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Move root check out of smb1_file_se_access_check() in preparation for deleting this...
[Samba/id10ts.git] / source3 / smbd / open.c
blob6e93854b6b86325ccf951053fb0a123fca7f4f9c
1 /*
2 Unix SMB/CIFS implementation.
3 file opening and share modes
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2004
6 Copyright (C) Volker Lendecke 2005
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "system/filesys.h"
24 #include "printing.h"
25 #include "smbd/smbd.h"
26 #include "smbd/globals.h"
27 #include "fake_file.h"
28 #include "../libcli/security/security.h"
29 #include "../librpc/gen_ndr/ndr_security.h"
30 #include "auth.h"
31 #include "messages.h"
32
33 extern const struct generic_mapping file_generic_mapping;
34
35 struct deferred_open_record {
36 bool delayed_for_oplocks;
37 struct file_id id;
38 };
39
40 /****************************************************************************
41 SMB1 file varient of se_access_check. Never test FILE_READ_ATTRIBUTES.
42 ****************************************************************************/
43
44 static NTSTATUS smb1_file_se_access_check(struct connection_struct *conn,
45 const struct security_descriptor *sd,
46 const struct security_token *token,
47 uint32_t access_desired,
48 uint32_t *access_granted)
49 {
50 *access_granted = 0;
51
52 return se_access_check(sd,
53 token,
54 (access_desired & ~FILE_READ_ATTRIBUTES),
55 access_granted);
56 }
57
58 /****************************************************************************
59 If the requester wanted DELETE_ACCESS and was rejected because
60 the file ACL didn't include DELETE_ACCESS, see if the parent ACL
61 ovverrides this.
62 ****************************************************************************/
63
64 static bool parent_override_delete(connection_struct *conn,
65 struct smb_filename *smb_fname,
66 uint32_t access_mask,
67 uint32_t rejected_mask)
68 {
69 if ((access_mask & DELETE_ACCESS) &&
70 (rejected_mask & DELETE_ACCESS) &&
71 can_delete_file_in_directory(conn, smb_fname)) {
72 return true;
73 }
74 return false;
75 }
76
77 /****************************************************************************
78 Check if we have open rights.
79 ****************************************************************************/
80
81 static NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
82 struct smb_filename *smb_fname,
83 uint32_t access_mask)
84 {
85 /* Check if we have rights to open. */
86 NTSTATUS status;
87 struct security_descriptor *sd = NULL;
88 uint32_t rejected_share_access;
89 uint32_t rejected_mask = 0;
90
91 rejected_share_access = access_mask & ~(conn->share_access);
92
93 if (rejected_share_access) {
94 DEBUG(10, ("smbd_check_open_rights: rejected share access 0x%x "
95 "on %s (0x%x)\n",
96 (unsigned int)access_mask,
97 smb_fname_str_dbg(smb_fname),
98 (unsigned int)rejected_share_access ));
99 return NT_STATUS_ACCESS_DENIED;
100 }
101
102 if (get_current_uid(conn) == (uid_t)0) {
103 /* I'm sorry sir, I didn't know you were root... */
104 DEBUG(10,("smbd_check_open_rights: root override "
105 "on %s. Granting 0x%x\n",
106 smb_fname_str_dbg(smb_fname),
107 (unsigned int)access_mask ));
108 return NT_STATUS_OK;
109 }
110
111 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
112 DEBUG(10,("smbd_check_open_rights: not checking ACL "
113 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
114 smb_fname_str_dbg(smb_fname),
115 (unsigned int)access_mask ));
116 return NT_STATUS_OK;
117 }
118
119 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
120 (SECINFO_OWNER |
121 SECINFO_GROUP |
122 SECINFO_DACL),&sd);
123
124 if (!NT_STATUS_IS_OK(status)) {
125 DEBUG(10, ("smbd_check_open_rights: Could not get acl "
126 "on %s: %s\n",
127 smb_fname_str_dbg(smb_fname),
128 nt_errstr(status)));
129 return status;
130 }
131
132 status = smb1_file_se_access_check(conn,
133 sd,
134 get_current_nttok(conn),
135 access_mask,
136 &rejected_mask);
137
138 DEBUG(10,("smbd_check_open_rights: file %s requesting "
139 "0x%x returning 0x%x (%s)\n",
140 smb_fname_str_dbg(smb_fname),
141 (unsigned int)access_mask,
142 (unsigned int)rejected_mask,
143 nt_errstr(status) ));
144
145 if (!NT_STATUS_IS_OK(status)) {
146 if (DEBUGLEVEL >= 10) {
147 DEBUG(10,("smbd_check_open_rights: acl for %s is:\n",
148 smb_fname_str_dbg(smb_fname) ));
149 NDR_PRINT_DEBUG(security_descriptor, sd);
150 }
151 }
152
153 TALLOC_FREE(sd);
154
155 if (NT_STATUS_IS_OK(status) ||
156 !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
157 return status;
158 }
159
160 /* Here we know status == NT_STATUS_ACCESS_DENIED. */
161 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
162 (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
163 (lp_map_readonly(SNUM(conn)) ||
164 lp_map_archive(SNUM(conn)) ||
165 lp_map_hidden(SNUM(conn)) ||
166 lp_map_system(SNUM(conn)))) {
167 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
168
169 DEBUG(10,("smbd_check_open_rights: "
170 "overrode "
171 "FILE_WRITE_ATTRIBUTES "
172 "on file %s\n",
173 smb_fname_str_dbg(smb_fname)));
174 }
175
176 if (parent_override_delete(conn,
177 smb_fname,
178 access_mask,
179 rejected_mask)) {
180 /* Were we trying to do an open
181 * for delete and didn't get DELETE
182 * access (only) ? Check if the
183 * directory allows DELETE_CHILD.
184 * See here:
185 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
186 * for details. */
187
188 rejected_mask &= ~DELETE_ACCESS;
189
190 DEBUG(10,("smbd_check_open_rights: "
191 "overrode "
192 "DELETE_ACCESS on "
193 "file %s\n",
194 smb_fname_str_dbg(smb_fname)));
195 }
196
197 if (rejected_mask != 0) {
198 return NT_STATUS_ACCESS_DENIED;
199 } else {
200 return NT_STATUS_OK;
201 }
202 }
203
204 static NTSTATUS check_parent_access(struct connection_struct *conn,
205 struct smb_filename *smb_fname,
206 uint32_t access_mask,
207 char **pp_parent_dir)
208 {
209 NTSTATUS status;
210 char *parent_dir = NULL;
211 struct security_descriptor *parent_sd = NULL;
212 uint32_t access_granted = 0;
213
214 if (!parent_dirname(talloc_tos(),
215 smb_fname->base_name,
216 &parent_dir,
217 NULL)) {
218 return NT_STATUS_NO_MEMORY;
219 }
220
221 if (pp_parent_dir) {
222 *pp_parent_dir = parent_dir;
223 }
224
225 if (get_current_uid(conn) == (uid_t)0) {
226 /* I'm sorry sir, I didn't know you were root... */
227 DEBUG(10,("check_parent_access: root override "
228 "on %s. Granting 0x%x\n",
229 smb_fname_str_dbg(smb_fname),
230 (unsigned int)access_mask ));
231 return NT_STATUS_OK;
232 }
233
234 status = SMB_VFS_GET_NT_ACL(conn,
235 parent_dir,
236 SECINFO_DACL,
237 &parent_sd);
238
239 if (!NT_STATUS_IS_OK(status)) {
240 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
241 "%s with error %s\n",
242 parent_dir,
243 nt_errstr(status)));
244 return status;
245 }
246
247 status = smb1_file_se_access_check(conn,
248 parent_sd,
249 get_current_nttok(conn),
250 access_mask,
251 &access_granted);
252 if(!NT_STATUS_IS_OK(status)) {
253 DEBUG(5,("check_parent_access: access check "
254 "on directory %s for "
255 "path %s for mask 0x%x returned (0x%x) %s\n",
256 parent_dir,
257 smb_fname->base_name,
258 access_mask,
259 access_granted,
260 nt_errstr(status) ));
261 return status;
262 }
263
264 return NT_STATUS_OK;
265 }
266
267 /****************************************************************************
268 fd support routines - attempt to do a dos_open.
269 ****************************************************************************/
270
271 static NTSTATUS fd_open(struct connection_struct *conn,
272 files_struct *fsp,
273 int flags,
274 mode_t mode)
275 {
276 struct smb_filename *smb_fname = fsp->fsp_name;
277 NTSTATUS status = NT_STATUS_OK;
278
279 #ifdef O_NOFOLLOW
280 /*
281 * Never follow symlinks on a POSIX client. The
282 * client should be doing this.
283 */
284
285 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
286 flags |= O_NOFOLLOW;
287 }
288 #endif
289
290 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
291 if (fsp->fh->fd == -1) {
292 status = map_nt_error_from_unix(errno);
293 if (errno == EMFILE) {
294 static time_t last_warned = 0L;
295
296 if (time((time_t *) NULL) > last_warned) {
297 DEBUG(0,("Too many open files, unable "
298 "to open more! smbd's max "
299 "open files = %d\n",
300 lp_max_open_files()));
301 last_warned = time((time_t *) NULL);
302 }
303 }
304
305 }
306
307 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
308 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
309 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
310
311 return status;
312 }
313
314 /****************************************************************************
315 Close the file associated with a fsp.
316 ****************************************************************************/
317
318 NTSTATUS fd_close(files_struct *fsp)
319 {
320 int ret;
321
322 if (fsp->dptr) {
323 dptr_CloseDir(fsp);
324 }
325 if (fsp->fh->fd == -1) {
326 return NT_STATUS_OK; /* What we used to call a stat open. */
327 }
328 if (fsp->fh->ref_count > 1) {
329 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
330 }
331
332 ret = SMB_VFS_CLOSE(fsp);
333 fsp->fh->fd = -1;
334 if (ret == -1) {
335 return map_nt_error_from_unix(errno);
336 }
337 return NT_STATUS_OK;
338 }
339
340 /****************************************************************************
341 Change the ownership of a file to that of the parent directory.
342 Do this by fd if possible.
343 ****************************************************************************/
344
345 void change_file_owner_to_parent(connection_struct *conn,
346 const char *inherit_from_dir,
347 files_struct *fsp)
348 {
349 struct smb_filename *smb_fname_parent = NULL;
350 NTSTATUS status;
351 int ret;
352
353 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
354 NULL, NULL, &smb_fname_parent);
355 if (!NT_STATUS_IS_OK(status)) {
356 return;
357 }
358
359 ret = SMB_VFS_STAT(conn, smb_fname_parent);
360 if (ret == -1) {
361 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
362 "directory %s. Error was %s\n",
363 smb_fname_str_dbg(smb_fname_parent),
364 strerror(errno)));
365 TALLOC_FREE(smb_fname_parent);
366 return;
367 }
368
369 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
370 /* Already this uid - no need to change. */
371 DEBUG(10,("change_file_owner_to_parent: file %s "
372 "is already owned by uid %d\n",
373 fsp_str_dbg(fsp),
374 (int)fsp->fsp_name->st.st_ex_uid ));
375 TALLOC_FREE(smb_fname_parent);
376 return;
377 }
378
379 become_root();
380 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
381 unbecome_root();
382 if (ret == -1) {
383 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
384 "file %s to parent directory uid %u. Error "
385 "was %s\n", fsp_str_dbg(fsp),
386 (unsigned int)smb_fname_parent->st.st_ex_uid,
387 strerror(errno) ));
388 } else {
389 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
390 "parent directory uid %u.\n", fsp_str_dbg(fsp),
391 (unsigned int)smb_fname_parent->st.st_ex_uid));
392 /* Ensure the uid entry is updated. */
393 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
394 }
395
396 TALLOC_FREE(smb_fname_parent);
397 }
398
399 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
400 const char *inherit_from_dir,
401 const char *fname,
402 SMB_STRUCT_STAT *psbuf)
403 {
404 struct smb_filename *smb_fname_parent = NULL;
405 struct smb_filename *smb_fname_cwd = NULL;
406 char *saved_dir = NULL;
407 TALLOC_CTX *ctx = talloc_tos();
408 NTSTATUS status = NT_STATUS_OK;
409 int ret;
410
411 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
412 &smb_fname_parent);
413 if (!NT_STATUS_IS_OK(status)) {
414 return status;
415 }
416
417 ret = SMB_VFS_STAT(conn, smb_fname_parent);
418 if (ret == -1) {
419 status = map_nt_error_from_unix(errno);
420 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
421 "directory %s. Error was %s\n",
422 smb_fname_str_dbg(smb_fname_parent),
423 strerror(errno)));
424 goto out;
425 }
426
427 /* We've already done an lstat into psbuf, and we know it's a
428 directory. If we can cd into the directory and the dev/ino
429 are the same then we can safely chown without races as
430 we're locking the directory in place by being in it. This
431 should work on any UNIX (thanks tridge :-). JRA.
