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s3:smbd/open: use talloc_get_type_abort() as private_data can't be NULL
[Samba.git] / source3 / smbd / open.c
blob265de2718488f5ad7553cc436fc667f256863222
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 is_unused_share_mode_entry(share_entry)) {
916 goto panic;
917 }
918
919 if ((share_entry->op_type == NO_OPLOCK) &&
920 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
921 /* Someone has already written to it, but I haven't yet
922 * noticed */
923 return;
924 }
925
926 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
927 goto panic;
928 }
929
930 return;
931
932 panic:
933 {
934 char *str;
935 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
936 share_mode_str(talloc_tos(), num, share_entry) ));
937 str = talloc_asprintf(talloc_tos(),
938 "validate_my_share_entries: "
939 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
940 fsp->fsp_name->base_name,
941 (unsigned int)fsp->oplock_type,
942 (unsigned int)share_entry->op_type );
943 smb_panic(str);
944 }
945 }
946 #endif
947
948 bool is_stat_open(uint32 access_mask)
949 {
950 return (access_mask &&
951 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
952 FILE_WRITE_ATTRIBUTES))==0) &&
953 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
954 FILE_WRITE_ATTRIBUTES)) != 0));
955 }
956
957 /****************************************************************************
958 Deal with share modes
959 Invarient: Share mode must be locked on entry and exit.
960 Returns -1 on error, or number of share modes on success (may be zero).
961 ****************************************************************************/
962
963 static NTSTATUS open_mode_check(connection_struct *conn,
964 struct share_mode_lock *lck,
965 uint32_t name_hash,
966 uint32 access_mask,
967 uint32 share_access,
968 uint32 create_options,
969 bool *file_existed)
970 {
971 int i;
972
973 if(lck->num_share_modes == 0) {
974 return NT_STATUS_OK;
975 }
976
977 *file_existed = True;
978
979 /* A delete on close prohibits everything */
980
981 if (is_delete_on_close_set(lck, name_hash)) {
982 return NT_STATUS_DELETE_PENDING;
983 }
984
985 if (is_stat_open(access_mask)) {
986 /* Stat open that doesn't trigger oplock breaks or share mode
987 * checks... ! JRA. */
988 return NT_STATUS_OK;
989 }
990
991 /*
992 * Check if the share modes will give us access.
993 */
994
995 #if defined(DEVELOPER)
996 for(i = 0; i < lck->num_share_modes; i++) {
997 validate_my_share_entries(conn->sconn, i,
998 &lck->share_modes[i]);
999 }
1000 #endif
1001
1002 if (!lp_share_modes(SNUM(conn))) {
1003 return NT_STATUS_OK;
1004 }
1005
1006 /* Now we check the share modes, after any oplock breaks. */
1007 for(i = 0; i < lck->num_share_modes; i++) {
1008
1009 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1010 continue;
1011 }
1012
1013 /* someone else has a share lock on it, check to see if we can
1014 * too */
1015 if (share_conflict(&lck->share_modes[i],
1016 access_mask, share_access)) {
1017 return NT_STATUS_SHARING_VIOLATION;
1018 }
1019 }
1020
1021 return NT_STATUS_OK;
1022 }
1023
1024 static bool is_delete_request(files_struct *fsp) {
1025 return ((fsp->access_mask == DELETE_ACCESS) &&
1026 (fsp->oplock_type == NO_OPLOCK));
1027 }
1028
1029 /*
1030 * Send a break message to the oplock holder and delay the open for
1031 * our client.
1032 */
1033
1034 static NTSTATUS send_break_message(files_struct *fsp,
1035 struct share_mode_entry *exclusive,
1036 uint64_t mid,
1037 int oplock_request)
1038 {
1039 NTSTATUS status;
1040 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1041
1042 DEBUG(10, ("Sending break request to PID %s\n",
1043 procid_str_static(&exclusive->pid)));
1044 exclusive->op_mid = mid;
1045
1046 /* Create the message. */
1047 share_mode_entry_to_message(msg, exclusive);
1048
1049 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1050 don't want this set in the share mode struct pointed to by lck. */
1051
1052 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1053 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1054 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1055 }
1056
1057 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1058 MSG_SMB_BREAK_REQUEST,
1059 (uint8 *)msg,
1060 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1061 if (!NT_STATUS_IS_OK(status)) {
1062 DEBUG(3, ("Could not send oplock break message: %s\n",
1063 nt_errstr(status)));
1064 }
1065
1066 return status;
1067 }
1068
1069 /*
1070 * Return share_mode_entry pointers for :
1071 * 1). Batch oplock entry.
1072 * 2). Batch or exclusive oplock entry (may be identical to #1).
1073 * bool have_level2_oplock
1074 * bool have_no_oplock.
1075 * Do internal consistency checks on the share mode for a file.
1076 */
1077
1078 static void find_oplock_types(files_struct *fsp,
1079 int oplock_request,
1080 struct share_mode_lock *lck,
1081 struct share_mode_entry **pp_batch,
1082 struct share_mode_entry **pp_ex_or_batch,
1083 bool *got_level2,
1084 bool *got_no_oplock)
1085 {
1086 int i;
1087
1088 *pp_batch = NULL;
1089 *pp_ex_or_batch = NULL;
1090 *got_level2 = false;
1091 *got_no_oplock = false;
1092
1093 /* Ignore stat or internal opens, as is done in
1094 delay_for_batch_oplocks() and
1095 delay_for_exclusive_oplocks().
1096 */
1097 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1098 return;
1099 }
1100
1101 for (i=0; i<lck->num_share_modes; i++) {
1102 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1103 continue;
1104 }
1105
1106 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1107 is_stat_open(lck->share_modes[i].access_mask)) {
1108 /* We ignore stat opens in the table - they
1109 always have NO_OPLOCK and never get or
1110 cause breaks. JRA. */
1111 continue;
1112 }
1113
1114 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1115 /* batch - can only be one. */
1116 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1117 smb_panic("Bad batch oplock entry.");
1118 }
1119 *pp_batch = &lck->share_modes[i];
1120 }
1121
1122 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1123 /* Exclusive or batch - can only be one. */
1124 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1125 smb_panic("Bad exclusive or batch oplock entry.");
1126 }
1127 *pp_ex_or_batch = &lck->share_modes[i];
1128 }
1129
1130 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1131 if (*pp_batch || *pp_ex_or_batch) {
1132 smb_panic("Bad levelII oplock entry.");
1133 }
1134 *got_level2 = true;
1135 }
1136
1137 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1138 if (*pp_batch || *pp_ex_or_batch) {
1139 smb_panic("Bad no oplock entry.");
1140 }
1141 *got_no_oplock = true;
1142 }
1143 }
1144 }
1145
1146 static bool delay_for_batch_oplocks(files_struct *fsp,
1147 uint64_t mid,
1148 int oplock_request,
1149 struct share_mode_entry *batch_entry)
1150 {
1151 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1152 return false;
1153 }
1154
1155 if (batch_entry != NULL) {
1156 /* Found a batch oplock */
1157 send_break_message(fsp, batch_entry, mid, oplock_request);
1158 return true;
1159 }
1160 return false;
1161 }
1162
1163 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1164 uint64_t mid,
1165 int oplock_request,
1166 struct share_mode_entry *ex_entry)
1167 {
1168 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1169 return false;
1170 }
1171
1172 if (ex_entry != NULL) {
1173 /* Found an exclusive or batch oplock */
1174 bool delay_it = is_delete_request(fsp) ?
1175 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1176 if (delay_it) {
1177 send_break_message(fsp, ex_entry, mid, oplock_request);
1178 return true;
1179 }
1180 }
1181 return false;
1182 }
1183
1184 static void grant_fsp_oplock_type(files_struct *fsp,
1185 const struct byte_range_lock *br_lck,
1186 int oplock_request,
1187 bool got_level2_oplock,
1188 bool got_a_none_oplock)
1189 {
1190 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1191 lp_level2_oplocks(SNUM(fsp->conn));
1192
1193 /* Start by granting what the client asked for,
1194 but ensure no SAMBA_PRIVATE bits can be set. */
1195 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1196
1197 if (oplock_request & INTERNAL_OPEN_ONLY) {
1198 /* No oplocks on internal open. */
1199 fsp->oplock_type = NO_OPLOCK;
1200 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1201 fsp->oplock_type, fsp_str_dbg(fsp)));
1202 return;
1203 } else if (br_lck && br_lck->num_locks > 0) {
1204 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1205 fsp_str_dbg(fsp)));
1206 fsp->oplock_type = NO_OPLOCK;
1207 }
1208
1209 if (is_stat_open(fsp->access_mask)) {
1210 /* Leave the value already set. */
1211 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1212 fsp->oplock_type, fsp_str_dbg(fsp)));
1213 return;
1214 }
1215
1216 /*
1217 * Match what was requested (fsp->oplock_type) with
1218 * what was found in the existing share modes.
1219 */
1220
1221 if (got_a_none_oplock) {
1222 fsp->oplock_type = NO_OPLOCK;
1223 } else if (got_level2_oplock) {
1224 if (fsp->oplock_type == NO_OPLOCK ||
1225 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1226 /* Store a level2 oplock, but don't tell the client */
1227 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1228 } else {
1229 fsp->oplock_type = LEVEL_II_OPLOCK;
1230 }
1231 } else {
1232 /* All share_mode_entries are placeholders or deferred.
1233 * Silently upgrade to fake levelII if the client didn't
1234 * ask for an oplock. */
1235 if (fsp->oplock_type == NO_OPLOCK) {
1236 /* Store a level2 oplock, but don't tell the client */
1237 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1238 }
1239 }
1240
1241 /*
1242 * Don't grant level2 to clients that don't want them
1243 * or if we've turned them off.
