dbg(smb_dname),
2754 nt_errstr(status)));
2755 return status;
2756 }
2757
2758 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2759 !security_token_has_privilege(get_current_nttok(conn),
2760 SEC_PRIV_SECURITY)) {
2761 DEBUG(10, ("open_directory: open on %s "
2762 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2763 smb_fname_str_dbg(smb_dname)));
2764 return NT_STATUS_PRIVILEGE_NOT_HELD;
2765 }
2766
2767 switch( create_disposition ) {
2768 case FILE_OPEN:
2769
2770 if (!dir_existed) {
2771 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2772 }
2773
2774 info = FILE_WAS_OPENED;
2775 break;
2776
2777 case FILE_CREATE:
2778
2779 /* If directory exists error. If directory doesn't
2780 * exist create. */
2781
2782 if (dir_existed) {
2783 status = NT_STATUS_OBJECT_NAME_COLLISION;
2784 DEBUG(2, ("open_directory: unable to create "
2785 "%s. Error was %s\n",
2786 smb_fname_str_dbg(smb_dname),
2787 nt_errstr(status)));
2788 return status;
2789 }
2790
2791 status = mkdir_internal(conn, smb_dname,
2792 file_attributes);
2793
2794 if (!NT_STATUS_IS_OK(status)) {
2795 DEBUG(2, ("open_directory: unable to create "
2796 "%s. Error was %s\n",
2797 smb_fname_str_dbg(smb_dname),
2798 nt_errstr(status)));
2799 return status;
2800 }
2801
2802 info = FILE_WAS_CREATED;
2803 break;
2804
2805 case FILE_OPEN_IF:
2806 /*
2807 * If directory exists open. If directory doesn't
2808 * exist create.
2809 */
2810
2811 if (dir_existed) {
2812 status = NT_STATUS_OK;
2813 info = FILE_WAS_OPENED;
2814 } else {
2815 status = mkdir_internal(conn, smb_dname,
2816 file_attributes);
2817
2818 if (NT_STATUS_IS_OK(status)) {
2819 info = FILE_WAS_CREATED;
2820 } else {
2821 /* Cope with create race. */
2822 if (!NT_STATUS_EQUAL(status,
2823 NT_STATUS_OBJECT_NAME_COLLISION)) {
2824 DEBUG(2, ("open_directory: unable to create "
2825 "%s. Error was %s\n",
2826 smb_fname_str_dbg(smb_dname),
2827 nt_errstr(status)));
2828 return status;
2829 }
2830 info = FILE_WAS_OPENED;
2831 }
2832 }
2833
2834 break;
2835
2836 case FILE_SUPERSEDE:
2837 case FILE_OVERWRITE:
2838 case FILE_OVERWRITE_IF:
2839 default:
2840 DEBUG(5,("open_directory: invalid create_disposition "
2841 "0x%x for directory %s\n",
2842 (unsigned int)create_disposition,
2843 smb_fname_str_dbg(smb_dname)));
2844 return NT_STATUS_INVALID_PARAMETER;
2845 }
2846
2847 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2848 DEBUG(5,("open_directory: %s is not a directory !\n",
2849 smb_fname_str_dbg(smb_dname)));
2850 return NT_STATUS_NOT_A_DIRECTORY;
2851 }
2852
2853 if (info == FILE_WAS_OPENED) {
2854 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2855 if (!NT_STATUS_IS_OK(status)) {
2856 DEBUG(10, ("open_directory: smbd_check_access_rights on "
2857 "file %s failed with %s\n",
2858 smb_fname_str_dbg(smb_dname),
2859 nt_errstr(status)));
2860 return status;
2861 }
2862 }
2863
2864 status = file_new(req, conn, &fsp);
2865 if(!NT_STATUS_IS_OK(status)) {
2866 return status;
2867 }
2868
2869 /*
2870 * Setup the files_struct for it.
