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Remove unused "struct security_descriptor" parameter from check_parent_access()
[Samba/id10ts.git] / source3 / smbd / open.c
blob6dab55d100f7fc830aaf58e29d517fabc0823168
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 struct smb_filename *smb_fname,
92 uint32_t access_mask)
93 {
94 /* Check if we have rights to open. */
95 NTSTATUS status;
96 struct security_descriptor *sd = NULL;
97 uint32_t rejected_share_access;
98 uint32_t rejected_mask = 0;
99
100 rejected_share_access = access_mask & ~(conn->share_access);
101
102 if (rejected_share_access) {
103 DEBUG(10, ("smbd_check_open_rights: rejected share access 0x%x "
104 "on %s (0x%x)\n",
105 (unsigned int)access_mask,
106 smb_fname_str_dbg(smb_fname),
107 (unsigned int)rejected_share_access ));
108 return NT_STATUS_ACCESS_DENIED;
109 }
110
111 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
112 DEBUG(10,("smbd_check_open_rights: not checking ACL "
113 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
114 smb_fname_str_dbg(smb_fname),
115 (unsigned int)access_mask ));
116 return NT_STATUS_OK;
117 }
118
119 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
120 (SECINFO_OWNER |
121 SECINFO_GROUP |
122 SECINFO_DACL),&sd);
123
124 if (!NT_STATUS_IS_OK(status)) {
125 DEBUG(10, ("smbd_check_open_rights: Could not get acl "
126 "on %s: %s\n",
127 smb_fname_str_dbg(smb_fname),
128 nt_errstr(status)));
129 return status;
130 }
131
132 status = smb1_file_se_access_check(conn,
133 sd,
134 get_current_nttok(conn),
135 access_mask,
136 &rejected_mask);
137
138 DEBUG(10,("smbd_check_open_rights: file %s requesting "
139 "0x%x returning 0x%x (%s)\n",
140 smb_fname_str_dbg(smb_fname),
141 (unsigned int)access_mask,
142 (unsigned int)rejected_mask,
143 nt_errstr(status) ));
144
145 if (!NT_STATUS_IS_OK(status)) {
146 if (DEBUGLEVEL >= 10) {
147 DEBUG(10,("smbd_check_open_rights: acl for %s is:\n",
148 smb_fname_str_dbg(smb_fname) ));
149 NDR_PRINT_DEBUG(security_descriptor, sd);
150 }
151 }
152
153 TALLOC_FREE(sd);
154
155 if (NT_STATUS_IS_OK(status) ||
156 !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
157 return status;
158 }
159
160 /* Here we know status == NT_STATUS_ACCESS_DENIED. */
161 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
162 (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
163 (lp_map_readonly(SNUM(conn)) ||
164 lp_map_archive(SNUM(conn)) ||
165 lp_map_hidden(SNUM(conn)) ||
166 lp_map_system(SNUM(conn)))) {
167 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
168
169 DEBUG(10,("smbd_check_open_rights: "
170 "overrode "
171 "FILE_WRITE_ATTRIBUTES "
172 "on file %s\n",
173 smb_fname_str_dbg(smb_fname)));
174 }
175
176 if (parent_override_delete(conn,
177 smb_fname,
178 access_mask,
179 rejected_mask)) {
180 /* Were we trying to do an open
181 * for delete and didn't get DELETE
182 * access (only) ? Check if the
183 * directory allows DELETE_CHILD.
184 * See here:
185 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
186 * for details. */
187
188 rejected_mask &= ~DELETE_ACCESS;
189
190 DEBUG(10,("smbd_check_open_rights: "
191 "overrode "
192 "DELETE_ACCESS on "
193 "file %s\n",
194 smb_fname_str_dbg(smb_fname)));
195 }
196
197 if (rejected_mask != 0) {
198 return NT_STATUS_ACCESS_DENIED;
199 } else {
200 return NT_STATUS_OK;
201 }
202 }
203
204 static NTSTATUS check_parent_access(struct connection_struct *conn,
205 struct smb_filename *smb_fname,
206 uint32_t access_mask,
207 char **pp_parent_dir)
208 {
209 NTSTATUS status;
210 char *parent_dir = NULL;
211 struct security_descriptor *parent_sd = NULL;
212 uint32_t access_granted = 0;
213
214 if (!parent_dirname(talloc_tos(),
215 smb_fname->base_name,
216 &parent_dir,
217 NULL)) {
218 return NT_STATUS_NO_MEMORY;
219 }
220
221 status = SMB_VFS_GET_NT_ACL(conn,
222 parent_dir,
223 SECINFO_DACL,
224 &parent_sd);
225
226 if (!NT_STATUS_IS_OK(status)) {
227 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
228 "%s with error %s\n",
229 parent_dir,
230 nt_errstr(status)));
231 return status;
232 }
233
234 status = smb1_file_se_access_check(conn,
235 parent_sd,
236 get_current_nttok(conn),
237 access_mask,
238 &access_granted);
239 if(!NT_STATUS_IS_OK(status)) {
240 DEBUG(5,("check_parent_access: access check "
241 "on directory %s for "
242 "path %s for mask 0x%x returned (0x%x) %s\n",
243 parent_dir,
244 smb_fname->base_name,
245 access_mask,
246 access_granted,
247 nt_errstr(status) ));
248 return status;
249 }
250
251 if (pp_parent_dir) {
252 *pp_parent_dir = parent_dir;
253 }
254 return NT_STATUS_OK;
255 }
256
257 /****************************************************************************
258 fd support routines - attempt to do a dos_open.
259 ****************************************************************************/
260
261 static NTSTATUS fd_open(struct connection_struct *conn,
262 files_struct *fsp,
263 int flags,
264 mode_t mode)
265 {
266 struct smb_filename *smb_fname = fsp->fsp_name;
267 NTSTATUS status = NT_STATUS_OK;
268
269 #ifdef O_NOFOLLOW
270 /*
271 * Never follow symlinks on a POSIX client. The
272 * client should be doing this.
273 */
274
275 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
276 flags |= O_NOFOLLOW;
277 }
278 #endif
279
280 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
281 if (fsp->fh->fd == -1) {
282 status = map_nt_error_from_unix(errno);
283 if (errno == EMFILE) {
284 static time_t last_warned = 0L;
285
286 if (time((time_t *) NULL) > last_warned) {
287 DEBUG(0,("Too many open files, unable "
288 "to open more! smbd's max "
289 "open files = %d\n",
290 lp_max_open_files()));
291 last_warned = time((time_t *) NULL);
292 }
293 }
294
295 }
296
297 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
298 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
299 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
300
301 return status;
302 }
303
304 /****************************************************************************
305 Close the file associated with a fsp.
306 ****************************************************************************/
307
308 NTSTATUS fd_close(files_struct *fsp)
309 {
310 int ret;
311
312 if (fsp->dptr) {
313 dptr_CloseDir(fsp);
314 }
315 if (fsp->fh->fd == -1) {
316 return NT_STATUS_OK; /* What we used to call a stat open. */
317 }
318 if (fsp->fh->ref_count > 1) {
319 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
320 }
321
322 ret = SMB_VFS_CLOSE(fsp);
323 fsp->fh->fd = -1;
324 if (ret == -1) {
325 return map_nt_error_from_unix(errno);
326 }
327 return NT_STATUS_OK;
328 }
329
330 /****************************************************************************
331 Change the ownership of a file to that of the parent directory.
332 Do this by fd if possible.
333 ****************************************************************************/
334
335 void change_file_owner_to_parent(connection_struct *conn,
336 const char *inherit_from_dir,
337 files_struct *fsp)
338 {
339 struct smb_filename *smb_fname_parent = NULL;
340 NTSTATUS status;
341 int ret;
342
343 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
344 NULL, NULL, &smb_fname_parent);
345 if (!NT_STATUS_IS_OK(status)) {
346 return;
347 }
348
349 ret = SMB_VFS_STAT(conn, smb_fname_parent);
350 if (ret == -1) {
351 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
352 "directory %s. Error was %s\n",
353 smb_fname_str_dbg(smb_fname_parent),
354 strerror(errno)));
355 TALLOC_FREE(smb_fname_parent);
356 return;
357 }
358
359 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
360 /* Already this uid - no need to change. */
361 DEBUG(10,("change_file_owner_to_parent: file %s "
362 "is already owned by uid %d\n",
363 fsp_str_dbg(fsp),
364 (int)fsp->fsp_name->st.st_ex_uid ));
365 TALLOC_FREE(smb_fname_parent);
366 return;
367 }
368
369 become_root();
370 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
371 unbecome_root();
372 if (ret == -1) {
373 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
374 "file %s to parent directory uid %u. Error "
375 "was %s\n", fsp_str_dbg(fsp),
376 (unsigned int)smb_fname_parent->st.st_ex_uid,
377 strerror(errno) ));
378 } else {
379 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
380 "parent directory uid %u.\n", fsp_str_dbg(fsp),
381 (unsigned int)smb_fname_parent->st.st_ex_uid));
382 /* Ensure the uid entry is updated. */
383 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
384 }
385
386 TALLOC_FREE(smb_fname_parent);
387 }
388
389 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
390 const char *inherit_from_dir,
391 const char *fname,
392 SMB_STRUCT_STAT *psbuf)
393 {
394 struct smb_filename *smb_fname_parent = NULL;
395 struct smb_filename *smb_fname_cwd = NULL;
396 char *saved_dir = NULL;
397 TALLOC_CTX *ctx = talloc_tos();
398 NTSTATUS status = NT_STATUS_OK;
399 int ret;
400
401 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
402 &smb_fname_parent);
403 if (!NT_STATUS_IS_OK(status)) {
404 return status;
405 }
406
407 ret = SMB_VFS_STAT(conn, smb_fname_parent);
408 if (ret == -1) {
409 status = map_nt_error_from_unix(errno);
410 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
411 "directory %s. Error was %s\n",
412 smb_fname_str_dbg(smb_fname_parent),
413 strerror(errno)));
414 goto out;
415 }
416
417 /* We've already done an lstat into psbuf, and we know it's a
418 directory. If we can cd into the directory and the dev/ino
419 are the same then we can safely chown without races as
420 we're locking the directory in place by being in it. This
421 should work on any UNIX (thanks tridge :-). JRA.
422 */
423
424 saved_dir = vfs_GetWd(ctx,conn);
425 if (!saved_dir) {
426 status = map_nt_error_from_unix(errno);
427 DEBUG(0,("change_dir_owner_to_parent: failed to get "
428 "current working directory. Error was %s\n",
429 strerror(errno)));
430 goto out;
431 }
432
433 /* Chdir into the new path. */
434 if (vfs_ChDir(conn, fname) == -1) {
435 status = map_nt_error_from_unix(errno);
436 DEBUG(0,("change_dir_owner_to_parent: failed to change "
437 "current working directory to %s. Error "
438 "was %s\n", fname, strerror(errno) ));
439 goto chdir;
440 }
441
442 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
443 &smb_fname_cwd);
444 if (!NT_STATUS_IS_OK(status)) {
445 return status;
446 }
447
448 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
449 if (ret == -1) {
450 status = map_nt_error_from_unix(errno);
451 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
452 "directory '.' (%s) Error was %s\n",
453 fname, strerror(errno)));
454 goto chdir;
455 }
456
457 /* Ensure we're pointing at the same place. */
458 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
459 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
460 DEBUG(0,("change_dir_owner_to_parent: "
461 "device/inode on directory %s changed. "
462 "Refusing to chown !\n", fname ));
463 status = NT_STATUS_ACCESS_DENIED;
464 goto chdir;
465 }
466
467 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
468 /* Already this uid - no need to change. */
469 DEBUG(10,("change_dir_owner_to_parent: directory %s "
470 "is already owned by uid %d\n",
471 fname,
472 (int)smb_fname_cwd->st.st_ex_uid ));
473 status = NT_STATUS_OK;
474 goto chdir;
475 }
476
477 become_root();
478 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
479 (gid_t)-1);
480 unbecome_root();
481 if (ret == -1) {
482 status = map_nt_error_from_unix(errno);
483 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
484 "directory %s to parent directory uid %u. "
485 "Error was %s\n", fname,
486 (unsigned int)smb_fname_parent->st.st_ex_uid,
487 strerror(errno) ));
488 } else {
489 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
490 "directory %s to parent directory uid %u.\n",
491 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
492 /* Ensure the uid entry is updated. */
493 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
494 }
495
496 chdir:
497 vfs_ChDir(conn,saved_dir);
498 out:
499 TALLOC_FREE(smb_fname_parent);
500 TALLOC_FREE(smb_fname_cwd);
501 return status;
502 }
503
504 /****************************************************************************
505 Open a file.
506 ****************************************************************************/
507
508 static NTSTATUS open_file(files_struct *fsp,
509 connection_struct *conn,
510 struct smb_request *req,
511 const char *parent_dir,
512 int flags,
513 mode_t unx_mode,
514 uint32 access_mask, /* client requested access mask. */
515 uint32 open_access_mask) /* what we're actually using in the open. */
516 {
517 struct smb_filename *smb_fname = fsp->fsp_name;
518 NTSTATUS status = NT_STATUS_OK;
519 int accmode = (flags & O_ACCMODE);
520 int local_flags = flags;
521 bool file_existed = VALID_STAT(fsp->fsp_name->st);
522 bool file_created = false;
523
524 fsp->fh->fd = -1;
525 errno = EPERM;
526
527 /* Check permissions */
528
529 /*
530 * This code was changed after seeing a client open request
531 * containing the open mode of (DENY_WRITE/read-only) with
532 * the 'create if not exist' bit set. The previous code
533 * would fail to open the file read only on a read-only share
534 * as it was checking the flags parameter directly against O_RDONLY,
535 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
536 * JRA.
537 */
538
539 if (!CAN_WRITE(conn)) {
540 /* It's a read-only share - fail if we wanted to write. */
541 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
542 DEBUG(3,("Permission denied opening %s\n",
543 smb_fname_str_dbg(smb_fname)));
544 return NT_STATUS_ACCESS_DENIED;
545 } else if(flags & O_CREAT) {
546 /* We don't want to write - but we must make sure that
547 O_CREAT doesn't create the file if we have write
548 access into the directory.
