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Move parent_override_delete() to before I need to use it.
[Samba.git] / source3 / smbd / open.c
blob4d70603f53eba0ce223d756ee7ab6756e75ecb88
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 "auth.h"
31 #include "messages.h"
32
33 extern const struct generic_mapping file_generic_mapping;
34
35 struct deferred_open_record {
36 bool delayed_for_oplocks;
37 struct file_id id;
38 };
39
40 /****************************************************************************
41 SMB1 file varient of se_access_check. Never test FILE_READ_ATTRIBUTES.
42 ****************************************************************************/
43
44 NTSTATUS smb1_file_se_access_check(struct connection_struct *conn,
45 const struct security_descriptor *sd,
46 const struct security_token *token,
47 uint32_t access_desired,
48 uint32_t *access_granted)
49 {
50 *access_granted = 0;
51
52 if (get_current_uid(conn) == (uid_t)0) {
53 /* I'm sorry sir, I didn't know you were root... */
54 *access_granted = access_desired;
55 if (access_desired & SEC_FLAG_MAXIMUM_ALLOWED) {
56 *access_granted |= FILE_GENERIC_ALL;
57 }
58 return NT_STATUS_OK;
59 }
60
61 return se_access_check(sd,
62 token,
63 (access_desired & ~FILE_READ_ATTRIBUTES),
64 access_granted);
65 }
66
67 /****************************************************************************
68 If the requester wanted DELETE_ACCESS and was only rejected because
69 the file ACL didn't include DELETE_ACCESS, see if the parent ACL
70 ovverrides this.
71 ****************************************************************************/
72
73 static bool parent_override_delete(connection_struct *conn,
74 struct smb_filename *smb_fname,
75 uint32_t access_mask,
76 uint32_t rejected_mask)
77 {
78 if ((access_mask & DELETE_ACCESS) &&
79 (rejected_mask == DELETE_ACCESS) &&
80 can_delete_file_in_directory(conn, smb_fname)) {
81 return true;
82 }
83 return false;
84 }
85
86 /****************************************************************************
87 Check if we have open rights.
88 ****************************************************************************/
89
90 static NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
91 const struct smb_filename *smb_fname,
92 uint32_t access_mask,
93 uint32_t *access_granted)
94 {
95 /* Check if we have rights to open. */
96 NTSTATUS status;
97 struct security_descriptor *sd = NULL;
98 uint32_t rejected_share_access;
99
100 rejected_share_access = access_mask & ~(conn->share_access);
101
102 if (rejected_share_access) {
103 *access_granted = rejected_share_access;
104 return NT_STATUS_ACCESS_DENIED;
105 }
106
107 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
108 *access_granted = access_mask;
109
110 DEBUG(10,("smbd_check_open_rights: not checking ACL "
111 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
112 smb_fname_str_dbg(smb_fname),
113 (unsigned int)*access_granted ));
114 return NT_STATUS_OK;
115 }
116
117 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
118 (SECINFO_OWNER |
119 SECINFO_GROUP |
120 SECINFO_DACL),&sd);
121
122 if (!NT_STATUS_IS_OK(status)) {
123 DEBUG(10, ("smbd_check_open_rights: Could not get acl "
124 "on %s: %s\n",
125 smb_fname_str_dbg(smb_fname),
126 nt_errstr(status)));
127 return status;
128 }
129
130 status = smb1_file_se_access_check(conn,
131 sd,
132 get_current_nttok(conn),
133 access_mask,
134 access_granted);
135
136 DEBUG(10,("smbd_check_open_rights: file %s requesting "
137 "0x%x returning 0x%x (%s)\n",
138 smb_fname_str_dbg(smb_fname),
139 (unsigned int)access_mask,
140 (unsigned int)*access_granted,
141 nt_errstr(status) ));
142
143 if (!NT_STATUS_IS_OK(status)) {
144 if (DEBUGLEVEL >= 10) {
145 DEBUG(10,("smbd_check_open_rights: acl for %s is:\n",
146 smb_fname_str_dbg(smb_fname) ));
147 NDR_PRINT_DEBUG(security_descriptor, sd);
148 }
149 }
150
151 TALLOC_FREE(sd);
152
153 return status;
154 }
155
156 static NTSTATUS check_parent_access(struct connection_struct *conn,
157 struct smb_filename *smb_fname,
158 uint32_t access_mask,
159 char **pp_parent_dir,
160 struct security_descriptor **pp_parent_sd)
161 {
162 NTSTATUS status;
163 char *parent_dir = NULL;
164 struct security_descriptor *parent_sd = NULL;
165 uint32_t access_granted = 0;
166
167 if (!parent_dirname(talloc_tos(),
168 smb_fname->base_name,
169 &parent_dir,
170 NULL)) {
171 return NT_STATUS_NO_MEMORY;
172 }
173
174 status = SMB_VFS_GET_NT_ACL(conn,
175 parent_dir,
176 SECINFO_DACL,
177 &parent_sd);
178
179 if (!NT_STATUS_IS_OK(status)) {
180 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
181 "%s with error %s\n",
182 parent_dir,
183 nt_errstr(status)));
184 return status;
185 }
186
187 status = smb1_file_se_access_check(conn,
188 parent_sd,
189 get_current_nttok(conn),
190 access_mask,
191 &access_granted);
192 if(!NT_STATUS_IS_OK(status)) {
193 DEBUG(5,("check_parent_access: access check "
194 "on directory %s for "
195 "path %s for mask 0x%x returned (0x%x) %s\n",
196 parent_dir,
197 smb_fname->base_name,
198 access_mask,
199 access_granted,
200 nt_errstr(status) ));
201 return status;
202 }
203
204 if (pp_parent_dir) {
205 *pp_parent_dir = parent_dir;
206 }
207 if (pp_parent_sd) {
208 *pp_parent_sd = parent_sd;
209 }
210 return NT_STATUS_OK;
211 }
212
213 /****************************************************************************
214 fd support routines - attempt to do a dos_open.
215 ****************************************************************************/
216
217 static NTSTATUS fd_open(struct connection_struct *conn,
218 files_struct *fsp,
219 int flags,
220 mode_t mode)
221 {
222 struct smb_filename *smb_fname = fsp->fsp_name;
223 NTSTATUS status = NT_STATUS_OK;
224
225 #ifdef O_NOFOLLOW
226 /*
227 * Never follow symlinks on a POSIX client. The
228 * client should be doing this.
229 */
230
231 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
232 flags |= O_NOFOLLOW;
233 }
234 #endif
235
236 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
237 if (fsp->fh->fd == -1) {
238 status = map_nt_error_from_unix(errno);
239 if (errno == EMFILE) {
240 static time_t last_warned = 0L;
241
242 if (time((time_t *) NULL) > last_warned) {
243 DEBUG(0,("Too many open files, unable "
244 "to open more! smbd's max "
245 "open files = %d\n",
246 lp_max_open_files()));
247 last_warned = time((time_t *) NULL);
248 }
249 }
250
251 }
252
253 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
254 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
255 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
256
257 return status;
258 }
259
260 /****************************************************************************
261 Close the file associated with a fsp.
262 ****************************************************************************/
263
264 NTSTATUS fd_close(files_struct *fsp)
265 {
266 int ret;
267
268 if (fsp->dptr) {
269 dptr_CloseDir(fsp);
270 }
271 if (fsp->fh->fd == -1) {
272 return NT_STATUS_OK; /* What we used to call a stat open. */
273 }
274 if (fsp->fh->ref_count > 1) {
275 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
276 }
277
278 ret = SMB_VFS_CLOSE(fsp);
279 fsp->fh->fd = -1;
280 if (ret == -1) {
281 return map_nt_error_from_unix(errno);
282 }
283 return NT_STATUS_OK;
284 }
285
286 /****************************************************************************
287 Change the ownership of a file to that of the parent directory.
288 Do this by fd if possible.
289 ****************************************************************************/
290
291 void change_file_owner_to_parent(connection_struct *conn,
292 const char *inherit_from_dir,
293 files_struct *fsp)
294 {
295 struct smb_filename *smb_fname_parent = NULL;
296 NTSTATUS status;
297 int ret;
298
299 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
300 NULL, NULL, &smb_fname_parent);
301 if (!NT_STATUS_IS_OK(status)) {
302 return;
303 }
304
305 ret = SMB_VFS_STAT(conn, smb_fname_parent);
306 if (ret == -1) {
307 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
308 "directory %s. Error was %s\n",
309 smb_fname_str_dbg(smb_fname_parent),
310 strerror(errno)));
311 TALLOC_FREE(smb_fname_parent);
312 return;
313 }
314
315 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
316 /* Already this uid - no need to change. */
317 DEBUG(10,("change_file_owner_to_parent: file %s "
318 "is already owned by uid %d\n",
319 fsp_str_dbg(fsp),
320 (int)fsp->fsp_name->st.st_ex_uid ));
321 TALLOC_FREE(smb_fname_parent);
322 return;
323 }
324
325 become_root();
326 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
327 unbecome_root();
328 if (ret == -1) {
329 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
330 "file %s to parent directory uid %u. Error "
331 "was %s\n", fsp_str_dbg(fsp),
332 (unsigned int)smb_fname_parent->st.st_ex_uid,
333 strerror(errno) ));
334 } else {
335 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
336 "parent directory uid %u.\n", fsp_str_dbg(fsp),
337 (unsigned int)smb_fname_parent->st.st_ex_uid));
338 /* Ensure the uid entry is updated. */
339 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
340 }
341
342 TALLOC_FREE(smb_fname_parent);
343 }
344
345 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
346 const char *inherit_from_dir,
347 const char *fname,
348 SMB_STRUCT_STAT *psbuf)
349 {
350 struct smb_filename *smb_fname_parent = NULL;
351 struct smb_filename *smb_fname_cwd = NULL;
352 char *saved_dir = NULL;
353 TALLOC_CTX *ctx = talloc_tos();
354 NTSTATUS status = NT_STATUS_OK;
355 int ret;
356
357 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
358 &smb_fname_parent);
359 if (!NT_STATUS_IS_OK(status)) {
360 return status;
361 }
362
363 ret = SMB_VFS_STAT(conn, smb_fname_parent);
364 if (ret == -1) {
365 status = map_nt_error_from_unix(errno);
366 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
367 "directory %s. Error was %s\n",
368 smb_fname_str_dbg(smb_fname_parent),
369 strerror(errno)));
370 goto out;
371 }
372
373 /* We've already done an lstat into psbuf, and we know it's a
374 directory. If we can cd into the directory and the dev/ino
375 are the same then we can safely chown without races as
376 we're locking the directory in place by being in it. This
377 should work on any UNIX (thanks tridge :-). JRA.
378 */
379
380 saved_dir = vfs_GetWd(ctx,conn);
381 if (!saved_dir) {
382 status = map_nt_error_from_unix(errno);
383 DEBUG(0,("change_dir_owner_to_parent: failed to get "
384 "current working directory. Error was %s\n",
385 strerror(errno)));
386 goto out;
387 }
388
389 /* Chdir into the new path. */
390 if (vfs_ChDir(conn, fname) == -1) {
391 status = map_nt_error_from_unix(errno);
392 DEBUG(0,("change_dir_owner_to_parent: failed to change "
393 "current working directory to %s. Error "
394 "was %s\n", fname, strerror(errno) ));
395 goto chdir;
396 }
397
398 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
399 &smb_fname_cwd);
400 if (!NT_STATUS_IS_OK(status)) {
401 return status;
402 }
403
404 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
405 if (ret == -1) {
406 status = map_nt_error_from_unix(errno);
407 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
408 "directory '.' (%s) Error was %s\n",
409 fname, strerror(errno)));
410 goto chdir;
411 }
412
413 /* Ensure we're pointing at the same place. */
414 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
415 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
416 DEBUG(0,("change_dir_owner_to_parent: "
417 "device/inode on directory %s changed. "
418 "Refusing to chown !\n", fname ));
419 status = NT_STATUS_ACCESS_DENIED;
420 goto chdir;
421 }
422
423 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
424 /* Already this uid - no need to change. */
425 DEBUG(10,("change_dir_owner_to_parent: directory %s "
426 "is already owned by uid %d\n",
427 fname,
428 (int)smb_fname_cwd->st.st_ex_uid ));
429 status = NT_STATUS_OK;
430 goto chdir;
431 }
432
433 become_root();
434 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
435 (gid_t)-1);
436 unbecome_root();
437 if (ret == -1) {
438 status = map_nt_error_from_unix(errno);
439 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
440 "directory %s to parent directory uid %u. "
441 "Error was %s\n", fname,
442 (unsigned int)smb_fname_parent->st.st_ex_uid,
443 strerror(errno) ));
444 } else {
445 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
446 "directory %s to parent directory uid %u.\n",
447 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
448 /* Ensure the uid entry is updated. */
449 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
450 }
451
452 chdir:
453 vfs_ChDir(conn,saved_dir);
454 out:
455 TALLOC_FREE(smb_fname_parent);
456 TALLOC_FREE(smb_fname_cwd);
457 return status;
458 }
459
460 /****************************************************************************
461 Open a file.
462 ****************************************************************************/
463
464 static NTSTATUS open_file(files_struct *fsp,
465 connection_struct *conn,
466 struct smb_request *req,
467 const char *parent_dir,
468 int flags,
469 mode_t unx_mode,
470 uint32 access_mask, /* client requested access mask. */
471 uint32 open_access_mask) /* what we're actually using in the open. */
472 {
473 struct smb_filename *smb_fname = fsp->fsp_name;
474 NTSTATUS status = NT_STATUS_OK;
475 int accmode = (flags & O_ACCMODE);
476 int local_flags = flags;
477 bool file_existed = VALID_STAT(fsp->fsp_name->st);
478 bool file_created = false;
479
480 fsp->fh->fd = -1;
481 errno = EPERM;
482
483 /* Check permissions */
484
485 /*
486 * This code was changed after seeing a client open request
487 * containing the open mode of (DENY_WRITE/read-only) with
488 * the 'create if not exist' bit set. The previous code
489 * would fail to open the file read only on a read-only share
490 * as it was checking the flags parameter directly against O_RDONLY,
491 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
492 * JRA.
