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s3: Slightly simplify the logic in defer_open
[Samba/id10ts.git] / source3 / smbd / open.c
blob433bc090228f6b829401391f3b7c55c8a49aba9c
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 = 0;
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 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
103 (SECINFO_OWNER |
104 SECINFO_GROUP |
105 SECINFO_DACL),&sd);
106
107 if (!NT_STATUS_IS_OK(status)) {
108 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
109 "on %s: %s\n",
110 smb_fname_str_dbg(smb_fname),
111 nt_errstr(status)));
112 return status;
113 }
114
115 /*
116 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
117 * owner WRITE_DAC and READ_CONTROL.
118 */
119 status = se_access_check(sd,
120 get_current_nttok(conn),
121 (access_mask & ~FILE_READ_ATTRIBUTES),
122 &rejected_mask);
123
124 DEBUG(10,("smbd_check_access_rights: file %s requesting "
125 "0x%x returning 0x%x (%s)\n",
126 smb_fname_str_dbg(smb_fname),
127 (unsigned int)access_mask,
128 (unsigned int)rejected_mask,
129 nt_errstr(status) ));
130
131 if (!NT_STATUS_IS_OK(status)) {
132 if (DEBUGLEVEL >= 10) {
133 DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
134 smb_fname_str_dbg(smb_fname) ));
135 NDR_PRINT_DEBUG(security_descriptor, sd);
136 }
137 }
138
139 TALLOC_FREE(sd);
140
141 if (NT_STATUS_IS_OK(status) ||
142 !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
143 return status;
144 }
145
146 /* Here we know status == NT_STATUS_ACCESS_DENIED. */
147 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
148 (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
149 (lp_map_readonly(SNUM(conn)) ||
150 lp_map_archive(SNUM(conn)) ||
151 lp_map_hidden(SNUM(conn)) ||
152 lp_map_system(SNUM(conn)))) {
153 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
154
155 DEBUG(10,("smbd_check_access_rights: "
156 "overrode "
157 "FILE_WRITE_ATTRIBUTES "
158 "on file %s\n",
159 smb_fname_str_dbg(smb_fname)));
160 }
161
162 if (parent_override_delete(conn,
163 smb_fname,
164 access_mask,
165 rejected_mask)) {
166 /* Were we trying to do an open
167 * for delete and didn't get DELETE
168 * access (only) ? Check if the
169 * directory allows DELETE_CHILD.
170 * See here:
171 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
172 * for details. */
173
174 rejected_mask &= ~DELETE_ACCESS;
175
176 DEBUG(10,("smbd_check_access_rights: "
177 "overrode "
178 "DELETE_ACCESS on "
179 "file %s\n",
180 smb_fname_str_dbg(smb_fname)));
181 }
182
183 if (rejected_mask != 0) {
184 return NT_STATUS_ACCESS_DENIED;
185 } else {
186 return NT_STATUS_OK;
187 }
188 }
189
190 static NTSTATUS check_parent_access(struct connection_struct *conn,
191 struct smb_filename *smb_fname,
192 uint32_t access_mask,
193 char **pp_parent_dir)
194 {
195 NTSTATUS status;
196 char *parent_dir = NULL;
197 struct security_descriptor *parent_sd = NULL;
198 uint32_t access_granted = 0;
199
200 if (!parent_dirname(talloc_tos(),
201 smb_fname->base_name,
202 &parent_dir,
203 NULL)) {
204 return NT_STATUS_NO_MEMORY;
205 }
206
207 if (pp_parent_dir) {
208 *pp_parent_dir = parent_dir;
209 }
210
211 if (get_current_uid(conn) == (uid_t)0) {
212 /* I'm sorry sir, I didn't know you were root... */
213 DEBUG(10,("check_parent_access: root override "
214 "on %s. Granting 0x%x\n",
215 smb_fname_str_dbg(smb_fname),
216 (unsigned int)access_mask ));
217 return NT_STATUS_OK;
218 }
219
220 status = SMB_VFS_GET_NT_ACL(conn,
221 parent_dir,
222 SECINFO_DACL,
223 &parent_sd);
224
225 if (!NT_STATUS_IS_OK(status)) {
226 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
227 "%s with error %s\n",
228 parent_dir,
229 nt_errstr(status)));
230 return status;
231 }
232
233 /*
234 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
235 * owner WRITE_DAC and READ_CONTROL.
236 */
237 status = se_access_check(parent_sd,
238 get_current_nttok(conn),
239 (access_mask & ~FILE_READ_ATTRIBUTES),
240 &access_granted);
241 if(!NT_STATUS_IS_OK(status)) {
242 DEBUG(5,("check_parent_access: access check "
243 "on directory %s for "
244 "path %s for mask 0x%x returned (0x%x) %s\n",
245 parent_dir,
246 smb_fname->base_name,
247 access_mask,
248 access_granted,
249 nt_errstr(status) ));
250 return status;
251 }
252
253 return NT_STATUS_OK;
254 }
255
256 /****************************************************************************
257 fd support routines - attempt to do a dos_open.
258 ****************************************************************************/
259
260 static NTSTATUS fd_open(struct connection_struct *conn,
261 files_struct *fsp,
262 int flags,
263 mode_t mode)
264 {
265 struct smb_filename *smb_fname = fsp->fsp_name;
266 NTSTATUS status = NT_STATUS_OK;
267
268 #ifdef O_NOFOLLOW
269 /*
270 * Never follow symlinks on a POSIX client. The
271 * client should be doing this.
272 */
273
274 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
275 flags |= O_NOFOLLOW;
276 }
277 #endif
278
279 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
280 if (fsp->fh->fd == -1) {
281 status = map_nt_error_from_unix(errno);
282 if (errno == EMFILE) {
283 static time_t last_warned = 0L;
284
285 if (time((time_t *) NULL) > last_warned) {
286 DEBUG(0,("Too many open files, unable "
287 "to open more! smbd's max "
288 "open files = %d\n",
289 lp_max_open_files()));
290 last_warned = time((time_t *) NULL);
291 }
292 }
293
294 }
295
296 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
297 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
298 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
299
300 return status;
301 }
302
303 /****************************************************************************
304 Close the file associated with a fsp.
305 ****************************************************************************/
306
307 NTSTATUS fd_close(files_struct *fsp)
308 {
309 int ret;
310
311 if (fsp->dptr) {
312 dptr_CloseDir(fsp);
313 }
314 if (fsp->fh->fd == -1) {
315 return NT_STATUS_OK; /* What we used to call a stat open. */
316 }
317 if (fsp->fh->ref_count > 1) {
318 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
319 }
320
321 ret = SMB_VFS_CLOSE(fsp);
322 fsp->fh->fd = -1;
323 if (ret == -1) {
324 return map_nt_error_from_unix(errno);
325 }
326 return NT_STATUS_OK;
327 }
328
329 /****************************************************************************
330 Change the ownership of a file to that of the parent directory.
331 Do this by fd if possible.
332 ****************************************************************************/
333
334 void change_file_owner_to_parent(connection_struct *conn,
335 const char *inherit_from_dir,
336 files_struct *fsp)
337 {
338 struct smb_filename *smb_fname_parent = NULL;
339 NTSTATUS status;
340 int ret;
341
342 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
343 NULL, NULL, &smb_fname_parent);
344 if (!NT_STATUS_IS_OK(status)) {
345 return;
346 }
347
348 ret = SMB_VFS_STAT(conn, smb_fname_parent);
349 if (ret == -1) {
350 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
351 "directory %s. Error was %s\n",
352 smb_fname_str_dbg(smb_fname_parent),
353 strerror(errno)));
354 TALLOC_FREE(smb_fname_parent);
355 return;
356 }
357
358 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
359 /* Already this uid - no need to change. */
360 DEBUG(10,("change_file_owner_to_parent: file %s "
361 "is already owned by uid %d\n",
362 fsp_str_dbg(fsp),
363 (int)fsp->fsp_name->st.st_ex_uid ));
364 TALLOC_FREE(smb_fname_parent);
365 return;
366 }
367
368 become_root();
369 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
370 unbecome_root();
371 if (ret == -1) {
372 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
373 "file %s to parent directory uid %u. Error "
374 "was %s\n", fsp_str_dbg(fsp),
375 (unsigned int)smb_fname_parent->st.st_ex_uid,
376 strerror(errno) ));
377 } else {
378 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
379 "parent directory uid %u.\n", fsp_str_dbg(fsp),
380 (unsigned int)smb_fname_parent->st.st_ex_uid));
381 /* Ensure the uid entry is updated. */
382 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
383 }
384
385 TALLOC_FREE(smb_fname_parent);
386 }
387
388 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
389 const char *inherit_from_dir,
390 const char *fname,
391 SMB_STRUCT_STAT *psbuf)
392 {
393 struct smb_filename *smb_fname_parent = NULL;
394 struct smb_filename *smb_fname_cwd = NULL;
395 char *saved_dir = NULL;
396 TALLOC_CTX *ctx = talloc_tos();
397 NTSTATUS status = NT_STATUS_OK;
398 int ret;
399
400 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
401 &smb_fname_parent);
402 if (!NT_STATUS_IS_OK(status)) {
403 return status;
404 }
405
406 ret = SMB_VFS_STAT(conn, smb_fname_parent);
407 if (ret == -1) {
408 status = map_nt_error_from_unix(errno);
409 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
410 "directory %s. Error was %s\n",
411 smb_fname_str_dbg(smb_fname_parent),
412 strerror(errno)));
413 goto out;
414 }
415
416 /* We've already done an lstat into psbuf, and we know it's a
417 directory. If we can cd into the directory and the dev/ino
418 are the same then we can safely chown without races as
419 we're locking the directory in place by being in it. This
420 should work on any UNIX (thanks tridge :-). JRA.
421 */
422
423 saved_dir = vfs_GetWd(ctx,conn);
424 if (!saved_dir) {
425 status = map_nt_error_from_unix(errno);
426 DEBUG(0,("change_dir_owner_to_parent: failed to get "
427 "current working directory. Error was %s\n",
428 strerror(errno)));
429 goto out;
430 }
431
432 /* Chdir into the new path. */
433 if (vfs_ChDir(conn, fname) == -1) {
434 status = map_nt_error_from_unix(errno);
435 DEBUG(0,("change_dir_owner_to_parent: failed to change "
436 "current working directory to %s. Error "
437 "was %s\n", fname, strerror(errno) ));
438 goto chdir;
439 }
440
441 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
442 &smb_fname_cwd);
443 if (!NT_STATUS_IS_OK(status)) {
444 return status;
445 }
446
447 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
448 if (ret == -1) {
449 status = map_nt_error_from_unix(errno);
450 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
451 "directory '.' (%s) Error was %s\n",
452 fname, strerror(errno)));
453 goto chdir;
454 }
455
456 /* Ensure we're pointing at the same place. */
457 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
458 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
459 DEBUG(0,("change_dir_owner_to_parent: "
460 "device/inode on directory %s changed. "
461 "Refusing to chown !\n", fname ));
462 status = NT_STATUS_ACCESS_DENIED;
463 goto chdir;
464 }
465
466 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
467 /* Already this uid - no need to change. */
468 DEBUG(10,("change_dir_owner_to_parent: directory %s "
469 "is already owned by uid %d\n",
470 fname,
471 (int)smb_fname_cwd->st.st_ex_uid ));
472 status = NT_STATUS_OK;
473 goto chdir;
474 }
475
476 become_root();
477 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
478 (gid_t)-1);
479 unbecome_root();
480 if (ret == -1) {
481 status = map_nt_error_from_unix(errno);
482 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
483 "directory %s to parent directory uid %u. "
484 "Error was %s\n", fname,
485 (unsigned int)smb_fname_parent->st.st_ex_uid,
486 strerror(errno) ));
487 } else {
488 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
489 "directory %s to parent directory uid %u.\n",
490 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
491 /* Ensure the uid entry is updated. */
492 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
493 }
494
495 chdir:
496 vfs_ChDir(conn,saved_dir);
497 out:
498 TALLOC_FREE(smb_fname_parent);
499 TALLOC_FREE(smb_fname_cwd);
500 return status;
501 }
502
503 /****************************************************************************
504 Open a file.
505 ****************************************************************************/
506
507 static NTSTATUS open_file(files_struct *fsp,
508 connection_struct *conn,
509 struct smb_request *req,
510 const char *parent_dir,
511 int flags,
512 mode_t unx_mode,
513 uint32 access_mask, /* client requested access mask. */
514 uint32 open_access_mask) /* what we're actually using in the open. */
515 {
516 struct smb_filename *smb_fname = fsp->fsp_name;
517 NTSTATUS status = NT_STATUS_OK;
518 int accmode = (flags & O_ACCMODE);
519 int local_flags = flags;
520 bool file_existed = VALID_STAT(fsp->fsp_name->st);
521 bool file_created = false;
522
523 fsp->fh->fd = -1;
524 errno = EPERM;
525
526 /* Check permissions */
527
528 /*
529 * This code was changed after seeing a client open request
530 * containing the open mode of (DENY_WRITE/read-only) with
531 * the 'create if not exist' bit set. The previous code
532 * would fail to open the file read only on a read-only share
533 * as it was checking the flags parameter directly against O_RDONLY,
534 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
535 * JRA.
536 */
537
538 if (!CAN_WRITE(conn)) {
539 /* It's a read-only share - fail if we wanted to write. */
540 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
541 DEBUG(3,("Permission denied opening %s\n",
542 smb_fname_str_dbg(smb_fname)));
543 return NT_STATUS_ACCESS_DENIED;
544 } else if(flags & O_CREAT) {
545 /* We don't want to write - but we must make sure that
546 O_CREAT doesn't create the file if we have write
547 access into the directory.
548 */
549 flags &= ~(O_CREAT|O_EXCL);
550 local_flags &= ~(O_CREAT|O_EXCL);
551 }
552 }
553
554 /*
555 * This little piece of insanity is inspired by the
556 * fact that an NT client can open a file for O_RDONLY,
557 * but set the create disposition to FILE_EXISTS_TRUNCATE.
558 * If the client *can* write to the file, then it expects to
559 * truncate the file, even though it is opening for readonly.
560 * Quicken uses this stupid trick in backup file creation...
561 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
562 * for helping track this one down. It didn't bite us in 2.0.x
563 * as we always opened files read-write in that release. JRA.
