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Add new bool field async_open to struct deferred_open_record. Not used yet.
[Samba.git] / source3 / smbd / open.c
blob468b9cc3157ff0897fad357680bc40baa4de9d10
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 bool async_open;
39 struct file_id id;
40 };
41
42 /****************************************************************************
43 If the requester wanted DELETE_ACCESS and was rejected because
44 the file ACL didn't include DELETE_ACCESS, see if the parent ACL
45 overrides this.
46 ****************************************************************************/
47
48 static bool parent_override_delete(connection_struct *conn,
49 const struct smb_filename *smb_fname,
50 uint32_t access_mask,
51 uint32_t rejected_mask)
52 {
53 if ((access_mask & DELETE_ACCESS) &&
54 (rejected_mask & DELETE_ACCESS) &&
55 can_delete_file_in_directory(conn, smb_fname)) {
56 return true;
57 }
58 return false;
59 }
60
61 /****************************************************************************
62 Check if we have open rights.
63 ****************************************************************************/
64
65 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
66 const struct smb_filename *smb_fname,
67 uint32_t access_mask)
68 {
69 /* Check if we have rights to open. */
70 NTSTATUS status;
71 struct security_descriptor *sd = NULL;
72 uint32_t rejected_share_access;
73 uint32_t rejected_mask = access_mask;
74
75 rejected_share_access = access_mask & ~(conn->share_access);
76
77 if (rejected_share_access) {
78 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
79 "on %s (0x%x)\n",
80 (unsigned int)access_mask,
81 smb_fname_str_dbg(smb_fname),
82 (unsigned int)rejected_share_access ));
83 return NT_STATUS_ACCESS_DENIED;
84 }
85
86 if (get_current_uid(conn) == (uid_t)0) {
87 /* I'm sorry sir, I didn't know you were root... */
88 DEBUG(10,("smbd_check_access_rights: root override "
89 "on %s. Granting 0x%x\n",
90 smb_fname_str_dbg(smb_fname),
91 (unsigned int)access_mask ));
92 return NT_STATUS_OK;
93 }
94
95 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
96 DEBUG(10,("smbd_check_access_rights: not checking ACL "
97 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
98 smb_fname_str_dbg(smb_fname),
99 (unsigned int)access_mask ));
100 return NT_STATUS_OK;
101 }
102
103 if (access_mask == DELETE_ACCESS &&
104 VALID_STAT(smb_fname->st) &&
105 S_ISLNK(smb_fname->st.st_ex_mode)) {
106 /* We can always delete a symlink. */
107 DEBUG(10,("smbd_check_access_rights: not checking ACL "
108 "on DELETE_ACCESS on symlink %s.\n",
109 smb_fname_str_dbg(smb_fname) ));
110 return NT_STATUS_OK;
111 }
112
113 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
114 (SECINFO_OWNER |
115 SECINFO_GROUP |
116 SECINFO_DACL),&sd);
117
118 if (!NT_STATUS_IS_OK(status)) {
119 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
120 "on %s: %s\n",
121 smb_fname_str_dbg(smb_fname),
122 nt_errstr(status)));
123
124 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
125 goto access_denied;
126 }
127
128 return status;
129 }
130
131 /*
132 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
133 * owner WRITE_DAC and READ_CONTROL.