2871 */
2872
2873 fsp->mode = smb_dname->st.st_ex_mode;
2874 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2875 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2876 fsp->file_pid = req ? req->smbpid : 0;
2877 fsp->can_lock = False;
2878 fsp->can_read = False;
2879 fsp->can_write = False;
2880
2881 fsp->share_access = share_access;
2882 fsp->fh->private_options = 0;
2883 /*
2884 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2885 */
2886 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2887 fsp->print_file = NULL;
2888 fsp->modified = False;
2889 fsp->oplock_type = NO_OPLOCK;
2890 fsp->sent_oplock_break = NO_BREAK_SENT;
2891 fsp->is_directory = True;
2892 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2893 status = fsp_set_smb_fname(fsp, smb_dname);
2894 if (!NT_STATUS_IS_OK(status)) {
2895 file_free(req, fsp);
2896 return status;
2897 }
2898
2899 mtimespec = smb_dname->st.st_ex_mtime;
2900
2901 #ifdef O_DIRECTORY
2902 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2903 #else
2904 /* POSIX allows us to open a directory with O_RDONLY. */
2905 status = fd_open(conn, fsp, O_RDONLY, 0);
2906 #endif
2907 if (!NT_STATUS_IS_OK(status)) {
2908 DEBUG(5, ("open_directory: Could not open fd for "
2909 "%s (%s)\n",
2910 smb_fname_str_dbg(smb_dname),
2911 nt_errstr(status)));
2912 file_free(req, fsp);
2913 return status;
2914 }
2915
2916 status = vfs_stat_fsp(fsp);
2917 if (!NT_STATUS_IS_OK(status)) {
2918 fd_close(fsp);
2919 file_free(req, fsp);
2920 return status;
2921 }
2922
2923 /* Ensure there was no race condition. */
2924 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2925 DEBUG(5,("open_directory: stat struct differs for "
2926 "directory %s.\n",
2927 smb_fname_str_dbg(smb_dname)));
2928 fd_close(fsp);
2929 file_free(req, fsp);
2930 return NT_STATUS_ACCESS_DENIED;
2931 }
2932
2933 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2934 conn->connectpath, smb_dname, &mtimespec);
2935
2936 if (lck == NULL) {
2937 DEBUG(0, ("open_directory: Could not get share mode lock for "
2938 "%s\n", smb_fname_str_dbg(smb_dname)));
2939 fd_close(fsp);
2940 file_free(req, fsp);
2941 return NT_STATUS_SHARING_VIOLATION;
2942 }
2943
2944 status = open_mode_check(conn, lck, fsp->name_hash,
2945 access_mask, share_access,
2946 create_options, &dir_existed);
2947
2948 if (!NT_STATUS_IS_OK(status)) {
2949 TALLOC_FREE(lck);
2950 fd_close(fsp);
2951 file_free(req, fsp);
2952 return status;
2953 }
2954
2955 set_share_mode(lck, fsp, get_current_uid(conn),
2956 req ? req->mid : 0, NO_OPLOCK);
2957
2958 /* For directories the delete on close bit at open time seems
2959 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2960 if (create_options & FILE_DELETE_ON_CLOSE) {
2961 status = can_set_delete_on_close(fsp, 0);
2962 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2963 TALLOC_FREE(lck);
2964 fd_close(fsp);
2965 file_free(req, fsp);
2966 return status;
2967 }
2968
2969 if (NT_STATUS_IS_OK(status)) {
2970 /* Note that here we set the *inital* delete on close flag,
2971 not the regular one. The magic gets handled in close. */
2972 fsp->initial_delete_on_close = True;
2973 }
2974 }
2975
2976 TALLOC_FREE(lck);
2977
2978 if (pinfo) {
2979 *pinfo = info;
2980 }
2981
2982 *result = fsp;
2983 return NT_STATUS_OK;
2984 }
2985
2986 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2987 struct smb_filename *smb_dname)
2988 {
2989 NTSTATUS status;
2990 files_struct *fsp;
2991
2992 status = SMB_VFS_CREATE_FILE(
2993 conn, /* conn */
2994 req, /* req */
2995 0, /* root_dir_fid */
2996 smb_dname, /* fname */
2997 FILE_READ_ATTRIBUTES, /* access_mask */
2998 FILE_SHARE_NONE, /* share_access */
2999 FILE_CREATE, /* create_disposition*/
3000 FILE_DIRECTORY_FILE, /* create_options */
3001 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
3002 0, /* oplock_request */
3003 0, /* allocation_size */
3004 0, /* private_flags */
3005 NULL, /* sd */
3006 NULL, /* ea_list */
3007 &fsp, /* result */
3008 NULL); /* pinfo */
3009
3010 if (NT_STATUS_IS_OK(status)) {
3011 close_file(req, fsp, NORMAL_CLOSE);
3012 }
3013
3014 return status;
3015 }
3016
3017 /****************************************************************************
3018 Receive notification that one of our open files has been renamed by another
3019 smbd process.