564 */
565
566 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
567 DEBUG(10,("open_file: truncate requested on read-only open "
568 "for file %s\n", smb_fname_str_dbg(smb_fname)));
569 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
570 }
571
572 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
573 (!file_existed && (local_flags & O_CREAT)) ||
574 ((local_flags & O_TRUNC) == O_TRUNC) ) {
575 const char *wild;
576
577 /*
578 * We can't actually truncate here as the file may be locked.
579 * open_file_ntcreate will take care of the truncate later. JRA.
580 */
581
582 local_flags &= ~O_TRUNC;
583
584 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
585 /*
586 * We would block on opening a FIFO with no one else on the
587 * other end. Do what we used to do and add O_NONBLOCK to the
588 * open flags. JRA.
589 */
590
591 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
592 local_flags |= O_NONBLOCK;
593 }
594 #endif
595
596 /* Don't create files with Microsoft wildcard characters. */
597 if (fsp->base_fsp) {
598 /*
599 * wildcard characters are allowed in stream names
600 * only test the basefilename
601 */
602 wild = fsp->base_fsp->fsp_name->base_name;
603 } else {
604 wild = smb_fname->base_name;
605 }
606 if ((local_flags & O_CREAT) && !file_existed &&
607 ms_has_wild(wild)) {
608 return NT_STATUS_OBJECT_NAME_INVALID;
609 }
610
611 /* Can we access this file ? */
612 if (!fsp->base_fsp) {
613 /* Only do this check on non-stream open. */
614 if (file_existed) {
615 status = smbd_check_access_rights(conn,
616 smb_fname,
617 access_mask);
618 } else if (local_flags & O_CREAT){
619 status = check_parent_access(conn,
620 smb_fname,
621 SEC_DIR_ADD_FILE,
622 NULL);
623 } else {
624 /* File didn't exist and no O_CREAT. */
625 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
626 }
627 if (!NT_STATUS_IS_OK(status)) {
628 DEBUG(10,("open_file: "
629 "%s on file "
630 "%s returned %s\n",
631 file_existed ?
632 "smbd_check_access_rights" :
633 "check_parent_access",
634 smb_fname_str_dbg(smb_fname),
635 nt_errstr(status) ));
636 return status;
637 }
638 }
639
640 /* Actually do the open */
641 status = fd_open(conn, fsp, local_flags, unx_mode);
642 if (!NT_STATUS_IS_OK(status)) {
643 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
644 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
645 nt_errstr(status),local_flags,flags));
646 return status;
647 }
648
649 if ((local_flags & O_CREAT) && !file_existed) {
650 file_created = true;
651 }
652
653 } else {
654 fsp->fh->fd = -1; /* What we used to call a stat open. */
655 if (!file_existed) {
656 /* File must exist for a stat open. */
657 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
658 }
659
660 status = smbd_check_access_rights(conn,
661 smb_fname,
662 access_mask);
663
664 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
665 fsp->posix_open &&
666 S_ISLNK(smb_fname->st.st_ex_mode)) {
667 /* This is a POSIX stat open for delete
668 * or rename on a symlink that points
669 * nowhere. Allow. */
670 DEBUG(10,("open_file: allowing POSIX "
671 "open on bad symlink %s\n",
672 smb_fname_str_dbg(smb_fname)));
673 status = NT_STATUS_OK;
674 }
675
676 if (!NT_STATUS_IS_OK(status)) {
677 DEBUG(10,("open_file: "
678 "smbd_check_access_rights on file "
679 "%s returned %s\n",
680 smb_fname_str_dbg(smb_fname),
681 nt_errstr(status) ));
682 return status;
683 }
684 }
685
686 if (!file_existed) {
687 int ret;
688
689 if (fsp->fh->fd == -1) {
690 ret = SMB_VFS_STAT(conn, smb_fname);
691 } else {
692 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
693 /* If we have an fd, this stat should succeed. */
694 if (ret == -1) {
695 DEBUG(0,("Error doing fstat on open file %s "
696 "(%s)\n",
697 smb_fname_str_dbg(smb_fname),
698 strerror(errno) ));
699 }
700 }
701
702 /* For a non-io open, this stat failing means file not found. JRA */
703 if (ret == -1) {
704 status = map_nt_error_from_unix(errno);
705 fd_close(fsp);
706 return status;
707 }
708
709 if (file_created) {
710 bool need_re_stat = false;
711 /* Do all inheritance work after we've
712 done a successful stat call and filled
713 in the stat struct in fsp->fsp_name. */
714
715 /* Inherit the ACL if required */
716 if (lp_inherit_perms(SNUM(conn))) {
717 inherit_access_posix_acl(conn, parent_dir,
718 smb_fname->base_name,
719 unx_mode);
720 need_re_stat = true;
721 }
722
723 /* Change the owner if required. */
724 if (lp_inherit_owner(SNUM(conn))) {
725 change_file_owner_to_parent(conn, parent_dir,
726 fsp);
727 need_re_stat = true;
728 }
729
730 if (need_re_stat) {
731 if (fsp->fh->fd == -1) {
732 ret = SMB_VFS_STAT(conn, smb_fname);
733 } else {
734 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
735 /* If we have an fd, this stat should succeed. */
736 if (ret == -1) {
737 DEBUG(0,("Error doing fstat on open file %s "
738 "(%s)\n",
739 smb_fname_str_dbg(smb_fname),
740 strerror(errno) ));
741 }
742 }
743 }
744
745 notify_fname(conn, NOTIFY_ACTION_ADDED,
746 FILE_NOTIFY_CHANGE_FILE_NAME,
747 smb_fname->base_name);
748 }
749 }
750
751 /*
752 * POSIX allows read-only opens of directories. We don't
753 * want to do this (we use a different code path for this)
754 * so catch a directory open and return an EISDIR. JRA.
755 */
756
757 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
758 fd_close(fsp);
759 errno = EISDIR;
760 return NT_STATUS_FILE_IS_A_DIRECTORY;
761 }
762
763 fsp->mode = smb_fname->st.st_ex_mode;
764 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
765 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
766 fsp->file_pid = req ? req->smbpid : 0;
767 fsp->can_lock = True;
768 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
769 if (!CAN_WRITE(conn)) {
770 fsp->can_write = False;
771 } else {
772 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
773 True : False;
774 }
775 fsp->print_file = NULL;
776 fsp->modified = False;
777 fsp->sent_oplock_break = NO_BREAK_SENT;
778 fsp->is_directory = False;
779 if (conn->aio_write_behind_list &&
780 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
781 conn->case_sensitive)) {
782 fsp->aio_write_behind = True;
783 }
784
785 fsp->wcp = NULL; /* Write cache pointer. */
786
787 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
788 conn->session_info->unix_info->unix_name,
789 smb_fname_str_dbg(smb_fname),
790 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
791 conn->num_files_open));
792
793 errno = 0;
794 return NT_STATUS_OK;
795 }
796
797 /****************************************************************************
798 Check if we can open a file with a share mode.
799 Returns True if conflict, False if not.
800 ****************************************************************************/
801
802 static bool share_conflict(struct share_mode_entry *entry,
803 uint32 access_mask,
804 uint32 share_access)
805 {
806 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
807 "entry->share_access = 0x%x, "
808 "entry->private_options = 0x%x\n",
809 (unsigned int)entry->access_mask,
810 (unsigned int)entry->share_access,
811 (unsigned int)entry->private_options));
812
813 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
814 (unsigned int)access_mask, (unsigned int)share_access));
815
816 if ((entry->access_mask & (FILE_WRITE_DATA|
817 FILE_APPEND_DATA|
818 FILE_READ_DATA|
819 FILE_EXECUTE|
820 DELETE_ACCESS)) == 0) {
821 DEBUG(10,("share_conflict: No conflict due to "
822 "entry->access_mask = 0x%x\n",
823 (unsigned int)entry->access_mask ));
824 return False;
825 }
826
827 if ((access_mask & (FILE_WRITE_DATA|
828 FILE_APPEND_DATA|
829 FILE_READ_DATA|
830 FILE_EXECUTE|
831 DELETE_ACCESS)) == 0) {
832 DEBUG(10,("share_conflict: No conflict due to "
833 "access_mask = 0x%x\n",
834 (unsigned int)access_mask ));
835 return False;
836 }
837
838 #if 1 /* JRA TEST - Superdebug. */
839 #define CHECK_MASK(num, am, right, sa, share) \
840 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
841 (unsigned int)(num), (unsigned int)(am), \
842 (unsigned int)(right), (unsigned int)(am)&(right) )); \
843 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
844 (unsigned int)(num), (unsigned int)(sa), \
845 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
846 if (((am) & (right)) && !((sa) & (share))) { \
847 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
848 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
849 (unsigned int)(share) )); \
850 return True; \
851 }
852 #else
853 #define CHECK_MASK(num, am, right, sa, share) \
854 if (((am) & (right)) && !((sa) & (share))) { \
855 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
856 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
857 (unsigned int)(share) )); \
858 return True; \
859 }
860 #endif
861
862 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
863 share_access, FILE_SHARE_WRITE);
864 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
865 entry->share_access, FILE_SHARE_WRITE);
866
867 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
868 share_access, FILE_SHARE_READ);
869 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
870 entry->share_access, FILE_SHARE_READ);
871
872 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
873 share_access, FILE_SHARE_DELETE);
874 CHECK_MASK(6, access_mask, DELETE_ACCESS,
875 entry->share_access, FILE_SHARE_DELETE);
876
877 DEBUG(10,("share_conflict: No conflict.\n"));
878 return False;
879 }
880
881 #if defined(DEVELOPER)
882 static void validate_my_share_entries(struct smbd_server_connection *sconn,
883 int num,
884 struct share_mode_entry *share_entry)
885 {
886 files_struct *fsp;
887
888 if (!procid_is_me(&share_entry->pid)) {
889 return;
890 }
891
892 if (is_deferred_open_entry(share_entry) &&
893 !open_was_deferred(sconn, share_entry->op_mid)) {
894 char *str = talloc_asprintf(talloc_tos(),
895 "Got a deferred entry without a request: "
896 "PANIC: %s\n",
897 share_mode_str(talloc_tos(), num, share_entry));
898 smb_panic(str);
899 }
900
901 if (!is_valid_share_mode_entry(share_entry)) {
902 return;
903 }
904
905 fsp = file_find_dif(sconn, share_entry->id,
906 share_entry->share_file_id);
907 if (!fsp) {
908 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
909 share_mode_str(talloc_tos(), num, share_entry) ));
910 smb_panic("validate_my_share_entries: Cannot match a "
911 "share entry with an open file\n");
912 }
913
914 if (is_deferred_open_entry(share_entry)) {
915 goto panic;
916 }
917
918 if ((share_entry->op_type == NO_OPLOCK) &&
919 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
920 /* Someone has already written to it, but I haven't yet
921 * noticed */
922 return;
923 }
924
925 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
926 goto panic;
927 }
928
929 return;
930
931 panic:
932 {
933 char *str;
934 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
935 share_mode_str(talloc_tos(), num, share_entry) ));
936 str = talloc_asprintf(talloc_tos(),
937 "validate_my_share_entries: "
938 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
939 fsp->fsp_name->base_name,
940 (unsigned int)fsp->oplock_type,
941 (unsigned int)share_entry->op_type );
942 smb_panic(str);
943 }
944 }
945 #endif
946
947 bool is_stat_open(uint32 access_mask)
948 {
949 return (access_mask &&
950 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
951 FILE_WRITE_ATTRIBUTES))==0) &&
952 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
953 FILE_WRITE_ATTRIBUTES)) != 0));
954 }
955
956 /****************************************************************************
957 Deal with share modes
958 Invarient: Share mode must be locked on entry and exit.
959 Returns -1 on error, or number of share modes on success (may be zero).
960 ****************************************************************************/
961
962 static NTSTATUS open_mode_check(connection_struct *conn,
963 struct share_mode_lock *lck,
964 uint32_t name_hash,
965 uint32 access_mask,
966 uint32 share_access,
967 uint32 create_options,
968 bool *file_existed)
969 {
970 int i;
971
972 if(lck->num_share_modes == 0) {
973 return NT_STATUS_OK;
974 }
975
976 *file_existed = True;
977
978 /* A delete on close prohibits everything */
979
980 if (is_delete_on_close_set(lck, name_hash)) {
981 return NT_STATUS_DELETE_PENDING;
982 }
983
984 if (is_stat_open(access_mask)) {
985 /* Stat open that doesn't trigger oplock breaks or share mode
986 * checks... ! JRA. */
987 return NT_STATUS_OK;
988 }
989
990 /*
991 * Check if the share modes will give us access.
992 */
993
994 #if defined(DEVELOPER)
995 for(i = 0; i < lck->num_share_modes; i++) {
996 validate_my_share_entries(conn->sconn, i,
997 &lck->share_modes[i]);
998 }
999 #endif
1000
1001 if (!lp_share_modes(SNUM(conn))) {
1002 return NT_STATUS_OK;
1003 }
1004
1005 /* Now we check the share modes, after any oplock breaks. */
1006 for(i = 0; i < lck->num_share_modes; i++) {
1007
1008 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1009 continue;
1010 }
1011
1012 /* someone else has a share lock on it, check to see if we can
1013 * too */
1014 if (share_conflict(&lck->share_modes[i],
1015 access_mask, share_access)) {
1016 return NT_STATUS_SHARING_VIOLATION;
1017 }
1018 }
1019
1020 return NT_STATUS_OK;
1021 }
1022
1023 static bool is_delete_request(files_struct *fsp) {
1024 return ((fsp->access_mask == DELETE_ACCESS) &&
1025 (fsp->oplock_type == NO_OPLOCK));
1026 }
1027
1028 /*
1029 * Send a break message to the oplock holder and delay the open for
1030 * our client.
1031 */
1032
1033 static NTSTATUS send_break_message(files_struct *fsp,
1034 struct share_mode_entry *exclusive,
1035 uint64_t mid,
1036 int oplock_request)
1037 {
1038 NTSTATUS status;
1039 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1040
1041 DEBUG(10, ("Sending break request to PID %s\n",
1042 procid_str_static(&exclusive->pid)));
1043 exclusive->op_mid = mid;
1044
1045 /* Create the message. */
1046 share_mode_entry_to_message(msg, exclusive);
1047
1048 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1049 don't want this set in the share mode struct pointed to by lck. */
1050
1051 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1052 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1053 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1054 }
1055
1056 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1057 MSG_SMB_BREAK_REQUEST,
1058 (uint8 *)msg,
1059 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1060 if (!NT_STATUS_IS_OK(status)) {
1061 DEBUG(3, ("Could not send oplock break message: %s\n",
1062 nt_errstr(status)));
1063 }
1064
1065 return status;
1066 }
1067
1068 /*
1069 * Return share_mode_entry pointers for :
1070 * 1). Batch oplock entry.
