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s3: Make open_file_ntcreate a bit easier to read
[Samba/gebeck_regimport.git] / source3 / smbd / open.c
blob10606788b40abb73e5a0bbae3e55d00f1762bdfa
1 /*
2 Unix SMB/CIFS implementation.
3 file opening and share modes
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2004
6 Copyright (C) Volker Lendecke 2005
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "system/filesys.h"
24 #include "printing.h"
25 #include "smbd/smbd.h"
26 #include "smbd/globals.h"
27 #include "fake_file.h"
28 #include "../libcli/security/security.h"
29 #include "../librpc/gen_ndr/ndr_security.h"
30 #include "../librpc/gen_ndr/open_files.h"
31 #include "auth.h"
32 #include "messages.h"
33
34 extern const struct generic_mapping file_generic_mapping;
35
36 struct deferred_open_record {
37 bool delayed_for_oplocks;
38 struct file_id id;
39 };
40
41 /****************************************************************************
42 If the requester wanted DELETE_ACCESS and was rejected because
43 the file ACL didn't include DELETE_ACCESS, see if the parent ACL
44 ovverrides this.
45 ****************************************************************************/
46
47 static bool parent_override_delete(connection_struct *conn,
48 const struct smb_filename *smb_fname,
49 uint32_t access_mask,
50 uint32_t rejected_mask)
51 {
52 if ((access_mask & DELETE_ACCESS) &&
53 (rejected_mask & DELETE_ACCESS) &&
54 can_delete_file_in_directory(conn, smb_fname)) {
55 return true;
56 }
57 return false;
58 }
59
60 /****************************************************************************
61 Check if we have open rights.
62 ****************************************************************************/
63
64 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
65 const struct smb_filename *smb_fname,
66 uint32_t access_mask)
67 {
68 /* Check if we have rights to open. */
69 NTSTATUS status;
70 struct security_descriptor *sd = NULL;
71 uint32_t rejected_share_access;
72 uint32_t rejected_mask = 0;
73
74 rejected_share_access = access_mask & ~(conn->share_access);
75
76 if (rejected_share_access) {
77 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
78 "on %s (0x%x)\n",
79 (unsigned int)access_mask,
80 smb_fname_str_dbg(smb_fname),
81 (unsigned int)rejected_share_access ));
82 return NT_STATUS_ACCESS_DENIED;
83 }
84
85 if (get_current_uid(conn) == (uid_t)0) {
86 /* I'm sorry sir, I didn't know you were root... */
87 DEBUG(10,("smbd_check_access_rights: root override "
88 "on %s. Granting 0x%x\n",
89 smb_fname_str_dbg(smb_fname),
90 (unsigned int)access_mask ));
91 return NT_STATUS_OK;
92 }
93
94 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
95 DEBUG(10,("smbd_check_access_rights: not checking ACL "
96 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
97 smb_fname_str_dbg(smb_fname),
98 (unsigned int)access_mask ));
99 return NT_STATUS_OK;
100 }
101
102 if (access_mask == DELETE_ACCESS && S_ISLNK(smb_fname->st.st_ex_mode)) {
103 /* We can always delete a symlink. */
104 DEBUG(10,("smbd_check_access_rights: not checking ACL "
105 "on DELETE_ACCESS on symlink %s.\n",
106 smb_fname_str_dbg(smb_fname) ));
107 return NT_STATUS_OK;
108 }
109
110 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
111 (SECINFO_OWNER |
112 SECINFO_GROUP |
113 SECINFO_DACL),&sd);
114
115 if (!NT_STATUS_IS_OK(status)) {
116 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
117 "on %s: %s\n",
118 smb_fname_str_dbg(smb_fname),
119 nt_errstr(status)));
120 return status;
121 }
122
123 /*
124 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
125 * owner WRITE_DAC and READ_CONTROL.
126 */
127 status = se_access_check(sd,
128 get_current_nttok(conn),
129 (access_mask & ~FILE_READ_ATTRIBUTES),
130 &rejected_mask);
131
132 DEBUG(10,("smbd_check_access_rights: file %s requesting "
133 "0x%x returning 0x%x (%s)\n",
134 smb_fname_str_dbg(smb_fname),
135 (unsigned int)access_mask,
136 (unsigned int)rejected_mask,
137 nt_errstr(status) ));
138
139 if (!NT_STATUS_IS_OK(status)) {
140 if (DEBUGLEVEL >= 10) {
141 DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
142 smb_fname_str_dbg(smb_fname) ));
143 NDR_PRINT_DEBUG(security_descriptor, sd);
144 }
145 }
146
147 TALLOC_FREE(sd);
148
149 if (NT_STATUS_IS_OK(status) ||
150 !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
151 return status;
152 }
153
154 /* Here we know status == NT_STATUS_ACCESS_DENIED. */
155 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
156 (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
157 (lp_map_readonly(SNUM(conn)) ||
158 lp_map_archive(SNUM(conn)) ||
159 lp_map_hidden(SNUM(conn)) ||
160 lp_map_system(SNUM(conn)))) {
161 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
162
163 DEBUG(10,("smbd_check_access_rights: "
164 "overrode "
165 "FILE_WRITE_ATTRIBUTES "
166 "on file %s\n",
167 smb_fname_str_dbg(smb_fname)));
168 }
169
170 if (parent_override_delete(conn,
171 smb_fname,
172 access_mask,
173 rejected_mask)) {
174 /* Were we trying to do an open
175 * for delete and didn't get DELETE
176 * access (only) ? Check if the
177 * directory allows DELETE_CHILD.
178 * See here:
179 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
180 * for details. */
181
182 rejected_mask &= ~DELETE_ACCESS;
183
184 DEBUG(10,("smbd_check_access_rights: "
185 "overrode "
186 "DELETE_ACCESS on "
187 "file %s\n",
188 smb_fname_str_dbg(smb_fname)));
189 }
190
191 if (rejected_mask != 0) {
192 return NT_STATUS_ACCESS_DENIED;
193 } else {
194 return NT_STATUS_OK;
195 }
196 }
197
198 static NTSTATUS check_parent_access(struct connection_struct *conn,
199 struct smb_filename *smb_fname,
200 uint32_t access_mask,
201 char **pp_parent_dir)
202 {
203 NTSTATUS status;
204 char *parent_dir = NULL;
205 struct security_descriptor *parent_sd = NULL;
206 uint32_t access_granted = 0;
207
208 if (!parent_dirname(talloc_tos(),
209 smb_fname->base_name,
210 &parent_dir,
211 NULL)) {
212 return NT_STATUS_NO_MEMORY;
213 }
214
215 if (pp_parent_dir) {
216 *pp_parent_dir = parent_dir;
217 }
218
219 if (get_current_uid(conn) == (uid_t)0) {
220 /* I'm sorry sir, I didn't know you were root... */
221 DEBUG(10,("check_parent_access: root override "
222 "on %s. Granting 0x%x\n",
223 smb_fname_str_dbg(smb_fname),
224 (unsigned int)access_mask ));
225 return NT_STATUS_OK;
226 }
227
228 status = SMB_VFS_GET_NT_ACL(conn,
229 parent_dir,
230 SECINFO_DACL,
231 &parent_sd);
232
233 if (!NT_STATUS_IS_OK(status)) {
234 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
235 "%s with error %s\n",
236 parent_dir,
237 nt_errstr(status)));
238 return status;
239 }
240
241 /*
242 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
243 * owner WRITE_DAC and READ_CONTROL.
244 */
245 status = se_access_check(parent_sd,
246 get_current_nttok(conn),
247 (access_mask & ~FILE_READ_ATTRIBUTES),
248 &access_granted);
249 if(!NT_STATUS_IS_OK(status)) {
250 DEBUG(5,("check_parent_access: access check "
251 "on directory %s for "
252 "path %s for mask 0x%x returned (0x%x) %s\n",
253 parent_dir,
254 smb_fname->base_name,
255 access_mask,
256 access_granted,
257 nt_errstr(status) ));
258 return status;
259 }
260
261 return NT_STATUS_OK;
262 }
263
264 /****************************************************************************
265 fd support routines - attempt to do a dos_open.
266 ****************************************************************************/
267
268 static NTSTATUS fd_open(struct connection_struct *conn,
269 files_struct *fsp,
270 int flags,
271 mode_t mode)
272 {
273 struct smb_filename *smb_fname = fsp->fsp_name;
274 NTSTATUS status = NT_STATUS_OK;
275
276 #ifdef O_NOFOLLOW
277 /*
278 * Never follow symlinks on a POSIX client. The
279 * client should be doing this.
280 */
281
282 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
283 flags |= O_NOFOLLOW;
284 }
285 #endif
286
287 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
288 if (fsp->fh->fd == -1) {
289 status = map_nt_error_from_unix(errno);
290 if (errno == EMFILE) {
291 static time_t last_warned = 0L;
292
293 if (time((time_t *) NULL) > last_warned) {
294 DEBUG(0,("Too many open files, unable "
295 "to open more! smbd's max "
296 "open files = %d\n",
297 lp_max_open_files()));
298 last_warned = time((time_t *) NULL);
299 }
300 }
301
302 }
303
304 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
305 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
306 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
307
308 return status;
309 }
310
311 /****************************************************************************
312 Close the file associated with a fsp.
313 ****************************************************************************/
314
315 NTSTATUS fd_close(files_struct *fsp)
316 {
317 int ret;
318
319 if (fsp->dptr) {
320 dptr_CloseDir(fsp);
321 }
322 if (fsp->fh->fd == -1) {
323 return NT_STATUS_OK; /* What we used to call a stat open. */
324 }
325 if (fsp->fh->ref_count > 1) {
326 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
327 }
328
329 ret = SMB_VFS_CLOSE(fsp);
330 fsp->fh->fd = -1;
331 if (ret == -1) {
332 return map_nt_error_from_unix(errno);
333 }
334 return NT_STATUS_OK;
335 }
336
337 /****************************************************************************
338 Change the ownership of a file to that of the parent directory.
339 Do this by fd if possible.
340 ****************************************************************************/
341
342 void change_file_owner_to_parent(connection_struct *conn,
343 const char *inherit_from_dir,
344 files_struct *fsp)
345 {
346 struct smb_filename *smb_fname_parent = NULL;
347 NTSTATUS status;
348 int ret;
349
350 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
351 NULL, NULL, &smb_fname_parent);
352 if (!NT_STATUS_IS_OK(status)) {
353 return;
354 }
355
356 ret = SMB_VFS_STAT(conn, smb_fname_parent);
357 if (ret == -1) {
358 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
359 "directory %s. Error was %s\n",
360 smb_fname_str_dbg(smb_fname_parent),
361 strerror(errno)));
362 TALLOC_FREE(smb_fname_parent);
363 return;
364 }
365
366 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
367 /* Already this uid - no need to change. */
368 DEBUG(10,("change_file_owner_to_parent: file %s "
369 "is already owned by uid %d\n",
370 fsp_str_dbg(fsp),
371 (int)fsp->fsp_name->st.st_ex_uid ));
372 TALLOC_FREE(smb_fname_parent);
373 return;
374 }
375
376 become_root();
377 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
378 unbecome_root();
379 if (ret == -1) {
380 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
381 "file %s to parent directory uid %u. Error "
382 "was %s\n", fsp_str_dbg(fsp),
383 (unsigned int)smb_fname_parent->st.st_ex_uid,
384 strerror(errno) ));
385 } else {
386 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
387 "parent directory uid %u.\n", fsp_str_dbg(fsp),
388 (unsigned int)smb_fname_parent->st.st_ex_uid));
389 /* Ensure the uid entry is updated. */
390 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
391 }
392
393 TALLOC_FREE(smb_fname_parent);
394 }
395
396 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
397 const char *inherit_from_dir,
398 const char *fname,
399 SMB_STRUCT_STAT *psbuf)
400 {
401 struct smb_filename *smb_fname_parent = NULL;
402 struct smb_filename *smb_fname_cwd = NULL;
403 char *saved_dir = NULL;
404 TALLOC_CTX *ctx = talloc_tos();
405 NTSTATUS status = NT_STATUS_OK;
406 int ret;
407
408 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
409 &smb_fname_parent);
410 if (!NT_STATUS_IS_OK(status)) {
411 return status;
412 }
413
414 ret = SMB_VFS_STAT(conn, smb_fname_parent);
415 if (ret == -1) {
416 status = map_nt_error_from_unix(errno);
417 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
418 "directory %s. Error was %s\n",
419 smb_fname_str_dbg(smb_fname_parent),
420 strerror(errno)));
421 goto out;
422 }
423
424 /* We've already done an lstat into psbuf, and we know it's a
425 directory. If we can cd into the directory and the dev/ino
426 are the same then we can safely chown without races as
427 we're locking the directory in place by being in it. This
428 should work on any UNIX (thanks tridge :-). JRA.