3020 ****************************************************************************/
3021
3022 void msg_file_was_renamed(struct messaging_context *msg,
3023 void *private_data,
3024 uint32_t msg_type,
3025 struct server_id server_id,
3026 DATA_BLOB *data)
3027 {
3028 files_struct *fsp;
3029 char *frm = (char *)data->data;
3030 struct file_id id;
3031 const char *sharepath;
3032 const char *base_name;
3033 const char *stream_name;
3034 struct smb_filename *smb_fname = NULL;
3035 size_t sp_len, bn_len;
3036 NTSTATUS status;
3037 struct smbd_server_connection *sconn =
3038 talloc_get_type_abort(private_data,
3039 struct smbd_server_connection);
3040
3041 if (data->data == NULL
3042 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3043 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3044 (int)data->length));
3045 return;
3046 }
3047
3048 /* Unpack the message. */
3049 pull_file_id_24(frm, &id);
3050 sharepath = &frm[24];
3051 sp_len = strlen(sharepath);
3052 base_name = sharepath + sp_len + 1;
3053 bn_len = strlen(base_name);
3054 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3055
3056 /* stream_name must always be NULL if there is no stream. */
3057 if (stream_name[0] == '\0') {
3058 stream_name = NULL;
3059 }
3060
3061 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3062 stream_name, NULL, &smb_fname);
3063 if (!NT_STATUS_IS_OK(status)) {
3064 return;
3065 }
3066
3067 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3068 "file_id %s\n",
3069 sharepath, smb_fname_str_dbg(smb_fname),
3070 file_id_string_tos(&id)));
3071
3072 for(fsp = file_find_di_first(sconn, id); fsp;
3073 fsp = file_find_di_next(fsp)) {
3074 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3075
3076 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3077 fsp->fnum, fsp_str_dbg(fsp),
3078 smb_fname_str_dbg(smb_fname)));
3079 status = fsp_set_smb_fname(fsp, smb_fname);
3080 if (!NT_STATUS_IS_OK(status)) {
3081 goto out;
3082 }
3083 } else {
3084 /* TODO. JRA. */
3085 /* Now we have the complete path we can work out if this is
3086 actually within this share and adjust newname accordingly. */
3087 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3088 "not sharepath %s) "
3089 "fnum %d from %s -> %s\n",
3090 fsp->conn->connectpath,
3091 sharepath,
3092 fsp->fnum,
3093 fsp_str_dbg(fsp),
3094 smb_fname_str_dbg(smb_fname)));
3095 }
3096 }
3097 out:
3098 TALLOC_FREE(smb_fname);
3099 return;
3100 }
3101
3102 /*
3103 * If a main file is opened for delete, all streams need to be checked for
3104 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3105 * If that works, delete them all by setting the delete on close and close.
3106 */
3107
3108 NTSTATUS open_streams_for_delete(connection_struct *conn,
3109 const char *fname)
3110 {
3111 struct stream_struct *stream_info = NULL;
3112 files_struct **streams = NULL;
3113 int i;
3114 unsigned int num_streams = 0;
3115 TALLOC_CTX *frame = talloc_stackframe();
3116 NTSTATUS status;
3117
3118 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3119 &num_streams, &stream_info);
3120
3121 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3122 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3123 DEBUG(10, ("no streams around\n"));
3124 TALLOC_FREE(frame);
3125 return NT_STATUS_OK;
3126 }
3127
3128 if (!NT_STATUS_IS_OK(status)) {
3129 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3130 nt_errstr(status)));
3131 goto fail;
3132 }
3133
3134 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3135 num_streams));
3136
3137 if (num_streams == 0) {
3138 TALLOC_FREE(frame);
3139 return NT_STATUS_OK;
3140 }
3141
3142 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3143 if (streams == NULL) {
3144 DEBUG(0, ("talloc failed\n"));
3145 status = NT_STATUS_NO_MEMORY;
3146 goto fail;
3147 }
3148
3149 for (i=0; i<num_streams; i++) {
3150 struct smb_filename *smb_fname = NULL;
3151
3152 if (strequal(stream_info[i].name, "::$DATA")) {
3153 streams[i] = NULL;
3154 continue;
3155 }
3156
3157 status = create_synthetic_smb_fname(talloc_tos(), fname,
3158 stream_info[i].name,
3159 NULL, &smb_fname);
3160 if (!NT_STATUS_IS_OK(status)) {
3161 goto fail;
3162 }
3163
3164 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3165 DEBUG(10, ("Unable to stat stream: %s\n",
3166 smb_fname_str_dbg(smb_fname)));
3167 }
3168
3169 status = SMB_VFS_CREATE_FILE(
3170 conn, /* conn */
3171 NULL, /* req */
3172 0, /* root_dir_fid */
3173 smb_fname, /* fname */
3174 DELETE_ACCESS, /* access_mask */
3175 (FILE_SHARE_READ | /* share_access */
3176 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3177 FILE_OPEN, /* create_disposition*/
3178 0, /* create_options */
3179 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3180 0, /* oplock_request */
3181 0, /* allocation_size */
3182 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3183 NULL, /* sd */
3184 NULL, /* ea_list */
3185 &streams[i], /* result */
3186 NULL); /* pinfo */
3187
3188 if (!NT_STATUS_IS_OK(status)) {
3189 DEBUG(10, ("Could not open stream %s: %s\n",
3190 smb_fname_str_dbg(smb_fname),
3191 nt_errstr(status)));
3192
3193 TALLOC_FREE(smb_fname);
3194 break;
3195 }
3196 TALLOC_FREE(smb_fname);
3197 }
3198
3199 /*
3200 * don't touch the variable "status" beyond this point :-)
3201 */
3202
3203 for (i -= 1 ; i >= 0; i--) {
3204 if (streams[i] == NULL) {
3205 continue;
3206 }
3207
3208 DEBUG(10, ("Closing stream # %d, %s\n", i,
3209 fsp_str_dbg(streams[i])));
3210 close_file(NULL, streams[i], NORMAL_CLOSE);
3211 }
3212
3213 fail:
3214 TALLOC_FREE(frame);
3215 return status;
3216 }
3217
3218 /*********************************************************************
3219 Create a default ACL by inheriting from the parent. If no inheritance
3220 from the parent available, don't set anything. This will leave the actual
3221 permissions the new file or directory already got from the filesystem
3222 as the NT ACL when read.