549 */
550 flags &= ~(O_CREAT|O_EXCL);
551 local_flags &= ~(O_CREAT|O_EXCL);
552 }
553 }
554
555 /*
556 * This little piece of insanity is inspired by the
557 * fact that an NT client can open a file for O_RDONLY,
558 * but set the create disposition to FILE_EXISTS_TRUNCATE.
559 * If the client *can* write to the file, then it expects to
560 * truncate the file, even though it is opening for readonly.
561 * Quicken uses this stupid trick in backup file creation...
562 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
563 * for helping track this one down. It didn't bite us in 2.0.x
564 * as we always opened files read-write in that release. JRA.
565 */
566
567 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
568 DEBUG(10,("open_file: truncate requested on read-only open "
569 "for file %s\n", smb_fname_str_dbg(smb_fname)));
570 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
571 }
572
573 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
574 (!file_existed && (local_flags & O_CREAT)) ||
575 ((local_flags & O_TRUNC) == O_TRUNC) ) {
576 const char *wild;
577
578 /*
579 * We can't actually truncate here as the file may be locked.
580 * open_file_ntcreate will take care of the truncate later. JRA.
581 */
582
583 local_flags &= ~O_TRUNC;
584
585 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
586 /*
587 * We would block on opening a FIFO with no one else on the
588 * other end. Do what we used to do and add O_NONBLOCK to the
589 * open flags. JRA.
590 */
591
592 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
593 local_flags |= O_NONBLOCK;
594 }
595 #endif
596
597 /* Don't create files with Microsoft wildcard characters. */
598 if (fsp->base_fsp) {
599 /*
600 * wildcard characters are allowed in stream names
601 * only test the basefilename
602 */
603 wild = fsp->base_fsp->fsp_name->base_name;
604 } else {
605 wild = smb_fname->base_name;
606 }
607 if ((local_flags & O_CREAT) && !file_existed &&
608 ms_has_wild(wild)) {
609 return NT_STATUS_OBJECT_NAME_INVALID;
610 }
611
612 /* Can we access this file ? */
613 if (!fsp->base_fsp) {
614 /* Only do this check on non-stream open. */
615 if (file_existed) {
616 status = smbd_check_open_rights(conn,
617 smb_fname,
618 access_mask);
619 } else if (local_flags & O_CREAT){
620 status = check_parent_access(conn,
621 smb_fname,
622 SEC_DIR_ADD_FILE,
623 NULL);
624 } else {
625 /* File didn't exist and no O_CREAT. */
626 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
627 }
628 if (!NT_STATUS_IS_OK(status)) {
629 DEBUG(10,("open_file: "
630 "%s on file "
631 "%s returned %s\n",
632 file_existed ?
633 "smbd_check_open_rights" :
634 "check_parent_access",
635 smb_fname_str_dbg(smb_fname),
636 nt_errstr(status) ));
637 return status;
638 }
639 }
640
641 /* Actually do the open */
642 status = fd_open(conn, fsp, local_flags, unx_mode);
643 if (!NT_STATUS_IS_OK(status)) {
644 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
645 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
646 nt_errstr(status),local_flags,flags));
647 return status;
648 }
649
650 if ((local_flags & O_CREAT) && !file_existed) {
651 file_created = true;
652 }
653
654 } else {
655 fsp->fh->fd = -1; /* What we used to call a stat open. */
656 if (!file_existed) {
657 /* File must exist for a stat open. */
658 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
659 }
660
661 status = smbd_check_open_rights(conn,
662 smb_fname,
663 access_mask);
664
665 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
666 fsp->posix_open &&
667 S_ISLNK(smb_fname->st.st_ex_mode)) {
668 /* This is a POSIX stat open for delete
669 * or rename on a symlink that points
670 * nowhere. Allow. */
671 DEBUG(10,("open_file: allowing POSIX "
672 "open on bad symlink %s\n",
673 smb_fname_str_dbg(smb_fname)));
674 status = NT_STATUS_OK;
675 }
676
677 if (!NT_STATUS_IS_OK(status)) {
678 DEBUG(10,("open_file: "
679 "smbd_check_open_rights on file "
680 "%s returned %s\n",
681 smb_fname_str_dbg(smb_fname),
682 nt_errstr(status) ));
683 return status;
684 }
685 }
686
687 if (!file_existed) {
688 int ret;
689
690 if (fsp->fh->fd == -1) {
691 ret = SMB_VFS_STAT(conn, smb_fname);
692 } else {
693 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
694 /* If we have an fd, this stat should succeed. */
695 if (ret == -1) {
696 DEBUG(0,("Error doing fstat on open file %s "
697 "(%s)\n",
698 smb_fname_str_dbg(smb_fname),
699 strerror(errno) ));
700 }
701 }
702
703 /* For a non-io open, this stat failing means file not found. JRA */
704 if (ret == -1) {
705 status = map_nt_error_from_unix(errno);
706 fd_close(fsp);
707 return status;
708 }
709
710 if (file_created) {
711 bool need_re_stat = false;
712 /* Do all inheritance work after we've
713 done a successful stat call and filled
714 in the stat struct in fsp->fsp_name. */
715
716 /* Inherit the ACL if required */
717 if (lp_inherit_perms(SNUM(conn))) {
718 inherit_access_posix_acl(conn, parent_dir,
719 smb_fname->base_name,
720 unx_mode);
721 need_re_stat = true;
722 }
723
724 /* Change the owner if required. */
725 if (lp_inherit_owner(SNUM(conn))) {
726 change_file_owner_to_parent(conn, parent_dir,
727 fsp);
728 need_re_stat = true;
729 }
730
731 if (need_re_stat) {
732 if (fsp->fh->fd == -1) {
733 ret = SMB_VFS_STAT(conn, smb_fname);
734 } else {
735 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
736 /* If we have an fd, this stat should succeed. */
737 if (ret == -1) {
738 DEBUG(0,("Error doing fstat on open file %s "
739 "(%s)\n",
740 smb_fname_str_dbg(smb_fname),
741 strerror(errno) ));
742 }
743 }
744 }
745
746 notify_fname(conn, NOTIFY_ACTION_ADDED,
747 FILE_NOTIFY_CHANGE_FILE_NAME,
748 smb_fname->base_name);
749 }
750 }
751
752 /*
753 * POSIX allows read-only opens of directories. We don't
754 * want to do this (we use a different code path for this)
755 * so catch a directory open and return an EISDIR. JRA.
756 */
757
758 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
759 fd_close(fsp);
760 errno = EISDIR;
761 return NT_STATUS_FILE_IS_A_DIRECTORY;
762 }
763
764 fsp->mode = smb_fname->st.st_ex_mode;
765 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
766 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
767 fsp->file_pid = req ? req->smbpid : 0;
768 fsp->can_lock = True;
769 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
770 if (!CAN_WRITE(conn)) {
771 fsp->can_write = False;
772 } else {
773 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
774 True : False;
775 }
776 fsp->print_file = NULL;
777 fsp->modified = False;
778 fsp->sent_oplock_break = NO_BREAK_SENT;
779 fsp->is_directory = False;
780 if (conn->aio_write_behind_list &&
781 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
782 conn->case_sensitive)) {
783 fsp->aio_write_behind = True;
784 }
785
786 fsp->wcp = NULL; /* Write cache pointer. */
787
788 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
789 conn->session_info->unix_info->unix_name,
790 smb_fname_str_dbg(smb_fname),
791 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
792 conn->num_files_open));
793
794 errno = 0;
795 return NT_STATUS_OK;
796 }
797
798 /****************************************************************************
799 Check if we can open a file with a share mode.
800 Returns True if conflict, False if not.
801 ****************************************************************************/
802
803 static bool share_conflict(struct share_mode_entry *entry,
804 uint32 access_mask,
805 uint32 share_access)
806 {
807 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
808 "entry->share_access = 0x%x, "
809 "entry->private_options = 0x%x\n",
810 (unsigned int)entry->access_mask,
811 (unsigned int)entry->share_access,
812 (unsigned int)entry->private_options));
813
814 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
815 (unsigned int)access_mask, (unsigned int)share_access));
816
817 if ((entry->access_mask & (FILE_WRITE_DATA|
818 FILE_APPEND_DATA|
819 FILE_READ_DATA|
820 FILE_EXECUTE|
821 DELETE_ACCESS)) == 0) {
822 DEBUG(10,("share_conflict: No conflict due to "
823 "entry->access_mask = 0x%x\n",
824 (unsigned int)entry->access_mask ));
825 return False;
826 }
827
828 if ((access_mask & (FILE_WRITE_DATA|
829 FILE_APPEND_DATA|
830 FILE_READ_DATA|
831 FILE_EXECUTE|
832 DELETE_ACCESS)) == 0) {
833 DEBUG(10,("share_conflict: No conflict due to "
834 "access_mask = 0x%x\n",
835 (unsigned int)access_mask ));
836 return False;
837 }
838
839 #if 1 /* JRA TEST - Superdebug. */
840 #define CHECK_MASK(num, am, right, sa, share) \
841 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
842 (unsigned int)(num), (unsigned int)(am), \
843 (unsigned int)(right), (unsigned int)(am)&(right) )); \
844 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
845 (unsigned int)(num), (unsigned int)(sa), \
846 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
847 if (((am) & (right)) && !((sa) & (share))) { \
848 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
849 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
850 (unsigned int)(share) )); \
851 return True; \
852 }
853 #else
854 #define CHECK_MASK(num, am, right, sa, share) \
855 if (((am) & (right)) && !((sa) & (share))) { \
856 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
857 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
858 (unsigned int)(share) )); \
859 return True; \
860 }
861 #endif
862
863 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
864 share_access, FILE_SHARE_WRITE);
865 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
866 entry->share_access, FILE_SHARE_WRITE);
867
868 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
869 share_access, FILE_SHARE_READ);
870 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
871 entry->share_access, FILE_SHARE_READ);
872
873 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
874 share_access, FILE_SHARE_DELETE);
875 CHECK_MASK(6, access_mask, DELETE_ACCESS,
876 entry->share_access, FILE_SHARE_DELETE);
877
878 DEBUG(10,("share_conflict: No conflict.\n"));
879 return False;
880 }
881
882 #if defined(DEVELOPER)
883 static void validate_my_share_entries(struct smbd_server_connection *sconn,
884 int num,
885 struct share_mode_entry *share_entry)
886 {
887 files_struct *fsp;
888
889 if (!procid_is_me(&share_entry->pid)) {
890 return;
891 }
892
893 if (is_deferred_open_entry(share_entry) &&
894 !open_was_deferred(sconn, share_entry->op_mid)) {
895 char *str = talloc_asprintf(talloc_tos(),
896 "Got a deferred entry without a request: "
897 "PANIC: %s\n",
898 share_mode_str(talloc_tos(), num, share_entry));
899 smb_panic(str);
900 }
901
902 if (!is_valid_share_mode_entry(share_entry)) {
903 return;
904 }
905
906 fsp = file_find_dif(sconn, share_entry->id,
907 share_entry->share_file_id);
908 if (!fsp) {
909 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
910 share_mode_str(talloc_tos(), num, share_entry) ));
911 smb_panic("validate_my_share_entries: Cannot match a "
912 "share entry with an open file\n");
913 }
914
915 if (is_deferred_open_entry(share_entry) ||
916 is_unused_share_mode_entry(share_entry)) {
917 goto panic;
918 }
919
920 if ((share_entry->op_type == NO_OPLOCK) &&
921 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
922 /* Someone has already written to it, but I haven't yet
923 * noticed */
924 return;
925 }
926
927 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
928 goto panic;
929 }
930
931 return;
932
933 panic:
934 {
935 char *str;
936 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
937 share_mode_str(talloc_tos(), num, share_entry) ));
938 str = talloc_asprintf(talloc_tos(),
939 "validate_my_share_entries: "
940 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
941 fsp->fsp_name->base_name,
942 (unsigned int)fsp->oplock_type,
943 (unsigned int)share_entry->op_type );
944 smb_panic(str);
945 }
946 }
947 #endif
948
949 bool is_stat_open(uint32 access_mask)
950 {
951 return (access_mask &&
952 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
953 FILE_WRITE_ATTRIBUTES))==0) &&
954 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
955 FILE_WRITE_ATTRIBUTES)) != 0));
956 }
957
958 /****************************************************************************
959 Deal with share modes
960 Invarient: Share mode must be locked on entry and exit.
961 Returns -1 on error, or number of share modes on success (may be zero).
962 ****************************************************************************/
963
964 static NTSTATUS open_mode_check(connection_struct *conn,
965 struct share_mode_lock *lck,
966 uint32_t name_hash,
967 uint32 access_mask,
968 uint32 share_access,
969 uint32 create_options,
970 bool *file_existed)
971 {
972 int i;
973
974 if(lck->num_share_modes == 0) {
975 return NT_STATUS_OK;
976 }
977
978 *file_existed = True;
979
980 /* A delete on close prohibits everything */
981
982 if (is_delete_on_close_set(lck, name_hash)) {
983 return NT_STATUS_DELETE_PENDING;
984 }
985
986 if (is_stat_open(access_mask)) {
987 /* Stat open that doesn't trigger oplock breaks or share mode
988 * checks... ! JRA. */
989 return NT_STATUS_OK;
990 }
991
992 /*
993 * Check if the share modes will give us access.
994 */
995
996 #if defined(DEVELOPER)
997 for(i = 0; i < lck->num_share_modes; i++) {
998 validate_my_share_entries(conn->sconn, i,
999 &lck->share_modes[i]);
1000 }
1001 #endif
1002
1003 if (!lp_share_modes(SNUM(conn))) {
1004 return NT_STATUS_OK;
1005 }
1006
1007 /* Now we check the share modes, after any oplock breaks. */
1008 for(i = 0; i < lck->num_share_modes; i++) {
1009
1010 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1011 continue;
1012 }
1013
1014 /* someone else has a share lock on it, check to see if we can
1015 * too */
1016 if (share_conflict(&lck->share_modes[i],
1017 access_mask, share_access)) {
1018 return NT_STATUS_SHARING_VIOLATION;
1019 }
1020 }
1021
1022 return NT_STATUS_OK;
1023 }
1024
1025 static bool is_delete_request(files_struct *fsp) {
1026 return ((fsp->access_mask == DELETE_ACCESS) &&
1027 (fsp->oplock_type == NO_OPLOCK));
1028 }
1029
1030 /*
1031 * Send a break message to the oplock holder and delay the open for
1032 * our client.