429 */
430
431 saved_dir = vfs_GetWd(ctx,conn);
432 if (!saved_dir) {
433 status = map_nt_error_from_unix(errno);
434 DEBUG(0,("change_dir_owner_to_parent: failed to get "
435 "current working directory. Error was %s\n",
436 strerror(errno)));
437 goto out;
438 }
439
440 /* Chdir into the new path. */
441 if (vfs_ChDir(conn, fname) == -1) {
442 status = map_nt_error_from_unix(errno);
443 DEBUG(0,("change_dir_owner_to_parent: failed to change "
444 "current working directory to %s. Error "
445 "was %s\n", fname, strerror(errno) ));
446 goto chdir;
447 }
448
449 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
450 &smb_fname_cwd);
451 if (!NT_STATUS_IS_OK(status)) {
452 return status;
453 }
454
455 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
456 if (ret == -1) {
457 status = map_nt_error_from_unix(errno);
458 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
459 "directory '.' (%s) Error was %s\n",
460 fname, strerror(errno)));
461 goto chdir;
462 }
463
464 /* Ensure we're pointing at the same place. */
465 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
466 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
467 DEBUG(0,("change_dir_owner_to_parent: "
468 "device/inode on directory %s changed. "
469 "Refusing to chown !\n", fname ));
470 status = NT_STATUS_ACCESS_DENIED;
471 goto chdir;
472 }
473
474 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
475 /* Already this uid - no need to change. */
476 DEBUG(10,("change_dir_owner_to_parent: directory %s "
477 "is already owned by uid %d\n",
478 fname,
479 (int)smb_fname_cwd->st.st_ex_uid ));
480 status = NT_STATUS_OK;
481 goto chdir;
482 }
483
484 become_root();
485 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
486 (gid_t)-1);
487 unbecome_root();
488 if (ret == -1) {
489 status = map_nt_error_from_unix(errno);
490 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
491 "directory %s to parent directory uid %u. "
492 "Error was %s\n", fname,
493 (unsigned int)smb_fname_parent->st.st_ex_uid,
494 strerror(errno) ));
495 } else {
496 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
497 "directory %s to parent directory uid %u.\n",
498 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
499 /* Ensure the uid entry is updated. */
500 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
501 }
502
503 chdir:
504 vfs_ChDir(conn,saved_dir);
505 out:
506 TALLOC_FREE(smb_fname_parent);
507 TALLOC_FREE(smb_fname_cwd);
508 return status;
509 }
510
511 /****************************************************************************
512 Open a file.
513 ****************************************************************************/
514
515 static NTSTATUS open_file(files_struct *fsp,
516 connection_struct *conn,
517 struct smb_request *req,
518 const char *parent_dir,
519 int flags,
520 mode_t unx_mode,
521 uint32 access_mask, /* client requested access mask. */
522 uint32 open_access_mask) /* what we're actually using in the open. */
523 {
524 struct smb_filename *smb_fname = fsp->fsp_name;
525 NTSTATUS status = NT_STATUS_OK;
526 int accmode = (flags & O_ACCMODE);
527 int local_flags = flags;
528 bool file_existed = VALID_STAT(fsp->fsp_name->st);
529 bool file_created = false;
530
531 fsp->fh->fd = -1;
532 errno = EPERM;
533
534 /* Check permissions */
535
536 /*
537 * This code was changed after seeing a client open request
538 * containing the open mode of (DENY_WRITE/read-only) with
539 * the 'create if not exist' bit set. The previous code
540 * would fail to open the file read only on a read-only share
541 * as it was checking the flags parameter directly against O_RDONLY,
542 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
543 * JRA.
544 */
545
546 if (!CAN_WRITE(conn)) {
547 /* It's a read-only share - fail if we wanted to write. */
548 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
549 DEBUG(3,("Permission denied opening %s\n",
550 smb_fname_str_dbg(smb_fname)));
551 return NT_STATUS_ACCESS_DENIED;
552 } else if(flags & O_CREAT) {
553 /* We don't want to write - but we must make sure that
554 O_CREAT doesn't create the file if we have write
555 access into the directory.
556 */
557 flags &= ~(O_CREAT|O_EXCL);
558 local_flags &= ~(O_CREAT|O_EXCL);
559 }
560 }
561
562 /*
563 * This little piece of insanity is inspired by the
564 * fact that an NT client can open a file for O_RDONLY,
565 * but set the create disposition to FILE_EXISTS_TRUNCATE.
566 * If the client *can* write to the file, then it expects to
567 * truncate the file, even though it is opening for readonly.
568 * Quicken uses this stupid trick in backup file creation...
569 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
570 * for helping track this one down. It didn't bite us in 2.0.x
571 * as we always opened files read-write in that release. JRA.
572 */
573
574 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
575 DEBUG(10,("open_file: truncate requested on read-only open "
576 "for file %s\n", smb_fname_str_dbg(smb_fname)));
577 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
578 }
579
580 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
581 (!file_existed && (local_flags & O_CREAT)) ||
582 ((local_flags & O_TRUNC) == O_TRUNC) ) {
583 const char *wild;
584
585 /*
586 * We can't actually truncate here as the file may be locked.
587 * open_file_ntcreate will take care of the truncate later. JRA.
588 */
589
590 local_flags &= ~O_TRUNC;
591
592 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
593 /*
594 * We would block on opening a FIFO with no one else on the
595 * other end. Do what we used to do and add O_NONBLOCK to the
596 * open flags. JRA.
597 */
598
599 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
600 local_flags |= O_NONBLOCK;
601 }
602 #endif
603
604 /* Don't create files with Microsoft wildcard characters. */
605 if (fsp->base_fsp) {
606 /*
607 * wildcard characters are allowed in stream names
608 * only test the basefilename
609 */
610 wild = fsp->base_fsp->fsp_name->base_name;
611 } else {
612 wild = smb_fname->base_name;
613 }
614 if ((local_flags & O_CREAT) && !file_existed &&
615 ms_has_wild(wild)) {
616 return NT_STATUS_OBJECT_NAME_INVALID;
617 }
618
619 /* Can we access this file ? */
620 if (!fsp->base_fsp) {
621 /* Only do this check on non-stream open. */
622 if (file_existed) {
623 status = smbd_check_access_rights(conn,
624 smb_fname,
625 access_mask);
626 } else if (local_flags & O_CREAT){
627 status = check_parent_access(conn,
628 smb_fname,
629 SEC_DIR_ADD_FILE,
630 NULL);
631 } else {
632 /* File didn't exist and no O_CREAT. */
633 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
634 }
635 if (!NT_STATUS_IS_OK(status)) {
636 DEBUG(10,("open_file: "
637 "%s on file "
638 "%s returned %s\n",
639 file_existed ?
640 "smbd_check_access_rights" :
641 "check_parent_access",
642 smb_fname_str_dbg(smb_fname),
643 nt_errstr(status) ));
644 return status;
645 }
646 }
647
648 /* Actually do the open */
649 status = fd_open(conn, fsp, local_flags, unx_mode);
650 if (!NT_STATUS_IS_OK(status)) {
651 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
652 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
653 nt_errstr(status),local_flags,flags));
654 return status;
655 }
656
657 if ((local_flags & O_CREAT) && !file_existed) {
658 file_created = true;
659 }
660
661 } else {
662 fsp->fh->fd = -1; /* What we used to call a stat open. */
663 if (!file_existed) {
664 /* File must exist for a stat open. */
665 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
666 }
667
668 status = smbd_check_access_rights(conn,
669 smb_fname,
670 access_mask);
671
672 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
673 fsp->posix_open &&
674 S_ISLNK(smb_fname->st.st_ex_mode)) {
675 /* This is a POSIX stat open for delete
676 * or rename on a symlink that points
677 * nowhere. Allow. */
678 DEBUG(10,("open_file: allowing POSIX "
679 "open on bad symlink %s\n",
680 smb_fname_str_dbg(smb_fname)));
681 status = NT_STATUS_OK;
682 }
683
684 if (!NT_STATUS_IS_OK(status)) {
685 DEBUG(10,("open_file: "
686 "smbd_check_access_rights on file "
687 "%s returned %s\n",
688 smb_fname_str_dbg(smb_fname),
689 nt_errstr(status) ));
690 return status;
691 }
692 }
693
694 if (!file_existed) {
695 int ret;
696
697 if (fsp->fh->fd == -1) {
698 ret = SMB_VFS_STAT(conn, smb_fname);
699 } else {
700 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
701 /* If we have an fd, this stat should succeed. */
702 if (ret == -1) {
703 DEBUG(0,("Error doing fstat on open file %s "
704 "(%s)\n",
705 smb_fname_str_dbg(smb_fname),
706 strerror(errno) ));
707 }
708 }
709
710 /* For a non-io open, this stat failing means file not found. JRA */
711 if (ret == -1) {
712 status = map_nt_error_from_unix(errno);
713 fd_close(fsp);
714 return status;
715 }
716
717 if (file_created) {
718 bool need_re_stat = false;
719 /* Do all inheritance work after we've
720 done a successful stat call and filled
721 in the stat struct in fsp->fsp_name. */
722
723 /* Inherit the ACL if required */
724 if (lp_inherit_perms(SNUM(conn))) {
725 inherit_access_posix_acl(conn, parent_dir,
726 smb_fname->base_name,
727 unx_mode);
728 need_re_stat = true;
729 }
730
731 /* Change the owner if required. */
732 if (lp_inherit_owner(SNUM(conn))) {
733 change_file_owner_to_parent(conn, parent_dir,
734 fsp);
735 need_re_stat = true;
736 }
737
738 if (need_re_stat) {
739 if (fsp->fh->fd == -1) {
740 ret = SMB_VFS_STAT(conn, smb_fname);
741 } else {
742 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
743 /* If we have an fd, this stat should succeed. */
744 if (ret == -1) {
745 DEBUG(0,("Error doing fstat on open file %s "
746 "(%s)\n",
747 smb_fname_str_dbg(smb_fname),
748 strerror(errno) ));
749 }
750 }
751 }
752
753 notify_fname(conn, NOTIFY_ACTION_ADDED,
754 FILE_NOTIFY_CHANGE_FILE_NAME,
755 smb_fname->base_name);
756 }
757 }
758
759 /*
760 * POSIX allows read-only opens of directories. We don't
761 * want to do this (we use a different code path for this)
762 * so catch a directory open and return an EISDIR. JRA.
763 */
764
765 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
766 fd_close(fsp);
767 errno = EISDIR;
768 return NT_STATUS_FILE_IS_A_DIRECTORY;
769 }
770
771 fsp->mode = smb_fname->st.st_ex_mode;
772 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
773 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
774 fsp->file_pid = req ? req->smbpid : 0;
775 fsp->can_lock = True;
776 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
777 if (!CAN_WRITE(conn)) {
778 fsp->can_write = False;
779 } else {
780 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
781 True : False;
782 }
783 fsp->print_file = NULL;
784 fsp->modified = False;
785 fsp->sent_oplock_break = NO_BREAK_SENT;
786 fsp->is_directory = False;
787 if (conn->aio_write_behind_list &&
788 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
789 conn->case_sensitive)) {
790 fsp->aio_write_behind = True;
791 }
792
793 fsp->wcp = NULL; /* Write cache pointer. */
794
795 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
796 conn->session_info->unix_info->unix_name,
797 smb_fname_str_dbg(smb_fname),
798 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
799 conn->num_files_open));
800
801 errno = 0;
802 return NT_STATUS_OK;
803 }
804
805 /****************************************************************************
806 Check if we can open a file with a share mode.
807 Returns True if conflict, False if not.
808 ****************************************************************************/
809
810 static bool share_conflict(struct share_mode_entry *entry,
811 uint32 access_mask,
812 uint32 share_access)
813 {
814 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
815 "entry->share_access = 0x%x, "
816 "entry->private_options = 0x%x\n",
817 (unsigned int)entry->access_mask,
818 (unsigned int)entry->share_access,
819 (unsigned int)entry->private_options));
820
821 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
822 (unsigned int)access_mask, (unsigned int)share_access));
823
824 if ((entry->access_mask & (FILE_WRITE_DATA|
825 FILE_APPEND_DATA|
826 FILE_READ_DATA|
827 FILE_EXECUTE|
828 DELETE_ACCESS)) == 0) {
829 DEBUG(10,("share_conflict: No conflict due to "
830 "entry->access_mask = 0x%x\n",
831 (unsigned int)entry->access_mask ));
832 return False;
833 }
834
835 if ((access_mask & (FILE_WRITE_DATA|
836 FILE_APPEND_DATA|
837 FILE_READ_DATA|
838 FILE_EXECUTE|
839 DELETE_ACCESS)) == 0) {
840 DEBUG(10,("share_conflict: No conflict due to "
841 "access_mask = 0x%x\n",
842 (unsigned int)access_mask ));
843 return False;
844 }
845
846 #if 1 /* JRA TEST - Superdebug. */
847 #define CHECK_MASK(num, am, right, sa, share) \
848 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
849 (unsigned int)(num), (unsigned int)(am), \
850 (unsigned int)(right), (unsigned int)(am)&(right) )); \
851 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
852 (unsigned int)(num), (unsigned int)(sa), \
853 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
854 if (((am) & (right)) && !((sa) & (share))) { \
855 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
856 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
857 (unsigned int)(share) )); \
858 return True; \
859 }
860 #else
861 #define CHECK_MASK(num, am, right, sa, share) \
862 if (((am) & (right)) && !((sa) & (share))) { \
863 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
864 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
865 (unsigned int)(share) )); \
866 return True; \
867 }
868 #endif
869
870 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
871 share_access, FILE_SHARE_WRITE);
872 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
873 entry->share_access, FILE_SHARE_WRITE);
874
875 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
876 share_access, FILE_SHARE_READ);
877 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
878 entry->share_access, FILE_SHARE_READ);
879
880 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
881 share_access, FILE_SHARE_DELETE);
882 CHECK_MASK(6, access_mask, DELETE_ACCESS,
883 entry->share_access, FILE_SHARE_DELETE);
884
885 DEBUG(10,("share_conflict: No conflict.\n"));
886 return False;
887 }
888
889 #if defined(DEVELOPER)
890 static void validate_my_share_entries(struct smbd_server_connection *sconn,
891 int num,
892 struct share_mode_entry *share_entry)
893 {
894 files_struct *fsp;
895
896 if (!procid_is_me(&share_entry->pid)) {
897 return;
898 }
899
900 if (is_deferred_open_entry(share_entry) &&
901 !open_was_deferred(sconn, share_entry->op_mid)) {
902 char *str = talloc_asprintf(talloc_tos(),
903 "Got a deferred entry without a request: "
904 "PANIC: %s\n",
905 share_mode_str(talloc_tos(), num, share_entry));
906 smb_panic(str);
907 }
908
909 if (!is_valid_share_mode_entry(share_entry)) {
910 return;
911 }
912
913 fsp = file_find_dif(sconn, share_entry->id,
914 share_entry->share_file_id);
915 if (!fsp) {
916 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
917 share_mode_str(talloc_tos(), num, share_entry) ));
918 smb_panic("validate_my_share_entries: Cannot match a "
919 "share entry with an open file\n");
920 }
921
922 if (is_deferred_open_entry(share_entry)) {
923 goto panic;
924 }
925
926 if ((share_entry->op_type == NO_OPLOCK) &&
927 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
928 /* Someone has already written to it, but I haven't yet
929 * noticed */
930 return;
931 }
932
933 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
934 goto panic;
935 }
936
937 return;
938
939 panic:
940 {
941 char *str;
942 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
943 share_mode_str(talloc_tos(), num, share_entry) ));
944 str = talloc_asprintf(talloc_tos(),
945 "validate_my_share_entries: "
946 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
947 fsp->fsp_name->base_name,
948 (unsigned int)fsp->oplock_type,
949 (unsigned int)share_entry->op_type );
950 smb_panic(str);
951 }
952 }
953 #endif
954
955 bool is_stat_open(uint32 access_mask)
956 {
957 return (access_mask &&
958 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
959 FILE_WRITE_ATTRIBUTES))==0) &&
960 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
961 FILE_WRITE_ATTRIBUTES)) != 0));
962 }
963
964 /****************************************************************************
