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s3: Put an indirection layer into share_mode_lock
[Samba/id10ts.git] / source3 / smbd / open.c
blob7a855529107ce66386e040ec477de83d0d49a99b
1 /*
2 Unix SMB/CIFS implementation.
3 file opening and share modes
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2004
6 Copyright (C) Volker Lendecke 2005
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "system/filesys.h"
24 #include "printing.h"
25 #include "smbd/smbd.h"
26 #include "smbd/globals.h"
27 #include "fake_file.h"
28 #include "../libcli/security/security.h"
29 #include "../librpc/gen_ndr/ndr_security.h"
30 #include "../librpc/gen_ndr/open_files.h"
31 #include "auth.h"
32 #include "messages.h"
33
34 extern const struct generic_mapping file_generic_mapping;
35
36 struct deferred_open_record {
37 bool delayed_for_oplocks;
38 struct file_id id;
39 };
40
41 /****************************************************************************
42 If the requester wanted DELETE_ACCESS and was rejected because
43 the file ACL didn't include DELETE_ACCESS, see if the parent ACL
44 ovverrides this.
45 ****************************************************************************/
46
47 static bool parent_override_delete(connection_struct *conn,
48 const struct smb_filename *smb_fname,
49 uint32_t access_mask,
50 uint32_t rejected_mask)
51 {
52 if ((access_mask & DELETE_ACCESS) &&
53 (rejected_mask & DELETE_ACCESS) &&
54 can_delete_file_in_directory(conn, smb_fname)) {
55 return true;
56 }
57 return false;
58 }
59
60 /****************************************************************************
61 Check if we have open rights.
62 ****************************************************************************/
63
64 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
65 const struct smb_filename *smb_fname,
66 uint32_t access_mask)
67 {
68 /* Check if we have rights to open. */
69 NTSTATUS status;
70 struct security_descriptor *sd = NULL;
71 uint32_t rejected_share_access;
72 uint32_t rejected_mask = access_mask;
73
74 rejected_share_access = access_mask & ~(conn->share_access);
75
76 if (rejected_share_access) {
77 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
78 "on %s (0x%x)\n",
79 (unsigned int)access_mask,
80 smb_fname_str_dbg(smb_fname),
81 (unsigned int)rejected_share_access ));
82 return NT_STATUS_ACCESS_DENIED;
83 }
84
85 if (get_current_uid(conn) == (uid_t)0) {
86 /* I'm sorry sir, I didn't know you were root... */
87 DEBUG(10,("smbd_check_access_rights: root override "
88 "on %s. Granting 0x%x\n",
89 smb_fname_str_dbg(smb_fname),
90 (unsigned int)access_mask ));
91 return NT_STATUS_OK;
92 }
93
94 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
95 DEBUG(10,("smbd_check_access_rights: not checking ACL "
96 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
97 smb_fname_str_dbg(smb_fname),
98 (unsigned int)access_mask ));
99 return NT_STATUS_OK;
100 }
101
102 if (access_mask == DELETE_ACCESS &&
103 VALID_STAT(smb_fname->st) &&
104 S_ISLNK(smb_fname->st.st_ex_mode)) {
105 /* We can always delete a symlink. */
106 DEBUG(10,("smbd_check_access_rights: not checking ACL "
107 "on DELETE_ACCESS on symlink %s.\n",
108 smb_fname_str_dbg(smb_fname) ));
109 return NT_STATUS_OK;
110 }
111
112 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
113 (SECINFO_OWNER |
114 SECINFO_GROUP |
115 SECINFO_DACL),&sd);
116
117 if (!NT_STATUS_IS_OK(status)) {
118 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
119 "on %s: %s\n",
120 smb_fname_str_dbg(smb_fname),
121 nt_errstr(status)));
122
123 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
124 goto access_denied;
125 }
126
127 return status;
128 }
129
130 /*
131 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
132 * owner WRITE_DAC and READ_CONTROL.
133 */
134 status = se_access_check(sd,
135 get_current_nttok(conn),
136 (access_mask & ~FILE_READ_ATTRIBUTES),
137 &rejected_mask);
138
139 DEBUG(10,("smbd_check_access_rights: file %s requesting "
140 "0x%x returning 0x%x (%s)\n",
141 smb_fname_str_dbg(smb_fname),
142 (unsigned int)access_mask,
143 (unsigned int)rejected_mask,
144 nt_errstr(status) ));
145
146 if (!NT_STATUS_IS_OK(status)) {
147 if (DEBUGLEVEL >= 10) {
148 DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
149 smb_fname_str_dbg(smb_fname) ));
150 NDR_PRINT_DEBUG(security_descriptor, sd);
151 }
152 }
153
154 TALLOC_FREE(sd);
155
156 if (NT_STATUS_IS_OK(status) ||
157 !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
158 return status;
159 }
160
161 /* Here we know status == NT_STATUS_ACCESS_DENIED. */
162
163 access_denied:
164
165 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
166 (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
167 (lp_map_readonly(SNUM(conn)) ||
168 lp_map_archive(SNUM(conn)) ||
169 lp_map_hidden(SNUM(conn)) ||
170 lp_map_system(SNUM(conn)))) {
171 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
172
173 DEBUG(10,("smbd_check_access_rights: "
174 "overrode "
175 "FILE_WRITE_ATTRIBUTES "
176 "on file %s\n",
177 smb_fname_str_dbg(smb_fname)));
178 }
179
180 if (parent_override_delete(conn,
181 smb_fname,
182 access_mask,
183 rejected_mask)) {
184 /* Were we trying to do an open
185 * for delete and didn't get DELETE
186 * access (only) ? Check if the
187 * directory allows DELETE_CHILD.
188 * See here:
189 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
190 * for details. */
191
192 rejected_mask &= ~DELETE_ACCESS;
193
194 DEBUG(10,("smbd_check_access_rights: "
195 "overrode "
196 "DELETE_ACCESS on "
197 "file %s\n",
198 smb_fname_str_dbg(smb_fname)));
199 }
200
201 if (rejected_mask != 0) {
202 return NT_STATUS_ACCESS_DENIED;
203 } else {
204 return NT_STATUS_OK;
205 }
206 }
207
208 static NTSTATUS check_parent_access(struct connection_struct *conn,
209 struct smb_filename *smb_fname,
210 uint32_t access_mask,
211 char **pp_parent_dir)
212 {
213 NTSTATUS status;
214 char *parent_dir = NULL;
215 struct security_descriptor *parent_sd = NULL;
216 uint32_t access_granted = 0;
217
218 if (!parent_dirname(talloc_tos(),
219 smb_fname->base_name,
220 &parent_dir,
221 NULL)) {
222 return NT_STATUS_NO_MEMORY;
223 }
224
225 if (pp_parent_dir) {
226 *pp_parent_dir = parent_dir;
227 }
228
229 if (get_current_uid(conn) == (uid_t)0) {
230 /* I'm sorry sir, I didn't know you were root... */
231 DEBUG(10,("check_parent_access: root override "
232 "on %s. Granting 0x%x\n",
233 smb_fname_str_dbg(smb_fname),
234 (unsigned int)access_mask ));
235 return NT_STATUS_OK;
236 }
237
238 status = SMB_VFS_GET_NT_ACL(conn,
239 parent_dir,
240 SECINFO_DACL,
241 &parent_sd);
242
243 if (!NT_STATUS_IS_OK(status)) {
244 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
245 "%s with error %s\n",
246 parent_dir,
247 nt_errstr(status)));
248 return status;
249 }
250
251 /*
252 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
253 * owner WRITE_DAC and READ_CONTROL.
254 */
255 status = se_access_check(parent_sd,
256 get_current_nttok(conn),
257 (access_mask & ~FILE_READ_ATTRIBUTES),
258 &access_granted);
259 if(!NT_STATUS_IS_OK(status)) {
260 DEBUG(5,("check_parent_access: access check "
261 "on directory %s for "
262 "path %s for mask 0x%x returned (0x%x) %s\n",
263 parent_dir,
264 smb_fname->base_name,
265 access_mask,
266 access_granted,
267 nt_errstr(status) ));
268 return status;
269 }
270
271 return NT_STATUS_OK;
272 }
273
274 /****************************************************************************
275 fd support routines - attempt to do a dos_open.
276 ****************************************************************************/
277
278 static NTSTATUS fd_open(struct connection_struct *conn,
279 files_struct *fsp,
280 int flags,
281 mode_t mode)
282 {
283 struct smb_filename *smb_fname = fsp->fsp_name;
284 NTSTATUS status = NT_STATUS_OK;
285
286 #ifdef O_NOFOLLOW
287 /*
288 * Never follow symlinks on a POSIX client. The
289 * client should be doing this.
290 */
291
292 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
293 flags |= O_NOFOLLOW;
294 }
295 #endif
296
297 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
298 if (fsp->fh->fd == -1) {
299 status = map_nt_error_from_unix(errno);
300 if (errno == EMFILE) {
301 static time_t last_warned = 0L;
302
303 if (time((time_t *) NULL) > last_warned) {
304 DEBUG(0,("Too many open files, unable "
305 "to open more! smbd's max "
306 "open files = %d\n",
307 lp_max_open_files()));
308 last_warned = time((time_t *) NULL);
309 }
310 }
311
312 }
313
314 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
315 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
316 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
317
318 return status;
319 }
320
321 /****************************************************************************
322 Close the file associated with a fsp.
323 ****************************************************************************/
324
325 NTSTATUS fd_close(files_struct *fsp)
326 {
327 int ret;
328
329 if (fsp->dptr) {
330 dptr_CloseDir(fsp);
331 }
332 if (fsp->fh->fd == -1) {
333 return NT_STATUS_OK; /* What we used to call a stat open. */
334 }
335 if (fsp->fh->ref_count > 1) {
336 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
337 }
338
339 ret = SMB_VFS_CLOSE(fsp);
340 fsp->fh->fd = -1;
341 if (ret == -1) {
342 return map_nt_error_from_unix(errno);
343 }
344 return NT_STATUS_OK;
345 }
346
347 /****************************************************************************
348 Change the ownership of a file to that of the parent directory.
349 Do this by fd if possible.
350 ****************************************************************************/
351
352 void change_file_owner_to_parent(connection_struct *conn,
353 const char *inherit_from_dir,
354 files_struct *fsp)
355 {
356 struct smb_filename *smb_fname_parent = NULL;
357 NTSTATUS status;
358 int ret;
359
360 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
361 NULL, NULL, &smb_fname_parent);
362 if (!NT_STATUS_IS_OK(status)) {
363 return;
364 }
365
366 ret = SMB_VFS_STAT(conn, smb_fname_parent);
367 if (ret == -1) {
368 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
369 "directory %s. Error was %s\n",
370 smb_fname_str_dbg(smb_fname_parent),
371 strerror(errno)));
372 TALLOC_FREE(smb_fname_parent);
373 return;
374 }
375
376 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
377 /* Already this uid - no need to change. */
378 DEBUG(10,("change_file_owner_to_parent: file %s "
379 "is already owned by uid %d\n",
380 fsp_str_dbg(fsp),
381 (int)fsp->fsp_name->st.st_ex_uid ));
382 TALLOC_FREE(smb_fname_parent);
383 return;
384 }
385
386 become_root();
387 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
388 unbecome_root();
389 if (ret == -1) {
390 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
391 "file %s to parent directory uid %u. Error "
392 "was %s\n", fsp_str_dbg(fsp),
393 (unsigned int)smb_fname_parent->st.st_ex_uid,
394 strerror(errno) ));
395 } else {
396 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
397 "parent directory uid %u.\n", fsp_str_dbg(fsp),
398 (unsigned int)smb_fname_parent->st.st_ex_uid));
399 /* Ensure the uid entry is updated. */
400 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
401 }
402
403 TALLOC_FREE(smb_fname_parent);
404 }
405
406 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
407 const char *inherit_from_dir,
408 const char *fname,
409 SMB_STRUCT_STAT *psbuf)
410 {
411 struct smb_filename *smb_fname_parent = NULL;
412 struct smb_filename *smb_fname_cwd = NULL;
413 char *saved_dir = NULL;
414 TALLOC_CTX *ctx = talloc_tos();
415 NTSTATUS status = NT_STATUS_OK;
416 int ret;
417
418 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
419 &smb_fname_parent);
420 if (!NT_STATUS_IS_OK(status)) {
421 return status;
422 }
423
424 ret = SMB_VFS_STAT(conn, smb_fname_parent);
425 if (ret == -1) {
426 status = map_nt_error_from_unix(errno);
427 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
428 "directory %s. Error was %s\n",
429 smb_fname_str_dbg(smb_fname_parent),
430 strerror(errno)));
431 goto out;
432 }
433
434 /* We've already done an lstat into psbuf, and we know it's a
435 directory. If we can cd into the directory and the dev/ino
436 are the same then we can safely chown without races as
437 we're locking the directory in place by being in it. This
438 should work on any UNIX (thanks tridge :-). JRA.
439 */
440
441 saved_dir = vfs_GetWd(ctx,conn);
442 if (!saved_dir) {
443 status = map_nt_error_from_unix(errno);
444 DEBUG(0,("change_dir_owner_to_parent: failed to get "
445 "current working directory. Error was %s\n",
446 strerror(errno)));
447 goto out;
448 }
449
450 /* Chdir into the new path. */
451 if (vfs_ChDir(conn, fname) == -1) {
452 status = map_nt_error_from_unix(errno);
453 DEBUG(0,("change_dir_owner_to_parent: failed to change "
454 "current working directory to %s. Error "
455 "was %s\n", fname, strerror(errno) ));
456 goto chdir;
457 }
458
459 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
460 &smb_fname_cwd);
461 if (!NT_STATUS_IS_OK(status)) {
462 return status;
463 }
464
465 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
466 if (ret == -1) {
467 status = map_nt_error_from_unix(errno);
468 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
469 "directory '.' (%s) Error was %s\n",
470 fname, strerror(errno)));
471 goto chdir;
472 }
473
474 /* Ensure we're pointing at the same place. */
475 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
476 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
477 DEBUG(0,("change_dir_owner_to_parent: "
478 "device/inode on directory %s changed. "
479 "Refusing to chown !\n", fname ));
480 status = NT_STATUS_ACCESS_DENIED;
481 goto chdir;
482 }
483
484 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
485 /* Already this uid - no need to change. */
486 DEBUG(10,("change_dir_owner_to_parent: directory %s "
487 "is already owned by uid %d\n",
488 fname,
489 (int)smb_fname_cwd->st.st_ex_uid ));
490 status = NT_STATUS_OK;
491 goto chdir;
492 }
493
494 become_root();
495 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
496 (gid_t)-1);
497 unbecome_root();
498 if (ret == -1) {
499 status = map_nt_error_from_unix(errno);
500 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
501 "directory %s to parent directory uid %u. "
502 "Error was %s\n", fname,
503 (unsigned int)smb_fname_parent->st.st_ex_uid,
504 strerror(errno) ));
505 } else {
506 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
507 "directory %s to parent directory uid %u.\n",
508 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
509 /* Ensure the uid entry is updated. */
510 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
511 }
512
513 chdir:
514 vfs_ChDir(conn,saved_dir);
515 out:
516 TALLOC_FREE(smb_fname_parent);
517 TALLOC_FREE(smb_fname_cwd);
518 return status;
519 }
520
521 /****************************************************************************
522 Open a file.
523 ****************************************************************************/
524
525 static NTSTATUS open_file(files_struct *fsp,
526 connection_struct *conn,
527 struct smb_request *req,
528 const char *parent_dir,
529 int flags,
530 mode_t unx_mode,
531 uint32 access_mask, /* client requested access mask. */
532 uint32 open_access_mask) /* what we're actually using in the open. */
533 {
534 struct smb_filename *smb_fname = fsp->fsp_name;
535 NTSTATUS status = NT_STATUS_OK;
536 int accmode = (flags & O_ACCMODE);
537 int local_flags = flags;
538 bool file_existed = VALID_STAT(fsp->fsp_name->st);
539 bool file_created = false;
540
541 fsp->fh->fd = -1;
542 errno = EPERM;
543
544 /* Check permissions */
545
546 /*
547 * This code was changed after seeing a client open request
548 * containing the open mode of (DENY_WRITE/read-only) with
549 * the 'create if not exist' bit set. The previous code
550 * would fail to open the file read only on a read-only share
551 * as it was checking the flags parameter directly against O_RDONLY,
552 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
553 * JRA.