493 */
494
495 if (!CAN_WRITE(conn)) {
496 /* It's a read-only share - fail if we wanted to write. */
497 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
498 DEBUG(3,("Permission denied opening %s\n",
499 smb_fname_str_dbg(smb_fname)));
500 return NT_STATUS_ACCESS_DENIED;
501 } else if(flags & O_CREAT) {
502 /* We don't want to write - but we must make sure that
503 O_CREAT doesn't create the file if we have write
504 access into the directory.
505 */
506 flags &= ~(O_CREAT|O_EXCL);
507 local_flags &= ~(O_CREAT|O_EXCL);
508 }
509 }
510
511 /*
512 * This little piece of insanity is inspired by the
513 * fact that an NT client can open a file for O_RDONLY,
514 * but set the create disposition to FILE_EXISTS_TRUNCATE.
515 * If the client *can* write to the file, then it expects to
516 * truncate the file, even though it is opening for readonly.
517 * Quicken uses this stupid trick in backup file creation...
518 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
519 * for helping track this one down. It didn't bite us in 2.0.x
520 * as we always opened files read-write in that release. JRA.
521 */
522
523 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
524 DEBUG(10,("open_file: truncate requested on read-only open "
525 "for file %s\n", smb_fname_str_dbg(smb_fname)));
526 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
527 }
528
529 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
530 (!file_existed && (local_flags & O_CREAT)) ||
531 ((local_flags & O_TRUNC) == O_TRUNC) ) {
532 const char *wild;
533
534 /*
535 * We can't actually truncate here as the file may be locked.
536 * open_file_ntcreate will take care of the truncate later. JRA.
537 */
538
539 local_flags &= ~O_TRUNC;
540
541 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
542 /*
543 * We would block on opening a FIFO with no one else on the
544 * other end. Do what we used to do and add O_NONBLOCK to the
545 * open flags. JRA.
546 */
547
548 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
549 local_flags |= O_NONBLOCK;
550 }
551 #endif
552
553 /* Don't create files with Microsoft wildcard characters. */
554 if (fsp->base_fsp) {
555 /*
556 * wildcard characters are allowed in stream names
557 * only test the basefilename
558 */
559 wild = fsp->base_fsp->fsp_name->base_name;
560 } else {
561 wild = smb_fname->base_name;
562 }
563 if ((local_flags & O_CREAT) && !file_existed &&
564 ms_has_wild(wild)) {
565 return NT_STATUS_OBJECT_NAME_INVALID;
566 }
567
568 /* Actually do the open */
569 status = fd_open(conn, fsp, local_flags, unx_mode);
570 if (!NT_STATUS_IS_OK(status)) {
571 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
572 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
573 nt_errstr(status),local_flags,flags));
574 return status;
575 }
576
577 if ((local_flags & O_CREAT) && !file_existed) {
578 file_created = true;
579 }
580
581 } else {
582 uint32_t access_granted = 0;
583
584 fsp->fh->fd = -1; /* What we used to call a stat open. */
585 if (!file_existed) {
586 /* File must exist for a stat open. */
587 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
588 }
589
590 status = smbd_check_open_rights(conn,
591 smb_fname,
592 access_mask,
593 &access_granted);
594 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
595 /*
596 * On NT_STATUS_ACCESS_DENIED, access_granted
597 * contains the denied bits.
598 */
599
600 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
601 (access_granted & FILE_WRITE_ATTRIBUTES) &&
602 (lp_map_readonly(SNUM(conn)) ||
603 lp_map_archive(SNUM(conn)) ||
604 lp_map_hidden(SNUM(conn)) ||
605 lp_map_system(SNUM(conn)))) {
606 access_granted &= ~FILE_WRITE_ATTRIBUTES;
607
608 DEBUG(10,("open_file: "
609 "overrode "
610 "FILE_WRITE_"
611 "ATTRIBUTES "
612 "on file %s\n",
613 smb_fname_str_dbg(
614 smb_fname)));
615 }
616
617 if (parent_override_delete(conn,
618 smb_fname,
619 access_mask,
620 access_granted)) {
621 /* Were we trying to do a stat open
622 * for delete and didn't get DELETE
623 * access (only) ? Check if the
624 * directory allows DELETE_CHILD.
625 * See here:
626 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
627 * for details. */
628
629 access_granted &= ~DELETE_ACCESS;
630
631 DEBUG(10,("open_file: "
632 "overrode "
633 "DELETE_ACCESS on "
634 "file %s\n",
635 smb_fname_str_dbg(
636 smb_fname)));
637 }
638
639 if (access_granted != 0) {
640 DEBUG(10,("open_file: Access "
641 "denied (0x%x) on file "
642 "%s\n",
643 access_granted,
644 smb_fname_str_dbg(
645 smb_fname)));
646 return status;
647 }
648
649 } else if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
650 fsp->posix_open &&
651 S_ISLNK(smb_fname->st.st_ex_mode)) {
652 /* This is a POSIX stat open for delete
653 * or rename on a symlink that points
654 * nowhere. Allow. */
655 DEBUG(10,("open_file: allowing POSIX "
656 "open on bad symlink %s\n",
657 smb_fname_str_dbg(
658 smb_fname)));
659 } else if (!NT_STATUS_IS_OK(status)) {
660 DEBUG(10,("open_file: "
661 "smbd_check_open_rights on file "
662 "%s returned %s\n",
663 smb_fname_str_dbg(smb_fname),
664 nt_errstr(status) ));
665 return status;
666 }
667 }
668
669 if (!file_existed) {
670 int ret;
671
672 if (fsp->fh->fd == -1) {
673 ret = SMB_VFS_STAT(conn, smb_fname);
674 } else {
675 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
676 /* If we have an fd, this stat should succeed. */
677 if (ret == -1) {
678 DEBUG(0,("Error doing fstat on open file %s "
679 "(%s)\n",
680 smb_fname_str_dbg(smb_fname),
681 strerror(errno) ));
682 }
683 }
684
685 /* For a non-io open, this stat failing means file not found. JRA */
686 if (ret == -1) {
687 status = map_nt_error_from_unix(errno);
688 fd_close(fsp);
689 return status;
690 }
691
692 if (file_created) {
693 bool need_re_stat = false;
694 /* Do all inheritance work after we've
695 done a successful stat call and filled
696 in the stat struct in fsp->fsp_name. */
697
698 /* Inherit the ACL if required */
699 if (lp_inherit_perms(SNUM(conn))) {
700 inherit_access_posix_acl(conn, parent_dir,
701 smb_fname->base_name,
702 unx_mode);
703 need_re_stat = true;
704 }
705
706 /* Change the owner if required. */
707 if (lp_inherit_owner(SNUM(conn))) {
708 change_file_owner_to_parent(conn, parent_dir,
709 fsp);
710 need_re_stat = true;
711 }
712
713 if (need_re_stat) {
714 if (fsp->fh->fd == -1) {
715 ret = SMB_VFS_STAT(conn, smb_fname);
716 } else {
717 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
718 /* If we have an fd, this stat should succeed. */
719 if (ret == -1) {
720 DEBUG(0,("Error doing fstat on open file %s "
721 "(%s)\n",
722 smb_fname_str_dbg(smb_fname),
723 strerror(errno) ));
724 }
725 }
726 }
727
728 notify_fname(conn, NOTIFY_ACTION_ADDED,
729 FILE_NOTIFY_CHANGE_FILE_NAME,
730 smb_fname->base_name);
731 }
732 }
733
734 /*
735 * POSIX allows read-only opens of directories. We don't
736 * want to do this (we use a different code path for this)
737 * so catch a directory open and return an EISDIR. JRA.
738 */
739
740 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
741 fd_close(fsp);
742 errno = EISDIR;
743 return NT_STATUS_FILE_IS_A_DIRECTORY;
744 }
745
746 fsp->mode = smb_fname->st.st_ex_mode;
747 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
748 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
749 fsp->file_pid = req ? req->smbpid : 0;
750 fsp->can_lock = True;
751 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
752 if (!CAN_WRITE(conn)) {
753 fsp->can_write = False;
754 } else {
755 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
756 True : False;
757 }
758 fsp->print_file = NULL;
759 fsp->modified = False;
760 fsp->sent_oplock_break = NO_BREAK_SENT;
761 fsp->is_directory = False;
762 if (conn->aio_write_behind_list &&
763 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
764 conn->case_sensitive)) {
765 fsp->aio_write_behind = True;
766 }
767
768 fsp->wcp = NULL; /* Write cache pointer. */
769
770 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
771 conn->session_info->unix_info->unix_name,
772 smb_fname_str_dbg(smb_fname),
773 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
774 conn->num_files_open));
775
776 errno = 0;
777 return NT_STATUS_OK;
778 }
779
780 /****************************************************************************
781 Check if we can open a file with a share mode.
782 Returns True if conflict, False if not.
783 ****************************************************************************/
784
785 static bool share_conflict(struct share_mode_entry *entry,
786 uint32 access_mask,
787 uint32 share_access)
788 {
789 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
790 "entry->share_access = 0x%x, "
791 "entry->private_options = 0x%x\n",
792 (unsigned int)entry->access_mask,
793 (unsigned int)entry->share_access,
794 (unsigned int)entry->private_options));
795
796 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
797 (unsigned int)access_mask, (unsigned int)share_access));
798
799 if ((entry->access_mask & (FILE_WRITE_DATA|
800 FILE_APPEND_DATA|
801 FILE_READ_DATA|
802 FILE_EXECUTE|
803 DELETE_ACCESS)) == 0) {
804 DEBUG(10,("share_conflict: No conflict due to "
805 "entry->access_mask = 0x%x\n",
806 (unsigned int)entry->access_mask ));
807 return False;
808 }
809
810 if ((access_mask & (FILE_WRITE_DATA|
811 FILE_APPEND_DATA|
812 FILE_READ_DATA|
813 FILE_EXECUTE|
814 DELETE_ACCESS)) == 0) {
815 DEBUG(10,("share_conflict: No conflict due to "
816 "access_mask = 0x%x\n",
817 (unsigned int)access_mask ));
818 return False;
819 }
820
821 #if 1 /* JRA TEST - Superdebug. */
822 #define CHECK_MASK(num, am, right, sa, share) \
823 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
824 (unsigned int)(num), (unsigned int)(am), \
825 (unsigned int)(right), (unsigned int)(am)&(right) )); \
826 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
827 (unsigned int)(num), (unsigned int)(sa), \
828 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
829 if (((am) & (right)) && !((sa) & (share))) { \
830 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
831 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
832 (unsigned int)(share) )); \
833 return True; \
834 }
835 #else
836 #define CHECK_MASK(num, am, right, sa, share) \
837 if (((am) & (right)) && !((sa) & (share))) { \
838 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
839 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
840 (unsigned int)(share) )); \
841 return True; \
842 }
843 #endif
844
845 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
846 share_access, FILE_SHARE_WRITE);
847 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
848 entry->share_access, FILE_SHARE_WRITE);
849
850 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
851 share_access, FILE_SHARE_READ);
852 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
853 entry->share_access, FILE_SHARE_READ);
854
855 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
856 share_access, FILE_SHARE_DELETE);
857 CHECK_MASK(6, access_mask, DELETE_ACCESS,
858 entry->share_access, FILE_SHARE_DELETE);
859
860 DEBUG(10,("share_conflict: No conflict.\n"));
861 return False;
862 }
863
864 #if defined(DEVELOPER)
865 static void validate_my_share_entries(struct smbd_server_connection *sconn,
866 int num,
867 struct share_mode_entry *share_entry)
868 {
869 files_struct *fsp;
870
871 if (!procid_is_me(&share_entry->pid)) {
872 return;
873 }
874
875 if (is_deferred_open_entry(share_entry) &&
876 !open_was_deferred(sconn, share_entry->op_mid)) {
877 char *str = talloc_asprintf(talloc_tos(),
878 "Got a deferred entry without a request: "
879 "PANIC: %s\n",
880 share_mode_str(talloc_tos(), num, share_entry));
881 smb_panic(str);
882 }
883
884 if (!is_valid_share_mode_entry(share_entry)) {
885 return;
886 }
887
888 fsp = file_find_dif(sconn, share_entry->id,
889 share_entry->share_file_id);
890 if (!fsp) {
891 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
892 share_mode_str(talloc_tos(), num, share_entry) ));
893 smb_panic("validate_my_share_entries: Cannot match a "
894 "share entry with an open file\n");
895 }
896
897 if (is_deferred_open_entry(share_entry) ||
898 is_unused_share_mode_entry(share_entry)) {
899 goto panic;
900 }
901
902 if ((share_entry->op_type == NO_OPLOCK) &&
903 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
904 /* Someone has already written to it, but I haven't yet
905 * noticed */
906 return;
907 }
908
909 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
910 goto panic;
911 }
912
913 return;
914
915 panic:
916 {
917 char *str;
918 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
919 share_mode_str(talloc_tos(), num, share_entry) ));
920 str = talloc_asprintf(talloc_tos(),
921 "validate_my_share_entries: "
922 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
923 fsp->fsp_name->base_name,
924 (unsigned int)fsp->oplock_type,
925 (unsigned int)share_entry->op_type );
926 smb_panic(str);
927 }
928 }
929 #endif
930
931 bool is_stat_open(uint32 access_mask)
932 {
933 return (access_mask &&
934 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
935 FILE_WRITE_ATTRIBUTES))==0) &&
936 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
937 FILE_WRITE_ATTRIBUTES)) != 0));
938 }
939
940 /****************************************************************************
941 Deal with share modes
942 Invarient: Share mode must be locked on entry and exit.
943 Returns -1 on error, or number of share modes on success (may be zero).
944 ****************************************************************************/
945
946 static NTSTATUS open_mode_check(connection_struct *conn,
947 struct share_mode_lock *lck,
948 uint32_t name_hash,
949 uint32 access_mask,
950 uint32 share_access,
951 uint32 create_options,
952 bool *file_existed)
953 {
954 int i;
955
956 if(lck->num_share_modes == 0) {
957 return NT_STATUS_OK;
958 }
959
960 *file_existed = True;
961
962 /* A delete on close prohibits everything */
963
964 if (is_delete_on_close_set(lck, name_hash)) {
965 return NT_STATUS_DELETE_PENDING;
966 }
967
968 if (is_stat_open(access_mask)) {
969 /* Stat open that doesn't trigger oplock breaks or share mode
970 * checks... ! JRA. */
971 return NT_STATUS_OK;
972 }
973
974 /*
975 * Check if the share modes will give us access.