432 */
433
434 saved_dir = vfs_GetWd(ctx,conn);
435 if (!saved_dir) {
436 status = map_nt_error_from_unix(errno);
437 DEBUG(0,("change_dir_owner_to_parent: failed to get "
438 "current working directory. Error was %s\n",
439 strerror(errno)));
440 goto out;
441 }
442
443 /* Chdir into the new path. */
444 if (vfs_ChDir(conn, fname) == -1) {
445 status = map_nt_error_from_unix(errno);
446 DEBUG(0,("change_dir_owner_to_parent: failed to change "
447 "current working directory to %s. Error "
448 "was %s\n", fname, strerror(errno) ));
449 goto chdir;
450 }
451
452 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
453 &smb_fname_cwd);
454 if (!NT_STATUS_IS_OK(status)) {
455 return status;
456 }
457
458 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
459 if (ret == -1) {
460 status = map_nt_error_from_unix(errno);
461 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
462 "directory '.' (%s) Error was %s\n",
463 fname, strerror(errno)));
464 goto chdir;
465 }
466
467 /* Ensure we're pointing at the same place. */
468 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
469 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
470 DEBUG(0,("change_dir_owner_to_parent: "
471 "device/inode on directory %s changed. "
472 "Refusing to chown !\n", fname ));
473 status = NT_STATUS_ACCESS_DENIED;
474 goto chdir;
475 }
476
477 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
478 /* Already this uid - no need to change. */
479 DEBUG(10,("change_dir_owner_to_parent: directory %s "
480 "is already owned by uid %d\n",
481 fname,
482 (int)smb_fname_cwd->st.st_ex_uid ));
483 status = NT_STATUS_OK;
484 goto chdir;
485 }
486
487 become_root();
488 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
489 (gid_t)-1);
490 unbecome_root();
491 if (ret == -1) {
492 status = map_nt_error_from_unix(errno);
493 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
494 "directory %s to parent directory uid %u. "
495 "Error was %s\n", fname,
496 (unsigned int)smb_fname_parent->st.st_ex_uid,
497 strerror(errno) ));
498 } else {
499 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
500 "directory %s to parent directory uid %u.\n",
501 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
502 /* Ensure the uid entry is updated. */
503 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
504 }
505
506 chdir:
507 vfs_ChDir(conn,saved_dir);
508 out:
509 TALLOC_FREE(smb_fname_parent);
510 TALLOC_FREE(smb_fname_cwd);
511 return status;
512 }
513
514 /****************************************************************************
515 Open a file.
516 ****************************************************************************/
517
518 static NTSTATUS open_file(files_struct *fsp,
519 connection_struct *conn,
520 struct smb_request *req,
521 const char *parent_dir,
522 int flags,
523 mode_t unx_mode,
524 uint32 access_mask, /* client requested access mask. */
525 uint32 open_access_mask) /* what we're actually using in the open. */
526 {
527 struct smb_filename *smb_fname = fsp->fsp_name;
528 NTSTATUS status = NT_STATUS_OK;
529 int accmode = (flags & O_ACCMODE);
530 int local_flags = flags;
531 bool file_existed = VALID_STAT(fsp->fsp_name->st);
532 bool file_created = false;
533
534 fsp->fh->fd = -1;
535 errno = EPERM;
536
537 /* Check permissions */
538
539 /*
540 * This code was changed after seeing a client open request
541 * containing the open mode of (DENY_WRITE/read-only) with
542 * the 'create if not exist' bit set. The previous code
543 * would fail to open the file read only on a read-only share
544 * as it was checking the flags parameter directly against O_RDONLY,
545 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
546 * JRA.
547 */
548
549 if (!CAN_WRITE(conn)) {
550 /* It's a read-only share - fail if we wanted to write. */
551 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
552 DEBUG(3,("Permission denied opening %s\n",
553 smb_fname_str_dbg(smb_fname)));
554 return NT_STATUS_ACCESS_DENIED;
555 } else if(flags & O_CREAT) {
556 /* We don't want to write - but we must make sure that
557 O_CREAT doesn't create the file if we have write
558 access into the directory.
559 */
560 flags &= ~(O_CREAT|O_EXCL);
561 local_flags &= ~(O_CREAT|O_EXCL);
562 }
563 }
564
565 /*
566 * This little piece of insanity is inspired by the
567 * fact that an NT client can open a file for O_RDONLY,
568 * but set the create disposition to FILE_EXISTS_TRUNCATE.
569 * If the client *can* write to the file, then it expects to
570 * truncate the file, even though it is opening for readonly.
571 * Quicken uses this stupid trick in backup file creation...
572 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
573 * for helping track this one down. It didn't bite us in 2.0.x
574 * as we always opened files read-write in that release. JRA.
575 */
576
577 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
578 DEBUG(10,("open_file: truncate requested on read-only open "
579 "for file %s\n", smb_fname_str_dbg(smb_fname)));
580 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
581 }
582
583 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
584 (!file_existed && (local_flags & O_CREAT)) ||
585 ((local_flags & O_TRUNC) == O_TRUNC) ) {
586 const char *wild;
587
588 /*
589 * We can't actually truncate here as the file may be locked.
590 * open_file_ntcreate will take care of the truncate later. JRA.
591 */
592
593 local_flags &= ~O_TRUNC;
594
595 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
596 /*
597 * We would block on opening a FIFO with no one else on the
598 * other end. Do what we used to do and add O_NONBLOCK to the
599 * open flags. JRA.
600 */
601
602 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
603 local_flags |= O_NONBLOCK;
604 }
605 #endif
606
607 /* Don't create files with Microsoft wildcard characters. */
608 if (fsp->base_fsp) {
609 /*
610 * wildcard characters are allowed in stream names
611 * only test the basefilename
612 */
613 wild = fsp->base_fsp->fsp_name->base_name;
614 } else {
615 wild = smb_fname->base_name;
616 }
617 if ((local_flags & O_CREAT) && !file_existed &&
618 ms_has_wild(wild)) {
619 return NT_STATUS_OBJECT_NAME_INVALID;
620 }
621
622 /* Can we access this file ? */
623 if (!fsp->base_fsp) {
624 /* Only do this check on non-stream open. */
625 if (file_existed) {
626 status = smbd_check_open_rights(conn,
627 smb_fname,
628 access_mask);
629 } else if (local_flags & O_CREAT){
630 status = check_parent_access(conn,
631 smb_fname,
632 SEC_DIR_ADD_FILE,
633 NULL);
634 } else {
635 /* File didn't exist and no O_CREAT. */
636 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
637 }
638 if (!NT_STATUS_IS_OK(status)) {
639 DEBUG(10,("open_file: "
640 "%s on file "
641 "%s returned %s\n",
642 file_existed ?
643 "smbd_check_open_rights" :
644 "check_parent_access",
645 smb_fname_str_dbg(smb_fname),
646 nt_errstr(status) ));
647 return status;
648 }
649 }
650
651 /* Actually do the open */
652 status = fd_open(conn, fsp, local_flags, unx_mode);
653 if (!NT_STATUS_IS_OK(status)) {
654 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
655 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
656 nt_errstr(status),local_flags,flags));
657 return status;
658 }
659
660 if ((local_flags & O_CREAT) && !file_existed) {
661 file_created = true;
662 }
663
664 } else {
665 fsp->fh->fd = -1; /* What we used to call a stat open. */
666 if (!file_existed) {
667 /* File must exist for a stat open. */
668 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
669 }
670
671 status = smbd_check_open_rights(conn,
672 smb_fname,
673 access_mask);
674
675 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
676 fsp->posix_open &&
677 S_ISLNK(smb_fname->st.st_ex_mode)) {
678 /* This is a POSIX stat open for delete
679 * or rename on a symlink that points
680 * nowhere. Allow. */
681 DEBUG(10,("open_file: allowing POSIX "
682 "open on bad symlink %s\n",
683 smb_fname_str_dbg(smb_fname)));
684 status = NT_STATUS_OK;
685 }
686
687 if (!NT_STATUS_IS_OK(status)) {
688 DEBUG(10,("open_file: "
689 "smbd_check_open_rights on file "
690 "%s returned %s\n",
691 smb_fname_str_dbg(smb_fname),
692 nt_errstr(status) ));
693 return status;
694 }
695 }
696
697 if (!file_existed) {
698 int ret;
699
700 if (fsp->fh->fd == -1) {
701 ret = SMB_VFS_STAT(conn, smb_fname);
702 } else {
703 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
704 /* If we have an fd, this stat should succeed. */
705 if (ret == -1) {
706 DEBUG(0,("Error doing fstat on open file %s "
707 "(%s)\n",
708 smb_fname_str_dbg(smb_fname),
709 strerror(errno) ));
710 }
711 }
712
713 /* For a non-io open, this stat failing means file not found. JRA */
714 if (ret == -1) {
715 status = map_nt_error_from_unix(errno);
716 fd_close(fsp);
717 return status;
718 }
719
720 if (file_created) {
721 bool need_re_stat = false;
722 /* Do all inheritance work after we've
723 done a successful stat call and filled
724 in the stat struct in fsp->fsp_name. */
725
726 /* Inherit the ACL if required */
727 if (lp_inherit_perms(SNUM(conn))) {
728 inherit_access_posix_acl(conn, parent_dir,
729 smb_fname->base_name,
730 unx_mode);
731 need_re_stat = true;
732 }
733
734 /* Change the owner if required. */
735 if (lp_inherit_owner(SNUM(conn))) {
736 change_file_owner_to_parent(conn, parent_dir,
737 fsp);
738 need_re_stat = true;
739 }
740
741 if (need_re_stat) {
742 if (fsp->fh->fd == -1) {
743 ret = SMB_VFS_STAT(conn, smb_fname);
744 } else {
745 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
746 /* If we have an fd, this stat should succeed. */
747 if (ret == -1) {
748 DEBUG(0,("Error doing fstat on open file %s "
749 "(%s)\n",
750 smb_fname_str_dbg(smb_fname),
751 strerror(errno) ));
752 }
753 }
754 }
755
756 notify_fname(conn, NOTIFY_ACTION_ADDED,
757 FILE_NOTIFY_CHANGE_FILE_NAME,
758 smb_fname->base_name);
759 }
760 }
761
762 /*
763 * POSIX allows read-only opens of directories. We don't
764 * want to do this (we use a different code path for this)
765 * so catch a directory open and return an EISDIR. JRA.
766 */
767
768 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
769 fd_close(fsp);
770 errno = EISDIR;
771 return NT_STATUS_FILE_IS_A_DIRECTORY;
772 }
773
774 fsp->mode = smb_fname->st.st_ex_mode;
775 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
776 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
777 fsp->file_pid = req ? req->smbpid : 0;
778 fsp->can_lock = True;
779 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
780 if (!CAN_WRITE(conn)) {
781 fsp->can_write = False;
782 } else {
783 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
784 True : False;
785 }
786 fsp->print_file = NULL;
787 fsp->modified = False;
788 fsp->sent_oplock_break = NO_BREAK_SENT;
789 fsp->is_directory = False;
790 if (conn->aio_write_behind_list &&
791 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
792 conn->case_sensitive)) {
793 fsp->aio_write_behind = True;
794 }
795
796 fsp->wcp = NULL; /* Write cache pointer. */
797
798 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
799 conn->session_info->unix_info->unix_name,
800 smb_fname_str_dbg(smb_fname),
801 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
802 conn->num_files_open));
803
804 errno = 0;
805 return NT_STATUS_OK;
806 }
807
808 /****************************************************************************
809 Check if we can open a file with a share mode.
810 Returns True if conflict, False if not.
811 ****************************************************************************/
812
813 static bool share_conflict(struct share_mode_entry *entry,
814 uint32 access_mask,
815 uint32 share_access)
816 {
817 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
818 "entry->share_access = 0x%x, "
819 "entry->private_options = 0x%x\n",
820 (unsigned int)entry->access_mask,
821 (unsigned int)entry->share_access,
822 (unsigned int)entry->private_options));
823
824 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
825 (unsigned int)access_mask, (unsigned int)share_access));
826
827 if ((entry->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 "entry->access_mask = 0x%x\n",
834 (unsigned int)entry->access_mask ));
835 return False;
836 }
837
838 if ((access_mask & (FILE_WRITE_DATA|
839 FILE_APPEND_DATA|
840 FILE_READ_DATA|
841 FILE_EXECUTE|
842 DELETE_ACCESS)) == 0) {
843 DEBUG(10,("share_conflict: No conflict due to "
844 "access_mask = 0x%x\n",
845 (unsigned int)access_mask ));
846 return False;
847 }
848
849 #if 1 /* JRA TEST - Superdebug. */
850 #define CHECK_MASK(num, am, right, sa, share) \
851 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
852 (unsigned int)(num), (unsigned int)(am), \
853 (unsigned int)(right), (unsigned int)(am)&(right) )); \
854 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
855 (unsigned int)(num), (unsigned int)(sa), \
856 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
857 if (((am) & (right)) && !((sa) & (share))) { \
858 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
859 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
860 (unsigned int)(share) )); \
861 return True; \
862 }
863 #else
864 #define CHECK_MASK(num, am, right, sa, share) \
865 if (((am) & (right)) && !((sa) & (share))) { \
866 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
867 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
868 (unsigned int)(share) )); \
869 return True; \
870 }
871 #endif
872
873 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
874 share_access, FILE_SHARE_WRITE);
875 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
876 entry->share_access, FILE_SHARE_WRITE);
877
878 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
879 share_access, FILE_SHARE_READ);
880 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
881 entry->share_access, FILE_SHARE_READ);
882
883 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
884 share_access, FILE_SHARE_DELETE);
885 CHECK_MASK(6, access_mask, DELETE_ACCESS,
886 entry->share_access, FILE_SHARE_DELETE);
887
888 DEBUG(10,("share_conflict: No conflict.\n"));
889 return False;
890 }
891
892 #if defined(DEVELOPER)
893 static void validate_my_share_entries(struct smbd_server_connection *sconn,
894 int num,
895 struct share_mode_entry *share_entry)
896 {
897 files_struct *fsp;
898
899 if (!procid_is_me(&share_entry->pid)) {
900 return;
901 }
902
903 if (is_deferred_open_entry(share_entry) &&
904 !open_was_deferred(sconn, share_entry->op_mid)) {
905 char *str = talloc_asprintf(talloc_tos(),
906 "Got a deferred entry without a request: "
907 "PANIC: %s\n",
908 share_mode_str(talloc_tos(), num, share_entry));
909 smb_panic(str);
910 }
911
912 if (!is_valid_share_mode_entry(share_entry)) {
913 return;
914 }
915
916 fsp = file_find_dif(sconn, share_entry->id,
917 share_entry->share_file_id);
918 if (!fsp) {
919 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
920 share_mode_str(talloc_tos(), num, share_entry) ));
921 smb_panic("validate_my_share_entries: Cannot match a "
922 "share entry with an open file\n");
923 }
924
925 if (is_deferred_open_entry(share_entry) ||
926 is_unused_share_mode_entry(share_entry)) {
927 goto panic;
928 }
929
930 if ((share_entry->op_type == NO_OPLOCK) &&
931 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
932 /* Someone has already written to it, but I haven't yet
933 * noticed */
934 return;
935 }
936
937 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
938 goto panic;
939 }
940
941 return;
942
943 panic:
944 {
945 char *str;
946 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
947 share_mode_str(talloc_tos(), num, share_entry) ));
948 str = talloc_asprintf(talloc_tos(),
949 "validate_my_share_entries: "
950 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
951 fsp->fsp_name->base_name,
952 (unsigned int)fsp->oplock_type,
953 (unsigned int)share_entry->op_type );
954 smb_panic(str);
955 }
956 }
957 #endif
958
959 bool is_stat_open(uint32 access_mask)
960 {
961 return (access_mask &&
962 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
963 FILE_WRITE_ATTRIBUTES))==0) &&
964 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
965 FILE_WRITE_ATTRIBUTES)) != 0));
966 }
967
968 /****************************************************************************
969 Deal with share modes
970 Invarient: Share mode must be locked on entry and exit.
971 Returns -1 on error, or number of share modes on success (may be zero).
972 ****************************************************************************/
973
974 static NTSTATUS open_mode_check(connection_struct *conn,
975 struct share_mode_lock *lck,
976 uint32_t name_hash,
977 uint32 access_mask,
978 uint32 share_access,
979 uint32 create_options,
980 bool *file_existed)
981 {
982 int i;
983
984 if(lck->num_share_modes == 0) {
985 return NT_STATUS_OK;
986 }
987
988 *file_existed = True;
989
990 /* A delete on close prohibits everything */
991
992 if (is_delete_on_close_set(lck, name_hash)) {
993 return NT_STATUS_DELETE_PENDING;
994 }
995
996 if (is_stat_open(access_mask)) {
997 /* Stat open that doesn't trigger oplock breaks or share mode
998 * checks... ! JRA. */
999 return NT_STATUS_OK;
1000 }
1001
1002 /*
1003 * Check if the share modes will give us access.