1033 */
1034
1035 static NTSTATUS send_break_message(files_struct *fsp,
1036 struct share_mode_entry *exclusive,
1037 uint64_t mid,
1038 int oplock_request)
1039 {
1040 NTSTATUS status;
1041 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1042
1043 DEBUG(10, ("Sending break request to PID %s\n",
1044 procid_str_static(&exclusive->pid)));
1045 exclusive->op_mid = mid;
1046
1047 /* Create the message. */
1048 share_mode_entry_to_message(msg, exclusive);
1049
1050 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1051 don't want this set in the share mode struct pointed to by lck. */
1052
1053 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1054 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1055 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1056 }
1057
1058 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1059 MSG_SMB_BREAK_REQUEST,
1060 (uint8 *)msg,
1061 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1062 if (!NT_STATUS_IS_OK(status)) {
1063 DEBUG(3, ("Could not send oplock break message: %s\n",
1064 nt_errstr(status)));
1065 }
1066
1067 return status;
1068 }
1069
1070 /*
1071 * Return share_mode_entry pointers for :
1072 * 1). Batch oplock entry.
1073 * 2). Batch or exclusive oplock entry (may be identical to #1).
1074 * bool have_level2_oplock
1075 * bool have_no_oplock.
1076 * Do internal consistency checks on the share mode for a file.
1077 */
1078
1079 static void find_oplock_types(files_struct *fsp,
1080 int oplock_request,
1081 struct share_mode_lock *lck,
1082 struct share_mode_entry **pp_batch,
1083 struct share_mode_entry **pp_ex_or_batch,
1084 bool *got_level2,
1085 bool *got_no_oplock)
1086 {
1087 int i;
1088
1089 *pp_batch = NULL;
1090 *pp_ex_or_batch = NULL;
1091 *got_level2 = false;
1092 *got_no_oplock = false;
1093
1094 /* Ignore stat or internal opens, as is done in
1095 delay_for_batch_oplocks() and
1096 delay_for_exclusive_oplocks().
1097 */
1098 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1099 return;
1100 }
1101
1102 for (i=0; i<lck->num_share_modes; i++) {
1103 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1104 continue;
1105 }
1106
1107 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1108 is_stat_open(lck->share_modes[i].access_mask)) {
1109 /* We ignore stat opens in the table - they
1110 always have NO_OPLOCK and never get or
1111 cause breaks. JRA. */
1112 continue;
1113 }
1114
1115 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1116 /* batch - can only be one. */
1117 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1118 smb_panic("Bad batch oplock entry.");
1119 }
1120 *pp_batch = &lck->share_modes[i];
1121 }
1122
1123 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1124 /* Exclusive or batch - can only be one. */
1125 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1126 smb_panic("Bad exclusive or batch oplock entry.");
1127 }
1128 *pp_ex_or_batch = &lck->share_modes[i];
1129 }
1130
1131 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1132 if (*pp_batch || *pp_ex_or_batch) {
1133 smb_panic("Bad levelII oplock entry.");
1134 }
1135 *got_level2 = true;
1136 }
1137
1138 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1139 if (*pp_batch || *pp_ex_or_batch) {
1140 smb_panic("Bad no oplock entry.");
1141 }
1142 *got_no_oplock = true;
1143 }
1144 }
1145 }
1146
1147 static bool delay_for_batch_oplocks(files_struct *fsp,
1148 uint64_t mid,
1149 int oplock_request,
1150 struct share_mode_entry *batch_entry)
1151 {
1152 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1153 return false;
1154 }
1155
1156 if (batch_entry != NULL) {
1157 /* Found a batch oplock */
1158 send_break_message(fsp, batch_entry, mid, oplock_request);
1159 return true;
1160 }
1161 return false;
1162 }
1163
1164 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1165 uint64_t mid,
1166 int oplock_request,
1167 struct share_mode_entry *ex_entry)
1168 {
1169 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1170 return false;
1171 }
1172
1173 if (ex_entry != NULL) {
1174 /* Found an exclusive or batch oplock */
1175 bool delay_it = is_delete_request(fsp) ?
1176 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1177 if (delay_it) {
1178 send_break_message(fsp, ex_entry, mid, oplock_request);
1179 return true;
1180 }
1181 }
1182 return false;
1183 }
1184
1185 static void grant_fsp_oplock_type(files_struct *fsp,
1186 const struct byte_range_lock *br_lck,
1187 int oplock_request,
1188 bool got_level2_oplock,
1189 bool got_a_none_oplock)
1190 {
1191 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1192 lp_level2_oplocks(SNUM(fsp->conn));
1193
1194 /* Start by granting what the client asked for,
1195 but ensure no SAMBA_PRIVATE bits can be set. */
1196 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1197
1198 if (oplock_request & INTERNAL_OPEN_ONLY) {
1199 /* No oplocks on internal open. */
1200 fsp->oplock_type = NO_OPLOCK;
1201 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1202 fsp->oplock_type, fsp_str_dbg(fsp)));
1203 return;
1204 } else if (br_lck && br_lck->num_locks > 0) {
1205 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1206 fsp_str_dbg(fsp)));
1207 fsp->oplock_type = NO_OPLOCK;
1208 }
1209
1210 if (is_stat_open(fsp->access_mask)) {
1211 /* Leave the value already set. */
1212 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1213 fsp->oplock_type, fsp_str_dbg(fsp)));
1214 return;
1215 }
1216
1217 /*
1218 * Match what was requested (fsp->oplock_type) with
1219 * what was found in the existing share modes.
1220 */
1221
1222 if (got_a_none_oplock) {
1223 fsp->oplock_type = NO_OPLOCK;
1224 } else if (got_level2_oplock) {
1225 if (fsp->oplock_type == NO_OPLOCK ||
1226 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1227 /* Store a level2 oplock, but don't tell the client */
1228 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1229 } else {
1230 fsp->oplock_type = LEVEL_II_OPLOCK;
1231 }
1232 } else {
1233 /* All share_mode_entries are placeholders or deferred.
1234 * Silently upgrade to fake levelII if the client didn't
1235 * ask for an oplock. */
1236 if (fsp->oplock_type == NO_OPLOCK) {
1237 /* Store a level2 oplock, but don't tell the client */
1238 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1239 }
1240 }
1241
1242 /*
1243 * Don't grant level2 to clients that don't want them
1244 * or if we've turned them off.
1245 */
1246 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1247 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1248 }
1249
1250 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1251 fsp->oplock_type, fsp_str_dbg(fsp)));
1252 }
1253
1254 bool request_timed_out(struct timeval request_time,
1255 struct timeval timeout)
1256 {
1257 struct timeval now, end_time;
1258 GetTimeOfDay(&now);
1259 end_time = timeval_sum(&request_time, &timeout);
1260 return (timeval_compare(&end_time, &now) < 0);
1261 }
1262
1263 /****************************************************************************
1264 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1265 ****************************************************************************/
1266
1267 static void defer_open(struct share_mode_lock *lck,
1268 struct timeval request_time,
1269 struct timeval timeout,
1270 struct smb_request *req,
1271 struct deferred_open_record *state)
1272 {
1273 int i;
1274
1275 /* Paranoia check */
1276
1277 for (i=0; i<lck->num_share_modes; i++) {
1278 struct share_mode_entry *e = &lck->share_modes[i];
1279
1280 if (!is_deferred_open_entry(e)) {
1281 continue;
1282 }
1283
1284 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1285 DEBUG(0, ("Trying to defer an already deferred "
1286 "request: mid=%llu, exiting\n",
1287 (unsigned long long)req->mid));
1288 exit_server("attempt to defer a deferred request");
1289 }
1290 }
1291
1292 /* End paranoia check */
1293
1294 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1295 "open entry for mid %llu\n",
1296 (unsigned int)request_time.tv_sec,
1297 (unsigned int)request_time.tv_usec,
1298 (unsigned long long)req->mid));
1299
1300 if (!push_deferred_open_message_smb(req, request_time, timeout,
1301 state->id, (char *)state, sizeof(*state))) {
1302 exit_server("push_deferred_open_message_smb failed");
1303 }
1304 add_deferred_open(lck, req->mid, request_time,
1305 sconn_server_id(req->sconn), state->id);
1306 }
1307
1308
1309 /****************************************************************************
1310 On overwrite open ensure that the attributes match.
1311 ****************************************************************************/
1312
1313 bool open_match_attributes(connection_struct *conn,
1314 uint32 old_dos_attr,
1315 uint32 new_dos_attr,
1316 mode_t existing_unx_mode,
1317 mode_t new_unx_mode,
1318 mode_t *returned_unx_mode)
1319 {
1320 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1321
1322 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1323 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1324
1325 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1326 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1327 *returned_unx_mode = new_unx_mode;
1328 } else {
1329 *returned_unx_mode = (mode_t)0;
1330 }
1331
1332 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1333 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1334 "returned_unx_mode = 0%o\n",
1335 (unsigned int)old_dos_attr,
1336 (unsigned int)existing_unx_mode,
1337 (unsigned int)new_dos_attr,
1338 (unsigned int)*returned_unx_mode ));
1339
1340 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1341 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1342 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1343 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1344 return False;
1345 }
1346 }
1347 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1348 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1349 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1350 return False;
1351 }
1352 }
1353 return True;
1354 }
1355
1356 /****************************************************************************
1357 Special FCB or DOS processing in the case of a sharing violation.
1358 Try and find a duplicated file handle.
1359 ****************************************************************************/
1360
1361 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1362 connection_struct *conn,
1363 files_struct *fsp_to_dup_into,
1364 const struct smb_filename *smb_fname,
1365 struct file_id id,
1366 uint16 file_pid,
1367 uint16 vuid,
1368 uint32 access_mask,
1369 uint32 share_access,
1370 uint32 create_options)
1371 {
1372 files_struct *fsp;
1373
1374 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1375 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1376
1377 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1378 fsp = file_find_di_next(fsp)) {
1379
1380 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1381 "vuid = %u, file_pid = %u, private_options = 0x%x "
1382 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1383 fsp->fh->fd, (unsigned int)fsp->vuid,
1384 (unsigned int)fsp->file_pid,
1385 (unsigned int)fsp->fh->private_options,
1386 (unsigned int)fsp->access_mask ));
1387
1388 if (fsp->fh->fd != -1 &&
1389 fsp->vuid == vuid &&
1390 fsp->file_pid == file_pid &&
1391 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1392 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1393 (fsp->access_mask & FILE_WRITE_DATA) &&
1394 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1395 strequal(fsp->fsp_name->stream_name,
1396 smb_fname->stream_name)) {
1397 DEBUG(10,("fcb_or_dos_open: file match\n"));
1398 break;
1399 }
1400 }
1401
1402 if (!fsp) {
1403 return NT_STATUS_NOT_FOUND;
1404 }
1405
1406 /* quite an insane set of semantics ... */
1407 if (is_executable(smb_fname->base_name) &&
1408 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1409 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1410 return NT_STATUS_INVALID_PARAMETER;
1411 }
1412
1413 /* We need to duplicate this fsp. */
1414 return dup_file_fsp(req, fsp, access_mask, share_access,
1415 create_options, fsp_to_dup_into);
1416 }
1417
1418 static void schedule_defer_open(struct share_mode_lock *lck,
1419 struct timeval request_time,
1420 struct smb_request *req)
1421 {
1422 struct deferred_open_record state;
1423
1424 /* This is a relative time, added to the absolute
1425 request_time value to get the absolute timeout time.
1426 Note that if this is the second or greater time we enter
1427 this codepath for this particular request mid then
1428 request_time is left as the absolute time of the *first*
1429 time this request mid was processed. This is what allows
1430 the request to eventually time out. */
1431
1432 struct timeval timeout;
1433
1434 /* Normally the smbd we asked should respond within
1435 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1436 * the client did, give twice the timeout as a safety
1437 * measure here in case the other smbd is stuck
1438 * somewhere else. */
1439
1440 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1441
1442 /* Nothing actually uses state.delayed_for_oplocks
1443 but it's handy to differentiate in debug messages
1444 between a 30 second delay due to oplock break, and
1445 a 1 second delay for share mode conflicts. */
1446
1447 state.delayed_for_oplocks = True;
1448 state.id = lck->id;
1449
1450 if (!request_timed_out(request_time, timeout)) {
1451 defer_open(lck, request_time, timeout, req, &state);
1452 }
1453 }
1454
1455 /****************************************************************************
1456 Work out what access_mask to use from what the client sent us.
1457 ****************************************************************************/
1458
1459 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1460 const struct smb_filename *smb_fname,
1461 bool file_existed,
1462 uint32_t access_mask,
1463 uint32_t *access_mask_out)
1464 {
1465 NTSTATUS status;
1466 uint32_t orig_access_mask = access_mask;
1467 uint32_t rejected_share_access;
1468
1469 /*
1470 * Convert GENERIC bits to specific bits.