976 */
977
978 #if defined(DEVELOPER)
979 for(i = 0; i < lck->num_share_modes; i++) {
980 validate_my_share_entries(conn->sconn, i,
981 &lck->share_modes[i]);
982 }
983 #endif
984
985 if (!lp_share_modes(SNUM(conn))) {
986 return NT_STATUS_OK;
987 }
988
989 /* Now we check the share modes, after any oplock breaks. */
990 for(i = 0; i < lck->num_share_modes; i++) {
991
992 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
993 continue;
994 }
995
996 /* someone else has a share lock on it, check to see if we can
997 * too */
998 if (share_conflict(&lck->share_modes[i],
999 access_mask, share_access)) {
1000 return NT_STATUS_SHARING_VIOLATION;
1001 }
1002 }
1003
1004 return NT_STATUS_OK;
1005 }
1006
1007 static bool is_delete_request(files_struct *fsp) {
1008 return ((fsp->access_mask == DELETE_ACCESS) &&
1009 (fsp->oplock_type == NO_OPLOCK));
1010 }
1011
1012 /*
1013 * Send a break message to the oplock holder and delay the open for
1014 * our client.
1015 */
1016
1017 static NTSTATUS send_break_message(files_struct *fsp,
1018 struct share_mode_entry *exclusive,
1019 uint64_t mid,
1020 int oplock_request)
1021 {
1022 NTSTATUS status;
1023 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1024
1025 DEBUG(10, ("Sending break request to PID %s\n",
1026 procid_str_static(&exclusive->pid)));
1027 exclusive->op_mid = mid;
1028
1029 /* Create the message. */
1030 share_mode_entry_to_message(msg, exclusive);
1031
1032 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1033 don't want this set in the share mode struct pointed to by lck. */
1034
1035 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1036 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1037 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1038 }
1039
1040 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1041 MSG_SMB_BREAK_REQUEST,
1042 (uint8 *)msg,
1043 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1044 if (!NT_STATUS_IS_OK(status)) {
1045 DEBUG(3, ("Could not send oplock break message: %s\n",
1046 nt_errstr(status)));
1047 }
1048
1049 return status;
1050 }
1051
1052 /*
1053 * Return share_mode_entry pointers for :
1054 * 1). Batch oplock entry.
1055 * 2). Batch or exclusive oplock entry (may be identical to #1).
1056 * bool have_level2_oplock
1057 * bool have_no_oplock.
1058 * Do internal consistency checks on the share mode for a file.
1059 */
1060
1061 static void find_oplock_types(files_struct *fsp,
1062 int oplock_request,
1063 struct share_mode_lock *lck,
1064 struct share_mode_entry **pp_batch,
1065 struct share_mode_entry **pp_ex_or_batch,
1066 bool *got_level2,
1067 bool *got_no_oplock)
1068 {
1069 int i;
1070
1071 *pp_batch = NULL;
1072 *pp_ex_or_batch = NULL;
1073 *got_level2 = false;
1074 *got_no_oplock = false;
1075
1076 /* Ignore stat or internal opens, as is done in
1077 delay_for_batch_oplocks() and
1078 delay_for_exclusive_oplocks().
1079 */
1080 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1081 return;
1082 }
1083
1084 for (i=0; i<lck->num_share_modes; i++) {
1085 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1086 continue;
1087 }
1088
1089 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1090 is_stat_open(lck->share_modes[i].access_mask)) {
1091 /* We ignore stat opens in the table - they
1092 always have NO_OPLOCK and never get or
1093 cause breaks. JRA. */
1094 continue;
1095 }
1096
1097 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1098 /* batch - can only be one. */
1099 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1100 smb_panic("Bad batch oplock entry.");
1101 }
1102 *pp_batch = &lck->share_modes[i];
1103 }
1104
1105 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1106 /* Exclusive or batch - can only be one. */
1107 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1108 smb_panic("Bad exclusive or batch oplock entry.");
1109 }
1110 *pp_ex_or_batch = &lck->share_modes[i];
1111 }
1112
1113 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1114 if (*pp_batch || *pp_ex_or_batch) {
1115 smb_panic("Bad levelII oplock entry.");
1116 }
1117 *got_level2 = true;
1118 }
1119
1120 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1121 if (*pp_batch || *pp_ex_or_batch) {
1122 smb_panic("Bad no oplock entry.");
1123 }
1124 *got_no_oplock = true;
1125 }
1126 }
1127 }
1128
1129 static bool delay_for_batch_oplocks(files_struct *fsp,
1130 uint64_t mid,
1131 int oplock_request,
1132 struct share_mode_entry *batch_entry)
1133 {
1134 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1135 return false;
1136 }
1137
1138 if (batch_entry != NULL) {
1139 /* Found a batch oplock */
1140 send_break_message(fsp, batch_entry, mid, oplock_request);
1141 return true;
1142 }
1143 return false;
1144 }
1145
1146 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1147 uint64_t mid,
1148 int oplock_request,
1149 struct share_mode_entry *ex_entry)
1150 {
1151 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1152 return false;
1153 }
1154
1155 if (ex_entry != NULL) {
1156 /* Found an exclusive or batch oplock */
1157 bool delay_it = is_delete_request(fsp) ?
1158 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1159 if (delay_it) {
1160 send_break_message(fsp, ex_entry, mid, oplock_request);
1161 return true;
1162 }
1163 }
1164 return false;
1165 }
1166
1167 static void grant_fsp_oplock_type(files_struct *fsp,
1168 const struct byte_range_lock *br_lck,
1169 int oplock_request,
1170 bool got_level2_oplock,
1171 bool got_a_none_oplock)
1172 {
1173 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1174 lp_level2_oplocks(SNUM(fsp->conn));
1175
1176 /* Start by granting what the client asked for,
1177 but ensure no SAMBA_PRIVATE bits can be set. */
1178 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1179
1180 if (oplock_request & INTERNAL_OPEN_ONLY) {
1181 /* No oplocks on internal open. */
1182 fsp->oplock_type = NO_OPLOCK;
1183 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1184 fsp->oplock_type, fsp_str_dbg(fsp)));
1185 return;
1186 } else if (br_lck && br_lck->num_locks > 0) {
1187 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1188 fsp_str_dbg(fsp)));
1189 fsp->oplock_type = NO_OPLOCK;
1190 }
1191
1192 if (is_stat_open(fsp->access_mask)) {
1193 /* Leave the value already set. */
1194 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1195 fsp->oplock_type, fsp_str_dbg(fsp)));
1196 return;
1197 }
1198
1199 /*
1200 * Match what was requested (fsp->oplock_type) with
1201 * what was found in the existing share modes.
1202 */
1203
1204 if (got_a_none_oplock) {
1205 fsp->oplock_type = NO_OPLOCK;
1206 } else if (got_level2_oplock) {
1207 if (fsp->oplock_type == NO_OPLOCK ||
1208 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1209 /* Store a level2 oplock, but don't tell the client */
1210 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1211 } else {
1212 fsp->oplock_type = LEVEL_II_OPLOCK;
1213 }
1214 } else {
1215 /* All share_mode_entries are placeholders or deferred.
1216 * Silently upgrade to fake levelII if the client didn't
1217 * ask for an oplock. */
1218 if (fsp->oplock_type == NO_OPLOCK) {
1219 /* Store a level2 oplock, but don't tell the client */
1220 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1221 }
1222 }
1223
1224 /*
1225 * Don't grant level2 to clients that don't want them
1226 * or if we've turned them off.
1227 */
1228 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1229 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1230 }
1231
1232 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1233 fsp->oplock_type, fsp_str_dbg(fsp)));
1234 }
1235
1236 bool request_timed_out(struct timeval request_time,
1237 struct timeval timeout)
1238 {
1239 struct timeval now, end_time;
1240 GetTimeOfDay(&now);
1241 end_time = timeval_sum(&request_time, &timeout);
1242 return (timeval_compare(&end_time, &now) < 0);
1243 }
1244
1245 /****************************************************************************
1246 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1247 ****************************************************************************/
1248
1249 static void defer_open(struct share_mode_lock *lck,
1250 struct timeval request_time,
1251 struct timeval timeout,
1252 struct smb_request *req,
1253 struct deferred_open_record *state)
1254 {
1255 int i;
1256
1257 /* Paranoia check */
1258
1259 for (i=0; i<lck->num_share_modes; i++) {
1260 struct share_mode_entry *e = &lck->share_modes[i];
1261
1262 if (!is_deferred_open_entry(e)) {
1263 continue;
1264 }
1265
1266 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1267 DEBUG(0, ("Trying to defer an already deferred "
1268 "request: mid=%llu, exiting\n",
1269 (unsigned long long)req->mid));
1270 exit_server("attempt to defer a deferred request");
1271 }
1272 }
1273
1274 /* End paranoia check */
1275
1276 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1277 "open entry for mid %llu\n",
1278 (unsigned int)request_time.tv_sec,
1279 (unsigned int)request_time.tv_usec,
1280 (unsigned long long)req->mid));
1281
1282 if (!push_deferred_open_message_smb(req, request_time, timeout,
1283 state->id, (char *)state, sizeof(*state))) {
1284 exit_server("push_deferred_open_message_smb failed");
1285 }
1286 add_deferred_open(lck, req->mid, request_time,
1287 sconn_server_id(req->sconn), state->id);
1288 }
1289
1290
1291 /****************************************************************************
1292 On overwrite open ensure that the attributes match.
1293 ****************************************************************************/
1294
1295 bool open_match_attributes(connection_struct *conn,
1296 uint32 old_dos_attr,
1297 uint32 new_dos_attr,
1298 mode_t existing_unx_mode,
1299 mode_t new_unx_mode,
1300 mode_t *returned_unx_mode)
1301 {
1302 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1303
1304 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1305 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1306
1307 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1308 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1309 *returned_unx_mode = new_unx_mode;
1310 } else {
1311 *returned_unx_mode = (mode_t)0;
1312 }
1313
1314 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1315 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1316 "returned_unx_mode = 0%o\n",
1317 (unsigned int)old_dos_attr,
1318 (unsigned int)existing_unx_mode,
1319 (unsigned int)new_dos_attr,
1320 (unsigned int)*returned_unx_mode ));
1321
1322 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1323 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1324 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1325 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1326 return False;
1327 }
1328 }
1329 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1330 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1331 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1332 return False;
1333 }
1334 }
1335 return True;
1336 }
1337
1338 /****************************************************************************
1339 Special FCB or DOS processing in the case of a sharing violation.
1340 Try and find a duplicated file handle.
1341 ****************************************************************************/
1342
1343 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1344 connection_struct *conn,
1345 files_struct *fsp_to_dup_into,
1346 const struct smb_filename *smb_fname,
1347 struct file_id id,
1348 uint16 file_pid,
1349 uint16 vuid,
1350 uint32 access_mask,
1351 uint32 share_access,
1352 uint32 create_options)
1353 {
1354 files_struct *fsp;
1355
1356 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1357 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1358
1359 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1360 fsp = file_find_di_next(fsp)) {
1361
1362 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1363 "vuid = %u, file_pid = %u, private_options = 0x%x "
1364 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1365 fsp->fh->fd, (unsigned int)fsp->vuid,
1366 (unsigned int)fsp->file_pid,
1367 (unsigned int)fsp->fh->private_options,
1368 (unsigned int)fsp->access_mask ));
1369
1370 if (fsp->fh->fd != -1 &&
1371 fsp->vuid == vuid &&
1372 fsp->file_pid == file_pid &&
1373 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1374 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1375 (fsp->access_mask & FILE_WRITE_DATA) &&
1376 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1377 strequal(fsp->fsp_name->stream_name,
1378 smb_fname->stream_name)) {
1379 DEBUG(10,("fcb_or_dos_open: file match\n"));
1380 break;
1381 }
1382 }
1383
1384 if (!fsp) {
1385 return NT_STATUS_NOT_FOUND;
1386 }
1387
1388 /* quite an insane set of semantics ... */
1389 if (is_executable(smb_fname->base_name) &&
1390 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1391 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1392 return NT_STATUS_INVALID_PARAMETER;
1393 }
1394
1395 /* We need to duplicate this fsp. */
1396 return dup_file_fsp(req, fsp, access_mask, share_access,
1397 create_options, fsp_to_dup_into);
1398 }
1399
1400 static void schedule_defer_open(struct share_mode_lock *lck,
1401 struct timeval request_time,
1402 struct smb_request *req)
1403 {
1404 struct deferred_open_record state;
1405
1406 /* This is a relative time, added to the absolute
1407 request_time value to get the absolute timeout time.
1408 Note that if this is the second or greater time we enter
1409 this codepath for this particular request mid then
1410 request_time is left as the absolute time of the *first*
1411 time this request mid was processed. This is what allows
1412 the request to eventually time out. */
1413
1414 struct timeval timeout;
1415
1416 /* Normally the smbd we asked should respond within
1417 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1418 * the client did, give twice the timeout as a safety
1419 * measure here in case the other smbd is stuck
1420 * somewhere else. */
1421
1422 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1423
1424 /* Nothing actually uses state.delayed_for_oplocks
1425 but it's handy to differentiate in debug messages
1426 between a 30 second delay due to oplock break, and
1427 a 1 second delay for share mode conflicts. */
1428
1429 state.delayed_for_oplocks = True;
1430 state.id = lck->id;
1431
1432 if (!request_timed_out(request_time, timeout)) {
1433 defer_open(lck, request_time, timeout, req, &state);
1434 }
1435 }
1436
1437 /****************************************************************************
1438 Work out what access_mask to use from what the client sent us.
1439 ****************************************************************************/
1440
1441 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1442 const struct smb_filename *smb_fname,
1443 bool file_existed,
1444 uint32_t access_mask,
1445 uint32_t *access_mask_out)
1446 {
1447 NTSTATUS status;
1448 uint32_t orig_access_mask = access_mask;
1449 uint32_t rejected_share_access;
1450
1451 /*
1452 * Convert GENERIC bits to specific bits.