1004 */
1005
1006 #if defined(DEVELOPER)
1007 for(i = 0; i < lck->num_share_modes; i++) {
1008 validate_my_share_entries(conn->sconn, i,
1009 &lck->share_modes[i]);
1010 }
1011 #endif
1012
1013 if (!lp_share_modes(SNUM(conn))) {
1014 return NT_STATUS_OK;
1015 }
1016
1017 /* Now we check the share modes, after any oplock breaks. */
1018 for(i = 0; i < lck->num_share_modes; i++) {
1019
1020 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1021 continue;
1022 }
1023
1024 /* someone else has a share lock on it, check to see if we can
1025 * too */
1026 if (share_conflict(&lck->share_modes[i],
1027 access_mask, share_access)) {
1028 return NT_STATUS_SHARING_VIOLATION;
1029 }
1030 }
1031
1032 return NT_STATUS_OK;
1033 }
1034
1035 static bool is_delete_request(files_struct *fsp) {
1036 return ((fsp->access_mask == DELETE_ACCESS) &&
1037 (fsp->oplock_type == NO_OPLOCK));
1038 }
1039
1040 /*
1041 * Send a break message to the oplock holder and delay the open for
1042 * our client.
1043 */
1044
1045 static NTSTATUS send_break_message(files_struct *fsp,
1046 struct share_mode_entry *exclusive,
1047 uint64_t mid,
1048 int oplock_request)
1049 {
1050 NTSTATUS status;
1051 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1052
1053 DEBUG(10, ("Sending break request to PID %s\n",
1054 procid_str_static(&exclusive->pid)));
1055 exclusive->op_mid = mid;
1056
1057 /* Create the message. */
1058 share_mode_entry_to_message(msg, exclusive);
1059
1060 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1061 don't want this set in the share mode struct pointed to by lck. */
1062
1063 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1064 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1065 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1066 }
1067
1068 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1069 MSG_SMB_BREAK_REQUEST,
1070 (uint8 *)msg,
1071 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1072 if (!NT_STATUS_IS_OK(status)) {
1073 DEBUG(3, ("Could not send oplock break message: %s\n",
1074 nt_errstr(status)));
1075 }
1076
1077 return status;
1078 }
1079
1080 /*
1081 * Return share_mode_entry pointers for :
1082 * 1). Batch oplock entry.
1083 * 2). Batch or exclusive oplock entry (may be identical to #1).
1084 * bool have_level2_oplock
1085 * bool have_no_oplock.
1086 * Do internal consistency checks on the share mode for a file.
1087 */
1088
1089 static void find_oplock_types(files_struct *fsp,
1090 int oplock_request,
1091 struct share_mode_lock *lck,
1092 struct share_mode_entry **pp_batch,
1093 struct share_mode_entry **pp_ex_or_batch,
1094 bool *got_level2,
1095 bool *got_no_oplock)
1096 {
1097 int i;
1098
1099 *pp_batch = NULL;
1100 *pp_ex_or_batch = NULL;
1101 *got_level2 = false;
1102 *got_no_oplock = false;
1103
1104 /* Ignore stat or internal opens, as is done in
1105 delay_for_batch_oplocks() and
1106 delay_for_exclusive_oplocks().
1107 */
1108 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1109 return;
1110 }
1111
1112 for (i=0; i<lck->num_share_modes; i++) {
1113 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1114 continue;
1115 }
1116
1117 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1118 is_stat_open(lck->share_modes[i].access_mask)) {
1119 /* We ignore stat opens in the table - they
1120 always have NO_OPLOCK and never get or
1121 cause breaks. JRA. */
1122 continue;
1123 }
1124
1125 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1126 /* batch - can only be one. */
1127 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1128 smb_panic("Bad batch oplock entry.");
1129 }
1130 *pp_batch = &lck->share_modes[i];
1131 }
1132
1133 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1134 /* Exclusive or batch - can only be one. */
1135 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1136 smb_panic("Bad exclusive or batch oplock entry.");
1137 }
1138 *pp_ex_or_batch = &lck->share_modes[i];
1139 }
1140
1141 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1142 if (*pp_batch || *pp_ex_or_batch) {
1143 smb_panic("Bad levelII oplock entry.");
1144 }
1145 *got_level2 = true;
1146 }
1147
1148 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1149 if (*pp_batch || *pp_ex_or_batch) {
1150 smb_panic("Bad no oplock entry.");
1151 }
1152 *got_no_oplock = true;
1153 }
1154 }
1155 }
1156
1157 static bool delay_for_batch_oplocks(files_struct *fsp,
1158 uint64_t mid,
1159 int oplock_request,
1160 struct share_mode_entry *batch_entry)
1161 {
1162 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1163 return false;
1164 }
1165
1166 if (batch_entry != NULL) {
1167 /* Found a batch oplock */
1168 send_break_message(fsp, batch_entry, mid, oplock_request);
1169 return true;
1170 }
1171 return false;
1172 }
1173
1174 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1175 uint64_t mid,
1176 int oplock_request,
1177 struct share_mode_entry *ex_entry)
1178 {
1179 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1180 return false;
1181 }
1182
1183 if (ex_entry != NULL) {
1184 /* Found an exclusive or batch oplock */
1185 bool delay_it = is_delete_request(fsp) ?
1186 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1187 if (delay_it) {
1188 send_break_message(fsp, ex_entry, mid, oplock_request);
1189 return true;
1190 }
1191 }
1192 return false;
1193 }
1194
1195 static void grant_fsp_oplock_type(files_struct *fsp,
1196 const struct byte_range_lock *br_lck,
1197 int oplock_request,
1198 bool got_level2_oplock,
1199 bool got_a_none_oplock)
1200 {
1201 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1202 lp_level2_oplocks(SNUM(fsp->conn));
1203
1204 /* Start by granting what the client asked for,
1205 but ensure no SAMBA_PRIVATE bits can be set. */
1206 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1207
1208 if (oplock_request & INTERNAL_OPEN_ONLY) {
1209 /* No oplocks on internal open. */
1210 fsp->oplock_type = NO_OPLOCK;
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 } else if (br_lck && br_lck->num_locks > 0) {
1215 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1216 fsp_str_dbg(fsp)));
1217 fsp->oplock_type = NO_OPLOCK;
1218 }
1219
1220 if (is_stat_open(fsp->access_mask)) {
1221 /* Leave the value already set. */
1222 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1223 fsp->oplock_type, fsp_str_dbg(fsp)));
1224 return;
1225 }
1226
1227 /*
1228 * Match what was requested (fsp->oplock_type) with
1229 * what was found in the existing share modes.
1230 */
1231
1232 if (got_a_none_oplock) {
1233 fsp->oplock_type = NO_OPLOCK;
1234 } else if (got_level2_oplock) {
1235 if (fsp->oplock_type == NO_OPLOCK ||
1236 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1237 /* Store a level2 oplock, but don't tell the client */
1238 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1239 } else {
1240 fsp->oplock_type = LEVEL_II_OPLOCK;
1241 }
1242 } else {
1243 /* All share_mode_entries are placeholders or deferred.
1244 * Silently upgrade to fake levelII if the client didn't
1245 * ask for an oplock. */
1246 if (fsp->oplock_type == NO_OPLOCK) {
1247 /* Store a level2 oplock, but don't tell the client */
1248 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1249 }
1250 }
1251
1252 /*
1253 * Don't grant level2 to clients that don't want them
1254 * or if we've turned them off.
1255 */
1256 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1257 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1258 }
1259
1260 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1261 fsp->oplock_type, fsp_str_dbg(fsp)));
1262 }
1263
1264 bool request_timed_out(struct timeval request_time,
1265 struct timeval timeout)
1266 {
1267 struct timeval now, end_time;
1268 GetTimeOfDay(&now);
1269 end_time = timeval_sum(&request_time, &timeout);
1270 return (timeval_compare(&end_time, &now) < 0);
1271 }
1272
1273 /****************************************************************************
1274 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1275 ****************************************************************************/
1276
1277 static void defer_open(struct share_mode_lock *lck,
1278 struct timeval request_time,
1279 struct timeval timeout,
1280 struct smb_request *req,
1281 struct deferred_open_record *state)
1282 {
1283 int i;
1284
1285 /* Paranoia check */
1286
1287 for (i=0; i<lck->num_share_modes; i++) {
1288 struct share_mode_entry *e = &lck->share_modes[i];
1289
1290 if (!is_deferred_open_entry(e)) {
1291 continue;
1292 }
1293
1294 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1295 DEBUG(0, ("Trying to defer an already deferred "
1296 "request: mid=%llu, exiting\n",
1297 (unsigned long long)req->mid));
1298 exit_server("attempt to defer a deferred request");
1299 }
1300 }
1301
1302 /* End paranoia check */
1303
1304 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1305 "open entry for mid %llu\n",
1306 (unsigned int)request_time.tv_sec,
1307 (unsigned int)request_time.tv_usec,
1308 (unsigned long long)req->mid));
1309
1310 if (!push_deferred_open_message_smb(req, request_time, timeout,
1311 state->id, (char *)state, sizeof(*state))) {
1312 exit_server("push_deferred_open_message_smb failed");
1313 }
1314 add_deferred_open(lck, req->mid, request_time,
1315 sconn_server_id(req->sconn), state->id);
1316 }
1317
1318
1319 /****************************************************************************
1320 On overwrite open ensure that the attributes match.
1321 ****************************************************************************/
1322
1323 bool open_match_attributes(connection_struct *conn,
1324 uint32 old_dos_attr,
1325 uint32 new_dos_attr,
1326 mode_t existing_unx_mode,
1327 mode_t new_unx_mode,
1328 mode_t *returned_unx_mode)
1329 {
1330 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1331
1332 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1333 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1334
1335 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1336 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1337 *returned_unx_mode = new_unx_mode;
1338 } else {
1339 *returned_unx_mode = (mode_t)0;
1340 }
1341
1342 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1343 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1344 "returned_unx_mode = 0%o\n",
1345 (unsigned int)old_dos_attr,
1346 (unsigned int)existing_unx_mode,
1347 (unsigned int)new_dos_attr,
1348 (unsigned int)*returned_unx_mode ));
1349
1350 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1351 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1352 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1353 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1354 return False;
1355 }
1356 }
1357 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1358 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1359 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1360 return False;
1361 }
1362 }
1363 return True;
1364 }
1365
1366 /****************************************************************************
1367 Special FCB or DOS processing in the case of a sharing violation.
1368 Try and find a duplicated file handle.
1369 ****************************************************************************/
1370
1371 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1372 connection_struct *conn,
1373 files_struct *fsp_to_dup_into,
1374 const struct smb_filename *smb_fname,
1375 struct file_id id,
1376 uint16 file_pid,
1377 uint16 vuid,
1378 uint32 access_mask,
1379 uint32 share_access,
1380 uint32 create_options)
1381 {
1382 files_struct *fsp;
1383
1384 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1385 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1386
1387 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1388 fsp = file_find_di_next(fsp)) {
1389
1390 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1391 "vuid = %u, file_pid = %u, private_options = 0x%x "
1392 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1393 fsp->fh->fd, (unsigned int)fsp->vuid,
1394 (unsigned int)fsp->file_pid,
1395 (unsigned int)fsp->fh->private_options,
1396 (unsigned int)fsp->access_mask ));
1397
1398 if (fsp->fh->fd != -1 &&
1399 fsp->vuid == vuid &&
1400 fsp->file_pid == file_pid &&
1401 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1402 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1403 (fsp->access_mask & FILE_WRITE_DATA) &&
1404 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1405 strequal(fsp->fsp_name->stream_name,
1406 smb_fname->stream_name)) {
1407 DEBUG(10,("fcb_or_dos_open: file match\n"));
1408 break;
1409 }
1410 }
1411
1412 if (!fsp) {
1413 return NT_STATUS_NOT_FOUND;
1414 }
1415
1416 /* quite an insane set of semantics ... */
1417 if (is_executable(smb_fname->base_name) &&
1418 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1419 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1420 return NT_STATUS_INVALID_PARAMETER;
1421 }
1422
1423 /* We need to duplicate this fsp. */
1424 return dup_file_fsp(req, fsp, access_mask, share_access,
1425 create_options, fsp_to_dup_into);
1426 }
1427
1428 static void schedule_defer_open(struct share_mode_lock *lck,
1429 struct timeval request_time,
1430 struct smb_request *req)
1431 {
1432 struct deferred_open_record state;
1433
1434 /* This is a relative time, added to the absolute
1435 request_time value to get the absolute timeout time.
1436 Note that if this is the second or greater time we enter
1437 this codepath for this particular request mid then
1438 request_time is left as the absolute time of the *first*
1439 time this request mid was processed. This is what allows
1440 the request to eventually time out. */
1441
1442 struct timeval timeout;
1443
1444 /* Normally the smbd we asked should respond within
1445 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1446 * the client did, give twice the timeout as a safety
1447 * measure here in case the other smbd is stuck
1448 * somewhere else. */
1449
1450 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1451
1452 /* Nothing actually uses state.delayed_for_oplocks
1453 but it's handy to differentiate in debug messages
1454 between a 30 second delay due to oplock break, and
1455 a 1 second delay for share mode conflicts. */
1456
1457 state.delayed_for_oplocks = True;
1458 state.id = lck->id;
1459
1460 if (!request_timed_out(request_time, timeout)) {
1461 defer_open(lck, request_time, timeout, req, &state);
1462 }
1463 }
1464
1465 /****************************************************************************
1466 Work out what access_mask to use from what the client sent us.
1467 ****************************************************************************/
1468
1469 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1470 const struct smb_filename *smb_fname,
1471 bool file_existed,
1472 uint32_t access_mask,
1473 uint32_t *access_mask_out)
1474 {
1475 NTSTATUS status;
1476 uint32_t orig_access_mask = access_mask;
1477 uint32_t rejected_share_access;
1478
1479 /*
1480 * Convert GENERIC bits to specific bits.