1471 */
1472
1473 se_map_generic(&access_mask, &file_generic_mapping);
1474
1475 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1476 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1477 if (file_existed) {
1478
1479 struct security_descriptor *sd;
1480 uint32_t access_granted = 0;
1481
1482 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1483 (SECINFO_OWNER |
1484 SECINFO_GROUP |
1485 SECINFO_DACL),&sd);
1486
1487 if (!NT_STATUS_IS_OK(status)) {
1488 DEBUG(10,("smbd_calculate_access_mask: "
1489 "Could not get acl on file %s: %s\n",
1490 smb_fname_str_dbg(smb_fname),
1491 nt_errstr(status)));
1492 return NT_STATUS_ACCESS_DENIED;
1493 }
1494
1495 status = smb1_file_se_access_check(conn,
1496 sd,
1497 get_current_nttok(conn),
1498 access_mask,
1499 &access_granted);
1500
1501 TALLOC_FREE(sd);
1502
1503 if (!NT_STATUS_IS_OK(status)) {
1504 DEBUG(10, ("smbd_calculate_access_mask: "
1505 "Access denied on file %s: "
1506 "when calculating maximum access\n",
1507 smb_fname_str_dbg(smb_fname)));
1508 return NT_STATUS_ACCESS_DENIED;
1509 }
1510
1511 access_mask = access_granted;
1512 } else {
1513 access_mask = FILE_GENERIC_ALL;
1514 }
1515
1516 access_mask &= conn->share_access;
1517 }
1518
1519 rejected_share_access = access_mask & ~(conn->share_access);
1520
1521 if (rejected_share_access) {
1522 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1523 "file %s: rejected by share access mask[0x%08X] "
1524 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1525 smb_fname_str_dbg(smb_fname),
1526 conn->share_access,
1527 orig_access_mask, access_mask,
1528 rejected_share_access));
1529 return NT_STATUS_ACCESS_DENIED;
1530 }
1531
1532 *access_mask_out = access_mask;
1533 return NT_STATUS_OK;
1534 }
1535
1536 /****************************************************************************
1537 Remove the deferred open entry under lock.
1538 ****************************************************************************/
1539
1540 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1541 struct server_id pid)
1542 {
1543 struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1544 NULL, NULL, NULL);
1545 if (lck == NULL) {
1546 DEBUG(0, ("could not get share mode lock\n"));
1547 } else {
1548 del_deferred_open_entry(lck, mid, pid);
1549 TALLOC_FREE(lck);
1550 }
1551 }
1552
1553 /****************************************************************
1554 Ensure we get the brlock lock followed by the share mode lock
1555 in the correct order to prevent deadlocks if other smbd's are
1556 using the brlock database on this file simultaneously with this open
1557 (that code also gets the locks in brlock -> share mode lock order).
1558 ****************************************************************/
1559
1560 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1561 files_struct *fsp,
1562 const struct file_id id,
1563 const char *connectpath,
1564 const struct smb_filename *smb_fname,
1565 const struct timespec *p_old_write_time,
1566 struct share_mode_lock **p_lck,
1567 struct byte_range_lock **p_br_lck)
1568 {
1569 /* Ordering - we must get the br_lck for this
1570 file before the share mode. */
1571 if (lp_locking(fsp->conn->params)) {
1572 *p_br_lck = brl_get_locks_readonly(fsp);
1573 if (*p_br_lck == NULL) {
1574 DEBUG(0, ("Could not get br_lock\n"));
1575 return false;
1576 }
1577 /* Note - we don't need to free the returned
1578 br_lck explicitly as it was allocated on talloc_tos()
1579 and so will be autofreed (and release the lock)
1580 once the frame context disappears.
1581
1582 If it was set to fsp->brlock_rec then it was
1583 talloc_move'd to hang off the fsp pointer and
1584 in this case is guarenteed to not be holding the
1585 lock on the brlock database. */
1586 }
1587
1588 *p_lck = get_share_mode_lock(mem_ctx,
1589 id,
1590 connectpath,
1591 smb_fname,
1592 p_old_write_time);
1593
1594 if (*p_lck == NULL) {
1595 DEBUG(0, ("Could not get share mode lock\n"));
1596 TALLOC_FREE(*p_br_lck);
1597 return false;
1598 }
1599 return true;
1600 }
1601
1602 /****************************************************************************
1603 Open a file with a share mode. Passed in an already created files_struct *.
1604 ****************************************************************************/
1605
1606 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1607 struct smb_request *req,
1608 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1609 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1610 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1611 uint32 create_options, /* options such as delete on close. */
1612 uint32 new_dos_attributes, /* attributes used for new file. */
1613 int oplock_request, /* internal Samba oplock codes. */
1614 /* Information (FILE_EXISTS etc.) */
1615 uint32_t private_flags, /* Samba specific flags. */
1616 int *pinfo,
1617 files_struct *fsp)
1618 {
1619 struct smb_filename *smb_fname = fsp->fsp_name;
1620 int flags=0;
1621 int flags2=0;
1622 bool file_existed = VALID_STAT(smb_fname->st);
1623 bool def_acl = False;
1624 bool posix_open = False;
1625 bool new_file_created = False;
1626 bool clear_ads = false;
1627 struct file_id id;
1628 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1629 mode_t new_unx_mode = (mode_t)0;
1630 mode_t unx_mode = (mode_t)0;
1631 int info;
1632 uint32 existing_dos_attributes = 0;
1633 struct timeval request_time = timeval_zero();
1634 struct share_mode_lock *lck = NULL;
1635 uint32 open_access_mask = access_mask;
1636 NTSTATUS status;
1637 char *parent_dir;
1638
1639 ZERO_STRUCT(id);
1640
1641 if (conn->printer) {
1642 /*
1643 * Printers are handled completely differently.
1644 * Most of the passed parameters are ignored.
1645 */
1646
1647 if (pinfo) {
1648 *pinfo = FILE_WAS_CREATED;
1649 }
1650
1651 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1652 smb_fname_str_dbg(smb_fname)));
1653
1654 if (!req) {
1655 DEBUG(0,("open_file_ntcreate: printer open without "
1656 "an SMB request!\n"));
1657 return NT_STATUS_INTERNAL_ERROR;
1658 }
1659
1660 return print_spool_open(fsp, smb_fname->base_name,
1661 req->vuid);
1662 }
1663
1664 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1665 NULL)) {
1666 return NT_STATUS_NO_MEMORY;
1667 }
1668
1669 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1670 posix_open = True;
1671 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1672 new_dos_attributes = 0;
1673 } else {
1674 /* Windows allows a new file to be created and
1675 silently removes a FILE_ATTRIBUTE_DIRECTORY
1676 sent by the client. Do the same. */
1677
1678 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1679
1680 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1681 * created new. */
1682 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1683 smb_fname, parent_dir);
1684 }
1685
1686 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1687 "access_mask=0x%x share_access=0x%x "
1688 "create_disposition = 0x%x create_options=0x%x "
1689 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1690 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1691 access_mask, share_access, create_disposition,
1692 create_options, (unsigned int)unx_mode, oplock_request,
1693 (unsigned int)private_flags));
1694
1695 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1696 DEBUG(0, ("No smb request but not an internal only open!\n"));
1697 return NT_STATUS_INTERNAL_ERROR;
1698 }
1699
1700 /*
1701 * Only non-internal opens can be deferred at all
1702 */
1703
1704 if (req) {
1705 void *ptr;
1706 if (get_deferred_open_message_state(req,
1707 &request_time,
1708 &ptr)) {
1709
1710 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1711 /* Remember the absolute time of the original
1712 request with this mid. We'll use it later to
1713 see if this has timed out. */
1714
1715 /* Remove the deferred open entry under lock. */
1716 remove_deferred_open_entry(
1717 state->id, req->mid,
1718 sconn_server_id(req->sconn));
1719
1720 /* Ensure we don't reprocess this message. */
1721 remove_deferred_open_message_smb(req->sconn, req->mid);
1722 }
1723 }
1724
1725 status = check_name(conn, smb_fname->base_name);
1726 if (!NT_STATUS_IS_OK(status)) {
1727 return status;
1728 }
1729
1730 if (!posix_open) {
1731 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1732 if (file_existed) {
1733 existing_dos_attributes = dos_mode(conn, smb_fname);
1734 }
1735 }
1736
1737 /* ignore any oplock requests if oplocks are disabled */
1738 if (!lp_oplocks(SNUM(conn)) ||
1739 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1740 /* Mask off everything except the private Samba bits. */
1741 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1742 }
1743
1744 /* this is for OS/2 long file names - say we don't support them */
1745 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1746 /* OS/2 Workplace shell fix may be main code stream in a later
1747 * release. */
1748 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1749 "supported.\n"));
1750 if (use_nt_status()) {
1751 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1752 }
1753 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1754 }
1755
1756 switch( create_disposition ) {
1757 /*
1758 * Currently we're using FILE_SUPERSEDE as the same as
1759 * FILE_OVERWRITE_IF but they really are
1760 * different. FILE_SUPERSEDE deletes an existing file
1761 * (requiring delete access) then recreates it.
1762 */
1763 case FILE_SUPERSEDE:
1764 /* If file exists replace/overwrite. If file doesn't
1765 * exist create. */
1766 flags2 |= (O_CREAT | O_TRUNC);
1767 clear_ads = true;
1768 break;
1769
1770 case FILE_OVERWRITE_IF:
1771 /* If file exists replace/overwrite. If file doesn't
1772 * exist create. */
1773 flags2 |= (O_CREAT | O_TRUNC);
1774 clear_ads = true;
1775 break;
1776
1777 case FILE_OPEN:
1778 /* If file exists open. If file doesn't exist error. */
1779 if (!file_existed) {
1780 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1781 "requested for file %s and file "
1782 "doesn't exist.\n",
1783 smb_fname_str_dbg(smb_fname)));
1784 errno = ENOENT;
1785 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1786 }
1787 break;
1788
1789 case FILE_OVERWRITE:
1790 /* If file exists overwrite. If file doesn't exist
1791 * error. */
1792 if (!file_existed) {
1793 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1794 "requested for file %s and file "
1795 "doesn't exist.\n",
1796 smb_fname_str_dbg(smb_fname) ));
1797 errno = ENOENT;
1798 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1799 }
1800 flags2 |= O_TRUNC;
1801 clear_ads = true;
1802 break;
1803
1804 case FILE_CREATE:
1805 /* If file exists error. If file doesn't exist
1806 * create. */
1807 if (file_existed) {
1808 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1809 "requested for file %s and file "
1810 "already exists.\n",
1811 smb_fname_str_dbg(smb_fname)));
1812 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1813 errno = EISDIR;
1814 } else {
1815 errno = EEXIST;
1816 }
1817 return map_nt_error_from_unix(errno);
1818 }
1819 flags2 |= (O_CREAT|O_EXCL);
1820 break;
1821
1822 case FILE_OPEN_IF:
1823 /* If file exists open. If file doesn't exist
1824 * create. */
1825 flags2 |= O_CREAT;
1826 break;
1827
1828 default:
1829 return NT_STATUS_INVALID_PARAMETER;
1830 }
1831
1832 /* We only care about matching attributes on file exists and
1833 * overwrite. */
1834
1835 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1836 (create_disposition == FILE_OVERWRITE_IF))) {
1837 if (!open_match_attributes(conn, existing_dos_attributes,
1838 new_dos_attributes,
1839 smb_fname->st.st_ex_mode,
1840 unx_mode, &new_unx_mode)) {
1841 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1842 "for file %s (%x %x) (0%o, 0%o)\n",
1843 smb_fname_str_dbg(smb_fname),
1844 existing_dos_attributes,
1845 new_dos_attributes,
1846 (unsigned int)smb_fname->st.st_ex_mode,
1847 (unsigned int)unx_mode ));
1848 errno = EACCES;
1849 return NT_STATUS_ACCESS_DENIED;
1850 }
1851 }
1852
1853 status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1854 access_mask,
1855 &access_mask);
1856 if (!NT_STATUS_IS_OK(status)) {
1857 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1858 "on file %s returned %s\n",
1859 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1860 return status;
1861 }
1862
1863 open_access_mask = access_mask;
1864
1865 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1866 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1867 }
1868
1869 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1870 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1871 access_mask));
1872
1873 /*
1874 * Note that we ignore the append flag as append does not
1875 * mean the same thing under DOS and Unix.
1876 */
1877
1878 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1879 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1880 /* DENY_DOS opens are always underlying read-write on the
1881 file handle, no matter what the requested access mask
1882 says. */
1883 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1884 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1885 flags = O_RDWR;
1886 } else {
1887 flags = O_WRONLY;
1888 }
1889 } else {
1890 flags = O_RDONLY;
1891 }
1892
1893 /*
1894 * Currently we only look at FILE_WRITE_THROUGH for create options.
1895 */
1896
1897 #if defined(O_SYNC)
1898 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1899 flags2 |= O_SYNC;
1900 }
1901 #endif /* O_SYNC */
1902
1903 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1904 flags2 |= O_APPEND;
1905 }
1906
1907 if (!posix_open && !CAN_WRITE(conn)) {
1908 /*
1909 * We should really return a permission denied error if either
1910 * O_CREAT or O_TRUNC are set, but for compatibility with
1911 * older versions of Samba we just AND them out.
1912 */
1913 flags2 &= ~(O_CREAT|O_TRUNC);
1914 }
1915
1916 /*
1917 * Ensure we can't write on a read-only share or file.