1453 */
1454
1455 se_map_generic(&access_mask, &file_generic_mapping);
1456
1457 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1458 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1459 if (file_existed) {
1460
1461 struct security_descriptor *sd;
1462 uint32_t access_granted = 0;
1463
1464 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1465 (SECINFO_OWNER |
1466 SECINFO_GROUP |
1467 SECINFO_DACL),&sd);
1468
1469 if (!NT_STATUS_IS_OK(status)) {
1470 DEBUG(10,("smbd_calculate_access_mask: "
1471 "Could not get acl on file %s: %s\n",
1472 smb_fname_str_dbg(smb_fname),
1473 nt_errstr(status)));
1474 return NT_STATUS_ACCESS_DENIED;
1475 }
1476
1477 status = smb1_file_se_access_check(conn,
1478 sd,
1479 get_current_nttok(conn),
1480 access_mask,
1481 &access_granted);
1482
1483 TALLOC_FREE(sd);
1484
1485 if (!NT_STATUS_IS_OK(status)) {
1486 DEBUG(10, ("smbd_calculate_access_mask: "
1487 "Access denied on file %s: "
1488 "when calculating maximum access\n",
1489 smb_fname_str_dbg(smb_fname)));
1490 return NT_STATUS_ACCESS_DENIED;
1491 }
1492
1493 access_mask = access_granted;
1494 } else {
1495 access_mask = FILE_GENERIC_ALL;
1496 }
1497
1498 access_mask &= conn->share_access;
1499 }
1500
1501 rejected_share_access = access_mask & ~(conn->share_access);
1502
1503 if (rejected_share_access) {
1504 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1505 "file %s: rejected by share access mask[0x%08X] "
1506 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1507 smb_fname_str_dbg(smb_fname),
1508 conn->share_access,
1509 orig_access_mask, access_mask,
1510 rejected_share_access));
1511 return NT_STATUS_ACCESS_DENIED;
1512 }
1513
1514 *access_mask_out = access_mask;
1515 return NT_STATUS_OK;
1516 }
1517
1518 /****************************************************************************
1519 Remove the deferred open entry under lock.
1520 ****************************************************************************/
1521
1522 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1523 struct server_id pid)
1524 {
1525 struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1526 NULL, NULL, NULL);
1527 if (lck == NULL) {
1528 DEBUG(0, ("could not get share mode lock\n"));
1529 } else {
1530 del_deferred_open_entry(lck, mid, pid);
1531 TALLOC_FREE(lck);
1532 }
1533 }
1534
1535 /****************************************************************
1536 Ensure we get the brlock lock followed by the share mode lock
1537 in the correct order to prevent deadlocks if other smbd's are
1538 using the brlock database on this file simultaneously with this open
1539 (that code also gets the locks in brlock -> share mode lock order).
1540 ****************************************************************/
1541
1542 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1543 files_struct *fsp,
1544 const struct file_id id,
1545 const char *connectpath,
1546 const struct smb_filename *smb_fname,
1547 const struct timespec *p_old_write_time,
1548 struct share_mode_lock **p_lck,
1549 struct byte_range_lock **p_br_lck)
1550 {
1551 /* Ordering - we must get the br_lck for this
1552 file before the share mode. */
1553 if (lp_locking(fsp->conn->params)) {
1554 *p_br_lck = brl_get_locks_readonly(fsp);
1555 if (*p_br_lck == NULL) {
1556 DEBUG(0, ("Could not get br_lock\n"));
1557 return false;
1558 }
1559 /* Note - we don't need to free the returned
1560 br_lck explicitly as it was allocated on talloc_tos()
1561 and so will be autofreed (and release the lock)
1562 once the frame context disappears.
1563
1564 If it was set to fsp->brlock_rec then it was
1565 talloc_move'd to hang off the fsp pointer and
1566 in this case is guarenteed to not be holding the
1567 lock on the brlock database. */
1568 }
1569
1570 *p_lck = get_share_mode_lock(mem_ctx,
1571 id,
1572 connectpath,
1573 smb_fname,
1574 p_old_write_time);
1575
1576 if (*p_lck == NULL) {
1577 DEBUG(0, ("Could not get share mode lock\n"));
1578 TALLOC_FREE(*p_br_lck);
1579 return false;
1580 }
1581 return true;
1582 }
1583
1584 /****************************************************************************
1585 Open a file with a share mode. Passed in an already created files_struct *.
1586 ****************************************************************************/
1587
1588 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1589 struct smb_request *req,
1590 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1591 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1592 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1593 uint32 create_options, /* options such as delete on close. */
1594 uint32 new_dos_attributes, /* attributes used for new file. */
1595 int oplock_request, /* internal Samba oplock codes. */
1596 /* Information (FILE_EXISTS etc.) */
1597 uint32_t private_flags, /* Samba specific flags. */
1598 int *pinfo,
1599 files_struct *fsp)
1600 {
1601 struct smb_filename *smb_fname = fsp->fsp_name;
1602 int flags=0;
1603 int flags2=0;
1604 bool file_existed = VALID_STAT(smb_fname->st);
1605 bool def_acl = False;
1606 bool posix_open = False;
1607 bool new_file_created = False;
1608 bool clear_ads = false;
1609 struct file_id id;
1610 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1611 mode_t new_unx_mode = (mode_t)0;
1612 mode_t unx_mode = (mode_t)0;
1613 int info;
1614 uint32 existing_dos_attributes = 0;
1615 struct timeval request_time = timeval_zero();
1616 struct share_mode_lock *lck = NULL;
1617 uint32 open_access_mask = access_mask;
1618 NTSTATUS status;
1619 char *parent_dir;
1620
1621 ZERO_STRUCT(id);
1622
1623 if (conn->printer) {
1624 /*
1625 * Printers are handled completely differently.
1626 * Most of the passed parameters are ignored.
1627 */
1628
1629 if (pinfo) {
1630 *pinfo = FILE_WAS_CREATED;
1631 }
1632
1633 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1634 smb_fname_str_dbg(smb_fname)));
1635
1636 if (!req) {
1637 DEBUG(0,("open_file_ntcreate: printer open without "
1638 "an SMB request!\n"));
1639 return NT_STATUS_INTERNAL_ERROR;
1640 }
1641
1642 return print_spool_open(fsp, smb_fname->base_name,
1643 req->vuid);
1644 }
1645
1646 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1647 NULL)) {
1648 return NT_STATUS_NO_MEMORY;
1649 }
1650
1651 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1652 posix_open = True;
1653 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1654 new_dos_attributes = 0;
1655 } else {
1656 /* Windows allows a new file to be created and
1657 silently removes a FILE_ATTRIBUTE_DIRECTORY
1658 sent by the client. Do the same. */
1659
1660 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1661
1662 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1663 * created new. */
1664 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1665 smb_fname, parent_dir);
1666 }
1667
1668 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1669 "access_mask=0x%x share_access=0x%x "
1670 "create_disposition = 0x%x create_options=0x%x "
1671 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1672 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1673 access_mask, share_access, create_disposition,
1674 create_options, (unsigned int)unx_mode, oplock_request,
1675 (unsigned int)private_flags));
1676
1677 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1678 DEBUG(0, ("No smb request but not an internal only open!\n"));
1679 return NT_STATUS_INTERNAL_ERROR;
1680 }
1681
1682 /*
1683 * Only non-internal opens can be deferred at all
1684 */
1685
1686 if (req) {
1687 void *ptr;
1688 if (get_deferred_open_message_state(req,
1689 &request_time,
1690 &ptr)) {
1691
1692 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1693 /* Remember the absolute time of the original
1694 request with this mid. We'll use it later to
1695 see if this has timed out. */
1696
1697 /* Remove the deferred open entry under lock. */
1698 remove_deferred_open_entry(
1699 state->id, req->mid,
1700 sconn_server_id(req->sconn));
1701
1702 /* Ensure we don't reprocess this message. */
1703 remove_deferred_open_message_smb(req->sconn, req->mid);
1704 }
1705 }
1706
1707 status = check_name(conn, smb_fname->base_name);
1708 if (!NT_STATUS_IS_OK(status)) {
1709 return status;
1710 }
1711
1712 if (!posix_open) {
1713 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1714 if (file_existed) {
1715 existing_dos_attributes = dos_mode(conn, smb_fname);
1716 }
1717 }
1718
1719 /* ignore any oplock requests if oplocks are disabled */
1720 if (!lp_oplocks(SNUM(conn)) ||
1721 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1722 /* Mask off everything except the private Samba bits. */
1723 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1724 }
1725
1726 /* this is for OS/2 long file names - say we don't support them */
1727 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1728 /* OS/2 Workplace shell fix may be main code stream in a later
1729 * release. */
1730 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1731 "supported.\n"));
1732 if (use_nt_status()) {
1733 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1734 }
1735 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1736 }
1737
1738 switch( create_disposition ) {
1739 /*
1740 * Currently we're using FILE_SUPERSEDE as the same as
1741 * FILE_OVERWRITE_IF but they really are
1742 * different. FILE_SUPERSEDE deletes an existing file
1743 * (requiring delete access) then recreates it.
1744 */
1745 case FILE_SUPERSEDE:
1746 /* If file exists replace/overwrite. If file doesn't
1747 * exist create. */
1748 flags2 |= (O_CREAT | O_TRUNC);
1749 clear_ads = true;
1750 break;
1751
1752 case FILE_OVERWRITE_IF:
1753 /* If file exists replace/overwrite. If file doesn't
1754 * exist create. */
1755 flags2 |= (O_CREAT | O_TRUNC);
1756 clear_ads = true;
1757 break;
1758
1759 case FILE_OPEN:
1760 /* If file exists open. If file doesn't exist error. */
1761 if (!file_existed) {
1762 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1763 "requested for file %s and file "
1764 "doesn't exist.\n",
1765 smb_fname_str_dbg(smb_fname)));
1766 errno = ENOENT;
1767 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1768 }
1769 break;
1770
1771 case FILE_OVERWRITE:
1772 /* If file exists overwrite. If file doesn't exist
1773 * error. */
1774 if (!file_existed) {
1775 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1776 "requested for file %s and file "
1777 "doesn't exist.\n",
1778 smb_fname_str_dbg(smb_fname) ));
1779 errno = ENOENT;
1780 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1781 }
1782 flags2 |= O_TRUNC;
1783 clear_ads = true;
1784 break;
1785
1786 case FILE_CREATE:
1787 /* If file exists error. If file doesn't exist
1788 * create. */
1789 if (file_existed) {
1790 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1791 "requested for file %s and file "
1792 "already exists.\n",
1793 smb_fname_str_dbg(smb_fname)));
1794 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1795 errno = EISDIR;
1796 } else {
1797 errno = EEXIST;
1798 }
1799 return map_nt_error_from_unix(errno);
1800 }
1801 flags2 |= (O_CREAT|O_EXCL);
1802 break;
1803
1804 case FILE_OPEN_IF:
1805 /* If file exists open. If file doesn't exist
1806 * create. */
1807 flags2 |= O_CREAT;
1808 break;
1809
1810 default:
1811 return NT_STATUS_INVALID_PARAMETER;
1812 }
1813
1814 /* We only care about matching attributes on file exists and
1815 * overwrite. */
1816
1817 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1818 (create_disposition == FILE_OVERWRITE_IF))) {
1819 if (!open_match_attributes(conn, existing_dos_attributes,
1820 new_dos_attributes,
1821 smb_fname->st.st_ex_mode,
1822 unx_mode, &new_unx_mode)) {
1823 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1824 "for file %s (%x %x) (0%o, 0%o)\n",
1825 smb_fname_str_dbg(smb_fname),
1826 existing_dos_attributes,
1827 new_dos_attributes,
1828 (unsigned int)smb_fname->st.st_ex_mode,
1829 (unsigned int)unx_mode ));
1830 errno = EACCES;
1831 return NT_STATUS_ACCESS_DENIED;
1832 }
1833 }
1834
1835 status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1836 access_mask,
1837 &access_mask);
1838 if (!NT_STATUS_IS_OK(status)) {
1839 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1840 "on file %s returned %s\n",
1841 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1842 return status;
1843 }
1844
1845 open_access_mask = access_mask;
1846
1847 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1848 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1849 }
1850
1851 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1852 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1853 access_mask));
1854
1855 /*
1856 * Note that we ignore the append flag as append does not
1857 * mean the same thing under DOS and Unix.
1858 */
1859
1860 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1861 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1862 /* DENY_DOS opens are always underlying read-write on the
1863 file handle, no matter what the requested access mask
1864 says. */
1865 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1866 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1867 flags = O_RDWR;
1868 } else {
1869 flags = O_WRONLY;
1870 }
1871 } else {
1872 flags = O_RDONLY;
1873 }
1874
1875 /*
1876 * Currently we only look at FILE_WRITE_THROUGH for create options.
1877 */
1878
1879 #if defined(O_SYNC)
1880 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1881 flags2 |= O_SYNC;
1882 }
1883 #endif /* O_SYNC */
1884
1885 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1886 flags2 |= O_APPEND;
1887 }
1888
1889 if (!posix_open && !CAN_WRITE(conn)) {
1890 /*
1891 * We should really return a permission denied error if either
1892 * O_CREAT or O_TRUNC are set, but for compatibility with
1893 * older versions of Samba we just AND them out.
1894 */
1895 flags2 &= ~(O_CREAT|O_TRUNC);
1896 }
1897
1898 /*
1899 * Ensure we can't write on a read-only share or file.