1481 */
1482
1483 se_map_generic(&access_mask, &file_generic_mapping);
1484
1485 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1486 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1487 if (get_current_uid(conn) == (uid_t)0) {
1488 access_mask |= FILE_GENERIC_ALL;
1489 } else if (file_existed) {
1490
1491 struct security_descriptor *sd;
1492 uint32_t access_granted = 0;
1493
1494 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1495 (SECINFO_OWNER |
1496 SECINFO_GROUP |
1497 SECINFO_DACL),&sd);
1498
1499 if (!NT_STATUS_IS_OK(status)) {
1500 DEBUG(10,("smbd_calculate_access_mask: "
1501 "Could not get acl on file %s: %s\n",
1502 smb_fname_str_dbg(smb_fname),
1503 nt_errstr(status)));
1504 return NT_STATUS_ACCESS_DENIED;
1505 }
1506
1507 status = smb1_file_se_access_check(conn,
1508 sd,
1509 get_current_nttok(conn),
1510 access_mask,
1511 &access_granted);
1512
1513 TALLOC_FREE(sd);
1514
1515 if (!NT_STATUS_IS_OK(status)) {
1516 DEBUG(10, ("smbd_calculate_access_mask: "
1517 "Access denied on file %s: "
1518 "when calculating maximum access\n",
1519 smb_fname_str_dbg(smb_fname)));
1520 return NT_STATUS_ACCESS_DENIED;
1521 }
1522
1523 access_mask = access_granted;
1524 } else {
1525 access_mask = FILE_GENERIC_ALL;
1526 }
1527
1528 access_mask &= conn->share_access;
1529 }
1530
1531 rejected_share_access = access_mask & ~(conn->share_access);
1532
1533 if (rejected_share_access) {
1534 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1535 "file %s: rejected by share access mask[0x%08X] "
1536 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1537 smb_fname_str_dbg(smb_fname),
1538 conn->share_access,
1539 orig_access_mask, access_mask,
1540 rejected_share_access));
1541 return NT_STATUS_ACCESS_DENIED;
1542 }
1543
1544 *access_mask_out = access_mask;
1545 return NT_STATUS_OK;
1546 }
1547
1548 /****************************************************************************
1549 Remove the deferred open entry under lock.
1550 ****************************************************************************/
1551
1552 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1553 struct server_id pid)
1554 {
1555 struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1556 NULL, NULL, NULL);
1557 if (lck == NULL) {
1558 DEBUG(0, ("could not get share mode lock\n"));
1559 } else {
1560 del_deferred_open_entry(lck, mid, pid);
1561 TALLOC_FREE(lck);
1562 }
1563 }
1564
1565 /****************************************************************
1566 Ensure we get the brlock lock followed by the share mode lock
1567 in the correct order to prevent deadlocks if other smbd's are
1568 using the brlock database on this file simultaneously with this open
1569 (that code also gets the locks in brlock -> share mode lock order).
1570 ****************************************************************/
1571
1572 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1573 files_struct *fsp,
1574 const struct file_id id,
1575 const char *connectpath,
1576 const struct smb_filename *smb_fname,
1577 const struct timespec *p_old_write_time,
1578 struct share_mode_lock **p_lck,
1579 struct byte_range_lock **p_br_lck)
1580 {
1581 /* Ordering - we must get the br_lck for this
1582 file before the share mode. */
1583 if (lp_locking(fsp->conn->params)) {
1584 *p_br_lck = brl_get_locks_readonly(fsp);
1585 if (*p_br_lck == NULL) {
1586 DEBUG(0, ("Could not get br_lock\n"));
1587 return false;
1588 }
1589 /* Note - we don't need to free the returned
1590 br_lck explicitly as it was allocated on talloc_tos()
1591 and so will be autofreed (and release the lock)
1592 once the frame context disappears.
1593
1594 If it was set to fsp->brlock_rec then it was
1595 talloc_move'd to hang off the fsp pointer and
1596 in this case is guarenteed to not be holding the
1597 lock on the brlock database. */
1598 }
1599
1600 *p_lck = get_share_mode_lock(mem_ctx,
1601 id,
1602 connectpath,
1603 smb_fname,
1604 p_old_write_time);
1605
1606 if (*p_lck == NULL) {
1607 DEBUG(0, ("Could not get share mode lock\n"));
1608 TALLOC_FREE(*p_br_lck);
1609 return false;
1610 }
1611 return true;
1612 }
1613
1614 /****************************************************************************
1615 Open a file with a share mode. Passed in an already created files_struct *.
1616 ****************************************************************************/
1617
1618 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1619 struct smb_request *req,
1620 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1621 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1622 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1623 uint32 create_options, /* options such as delete on close. */
1624 uint32 new_dos_attributes, /* attributes used for new file. */
1625 int oplock_request, /* internal Samba oplock codes. */
1626 /* Information (FILE_EXISTS etc.) */
1627 uint32_t private_flags, /* Samba specific flags. */
1628 int *pinfo,
1629 files_struct *fsp)
1630 {
1631 struct smb_filename *smb_fname = fsp->fsp_name;
1632 int flags=0;
1633 int flags2=0;
1634 bool file_existed = VALID_STAT(smb_fname->st);
1635 bool def_acl = False;
1636 bool posix_open = False;
1637 bool new_file_created = False;
1638 bool clear_ads = false;
1639 struct file_id id;
1640 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1641 mode_t new_unx_mode = (mode_t)0;
1642 mode_t unx_mode = (mode_t)0;
1643 int info;
1644 uint32 existing_dos_attributes = 0;
1645 struct timeval request_time = timeval_zero();
1646 struct share_mode_lock *lck = NULL;
1647 uint32 open_access_mask = access_mask;
1648 NTSTATUS status;
1649 char *parent_dir;
1650
1651 ZERO_STRUCT(id);
1652
1653 if (conn->printer) {
1654 /*
1655 * Printers are handled completely differently.
1656 * Most of the passed parameters are ignored.
1657 */
1658
1659 if (pinfo) {
1660 *pinfo = FILE_WAS_CREATED;
1661 }
1662
1663 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1664 smb_fname_str_dbg(smb_fname)));
1665
1666 if (!req) {
1667 DEBUG(0,("open_file_ntcreate: printer open without "
1668 "an SMB request!\n"));
1669 return NT_STATUS_INTERNAL_ERROR;
1670 }
1671
1672 return print_spool_open(fsp, smb_fname->base_name,
1673 req->vuid);
1674 }
1675
1676 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1677 NULL)) {
1678 return NT_STATUS_NO_MEMORY;
1679 }
1680
1681 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1682 posix_open = True;
1683 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1684 new_dos_attributes = 0;
1685 } else {
1686 /* Windows allows a new file to be created and
1687 silently removes a FILE_ATTRIBUTE_DIRECTORY
1688 sent by the client. Do the same. */
1689
1690 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1691
1692 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1693 * created new. */
1694 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1695 smb_fname, parent_dir);
1696 }
1697
1698 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1699 "access_mask=0x%x share_access=0x%x "
1700 "create_disposition = 0x%x create_options=0x%x "
1701 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1702 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1703 access_mask, share_access, create_disposition,
1704 create_options, (unsigned int)unx_mode, oplock_request,
1705 (unsigned int)private_flags));
1706
1707 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1708 DEBUG(0, ("No smb request but not an internal only open!\n"));
1709 return NT_STATUS_INTERNAL_ERROR;
1710 }
1711
1712 /*
1713 * Only non-internal opens can be deferred at all
1714 */
1715
1716 if (req) {
1717 void *ptr;
1718 if (get_deferred_open_message_state(req,
1719 &request_time,
1720 &ptr)) {
1721
1722 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1723 /* Remember the absolute time of the original
1724 request with this mid. We'll use it later to
1725 see if this has timed out. */
1726
1727 /* Remove the deferred open entry under lock. */
1728 remove_deferred_open_entry(
1729 state->id, req->mid,
1730 sconn_server_id(req->sconn));
1731
1732 /* Ensure we don't reprocess this message. */
1733 remove_deferred_open_message_smb(req->sconn, req->mid);
1734 }
1735 }
1736
1737 status = check_name(conn, smb_fname->base_name);
1738 if (!NT_STATUS_IS_OK(status)) {
1739 return status;
1740 }
1741
1742 if (!posix_open) {
1743 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1744 if (file_existed) {
1745 existing_dos_attributes = dos_mode(conn, smb_fname);
1746 }
1747 }
1748
1749 /* ignore any oplock requests if oplocks are disabled */
1750 if (!lp_oplocks(SNUM(conn)) ||
1751 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1752 /* Mask off everything except the private Samba bits. */
1753 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1754 }
1755
1756 /* this is for OS/2 long file names - say we don't support them */
1757 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1758 /* OS/2 Workplace shell fix may be main code stream in a later
1759 * release. */
1760 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1761 "supported.\n"));
1762 if (use_nt_status()) {
1763 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1764 }
1765 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1766 }
1767
1768 switch( create_disposition ) {
1769 /*
1770 * Currently we're using FILE_SUPERSEDE as the same as
1771 * FILE_OVERWRITE_IF but they really are
1772 * different. FILE_SUPERSEDE deletes an existing file
1773 * (requiring delete access) then recreates it.
1774 */
1775 case FILE_SUPERSEDE:
1776 /* If file exists replace/overwrite. If file doesn't
1777 * exist create. */
1778 flags2 |= (O_CREAT | O_TRUNC);
1779 clear_ads = true;
1780 break;
1781
1782 case FILE_OVERWRITE_IF:
1783 /* If file exists replace/overwrite. If file doesn't
1784 * exist create. */
1785 flags2 |= (O_CREAT | O_TRUNC);
1786 clear_ads = true;
1787 break;
1788
1789 case FILE_OPEN:
1790 /* If file exists open. If file doesn't exist error. */
1791 if (!file_existed) {
1792 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1793 "requested for file %s and file "
1794 "doesn't exist.\n",
1795 smb_fname_str_dbg(smb_fname)));
1796 errno = ENOENT;
1797 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1798 }
1799 break;
1800
1801 case FILE_OVERWRITE:
1802 /* If file exists overwrite. If file doesn't exist
1803 * error. */
1804 if (!file_existed) {
1805 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1806 "requested for file %s and file "
1807 "doesn't exist.\n",
1808 smb_fname_str_dbg(smb_fname) ));
1809 errno = ENOENT;
1810 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1811 }
1812 flags2 |= O_TRUNC;
1813 clear_ads = true;
1814 break;
1815
1816 case FILE_CREATE:
1817 /* If file exists error. If file doesn't exist
1818 * create. */
1819 if (file_existed) {
1820 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1821 "requested for file %s and file "
1822 "already exists.\n",
1823 smb_fname_str_dbg(smb_fname)));
1824 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1825 errno = EISDIR;
1826 } else {
1827 errno = EEXIST;
1828 }
1829 return map_nt_error_from_unix(errno);
1830 }
1831 flags2 |= (O_CREAT|O_EXCL);
1832 break;
1833
1834 case FILE_OPEN_IF:
1835 /* If file exists open. If file doesn't exist
1836 * create. */
1837 flags2 |= O_CREAT;
1838 break;
1839
1840 default:
1841 return NT_STATUS_INVALID_PARAMETER;
1842 }
1843
1844 /* We only care about matching attributes on file exists and
1845 * overwrite. */
1846
1847 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1848 (create_disposition == FILE_OVERWRITE_IF))) {
1849 if (!open_match_attributes(conn, existing_dos_attributes,
1850 new_dos_attributes,
1851 smb_fname->st.st_ex_mode,
1852 unx_mode, &new_unx_mode)) {
1853 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1854 "for file %s (%x %x) (0%o, 0%o)\n",
1855 smb_fname_str_dbg(smb_fname),
1856 existing_dos_attributes,
1857 new_dos_attributes,
1858 (unsigned int)smb_fname->st.st_ex_mode,
1859 (unsigned int)unx_mode ));
1860 errno = EACCES;
1861 return NT_STATUS_ACCESS_DENIED;
1862 }
1863 }
1864
1865 status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1866 access_mask,
1867 &access_mask);
1868 if (!NT_STATUS_IS_OK(status)) {
1869 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1870 "on file %s returned %s\n",
1871 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1872 return status;
1873 }
1874
1875 open_access_mask = access_mask;
1876
1877 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1878 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1879 }
1880
1881 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1882 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1883 access_mask));
1884
1885 /*
1886 * Note that we ignore the append flag as append does not
1887 * mean the same thing under DOS and Unix.
1888 */
1889
1890 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1891 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1892 /* DENY_DOS opens are always underlying read-write on the
1893 file handle, no matter what the requested access mask
1894 says. */
1895 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1896 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1897 flags = O_RDWR;
1898 } else {
1899 flags = O_WRONLY;
1900 }
1901 } else {
1902 flags = O_RDONLY;
1903 }
1904
1905 /*
1906 * Currently we only look at FILE_WRITE_THROUGH for create options.
1907 */
1908
1909 #if defined(O_SYNC)
1910 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1911 flags2 |= O_SYNC;
1912 }
1913 #endif /* O_SYNC */
1914
1915 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1916 flags2 |= O_APPEND;
1917 }
1918
1919 if (!posix_open && !CAN_WRITE(conn)) {
1920 /*
1921 * We should really return a permission denied error if either
1922 * O_CREAT or O_TRUNC are set, but for compatibility with
1923 * older versions of Samba we just AND them out.
1924 */
1925 flags2 &= ~(O_CREAT|O_TRUNC);
1926 }
1927
1928 /*
1929 * Ensure we can't write on a read-only share or file.