1071 * 2). Batch or exclusive oplock entry (may be identical to #1).
1072 * bool have_level2_oplock
1073 * bool have_no_oplock.
1074 * Do internal consistency checks on the share mode for a file.
1075 */
1076
1077 static void find_oplock_types(files_struct *fsp,
1078 int oplock_request,
1079 struct share_mode_lock *lck,
1080 struct share_mode_entry **pp_batch,
1081 struct share_mode_entry **pp_ex_or_batch,
1082 bool *got_level2,
1083 bool *got_no_oplock)
1084 {
1085 int i;
1086
1087 *pp_batch = NULL;
1088 *pp_ex_or_batch = NULL;
1089 *got_level2 = false;
1090 *got_no_oplock = false;
1091
1092 /* Ignore stat or internal opens, as is done in
1093 delay_for_batch_oplocks() and
1094 delay_for_exclusive_oplocks().
1095 */
1096 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1097 return;
1098 }
1099
1100 for (i=0; i<lck->num_share_modes; i++) {
1101 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1102 continue;
1103 }
1104
1105 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1106 is_stat_open(lck->share_modes[i].access_mask)) {
1107 /* We ignore stat opens in the table - they
1108 always have NO_OPLOCK and never get or
1109 cause breaks. JRA. */
1110 continue;
1111 }
1112
1113 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1114 /* batch - can only be one. */
1115 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1116 smb_panic("Bad batch oplock entry.");
1117 }
1118 *pp_batch = &lck->share_modes[i];
1119 }
1120
1121 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1122 /* Exclusive or batch - can only be one. */
1123 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1124 smb_panic("Bad exclusive or batch oplock entry.");
1125 }
1126 *pp_ex_or_batch = &lck->share_modes[i];
1127 }
1128
1129 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1130 if (*pp_batch || *pp_ex_or_batch) {
1131 smb_panic("Bad levelII oplock entry.");
1132 }
1133 *got_level2 = true;
1134 }
1135
1136 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1137 if (*pp_batch || *pp_ex_or_batch) {
1138 smb_panic("Bad no oplock entry.");
1139 }
1140 *got_no_oplock = true;
1141 }
1142 }
1143 }
1144
1145 static bool delay_for_batch_oplocks(files_struct *fsp,
1146 uint64_t mid,
1147 int oplock_request,
1148 struct share_mode_entry *batch_entry)
1149 {
1150 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1151 return false;
1152 }
1153
1154 if (batch_entry != NULL) {
1155 /* Found a batch oplock */
1156 send_break_message(fsp, batch_entry, mid, oplock_request);
1157 return true;
1158 }
1159 return false;
1160 }
1161
1162 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1163 uint64_t mid,
1164 int oplock_request,
1165 struct share_mode_entry *ex_entry)
1166 {
1167 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1168 return false;
1169 }
1170
1171 if (ex_entry != NULL) {
1172 /* Found an exclusive or batch oplock */
1173 bool delay_it = is_delete_request(fsp) ?
1174 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1175 if (delay_it) {
1176 send_break_message(fsp, ex_entry, mid, oplock_request);
1177 return true;
1178 }
1179 }
1180 return false;
1181 }
1182
1183 static void grant_fsp_oplock_type(files_struct *fsp,
1184 const struct byte_range_lock *br_lck,
1185 int oplock_request,
1186 bool got_level2_oplock,
1187 bool got_a_none_oplock)
1188 {
1189 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1190 lp_level2_oplocks(SNUM(fsp->conn));
1191
1192 /* Start by granting what the client asked for,
1193 but ensure no SAMBA_PRIVATE bits can be set. */
1194 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1195
1196 if (oplock_request & INTERNAL_OPEN_ONLY) {
1197 /* No oplocks on internal open. */
1198 fsp->oplock_type = NO_OPLOCK;
1199 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1200 fsp->oplock_type, fsp_str_dbg(fsp)));
1201 return;
1202 } else if (br_lck && br_lck->num_locks > 0) {
1203 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1204 fsp_str_dbg(fsp)));
1205 fsp->oplock_type = NO_OPLOCK;
1206 }
1207
1208 if (is_stat_open(fsp->access_mask)) {
1209 /* Leave the value already set. */
1210 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1211 fsp->oplock_type, fsp_str_dbg(fsp)));
1212 return;
1213 }
1214
1215 /*
1216 * Match what was requested (fsp->oplock_type) with
1217 * what was found in the existing share modes.
1218 */
1219
1220 if (got_a_none_oplock) {
1221 fsp->oplock_type = NO_OPLOCK;
1222 } else if (got_level2_oplock) {
1223 if (fsp->oplock_type == NO_OPLOCK ||
1224 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1225 /* Store a level2 oplock, but don't tell the client */
1226 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1227 } else {
1228 fsp->oplock_type = LEVEL_II_OPLOCK;
1229 }
1230 } else {
1231 /* All share_mode_entries are placeholders or deferred.
1232 * Silently upgrade to fake levelII if the client didn't
1233 * ask for an oplock. */
1234 if (fsp->oplock_type == NO_OPLOCK) {
1235 /* Store a level2 oplock, but don't tell the client */
1236 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1237 }
1238 }
1239
1240 /*
1241 * Don't grant level2 to clients that don't want them
1242 * or if we've turned them off.
1243 */
1244 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1245 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1246 }
1247
1248 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1249 fsp->oplock_type, fsp_str_dbg(fsp)));
1250 }
1251
1252 bool request_timed_out(struct timeval request_time,
1253 struct timeval timeout)
1254 {
1255 struct timeval now, end_time;
1256 GetTimeOfDay(&now);
1257 end_time = timeval_sum(&request_time, &timeout);
1258 return (timeval_compare(&end_time, &now) < 0);
1259 }
1260
1261 /****************************************************************************
1262 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1263 ****************************************************************************/
1264
1265 static void defer_open(struct share_mode_lock *lck,
1266 struct timeval request_time,
1267 struct timeval timeout,
1268 struct smb_request *req,
1269 struct deferred_open_record *state)
1270 {
1271 int i;
1272
1273 /* Paranoia check */
1274
1275 for (i=0; i<lck->num_share_modes; i++) {
1276 struct share_mode_entry *e = &lck->share_modes[i];
1277
1278 if (is_deferred_open_entry(e) &&
1279 procid_is_me(&e->pid) &&
1280 (e->op_mid == req->mid)) {
1281 DEBUG(0, ("Trying to defer an already deferred "
1282 "request: mid=%llu, exiting\n",
1283 (unsigned long long)req->mid));
1284 exit_server("attempt to defer a deferred request");
1285 }
1286 }
1287
1288 /* End paranoia check */
1289
1290 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1291 "open entry for mid %llu\n",
1292 (unsigned int)request_time.tv_sec,
1293 (unsigned int)request_time.tv_usec,
1294 (unsigned long long)req->mid));
1295
1296 if (!push_deferred_open_message_smb(req, request_time, timeout,
1297 state->id, (char *)state, sizeof(*state))) {
1298 exit_server("push_deferred_open_message_smb failed");
1299 }
1300 add_deferred_open(lck, req->mid, request_time,
1301 sconn_server_id(req->sconn), state->id);
1302 }
1303
1304
1305 /****************************************************************************
1306 On overwrite open ensure that the attributes match.
1307 ****************************************************************************/
1308
1309 bool open_match_attributes(connection_struct *conn,
1310 uint32 old_dos_attr,
1311 uint32 new_dos_attr,
1312 mode_t existing_unx_mode,
1313 mode_t new_unx_mode,
1314 mode_t *returned_unx_mode)
1315 {
1316 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1317
1318 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1319 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1320
1321 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1322 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1323 *returned_unx_mode = new_unx_mode;
1324 } else {
1325 *returned_unx_mode = (mode_t)0;
1326 }
1327
1328 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1329 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1330 "returned_unx_mode = 0%o\n",
1331 (unsigned int)old_dos_attr,
1332 (unsigned int)existing_unx_mode,
1333 (unsigned int)new_dos_attr,
1334 (unsigned int)*returned_unx_mode ));
1335
1336 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1337 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1338 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1339 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1340 return False;
1341 }
1342 }
1343 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1344 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1345 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1346 return False;
1347 }
1348 }
1349 return True;
1350 }
1351
1352 /****************************************************************************
1353 Special FCB or DOS processing in the case of a sharing violation.
1354 Try and find a duplicated file handle.
1355 ****************************************************************************/
1356
1357 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1358 connection_struct *conn,
1359 files_struct *fsp_to_dup_into,
1360 const struct smb_filename *smb_fname,
1361 struct file_id id,
1362 uint16 file_pid,
1363 uint16 vuid,
1364 uint32 access_mask,
1365 uint32 share_access,
1366 uint32 create_options)
1367 {
1368 files_struct *fsp;
1369
1370 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1371 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1372
1373 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1374 fsp = file_find_di_next(fsp)) {
1375
1376 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1377 "vuid = %u, file_pid = %u, private_options = 0x%x "
1378 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1379 fsp->fh->fd, (unsigned int)fsp->vuid,
1380 (unsigned int)fsp->file_pid,
1381 (unsigned int)fsp->fh->private_options,
1382 (unsigned int)fsp->access_mask ));
1383
1384 if (fsp->fh->fd != -1 &&
1385 fsp->vuid == vuid &&
1386 fsp->file_pid == file_pid &&
1387 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1388 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1389 (fsp->access_mask & FILE_WRITE_DATA) &&
1390 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1391 strequal(fsp->fsp_name->stream_name,
1392 smb_fname->stream_name)) {
1393 DEBUG(10,("fcb_or_dos_open: file match\n"));
1394 break;
1395 }
1396 }
1397
1398 if (!fsp) {
1399 return NT_STATUS_NOT_FOUND;
1400 }
1401
1402 /* quite an insane set of semantics ... */
1403 if (is_executable(smb_fname->base_name) &&
1404 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1405 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1406 return NT_STATUS_INVALID_PARAMETER;
1407 }
1408
1409 /* We need to duplicate this fsp. */
1410 return dup_file_fsp(req, fsp, access_mask, share_access,
1411 create_options, fsp_to_dup_into);
1412 }
1413
1414 static void schedule_defer_open(struct share_mode_lock *lck,
1415 struct timeval request_time,
1416 struct smb_request *req)
1417 {
1418 struct deferred_open_record state;
1419
1420 /* This is a relative time, added to the absolute
1421 request_time value to get the absolute timeout time.
1422 Note that if this is the second or greater time we enter
1423 this codepath for this particular request mid then
1424 request_time is left as the absolute time of the *first*
1425 time this request mid was processed. This is what allows
1426 the request to eventually time out. */
1427
1428 struct timeval timeout;
1429
1430 /* Normally the smbd we asked should respond within
1431 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1432 * the client did, give twice the timeout as a safety
1433 * measure here in case the other smbd is stuck
1434 * somewhere else. */
1435
1436 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1437
1438 /* Nothing actually uses state.delayed_for_oplocks
1439 but it's handy to differentiate in debug messages
1440 between a 30 second delay due to oplock break, and
1441 a 1 second delay for share mode conflicts. */
1442
1443 state.delayed_for_oplocks = True;
1444 state.id = lck->id;
1445
1446 if (!request_timed_out(request_time, timeout)) {
1447 defer_open(lck, request_time, timeout, req, &state);
1448 }
1449 }
1450
1451 /****************************************************************************
1452 Work out what access_mask to use from what the client sent us.
1453 ****************************************************************************/
1454
1455 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1456 const struct smb_filename *smb_fname,
1457 bool file_existed,
1458 uint32_t access_mask,
1459 uint32_t *access_mask_out)
1460 {
1461 NTSTATUS status;
1462 uint32_t orig_access_mask = access_mask;
1463 uint32_t rejected_share_access;
1464
1465 /*
1466 * Convert GENERIC bits to specific bits.
1467 */
1468
1469 se_map_generic(&access_mask, &file_generic_mapping);
1470
1471 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1472 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1473 if (get_current_uid(conn) == (uid_t)0) {
1474 access_mask |= FILE_GENERIC_ALL;
1475 } else if (file_existed) {
1476
1477 struct security_descriptor *sd;
1478 uint32_t access_granted = 0;
1479
1480 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1481 (SECINFO_OWNER |
1482 SECINFO_GROUP |
1483 SECINFO_DACL),&sd);
1484
1485 if (!NT_STATUS_IS_OK(status)) {
1486 DEBUG(10,("smbd_calculate_access_mask: "
1487 "Could not get acl on file %s: %s\n",
1488 smb_fname_str_dbg(smb_fname),
1489 nt_errstr(status)));
1490 return NT_STATUS_ACCESS_DENIED;
1491 }
1492
1493 /*
1494 * Never test FILE_READ_ATTRIBUTES. se_access_check()
1495 * also takes care of owner WRITE_DAC and READ_CONTROL.
1496 */
1497 status = se_access_check(sd,
1498 get_current_nttok(conn),
1499 (access_mask & ~FILE_READ_ATTRIBUTES),
1500 &access_granted);
1501
1502 TALLOC_FREE(sd);
1503
1504 if (!NT_STATUS_IS_OK(status)) {
1505 DEBUG(10, ("smbd_calculate_access_mask: "
1506 "Access denied on file %s: "
1507 "when calculating maximum access\n",
1508 smb_fname_str_dbg(smb_fname)));
1509 return NT_STATUS_ACCESS_DENIED;
1510 }
1511
1512 access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1513 } else {
1514 access_mask = FILE_GENERIC_ALL;
1515 }
1516
1517 access_mask &= conn->share_access;
1518 }
1519
1520 rejected_share_access = access_mask & ~(conn->share_access);
1521
1522 if (rejected_share_access) {
1523 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1524 "file %s: rejected by share access mask[0x%08X] "
1525 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1526 smb_fname_str_dbg(smb_fname),
1527 conn->share_access,
1528 orig_access_mask, access_mask,
1529 rejected_share_access));
1530 return NT_STATUS_ACCESS_DENIED;
1531 }
1532
1533 *access_mask_out = access_mask;
1534 return NT_STATUS_OK;
1535 }
1536
1537 /****************************************************************************
1538 Remove the deferred open entry under lock.
1539 ****************************************************************************/
1540
1541 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1542 struct server_id pid)
1543 {
1544 struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1545 NULL, NULL, NULL);
1546 if (lck == NULL) {
1547 DEBUG(0, ("could not get share mode lock\n"));
1548 return;
1549 }
1550 del_deferred_open_entry(lck, mid, pid);
1551 TALLOC_FREE(lck);
1552 }
1553
1554 /****************************************************************
1555 Ensure we get the brlock lock followed by the share mode lock
1556 in the correct order to prevent deadlocks if other smbd's are
1557 using the brlock database on this file simultaneously with this open
1558 (that code also gets the locks in brlock -> share mode lock order).