965 Deal with share modes
966 Invarient: Share mode must be locked on entry and exit.
967 Returns -1 on error, or number of share modes on success (may be zero).
968 ****************************************************************************/
969
970 static NTSTATUS open_mode_check(connection_struct *conn,
971 struct share_mode_lock *lck,
972 uint32_t name_hash,
973 uint32 access_mask,
974 uint32 share_access,
975 uint32 create_options,
976 bool *file_existed)
977 {
978 int i;
979
980 if(lck->num_share_modes == 0) {
981 return NT_STATUS_OK;
982 }
983
984 *file_existed = True;
985
986 /* A delete on close prohibits everything */
987
988 if (is_delete_on_close_set(lck, name_hash)) {
989 return NT_STATUS_DELETE_PENDING;
990 }
991
992 if (is_stat_open(access_mask)) {
993 /* Stat open that doesn't trigger oplock breaks or share mode
994 * checks... ! JRA. */
995 return NT_STATUS_OK;
996 }
997
998 /*
999 * Check if the share modes will give us access.
1000 */
1001
1002 #if defined(DEVELOPER)
1003 for(i = 0; i < lck->num_share_modes; i++) {
1004 validate_my_share_entries(conn->sconn, i,
1005 &lck->share_modes[i]);
1006 }
1007 #endif
1008
1009 if (!lp_share_modes(SNUM(conn))) {
1010 return NT_STATUS_OK;
1011 }
1012
1013 /* Now we check the share modes, after any oplock breaks. */
1014 for(i = 0; i < lck->num_share_modes; i++) {
1015
1016 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1017 continue;
1018 }
1019
1020 /* someone else has a share lock on it, check to see if we can
1021 * too */
1022 if (share_conflict(&lck->share_modes[i],
1023 access_mask, share_access)) {
1024 return NT_STATUS_SHARING_VIOLATION;
1025 }
1026 }
1027
1028 return NT_STATUS_OK;
1029 }
1030
1031 static bool is_delete_request(files_struct *fsp) {
1032 return ((fsp->access_mask == DELETE_ACCESS) &&
1033 (fsp->oplock_type == NO_OPLOCK));
1034 }
1035
1036 /*
1037 * Send a break message to the oplock holder and delay the open for
1038 * our client.
1039 */
1040
1041 static NTSTATUS send_break_message(files_struct *fsp,
1042 struct share_mode_entry *exclusive,
1043 uint64_t mid,
1044 int oplock_request)
1045 {
1046 NTSTATUS status;
1047 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1048
1049 DEBUG(10, ("Sending break request to PID %s\n",
1050 procid_str_static(&exclusive->pid)));
1051 exclusive->op_mid = mid;
1052
1053 /* Create the message. */
1054 share_mode_entry_to_message(msg, exclusive);
1055
1056 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1057 don't want this set in the share mode struct pointed to by lck. */
1058
1059 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1060 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1061 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1062 }
1063
1064 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1065 MSG_SMB_BREAK_REQUEST,
1066 (uint8 *)msg,
1067 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1068 if (!NT_STATUS_IS_OK(status)) {
1069 DEBUG(3, ("Could not send oplock break message: %s\n",
1070 nt_errstr(status)));
1071 }
1072
1073 return status;
1074 }
1075
1076 /*
1077 * Return share_mode_entry pointers for :
1078 * 1). Batch oplock entry.
1079 * 2). Batch or exclusive oplock entry (may be identical to #1).
1080 * bool have_level2_oplock
1081 * bool have_no_oplock.
1082 * Do internal consistency checks on the share mode for a file.
1083 */
1084
1085 static void find_oplock_types(files_struct *fsp,
1086 int oplock_request,
1087 struct share_mode_lock *lck,
1088 struct share_mode_entry **pp_batch,
1089 struct share_mode_entry **pp_ex_or_batch,
1090 bool *got_level2,
1091 bool *got_no_oplock)
1092 {
1093 int i;
1094
1095 *pp_batch = NULL;
1096 *pp_ex_or_batch = NULL;
1097 *got_level2 = false;
1098 *got_no_oplock = false;
1099
1100 /* Ignore stat or internal opens, as is done in
1101 delay_for_batch_oplocks() and
1102 delay_for_exclusive_oplocks().
1103 */
1104 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1105 return;
1106 }
1107
1108 for (i=0; i<lck->num_share_modes; i++) {
1109 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1110 continue;
1111 }
1112
1113 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1114 is_stat_open(lck->share_modes[i].access_mask)) {
1115 /* We ignore stat opens in the table - they
1116 always have NO_OPLOCK and never get or
1117 cause breaks. JRA. */
1118 continue;
1119 }
1120
1121 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1122 /* batch - can only be one. */
1123 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1124 smb_panic("Bad batch oplock entry.");
1125 }
1126 *pp_batch = &lck->share_modes[i];
1127 }
1128
1129 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1130 /* Exclusive or batch - can only be one. */
1131 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1132 smb_panic("Bad exclusive or batch oplock entry.");
1133 }
1134 *pp_ex_or_batch = &lck->share_modes[i];
1135 }
1136
1137 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1138 if (*pp_batch || *pp_ex_or_batch) {
1139 smb_panic("Bad levelII oplock entry.");
1140 }
1141 *got_level2 = true;
1142 }
1143
1144 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1145 if (*pp_batch || *pp_ex_or_batch) {
1146 smb_panic("Bad no oplock entry.");
1147 }
1148 *got_no_oplock = true;
1149 }
1150 }
1151 }
1152
1153 static bool delay_for_batch_oplocks(files_struct *fsp,
1154 uint64_t mid,
1155 int oplock_request,
1156 struct share_mode_entry *batch_entry)
1157 {
1158 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1159 return false;
1160 }
1161 if (batch_entry == NULL) {
1162 return false;
1163 }
1164
1165 /* Found a batch oplock */
1166 send_break_message(fsp, batch_entry, mid, oplock_request);
1167 return true;
1168 }
1169
1170 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1171 uint64_t mid,
1172 int oplock_request,
1173 struct share_mode_entry *ex_entry)
1174 {
1175 bool delay_it;
1176
1177 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1178 return false;
1179 }
1180 if (ex_entry == NULL) {
1181 return false;
1182 }
1183
1184 /* Found an exclusive or batch oplock */
1185
1186 delay_it = is_delete_request(fsp) ?
1187 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1188
1189 if (!delay_it) {
1190 return false;
1191 }
1192
1193 send_break_message(fsp, ex_entry, mid, oplock_request);
1194 return true;
1195 }
1196
1197 static void grant_fsp_oplock_type(files_struct *fsp,
1198 const struct byte_range_lock *br_lck,
1199 int oplock_request,
1200 bool got_level2_oplock,
1201 bool got_a_none_oplock)
1202 {
1203 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1204 lp_level2_oplocks(SNUM(fsp->conn));
1205
1206 /* Start by granting what the client asked for,
1207 but ensure no SAMBA_PRIVATE bits can be set. */
1208 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1209
1210 if (oplock_request & INTERNAL_OPEN_ONLY) {
1211 /* No oplocks on internal open. */
1212 fsp->oplock_type = NO_OPLOCK;
1213 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1214 fsp->oplock_type, fsp_str_dbg(fsp)));
1215 return;
1216 } else if (br_lck && br_lck->num_locks > 0) {
1217 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1218 fsp_str_dbg(fsp)));
1219 fsp->oplock_type = NO_OPLOCK;
1220 }
1221
1222 if (is_stat_open(fsp->access_mask)) {
1223 /* Leave the value already set. */
1224 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1225 fsp->oplock_type, fsp_str_dbg(fsp)));
1226 return;
1227 }
1228
1229 /*
1230 * Match what was requested (fsp->oplock_type) with
1231 * what was found in the existing share modes.
1232 */
1233
1234 if (got_a_none_oplock) {
1235 fsp->oplock_type = NO_OPLOCK;
1236 } else if (got_level2_oplock) {
1237 if (fsp->oplock_type == NO_OPLOCK ||
1238 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1239 /* Store a level2 oplock, but don't tell the client */
1240 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1241 } else {
1242 fsp->oplock_type = LEVEL_II_OPLOCK;
1243 }
1244 } else {
1245 /* All share_mode_entries are placeholders or deferred.
1246 * Silently upgrade to fake levelII if the client didn't
1247 * ask for an oplock. */
1248 if (fsp->oplock_type == NO_OPLOCK) {
1249 /* Store a level2 oplock, but don't tell the client */
1250 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1251 }
1252 }
1253
1254 /*
1255 * Don't grant level2 to clients that don't want them
1256 * or if we've turned them off.
1257 */
1258 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1259 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1260 }
1261
1262 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1263 fsp->oplock_type, fsp_str_dbg(fsp)));
1264 }
1265
1266 bool request_timed_out(struct timeval request_time,
1267 struct timeval timeout)
1268 {
1269 struct timeval now, end_time;
1270 GetTimeOfDay(&now);
1271 end_time = timeval_sum(&request_time, &timeout);
1272 return (timeval_compare(&end_time, &now) < 0);
1273 }
1274
1275 /****************************************************************************
1276 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1277 ****************************************************************************/
1278
1279 static void defer_open(struct share_mode_lock *lck,
1280 struct timeval request_time,
1281 struct timeval timeout,
1282 struct smb_request *req,
1283 struct deferred_open_record *state)
1284 {
1285 int i;
1286
1287 /* Paranoia check */
1288
1289 for (i=0; i<lck->num_share_modes; i++) {
1290 struct share_mode_entry *e = &lck->share_modes[i];
1291
1292 if (is_deferred_open_entry(e) &&
1293 procid_is_me(&e->pid) &&
1294 (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 /*
1508 * Never test FILE_READ_ATTRIBUTES. se_access_check()
1509 * also takes care of owner WRITE_DAC and READ_CONTROL.
1510 */
1511 status = se_access_check(sd,
1512 get_current_nttok(conn),
1513 (access_mask & ~FILE_READ_ATTRIBUTES),
1514 &access_granted);
1515
1516 TALLOC_FREE(sd);
1517
1518 if (!NT_STATUS_IS_OK(status)) {
1519 DEBUG(10, ("smbd_calculate_access_mask: "
1520 "Access denied on file %s: "
1521 "when calculating maximum access\n",
1522 smb_fname_str_dbg(smb_fname)));
1523 return NT_STATUS_ACCESS_DENIED;
1524 }
1525
1526 access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1527 } else {
1528 access_mask = FILE_GENERIC_ALL;
1529 }
1530
1531 access_mask &= conn->share_access;
1532 }
1533
1534 rejected_share_access = access_mask & ~(conn->share_access);
1535
1536 if (rejected_share_access) {
1537 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1538 "file %s: rejected by share access mask[0x%08X] "
1539 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1540 smb_fname_str_dbg(smb_fname),
1541 conn->share_access,
1542 orig_access_mask, access_mask,
1543 rejected_share_access));
1544 return NT_STATUS_ACCESS_DENIED;
1545 }
1546
1547 *access_mask_out = access_mask;
1548 return NT_STATUS_OK;
1549 }
1550
1551 /****************************************************************************
1552 Remove the deferred open entry under lock.
1553 ****************************************************************************/
1554
1555 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1556 struct server_id pid)
1557 {
1558 struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1559 NULL, NULL, NULL);
1560 if (lck == NULL) {
1561 DEBUG(0, ("could not get share mode lock\n"));
1562 return;
1563 }
1564 del_deferred_open_entry(lck, mid, pid);
1565 TALLOC_FREE(lck);
1566 }
1567
1568 /****************************************************************
1569 Ensure we get the brlock lock followed by the share mode lock
1570 in the correct order to prevent deadlocks if other smbd's are
1571 using the brlock database on this file simultaneously with this open
1572 (that code also gets the locks in brlock -> share mode lock order).