134 */
135 status = se_access_check(sd,
136 get_current_nttok(conn),
137 (access_mask & ~FILE_READ_ATTRIBUTES),
138 &rejected_mask);
139
140 DEBUG(10,("smbd_check_access_rights: file %s requesting "
141 "0x%x returning 0x%x (%s)\n",
142 smb_fname_str_dbg(smb_fname),
143 (unsigned int)access_mask,
144 (unsigned int)rejected_mask,
145 nt_errstr(status) ));
146
147 if (!NT_STATUS_IS_OK(status)) {
148 if (DEBUGLEVEL >= 10) {
149 DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
150 smb_fname_str_dbg(smb_fname) ));
151 NDR_PRINT_DEBUG(security_descriptor, sd);
152 }
153 }
154
155 TALLOC_FREE(sd);
156
157 if (NT_STATUS_IS_OK(status) ||
158 !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
159 return status;
160 }
161
162 /* Here we know status == NT_STATUS_ACCESS_DENIED. */
163
164 access_denied:
165
166 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
167 (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
168 !lp_store_dos_attributes(SNUM(conn)) &&
169 (lp_map_readonly(SNUM(conn)) ||
170 lp_map_archive(SNUM(conn)) ||
171 lp_map_hidden(SNUM(conn)) ||
172 lp_map_system(SNUM(conn)))) {
173 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
174
175 DEBUG(10,("smbd_check_access_rights: "
176 "overrode "
177 "FILE_WRITE_ATTRIBUTES "
178 "on file %s\n",
179 smb_fname_str_dbg(smb_fname)));
180 }
181
182 if (parent_override_delete(conn,
183 smb_fname,
184 access_mask,
185 rejected_mask)) {
186 /* Were we trying to do an open
187 * for delete and didn't get DELETE
188 * access (only) ? Check if the
189 * directory allows DELETE_CHILD.
190 * See here:
191 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
192 * for details. */
193
194 rejected_mask &= ~DELETE_ACCESS;
195
196 DEBUG(10,("smbd_check_access_rights: "
197 "overrode "
198 "DELETE_ACCESS on "
199 "file %s\n",
200 smb_fname_str_dbg(smb_fname)));
201 }
202
203 if (rejected_mask != 0) {
204 return NT_STATUS_ACCESS_DENIED;
205 }
206 return NT_STATUS_OK;
207 }
208
209 static NTSTATUS check_parent_access(struct connection_struct *conn,
210 struct smb_filename *smb_fname,
211 uint32_t access_mask)
212 {
213 NTSTATUS status;
214 char *parent_dir = NULL;
215 struct security_descriptor *parent_sd = NULL;
216 uint32_t access_granted = 0;
217
218 if (!parent_dirname(talloc_tos(),
219 smb_fname->base_name,
220 &parent_dir,
221 NULL)) {
222 return NT_STATUS_NO_MEMORY;
223 }
224
225 if (get_current_uid(conn) == (uid_t)0) {
226 /* I'm sorry sir, I didn't know you were root... */
227 DEBUG(10,("check_parent_access: root override "
228 "on %s. Granting 0x%x\n",
229 smb_fname_str_dbg(smb_fname),
230 (unsigned int)access_mask ));
231 return NT_STATUS_OK;
232 }
233
234 status = SMB_VFS_GET_NT_ACL(conn,
235 parent_dir,
236 SECINFO_DACL,
237 &parent_sd);
238
239 if (!NT_STATUS_IS_OK(status)) {
240 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
241 "%s with error %s\n",
242 parent_dir,
243 nt_errstr(status)));
244 return status;
245 }
246
247 /*
248 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
249 * owner WRITE_DAC and READ_CONTROL.
250 */
251 status = se_access_check(parent_sd,
252 get_current_nttok(conn),
253 (access_mask & ~FILE_READ_ATTRIBUTES),
254 &access_granted);
255 if(!NT_STATUS_IS_OK(status)) {
256 DEBUG(5,("check_parent_access: access check "
257 "on directory %s for "
258 "path %s for mask 0x%x returned (0x%x) %s\n",
259 parent_dir,
260 smb_fname->base_name,
261 access_mask,
262 access_granted,
263 nt_errstr(status) ));
264 return status;
265 }
266
267 return NT_STATUS_OK;
268 }
269
270 /****************************************************************************
271 fd support routines - attempt to do a dos_open.
272 ****************************************************************************/
273
274 static NTSTATUS fd_open(struct connection_struct *conn,
275 files_struct *fsp,
276 int flags,
277 mode_t mode)
278 {
279 struct smb_filename *smb_fname = fsp->fsp_name;
280 NTSTATUS status = NT_STATUS_OK;
281
282 #ifdef O_NOFOLLOW
283 /*
284 * Never follow symlinks on a POSIX client. The
285 * client should be doing this.