1559 ****************************************************************/
1560
1561 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1562 files_struct *fsp,
1563 const struct file_id id,
1564 const char *connectpath,
1565 const struct smb_filename *smb_fname,
1566 const struct timespec *p_old_write_time,
1567 struct share_mode_lock **p_lck,
1568 struct byte_range_lock **p_br_lck)
1569 {
1570 /* Ordering - we must get the br_lck for this
1571 file before the share mode. */
1572 if (lp_locking(fsp->conn->params)) {
1573 *p_br_lck = brl_get_locks_readonly(fsp);
1574 if (*p_br_lck == NULL) {
1575 DEBUG(0, ("Could not get br_lock\n"));
1576 return false;
1577 }
1578 /* Note - we don't need to free the returned
1579 br_lck explicitly as it was allocated on talloc_tos()
1580 and so will be autofreed (and release the lock)
1581 once the frame context disappears.
1582
1583 If it was set to fsp->brlock_rec then it was
1584 talloc_move'd to hang off the fsp pointer and
1585 in this case is guarenteed to not be holding the
1586 lock on the brlock database. */
1587 }
1588
1589 *p_lck = get_share_mode_lock(mem_ctx,
1590 id,
1591 connectpath,
1592 smb_fname,
1593 p_old_write_time);
1594
1595 if (*p_lck == NULL) {
1596 DEBUG(0, ("Could not get share mode lock\n"));
1597 TALLOC_FREE(*p_br_lck);
1598 return false;
1599 }
1600 return true;
1601 }
1602
1603 /****************************************************************************
1604 Open a file with a share mode. Passed in an already created files_struct *.
1605 ****************************************************************************/
1606
1607 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1608 struct smb_request *req,
1609 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1610 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1611 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1612 uint32 create_options, /* options such as delete on close. */
1613 uint32 new_dos_attributes, /* attributes used for new file. */
1614 int oplock_request, /* internal Samba oplock codes. */
1615 /* Information (FILE_EXISTS etc.) */
1616 uint32_t private_flags, /* Samba specific flags. */
1617 int *pinfo,
1618 files_struct *fsp)
1619 {
1620 struct smb_filename *smb_fname = fsp->fsp_name;
1621 int flags=0;
1622 int flags2=0;
1623 bool file_existed = VALID_STAT(smb_fname->st);
1624 bool def_acl = False;
1625 bool posix_open = False;
1626 bool new_file_created = False;
1627 bool clear_ads = false;
1628 struct file_id id;
1629 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1630 mode_t new_unx_mode = (mode_t)0;
1631 mode_t unx_mode = (mode_t)0;
1632 int info;
1633 uint32 existing_dos_attributes = 0;
1634 struct timeval request_time = timeval_zero();
1635 struct share_mode_lock *lck = NULL;
1636 uint32 open_access_mask = access_mask;
1637 NTSTATUS status;
1638 char *parent_dir;
1639
1640 ZERO_STRUCT(id);
1641
1642 if (conn->printer) {
1643 /*
1644 * Printers are handled completely differently.
1645 * Most of the passed parameters are ignored.
1646 */
1647
1648 if (pinfo) {
1649 *pinfo = FILE_WAS_CREATED;
1650 }
1651
1652 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1653 smb_fname_str_dbg(smb_fname)));
1654
1655 if (!req) {
1656 DEBUG(0,("open_file_ntcreate: printer open without "
1657 "an SMB request!\n"));
1658 return NT_STATUS_INTERNAL_ERROR;
1659 }
1660
1661 return print_spool_open(fsp, smb_fname->base_name,
1662 req->vuid);
1663 }
1664
1665 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1666 NULL)) {
1667 return NT_STATUS_NO_MEMORY;
1668 }
1669
1670 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1671 posix_open = True;
1672 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1673 new_dos_attributes = 0;
1674 } else {
1675 /* Windows allows a new file to be created and
1676 silently removes a FILE_ATTRIBUTE_DIRECTORY
1677 sent by the client. Do the same. */
1678
1679 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1680
1681 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1682 * created new. */
1683 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1684 smb_fname, parent_dir);
1685 }
1686
1687 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1688 "access_mask=0x%x share_access=0x%x "
1689 "create_disposition = 0x%x create_options=0x%x "
1690 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1691 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1692 access_mask, share_access, create_disposition,
1693 create_options, (unsigned int)unx_mode, oplock_request,
1694 (unsigned int)private_flags));
1695
1696 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1697 DEBUG(0, ("No smb request but not an internal only open!\n"));
1698 return NT_STATUS_INTERNAL_ERROR;
1699 }
1700
1701 /*
1702 * Only non-internal opens can be deferred at all
1703 */
1704
1705 if (req) {
1706 void *ptr;
1707 if (get_deferred_open_message_state(req,
1708 &request_time,
1709 &ptr)) {
1710
1711 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1712 /* Remember the absolute time of the original
1713 request with this mid. We'll use it later to
1714 see if this has timed out. */
1715
1716 /* Remove the deferred open entry under lock. */
1717 remove_deferred_open_entry(
1718 state->id, req->mid,
1719 sconn_server_id(req->sconn));
1720
1721 /* Ensure we don't reprocess this message. */
1722 remove_deferred_open_message_smb(req->sconn, req->mid);
1723 }
1724 }
1725
1726 status = check_name(conn, smb_fname->base_name);
1727 if (!NT_STATUS_IS_OK(status)) {
1728 return status;
1729 }
1730
1731 if (!posix_open) {
1732 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1733 if (file_existed) {
1734 existing_dos_attributes = dos_mode(conn, smb_fname);
1735 }
1736 }
1737
1738 /* ignore any oplock requests if oplocks are disabled */
1739 if (!lp_oplocks(SNUM(conn)) ||
1740 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1741 /* Mask off everything except the private Samba bits. */
1742 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1743 }
1744
1745 /* this is for OS/2 long file names - say we don't support them */
1746 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1747 /* OS/2 Workplace shell fix may be main code stream in a later
1748 * release. */
1749 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1750 "supported.\n"));
1751 if (use_nt_status()) {
1752 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1753 }
1754 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1755 }
1756
1757 switch( create_disposition ) {
1758 /*
1759 * Currently we're using FILE_SUPERSEDE as the same as
1760 * FILE_OVERWRITE_IF but they really are
1761 * different. FILE_SUPERSEDE deletes an existing file
1762 * (requiring delete access) then recreates it.
1763 */
1764 case FILE_SUPERSEDE:
1765 /* If file exists replace/overwrite. If file doesn't
1766 * exist create. */
1767 flags2 |= (O_CREAT | O_TRUNC);
1768 clear_ads = true;
1769 break;
1770
1771 case FILE_OVERWRITE_IF:
1772 /* If file exists replace/overwrite. If file doesn't
1773 * exist create. */
1774 flags2 |= (O_CREAT | O_TRUNC);
1775 clear_ads = true;
1776 break;
1777
1778 case FILE_OPEN:
1779 /* If file exists open. If file doesn't exist error. */
1780 if (!file_existed) {
1781 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1782 "requested for file %s and file "
1783 "doesn't exist.\n",
1784 smb_fname_str_dbg(smb_fname)));
1785 errno = ENOENT;
1786 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1787 }
1788 break;
1789
1790 case FILE_OVERWRITE:
1791 /* If file exists overwrite. If file doesn't exist
1792 * error. */
1793 if (!file_existed) {
1794 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1795 "requested for file %s and file "
1796 "doesn't exist.\n",
1797 smb_fname_str_dbg(smb_fname) ));
1798 errno = ENOENT;
1799 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1800 }
1801 flags2 |= O_TRUNC;
1802 clear_ads = true;
1803 break;
1804
1805 case FILE_CREATE:
1806 /* If file exists error. If file doesn't exist
1807 * create. */
1808 if (file_existed) {
1809 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1810 "requested for file %s and file "
1811 "already exists.\n",
1812 smb_fname_str_dbg(smb_fname)));
1813 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1814 errno = EISDIR;
1815 } else {
1816 errno = EEXIST;
1817 }
1818 return map_nt_error_from_unix(errno);
1819 }
1820 flags2 |= (O_CREAT|O_EXCL);
1821 break;
1822
1823 case FILE_OPEN_IF:
1824 /* If file exists open. If file doesn't exist
1825 * create. */
1826 flags2 |= O_CREAT;
1827 break;
1828
1829 default:
1830 return NT_STATUS_INVALID_PARAMETER;
1831 }
1832
1833 /* We only care about matching attributes on file exists and
1834 * overwrite. */
1835
1836 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1837 (create_disposition == FILE_OVERWRITE_IF))) {
1838 if (!open_match_attributes(conn, existing_dos_attributes,
1839 new_dos_attributes,
1840 smb_fname->st.st_ex_mode,
1841 unx_mode, &new_unx_mode)) {
1842 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1843 "for file %s (%x %x) (0%o, 0%o)\n",
1844 smb_fname_str_dbg(smb_fname),
1845 existing_dos_attributes,
1846 new_dos_attributes,
1847 (unsigned int)smb_fname->st.st_ex_mode,
1848 (unsigned int)unx_mode ));
1849 errno = EACCES;
1850 return NT_STATUS_ACCESS_DENIED;
1851 }
1852 }
1853
1854 status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1855 access_mask,
1856 &access_mask);
1857 if (!NT_STATUS_IS_OK(status)) {
1858 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1859 "on file %s returned %s\n",
1860 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1861 return status;
1862 }
1863
1864 open_access_mask = access_mask;
1865
1866 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1867 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1868 }
1869
1870 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1871 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1872 access_mask));
1873
1874 /*
1875 * Note that we ignore the append flag as append does not
1876 * mean the same thing under DOS and Unix.
1877 */
1878
1879 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1880 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1881 /* DENY_DOS opens are always underlying read-write on the
1882 file handle, no matter what the requested access mask
1883 says. */
1884 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1885 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1886 flags = O_RDWR;
1887 } else {
1888 flags = O_WRONLY;
1889 }
1890 } else {
1891 flags = O_RDONLY;
1892 }
1893
1894 /*
1895 * Currently we only look at FILE_WRITE_THROUGH for create options.
1896 */
1897
1898 #if defined(O_SYNC)
1899 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1900 flags2 |= O_SYNC;
1901 }
1902 #endif /* O_SYNC */
1903
1904 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1905 flags2 |= O_APPEND;
1906 }
1907
1908 if (!posix_open && !CAN_WRITE(conn)) {
1909 /*
1910 * We should really return a permission denied error if either
1911 * O_CREAT or O_TRUNC are set, but for compatibility with
1912 * older versions of Samba we just AND them out.
1913 */
1914 flags2 &= ~(O_CREAT|O_TRUNC);
1915 }
1916
1917 /*
1918 * Ensure we can't write on a read-only share or file.
1919 */
1920
1921 if (flags != O_RDONLY && file_existed &&
1922 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1923 DEBUG(5,("open_file_ntcreate: write access requested for "
1924 "file %s on read only %s\n",
1925 smb_fname_str_dbg(smb_fname),
1926 !CAN_WRITE(conn) ? "share" : "file" ));
1927 errno = EACCES;
1928 return NT_STATUS_ACCESS_DENIED;
1929 }
1930
1931 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1932 fsp->share_access = share_access;
1933 fsp->fh->private_options = private_flags;
1934 fsp->access_mask = open_access_mask; /* We change this to the
1935 * requested access_mask after
1936 * the open is done. */
1937 fsp->posix_open = posix_open;
1938
1939 /* Ensure no SAMBA_PRIVATE bits can be set. */
1940 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1941
1942 if (timeval_is_zero(&request_time)) {
1943 request_time = fsp->open_time;
1944 }
1945
1946 if (file_existed) {
1947 struct byte_range_lock *br_lck = NULL;
1948 struct share_mode_entry *batch_entry = NULL;
1949 struct share_mode_entry *exclusive_entry = NULL;
1950 bool got_level2_oplock = false;
1951 bool got_a_none_oplock = false;
1952
1953 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1954 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1955
1956 if (!acquire_ordered_locks(talloc_tos(),
1957 fsp,
1958 id,
1959 conn->connectpath,
1960 smb_fname,
1961 &old_write_time,
1962 &lck,
1963 &br_lck)) {
1964 return NT_STATUS_SHARING_VIOLATION;
1965 }
1966
1967 /* Get the types we need to examine. */
1968 find_oplock_types(fsp,
1969 oplock_request,
1970 lck,
1971 &batch_entry,
1972 &exclusive_entry,
1973 &got_level2_oplock,
1974 &got_a_none_oplock);
1975
1976 /* First pass - send break only on batch oplocks. */
1977 if ((req != NULL) &&
1978 delay_for_batch_oplocks(fsp,
1979 req->mid,
1980 oplock_request,
1981 batch_entry)) {
1982 schedule_defer_open(lck, request_time, req);
1983 TALLOC_FREE(lck);
1984 return NT_STATUS_SHARING_VIOLATION;
1985 }
1986
1987 /* Use the client requested access mask here, not the one we
1988 * open with. */
1989 status = open_mode_check(conn, lck, fsp->name_hash,
1990 access_mask, share_access,
1991 create_options, &file_existed);
1992
1993 if (NT_STATUS_IS_OK(status)) {
1994 /* We might be going to allow this open. Check oplock
1995 * status again. */
1996 /* Second pass - send break for both batch or
1997 * exclusive oplocks. */
1998 if ((req != NULL) &&
1999 delay_for_exclusive_oplocks(
2000 fsp,
2001 req->mid,
2002 oplock_request,
2003 exclusive_entry)) {
2004 schedule_defer_open(lck, request_time, req);
2005 TALLOC_FREE(lck);
2006 return NT_STATUS_SHARING_VIOLATION;
2007 }
2008 }
2009
2010 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2011 /* DELETE_PENDING is not deferred for a second */
2012 TALLOC_FREE(lck);
2013 return status;
2014 }
2015
2016 grant_fsp_oplock_type(fsp,
2017 br_lck,
2018 oplock_request,
2019 got_level2_oplock,
2020 got_a_none_oplock);
2021
2022 if (!NT_STATUS_IS_OK(status)) {
2023 uint32 can_access_mask;
2024 bool can_access = True;
2025
2026 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2027
2028 /* Check if this can be done with the deny_dos and fcb
2029 * calls. */
2030 if (private_flags &
2031 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2032 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2033 if (req == NULL) {
2034 DEBUG(0, ("DOS open without an SMB "
2035 "request!\n"));
2036 TALLOC_FREE(lck);
2037 return NT_STATUS_INTERNAL_ERROR;
2038 }
2039
2040 /* Use the client requested access mask here,
2041 * not the one we open with. */
2042 status = fcb_or_dos_open(req,
2043 conn,
2044 fsp,
2045 smb_fname,
2046 id,
2047 req->smbpid,
2048 req->vuid,
2049 access_mask,
2050 share_access,
2051 create_options);
2052
2053 if (NT_STATUS_IS_OK(status)) {
2054 TALLOC_FREE(lck);
2055 if (pinfo) {
2056 *pinfo = FILE_WAS_OPENED;
2057 }
2058 return NT_STATUS_OK;
2059 }
2060 }
2061
2062 /*
2063 * This next line is a subtlety we need for
2064 * MS-Access. If a file open will fail due to share
2065 * permissions and also for security (access) reasons,
2066 * we need to return the access failed error, not the
2067 * share error. We can't open the file due to kernel
2068 * oplock deadlock (it's possible we failed above on
2069 * the open_mode_check()) so use a userspace check.