1573 ****************************************************************/
1574
1575 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1576 files_struct *fsp,
1577 const struct file_id id,
1578 const char *connectpath,
1579 const struct smb_filename *smb_fname,
1580 const struct timespec *p_old_write_time,
1581 struct share_mode_lock **p_lck,
1582 struct byte_range_lock **p_br_lck)
1583 {
1584 /* Ordering - we must get the br_lck for this
1585 file before the share mode. */
1586 if (lp_locking(fsp->conn->params)) {
1587 *p_br_lck = brl_get_locks_readonly(fsp);
1588 if (*p_br_lck == NULL) {
1589 DEBUG(0, ("Could not get br_lock\n"));
1590 return false;
1591 }
1592 /* Note - we don't need to free the returned
1593 br_lck explicitly as it was allocated on talloc_tos()
1594 and so will be autofreed (and release the lock)
1595 once the frame context disappears.
1596
1597 If it was set to fsp->brlock_rec then it was
1598 talloc_move'd to hang off the fsp pointer and
1599 in this case is guarenteed to not be holding the
1600 lock on the brlock database. */
1601 }
1602
1603 *p_lck = get_share_mode_lock(mem_ctx,
1604 id,
1605 connectpath,
1606 smb_fname,
1607 p_old_write_time);
1608
1609 if (*p_lck == NULL) {
1610 DEBUG(0, ("Could not get share mode lock\n"));
1611 TALLOC_FREE(*p_br_lck);
1612 return false;
1613 }
1614 return true;
1615 }
1616
1617 /****************************************************************************
1618 Open a file with a share mode. Passed in an already created files_struct *.
1619 ****************************************************************************/
1620
1621 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1622 struct smb_request *req,
1623 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1624 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1625 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1626 uint32 create_options, /* options such as delete on close. */
1627 uint32 new_dos_attributes, /* attributes used for new file. */
1628 int oplock_request, /* internal Samba oplock codes. */
1629 /* Information (FILE_EXISTS etc.) */
1630 uint32_t private_flags, /* Samba specific flags. */
1631 int *pinfo,
1632 files_struct *fsp)
1633 {
1634 struct smb_filename *smb_fname = fsp->fsp_name;
1635 int flags=0;
1636 int flags2=0;
1637 bool file_existed = VALID_STAT(smb_fname->st);
1638 bool def_acl = False;
1639 bool posix_open = False;
1640 bool new_file_created = False;
1641 bool clear_ads = false;
1642 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1643 mode_t new_unx_mode = (mode_t)0;
1644 mode_t unx_mode = (mode_t)0;
1645 int info;
1646 uint32 existing_dos_attributes = 0;
1647 struct timeval request_time = timeval_zero();
1648 struct share_mode_lock *lck = NULL;
1649 uint32 open_access_mask = access_mask;
1650 NTSTATUS status;
1651 char *parent_dir;
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 if (!posix_open) {
1738 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1739 if (file_existed) {
1740 existing_dos_attributes = dos_mode(conn, smb_fname);
1741 }
1742 }
1743
1744 /* ignore any oplock requests if oplocks are disabled */
1745 if (!lp_oplocks(SNUM(conn)) ||
1746 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1747 /* Mask off everything except the private Samba bits. */
1748 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1749 }
1750
1751 /* this is for OS/2 long file names - say we don't support them */
1752 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1753 /* OS/2 Workplace shell fix may be main code stream in a later
1754 * release. */
1755 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1756 "supported.\n"));
1757 if (use_nt_status()) {
1758 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1759 }
1760 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1761 }
1762
1763 switch( create_disposition ) {
1764 /*
1765 * Currently we're using FILE_SUPERSEDE as the same as
1766 * FILE_OVERWRITE_IF but they really are
1767 * different. FILE_SUPERSEDE deletes an existing file
1768 * (requiring delete access) then recreates it.
1769 */
1770 case FILE_SUPERSEDE:
1771 /* If file exists replace/overwrite. If file doesn't
1772 * exist create. */
1773 flags2 |= (O_CREAT | O_TRUNC);
1774 clear_ads = true;
1775 break;
1776
1777 case FILE_OVERWRITE_IF:
1778 /* If file exists replace/overwrite. If file doesn't
1779 * exist create. */
1780 flags2 |= (O_CREAT | O_TRUNC);
1781 clear_ads = true;
1782 break;
1783
1784 case FILE_OPEN:
1785 /* If file exists open. If file doesn't exist error. */
1786 if (!file_existed) {
1787 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1788 "requested for file %s and file "
1789 "doesn't exist.\n",
1790 smb_fname_str_dbg(smb_fname)));
1791 errno = ENOENT;
1792 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1793 }
1794 break;
1795
1796 case FILE_OVERWRITE:
1797 /* If file exists overwrite. If file doesn't exist
1798 * error. */
1799 if (!file_existed) {
1800 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1801 "requested for file %s and file "
1802 "doesn't exist.\n",
1803 smb_fname_str_dbg(smb_fname) ));
1804 errno = ENOENT;
1805 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1806 }
1807 flags2 |= O_TRUNC;
1808 clear_ads = true;
1809 break;
1810
1811 case FILE_CREATE:
1812 /* If file exists error. If file doesn't exist
1813 * create. */
1814 if (file_existed) {
1815 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1816 "requested for file %s and file "
1817 "already exists.\n",
1818 smb_fname_str_dbg(smb_fname)));
1819 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1820 errno = EISDIR;
1821 } else {
1822 errno = EEXIST;
1823 }
1824 return map_nt_error_from_unix(errno);
1825 }
1826 flags2 |= (O_CREAT|O_EXCL);
1827 break;
1828
1829 case FILE_OPEN_IF:
1830 /* If file exists open. If file doesn't exist
1831 * create. */
1832 flags2 |= O_CREAT;
1833 break;
1834
1835 default:
1836 return NT_STATUS_INVALID_PARAMETER;
1837 }
1838
1839 /* We only care about matching attributes on file exists and
1840 * overwrite. */
1841
1842 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1843 (create_disposition == FILE_OVERWRITE_IF))) {
1844 if (!open_match_attributes(conn, existing_dos_attributes,
1845 new_dos_attributes,
1846 smb_fname->st.st_ex_mode,
1847 unx_mode, &new_unx_mode)) {
1848 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1849 "for file %s (%x %x) (0%o, 0%o)\n",
1850 smb_fname_str_dbg(smb_fname),
1851 existing_dos_attributes,
1852 new_dos_attributes,
1853 (unsigned int)smb_fname->st.st_ex_mode,
1854 (unsigned int)unx_mode ));
1855 errno = EACCES;
1856 return NT_STATUS_ACCESS_DENIED;
1857 }
1858 }
1859
1860 status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1861 access_mask,
1862 &access_mask);
1863 if (!NT_STATUS_IS_OK(status)) {
1864 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1865 "on file %s returned %s\n",
1866 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1867 return status;
1868 }
1869
1870 open_access_mask = access_mask;
1871
1872 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1873 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1874 }
1875
1876 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1877 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1878 access_mask));
1879
1880 /*
1881 * Note that we ignore the append flag as append does not
1882 * mean the same thing under DOS and Unix.
1883 */
1884
1885 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1886 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1887 /* DENY_DOS opens are always underlying read-write on the
1888 file handle, no matter what the requested access mask
1889 says. */
1890 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1891 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1892 flags = O_RDWR;
1893 } else {
1894 flags = O_WRONLY;
1895 }
1896 } else {
1897 flags = O_RDONLY;
1898 }
1899
1900 /*
1901 * Currently we only look at FILE_WRITE_THROUGH for create options.
1902 */
1903
1904 #if defined(O_SYNC)
1905 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1906 flags2 |= O_SYNC;
1907 }
1908 #endif /* O_SYNC */
1909
1910 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1911 flags2 |= O_APPEND;
1912 }
1913
1914 if (!posix_open && !CAN_WRITE(conn)) {
1915 /*
1916 * We should really return a permission denied error if either
1917 * O_CREAT or O_TRUNC are set, but for compatibility with
1918 * older versions of Samba we just AND them out.
1919 */
1920 flags2 &= ~(O_CREAT|O_TRUNC);
1921 }
1922
1923 /*
1924 * Ensure we can't write on a read-only share or file.
1925 */
1926
1927 if (flags != O_RDONLY && file_existed &&
1928 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1929 DEBUG(5,("open_file_ntcreate: write access requested for "
1930 "file %s on read only %s\n",
1931 smb_fname_str_dbg(smb_fname),
1932 !CAN_WRITE(conn) ? "share" : "file" ));
1933 errno = EACCES;
1934 return NT_STATUS_ACCESS_DENIED;
1935 }
1936
1937 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1938 fsp->share_access = share_access;
1939 fsp->fh->private_options = private_flags;
1940 fsp->access_mask = open_access_mask; /* We change this to the
1941 * requested access_mask after
1942 * the open is done. */
1943 fsp->posix_open = posix_open;
1944
1945 /* Ensure no SAMBA_PRIVATE bits can be set. */
1946 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1947
1948 if (timeval_is_zero(&request_time)) {
1949 request_time = fsp->open_time;
1950 }
1951
1952 if (file_existed) {
1953 struct byte_range_lock *br_lck = NULL;
1954 struct share_mode_entry *batch_entry = NULL;
1955 struct share_mode_entry *exclusive_entry = NULL;
1956 bool got_level2_oplock = false;
1957 bool got_a_none_oplock = false;
1958 struct file_id id;
1959
1960 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1961 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1962
1963 if (!acquire_ordered_locks(talloc_tos(),
1964 fsp,
1965 id,
1966 conn->connectpath,
1967 smb_fname,
1968 &old_write_time,
1969 &lck,
1970 &br_lck)) {
1971 return NT_STATUS_SHARING_VIOLATION;
1972 }
1973
1974 /* Get the types we need to examine. */
1975 find_oplock_types(fsp,
1976 oplock_request,
1977 lck,
1978 &batch_entry,
1979 &exclusive_entry,
1980 &got_level2_oplock,
1981 &got_a_none_oplock);
1982
1983 /* First pass - send break only on batch oplocks. */
1984 if ((req != NULL) &&
1985 delay_for_batch_oplocks(fsp,
1986 req->mid,
1987 oplock_request,
1988 batch_entry)) {
1989 schedule_defer_open(lck, request_time, req);
1990 TALLOC_FREE(lck);
1991 return NT_STATUS_SHARING_VIOLATION;
1992 }
1993
1994 /* Use the client requested access mask here, not the one we
1995 * open with. */
1996 status = open_mode_check(conn, lck, fsp->name_hash,
1997 access_mask, share_access,
1998 create_options, &file_existed);
1999
2000 if (NT_STATUS_IS_OK(status)) {
2001 /* We might be going to allow this open. Check oplock
2002 * status again. */
2003 /* Second pass - send break for both batch or
2004 * exclusive oplocks. */
2005 if ((req != NULL) &&
2006 delay_for_exclusive_oplocks(
2007 fsp,
2008 req->mid,
2009 oplock_request,
2010 exclusive_entry)) {
2011 schedule_defer_open(lck, request_time, req);
2012 TALLOC_FREE(lck);
2013 return NT_STATUS_SHARING_VIOLATION;
2014 }
2015 }
2016
2017 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2018 /* DELETE_PENDING is not deferred for a second */
2019 TALLOC_FREE(lck);
2020 return status;
2021 }
2022
2023 grant_fsp_oplock_type(fsp,
2024 br_lck,
2025 oplock_request,
2026 got_level2_oplock,
2027 got_a_none_oplock);
2028
2029 if (!NT_STATUS_IS_OK(status)) {
2030 uint32 can_access_mask;
2031 bool can_access = True;
2032
2033 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2034
2035 /* Check if this can be done with the deny_dos and fcb
2036 * calls. */
2037 if (private_flags &
2038 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2039 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2040 if (req == NULL) {
2041 DEBUG(0, ("DOS open without an SMB "
2042 "request!\n"));
2043 TALLOC_FREE(lck);
2044 return NT_STATUS_INTERNAL_ERROR;
2045 }
2046
2047 /* Use the client requested access mask here,
2048 * not the one we open with. */
2049 status = fcb_or_dos_open(req,
2050 conn,
2051 fsp,
2052 smb_fname,
2053 id,
2054 req->smbpid,
2055 req->vuid,
2056 access_mask,
2057 share_access,
2058 create_options);
2059
2060 if (NT_STATUS_IS_OK(status)) {
2061 TALLOC_FREE(lck);
2062 if (pinfo) {
2063 *pinfo = FILE_WAS_OPENED;
2064 }
2065 return NT_STATUS_OK;
2066 }
2067 }
2068
2069 /*
2070 * This next line is a subtlety we need for
2071 * MS-Access. If a file open will fail due to share
2072 * permissions and also for security (access) reasons,
2073 * we need to return the access failed error, not the
2074 * share error. We can't open the file due to kernel
2075 * oplock deadlock (it's possible we failed above on
2076 * the open_mode_check()) so use a userspace check.
2077 */
2078
2079 if (flags & O_RDWR) {
2080 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2081 } else if (flags & O_WRONLY) {
2082 can_access_mask = FILE_WRITE_DATA;
2083 } else {
2084 can_access_mask = FILE_READ_DATA;
2085 }
2086
2087 if (((can_access_mask & FILE_WRITE_DATA) &&
2088 !CAN_WRITE(conn)) ||
2089 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2090 smb_fname, can_access_mask))) {
2091 can_access = False;
2092 }
2093
2094 /*
2095 * If we're returning a share violation, ensure we
2096 * cope with the braindead 1 second delay.
2097 */
2098
2099 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2100 lp_defer_sharing_violations()) {
2101 struct timeval timeout;
2102 struct deferred_open_record state;
2103 int timeout_usecs;
2104
2105 /* this is a hack to speed up torture tests
2106 in 'make test' */
2107 timeout_usecs = lp_parm_int(SNUM(conn),
2108 "smbd","sharedelay",
2109 SHARING_VIOLATION_USEC_WAIT);
2110
2111 /* This is a relative time, added to the absolute
2112 request_time value to get the absolute timeout time.