1900 */
1901
1902 if (flags != O_RDONLY && file_existed &&
1903 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1904 DEBUG(5,("open_file_ntcreate: write access requested for "
1905 "file %s on read only %s\n",
1906 smb_fname_str_dbg(smb_fname),
1907 !CAN_WRITE(conn) ? "share" : "file" ));
1908 errno = EACCES;
1909 return NT_STATUS_ACCESS_DENIED;
1910 }
1911
1912 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1913 fsp->share_access = share_access;
1914 fsp->fh->private_options = private_flags;
1915 fsp->access_mask = open_access_mask; /* We change this to the
1916 * requested access_mask after
1917 * the open is done. */
1918 fsp->posix_open = posix_open;
1919
1920 /* Ensure no SAMBA_PRIVATE bits can be set. */
1921 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1922
1923 if (timeval_is_zero(&request_time)) {
1924 request_time = fsp->open_time;
1925 }
1926
1927 if (file_existed) {
1928 struct byte_range_lock *br_lck = NULL;
1929 struct share_mode_entry *batch_entry = NULL;
1930 struct share_mode_entry *exclusive_entry = NULL;
1931 bool got_level2_oplock = false;
1932 bool got_a_none_oplock = false;
1933
1934 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1935 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1936
1937 if (!acquire_ordered_locks(talloc_tos(),
1938 fsp,
1939 id,
1940 conn->connectpath,
1941 smb_fname,
1942 &old_write_time,
1943 &lck,
1944 &br_lck)) {
1945 return NT_STATUS_SHARING_VIOLATION;
1946 }
1947
1948 /* Get the types we need to examine. */
1949 find_oplock_types(fsp,
1950 oplock_request,
1951 lck,
1952 &batch_entry,
1953 &exclusive_entry,
1954 &got_level2_oplock,
1955 &got_a_none_oplock);
1956
1957 /* First pass - send break only on batch oplocks. */
1958 if ((req != NULL) &&
1959 delay_for_batch_oplocks(fsp,
1960 req->mid,
1961 oplock_request,
1962 batch_entry)) {
1963 schedule_defer_open(lck, request_time, req);
1964 TALLOC_FREE(lck);
1965 return NT_STATUS_SHARING_VIOLATION;
1966 }
1967
1968 /* Use the client requested access mask here, not the one we
1969 * open with. */
1970 status = open_mode_check(conn, lck, fsp->name_hash,
1971 access_mask, share_access,
1972 create_options, &file_existed);
1973
1974 if (NT_STATUS_IS_OK(status)) {
1975 /* We might be going to allow this open. Check oplock
1976 * status again. */
1977 /* Second pass - send break for both batch or
1978 * exclusive oplocks. */
1979 if ((req != NULL) &&
1980 delay_for_exclusive_oplocks(
1981 fsp,
1982 req->mid,
1983 oplock_request,
1984 exclusive_entry)) {
1985 schedule_defer_open(lck, request_time, req);
1986 TALLOC_FREE(lck);
1987 return NT_STATUS_SHARING_VIOLATION;
1988 }
1989 }
1990
1991 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1992 /* DELETE_PENDING is not deferred for a second */
1993 TALLOC_FREE(lck);
1994 return status;
1995 }
1996
1997 grant_fsp_oplock_type(fsp,
1998 br_lck,
1999 oplock_request,
2000 got_level2_oplock,
2001 got_a_none_oplock);
2002
2003 if (!NT_STATUS_IS_OK(status)) {
2004 uint32 can_access_mask;
2005 bool can_access = True;
2006
2007 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2008
2009 /* Check if this can be done with the deny_dos and fcb
2010 * calls. */
2011 if (private_flags &
2012 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2013 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2014 if (req == NULL) {
2015 DEBUG(0, ("DOS open without an SMB "
2016 "request!\n"));
2017 TALLOC_FREE(lck);
2018 return NT_STATUS_INTERNAL_ERROR;
2019 }
2020
2021 /* Use the client requested access mask here,
2022 * not the one we open with. */
2023 status = fcb_or_dos_open(req,
2024 conn,
2025 fsp,
2026 smb_fname,
2027 id,
2028 req->smbpid,
2029 req->vuid,
2030 access_mask,
2031 share_access,
2032 create_options);
2033
2034 if (NT_STATUS_IS_OK(status)) {
2035 TALLOC_FREE(lck);
2036 if (pinfo) {
2037 *pinfo = FILE_WAS_OPENED;
2038 }
2039 return NT_STATUS_OK;
2040 }
2041 }
2042
2043 /*
2044 * This next line is a subtlety we need for
2045 * MS-Access. If a file open will fail due to share
2046 * permissions and also for security (access) reasons,
2047 * we need to return the access failed error, not the
2048 * share error. We can't open the file due to kernel
2049 * oplock deadlock (it's possible we failed above on
2050 * the open_mode_check()) so use a userspace check.
2051 */
2052
2053 if (flags & O_RDWR) {
2054 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2055 } else if (flags & O_WRONLY) {
2056 can_access_mask = FILE_WRITE_DATA;
2057 } else {
2058 can_access_mask = FILE_READ_DATA;
2059 }
2060
2061 if (((can_access_mask & FILE_WRITE_DATA) &&
2062 !CAN_WRITE(conn)) ||
2063 !can_access_file_data(conn, smb_fname,
2064 can_access_mask)) {
2065 can_access = False;
2066 }
2067
2068 /*
2069 * If we're returning a share violation, ensure we
2070 * cope with the braindead 1 second delay.
2071 */
2072
2073 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2074 lp_defer_sharing_violations()) {
2075 struct timeval timeout;
2076 struct deferred_open_record state;
2077 int timeout_usecs;
2078
2079 /* this is a hack to speed up torture tests
2080 in 'make test' */
2081 timeout_usecs = lp_parm_int(SNUM(conn),
2082 "smbd","sharedelay",
2083 SHARING_VIOLATION_USEC_WAIT);
2084
2085 /* This is a relative time, added to the absolute
2086 request_time value to get the absolute timeout time.
2087 Note that if this is the second or greater time we enter
2088 this codepath for this particular request mid then
2089 request_time is left as the absolute time of the *first*
2090 time this request mid was processed. This is what allows
2091 the request to eventually time out. */
2092
2093 timeout = timeval_set(0, timeout_usecs);
2094
2095 /* Nothing actually uses state.delayed_for_oplocks
2096 but it's handy to differentiate in debug messages
2097 between a 30 second delay due to oplock break, and
2098 a 1 second delay for share mode conflicts. */
2099
2100 state.delayed_for_oplocks = False;
2101 state.id = id;
2102
2103 if ((req != NULL)
2104 && !request_timed_out(request_time,
2105 timeout)) {
2106 defer_open(lck, request_time, timeout,
2107 req, &state);
2108 }
2109 }
2110
2111 TALLOC_FREE(lck);
2112 if (can_access) {
2113 /*
2114 * We have detected a sharing violation here
2115 * so return the correct error code
2116 */
2117 status = NT_STATUS_SHARING_VIOLATION;
2118 } else {
2119 status = NT_STATUS_ACCESS_DENIED;
2120 }
2121 return status;
2122 }
2123
2124 /*
2125 * We exit this block with the share entry *locked*.....
2126 */
2127 }
2128
2129 SMB_ASSERT(!file_existed || (lck != NULL));
2130
2131 /*
2132 * Ensure we pay attention to default ACLs on directories if required.
2133 */
2134
2135 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2136 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2137 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2138 }
2139
2140 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2141 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2142 (unsigned int)flags, (unsigned int)flags2,
2143 (unsigned int)unx_mode, (unsigned int)access_mask,
2144 (unsigned int)open_access_mask));
2145
2146 /*
2147 * open_file strips any O_TRUNC flags itself.
2148 */
2149
2150 fsp_open = open_file(fsp, conn, req, parent_dir,
2151 flags|flags2, unx_mode, access_mask,
2152 open_access_mask);
2153
2154 if (!NT_STATUS_IS_OK(fsp_open)) {
2155 TALLOC_FREE(lck);
2156 return fsp_open;
2157 }
2158
2159 if (!file_existed) {
2160 struct byte_range_lock *br_lck = NULL;
2161 struct share_mode_entry *batch_entry = NULL;
2162 struct share_mode_entry *exclusive_entry = NULL;
2163 bool got_level2_oplock = false;
2164 bool got_a_none_oplock = false;
2165 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2166 /*
2167 * Deal with the race condition where two smbd's detect the
2168 * file doesn't exist and do the create at the same time. One
2169 * of them will win and set a share mode, the other (ie. this
2170 * one) should check if the requested share mode for this
2171 * create is allowed.
2172 */
2173
2174 /*
2175 * Now the file exists and fsp is successfully opened,
2176 * fsp->dev and fsp->inode are valid and should replace the
2177 * dev=0,inode=0 from a non existent file. Spotted by
2178 * Nadav Danieli <nadavd@exanet.com>. JRA.
2179 */
2180
2181 id = fsp->file_id;
2182
2183 if (!acquire_ordered_locks(talloc_tos(),
2184 fsp,
2185 id,
2186 conn->connectpath,
2187 smb_fname,
2188 &old_write_time,
2189 &lck,
2190 &br_lck)) {
2191 return NT_STATUS_SHARING_VIOLATION;
2192 }
2193
2194 /* Get the types we need to examine. */
2195 find_oplock_types(fsp,
2196 oplock_request,
2197 lck,
2198 &batch_entry,
2199 &exclusive_entry,
2200 &got_level2_oplock,
2201 &got_a_none_oplock);
2202
2203 /* First pass - send break only on batch oplocks. */
2204 if ((req != NULL) &&
2205 delay_for_batch_oplocks(fsp,
2206 req->mid,
2207 oplock_request,
2208 batch_entry)) {
2209 schedule_defer_open(lck, request_time, req);
2210 TALLOC_FREE(lck);
2211 fd_close(fsp);
2212 return NT_STATUS_SHARING_VIOLATION;
2213 }
2214
2215 status = open_mode_check(conn, lck, fsp->name_hash,
2216 access_mask, share_access,
2217 create_options, &file_existed);
2218
2219 if (NT_STATUS_IS_OK(status)) {
2220 /* We might be going to allow this open. Check oplock
2221 * status again. */
2222 /* Second pass - send break for both batch or
2223 * exclusive oplocks. */
2224 if ((req != NULL) &&
2225 delay_for_exclusive_oplocks(
2226 fsp,
2227 req->mid,
2228 oplock_request,
2229 exclusive_entry)) {
2230 schedule_defer_open(lck, request_time, req);
2231 TALLOC_FREE(lck);
2232 fd_close(fsp);
2233 return NT_STATUS_SHARING_VIOLATION;
2234 }
2235 }
2236
2237 if (!NT_STATUS_IS_OK(status)) {
2238 struct deferred_open_record state;
2239
2240 state.delayed_for_oplocks = False;
2241 state.id = id;
2242
2243 /* Do it all over again immediately. In the second
2244 * round we will find that the file existed and handle
2245 * the DELETE_PENDING and FCB cases correctly. No need
2246 * to duplicate the code here. Essentially this is a
2247 * "goto top of this function", but don't tell
2248 * anybody... */
2249
2250 if (req != NULL) {
2251 defer_open(lck, request_time, timeval_zero(),
2252 req, &state);
2253 }
2254 TALLOC_FREE(lck);
2255 fd_close(fsp);
2256 return status;
2257 }
2258
2259 grant_fsp_oplock_type(fsp,
2260 br_lck,
2261 oplock_request,
2262 got_level2_oplock,
2263 got_a_none_oplock);
2264
2265 /*
2266 * We exit this block with the share entry *locked*.....
2267 */
2268
2269 }
2270
2271 SMB_ASSERT(lck != NULL);
2272
2273 /* Delete streams if create_disposition requires it */
2274 if (file_existed && clear_ads &&
2275 !is_ntfs_stream_smb_fname(smb_fname)) {
2276 status = delete_all_streams(conn, smb_fname->base_name);
2277 if (!NT_STATUS_IS_OK(status)) {
2278 TALLOC_FREE(lck);
2279 fd_close(fsp);
2280 return status;
2281 }
2282 }
2283
2284 /* note that we ignore failure for the following. It is
2285 basically a hack for NFS, and NFS will never set one of
2286 these only read them. Nobody but Samba can ever set a deny
2287 mode and we have already checked our more authoritative
2288 locking database for permission to set this deny mode. If
2289 the kernel refuses the operations then the kernel is wrong.
2290 note that GPFS supports it as well - jmcd */
2291
2292 if (fsp->fh->fd != -1) {
2293 int ret_flock;
2294 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2295 if(ret_flock == -1 ){
2296
2297 TALLOC_FREE(lck);
2298 fd_close(fsp);
2299
2300 return NT_STATUS_SHARING_VIOLATION;
2301 }
2302 }
2303
2304 /*
2305 * At this point onwards, we can guarentee that the share entry
2306 * is locked, whether we created the file or not, and that the
2307 * deny mode is compatible with all current opens.
2308 */
2309
2310 /*
2311 * If requested, truncate the file.
2312 */
2313
2314 if (file_existed && (flags2&O_TRUNC)) {
2315 /*
2316 * We are modifing the file after open - update the stat
2317 * struct..
2318 */
2319 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2320 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2321 status = map_nt_error_from_unix(errno);
2322 TALLOC_FREE(lck);
2323 fd_close(fsp);
2324 return status;
2325 }
2326 }
2327
2328 /*
2329 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2330 * but we don't have to store this - just ignore it on access check.
2331 */
2332 if (conn->sconn->using_smb2) {
2333 /*
2334 * SMB2 doesn't return it (according to Microsoft tests).
2335 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2336 * File created with access = 0x7 (Read, Write, Delete)
2337 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2338 */
2339 fsp->access_mask = access_mask;
2340 } else {
2341 /* But SMB1 does. */
2342 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2343 }
2344
2345 if (file_existed) {
2346 /* stat opens on existing files don't get oplocks. */
2347 if (is_stat_open(open_access_mask)) {
2348 fsp->oplock_type = NO_OPLOCK;
2349 }
2350
2351 if (!(flags2 & O_TRUNC)) {
2352 info = FILE_WAS_OPENED;
2353 } else {
2354 info = FILE_WAS_OVERWRITTEN;
2355 }
2356 } else {
2357 info = FILE_WAS_CREATED;
2358 }
2359
2360 if (pinfo) {
2361 *pinfo = info;
2362 }
2363
2364 /*
2365 * Setup the oplock info in both the shared memory and
2366 * file structs.
2367 */
2368
2369 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2370 /*
2371 * Could not get the kernel oplock or there are byte-range
2372 * locks on the file.
2373 */
2374 fsp->oplock_type = NO_OPLOCK;
2375 }
2376
2377 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2378 new_file_created = True;
2379 }
2380
2381 set_share_mode(lck, fsp, get_current_uid(conn),
2382 req ? req->mid : 0,
2383 fsp->oplock_type);
2384
2385 /* Handle strange delete on close create semantics. */
2386 if (create_options & FILE_DELETE_ON_CLOSE) {
2387
2388 status = can_set_delete_on_close(fsp, new_dos_attributes);
2389
2390 if (!NT_STATUS_IS_OK(status)) {
2391 /* Remember to delete the mode we just added. */
2392 del_share_mode(lck, fsp);
2393 TALLOC_FREE(lck);
2394 fd_close(fsp);
2395 return status;
2396 }
2397 /* Note that here we set the *inital* delete on close flag,
2398 not the regular one. The magic gets handled in close. */
2399 fsp->initial_delete_on_close = True;
2400 }
2401
2402 if (new_file_created) {
2403 /* Files should be initially set as archive */
2404 if (lp_map_archive(SNUM(conn)) ||
2405 lp_store_dos_attributes(SNUM(conn))) {
2406 if (!posix_open) {
2407 if (file_set_dosmode(conn, smb_fname,
2408 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2409 parent_dir, true) == 0) {
2410 unx_mode = smb_fname->st.st_ex_mode;
2411 }
2412 }
2413 }
2414 }
2415
2416 /* Determine sparse flag. */
2417 if (posix_open) {
2418 /* POSIX opens are sparse by default. */
2419 fsp->is_sparse = true;
2420 } else {
2421 fsp->is_sparse = (file_existed &&
2422 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2423 }
2424
2425 /*
2426 * Take care of inherited ACLs on created files - if default ACL not
2427 * selected.