1244 */
1245 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1246 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1247 }
1248
1249 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1250 fsp->oplock_type, fsp_str_dbg(fsp)));
1251 }
1252
1253 bool request_timed_out(struct timeval request_time,
1254 struct timeval timeout)
1255 {
1256 struct timeval now, end_time;
1257 GetTimeOfDay(&now);
1258 end_time = timeval_sum(&request_time, &timeout);
1259 return (timeval_compare(&end_time, &now) < 0);
1260 }
1261
1262 /****************************************************************************
1263 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1264 ****************************************************************************/
1265
1266 static void defer_open(struct share_mode_lock *lck,
1267 struct timeval request_time,
1268 struct timeval timeout,
1269 struct smb_request *req,
1270 struct deferred_open_record *state)
1271 {
1272 int i;
1273
1274 /* Paranoia check */
1275
1276 for (i=0; i<lck->num_share_modes; i++) {
1277 struct share_mode_entry *e = &lck->share_modes[i];
1278
1279 if (!is_deferred_open_entry(e)) {
1280 continue;
1281 }
1282
1283 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1284 DEBUG(0, ("Trying to defer an already deferred "
1285 "request: mid=%llu, exiting\n",
1286 (unsigned long long)req->mid));
1287 exit_server("attempt to defer a deferred request");
1288 }
1289 }
1290
1291 /* End paranoia check */
1292
1293 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1294 "open entry for mid %llu\n",
1295 (unsigned int)request_time.tv_sec,
1296 (unsigned int)request_time.tv_usec,
1297 (unsigned long long)req->mid));
1298
1299 if (!push_deferred_open_message_smb(req, request_time, timeout,
1300 state->id, (char *)state, sizeof(*state))) {
1301 exit_server("push_deferred_open_message_smb failed");
1302 }
1303 add_deferred_open(lck, req->mid, request_time,
1304 sconn_server_id(req->sconn), state->id);
1305 }
1306
1307
1308 /****************************************************************************
1309 On overwrite open ensure that the attributes match.
1310 ****************************************************************************/
1311
1312 bool open_match_attributes(connection_struct *conn,
1313 uint32 old_dos_attr,
1314 uint32 new_dos_attr,
1315 mode_t existing_unx_mode,
1316 mode_t new_unx_mode,
1317 mode_t *returned_unx_mode)
1318 {
1319 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1320
1321 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1322 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1323
1324 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1325 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1326 *returned_unx_mode = new_unx_mode;
1327 } else {
1328 *returned_unx_mode = (mode_t)0;
1329 }
1330
1331 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1332 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1333 "returned_unx_mode = 0%o\n",
1334 (unsigned int)old_dos_attr,
1335 (unsigned int)existing_unx_mode,
1336 (unsigned int)new_dos_attr,
1337 (unsigned int)*returned_unx_mode ));
1338
1339 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1340 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1341 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1342 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1343 return False;
1344 }
1345 }
1346 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1347 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1348 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1349 return False;
1350 }
1351 }
1352 return True;
1353 }
1354
1355 /****************************************************************************
1356 Special FCB or DOS processing in the case of a sharing violation.
1357 Try and find a duplicated file handle.
1358 ****************************************************************************/
1359
1360 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1361 connection_struct *conn,
1362 files_struct *fsp_to_dup_into,
1363 const struct smb_filename *smb_fname,
1364 struct file_id id,
1365 uint16 file_pid,
1366 uint16 vuid,
1367 uint32 access_mask,
1368 uint32 share_access,
1369 uint32 create_options)
1370 {
1371 files_struct *fsp;
1372
1373 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1374 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1375
1376 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1377 fsp = file_find_di_next(fsp)) {
1378
1379 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1380 "vuid = %u, file_pid = %u, private_options = 0x%x "
1381 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1382 fsp->fh->fd, (unsigned int)fsp->vuid,
1383 (unsigned int)fsp->file_pid,
1384 (unsigned int)fsp->fh->private_options,
1385 (unsigned int)fsp->access_mask ));
1386
1387 if (fsp->fh->fd != -1 &&
1388 fsp->vuid == vuid &&
1389 fsp->file_pid == file_pid &&
1390 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1391 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1392 (fsp->access_mask & FILE_WRITE_DATA) &&
1393 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1394 strequal(fsp->fsp_name->stream_name,
1395 smb_fname->stream_name)) {
1396 DEBUG(10,("fcb_or_dos_open: file match\n"));
1397 break;
1398 }
1399 }
1400
1401 if (!fsp) {
1402 return NT_STATUS_NOT_FOUND;
1403 }
1404
1405 /* quite an insane set of semantics ... */
1406 if (is_executable(smb_fname->base_name) &&
1407 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1408 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1409 return NT_STATUS_INVALID_PARAMETER;
1410 }
1411
1412 /* We need to duplicate this fsp. */
1413 return dup_file_fsp(req, fsp, access_mask, share_access,
1414 create_options, fsp_to_dup_into);
1415 }
1416
1417 static void schedule_defer_open(struct share_mode_lock *lck,
1418 struct timeval request_time,
1419 struct smb_request *req)
1420 {
1421 struct deferred_open_record state;
1422
1423 /* This is a relative time, added to the absolute
1424 request_time value to get the absolute timeout time.
1425 Note that if this is the second or greater time we enter
1426 this codepath for this particular request mid then
1427 request_time is left as the absolute time of the *first*
1428 time this request mid was processed. This is what allows
1429 the request to eventually time out. */
1430
1431 struct timeval timeout;
1432
1433 /* Normally the smbd we asked should respond within
1434 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1435 * the client did, give twice the timeout as a safety
1436 * measure here in case the other smbd is stuck
1437 * somewhere else. */
1438
1439 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1440
1441 /* Nothing actually uses state.delayed_for_oplocks
1442 but it's handy to differentiate in debug messages
1443 between a 30 second delay due to oplock break, and
1444 a 1 second delay for share mode conflicts. */
1445
1446 state.delayed_for_oplocks = True;
1447 state.id = lck->id;
1448
1449 if (!request_timed_out(request_time, timeout)) {
1450 defer_open(lck, request_time, timeout, req, &state);
1451 }
1452 }
1453
1454 /****************************************************************************
1455 Work out what access_mask to use from what the client sent us.
1456 ****************************************************************************/
1457
1458 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1459 const struct smb_filename *smb_fname,
1460 bool file_existed,
1461 uint32_t access_mask,
1462 uint32_t *access_mask_out)
1463 {
1464 NTSTATUS status;
1465 uint32_t orig_access_mask = access_mask;
1466 uint32_t rejected_share_access;
1467
1468 /*
1469 * Convert GENERIC bits to specific bits.
1470 */
1471
1472 se_map_generic(&access_mask, &file_generic_mapping);
1473
1474 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1475 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1476 if (get_current_uid(conn) == (uid_t)0) {
1477 access_mask |= FILE_GENERIC_ALL;
1478 } else if (file_existed) {
1479
1480 struct security_descriptor *sd;
1481 uint32_t access_granted = 0;
1482
1483 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1484 (SECINFO_OWNER |
1485 SECINFO_GROUP |
1486 SECINFO_DACL),&sd);
1487
1488 if (!NT_STATUS_IS_OK(status)) {
1489 DEBUG(10,("smbd_calculate_access_mask: "
1490 "Could not get acl on file %s: %s\n",
1491 smb_fname_str_dbg(smb_fname),
1492 nt_errstr(status)));
1493 return NT_STATUS_ACCESS_DENIED;
1494 }
1495
1496 /*
1497 * Never test FILE_READ_ATTRIBUTES. se_access_check()
1498 * also takes care of owner WRITE_DAC and READ_CONTROL.
1499 */
1500 status = se_access_check(sd,
1501 get_current_nttok(conn),
1502 (access_mask & ~FILE_READ_ATTRIBUTES),
1503 &access_granted);
1504
1505 TALLOC_FREE(sd);
1506
1507 if (!NT_STATUS_IS_OK(status)) {
1508 DEBUG(10, ("smbd_calculate_access_mask: "
1509 "Access denied on file %s: "
1510 "when calculating maximum access\n",
1511 smb_fname_str_dbg(smb_fname)));
1512 return NT_STATUS_ACCESS_DENIED;
1513 }
1514
1515 access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1516 } else {
1517 access_mask = FILE_GENERIC_ALL;
1518 }
1519
1520 access_mask &= conn->share_access;
1521 }
1522
1523 rejected_share_access = access_mask & ~(conn->share_access);
1524
1525 if (rejected_share_access) {
1526 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1527 "file %s: rejected by share access mask[0x%08X] "
1528 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1529 smb_fname_str_dbg(smb_fname),
1530 conn->share_access,
1531 orig_access_mask, access_mask,
1532 rejected_share_access));
1533 return NT_STATUS_ACCESS_DENIED;
1534 }
1535
1536 *access_mask_out = access_mask;
1537 return NT_STATUS_OK;
1538 }
1539
1540 /****************************************************************************
1541 Remove the deferred open entry under lock.
1542 ****************************************************************************/
1543
1544 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1545 struct server_id pid)
1546 {
1547 struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1548 NULL, NULL, NULL);
1549 if (lck == NULL) {
1550 DEBUG(0, ("could not get share mode lock\n"));
1551 return;
1552 }
1553 del_deferred_open_entry(lck, mid, pid);
1554 TALLOC_FREE(lck);
1555 }
1556
1557 /****************************************************************
1558 Ensure we get the brlock lock followed by the share mode lock
1559 in the correct order to prevent deadlocks if other smbd's are
1560 using the brlock database on this file simultaneously with this open
1561 (that code also gets the locks in brlock -> share mode lock order).
1562 ****************************************************************/
1563
1564 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1565 files_struct *fsp,
1566 const struct file_id id,
1567 const char *connectpath,
1568 const struct smb_filename *smb_fname,
1569 const struct timespec *p_old_write_time,
1570 struct share_mode_lock **p_lck,
1571 struct byte_range_lock **p_br_lck)
1572 {
1573 /* Ordering - we must get the br_lck for this
1574 file before the share mode. */
1575 if (lp_locking(fsp->conn->params)) {
1576 *p_br_lck = brl_get_locks_readonly(fsp);
1577 if (*p_br_lck == NULL) {
1578 DEBUG(0, ("Could not get br_lock\n"));
1579 return false;
1580 }
1581 /* Note - we don't need to free the returned
1582 br_lck explicitly as it was allocated on talloc_tos()
1583 and so will be autofreed (and release the lock)
1584 once the frame context disappears.
1585
1586 If it was set to fsp->brlock_rec then it was
1587 talloc_move'd to hang off the fsp pointer and
1588 in this case is guarenteed to not be holding the
1589 lock on the brlock database. */
1590 }
1591
1592 *p_lck = get_share_mode_lock(mem_ctx,
1593 id,
1594 connectpath,
1595 smb_fname,
1596 p_old_write_time);
1597
1598 if (*p_lck == NULL) {
1599 DEBUG(0, ("Could not get share mode lock\n"));
1600 TALLOC_FREE(*p_br_lck);
1601 return false;
1602 }
1603 return true;
1604 }
1605
1606 /****************************************************************************
1607 Open a file with a share mode. Passed in an already created files_struct *.
1608 ****************************************************************************/
1609
1610 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1611 struct smb_request *req,
1612 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1613 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1614 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1615 uint32 create_options, /* options such as delete on close. */
1616 uint32 new_dos_attributes, /* attributes used for new file. */
1617 int oplock_request, /* internal Samba oplock codes. */
1618 /* Information (FILE_EXISTS etc.) */
1619 uint32_t private_flags, /* Samba specific flags. */
1620 int *pinfo,
1621 files_struct *fsp)
1622 {
1623 struct smb_filename *smb_fname = fsp->fsp_name;
1624 int flags=0;
1625 int flags2=0;
1626 bool file_existed = VALID_STAT(smb_fname->st);
1627 bool def_acl = False;
1628 bool posix_open = False;
1629 bool new_file_created = False;
1630 bool clear_ads = false;
1631 struct file_id id;
1632 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1633 mode_t new_unx_mode = (mode_t)0;
1634 mode_t unx_mode = (mode_t)0;
1635 int info;
1636 uint32 existing_dos_attributes = 0;
1637 struct timeval request_time = timeval_zero();
1638 struct share_mode_lock *lck = NULL;
1639 uint32 open_access_mask = access_mask;
1640 NTSTATUS status;
1641 char *parent_dir;
1642
1643 ZERO_STRUCT(id);
1644
1645 if (conn->printer) {
1646 /*
1647 * Printers are handled completely differently.
1648 * Most of the passed parameters are ignored.