554 */
555
556 if (!CAN_WRITE(conn)) {
557 /* It's a read-only share - fail if we wanted to write. */
558 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
559 DEBUG(3,("Permission denied opening %s\n",
560 smb_fname_str_dbg(smb_fname)));
561 return NT_STATUS_ACCESS_DENIED;
562 } else if(flags & O_CREAT) {
563 /* We don't want to write - but we must make sure that
564 O_CREAT doesn't create the file if we have write
565 access into the directory.
566 */
567 flags &= ~(O_CREAT|O_EXCL);
568 local_flags &= ~(O_CREAT|O_EXCL);
569 }
570 }
571
572 /*
573 * This little piece of insanity is inspired by the
574 * fact that an NT client can open a file for O_RDONLY,
575 * but set the create disposition to FILE_EXISTS_TRUNCATE.
576 * If the client *can* write to the file, then it expects to
577 * truncate the file, even though it is opening for readonly.
578 * Quicken uses this stupid trick in backup file creation...
579 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
580 * for helping track this one down. It didn't bite us in 2.0.x
581 * as we always opened files read-write in that release. JRA.
582 */
583
584 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
585 DEBUG(10,("open_file: truncate requested on read-only open "
586 "for file %s\n", smb_fname_str_dbg(smb_fname)));
587 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
588 }
589
590 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
591 (!file_existed && (local_flags & O_CREAT)) ||
592 ((local_flags & O_TRUNC) == O_TRUNC) ) {
593 const char *wild;
594
595 /*
596 * We can't actually truncate here as the file may be locked.
597 * open_file_ntcreate will take care of the truncate later. JRA.
598 */
599
600 local_flags &= ~O_TRUNC;
601
602 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
603 /*
604 * We would block on opening a FIFO with no one else on the
605 * other end. Do what we used to do and add O_NONBLOCK to the
606 * open flags. JRA.
607 */
608
609 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
610 local_flags |= O_NONBLOCK;
611 }
612 #endif
613
614 /* Don't create files with Microsoft wildcard characters. */
615 if (fsp->base_fsp) {
616 /*
617 * wildcard characters are allowed in stream names
618 * only test the basefilename
619 */
620 wild = fsp->base_fsp->fsp_name->base_name;
621 } else {
622 wild = smb_fname->base_name;
623 }
624 if ((local_flags & O_CREAT) && !file_existed &&
625 ms_has_wild(wild)) {
626 return NT_STATUS_OBJECT_NAME_INVALID;
627 }
628
629 /* Can we access this file ? */
630 if (!fsp->base_fsp) {
631 /* Only do this check on non-stream open. */
632 if (file_existed) {
633 status = smbd_check_access_rights(conn,
634 smb_fname,
635 access_mask);
636 } else if (local_flags & O_CREAT){
637 status = check_parent_access(conn,
638 smb_fname,
639 SEC_DIR_ADD_FILE,
640 NULL);
641 } else {
642 /* File didn't exist and no O_CREAT. */
643 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
644 }
645 if (!NT_STATUS_IS_OK(status)) {
646 DEBUG(10,("open_file: "
647 "%s on file "
648 "%s returned %s\n",
649 file_existed ?
650 "smbd_check_access_rights" :
651 "check_parent_access",
652 smb_fname_str_dbg(smb_fname),
653 nt_errstr(status) ));
654 return status;
655 }
656 }
657
658 /* Actually do the open */
659 status = fd_open(conn, fsp, local_flags, unx_mode);
660 if (!NT_STATUS_IS_OK(status)) {
661 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
662 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
663 nt_errstr(status),local_flags,flags));
664 return status;
665 }
666
667 if ((local_flags & O_CREAT) && !file_existed) {
668 file_created = true;
669 }
670
671 } else {
672 fsp->fh->fd = -1; /* What we used to call a stat open. */
673 if (!file_existed) {
674 /* File must exist for a stat open. */
675 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
676 }
677
678 status = smbd_check_access_rights(conn,
679 smb_fname,
680 access_mask);
681
682 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
683 fsp->posix_open &&
684 S_ISLNK(smb_fname->st.st_ex_mode)) {
685 /* This is a POSIX stat open for delete
686 * or rename on a symlink that points
687 * nowhere. Allow. */
688 DEBUG(10,("open_file: allowing POSIX "
689 "open on bad symlink %s\n",
690 smb_fname_str_dbg(smb_fname)));
691 status = NT_STATUS_OK;
692 }
693
694 if (!NT_STATUS_IS_OK(status)) {
695 DEBUG(10,("open_file: "
696 "smbd_check_access_rights on file "
697 "%s returned %s\n",
698 smb_fname_str_dbg(smb_fname),
699 nt_errstr(status) ));
700 return status;
701 }
702 }
703
704 if (!file_existed) {
705 int ret;
706
707 if (fsp->fh->fd == -1) {
708 ret = SMB_VFS_STAT(conn, smb_fname);
709 } else {
710 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
711 /* If we have an fd, this stat should succeed. */
712 if (ret == -1) {
713 DEBUG(0,("Error doing fstat on open file %s "
714 "(%s)\n",
715 smb_fname_str_dbg(smb_fname),
716 strerror(errno) ));
717 }
718 }
719
720 /* For a non-io open, this stat failing means file not found. JRA */
721 if (ret == -1) {
722 status = map_nt_error_from_unix(errno);
723 fd_close(fsp);
724 return status;
725 }
726
727 if (file_created) {
728 bool need_re_stat = false;
729 /* Do all inheritance work after we've
730 done a successful stat call and filled
731 in the stat struct in fsp->fsp_name. */
732
733 /* Inherit the ACL if required */
734 if (lp_inherit_perms(SNUM(conn))) {
735 inherit_access_posix_acl(conn, parent_dir,
736 smb_fname->base_name,
737 unx_mode);
738 need_re_stat = true;
739 }
740
741 /* Change the owner if required. */
742 if (lp_inherit_owner(SNUM(conn))) {
743 change_file_owner_to_parent(conn, parent_dir,
744 fsp);
745 need_re_stat = true;
746 }
747
748 if (need_re_stat) {
749 if (fsp->fh->fd == -1) {
750 ret = SMB_VFS_STAT(conn, smb_fname);
751 } else {
752 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
753 /* If we have an fd, this stat should succeed. */
754 if (ret == -1) {
755 DEBUG(0,("Error doing fstat on open file %s "
756 "(%s)\n",
757 smb_fname_str_dbg(smb_fname),
758 strerror(errno) ));
759 }
760 }
761 }
762
763 notify_fname(conn, NOTIFY_ACTION_ADDED,
764 FILE_NOTIFY_CHANGE_FILE_NAME,
765 smb_fname->base_name);
766 }
767 }
768
769 /*
770 * POSIX allows read-only opens of directories. We don't
771 * want to do this (we use a different code path for this)
772 * so catch a directory open and return an EISDIR. JRA.
773 */
774
775 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
776 fd_close(fsp);
777 errno = EISDIR;
778 return NT_STATUS_FILE_IS_A_DIRECTORY;
779 }
780
781 fsp->mode = smb_fname->st.st_ex_mode;
782 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
783 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
784 fsp->file_pid = req ? req->smbpid : 0;
785 fsp->can_lock = True;
786 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
787 if (!CAN_WRITE(conn)) {
788 fsp->can_write = False;
789 } else {
790 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
791 True : False;
792 }
793 fsp->print_file = NULL;
794 fsp->modified = False;
795 fsp->sent_oplock_break = NO_BREAK_SENT;
796 fsp->is_directory = False;
797 if (conn->aio_write_behind_list &&
798 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
799 conn->case_sensitive)) {
800 fsp->aio_write_behind = True;
801 }
802
803 fsp->wcp = NULL; /* Write cache pointer. */
804
805 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
806 conn->session_info->unix_info->unix_name,
807 smb_fname_str_dbg(smb_fname),
808 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
809 conn->num_files_open));
810
811 errno = 0;
812 return NT_STATUS_OK;
813 }
814
815 /****************************************************************************
816 Check if we can open a file with a share mode.
817 Returns True if conflict, False if not.
818 ****************************************************************************/
819
820 static bool share_conflict(struct share_mode_entry *entry,
821 uint32 access_mask,
822 uint32 share_access)
823 {
824 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
825 "entry->share_access = 0x%x, "
826 "entry->private_options = 0x%x\n",
827 (unsigned int)entry->access_mask,
828 (unsigned int)entry->share_access,
829 (unsigned int)entry->private_options));
830
831 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
832 (unsigned int)access_mask, (unsigned int)share_access));
833
834 if ((entry->access_mask & (FILE_WRITE_DATA|
835 FILE_APPEND_DATA|
836 FILE_READ_DATA|
837 FILE_EXECUTE|
838 DELETE_ACCESS)) == 0) {
839 DEBUG(10,("share_conflict: No conflict due to "
840 "entry->access_mask = 0x%x\n",
841 (unsigned int)entry->access_mask ));
842 return False;
843 }
844
845 if ((access_mask & (FILE_WRITE_DATA|
846 FILE_APPEND_DATA|
847 FILE_READ_DATA|
848 FILE_EXECUTE|
849 DELETE_ACCESS)) == 0) {
850 DEBUG(10,("share_conflict: No conflict due to "
851 "access_mask = 0x%x\n",
852 (unsigned int)access_mask ));
853 return False;
854 }
855
856 #if 1 /* JRA TEST - Superdebug. */
857 #define CHECK_MASK(num, am, right, sa, share) \
858 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
859 (unsigned int)(num), (unsigned int)(am), \
860 (unsigned int)(right), (unsigned int)(am)&(right) )); \
861 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
862 (unsigned int)(num), (unsigned int)(sa), \
863 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
864 if (((am) & (right)) && !((sa) & (share))) { \
865 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
866 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
867 (unsigned int)(share) )); \
868 return True; \
869 }
870 #else
871 #define CHECK_MASK(num, am, right, sa, share) \
872 if (((am) & (right)) && !((sa) & (share))) { \
873 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
874 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
875 (unsigned int)(share) )); \
876 return True; \
877 }
878 #endif
879
880 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
881 share_access, FILE_SHARE_WRITE);
882 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
883 entry->share_access, FILE_SHARE_WRITE);
884
885 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
886 share_access, FILE_SHARE_READ);
887 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
888 entry->share_access, FILE_SHARE_READ);
889
890 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
891 share_access, FILE_SHARE_DELETE);
892 CHECK_MASK(6, access_mask, DELETE_ACCESS,
893 entry->share_access, FILE_SHARE_DELETE);
894
895 DEBUG(10,("share_conflict: No conflict.\n"));
896 return False;
897 }
898
899 #if defined(DEVELOPER)
900 static void validate_my_share_entries(struct smbd_server_connection *sconn,
901 int num,
902 struct share_mode_entry *share_entry)
903 {
904 files_struct *fsp;
905
906 if (!procid_is_me(&share_entry->pid)) {
907 return;
908 }
909
910 if (is_deferred_open_entry(share_entry) &&
911 !open_was_deferred(sconn, share_entry->op_mid)) {
912 char *str = talloc_asprintf(talloc_tos(),
913 "Got a deferred entry without a request: "
914 "PANIC: %s\n",
915 share_mode_str(talloc_tos(), num, share_entry));
916 smb_panic(str);
917 }
918
919 if (!is_valid_share_mode_entry(share_entry)) {
920 return;
921 }
922
923 fsp = file_find_dif(sconn, share_entry->id,
924 share_entry->share_file_id);
925 if (!fsp) {
926 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
927 share_mode_str(talloc_tos(), num, share_entry) ));
928 smb_panic("validate_my_share_entries: Cannot match a "
929 "share entry with an open file\n");
930 }
931
932 if (is_deferred_open_entry(share_entry)) {
933 goto panic;
934 }
935
936 if ((share_entry->op_type == NO_OPLOCK) &&
937 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
938 /* Someone has already written to it, but I haven't yet
939 * noticed */
940 return;
941 }
942
943 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
944 goto panic;
945 }
946
947 return;
948
949 panic:
950 {
951 char *str;
952 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
953 share_mode_str(talloc_tos(), num, share_entry) ));
954 str = talloc_asprintf(talloc_tos(),
955 "validate_my_share_entries: "
956 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
957 fsp->fsp_name->base_name,
958 (unsigned int)fsp->oplock_type,
959 (unsigned int)share_entry->op_type );
960 smb_panic(str);
961 }
962 }
963 #endif
964
965 bool is_stat_open(uint32 access_mask)
966 {
967 return (access_mask &&
968 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
969 FILE_WRITE_ATTRIBUTES))==0) &&
970 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
971 FILE_WRITE_ATTRIBUTES)) != 0));
972 }
973
974 /****************************************************************************
975 Deal with share modes
976 Invarient: Share mode must be locked on entry and exit.
977 Returns -1 on error, or number of share modes on success (may be zero).
978 ****************************************************************************/
979
980 static NTSTATUS open_mode_check(connection_struct *conn,
981 struct share_mode_lock *lck,
982 uint32_t name_hash,
983 uint32 access_mask,
984 uint32 share_access,
985 uint32 create_options,
986 bool *file_existed)
987 {
988 int i;
989
990 if(lck->data->num_share_modes == 0) {
991 return NT_STATUS_OK;
992 }
993
994 *file_existed = True;
995
996 /* A delete on close prohibits everything */
997
998 if (is_delete_on_close_set(lck, name_hash)) {
999 return NT_STATUS_DELETE_PENDING;
1000 }
1001
1002 if (is_stat_open(access_mask)) {
1003 /* Stat open that doesn't trigger oplock breaks or share mode
1004 * checks... ! JRA. */
1005 return NT_STATUS_OK;
1006 }
1007
1008 /*
1009 * Check if the share modes will give us access.