1930 */
1931
1932 if (flags != O_RDONLY && file_existed &&
1933 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1934 DEBUG(5,("open_file_ntcreate: write access requested for "
1935 "file %s on read only %s\n",
1936 smb_fname_str_dbg(smb_fname),
1937 !CAN_WRITE(conn) ? "share" : "file" ));
1938 errno = EACCES;
1939 return NT_STATUS_ACCESS_DENIED;
1940 }
1941
1942 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1943 fsp->share_access = share_access;
1944 fsp->fh->private_options = private_flags;
1945 fsp->access_mask = open_access_mask; /* We change this to the
1946 * requested access_mask after
1947 * the open is done. */
1948 fsp->posix_open = posix_open;
1949
1950 /* Ensure no SAMBA_PRIVATE bits can be set. */
1951 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1952
1953 if (timeval_is_zero(&request_time)) {
1954 request_time = fsp->open_time;
1955 }
1956
1957 if (file_existed) {
1958 struct byte_range_lock *br_lck = NULL;
1959 struct share_mode_entry *batch_entry = NULL;
1960 struct share_mode_entry *exclusive_entry = NULL;
1961 bool got_level2_oplock = false;
1962 bool got_a_none_oplock = false;
1963
1964 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1965 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1966
1967 if (!acquire_ordered_locks(talloc_tos(),
1968 fsp,
1969 id,
1970 conn->connectpath,
1971 smb_fname,
1972 &old_write_time,
1973 &lck,
1974 &br_lck)) {
1975 return NT_STATUS_SHARING_VIOLATION;
1976 }
1977
1978 /* Get the types we need to examine. */
1979 find_oplock_types(fsp,
1980 oplock_request,
1981 lck,
1982 &batch_entry,
1983 &exclusive_entry,
1984 &got_level2_oplock,
1985 &got_a_none_oplock);
1986
1987 /* First pass - send break only on batch oplocks. */
1988 if ((req != NULL) &&
1989 delay_for_batch_oplocks(fsp,
1990 req->mid,
1991 oplock_request,
1992 batch_entry)) {
1993 schedule_defer_open(lck, request_time, req);
1994 TALLOC_FREE(lck);
1995 return NT_STATUS_SHARING_VIOLATION;
1996 }
1997
1998 /* Use the client requested access mask here, not the one we
1999 * open with. */
2000 status = open_mode_check(conn, lck, fsp->name_hash,
2001 access_mask, share_access,
2002 create_options, &file_existed);
2003
2004 if (NT_STATUS_IS_OK(status)) {
2005 /* We might be going to allow this open. Check oplock
2006 * status again. */
2007 /* Second pass - send break for both batch or
2008 * exclusive oplocks. */
2009 if ((req != NULL) &&
2010 delay_for_exclusive_oplocks(
2011 fsp,
2012 req->mid,
2013 oplock_request,
2014 exclusive_entry)) {
2015 schedule_defer_open(lck, request_time, req);
2016 TALLOC_FREE(lck);
2017 return NT_STATUS_SHARING_VIOLATION;
2018 }
2019 }
2020
2021 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2022 /* DELETE_PENDING is not deferred for a second */
2023 TALLOC_FREE(lck);
2024 return status;
2025 }
2026
2027 grant_fsp_oplock_type(fsp,
2028 br_lck,
2029 oplock_request,
2030 got_level2_oplock,
2031 got_a_none_oplock);
2032
2033 if (!NT_STATUS_IS_OK(status)) {
2034 uint32 can_access_mask;
2035 bool can_access = True;
2036
2037 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2038
2039 /* Check if this can be done with the deny_dos and fcb
2040 * calls. */
2041 if (private_flags &
2042 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2043 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2044 if (req == NULL) {
2045 DEBUG(0, ("DOS open without an SMB "
2046 "request!\n"));
2047 TALLOC_FREE(lck);
2048 return NT_STATUS_INTERNAL_ERROR;
2049 }
2050
2051 /* Use the client requested access mask here,
2052 * not the one we open with. */
2053 status = fcb_or_dos_open(req,
2054 conn,
2055 fsp,
2056 smb_fname,
2057 id,
2058 req->smbpid,
2059 req->vuid,
2060 access_mask,
2061 share_access,
2062 create_options);
2063
2064 if (NT_STATUS_IS_OK(status)) {
2065 TALLOC_FREE(lck);
2066 if (pinfo) {
2067 *pinfo = FILE_WAS_OPENED;
2068 }
2069 return NT_STATUS_OK;
2070 }
2071 }
2072
2073 /*
2074 * This next line is a subtlety we need for
2075 * MS-Access. If a file open will fail due to share
2076 * permissions and also for security (access) reasons,
2077 * we need to return the access failed error, not the
2078 * share error. We can't open the file due to kernel
2079 * oplock deadlock (it's possible we failed above on
2080 * the open_mode_check()) so use a userspace check.
2081 */
2082
2083 if (flags & O_RDWR) {
2084 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2085 } else if (flags & O_WRONLY) {
2086 can_access_mask = FILE_WRITE_DATA;
2087 } else {
2088 can_access_mask = FILE_READ_DATA;
2089 }
2090
2091 if (((can_access_mask & FILE_WRITE_DATA) &&
2092 !CAN_WRITE(conn)) ||
2093 !can_access_file_data(conn, smb_fname,
2094 can_access_mask)) {
2095 can_access = False;
2096 }
2097
2098 /*
2099 * If we're returning a share violation, ensure we
2100 * cope with the braindead 1 second delay.
2101 */
2102
2103 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2104 lp_defer_sharing_violations()) {
2105 struct timeval timeout;
2106 struct deferred_open_record state;
2107 int timeout_usecs;
2108
2109 /* this is a hack to speed up torture tests
2110 in 'make test' */
2111 timeout_usecs = lp_parm_int(SNUM(conn),
2112 "smbd","sharedelay",
2113 SHARING_VIOLATION_USEC_WAIT);
2114
2115 /* This is a relative time, added to the absolute
2116 request_time value to get the absolute timeout time.
2117 Note that if this is the second or greater time we enter
2118 this codepath for this particular request mid then
2119 request_time is left as the absolute time of the *first*
2120 time this request mid was processed. This is what allows
2121 the request to eventually time out. */
2122
2123 timeout = timeval_set(0, timeout_usecs);
2124
2125 /* Nothing actually uses state.delayed_for_oplocks
2126 but it's handy to differentiate in debug messages
2127 between a 30 second delay due to oplock break, and
2128 a 1 second delay for share mode conflicts. */
2129
2130 state.delayed_for_oplocks = False;
2131 state.id = id;
2132
2133 if ((req != NULL)
2134 && !request_timed_out(request_time,
2135 timeout)) {
2136 defer_open(lck, request_time, timeout,
2137 req, &state);
2138 }
2139 }
2140
2141 TALLOC_FREE(lck);
2142 if (can_access) {
2143 /*
2144 * We have detected a sharing violation here
2145 * so return the correct error code
2146 */
2147 status = NT_STATUS_SHARING_VIOLATION;
2148 } else {
2149 status = NT_STATUS_ACCESS_DENIED;
2150 }
2151 return status;
2152 }
2153
2154 /*
2155 * We exit this block with the share entry *locked*.....
2156 */
2157 }
2158
2159 SMB_ASSERT(!file_existed || (lck != NULL));
2160
2161 /*
2162 * Ensure we pay attention to default ACLs on directories if required.
2163 */
2164
2165 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2166 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2167 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2168 }
2169
2170 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2171 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2172 (unsigned int)flags, (unsigned int)flags2,
2173 (unsigned int)unx_mode, (unsigned int)access_mask,
2174 (unsigned int)open_access_mask));
2175
2176 /*
2177 * open_file strips any O_TRUNC flags itself.
2178 */
2179
2180 fsp_open = open_file(fsp, conn, req, parent_dir,
2181 flags|flags2, unx_mode, access_mask,
2182 open_access_mask);
2183
2184 if (!NT_STATUS_IS_OK(fsp_open)) {
2185 TALLOC_FREE(lck);
2186 return fsp_open;
2187 }
2188
2189 if (!file_existed) {
2190 struct byte_range_lock *br_lck = NULL;
2191 struct share_mode_entry *batch_entry = NULL;
2192 struct share_mode_entry *exclusive_entry = NULL;
2193 bool got_level2_oplock = false;
2194 bool got_a_none_oplock = false;
2195 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2196 /*
2197 * Deal with the race condition where two smbd's detect the
2198 * file doesn't exist and do the create at the same time. One
2199 * of them will win and set a share mode, the other (ie. this
2200 * one) should check if the requested share mode for this
2201 * create is allowed.
2202 */
2203
2204 /*
2205 * Now the file exists and fsp is successfully opened,
2206 * fsp->dev and fsp->inode are valid and should replace the
2207 * dev=0,inode=0 from a non existent file. Spotted by
2208 * Nadav Danieli <nadavd@exanet.com>. JRA.
2209 */
2210
2211 id = fsp->file_id;
2212
2213 if (!acquire_ordered_locks(talloc_tos(),
2214 fsp,
2215 id,
2216 conn->connectpath,
2217 smb_fname,
2218 &old_write_time,
2219 &lck,
2220 &br_lck)) {
2221 return NT_STATUS_SHARING_VIOLATION;
2222 }
2223
2224 /* Get the types we need to examine. */
2225 find_oplock_types(fsp,
2226 oplock_request,
2227 lck,
2228 &batch_entry,
2229 &exclusive_entry,
2230 &got_level2_oplock,
2231 &got_a_none_oplock);
2232
2233 /* First pass - send break only on batch oplocks. */
2234 if ((req != NULL) &&
2235 delay_for_batch_oplocks(fsp,
2236 req->mid,
2237 oplock_request,
2238 batch_entry)) {
2239 schedule_defer_open(lck, request_time, req);
2240 TALLOC_FREE(lck);
2241 fd_close(fsp);
2242 return NT_STATUS_SHARING_VIOLATION;
2243 }
2244
2245 status = open_mode_check(conn, lck, fsp->name_hash,
2246 access_mask, share_access,
2247 create_options, &file_existed);
2248
2249 if (NT_STATUS_IS_OK(status)) {
2250 /* We might be going to allow this open. Check oplock
2251 * status again. */
2252 /* Second pass - send break for both batch or
2253 * exclusive oplocks. */
2254 if ((req != NULL) &&
2255 delay_for_exclusive_oplocks(
2256 fsp,
2257 req->mid,
2258 oplock_request,
2259 exclusive_entry)) {
2260 schedule_defer_open(lck, request_time, req);
2261 TALLOC_FREE(lck);
2262 fd_close(fsp);
2263 return NT_STATUS_SHARING_VIOLATION;
2264 }
2265 }
2266
2267 if (!NT_STATUS_IS_OK(status)) {
2268 struct deferred_open_record state;
2269
2270 state.delayed_for_oplocks = False;
2271 state.id = id;
2272
2273 /* Do it all over again immediately. In the second
2274 * round we will find that the file existed and handle
2275 * the DELETE_PENDING and FCB cases correctly. No need
2276 * to duplicate the code here. Essentially this is a
2277 * "goto top of this function", but don't tell
2278 * anybody... */
2279
2280 if (req != NULL) {
2281 defer_open(lck, request_time, timeval_zero(),
2282 req, &state);
2283 }
2284 TALLOC_FREE(lck);
2285 fd_close(fsp);
2286 return status;
2287 }
2288
2289 grant_fsp_oplock_type(fsp,
2290 br_lck,
2291 oplock_request,
2292 got_level2_oplock,
2293 got_a_none_oplock);
2294
2295 /*
2296 * We exit this block with the share entry *locked*.....
2297 */
2298
2299 }
2300
2301 SMB_ASSERT(lck != NULL);
2302
2303 /* Delete streams if create_disposition requires it */
2304 if (file_existed && clear_ads &&
2305 !is_ntfs_stream_smb_fname(smb_fname)) {
2306 status = delete_all_streams(conn, smb_fname->base_name);
2307 if (!NT_STATUS_IS_OK(status)) {
2308 TALLOC_FREE(lck);
2309 fd_close(fsp);
2310 return status;
2311 }
2312 }
2313
2314 /* note that we ignore failure for the following. It is
2315 basically a hack for NFS, and NFS will never set one of
2316 these only read them. Nobody but Samba can ever set a deny
2317 mode and we have already checked our more authoritative
2318 locking database for permission to set this deny mode. If
2319 the kernel refuses the operations then the kernel is wrong.
2320 note that GPFS supports it as well - jmcd */
2321
2322 if (fsp->fh->fd != -1) {
2323 int ret_flock;
2324 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2325 if(ret_flock == -1 ){
2326
2327 TALLOC_FREE(lck);
2328 fd_close(fsp);
2329
2330 return NT_STATUS_SHARING_VIOLATION;
2331 }
2332 }
2333
2334 /*
2335 * At this point onwards, we can guarentee that the share entry
2336 * is locked, whether we created the file or not, and that the
2337 * deny mode is compatible with all current opens.
2338 */
2339
2340 /*
2341 * If requested, truncate the file.
2342 */
2343
2344 if (file_existed && (flags2&O_TRUNC)) {
2345 /*
2346 * We are modifing the file after open - update the stat
2347 * struct..
2348 */
2349 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2350 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2351 status = map_nt_error_from_unix(errno);
2352 TALLOC_FREE(lck);
2353 fd_close(fsp);
2354 return status;
2355 }
2356 }
2357
2358 /*
2359 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2360 * but we don't have to store this - just ignore it on access check.
2361 */
2362 if (conn->sconn->using_smb2) {
2363 /*
2364 * SMB2 doesn't return it (according to Microsoft tests).
2365 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2366 * File created with access = 0x7 (Read, Write, Delete)
2367 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2368 */
2369 fsp->access_mask = access_mask;
2370 } else {
2371 /* But SMB1 does. */
2372 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2373 }
2374
2375 if (file_existed) {
2376 /* stat opens on existing files don't get oplocks. */
2377 if (is_stat_open(open_access_mask)) {
2378 fsp->oplock_type = NO_OPLOCK;
2379 }
2380
2381 if (!(flags2 & O_TRUNC)) {
2382 info = FILE_WAS_OPENED;
2383 } else {
2384 info = FILE_WAS_OVERWRITTEN;
2385 }
2386 } else {
2387 info = FILE_WAS_CREATED;
2388 }
2389
2390 if (pinfo) {
2391 *pinfo = info;
2392 }
2393
2394 /*
2395 * Setup the oplock info in both the shared memory and
2396 * file structs.
2397 */
2398
2399 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2400 /*
2401 * Could not get the kernel oplock or there are byte-range
2402 * locks on the file.