1649 */
1650
1651 if (pinfo) {
1652 *pinfo = FILE_WAS_CREATED;
1653 }
1654
1655 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1656 smb_fname_str_dbg(smb_fname)));
1657
1658 if (!req) {
1659 DEBUG(0,("open_file_ntcreate: printer open without "
1660 "an SMB request!\n"));
1661 return NT_STATUS_INTERNAL_ERROR;
1662 }
1663
1664 return print_spool_open(fsp, smb_fname->base_name,
1665 req->vuid);
1666 }
1667
1668 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1669 NULL)) {
1670 return NT_STATUS_NO_MEMORY;
1671 }
1672
1673 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1674 posix_open = True;
1675 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1676 new_dos_attributes = 0;
1677 } else {
1678 /* Windows allows a new file to be created and
1679 silently removes a FILE_ATTRIBUTE_DIRECTORY
1680 sent by the client. Do the same. */
1681
1682 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1683
1684 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1685 * created new. */
1686 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1687 smb_fname, parent_dir);
1688 }
1689
1690 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1691 "access_mask=0x%x share_access=0x%x "
1692 "create_disposition = 0x%x create_options=0x%x "
1693 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1694 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1695 access_mask, share_access, create_disposition,
1696 create_options, (unsigned int)unx_mode, oplock_request,
1697 (unsigned int)private_flags));
1698
1699 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1700 DEBUG(0, ("No smb request but not an internal only open!\n"));
1701 return NT_STATUS_INTERNAL_ERROR;
1702 }
1703
1704 /*
1705 * Only non-internal opens can be deferred at all
1706 */
1707
1708 if (req) {
1709 void *ptr;
1710 if (get_deferred_open_message_state(req,
1711 &request_time,
1712 &ptr)) {
1713
1714 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1715 /* Remember the absolute time of the original
1716 request with this mid. We'll use it later to
1717 see if this has timed out. */
1718
1719 /* Remove the deferred open entry under lock. */
1720 remove_deferred_open_entry(
1721 state->id, req->mid,
1722 sconn_server_id(req->sconn));
1723
1724 /* Ensure we don't reprocess this message. */
1725 remove_deferred_open_message_smb(req->sconn, req->mid);
1726 }
1727 }
1728
1729 status = check_name(conn, smb_fname->base_name);
1730 if (!NT_STATUS_IS_OK(status)) {
1731 return status;
1732 }
1733
1734 if (!posix_open) {
1735 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1736 if (file_existed) {
1737 existing_dos_attributes = dos_mode(conn, smb_fname);
1738 }
1739 }
1740
1741 /* ignore any oplock requests if oplocks are disabled */
1742 if (!lp_oplocks(SNUM(conn)) ||
1743 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1744 /* Mask off everything except the private Samba bits. */
1745 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1746 }
1747
1748 /* this is for OS/2 long file names - say we don't support them */
1749 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1750 /* OS/2 Workplace shell fix may be main code stream in a later
1751 * release. */
1752 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1753 "supported.\n"));
1754 if (use_nt_status()) {
1755 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1756 }
1757 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1758 }
1759
1760 switch( create_disposition ) {
1761 /*
1762 * Currently we're using FILE_SUPERSEDE as the same as
1763 * FILE_OVERWRITE_IF but they really are
1764 * different. FILE_SUPERSEDE deletes an existing file
1765 * (requiring delete access) then recreates it.
1766 */
1767 case FILE_SUPERSEDE:
1768 /* If file exists replace/overwrite. If file doesn't
1769 * exist create. */
1770 flags2 |= (O_CREAT | O_TRUNC);
1771 clear_ads = true;
1772 break;
1773
1774 case FILE_OVERWRITE_IF:
1775 /* If file exists replace/overwrite. If file doesn't
1776 * exist create. */
1777 flags2 |= (O_CREAT | O_TRUNC);
1778 clear_ads = true;
1779 break;
1780
1781 case FILE_OPEN:
1782 /* If file exists open. If file doesn't exist error. */
1783 if (!file_existed) {
1784 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1785 "requested for file %s and file "
1786 "doesn't exist.\n",
1787 smb_fname_str_dbg(smb_fname)));
1788 errno = ENOENT;
1789 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1790 }
1791 break;
1792
1793 case FILE_OVERWRITE:
1794 /* If file exists overwrite. If file doesn't exist
1795 * error. */
1796 if (!file_existed) {
1797 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1798 "requested for file %s and file "
1799 "doesn't exist.\n",
1800 smb_fname_str_dbg(smb_fname) ));
1801 errno = ENOENT;
1802 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1803 }
1804 flags2 |= O_TRUNC;
1805 clear_ads = true;
1806 break;
1807
1808 case FILE_CREATE:
1809 /* If file exists error. If file doesn't exist
1810 * create. */
1811 if (file_existed) {
1812 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1813 "requested for file %s and file "
1814 "already exists.\n",
1815 smb_fname_str_dbg(smb_fname)));
1816 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1817 errno = EISDIR;
1818 } else {
1819 errno = EEXIST;
1820 }
1821 return map_nt_error_from_unix(errno);
1822 }
1823 flags2 |= (O_CREAT|O_EXCL);
1824 break;
1825
1826 case FILE_OPEN_IF:
1827 /* If file exists open. If file doesn't exist
1828 * create. */
1829 flags2 |= O_CREAT;
1830 break;
1831
1832 default:
1833 return NT_STATUS_INVALID_PARAMETER;
1834 }
1835
1836 /* We only care about matching attributes on file exists and
1837 * overwrite. */
1838
1839 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1840 (create_disposition == FILE_OVERWRITE_IF))) {
1841 if (!open_match_attributes(conn, existing_dos_attributes,
1842 new_dos_attributes,
1843 smb_fname->st.st_ex_mode,
1844 unx_mode, &new_unx_mode)) {
1845 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1846 "for file %s (%x %x) (0%o, 0%o)\n",
1847 smb_fname_str_dbg(smb_fname),
1848 existing_dos_attributes,
1849 new_dos_attributes,
1850 (unsigned int)smb_fname->st.st_ex_mode,
1851 (unsigned int)unx_mode ));
1852 errno = EACCES;
1853 return NT_STATUS_ACCESS_DENIED;
1854 }
1855 }
1856
1857 status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1858 access_mask,
1859 &access_mask);
1860 if (!NT_STATUS_IS_OK(status)) {
1861 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1862 "on file %s returned %s\n",
1863 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1864 return status;
1865 }
1866
1867 open_access_mask = access_mask;
1868
1869 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1870 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1871 }
1872
1873 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1874 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1875 access_mask));
1876
1877 /*
1878 * Note that we ignore the append flag as append does not
1879 * mean the same thing under DOS and Unix.
1880 */
1881
1882 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1883 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1884 /* DENY_DOS opens are always underlying read-write on the
1885 file handle, no matter what the requested access mask
1886 says. */
1887 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1888 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1889 flags = O_RDWR;
1890 } else {
1891 flags = O_WRONLY;
1892 }
1893 } else {
1894 flags = O_RDONLY;
1895 }
1896
1897 /*
1898 * Currently we only look at FILE_WRITE_THROUGH for create options.
1899 */
1900
1901 #if defined(O_SYNC)
1902 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1903 flags2 |= O_SYNC;
1904 }
1905 #endif /* O_SYNC */
1906
1907 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1908 flags2 |= O_APPEND;
1909 }
1910
1911 if (!posix_open && !CAN_WRITE(conn)) {
1912 /*
1913 * We should really return a permission denied error if either
1914 * O_CREAT or O_TRUNC are set, but for compatibility with
1915 * older versions of Samba we just AND them out.
1916 */
1917 flags2 &= ~(O_CREAT|O_TRUNC);
1918 }
1919
1920 /*
1921 * Ensure we can't write on a read-only share or file.
1922 */
1923
1924 if (flags != O_RDONLY && file_existed &&
1925 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1926 DEBUG(5,("open_file_ntcreate: write access requested for "
1927 "file %s on read only %s\n",
1928 smb_fname_str_dbg(smb_fname),
1929 !CAN_WRITE(conn) ? "share" : "file" ));
1930 errno = EACCES;
1931 return NT_STATUS_ACCESS_DENIED;
1932 }
1933
1934 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1935 fsp->share_access = share_access;
1936 fsp->fh->private_options = private_flags;
1937 fsp->access_mask = open_access_mask; /* We change this to the
1938 * requested access_mask after
1939 * the open is done. */
1940 fsp->posix_open = posix_open;
1941
1942 /* Ensure no SAMBA_PRIVATE bits can be set. */
1943 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1944
1945 if (timeval_is_zero(&request_time)) {
1946 request_time = fsp->open_time;
1947 }
1948
1949 if (file_existed) {
1950 struct byte_range_lock *br_lck = NULL;
1951 struct share_mode_entry *batch_entry = NULL;
1952 struct share_mode_entry *exclusive_entry = NULL;
1953 bool got_level2_oplock = false;
1954 bool got_a_none_oplock = false;
1955
1956 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1957 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1958
1959 if (!acquire_ordered_locks(talloc_tos(),
1960 fsp,
1961 id,
1962 conn->connectpath,
1963 smb_fname,
1964 &old_write_time,
1965 &lck,
1966 &br_lck)) {
1967 return NT_STATUS_SHARING_VIOLATION;
1968 }
1969
1970 /* Get the types we need to examine. */
1971 find_oplock_types(fsp,
1972 oplock_request,
1973 lck,
1974 &batch_entry,
1975 &exclusive_entry,
1976 &got_level2_oplock,
1977 &got_a_none_oplock);
1978
1979 /* First pass - send break only on batch oplocks. */
1980 if ((req != NULL) &&
1981 delay_for_batch_oplocks(fsp,
1982 req->mid,
1983 oplock_request,
1984 batch_entry)) {
1985 schedule_defer_open(lck, request_time, req);
1986 TALLOC_FREE(lck);
1987 return NT_STATUS_SHARING_VIOLATION;
1988 }
1989
1990 /* Use the client requested access mask here, not the one we
1991 * open with. */
1992 status = open_mode_check(conn, lck, fsp->name_hash,
1993 access_mask, share_access,
1994 create_options, &file_existed);
1995
1996 if (NT_STATUS_IS_OK(status)) {
1997 /* We might be going to allow this open. Check oplock
1998 * status again. */
1999 /* Second pass - send break for both batch or
2000 * exclusive oplocks. */
2001 if ((req != NULL) &&
2002 delay_for_exclusive_oplocks(
2003 fsp,
2004 req->mid,
2005 oplock_request,
2006 exclusive_entry)) {
2007 schedule_defer_open(lck, request_time, req);
2008 TALLOC_FREE(lck);
2009 return NT_STATUS_SHARING_VIOLATION;
2010 }
2011 }
2012
2013 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2014 /* DELETE_PENDING is not deferred for a second */
2015 TALLOC_FREE(lck);
2016 return status;
2017 }
2018
2019 grant_fsp_oplock_type(fsp,
2020 br_lck,
2021 oplock_request,
2022 got_level2_oplock,
2023 got_a_none_oplock);
2024
2025 if (!NT_STATUS_IS_OK(status)) {
2026 uint32 can_access_mask;
2027 bool can_access = True;
2028
2029 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2030
2031 /* Check if this can be done with the deny_dos and fcb
2032 * calls. */
2033 if (private_flags &
2034 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2035 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2036 if (req == NULL) {
2037 DEBUG(0, ("DOS open without an SMB "
2038 "request!\n"));
2039 TALLOC_FREE(lck);
2040 return NT_STATUS_INTERNAL_ERROR;
2041 }
2042
2043 /* Use the client requested access mask here,
2044 * not the one we open with. */
2045 status = fcb_or_dos_open(req,
2046 conn,
2047 fsp,
2048 smb_fname,
2049 id,
2050 req->smbpid,
2051 req->vuid,
2052 access_mask,
2053 share_access,
2054 create_options);
2055
2056 if (NT_STATUS_IS_OK(status)) {
2057 TALLOC_FREE(lck);
2058 if (pinfo) {
2059 *pinfo = FILE_WAS_OPENED;
2060 }
2061 return NT_STATUS_OK;
2062 }
2063 }
2064
2065 /*
2066 * This next line is a subtlety we need for
2067 * MS-Access. If a file open will fail due to share
2068 * permissions and also for security (access) reasons,
2069 * we need to return the access failed error, not the
2070 * share error. We can't open the file due to kernel
2071 * oplock deadlock (it's possible we failed above on
2072 * the open_mode_check()) so use a userspace check.