2070 */
2071
2072 if (flags & O_RDWR) {
2073 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2074 } else if (flags & O_WRONLY) {
2075 can_access_mask = FILE_WRITE_DATA;
2076 } else {
2077 can_access_mask = FILE_READ_DATA;
2078 }
2079
2080 if (((can_access_mask & FILE_WRITE_DATA) &&
2081 !CAN_WRITE(conn)) ||
2082 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2083 smb_fname, can_access_mask))) {
2084 can_access = False;
2085 }
2086
2087 /*
2088 * If we're returning a share violation, ensure we
2089 * cope with the braindead 1 second delay.
2090 */
2091
2092 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2093 lp_defer_sharing_violations()) {
2094 struct timeval timeout;
2095 struct deferred_open_record state;
2096 int timeout_usecs;
2097
2098 /* this is a hack to speed up torture tests
2099 in 'make test' */
2100 timeout_usecs = lp_parm_int(SNUM(conn),
2101 "smbd","sharedelay",
2102 SHARING_VIOLATION_USEC_WAIT);
2103
2104 /* This is a relative time, added to the absolute
2105 request_time value to get the absolute timeout time.
2106 Note that if this is the second or greater time we enter
2107 this codepath for this particular request mid then
2108 request_time is left as the absolute time of the *first*
2109 time this request mid was processed. This is what allows
2110 the request to eventually time out. */
2111
2112 timeout = timeval_set(0, timeout_usecs);
2113
2114 /* Nothing actually uses state.delayed_for_oplocks
2115 but it's handy to differentiate in debug messages
2116 between a 30 second delay due to oplock break, and
2117 a 1 second delay for share mode conflicts. */
2118
2119 state.delayed_for_oplocks = False;
2120 state.id = id;
2121
2122 if ((req != NULL)
2123 && !request_timed_out(request_time,
2124 timeout)) {
2125 defer_open(lck, request_time, timeout,
2126 req, &state);
2127 }
2128 }
2129
2130 TALLOC_FREE(lck);
2131 if (can_access) {
2132 /*
2133 * We have detected a sharing violation here
2134 * so return the correct error code
2135 */
2136 status = NT_STATUS_SHARING_VIOLATION;
2137 } else {
2138 status = NT_STATUS_ACCESS_DENIED;
2139 }
2140 return status;
2141 }
2142
2143 /*
2144 * We exit this block with the share entry *locked*.....
2145 */
2146 }
2147
2148 SMB_ASSERT(!file_existed || (lck != NULL));
2149
2150 /*
2151 * Ensure we pay attention to default ACLs on directories if required.
2152 */
2153
2154 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2155 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2156 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2157 }
2158
2159 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2160 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2161 (unsigned int)flags, (unsigned int)flags2,
2162 (unsigned int)unx_mode, (unsigned int)access_mask,
2163 (unsigned int)open_access_mask));
2164
2165 /*
2166 * open_file strips any O_TRUNC flags itself.
2167 */
2168
2169 fsp_open = open_file(fsp, conn, req, parent_dir,
2170 flags|flags2, unx_mode, access_mask,
2171 open_access_mask);
2172
2173 if (!NT_STATUS_IS_OK(fsp_open)) {
2174 TALLOC_FREE(lck);
2175 return fsp_open;
2176 }
2177
2178 if (!file_existed) {
2179 struct byte_range_lock *br_lck = NULL;
2180 struct share_mode_entry *batch_entry = NULL;
2181 struct share_mode_entry *exclusive_entry = NULL;
2182 bool got_level2_oplock = false;
2183 bool got_a_none_oplock = false;
2184 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2185 /*
2186 * Deal with the race condition where two smbd's detect the
2187 * file doesn't exist and do the create at the same time. One
2188 * of them will win and set a share mode, the other (ie. this
2189 * one) should check if the requested share mode for this
2190 * create is allowed.
2191 */
2192
2193 /*
2194 * Now the file exists and fsp is successfully opened,
2195 * fsp->dev and fsp->inode are valid and should replace the
2196 * dev=0,inode=0 from a non existent file. Spotted by
2197 * Nadav Danieli <nadavd@exanet.com>. JRA.
2198 */
2199
2200 id = fsp->file_id;
2201
2202 if (!acquire_ordered_locks(talloc_tos(),
2203 fsp,
2204 id,
2205 conn->connectpath,
2206 smb_fname,
2207 &old_write_time,
2208 &lck,
2209 &br_lck)) {
2210 return NT_STATUS_SHARING_VIOLATION;
2211 }
2212
2213 /* Get the types we need to examine. */
2214 find_oplock_types(fsp,
2215 oplock_request,
2216 lck,
2217 &batch_entry,
2218 &exclusive_entry,
2219 &got_level2_oplock,
2220 &got_a_none_oplock);
2221
2222 /* First pass - send break only on batch oplocks. */
2223 if ((req != NULL) &&
2224 delay_for_batch_oplocks(fsp,
2225 req->mid,
2226 oplock_request,
2227 batch_entry)) {
2228 schedule_defer_open(lck, request_time, req);
2229 TALLOC_FREE(lck);
2230 fd_close(fsp);
2231 return NT_STATUS_SHARING_VIOLATION;
2232 }
2233
2234 status = open_mode_check(conn, lck, fsp->name_hash,
2235 access_mask, share_access,
2236 create_options, &file_existed);
2237
2238 if (NT_STATUS_IS_OK(status)) {
2239 /* We might be going to allow this open. Check oplock
2240 * status again. */
2241 /* Second pass - send break for both batch or
2242 * exclusive oplocks. */
2243 if ((req != NULL) &&
2244 delay_for_exclusive_oplocks(
2245 fsp,
2246 req->mid,
2247 oplock_request,
2248 exclusive_entry)) {
2249 schedule_defer_open(lck, request_time, req);
2250 TALLOC_FREE(lck);
2251 fd_close(fsp);
2252 return NT_STATUS_SHARING_VIOLATION;
2253 }
2254 }
2255
2256 if (!NT_STATUS_IS_OK(status)) {
2257 struct deferred_open_record state;
2258
2259 state.delayed_for_oplocks = False;
2260 state.id = id;
2261
2262 /* Do it all over again immediately. In the second
2263 * round we will find that the file existed and handle
2264 * the DELETE_PENDING and FCB cases correctly. No need
2265 * to duplicate the code here. Essentially this is a
2266 * "goto top of this function", but don't tell
2267 * anybody... */
2268
2269 if (req != NULL) {
2270 defer_open(lck, request_time, timeval_zero(),
2271 req, &state);
2272 }
2273 TALLOC_FREE(lck);
2274 fd_close(fsp);
2275 return status;
2276 }
2277
2278 grant_fsp_oplock_type(fsp,
2279 br_lck,
2280 oplock_request,
2281 got_level2_oplock,
2282 got_a_none_oplock);
2283
2284 /*
2285 * We exit this block with the share entry *locked*.....
2286 */
2287
2288 }
2289
2290 SMB_ASSERT(lck != NULL);
2291
2292 /* Delete streams if create_disposition requires it */
2293 if (file_existed && clear_ads &&
2294 !is_ntfs_stream_smb_fname(smb_fname)) {
2295 status = delete_all_streams(conn, smb_fname->base_name);
2296 if (!NT_STATUS_IS_OK(status)) {
2297 TALLOC_FREE(lck);
2298 fd_close(fsp);
2299 return status;
2300 }
2301 }
2302
2303 /* note that we ignore failure for the following. It is
2304 basically a hack for NFS, and NFS will never set one of
2305 these only read them. Nobody but Samba can ever set a deny
2306 mode and we have already checked our more authoritative
2307 locking database for permission to set this deny mode. If
2308 the kernel refuses the operations then the kernel is wrong.
2309 note that GPFS supports it as well - jmcd */
2310
2311 if (fsp->fh->fd != -1) {
2312 int ret_flock;
2313 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2314 if(ret_flock == -1 ){
2315
2316 TALLOC_FREE(lck);
2317 fd_close(fsp);
2318
2319 return NT_STATUS_SHARING_VIOLATION;
2320 }
2321 }
2322
2323 /*
2324 * At this point onwards, we can guarentee that the share entry
2325 * is locked, whether we created the file or not, and that the
2326 * deny mode is compatible with all current opens.
2327 */
2328
2329 /*
2330 * If requested, truncate the file.
2331 */
2332
2333 if (file_existed && (flags2&O_TRUNC)) {
2334 /*
2335 * We are modifing the file after open - update the stat
2336 * struct..
2337 */
2338 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2339 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2340 status = map_nt_error_from_unix(errno);
2341 TALLOC_FREE(lck);
2342 fd_close(fsp);
2343 return status;
2344 }
2345 }
2346
2347 /*
2348 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2349 * but we don't have to store this - just ignore it on access check.
2350 */
2351 if (conn->sconn->using_smb2) {
2352 /*
2353 * SMB2 doesn't return it (according to Microsoft tests).
2354 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2355 * File created with access = 0x7 (Read, Write, Delete)
2356 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2357 */
2358 fsp->access_mask = access_mask;
2359 } else {
2360 /* But SMB1 does. */
2361 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2362 }
2363
2364 if (file_existed) {
2365 /* stat opens on existing files don't get oplocks. */
2366 if (is_stat_open(open_access_mask)) {
2367 fsp->oplock_type = NO_OPLOCK;
2368 }
2369
2370 if (!(flags2 & O_TRUNC)) {
2371 info = FILE_WAS_OPENED;
2372 } else {
2373 info = FILE_WAS_OVERWRITTEN;
2374 }
2375 } else {
2376 info = FILE_WAS_CREATED;
2377 }
2378
2379 if (pinfo) {
2380 *pinfo = info;
2381 }
2382
2383 /*
2384 * Setup the oplock info in both the shared memory and
2385 * file structs.
2386 */
2387
2388 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2389 /*
2390 * Could not get the kernel oplock or there are byte-range
2391 * locks on the file.
2392 */
2393 fsp->oplock_type = NO_OPLOCK;
2394 }
2395
2396 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2397 new_file_created = True;
2398 }
2399
2400 set_share_mode(lck, fsp, get_current_uid(conn),
2401 req ? req->mid : 0,
2402 fsp->oplock_type);
2403
2404 /* Handle strange delete on close create semantics. */
2405 if (create_options & FILE_DELETE_ON_CLOSE) {
2406
2407 status = can_set_delete_on_close(fsp, new_dos_attributes);
2408
2409 if (!NT_STATUS_IS_OK(status)) {
2410 /* Remember to delete the mode we just added. */
2411 del_share_mode(lck, fsp);
2412 TALLOC_FREE(lck);
2413 fd_close(fsp);
2414 return status;
2415 }
2416 /* Note that here we set the *inital* delete on close flag,
2417 not the regular one. The magic gets handled in close. */
2418 fsp->initial_delete_on_close = True;
2419 }
2420
2421 if (new_file_created) {
2422 /* Files should be initially set as archive */
2423 if (lp_map_archive(SNUM(conn)) ||
2424 lp_store_dos_attributes(SNUM(conn))) {
2425 if (!posix_open) {
2426 if (file_set_dosmode(conn, smb_fname,
2427 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2428 parent_dir, true) == 0) {
2429 unx_mode = smb_fname->st.st_ex_mode;
2430 }
2431 }
2432 }
2433 }
2434
2435 /* Determine sparse flag. */
2436 if (posix_open) {
2437 /* POSIX opens are sparse by default. */
2438 fsp->is_sparse = true;
2439 } else {
2440 fsp->is_sparse = (file_existed &&
2441 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2442 }
2443
2444 /*
2445 * Take care of inherited ACLs on created files - if default ACL not
2446 * selected.