3223 *********************************************************************/
3224
3225 static NTSTATUS inherit_new_acl(files_struct *fsp)
3226 {
3227 TALLOC_CTX *ctx = talloc_tos();
3228 char *parent_name = NULL;
3229 struct security_descriptor *parent_desc = NULL;
3230 NTSTATUS status = NT_STATUS_OK;
3231 struct security_descriptor *psd = NULL;
3232 struct dom_sid *owner_sid = NULL;
3233 struct dom_sid *group_sid = NULL;
3234 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3235 bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3236 bool inheritable_components = false;
3237 size_t size = 0;
3238
3239 if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3240 return NT_STATUS_NO_MEMORY;
3241 }
3242
3243 status = SMB_VFS_GET_NT_ACL(fsp->conn,
3244 parent_name,
3245 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3246 &parent_desc);
3247 if (!NT_STATUS_IS_OK(status)) {
3248 return status;
3249 }
3250
3251 inheritable_components = sd_has_inheritable_components(parent_desc,
3252 fsp->is_directory);
3253
3254 if (!inheritable_components && !inherit_owner) {
3255 /* Nothing to inherit and not setting owner. */
3256 return NT_STATUS_OK;
3257 }
3258
3259 /* Create an inherited descriptor from the parent. */
3260
3261 if (DEBUGLEVEL >= 10) {
3262 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3263 fsp_str_dbg(fsp) ));
3264 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3265 }
3266
3267 /* Inherit from parent descriptor if "inherit owner" set. */
3268 if (inherit_owner) {
3269 owner_sid = parent_desc->owner_sid;
3270 group_sid = parent_desc->group_sid;
3271 }
3272
3273 if (owner_sid == NULL) {
3274 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3275 }
3276 if (group_sid == NULL) {
3277 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3278 }
3279
3280 status = se_create_child_secdesc(ctx,
3281 &psd,
3282 &size,
3283 parent_desc,
3284 owner_sid,
3285 group_sid,
3286 fsp->is_directory);
3287 if (!NT_STATUS_IS_OK(status)) {
3288 return status;
3289 }
3290
3291 /* If inheritable_components == false,
3292 se_create_child_secdesc()
3293 creates a security desriptor with a NULL dacl
3294 entry, but with SEC_DESC_DACL_PRESENT. We need
3295 to remove that flag. */
3296
3297 if (!inheritable_components) {
3298 security_info_sent &= ~SECINFO_DACL;
3299 psd->type &= ~SEC_DESC_DACL_PRESENT;
3300 }
3301
3302 if (DEBUGLEVEL >= 10) {
3303 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3304 fsp_str_dbg(fsp) ));
3305 NDR_PRINT_DEBUG(security_descriptor, psd);
3306 }
3307
3308 if (inherit_owner) {
3309 /* We need to be root to force this. */
3310 become_root();
3311 }
3312 status = SMB_VFS_FSET_NT_ACL(fsp,
3313 security_info_sent,
3314 psd);
3315 if (inherit_owner) {
3316 unbecome_root();
3317 }
3318 return status;
3319 }
3320
3321 /*
3322 * Wrapper around open_file_ntcreate and open_directory
3323 */
3324
3325 static NTSTATUS create_file_unixpath(connection_struct *conn,
3326 struct smb_request *req,
3327 struct smb_filename *smb_fname,
3328 uint32_t access_mask,
3329 uint32_t share_access,
3330 uint32_t create_disposition,
3331 uint32_t create_options,
3332 uint32_t file_attributes,
3333 uint32_t oplock_request,
3334 uint64_t allocation_size,
3335 uint32_t private_flags,
3336 struct security_descriptor *sd,
3337 struct ea_list *ea_list,
3338
3339 files_struct **result,
3340 int *pinfo)
3341 {
3342 int info = FILE_WAS_OPENED;