1010 */
1011
1012 #if defined(DEVELOPER)
1013 for(i = 0; i < lck->data->num_share_modes; i++) {
1014 validate_my_share_entries(conn->sconn, i,
1015 &lck->data->share_modes[i]);
1016 }
1017 #endif
1018
1019 if (!lp_share_modes(SNUM(conn))) {
1020 return NT_STATUS_OK;
1021 }
1022
1023 /* Now we check the share modes, after any oplock breaks. */
1024 for(i = 0; i < lck->data->num_share_modes; i++) {
1025
1026 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1027 continue;
1028 }
1029
1030 /* someone else has a share lock on it, check to see if we can
1031 * too */
1032 if (share_conflict(&lck->data->share_modes[i],
1033 access_mask, share_access)) {
1034 return NT_STATUS_SHARING_VIOLATION;
1035 }
1036 }
1037
1038 return NT_STATUS_OK;
1039 }
1040
1041 static bool is_delete_request(files_struct *fsp) {
1042 return ((fsp->access_mask == DELETE_ACCESS) &&
1043 (fsp->oplock_type == NO_OPLOCK));
1044 }
1045
1046 /*
1047 * Send a break message to the oplock holder and delay the open for
1048 * our client.
1049 */
1050
1051 static NTSTATUS send_break_message(files_struct *fsp,
1052 struct share_mode_entry *exclusive,
1053 uint64_t mid,
1054 int oplock_request)
1055 {
1056 NTSTATUS status;
1057 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1058
1059 DEBUG(10, ("Sending break request to PID %s\n",
1060 procid_str_static(&exclusive->pid)));
1061 exclusive->op_mid = mid;
1062
1063 /* Create the message. */
1064 share_mode_entry_to_message(msg, exclusive);
1065
1066 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1067 don't want this set in the share mode struct pointed to by lck. */
1068
1069 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1070 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1071 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1072 }
1073
1074 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1075 MSG_SMB_BREAK_REQUEST,
1076 (uint8 *)msg,
1077 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1078 if (!NT_STATUS_IS_OK(status)) {
1079 DEBUG(3, ("Could not send oplock break message: %s\n",
1080 nt_errstr(status)));
1081 }
1082
1083 return status;
1084 }
1085
1086 /*
1087 * Return share_mode_entry pointers for :
1088 * 1). Batch oplock entry.
1089 * 2). Batch or exclusive oplock entry (may be identical to #1).
1090 * bool have_level2_oplock
1091 * bool have_no_oplock.
1092 * Do internal consistency checks on the share mode for a file.
1093 */
1094
1095 static void find_oplock_types(files_struct *fsp,
1096 int oplock_request,
1097 const struct share_mode_lock *lck,
1098 struct share_mode_entry **pp_batch,
1099 struct share_mode_entry **pp_ex_or_batch,
1100 bool *got_level2,
1101 bool *got_no_oplock)
1102 {
1103 int i;
1104
1105 *pp_batch = NULL;
1106 *pp_ex_or_batch = NULL;
1107 *got_level2 = false;
1108 *got_no_oplock = false;
1109
1110 /* Ignore stat or internal opens, as is done in
1111 delay_for_batch_oplocks() and
1112 delay_for_exclusive_oplocks().
1113 */
1114 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1115 return;
1116 }
1117
1118 for (i=0; i<lck->data->num_share_modes; i++) {
1119 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1120 continue;
1121 }
1122
1123 if (lck->data->share_modes[i].op_type == NO_OPLOCK &&
1124 is_stat_open(lck->data->share_modes[i].access_mask)) {
1125 /* We ignore stat opens in the table - they
1126 always have NO_OPLOCK and never get or
1127 cause breaks. JRA. */
1128 continue;
1129 }
1130
1131 if (BATCH_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1132 /* batch - can only be one. */
1133 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1134 smb_panic("Bad batch oplock entry.");
1135 }
1136 *pp_batch = &lck->data->share_modes[i];
1137 }
1138
1139 if (EXCLUSIVE_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1140 /* Exclusive or batch - can only be one. */
1141 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1142 smb_panic("Bad exclusive or batch oplock entry.");
1143 }
1144 *pp_ex_or_batch = &lck->data->share_modes[i];
1145 }
1146
1147 if (LEVEL_II_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1148 if (*pp_batch || *pp_ex_or_batch) {
1149 smb_panic("Bad levelII oplock entry.");
1150 }
1151 *got_level2 = true;
1152 }
1153
1154 if (lck->data->share_modes[i].op_type == NO_OPLOCK) {
1155 if (*pp_batch || *pp_ex_or_batch) {
1156 smb_panic("Bad no oplock entry.");
1157 }
1158 *got_no_oplock = true;
1159 }
1160 }
1161 }
1162
1163 static bool delay_for_batch_oplocks(files_struct *fsp,
1164 uint64_t mid,
1165 int oplock_request,
1166 struct share_mode_entry *batch_entry)
1167 {
1168 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1169 return false;
1170 }
1171 if (batch_entry == NULL) {
1172 return false;
1173 }
1174
1175 /* Found a batch oplock */
1176 send_break_message(fsp, batch_entry, mid, oplock_request);
1177 return true;
1178 }
1179
1180 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1181 uint64_t mid,
1182 int oplock_request,
1183 struct share_mode_entry *ex_entry)
1184 {
1185 bool delay_it;
1186
1187 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1188 return false;
1189 }
1190 if (ex_entry == NULL) {
1191 return false;
1192 }
1193
1194 /* Found an exclusive or batch oplock */
1195
1196 delay_it = is_delete_request(fsp) ?
1197 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1198
1199 if (!delay_it) {
1200 return false;
1201 }
1202
1203 send_break_message(fsp, ex_entry, mid, oplock_request);
1204 return true;
1205 }
1206
1207 static void grant_fsp_oplock_type(files_struct *fsp,
1208 const struct byte_range_lock *br_lck,
1209 int oplock_request,
1210 bool got_level2_oplock,
1211 bool got_a_none_oplock)
1212 {
1213 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1214 lp_level2_oplocks(SNUM(fsp->conn));
1215
1216 /* Start by granting what the client asked for,
1217 but ensure no SAMBA_PRIVATE bits can be set. */
1218 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1219
1220 if (oplock_request & INTERNAL_OPEN_ONLY) {
1221 /* No oplocks on internal open. */
1222 fsp->oplock_type = NO_OPLOCK;
1223 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1224 fsp->oplock_type, fsp_str_dbg(fsp)));
1225 return;
1226 } else if (br_lck && br_lck->num_locks > 0) {
1227 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1228 fsp_str_dbg(fsp)));
1229 fsp->oplock_type = NO_OPLOCK;
1230 }
1231
1232 if (is_stat_open(fsp->access_mask)) {
1233 /* Leave the value already set. */
1234 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1235 fsp->oplock_type, fsp_str_dbg(fsp)));
1236 return;
1237 }
1238
1239 /*
1240 * Match what was requested (fsp->oplock_type) with
1241 * what was found in the existing share modes.
1242 */
1243
1244 if (got_a_none_oplock) {
1245 fsp->oplock_type = NO_OPLOCK;
1246 } else if (got_level2_oplock) {
1247 if (fsp->oplock_type == NO_OPLOCK ||
1248 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1249 /* Store a level2 oplock, but don't tell the client */
1250 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1251 } else {
1252 fsp->oplock_type = LEVEL_II_OPLOCK;
1253 }
1254 } else {
1255 /* All share_mode_entries are placeholders or deferred.
1256 * Silently upgrade to fake levelII if the client didn't
1257 * ask for an oplock. */
1258 if (fsp->oplock_type == NO_OPLOCK) {
1259 /* Store a level2 oplock, but don't tell the client */
1260 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1261 }
1262 }
1263
1264 /*
1265 * Don't grant level2 to clients that don't want them
1266 * or if we've turned them off.
1267 */
1268 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1269 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1270 }
1271
1272 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1273 fsp->oplock_type, fsp_str_dbg(fsp)));
1274 }
1275
1276 bool request_timed_out(struct timeval request_time,
1277 struct timeval timeout)
1278 {
1279 struct timeval now, end_time;
1280 GetTimeOfDay(&now);
1281 end_time = timeval_sum(&request_time, &timeout);
1282 return (timeval_compare(&end_time, &now) < 0);
1283 }
1284
1285 /****************************************************************************
1286 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1287 ****************************************************************************/
1288
1289 static void defer_open(struct share_mode_lock *lck,
1290 struct timeval request_time,
1291 struct timeval timeout,
1292 struct smb_request *req,
1293 struct deferred_open_record *state)
1294 {
1295 int i;
1296
1297 /* Paranoia check */
1298
1299 for (i=0; i<lck->data->num_share_modes; i++) {
1300 struct share_mode_entry *e = &lck->data->share_modes[i];
1301
1302 if (is_deferred_open_entry(e) &&
1303 procid_is_me(&e->pid) &&
1304 (e->op_mid == req->mid)) {
1305 DEBUG(0, ("Trying to defer an already deferred "
1306 "request: mid=%llu, exiting\n",
1307 (unsigned long long)req->mid));
1308 exit_server("attempt to defer a deferred request");
1309 }
1310 }
1311
1312 /* End paranoia check */
1313
1314 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1315 "open entry for mid %llu\n",
1316 (unsigned int)request_time.tv_sec,
1317 (unsigned int)request_time.tv_usec,
1318 (unsigned long long)req->mid));
1319
1320 if (!push_deferred_open_message_smb(req, request_time, timeout,
1321 state->id, (char *)state, sizeof(*state))) {
1322 exit_server("push_deferred_open_message_smb failed");
1323 }
1324 add_deferred_open(lck, req->mid, request_time,
1325 messaging_server_id(req->sconn->msg_ctx), state->id);
1326 }
1327
1328
1329 /****************************************************************************
1330 On overwrite open ensure that the attributes match.
1331 ****************************************************************************/
1332
1333 bool open_match_attributes(connection_struct *conn,
1334 uint32 old_dos_attr,
1335 uint32 new_dos_attr,
1336 mode_t existing_unx_mode,
1337 mode_t new_unx_mode,
1338 mode_t *returned_unx_mode)
1339 {
1340 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1341
1342 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1343 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1344
1345 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1346 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1347 *returned_unx_mode = new_unx_mode;
1348 } else {
1349 *returned_unx_mode = (mode_t)0;
1350 }
1351
1352 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1353 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1354 "returned_unx_mode = 0%o\n",
1355 (unsigned int)old_dos_attr,
1356 (unsigned int)existing_unx_mode,
1357 (unsigned int)new_dos_attr,
1358 (unsigned int)*returned_unx_mode ));
1359
1360 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1361 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1362 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1363 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1364 return False;
1365 }
1366 }
1367 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1368 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1369 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1370 return False;
1371 }
1372 }
1373 return True;
1374 }
1375
1376 /****************************************************************************
1377 Special FCB or DOS processing in the case of a sharing violation.
1378 Try and find a duplicated file handle.
1379 ****************************************************************************/
1380
1381 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1382 connection_struct *conn,
1383 files_struct *fsp_to_dup_into,
1384 const struct smb_filename *smb_fname,
1385 struct file_id id,
1386 uint16 file_pid,
1387 uint16 vuid,
1388 uint32 access_mask,
1389 uint32 share_access,
1390 uint32 create_options)
1391 {
1392 files_struct *fsp;
1393
1394 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1395 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1396
1397 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1398 fsp = file_find_di_next(fsp)) {
1399
1400 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1401 "vuid = %u, file_pid = %u, private_options = 0x%x "
1402 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1403 fsp->fh->fd, (unsigned int)fsp->vuid,
1404 (unsigned int)fsp->file_pid,
1405 (unsigned int)fsp->fh->private_options,
1406 (unsigned int)fsp->access_mask ));
1407
1408 if (fsp->fh->fd != -1 &&
1409 fsp->vuid == vuid &&
1410 fsp->file_pid == file_pid &&
1411 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1412 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1413 (fsp->access_mask & FILE_WRITE_DATA) &&
1414 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1415 strequal(fsp->fsp_name->stream_name,
1416 smb_fname->stream_name)) {
1417 DEBUG(10,("fcb_or_dos_open: file match\n"));
1418 break;
1419 }
1420 }
1421
1422 if (!fsp) {
1423 return NT_STATUS_NOT_FOUND;
1424 }
1425
1426 /* quite an insane set of semantics ... */
1427 if (is_executable(smb_fname->base_name) &&
1428 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1429 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1430 return NT_STATUS_INVALID_PARAMETER;
1431 }
1432
1433 /* We need to duplicate this fsp. */
1434 return dup_file_fsp(req, fsp, access_mask, share_access,
1435 create_options, fsp_to_dup_into);
1436 }
1437
1438 static void schedule_defer_open(struct share_mode_lock *lck,
1439 struct timeval request_time,
1440 struct smb_request *req)
1441 {
1442 struct deferred_open_record state;
1443
1444 /* This is a relative time, added to the absolute
1445 request_time value to get the absolute timeout time.
1446 Note that if this is the second or greater time we enter
1447 this codepath for this particular request mid then
1448 request_time is left as the absolute time of the *first*
1449 time this request mid was processed. This is what allows
1450 the request to eventually time out. */
1451
1452 struct timeval timeout;
1453
1454 /* Normally the smbd we asked should respond within
1455 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1456 * the client did, give twice the timeout as a safety
1457 * measure here in case the other smbd is stuck
1458 * somewhere else. */
1459
1460 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1461
1462 /* Nothing actually uses state.delayed_for_oplocks
1463 but it's handy to differentiate in debug messages
1464 between a 30 second delay due to oplock break, and
1465 a 1 second delay for share mode conflicts. */
1466
1467 state.delayed_for_oplocks = True;
1468 state.id = lck->data->id;
1469
1470 if (!request_timed_out(request_time, timeout)) {
1471 defer_open(lck, request_time, timeout, req, &state);
1472 }
1473 }
1474
1475 /****************************************************************************
1476 Work out what access_mask to use from what the client sent us.
1477 ****************************************************************************/
1478
1479 static NTSTATUS smbd_calculate_maximum_allowed_access(
1480 connection_struct *conn,
1481 const struct smb_filename *smb_fname,
1482 uint32_t *p_access_mask)
1483 {
1484 struct security_descriptor *sd;
1485 uint32_t access_granted;
1486 NTSTATUS status;
1487
1488 if (get_current_uid(conn) == (uid_t)0) {
1489 *p_access_mask |= FILE_GENERIC_ALL;
1490 return NT_STATUS_OK;
1491 }
1492
1493 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1494 (SECINFO_OWNER |
1495 SECINFO_GROUP |
1496 SECINFO_DACL),&sd);
1497
1498 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1499 /*
1500 * File did not exist
1501 */
1502 *p_access_mask = FILE_GENERIC_ALL;
1503 return NT_STATUS_OK;
1504 }
1505 if (!NT_STATUS_IS_OK(status)) {
1506 DEBUG(10,("smbd_calculate_access_mask: "
1507 "Could not get acl on file %s: %s\n",
1508 smb_fname_str_dbg(smb_fname),
1509 nt_errstr(status)));
1510 return NT_STATUS_ACCESS_DENIED;
1511 }
1512
1513 /*
1514 * Never test FILE_READ_ATTRIBUTES. se_access_check()
1515 * also takes care of owner WRITE_DAC and READ_CONTROL.