2073 */
2074
2075 if (flags & O_RDWR) {
2076 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2077 } else if (flags & O_WRONLY) {
2078 can_access_mask = FILE_WRITE_DATA;
2079 } else {
2080 can_access_mask = FILE_READ_DATA;
2081 }
2082
2083 if (((can_access_mask & FILE_WRITE_DATA) &&
2084 !CAN_WRITE(conn)) ||
2085 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2086 smb_fname, can_access_mask))) {
2087 can_access = False;
2088 }
2089
2090 /*
2091 * If we're returning a share violation, ensure we
2092 * cope with the braindead 1 second delay.
2093 */
2094
2095 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2096 lp_defer_sharing_violations()) {
2097 struct timeval timeout;
2098 struct deferred_open_record state;
2099 int timeout_usecs;
2100
2101 /* this is a hack to speed up torture tests
2102 in 'make test' */
2103 timeout_usecs = lp_parm_int(SNUM(conn),
2104 "smbd","sharedelay",
2105 SHARING_VIOLATION_USEC_WAIT);
2106
2107 /* This is a relative time, added to the absolute
2108 request_time value to get the absolute timeout time.
2109 Note that if this is the second or greater time we enter
2110 this codepath for this particular request mid then
2111 request_time is left as the absolute time of the *first*
2112 time this request mid was processed. This is what allows
2113 the request to eventually time out. */
2114
2115 timeout = timeval_set(0, timeout_usecs);
2116
2117 /* Nothing actually uses state.delayed_for_oplocks
2118 but it's handy to differentiate in debug messages
2119 between a 30 second delay due to oplock break, and
2120 a 1 second delay for share mode conflicts. */
2121
2122 state.delayed_for_oplocks = False;
2123 state.id = id;
2124
2125 if ((req != NULL)
2126 && !request_timed_out(request_time,
2127 timeout)) {
2128 defer_open(lck, request_time, timeout,
2129 req, &state);
2130 }
2131 }
2132
2133 TALLOC_FREE(lck);
2134 if (can_access) {
2135 /*
2136 * We have detected a sharing violation here
2137 * so return the correct error code
2138 */
2139 status = NT_STATUS_SHARING_VIOLATION;
2140 } else {
2141 status = NT_STATUS_ACCESS_DENIED;
2142 }
2143 return status;
2144 }
2145
2146 /*
2147 * We exit this block with the share entry *locked*.....
2148 */
2149 }
2150
2151 SMB_ASSERT(!file_existed || (lck != NULL));
2152
2153 /*
2154 * Ensure we pay attention to default ACLs on directories if required.
2155 */
2156
2157 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2158 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2159 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2160 }
2161
2162 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2163 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2164 (unsigned int)flags, (unsigned int)flags2,
2165 (unsigned int)unx_mode, (unsigned int)access_mask,
2166 (unsigned int)open_access_mask));
2167
2168 /*
2169 * open_file strips any O_TRUNC flags itself.
2170 */
2171
2172 fsp_open = open_file(fsp, conn, req, parent_dir,
2173 flags|flags2, unx_mode, access_mask,
2174 open_access_mask);
2175
2176 if (!NT_STATUS_IS_OK(fsp_open)) {
2177 TALLOC_FREE(lck);
2178 return fsp_open;
2179 }
2180
2181 if (!file_existed) {
2182 struct byte_range_lock *br_lck = NULL;
2183 struct share_mode_entry *batch_entry = NULL;
2184 struct share_mode_entry *exclusive_entry = NULL;
2185 bool got_level2_oplock = false;
2186 bool got_a_none_oplock = false;
2187 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2188 /*
2189 * Deal with the race condition where two smbd's detect the
2190 * file doesn't exist and do the create at the same time. One
2191 * of them will win and set a share mode, the other (ie. this
2192 * one) should check if the requested share mode for this
2193 * create is allowed.
2194 */
2195
2196 /*
2197 * Now the file exists and fsp is successfully opened,
2198 * fsp->dev and fsp->inode are valid and should replace the
2199 * dev=0,inode=0 from a non existent file. Spotted by
2200 * Nadav Danieli <nadavd@exanet.com>. JRA.
2201 */
2202
2203 id = fsp->file_id;
2204
2205 if (!acquire_ordered_locks(talloc_tos(),
2206 fsp,
2207 id,
2208 conn->connectpath,
2209 smb_fname,
2210 &old_write_time,
2211 &lck,
2212 &br_lck)) {
2213 return NT_STATUS_SHARING_VIOLATION;
2214 }
2215
2216 /* Get the types we need to examine. */
2217 find_oplock_types(fsp,
2218 oplock_request,
2219 lck,
2220 &batch_entry,
2221 &exclusive_entry,
2222 &got_level2_oplock,
2223 &got_a_none_oplock);
2224
2225 /* First pass - send break only on batch oplocks. */
2226 if ((req != NULL) &&
2227 delay_for_batch_oplocks(fsp,
2228 req->mid,
2229 oplock_request,
2230 batch_entry)) {
2231 schedule_defer_open(lck, request_time, req);
2232 TALLOC_FREE(lck);
2233 fd_close(fsp);
2234 return NT_STATUS_SHARING_VIOLATION;
2235 }
2236
2237 status = open_mode_check(conn, lck, fsp->name_hash,
2238 access_mask, share_access,
2239 create_options, &file_existed);
2240
2241 if (NT_STATUS_IS_OK(status)) {
2242 /* We might be going to allow this open. Check oplock
2243 * status again. */
2244 /* Second pass - send break for both batch or
2245 * exclusive oplocks. */
2246 if ((req != NULL) &&
2247 delay_for_exclusive_oplocks(
2248 fsp,
2249 req->mid,
2250 oplock_request,
2251 exclusive_entry)) {
2252 schedule_defer_open(lck, request_time, req);
2253 TALLOC_FREE(lck);
2254 fd_close(fsp);
2255 return NT_STATUS_SHARING_VIOLATION;
2256 }
2257 }
2258
2259 if (!NT_STATUS_IS_OK(status)) {
2260 struct deferred_open_record state;
2261
2262 state.delayed_for_oplocks = False;
2263 state.id = id;
2264
2265 /* Do it all over again immediately. In the second
2266 * round we will find that the file existed and handle
2267 * the DELETE_PENDING and FCB cases correctly. No need
2268 * to duplicate the code here. Essentially this is a
2269 * "goto top of this function", but don't tell
2270 * anybody... */
2271
2272 if (req != NULL) {
2273 defer_open(lck, request_time, timeval_zero(),
2274 req, &state);
2275 }
2276 TALLOC_FREE(lck);
2277 fd_close(fsp);
2278 return status;
2279 }
2280
2281 grant_fsp_oplock_type(fsp,
2282 br_lck,
2283 oplock_request,
2284 got_level2_oplock,
2285 got_a_none_oplock);
2286
2287 /*
2288 * We exit this block with the share entry *locked*.....
2289 */
2290
2291 }
2292
2293 SMB_ASSERT(lck != NULL);
2294
2295 /* Delete streams if create_disposition requires it */
2296 if (file_existed && clear_ads &&
2297 !is_ntfs_stream_smb_fname(smb_fname)) {
2298 status = delete_all_streams(conn, smb_fname->base_name);
2299 if (!NT_STATUS_IS_OK(status)) {
2300 TALLOC_FREE(lck);
2301 fd_close(fsp);
2302 return status;
2303 }
2304 }
2305
2306 /* note that we ignore failure for the following. It is
2307 basically a hack for NFS, and NFS will never set one of
2308 these only read them. Nobody but Samba can ever set a deny
2309 mode and we have already checked our more authoritative
2310 locking database for permission to set this deny mode. If
2311 the kernel refuses the operations then the kernel is wrong.
2312 note that GPFS supports it as well - jmcd */
2313
2314 if (fsp->fh->fd != -1) {
2315 int ret_flock;
2316 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2317 if(ret_flock == -1 ){
2318
2319 TALLOC_FREE(lck);
2320 fd_close(fsp);
2321
2322 return NT_STATUS_SHARING_VIOLATION;
2323 }
2324 }
2325
2326 /*
2327 * At this point onwards, we can guarentee that the share entry
2328 * is locked, whether we created the file or not, and that the
2329 * deny mode is compatible with all current opens.
2330 */
2331
2332 /*
2333 * If requested, truncate the file.
2334 */
2335
2336 if (file_existed && (flags2&O_TRUNC)) {
2337 /*
2338 * We are modifing the file after open - update the stat
2339 * struct..
2340 */
2341 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2342 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2343 status = map_nt_error_from_unix(errno);
2344 TALLOC_FREE(lck);
2345 fd_close(fsp);
2346 return status;
2347 }
2348 }
2349
2350 /*
2351 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2352 * but we don't have to store this - just ignore it on access check.
2353 */
2354 if (conn->sconn->using_smb2) {
2355 /*
2356 * SMB2 doesn't return it (according to Microsoft tests).
2357 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2358 * File created with access = 0x7 (Read, Write, Delete)
2359 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2360 */
2361 fsp->access_mask = access_mask;
2362 } else {
2363 /* But SMB1 does. */
2364 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2365 }
2366
2367 if (file_existed) {
2368 /* stat opens on existing files don't get oplocks. */
2369 if (is_stat_open(open_access_mask)) {
2370 fsp->oplock_type = NO_OPLOCK;
2371 }
2372
2373 if (!(flags2 & O_TRUNC)) {
2374 info = FILE_WAS_OPENED;
2375 } else {
2376 info = FILE_WAS_OVERWRITTEN;
2377 }
2378 } else {
2379 info = FILE_WAS_CREATED;
2380 }
2381
2382 if (pinfo) {
2383 *pinfo = info;
2384 }
2385
2386 /*
2387 * Setup the oplock info in both the shared memory and
2388 * file structs.
2389 */
2390
2391 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2392 /*
2393 * Could not get the kernel oplock or there are byte-range
2394 * locks on the file.