2447 */
2448
2449 if (!posix_open && !file_existed && !def_acl) {
2450
2451 int saved_errno = errno; /* We might get ENOSYS in the next
2452 * call.. */
2453
2454 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2455 errno == ENOSYS) {
2456 errno = saved_errno; /* Ignore ENOSYS */
2457 }
2458
2459 } else if (new_unx_mode) {
2460
2461 int ret = -1;
2462
2463 /* Attributes need changing. File already existed. */
2464
2465 {
2466 int saved_errno = errno; /* We might get ENOSYS in the
2467 * next call.. */
2468 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2469
2470 if (ret == -1 && errno == ENOSYS) {
2471 errno = saved_errno; /* Ignore ENOSYS */
2472 } else {
2473 DEBUG(5, ("open_file_ntcreate: reset "
2474 "attributes of file %s to 0%o\n",
2475 smb_fname_str_dbg(smb_fname),
2476 (unsigned int)new_unx_mode));
2477 ret = 0; /* Don't do the fchmod below. */
2478 }
2479 }
2480
2481 if ((ret == -1) &&
2482 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2483 DEBUG(5, ("open_file_ntcreate: failed to reset "
2484 "attributes of file %s to 0%o\n",
2485 smb_fname_str_dbg(smb_fname),
2486 (unsigned int)new_unx_mode));
2487 }
2488
2489 /* If this is a successful open, we must remove any deferred open
2490 * records. */
2491 if (req != NULL) {
2492 del_deferred_open_entry(lck, req->mid,
2493 sconn_server_id(req->sconn));
2494 }
2495 TALLOC_FREE(lck);
2496
2497 return NT_STATUS_OK;
2498 }
2499
2500
2501 /****************************************************************************
2502 Open a file for for write to ensure that we can fchmod it.
2503 ****************************************************************************/
2504
2505 NTSTATUS open_file_fchmod(connection_struct *conn,
2506 struct smb_filename *smb_fname,
2507 files_struct **result)
2508 {
2509 if (!VALID_STAT(smb_fname->st)) {
2510 return NT_STATUS_INVALID_PARAMETER;
2511 }
2512
2513 return SMB_VFS_CREATE_FILE(
2514 conn, /* conn */
2515 NULL, /* req */
2516 0, /* root_dir_fid */
2517 smb_fname, /* fname */
2518 FILE_WRITE_DATA, /* access_mask */
2519 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2520 FILE_SHARE_DELETE),
2521 FILE_OPEN, /* create_disposition*/
2522 0, /* create_options */
2523 0, /* file_attributes */
2524 INTERNAL_OPEN_ONLY, /* oplock_request */
2525 0, /* allocation_size */
2526 0, /* private_flags */
2527 NULL, /* sd */
2528 NULL, /* ea_list */
2529 result, /* result */
2530 NULL); /* pinfo */
2531 }
2532
2533 static NTSTATUS mkdir_internal(connection_struct *conn,
2534 struct smb_filename *smb_dname,
2535 uint32 file_attributes)
2536 {
2537 mode_t mode;
2538 char *parent_dir = NULL;
2539 NTSTATUS status;
2540 bool posix_open = false;
2541 bool need_re_stat = false;
2542 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2543
2544 if(access_mask & ~(conn->share_access)) {
2545 DEBUG(5,("mkdir_internal: failing share access "
2546 "%s\n", lp_servicename(SNUM(conn))));
2547 return NT_STATUS_ACCESS_DENIED;
2548 }
2549
2550 status = check_name(conn, smb_dname->base_name);
2551 if (!NT_STATUS_IS_OK(status)) {
2552 return status;
2553 }
2554
2555 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2556 NULL)) {
2557 return NT_STATUS_NO_MEMORY;
2558 }
2559
2560 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2561 posix_open = true;
2562 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2563 } else {
2564 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2565 }
2566
2567 status = check_parent_access(conn,
2568 smb_dname,
2569 access_mask,
2570 &parent_dir);
2571 if(!NT_STATUS_IS_OK(status)) {
2572 DEBUG(5,("mkdir_internal: check_parent_access "
2573 "on directory %s for path %s returned %s\n",
2574 parent_dir,
2575 smb_dname->base_name,
2576 nt_errstr(status) ));
2577 return status;
2578 }
2579
2580 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2581 return map_nt_error_from_unix(errno);
2582 }
2583
2584 /* Ensure we're checking for a symlink here.... */
2585 /* We don't want to get caught by a symlink racer. */
2586
2587 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2588 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2589 smb_fname_str_dbg(smb_dname), strerror(errno)));
2590 return map_nt_error_from_unix(errno);
2591 }
2592
2593 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2594 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2595 smb_fname_str_dbg(smb_dname)));
2596 return NT_STATUS_NOT_A_DIRECTORY;
2597 }
2598
2599 if (lp_store_dos_attributes(SNUM(conn))) {
2600 if (!posix_open) {
2601 file_set_dosmode(conn, smb_dname,
2602 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2603 parent_dir, true);
2604 }
2605 }
2606
2607 if (lp_inherit_perms(SNUM(conn))) {
2608 inherit_access_posix_acl(conn, parent_dir,
2609 smb_dname->base_name, mode);
2610 need_re_stat = true;
2611 }
2612
2613 if (!posix_open) {
2614 /*
2615 * Check if high bits should have been set,
2616 * then (if bits are missing): add them.
2617 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2618 * dir.
2619 */
2620 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2621 (mode & ~smb_dname->st.st_ex_mode)) {
2622 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2623 (smb_dname->st.st_ex_mode |
2624 (mode & ~smb_dname->st.st_ex_mode)));
2625 need_re_stat = true;
2626 }
2627 }
2628
2629 /* Change the owner if required. */
2630 if (lp_inherit_owner(SNUM(conn))) {
2631 change_dir_owner_to_parent(conn, parent_dir,
2632 smb_dname->base_name,
2633 &smb_dname->st);
2634 need_re_stat = true;
2635 }
2636
2637 if (need_re_stat) {
2638 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2639 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2640 smb_fname_str_dbg(smb_dname), strerror(errno)));
2641 return map_nt_error_from_unix(errno);
2642 }
2643 }
2644
2645 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2646 smb_dname->base_name);
2647
2648 return NT_STATUS_OK;
2649 }
2650
2651 /****************************************************************************
2652 Ensure we didn't get symlink raced on opening a directory.
2653 ****************************************************************************/
2654
2655 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2656 const SMB_STRUCT_STAT *sbuf2)
2657 {
2658 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2659 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2660 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2661 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2662 return false;
2663 }
2664 return true;
2665 }
2666
2667 /****************************************************************************
2668 Open a directory from an NT SMB call.
2669 ****************************************************************************/
2670
2671 static NTSTATUS open_directory(connection_struct *conn,
2672 struct smb_request *req,
2673 struct smb_filename *smb_dname,
2674 uint32 access_mask,
2675 uint32 share_access,
2676 uint32 create_disposition,
2677 uint32 create_options,
2678 uint32 file_attributes,
2679 int *pinfo,
2680 files_struct **result)
2681 {
2682 files_struct *fsp = NULL;
2683 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2684 struct share_mode_lock *lck = NULL;
2685 NTSTATUS status;
2686 struct timespec mtimespec;
2687 int info = 0;
2688
2689 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2690
2691 /* Ensure we have a directory attribute. */
2692 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2693
2694 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2695 "share_access = 0x%x create_options = 0x%x, "
2696 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2697 smb_fname_str_dbg(smb_dname),
2698 (unsigned int)access_mask,
2699 (unsigned int)share_access,
2700 (unsigned int)create_options,
2701 (unsigned int)create_disposition,
2702 (unsigned int)file_attributes));
2703
2704 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2705 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2706 is_ntfs_stream_smb_fname(smb_dname)) {
2707 DEBUG(2, ("open_directory: %s is a stream name!\n",
2708 smb_fname_str_dbg(smb_dname)));
2709 return NT_STATUS_NOT_A_DIRECTORY;
2710 }
2711
2712 status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2713 access_mask, &access_mask);
2714 if (!NT_STATUS_IS_OK(status)) {
2715 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2716 "on file %s returned %s\n",
2717 smb_fname_str_dbg(smb_dname),
2718 nt_errstr(status)));
2719 return status;
2720 }
2721
2722 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2723 !security_token_has_privilege(get_current_nttok(conn),
2724 SEC_PRIV_SECURITY)) {
2725 DEBUG(10, ("open_directory: open on %s "
2726 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2727 smb_fname_str_dbg(smb_dname)));
2728 return NT_STATUS_PRIVILEGE_NOT_HELD;
2729 }
2730
2731 switch( create_disposition ) {
2732 case FILE_OPEN:
2733
2734 if (!dir_existed) {
2735 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2736 }
2737
2738 info = FILE_WAS_OPENED;
2739 break;
2740
2741 case FILE_CREATE:
2742
2743 /* If directory exists error. If directory doesn't
2744 * exist create. */
2745
2746 if (dir_existed) {
2747 status = NT_STATUS_OBJECT_NAME_COLLISION;
2748 DEBUG(2, ("open_directory: unable to create "
2749 "%s. Error was %s\n",
2750 smb_fname_str_dbg(smb_dname),
2751 nt_errstr(status)));
2752 return status;
2753 }
2754
2755 status = mkdir_internal(conn, smb_dname,
2756 file_attributes);
2757
2758 if (!NT_STATUS_IS_OK(status)) {
2759 DEBUG(2, ("open_directory: unable to create "
2760 "%s. Error was %s\n",
2761 smb_fname_str_dbg(smb_dname),
2762 nt_errstr(status)));
2763 return status;
2764 }
2765
2766 info = FILE_WAS_CREATED;
2767 break;
2768
2769 case FILE_OPEN_IF:
2770 /*
2771 * If directory exists open. If directory doesn't
2772 * exist create.
2773 */
2774
2775 if (dir_existed) {
2776 status = NT_STATUS_OK;
2777 info = FILE_WAS_OPENED;
2778 } else {
2779 status = mkdir_internal(conn, smb_dname,
2780 file_attributes);
2781
2782 if (NT_STATUS_IS_OK(status)) {
2783 info = FILE_WAS_CREATED;
2784 } else {
2785 /* Cope with create race. */
2786 if (!NT_STATUS_EQUAL(status,
2787 NT_STATUS_OBJECT_NAME_COLLISION)) {
2788 DEBUG(2, ("open_directory: unable to create "
2789 "%s. Error was %s\n",
2790 smb_fname_str_dbg(smb_dname),
2791 nt_errstr(status)));
2792 return status;
2793 }
2794 info = FILE_WAS_OPENED;
2795 }
2796 }
2797
2798 break;
2799
2800 case FILE_SUPERSEDE:
2801 case FILE_OVERWRITE:
2802 case FILE_OVERWRITE_IF:
2803 default:
2804 DEBUG(5,("open_directory: invalid create_disposition "
2805 "0x%x for directory %s\n",
2806 (unsigned int)create_disposition,
2807 smb_fname_str_dbg(smb_dname)));
2808 return NT_STATUS_INVALID_PARAMETER;
2809 }
2810
2811 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2812 DEBUG(5,("open_directory: %s is not a directory !\n",
2813 smb_fname_str_dbg(smb_dname)));
2814 return NT_STATUS_NOT_A_DIRECTORY;
2815 }
2816
2817 if (info == FILE_WAS_OPENED) {
2818 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2819 if (!NT_STATUS_IS_OK(status)) {
2820 DEBUG(10, ("open_directory: smbd_check_access_rights on "
2821 "file %s failed with %s\n",
2822 smb_fname_str_dbg(smb_dname),
2823 nt_errstr(status)));
2824 return status;
2825 }
2826 }
2827
2828 status = file_new(req, conn, &fsp);
2829 if(!NT_STATUS_IS_OK(status)) {
2830 return status;
2831 }
2832
2833 /*
2834 * Setup the files_struct for it.
2835 */
2836
2837 fsp->mode = smb_dname->st.st_ex_mode;
2838 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2839 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2840 fsp->file_pid = req ? req->smbpid : 0;
2841 fsp->can_lock = False;
2842 fsp->can_read = False;
2843 fsp->can_write = False;
2844
2845 fsp->share_access = share_access;
2846 fsp->fh->private_options = 0;
2847 /*
2848 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2849 */
2850 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2851 fsp->print_file = NULL;
2852 fsp->modified = False;
2853 fsp->oplock_type = NO_OPLOCK;
2854 fsp->sent_oplock_break = NO_BREAK_SENT;
2855 fsp->is_directory = True;
2856 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2857 status = fsp_set_smb_fname(fsp, smb_dname);
2858 if (!NT_STATUS_IS_OK(status)) {
2859 file_free(req, fsp);
2860 return status;
2861 }
2862
2863 mtimespec = smb_dname->st.st_ex_mtime;
2864
2865 #ifdef O_DIRECTORY
2866 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2867 #else
2868 /* POSIX allows us to open a directory with O_RDONLY. */
2869 status = fd_open(conn, fsp, O_RDONLY, 0);
2870 #endif
2871 if (!NT_STATUS_IS_OK(status)) {
2872 DEBUG(5, ("open_directory: Could not open fd for "
2873 "%s (%s)\n",
2874 smb_fname_str_dbg(smb_dname),
2875 nt_errstr(status)));
2876 file_free(req, fsp);
2877 return status;
2878 }
2879
2880 status = vfs_stat_fsp(fsp);
2881 if (!NT_STATUS_IS_OK(status)) {
2882 fd_close(fsp);
2883 file_free(req, fsp);
2884 return status;
2885 }
2886
2887 /* Ensure there was no race condition. */
2888 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2889 DEBUG(5,("open_directory: stat struct differs for "
2890 "directory %s.\n",
2891 smb_fname_str_dbg(smb_dname)));
2892 fd_close(fsp);
2893 file_free(req, fsp);
2894 return NT_STATUS_ACCESS_DENIED;
2895 }
2896
2897 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2898 conn->connectpath, smb_dname, &mtimespec);
2899
2900 if (lck == NULL) {
2901 DEBUG(0, ("open_directory: Could not get share mode lock for "
2902 "%s\n", smb_fname_str_dbg(smb_dname)));
2903 fd_close(fsp);
2904 file_free(req, fsp);
2905 return NT_STATUS_SHARING_VIOLATION;
2906 }
2907
2908 status = open_mode_check(conn, lck, fsp->name_hash,
2909 access_mask, share_access,
2910 create_options, &dir_existed);
2911
2912 if (!NT_STATUS_IS_OK(status)) {
2913 TALLOC_FREE(lck);
2914 fd_close(fsp);
2915 file_free(req, fsp);
2916 return status;
2917 }
2918
2919 set_share_mode(lck, fsp, get_current_uid(conn),
2920 req ? req->mid : 0, NO_OPLOCK);
2921
2922 /* For directories the delete on close bit at open time seems
2923 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2924 if (create_options & FILE_DELETE_ON_CLOSE) {
2925 status = can_set_delete_on_close(fsp, 0);
2926 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2927 TALLOC_FREE(lck);
2928 fd_close(fsp);
2929 file_free(req, fsp);
2930 return status;
2931 }
2932
2933 if (NT_STATUS_IS_OK(status)) {
2934 /* Note that here we set the *inital* delete on close flag,
2935 not the regular one. The magic gets handled in close. */
2936 fsp->initial_delete_on_close = True;
2937 }
2938 }
2939
2940 TALLOC_FREE(lck);
2941
2942 if (pinfo) {
2943 *pinfo = info;
2944 }
2945
2946 *result = fsp;
2947 return NT_STATUS_OK;
2948 }
2949
2950 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2951 struct smb_filename *smb_dname)
2952 {
2953 NTSTATUS status;
2954 files_struct *fsp;
2955
2956 status = SMB_VFS_CREATE_FILE(
2957 conn, /* conn */
2958 req, /* req */
2959 0, /* root_dir_fid */
2960 smb_dname, /* fname */
2961 FILE_READ_ATTRIBUTES, /* access_mask */
2962 FILE_SHARE_NONE, /* share_access */
2963 FILE_CREATE, /* create_disposition*/
2964 FILE_DIRECTORY_FILE, /* create_options */
2965 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2966 0, /* oplock_request */
2967 0, /* allocation_size */
2968 0, /* private_flags */
2969 NULL, /* sd */
2970 NULL, /* ea_list */
2971 &fsp, /* result */
2972 NULL); /* pinfo */
2973
2974 if (NT_STATUS_IS_OK(status)) {
2975 close_file(req, fsp, NORMAL_CLOSE);
2976 }
2977
2978 return status;
2979 }
2980
2981 /****************************************************************************
2982 Receive notification that one of our open files has been renamed by another
2983 smbd process.