3343 files_struct *base_fsp = NULL;
3344 files_struct *fsp = NULL;
3345 NTSTATUS status;
3346
3347 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3348 "file_attributes = 0x%x, share_access = 0x%x, "
3349 "create_disposition = 0x%x create_options = 0x%x "
3350 "oplock_request = 0x%x private_flags = 0x%x "
3351 "ea_list = 0x%p, sd = 0x%p, "
3352 "fname = %s\n",
3353 (unsigned int)access_mask,
3354 (unsigned int)file_attributes,
3355 (unsigned int)share_access,
3356 (unsigned int)create_disposition,
3357 (unsigned int)create_options,
3358 (unsigned int)oplock_request,
3359 (unsigned int)private_flags,
3360 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3361
3362 if (create_options & FILE_OPEN_BY_FILE_ID) {
3363 status = NT_STATUS_NOT_SUPPORTED;
3364 goto fail;
3365 }
3366
3367 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3368 status = NT_STATUS_INVALID_PARAMETER;
3369 goto fail;
3370 }
3371
3372 if (req == NULL) {
3373 oplock_request |= INTERNAL_OPEN_ONLY;
3374 }
3375
3376 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3377 && (access_mask & DELETE_ACCESS)
3378 && !is_ntfs_stream_smb_fname(smb_fname)) {
3379 /*
3380 * We can't open a file with DELETE access if any of the
3381 * streams is open without FILE_SHARE_DELETE
3382 */
3383 status = open_streams_for_delete(conn, smb_fname->base_name);
3384
3385 if (!NT_STATUS_IS_OK(status)) {
3386 goto fail;
3387 }
3388 }
3389
3390 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3391 !security_token_has_privilege(get_current_nttok(conn),
3392 SEC_PRIV_SECURITY)) {
3393 DEBUG(10, ("create_file_unixpath: open on %s "
3394 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3395 smb_fname_str_dbg(smb_fname)));
3396 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3397 goto fail;
3398 }
3399
3400 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3401 && is_ntfs_stream_smb_fname(smb_fname)
3402 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3403 uint32 base_create_disposition;
3404 struct smb_filename *smb_fname_base = NULL;
3405
3406 if (create_options & FILE_DIRECTORY_FILE) {
3407 status = NT_STATUS_NOT_A_DIRECTORY;
3408 goto fail;
3409 }
3410
3411 switch (create_disposition) {
3412 case FILE_OPEN:
3413 base_create_disposition = FILE_OPEN;
3414 break;
3415 default:
3416 base_create_disposition = FILE_OPEN_IF;
3417 break;
3418 }
3419
3420 /* Create an smb_filename with stream_name == NULL. */
3421 status = create_synthetic_smb_fname(talloc_tos(),
3422 smb_fname->base_name,
3423 NULL, NULL,
3424 &smb_fname_base);
3425 if (!NT_STATUS_IS_OK(status)) {
3426 goto fail;
3427 }
3428
3429 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3430 DEBUG(10, ("Unable to stat stream: %s\n",
3431 smb_fname_str_dbg(smb_fname_base)));
3432 }
3433
3434 /* Open the base file. */
3435 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3436 FILE_SHARE_READ
3437 | FILE_SHARE_WRITE
3438 | FILE_SHARE_DELETE,
3439 base_create_disposition,
3440 0, 0, 0, 0, 0, NULL, NULL,
3441 &base_fsp, NULL);
3442 TALLOC_FREE(smb_fname_base);
3443
3444 if (!NT_STATUS_IS_OK(status)) {
3445 DEBUG(10, ("create_file_unixpath for base %s failed: "
3446 "%s\n", smb_fname->base_name,
3447 nt_errstr(status)));
3448 goto fail;
3449 }
3450 /* we don't need to low level fd */
3451 fd_close(base_fsp);
3452 }
3453
3454 /*
3455 * If it's a request for a directory open, deal with it separately.