2428 */
2429
2430 if (!posix_open && !file_existed && !def_acl) {
2431
2432 int saved_errno = errno; /* We might get ENOSYS in the next
2433 * call.. */
2434
2435 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2436 errno == ENOSYS) {
2437 errno = saved_errno; /* Ignore ENOSYS */
2438 }
2439
2440 } else if (new_unx_mode) {
2441
2442 int ret = -1;
2443
2444 /* Attributes need changing. File already existed. */
2445
2446 {
2447 int saved_errno = errno; /* We might get ENOSYS in the
2448 * next call.. */
2449 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2450
2451 if (ret == -1 && errno == ENOSYS) {
2452 errno = saved_errno; /* Ignore ENOSYS */
2453 } else {
2454 DEBUG(5, ("open_file_ntcreate: reset "
2455 "attributes of file %s to 0%o\n",
2456 smb_fname_str_dbg(smb_fname),
2457 (unsigned int)new_unx_mode));
2458 ret = 0; /* Don't do the fchmod below. */
2459 }
2460 }
2461
2462 if ((ret == -1) &&
2463 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2464 DEBUG(5, ("open_file_ntcreate: failed to reset "
2465 "attributes of file %s to 0%o\n",
2466 smb_fname_str_dbg(smb_fname),
2467 (unsigned int)new_unx_mode));
2468 }
2469
2470 /* If this is a successful open, we must remove any deferred open
2471 * records. */
2472 if (req != NULL) {
2473 del_deferred_open_entry(lck, req->mid,
2474 sconn_server_id(req->sconn));
2475 }
2476 TALLOC_FREE(lck);
2477
2478 return NT_STATUS_OK;
2479 }
2480
2481
2482 /****************************************************************************
2483 Open a file for for write to ensure that we can fchmod it.
2484 ****************************************************************************/
2485
2486 NTSTATUS open_file_fchmod(connection_struct *conn,
2487 struct smb_filename *smb_fname,
2488 files_struct **result)
2489 {
2490 if (!VALID_STAT(smb_fname->st)) {
2491 return NT_STATUS_INVALID_PARAMETER;
2492 }
2493
2494 return SMB_VFS_CREATE_FILE(
2495 conn, /* conn */
2496 NULL, /* req */
2497 0, /* root_dir_fid */
2498 smb_fname, /* fname */
2499 FILE_WRITE_DATA, /* access_mask */
2500 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2501 FILE_SHARE_DELETE),
2502 FILE_OPEN, /* create_disposition*/
2503 0, /* create_options */
2504 0, /* file_attributes */
2505 INTERNAL_OPEN_ONLY, /* oplock_request */
2506 0, /* allocation_size */
2507 0, /* private_flags */
2508 NULL, /* sd */
2509 NULL, /* ea_list */
2510 result, /* result */
2511 NULL); /* pinfo */
2512 }
2513
2514 static NTSTATUS mkdir_internal(connection_struct *conn,
2515 struct smb_filename *smb_dname,
2516 uint32 file_attributes)
2517 {
2518 mode_t mode;
2519 char *parent_dir = NULL;
2520 NTSTATUS status;
2521 bool posix_open = false;
2522 bool need_re_stat = false;
2523 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2524
2525 if(access_mask & ~(conn->share_access)) {
2526 DEBUG(5,("mkdir_internal: failing share access "
2527 "%s\n", lp_servicename(SNUM(conn))));
2528 return NT_STATUS_ACCESS_DENIED;
2529 }
2530
2531 status = check_name(conn, smb_dname->base_name);
2532 if (!NT_STATUS_IS_OK(status)) {
2533 return status;
2534 }
2535
2536 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2537 NULL)) {
2538 return NT_STATUS_NO_MEMORY;
2539 }
2540
2541 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2542 posix_open = true;
2543 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2544 } else {
2545 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2546 }
2547
2548 status = check_parent_access(conn,
2549 smb_dname,
2550 access_mask,
2551 &parent_dir,
2552 NULL);
2553 if(!NT_STATUS_IS_OK(status)) {
2554 DEBUG(5,("mkdir_internal: check_parent_access "
2555 "on directory %s for path %s returned %s\n",
2556 parent_dir,
2557 smb_dname->base_name,
2558 nt_errstr(status) ));
2559 return status;
2560 }
2561
2562 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2563 return map_nt_error_from_unix(errno);
2564 }
2565
2566 /* Ensure we're checking for a symlink here.... */
2567 /* We don't want to get caught by a symlink racer. */
2568
2569 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2570 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2571 smb_fname_str_dbg(smb_dname), strerror(errno)));
2572 return map_nt_error_from_unix(errno);
2573 }
2574
2575 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2576 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2577 smb_fname_str_dbg(smb_dname)));
2578 return NT_STATUS_NOT_A_DIRECTORY;
2579 }
2580
2581 if (lp_store_dos_attributes(SNUM(conn))) {
2582 if (!posix_open) {
2583 file_set_dosmode(conn, smb_dname,
2584 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2585 parent_dir, true);
2586 }
2587 }
2588
2589 if (lp_inherit_perms(SNUM(conn))) {
2590 inherit_access_posix_acl(conn, parent_dir,
2591 smb_dname->base_name, mode);
2592 need_re_stat = true;
2593 }
2594
2595 if (!posix_open) {
2596 /*
2597 * Check if high bits should have been set,
2598 * then (if bits are missing): add them.
2599 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2600 * dir.
2601 */
2602 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2603 (mode & ~smb_dname->st.st_ex_mode)) {
2604 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2605 (smb_dname->st.st_ex_mode |
2606 (mode & ~smb_dname->st.st_ex_mode)));
2607 need_re_stat = true;
2608 }
2609 }
2610
2611 /* Change the owner if required. */
2612 if (lp_inherit_owner(SNUM(conn))) {
2613 change_dir_owner_to_parent(conn, parent_dir,
2614 smb_dname->base_name,
2615 &smb_dname->st);
2616 need_re_stat = true;
2617 }
2618
2619 if (need_re_stat) {
2620 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2621 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2622 smb_fname_str_dbg(smb_dname), strerror(errno)));
2623 return map_nt_error_from_unix(errno);
2624 }
2625 }
2626
2627 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2628 smb_dname->base_name);
2629
2630 return NT_STATUS_OK;
2631 }
2632
2633 /****************************************************************************
2634 Ensure we didn't get symlink raced on opening a directory.
2635 ****************************************************************************/
2636
2637 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2638 const SMB_STRUCT_STAT *sbuf2)
2639 {
2640 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2641 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2642 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2643 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2644 return false;
2645 }
2646 return true;
2647 }
2648
2649 /****************************************************************************
2650 Open a directory from an NT SMB call.
2651 ****************************************************************************/
2652
2653 static NTSTATUS open_directory(connection_struct *conn,
2654 struct smb_request *req,
2655 struct smb_filename *smb_dname,
2656 uint32 access_mask,
2657 uint32 share_access,
2658 uint32 create_disposition,
2659 uint32 create_options,
2660 uint32 file_attributes,
2661 int *pinfo,
2662 files_struct **result)
2663 {
2664 files_struct *fsp = NULL;
2665 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2666 struct share_mode_lock *lck = NULL;
2667 NTSTATUS status;
2668 struct timespec mtimespec;
2669 int info = 0;
2670
2671 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2672
2673 /* Ensure we have a directory attribute. */
2674 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2675
2676 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2677 "share_access = 0x%x create_options = 0x%x, "
2678 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2679 smb_fname_str_dbg(smb_dname),
2680 (unsigned int)access_mask,
2681 (unsigned int)share_access,
2682 (unsigned int)create_options,
2683 (unsigned int)create_disposition,
2684 (unsigned int)file_attributes));
2685
2686 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2687 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2688 is_ntfs_stream_smb_fname(smb_dname)) {
2689 DEBUG(2, ("open_directory: %s is a stream name!\n",
2690 smb_fname_str_dbg(smb_dname)));
2691 return NT_STATUS_NOT_A_DIRECTORY;
2692 }
2693
2694 status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2695 access_mask, &access_mask);
2696 if (!NT_STATUS_IS_OK(status)) {
2697 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2698 "on file %s returned %s\n",
2699 smb_fname_str_dbg(smb_dname),
2700 nt_errstr(status)));
2701 return status;
2702 }
2703
2704 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2705 !security_token_has_privilege(get_current_nttok(conn),
2706 SEC_PRIV_SECURITY)) {
2707 DEBUG(10, ("open_directory: open on %s "
2708 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2709 smb_fname_str_dbg(smb_dname)));
2710 return NT_STATUS_PRIVILEGE_NOT_HELD;
2711 }
2712
2713 switch( create_disposition ) {
2714 case FILE_OPEN:
2715
2716 if (!dir_existed) {
2717 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2718 }
2719
2720 info = FILE_WAS_OPENED;
2721 break;
2722
2723 case FILE_CREATE:
2724
2725 /* If directory exists error. If directory doesn't
2726 * exist create. */
2727
2728 if (dir_existed) {
2729 status = NT_STATUS_OBJECT_NAME_COLLISION;
2730 DEBUG(2, ("open_directory: unable to create "
2731 "%s. Error was %s\n",
2732 smb_fname_str_dbg(smb_dname),
2733 nt_errstr(status)));
2734 return status;
2735 }
2736
2737 status = mkdir_internal(conn, smb_dname,
2738 file_attributes);
2739
2740 if (!NT_STATUS_IS_OK(status)) {
2741 DEBUG(2, ("open_directory: unable to create "
2742 "%s. Error was %s\n",
2743 smb_fname_str_dbg(smb_dname),
2744 nt_errstr(status)));
2745 return status;
2746 }
2747
2748 info = FILE_WAS_CREATED;
2749 break;
2750
2751 case FILE_OPEN_IF:
2752 /*
2753 * If directory exists open. If directory doesn't
2754 * exist create.
2755 */
2756
2757 if (dir_existed) {
2758 status = NT_STATUS_OK;
2759 info = FILE_WAS_OPENED;
2760 } else {
2761 status = mkdir_internal(conn, smb_dname,
2762 file_attributes);
2763
2764 if (NT_STATUS_IS_OK(status)) {
2765 info = FILE_WAS_CREATED;
2766 } else {
2767 /* Cope with create race. */
2768 if (!NT_STATUS_EQUAL(status,
2769 NT_STATUS_OBJECT_NAME_COLLISION)) {
2770 DEBUG(2, ("open_directory: unable to create "
2771 "%s. Error was %s\n",
2772 smb_fname_str_dbg(smb_dname),
2773 nt_errstr(status)));
2774 return status;
2775 }
2776 info = FILE_WAS_OPENED;
2777 }
2778 }
2779
2780 break;
2781
2782 case FILE_SUPERSEDE:
2783 case FILE_OVERWRITE:
2784 case FILE_OVERWRITE_IF:
2785 default:
2786 DEBUG(5,("open_directory: invalid create_disposition "
2787 "0x%x for directory %s\n",
2788 (unsigned int)create_disposition,
2789 smb_fname_str_dbg(smb_dname)));
2790 return NT_STATUS_INVALID_PARAMETER;
2791 }
2792
2793 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2794 DEBUG(5,("open_directory: %s is not a directory !\n",
2795 smb_fname_str_dbg(smb_dname)));
2796 return NT_STATUS_NOT_A_DIRECTORY;
2797 }
2798
2799 if (info == FILE_WAS_OPENED) {
2800 uint32_t access_granted = 0;
2801 status = smbd_check_open_rights(conn, smb_dname, access_mask,
2802 &access_granted);
2803
2804 /* Were we trying to do a directory open
2805 * for delete and didn't get DELETE
2806 * access (only) ? Check if the
2807 * directory allows DELETE_CHILD.
2808 * See here:
2809 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
2810 * for details. */
2811
2812 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
2813 parent_override_delete(conn,
2814 smb_dname,
2815 access_mask,
2816 access_granted)) {
2817 DEBUG(10,("open_directory: overrode ACCESS_DENIED "
2818 "on directory %s\n",
2819 smb_fname_str_dbg(smb_dname)));
2820 status = NT_STATUS_OK;
2821 }
2822
2823 if (!NT_STATUS_IS_OK(status)) {
2824 DEBUG(10, ("open_directory: smbd_check_open_rights on "
2825 "file %s failed with %s\n",
2826 smb_fname_str_dbg(smb_dname),
2827 nt_errstr(status)));
2828 return status;
2829 }
2830 }
2831
2832 status = file_new(req, conn, &fsp);
2833 if(!NT_STATUS_IS_OK(status)) {
2834 return status;
2835 }
2836
2837 /*
2838 * Setup the files_struct for it.