1918 */
1919
1920 if (flags != O_RDONLY && file_existed &&
1921 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1922 DEBUG(5,("open_file_ntcreate: write access requested for "
1923 "file %s on read only %s\n",
1924 smb_fname_str_dbg(smb_fname),
1925 !CAN_WRITE(conn) ? "share" : "file" ));
1926 errno = EACCES;
1927 return NT_STATUS_ACCESS_DENIED;
1928 }
1929
1930 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1931 fsp->share_access = share_access;
1932 fsp->fh->private_options = private_flags;
1933 fsp->access_mask = open_access_mask; /* We change this to the
1934 * requested access_mask after
1935 * the open is done. */
1936 fsp->posix_open = posix_open;
1937
1938 /* Ensure no SAMBA_PRIVATE bits can be set. */
1939 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1940
1941 if (timeval_is_zero(&request_time)) {
1942 request_time = fsp->open_time;
1943 }
1944
1945 if (file_existed) {
1946 struct byte_range_lock *br_lck = NULL;
1947 struct share_mode_entry *batch_entry = NULL;
1948 struct share_mode_entry *exclusive_entry = NULL;
1949 bool got_level2_oplock = false;
1950 bool got_a_none_oplock = false;
1951
1952 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1953 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1954
1955 if (!acquire_ordered_locks(talloc_tos(),
1956 fsp,
1957 id,
1958 conn->connectpath,
1959 smb_fname,
1960 &old_write_time,
1961 &lck,
1962 &br_lck)) {
1963 return NT_STATUS_SHARING_VIOLATION;
1964 }
1965
1966 /* Get the types we need to examine. */
1967 find_oplock_types(fsp,
1968 oplock_request,
1969 lck,
1970 &batch_entry,
1971 &exclusive_entry,
1972 &got_level2_oplock,
1973 &got_a_none_oplock);
1974
1975 /* First pass - send break only on batch oplocks. */
1976 if ((req != NULL) &&
1977 delay_for_batch_oplocks(fsp,
1978 req->mid,
1979 oplock_request,
1980 batch_entry)) {
1981 schedule_defer_open(lck, request_time, req);
1982 TALLOC_FREE(lck);
1983 return NT_STATUS_SHARING_VIOLATION;
1984 }
1985
1986 /* Use the client requested access mask here, not the one we
1987 * open with. */
1988 status = open_mode_check(conn, lck, fsp->name_hash,
1989 access_mask, share_access,
1990 create_options, &file_existed);
1991
1992 if (NT_STATUS_IS_OK(status)) {
1993 /* We might be going to allow this open. Check oplock
1994 * status again. */
1995 /* Second pass - send break for both batch or
1996 * exclusive oplocks. */
1997 if ((req != NULL) &&
1998 delay_for_exclusive_oplocks(
1999 fsp,
2000 req->mid,
2001 oplock_request,
2002 exclusive_entry)) {
2003 schedule_defer_open(lck, request_time, req);
2004 TALLOC_FREE(lck);
2005 return NT_STATUS_SHARING_VIOLATION;
2006 }
2007 }
2008
2009 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2010 /* DELETE_PENDING is not deferred for a second */
2011 TALLOC_FREE(lck);
2012 return status;
2013 }
2014
2015 grant_fsp_oplock_type(fsp,
2016 br_lck,
2017 oplock_request,
2018 got_level2_oplock,
2019 got_a_none_oplock);
2020
2021 if (!NT_STATUS_IS_OK(status)) {
2022 uint32 can_access_mask;
2023 bool can_access = True;
2024
2025 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2026
2027 /* Check if this can be done with the deny_dos and fcb
2028 * calls. */
2029 if (private_flags &
2030 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2031 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2032 if (req == NULL) {
2033 DEBUG(0, ("DOS open without an SMB "
2034 "request!\n"));
2035 TALLOC_FREE(lck);
2036 return NT_STATUS_INTERNAL_ERROR;
2037 }
2038
2039 /* Use the client requested access mask here,
2040 * not the one we open with. */
2041 status = fcb_or_dos_open(req,
2042 conn,
2043 fsp,
2044 smb_fname,
2045 id,
2046 req->smbpid,
2047 req->vuid,
2048 access_mask,
2049 share_access,
2050 create_options);
2051
2052 if (NT_STATUS_IS_OK(status)) {
2053 TALLOC_FREE(lck);
2054 if (pinfo) {
2055 *pinfo = FILE_WAS_OPENED;
2056 }
2057 return NT_STATUS_OK;
2058 }
2059 }
2060
2061 /*
2062 * This next line is a subtlety we need for
2063 * MS-Access. If a file open will fail due to share
2064 * permissions and also for security (access) reasons,
2065 * we need to return the access failed error, not the
2066 * share error. We can't open the file due to kernel
2067 * oplock deadlock (it's possible we failed above on
2068 * the open_mode_check()) so use a userspace check.
2069 */
2070
2071 if (flags & O_RDWR) {
2072 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2073 } else if (flags & O_WRONLY) {
2074 can_access_mask = FILE_WRITE_DATA;
2075 } else {
2076 can_access_mask = FILE_READ_DATA;
2077 }
2078
2079 if (((can_access_mask & FILE_WRITE_DATA) &&
2080 !CAN_WRITE(conn)) ||
2081 !can_access_file_data(conn, smb_fname,
2082 can_access_mask)) {
2083 can_access = False;
2084 }
2085
2086 /*
2087 * If we're returning a share violation, ensure we
2088 * cope with the braindead 1 second delay.
2089 */
2090
2091 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2092 lp_defer_sharing_violations()) {
2093 struct timeval timeout;
2094 struct deferred_open_record state;
2095 int timeout_usecs;
2096
2097 /* this is a hack to speed up torture tests
2098 in 'make test' */
2099 timeout_usecs = lp_parm_int(SNUM(conn),
2100 "smbd","sharedelay",
2101 SHARING_VIOLATION_USEC_WAIT);
2102
2103 /* This is a relative time, added to the absolute
2104 request_time value to get the absolute timeout time.
2105 Note that if this is the second or greater time we enter
2106 this codepath for this particular request mid then
2107 request_time is left as the absolute time of the *first*
2108 time this request mid was processed. This is what allows
2109 the request to eventually time out. */
2110
2111 timeout = timeval_set(0, timeout_usecs);
2112
2113 /* Nothing actually uses state.delayed_for_oplocks
2114 but it's handy to differentiate in debug messages
2115 between a 30 second delay due to oplock break, and
2116 a 1 second delay for share mode conflicts. */
2117
2118 state.delayed_for_oplocks = False;
2119 state.id = id;
2120
2121 if ((req != NULL)
2122 && !request_timed_out(request_time,
2123 timeout)) {
2124 defer_open(lck, request_time, timeout,
2125 req, &state);
2126 }
2127 }
2128
2129 TALLOC_FREE(lck);
2130 if (can_access) {
2131 /*
2132 * We have detected a sharing violation here
2133 * so return the correct error code
2134 */
2135 status = NT_STATUS_SHARING_VIOLATION;
2136 } else {
2137 status = NT_STATUS_ACCESS_DENIED;
2138 }
2139 return status;
2140 }
2141
2142 /*
2143 * We exit this block with the share entry *locked*.....
2144 */
2145 }
2146
2147 SMB_ASSERT(!file_existed || (lck != NULL));
2148
2149 /*
2150 * Ensure we pay attention to default ACLs on directories if required.
2151 */
2152
2153 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2154 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2155 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2156 }
2157
2158 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2159 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2160 (unsigned int)flags, (unsigned int)flags2,
2161 (unsigned int)unx_mode, (unsigned int)access_mask,
2162 (unsigned int)open_access_mask));
2163
2164 /*
2165 * open_file strips any O_TRUNC flags itself.
2166 */
2167
2168 fsp_open = open_file(fsp, conn, req, parent_dir,
2169 flags|flags2, unx_mode, access_mask,
2170 open_access_mask);
2171
2172 if (!NT_STATUS_IS_OK(fsp_open)) {
2173 TALLOC_FREE(lck);
2174 return fsp_open;
2175 }
2176
2177 if (!file_existed) {
2178 struct byte_range_lock *br_lck = NULL;
2179 struct share_mode_entry *batch_entry = NULL;
2180 struct share_mode_entry *exclusive_entry = NULL;
2181 bool got_level2_oplock = false;
2182 bool got_a_none_oplock = false;
2183 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2184 /*
2185 * Deal with the race condition where two smbd's detect the
2186 * file doesn't exist and do the create at the same time. One
2187 * of them will win and set a share mode, the other (ie. this
2188 * one) should check if the requested share mode for this
2189 * create is allowed.
2190 */
2191
2192 /*
2193 * Now the file exists and fsp is successfully opened,
2194 * fsp->dev and fsp->inode are valid and should replace the
2195 * dev=0,inode=0 from a non existent file. Spotted by
2196 * Nadav Danieli <nadavd@exanet.com>. JRA.
2197 */
2198
2199 id = fsp->file_id;
2200
2201 if (!acquire_ordered_locks(talloc_tos(),
2202 fsp,
2203 id,
2204 conn->connectpath,
2205 smb_fname,
2206 &old_write_time,
2207 &lck,
2208 &br_lck)) {
2209 return NT_STATUS_SHARING_VIOLATION;
2210 }
2211
2212 /* Get the types we need to examine. */
2213 find_oplock_types(fsp,
2214 oplock_request,
2215 lck,
2216 &batch_entry,
2217 &exclusive_entry,
2218 &got_level2_oplock,
2219 &got_a_none_oplock);
2220
2221 /* First pass - send break only on batch oplocks. */
2222 if ((req != NULL) &&
2223 delay_for_batch_oplocks(fsp,
2224 req->mid,
2225 oplock_request,
2226 batch_entry)) {
2227 schedule_defer_open(lck, request_time, req);
2228 TALLOC_FREE(lck);
2229 fd_close(fsp);
2230 return NT_STATUS_SHARING_VIOLATION;
2231 }
2232
2233 status = open_mode_check(conn, lck, fsp->name_hash,
2234 access_mask, share_access,
2235 create_options, &file_existed);
2236
2237 if (NT_STATUS_IS_OK(status)) {
2238 /* We might be going to allow this open. Check oplock
2239 * status again. */
2240 /* Second pass - send break for both batch or
2241 * exclusive oplocks. */
2242 if ((req != NULL) &&
2243 delay_for_exclusive_oplocks(
2244 fsp,
2245 req->mid,
2246 oplock_request,
2247 exclusive_entry)) {
2248 schedule_defer_open(lck, request_time, req);
2249 TALLOC_FREE(lck);
2250 fd_close(fsp);
2251 return NT_STATUS_SHARING_VIOLATION;
2252 }
2253 }
2254
2255 if (!NT_STATUS_IS_OK(status)) {
2256 struct deferred_open_record state;
2257
2258 state.delayed_for_oplocks = False;
2259 state.id = id;
2260
2261 /* Do it all over again immediately. In the second
2262 * round we will find that the file existed and handle
2263 * the DELETE_PENDING and FCB cases correctly. No need
2264 * to duplicate the code here. Essentially this is a
2265 * "goto top of this function", but don't tell
2266 * anybody... */
2267
2268 if (req != NULL) {
2269 defer_open(lck, request_time, timeval_zero(),
2270 req, &state);
2271 }
2272 TALLOC_FREE(lck);
2273 fd_close(fsp);
2274 return status;
2275 }
2276
2277 grant_fsp_oplock_type(fsp,
2278 br_lck,
2279 oplock_request,
2280 got_level2_oplock,
2281 got_a_none_oplock);
2282
2283 /*
2284 * We exit this block with the share entry *locked*.....
2285 */
2286
2287 }
2288
2289 SMB_ASSERT(lck != NULL);
2290
2291 /* Delete streams if create_disposition requires it */
2292 if (file_existed && clear_ads &&
2293 !is_ntfs_stream_smb_fname(smb_fname)) {
2294 status = delete_all_streams(conn, smb_fname->base_name);
2295 if (!NT_STATUS_IS_OK(status)) {
2296 TALLOC_FREE(lck);
2297 fd_close(fsp);
2298 return status;
2299 }
2300 }
2301
2302 /* note that we ignore failure for the following. It is
2303 basically a hack for NFS, and NFS will never set one of
2304 these only read them. Nobody but Samba can ever set a deny
2305 mode and we have already checked our more authoritative
2306 locking database for permission to set this deny mode. If
2307 the kernel refuses the operations then the kernel is wrong.
2308 note that GPFS supports it as well - jmcd */
2309
2310 if (fsp->fh->fd != -1) {
2311 int ret_flock;
2312 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2313 if(ret_flock == -1 ){
2314
2315 TALLOC_FREE(lck);
2316 fd_close(fsp);
2317
2318 return NT_STATUS_SHARING_VIOLATION;
2319 }
2320 }
2321
2322 /*
2323 * At this point onwards, we can guarentee that the share entry
2324 * is locked, whether we created the file or not, and that the
2325 * deny mode is compatible with all current opens.
2326 */
2327
2328 /*
2329 * If requested, truncate the file.
2330 */
2331
2332 if (file_existed && (flags2&O_TRUNC)) {
2333 /*
2334 * We are modifing the file after open - update the stat
2335 * struct..
2336 */
2337 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2338 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2339 status = map_nt_error_from_unix(errno);
2340 TALLOC_FREE(lck);
2341 fd_close(fsp);
2342 return status;
2343 }
2344 }
2345
2346 /*
2347 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2348 * but we don't have to store this - just ignore it on access check.
2349 */
2350 if (conn->sconn->using_smb2) {
2351 /*
2352 * SMB2 doesn't return it (according to Microsoft tests).
2353 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2354 * File created with access = 0x7 (Read, Write, Delete)
2355 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2356 */
2357 fsp->access_mask = access_mask;
2358 } else {
2359 /* But SMB1 does. */
2360 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2361 }
2362
2363 if (file_existed) {
2364 /* stat opens on existing files don't get oplocks. */
2365 if (is_stat_open(open_access_mask)) {
2366 fsp->oplock_type = NO_OPLOCK;
2367 }
2368
2369 if (!(flags2 & O_TRUNC)) {
2370 info = FILE_WAS_OPENED;
2371 } else {
2372 info = FILE_WAS_OVERWRITTEN;
2373 }
2374 } else {
2375 info = FILE_WAS_CREATED;
2376 }
2377
2378 if (pinfo) {
2379 *pinfo = info;
2380 }
2381
2382 /*
2383 * Setup the oplock info in both the shared memory and
2384 * file structs.
2385 */
2386
2387 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2388 /*
2389 * Could not get the kernel oplock or there are byte-range
2390 * locks on the file.
2391 */
2392 fsp->oplock_type = NO_OPLOCK;
2393 }
2394
2395 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2396 new_file_created = True;
2397 }
2398
2399 set_share_mode(lck, fsp, get_current_uid(conn),
2400 req ? req->mid : 0,
2401 fsp->oplock_type);
2402
2403 /* Handle strange delete on close create semantics. */
2404 if (create_options & FILE_DELETE_ON_CLOSE) {
2405
2406 status = can_set_delete_on_close(fsp, new_dos_attributes);
2407
2408 if (!NT_STATUS_IS_OK(status)) {
2409 /* Remember to delete the mode we just added. */
2410 del_share_mode(lck, fsp);
2411 TALLOC_FREE(lck);
2412 fd_close(fsp);
2413 return status;
2414 }
2415 /* Note that here we set the *inital* delete on close flag,
2416 not the regular one. The magic gets handled in close. */
2417 fsp->initial_delete_on_close = True;
2418 }
2419
2420 if (new_file_created) {
2421 /* Files should be initially set as archive */
2422 if (lp_map_archive(SNUM(conn)) ||
2423 lp_store_dos_attributes(SNUM(conn))) {
2424 if (!posix_open) {
2425 if (file_set_dosmode(conn, smb_fname,
2426 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2427 parent_dir, true) == 0) {
2428 unx_mode = smb_fname->st.st_ex_mode;
2429 }
2430 }
2431 }
2432 }
2433
2434 /* Determine sparse flag. */
2435 if (posix_open) {
2436 /* POSIX opens are sparse by default. */
2437 fsp->is_sparse = true;
2438 } else {
2439 fsp->is_sparse = (file_existed &&
2440 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2441 }
2442
2443 /*
2444 * Take care of inherited ACLs on created files - if default ACL not
2445 * selected.