1516 */
1517 status = se_access_check(sd,
1518 get_current_nttok(conn),
1519 (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1520 &access_granted);
1521
1522 TALLOC_FREE(sd);
1523
1524 if (!NT_STATUS_IS_OK(status)) {
1525 DEBUG(10, ("smbd_calculate_access_mask: "
1526 "Access denied on file %s: "
1527 "when calculating maximum access\n",
1528 smb_fname_str_dbg(smb_fname)));
1529 return NT_STATUS_ACCESS_DENIED;
1530 }
1531 *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1532 return NT_STATUS_OK;
1533 }
1534
1535 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1536 const struct smb_filename *smb_fname,
1537 uint32_t access_mask,
1538 uint32_t *access_mask_out)
1539 {
1540 NTSTATUS status;
1541 uint32_t orig_access_mask = access_mask;
1542 uint32_t rejected_share_access;
1543
1544 /*
1545 * Convert GENERIC bits to specific bits.
1546 */
1547
1548 se_map_generic(&access_mask, &file_generic_mapping);
1549
1550 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1551 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1552
1553 status = smbd_calculate_maximum_allowed_access(
1554 conn, smb_fname, &access_mask);
1555
1556 if (!NT_STATUS_IS_OK(status)) {
1557 return status;
1558 }
1559
1560 access_mask &= conn->share_access;
1561 }
1562
1563 rejected_share_access = access_mask & ~(conn->share_access);
1564
1565 if (rejected_share_access) {
1566 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1567 "file %s: rejected by share access mask[0x%08X] "
1568 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1569 smb_fname_str_dbg(smb_fname),
1570 conn->share_access,
1571 orig_access_mask, access_mask,
1572 rejected_share_access));
1573 return NT_STATUS_ACCESS_DENIED;
1574 }
1575
1576 *access_mask_out = access_mask;
1577 return NT_STATUS_OK;
1578 }
1579
1580 /****************************************************************************
1581 Remove the deferred open entry under lock.
1582 ****************************************************************************/
1583
1584 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1585 struct server_id pid)
1586 {
1587 struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id);
1588 if (lck == NULL) {
1589 DEBUG(0, ("could not get share mode lock\n"));
1590 return;
1591 }
1592 del_deferred_open_entry(lck, mid, pid);
1593 TALLOC_FREE(lck);
1594 }
1595
1596 /****************************************************************
1597 Ensure we get the brlock lock followed by the share mode lock
1598 in the correct order to prevent deadlocks if other smbd's are
1599 using the brlock database on this file simultaneously with this open
1600 (that code also gets the locks in brlock -> share mode lock order).
1601 ****************************************************************/
1602
1603 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1604 files_struct *fsp,
1605 const struct file_id id,
1606 const char *connectpath,
1607 const struct smb_filename *smb_fname,
1608 const struct timespec *p_old_write_time,
1609 struct share_mode_lock **p_lck,
1610 struct byte_range_lock **p_br_lck)
1611 {
1612 /* Ordering - we must get the br_lck for this
1613 file before the share mode. */
1614 if (lp_locking(fsp->conn->params)) {
1615 *p_br_lck = brl_get_locks_readonly(fsp);
1616 if (*p_br_lck == NULL) {
1617 DEBUG(0, ("Could not get br_lock\n"));
1618 return false;
1619 }
1620 /* Note - we don't need to free the returned
1621 br_lck explicitly as it was allocated on talloc_tos()
1622 and so will be autofreed (and release the lock)
1623 once the frame context disappears.
1624
1625 If it was set to fsp->brlock_rec then it was
1626 talloc_move'd to hang off the fsp pointer and
1627 in this case is guarenteed to not be holding the
1628 lock on the brlock database. */
1629 }
1630
1631 *p_lck = get_share_mode_lock_fresh(
1632 mem_ctx, id, connectpath, smb_fname, p_old_write_time);
1633
1634 if (*p_lck == NULL) {
1635 DEBUG(0, ("Could not get share mode lock\n"));
1636 TALLOC_FREE(*p_br_lck);
1637 return false;
1638 }
1639 return true;
1640 }
1641
1642 /****************************************************************************
1643 Open a file with a share mode. Passed in an already created files_struct *.
1644 ****************************************************************************/
1645
1646 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1647 struct smb_request *req,
1648 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1649 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1650 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1651 uint32 create_options, /* options such as delete on close. */
1652 uint32 new_dos_attributes, /* attributes used for new file. */
1653 int oplock_request, /* internal Samba oplock codes. */
1654 /* Information (FILE_EXISTS etc.) */
1655 uint32_t private_flags, /* Samba specific flags. */
1656 int *pinfo,
1657 files_struct *fsp)
1658 {
1659 struct smb_filename *smb_fname = fsp->fsp_name;
1660 int flags=0;
1661 int flags2=0;
1662 bool file_existed = VALID_STAT(smb_fname->st);
1663 bool def_acl = False;
1664 bool posix_open = False;
1665 bool new_file_created = False;
1666 bool clear_ads = false;
1667 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1668 mode_t new_unx_mode = (mode_t)0;
1669 mode_t unx_mode = (mode_t)0;
1670 int info;
1671 uint32 existing_dos_attributes = 0;
1672 struct timeval request_time = timeval_zero();
1673 struct share_mode_lock *lck = NULL;
1674 uint32 open_access_mask = access_mask;
1675 NTSTATUS status;
1676 char *parent_dir;
1677
1678 if (conn->printer) {
1679 /*
1680 * Printers are handled completely differently.
1681 * Most of the passed parameters are ignored.
1682 */
1683
1684 if (pinfo) {
1685 *pinfo = FILE_WAS_CREATED;
1686 }
1687
1688 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1689 smb_fname_str_dbg(smb_fname)));
1690
1691 if (!req) {
1692 DEBUG(0,("open_file_ntcreate: printer open without "
1693 "an SMB request!\n"));
1694 return NT_STATUS_INTERNAL_ERROR;
1695 }
1696
1697 return print_spool_open(fsp, smb_fname->base_name,
1698 req->vuid);
1699 }
1700
1701 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1702 NULL)) {
1703 return NT_STATUS_NO_MEMORY;
1704 }
1705
1706 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1707 posix_open = True;
1708 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1709 new_dos_attributes = 0;
1710 } else {
1711 /* Windows allows a new file to be created and
1712 silently removes a FILE_ATTRIBUTE_DIRECTORY
1713 sent by the client. Do the same. */
1714
1715 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1716
1717 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1718 * created new. */
1719 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1720 smb_fname, parent_dir);
1721 }
1722
1723 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1724 "access_mask=0x%x share_access=0x%x "
1725 "create_disposition = 0x%x create_options=0x%x "
1726 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1727 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1728 access_mask, share_access, create_disposition,
1729 create_options, (unsigned int)unx_mode, oplock_request,
1730 (unsigned int)private_flags));
1731
1732 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1733 DEBUG(0, ("No smb request but not an internal only open!\n"));
1734 return NT_STATUS_INTERNAL_ERROR;
1735 }
1736
1737 /*
1738 * Only non-internal opens can be deferred at all
1739 */
1740
1741 if (req) {
1742 void *ptr;
1743 if (get_deferred_open_message_state(req,
1744 &request_time,
1745 &ptr)) {
1746
1747 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1748 /* Remember the absolute time of the original
1749 request with this mid. We'll use it later to
1750 see if this has timed out. */
1751
1752 /* Remove the deferred open entry under lock. */
1753 remove_deferred_open_entry(
1754 state->id, req->mid,
1755 messaging_server_id(req->sconn->msg_ctx));
1756
1757 /* Ensure we don't reprocess this message. */
1758 remove_deferred_open_message_smb(req->sconn, req->mid);
1759 }
1760 }
1761
1762 if (!posix_open) {
1763 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1764 if (file_existed) {
1765 existing_dos_attributes = dos_mode(conn, smb_fname);
1766 }
1767 }
1768
1769 /* ignore any oplock requests if oplocks are disabled */
1770 if (!lp_oplocks(SNUM(conn)) ||
1771 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1772 /* Mask off everything except the private Samba bits. */
1773 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1774 }
1775
1776 /* this is for OS/2 long file names - say we don't support them */
1777 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1778 /* OS/2 Workplace shell fix may be main code stream in a later
1779 * release. */
1780 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1781 "supported.\n"));
1782 if (use_nt_status()) {
1783 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1784 }
1785 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1786 }
1787
1788 switch( create_disposition ) {
1789 /*
1790 * Currently we're using FILE_SUPERSEDE as the same as
1791 * FILE_OVERWRITE_IF but they really are
1792 * different. FILE_SUPERSEDE deletes an existing file
1793 * (requiring delete access) then recreates it.
1794 */
1795 case FILE_SUPERSEDE:
1796 /* If file exists replace/overwrite. If file doesn't
1797 * exist create. */
1798 flags2 |= (O_CREAT | O_TRUNC);
1799 clear_ads = true;
1800 break;
1801
1802 case FILE_OVERWRITE_IF:
1803 /* If file exists replace/overwrite. If file doesn't
1804 * exist create. */
1805 flags2 |= (O_CREAT | O_TRUNC);
1806 clear_ads = true;
1807 break;
1808
1809 case FILE_OPEN:
1810 /* If file exists open. If file doesn't exist error. */
1811 if (!file_existed) {
1812 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1813 "requested for file %s and file "
1814 "doesn't exist.\n",
1815 smb_fname_str_dbg(smb_fname)));
1816 errno = ENOENT;
1817 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1818 }
1819 break;
1820
1821 case FILE_OVERWRITE:
1822 /* If file exists overwrite. If file doesn't exist
1823 * error. */
1824 if (!file_existed) {
1825 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1826 "requested for file %s and file "
1827 "doesn't exist.\n",
1828 smb_fname_str_dbg(smb_fname) ));
1829 errno = ENOENT;
1830 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1831 }
1832 flags2 |= O_TRUNC;
1833 clear_ads = true;
1834 break;
1835
1836 case FILE_CREATE:
1837 /* If file exists error. If file doesn't exist
1838 * create. */
1839 if (file_existed) {
1840 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1841 "requested for file %s and file "
1842 "already exists.\n",
1843 smb_fname_str_dbg(smb_fname)));
1844 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1845 errno = EISDIR;
1846 } else {
1847 errno = EEXIST;
1848 }
1849 return map_nt_error_from_unix(errno);
1850 }
1851 flags2 |= (O_CREAT|O_EXCL);
1852 break;
1853
1854 case FILE_OPEN_IF:
1855 /* If file exists open. If file doesn't exist
1856 * create. */
1857 flags2 |= O_CREAT;
1858 break;
1859
1860 default:
1861 return NT_STATUS_INVALID_PARAMETER;
1862 }
1863
1864 /* We only care about matching attributes on file exists and
1865 * overwrite. */
1866
1867 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1868 (create_disposition == FILE_OVERWRITE_IF))) {
1869 if (!open_match_attributes(conn, existing_dos_attributes,
1870 new_dos_attributes,
1871 smb_fname->st.st_ex_mode,
1872 unx_mode, &new_unx_mode)) {
1873 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1874 "for file %s (%x %x) (0%o, 0%o)\n",
1875 smb_fname_str_dbg(smb_fname),
1876 existing_dos_attributes,
1877 new_dos_attributes,
1878 (unsigned int)smb_fname->st.st_ex_mode,
1879 (unsigned int)unx_mode ));
1880 errno = EACCES;
1881 return NT_STATUS_ACCESS_DENIED;
1882 }
1883 }
1884
1885 status = smbd_calculate_access_mask(conn, smb_fname,
1886 access_mask,
1887 &access_mask);
1888 if (!NT_STATUS_IS_OK(status)) {
1889 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1890 "on file %s returned %s\n",
1891 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1892 return status;
1893 }
1894
1895 open_access_mask = access_mask;
1896
1897 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1898 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1899 }
1900
1901 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1902 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1903 access_mask));
1904
1905 /*
1906 * Note that we ignore the append flag as append does not
1907 * mean the same thing under DOS and Unix.
1908 */
1909
1910 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1911 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1912 /* DENY_DOS opens are always underlying read-write on the
1913 file handle, no matter what the requested access mask
1914 says. */
1915 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1916 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1917 flags = O_RDWR;
1918 } else {
1919 flags = O_WRONLY;
1920 }
1921 } else {
1922 flags = O_RDONLY;
1923 }
1924
1925 /*
1926 * Currently we only look at FILE_WRITE_THROUGH for create options.
1927 */
1928
1929 #if defined(O_SYNC)
1930 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1931 flags2 |= O_SYNC;
1932 }
1933 #endif /* O_SYNC */
1934
1935 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1936 flags2 |= O_APPEND;
1937 }
1938
1939 if (!posix_open && !CAN_WRITE(conn)) {
1940 /*
1941 * We should really return a permission denied error if either
1942 * O_CREAT or O_TRUNC are set, but for compatibility with
1943 * older versions of Samba we just AND them out.
1944 */
1945 flags2 &= ~(O_CREAT|O_TRUNC);
1946 }
1947
1948 /*
1949 * Ensure we can't write on a read-only share or file.