2395 */
2396 fsp->oplock_type = NO_OPLOCK;
2397 }
2398
2399 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2400 new_file_created = True;
2401 }
2402
2403 set_share_mode(lck, fsp, get_current_uid(conn),
2404 req ? req->mid : 0,
2405 fsp->oplock_type);
2406
2407 /* Handle strange delete on close create semantics. */
2408 if (create_options & FILE_DELETE_ON_CLOSE) {
2409
2410 status = can_set_delete_on_close(fsp, new_dos_attributes);
2411
2412 if (!NT_STATUS_IS_OK(status)) {
2413 /* Remember to delete the mode we just added. */
2414 del_share_mode(lck, fsp);
2415 TALLOC_FREE(lck);
2416 fd_close(fsp);
2417 return status;
2418 }
2419 /* Note that here we set the *inital* delete on close flag,
2420 not the regular one. The magic gets handled in close. */
2421 fsp->initial_delete_on_close = True;
2422 }
2423
2424 if (new_file_created) {
2425 /* Files should be initially set as archive */
2426 if (lp_map_archive(SNUM(conn)) ||
2427 lp_store_dos_attributes(SNUM(conn))) {
2428 if (!posix_open) {
2429 if (file_set_dosmode(conn, smb_fname,
2430 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2431 parent_dir, true) == 0) {
2432 unx_mode = smb_fname->st.st_ex_mode;
2433 }
2434 }
2435 }
2436 }
2437
2438 /* Determine sparse flag. */
2439 if (posix_open) {
2440 /* POSIX opens are sparse by default. */
2441 fsp->is_sparse = true;
2442 } else {
2443 fsp->is_sparse = (file_existed &&
2444 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2445 }
2446
2447 /*
2448 * Take care of inherited ACLs on created files - if default ACL not
2449 * selected.
2450 */
2451
2452 if (!posix_open && !file_existed && !def_acl) {
2453
2454 int saved_errno = errno; /* We might get ENOSYS in the next
2455 * call.. */
2456
2457 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2458 errno == ENOSYS) {
2459 errno = saved_errno; /* Ignore ENOSYS */
2460 }
2461
2462 } else if (new_unx_mode) {
2463
2464 int ret = -1;
2465
2466 /* Attributes need changing. File already existed. */
2467
2468 {
2469 int saved_errno = errno; /* We might get ENOSYS in the
2470 * next call.. */
2471 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2472
2473 if (ret == -1 && errno == ENOSYS) {
2474 errno = saved_errno; /* Ignore ENOSYS */
2475 } else {
2476 DEBUG(5, ("open_file_ntcreate: reset "
2477 "attributes of file %s to 0%o\n",
2478 smb_fname_str_dbg(smb_fname),
2479 (unsigned int)new_unx_mode));
2480 ret = 0; /* Don't do the fchmod below. */
2481 }
2482 }
2483
2484 if ((ret == -1) &&
2485 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2486 DEBUG(5, ("open_file_ntcreate: failed to reset "
2487 "attributes of file %s to 0%o\n",
2488 smb_fname_str_dbg(smb_fname),
2489 (unsigned int)new_unx_mode));
2490 }
2491
2492 /* If this is a successful open, we must remove any deferred open
2493 * records. */
2494 if (req != NULL) {
2495 del_deferred_open_entry(lck, req->mid,
2496 sconn_server_id(req->sconn));
2497 }
2498 TALLOC_FREE(lck);
2499
2500 return NT_STATUS_OK;
2501 }
2502
2503
2504 /****************************************************************************
2505 Open a file for for write to ensure that we can fchmod it.
2506 ****************************************************************************/
2507
2508 NTSTATUS open_file_fchmod(connection_struct *conn,
2509 struct smb_filename *smb_fname,
2510 files_struct **result)
2511 {
2512 if (!VALID_STAT(smb_fname->st)) {
2513 return NT_STATUS_INVALID_PARAMETER;
2514 }
2515
2516 return SMB_VFS_CREATE_FILE(
2517 conn, /* conn */
2518 NULL, /* req */
2519 0, /* root_dir_fid */
2520 smb_fname, /* fname */
2521 FILE_WRITE_DATA, /* access_mask */
2522 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2523 FILE_SHARE_DELETE),
2524 FILE_OPEN, /* create_disposition*/
2525 0, /* create_options */
2526 0, /* file_attributes */
2527 INTERNAL_OPEN_ONLY, /* oplock_request */
2528 0, /* allocation_size */
2529 0, /* private_flags */
2530 NULL, /* sd */
2531 NULL, /* ea_list */
2532 result, /* result */
2533 NULL); /* pinfo */
2534 }
2535
2536 static NTSTATUS mkdir_internal(connection_struct *conn,
2537 struct smb_filename *smb_dname,
2538 uint32 file_attributes)
2539 {
2540 mode_t mode;
2541 char *parent_dir = NULL;
2542 NTSTATUS status;
2543 bool posix_open = false;
2544 bool need_re_stat = false;
2545 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2546
2547 if(access_mask & ~(conn->share_access)) {
2548 DEBUG(5,("mkdir_internal: failing share access "
2549 "%s\n", lp_servicename(SNUM(conn))));
2550 return NT_STATUS_ACCESS_DENIED;
2551 }
2552
2553 status = check_name(conn, smb_dname->base_name);
2554 if (!NT_STATUS_IS_OK(status)) {
2555 return status;
2556 }
2557
2558 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2559 NULL)) {
2560 return NT_STATUS_NO_MEMORY;
2561 }
2562
2563 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2564 posix_open = true;
2565 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2566 } else {
2567 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2568 }
2569
2570 status = check_parent_access(conn,
2571 smb_dname,
2572 access_mask,
2573 &parent_dir);
2574 if(!NT_STATUS_IS_OK(status)) {
2575 DEBUG(5,("mkdir_internal: check_parent_access "
2576 "on directory %s for path %s returned %s\n",
2577 parent_dir,
2578 smb_dname->base_name,
2579 nt_errstr(status) ));
2580 return status;
2581 }
2582
2583 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2584 return map_nt_error_from_unix(errno);
2585 }
2586
2587 /* Ensure we're checking for a symlink here.... */
2588 /* We don't want to get caught by a symlink racer. */
2589
2590 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2591 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2592 smb_fname_str_dbg(smb_dname), strerror(errno)));
2593 return map_nt_error_from_unix(errno);
2594 }
2595
2596 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2597 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2598 smb_fname_str_dbg(smb_dname)));
2599 return NT_STATUS_NOT_A_DIRECTORY;
2600 }
2601
2602 if (lp_store_dos_attributes(SNUM(conn))) {
2603 if (!posix_open) {
2604 file_set_dosmode(conn, smb_dname,
2605 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2606 parent_dir, true);
2607 }
2608 }
2609
2610 if (lp_inherit_perms(SNUM(conn))) {
2611 inherit_access_posix_acl(conn, parent_dir,
2612 smb_dname->base_name, mode);
2613 need_re_stat = true;
2614 }
2615
2616 if (!posix_open) {
2617 /*
2618 * Check if high bits should have been set,
2619 * then (if bits are missing): add them.
2620 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2621 * dir.
2622 */
2623 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2624 (mode & ~smb_dname->st.st_ex_mode)) {
2625 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2626 (smb_dname->st.st_ex_mode |
2627 (mode & ~smb_dname->st.st_ex_mode)));
2628 need_re_stat = true;
2629 }
2630 }
2631
2632 /* Change the owner if required. */
2633 if (lp_inherit_owner(SNUM(conn))) {
2634 change_dir_owner_to_parent(conn, parent_dir,
2635 smb_dname->base_name,
2636 &smb_dname->st);
2637 need_re_stat = true;
2638 }
2639
2640 if (need_re_stat) {
2641 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2642 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2643 smb_fname_str_dbg(smb_dname), strerror(errno)));
2644 return map_nt_error_from_unix(errno);
2645 }
2646 }
2647
2648 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2649 smb_dname->base_name);
2650
2651 return NT_STATUS_OK;
2652 }
2653
2654 /****************************************************************************
2655 Ensure we didn't get symlink raced on opening a directory.
2656 ****************************************************************************/
2657
2658 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2659 const SMB_STRUCT_STAT *sbuf2)
2660 {
2661 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2662 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2663 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2664 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2665 return false;
2666 }
2667 return true;
2668 }
2669
2670 /****************************************************************************
2671 Open a directory from an NT SMB call.
2672 ****************************************************************************/
2673
2674 static NTSTATUS open_directory(connection_struct *conn,
2675 struct smb_request *req,
2676 struct smb_filename *smb_dname,
2677 uint32 access_mask,
2678 uint32 share_access,
2679 uint32 create_disposition,
2680 uint32 create_options,
2681 uint32 file_attributes,
2682 int *pinfo,
2683 files_struct **result)
2684 {
2685 files_struct *fsp = NULL;
2686 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2687 struct share_mode_lock *lck = NULL;
2688 NTSTATUS status;
2689 struct timespec mtimespec;
2690 int info = 0;
2691
2692 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2693
2694 /* Ensure we have a directory attribute. */
2695 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2696
2697 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2698 "share_access = 0x%x create_options = 0x%x, "
2699 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2700 smb_fname_str_dbg(smb_dname),
2701 (unsigned int)access_mask,
2702 (unsigned int)share_access,
2703 (unsigned int)create_options,
2704 (unsigned int)create_disposition,
2705 (unsigned int)file_attributes));
2706
2707 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2708 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2709 is_ntfs_stream_smb_fname(smb_dname)) {
2710 DEBUG(2, ("open_directory: %s is a stream name!\n",
2711 smb_fname_str_dbg(smb_dname)));
2712 return NT_STATUS_NOT_A_DIRECTORY;
2713 }
2714
2715 status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2716 access_mask, &access_mask);
2717 if (!NT_STATUS_IS_OK(status)) {
2718 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2719 "on file %s returned %s\n",
2720 smb_fname_str_dbg(smb_dname),
2721 nt_errstr(status)));
2722 return status;
2723 }
2724
2725 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2726 !security_token_has_privilege(get_current_nttok(conn),
2727 SEC_PRIV_SECURITY)) {
2728 DEBUG(10, ("open_directory: open on %s "
2729 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2730 smb_fname_str_dbg(smb_dname)));
2731 return NT_STATUS_PRIVILEGE_NOT_HELD;
2732 }
2733
2734 switch( create_disposition ) {
2735 case FILE_OPEN:
2736
2737 if (!dir_existed) {
2738 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2739 }
2740
2741 info = FILE_WAS_OPENED;
2742 break;
2743
2744 case FILE_CREATE:
2745
2746 /* If directory exists error. If directory doesn't
2747 * exist create. */
2748
2749 if (dir_existed) {
2750 status = NT_STATUS_OBJECT_NAME_COLLISION;
2751 DEBUG(2, ("open_directory: unable to create "
2752 "%s. Error was %s\n",
2753 smb_fname_str_dbg(smb_dname),
2754 nt_errstr(status)));
2755 return status;
2756 }
2757
2758 status = mkdir_internal(conn, smb_dname,
2759 file_attributes);
2760
2761 if (!NT_STATUS_IS_OK(status)) {
2762 DEBUG(2, ("open_directory: unable to create "
2763 "%s. Error was %s\n",
2764 smb_fname_str_dbg(smb_dname),
2765 nt_errstr(status)));
2766 return status;
2767 }
2768
2769 info = FILE_WAS_CREATED;
2770 break;
2771
2772 case FILE_OPEN_IF:
2773 /*
2774 * If directory exists open. If directory doesn't
2775 * exist create.