2113 Note that if this is the second or greater time we enter
2114 this codepath for this particular request mid then
2115 request_time is left as the absolute time of the *first*
2116 time this request mid was processed. This is what allows
2117 the request to eventually time out. */
2118
2119 timeout = timeval_set(0, timeout_usecs);
2120
2121 /* Nothing actually uses state.delayed_for_oplocks
2122 but it's handy to differentiate in debug messages
2123 between a 30 second delay due to oplock break, and
2124 a 1 second delay for share mode conflicts. */
2125
2126 state.delayed_for_oplocks = False;
2127 state.id = id;
2128
2129 if ((req != NULL)
2130 && !request_timed_out(request_time,
2131 timeout)) {
2132 defer_open(lck, request_time, timeout,
2133 req, &state);
2134 }
2135 }
2136
2137 TALLOC_FREE(lck);
2138 if (can_access) {
2139 /*
2140 * We have detected a sharing violation here
2141 * so return the correct error code
2142 */
2143 status = NT_STATUS_SHARING_VIOLATION;
2144 } else {
2145 status = NT_STATUS_ACCESS_DENIED;
2146 }
2147 return status;
2148 }
2149
2150 /*
2151 * We exit this block with the share entry *locked*.....
2152 */
2153 }
2154
2155 SMB_ASSERT(!file_existed || (lck != NULL));
2156
2157 /*
2158 * Ensure we pay attention to default ACLs on directories if required.
2159 */
2160
2161 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2162 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2163 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2164 }
2165
2166 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2167 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2168 (unsigned int)flags, (unsigned int)flags2,
2169 (unsigned int)unx_mode, (unsigned int)access_mask,
2170 (unsigned int)open_access_mask));
2171
2172 /*
2173 * open_file strips any O_TRUNC flags itself.
2174 */
2175
2176 fsp_open = open_file(fsp, conn, req, parent_dir,
2177 flags|flags2, unx_mode, access_mask,
2178 open_access_mask);
2179
2180 if (!NT_STATUS_IS_OK(fsp_open)) {
2181 TALLOC_FREE(lck);
2182 return fsp_open;
2183 }
2184
2185 if (!file_existed) {
2186 struct byte_range_lock *br_lck = NULL;
2187 struct share_mode_entry *batch_entry = NULL;
2188 struct share_mode_entry *exclusive_entry = NULL;
2189 bool got_level2_oplock = false;
2190 bool got_a_none_oplock = false;
2191 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2192 struct file_id id;
2193 /*
2194 * Deal with the race condition where two smbd's detect the
2195 * file doesn't exist and do the create at the same time. One
2196 * of them will win and set a share mode, the other (ie. this
2197 * one) should check if the requested share mode for this
2198 * create is allowed.
2199 */
2200
2201 /*
2202 * Now the file exists and fsp is successfully opened,
2203 * fsp->dev and fsp->inode are valid and should replace the
2204 * dev=0,inode=0 from a non existent file. Spotted by
2205 * Nadav Danieli <nadavd@exanet.com>. JRA.
2206 */
2207
2208 id = fsp->file_id;
2209
2210 if (!acquire_ordered_locks(talloc_tos(),
2211 fsp,
2212 id,
2213 conn->connectpath,
2214 smb_fname,
2215 &old_write_time,
2216 &lck,
2217 &br_lck)) {
2218 return NT_STATUS_SHARING_VIOLATION;
2219 }
2220
2221 /* Get the types we need to examine. */
2222 find_oplock_types(fsp,
2223 oplock_request,
2224 lck,
2225 &batch_entry,
2226 &exclusive_entry,
2227 &got_level2_oplock,
2228 &got_a_none_oplock);
2229
2230 /* First pass - send break only on batch oplocks. */
2231 if ((req != NULL) &&
2232 delay_for_batch_oplocks(fsp,
2233 req->mid,
2234 oplock_request,
2235 batch_entry)) {
2236 schedule_defer_open(lck, request_time, req);
2237 TALLOC_FREE(lck);
2238 fd_close(fsp);
2239 return NT_STATUS_SHARING_VIOLATION;
2240 }
2241
2242 status = open_mode_check(conn, lck, fsp->name_hash,
2243 access_mask, share_access,
2244 create_options, &file_existed);
2245
2246 if (NT_STATUS_IS_OK(status)) {
2247 /* We might be going to allow this open. Check oplock
2248 * status again. */
2249 /* Second pass - send break for both batch or
2250 * exclusive oplocks. */
2251 if ((req != NULL) &&
2252 delay_for_exclusive_oplocks(
2253 fsp,
2254 req->mid,
2255 oplock_request,
2256 exclusive_entry)) {
2257 schedule_defer_open(lck, request_time, req);
2258 TALLOC_FREE(lck);
2259 fd_close(fsp);
2260 return NT_STATUS_SHARING_VIOLATION;
2261 }
2262 }
2263
2264 if (!NT_STATUS_IS_OK(status)) {
2265 struct deferred_open_record state;
2266
2267 state.delayed_for_oplocks = False;
2268 state.id = id;
2269
2270 /* Do it all over again immediately. In the second
2271 * round we will find that the file existed and handle
2272 * the DELETE_PENDING and FCB cases correctly. No need
2273 * to duplicate the code here. Essentially this is a
2274 * "goto top of this function", but don't tell
2275 * anybody... */
2276
2277 if (req != NULL) {
2278 defer_open(lck, request_time, timeval_zero(),
2279 req, &state);
2280 }
2281 TALLOC_FREE(lck);
2282 fd_close(fsp);
2283 return status;
2284 }
2285
2286 grant_fsp_oplock_type(fsp,
2287 br_lck,
2288 oplock_request,
2289 got_level2_oplock,
2290 got_a_none_oplock);
2291
2292 /*
2293 * We exit this block with the share entry *locked*.....
2294 */
2295
2296 }
2297
2298 SMB_ASSERT(lck != NULL);
2299
2300 /* Delete streams if create_disposition requires it */
2301 if (file_existed && clear_ads &&
2302 !is_ntfs_stream_smb_fname(smb_fname)) {
2303 status = delete_all_streams(conn, smb_fname->base_name);
2304 if (!NT_STATUS_IS_OK(status)) {
2305 TALLOC_FREE(lck);
2306 fd_close(fsp);
2307 return status;
2308 }
2309 }
2310
2311 /* note that we ignore failure for the following. It is
2312 basically a hack for NFS, and NFS will never set one of
2313 these only read them. Nobody but Samba can ever set a deny
2314 mode and we have already checked our more authoritative
2315 locking database for permission to set this deny mode. If
2316 the kernel refuses the operations then the kernel is wrong.
2317 note that GPFS supports it as well - jmcd */
2318
2319 if (fsp->fh->fd != -1) {
2320 int ret_flock;
2321 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2322 if(ret_flock == -1 ){
2323
2324 TALLOC_FREE(lck);
2325 fd_close(fsp);
2326
2327 return NT_STATUS_SHARING_VIOLATION;
2328 }
2329 }
2330
2331 /*
2332 * At this point onwards, we can guarentee that the share entry
2333 * is locked, whether we created the file or not, and that the
2334 * deny mode is compatible with all current opens.
2335 */
2336
2337 /*
2338 * If requested, truncate the file.
2339 */
2340
2341 if (file_existed && (flags2&O_TRUNC)) {
2342 /*
2343 * We are modifing the file after open - update the stat
2344 * struct..
2345 */
2346 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2347 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2348 status = map_nt_error_from_unix(errno);
2349 TALLOC_FREE(lck);
2350 fd_close(fsp);
2351 return status;
2352 }
2353 }
2354
2355 /*
2356 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2357 * but we don't have to store this - just ignore it on access check.
2358 */
2359 if (conn->sconn->using_smb2) {
2360 /*
2361 * SMB2 doesn't return it (according to Microsoft tests).
2362 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2363 * File created with access = 0x7 (Read, Write, Delete)
2364 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2365 */
2366 fsp->access_mask = access_mask;
2367 } else {
2368 /* But SMB1 does. */
2369 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2370 }
2371
2372 if (file_existed) {
2373 /* stat opens on existing files don't get oplocks. */
2374 if (is_stat_open(open_access_mask)) {
2375 fsp->oplock_type = NO_OPLOCK;
2376 }
2377
2378 if (flags2 & O_TRUNC) {
2379 info = FILE_WAS_OVERWRITTEN;
2380 } else {
2381 info = FILE_WAS_OPENED;
2382 }
2383 } else {
2384 info = FILE_WAS_CREATED;
2385 }
2386
2387 if (pinfo) {
2388 *pinfo = info;
2389 }
2390
2391 /*
2392 * Setup the oplock info in both the shared memory and
2393 * file structs.
2394 */
2395
2396 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2397 /*
2398 * Could not get the kernel oplock or there are byte-range
2399 * locks on the file.
2400 */
2401 fsp->oplock_type = NO_OPLOCK;
2402 }
2403
2404 set_share_mode(lck, fsp, get_current_uid(conn),
2405 req ? req->mid : 0,
2406 fsp->oplock_type);
2407
2408 /* Handle strange delete on close create semantics. */
2409 if (create_options & FILE_DELETE_ON_CLOSE) {
2410
2411 status = can_set_delete_on_close(fsp, new_dos_attributes);
2412
2413 if (!NT_STATUS_IS_OK(status)) {
2414 /* Remember to delete the mode we just added. */
2415 del_share_mode(lck, fsp);
2416 TALLOC_FREE(lck);
2417 fd_close(fsp);
2418 return status;
2419 }
2420 /* Note that here we set the *inital* delete on close flag,
2421 not the regular one. The magic gets handled in close. */
2422 fsp->initial_delete_on_close = True;
2423 }
2424
2425 if (info == FILE_WAS_OVERWRITTEN
2426 || info == FILE_WAS_CREATED
2427 || info == FILE_WAS_SUPERSEDED) {
2428 new_file_created = True;
2429 }
2430
2431 if (new_file_created) {
2432 /* Files should be initially set as archive */
2433 if (lp_map_archive(SNUM(conn)) ||
2434 lp_store_dos_attributes(SNUM(conn))) {
2435 if (!posix_open) {
2436 if (file_set_dosmode(conn, smb_fname,
2437 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2438 parent_dir, true) == 0) {
2439 unx_mode = smb_fname->st.st_ex_mode;
2440 }
2441 }
2442 }
2443 }
2444
2445 /* Determine sparse flag. */
2446 if (posix_open) {
2447 /* POSIX opens are sparse by default. */
2448 fsp->is_sparse = true;
2449 } else {
2450 fsp->is_sparse = (file_existed &&
2451 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2452 }
2453
2454 /*
2455 * Take care of inherited ACLs on created files - if default ACL not
2456 * selected.
2457 */
2458
2459 if (!posix_open && !file_existed && !def_acl) {
2460
2461 int saved_errno = errno; /* We might get ENOSYS in the next
2462 * call.. */
2463
2464 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2465 errno == ENOSYS) {
2466 errno = saved_errno; /* Ignore ENOSYS */
2467 }
2468
2469 } else if (new_unx_mode) {
2470
2471 int ret = -1;
2472
2473 /* Attributes need changing. File already existed. */
2474
2475 {
2476 int saved_errno = errno; /* We might get ENOSYS in the
2477 * next call.. */
2478 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2479
2480 if (ret == -1 && errno == ENOSYS) {
2481 errno = saved_errno; /* Ignore ENOSYS */
2482 } else {
2483 DEBUG(5, ("open_file_ntcreate: reset "
2484 "attributes of file %s to 0%o\n",
2485 smb_fname_str_dbg(smb_fname),
2486 (unsigned int)new_unx_mode));
2487 ret = 0; /* Don't do the fchmod below. */
2488 }
2489 }
2490
2491 if ((ret == -1) &&
2492 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2493 DEBUG(5, ("open_file_ntcreate: failed to reset "
2494 "attributes of file %s to 0%o\n",
2495 smb_fname_str_dbg(smb_fname),
2496 (unsigned int)new_unx_mode));
2497 }
2498
2499 /* If this is a successful open, we must remove any deferred open
2500 * records. */
2501 if (req != NULL) {
2502 del_deferred_open_entry(lck, req->mid,
2503 sconn_server_id(req->sconn));
2504 }
2505 TALLOC_FREE(lck);
2506
2507 return NT_STATUS_OK;
2508 }
2509
2510
2511 /****************************************************************************