1950 */
1951
1952 if (flags != O_RDONLY && file_existed &&
1953 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1954 DEBUG(5,("open_file_ntcreate: write access requested for "
1955 "file %s on read only %s\n",
1956 smb_fname_str_dbg(smb_fname),
1957 !CAN_WRITE(conn) ? "share" : "file" ));
1958 errno = EACCES;
1959 return NT_STATUS_ACCESS_DENIED;
1960 }
1961
1962 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1963 fsp->share_access = share_access;
1964 fsp->fh->private_options = private_flags;
1965 fsp->access_mask = open_access_mask; /* We change this to the
1966 * requested access_mask after
1967 * the open is done. */
1968 fsp->posix_open = posix_open;
1969
1970 /* Ensure no SAMBA_PRIVATE bits can be set. */
1971 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1972
1973 if (timeval_is_zero(&request_time)) {
1974 request_time = fsp->open_time;
1975 }
1976
1977 if (file_existed) {
1978 struct byte_range_lock *br_lck = NULL;
1979 struct share_mode_entry *batch_entry = NULL;
1980 struct share_mode_entry *exclusive_entry = NULL;
1981 bool got_level2_oplock = false;
1982 bool got_a_none_oplock = false;
1983 struct file_id id;
1984
1985 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1986 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1987
1988 if (!acquire_ordered_locks(talloc_tos(),
1989 fsp,
1990 id,
1991 conn->connectpath,
1992 smb_fname,
1993 &old_write_time,
1994 &lck,
1995 &br_lck)) {
1996 return NT_STATUS_SHARING_VIOLATION;
1997 }
1998
1999 /* Get the types we need to examine. */
2000 find_oplock_types(fsp,
2001 oplock_request,
2002 lck,
2003 &batch_entry,
2004 &exclusive_entry,
2005 &got_level2_oplock,
2006 &got_a_none_oplock);
2007
2008 /* First pass - send break only on batch oplocks. */
2009 if ((req != NULL) &&
2010 delay_for_batch_oplocks(fsp,
2011 req->mid,
2012 oplock_request,
2013 batch_entry)) {
2014 schedule_defer_open(lck, request_time, req);
2015 TALLOC_FREE(lck);
2016 return NT_STATUS_SHARING_VIOLATION;
2017 }
2018
2019 /* Use the client requested access mask here, not the one we
2020 * open with. */
2021 status = open_mode_check(conn, lck, fsp->name_hash,
2022 access_mask, share_access,
2023 create_options, &file_existed);
2024
2025 if (NT_STATUS_IS_OK(status)) {
2026 /* We might be going to allow this open. Check oplock
2027 * status again. */
2028 /* Second pass - send break for both batch or
2029 * exclusive oplocks. */
2030 if ((req != NULL) &&
2031 delay_for_exclusive_oplocks(
2032 fsp,
2033 req->mid,
2034 oplock_request,
2035 exclusive_entry)) {
2036 schedule_defer_open(lck, request_time, req);
2037 TALLOC_FREE(lck);
2038 return NT_STATUS_SHARING_VIOLATION;
2039 }
2040 }
2041
2042 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2043 /* DELETE_PENDING is not deferred for a second */
2044 TALLOC_FREE(lck);
2045 return status;
2046 }
2047
2048 grant_fsp_oplock_type(fsp,
2049 br_lck,
2050 oplock_request,
2051 got_level2_oplock,
2052 got_a_none_oplock);
2053
2054 if (!NT_STATUS_IS_OK(status)) {
2055 uint32 can_access_mask;
2056 bool can_access = True;
2057
2058 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2059
2060 /* Check if this can be done with the deny_dos and fcb
2061 * calls. */
2062 if (private_flags &
2063 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2064 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2065 if (req == NULL) {
2066 DEBUG(0, ("DOS open without an SMB "
2067 "request!\n"));
2068 TALLOC_FREE(lck);
2069 return NT_STATUS_INTERNAL_ERROR;
2070 }
2071
2072 /* Use the client requested access mask here,
2073 * not the one we open with. */
2074 status = fcb_or_dos_open(req,
2075 conn,
2076 fsp,
2077 smb_fname,
2078 id,
2079 req->smbpid,
2080 req->vuid,
2081 access_mask,
2082 share_access,
2083 create_options);
2084
2085 if (NT_STATUS_IS_OK(status)) {
2086 TALLOC_FREE(lck);
2087 if (pinfo) {
2088 *pinfo = FILE_WAS_OPENED;
2089 }
2090 return NT_STATUS_OK;
2091 }
2092 }
2093
2094 /*
2095 * This next line is a subtlety we need for
2096 * MS-Access. If a file open will fail due to share
2097 * permissions and also for security (access) reasons,
2098 * we need to return the access failed error, not the
2099 * share error. We can't open the file due to kernel
2100 * oplock deadlock (it's possible we failed above on
2101 * the open_mode_check()) so use a userspace check.
2102 */
2103
2104 if (flags & O_RDWR) {
2105 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2106 } else if (flags & O_WRONLY) {
2107 can_access_mask = FILE_WRITE_DATA;
2108 } else {
2109 can_access_mask = FILE_READ_DATA;
2110 }
2111
2112 if (((can_access_mask & FILE_WRITE_DATA) &&
2113 !CAN_WRITE(conn)) ||
2114 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2115 smb_fname, can_access_mask))) {
2116 can_access = False;
2117 }
2118
2119 /*
2120 * If we're returning a share violation, ensure we
2121 * cope with the braindead 1 second delay.
2122 */
2123
2124 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2125 lp_defer_sharing_violations()) {
2126 struct timeval timeout;
2127 struct deferred_open_record state;
2128 int timeout_usecs;
2129
2130 /* this is a hack to speed up torture tests
2131 in 'make test' */
2132 timeout_usecs = lp_parm_int(SNUM(conn),
2133 "smbd","sharedelay",
2134 SHARING_VIOLATION_USEC_WAIT);
2135
2136 /* This is a relative time, added to the absolute
2137 request_time value to get the absolute timeout time.
2138 Note that if this is the second or greater time we enter
2139 this codepath for this particular request mid then
2140 request_time is left as the absolute time of the *first*
2141 time this request mid was processed. This is what allows
2142 the request to eventually time out. */
2143
2144 timeout = timeval_set(0, timeout_usecs);
2145
2146 /* Nothing actually uses state.delayed_for_oplocks
2147 but it's handy to differentiate in debug messages
2148 between a 30 second delay due to oplock break, and
2149 a 1 second delay for share mode conflicts. */
2150
2151 state.delayed_for_oplocks = False;
2152 state.id = id;
2153
2154 if ((req != NULL)
2155 && !request_timed_out(request_time,
2156 timeout)) {
2157 defer_open(lck, request_time, timeout,
2158 req, &state);
2159 }
2160 }
2161
2162 TALLOC_FREE(lck);
2163 if (can_access) {
2164 /*
2165 * We have detected a sharing violation here
2166 * so return the correct error code
2167 */
2168 status = NT_STATUS_SHARING_VIOLATION;
2169 } else {
2170 status = NT_STATUS_ACCESS_DENIED;
2171 }
2172 return status;
2173 }
2174
2175 /*
2176 * We exit this block with the share entry *locked*.....
2177 */
2178 }
2179
2180 SMB_ASSERT(!file_existed || (lck != NULL));
2181
2182 /*
2183 * Ensure we pay attention to default ACLs on directories if required.
2184 */
2185
2186 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2187 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2188 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2189 }
2190
2191 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2192 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2193 (unsigned int)flags, (unsigned int)flags2,
2194 (unsigned int)unx_mode, (unsigned int)access_mask,
2195 (unsigned int)open_access_mask));
2196
2197 /*
2198 * open_file strips any O_TRUNC flags itself.
2199 */
2200
2201 fsp_open = open_file(fsp, conn, req, parent_dir,
2202 flags|flags2, unx_mode, access_mask,
2203 open_access_mask);
2204
2205 if (!NT_STATUS_IS_OK(fsp_open)) {
2206 TALLOC_FREE(lck);
2207 return fsp_open;
2208 }
2209
2210 if (!file_existed) {
2211 struct byte_range_lock *br_lck = NULL;
2212 struct share_mode_entry *batch_entry = NULL;
2213 struct share_mode_entry *exclusive_entry = NULL;
2214 bool got_level2_oplock = false;
2215 bool got_a_none_oplock = false;
2216 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2217 struct file_id id;
2218 /*
2219 * Deal with the race condition where two smbd's detect the
2220 * file doesn't exist and do the create at the same time. One
2221 * of them will win and set a share mode, the other (ie. this
2222 * one) should check if the requested share mode for this
2223 * create is allowed.
2224 */
2225
2226 /*
2227 * Now the file exists and fsp is successfully opened,
2228 * fsp->dev and fsp->inode are valid and should replace the
2229 * dev=0,inode=0 from a non existent file. Spotted by
2230 * Nadav Danieli <nadavd@exanet.com>. JRA.
2231 */
2232
2233 id = fsp->file_id;
2234
2235 if (!acquire_ordered_locks(talloc_tos(),
2236 fsp,
2237 id,
2238 conn->connectpath,
2239 smb_fname,
2240 &old_write_time,
2241 &lck,
2242 &br_lck)) {
2243 return NT_STATUS_SHARING_VIOLATION;
2244 }
2245
2246 /* Get the types we need to examine. */
2247 find_oplock_types(fsp,
2248 oplock_request,
2249 lck,
2250 &batch_entry,
2251 &exclusive_entry,
2252 &got_level2_oplock,
2253 &got_a_none_oplock);
2254
2255 /* First pass - send break only on batch oplocks. */
2256 if ((req != NULL) &&
2257 delay_for_batch_oplocks(fsp,
2258 req->mid,
2259 oplock_request,
2260 batch_entry)) {
2261 schedule_defer_open(lck, request_time, req);
2262 TALLOC_FREE(lck);
2263 fd_close(fsp);
2264 return NT_STATUS_SHARING_VIOLATION;
2265 }
2266
2267 status = open_mode_check(conn, lck, fsp->name_hash,
2268 access_mask, share_access,
2269 create_options, &file_existed);
2270
2271 if (NT_STATUS_IS_OK(status)) {
2272 /* We might be going to allow this open. Check oplock
2273 * status again. */
2274 /* Second pass - send break for both batch or
2275 * exclusive oplocks. */
2276 if ((req != NULL) &&
2277 delay_for_exclusive_oplocks(
2278 fsp,
2279 req->mid,
2280 oplock_request,
2281 exclusive_entry)) {
2282 schedule_defer_open(lck, request_time, req);
2283 TALLOC_FREE(lck);
2284 fd_close(fsp);
2285 return NT_STATUS_SHARING_VIOLATION;
2286 }
2287 }
2288
2289 if (!NT_STATUS_IS_OK(status)) {
2290 struct deferred_open_record state;
2291
2292 state.delayed_for_oplocks = False;
2293 state.id = id;
2294
2295 /* Do it all over again immediately. In the second
2296 * round we will find that the file existed and handle
2297 * the DELETE_PENDING and FCB cases correctly. No need
2298 * to duplicate the code here. Essentially this is a
2299 * "goto top of this function", but don't tell
2300 * anybody... */
2301
2302 if (req != NULL) {
2303 defer_open(lck, request_time, timeval_zero(),
2304 req, &state);
2305 }
2306 TALLOC_FREE(lck);
2307 fd_close(fsp);
2308 return status;
2309 }
2310
2311 grant_fsp_oplock_type(fsp,
2312 br_lck,
2313 oplock_request,
2314 got_level2_oplock,
2315 got_a_none_oplock);
2316
2317 /*
2318 * We exit this block with the share entry *locked*.....
2319 */
2320
2321 }
2322
2323 SMB_ASSERT(lck != NULL);
2324
2325 /* Delete streams if create_disposition requires it */
2326 if (file_existed && clear_ads &&
2327 !is_ntfs_stream_smb_fname(smb_fname)) {
2328 status = delete_all_streams(conn, smb_fname->base_name);
2329 if (!NT_STATUS_IS_OK(status)) {
2330 TALLOC_FREE(lck);
2331 fd_close(fsp);
2332 return status;
2333 }
2334 }
2335
2336 /* note that we ignore failure for the following. It is
2337 basically a hack for NFS, and NFS will never set one of
2338 these only read them. Nobody but Samba can ever set a deny
2339 mode and we have already checked our more authoritative
2340 locking database for permission to set this deny mode. If
2341 the kernel refuses the operations then the kernel is wrong.
2342 note that GPFS supports it as well - jmcd */
2343
2344 if (fsp->fh->fd != -1) {
2345 int ret_flock;
2346 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2347 if(ret_flock == -1 ){
2348
2349 TALLOC_FREE(lck);
2350 fd_close(fsp);
2351
2352 return NT_STATUS_SHARING_VIOLATION;
2353 }
2354 }
2355
2356 /*
2357 * At this point onwards, we can guarentee that the share entry
2358 * is locked, whether we created the file or not, and that the
2359 * deny mode is compatible with all current opens.
2360 */
2361
2362 /*
2363 * If requested, truncate the file.
2364 */
2365
2366 if (file_existed && (flags2&O_TRUNC)) {
2367 /*
2368 * We are modifing the file after open - update the stat
2369 * struct..
2370 */
2371 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2372 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2373 status = map_nt_error_from_unix(errno);
2374 TALLOC_FREE(lck);
2375 fd_close(fsp);
2376 return status;
2377 }
2378 }
2379
2380 /*
2381 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2382 * but we don't have to store this - just ignore it on access check.
2383 */
2384 if (conn->sconn->using_smb2) {
2385 /*
2386 * SMB2 doesn't return it (according to Microsoft tests).
2387 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2388 * File created with access = 0x7 (Read, Write, Delete)
2389 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2390 */
2391 fsp->access_mask = access_mask;
2392 } else {
2393 /* But SMB1 does. */
2394 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2395 }
2396
2397 if (file_existed) {
2398 /* stat opens on existing files don't get oplocks. */
2399 if (is_stat_open(open_access_mask)) {
2400 fsp->oplock_type = NO_OPLOCK;
2401 }
2402
2403 if (flags2 & O_TRUNC) {
2404 info = FILE_WAS_OVERWRITTEN;
2405 } else {
2406 info = FILE_WAS_OPENED;
2407 }
2408 } else {
2409 info = FILE_WAS_CREATED;
2410 }
2411
2412 if (pinfo) {
2413 *pinfo = info;
2414 }
2415
2416 /*
2417 * Setup the oplock info in both the shared memory and
2418 * file structs.
2419 */
2420
2421 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2422 /*
2423 * Could not get the kernel oplock or there are byte-range
2424 * locks on the file.
2425 */
2426 fsp->oplock_type = NO_OPLOCK;
2427 }
2428
2429 set_share_mode(lck, fsp, get_current_uid(conn),
2430 req ? req->mid : 0,
2431 fsp->oplock_type);
2432
2433 /* Handle strange delete on close create semantics. */
2434 if (create_options & FILE_DELETE_ON_CLOSE) {
2435
2436 status = can_set_delete_on_close(fsp, new_dos_attributes);
2437
2438 if (!NT_STATUS_IS_OK(status)) {
2439 /* Remember to delete the mode we just added. */
2440 del_share_mode(lck, fsp);
2441 TALLOC_FREE(lck);
2442 fd_close(fsp);
2443 return status;
2444 }
2445 /* Note that here we set the *inital* delete on close flag,
2446 not the regular one. The magic gets handled in close. */
2447 fsp->initial_delete_on_close = True;
2448 }
2449
2450 if (info == FILE_WAS_OVERWRITTEN
2451 || info == FILE_WAS_CREATED
2452 || info == FILE_WAS_SUPERSEDED) {
2453 new_file_created = True;
2454 }
2455
2456 if (new_file_created) {
2457 /* Files should be initially set as archive */
2458 if (lp_map_archive(SNUM(conn)) ||
2459 lp_store_dos_attributes(SNUM(conn))) {
2460 if (!posix_open) {
2461 if (file_set_dosmode(conn, smb_fname,
2462 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2463 parent_dir, true) == 0) {
2464 unx_mode = smb_fname->st.st_ex_mode;
2465 }
2466 }
2467 }
2468 }
2469
2470 /* Determine sparse flag. */
2471 if (posix_open) {
2472 /* POSIX opens are sparse by default. */
2473 fsp->is_sparse = true;
2474 } else {
2475 fsp->is_sparse = (file_existed &&
2476 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2477 }
2478
2479 /*
2480 * Take care of inherited ACLs on created files - if default ACL not
2481 * selected.