2776 */
2777
2778 if (dir_existed) {
2779 status = NT_STATUS_OK;
2780 info = FILE_WAS_OPENED;
2781 } else {
2782 status = mkdir_internal(conn, smb_dname,
2783 file_attributes);
2784
2785 if (NT_STATUS_IS_OK(status)) {
2786 info = FILE_WAS_CREATED;
2787 } else {
2788 /* Cope with create race. */
2789 if (!NT_STATUS_EQUAL(status,
2790 NT_STATUS_OBJECT_NAME_COLLISION)) {
2791 DEBUG(2, ("open_directory: unable to create "
2792 "%s. Error was %s\n",
2793 smb_fname_str_dbg(smb_dname),
2794 nt_errstr(status)));
2795 return status;
2796 }
2797 info = FILE_WAS_OPENED;
2798 }
2799 }
2800
2801 break;
2802
2803 case FILE_SUPERSEDE:
2804 case FILE_OVERWRITE:
2805 case FILE_OVERWRITE_IF:
2806 default:
2807 DEBUG(5,("open_directory: invalid create_disposition "
2808 "0x%x for directory %s\n",
2809 (unsigned int)create_disposition,
2810 smb_fname_str_dbg(smb_dname)));
2811 return NT_STATUS_INVALID_PARAMETER;
2812 }
2813
2814 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2815 DEBUG(5,("open_directory: %s is not a directory !\n",
2816 smb_fname_str_dbg(smb_dname)));
2817 return NT_STATUS_NOT_A_DIRECTORY;
2818 }
2819
2820 if (info == FILE_WAS_OPENED) {
2821 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2822 if (!NT_STATUS_IS_OK(status)) {
2823 DEBUG(10, ("open_directory: smbd_check_access_rights on "
2824 "file %s failed with %s\n",
2825 smb_fname_str_dbg(smb_dname),
2826 nt_errstr(status)));
2827 return status;
2828 }
2829 }
2830
2831 status = file_new(req, conn, &fsp);
2832 if(!NT_STATUS_IS_OK(status)) {
2833 return status;
2834 }
2835
2836 /*
2837 * Setup the files_struct for it.
2838 */
2839
2840 fsp->mode = smb_dname->st.st_ex_mode;
2841 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2842 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2843 fsp->file_pid = req ? req->smbpid : 0;
2844 fsp->can_lock = False;
2845 fsp->can_read = False;
2846 fsp->can_write = False;
2847
2848 fsp->share_access = share_access;
2849 fsp->fh->private_options = 0;
2850 /*
2851 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2852 */
2853 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2854 fsp->print_file = NULL;
2855 fsp->modified = False;
2856 fsp->oplock_type = NO_OPLOCK;
2857 fsp->sent_oplock_break = NO_BREAK_SENT;
2858 fsp->is_directory = True;
2859 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2860 status = fsp_set_smb_fname(fsp, smb_dname);
2861 if (!NT_STATUS_IS_OK(status)) {
2862 file_free(req, fsp);
2863 return status;
2864 }
2865
2866 mtimespec = smb_dname->st.st_ex_mtime;
2867
2868 #ifdef O_DIRECTORY
2869 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2870 #else
2871 /* POSIX allows us to open a directory with O_RDONLY. */
2872 status = fd_open(conn, fsp, O_RDONLY, 0);
2873 #endif
2874 if (!NT_STATUS_IS_OK(status)) {
2875 DEBUG(5, ("open_directory: Could not open fd for "
2876 "%s (%s)\n",
2877 smb_fname_str_dbg(smb_dname),
2878 nt_errstr(status)));
2879 file_free(req, fsp);
2880 return status;
2881 }
2882
2883 status = vfs_stat_fsp(fsp);
2884 if (!NT_STATUS_IS_OK(status)) {
2885 fd_close(fsp);
2886 file_free(req, fsp);
2887 return status;
2888 }
2889
2890 /* Ensure there was no race condition. */
2891 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2892 DEBUG(5,("open_directory: stat struct differs for "
2893 "directory %s.\n",
2894 smb_fname_str_dbg(smb_dname)));
2895 fd_close(fsp);
2896 file_free(req, fsp);
2897 return NT_STATUS_ACCESS_DENIED;
2898 }
2899
2900 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2901 conn->connectpath, smb_dname, &mtimespec);
2902
2903 if (lck == NULL) {
2904 DEBUG(0, ("open_directory: Could not get share mode lock for "
2905 "%s\n", smb_fname_str_dbg(smb_dname)));
2906 fd_close(fsp);
2907 file_free(req, fsp);
2908 return NT_STATUS_SHARING_VIOLATION;
2909 }
2910
2911 status = open_mode_check(conn, lck, fsp->name_hash,
2912 access_mask, share_access,
2913 create_options, &dir_existed);
2914
2915 if (!NT_STATUS_IS_OK(status)) {
2916 TALLOC_FREE(lck);
2917 fd_close(fsp);
2918 file_free(req, fsp);
2919 return status;
2920 }
2921
2922 set_share_mode(lck, fsp, get_current_uid(conn),
2923 req ? req->mid : 0, NO_OPLOCK);
2924
2925 /* For directories the delete on close bit at open time seems
2926 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2927 if (create_options & FILE_DELETE_ON_CLOSE) {
2928 status = can_set_delete_on_close(fsp, 0);
2929 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2930 TALLOC_FREE(lck);
2931 fd_close(fsp);
2932 file_free(req, fsp);
2933 return status;
2934 }
2935
2936 if (NT_STATUS_IS_OK(status)) {
2937 /* Note that here we set the *inital* delete on close flag,
2938 not the regular one. The magic gets handled in close. */
2939 fsp->initial_delete_on_close = True;
2940 }
2941 }
2942
2943 TALLOC_FREE(lck);
2944
2945 if (pinfo) {
2946 *pinfo = info;
2947 }
2948
2949 *result = fsp;
2950 return NT_STATUS_OK;
2951 }
2952
2953 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2954 struct smb_filename *smb_dname)
2955 {
2956 NTSTATUS status;
2957 files_struct *fsp;
2958
2959 status = SMB_VFS_CREATE_FILE(
2960 conn, /* conn */
2961 req, /* req */
2962 0, /* root_dir_fid */
2963 smb_dname, /* fname */
2964 FILE_READ_ATTRIBUTES, /* access_mask */
2965 FILE_SHARE_NONE, /* share_access */
2966 FILE_CREATE, /* create_disposition*/
2967 FILE_DIRECTORY_FILE, /* create_options */
2968 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2969 0, /* oplock_request */
2970 0, /* allocation_size */
2971 0, /* private_flags */
2972 NULL, /* sd */
2973 NULL, /* ea_list */
2974 &fsp, /* result */
2975 NULL); /* pinfo */
2976
2977 if (NT_STATUS_IS_OK(status)) {
2978 close_file(req, fsp, NORMAL_CLOSE);
2979 }
2980
2981 return status;
2982 }
2983
2984 /****************************************************************************
2985 Receive notification that one of our open files has been renamed by another
2986 smbd process.
2987 ****************************************************************************/
2988
2989 void msg_file_was_renamed(struct messaging_context *msg,
2990 void *private_data,
2991 uint32_t msg_type,
2992 struct server_id server_id,
2993 DATA_BLOB *data)
2994 {
2995 files_struct *fsp;
2996 char *frm = (char *)data->data;
2997 struct file_id id;
2998 const char *sharepath;
2999 const char *base_name;
3000 const char *stream_name;
3001 struct smb_filename *smb_fname = NULL;
3002 size_t sp_len, bn_len;
3003 NTSTATUS status;
3004 struct smbd_server_connection *sconn =
3005 talloc_get_type_abort(private_data,
3006 struct smbd_server_connection);
3007
3008 if (data->data == NULL
3009 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3010 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3011 (int)data->length));
3012 return;
3013 }
3014
3015 /* Unpack the message. */
3016 pull_file_id_24(frm, &id);
3017 sharepath = &frm[24];
3018 sp_len = strlen(sharepath);
3019 base_name = sharepath + sp_len + 1;
3020 bn_len = strlen(base_name);
3021 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3022
3023 /* stream_name must always be NULL if there is no stream. */
3024 if (stream_name[0] == '\0') {
3025 stream_name = NULL;
3026 }
3027
3028 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3029 stream_name, NULL, &smb_fname);
3030 if (!NT_STATUS_IS_OK(status)) {
3031 return;
3032 }
3033
3034 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3035 "file_id %s\n",
3036 sharepath, smb_fname_str_dbg(smb_fname),
3037 file_id_string_tos(&id)));
3038
3039 for(fsp = file_find_di_first(sconn, id); fsp;
3040 fsp = file_find_di_next(fsp)) {
3041 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3042
3043 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3044 fsp->fnum, fsp_str_dbg(fsp),
3045 smb_fname_str_dbg(smb_fname)));
3046 status = fsp_set_smb_fname(fsp, smb_fname);
3047 if (!NT_STATUS_IS_OK(status)) {
3048 goto out;
3049 }
3050 } else {
3051 /* TODO. JRA. */
3052 /* Now we have the complete path we can work out if this is
3053 actually within this share and adjust newname accordingly. */
3054 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3055 "not sharepath %s) "
3056 "fnum %d from %s -> %s\n",
3057 fsp->conn->connectpath,
3058 sharepath,
3059 fsp->fnum,
3060 fsp_str_dbg(fsp),
3061 smb_fname_str_dbg(smb_fname)));
3062 }
3063 }
3064 out:
3065 TALLOC_FREE(smb_fname);
3066 return;
3067 }
3068
3069 /*
3070 * If a main file is opened for delete, all streams need to be checked for
3071 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3072 * If that works, delete them all by setting the delete on close and close.
3073 */
3074
3075 NTSTATUS open_streams_for_delete(connection_struct *conn,
3076 const char *fname)
3077 {
3078 struct stream_struct *stream_info = NULL;
3079 files_struct **streams = NULL;
3080 int i;
3081 unsigned int num_streams = 0;
3082 TALLOC_CTX *frame = talloc_stackframe();
3083 NTSTATUS status;
3084
3085 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3086 &num_streams, &stream_info);
3087
3088 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3089 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3090 DEBUG(10, ("no streams around\n"));
3091 TALLOC_FREE(frame);
3092 return NT_STATUS_OK;
3093 }
3094
3095 if (!NT_STATUS_IS_OK(status)) {
3096 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3097 nt_errstr(status)));
3098 goto fail;
3099 }
3100
3101 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3102 num_streams));
3103
3104 if (num_streams == 0) {
3105 TALLOC_FREE(frame);
3106 return NT_STATUS_OK;
3107 }
3108
3109 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3110 if (streams == NULL) {
3111 DEBUG(0, ("talloc failed\n"));
3112 status = NT_STATUS_NO_MEMORY;
3113 goto fail;
3114 }
3115
3116 for (i=0; i<num_streams; i++) {
3117 struct smb_filename *smb_fname = NULL;
3118
3119 if (strequal(stream_info[i].name, "::$DATA")) {
3120 streams[i] = NULL;
3121 continue;
3122 }
3123
3124 status = create_synthetic_smb_fname(talloc_tos(), fname,
3125 stream_info[i].name,
3126 NULL, &smb_fname);
3127 if (!NT_STATUS_IS_OK(status)) {
3128 goto fail;
3129 }
3130
3131 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3132 DEBUG(10, ("Unable to stat stream: %s\n",
3133 smb_fname_str_dbg(smb_fname)));
3134 }
3135
3136 status = SMB_VFS_CREATE_FILE(
3137 conn, /* conn */
3138 NULL, /* req */
3139 0, /* root_dir_fid */
3140 smb_fname, /* fname */
3141 DELETE_ACCESS, /* access_mask */
3142 (FILE_SHARE_READ | /* share_access */
3143 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3144 FILE_OPEN, /* create_disposition*/
3145 0, /* create_options */
3146 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3147 0, /* oplock_request */
3148 0, /* allocation_size */
3149 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3150 NULL, /* sd */
3151 NULL, /* ea_list */
3152 &streams[i], /* result */
3153 NULL); /* pinfo */
3154
3155 if (!NT_STATUS_IS_OK(status)) {
3156 DEBUG(10, ("Could not open stream %s: %s\n",
3157 smb_fname_str_dbg(smb_fname),
3158 nt_errstr(status)));
3159
3160 TALLOC_FREE(smb_fname);
3161 break;
3162 }
3163 TALLOC_FREE(smb_fname);
3164 }
3165
3166 /*
3167 * don't touch the variable "status" beyond this point :-)
3168 */
3169
3170 for (i -= 1 ; i >= 0; i--) {
3171 if (streams[i] == NULL) {
3172 continue;
3173 }
3174
3175 DEBUG(10, ("Closing stream # %d, %s\n", i,
3176 fsp_str_dbg(streams[i])));
3177 close_file(NULL, streams[i], NORMAL_CLOSE);
3178 }
3179
3180 fail:
3181 TALLOC_FREE(frame);
3182 return status;
3183 }
3184
3185 /*********************************************************************
3186 Create a default ACL by inheriting from the parent. If no inheritance
3187 from the parent available, don't set anything. This will leave the actual
3188 permissions the new file or directory already got from the filesystem
3189 as the NT ACL when read.