2512 Open a file for for write to ensure that we can fchmod it.
2513 ****************************************************************************/
2514
2515 NTSTATUS open_file_fchmod(connection_struct *conn,
2516 struct smb_filename *smb_fname,
2517 files_struct **result)
2518 {
2519 if (!VALID_STAT(smb_fname->st)) {
2520 return NT_STATUS_INVALID_PARAMETER;
2521 }
2522
2523 return SMB_VFS_CREATE_FILE(
2524 conn, /* conn */
2525 NULL, /* req */
2526 0, /* root_dir_fid */
2527 smb_fname, /* fname */
2528 FILE_WRITE_DATA, /* access_mask */
2529 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2530 FILE_SHARE_DELETE),
2531 FILE_OPEN, /* create_disposition*/
2532 0, /* create_options */
2533 0, /* file_attributes */
2534 INTERNAL_OPEN_ONLY, /* oplock_request */
2535 0, /* allocation_size */
2536 0, /* private_flags */
2537 NULL, /* sd */
2538 NULL, /* ea_list */
2539 result, /* result */
2540 NULL); /* pinfo */
2541 }
2542
2543 static NTSTATUS mkdir_internal(connection_struct *conn,
2544 struct smb_filename *smb_dname,
2545 uint32 file_attributes)
2546 {
2547 mode_t mode;
2548 char *parent_dir = NULL;
2549 NTSTATUS status;
2550 bool posix_open = false;
2551 bool need_re_stat = false;
2552 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2553
2554 if(access_mask & ~(conn->share_access)) {
2555 DEBUG(5,("mkdir_internal: failing share access "
2556 "%s\n", lp_servicename(SNUM(conn))));
2557 return NT_STATUS_ACCESS_DENIED;
2558 }
2559
2560 status = check_name(conn, smb_dname->base_name);
2561 if (!NT_STATUS_IS_OK(status)) {
2562 return status;
2563 }
2564
2565 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2566 NULL)) {
2567 return NT_STATUS_NO_MEMORY;
2568 }
2569
2570 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2571 posix_open = true;
2572 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2573 } else {
2574 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2575 }
2576
2577 status = check_parent_access(conn,
2578 smb_dname,
2579 access_mask,
2580 &parent_dir);
2581 if(!NT_STATUS_IS_OK(status)) {
2582 DEBUG(5,("mkdir_internal: check_parent_access "
2583 "on directory %s for path %s returned %s\n",
2584 parent_dir,
2585 smb_dname->base_name,
2586 nt_errstr(status) ));
2587 return status;
2588 }
2589
2590 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2591 return map_nt_error_from_unix(errno);
2592 }
2593
2594 /* Ensure we're checking for a symlink here.... */
2595 /* We don't want to get caught by a symlink racer. */
2596
2597 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2598 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2599 smb_fname_str_dbg(smb_dname), strerror(errno)));
2600 return map_nt_error_from_unix(errno);
2601 }
2602
2603 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2604 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2605 smb_fname_str_dbg(smb_dname)));
2606 return NT_STATUS_NOT_A_DIRECTORY;
2607 }
2608
2609 if (lp_store_dos_attributes(SNUM(conn))) {
2610 if (!posix_open) {
2611 file_set_dosmode(conn, smb_dname,
2612 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2613 parent_dir, true);
2614 }
2615 }
2616
2617 if (lp_inherit_perms(SNUM(conn))) {
2618 inherit_access_posix_acl(conn, parent_dir,
2619 smb_dname->base_name, mode);
2620 need_re_stat = true;
2621 }
2622
2623 if (!posix_open) {
2624 /*
2625 * Check if high bits should have been set,
2626 * then (if bits are missing): add them.
2627 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2628 * dir.
2629 */
2630 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2631 (mode & ~smb_dname->st.st_ex_mode)) {
2632 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2633 (smb_dname->st.st_ex_mode |
2634 (mode & ~smb_dname->st.st_ex_mode)));
2635 need_re_stat = true;
2636 }
2637 }
2638
2639 /* Change the owner if required. */
2640 if (lp_inherit_owner(SNUM(conn))) {
2641 change_dir_owner_to_parent(conn, parent_dir,
2642 smb_dname->base_name,
2643 &smb_dname->st);
2644 need_re_stat = true;
2645 }
2646
2647 if (need_re_stat) {
2648 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2649 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2650 smb_fname_str_dbg(smb_dname), strerror(errno)));
2651 return map_nt_error_from_unix(errno);
2652 }
2653 }
2654
2655 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2656 smb_dname->base_name);
2657
2658 return NT_STATUS_OK;
2659 }
2660
2661 /****************************************************************************
2662 Ensure we didn't get symlink raced on opening a directory.
2663 ****************************************************************************/
2664
2665 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2666 const SMB_STRUCT_STAT *sbuf2)
2667 {
2668 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2669 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2670 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2671 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2672 return false;
2673 }
2674 return true;
2675 }
2676
2677 /****************************************************************************
2678 Open a directory from an NT SMB call.
2679 ****************************************************************************/
2680
2681 static NTSTATUS open_directory(connection_struct *conn,
2682 struct smb_request *req,
2683 struct smb_filename *smb_dname,
2684 uint32 access_mask,
2685 uint32 share_access,
2686 uint32 create_disposition,
2687 uint32 create_options,
2688 uint32 file_attributes,
2689 int *pinfo,
2690 files_struct **result)
2691 {
2692 files_struct *fsp = NULL;
2693 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2694 struct share_mode_lock *lck = NULL;
2695 NTSTATUS status;
2696 struct timespec mtimespec;
2697 int info = 0;
2698
2699 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2700
2701 /* Ensure we have a directory attribute. */
2702 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2703
2704 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2705 "share_access = 0x%x create_options = 0x%x, "
2706 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2707 smb_fname_str_dbg(smb_dname),
2708 (unsigned int)access_mask,
2709 (unsigned int)share_access,
2710 (unsigned int)create_options,
2711 (unsigned int)create_disposition,
2712 (unsigned int)file_attributes));
2713
2714 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2715 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2716 is_ntfs_stream_smb_fname(smb_dname)) {
2717 DEBUG(2, ("open_directory: %s is a stream name!\n",
2718 smb_fname_str_dbg(smb_dname)));
2719 return NT_STATUS_NOT_A_DIRECTORY;
2720 }
2721
2722 status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2723 access_mask, &access_mask);
2724 if (!NT_STATUS_IS_OK(status)) {
2725 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2726 "on file %s returned %s\n",
2727 smb_fname_str_dbg(smb_dname),
2728 nt_errstr(status)));
2729 return status;
2730 }
2731
2732 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2733 !security_token_has_privilege(get_current_nttok(conn),
2734 SEC_PRIV_SECURITY)) {
2735 DEBUG(10, ("open_directory: open on %s "
2736 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2737 smb_fname_str_dbg(smb_dname)));
2738 return NT_STATUS_PRIVILEGE_NOT_HELD;
2739 }
2740
2741 switch( create_disposition ) {
2742 case FILE_OPEN:
2743
2744 if (!dir_existed) {
2745 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2746 }
2747
2748 info = FILE_WAS_OPENED;
2749 break;
2750
2751 case FILE_CREATE:
2752
2753 /* If directory exists error. If directory doesn't
2754 * exist create. */
2755
2756 if (dir_existed) {
2757 status = NT_STATUS_OBJECT_NAME_COLLISION;
2758 DEBUG(2, ("open_directory: unable to create "
2759 "%s. Error was %s\n",
2760 smb_fname_str_dbg(smb_dname),
2761 nt_errstr(status)));
2762 return status;
2763 }
2764
2765 status = mkdir_internal(conn, smb_dname,
2766 file_attributes);
2767
2768 if (!NT_STATUS_IS_OK(status)) {
2769 DEBUG(2, ("open_directory: unable to create "
2770 "%s. Error was %s\n",
2771 smb_fname_str_dbg(smb_dname),
2772 nt_errstr(status)));
2773 return status;
2774 }
2775
2776 info = FILE_WAS_CREATED;
2777 break;
2778
2779 case FILE_OPEN_IF:
2780 /*
2781 * If directory exists open. If directory doesn't
2782 * exist create.
2783 */
2784
2785 if (dir_existed) {
2786 status = NT_STATUS_OK;
2787 info = FILE_WAS_OPENED;
2788 } else {
2789 status = mkdir_internal(conn, smb_dname,
2790 file_attributes);
2791
2792 if (NT_STATUS_IS_OK(status)) {
2793 info = FILE_WAS_CREATED;
2794 } else {
2795 /* Cope with create race. */
2796 if (!NT_STATUS_EQUAL(status,
2797 NT_STATUS_OBJECT_NAME_COLLISION)) {
2798 DEBUG(2, ("open_directory: unable to create "
2799 "%s. Error was %s\n",
2800 smb_fname_str_dbg(smb_dname),
2801 nt_errstr(status)));
2802 return status;
2803 }
2804 info = FILE_WAS_OPENED;
2805 }
2806 }
2807
2808 break;
2809
2810 case FILE_SUPERSEDE:
2811 case FILE_OVERWRITE:
2812 case FILE_OVERWRITE_IF:
2813 default:
2814 DEBUG(5,("open_directory: invalid create_disposition "
2815 "0x%x for directory %s\n",
2816 (unsigned int)create_disposition,
2817 smb_fname_str_dbg(smb_dname)));
2818 return NT_STATUS_INVALID_PARAMETER;
2819 }
2820
2821 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2822 DEBUG(5,("open_directory: %s is not a directory !\n",
2823 smb_fname_str_dbg(smb_dname)));
2824 return NT_STATUS_NOT_A_DIRECTORY;
2825 }
2826
2827 if (info == FILE_WAS_OPENED) {
2828 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2829 if (!NT_STATUS_IS_OK(status)) {
2830 DEBUG(10, ("open_directory: smbd_check_access_rights on "
2831 "file %s failed with %s\n",
2832 smb_fname_str_dbg(smb_dname),
2833 nt_errstr(status)));
2834 return status;
2835 }
2836 }
2837
2838 status = file_new(req, conn, &fsp);
2839 if(!NT_STATUS_IS_OK(status)) {
2840 return status;
2841 }
2842
2843 /*
2844 * Setup the files_struct for it.
2845 */
2846
2847 fsp->mode = smb_dname->st.st_ex_mode;
2848 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2849 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2850 fsp->file_pid = req ? req->smbpid : 0;
2851 fsp->can_lock = False;
2852 fsp->can_read = False;
2853 fsp->can_write = False;
2854
2855 fsp->share_access = share_access;
2856 fsp->fh->private_options = 0;
2857 /*
2858 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2859 */
2860 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2861 fsp->print_file = NULL;
2862 fsp->modified = False;
2863 fsp->oplock_type = NO_OPLOCK;
2864 fsp->sent_oplock_break = NO_BREAK_SENT;
2865 fsp->is_directory = True;
2866 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2867 status = fsp_set_smb_fname(fsp, smb_dname);
2868 if (!NT_STATUS_IS_OK(status)) {
2869 file_free(req, fsp);
2870 return status;
2871 }
2872
2873 mtimespec = smb_dname->st.st_ex_mtime;
2874
2875 #ifdef O_DIRECTORY
2876 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2877 #else
2878 /* POSIX allows us to open a directory with O_RDONLY. */
2879 status = fd_open(conn, fsp, O_RDONLY, 0);
2880 #endif
2881 if (!NT_STATUS_IS_OK(status)) {
2882 DEBUG(5, ("open_directory: Could not open fd for "
2883 "%s (%s)\n",
2884 smb_fname_str_dbg(smb_dname),
2885 nt_errstr(status)));
2886 file_free(req, fsp);
2887 return status;
2888 }
2889
2890 status = vfs_stat_fsp(fsp);
2891 if (!NT_STATUS_IS_OK(status)) {
2892 fd_close(fsp);
2893 file_free(req, fsp);
2894 return status;
2895 }
2896
2897 /* Ensure there was no race condition. */
2898 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2899 DEBUG(5,("open_directory: stat struct differs for "
2900 "directory %s.\n",
2901 smb_fname_str_dbg(smb_dname)));
2902 fd_close(fsp);
2903 file_free(req, fsp);
2904 return NT_STATUS_ACCESS_DENIED;
2905 }
2906
2907 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2908 conn->connectpath, smb_dname, &mtimespec);
2909
2910 if (lck == NULL) {
2911 DEBUG(0, ("open_directory: Could not get share mode lock for "
2912 "%s\n", smb_fname_str_dbg(smb_dname)));
2913 fd_close(fsp);
2914 file_free(req, fsp);
2915 return NT_STATUS_SHARING_VIOLATION;
2916 }
2917
2918 status = open_mode_check(conn, lck, fsp->name_hash,
2919 access_mask, share_access,
2920 create_options, &dir_existed);
2921
2922 if (!NT_STATUS_IS_OK(status)) {
2923 TALLOC_FREE(lck);
2924 fd_close(fsp);
2925 file_free(req, fsp);
2926 return status;
2927 }
2928
2929 set_share_mode(lck, fsp, get_current_uid(conn),
2930 req ? req->mid : 0, NO_OPLOCK);
2931
2932 /* For directories the delete on close bit at open time seems
2933 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2934 if (create_options & FILE_DELETE_ON_CLOSE) {
2935 status = can_set_delete_on_close(fsp, 0);
2936 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2937 TALLOC_FREE(lck);
2938 fd_close(fsp);
2939 file_free(req, fsp);
2940 return status;
2941 }
2942
2943 if (NT_STATUS_IS_OK(status)) {
2944 /* Note that here we set the *inital* delete on close flag,
2945 not the regular one. The magic gets handled in close. */
2946 fsp->initial_delete_on_close = True;
2947 }
2948 }
2949
2950 TALLOC_FREE(lck);
2951
2952 if (pinfo) {
2953 *pinfo = info;
2954 }
2955
2956 *result = fsp;
2957 return NT_STATUS_OK;
2958 }
2959
2960 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2961 struct smb_filename *smb_dname)
2962 {
2963 NTSTATUS status;
2964 files_struct *fsp;
2965
2966 status = SMB_VFS_CREATE_FILE(
2967 conn, /* conn */
2968 req, /* req */
2969 0, /* root_dir_fid */
2970 smb_dname, /* fname */
2971 FILE_READ_ATTRIBUTES, /* access_mask */
2972 FILE_SHARE_NONE, /* share_access */
2973 FILE_CREATE, /* create_disposition*/
2974 FILE_DIRECTORY_FILE, /* create_options */
2975 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2976 0, /* oplock_request */
2977 0, /* allocation_size */
2978 0, /* private_flags */
2979 NULL, /* sd */
2980 NULL, /* ea_list */
2981 &fsp, /* result */
2982 NULL); /* pinfo */
2983
2984 if (NT_STATUS_IS_OK(status)) {
2985 close_file(req, fsp, NORMAL_CLOSE);
2986 }
2987
2988 return status;
2989 }
2990
2991 /****************************************************************************
2992 Receive notification that one of our open files has been renamed by another
2993 smbd process.