2482 */
2483
2484 if (!posix_open && !file_existed && !def_acl) {
2485
2486 int saved_errno = errno; /* We might get ENOSYS in the next
2487 * call.. */
2488
2489 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2490 errno == ENOSYS) {
2491 errno = saved_errno; /* Ignore ENOSYS */
2492 }
2493
2494 } else if (new_unx_mode) {
2495
2496 int ret = -1;
2497
2498 /* Attributes need changing. File already existed. */
2499
2500 {
2501 int saved_errno = errno; /* We might get ENOSYS in the
2502 * next call.. */
2503 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2504
2505 if (ret == -1 && errno == ENOSYS) {
2506 errno = saved_errno; /* Ignore ENOSYS */
2507 } else {
2508 DEBUG(5, ("open_file_ntcreate: reset "
2509 "attributes of file %s to 0%o\n",
2510 smb_fname_str_dbg(smb_fname),
2511 (unsigned int)new_unx_mode));
2512 ret = 0; /* Don't do the fchmod below. */
2513 }
2514 }
2515
2516 if ((ret == -1) &&
2517 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2518 DEBUG(5, ("open_file_ntcreate: failed to reset "
2519 "attributes of file %s to 0%o\n",
2520 smb_fname_str_dbg(smb_fname),
2521 (unsigned int)new_unx_mode));
2522 }
2523
2524 /* If this is a successful open, we must remove any deferred open
2525 * records. */
2526 if (req != NULL) {
2527 del_deferred_open_entry(lck, req->mid,
2528 messaging_server_id(req->sconn->msg_ctx));
2529 }
2530 TALLOC_FREE(lck);
2531
2532 return NT_STATUS_OK;
2533 }
2534
2535
2536 /****************************************************************************
2537 Open a file for for write to ensure that we can fchmod it.
2538 ****************************************************************************/
2539
2540 NTSTATUS open_file_fchmod(connection_struct *conn,
2541 struct smb_filename *smb_fname,
2542 files_struct **result)
2543 {
2544 if (!VALID_STAT(smb_fname->st)) {
2545 return NT_STATUS_INVALID_PARAMETER;
2546 }
2547
2548 return SMB_VFS_CREATE_FILE(
2549 conn, /* conn */
2550 NULL, /* req */
2551 0, /* root_dir_fid */
2552 smb_fname, /* fname */
2553 FILE_WRITE_DATA, /* access_mask */
2554 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2555 FILE_SHARE_DELETE),
2556 FILE_OPEN, /* create_disposition*/
2557 0, /* create_options */
2558 0, /* file_attributes */
2559 INTERNAL_OPEN_ONLY, /* oplock_request */
2560 0, /* allocation_size */
2561 0, /* private_flags */
2562 NULL, /* sd */
2563 NULL, /* ea_list */
2564 result, /* result */
2565 NULL); /* pinfo */
2566 }
2567
2568 static NTSTATUS mkdir_internal(connection_struct *conn,
2569 struct smb_filename *smb_dname,
2570 uint32 file_attributes)
2571 {
2572 mode_t mode;
2573 char *parent_dir = NULL;
2574 NTSTATUS status;
2575 bool posix_open = false;
2576 bool need_re_stat = false;
2577 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2578
2579 if(access_mask & ~(conn->share_access)) {
2580 DEBUG(5,("mkdir_internal: failing share access "
2581 "%s\n", lp_servicename(SNUM(conn))));
2582 return NT_STATUS_ACCESS_DENIED;
2583 }
2584
2585 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2586 NULL)) {
2587 return NT_STATUS_NO_MEMORY;
2588 }
2589
2590 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2591 posix_open = true;
2592 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2593 } else {
2594 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2595 }
2596
2597 status = check_parent_access(conn,
2598 smb_dname,
2599 access_mask,
2600 &parent_dir);
2601 if(!NT_STATUS_IS_OK(status)) {
2602 DEBUG(5,("mkdir_internal: check_parent_access "
2603 "on directory %s for path %s returned %s\n",
2604 parent_dir,
2605 smb_dname->base_name,
2606 nt_errstr(status) ));
2607 return status;
2608 }
2609
2610 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2611 return map_nt_error_from_unix(errno);
2612 }
2613
2614 /* Ensure we're checking for a symlink here.... */
2615 /* We don't want to get caught by a symlink racer. */
2616
2617 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2618 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2619 smb_fname_str_dbg(smb_dname), strerror(errno)));
2620 return map_nt_error_from_unix(errno);
2621 }
2622
2623 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2624 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2625 smb_fname_str_dbg(smb_dname)));
2626 return NT_STATUS_NOT_A_DIRECTORY;
2627 }
2628
2629 if (lp_store_dos_attributes(SNUM(conn))) {
2630 if (!posix_open) {
2631 file_set_dosmode(conn, smb_dname,
2632 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2633 parent_dir, true);
2634 }
2635 }
2636
2637 if (lp_inherit_perms(SNUM(conn))) {
2638 inherit_access_posix_acl(conn, parent_dir,
2639 smb_dname->base_name, mode);
2640 need_re_stat = true;
2641 }
2642
2643 if (!posix_open) {
2644 /*
2645 * Check if high bits should have been set,
2646 * then (if bits are missing): add them.
2647 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2648 * dir.
2649 */
2650 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2651 (mode & ~smb_dname->st.st_ex_mode)) {
2652 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2653 (smb_dname->st.st_ex_mode |
2654 (mode & ~smb_dname->st.st_ex_mode)));
2655 need_re_stat = true;
2656 }
2657 }
2658
2659 /* Change the owner if required. */
2660 if (lp_inherit_owner(SNUM(conn))) {
2661 change_dir_owner_to_parent(conn, parent_dir,
2662 smb_dname->base_name,
2663 &smb_dname->st);
2664 need_re_stat = true;
2665 }
2666
2667 if (need_re_stat) {
2668 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2669 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2670 smb_fname_str_dbg(smb_dname), strerror(errno)));
2671 return map_nt_error_from_unix(errno);
2672 }
2673 }
2674
2675 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2676 smb_dname->base_name);
2677
2678 return NT_STATUS_OK;
2679 }
2680
2681 /****************************************************************************
2682 Ensure we didn't get symlink raced on opening a directory.
2683 ****************************************************************************/
2684
2685 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2686 const SMB_STRUCT_STAT *sbuf2)
2687 {
2688 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2689 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2690 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2691 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2692 return false;
2693 }
2694 return true;
2695 }
2696
2697 /****************************************************************************
2698 Open a directory from an NT SMB call.
2699 ****************************************************************************/
2700
2701 static NTSTATUS open_directory(connection_struct *conn,
2702 struct smb_request *req,
2703 struct smb_filename *smb_dname,
2704 uint32 access_mask,
2705 uint32 share_access,
2706 uint32 create_disposition,
2707 uint32 create_options,
2708 uint32 file_attributes,
2709 int *pinfo,
2710 files_struct **result)
2711 {
2712 files_struct *fsp = NULL;
2713 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2714 struct share_mode_lock *lck = NULL;
2715 NTSTATUS status;
2716 struct timespec mtimespec;
2717 int info = 0;
2718
2719 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2720
2721 /* Ensure we have a directory attribute. */
2722 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2723
2724 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2725 "share_access = 0x%x create_options = 0x%x, "
2726 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2727 smb_fname_str_dbg(smb_dname),
2728 (unsigned int)access_mask,
2729 (unsigned int)share_access,
2730 (unsigned int)create_options,
2731 (unsigned int)create_disposition,
2732 (unsigned int)file_attributes));
2733
2734 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2735 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2736 is_ntfs_stream_smb_fname(smb_dname)) {
2737 DEBUG(2, ("open_directory: %s is a stream name!\n",
2738 smb_fname_str_dbg(smb_dname)));
2739 return NT_STATUS_NOT_A_DIRECTORY;
2740 }
2741
2742 status = smbd_calculate_access_mask(conn, smb_dname,
2743 access_mask, &access_mask);
2744 if (!NT_STATUS_IS_OK(status)) {
2745 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2746 "on file %s returned %s\n",
2747 smb_fname_str_dbg(smb_dname),
2748 nt_errstr(status)));
2749 return status;
2750 }
2751
2752 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2753 !security_token_has_privilege(get_current_nttok(conn),
2754 SEC_PRIV_SECURITY)) {
2755 DEBUG(10, ("open_directory: open on %s "
2756 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2757 smb_fname_str_dbg(smb_dname)));
2758 return NT_STATUS_PRIVILEGE_NOT_HELD;
2759 }
2760
2761 switch( create_disposition ) {
2762 case FILE_OPEN:
2763
2764 if (!dir_existed) {
2765 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2766 }
2767
2768 info = FILE_WAS_OPENED;
2769 break;
2770
2771 case FILE_CREATE:
2772
2773 /* If directory exists error. If directory doesn't
2774 * exist create. */
2775
2776 if (dir_existed) {
2777 status = NT_STATUS_OBJECT_NAME_COLLISION;
2778 DEBUG(2, ("open_directory: unable to create "
2779 "%s. Error was %s\n",
2780 smb_fname_str_dbg(smb_dname),
2781 nt_errstr(status)));
2782 return status;
2783 }
2784
2785 status = mkdir_internal(conn, smb_dname,
2786 file_attributes);
2787
2788 if (!NT_STATUS_IS_OK(status)) {
2789 DEBUG(2, ("open_directory: unable to create "
2790 "%s. Error was %s\n",
2791 smb_fname_str_dbg(smb_dname),
2792 nt_errstr(status)));
2793 return status;
2794 }
2795
2796 info = FILE_WAS_CREATED;
2797 break;
2798
2799 case FILE_OPEN_IF:
2800 /*
2801 * If directory exists open. If directory doesn't
2802 * exist create.
2803 */
2804
2805 if (dir_existed) {
2806 status = NT_STATUS_OK;
2807 info = FILE_WAS_OPENED;
2808 } else {
2809 status = mkdir_internal(conn, smb_dname,
2810 file_attributes);
2811
2812 if (NT_STATUS_IS_OK(status)) {
2813 info = FILE_WAS_CREATED;
2814 } else {
2815 /* Cope with create race. */
2816 if (!NT_STATUS_EQUAL(status,
2817 NT_STATUS_OBJECT_NAME_COLLISION)) {
2818 DEBUG(2, ("open_directory: unable to create "
2819 "%s. Error was %s\n",
2820 smb_fname_str_dbg(smb_dname),
2821 nt_errstr(status)));
2822 return status;
2823 }
2824 info = FILE_WAS_OPENED;
2825 }
2826 }
2827
2828 break;
2829
2830 case FILE_SUPERSEDE:
2831 case FILE_OVERWRITE:
2832 case FILE_OVERWRITE_IF:
2833 default:
2834 DEBUG(5,("open_directory: invalid create_disposition "
2835 "0x%x for directory %s\n",
2836 (unsigned int)create_disposition,
2837 smb_fname_str_dbg(smb_dname)));
2838 return NT_STATUS_INVALID_PARAMETER;
2839 }
2840
2841 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2842 DEBUG(5,("open_directory: %s is not a directory !\n",
2843 smb_fname_str_dbg(smb_dname)));
2844 return NT_STATUS_NOT_A_DIRECTORY;
2845 }
2846
2847 if (info == FILE_WAS_OPENED) {
2848 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2849 if (!NT_STATUS_IS_OK(status)) {
2850 DEBUG(10, ("open_directory: smbd_check_access_rights on "
2851 "file %s failed with %s\n",
2852 smb_fname_str_dbg(smb_dname),
2853 nt_errstr(status)));
2854 return status;
2855 }
2856 }
2857
2858 status = file_new(req, conn, &fsp);
2859 if(!NT_STATUS_IS_OK(status)) {
2860 return status;
2861 }
2862
2863 /*
2864 * Setup the files_struct for it.
2865 */
2866
2867 fsp->mode = smb_dname->st.st_ex_mode;
2868 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2869 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2870 fsp->file_pid = req ? req->smbpid : 0;
2871 fsp->can_lock = False;
2872 fsp->can_read = False;
2873 fsp->can_write = False;
2874
2875 fsp->share_access = share_access;
2876 fsp->fh->private_options = 0;
2877 /*
2878 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2879 */
2880 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2881 fsp->print_file = NULL;
2882 fsp->modified = False;
2883 fsp->oplock_type = NO_OPLOCK;
2884 fsp->sent_oplock_break = NO_BREAK_SENT;
2885 fsp->is_directory = True;
2886 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2887 status = fsp_set_smb_fname(fsp, smb_dname);
2888 if (!NT_STATUS_IS_OK(status)) {
2889 file_free(req, fsp);
2890 return status;
2891 }
2892
2893 mtimespec = smb_dname->st.st_ex_mtime;
2894
2895 #ifdef O_DIRECTORY
2896 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2897 #else
2898 /* POSIX allows us to open a directory with O_RDONLY. */
2899 status = fd_open(conn, fsp, O_RDONLY, 0);
2900 #endif
2901 if (!NT_STATUS_IS_OK(status)) {
2902 DEBUG(5, ("open_directory: Could not open fd for "
2903 "%s (%s)\n",
2904 smb_fname_str_dbg(smb_dname),
2905 nt_errstr(status)));
2906 file_free(req, fsp);
2907 return status;
2908 }
2909
2910 status = vfs_stat_fsp(fsp);
2911 if (!NT_STATUS_IS_OK(status)) {
2912 fd_close(fsp);
2913 file_free(req, fsp);
2914 return status;
2915 }
2916
2917 /* Ensure there was no race condition. */
2918 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2919 DEBUG(5,("open_directory: stat struct differs for "
2920 "directory %s.\n",
2921 smb_fname_str_dbg(smb_dname)));
2922 fd_close(fsp);
2923 file_free(req, fsp);
2924 return NT_STATUS_ACCESS_DENIED;
2925 }
2926
2927 lck = get_share_mode_lock_fresh(talloc_tos(), fsp->file_id,
2928 conn->connectpath, smb_dname,
2929 &mtimespec);
2930
2931 if (lck == NULL) {
2932 DEBUG(0, ("open_directory: Could not get share mode lock for "
2933 "%s\n", smb_fname_str_dbg(smb_dname)));
2934 fd_close(fsp);
2935 file_free(req, fsp);
2936 return NT_STATUS_SHARING_VIOLATION;
2937 }
2938
2939 status = open_mode_check(conn, lck, fsp->name_hash,
2940 access_mask, share_access,
2941 create_options, &dir_existed);
2942
2943 if (!NT_STATUS_IS_OK(status)) {
2944 TALLOC_FREE(lck);
2945 fd_close(fsp);
2946 file_free(req, fsp);
2947 return status;
2948 }
2949
2950 set_share_mode(lck, fsp, get_current_uid(conn),
2951 req ? req->mid : 0, NO_OPLOCK);
2952
2953 /* For directories the delete on close bit at open time seems
2954 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2955 if (create_options & FILE_DELETE_ON_CLOSE) {
2956 status = can_set_delete_on_close(fsp, 0);
2957 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2958 TALLOC_FREE(lck);
2959 fd_close(fsp);
2960 file_free(req, fsp);
2961 return status;
2962 }
2963
2964 if (NT_STATUS_IS_OK(status)) {
2965 /* Note that here we set the *inital* delete on close flag,
2966 not the regular one. The magic gets handled in close. */
2967 fsp->initial_delete_on_close = True;
2968 }
2969 }
2970
2971 TALLOC_FREE(lck);
2972
2973 if (pinfo) {
2974 *pinfo = info;
2975 }
2976
2977 *result = fsp;
2978 return NT_STATUS_OK;
2979 }
2980
2981 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2982 struct smb_filename *smb_dname)
2983 {
2984 NTSTATUS status;
2985 files_struct *fsp;
2986
2987 status = SMB_VFS_CREATE_FILE(
2988 conn, /* conn */
2989 req, /* req */
2990 0, /* root_dir_fid */
2991 smb_dname, /* fname */
2992 FILE_READ_ATTRIBUTES, /* access_mask */
2993 FILE_SHARE_NONE, /* share_access */
2994 FILE_CREATE, /* create_disposition*/
2995 FILE_DIRECTORY_FILE, /* create_options */
2996 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2997 0, /* oplock_request */
2998 0, /* allocation_size */
2999 0, /* private_flags */
3000 NULL, /* sd */
3001 NULL, /* ea_list */
3002 &fsp, /* result */
3003 NULL); /* pinfo */
3004
3005 if (NT_STATUS_IS_OK(status)) {
3006 close_file(req, fsp, NORMAL_CLOSE);
3007 }
3008
3009 return status;
3010 }
3011
3012 /****************************************************************************
3013 Receive notification that one of our open files has been renamed by another
3014 smbd process.