3456 */
3457
3458 if (create_options & FILE_DIRECTORY_FILE) {
3459
3460 if (create_options & FILE_NON_DIRECTORY_FILE) {
3461 status = NT_STATUS_INVALID_PARAMETER;
3462 goto fail;
3463 }
3464
3465 /* Can't open a temp directory. IFS kit test. */
3466 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3467 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3468 status = NT_STATUS_INVALID_PARAMETER;
3469 goto fail;
3470 }
3471
3472 /*
3473 * We will get a create directory here if the Win32
3474 * app specified a security descriptor in the
3475 * CreateDirectory() call.
3476 */
3477
3478 oplock_request = 0;
3479 status = open_directory(
3480 conn, req, smb_fname, access_mask, share_access,
3481 create_disposition, create_options, file_attributes,
3482 &info, &fsp);
3483 } else {
3484
3485 /*
3486 * Ordinary file case.
3487 */
3488
3489 status = file_new(req, conn, &fsp);
3490 if(!NT_STATUS_IS_OK(status)) {
3491 goto fail;
3492 }
3493
3494 status = fsp_set_smb_fname(fsp, smb_fname);
3495 if (!NT_STATUS_IS_OK(status)) {
3496 goto fail;
3497 }
3498
3499 /*
3500 * We're opening the stream element of a base_fsp
3501 * we already opened. Set up the base_fsp pointer.
3502 */
3503 if (base_fsp) {
3504 fsp->base_fsp = base_fsp;
3505 }
3506
3507 status = open_file_ntcreate(conn,
3508 req,
3509 access_mask,
3510 share_access,
3511 create_disposition,
3512 create_options,
3513 file_attributes,
3514 oplock_request,
3515 private_flags,
3516 &info,
3517 fsp);
3518
3519 if(!NT_STATUS_IS_OK(status)) {
3520 file_free(req, fsp);
3521 fsp = NULL;
3522 }
3523
3524 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3525
3526 /* A stream open never opens a directory */
3527
3528 if (base_fsp) {
3529 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3530 goto fail;
3531 }
3532
3533 /*
3534 * Fail the open if it was explicitly a non-directory
3535 * file.
3536 */
3537
3538 if (create_options & FILE_NON_DIRECTORY_FILE) {
3539 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3540 goto fail;
3541 }
3542
3543 oplock_request = 0;
3544 status = open_directory(
3545 conn, req, smb_fname, access_mask,
3546 share_access, create_disposition,
3547 create_options, file_attributes,
3548 &info, &fsp);
3549 }
3550 }
3551
3552 if (!NT_STATUS_IS_OK(status)) {
3553 goto fail;
3554 }
3555
3556 fsp->base_fsp = base_fsp;
3557
3558 if ((ea_list != NULL) &&
3559 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3560 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3561 if (!NT_STATUS_IS_OK(status)) {
3562 goto fail;
3563 }
3564 }
3565
3566 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3567 status = NT_STATUS_ACCESS_DENIED;
3568 goto fail;
3569 }
3570
3571 /* Save the requested allocation size. */
3572 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3573 if (allocation_size
3574 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3575 fsp->initial_allocation_size = smb_roundup(
3576 fsp->conn, allocation_size);
3577 if (fsp->is_directory) {
3578 /* Can't set allocation size on a directory. */
3579 status = NT_STATUS_ACCESS_DENIED;
3580 goto fail;
3581 }
3582 if (vfs_allocate_file_space(
3583 fsp, fsp->initial_allocation_size) == -1) {
3584 status = NT_STATUS_DISK_FULL;
3585 goto fail;
3586 }
3587 } else {
3588 fsp->initial_allocation_size = smb_roundup(
3589 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3590 }
3591 }
3592
3593 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3594 fsp->base_fsp == NULL) {
3595 if (sd != NULL) {
3596 /*
3597 * According to the MS documentation, the only time the security
3598 * descriptor is applied to the opened file is iff we *created* the
3599 * file; an existing file stays the same.