2446 */
2447
2448 if (!posix_open && !file_existed && !def_acl) {
2449
2450 int saved_errno = errno; /* We might get ENOSYS in the next
2451 * call.. */
2452
2453 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2454 errno == ENOSYS) {
2455 errno = saved_errno; /* Ignore ENOSYS */
2456 }
2457
2458 } else if (new_unx_mode) {
2459
2460 int ret = -1;
2461
2462 /* Attributes need changing. File already existed. */
2463
2464 {
2465 int saved_errno = errno; /* We might get ENOSYS in the
2466 * next call.. */
2467 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2468
2469 if (ret == -1 && errno == ENOSYS) {
2470 errno = saved_errno; /* Ignore ENOSYS */
2471 } else {
2472 DEBUG(5, ("open_file_ntcreate: reset "
2473 "attributes of file %s to 0%o\n",
2474 smb_fname_str_dbg(smb_fname),
2475 (unsigned int)new_unx_mode));
2476 ret = 0; /* Don't do the fchmod below. */
2477 }
2478 }
2479
2480 if ((ret == -1) &&
2481 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2482 DEBUG(5, ("open_file_ntcreate: failed to reset "
2483 "attributes of file %s to 0%o\n",
2484 smb_fname_str_dbg(smb_fname),
2485 (unsigned int)new_unx_mode));
2486 }
2487
2488 /* If this is a successful open, we must remove any deferred open
2489 * records. */
2490 if (req != NULL) {
2491 del_deferred_open_entry(lck, req->mid,
2492 sconn_server_id(req->sconn));
2493 }
2494 TALLOC_FREE(lck);
2495
2496 return NT_STATUS_OK;
2497 }
2498
2499
2500 /****************************************************************************
2501 Open a file for for write to ensure that we can fchmod it.
2502 ****************************************************************************/
2503
2504 NTSTATUS open_file_fchmod(connection_struct *conn,
2505 struct smb_filename *smb_fname,
2506 files_struct **result)
2507 {
2508 if (!VALID_STAT(smb_fname->st)) {
2509 return NT_STATUS_INVALID_PARAMETER;
2510 }
2511
2512 return SMB_VFS_CREATE_FILE(
2513 conn, /* conn */
2514 NULL, /* req */
2515 0, /* root_dir_fid */
2516 smb_fname, /* fname */
2517 FILE_WRITE_DATA, /* access_mask */
2518 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2519 FILE_SHARE_DELETE),
2520 FILE_OPEN, /* create_disposition*/
2521 0, /* create_options */
2522 0, /* file_attributes */
2523 INTERNAL_OPEN_ONLY, /* oplock_request */
2524 0, /* allocation_size */
2525 0, /* private_flags */
2526 NULL, /* sd */
2527 NULL, /* ea_list */
2528 result, /* result */
2529 NULL); /* pinfo */
2530 }
2531
2532 static NTSTATUS mkdir_internal(connection_struct *conn,
2533 struct smb_filename *smb_dname,
2534 uint32 file_attributes)
2535 {
2536 mode_t mode;
2537 char *parent_dir = NULL;
2538 NTSTATUS status;
2539 bool posix_open = false;
2540 bool need_re_stat = false;
2541 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2542
2543 if(access_mask & ~(conn->share_access)) {
2544 DEBUG(5,("mkdir_internal: failing share access "
2545 "%s\n", lp_servicename(SNUM(conn))));
2546 return NT_STATUS_ACCESS_DENIED;
2547 }
2548
2549 status = check_name(conn, smb_dname->base_name);
2550 if (!NT_STATUS_IS_OK(status)) {
2551 return status;
2552 }
2553
2554 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2555 NULL)) {
2556 return NT_STATUS_NO_MEMORY;
2557 }
2558
2559 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2560 posix_open = true;
2561 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2562 } else {
2563 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2564 }
2565
2566 status = check_parent_access(conn,
2567 smb_dname,
2568 access_mask,
2569 &parent_dir);
2570 if(!NT_STATUS_IS_OK(status)) {
2571 DEBUG(5,("mkdir_internal: check_parent_access "
2572 "on directory %s for path %s returned %s\n",
2573 parent_dir,
2574 smb_dname->base_name,
2575 nt_errstr(status) ));
2576 return status;
2577 }
2578
2579 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2580 return map_nt_error_from_unix(errno);
2581 }
2582
2583 /* Ensure we're checking for a symlink here.... */
2584 /* We don't want to get caught by a symlink racer. */
2585
2586 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2587 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2588 smb_fname_str_dbg(smb_dname), strerror(errno)));
2589 return map_nt_error_from_unix(errno);
2590 }
2591
2592 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2593 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2594 smb_fname_str_dbg(smb_dname)));
2595 return NT_STATUS_NOT_A_DIRECTORY;
2596 }
2597
2598 if (lp_store_dos_attributes(SNUM(conn))) {
2599 if (!posix_open) {
2600 file_set_dosmode(conn, smb_dname,
2601 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2602 parent_dir, true);
2603 }
2604 }
2605
2606 if (lp_inherit_perms(SNUM(conn))) {
2607 inherit_access_posix_acl(conn, parent_dir,
2608 smb_dname->base_name, mode);
2609 need_re_stat = true;
2610 }
2611
2612 if (!posix_open) {
2613 /*
2614 * Check if high bits should have been set,
2615 * then (if bits are missing): add them.
2616 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2617 * dir.
2618 */
2619 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2620 (mode & ~smb_dname->st.st_ex_mode)) {
2621 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2622 (smb_dname->st.st_ex_mode |
2623 (mode & ~smb_dname->st.st_ex_mode)));
2624 need_re_stat = true;
2625 }
2626 }
2627
2628 /* Change the owner if required. */
2629 if (lp_inherit_owner(SNUM(conn))) {
2630 change_dir_owner_to_parent(conn, parent_dir,
2631 smb_dname->base_name,
2632 &smb_dname->st);
2633 need_re_stat = true;
2634 }
2635
2636 if (need_re_stat) {
2637 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2638 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2639 smb_fname_str_dbg(smb_dname), strerror(errno)));
2640 return map_nt_error_from_unix(errno);
2641 }
2642 }
2643
2644 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2645 smb_dname->base_name);
2646
2647 return NT_STATUS_OK;
2648 }
2649
2650 /****************************************************************************
2651 Ensure we didn't get symlink raced on opening a directory.
2652 ****************************************************************************/
2653
2654 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2655 const SMB_STRUCT_STAT *sbuf2)
2656 {
2657 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2658 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2659 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2660 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2661 return false;
2662 }
2663 return true;
2664 }
2665
2666 /****************************************************************************
2667 Open a directory from an NT SMB call.
2668 ****************************************************************************/
2669
2670 static NTSTATUS open_directory(connection_struct *conn,
2671 struct smb_request *req,
2672 struct smb_filename *smb_dname,
2673 uint32 access_mask,
2674 uint32 share_access,
2675 uint32 create_disposition,
2676 uint32 create_options,
2677 uint32 file_attributes,
2678 int *pinfo,
2679 files_struct **result)
2680 {
2681 files_struct *fsp = NULL;
2682 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2683 struct share_mode_lock *lck = NULL;
2684 NTSTATUS status;
2685 struct timespec mtimespec;
2686 int info = 0;
2687
2688 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2689
2690 /* Ensure we have a directory attribute. */
2691 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2692
2693 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2694 "share_access = 0x%x create_options = 0x%x, "
2695 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2696 smb_fname_str_dbg(smb_dname),
2697 (unsigned int)access_mask,
2698 (unsigned int)share_access,
2699 (unsigned int)create_options,
2700 (unsigned int)create_disposition,
2701 (unsigned int)file_attributes));
2702
2703 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2704 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2705 is_ntfs_stream_smb_fname(smb_dname)) {
2706 DEBUG(2, ("open_directory: %s is a stream name!\n",
2707 smb_fname_str_dbg(smb_dname)));
2708 return NT_STATUS_NOT_A_DIRECTORY;
2709 }
2710
2711 status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2712 access_mask, &access_mask);
2713 if (!NT_STATUS_IS_OK(status)) {
2714 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2715 "on file %s returned %s\n",
2716 smb_fname_str_dbg(smb_dname),
2717 nt_errstr(status)));
2718 return status;
2719 }
2720
2721 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2722 !security_token_has_privilege(get_current_nttok(conn),
2723 SEC_PRIV_SECURITY)) {
2724 DEBUG(10, ("open_directory: open on %s "
2725 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2726 smb_fname_str_dbg(smb_dname)));
2727 return NT_STATUS_PRIVILEGE_NOT_HELD;
2728 }
2729
2730 switch( create_disposition ) {
2731 case FILE_OPEN:
2732
2733 if (!dir_existed) {
2734 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2735 }
2736
2737 info = FILE_WAS_OPENED;
2738 break;
2739
2740 case FILE_CREATE:
2741
2742 /* If directory exists error. If directory doesn't
2743 * exist create. */
2744
2745 if (dir_existed) {
2746 status = NT_STATUS_OBJECT_NAME_COLLISION;
2747 DEBUG(2, ("open_directory: unable to create "
2748 "%s. Error was %s\n",
2749 smb_fname_str_dbg(smb_dname),
2750 nt_errstr(status)));
2751 return status;
2752 }
2753
2754 status = mkdir_internal(conn, smb_dname,
2755 file_attributes);
2756
2757 if (!NT_STATUS_IS_OK(status)) {
2758 DEBUG(2, ("open_directory: unable to create "
2759 "%s. Error was %s\n",
2760 smb_fname_str_dbg(smb_dname),
2761 nt_errstr(status)));
2762 return status;
2763 }
2764
2765 info = FILE_WAS_CREATED;
2766 break;
2767
2768 case FILE_OPEN_IF:
2769 /*
2770 * If directory exists open. If directory doesn't
2771 * exist create.
2772 */
2773
2774 if (dir_existed) {
2775 status = NT_STATUS_OK;
2776 info = FILE_WAS_OPENED;
2777 } else {
2778 status = mkdir_internal(conn, smb_dname,
2779 file_attributes);
2780
2781 if (NT_STATUS_IS_OK(status)) {
2782 info = FILE_WAS_CREATED;
2783 } else {
2784 /* Cope with create race. */
2785 if (!NT_STATUS_EQUAL(status,
2786 NT_STATUS_OBJECT_NAME_COLLISION)) {
2787 DEBUG(2, ("open_directory: unable to create "
2788 "%s. Error was %s\n",
2789 smb_fname_str_dbg(smb_dname),
2790 nt_errstr(status)));
2791 return status;
2792 }
2793 info = FILE_WAS_OPENED;
2794 }
2795 }
2796
2797 break;
2798
2799 case FILE_SUPERSEDE:
2800 case FILE_OVERWRITE:
2801 case FILE_OVERWRITE_IF:
2802 default:
2803 DEBUG(5,("open_directory: invalid create_disposition "
2804 "0x%x for directory %s\n",
2805 (unsigned int)create_disposition,
2806 smb_fname_str_dbg(smb_dname)));
2807 return NT_STATUS_INVALID_PARAMETER;
2808 }
2809
2810 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2811 DEBUG(5,("open_directory: %s is not a directory !\n",
2812 smb_fname_str_dbg(smb_dname)));
2813 return NT_STATUS_NOT_A_DIRECTORY;
2814 }
2815
2816 if (info == FILE_WAS_OPENED) {
2817 status = smbd_check_open_rights(conn, smb_dname, access_mask);
2818 if (!NT_STATUS_IS_OK(status)) {
2819 DEBUG(10, ("open_directory: smbd_check_open_rights on "
2820 "file %s failed with %s\n",
2821 smb_fname_str_dbg(smb_dname),
2822 nt_errstr(status)));
2823 return status;
2824 }
2825 }
2826
2827 status = file_new(req, conn, &fsp);
2828 if(!NT_STATUS_IS_OK(status)) {
2829 return status;
2830 }
2831
2832 /*
2833 * Setup the files_struct for it.