3190 *********************************************************************/
3191
3192 static NTSTATUS inherit_new_acl(files_struct *fsp)
3193 {
3194 TALLOC_CTX *ctx = talloc_tos();
3195 char *parent_name = NULL;
3196 struct security_descriptor *parent_desc = NULL;
3197 NTSTATUS status = NT_STATUS_OK;
3198 struct security_descriptor *psd = NULL;
3199 struct dom_sid *owner_sid = NULL;
3200 struct dom_sid *group_sid = NULL;
3201 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3202 bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3203 bool inheritable_components = false;
3204 size_t size = 0;
3205
3206 if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3207 return NT_STATUS_NO_MEMORY;
3208 }
3209
3210 status = SMB_VFS_GET_NT_ACL(fsp->conn,
3211 parent_name,
3212 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3213 &parent_desc);
3214 if (!NT_STATUS_IS_OK(status)) {
3215 return status;
3216 }
3217
3218 inheritable_components = sd_has_inheritable_components(parent_desc,
3219 fsp->is_directory);
3220
3221 if (!inheritable_components && !inherit_owner) {
3222 /* Nothing to inherit and not setting owner. */
3223 return NT_STATUS_OK;
3224 }
3225
3226 /* Create an inherited descriptor from the parent. */
3227
3228 if (DEBUGLEVEL >= 10) {
3229 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3230 fsp_str_dbg(fsp) ));
3231 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3232 }
3233
3234 /* Inherit from parent descriptor if "inherit owner" set. */
3235 if (inherit_owner) {
3236 owner_sid = parent_desc->owner_sid;
3237 group_sid = parent_desc->group_sid;
3238 }
3239
3240 if (owner_sid == NULL) {
3241 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3242 }
3243 if (group_sid == NULL) {
3244 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3245 }
3246
3247 status = se_create_child_secdesc(ctx,
3248 &psd,
3249 &size,
3250 parent_desc,
3251 owner_sid,
3252 group_sid,
3253 fsp->is_directory);
3254 if (!NT_STATUS_IS_OK(status)) {
3255 return status;
3256 }
3257
3258 /* If inheritable_components == false,
3259 se_create_child_secdesc()
3260 creates a security desriptor with a NULL dacl
3261 entry, but with SEC_DESC_DACL_PRESENT. We need
3262 to remove that flag. */
3263
3264 if (!inheritable_components) {
3265 security_info_sent &= ~SECINFO_DACL;
3266 psd->type &= ~SEC_DESC_DACL_PRESENT;
3267 }
3268
3269 if (DEBUGLEVEL >= 10) {
3270 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3271 fsp_str_dbg(fsp) ));
3272 NDR_PRINT_DEBUG(security_descriptor, psd);
3273 }
3274
3275 if (inherit_owner) {
3276 /* We need to be root to force this. */
3277 become_root();
3278 }
3279 status = SMB_VFS_FSET_NT_ACL(fsp,
3280 security_info_sent,
3281 psd);
3282 if (inherit_owner) {
3283 unbecome_root();
3284 }
3285 return status;
3286 }
3287
3288 /*
3289 * Wrapper around open_file_ntcreate and open_directory
3290 */
3291
3292 static NTSTATUS create_file_unixpath(connection_struct *conn,
3293 struct smb_request *req,
3294 struct smb_filename *smb_fname,
3295 uint32_t access_mask,
3296 uint32_t share_access,
3297 uint32_t create_disposition,
3298 uint32_t create_options,
3299 uint32_t file_attributes,
3300 uint32_t oplock_request,
3301 uint64_t allocation_size,
3302 uint32_t private_flags,
3303 struct security_descriptor *sd,
3304 struct ea_list *ea_list,
3305
3306 files_struct **result,
3307 int *pinfo)
3308 {
3309 int info = FILE_WAS_OPENED;
3310 files_struct *base_fsp = NULL;
3311 files_struct *fsp = NULL;
3312 NTSTATUS status;
3313
3314 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3315 "file_attributes = 0x%x, share_access = 0x%x, "
3316 "create_disposition = 0x%x create_options = 0x%x "
3317 "oplock_request = 0x%x private_flags = 0x%x "
3318 "ea_list = 0x%p, sd = 0x%p, "
3319 "fname = %s\n",
3320 (unsigned int)access_mask,
3321 (unsigned int)file_attributes,
3322 (unsigned int)share_access,
3323 (unsigned int)create_disposition,
3324 (unsigned int)create_options,
3325 (unsigned int)oplock_request,
3326 (unsigned int)private_flags,
3327 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3328
3329 if (create_options & FILE_OPEN_BY_FILE_ID) {
3330 status = NT_STATUS_NOT_SUPPORTED;
3331 goto fail;
3332 }
3333
3334 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3335 status = NT_STATUS_INVALID_PARAMETER;
3336 goto fail;
3337 }
3338
3339 if (req == NULL) {
3340 oplock_request |= INTERNAL_OPEN_ONLY;
3341 }
3342
3343 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3344 && (access_mask & DELETE_ACCESS)
3345 && !is_ntfs_stream_smb_fname(smb_fname)) {
3346 /*
3347 * We can't open a file with DELETE access if any of the
3348 * streams is open without FILE_SHARE_DELETE
3349 */
3350 status = open_streams_for_delete(conn, smb_fname->base_name);
3351
3352 if (!NT_STATUS_IS_OK(status)) {
3353 goto fail;
3354 }
3355 }
3356
3357 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3358 !security_token_has_privilege(get_current_nttok(conn),
3359 SEC_PRIV_SECURITY)) {
3360 DEBUG(10, ("create_file_unixpath: open on %s "
3361 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3362 smb_fname_str_dbg(smb_fname)));
3363 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3364 goto fail;
3365 }
3366
3367 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3368 && is_ntfs_stream_smb_fname(smb_fname)
3369 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3370 uint32 base_create_disposition;
3371 struct smb_filename *smb_fname_base = NULL;
3372
3373 if (create_options & FILE_DIRECTORY_FILE) {
3374 status = NT_STATUS_NOT_A_DIRECTORY;
3375 goto fail;
3376 }
3377
3378 switch (create_disposition) {
3379 case FILE_OPEN:
3380 base_create_disposition = FILE_OPEN;
3381 break;
3382 default:
3383 base_create_disposition = FILE_OPEN_IF;
3384 break;
3385 }
3386
3387 /* Create an smb_filename with stream_name == NULL. */
3388 status = create_synthetic_smb_fname(talloc_tos(),
3389 smb_fname->base_name,
3390 NULL, NULL,
3391 &smb_fname_base);
3392 if (!NT_STATUS_IS_OK(status)) {
3393 goto fail;
3394 }
3395
3396 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3397 DEBUG(10, ("Unable to stat stream: %s\n",
3398 smb_fname_str_dbg(smb_fname_base)));
3399 }
3400
3401 /* Open the base file. */
3402 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3403 FILE_SHARE_READ
3404 | FILE_SHARE_WRITE
3405 | FILE_SHARE_DELETE,
3406 base_create_disposition,
3407 0, 0, 0, 0, 0, NULL, NULL,
3408 &base_fsp, NULL);
3409 TALLOC_FREE(smb_fname_base);
3410
3411 if (!NT_STATUS_IS_OK(status)) {
3412 DEBUG(10, ("create_file_unixpath for base %s failed: "
3413 "%s\n", smb_fname->base_name,
3414 nt_errstr(status)));
3415 goto fail;
3416 }
3417 /* we don't need to low level fd */
3418 fd_close(base_fsp);
3419 }
3420
3421 /*
3422 * If it's a request for a directory open, deal with it separately.
3423 */
3424
3425 if (create_options & FILE_DIRECTORY_FILE) {
3426
3427 if (create_options & FILE_NON_DIRECTORY_FILE) {
3428 status = NT_STATUS_INVALID_PARAMETER;
3429 goto fail;
3430 }
3431
3432 /* Can't open a temp directory. IFS kit test. */
3433 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3434 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3435 status = NT_STATUS_INVALID_PARAMETER;
3436 goto fail;
3437 }
3438
3439 /*
3440 * We will get a create directory here if the Win32
3441 * app specified a security descriptor in the
3442 * CreateDirectory() call.
3443 */
3444
3445 oplock_request = 0;
3446 status = open_directory(
3447 conn, req, smb_fname, access_mask, share_access,
3448 create_disposition, create_options, file_attributes,
3449 &info, &fsp);
3450 } else {
3451
3452 /*
3453 * Ordinary file case.
3454 */
3455
3456 status = file_new(req, conn, &fsp);
3457 if(!NT_STATUS_IS_OK(status)) {
3458 goto fail;
3459 }
3460
3461 status = fsp_set_smb_fname(fsp, smb_fname);
3462 if (!NT_STATUS_IS_OK(status)) {
3463 goto fail;
3464 }
3465
3466 /*
3467 * We're opening the stream element of a base_fsp
3468 * we already opened. Set up the base_fsp pointer.
3469 */
3470 if (base_fsp) {
3471 fsp->base_fsp = base_fsp;
3472 }
3473
3474 status = open_file_ntcreate(conn,
3475 req,
3476 access_mask,
3477 share_access,
3478 create_disposition,
3479 create_options,
3480 file_attributes,
3481 oplock_request,
3482 private_flags,
3483 &info,
3484 fsp);
3485
3486 if(!NT_STATUS_IS_OK(status)) {
3487 file_free(req, fsp);
3488 fsp = NULL;
3489 }
3490
3491 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3492
3493 /* A stream open never opens a directory */
3494
3495 if (base_fsp) {
3496 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3497 goto fail;
3498 }
3499
3500 /*
3501 * Fail the open if it was explicitly a non-directory
3502 * file.