2839 */
2840
2841 fsp->mode = smb_dname->st.st_ex_mode;
2842 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2843 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2844 fsp->file_pid = req ? req->smbpid : 0;
2845 fsp->can_lock = False;
2846 fsp->can_read = False;
2847 fsp->can_write = False;
2848
2849 fsp->share_access = share_access;
2850 fsp->fh->private_options = 0;
2851 /*
2852 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2853 */
2854 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2855 fsp->print_file = NULL;
2856 fsp->modified = False;
2857 fsp->oplock_type = NO_OPLOCK;
2858 fsp->sent_oplock_break = NO_BREAK_SENT;
2859 fsp->is_directory = True;
2860 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2861 status = fsp_set_smb_fname(fsp, smb_dname);
2862 if (!NT_STATUS_IS_OK(status)) {
2863 file_free(req, fsp);
2864 return status;
2865 }
2866
2867 mtimespec = smb_dname->st.st_ex_mtime;
2868
2869 #ifdef O_DIRECTORY
2870 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2871 #else
2872 /* POSIX allows us to open a directory with O_RDONLY. */
2873 status = fd_open(conn, fsp, O_RDONLY, 0);
2874 #endif
2875 if (!NT_STATUS_IS_OK(status)) {
2876 DEBUG(5, ("open_directory: Could not open fd for "
2877 "%s (%s)\n",
2878 smb_fname_str_dbg(smb_dname),
2879 nt_errstr(status)));
2880 file_free(req, fsp);
2881 return status;
2882 }
2883
2884 status = vfs_stat_fsp(fsp);
2885 if (!NT_STATUS_IS_OK(status)) {
2886 fd_close(fsp);
2887 file_free(req, fsp);
2888 return status;
2889 }
2890
2891 /* Ensure there was no race condition. */
2892 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2893 DEBUG(5,("open_directory: stat struct differs for "
2894 "directory %s.\n",
2895 smb_fname_str_dbg(smb_dname)));
2896 fd_close(fsp);
2897 file_free(req, fsp);
2898 return NT_STATUS_ACCESS_DENIED;
2899 }
2900
2901 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2902 conn->connectpath, smb_dname, &mtimespec);
2903
2904 if (lck == NULL) {
2905 DEBUG(0, ("open_directory: Could not get share mode lock for "
2906 "%s\n", smb_fname_str_dbg(smb_dname)));
2907 fd_close(fsp);
2908 file_free(req, fsp);
2909 return NT_STATUS_SHARING_VIOLATION;
2910 }
2911
2912 status = open_mode_check(conn, lck, fsp->name_hash,
2913 access_mask, share_access,
2914 create_options, &dir_existed);
2915
2916 if (!NT_STATUS_IS_OK(status)) {
2917 TALLOC_FREE(lck);
2918 fd_close(fsp);
2919 file_free(req, fsp);
2920 return status;
2921 }
2922
2923 set_share_mode(lck, fsp, get_current_uid(conn),
2924 req ? req->mid : 0, NO_OPLOCK);
2925
2926 /* For directories the delete on close bit at open time seems
2927 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2928 if (create_options & FILE_DELETE_ON_CLOSE) {
2929 status = can_set_delete_on_close(fsp, 0);
2930 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2931 TALLOC_FREE(lck);
2932 fd_close(fsp);
2933 file_free(req, fsp);
2934 return status;
2935 }
2936
2937 if (NT_STATUS_IS_OK(status)) {
2938 /* Note that here we set the *inital* delete on close flag,
2939 not the regular one. The magic gets handled in close. */
2940 fsp->initial_delete_on_close = True;
2941 }
2942 }
2943
2944 TALLOC_FREE(lck);
2945
2946 if (pinfo) {
2947 *pinfo = info;
2948 }
2949
2950 *result = fsp;
2951 return NT_STATUS_OK;
2952 }
2953
2954 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2955 struct smb_filename *smb_dname)
2956 {
2957 NTSTATUS status;
2958 files_struct *fsp;
2959
2960 status = SMB_VFS_CREATE_FILE(
2961 conn, /* conn */
2962 req, /* req */
2963 0, /* root_dir_fid */
2964 smb_dname, /* fname */
2965 FILE_READ_ATTRIBUTES, /* access_mask */
2966 FILE_SHARE_NONE, /* share_access */
2967 FILE_CREATE, /* create_disposition*/
2968 FILE_DIRECTORY_FILE, /* create_options */
2969 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2970 0, /* oplock_request */
2971 0, /* allocation_size */
2972 0, /* private_flags */
2973 NULL, /* sd */
2974 NULL, /* ea_list */
2975 &fsp, /* result */
2976 NULL); /* pinfo */
2977
2978 if (NT_STATUS_IS_OK(status)) {
2979 close_file(req, fsp, NORMAL_CLOSE);
2980 }
2981
2982 return status;
2983 }
2984
2985 /****************************************************************************
2986 Receive notification that one of our open files has been renamed by another
2987 smbd process.
2988 ****************************************************************************/
2989
2990 void msg_file_was_renamed(struct messaging_context *msg,
2991 void *private_data,
2992 uint32_t msg_type,
2993 struct server_id server_id,
2994 DATA_BLOB *data)
2995 {
2996 struct smbd_server_connection *sconn;
2997 files_struct *fsp;
2998 char *frm = (char *)data->data;
2999 struct file_id id;
3000 const char *sharepath;
3001 const char *base_name;
3002 const char *stream_name;
3003 struct smb_filename *smb_fname = NULL;
3004 size_t sp_len, bn_len;
3005 NTSTATUS status;
3006
3007 sconn = msg_ctx_to_sconn(msg);
3008 if (sconn == NULL) {
3009 DEBUG(1, ("could not find sconn\n"));
3010 return;
3011 }
3012
3013 if (data->data == NULL
3014 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3015 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3016 (int)data->length));
3017 return;
3018 }
3019
3020 /* Unpack the message. */
3021 pull_file_id_24(frm, &id);
3022 sharepath = &frm[24];
3023 sp_len = strlen(sharepath);
3024 base_name = sharepath + sp_len + 1;
3025 bn_len = strlen(base_name);
3026 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3027
3028 /* stream_name must always be NULL if there is no stream. */
3029 if (stream_name[0] == '\0') {
3030 stream_name = NULL;
3031 }
3032
3033 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3034 stream_name, NULL, &smb_fname);
3035 if (!NT_STATUS_IS_OK(status)) {
3036 return;
3037 }
3038
3039 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3040 "file_id %s\n",
3041 sharepath, smb_fname_str_dbg(smb_fname),
3042 file_id_string_tos(&id)));
3043
3044 for(fsp = file_find_di_first(sconn, id); fsp;
3045 fsp = file_find_di_next(fsp)) {
3046 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3047
3048 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3049 fsp->fnum, fsp_str_dbg(fsp),
3050 smb_fname_str_dbg(smb_fname)));
3051 status = fsp_set_smb_fname(fsp, smb_fname);
3052 if (!NT_STATUS_IS_OK(status)) {
3053 goto out;
3054 }
3055 } else {
3056 /* TODO. JRA. */
3057 /* Now we have the complete path we can work out if this is
3058 actually within this share and adjust newname accordingly. */
3059 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3060 "not sharepath %s) "
3061 "fnum %d from %s -> %s\n",
3062 fsp->conn->connectpath,
3063 sharepath,
3064 fsp->fnum,
3065 fsp_str_dbg(fsp),
3066 smb_fname_str_dbg(smb_fname)));
3067 }
3068 }
3069 out:
3070 TALLOC_FREE(smb_fname);
3071 return;
3072 }
3073
3074 /*
3075 * If a main file is opened for delete, all streams need to be checked for
3076 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3077 * If that works, delete them all by setting the delete on close and close.
3078 */
3079
3080 NTSTATUS open_streams_for_delete(connection_struct *conn,
3081 const char *fname)
3082 {
3083 struct stream_struct *stream_info = NULL;
3084 files_struct **streams = NULL;
3085 int i;
3086 unsigned int num_streams = 0;
3087 TALLOC_CTX *frame = talloc_stackframe();
3088 NTSTATUS status;
3089
3090 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3091 &num_streams, &stream_info);
3092
3093 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3094 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3095 DEBUG(10, ("no streams around\n"));
3096 TALLOC_FREE(frame);
3097 return NT_STATUS_OK;
3098 }
3099
3100 if (!NT_STATUS_IS_OK(status)) {
3101 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3102 nt_errstr(status)));
3103 goto fail;
3104 }
3105
3106 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3107 num_streams));
3108
3109 if (num_streams == 0) {
3110 TALLOC_FREE(frame);
3111 return NT_STATUS_OK;
3112 }
3113
3114 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3115 if (streams == NULL) {
3116 DEBUG(0, ("talloc failed\n"));
3117 status = NT_STATUS_NO_MEMORY;
3118 goto fail;
3119 }
3120
3121 for (i=0; i<num_streams; i++) {
3122 struct smb_filename *smb_fname = NULL;
3123
3124 if (strequal(stream_info[i].name, "::$DATA")) {
3125 streams[i] = NULL;
3126 continue;
3127 }
3128
3129 status = create_synthetic_smb_fname(talloc_tos(), fname,
3130 stream_info[i].name,
3131 NULL, &smb_fname);
3132 if (!NT_STATUS_IS_OK(status)) {
3133 goto fail;
3134 }
3135
3136 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3137 DEBUG(10, ("Unable to stat stream: %s\n",
3138 smb_fname_str_dbg(smb_fname)));
3139 }
3140
3141 status = SMB_VFS_CREATE_FILE(
3142 conn, /* conn */
3143 NULL, /* req */
3144 0, /* root_dir_fid */
3145 smb_fname, /* fname */
3146 DELETE_ACCESS, /* access_mask */
3147 (FILE_SHARE_READ | /* share_access */
3148 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3149 FILE_OPEN, /* create_disposition*/
3150 0, /* create_options */
3151 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3152 0, /* oplock_request */
3153 0, /* allocation_size */
3154 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3155 NULL, /* sd */
3156 NULL, /* ea_list */
3157 &streams[i], /* result */
3158 NULL); /* pinfo */
3159
3160 if (!NT_STATUS_IS_OK(status)) {
3161 DEBUG(10, ("Could not open stream %s: %s\n",
3162 smb_fname_str_dbg(smb_fname),
3163 nt_errstr(status)));
3164
3165 TALLOC_FREE(smb_fname);
3166 break;
3167 }
3168 TALLOC_FREE(smb_fname);
3169 }
3170
3171 /*
3172 * don't touch the variable "status" beyond this point :-)
3173 */
3174
3175 for (i -= 1 ; i >= 0; i--) {
3176 if (streams[i] == NULL) {
3177 continue;
3178 }
3179
3180 DEBUG(10, ("Closing stream # %d, %s\n", i,
3181 fsp_str_dbg(streams[i])));
3182 close_file(NULL, streams[i], NORMAL_CLOSE);
3183 }
3184
3185 fail:
3186 TALLOC_FREE(frame);
3187 return status;
3188 }
3189
3190 /*
3191 * Wrapper around open_file_ntcreate and open_directory
3192 */
3193
3194 static NTSTATUS create_file_unixpath(connection_struct *conn,
3195 struct smb_request *req,
3196 struct smb_filename *smb_fname,
3197 uint32_t access_mask,
3198 uint32_t share_access,
3199 uint32_t create_disposition,
3200 uint32_t create_options,
3201 uint32_t file_attributes,
3202 uint32_t oplock_request,
3203 uint64_t allocation_size,
3204 uint32_t private_flags,
3205 struct security_descriptor *sd,
3206 struct ea_list *ea_list,
3207
3208 files_struct **result,
3209 int *pinfo)
3210 {
3211 int info = FILE_WAS_OPENED;
3212 files_struct *base_fsp = NULL;
3213 files_struct *fsp = NULL;
3214 NTSTATUS status;
3215
3216 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3217 "file_attributes = 0x%x, share_access = 0x%x, "
3218 "create_disposition = 0x%x create_options = 0x%x "
3219 "oplock_request = 0x%x private_flags = 0x%x "
3220 "ea_list = 0x%p, sd = 0x%p, "
3221 "fname = %s\n",
3222 (unsigned int)access_mask,
3223 (unsigned int)file_attributes,
3224 (unsigned int)share_access,
3225 (unsigned int)create_disposition,
3226 (unsigned int)create_options,
3227 (unsigned int)oplock_request,
3228 (unsigned int)private_flags,
3229 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3230
3231 if (create_options & FILE_OPEN_BY_FILE_ID) {
3232 status = NT_STATUS_NOT_SUPPORTED;
3233 goto fail;
3234 }
3235
3236 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3237 status = NT_STATUS_INVALID_PARAMETER;
3238 goto fail;
3239 }
3240
3241 if (req == NULL) {
3242 oplock_request |= INTERNAL_OPEN_ONLY;
3243 }
3244
3245 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3246 && (access_mask & DELETE_ACCESS)
3247 && !is_ntfs_stream_smb_fname(smb_fname)) {
3248 /*
3249 * We can't open a file with DELETE access if any of the
3250 * streams is open without FILE_SHARE_DELETE
3251 */
3252 status = open_streams_for_delete(conn, smb_fname->base_name);
3253
3254 if (!NT_STATUS_IS_OK(status)) {
3255 goto fail;
3256 }
3257 }
3258
3259 /* This is the correct thing to do (check every time) but can_delete
3260 * is expensive (it may have to read the parent directory
3261 * permissions). So for now we're not doing it unless we have a strong
3262 * hint the client is really going to delete this file. If the client
3263 * is forcing FILE_CREATE let the filesystem take care of the
3264 * permissions. */
3265
3266 /* Setting FILE_SHARE_DELETE is the hint. */
3267
3268 if ((create_disposition != FILE_CREATE)
3269 && (access_mask & DELETE_ACCESS)
3270 && (!(can_delete_file_in_directory(conn, smb_fname) ||
3271 can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
3272 status = NT_STATUS_ACCESS_DENIED;
3273 DEBUG(10,("create_file_unixpath: open file %s "
3274 "for delete ACCESS_DENIED\n",
3275 smb_fname_str_dbg(smb_fname)));
3276 goto fail;
3277 }
3278
3279 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3280 !security_token_has_privilege(get_current_nttok(conn),
3281 SEC_PRIV_SECURITY)) {
3282 DEBUG(10, ("create_file_unixpath: open on %s "
3283 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3284 smb_fname_str_dbg(smb_fname)));
3285 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3286 goto fail;
3287 }
3288
3289 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3290 && is_ntfs_stream_smb_fname(smb_fname)
3291 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3292 uint32 base_create_disposition;
3293 struct smb_filename *smb_fname_base = NULL;
3294
3295 if (create_options & FILE_DIRECTORY_FILE) {
3296 status = NT_STATUS_NOT_A_DIRECTORY;
3297 goto fail;
3298 }
3299
3300 switch (create_disposition) {
3301 case FILE_OPEN:
3302 base_create_disposition = FILE_OPEN;
3303 break;
3304 default:
3305 base_create_disposition = FILE_OPEN_IF;
3306 break;
3307 }
3308
3309 /* Create an smb_filename with stream_name == NULL. */
3310 status = create_synthetic_smb_fname(talloc_tos(),
3311 smb_fname->base_name,
3312 NULL, NULL,
3313 &smb_fname_base);
3314 if (!NT_STATUS_IS_OK(status)) {
3315 goto fail;
3316 }
3317
3318 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3319 DEBUG(10, ("Unable to stat stream: %s\n",
3320 smb_fname_str_dbg(smb_fname_base)));
3321 }
3322
3323 /* Open the base file. */
3324 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3325 FILE_SHARE_READ
3326 | FILE_SHARE_WRITE
3327 | FILE_SHARE_DELETE,
3328 base_create_disposition,
3329 0, 0, 0, 0, 0, NULL, NULL,
3330 &base_fsp, NULL);
3331 TALLOC_FREE(smb_fname_base);
3332
3333 if (!NT_STATUS_IS_OK(status)) {
3334 DEBUG(10, ("create_file_unixpath for base %s failed: "
3335 "%s\n", smb_fname->base_name,
3336 nt_errstr(status)));
3337 goto fail;
3338 }
3339 /* we don't need to low level fd */
3340 fd_close(base_fsp);
3341 }
3342
3343 /*
3344 * If it's a request for a directory open, deal with it separately.