2403 */
2404 fsp->oplock_type = NO_OPLOCK;
2405 }
2406
2407 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2408 new_file_created = True;
2409 }
2410
2411 set_share_mode(lck, fsp, get_current_uid(conn),
2412 req ? req->mid : 0,
2413 fsp->oplock_type);
2414
2415 /* Handle strange delete on close create semantics. */
2416 if (create_options & FILE_DELETE_ON_CLOSE) {
2417
2418 status = can_set_delete_on_close(fsp, new_dos_attributes);
2419
2420 if (!NT_STATUS_IS_OK(status)) {
2421 /* Remember to delete the mode we just added. */
2422 del_share_mode(lck, fsp);
2423 TALLOC_FREE(lck);
2424 fd_close(fsp);
2425 return status;
2426 }
2427 /* Note that here we set the *inital* delete on close flag,
2428 not the regular one. The magic gets handled in close. */
2429 fsp->initial_delete_on_close = True;
2430 }
2431
2432 if (new_file_created) {
2433 /* Files should be initially set as archive */
2434 if (lp_map_archive(SNUM(conn)) ||
2435 lp_store_dos_attributes(SNUM(conn))) {
2436 if (!posix_open) {
2437 if (file_set_dosmode(conn, smb_fname,
2438 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2439 parent_dir, true) == 0) {
2440 unx_mode = smb_fname->st.st_ex_mode;
2441 }
2442 }
2443 }
2444 }
2445
2446 /* Determine sparse flag. */
2447 if (posix_open) {
2448 /* POSIX opens are sparse by default. */
2449 fsp->is_sparse = true;
2450 } else {
2451 fsp->is_sparse = (file_existed &&
2452 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2453 }
2454
2455 /*
2456 * Take care of inherited ACLs on created files - if default ACL not
2457 * selected.
2458 */
2459
2460 if (!posix_open && !file_existed && !def_acl) {
2461
2462 int saved_errno = errno; /* We might get ENOSYS in the next
2463 * call.. */
2464
2465 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2466 errno == ENOSYS) {
2467 errno = saved_errno; /* Ignore ENOSYS */
2468 }
2469
2470 } else if (new_unx_mode) {
2471
2472 int ret = -1;
2473
2474 /* Attributes need changing. File already existed. */
2475
2476 {
2477 int saved_errno = errno; /* We might get ENOSYS in the
2478 * next call.. */
2479 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2480
2481 if (ret == -1 && errno == ENOSYS) {
2482 errno = saved_errno; /* Ignore ENOSYS */
2483 } else {
2484 DEBUG(5, ("open_file_ntcreate: reset "
2485 "attributes of file %s to 0%o\n",
2486 smb_fname_str_dbg(smb_fname),
2487 (unsigned int)new_unx_mode));
2488 ret = 0; /* Don't do the fchmod below. */
2489 }
2490 }
2491
2492 if ((ret == -1) &&
2493 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2494 DEBUG(5, ("open_file_ntcreate: failed to reset "
2495 "attributes of file %s to 0%o\n",
2496 smb_fname_str_dbg(smb_fname),
2497 (unsigned int)new_unx_mode));
2498 }
2499
2500 /* If this is a successful open, we must remove any deferred open
2501 * records. */
2502 if (req != NULL) {
2503 del_deferred_open_entry(lck, req->mid,
2504 sconn_server_id(req->sconn));
2505 }
2506 TALLOC_FREE(lck);
2507
2508 return NT_STATUS_OK;
2509 }
2510
2511
2512 /****************************************************************************
2513 Open a file for for write to ensure that we can fchmod it.
2514 ****************************************************************************/
2515
2516 NTSTATUS open_file_fchmod(connection_struct *conn,
2517 struct smb_filename *smb_fname,
2518 files_struct **result)
2519 {
2520 if (!VALID_STAT(smb_fname->st)) {
2521 return NT_STATUS_INVALID_PARAMETER;
2522 }
2523
2524 return SMB_VFS_CREATE_FILE(
2525 conn, /* conn */
2526 NULL, /* req */
2527 0, /* root_dir_fid */
2528 smb_fname, /* fname */
2529 FILE_WRITE_DATA, /* access_mask */
2530 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2531 FILE_SHARE_DELETE),
2532 FILE_OPEN, /* create_disposition*/
2533 0, /* create_options */
2534 0, /* file_attributes */
2535 INTERNAL_OPEN_ONLY, /* oplock_request */
2536 0, /* allocation_size */
2537 0, /* private_flags */
2538 NULL, /* sd */
2539 NULL, /* ea_list */
2540 result, /* result */
2541 NULL); /* pinfo */
2542 }
2543
2544 static NTSTATUS mkdir_internal(connection_struct *conn,
2545 struct smb_filename *smb_dname,
2546 uint32 file_attributes)
2547 {
2548 mode_t mode;
2549 char *parent_dir = NULL;
2550 NTSTATUS status;
2551 bool posix_open = false;
2552 bool need_re_stat = false;
2553 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2554
2555 if(access_mask & ~(conn->share_access)) {
2556 DEBUG(5,("mkdir_internal: failing share access "
2557 "%s\n", lp_servicename(SNUM(conn))));
2558 return NT_STATUS_ACCESS_DENIED;
2559 }
2560
2561 status = check_name(conn, smb_dname->base_name);
2562 if (!NT_STATUS_IS_OK(status)) {
2563 return status;
2564 }
2565
2566 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2567 NULL)) {
2568 return NT_STATUS_NO_MEMORY;
2569 }
2570
2571 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2572 posix_open = true;
2573 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2574 } else {
2575 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2576 }
2577
2578 status = check_parent_access(conn,
2579 smb_dname,
2580 access_mask,
2581 &parent_dir);
2582 if(!NT_STATUS_IS_OK(status)) {
2583 DEBUG(5,("mkdir_internal: check_parent_access "
2584 "on directory %s for path %s returned %s\n",
2585 parent_dir,
2586 smb_dname->base_name,
2587 nt_errstr(status) ));
2588 return status;
2589 }
2590
2591 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2592 return map_nt_error_from_unix(errno);
2593 }
2594
2595 /* Ensure we're checking for a symlink here.... */
2596 /* We don't want to get caught by a symlink racer. */
2597
2598 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2599 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2600 smb_fname_str_dbg(smb_dname), strerror(errno)));
2601 return map_nt_error_from_unix(errno);
2602 }
2603
2604 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2605 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2606 smb_fname_str_dbg(smb_dname)));
2607 return NT_STATUS_NOT_A_DIRECTORY;
2608 }
2609
2610 if (lp_store_dos_attributes(SNUM(conn))) {
2611 if (!posix_open) {
2612 file_set_dosmode(conn, smb_dname,
2613 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2614 parent_dir, true);
2615 }
2616 }
2617
2618 if (lp_inherit_perms(SNUM(conn))) {
2619 inherit_access_posix_acl(conn, parent_dir,
2620 smb_dname->base_name, mode);
2621 need_re_stat = true;
2622 }
2623
2624 if (!posix_open) {
2625 /*
2626 * Check if high bits should have been set,
2627 * then (if bits are missing): add them.
2628 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2629 * dir.
2630 */
2631 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2632 (mode & ~smb_dname->st.st_ex_mode)) {
2633 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2634 (smb_dname->st.st_ex_mode |
2635 (mode & ~smb_dname->st.st_ex_mode)));
2636 need_re_stat = true;
2637 }
2638 }
2639
2640 /* Change the owner if required. */
2641 if (lp_inherit_owner(SNUM(conn))) {
2642 change_dir_owner_to_parent(conn, parent_dir,
2643 smb_dname->base_name,
2644 &smb_dname->st);
2645 need_re_stat = true;
2646 }
2647
2648 if (need_re_stat) {
2649 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2650 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2651 smb_fname_str_dbg(smb_dname), strerror(errno)));
2652 return map_nt_error_from_unix(errno);
2653 }
2654 }
2655
2656 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2657 smb_dname->base_name);
2658
2659 return NT_STATUS_OK;
2660 }
2661
2662 /****************************************************************************
2663 Ensure we didn't get symlink raced on opening a directory.
2664 ****************************************************************************/
2665
2666 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2667 const SMB_STRUCT_STAT *sbuf2)
2668 {
2669 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2670 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2671 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2672 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2673 return false;
2674 }
2675 return true;
2676 }
2677
2678 /****************************************************************************
2679 Open a directory from an NT SMB call.
2680 ****************************************************************************/
2681
2682 static NTSTATUS open_directory(connection_struct *conn,
2683 struct smb_request *req,
2684 struct smb_filename *smb_dname,
2685 uint32 access_mask,
2686 uint32 share_access,
2687 uint32 create_disposition,
2688 uint32 create_options,
2689 uint32 file_attributes,
2690 int *pinfo,
2691 files_struct **result)
2692 {
2693 files_struct *fsp = NULL;
2694 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2695 struct share_mode_lock *lck = NULL;
2696 NTSTATUS status;
2697 struct timespec mtimespec;
2698 int info = 0;
2699
2700 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2701
2702 /* Ensure we have a directory attribute. */
2703 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2704
2705 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2706 "share_access = 0x%x create_options = 0x%x, "
2707 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2708 smb_fname_str_dbg(smb_dname),
2709 (unsigned int)access_mask,
2710 (unsigned int)share_access,
2711 (unsigned int)create_options,
2712 (unsigned int)create_disposition,
2713 (unsigned int)file_attributes));
2714
2715 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2716 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2717 is_ntfs_stream_smb_fname(smb_dname)) {
2718 DEBUG(2, ("open_directory: %s is a stream name!\n",
2719 smb_fname_str_dbg(smb_dname)));
2720 return NT_STATUS_NOT_A_DIRECTORY;
2721 }
2722
2723 status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2724 access_mask, &access_mask);
2725 if (!NT_STATUS_IS_OK(status)) {
2726 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2727 "on file %s returned %s\n",
2728 smb_fname_str_dbg(smb_dname),
2729 nt_errstr(status)));
2730 return status;
2731 }
2732
2733 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2734 !security_token_has_privilege(get_current_nttok(conn),
2735 SEC_PRIV_SECURITY)) {
2736 DEBUG(10, ("open_directory: open on %s "
2737 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2738 smb_fname_str_dbg(smb_dname)));
2739 return NT_STATUS_PRIVILEGE_NOT_HELD;
2740 }
2741
2742 switch( create_disposition ) {
2743 case FILE_OPEN:
2744
2745 if (!dir_existed) {
2746 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2747 }
2748
2749 info = FILE_WAS_OPENED;
2750 break;
2751
2752 case FILE_CREATE:
2753
2754 /* If directory exists error. If directory doesn't
2755 * exist create. */
2756
2757 if (dir_existed) {
2758 status = NT_STATUS_OBJECT_NAME_COLLISION;
2759 DEBUG(2, ("open_directory: unable to create "
2760 "%s. Error was %s\n",
2761 smb_fname_str_dbg(smb_dname),
2762 nt_errstr(status)));
2763 return status;
2764 }
2765
2766 status = mkdir_internal(conn, smb_dname,
2767 file_attributes);
2768
2769 if (!NT_STATUS_IS_OK(status)) {
2770 DEBUG(2, ("open_directory: unable to create "
2771 "%s. Error was %s\n",
2772 smb_fname_str_dbg(smb_dname),
2773 nt_errstr(status)));
2774 return status;
2775 }
2776
2777 info = FILE_WAS_CREATED;
2778 break;
2779
2780 case FILE_OPEN_IF:
2781 /*
2782 * If directory exists open. If directory doesn't
2783 * exist create.
2784 */
2785
2786 if (dir_existed) {
2787 status = NT_STATUS_OK;
2788 info = FILE_WAS_OPENED;
2789 } else {
2790 status = mkdir_internal(conn, smb_dname,
2791 file_attributes);
2792
2793 if (NT_STATUS_IS_OK(status)) {
2794 info = FILE_WAS_CREATED;
2795 } else {
2796 /* Cope with create race. */
2797 if (!NT_STATUS_EQUAL(status,
2798 NT_STATUS_OBJECT_NAME_COLLISION)) {
2799 DEBUG(2, ("open_directory: unable to create "
2800 "%s. Error was %s\n",
2801 smb_fname_str_dbg(smb_dname),
2802 nt_errstr(status)));
2803 return status;
2804 }
2805 info = FILE_WAS_OPENED;
2806 }
2807 }
2808
2809 break;
2810
2811 case FILE_SUPERSEDE:
2812 case FILE_OVERWRITE:
2813 case FILE_OVERWRITE_IF:
2814 default:
2815 DEBUG(5,("open_directory: invalid create_disposition "
2816 "0x%x for directory %s\n",
2817 (unsigned int)create_disposition,
2818 smb_fname_str_dbg(smb_dname)));
2819 return NT_STATUS_INVALID_PARAMETER;
2820 }
2821
2822 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2823 DEBUG(5,("open_directory: %s is not a directory !\n",
2824 smb_fname_str_dbg(smb_dname)));
2825 return NT_STATUS_NOT_A_DIRECTORY;
2826 }
2827
2828 if (info == FILE_WAS_OPENED) {
2829 status = smbd_check_open_rights(conn, smb_dname, access_mask);
2830 if (!NT_STATUS_IS_OK(status)) {
2831 DEBUG(10, ("open_directory: smbd_check_open_rights on "
2832 "file %s failed with %s\n",
2833 smb_fname_str_dbg(smb_dname),
2834 nt_errstr(status)));
2835 return status;
2836 }
2837 }
2838
2839 status = file_new(req, conn, &fsp);
2840 if(!NT_STATUS_IS_OK(status)) {
2841 return status;
2842 }
2843
2844 /*
2845 * Setup the files_struct for it.