2984 ****************************************************************************/
2985
2986 void msg_file_was_renamed(struct messaging_context *msg,
2987 void *private_data,
2988 uint32_t msg_type,
2989 struct server_id server_id,
2990 DATA_BLOB *data)
2991 {
2992 files_struct *fsp;
2993 char *frm = (char *)data->data;
2994 struct file_id id;
2995 const char *sharepath;
2996 const char *base_name;
2997 const char *stream_name;
2998 struct smb_filename *smb_fname = NULL;
2999 size_t sp_len, bn_len;
3000 NTSTATUS status;
3001 struct smbd_server_connection *sconn =
3002 talloc_get_type_abort(private_data,
3003 struct smbd_server_connection);
3004
3005 if (data->data == NULL
3006 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3007 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3008 (int)data->length));
3009 return;
3010 }
3011
3012 /* Unpack the message. */
3013 pull_file_id_24(frm, &id);
3014 sharepath = &frm[24];
3015 sp_len = strlen(sharepath);
3016 base_name = sharepath + sp_len + 1;
3017 bn_len = strlen(base_name);
3018 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3019
3020 /* stream_name must always be NULL if there is no stream. */
3021 if (stream_name[0] == '\0') {
3022 stream_name = NULL;
3023 }
3024
3025 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3026 stream_name, NULL, &smb_fname);
3027 if (!NT_STATUS_IS_OK(status)) {
3028 return;
3029 }
3030
3031 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3032 "file_id %s\n",
3033 sharepath, smb_fname_str_dbg(smb_fname),
3034 file_id_string_tos(&id)));
3035
3036 for(fsp = file_find_di_first(sconn, id); fsp;
3037 fsp = file_find_di_next(fsp)) {
3038 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3039
3040 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3041 fsp->fnum, fsp_str_dbg(fsp),
3042 smb_fname_str_dbg(smb_fname)));
3043 status = fsp_set_smb_fname(fsp, smb_fname);
3044 if (!NT_STATUS_IS_OK(status)) {
3045 goto out;
3046 }
3047 } else {
3048 /* TODO. JRA. */
3049 /* Now we have the complete path we can work out if this is
3050 actually within this share and adjust newname accordingly. */
3051 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3052 "not sharepath %s) "
3053 "fnum %d from %s -> %s\n",
3054 fsp->conn->connectpath,
3055 sharepath,
3056 fsp->fnum,
3057 fsp_str_dbg(fsp),
3058 smb_fname_str_dbg(smb_fname)));
3059 }
3060 }
3061 out:
3062 TALLOC_FREE(smb_fname);
3063 return;
3064 }
3065
3066 /*
3067 * If a main file is opened for delete, all streams need to be checked for
3068 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3069 * If that works, delete them all by setting the delete on close and close.
3070 */
3071
3072 NTSTATUS open_streams_for_delete(connection_struct *conn,
3073 const char *fname)
3074 {
3075 struct stream_struct *stream_info = NULL;
3076 files_struct **streams = NULL;
3077 int i;
3078 unsigned int num_streams = 0;
3079 TALLOC_CTX *frame = talloc_stackframe();
3080 NTSTATUS status;
3081
3082 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3083 &num_streams, &stream_info);
3084
3085 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3086 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3087 DEBUG(10, ("no streams around\n"));
3088 TALLOC_FREE(frame);
3089 return NT_STATUS_OK;
3090 }
3091
3092 if (!NT_STATUS_IS_OK(status)) {
3093 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3094 nt_errstr(status)));
3095 goto fail;
3096 }
3097
3098 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3099 num_streams));
3100
3101 if (num_streams == 0) {
3102 TALLOC_FREE(frame);
3103 return NT_STATUS_OK;
3104 }
3105
3106 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3107 if (streams == NULL) {
3108 DEBUG(0, ("talloc failed\n"));
3109 status = NT_STATUS_NO_MEMORY;
3110 goto fail;
3111 }
3112
3113 for (i=0; i<num_streams; i++) {
3114 struct smb_filename *smb_fname = NULL;
3115
3116 if (strequal(stream_info[i].name, "::$DATA")) {
3117 streams[i] = NULL;
3118 continue;
3119 }
3120
3121 status = create_synthetic_smb_fname(talloc_tos(), fname,
3122 stream_info[i].name,
3123 NULL, &smb_fname);
3124 if (!NT_STATUS_IS_OK(status)) {
3125 goto fail;
3126 }
3127
3128 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3129 DEBUG(10, ("Unable to stat stream: %s\n",
3130 smb_fname_str_dbg(smb_fname)));
3131 }
3132
3133 status = SMB_VFS_CREATE_FILE(
3134 conn, /* conn */
3135 NULL, /* req */
3136 0, /* root_dir_fid */
3137 smb_fname, /* fname */
3138 DELETE_ACCESS, /* access_mask */
3139 (FILE_SHARE_READ | /* share_access */
3140 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3141 FILE_OPEN, /* create_disposition*/
3142 0, /* create_options */
3143 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3144 0, /* oplock_request */
3145 0, /* allocation_size */
3146 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3147 NULL, /* sd */
3148 NULL, /* ea_list */
3149 &streams[i], /* result */
3150 NULL); /* pinfo */
3151
3152 if (!NT_STATUS_IS_OK(status)) {
3153 DEBUG(10, ("Could not open stream %s: %s\n",
3154 smb_fname_str_dbg(smb_fname),
3155 nt_errstr(status)));
3156
3157 TALLOC_FREE(smb_fname);
3158 break;
3159 }
3160 TALLOC_FREE(smb_fname);
3161 }
3162
3163 /*
3164 * don't touch the variable "status" beyond this point :-)
3165 */
3166
3167 for (i -= 1 ; i >= 0; i--) {
3168 if (streams[i] == NULL) {
3169 continue;
3170 }
3171
3172 DEBUG(10, ("Closing stream # %d, %s\n", i,
3173 fsp_str_dbg(streams[i])));
3174 close_file(NULL, streams[i], NORMAL_CLOSE);
3175 }
3176
3177 fail:
3178 TALLOC_FREE(frame);
3179 return status;
3180 }
3181
3182 /*********************************************************************
3183 Create a default ACL by inheriting from the parent. If no inheritance
3184 from the parent available, don't set anything. This will leave the actual
3185 permissions the new file or directory already got from the filesystem
3186 as the NT ACL when read.
3187 *********************************************************************/
3188
3189 static NTSTATUS inherit_new_acl(files_struct *fsp)
3190 {
3191 TALLOC_CTX *ctx = talloc_tos();
3192 char *parent_name = NULL;
3193 struct security_descriptor *parent_desc = NULL;
3194 NTSTATUS status = NT_STATUS_OK;
3195 struct security_descriptor *psd = NULL;
3196 struct dom_sid *owner_sid = NULL;
3197 struct dom_sid *group_sid = NULL;
3198 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3199 bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3200 bool inheritable_components = false;
3201 size_t size = 0;
3202
3203 if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3204 return NT_STATUS_NO_MEMORY;
3205 }
3206
3207 status = SMB_VFS_GET_NT_ACL(fsp->conn,
3208 parent_name,
3209 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3210 &parent_desc);
3211 if (!NT_STATUS_IS_OK(status)) {
3212 return status;
3213 }
3214
3215 inheritable_components = sd_has_inheritable_components(parent_desc,
3216 fsp->is_directory);
3217
3218 if (!inheritable_components && !inherit_owner) {
3219 /* Nothing to inherit and not setting owner. */
3220 return NT_STATUS_OK;
3221 }
3222
3223 /* Create an inherited descriptor from the parent. */
3224
3225 if (DEBUGLEVEL >= 10) {
3226 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3227 fsp_str_dbg(fsp) ));
3228 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3229 }
3230
3231 /* Inherit from parent descriptor if "inherit owner" set. */
3232 if (inherit_owner) {
3233 owner_sid = parent_desc->owner_sid;
3234 group_sid = parent_desc->group_sid;
3235 }
3236
3237 if (owner_sid == NULL) {
3238 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3239 }
3240 if (group_sid == NULL) {
3241 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3242 }
3243
3244 status = se_create_child_secdesc(ctx,
3245 &psd,
3246 &size,
3247 parent_desc,
3248 owner_sid,
3249 group_sid,
3250 fsp->is_directory);
3251 if (!NT_STATUS_IS_OK(status)) {
3252 return status;
3253 }
3254
3255 /* If inheritable_components == false,
3256 se_create_child_secdesc()
3257 creates a security desriptor with a NULL dacl
3258 entry, but with SEC_DESC_DACL_PRESENT. We need
3259 to remove that flag. */
3260
3261 if (!inheritable_components) {
3262 security_info_sent &= ~SECINFO_DACL;
3263 psd->type &= ~SEC_DESC_DACL_PRESENT;
3264 }
3265
3266 if (DEBUGLEVEL >= 10) {
3267 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3268 fsp_str_dbg(fsp) ));
3269 NDR_PRINT_DEBUG(security_descriptor, psd);
3270 }
3271
3272 if (inherit_owner) {
3273 /* We need to be root to force this. */
3274 become_root();
3275 }
3276 status = SMB_VFS_FSET_NT_ACL(fsp,
3277 security_info_sent,
3278 psd);
3279 if (inherit_owner) {
3280 unbecome_root();
3281 }
3282 return status;
3283 }
3284
3285 /*
3286 * Wrapper around open_file_ntcreate and open_directory
3287 */
3288
3289 static NTSTATUS create_file_unixpath(connection_struct *conn,
3290 struct smb_request *req,
3291 struct smb_filename *smb_fname,
3292 uint32_t access_mask,
3293 uint32_t share_access,
3294 uint32_t create_disposition,
3295 uint32_t create_options,
3296 uint32_t file_attributes,
3297 uint32_t oplock_request,
3298 uint64_t allocation_size,
3299 uint32_t private_flags,
3300 struct security_descriptor *sd,
3301 struct ea_list *ea_list,
3302
3303 files_struct **result,
3304 int *pinfo)
3305 {
3306 int info = FILE_WAS_OPENED;
3307 files_struct *base_fsp = NULL;
3308 files_struct *fsp = NULL;
3309 NTSTATUS status;
3310
3311 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3312 "file_attributes = 0x%x, share_access = 0x%x, "
3313 "create_disposition = 0x%x create_options = 0x%x "
3314 "oplock_request = 0x%x private_flags = 0x%x "
3315 "ea_list = 0x%p, sd = 0x%p, "
3316 "fname = %s\n",
3317 (unsigned int)access_mask,
3318 (unsigned int)file_attributes,
3319 (unsigned int)share_access,
3320 (unsigned int)create_disposition,
3321 (unsigned int)create_options,
3322 (unsigned int)oplock_request,
3323 (unsigned int)private_flags,
3324 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3325
3326 if (create_options & FILE_OPEN_BY_FILE_ID) {
3327 status = NT_STATUS_NOT_SUPPORTED;
3328 goto fail;
3329 }
3330
3331 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3332 status = NT_STATUS_INVALID_PARAMETER;
3333 goto fail;
3334 }
3335
3336 if (req == NULL) {
3337 oplock_request |= INTERNAL_OPEN_ONLY;
3338 }
3339
3340 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3341 && (access_mask & DELETE_ACCESS)
3342 && !is_ntfs_stream_smb_fname(smb_fname)) {
3343 /*
3344 * We can't open a file with DELETE access if any of the
3345 * streams is open without FILE_SHARE_DELETE
3346 */
3347 status = open_streams_for_delete(conn, smb_fname->base_name);
3348
3349 if (!NT_STATUS_IS_OK(status)) {
3350 goto fail;
3351 }
3352 }
3353
3354 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3355 !security_token_has_privilege(get_current_nttok(conn),
3356 SEC_PRIV_SECURITY)) {
3357 DEBUG(10, ("create_file_unixpath: open on %s "
3358 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3359 smb_fname_str_dbg(smb_fname)));
3360 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3361 goto fail;
3362 }
3363
3364 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3365 && is_ntfs_stream_smb_fname(smb_fname)
3366 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3367 uint32 base_create_disposition;
3368 struct smb_filename *smb_fname_base = NULL;
3369
3370 if (create_options & FILE_DIRECTORY_FILE) {
3371 status = NT_STATUS_NOT_A_DIRECTORY;
3372 goto fail;
3373 }
3374
3375 switch (create_disposition) {
3376 case FILE_OPEN:
3377 base_create_disposition = FILE_OPEN;
3378 break;
3379 default:
3380 base_create_disposition = FILE_OPEN_IF;
3381 break;
3382 }
3383
3384 /* Create an smb_filename with stream_name == NULL. */
3385 status = create_synthetic_smb_fname(talloc_tos(),
3386 smb_fname->base_name,
3387 NULL, NULL,
3388 &smb_fname_base);
3389 if (!NT_STATUS_IS_OK(status)) {
3390 goto fail;
3391 }
3392
3393 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3394 DEBUG(10, ("Unable to stat stream: %s\n",
3395 smb_fname_str_dbg(smb_fname_base)));
3396 }
3397
3398 /* Open the base file. */
3399 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3400 FILE_SHARE_READ
3401 | FILE_SHARE_WRITE
3402 | FILE_SHARE_DELETE,
3403 base_create_disposition,
3404 0, 0, 0, 0, 0, NULL, NULL,
3405 &base_fsp, NULL);
3406 TALLOC_FREE(smb_fname_base);
3407
3408 if (!NT_STATUS_IS_OK(status)) {
3409 DEBUG(10, ("create_file_unixpath for base %s failed: "
3410 "%s\n", smb_fname->base_name,
3411 nt_errstr(status)));
3412 goto fail;
3413 }
3414 /* we don't need to low level fd */
3415 fd_close(base_fsp);
3416 }
3417
3418 /*
3419 * If it's a request for a directory open, deal with it separately.