3503 */
3504
3505 if (create_options & FILE_NON_DIRECTORY_FILE) {
3506 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3507 goto fail;
3508 }
3509
3510 oplock_request = 0;
3511 status = open_directory(
3512 conn, req, smb_fname, access_mask,
3513 share_access, create_disposition,
3514 create_options, file_attributes,
3515 &info, &fsp);
3516 }
3517 }
3518
3519 if (!NT_STATUS_IS_OK(status)) {
3520 goto fail;
3521 }
3522
3523 fsp->base_fsp = base_fsp;
3524
3525 if ((ea_list != NULL) &&
3526 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3527 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3528 if (!NT_STATUS_IS_OK(status)) {
3529 goto fail;
3530 }
3531 }
3532
3533 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3534 status = NT_STATUS_ACCESS_DENIED;
3535 goto fail;
3536 }
3537
3538 /* Save the requested allocation size. */
3539 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3540 if (allocation_size
3541 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3542 fsp->initial_allocation_size = smb_roundup(
3543 fsp->conn, allocation_size);
3544 if (fsp->is_directory) {
3545 /* Can't set allocation size on a directory. */
3546 status = NT_STATUS_ACCESS_DENIED;
3547 goto fail;
3548 }
3549 if (vfs_allocate_file_space(
3550 fsp, fsp->initial_allocation_size) == -1) {
3551 status = NT_STATUS_DISK_FULL;
3552 goto fail;
3553 }
3554 } else {
3555 fsp->initial_allocation_size = smb_roundup(
3556 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3557 }
3558 }
3559
3560 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3561 fsp->base_fsp == NULL) {
3562 if (sd != NULL) {
3563 /*
3564 * According to the MS documentation, the only time the security
3565 * descriptor is applied to the opened file is iff we *created* the
3566 * file; an existing file stays the same.
3567 *
3568 * Also, it seems (from observation) that you can open the file with
3569 * any access mask but you can still write the sd. We need to override
3570 * the granted access before we call set_sd
3571 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3572 */
3573
3574 uint32_t sec_info_sent;
3575 uint32_t saved_access_mask = fsp->access_mask;
3576
3577 sec_info_sent = get_sec_info(sd);
3578
3579 fsp->access_mask = FILE_GENERIC_ALL;
3580
3581 /* Convert all the generic bits. */
3582 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3583 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3584
3585 if (sec_info_sent & (SECINFO_OWNER|
3586 SECINFO_GROUP|
3587 SECINFO_DACL|
3588 SECINFO_SACL)) {
3589 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3590 }
3591
3592 fsp->access_mask = saved_access_mask;
3593
3594 if (!NT_STATUS_IS_OK(status)) {
3595 goto fail;
3596 }
3597 } else if (lp_inherit_acls(SNUM(conn))) {
3598 /* Inherit from parent. Errors here are not fatal. */
3599 status = inherit_new_acl(fsp);
3600 if (!NT_STATUS_IS_OK(status)) {
3601 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3602 fsp_str_dbg(fsp),
3603 nt_errstr(status) ));
3604 }
3605 }
3606 }
3607
3608 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3609
3610 *result = fsp;
3611 if (pinfo != NULL) {
3612 *pinfo = info;
3613 }
3614
3615 smb_fname->st = fsp->fsp_name->st;
3616
3617 return NT_STATUS_OK;
3618
3619 fail:
3620 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3621
3622 if (fsp != NULL) {
3623 if (base_fsp && fsp->base_fsp == base_fsp) {
3624 /*
3625 * The close_file below will close
3626 * fsp->base_fsp.
3627 */
3628 base_fsp = NULL;
3629 }
3630 close_file(req, fsp, ERROR_CLOSE);
3631 fsp = NULL;
3632 }
3633 if (base_fsp != NULL) {
3634 close_file(req, base_fsp, ERROR_CLOSE);
3635 base_fsp = NULL;
3636 }
3637 return status;
3638 }
3639
3640 /*
3641 * Calculate the full path name given a relative fid.
3642 */
3643 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3644 struct smb_request *req,
3645 uint16_t root_dir_fid,
3646 const struct smb_filename *smb_fname,
3647 struct smb_filename **smb_fname_out)
3648 {
3649 files_struct *dir_fsp;
3650 char *parent_fname = NULL;
3651 char *new_base_name = NULL;
3652 NTSTATUS status;
3653
3654 if (root_dir_fid == 0 || !smb_fname) {
3655 status = NT_STATUS_INTERNAL_ERROR;
3656 goto out;
3657 }
3658
3659 dir_fsp = file_fsp(req, root_dir_fid);
3660
3661 if (dir_fsp == NULL) {
3662 status = NT_STATUS_INVALID_HANDLE;
3663 goto out;
3664 }
3665
3666 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3667 status = NT_STATUS_INVALID_HANDLE;
3668 goto out;
3669 }
3670
3671 if (!dir_fsp->is_directory) {
3672
3673 /*
3674 * Check to see if this is a mac fork of some kind.
3675 */
3676
3677 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3678 is_ntfs_stream_smb_fname(smb_fname)) {
3679 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3680 goto out;
3681 }
3682
3683 /*
3684 we need to handle the case when we get a
3685 relative open relative to a file and the
3686 pathname is blank - this is a reopen!
3687 (hint from demyn plantenberg)
3688 */
3689
3690 status = NT_STATUS_INVALID_HANDLE;
3691 goto out;
3692 }
3693
3694 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3695 /*
3696 * We're at the toplevel dir, the final file name
3697 * must not contain ./, as this is filtered out
3698 * normally by srvstr_get_path and unix_convert
3699 * explicitly rejects paths containing ./.
3700 */
3701 parent_fname = talloc_strdup(talloc_tos(), "");
3702 if (parent_fname == NULL) {
3703 status = NT_STATUS_NO_MEMORY;
3704 goto out;
3705 }
3706 } else {
3707 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3708
3709 /*
3710 * Copy in the base directory name.
3711 */
3712
3713 parent_fname = talloc_array(talloc_tos(), char,
3714 dir_name_len+2);
3715 if (parent_fname == NULL) {
3716 status = NT_STATUS_NO_MEMORY;
3717 goto out;
3718 }
3719 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3720 dir_name_len+1);
3721
3722 /*
3723 * Ensure it ends in a '/'.
3724 * We used TALLOC_SIZE +2 to add space for the '/'.
3725 */
3726
3727 if(dir_name_len
3728 && (parent_fname[dir_name_len-1] != '\\')
3729 && (parent_fname[dir_name_len-1] != '/')) {
3730 parent_fname[dir_name_len] = '/';
3731 parent_fname[dir_name_len+1] = '\0';
3732 }
3733 }
3734
3735 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3736 smb_fname->base_name);
3737 if (new_base_name == NULL) {
3738 status = NT_STATUS_NO_MEMORY;
3739 goto out;
3740 }
3741
3742 status = filename_convert(req,
3743 conn,
3744 req->flags2 & FLAGS2_DFS_PATHNAMES,
3745 new_base_name,
3746 0,
3747 NULL,
3748 smb_fname_out);
3749 if (!NT_STATUS_IS_OK(status)) {
3750 goto out;
3751 }
3752
3753 out:
3754 TALLOC_FREE(parent_fname);
3755 TALLOC_FREE(new_base_name);
3756 return status;
3757 }
3758
3759 NTSTATUS create_file_default(connection_struct *conn,
3760 struct smb_request *req,
3761 uint16_t root_dir_fid,
3762 struct smb_filename *smb_fname,
3763 uint32_t access_mask,
3764 uint32_t share_access,
3765 uint32_t create_disposition,
3766 uint32_t create_options,
3767 uint32_t file_attributes,
3768 uint32_t oplock_request,
3769 uint64_t allocation_size,
3770 uint32_t private_flags,
3771 struct security_descriptor *sd,
3772 struct ea_list *ea_list,
3773 files_struct **result,
3774 int *pinfo)
3775 {
3776 int info = FILE_WAS_OPENED;
3777 files_struct *fsp = NULL;
3778 NTSTATUS status;
3779 bool stream_name = false;
3780
3781 DEBUG(10,("create_file: access_mask = 0x%x "
3782 "file_attributes = 0x%x, share_access = 0x%x, "
3783 "create_disposition = 0x%x create_options = 0x%x "
3784 "oplock_request = 0x%x "
3785 "private_flags = 0x%x "
3786 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3787 "fname = %s\n",
3788 (unsigned int)access_mask,
3789 (unsigned int)file_attributes,
3790 (unsigned int)share_access,
3791 (unsigned int)create_disposition,
3792 (unsigned int)create_options,
3793 (unsigned int)oplock_request,
3794 (unsigned int)private_flags,
3795 (unsigned int)root_dir_fid,
3796 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3797
3798 /*
3799 * Calculate the filename from the root_dir_if if necessary.
3800 */
3801
3802 if (root_dir_fid != 0) {
3803 struct smb_filename *smb_fname_out = NULL;
3804 status = get_relative_fid_filename(conn, req, root_dir_fid,
3805 smb_fname, &smb_fname_out);
3806 if (!NT_STATUS_IS_OK(status)) {
3807 goto fail;
3808 }
3809 smb_fname = smb_fname_out;
3810 }
3811
3812 /*
3813 * Check to see if this is a mac fork of some kind.
3814 */
3815
3816 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3817 if (stream_name) {
3818 enum FAKE_FILE_TYPE fake_file_type;
3819
3820 fake_file_type = is_fake_file(smb_fname);
3821
3822 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3823
3824 /*
3825 * Here we go! support for changing the disk quotas
3826 * --metze
3827 *
3828 * We need to fake up to open this MAGIC QUOTA file
3829 * and return a valid FID.
3830 *
3831 * w2k close this file directly after openening xp
3832 * also tries a QUERY_FILE_INFO on the file and then
3833 * close it
3834 */
3835 status = open_fake_file(req, conn, req->vuid,
3836 fake_file_type, smb_fname,
3837 access_mask, &fsp);
3838 if (!NT_STATUS_IS_OK(status)) {
3839 goto fail;
3840 }
3841
3842 ZERO_STRUCT(smb_fname->st);
3843 goto done;
3844 }
3845
3846 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3847 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3848 goto fail;
3849 }
3850 }
3851
3852 /* All file access must go through check_name() */
3853
3854 status = check_name(conn, smb_fname->base_name);
3855 if (!NT_STATUS_IS_OK(status)) {
3856 goto fail;
3857 }
3858
3859 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3860 int ret;
3861 smb_fname->stream_name = NULL;
3862 /* We have to handle this error here. */
3863 if (create_options & FILE_DIRECTORY_FILE) {
3864 status = NT_STATUS_NOT_A_DIRECTORY;
3865 goto fail;
3866 }
3867 if (lp_posix_pathnames()) {
3868 ret = SMB_VFS_LSTAT(conn, smb_fname);
3869 } else {
3870 ret = SMB_VFS_STAT(conn, smb_fname);
3871 }
3872
3873 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3874 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3875 goto fail;
3876 }
3877 }
3878
3879 status = create_file_unixpath(
3880 conn, req, smb_fname, access_mask, share_access,
3881 create_disposition, create_options, file_attributes,
3882 oplock_request, allocation_size, private_flags,
3883 sd, ea_list,
3884 &fsp, &info);
3885
3886 if (!NT_STATUS_IS_OK(status)) {
3887 goto fail;
3888 }
3889
3890 done:
3891 DEBUG(10, ("create_file: info=%d\n", info));
3892
3893 *result = fsp;
3894 if (pinfo != NULL) {
3895 *pinfo = info;
3896 }
3897 return NT_STATUS_OK;
3898
3899 fail:
3900 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3901
3902 if (fsp != NULL) {
3903 close_file(req, fsp, ERROR_CLOSE);
3904 fsp = NULL;
3905 }
3906 return status;
3907 }
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