3015 ****************************************************************************/
3016
3017 void msg_file_was_renamed(struct messaging_context *msg,
3018 void *private_data,
3019 uint32_t msg_type,
3020 struct server_id server_id,
3021 DATA_BLOB *data)
3022 {
3023 files_struct *fsp;
3024 char *frm = (char *)data->data;
3025 struct file_id id;
3026 const char *sharepath;
3027 const char *base_name;
3028 const char *stream_name;
3029 struct smb_filename *smb_fname = NULL;
3030 size_t sp_len, bn_len;
3031 NTSTATUS status;
3032 struct smbd_server_connection *sconn =
3033 talloc_get_type_abort(private_data,
3034 struct smbd_server_connection);
3035
3036 if (data->data == NULL
3037 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3038 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3039 (int)data->length));
3040 return;
3041 }
3042
3043 /* Unpack the message. */
3044 pull_file_id_24(frm, &id);
3045 sharepath = &frm[24];
3046 sp_len = strlen(sharepath);
3047 base_name = sharepath + sp_len + 1;
3048 bn_len = strlen(base_name);
3049 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3050
3051 /* stream_name must always be NULL if there is no stream. */
3052 if (stream_name[0] == '\0') {
3053 stream_name = NULL;
3054 }
3055
3056 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3057 stream_name, NULL, &smb_fname);
3058 if (!NT_STATUS_IS_OK(status)) {
3059 return;
3060 }
3061
3062 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3063 "file_id %s\n",
3064 sharepath, smb_fname_str_dbg(smb_fname),
3065 file_id_string_tos(&id)));
3066
3067 for(fsp = file_find_di_first(sconn, id); fsp;
3068 fsp = file_find_di_next(fsp)) {
3069 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3070
3071 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3072 fsp->fnum, fsp_str_dbg(fsp),
3073 smb_fname_str_dbg(smb_fname)));
3074 status = fsp_set_smb_fname(fsp, smb_fname);
3075 if (!NT_STATUS_IS_OK(status)) {
3076 goto out;
3077 }
3078 } else {
3079 /* TODO. JRA. */
3080 /* Now we have the complete path we can work out if this is
3081 actually within this share and adjust newname accordingly. */
3082 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3083 "not sharepath %s) "
3084 "fnum %d from %s -> %s\n",
3085 fsp->conn->connectpath,
3086 sharepath,
3087 fsp->fnum,
3088 fsp_str_dbg(fsp),
3089 smb_fname_str_dbg(smb_fname)));
3090 }
3091 }
3092 out:
3093 TALLOC_FREE(smb_fname);
3094 return;
3095 }
3096
3097 /*
3098 * If a main file is opened for delete, all streams need to be checked for
3099 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3100 * If that works, delete them all by setting the delete on close and close.
3101 */
3102
3103 NTSTATUS open_streams_for_delete(connection_struct *conn,
3104 const char *fname)
3105 {
3106 struct stream_struct *stream_info = NULL;
3107 files_struct **streams = NULL;
3108 int i;
3109 unsigned int num_streams = 0;
3110 TALLOC_CTX *frame = talloc_stackframe();
3111 NTSTATUS status;
3112
3113 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3114 &num_streams, &stream_info);
3115
3116 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3117 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3118 DEBUG(10, ("no streams around\n"));
3119 TALLOC_FREE(frame);
3120 return NT_STATUS_OK;
3121 }
3122
3123 if (!NT_STATUS_IS_OK(status)) {
3124 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3125 nt_errstr(status)));
3126 goto fail;
3127 }
3128
3129 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3130 num_streams));
3131
3132 if (num_streams == 0) {
3133 TALLOC_FREE(frame);
3134 return NT_STATUS_OK;
3135 }
3136
3137 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3138 if (streams == NULL) {
3139 DEBUG(0, ("talloc failed\n"));
3140 status = NT_STATUS_NO_MEMORY;
3141 goto fail;
3142 }
3143
3144 for (i=0; i<num_streams; i++) {
3145 struct smb_filename *smb_fname = NULL;
3146
3147 if (strequal(stream_info[i].name, "::$DATA")) {
3148 streams[i] = NULL;
3149 continue;
3150 }
3151
3152 status = create_synthetic_smb_fname(talloc_tos(), fname,
3153 stream_info[i].name,
3154 NULL, &smb_fname);
3155 if (!NT_STATUS_IS_OK(status)) {
3156 goto fail;
3157 }
3158
3159 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3160 DEBUG(10, ("Unable to stat stream: %s\n",
3161 smb_fname_str_dbg(smb_fname)));
3162 }
3163
3164 status = SMB_VFS_CREATE_FILE(
3165 conn, /* conn */
3166 NULL, /* req */
3167 0, /* root_dir_fid */
3168 smb_fname, /* fname */
3169 DELETE_ACCESS, /* access_mask */
3170 (FILE_SHARE_READ | /* share_access */
3171 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3172 FILE_OPEN, /* create_disposition*/
3173 0, /* create_options */
3174 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3175 0, /* oplock_request */
3176 0, /* allocation_size */
3177 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3178 NULL, /* sd */
3179 NULL, /* ea_list */
3180 &streams[i], /* result */
3181 NULL); /* pinfo */
3182
3183 if (!NT_STATUS_IS_OK(status)) {
3184 DEBUG(10, ("Could not open stream %s: %s\n",
3185 smb_fname_str_dbg(smb_fname),
3186 nt_errstr(status)));
3187
3188 TALLOC_FREE(smb_fname);
3189 break;
3190 }
3191 TALLOC_FREE(smb_fname);
3192 }
3193
3194 /*
3195 * don't touch the variable "status" beyond this point :-)
3196 */
3197
3198 for (i -= 1 ; i >= 0; i--) {
3199 if (streams[i] == NULL) {
3200 continue;
3201 }
3202
3203 DEBUG(10, ("Closing stream # %d, %s\n", i,
3204 fsp_str_dbg(streams[i])));
3205 close_file(NULL, streams[i], NORMAL_CLOSE);
3206 }
3207
3208 fail:
3209 TALLOC_FREE(frame);
3210 return status;
3211 }
3212
3213 /*********************************************************************
3214 Create a default ACL by inheriting from the parent. If no inheritance
3215 from the parent available, don't set anything. This will leave the actual
3216 permissions the new file or directory already got from the filesystem
3217 as the NT ACL when read.
3218 *********************************************************************/
3219
3220 static NTSTATUS inherit_new_acl(files_struct *fsp)
3221 {
3222 TALLOC_CTX *ctx = talloc_tos();
3223 char *parent_name = NULL;
3224 struct security_descriptor *parent_desc = NULL;
3225 NTSTATUS status = NT_STATUS_OK;
3226 struct security_descriptor *psd = NULL;
3227 struct dom_sid *owner_sid = NULL;
3228 struct dom_sid *group_sid = NULL;
3229 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3230 bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3231 bool inheritable_components = false;
3232 size_t size = 0;
3233
3234 if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3235 return NT_STATUS_NO_MEMORY;
3236 }
3237
3238 status = SMB_VFS_GET_NT_ACL(fsp->conn,
3239 parent_name,
3240 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3241 &parent_desc);
3242 if (!NT_STATUS_IS_OK(status)) {
3243 return status;
3244 }
3245
3246 inheritable_components = sd_has_inheritable_components(parent_desc,
3247 fsp->is_directory);
3248
3249 if (!inheritable_components && !inherit_owner) {
3250 /* Nothing to inherit and not setting owner. */
3251 return NT_STATUS_OK;
3252 }
3253
3254 /* Create an inherited descriptor from the parent. */
3255
3256 if (DEBUGLEVEL >= 10) {
3257 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3258 fsp_str_dbg(fsp) ));
3259 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3260 }
3261
3262 /* Inherit from parent descriptor if "inherit owner" set. */
3263 if (inherit_owner) {
3264 owner_sid = parent_desc->owner_sid;
3265 group_sid = parent_desc->group_sid;
3266 }
3267
3268 if (owner_sid == NULL) {
3269 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3270 }
3271 if (group_sid == NULL) {
3272 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3273 }
3274
3275 status = se_create_child_secdesc(ctx,
3276 &psd,
3277 &size,
3278 parent_desc,
3279 owner_sid,
3280 group_sid,
3281 fsp->is_directory);
3282 if (!NT_STATUS_IS_OK(status)) {
3283 return status;
3284 }
3285
3286 /* If inheritable_components == false,
3287 se_create_child_secdesc()
3288 creates a security desriptor with a NULL dacl
3289 entry, but with SEC_DESC_DACL_PRESENT. We need
3290 to remove that flag. */
3291
3292 if (!inheritable_components) {
3293 security_info_sent &= ~SECINFO_DACL;
3294 psd->type &= ~SEC_DESC_DACL_PRESENT;
3295 }
3296
3297 if (DEBUGLEVEL >= 10) {
3298 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3299 fsp_str_dbg(fsp) ));
3300 NDR_PRINT_DEBUG(security_descriptor, psd);
3301 }
3302
3303 if (inherit_owner) {
3304 /* We need to be root to force this. */
3305 become_root();
3306 }
3307 status = SMB_VFS_FSET_NT_ACL(fsp,
3308 security_info_sent,
3309 psd);
3310 if (inherit_owner) {
3311 unbecome_root();
3312 }
3313 return status;
3314 }
3315
3316 /*
3317 * Wrapper around open_file_ntcreate and open_directory
3318 */
3319
3320 static NTSTATUS create_file_unixpath(connection_struct *conn,
3321 struct smb_request *req,
3322 struct smb_filename *smb_fname,
3323 uint32_t access_mask,
3324 uint32_t share_access,
3325 uint32_t create_disposition,
3326 uint32_t create_options,
3327 uint32_t file_attributes,
3328 uint32_t oplock_request,
3329 uint64_t allocation_size,
3330 uint32_t private_flags,
3331 struct security_descriptor *sd,
3332 struct ea_list *ea_list,
3333
3334 files_struct **result,
3335 int *pinfo)
3336 {
3337 int info = FILE_WAS_OPENED;
3338 files_struct *base_fsp = NULL;
3339 files_struct *fsp = NULL;
3340 NTSTATUS status;
3341
3342 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3343 "file_attributes = 0x%x, share_access = 0x%x, "
3344 "create_disposition = 0x%x create_options = 0x%x "
3345 "oplock_request = 0x%x private_flags = 0x%x "
3346 "ea_list = 0x%p, sd = 0x%p, "
3347 "fname = %s\n",
3348 (unsigned int)access_mask,
3349 (unsigned int)file_attributes,
3350 (unsigned int)share_access,
3351 (unsigned int)create_disposition,
3352 (unsigned int)create_options,
3353 (unsigned int)oplock_request,
3354 (unsigned int)private_flags,
3355 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3356
3357 if (create_options & FILE_OPEN_BY_FILE_ID) {
3358 status = NT_STATUS_NOT_SUPPORTED;
3359 goto fail;
3360 }
3361
3362 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3363 status = NT_STATUS_INVALID_PARAMETER;
3364 goto fail;
3365 }
3366
3367 if (req == NULL) {
3368 oplock_request |= INTERNAL_OPEN_ONLY;
3369 }
3370
3371 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3372 && (access_mask & DELETE_ACCESS)
3373 && !is_ntfs_stream_smb_fname(smb_fname)) {
3374 /*
3375 * We can't open a file with DELETE access if any of the
3376 * streams is open without FILE_SHARE_DELETE
3377 */
3378 status = open_streams_for_delete(conn, smb_fname->base_name);
3379
3380 if (!NT_STATUS_IS_OK(status)) {
3381 goto fail;
3382 }
3383 }
3384
3385 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3386 !security_token_has_privilege(get_current_nttok(conn),
3387 SEC_PRIV_SECURITY)) {
3388 DEBUG(10, ("create_file_unixpath: open on %s "
3389 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3390 smb_fname_str_dbg(smb_fname)));
3391 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3392 goto fail;
3393 }
3394
3395 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3396 && is_ntfs_stream_smb_fname(smb_fname)
3397 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3398 uint32 base_create_disposition;
3399 struct smb_filename *smb_fname_base = NULL;
3400
3401 if (create_options & FILE_DIRECTORY_FILE) {
3402 status = NT_STATUS_NOT_A_DIRECTORY;
3403 goto fail;
3404 }
3405
3406 switch (create_disposition) {
3407 case FILE_OPEN:
3408 base_create_disposition = FILE_OPEN;
3409 break;
3410 default:
3411 base_create_disposition = FILE_OPEN_IF;
3412 break;
3413 }
3414
3415 /* Create an smb_filename with stream_name == NULL. */
3416 status = create_synthetic_smb_fname(talloc_tos(),
3417 smb_fname->base_name,
3418 NULL, NULL,
3419 &smb_fname_base);
3420 if (!NT_STATUS_IS_OK(status)) {
3421 goto fail;
3422 }
3423
3424 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3425 DEBUG(10, ("Unable to stat stream: %s\n",
3426 smb_fname_str_dbg(smb_fname_base)));
3427 }
3428
3429 /* Open the base file. */
3430 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3431 FILE_SHARE_READ
3432 | FILE_SHARE_WRITE
3433 | FILE_SHARE_DELETE,
3434 base_create_disposition,
3435 0, 0, 0, 0, 0, NULL, NULL,
3436 &base_fsp, NULL);
3437 TALLOC_FREE(smb_fname_base);
3438
3439 if (!NT_STATUS_IS_OK(status)) {
3440 DEBUG(10, ("create_file_unixpath for base %s failed: "
3441 "%s\n", smb_fname->base_name,
3442 nt_errstr(status)));
3443 goto fail;
3444 }
3445 /* we don't need to low level fd */
3446 fd_close(base_fsp);
3447 }
3448
3449 /*
3450 * If it's a request for a directory open, deal with it separately.