2834 */
2835
2836 fsp->mode = smb_dname->st.st_ex_mode;
2837 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2838 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2839 fsp->file_pid = req ? req->smbpid : 0;
2840 fsp->can_lock = False;
2841 fsp->can_read = False;
2842 fsp->can_write = False;
2843
2844 fsp->share_access = share_access;
2845 fsp->fh->private_options = 0;
2846 /*
2847 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2848 */
2849 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2850 fsp->print_file = NULL;
2851 fsp->modified = False;
2852 fsp->oplock_type = NO_OPLOCK;
2853 fsp->sent_oplock_break = NO_BREAK_SENT;
2854 fsp->is_directory = True;
2855 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2856 status = fsp_set_smb_fname(fsp, smb_dname);
2857 if (!NT_STATUS_IS_OK(status)) {
2858 file_free(req, fsp);
2859 return status;
2860 }
2861
2862 mtimespec = smb_dname->st.st_ex_mtime;
2863
2864 #ifdef O_DIRECTORY
2865 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2866 #else
2867 /* POSIX allows us to open a directory with O_RDONLY. */
2868 status = fd_open(conn, fsp, O_RDONLY, 0);
2869 #endif
2870 if (!NT_STATUS_IS_OK(status)) {
2871 DEBUG(5, ("open_directory: Could not open fd for "
2872 "%s (%s)\n",
2873 smb_fname_str_dbg(smb_dname),
2874 nt_errstr(status)));
2875 file_free(req, fsp);
2876 return status;
2877 }
2878
2879 status = vfs_stat_fsp(fsp);
2880 if (!NT_STATUS_IS_OK(status)) {
2881 fd_close(fsp);
2882 file_free(req, fsp);
2883 return status;
2884 }
2885
2886 /* Ensure there was no race condition. */
2887 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2888 DEBUG(5,("open_directory: stat struct differs for "
2889 "directory %s.\n",
2890 smb_fname_str_dbg(smb_dname)));
2891 fd_close(fsp);
2892 file_free(req, fsp);
2893 return NT_STATUS_ACCESS_DENIED;
2894 }
2895
2896 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2897 conn->connectpath, smb_dname, &mtimespec);
2898
2899 if (lck == NULL) {
2900 DEBUG(0, ("open_directory: Could not get share mode lock for "
2901 "%s\n", smb_fname_str_dbg(smb_dname)));
2902 fd_close(fsp);
2903 file_free(req, fsp);
2904 return NT_STATUS_SHARING_VIOLATION;
2905 }
2906
2907 status = open_mode_check(conn, lck, fsp->name_hash,
2908 access_mask, share_access,
2909 create_options, &dir_existed);
2910
2911 if (!NT_STATUS_IS_OK(status)) {
2912 TALLOC_FREE(lck);
2913 fd_close(fsp);
2914 file_free(req, fsp);
2915 return status;
2916 }
2917
2918 set_share_mode(lck, fsp, get_current_uid(conn),
2919 req ? req->mid : 0, NO_OPLOCK);
2920
2921 /* For directories the delete on close bit at open time seems
2922 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2923 if (create_options & FILE_DELETE_ON_CLOSE) {
2924 status = can_set_delete_on_close(fsp, 0);
2925 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2926 TALLOC_FREE(lck);
2927 fd_close(fsp);
2928 file_free(req, fsp);
2929 return status;
2930 }
2931
2932 if (NT_STATUS_IS_OK(status)) {
2933 /* Note that here we set the *inital* delete on close flag,
2934 not the regular one. The magic gets handled in close. */
2935 fsp->initial_delete_on_close = True;
2936 }
2937 }
2938
2939 TALLOC_FREE(lck);
2940
2941 if (pinfo) {
2942 *pinfo = info;
2943 }
2944
2945 *result = fsp;
2946 return NT_STATUS_OK;
2947 }
2948
2949 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2950 struct smb_filename *smb_dname)
2951 {
2952 NTSTATUS status;
2953 files_struct *fsp;
2954
2955 status = SMB_VFS_CREATE_FILE(
2956 conn, /* conn */
2957 req, /* req */
2958 0, /* root_dir_fid */
2959 smb_dname, /* fname */
2960 FILE_READ_ATTRIBUTES, /* access_mask */
2961 FILE_SHARE_NONE, /* share_access */
2962 FILE_CREATE, /* create_disposition*/
2963 FILE_DIRECTORY_FILE, /* create_options */
2964 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2965 0, /* oplock_request */
2966 0, /* allocation_size */
2967 0, /* private_flags */
2968 NULL, /* sd */
2969 NULL, /* ea_list */
2970 &fsp, /* result */
2971 NULL); /* pinfo */
2972
2973 if (NT_STATUS_IS_OK(status)) {
2974 close_file(req, fsp, NORMAL_CLOSE);
2975 }
2976
2977 return status;
2978 }
2979
2980 /****************************************************************************
2981 Receive notification that one of our open files has been renamed by another
2982 smbd process.
2983 ****************************************************************************/
2984
2985 void msg_file_was_renamed(struct messaging_context *msg,
2986 void *private_data,
2987 uint32_t msg_type,
2988 struct server_id server_id,
2989 DATA_BLOB *data)
2990 {
2991 struct smbd_server_connection *sconn;
2992 files_struct *fsp;
2993 char *frm = (char *)data->data;
2994 struct file_id id;
2995 const char *sharepath;
2996 const char *base_name;
2997 const char *stream_name;
2998 struct smb_filename *smb_fname = NULL;
2999 size_t sp_len, bn_len;
3000 NTSTATUS status;
3001
3002 sconn = msg_ctx_to_sconn(msg);
3003 if (sconn == NULL) {
3004 DEBUG(1, ("could not find sconn\n"));
3005 return;
3006 }
3007
3008 if (data->data == NULL
3009 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3010 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3011 (int)data->length));
3012 return;
3013 }
3014
3015 /* Unpack the message. */
3016 pull_file_id_24(frm, &id);
3017 sharepath = &frm[24];
3018 sp_len = strlen(sharepath);
3019 base_name = sharepath + sp_len + 1;
3020 bn_len = strlen(base_name);
3021 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3022
3023 /* stream_name must always be NULL if there is no stream. */
3024 if (stream_name[0] == '\0') {
3025 stream_name = NULL;
3026 }
3027
3028 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3029 stream_name, NULL, &smb_fname);
3030 if (!NT_STATUS_IS_OK(status)) {
3031 return;
3032 }
3033
3034 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3035 "file_id %s\n",
3036 sharepath, smb_fname_str_dbg(smb_fname),
3037 file_id_string_tos(&id)));
3038
3039 for(fsp = file_find_di_first(sconn, id); fsp;
3040 fsp = file_find_di_next(fsp)) {
3041 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3042
3043 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3044 fsp->fnum, fsp_str_dbg(fsp),
3045 smb_fname_str_dbg(smb_fname)));
3046 status = fsp_set_smb_fname(fsp, smb_fname);
3047 if (!NT_STATUS_IS_OK(status)) {
3048 goto out;
3049 }
3050 } else {
3051 /* TODO. JRA. */
3052 /* Now we have the complete path we can work out if this is
3053 actually within this share and adjust newname accordingly. */
3054 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3055 "not sharepath %s) "
3056 "fnum %d from %s -> %s\n",
3057 fsp->conn->connectpath,
3058 sharepath,
3059 fsp->fnum,
3060 fsp_str_dbg(fsp),
3061 smb_fname_str_dbg(smb_fname)));
3062 }
3063 }
3064 out:
3065 TALLOC_FREE(smb_fname);
3066 return;
3067 }
3068
3069 /*
3070 * If a main file is opened for delete, all streams need to be checked for
3071 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3072 * If that works, delete them all by setting the delete on close and close.
3073 */
3074
3075 NTSTATUS open_streams_for_delete(connection_struct *conn,
3076 const char *fname)
3077 {
3078 struct stream_struct *stream_info = NULL;
3079 files_struct **streams = NULL;
3080 int i;
3081 unsigned int num_streams = 0;
3082 TALLOC_CTX *frame = talloc_stackframe();
3083 NTSTATUS status;
3084
3085 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3086 &num_streams, &stream_info);
3087
3088 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3089 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3090 DEBUG(10, ("no streams around\n"));
3091 TALLOC_FREE(frame);
3092 return NT_STATUS_OK;
3093 }
3094
3095 if (!NT_STATUS_IS_OK(status)) {
3096 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3097 nt_errstr(status)));
3098 goto fail;
3099 }
3100
3101 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3102 num_streams));
3103
3104 if (num_streams == 0) {
3105 TALLOC_FREE(frame);
3106 return NT_STATUS_OK;
3107 }
3108
3109 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3110 if (streams == NULL) {
3111 DEBUG(0, ("talloc failed\n"));
3112 status = NT_STATUS_NO_MEMORY;
3113 goto fail;
3114 }
3115
3116 for (i=0; i<num_streams; i++) {
3117 struct smb_filename *smb_fname = NULL;
3118
3119 if (strequal(stream_info[i].name, "::$DATA")) {
3120 streams[i] = NULL;
3121 continue;
3122 }
3123
3124 status = create_synthetic_smb_fname(talloc_tos(), fname,
3125 stream_info[i].name,
3126 NULL, &smb_fname);
3127 if (!NT_STATUS_IS_OK(status)) {
3128 goto fail;
3129 }
3130
3131 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3132 DEBUG(10, ("Unable to stat stream: %s\n",
3133 smb_fname_str_dbg(smb_fname)));
3134 }
3135
3136 status = SMB_VFS_CREATE_FILE(
3137 conn, /* conn */
3138 NULL, /* req */
3139 0, /* root_dir_fid */
3140 smb_fname, /* fname */
3141 DELETE_ACCESS, /* access_mask */
3142 (FILE_SHARE_READ | /* share_access */
3143 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3144 FILE_OPEN, /* create_disposition*/
3145 0, /* create_options */
3146 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3147 0, /* oplock_request */
3148 0, /* allocation_size */
3149 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3150 NULL, /* sd */
3151 NULL, /* ea_list */
3152 &streams[i], /* result */
3153 NULL); /* pinfo */
3154
3155 if (!NT_STATUS_IS_OK(status)) {
3156 DEBUG(10, ("Could not open stream %s: %s\n",
3157 smb_fname_str_dbg(smb_fname),
3158 nt_errstr(status)));
3159
3160 TALLOC_FREE(smb_fname);
3161 break;
3162 }
3163 TALLOC_FREE(smb_fname);
3164 }
3165
3166 /*
3167 * don't touch the variable "status" beyond this point :-)
3168 */
3169
3170 for (i -= 1 ; i >= 0; i--) {
3171 if (streams[i] == NULL) {
3172 continue;
3173 }
3174
3175 DEBUG(10, ("Closing stream # %d, %s\n", i,
3176 fsp_str_dbg(streams[i])));
3177 close_file(NULL, streams[i], NORMAL_CLOSE);
3178 }
3179
3180 fail:
3181 TALLOC_FREE(frame);
3182 return status;
3183 }
3184
3185 /*
3186 * Wrapper around open_file_ntcreate and open_directory
3187 */
3188
3189 static NTSTATUS create_file_unixpath(connection_struct *conn,
3190 struct smb_request *req,
3191 struct smb_filename *smb_fname,
3192 uint32_t access_mask,
3193 uint32_t share_access,
3194 uint32_t create_disposition,
3195 uint32_t create_options,
3196 uint32_t file_attributes,
3197 uint32_t oplock_request,
3198 uint64_t allocation_size,
3199 uint32_t private_flags,
3200 struct security_descriptor *sd,
3201 struct ea_list *ea_list,
3202
3203 files_struct **result,
3204 int *pinfo)
3205 {
3206 int info = FILE_WAS_OPENED;
3207 files_struct *base_fsp = NULL;
3208 files_struct *fsp = NULL;
3209 NTSTATUS status;
3210
3211 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3212 "file_attributes = 0x%x, share_access = 0x%x, "
3213 "create_disposition = 0x%x create_options = 0x%x "
3214 "oplock_request = 0x%x private_flags = 0x%x "
3215 "ea_list = 0x%p, sd = 0x%p, "
3216 "fname = %s\n",
3217 (unsigned int)access_mask,
3218 (unsigned int)file_attributes,
3219 (unsigned int)share_access,
3220 (unsigned int)create_disposition,
3221 (unsigned int)create_options,
3222 (unsigned int)oplock_request,
3223 (unsigned int)private_flags,
3224 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3225
3226 if (create_options & FILE_OPEN_BY_FILE_ID) {
3227 status = NT_STATUS_NOT_SUPPORTED;
3228 goto fail;
3229 }
3230
3231 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3232 status = NT_STATUS_INVALID_PARAMETER;
3233 goto fail;
3234 }
3235
3236 if (req == NULL) {
3237 oplock_request |= INTERNAL_OPEN_ONLY;
3238 }
3239
3240 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3241 && (access_mask & DELETE_ACCESS)
3242 && !is_ntfs_stream_smb_fname(smb_fname)) {
3243 /*
3244 * We can't open a file with DELETE access if any of the
3245 * streams is open without FILE_SHARE_DELETE
3246 */
3247 status = open_streams_for_delete(conn, smb_fname->base_name);
3248
3249 if (!NT_STATUS_IS_OK(status)) {
3250 goto fail;
3251 }
3252 }
3253
3254 /* This is the correct thing to do (check every time) but can_delete
3255 * is expensive (it may have to read the parent directory
3256 * permissions). So for now we're not doing it unless we have a strong
3257 * hint the client is really going to delete this file. If the client
3258 * is forcing FILE_CREATE let the filesystem take care of the
3259 * permissions. */
3260
3261 /* Setting FILE_SHARE_DELETE is the hint. */
3262
3263 if ((create_disposition != FILE_CREATE)
3264 && (access_mask & DELETE_ACCESS)
3265 && (!(can_delete_file_in_directory(conn, smb_fname) ||
3266 can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
3267 status = NT_STATUS_ACCESS_DENIED;
3268 DEBUG(10,("create_file_unixpath: open file %s "
3269 "for delete ACCESS_DENIED\n",
3270 smb_fname_str_dbg(smb_fname)));
3271 goto fail;
3272 }
3273
3274 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3275 !security_token_has_privilege(get_current_nttok(conn),
3276 SEC_PRIV_SECURITY)) {
3277 DEBUG(10, ("create_file_unixpath: open on %s "
3278 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3279 smb_fname_str_dbg(smb_fname)));
3280 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3281 goto fail;
3282 }
3283
3284 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3285 && is_ntfs_stream_smb_fname(smb_fname)
3286 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3287 uint32 base_create_disposition;
3288 struct smb_filename *smb_fname_base = NULL;
3289
3290 if (create_options & FILE_DIRECTORY_FILE) {
3291 status = NT_STATUS_NOT_A_DIRECTORY;
3292 goto fail;
3293 }
3294
3295 switch (create_disposition) {
3296 case FILE_OPEN:
3297 base_create_disposition = FILE_OPEN;
3298 break;
3299 default:
3300 base_create_disposition = FILE_OPEN_IF;
3301 break;
3302 }
3303
3304 /* Create an smb_filename with stream_name == NULL. */
3305 status = create_synthetic_smb_fname(talloc_tos(),
3306 smb_fname->base_name,
3307 NULL, NULL,
3308 &smb_fname_base);
3309 if (!NT_STATUS_IS_OK(status)) {
3310 goto fail;
3311 }
3312
3313 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3314 DEBUG(10, ("Unable to stat stream: %s\n",
3315 smb_fname_str_dbg(smb_fname_base)));
3316 }
3317
3318 /* Open the base file. */
3319 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3320 FILE_SHARE_READ
3321 | FILE_SHARE_WRITE
3322 | FILE_SHARE_DELETE,
3323 base_create_disposition,
3324 0, 0, 0, 0, 0, NULL, NULL,
3325 &base_fsp, NULL);
3326 TALLOC_FREE(smb_fname_base);
3327
3328 if (!NT_STATUS_IS_OK(status)) {
3329 DEBUG(10, ("create_file_unixpath for base %s failed: "
3330 "%s\n", smb_fname->base_name,
3331 nt_errstr(status)));
3332 goto fail;
3333 }
3334 /* we don't need to low level fd */
3335 fd_close(base_fsp);
3336 }
3337
3338 /*
3339 * If it's a request for a directory open, deal with it separately.