2846 */
2847
2848 fsp->mode = smb_dname->st.st_ex_mode;
2849 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2850 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2851 fsp->file_pid = req ? req->smbpid : 0;
2852 fsp->can_lock = False;
2853 fsp->can_read = False;
2854 fsp->can_write = False;
2855
2856 fsp->share_access = share_access;
2857 fsp->fh->private_options = 0;
2858 /*
2859 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2860 */
2861 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2862 fsp->print_file = NULL;
2863 fsp->modified = False;
2864 fsp->oplock_type = NO_OPLOCK;
2865 fsp->sent_oplock_break = NO_BREAK_SENT;
2866 fsp->is_directory = True;
2867 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2868 status = fsp_set_smb_fname(fsp, smb_dname);
2869 if (!NT_STATUS_IS_OK(status)) {
2870 file_free(req, fsp);
2871 return status;
2872 }
2873
2874 mtimespec = smb_dname->st.st_ex_mtime;
2875
2876 #ifdef O_DIRECTORY
2877 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2878 #else
2879 /* POSIX allows us to open a directory with O_RDONLY. */
2880 status = fd_open(conn, fsp, O_RDONLY, 0);
2881 #endif
2882 if (!NT_STATUS_IS_OK(status)) {
2883 DEBUG(5, ("open_directory: Could not open fd for "
2884 "%s (%s)\n",
2885 smb_fname_str_dbg(smb_dname),
2886 nt_errstr(status)));
2887 file_free(req, fsp);
2888 return status;
2889 }
2890
2891 status = vfs_stat_fsp(fsp);
2892 if (!NT_STATUS_IS_OK(status)) {
2893 fd_close(fsp);
2894 file_free(req, fsp);
2895 return status;
2896 }
2897
2898 /* Ensure there was no race condition. */
2899 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2900 DEBUG(5,("open_directory: stat struct differs for "
2901 "directory %s.\n",
2902 smb_fname_str_dbg(smb_dname)));
2903 fd_close(fsp);
2904 file_free(req, fsp);
2905 return NT_STATUS_ACCESS_DENIED;
2906 }
2907
2908 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2909 conn->connectpath, smb_dname, &mtimespec);
2910
2911 if (lck == NULL) {
2912 DEBUG(0, ("open_directory: Could not get share mode lock for "
2913 "%s\n", smb_fname_str_dbg(smb_dname)));
2914 fd_close(fsp);
2915 file_free(req, fsp);
2916 return NT_STATUS_SHARING_VIOLATION;
2917 }
2918
2919 status = open_mode_check(conn, lck, fsp->name_hash,
2920 access_mask, share_access,
2921 create_options, &dir_existed);
2922
2923 if (!NT_STATUS_IS_OK(status)) {
2924 TALLOC_FREE(lck);
2925 fd_close(fsp);
2926 file_free(req, fsp);
2927 return status;
2928 }
2929
2930 set_share_mode(lck, fsp, get_current_uid(conn),
2931 req ? req->mid : 0, NO_OPLOCK);
2932
2933 /* For directories the delete on close bit at open time seems
2934 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2935 if (create_options & FILE_DELETE_ON_CLOSE) {
2936 status = can_set_delete_on_close(fsp, 0);
2937 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2938 TALLOC_FREE(lck);
2939 fd_close(fsp);
2940 file_free(req, fsp);
2941 return status;
2942 }
2943
2944 if (NT_STATUS_IS_OK(status)) {
2945 /* Note that here we set the *inital* delete on close flag,
2946 not the regular one. The magic gets handled in close. */
2947 fsp->initial_delete_on_close = True;
2948 }
2949 }
2950
2951 TALLOC_FREE(lck);
2952
2953 if (pinfo) {
2954 *pinfo = info;
2955 }
2956
2957 *result = fsp;
2958 return NT_STATUS_OK;
2959 }
2960
2961 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2962 struct smb_filename *smb_dname)
2963 {
2964 NTSTATUS status;
2965 files_struct *fsp;
2966
2967 status = SMB_VFS_CREATE_FILE(
2968 conn, /* conn */
2969 req, /* req */
2970 0, /* root_dir_fid */
2971 smb_dname, /* fname */
2972 FILE_READ_ATTRIBUTES, /* access_mask */
2973 FILE_SHARE_NONE, /* share_access */
2974 FILE_CREATE, /* create_disposition*/
2975 FILE_DIRECTORY_FILE, /* create_options */
2976 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2977 0, /* oplock_request */
2978 0, /* allocation_size */
2979 0, /* private_flags */
2980 NULL, /* sd */
2981 NULL, /* ea_list */
2982 &fsp, /* result */
2983 NULL); /* pinfo */
2984
2985 if (NT_STATUS_IS_OK(status)) {
2986 close_file(req, fsp, NORMAL_CLOSE);
2987 }
2988
2989 return status;
2990 }
2991
2992 /****************************************************************************
2993 Receive notification that one of our open files has been renamed by another
2994 smbd process.
2995 ****************************************************************************/
2996
2997 void msg_file_was_renamed(struct messaging_context *msg,
2998 void *private_data,
2999 uint32_t msg_type,
3000 struct server_id server_id,
3001 DATA_BLOB *data)
3002 {
3003 struct smbd_server_connection *sconn;
3004 files_struct *fsp;
3005 char *frm = (char *)data->data;
3006 struct file_id id;
3007 const char *sharepath;
3008 const char *base_name;
3009 const char *stream_name;
3010 struct smb_filename *smb_fname = NULL;
3011 size_t sp_len, bn_len;
3012 NTSTATUS status;
3013
3014 sconn = msg_ctx_to_sconn(msg);
3015 if (sconn == NULL) {
3016 DEBUG(1, ("could not find sconn\n"));
3017 return;
3018 }
3019
3020 if (data->data == NULL
3021 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3022 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3023 (int)data->length));
3024 return;
3025 }
3026
3027 /* Unpack the message. */
3028 pull_file_id_24(frm, &id);
3029 sharepath = &frm[24];
3030 sp_len = strlen(sharepath);
3031 base_name = sharepath + sp_len + 1;
3032 bn_len = strlen(base_name);
3033 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3034
3035 /* stream_name must always be NULL if there is no stream. */
3036 if (stream_name[0] == '\0') {
3037 stream_name = NULL;
3038 }
3039
3040 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3041 stream_name, NULL, &smb_fname);
3042 if (!NT_STATUS_IS_OK(status)) {
3043 return;
3044 }
3045
3046 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3047 "file_id %s\n",
3048 sharepath, smb_fname_str_dbg(smb_fname),
3049 file_id_string_tos(&id)));
3050
3051 for(fsp = file_find_di_first(sconn, id); fsp;
3052 fsp = file_find_di_next(fsp)) {
3053 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3054
3055 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3056 fsp->fnum, fsp_str_dbg(fsp),
3057 smb_fname_str_dbg(smb_fname)));
3058 status = fsp_set_smb_fname(fsp, smb_fname);
3059 if (!NT_STATUS_IS_OK(status)) {
3060 goto out;
3061 }
3062 } else {
3063 /* TODO. JRA. */
3064 /* Now we have the complete path we can work out if this is
3065 actually within this share and adjust newname accordingly. */
3066 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3067 "not sharepath %s) "
3068 "fnum %d from %s -> %s\n",
3069 fsp->conn->connectpath,
3070 sharepath,
3071 fsp->fnum,
3072 fsp_str_dbg(fsp),
3073 smb_fname_str_dbg(smb_fname)));
3074 }
3075 }
3076 out:
3077 TALLOC_FREE(smb_fname);
3078 return;
3079 }
3080
3081 /*
3082 * If a main file is opened for delete, all streams need to be checked for
3083 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3084 * If that works, delete them all by setting the delete on close and close.
3085 */
3086
3087 NTSTATUS open_streams_for_delete(connection_struct *conn,
3088 const char *fname)
3089 {
3090 struct stream_struct *stream_info = NULL;
3091 files_struct **streams = NULL;
3092 int i;
3093 unsigned int num_streams = 0;
3094 TALLOC_CTX *frame = talloc_stackframe();
3095 NTSTATUS status;
3096
3097 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3098 &num_streams, &stream_info);
3099
3100 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3101 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3102 DEBUG(10, ("no streams around\n"));
3103 TALLOC_FREE(frame);
3104 return NT_STATUS_OK;
3105 }
3106
3107 if (!NT_STATUS_IS_OK(status)) {
3108 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3109 nt_errstr(status)));
3110 goto fail;
3111 }
3112
3113 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3114 num_streams));
3115
3116 if (num_streams == 0) {
3117 TALLOC_FREE(frame);
3118 return NT_STATUS_OK;
3119 }
3120
3121 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3122 if (streams == NULL) {
3123 DEBUG(0, ("talloc failed\n"));
3124 status = NT_STATUS_NO_MEMORY;
3125 goto fail;
3126 }
3127
3128 for (i=0; i<num_streams; i++) {
3129 struct smb_filename *smb_fname = NULL;
3130
3131 if (strequal(stream_info[i].name, "::$DATA")) {
3132 streams[i] = NULL;
3133 continue;
3134 }
3135
3136 status = create_synthetic_smb_fname(talloc_tos(), fname,
3137 stream_info[i].name,
3138 NULL, &smb_fname);
3139 if (!NT_STATUS_IS_OK(status)) {
3140 goto fail;
3141 }
3142
3143 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3144 DEBUG(10, ("Unable to stat stream: %s\n",
3145 smb_fname_str_dbg(smb_fname)));
3146 }
3147
3148 status = SMB_VFS_CREATE_FILE(
3149 conn, /* conn */
3150 NULL, /* req */
3151 0, /* root_dir_fid */
3152 smb_fname, /* fname */
3153 DELETE_ACCESS, /* access_mask */
3154 (FILE_SHARE_READ | /* share_access */
3155 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3156 FILE_OPEN, /* create_disposition*/
3157 0, /* create_options */
3158 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3159 0, /* oplock_request */
3160 0, /* allocation_size */
3161 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3162 NULL, /* sd */
3163 NULL, /* ea_list */
3164 &streams[i], /* result */
3165 NULL); /* pinfo */
3166
3167 if (!NT_STATUS_IS_OK(status)) {
3168 DEBUG(10, ("Could not open stream %s: %s\n",
3169 smb_fname_str_dbg(smb_fname),
3170 nt_errstr(status)));
3171
3172 TALLOC_FREE(smb_fname);
3173 break;
3174 }
3175 TALLOC_FREE(smb_fname);
3176 }
3177
3178 /*
3179 * don't touch the variable "status" beyond this point :-)
3180 */
3181
3182 for (i -= 1 ; i >= 0; i--) {
3183 if (streams[i] == NULL) {
3184 continue;
3185 }
3186
3187 DEBUG(10, ("Closing stream # %d, %s\n", i,
3188 fsp_str_dbg(streams[i])));
3189 close_file(NULL, streams[i], NORMAL_CLOSE);
3190 }
3191
3192 fail:
3193 TALLOC_FREE(frame);
3194 return status;
3195 }
3196
3197 /*
3198 * Wrapper around open_file_ntcreate and open_directory
3199 */
3200
3201 static NTSTATUS create_file_unixpath(connection_struct *conn,
3202 struct smb_request *req,
3203 struct smb_filename *smb_fname,
3204 uint32_t access_mask,
3205 uint32_t share_access,
3206 uint32_t create_disposition,
3207 uint32_t create_options,
3208 uint32_t file_attributes,
3209 uint32_t oplock_request,
3210 uint64_t allocation_size,
3211 uint32_t private_flags,
3212 struct security_descriptor *sd,
3213 struct ea_list *ea_list,
3214
3215 files_struct **result,
3216 int *pinfo)
3217 {
3218 int info = FILE_WAS_OPENED;
3219 files_struct *base_fsp = NULL;
3220 files_struct *fsp = NULL;
3221 NTSTATUS status;
3222
3223 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3224 "file_attributes = 0x%x, share_access = 0x%x, "
3225 "create_disposition = 0x%x create_options = 0x%x "
3226 "oplock_request = 0x%x private_flags = 0x%x "
3227 "ea_list = 0x%p, sd = 0x%p, "
3228 "fname = %s\n",
3229 (unsigned int)access_mask,
3230 (unsigned int)file_attributes,
3231 (unsigned int)share_access,
3232 (unsigned int)create_disposition,
3233 (unsigned int)create_options,
3234 (unsigned int)oplock_request,
3235 (unsigned int)private_flags,
3236 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3237
3238 if (create_options & FILE_OPEN_BY_FILE_ID) {
3239 status = NT_STATUS_NOT_SUPPORTED;
3240 goto fail;
3241 }
3242
3243 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3244 status = NT_STATUS_INVALID_PARAMETER;
3245 goto fail;
3246 }
3247
3248 if (req == NULL) {
3249 oplock_request |= INTERNAL_OPEN_ONLY;
3250 }
3251
3252 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3253 && (access_mask & DELETE_ACCESS)
3254 && !is_ntfs_stream_smb_fname(smb_fname)) {
3255 /*
3256 * We can't open a file with DELETE access if any of the
3257 * streams is open without FILE_SHARE_DELETE
3258 */
3259 status = open_streams_for_delete(conn, smb_fname->base_name);
3260
3261 if (!NT_STATUS_IS_OK(status)) {
3262 goto fail;
3263 }
3264 }
3265
3266 /* This is the correct thing to do (check every time) but can_delete
3267 * is expensive (it may have to read the parent directory
3268 * permissions). So for now we're not doing it unless we have a strong
3269 * hint the client is really going to delete this file. If the client
3270 * is forcing FILE_CREATE let the filesystem take care of the
3271 * permissions. */
3272
3273 /* Setting FILE_SHARE_DELETE is the hint. */
3274
3275 if ((create_disposition != FILE_CREATE)
3276 && (access_mask & DELETE_ACCESS)
3277 && (!(can_delete_file_in_directory(conn, smb_fname) ||
3278 can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
3279 status = NT_STATUS_ACCESS_DENIED;
3280 DEBUG(10,("create_file_unixpath: open file %s "
3281 "for delete ACCESS_DENIED\n",
3282 smb_fname_str_dbg(smb_fname)));
3283 goto fail;
3284 }
3285
3286 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3287 !security_token_has_privilege(get_current_nttok(conn),
3288 SEC_PRIV_SECURITY)) {
3289 DEBUG(10, ("create_file_unixpath: open on %s "
3290 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3291 smb_fname_str_dbg(smb_fname)));
3292 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3293 goto fail;
3294 }
3295
3296 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3297 && is_ntfs_stream_smb_fname(smb_fname)
3298 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3299 uint32 base_create_disposition;
3300 struct smb_filename *smb_fname_base = NULL;
3301
3302 if (create_options & FILE_DIRECTORY_FILE) {
3303 status = NT_STATUS_NOT_A_DIRECTORY;
3304 goto fail;
3305 }
3306
3307 switch (create_disposition) {
3308 case FILE_OPEN:
3309 base_create_disposition = FILE_OPEN;
3310 break;
3311 default:
3312 base_create_disposition = FILE_OPEN_IF;
3313 break;
3314 }
3315
3316 /* Create an smb_filename with stream_name == NULL. */
3317 status = create_synthetic_smb_fname(talloc_tos(),
3318 smb_fname->base_name,
3319 NULL, NULL,
3320 &smb_fname_base);
3321 if (!NT_STATUS_IS_OK(status)) {
3322 goto fail;
3323 }
3324
3325 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3326 DEBUG(10, ("Unable to stat stream: %s\n",
3327 smb_fname_str_dbg(smb_fname_base)));
3328 }
3329
3330 /* Open the base file. */
3331 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3332 FILE_SHARE_READ
3333 | FILE_SHARE_WRITE
3334 | FILE_SHARE_DELETE,
3335 base_create_disposition,
3336 0, 0, 0, 0, 0, NULL, NULL,
3337 &base_fsp, NULL);
3338 TALLOC_FREE(smb_fname_base);
3339
3340 if (!NT_STATUS_IS_OK(status)) {
3341 DEBUG(10, ("create_file_unixpath for base %s failed: "
3342 "%s\n", smb_fname->base_name,
3343 nt_errstr(status)));
3344 goto fail;
3345 }
3346 /* we don't need to low level fd */
3347 fd_close(base_fsp);
3348 }
3349
3350 /*
3351 * If it's a request for a directory open, deal with it separately.