286 */
287
288 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
289 flags |= O_NOFOLLOW;
290 }
291 #endif
292
293 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
294 if (fsp->fh->fd == -1) {
295 int posix_errno = errno;
296 #ifdef O_NOFOLLOW
297 #if defined(ENOTSUP) && defined(OSF1)
298 /* handle special Tru64 errno */
299 if (errno == ENOTSUP) {
300 posix_errno = ELOOP;
301 }
302 #endif /* ENOTSUP */
303 #ifdef EFTYPE
304 /* fix broken NetBSD errno */
305 if (errno == EFTYPE) {
306 posix_errno = ELOOP;
307 }
308 #endif /* EFTYPE */
309 /* fix broken FreeBSD errno */
310 if (errno == EMLINK) {
311 posix_errno = ELOOP;
312 }
313 #endif /* O_NOFOLLOW */
314 status = map_nt_error_from_unix(posix_errno);
315 if (errno == EMFILE) {
316 static time_t last_warned = 0L;
317
318 if (time((time_t *) NULL) > last_warned) {
319 DEBUG(0,("Too many open files, unable "
320 "to open more! smbd's max "
321 "open files = %d\n",
322 lp_max_open_files()));
323 last_warned = time((time_t *) NULL);
324 }
325 }
326
327 }
328
329 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
330 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
331 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
332
333 return status;
334 }
335
336 /****************************************************************************
337 Close the file associated with a fsp.
338 ****************************************************************************/
339
340 NTSTATUS fd_close(files_struct *fsp)
341 {
342 int ret;
343
344 if (fsp->dptr) {
345 dptr_CloseDir(fsp);
346 }
347 if (fsp->fh->fd == -1) {
348 return NT_STATUS_OK; /* What we used to call a stat open. */
349 }
350 if (fsp->fh->ref_count > 1) {
351 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
352 }
353
354 ret = SMB_VFS_CLOSE(fsp);
355 fsp->fh->fd = -1;
356 if (ret == -1) {
357 return map_nt_error_from_unix(errno);
358 }
359 return NT_STATUS_OK;
360 }
361
362 /****************************************************************************
363 Change the ownership of a file to that of the parent directory.
364 Do this by fd if possible.
365 ****************************************************************************/
366
367 void change_file_owner_to_parent(connection_struct *conn,
368 const char *inherit_from_dir,
369 files_struct *fsp)
370 {
371 struct smb_filename *smb_fname_parent = NULL;
372 NTSTATUS status;
373 int ret;
374
375 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
376 NULL, NULL, &smb_fname_parent);
377 if (!NT_STATUS_IS_OK(status)) {
378 return;
379 }
380
381 ret = SMB_VFS_STAT(conn, smb_fname_parent);
382 if (ret == -1) {
383 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
384 "directory %s. Error was %s\n",
385 smb_fname_str_dbg(smb_fname_parent),
386 strerror(errno)));
387 TALLOC_FREE(smb_fname_parent);
388 return;
389 }
390
391 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
392 /* Already this uid - no need to change. */
393 DEBUG(10,("change_file_owner_to_parent: file %s "
394 "is already owned by uid %d\n",
395 fsp_str_dbg(fsp),
396 (int)fsp->fsp_name->st.st_ex_uid ));
397 TALLOC_FREE(smb_fname_parent);
398 return;
399 }
400
401 become_root();
402 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
403 unbecome_root();
404 if (ret == -1) {
405 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
406 "file %s to parent directory uid %u. Error "
407 "was %s\n", fsp_str_dbg(fsp),
408 (unsigned int)smb_fname_parent->st.st_ex_uid,
409 strerror(errno) ));
410 } else {
411 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
412 "parent directory uid %u.\n", fsp_str_dbg(fsp),
413 (unsigned int)smb_fname_parent->st.st_ex_uid));
414 /* Ensure the uid entry is updated. */
415 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
416 }
417
418 TALLOC_FREE(smb_fname_parent);
419 }
420
421 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
422 const char *inherit_from_dir,
423 const char *fname,
424 SMB_STRUCT_STAT *psbuf)
425 {
426 struct smb_filename *smb_fname_parent = NULL;
427 struct smb_filename *smb_fname_cwd = NULL;
428 char *saved_dir = NULL;
429 TALLOC_CTX *ctx = talloc_tos();
430 NTSTATUS status = NT_STATUS_OK;
431 int ret;
432
433 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
434 &smb_fname_parent);
435 if (!NT_STATUS_IS_OK(status)) {
436 return status;
437 }
438
439 ret = SMB_VFS_STAT(conn, smb_fname_parent);
440 if (ret == -1) {
441 status = map_nt_error_from_unix(errno);
442 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
443 "directory %s. Error was %s\n",
444 smb_fname_str_dbg(smb_fname_parent),
445 strerror(errno)));
446 goto out;
447 }
448
449 /* We've already done an lstat into psbuf, and we know it's a
450 directory. If we can cd into the directory and the dev/ino
451 are the same then we can safely chown without races as
452 we're locking the directory in place by being in it. This
453 should work on any UNIX (thanks tridge :-). JRA.