3451 */
3452
3453 if (create_options & FILE_DIRECTORY_FILE) {
3454
3455 if (create_options & FILE_NON_DIRECTORY_FILE) {
3456 status = NT_STATUS_INVALID_PARAMETER;
3457 goto fail;
3458 }
3459
3460 /* Can't open a temp directory. IFS kit test. */
3461 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3462 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3463 status = NT_STATUS_INVALID_PARAMETER;
3464 goto fail;
3465 }
3466
3467 /*
3468 * We will get a create directory here if the Win32
3469 * app specified a security descriptor in the
3470 * CreateDirectory() call.
3471 */
3472
3473 oplock_request = 0;
3474 status = open_directory(
3475 conn, req, smb_fname, access_mask, share_access,
3476 create_disposition, create_options, file_attributes,
3477 &info, &fsp);
3478 } else {
3479
3480 /*
3481 * Ordinary file case.
3482 */
3483
3484 status = file_new(req, conn, &fsp);
3485 if(!NT_STATUS_IS_OK(status)) {
3486 goto fail;
3487 }
3488
3489 status = fsp_set_smb_fname(fsp, smb_fname);
3490 if (!NT_STATUS_IS_OK(status)) {
3491 goto fail;
3492 }
3493
3494 /*
3495 * We're opening the stream element of a base_fsp
3496 * we already opened. Set up the base_fsp pointer.
3497 */
3498 if (base_fsp) {
3499 fsp->base_fsp = base_fsp;
3500 }
3501
3502 status = open_file_ntcreate(conn,
3503 req,
3504 access_mask,
3505 share_access,
3506 create_disposition,
3507 create_options,
3508 file_attributes,
3509 oplock_request,
3510 private_flags,
3511 &info,
3512 fsp);
3513
3514 if(!NT_STATUS_IS_OK(status)) {
3515 file_free(req, fsp);
3516 fsp = NULL;
3517 }
3518
3519 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3520
3521 /* A stream open never opens a directory */
3522
3523 if (base_fsp) {
3524 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3525 goto fail;
3526 }
3527
3528 /*
3529 * Fail the open if it was explicitly a non-directory
3530 * file.
3531 */
3532
3533 if (create_options & FILE_NON_DIRECTORY_FILE) {
3534 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3535 goto fail;
3536 }
3537
3538 oplock_request = 0;
3539 status = open_directory(
3540 conn, req, smb_fname, access_mask,
3541 share_access, create_disposition,
3542 create_options, file_attributes,
3543 &info, &fsp);
3544 }
3545 }
3546
3547 if (!NT_STATUS_IS_OK(status)) {
3548 goto fail;
3549 }
3550
3551 fsp->base_fsp = base_fsp;
3552
3553 if ((ea_list != NULL) &&
3554 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3555 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3556 if (!NT_STATUS_IS_OK(status)) {
3557 goto fail;
3558 }
3559 }
3560
3561 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3562 status = NT_STATUS_ACCESS_DENIED;
3563 goto fail;
3564 }
3565
3566 /* Save the requested allocation size. */
3567 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3568 if (allocation_size
3569 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3570 fsp->initial_allocation_size = smb_roundup(
3571 fsp->conn, allocation_size);
3572 if (fsp->is_directory) {
3573 /* Can't set allocation size on a directory. */
3574 status = NT_STATUS_ACCESS_DENIED;
3575 goto fail;
3576 }
3577 if (vfs_allocate_file_space(
3578 fsp, fsp->initial_allocation_size) == -1) {
3579 status = NT_STATUS_DISK_FULL;
3580 goto fail;
3581 }
3582 } else {
3583 fsp->initial_allocation_size = smb_roundup(
3584 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3585 }
3586 }
3587
3588 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3589 fsp->base_fsp == NULL) {
3590 if (sd != NULL) {
3591 /*
3592 * According to the MS documentation, the only time the security
3593 * descriptor is applied to the opened file is iff we *created* the
3594 * file; an existing file stays the same.
3595 *
3596 * Also, it seems (from observation) that you can open the file with
3597 * any access mask but you can still write the sd. We need to override
3598 * the granted access before we call set_sd
3599 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3600 */
3601
3602 uint32_t sec_info_sent;
3603 uint32_t saved_access_mask = fsp->access_mask;
3604
3605 sec_info_sent = get_sec_info(sd);
3606
3607 fsp->access_mask = FILE_GENERIC_ALL;
3608
3609 /* Convert all the generic bits. */
3610 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3611 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3612
3613 if (sec_info_sent & (SECINFO_OWNER|
3614 SECINFO_GROUP|
3615 SECINFO_DACL|
3616 SECINFO_SACL)) {
3617 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3618 }
3619
3620 fsp->access_mask = saved_access_mask;
3621
3622 if (!NT_STATUS_IS_OK(status)) {
3623 goto fail;
3624 }
3625 } else if (lp_inherit_acls(SNUM(conn))) {
3626 /* Inherit from parent. Errors here are not fatal. */
3627 status = inherit_new_acl(fsp);
3628 if (!NT_STATUS_IS_OK(status)) {
3629 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3630 fsp_str_dbg(fsp),
3631 nt_errstr(status) ));
3632 }
3633 }
3634 }
3635
3636 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3637
3638 *result = fsp;
3639 if (pinfo != NULL) {
3640 *pinfo = info;
3641 }
3642
3643 smb_fname->st = fsp->fsp_name->st;
3644
3645 return NT_STATUS_OK;
3646
3647 fail:
3648 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3649
3650 if (fsp != NULL) {
3651 if (base_fsp && fsp->base_fsp == base_fsp) {
3652 /*
3653 * The close_file below will close
3654 * fsp->base_fsp.
3655 */
3656 base_fsp = NULL;
3657 }
3658 close_file(req, fsp, ERROR_CLOSE);
3659 fsp = NULL;
3660 }
3661 if (base_fsp != NULL) {
3662 close_file(req, base_fsp, ERROR_CLOSE);
3663 base_fsp = NULL;
3664 }
3665 return status;
3666 }
3667
3668 /*
3669 * Calculate the full path name given a relative fid.
3670 */
3671 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3672 struct smb_request *req,
3673 uint16_t root_dir_fid,
3674 const struct smb_filename *smb_fname,
3675 struct smb_filename **smb_fname_out)
3676 {
3677 files_struct *dir_fsp;
3678 char *parent_fname = NULL;
3679 char *new_base_name = NULL;
3680 NTSTATUS status;
3681
3682 if (root_dir_fid == 0 || !smb_fname) {
3683 status = NT_STATUS_INTERNAL_ERROR;
3684 goto out;
3685 }
3686
3687 dir_fsp = file_fsp(req, root_dir_fid);
3688
3689 if (dir_fsp == NULL) {
3690 status = NT_STATUS_INVALID_HANDLE;
3691 goto out;
3692 }
3693
3694 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3695 status = NT_STATUS_INVALID_HANDLE;
3696 goto out;
3697 }
3698
3699 if (!dir_fsp->is_directory) {
3700
3701 /*
3702 * Check to see if this is a mac fork of some kind.
3703 */
3704
3705 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3706 is_ntfs_stream_smb_fname(smb_fname)) {
3707 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3708 goto out;
3709 }
3710
3711 /*
3712 we need to handle the case when we get a
3713 relative open relative to a file and the
3714 pathname is blank - this is a reopen!
3715 (hint from demyn plantenberg)
3716 */
3717
3718 status = NT_STATUS_INVALID_HANDLE;
3719 goto out;
3720 }
3721
3722 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3723 /*
3724 * We're at the toplevel dir, the final file name
3725 * must not contain ./, as this is filtered out
3726 * normally by srvstr_get_path and unix_convert
3727 * explicitly rejects paths containing ./.
3728 */
3729 parent_fname = talloc_strdup(talloc_tos(), "");
3730 if (parent_fname == NULL) {
3731 status = NT_STATUS_NO_MEMORY;
3732 goto out;
3733 }
3734 } else {
3735 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3736
3737 /*
3738 * Copy in the base directory name.
3739 */
3740
3741 parent_fname = talloc_array(talloc_tos(), char,
3742 dir_name_len+2);
3743 if (parent_fname == NULL) {
3744 status = NT_STATUS_NO_MEMORY;
3745 goto out;
3746 }
3747 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3748 dir_name_len+1);
3749
3750 /*
3751 * Ensure it ends in a '/'.
3752 * We used TALLOC_SIZE +2 to add space for the '/'.
3753 */
3754
3755 if(dir_name_len
3756 && (parent_fname[dir_name_len-1] != '\\')
3757 && (parent_fname[dir_name_len-1] != '/')) {
3758 parent_fname[dir_name_len] = '/';
3759 parent_fname[dir_name_len+1] = '\0';
3760 }
3761 }
3762
3763 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3764 smb_fname->base_name);
3765 if (new_base_name == NULL) {
3766 status = NT_STATUS_NO_MEMORY;
3767 goto out;
3768 }
3769
3770 status = filename_convert(req,
3771 conn,
3772 req->flags2 & FLAGS2_DFS_PATHNAMES,
3773 new_base_name,
3774 0,
3775 NULL,
3776 smb_fname_out);
3777 if (!NT_STATUS_IS_OK(status)) {
3778 goto out;
3779 }
3780
3781 out:
3782 TALLOC_FREE(parent_fname);
3783 TALLOC_FREE(new_base_name);
3784 return status;
3785 }
3786
3787 NTSTATUS create_file_default(connection_struct *conn,
3788 struct smb_request *req,
3789 uint16_t root_dir_fid,
3790 struct smb_filename *smb_fname,
3791 uint32_t access_mask,
3792 uint32_t share_access,
3793 uint32_t create_disposition,
3794 uint32_t create_options,
3795 uint32_t file_attributes,
3796 uint32_t oplock_request,
3797 uint64_t allocation_size,
3798 uint32_t private_flags,
3799 struct security_descriptor *sd,
3800 struct ea_list *ea_list,
3801 files_struct **result,
3802 int *pinfo)
3803 {
3804 int info = FILE_WAS_OPENED;
3805 files_struct *fsp = NULL;
3806 NTSTATUS status;
3807 bool stream_name = false;
3808
3809 DEBUG(10,("create_file: access_mask = 0x%x "
3810 "file_attributes = 0x%x, share_access = 0x%x, "
3811 "create_disposition = 0x%x create_options = 0x%x "
3812 "oplock_request = 0x%x "
3813 "private_flags = 0x%x "
3814 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3815 "fname = %s\n",
3816 (unsigned int)access_mask,
3817 (unsigned int)file_attributes,
3818 (unsigned int)share_access,
3819 (unsigned int)create_disposition,
3820 (unsigned int)create_options,
3821 (unsigned int)oplock_request,
3822 (unsigned int)private_flags,
3823 (unsigned int)root_dir_fid,
3824 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3825
3826 /*
3827 * Calculate the filename from the root_dir_if if necessary.
3828 */
3829
3830 if (root_dir_fid != 0) {
3831 struct smb_filename *smb_fname_out = NULL;
3832 status = get_relative_fid_filename(conn, req, root_dir_fid,
3833 smb_fname, &smb_fname_out);
3834 if (!NT_STATUS_IS_OK(status)) {
3835 goto fail;
3836 }
3837 smb_fname = smb_fname_out;
3838 }
3839
3840 /*
3841 * Check to see if this is a mac fork of some kind.
3842 */
3843
3844 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3845 if (stream_name) {
3846 enum FAKE_FILE_TYPE fake_file_type;
3847
3848 fake_file_type = is_fake_file(smb_fname);
3849
3850 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3851
3852 /*
3853 * Here we go! support for changing the disk quotas
3854 * --metze
3855 *
3856 * We need to fake up to open this MAGIC QUOTA file
3857 * and return a valid FID.
3858 *
3859 * w2k close this file directly after openening xp
3860 * also tries a QUERY_FILE_INFO on the file and then
3861 * close it
3862 */
3863 status = open_fake_file(req, conn, req->vuid,
3864 fake_file_type, smb_fname,
3865 access_mask, &fsp);
3866 if (!NT_STATUS_IS_OK(status)) {
3867 goto fail;
3868 }
3869
3870 ZERO_STRUCT(smb_fname->st);
3871 goto done;
3872 }
3873
3874 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3875 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3876 goto fail;
3877 }
3878 }
3879
3880 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3881 int ret;
3882 smb_fname->stream_name = NULL;
3883 /* We have to handle this error here. */
3884 if (create_options & FILE_DIRECTORY_FILE) {
3885 status = NT_STATUS_NOT_A_DIRECTORY;
3886 goto fail;
3887 }
3888 if (lp_posix_pathnames()) {
3889 ret = SMB_VFS_LSTAT(conn, smb_fname);
3890 } else {
3891 ret = SMB_VFS_STAT(conn, smb_fname);
3892 }
3893
3894 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3895 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3896 goto fail;
3897 }
3898 }
3899
3900 status = create_file_unixpath(
3901 conn, req, smb_fname, access_mask, share_access,
3902 create_disposition, create_options, file_attributes,
3903 oplock_request, allocation_size, private_flags,
3904 sd, ea_list,
3905 &fsp, &info);
3906
3907 if (!NT_STATUS_IS_OK(status)) {
3908 goto fail;
3909 }
3910
3911 done:
3912 DEBUG(10, ("create_file: info=%d\n", info));
3913
3914 *result = fsp;
3915 if (pinfo != NULL) {
3916 *pinfo = info;
3917 }
3918 return NT_STATUS_OK;
3919
3920 fail:
3921 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3922
3923 if (fsp != NULL) {
3924 close_file(req, fsp, ERROR_CLOSE);
3925 fsp = NULL;
3926 }
3927 return status;
3928 }
Working branch of Samba for id10ts