3345 */
3346
3347 if (create_options & FILE_DIRECTORY_FILE) {
3348
3349 if (create_options & FILE_NON_DIRECTORY_FILE) {
3350 status = NT_STATUS_INVALID_PARAMETER;
3351 goto fail;
3352 }
3353
3354 /* Can't open a temp directory. IFS kit test. */
3355 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3356 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3357 status = NT_STATUS_INVALID_PARAMETER;
3358 goto fail;
3359 }
3360
3361 /*
3362 * We will get a create directory here if the Win32
3363 * app specified a security descriptor in the
3364 * CreateDirectory() call.
3365 */
3366
3367 oplock_request = 0;
3368 status = open_directory(
3369 conn, req, smb_fname, access_mask, share_access,
3370 create_disposition, create_options, file_attributes,
3371 &info, &fsp);
3372 } else {
3373
3374 /*
3375 * Ordinary file case.
3376 */
3377
3378 status = file_new(req, conn, &fsp);
3379 if(!NT_STATUS_IS_OK(status)) {
3380 goto fail;
3381 }
3382
3383 status = fsp_set_smb_fname(fsp, smb_fname);
3384 if (!NT_STATUS_IS_OK(status)) {
3385 goto fail;
3386 }
3387
3388 /*
3389 * We're opening the stream element of a base_fsp
3390 * we already opened. Set up the base_fsp pointer.
3391 */
3392 if (base_fsp) {
3393 fsp->base_fsp = base_fsp;
3394 }
3395
3396 status = open_file_ntcreate(conn,
3397 req,
3398 access_mask,
3399 share_access,
3400 create_disposition,
3401 create_options,
3402 file_attributes,
3403 oplock_request,
3404 private_flags,
3405 &info,
3406 fsp);
3407
3408 if(!NT_STATUS_IS_OK(status)) {
3409 file_free(req, fsp);
3410 fsp = NULL;
3411 }
3412
3413 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3414
3415 /* A stream open never opens a directory */
3416
3417 if (base_fsp) {
3418 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3419 goto fail;
3420 }
3421
3422 /*
3423 * Fail the open if it was explicitly a non-directory
3424 * file.
3425 */
3426
3427 if (create_options & FILE_NON_DIRECTORY_FILE) {
3428 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3429 goto fail;
3430 }
3431
3432 oplock_request = 0;
3433 status = open_directory(
3434 conn, req, smb_fname, access_mask,
3435 share_access, create_disposition,
3436 create_options, file_attributes,
3437 &info, &fsp);
3438 }
3439 }
3440
3441 if (!NT_STATUS_IS_OK(status)) {
3442 goto fail;
3443 }
3444
3445 fsp->base_fsp = base_fsp;
3446
3447 /*
3448 * According to the MS documentation, the only time the security
3449 * descriptor is applied to the opened file is iff we *created* the
3450 * file; an existing file stays the same.
3451 *
3452 * Also, it seems (from observation) that you can open the file with
3453 * any access mask but you can still write the sd. We need to override
3454 * the granted access before we call set_sd
3455 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3456 */
3457
3458 if ((sd != NULL) && (info == FILE_WAS_CREATED)
3459 && lp_nt_acl_support(SNUM(conn))) {
3460
3461 uint32_t sec_info_sent;
3462 uint32_t saved_access_mask = fsp->access_mask;
3463
3464 sec_info_sent = get_sec_info(sd);
3465
3466 fsp->access_mask = FILE_GENERIC_ALL;
3467
3468 /* Convert all the generic bits. */
3469 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3470 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3471
3472 if (sec_info_sent & (SECINFO_OWNER|
3473 SECINFO_GROUP|
3474 SECINFO_DACL|
3475 SECINFO_SACL)) {
3476 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3477 }
3478
3479 fsp->access_mask = saved_access_mask;
3480
3481 if (!NT_STATUS_IS_OK(status)) {
3482 goto fail;
3483 }
3484 }
3485
3486 if ((ea_list != NULL) &&
3487 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3488 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3489 if (!NT_STATUS_IS_OK(status)) {
3490 goto fail;
3491 }
3492 }
3493
3494 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3495 status = NT_STATUS_ACCESS_DENIED;
3496 goto fail;
3497 }
3498
3499 /* Save the requested allocation size. */
3500 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3501 if (allocation_size
3502 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3503 fsp->initial_allocation_size = smb_roundup(
3504 fsp->conn, allocation_size);
3505 if (fsp->is_directory) {
3506 /* Can't set allocation size on a directory. */
3507 status = NT_STATUS_ACCESS_DENIED;
3508 goto fail;
3509 }
3510 if (vfs_allocate_file_space(
3511 fsp, fsp->initial_allocation_size) == -1) {
3512 status = NT_STATUS_DISK_FULL;
3513 goto fail;
3514 }
3515 } else {
3516 fsp->initial_allocation_size = smb_roundup(
3517 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3518 }
3519 }
3520
3521 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3522
3523 *result = fsp;
3524 if (pinfo != NULL) {
3525 *pinfo = info;
3526 }
3527
3528 smb_fname->st = fsp->fsp_name->st;
3529
3530 return NT_STATUS_OK;
3531
3532 fail:
3533 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3534
3535 if (fsp != NULL) {
3536 if (base_fsp && fsp->base_fsp == base_fsp) {
3537 /*
3538 * The close_file below will close
3539 * fsp->base_fsp.
3540 */
3541 base_fsp = NULL;
3542 }
3543 close_file(req, fsp, ERROR_CLOSE);
3544 fsp = NULL;
3545 }
3546 if (base_fsp != NULL) {
3547 close_file(req, base_fsp, ERROR_CLOSE);
3548 base_fsp = NULL;
3549 }
3550 return status;
3551 }
3552
3553 /*
3554 * Calculate the full path name given a relative fid.
3555 */
3556 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3557 struct smb_request *req,
3558 uint16_t root_dir_fid,
3559 const struct smb_filename *smb_fname,
3560 struct smb_filename **smb_fname_out)
3561 {
3562 files_struct *dir_fsp;
3563 char *parent_fname = NULL;
3564 char *new_base_name = NULL;
3565 NTSTATUS status;
3566
3567 if (root_dir_fid == 0 || !smb_fname) {
3568 status = NT_STATUS_INTERNAL_ERROR;
3569 goto out;
3570 }
3571
3572 dir_fsp = file_fsp(req, root_dir_fid);
3573
3574 if (dir_fsp == NULL) {
3575 status = NT_STATUS_INVALID_HANDLE;
3576 goto out;
3577 }
3578
3579 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3580 status = NT_STATUS_INVALID_HANDLE;
3581 goto out;
3582 }
3583
3584 if (!dir_fsp->is_directory) {
3585
3586 /*
3587 * Check to see if this is a mac fork of some kind.
3588 */
3589
3590 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3591 is_ntfs_stream_smb_fname(smb_fname)) {
3592 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3593 goto out;
3594 }
3595
3596 /*
3597 we need to handle the case when we get a
3598 relative open relative to a file and the
3599 pathname is blank - this is a reopen!
3600 (hint from demyn plantenberg)
3601 */
3602
3603 status = NT_STATUS_INVALID_HANDLE;
3604 goto out;
3605 }
3606
3607 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3608 /*
3609 * We're at the toplevel dir, the final file name
3610 * must not contain ./, as this is filtered out
3611 * normally by srvstr_get_path and unix_convert
3612 * explicitly rejects paths containing ./.
3613 */
3614 parent_fname = talloc_strdup(talloc_tos(), "");
3615 if (parent_fname == NULL) {
3616 status = NT_STATUS_NO_MEMORY;
3617 goto out;
3618 }
3619 } else {
3620 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3621
3622 /*
3623 * Copy in the base directory name.
3624 */
3625
3626 parent_fname = talloc_array(talloc_tos(), char,
3627 dir_name_len+2);
3628 if (parent_fname == NULL) {
3629 status = NT_STATUS_NO_MEMORY;
3630 goto out;
3631 }
3632 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3633 dir_name_len+1);
3634
3635 /*
3636 * Ensure it ends in a '/'.
3637 * We used TALLOC_SIZE +2 to add space for the '/'.
3638 */
3639
3640 if(dir_name_len
3641 && (parent_fname[dir_name_len-1] != '\\')
3642 && (parent_fname[dir_name_len-1] != '/')) {
3643 parent_fname[dir_name_len] = '/';
3644 parent_fname[dir_name_len+1] = '\0';
3645 }
3646 }
3647
3648 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3649 smb_fname->base_name);
3650 if (new_base_name == NULL) {
3651 status = NT_STATUS_NO_MEMORY;
3652 goto out;
3653 }
3654
3655 status = filename_convert(req,
3656 conn,
3657 req->flags2 & FLAGS2_DFS_PATHNAMES,
3658 new_base_name,
3659 0,
3660 NULL,
3661 smb_fname_out);
3662 if (!NT_STATUS_IS_OK(status)) {
3663 goto out;
3664 }
3665
3666 out:
3667 TALLOC_FREE(parent_fname);
3668 TALLOC_FREE(new_base_name);
3669 return status;
3670 }
3671
3672 NTSTATUS create_file_default(connection_struct *conn,
3673 struct smb_request *req,
3674 uint16_t root_dir_fid,
3675 struct smb_filename *smb_fname,
3676 uint32_t access_mask,
3677 uint32_t share_access,
3678 uint32_t create_disposition,
3679 uint32_t create_options,
3680 uint32_t file_attributes,
3681 uint32_t oplock_request,
3682 uint64_t allocation_size,
3683 uint32_t private_flags,
3684 struct security_descriptor *sd,
3685 struct ea_list *ea_list,
3686 files_struct **result,
3687 int *pinfo)
3688 {
3689 int info = FILE_WAS_OPENED;
3690 files_struct *fsp = NULL;
3691 NTSTATUS status;
3692 bool stream_name = false;
3693
3694 DEBUG(10,("create_file: access_mask = 0x%x "
3695 "file_attributes = 0x%x, share_access = 0x%x, "
3696 "create_disposition = 0x%x create_options = 0x%x "
3697 "oplock_request = 0x%x "
3698 "private_flags = 0x%x "
3699 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3700 "fname = %s\n",
3701 (unsigned int)access_mask,
3702 (unsigned int)file_attributes,
3703 (unsigned int)share_access,
3704 (unsigned int)create_disposition,
3705 (unsigned int)create_options,
3706 (unsigned int)oplock_request,
3707 (unsigned int)private_flags,
3708 (unsigned int)root_dir_fid,
3709 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3710
3711 /*
3712 * Calculate the filename from the root_dir_if if necessary.
3713 */
3714
3715 if (root_dir_fid != 0) {
3716 struct smb_filename *smb_fname_out = NULL;
3717 status = get_relative_fid_filename(conn, req, root_dir_fid,
3718 smb_fname, &smb_fname_out);
3719 if (!NT_STATUS_IS_OK(status)) {
3720 goto fail;
3721 }
3722 smb_fname = smb_fname_out;
3723 }
3724
3725 /*
3726 * Check to see if this is a mac fork of some kind.
3727 */
3728
3729 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3730 if (stream_name) {
3731 enum FAKE_FILE_TYPE fake_file_type;
3732
3733 fake_file_type = is_fake_file(smb_fname);
3734
3735 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3736
3737 /*
3738 * Here we go! support for changing the disk quotas
3739 * --metze
3740 *
3741 * We need to fake up to open this MAGIC QUOTA file
3742 * and return a valid FID.
3743 *
3744 * w2k close this file directly after openening xp
3745 * also tries a QUERY_FILE_INFO on the file and then
3746 * close it
3747 */
3748 status = open_fake_file(req, conn, req->vuid,
3749 fake_file_type, smb_fname,
3750 access_mask, &fsp);
3751 if (!NT_STATUS_IS_OK(status)) {
3752 goto fail;
3753 }
3754
3755 ZERO_STRUCT(smb_fname->st);
3756 goto done;
3757 }
3758
3759 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3760 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3761 goto fail;
3762 }
3763 }
3764
3765 /* All file access must go through check_name() */
3766
3767 status = check_name(conn, smb_fname->base_name);
3768 if (!NT_STATUS_IS_OK(status)) {
3769 goto fail;
3770 }
3771
3772 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3773 int ret;
3774 smb_fname->stream_name = NULL;
3775 /* We have to handle this error here. */
3776 if (create_options & FILE_DIRECTORY_FILE) {
3777 status = NT_STATUS_NOT_A_DIRECTORY;
3778 goto fail;
3779 }
3780 if (lp_posix_pathnames()) {
3781 ret = SMB_VFS_LSTAT(conn, smb_fname);
3782 } else {
3783 ret = SMB_VFS_STAT(conn, smb_fname);
3784 }
3785
3786 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3787 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3788 goto fail;
3789 }
3790 }
3791
3792 status = create_file_unixpath(
3793 conn, req, smb_fname, access_mask, share_access,
3794 create_disposition, create_options, file_attributes,
3795 oplock_request, allocation_size, private_flags,
3796 sd, ea_list,
3797 &fsp, &info);
3798
3799 if (!NT_STATUS_IS_OK(status)) {
3800 goto fail;
3801 }
3802
3803 done:
3804 DEBUG(10, ("create_file: info=%d\n", info));
3805
3806 *result = fsp;
3807 if (pinfo != NULL) {
3808 *pinfo = info;
3809 }
3810 return NT_STATUS_OK;
3811
3812 fail:
3813 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3814
3815 if (fsp != NULL) {
3816 close_file(req, fsp, ERROR_CLOSE);
3817 fsp = NULL;
3818 }
3819 return status;
3820 }
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