454 */
455
456 saved_dir = vfs_GetWd(ctx,conn);
457 if (!saved_dir) {
458 status = map_nt_error_from_unix(errno);
459 DEBUG(0,("change_dir_owner_to_parent: failed to get "
460 "current working directory. Error was %s\n",
461 strerror(errno)));
462 goto out;
463 }
464
465 /* Chdir into the new path. */
466 if (vfs_ChDir(conn, fname) == -1) {
467 status = map_nt_error_from_unix(errno);
468 DEBUG(0,("change_dir_owner_to_parent: failed to change "
469 "current working directory to %s. Error "
470 "was %s\n", fname, strerror(errno) ));
471 goto chdir;
472 }
473
474 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
475 &smb_fname_cwd);
476 if (!NT_STATUS_IS_OK(status)) {
477 return status;
478 }
479
480 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
481 if (ret == -1) {
482 status = map_nt_error_from_unix(errno);
483 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
484 "directory '.' (%s) Error was %s\n",
485 fname, strerror(errno)));
486 goto chdir;
487 }
488
489 /* Ensure we're pointing at the same place. */
490 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
491 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
492 DEBUG(0,("change_dir_owner_to_parent: "
493 "device/inode on directory %s changed. "
494 "Refusing to chown !\n", fname ));
495 status = NT_STATUS_ACCESS_DENIED;
496 goto chdir;
497 }
498
499 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
500 /* Already this uid - no need to change. */
501 DEBUG(10,("change_dir_owner_to_parent: directory %s "
502 "is already owned by uid %d\n",
503 fname,
504 (int)smb_fname_cwd->st.st_ex_uid ));
505 status = NT_STATUS_OK;
506 goto chdir;
507 }
508
509 become_root();
510 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
511 (gid_t)-1);
512 unbecome_root();
513 if (ret == -1) {
514 status = map_nt_error_from_unix(errno);
515 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
516 "directory %s to parent directory uid %u. "
517 "Error was %s\n", fname,
518 (unsigned int)smb_fname_parent->st.st_ex_uid,
519 strerror(errno) ));
520 } else {
521 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
522 "directory %s to parent directory uid %u.\n",
523 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
524 /* Ensure the uid entry is updated. */
525 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
526 }
527
528 chdir:
529 vfs_ChDir(conn,saved_dir);
530 out:
531 TALLOC_FREE(smb_fname_parent);
532 TALLOC_FREE(smb_fname_cwd);
533 return status;
534 }
535
536 /****************************************************************************
537 Open a file.
538 ****************************************************************************/
539
540 static NTSTATUS open_file(files_struct *fsp,
541 connection_struct *conn,
542 struct smb_request *req,
543 const char *parent_dir,
544 int flags,
545 mode_t unx_mode,
546 uint32 access_mask, /* client requested access mask. */
547 uint32 open_access_mask) /* what we're actually using in the open. */
548 {
549 struct smb_filename *smb_fname = fsp->fsp_name;
550 NTSTATUS status = NT_STATUS_OK;
551 int accmode = (flags & O_ACCMODE);
552 int local_flags = flags;
553 bool file_existed = VALID_STAT(fsp->fsp_name->st);
554 bool file_created = false;
555
556 fsp->fh->fd = -1;
557 errno = EPERM;
558
559 /* Check permissions */
560
561 /*
562 * This code was changed after seeing a client open request
563 * containing the open mode of (DENY_WRITE/read-only) with
564 * the 'create if not exist' bit set. The previous code
565 * would fail to open the file read only on a read-only share
566 * as it was checking the flags parameter directly against O_RDONLY,
567 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
568 * JRA.