3600 *
3601 * Also, it seems (from observation) that you can open the file with
3602 * any access mask but you can still write the sd. We need to override
3603 * the granted access before we call set_sd
3604 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3605 */
3606
3607 uint32_t sec_info_sent;
3608 uint32_t saved_access_mask = fsp->access_mask;
3609
3610 sec_info_sent = get_sec_info(sd);
3611
3612 fsp->access_mask = FILE_GENERIC_ALL;
3613
3614 /* Convert all the generic bits. */
3615 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3616 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3617
3618 if (sec_info_sent & (SECINFO_OWNER|
3619 SECINFO_GROUP|
3620 SECINFO_DACL|
3621 SECINFO_SACL)) {
3622 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3623 }
3624
3625 fsp->access_mask = saved_access_mask;
3626
3627 if (!NT_STATUS_IS_OK(status)) {
3628 goto fail;
3629 }
3630 } else if (lp_inherit_acls(SNUM(conn))) {
3631 /* Inherit from parent. Errors here are not fatal. */
3632 status = inherit_new_acl(fsp);
3633 if (!NT_STATUS_IS_OK(status)) {
3634 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3635 fsp_str_dbg(fsp),
3636 nt_errstr(status) ));
3637 }
3638 }
3639 }
3640
3641 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3642
3643 *result = fsp;
3644 if (pinfo != NULL) {
3645 *pinfo = info;
3646 }
3647
3648 smb_fname->st = fsp->fsp_name->st;
3649
3650 return NT_STATUS_OK;
3651
3652 fail:
3653 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3654
3655 if (fsp != NULL) {
3656 if (base_fsp && fsp->base_fsp == base_fsp) {
3657 /*
3658 * The close_file below will close
3659 * fsp->base_fsp.
3660 */
3661 base_fsp = NULL;
3662 }
3663 close_file(req, fsp, ERROR_CLOSE);
3664 fsp = NULL;
3665 }
3666 if (base_fsp != NULL) {
3667 close_file(req, base_fsp, ERROR_CLOSE);
3668 base_fsp = NULL;
3669 }
3670 return status;
3671 }
3672
3673 /*
3674 * Calculate the full path name given a relative fid.
3675 */
3676 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3677 struct smb_request *req,
3678 uint16_t root_dir_fid,
3679 const struct smb_filename *smb_fname,
3680 struct smb_filename **smb_fname_out)
3681 {
3682 files_struct *dir_fsp;
3683 char *parent_fname = NULL;
3684 char *new_base_name = NULL;
3685 NTSTATUS status;
3686
3687 if (root_dir_fid == 0 || !smb_fname) {
3688 status = NT_STATUS_INTERNAL_ERROR;
3689 goto out;
3690 }
3691
3692 dir_fsp = file_fsp(req, root_dir_fid);
3693
3694 if (dir_fsp == NULL) {
3695 status = NT_STATUS_INVALID_HANDLE;
3696 goto out;
3697 }
3698
3699 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3700 status = NT_STATUS_INVALID_HANDLE;
3701 goto out;
3702 }
3703
3704 if (!dir_fsp->is_directory) {
3705
3706 /*
3707 * Check to see if this is a mac fork of some kind.
3708 */
3709
3710 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3711 is_ntfs_stream_smb_fname(smb_fname)) {
3712 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3713 goto out;
3714 }
3715
3716 /*
3717 we need to handle the case when we get a
3718 relative open relative to a file and the
3719 pathname is blank - this is a reopen!
3720 (hint from demyn plantenberg)
3721 */
3722
3723 status = NT_STATUS_INVALID_HANDLE;
3724 goto out;
3725 }
3726
3727 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3728 /*
3729 * We're at the toplevel dir, the final file name
3730 * must not contain ./, as this is filtered out
3731 * normally by srvstr_get_path and unix_convert
3732 * explicitly rejects paths containing ./.
3733 */
3734 parent_fname = talloc_strdup(talloc_tos(), "");
3735 if (parent_fname == NULL) {
3736 status = NT_STATUS_NO_MEMORY;
3737 goto out;
3738 }
3739 } else {
3740 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3741
3742 /*
3743 * Copy in the base directory name.
3744 */
3745
3746 parent_fname = talloc_array(talloc_tos(), char,
3747 dir_name_len+2);
3748 if (parent_fname == NULL) {
3749 status = NT_STATUS_NO_MEMORY;
3750 goto out;
3751 }
3752 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3753 dir_name_len+1);
3754
3755 /*
3756 * Ensure it ends in a '/'.
3757 * We used TALLOC_SIZE +2 to add space for the '/'.