2994 ****************************************************************************/
2995
2996 void msg_file_was_renamed(struct messaging_context *msg,
2997 void *private_data,
2998 uint32_t msg_type,
2999 struct server_id server_id,
3000 DATA_BLOB *data)
3001 {
3002 files_struct *fsp;
3003 char *frm = (char *)data->data;
3004 struct file_id id;
3005 const char *sharepath;
3006 const char *base_name;
3007 const char *stream_name;
3008 struct smb_filename *smb_fname = NULL;
3009 size_t sp_len, bn_len;
3010 NTSTATUS status;
3011 struct smbd_server_connection *sconn =
3012 talloc_get_type_abort(private_data,
3013 struct smbd_server_connection);
3014
3015 if (data->data == NULL
3016 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3017 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3018 (int)data->length));
3019 return;
3020 }
3021
3022 /* Unpack the message. */
3023 pull_file_id_24(frm, &id);
3024 sharepath = &frm[24];
3025 sp_len = strlen(sharepath);
3026 base_name = sharepath + sp_len + 1;
3027 bn_len = strlen(base_name);
3028 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3029
3030 /* stream_name must always be NULL if there is no stream. */
3031 if (stream_name[0] == '\0') {
3032 stream_name = NULL;
3033 }
3034
3035 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3036 stream_name, NULL, &smb_fname);
3037 if (!NT_STATUS_IS_OK(status)) {
3038 return;
3039 }
3040
3041 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3042 "file_id %s\n",
3043 sharepath, smb_fname_str_dbg(smb_fname),
3044 file_id_string_tos(&id)));
3045
3046 for(fsp = file_find_di_first(sconn, id); fsp;
3047 fsp = file_find_di_next(fsp)) {
3048 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3049
3050 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3051 fsp->fnum, fsp_str_dbg(fsp),
3052 smb_fname_str_dbg(smb_fname)));
3053 status = fsp_set_smb_fname(fsp, smb_fname);
3054 if (!NT_STATUS_IS_OK(status)) {
3055 goto out;
3056 }
3057 } else {
3058 /* TODO. JRA. */
3059 /* Now we have the complete path we can work out if this is
3060 actually within this share and adjust newname accordingly. */
3061 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3062 "not sharepath %s) "
3063 "fnum %d from %s -> %s\n",
3064 fsp->conn->connectpath,
3065 sharepath,
3066 fsp->fnum,
3067 fsp_str_dbg(fsp),
3068 smb_fname_str_dbg(smb_fname)));
3069 }
3070 }
3071 out:
3072 TALLOC_FREE(smb_fname);
3073 return;
3074 }
3075
3076 /*
3077 * If a main file is opened for delete, all streams need to be checked for
3078 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3079 * If that works, delete them all by setting the delete on close and close.
3080 */
3081
3082 NTSTATUS open_streams_for_delete(connection_struct *conn,
3083 const char *fname)
3084 {
3085 struct stream_struct *stream_info = NULL;
3086 files_struct **streams = NULL;
3087 int i;
3088 unsigned int num_streams = 0;
3089 TALLOC_CTX *frame = talloc_stackframe();
3090 NTSTATUS status;
3091
3092 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3093 &num_streams, &stream_info);
3094
3095 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3096 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3097 DEBUG(10, ("no streams around\n"));
3098 TALLOC_FREE(frame);
3099 return NT_STATUS_OK;
3100 }
3101
3102 if (!NT_STATUS_IS_OK(status)) {
3103 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3104 nt_errstr(status)));
3105 goto fail;
3106 }
3107
3108 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3109 num_streams));
3110
3111 if (num_streams == 0) {
3112 TALLOC_FREE(frame);
3113 return NT_STATUS_OK;
3114 }
3115
3116 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3117 if (streams == NULL) {
3118 DEBUG(0, ("talloc failed\n"));
3119 status = NT_STATUS_NO_MEMORY;
3120 goto fail;
3121 }
3122
3123 for (i=0; i<num_streams; i++) {
3124 struct smb_filename *smb_fname = NULL;
3125
3126 if (strequal(stream_info[i].name, "::$DATA")) {
3127 streams[i] = NULL;
3128 continue;
3129 }
3130
3131 status = create_synthetic_smb_fname(talloc_tos(), fname,
3132 stream_info[i].name,
3133 NULL, &smb_fname);
3134 if (!NT_STATUS_IS_OK(status)) {
3135 goto fail;
3136 }
3137
3138 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3139 DEBUG(10, ("Unable to stat stream: %s\n",
3140 smb_fname_str_dbg(smb_fname)));
3141 }
3142
3143 status = SMB_VFS_CREATE_FILE(
3144 conn, /* conn */
3145 NULL, /* req */
3146 0, /* root_dir_fid */
3147 smb_fname, /* fname */
3148 DELETE_ACCESS, /* access_mask */
3149 (FILE_SHARE_READ | /* share_access */
3150 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3151 FILE_OPEN, /* create_disposition*/
3152 0, /* create_options */
3153 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3154 0, /* oplock_request */
3155 0, /* allocation_size */
3156 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3157 NULL, /* sd */
3158 NULL, /* ea_list */
3159 &streams[i], /* result */
3160 NULL); /* pinfo */
3161
3162 if (!NT_STATUS_IS_OK(status)) {
3163 DEBUG(10, ("Could not open stream %s: %s\n",
3164 smb_fname_str_dbg(smb_fname),
3165 nt_errstr(status)));
3166
3167 TALLOC_FREE(smb_fname);
3168 break;
3169 }
3170 TALLOC_FREE(smb_fname);
3171 }
3172
3173 /*
3174 * don't touch the variable "status" beyond this point :-)
3175 */
3176
3177 for (i -= 1 ; i >= 0; i--) {
3178 if (streams[i] == NULL) {
3179 continue;
3180 }
3181
3182 DEBUG(10, ("Closing stream # %d, %s\n", i,
3183 fsp_str_dbg(streams[i])));
3184 close_file(NULL, streams[i], NORMAL_CLOSE);
3185 }
3186
3187 fail:
3188 TALLOC_FREE(frame);
3189 return status;
3190 }
3191
3192 /*********************************************************************
3193 Create a default ACL by inheriting from the parent. If no inheritance
3194 from the parent available, don't set anything. This will leave the actual
3195 permissions the new file or directory already got from the filesystem
3196 as the NT ACL when read.
3197 *********************************************************************/
3198
3199 static NTSTATUS inherit_new_acl(files_struct *fsp)
3200 {
3201 TALLOC_CTX *ctx = talloc_tos();
3202 char *parent_name = NULL;
3203 struct security_descriptor *parent_desc = NULL;
3204 NTSTATUS status = NT_STATUS_OK;
3205 struct security_descriptor *psd = NULL;
3206 struct dom_sid *owner_sid = NULL;
3207 struct dom_sid *group_sid = NULL;
3208 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3209 bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3210 bool inheritable_components = false;
3211 size_t size = 0;
3212
3213 if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3214 return NT_STATUS_NO_MEMORY;
3215 }
3216
3217 status = SMB_VFS_GET_NT_ACL(fsp->conn,
3218 parent_name,
3219 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3220 &parent_desc);
3221 if (!NT_STATUS_IS_OK(status)) {
3222 return status;
3223 }
3224
3225 inheritable_components = sd_has_inheritable_components(parent_desc,
3226 fsp->is_directory);
3227
3228 if (!inheritable_components && !inherit_owner) {
3229 /* Nothing to inherit and not setting owner. */
3230 return NT_STATUS_OK;
3231 }
3232
3233 /* Create an inherited descriptor from the parent. */
3234
3235 if (DEBUGLEVEL >= 10) {
3236 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3237 fsp_str_dbg(fsp) ));
3238 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3239 }
3240
3241 /* Inherit from parent descriptor if "inherit owner" set. */
3242 if (inherit_owner) {
3243 owner_sid = parent_desc->owner_sid;
3244 group_sid = parent_desc->group_sid;
3245 }
3246
3247 if (owner_sid == NULL) {
3248 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3249 }
3250 if (group_sid == NULL) {
3251 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3252 }
3253
3254 status = se_create_child_secdesc(ctx,
3255 &psd,
3256 &size,
3257 parent_desc,
3258 owner_sid,
3259 group_sid,
3260 fsp->is_directory);
3261 if (!NT_STATUS_IS_OK(status)) {
3262 return status;
3263 }
3264
3265 /* If inheritable_components == false,
3266 se_create_child_secdesc()
3267 creates a security desriptor with a NULL dacl
3268 entry, but with SEC_DESC_DACL_PRESENT. We need
3269 to remove that flag. */
3270
3271 if (!inheritable_components) {
3272 security_info_sent &= ~SECINFO_DACL;
3273 psd->type &= ~SEC_DESC_DACL_PRESENT;
3274 }
3275
3276 if (DEBUGLEVEL >= 10) {
3277 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3278 fsp_str_dbg(fsp) ));
3279 NDR_PRINT_DEBUG(security_descriptor, psd);
3280 }
3281
3282 if (inherit_owner) {
3283 /* We need to be root to force this. */
3284 become_root();
3285 }
3286 status = SMB_VFS_FSET_NT_ACL(fsp,
3287 security_info_sent,
3288 psd);
3289 if (inherit_owner) {
3290 unbecome_root();
3291 }
3292 return status;
3293 }
3294
3295 /*
3296 * Wrapper around open_file_ntcreate and open_directory
3297 */
3298
3299 static NTSTATUS create_file_unixpath(connection_struct *conn,
3300 struct smb_request *req,
3301 struct smb_filename *smb_fname,
3302 uint32_t access_mask,
3303 uint32_t share_access,
3304 uint32_t create_disposition,
3305 uint32_t create_options,
3306 uint32_t file_attributes,
3307 uint32_t oplock_request,
3308 uint64_t allocation_size,
3309 uint32_t private_flags,
3310 struct security_descriptor *sd,
3311 struct ea_list *ea_list,
3312
3313 files_struct **result,
3314 int *pinfo)
3315 {
3316 int info = FILE_WAS_OPENED;
3317 files_struct *base_fsp = NULL;
3318 files_struct *fsp = NULL;
3319 NTSTATUS status;
3320
3321 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3322 "file_attributes = 0x%x, share_access = 0x%x, "
3323 "create_disposition = 0x%x create_options = 0x%x "
3324 "oplock_request = 0x%x private_flags = 0x%x "
3325 "ea_list = 0x%p, sd = 0x%p, "
3326 "fname = %s\n",
3327 (unsigned int)access_mask,
3328 (unsigned int)file_attributes,
3329 (unsigned int)share_access,
3330 (unsigned int)create_disposition,
3331 (unsigned int)create_options,
3332 (unsigned int)oplock_request,
3333 (unsigned int)private_flags,
3334 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3335
3336 if (create_options & FILE_OPEN_BY_FILE_ID) {
3337 status = NT_STATUS_NOT_SUPPORTED;
3338 goto fail;
3339 }
3340
3341 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3342 status = NT_STATUS_INVALID_PARAMETER;
3343 goto fail;
3344 }
3345
3346 if (req == NULL) {
3347 oplock_request |= INTERNAL_OPEN_ONLY;
3348 }
3349
3350 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3351 && (access_mask & DELETE_ACCESS)
3352 && !is_ntfs_stream_smb_fname(smb_fname)) {
3353 /*
3354 * We can't open a file with DELETE access if any of the
3355 * streams is open without FILE_SHARE_DELETE
3356 */
3357 status = open_streams_for_delete(conn, smb_fname->base_name);
3358
3359 if (!NT_STATUS_IS_OK(status)) {
3360 goto fail;
3361 }
3362 }
3363
3364 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3365 !security_token_has_privilege(get_current_nttok(conn),
3366 SEC_PRIV_SECURITY)) {
3367 DEBUG(10, ("create_file_unixpath: open on %s "
3368 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3369 smb_fname_str_dbg(smb_fname)));
3370 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3371 goto fail;
3372 }
3373
3374 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3375 && is_ntfs_stream_smb_fname(smb_fname)
3376 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3377 uint32 base_create_disposition;
3378 struct smb_filename *smb_fname_base = NULL;
3379
3380 if (create_options & FILE_DIRECTORY_FILE) {
3381 status = NT_STATUS_NOT_A_DIRECTORY;
3382 goto fail;
3383 }
3384
3385 switch (create_disposition) {
3386 case FILE_OPEN:
3387 base_create_disposition = FILE_OPEN;
3388 break;
3389 default:
3390 base_create_disposition = FILE_OPEN_IF;
3391 break;
3392 }
3393
3394 /* Create an smb_filename with stream_name == NULL. */
3395 status = create_synthetic_smb_fname(talloc_tos(),
3396 smb_fname->base_name,
3397 NULL, NULL,
3398 &smb_fname_base);
3399 if (!NT_STATUS_IS_OK(status)) {
3400 goto fail;
3401 }
3402
3403 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3404 DEBUG(10, ("Unable to stat stream: %s\n",
3405 smb_fname_str_dbg(smb_fname_base)));
3406 }
3407
3408 /* Open the base file. */
3409 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3410 FILE_SHARE_READ
3411 | FILE_SHARE_WRITE
3412 | FILE_SHARE_DELETE,
3413 base_create_disposition,
3414 0, 0, 0, 0, 0, NULL, NULL,
3415 &base_fsp, NULL);
3416 TALLOC_FREE(smb_fname_base);
3417
3418 if (!NT_STATUS_IS_OK(status)) {
3419 DEBUG(10, ("create_file_unixpath for base %s failed: "
3420 "%s\n", smb_fname->base_name,
3421 nt_errstr(status)));
3422 goto fail;
3423 }
3424 /* we don't need to low level fd */
3425 fd_close(base_fsp);
3426 }
3427
3428 /*
3429 * If it's a request for a directory open, deal with it separately.