3340 */
3341
3342 if (create_options & FILE_DIRECTORY_FILE) {
3343
3344 if (create_options & FILE_NON_DIRECTORY_FILE) {
3345 status = NT_STATUS_INVALID_PARAMETER;
3346 goto fail;
3347 }
3348
3349 /* Can't open a temp directory. IFS kit test. */
3350 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3351 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3352 status = NT_STATUS_INVALID_PARAMETER;
3353 goto fail;
3354 }
3355
3356 /*
3357 * We will get a create directory here if the Win32
3358 * app specified a security descriptor in the
3359 * CreateDirectory() call.
3360 */
3361
3362 oplock_request = 0;
3363 status = open_directory(
3364 conn, req, smb_fname, access_mask, share_access,
3365 create_disposition, create_options, file_attributes,
3366 &info, &fsp);
3367 } else {
3368
3369 /*
3370 * Ordinary file case.
3371 */
3372
3373 status = file_new(req, conn, &fsp);
3374 if(!NT_STATUS_IS_OK(status)) {
3375 goto fail;
3376 }
3377
3378 status = fsp_set_smb_fname(fsp, smb_fname);
3379 if (!NT_STATUS_IS_OK(status)) {
3380 goto fail;
3381 }
3382
3383 /*
3384 * We're opening the stream element of a base_fsp
3385 * we already opened. Set up the base_fsp pointer.
3386 */
3387 if (base_fsp) {
3388 fsp->base_fsp = base_fsp;
3389 }
3390
3391 status = open_file_ntcreate(conn,
3392 req,
3393 access_mask,
3394 share_access,
3395 create_disposition,
3396 create_options,
3397 file_attributes,
3398 oplock_request,
3399 private_flags,
3400 &info,
3401 fsp);
3402
3403 if(!NT_STATUS_IS_OK(status)) {
3404 file_free(req, fsp);
3405 fsp = NULL;
3406 }
3407
3408 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3409
3410 /* A stream open never opens a directory */
3411
3412 if (base_fsp) {
3413 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3414 goto fail;
3415 }
3416
3417 /*
3418 * Fail the open if it was explicitly a non-directory
3419 * file.
3420 */
3421
3422 if (create_options & FILE_NON_DIRECTORY_FILE) {
3423 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3424 goto fail;
3425 }
3426
3427 oplock_request = 0;
3428 status = open_directory(
3429 conn, req, smb_fname, access_mask,
3430 share_access, create_disposition,
3431 create_options, file_attributes,
3432 &info, &fsp);
3433 }
3434 }
3435
3436 if (!NT_STATUS_IS_OK(status)) {
3437 goto fail;
3438 }
3439
3440 fsp->base_fsp = base_fsp;
3441
3442 /*
3443 * According to the MS documentation, the only time the security
3444 * descriptor is applied to the opened file is iff we *created* the
3445 * file; an existing file stays the same.
3446 *
3447 * Also, it seems (from observation) that you can open the file with
3448 * any access mask but you can still write the sd. We need to override
3449 * the granted access before we call set_sd
3450 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3451 */
3452
3453 if ((sd != NULL) && (info == FILE_WAS_CREATED)
3454 && lp_nt_acl_support(SNUM(conn))) {
3455
3456 uint32_t sec_info_sent;
3457 uint32_t saved_access_mask = fsp->access_mask;
3458
3459 sec_info_sent = get_sec_info(sd);
3460
3461 fsp->access_mask = FILE_GENERIC_ALL;
3462
3463 /* Convert all the generic bits. */
3464 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3465 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3466
3467 if (sec_info_sent & (SECINFO_OWNER|
3468 SECINFO_GROUP|
3469 SECINFO_DACL|
3470 SECINFO_SACL)) {
3471 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3472 }
3473
3474 fsp->access_mask = saved_access_mask;
3475
3476 if (!NT_STATUS_IS_OK(status)) {
3477 goto fail;
3478 }
3479 }
3480
3481 if ((ea_list != NULL) &&
3482 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3483 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3484 if (!NT_STATUS_IS_OK(status)) {
3485 goto fail;
3486 }
3487 }
3488
3489 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3490 status = NT_STATUS_ACCESS_DENIED;
3491 goto fail;
3492 }
3493
3494 /* Save the requested allocation size. */
3495 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3496 if (allocation_size
3497 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3498 fsp->initial_allocation_size = smb_roundup(
3499 fsp->conn, allocation_size);
3500 if (fsp->is_directory) {
3501 /* Can't set allocation size on a directory. */
3502 status = NT_STATUS_ACCESS_DENIED;
3503 goto fail;
3504 }
3505 if (vfs_allocate_file_space(
3506 fsp, fsp->initial_allocation_size) == -1) {
3507 status = NT_STATUS_DISK_FULL;
3508 goto fail;
3509 }
3510 } else {
3511 fsp->initial_allocation_size = smb_roundup(
3512 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3513 }
3514 }
3515
3516 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3517
3518 *result = fsp;
3519 if (pinfo != NULL) {
3520 *pinfo = info;
3521 }
3522
3523 smb_fname->st = fsp->fsp_name->st;
3524
3525 return NT_STATUS_OK;
3526
3527 fail:
3528 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3529
3530 if (fsp != NULL) {
3531 if (base_fsp && fsp->base_fsp == base_fsp) {
3532 /*
3533 * The close_file below will close
3534 * fsp->base_fsp.
3535 */
3536 base_fsp = NULL;
3537 }
3538 close_file(req, fsp, ERROR_CLOSE);
3539 fsp = NULL;
3540 }
3541 if (base_fsp != NULL) {
3542 close_file(req, base_fsp, ERROR_CLOSE);
3543 base_fsp = NULL;
3544 }
3545 return status;
3546 }
3547
3548 /*
3549 * Calculate the full path name given a relative fid.
3550 */
3551 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3552 struct smb_request *req,
3553 uint16_t root_dir_fid,
3554 const struct smb_filename *smb_fname,
3555 struct smb_filename **smb_fname_out)
3556 {
3557 files_struct *dir_fsp;
3558 char *parent_fname = NULL;
3559 char *new_base_name = NULL;
3560 NTSTATUS status;
3561
3562 if (root_dir_fid == 0 || !smb_fname) {
3563 status = NT_STATUS_INTERNAL_ERROR;
3564 goto out;
3565 }
3566
3567 dir_fsp = file_fsp(req, root_dir_fid);
3568
3569 if (dir_fsp == NULL) {
3570 status = NT_STATUS_INVALID_HANDLE;
3571 goto out;
3572 }
3573
3574 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3575 status = NT_STATUS_INVALID_HANDLE;
3576 goto out;
3577 }
3578
3579 if (!dir_fsp->is_directory) {
3580
3581 /*
3582 * Check to see if this is a mac fork of some kind.
3583 */
3584
3585 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3586 is_ntfs_stream_smb_fname(smb_fname)) {
3587 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3588 goto out;
3589 }
3590
3591 /*
3592 we need to handle the case when we get a
3593 relative open relative to a file and the
3594 pathname is blank - this is a reopen!
3595 (hint from demyn plantenberg)
3596 */
3597
3598 status = NT_STATUS_INVALID_HANDLE;
3599 goto out;
3600 }
3601
3602 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3603 /*
3604 * We're at the toplevel dir, the final file name
3605 * must not contain ./, as this is filtered out
3606 * normally by srvstr_get_path and unix_convert
3607 * explicitly rejects paths containing ./.
3608 */
3609 parent_fname = talloc_strdup(talloc_tos(), "");
3610 if (parent_fname == NULL) {
3611 status = NT_STATUS_NO_MEMORY;
3612 goto out;
3613 }
3614 } else {
3615 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3616
3617 /*
3618 * Copy in the base directory name.
3619 */
3620
3621 parent_fname = talloc_array(talloc_tos(), char,
3622 dir_name_len+2);
3623 if (parent_fname == NULL) {
3624 status = NT_STATUS_NO_MEMORY;
3625 goto out;
3626 }
3627 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3628 dir_name_len+1);
3629
3630 /*
3631 * Ensure it ends in a '/'.
3632 * We used TALLOC_SIZE +2 to add space for the '/'.
3633 */
3634
3635 if(dir_name_len
3636 && (parent_fname[dir_name_len-1] != '\\')
3637 && (parent_fname[dir_name_len-1] != '/')) {
3638 parent_fname[dir_name_len] = '/';
3639 parent_fname[dir_name_len+1] = '\0';
3640 }
3641 }
3642
3643 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3644 smb_fname->base_name);
3645 if (new_base_name == NULL) {
3646 status = NT_STATUS_NO_MEMORY;
3647 goto out;
3648 }
3649
3650 status = filename_convert(req,
3651 conn,
3652 req->flags2 & FLAGS2_DFS_PATHNAMES,
3653 new_base_name,
3654 0,
3655 NULL,
3656 smb_fname_out);
3657 if (!NT_STATUS_IS_OK(status)) {
3658 goto out;
3659 }
3660
3661 out:
3662 TALLOC_FREE(parent_fname);
3663 TALLOC_FREE(new_base_name);
3664 return status;
3665 }
3666
3667 NTSTATUS create_file_default(connection_struct *conn,
3668 struct smb_request *req,
3669 uint16_t root_dir_fid,
3670 struct smb_filename *smb_fname,
3671 uint32_t access_mask,
3672 uint32_t share_access,
3673 uint32_t create_disposition,
3674 uint32_t create_options,
3675 uint32_t file_attributes,
3676 uint32_t oplock_request,
3677 uint64_t allocation_size,
3678 uint32_t private_flags,
3679 struct security_descriptor *sd,
3680 struct ea_list *ea_list,
3681 files_struct **result,
3682 int *pinfo)
3683 {
3684 int info = FILE_WAS_OPENED;
3685 files_struct *fsp = NULL;
3686 NTSTATUS status;
3687 bool stream_name = false;
3688
3689 DEBUG(10,("create_file: access_mask = 0x%x "
3690 "file_attributes = 0x%x, share_access = 0x%x, "
3691 "create_disposition = 0x%x create_options = 0x%x "
3692 "oplock_request = 0x%x "
3693 "private_flags = 0x%x "
3694 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3695 "fname = %s\n",
3696 (unsigned int)access_mask,
3697 (unsigned int)file_attributes,
3698 (unsigned int)share_access,
3699 (unsigned int)create_disposition,
3700 (unsigned int)create_options,
3701 (unsigned int)oplock_request,
3702 (unsigned int)private_flags,
3703 (unsigned int)root_dir_fid,
3704 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3705
3706 /*
3707 * Calculate the filename from the root_dir_if if necessary.
3708 */
3709
3710 if (root_dir_fid != 0) {
3711 struct smb_filename *smb_fname_out = NULL;
3712 status = get_relative_fid_filename(conn, req, root_dir_fid,
3713 smb_fname, &smb_fname_out);
3714 if (!NT_STATUS_IS_OK(status)) {
3715 goto fail;
3716 }
3717 smb_fname = smb_fname_out;
3718 }
3719
3720 /*
3721 * Check to see if this is a mac fork of some kind.
3722 */
3723
3724 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3725 if (stream_name) {
3726 enum FAKE_FILE_TYPE fake_file_type;
3727
3728 fake_file_type = is_fake_file(smb_fname);
3729
3730 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3731
3732 /*
3733 * Here we go! support for changing the disk quotas
3734 * --metze
3735 *
3736 * We need to fake up to open this MAGIC QUOTA file
3737 * and return a valid FID.
3738 *
3739 * w2k close this file directly after openening xp
3740 * also tries a QUERY_FILE_INFO on the file and then
3741 * close it
3742 */
3743 status = open_fake_file(req, conn, req->vuid,
3744 fake_file_type, smb_fname,
3745 access_mask, &fsp);
3746 if (!NT_STATUS_IS_OK(status)) {
3747 goto fail;
3748 }
3749
3750 ZERO_STRUCT(smb_fname->st);
3751 goto done;
3752 }
3753
3754 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3755 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3756 goto fail;
3757 }
3758 }
3759
3760 /* All file access must go through check_name() */
3761
3762 status = check_name(conn, smb_fname->base_name);
3763 if (!NT_STATUS_IS_OK(status)) {
3764 goto fail;
3765 }
3766
3767 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3768 int ret;
3769 smb_fname->stream_name = NULL;
3770 /* We have to handle this error here. */
3771 if (create_options & FILE_DIRECTORY_FILE) {
3772 status = NT_STATUS_NOT_A_DIRECTORY;
3773 goto fail;
3774 }
3775 if (lp_posix_pathnames()) {
3776 ret = SMB_VFS_LSTAT(conn, smb_fname);
3777 } else {
3778 ret = SMB_VFS_STAT(conn, smb_fname);
3779 }
3780
3781 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3782 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3783 goto fail;
3784 }
3785 }
3786
3787 status = create_file_unixpath(
3788 conn, req, smb_fname, access_mask, share_access,
3789 create_disposition, create_options, file_attributes,
3790 oplock_request, allocation_size, private_flags,
3791 sd, ea_list,
3792 &fsp, &info);
3793
3794 if (!NT_STATUS_IS_OK(status)) {
3795 goto fail;
3796 }
3797
3798 done:
3799 DEBUG(10, ("create_file: info=%d\n", info));
3800
3801 *result = fsp;
3802 if (pinfo != NULL) {
3803 *pinfo = info;
3804 }
3805 return NT_STATUS_OK;
3806
3807 fail:
3808 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3809
3810 if (fsp != NULL) {
3811 close_file(req, fsp, ERROR_CLOSE);
3812 fsp = NULL;
3813 }
3814 return status;
3815 }
Working branch of Samba for id10ts