3758 */
3759
3760 if(dir_name_len
3761 && (parent_fname[dir_name_len-1] != '\\')
3762 && (parent_fname[dir_name_len-1] != '/')) {
3763 parent_fname[dir_name_len] = '/';
3764 parent_fname[dir_name_len+1] = '\0';
3765 }
3766 }
3767
3768 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3769 smb_fname->base_name);
3770 if (new_base_name == NULL) {
3771 status = NT_STATUS_NO_MEMORY;
3772 goto out;
3773 }
3774
3775 status = filename_convert(req,
3776 conn,
3777 req->flags2 & FLAGS2_DFS_PATHNAMES,
3778 new_base_name,
3779 0,
3780 NULL,
3781 smb_fname_out);
3782 if (!NT_STATUS_IS_OK(status)) {
3783 goto out;
3784 }
3785
3786 out:
3787 TALLOC_FREE(parent_fname);
3788 TALLOC_FREE(new_base_name);
3789 return status;
3790 }
3791
3792 NTSTATUS create_file_default(connection_struct *conn,
3793 struct smb_request *req,
3794 uint16_t root_dir_fid,
3795 struct smb_filename *smb_fname,
3796 uint32_t access_mask,
3797 uint32_t share_access,
3798 uint32_t create_disposition,
3799 uint32_t create_options,
3800 uint32_t file_attributes,
3801 uint32_t oplock_request,
3802 uint64_t allocation_size,
3803 uint32_t private_flags,
3804 struct security_descriptor *sd,
3805 struct ea_list *ea_list,
3806 files_struct **result,
3807 int *pinfo)
3808 {
3809 int info = FILE_WAS_OPENED;
3810 files_struct *fsp = NULL;
3811 NTSTATUS status;
3812 bool stream_name = false;
3813
3814 DEBUG(10,("create_file: access_mask = 0x%x "
3815 "file_attributes = 0x%x, share_access = 0x%x, "
3816 "create_disposition = 0x%x create_options = 0x%x "
3817 "oplock_request = 0x%x "
3818 "private_flags = 0x%x "
3819 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3820 "fname = %s\n",
3821 (unsigned int)access_mask,
3822 (unsigned int)file_attributes,
3823 (unsigned int)share_access,
3824 (unsigned int)create_disposition,
3825 (unsigned int)create_options,
3826 (unsigned int)oplock_request,
3827 (unsigned int)private_flags,
3828 (unsigned int)root_dir_fid,
3829 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3830
3831 /*
3832 * Calculate the filename from the root_dir_if if necessary.
3833 */
3834
3835 if (root_dir_fid != 0) {
3836 struct smb_filename *smb_fname_out = NULL;
3837 status = get_relative_fid_filename(conn, req, root_dir_fid,
3838 smb_fname, &smb_fname_out);
3839 if (!NT_STATUS_IS_OK(status)) {
3840 goto fail;
3841 }
3842 smb_fname = smb_fname_out;
3843 }
3844
3845 /*
3846 * Check to see if this is a mac fork of some kind.
3847 */
3848
3849 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3850 if (stream_name) {
3851 enum FAKE_FILE_TYPE fake_file_type;
3852
3853 fake_file_type = is_fake_file(smb_fname);
3854
3855 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3856
3857 /*
3858 * Here we go! support for changing the disk quotas
3859 * --metze
3860 *
3861 * We need to fake up to open this MAGIC QUOTA file
3862 * and return a valid FID.
3863 *
3864 * w2k close this file directly after openening xp
3865 * also tries a QUERY_FILE_INFO on the file and then
3866 * close it
3867 */
3868 status = open_fake_file(req, conn, req->vuid,
3869 fake_file_type, smb_fname,
3870 access_mask, &fsp);
3871 if (!NT_STATUS_IS_OK(status)) {
3872 goto fail;
3873 }
3874
3875 ZERO_STRUCT(smb_fname->st);
3876 goto done;
3877 }
3878
3879 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3880 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3881 goto fail;
3882 }
3883 }
3884
3885 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3886 int ret;
3887 smb_fname->stream_name = NULL;
3888 /* We have to handle this error here. */
3889 if (create_options & FILE_DIRECTORY_FILE) {
3890 status = NT_STATUS_NOT_A_DIRECTORY;
3891 goto fail;
3892 }
3893 if (lp_posix_pathnames()) {
3894 ret = SMB_VFS_LSTAT(conn, smb_fname);
3895 } else {
3896 ret = SMB_VFS_STAT(conn, smb_fname);
3897 }
3898
3899 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3900 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3901 goto fail;
3902 }
3903 }
3904
3905 status = create_file_unixpath(
3906 conn, req, smb_fname, access_mask, share_access,
3907 create_disposition, create_options, file_attributes,
3908 oplock_request, allocation_size, private_flags,
3909 sd, ea_list,
3910 &fsp, &info);
3911
3912 if (!NT_STATUS_IS_OK(status)) {
3913 goto fail;
3914 }
3915
3916 done:
3917 DEBUG(10, ("create_file: info=%d\n", info));
3918
3919 *result = fsp;
3920 if (pinfo != NULL) {
3921 *pinfo = info;
3922 }
3923 return NT_STATUS_OK;
3924
3925 fail:
3926 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3927
3928 if (fsp != NULL) {
3929 close_file(req, fsp, ERROR_CLOSE);
3930 fsp = NULL;
3931 }
3932 return status;
3933 }
Working branch of Samba for id10ts