3420 */
3421
3422 if (create_options & FILE_DIRECTORY_FILE) {
3423
3424 if (create_options & FILE_NON_DIRECTORY_FILE) {
3425 status = NT_STATUS_INVALID_PARAMETER;
3426 goto fail;
3427 }
3428
3429 /* Can't open a temp directory. IFS kit test. */
3430 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3431 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3432 status = NT_STATUS_INVALID_PARAMETER;
3433 goto fail;
3434 }
3435
3436 /*
3437 * We will get a create directory here if the Win32
3438 * app specified a security descriptor in the
3439 * CreateDirectory() call.
3440 */
3441
3442 oplock_request = 0;
3443 status = open_directory(
3444 conn, req, smb_fname, access_mask, share_access,
3445 create_disposition, create_options, file_attributes,
3446 &info, &fsp);
3447 } else {
3448
3449 /*
3450 * Ordinary file case.
3451 */
3452
3453 status = file_new(req, conn, &fsp);
3454 if(!NT_STATUS_IS_OK(status)) {
3455 goto fail;
3456 }
3457
3458 status = fsp_set_smb_fname(fsp, smb_fname);
3459 if (!NT_STATUS_IS_OK(status)) {
3460 goto fail;
3461 }
3462
3463 /*
3464 * We're opening the stream element of a base_fsp
3465 * we already opened. Set up the base_fsp pointer.
3466 */
3467 if (base_fsp) {
3468 fsp->base_fsp = base_fsp;
3469 }
3470
3471 status = open_file_ntcreate(conn,
3472 req,
3473 access_mask,
3474 share_access,
3475 create_disposition,
3476 create_options,
3477 file_attributes,
3478 oplock_request,
3479 private_flags,
3480 &info,
3481 fsp);
3482
3483 if(!NT_STATUS_IS_OK(status)) {
3484 file_free(req, fsp);
3485 fsp = NULL;
3486 }
3487
3488 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3489
3490 /* A stream open never opens a directory */
3491
3492 if (base_fsp) {
3493 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3494 goto fail;
3495 }
3496
3497 /*
3498 * Fail the open if it was explicitly a non-directory
3499 * file.
3500 */
3501
3502 if (create_options & FILE_NON_DIRECTORY_FILE) {
3503 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3504 goto fail;
3505 }
3506
3507 oplock_request = 0;
3508 status = open_directory(
3509 conn, req, smb_fname, access_mask,
3510 share_access, create_disposition,
3511 create_options, file_attributes,
3512 &info, &fsp);
3513 }
3514 }
3515
3516 if (!NT_STATUS_IS_OK(status)) {
3517 goto fail;
3518 }
3519
3520 fsp->base_fsp = base_fsp;
3521
3522 if ((ea_list != NULL) &&
3523 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3524 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3525 if (!NT_STATUS_IS_OK(status)) {
3526 goto fail;
3527 }
3528 }
3529
3530 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3531 status = NT_STATUS_ACCESS_DENIED;
3532 goto fail;
3533 }
3534
3535 /* Save the requested allocation size. */
3536 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3537 if (allocation_size
3538 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3539 fsp->initial_allocation_size = smb_roundup(
3540 fsp->conn, allocation_size);
3541 if (fsp->is_directory) {
3542 /* Can't set allocation size on a directory. */
3543 status = NT_STATUS_ACCESS_DENIED;
3544 goto fail;
3545 }
3546 if (vfs_allocate_file_space(
3547 fsp, fsp->initial_allocation_size) == -1) {
3548 status = NT_STATUS_DISK_FULL;
3549 goto fail;
3550 }
3551 } else {
3552 fsp->initial_allocation_size = smb_roundup(
3553 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3554 }
3555 }
3556
3557 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3558 fsp->base_fsp == NULL) {
3559 if (sd != NULL) {
3560 /*
3561 * According to the MS documentation, the only time the security
3562 * descriptor is applied to the opened file is iff we *created* the
3563 * file; an existing file stays the same.
3564 *
3565 * Also, it seems (from observation) that you can open the file with
3566 * any access mask but you can still write the sd. We need to override
3567 * the granted access before we call set_sd
3568 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3569 */
3570
3571 uint32_t sec_info_sent;
3572 uint32_t saved_access_mask = fsp->access_mask;
3573
3574 sec_info_sent = get_sec_info(sd);
3575
3576 fsp->access_mask = FILE_GENERIC_ALL;
3577
3578 /* Convert all the generic bits. */
3579 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3580 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3581
3582 if (sec_info_sent & (SECINFO_OWNER|
3583 SECINFO_GROUP|
3584 SECINFO_DACL|
3585 SECINFO_SACL)) {
3586 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3587 }
3588
3589 fsp->access_mask = saved_access_mask;
3590
3591 if (!NT_STATUS_IS_OK(status)) {
3592 goto fail;
3593 }
3594 } else if (lp_inherit_acls(SNUM(conn))) {
3595 /* Inherit from parent. Errors here are not fatal. */
3596 status = inherit_new_acl(fsp);
3597 if (!NT_STATUS_IS_OK(status)) {
3598 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3599 fsp_str_dbg(fsp),
3600 nt_errstr(status) ));
3601 }
3602 }
3603 }
3604
3605 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3606
3607 *result = fsp;
3608 if (pinfo != NULL) {
3609 *pinfo = info;
3610 }
3611
3612 smb_fname->st = fsp->fsp_name->st;
3613
3614 return NT_STATUS_OK;
3615
3616 fail:
3617 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3618
3619 if (fsp != NULL) {
3620 if (base_fsp && fsp->base_fsp == base_fsp) {
3621 /*
3622 * The close_file below will close
3623 * fsp->base_fsp.
3624 */
3625 base_fsp = NULL;
3626 }
3627 close_file(req, fsp, ERROR_CLOSE);
3628 fsp = NULL;
3629 }
3630 if (base_fsp != NULL) {
3631 close_file(req, base_fsp, ERROR_CLOSE);
3632 base_fsp = NULL;
3633 }
3634 return status;
3635 }
3636
3637 /*
3638 * Calculate the full path name given a relative fid.
3639 */
3640 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3641 struct smb_request *req,
3642 uint16_t root_dir_fid,
3643 const struct smb_filename *smb_fname,
3644 struct smb_filename **smb_fname_out)
3645 {
3646 files_struct *dir_fsp;
3647 char *parent_fname = NULL;
3648 char *new_base_name = NULL;
3649 NTSTATUS status;
3650
3651 if (root_dir_fid == 0 || !smb_fname) {
3652 status = NT_STATUS_INTERNAL_ERROR;
3653 goto out;
3654 }
3655
3656 dir_fsp = file_fsp(req, root_dir_fid);
3657
3658 if (dir_fsp == NULL) {
3659 status = NT_STATUS_INVALID_HANDLE;
3660 goto out;
3661 }
3662
3663 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3664 status = NT_STATUS_INVALID_HANDLE;
3665 goto out;
3666 }
3667
3668 if (!dir_fsp->is_directory) {
3669
3670 /*
3671 * Check to see if this is a mac fork of some kind.
3672 */
3673
3674 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3675 is_ntfs_stream_smb_fname(smb_fname)) {
3676 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3677 goto out;
3678 }
3679
3680 /*
3681 we need to handle the case when we get a
3682 relative open relative to a file and the
3683 pathname is blank - this is a reopen!
3684 (hint from demyn plantenberg)
3685 */
3686
3687 status = NT_STATUS_INVALID_HANDLE;
3688 goto out;
3689 }
3690
3691 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3692 /*
3693 * We're at the toplevel dir, the final file name
3694 * must not contain ./, as this is filtered out
3695 * normally by srvstr_get_path and unix_convert
3696 * explicitly rejects paths containing ./.
3697 */
3698 parent_fname = talloc_strdup(talloc_tos(), "");
3699 if (parent_fname == NULL) {
3700 status = NT_STATUS_NO_MEMORY;
3701 goto out;
3702 }
3703 } else {
3704 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3705
3706 /*
3707 * Copy in the base directory name.
3708 */
3709
3710 parent_fname = talloc_array(talloc_tos(), char,
3711 dir_name_len+2);
3712 if (parent_fname == NULL) {
3713 status = NT_STATUS_NO_MEMORY;
3714 goto out;
3715 }
3716 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3717 dir_name_len+1);
3718
3719 /*
3720 * Ensure it ends in a '/'.
3721 * We used TALLOC_SIZE +2 to add space for the '/'.
3722 */
3723
3724 if(dir_name_len
3725 && (parent_fname[dir_name_len-1] != '\\')
3726 && (parent_fname[dir_name_len-1] != '/')) {
3727 parent_fname[dir_name_len] = '/';
3728 parent_fname[dir_name_len+1] = '\0';
3729 }
3730 }
3731
3732 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3733 smb_fname->base_name);
3734 if (new_base_name == NULL) {
3735 status = NT_STATUS_NO_MEMORY;
3736 goto out;
3737 }
3738
3739 status = filename_convert(req,
3740 conn,
3741 req->flags2 & FLAGS2_DFS_PATHNAMES,
3742 new_base_name,
3743 0,
3744 NULL,
3745 smb_fname_out);
3746 if (!NT_STATUS_IS_OK(status)) {
3747 goto out;
3748 }
3749
3750 out:
3751 TALLOC_FREE(parent_fname);
3752 TALLOC_FREE(new_base_name);
3753 return status;
3754 }
3755
3756 NTSTATUS create_file_default(connection_struct *conn,
3757 struct smb_request *req,
3758 uint16_t root_dir_fid,
3759 struct smb_filename *smb_fname,
3760 uint32_t access_mask,
3761 uint32_t share_access,
3762 uint32_t create_disposition,
3763 uint32_t create_options,
3764 uint32_t file_attributes,
3765 uint32_t oplock_request,
3766 uint64_t allocation_size,
3767 uint32_t private_flags,
3768 struct security_descriptor *sd,
3769 struct ea_list *ea_list,
3770 files_struct **result,
3771 int *pinfo)
3772 {
3773 int info = FILE_WAS_OPENED;
3774 files_struct *fsp = NULL;
3775 NTSTATUS status;
3776 bool stream_name = false;
3777
3778 DEBUG(10,("create_file: access_mask = 0x%x "
3779 "file_attributes = 0x%x, share_access = 0x%x, "
3780 "create_disposition = 0x%x create_options = 0x%x "
3781 "oplock_request = 0x%x "
3782 "private_flags = 0x%x "
3783 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3784 "fname = %s\n",
3785 (unsigned int)access_mask,
3786 (unsigned int)file_attributes,
3787 (unsigned int)share_access,
3788 (unsigned int)create_disposition,
3789 (unsigned int)create_options,
3790 (unsigned int)oplock_request,
3791 (unsigned int)private_flags,
3792 (unsigned int)root_dir_fid,
3793 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3794
3795 /*
3796 * Calculate the filename from the root_dir_if if necessary.
3797 */
3798
3799 if (root_dir_fid != 0) {
3800 struct smb_filename *smb_fname_out = NULL;
3801 status = get_relative_fid_filename(conn, req, root_dir_fid,
3802 smb_fname, &smb_fname_out);
3803 if (!NT_STATUS_IS_OK(status)) {
3804 goto fail;
3805 }
3806 smb_fname = smb_fname_out;
3807 }
3808
3809 /*
3810 * Check to see if this is a mac fork of some kind.
3811 */
3812
3813 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3814 if (stream_name) {
3815 enum FAKE_FILE_TYPE fake_file_type;
3816
3817 fake_file_type = is_fake_file(smb_fname);
3818
3819 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3820
3821 /*
3822 * Here we go! support for changing the disk quotas
3823 * --metze
3824 *
3825 * We need to fake up to open this MAGIC QUOTA file
3826 * and return a valid FID.
3827 *
3828 * w2k close this file directly after openening xp
3829 * also tries a QUERY_FILE_INFO on the file and then
3830 * close it
3831 */
3832 status = open_fake_file(req, conn, req->vuid,
3833 fake_file_type, smb_fname,
3834 access_mask, &fsp);
3835 if (!NT_STATUS_IS_OK(status)) {
3836 goto fail;
3837 }
3838
3839 ZERO_STRUCT(smb_fname->st);
3840 goto done;
3841 }
3842
3843 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3844 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3845 goto fail;
3846 }
3847 }
3848
3849 /* All file access must go through check_name() */
3850
3851 status = check_name(conn, smb_fname->base_name);
3852 if (!NT_STATUS_IS_OK(status)) {
3853 goto fail;
3854 }
3855
3856 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3857 int ret;
3858 smb_fname->stream_name = NULL;
3859 /* We have to handle this error here. */
3860 if (create_options & FILE_DIRECTORY_FILE) {
3861 status = NT_STATUS_NOT_A_DIRECTORY;
3862 goto fail;
3863 }
3864 if (lp_posix_pathnames()) {
3865 ret = SMB_VFS_LSTAT(conn, smb_fname);
3866 } else {
3867 ret = SMB_VFS_STAT(conn, smb_fname);
3868 }
3869
3870 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3871 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3872 goto fail;
3873 }
3874 }
3875
3876 status = create_file_unixpath(
3877 conn, req, smb_fname, access_mask, share_access,
3878 create_disposition, create_options, file_attributes,
3879 oplock_request, allocation_size, private_flags,
3880 sd, ea_list,
3881 &fsp, &info);
3882
3883 if (!NT_STATUS_IS_OK(status)) {
3884 goto fail;
3885 }
3886
3887 done:
3888 DEBUG(10, ("create_file: info=%d\n", info));
3889
3890 *result = fsp;
3891 if (pinfo != NULL) {
3892 *pinfo = info;
3893 }
3894 return NT_STATUS_OK;
3895
3896 fail:
3897 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3898
3899 if (fsp != NULL) {
3900 close_file(req, fsp, ERROR_CLOSE);
3901 fsp = NULL;
3902 }
3903 return status;
3904 }
Working branch of Samba for id10ts