569 */
570
571 if (!CAN_WRITE(conn)) {
572 /* It's a read-only share - fail if we wanted to write. */
573 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
574 DEBUG(3,("Permission denied opening %s\n",
575 smb_fname_str_dbg(smb_fname)));
576 return NT_STATUS_ACCESS_DENIED;
577 } else if(flags & O_CREAT) {
578 /* We don't want to write - but we must make sure that
579 O_CREAT doesn't create the file if we have write
580 access into the directory.
581 */
582 flags &= ~(O_CREAT|O_EXCL);
583 local_flags &= ~(O_CREAT|O_EXCL);
584 }
585 }
586
587 /*
588 * This little piece of insanity is inspired by the
589 * fact that an NT client can open a file for O_RDONLY,
590 * but set the create disposition to FILE_EXISTS_TRUNCATE.
591 * If the client *can* write to the file, then it expects to
592 * truncate the file, even though it is opening for readonly.
593 * Quicken uses this stupid trick in backup file creation...
594 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
595 * for helping track this one down. It didn't bite us in 2.0.x
596 * as we always opened files read-write in that release. JRA.
597 */
598
599 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
600 DEBUG(10,("open_file: truncate requested on read-only open "
601 "for file %s\n", smb_fname_str_dbg(smb_fname)));
602 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
603 }
604
605 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
606 (!file_existed && (local_flags & O_CREAT)) ||
607 ((local_flags & O_TRUNC) == O_TRUNC) ) {
608 const char *wild;
609
610 /*
611 * We can't actually truncate here as the file may be locked.
612 * open_file_ntcreate will take care of the truncate later. JRA.
613 */
614
615 local_flags &= ~O_TRUNC;
616
617 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
618 /*
619 * We would block on opening a FIFO with no one else on the
620 * other end. Do what we used to do and add O_NONBLOCK to the
621 * open flags. JRA.
622 */
623
624 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
625 local_flags |= O_NONBLOCK;
626 }
627 #endif
628
629 /* Don't create files with Microsoft wildcard characters. */
630 if (fsp->base_fsp) {
631 /*
632 * wildcard characters are allowed in stream names
633 * only test the basefilename
634 */
635 wild = fsp->base_fsp->fsp_name->base_name;
636 } else {
637 wild = smb_fname->base_name;
638 }
639 if ((local_flags & O_CREAT) && !file_existed &&
640 ms_has_wild(wild)) {
641 return NT_STATUS_OBJECT_NAME_INVALID;
642 }
643
644 /* Can we access this file ? */
645 if (!fsp->base_fsp) {
646 /* Only do this check on non-stream open. */
647 if (file_existed) {
648 status = smbd_check_access_rights(conn,
649 smb_fname,
650 access_mask);
651 } else if (local_flags & O_CREAT){
652 status = check_parent_access(conn,
653 smb_fname,
654 SEC_DIR_ADD_FILE);
655 } else {
656 /* File didn't exist and no O_CREAT. */
657 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
658 }
659 if (!NT_STATUS_IS_OK(status)) {
660 DEBUG(10,("open_file: "
661 "%s on file "
662 "%s returned %s\n",
663 file_existed ?