3430 */
3431
3432 if (create_options & FILE_DIRECTORY_FILE) {
3433
3434 if (create_options & FILE_NON_DIRECTORY_FILE) {
3435 status = NT_STATUS_INVALID_PARAMETER;
3436 goto fail;
3437 }
3438
3439 /* Can't open a temp directory. IFS kit test. */
3440 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3441 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3442 status = NT_STATUS_INVALID_PARAMETER;
3443 goto fail;
3444 }
3445
3446 /*
3447 * We will get a create directory here if the Win32
3448 * app specified a security descriptor in the
3449 * CreateDirectory() call.
3450 */
3451
3452 oplock_request = 0;
3453 status = open_directory(
3454 conn, req, smb_fname, access_mask, share_access,
3455 create_disposition, create_options, file_attributes,
3456 &info, &fsp);
3457 } else {
3458
3459 /*
3460 * Ordinary file case.
3461 */
3462
3463 status = file_new(req, conn, &fsp);
3464 if(!NT_STATUS_IS_OK(status)) {
3465 goto fail;
3466 }
3467
3468 status = fsp_set_smb_fname(fsp, smb_fname);
3469 if (!NT_STATUS_IS_OK(status)) {
3470 goto fail;
3471 }
3472
3473 /*
3474 * We're opening the stream element of a base_fsp
3475 * we already opened. Set up the base_fsp pointer.
3476 */
3477 if (base_fsp) {
3478 fsp->base_fsp = base_fsp;
3479 }
3480
3481 status = open_file_ntcreate(conn,
3482 req,
3483 access_mask,
3484 share_access,
3485 create_disposition,
3486 create_options,
3487 file_attributes,
3488 oplock_request,
3489 private_flags,
3490 &info,
3491 fsp);
3492
3493 if(!NT_STATUS_IS_OK(status)) {
3494 file_free(req, fsp);
3495 fsp = NULL;
3496 }
3497
3498 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3499
3500 /* A stream open never opens a directory */
3501
3502 if (base_fsp) {
3503 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3504 goto fail;
3505 }
3506
3507 /*
3508 * Fail the open if it was explicitly a non-directory
3509 * file.
3510 */
3511
3512 if (create_options & FILE_NON_DIRECTORY_FILE) {
3513 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3514 goto fail;
3515 }
3516
3517 oplock_request = 0;
3518 status = open_directory(
3519 conn, req, smb_fname, access_mask,
3520 share_access, create_disposition,
3521 create_options, file_attributes,
3522 &info, &fsp);
3523 }
3524 }
3525
3526 if (!NT_STATUS_IS_OK(status)) {
3527 goto fail;
3528 }
3529
3530 fsp->base_fsp = base_fsp;
3531
3532 if ((ea_list != NULL) &&
3533 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3534 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3535 if (!NT_STATUS_IS_OK(status)) {
3536 goto fail;
3537 }
3538 }
3539
3540 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3541 status = NT_STATUS_ACCESS_DENIED;
3542 goto fail;
3543 }
3544
3545 /* Save the requested allocation size. */
3546 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3547 if (allocation_size
3548 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3549 fsp->initial_allocation_size = smb_roundup(
3550 fsp->conn, allocation_size);
3551 if (fsp->is_directory) {
3552 /* Can't set allocation size on a directory. */
3553 status = NT_STATUS_ACCESS_DENIED;
3554 goto fail;
3555 }
3556 if (vfs_allocate_file_space(
3557 fsp, fsp->initial_allocation_size) == -1) {
3558 status = NT_STATUS_DISK_FULL;
3559 goto fail;
3560 }
3561 } else {
3562 fsp->initial_allocation_size = smb_roundup(
3563 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3564 }
3565 }
3566
3567 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3568 fsp->base_fsp == NULL) {
3569 if (sd != NULL) {
3570 /*
3571 * According to the MS documentation, the only time the security
3572 * descriptor is applied to the opened file is iff we *created* the
3573 * file; an existing file stays the same.
3574 *
3575 * Also, it seems (from observation) that you can open the file with
3576 * any access mask but you can still write the sd. We need to override
3577 * the granted access before we call set_sd
3578 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3579 */
3580
3581 uint32_t sec_info_sent;
3582 uint32_t saved_access_mask = fsp->access_mask;
3583
3584 sec_info_sent = get_sec_info(sd);
3585
3586 fsp->access_mask = FILE_GENERIC_ALL;
3587
3588 /* Convert all the generic bits. */
3589 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3590 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3591
3592 if (sec_info_sent & (SECINFO_OWNER|
3593 SECINFO_GROUP|
3594 SECINFO_DACL|
3595 SECINFO_SACL)) {
3596 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3597 }
3598
3599 fsp->access_mask = saved_access_mask;
3600
3601 if (!NT_STATUS_IS_OK(status)) {
3602 goto fail;
3603 }
3604 } else if (lp_inherit_acls(SNUM(conn))) {
3605 /* Inherit from parent. Errors here are not fatal. */
3606 status = inherit_new_acl(fsp);
3607 if (!NT_STATUS_IS_OK(status)) {
3608 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3609 fsp_str_dbg(fsp),
3610 nt_errstr(status) ));
3611 }
3612 }
3613 }
3614
3615 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3616
3617 *result = fsp;
3618 if (pinfo != NULL) {
3619 *pinfo = info;
3620 }
3621
3622 smb_fname->st = fsp->fsp_name->st;
3623
3624 return NT_STATUS_OK;
3625
3626 fail:
3627 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3628
3629 if (fsp != NULL) {
3630 if (base_fsp && fsp->base_fsp == base_fsp) {
3631 /*
3632 * The close_file below will close
3633 * fsp->base_fsp.
3634 */
3635 base_fsp = NULL;
3636 }
3637 close_file(req, fsp, ERROR_CLOSE);
3638 fsp = NULL;
3639 }
3640 if (base_fsp != NULL) {
3641 close_file(req, base_fsp, ERROR_CLOSE);
3642 base_fsp = NULL;
3643 }
3644 return status;
3645 }
3646
3647 /*
3648 * Calculate the full path name given a relative fid.
3649 */
3650 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3651 struct smb_request *req,
3652 uint16_t root_dir_fid,
3653 const struct smb_filename *smb_fname,
3654 struct smb_filename **smb_fname_out)
3655 {
3656 files_struct *dir_fsp;
3657 char *parent_fname = NULL;
3658 char *new_base_name = NULL;
3659 NTSTATUS status;
3660
3661 if (root_dir_fid == 0 || !smb_fname) {
3662 status = NT_STATUS_INTERNAL_ERROR;
3663 goto out;
3664 }
3665
3666 dir_fsp = file_fsp(req, root_dir_fid);
3667
3668 if (dir_fsp == NULL) {
3669 status = NT_STATUS_INVALID_HANDLE;
3670 goto out;
3671 }
3672
3673 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3674 status = NT_STATUS_INVALID_HANDLE;
3675 goto out;
3676 }
3677
3678 if (!dir_fsp->is_directory) {
3679
3680 /*
3681 * Check to see if this is a mac fork of some kind.
3682 */
3683
3684 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3685 is_ntfs_stream_smb_fname(smb_fname)) {
3686 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3687 goto out;
3688 }
3689
3690 /*
3691 we need to handle the case when we get a
3692 relative open relative to a file and the
3693 pathname is blank - this is a reopen!
3694 (hint from demyn plantenberg)
3695 */
3696
3697 status = NT_STATUS_INVALID_HANDLE;
3698 goto out;
3699 }
3700
3701 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3702 /*
3703 * We're at the toplevel dir, the final file name
3704 * must not contain ./, as this is filtered out
3705 * normally by srvstr_get_path and unix_convert
3706 * explicitly rejects paths containing ./.
3707 */
3708 parent_fname = talloc_strdup(talloc_tos(), "");
3709 if (parent_fname == NULL) {
3710 status = NT_STATUS_NO_MEMORY;
3711 goto out;
3712 }
3713 } else {
3714 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3715
3716 /*
3717 * Copy in the base directory name.
3718 */
3719
3720 parent_fname = talloc_array(talloc_tos(), char,
3721 dir_name_len+2);
3722 if (parent_fname == NULL) {
3723 status = NT_STATUS_NO_MEMORY;
3724 goto out;
3725 }
3726 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3727 dir_name_len+1);
3728
3729 /*
3730 * Ensure it ends in a '/'.
3731 * We used TALLOC_SIZE +2 to add space for the '/'.
3732 */
3733
3734 if(dir_name_len
3735 && (parent_fname[dir_name_len-1] != '\\')
3736 && (parent_fname[dir_name_len-1] != '/')) {
3737 parent_fname[dir_name_len] = '/';
3738 parent_fname[dir_name_len+1] = '\0';
3739 }
3740 }
3741
3742 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3743 smb_fname->base_name);
3744 if (new_base_name == NULL) {
3745 status = NT_STATUS_NO_MEMORY;
3746 goto out;
3747 }
3748
3749 status = filename_convert(req,
3750 conn,
3751 req->flags2 & FLAGS2_DFS_PATHNAMES,
3752 new_base_name,
3753 0,
3754 NULL,
3755 smb_fname_out);
3756 if (!NT_STATUS_IS_OK(status)) {
3757 goto out;
3758 }
3759
3760 out:
3761 TALLOC_FREE(parent_fname);
3762 TALLOC_FREE(new_base_name);
3763 return status;
3764 }
3765
3766 NTSTATUS create_file_default(connection_struct *conn,
3767 struct smb_request *req,
3768 uint16_t root_dir_fid,
3769 struct smb_filename *smb_fname,
3770 uint32_t access_mask,
3771 uint32_t share_access,
3772 uint32_t create_disposition,
3773 uint32_t create_options,
3774 uint32_t file_attributes,
3775 uint32_t oplock_request,
3776 uint64_t allocation_size,
3777 uint32_t private_flags,
3778 struct security_descriptor *sd,
3779 struct ea_list *ea_list,
3780 files_struct **result,
3781 int *pinfo)
3782 {
3783 int info = FILE_WAS_OPENED;
3784 files_struct *fsp = NULL;
3785 NTSTATUS status;
3786 bool stream_name = false;
3787
3788 DEBUG(10,("create_file: access_mask = 0x%x "
3789 "file_attributes = 0x%x, share_access = 0x%x, "
3790 "create_disposition = 0x%x create_options = 0x%x "
3791 "oplock_request = 0x%x "
3792 "private_flags = 0x%x "
3793 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3794 "fname = %s\n",
3795 (unsigned int)access_mask,
3796 (unsigned int)file_attributes,
3797 (unsigned int)share_access,
3798 (unsigned int)create_disposition,
3799 (unsigned int)create_options,
3800 (unsigned int)oplock_request,
3801 (unsigned int)private_flags,
3802 (unsigned int)root_dir_fid,
3803 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3804
3805 /*
3806 * Calculate the filename from the root_dir_if if necessary.
3807 */
3808
3809 if (root_dir_fid != 0) {
3810 struct smb_filename *smb_fname_out = NULL;
3811 status = get_relative_fid_filename(conn, req, root_dir_fid,
3812 smb_fname, &smb_fname_out);
3813 if (!NT_STATUS_IS_OK(status)) {
3814 goto fail;
3815 }
3816 smb_fname = smb_fname_out;
3817 }
3818
3819 /*
3820 * Check to see if this is a mac fork of some kind.
3821 */
3822
3823 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3824 if (stream_name) {
3825 enum FAKE_FILE_TYPE fake_file_type;
3826
3827 fake_file_type = is_fake_file(smb_fname);
3828
3829 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3830
3831 /*
3832 * Here we go! support for changing the disk quotas
3833 * --metze
3834 *
3835 * We need to fake up to open this MAGIC QUOTA file
3836 * and return a valid FID.
3837 *
3838 * w2k close this file directly after openening xp
3839 * also tries a QUERY_FILE_INFO on the file and then
3840 * close it
3841 */
3842 status = open_fake_file(req, conn, req->vuid,
3843 fake_file_type, smb_fname,
3844 access_mask, &fsp);
3845 if (!NT_STATUS_IS_OK(status)) {
3846 goto fail;
3847 }
3848
3849 ZERO_STRUCT(smb_fname->st);
3850 goto done;
3851 }
3852
3853 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3854 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3855 goto fail;
3856 }
3857 }
3858
3859 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3860 int ret;
3861 smb_fname->stream_name = NULL;
3862 /* We have to handle this error here. */
3863 if (create_options & FILE_DIRECTORY_FILE) {
3864 status = NT_STATUS_NOT_A_DIRECTORY;
3865 goto fail;
3866 }
3867 if (lp_posix_pathnames()) {
3868 ret = SMB_VFS_LSTAT(conn, smb_fname);
3869 } else {
3870 ret = SMB_VFS_STAT(conn, smb_fname);
3871 }
3872
3873 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3874 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3875 goto fail;
3876 }
3877 }
3878
3879 status = create_file_unixpath(
3880 conn, req, smb_fname, access_mask, share_access,
3881 create_disposition, create_options, file_attributes,
3882 oplock_request, allocation_size, private_flags,
3883 sd, ea_list,
3884 &fsp, &info);
3885
3886 if (!NT_STATUS_IS_OK(status)) {
3887 goto fail;
3888 }
3889
3890 done:
3891 DEBUG(10, ("create_file: info=%d\n", info));
3892
3893 *result = fsp;
3894 if (pinfo != NULL) {
3895 *pinfo = info;
3896 }
3897 return NT_STATUS_OK;
3898
3899 fail:
3900 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3901
3902 if (fsp != NULL) {
3903 close_file(req, fsp, ERROR_CLOSE);
3904 fsp = NULL;
3905 }
3906 return status;
3907 }
reg import