3352 */
3353
3354 if (create_options & FILE_DIRECTORY_FILE) {
3355
3356 if (create_options & FILE_NON_DIRECTORY_FILE) {
3357 status = NT_STATUS_INVALID_PARAMETER;
3358 goto fail;
3359 }
3360
3361 /* Can't open a temp directory. IFS kit test. */
3362 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3363 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3364 status = NT_STATUS_INVALID_PARAMETER;
3365 goto fail;
3366 }
3367
3368 /*
3369 * We will get a create directory here if the Win32
3370 * app specified a security descriptor in the
3371 * CreateDirectory() call.
3372 */
3373
3374 oplock_request = 0;
3375 status = open_directory(
3376 conn, req, smb_fname, access_mask, share_access,
3377 create_disposition, create_options, file_attributes,
3378 &info, &fsp);
3379 } else {
3380
3381 /*
3382 * Ordinary file case.
3383 */
3384
3385 status = file_new(req, conn, &fsp);
3386 if(!NT_STATUS_IS_OK(status)) {
3387 goto fail;
3388 }
3389
3390 status = fsp_set_smb_fname(fsp, smb_fname);
3391 if (!NT_STATUS_IS_OK(status)) {
3392 goto fail;
3393 }
3394
3395 /*
3396 * We're opening the stream element of a base_fsp
3397 * we already opened. Set up the base_fsp pointer.
3398 */
3399 if (base_fsp) {
3400 fsp->base_fsp = base_fsp;
3401 }
3402
3403 status = open_file_ntcreate(conn,
3404 req,
3405 access_mask,
3406 share_access,
3407 create_disposition,
3408 create_options,
3409 file_attributes,
3410 oplock_request,
3411 private_flags,
3412 &info,
3413 fsp);
3414
3415 if(!NT_STATUS_IS_OK(status)) {
3416 file_free(req, fsp);
3417 fsp = NULL;
3418 }
3419
3420 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3421
3422 /* A stream open never opens a directory */
3423
3424 if (base_fsp) {
3425 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3426 goto fail;
3427 }
3428
3429 /*
3430 * Fail the open if it was explicitly a non-directory
3431 * file.
3432 */
3433
3434 if (create_options & FILE_NON_DIRECTORY_FILE) {
3435 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3436 goto fail;
3437 }
3438
3439 oplock_request = 0;
3440 status = open_directory(
3441 conn, req, smb_fname, access_mask,
3442 share_access, create_disposition,
3443 create_options, file_attributes,
3444 &info, &fsp);
3445 }
3446 }
3447
3448 if (!NT_STATUS_IS_OK(status)) {
3449 goto fail;
3450 }
3451
3452 fsp->base_fsp = base_fsp;
3453
3454 /*
3455 * According to the MS documentation, the only time the security
3456 * descriptor is applied to the opened file is iff we *created* the
3457 * file; an existing file stays the same.
3458 *
3459 * Also, it seems (from observation) that you can open the file with
3460 * any access mask but you can still write the sd. We need to override
3461 * the granted access before we call set_sd
3462 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3463 */
3464
3465 if ((sd != NULL) && (info == FILE_WAS_CREATED)
3466 && lp_nt_acl_support(SNUM(conn))) {
3467
3468 uint32_t sec_info_sent;
3469 uint32_t saved_access_mask = fsp->access_mask;
3470
3471 sec_info_sent = get_sec_info(sd);
3472
3473 fsp->access_mask = FILE_GENERIC_ALL;
3474
3475 /* Convert all the generic bits. */
3476 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3477 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3478
3479 if (sec_info_sent & (SECINFO_OWNER|
3480 SECINFO_GROUP|
3481 SECINFO_DACL|
3482 SECINFO_SACL)) {
3483 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3484 }
3485
3486 fsp->access_mask = saved_access_mask;
3487
3488 if (!NT_STATUS_IS_OK(status)) {
3489 goto fail;
3490 }
3491 }
3492
3493 if ((ea_list != NULL) &&
3494 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3495 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3496 if (!NT_STATUS_IS_OK(status)) {
3497 goto fail;
3498 }
3499 }
3500
3501 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3502 status = NT_STATUS_ACCESS_DENIED;
3503 goto fail;
3504 }
3505
3506 /* Save the requested allocation size. */
3507 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3508 if (allocation_size
3509 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3510 fsp->initial_allocation_size = smb_roundup(
3511 fsp->conn, allocation_size);
3512 if (fsp->is_directory) {
3513 /* Can't set allocation size on a directory. */
3514 status = NT_STATUS_ACCESS_DENIED;
3515 goto fail;
3516 }
3517 if (vfs_allocate_file_space(
3518 fsp, fsp->initial_allocation_size) == -1) {
3519 status = NT_STATUS_DISK_FULL;
3520 goto fail;
3521 }
3522 } else {
3523 fsp->initial_allocation_size = smb_roundup(
3524 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3525 }
3526 }
3527
3528 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3529
3530 *result = fsp;
3531 if (pinfo != NULL) {
3532 *pinfo = info;
3533 }
3534
3535 smb_fname->st = fsp->fsp_name->st;
3536
3537 return NT_STATUS_OK;
3538
3539 fail:
3540 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3541
3542 if (fsp != NULL) {
3543 if (base_fsp && fsp->base_fsp == base_fsp) {
3544 /*
3545 * The close_file below will close
3546 * fsp->base_fsp.
3547 */
3548 base_fsp = NULL;
3549 }
3550 close_file(req, fsp, ERROR_CLOSE);
3551 fsp = NULL;
3552 }
3553 if (base_fsp != NULL) {
3554 close_file(req, base_fsp, ERROR_CLOSE);
3555 base_fsp = NULL;
3556 }
3557 return status;
3558 }
3559
3560 /*
3561 * Calculate the full path name given a relative fid.
3562 */
3563 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3564 struct smb_request *req,
3565 uint16_t root_dir_fid,
3566 const struct smb_filename *smb_fname,
3567 struct smb_filename **smb_fname_out)
3568 {
3569 files_struct *dir_fsp;
3570 char *parent_fname = NULL;
3571 char *new_base_name = NULL;
3572 NTSTATUS status;
3573
3574 if (root_dir_fid == 0 || !smb_fname) {
3575 status = NT_STATUS_INTERNAL_ERROR;
3576 goto out;
3577 }
3578
3579 dir_fsp = file_fsp(req, root_dir_fid);
3580
3581 if (dir_fsp == NULL) {
3582 status = NT_STATUS_INVALID_HANDLE;
3583 goto out;
3584 }
3585
3586 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3587 status = NT_STATUS_INVALID_HANDLE;
3588 goto out;
3589 }
3590
3591 if (!dir_fsp->is_directory) {
3592
3593 /*
3594 * Check to see if this is a mac fork of some kind.
3595 */
3596
3597 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3598 is_ntfs_stream_smb_fname(smb_fname)) {
3599 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3600 goto out;
3601 }
3602
3603 /*
3604 we need to handle the case when we get a
3605 relative open relative to a file and the
3606 pathname is blank - this is a reopen!
3607 (hint from demyn plantenberg)
3608 */
3609
3610 status = NT_STATUS_INVALID_HANDLE;
3611 goto out;
3612 }
3613
3614 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3615 /*
3616 * We're at the toplevel dir, the final file name
3617 * must not contain ./, as this is filtered out
3618 * normally by srvstr_get_path and unix_convert
3619 * explicitly rejects paths containing ./.
3620 */
3621 parent_fname = talloc_strdup(talloc_tos(), "");
3622 if (parent_fname == NULL) {
3623 status = NT_STATUS_NO_MEMORY;
3624 goto out;
3625 }
3626 } else {
3627 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3628
3629 /*
3630 * Copy in the base directory name.
3631 */
3632
3633 parent_fname = talloc_array(talloc_tos(), char,
3634 dir_name_len+2);
3635 if (parent_fname == NULL) {
3636 status = NT_STATUS_NO_MEMORY;
3637 goto out;
3638 }
3639 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3640 dir_name_len+1);
3641
3642 /*
3643 * Ensure it ends in a '/'.
3644 * We used TALLOC_SIZE +2 to add space for the '/'.
3645 */
3646
3647 if(dir_name_len
3648 && (parent_fname[dir_name_len-1] != '\\')
3649 && (parent_fname[dir_name_len-1] != '/')) {
3650 parent_fname[dir_name_len] = '/';
3651 parent_fname[dir_name_len+1] = '\0';
3652 }
3653 }
3654
3655 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3656 smb_fname->base_name);
3657 if (new_base_name == NULL) {
3658 status = NT_STATUS_NO_MEMORY;
3659 goto out;
3660 }
3661
3662 status = filename_convert(req,
3663 conn,
3664 req->flags2 & FLAGS2_DFS_PATHNAMES,
3665 new_base_name,
3666 0,
3667 NULL,
3668 smb_fname_out);
3669 if (!NT_STATUS_IS_OK(status)) {
3670 goto out;
3671 }
3672
3673 out:
3674 TALLOC_FREE(parent_fname);
3675 TALLOC_FREE(new_base_name);
3676 return status;
3677 }
3678
3679 NTSTATUS create_file_default(connection_struct *conn,
3680 struct smb_request *req,
3681 uint16_t root_dir_fid,
3682 struct smb_filename *smb_fname,
3683 uint32_t access_mask,
3684 uint32_t share_access,
3685 uint32_t create_disposition,
3686 uint32_t create_options,
3687 uint32_t file_attributes,
3688 uint32_t oplock_request,
3689 uint64_t allocation_size,
3690 uint32_t private_flags,
3691 struct security_descriptor *sd,
3692 struct ea_list *ea_list,
3693 files_struct **result,
3694 int *pinfo)
3695 {
3696 int info = FILE_WAS_OPENED;
3697 files_struct *fsp = NULL;
3698 NTSTATUS status;
3699 bool stream_name = false;
3700
3701 DEBUG(10,("create_file: access_mask = 0x%x "
3702 "file_attributes = 0x%x, share_access = 0x%x, "
3703 "create_disposition = 0x%x create_options = 0x%x "
3704 "oplock_request = 0x%x "
3705 "private_flags = 0x%x "
3706 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3707 "fname = %s\n",
3708 (unsigned int)access_mask,
3709 (unsigned int)file_attributes,
3710 (unsigned int)share_access,
3711 (unsigned int)create_disposition,
3712 (unsigned int)create_options,
3713 (unsigned int)oplock_request,
3714 (unsigned int)private_flags,
3715 (unsigned int)root_dir_fid,
3716 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3717
3718 /*
3719 * Calculate the filename from the root_dir_if if necessary.
3720 */
3721
3722 if (root_dir_fid != 0) {
3723 struct smb_filename *smb_fname_out = NULL;
3724 status = get_relative_fid_filename(conn, req, root_dir_fid,
3725 smb_fname, &smb_fname_out);
3726 if (!NT_STATUS_IS_OK(status)) {
3727 goto fail;
3728 }
3729 smb_fname = smb_fname_out;
3730 }
3731
3732 /*
3733 * Check to see if this is a mac fork of some kind.
3734 */
3735
3736 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3737 if (stream_name) {
3738 enum FAKE_FILE_TYPE fake_file_type;
3739
3740 fake_file_type = is_fake_file(smb_fname);
3741
3742 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3743
3744 /*
3745 * Here we go! support for changing the disk quotas
3746 * --metze
3747 *
3748 * We need to fake up to open this MAGIC QUOTA file
3749 * and return a valid FID.
3750 *
3751 * w2k close this file directly after openening xp
3752 * also tries a QUERY_FILE_INFO on the file and then
3753 * close it
3754 */
3755 status = open_fake_file(req, conn, req->vuid,
3756 fake_file_type, smb_fname,
3757 access_mask, &fsp);
3758 if (!NT_STATUS_IS_OK(status)) {
3759 goto fail;
3760 }
3761
3762 ZERO_STRUCT(smb_fname->st);
3763 goto done;
3764 }
3765
3766 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3767 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3768 goto fail;
3769 }
3770 }
3771
3772 /* All file access must go through check_name() */
3773
3774 status = check_name(conn, smb_fname->base_name);
3775 if (!NT_STATUS_IS_OK(status)) {
3776 goto fail;
3777 }
3778
3779 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3780 int ret;
3781 smb_fname->stream_name = NULL;
3782 /* We have to handle this error here. */
3783 if (create_options & FILE_DIRECTORY_FILE) {
3784 status = NT_STATUS_NOT_A_DIRECTORY;
3785 goto fail;
3786 }
3787 if (lp_posix_pathnames()) {
3788 ret = SMB_VFS_LSTAT(conn, smb_fname);
3789 } else {
3790 ret = SMB_VFS_STAT(conn, smb_fname);
3791 }
3792
3793 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3794 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3795 goto fail;
3796 }
3797 }
3798
3799 status = create_file_unixpath(
3800 conn, req, smb_fname, access_mask, share_access,
3801 create_disposition, create_options, file_attributes,
3802 oplock_request, allocation_size, private_flags,
3803 sd, ea_list,
3804 &fsp, &info);
3805
3806 if (!NT_STATUS_IS_OK(status)) {
3807 goto fail;
3808 }
3809
3810 done:
3811 DEBUG(10, ("create_file: info=%d\n", info));
3812
3813 *result = fsp;
3814 if (pinfo != NULL) {
3815 *pinfo = info;
3816 }
3817 return NT_STATUS_OK;
3818
3819 fail:
3820 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3821
3822 if (fsp != NULL) {
3823 close_file(req, fsp, ERROR_CLOSE);
3824 fsp = NULL;
3825 }
3826 return status;
3827 }
Working branch of Samba for id10ts