664 "smbd_check_access_rights" :
665 "check_parent_access",
666 smb_fname_str_dbg(smb_fname),
667 nt_errstr(status) ));
668 return status;
669 }
670 }
671
672 /* Actually do the open */
673 status = fd_open(conn, fsp, local_flags, unx_mode);
674 if (!NT_STATUS_IS_OK(status)) {
675 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
676 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
677 nt_errstr(status),local_flags,flags));
678 return status;
679 }
680
681 if ((local_flags & O_CREAT) && !file_existed) {
682 file_created = true;
683 }
684
685 } else {
686 fsp->fh->fd = -1; /* What we used to call a stat open. */
687 if (!file_existed) {
688 /* File must exist for a stat open. */
689 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
690 }
691
692 status = smbd_check_access_rights(conn,
693 smb_fname,
694 access_mask);
695
696 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
697 fsp->posix_open &&
698 S_ISLNK(smb_fname->st.st_ex_mode)) {
699 /* This is a POSIX stat open for delete
700 * or rename on a symlink that points
701 * nowhere. Allow. */
702 DEBUG(10,("open_file: allowing POSIX "
703 "open on bad symlink %s\n",
704 smb_fname_str_dbg(smb_fname)));
705 status = NT_STATUS_OK;
706 }
707
708 if (!NT_STATUS_IS_OK(status)) {
709 DEBUG(10,("open_file: "
710 "smbd_check_access_rights on file "
711 "%s returned %s\n",
712 smb_fname_str_dbg(smb_fname),
713 nt_errstr(status) ));
714 return status;
715 }
716 }
717
718 if (!file_existed) {
719 int ret;
720
721 if (fsp->fh->fd == -1) {
722 ret = SMB_VFS_STAT(conn, smb_fname);
723 } else {
724 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
725 /* If we have an fd, this stat should succeed. */
726 if (ret == -1) {
727 DEBUG(0,("Error doing fstat on open file %s "
728 "(%s)\n",
729 smb_fname_str_dbg(smb_fname),
730 strerror(errno) ));
731 }
732 }
733
734 /* For a non-io open, this stat failing means file not found. JRA */
735 if (ret == -1) {
736 status = map_nt_error_from_unix(errno);
737 fd_close(fsp);
738 return status;
739 }
740
741 if (file_created) {
742 bool need_re_stat = false;
743 /* Do all inheritance work after we've
744 done a successful stat call and filled
745 in the stat struct in fsp->fsp_name. */
746
747 /* Inherit the ACL if required */
748 if (lp_inherit_perms(SNUM(conn))) {
749 inherit_access_posix_acl(conn, parent_dir,
750 smb_fname->base_name,
751 unx_mode);
752 need_re_stat = true;
753 }
754
755 /* Change the owner if required. */
756 if (lp_inherit_owner(SNUM(conn))) {
757 change_file_owner_to_parent(conn, parent_dir,
758 fsp);
759 need_re_stat = true;
760 }
761
762 if (need_re_stat) {
763 if (fsp->fh->fd == -1) {
764 ret = SMB_VFS_STAT(conn, smb_fname);
765 } else {
766 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
767 /* If we have an fd, this stat should succeed. */
768 if (ret == -1) {
769 DEBUG(0,("Error doing fstat on open file %s "
770 "(%s)\n",
771 smb_fname_str_dbg(smb_fname),
772 strerror(errno) ));
773 }
774 }
775 }
776
777 notify_fname(conn, NOTIFY_ACTION_ADDED,
778 FILE_NOTIFY_CHANGE_FILE_NAME,
779 smb_fname->base_name);
780 }
781 }
782
783 /*
784 * POSIX allows read-only opens of directories. We don't
785 * want to do this (we use a different code path for this)
786 * so catch a directory open and return an EISDIR. JRA.
787 */
788
789 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
790 fd_close(fsp);
791 errno = EISDIR;
792 return NT_STATUS_FILE_IS_A_DIRECTORY;
793 }
794
795 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
796 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
797 fsp->file_pid = req ? req->smbpid : 0;
798 fsp->can_lock = True;
799 fsp->can_read = ((access_mask & FILE_READ_DATA) != 0);
800 fsp->can_write =
801 CAN_WRITE(conn) &&
802 ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0);
803 fsp->print_file = NULL;
804 fsp->modified = False;
805 fsp->sent_oplock_break = NO_BREAK_SENT;
806 fsp->is_directory = False;
807 if (conn->aio_write_behind_list &&
808 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
809 conn->case_sensitive)) {
810 fsp->aio_write_behind = True;
811 }
812
813 fsp->wcp = NULL; /* Write cache pointer. */
814
815 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
816 conn->session_info->unix_info->unix_name,
817 smb_fname_str_dbg(smb_fname),
818 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
819 conn->num_files_open));
820
821 errno = 0;
822 return NT_STATUS_OK;
823 }
824
825 /****************************************************************************
826 Check if we can open a file with a share mode.
827 Returns True if conflict, False if not.
828 ****************************************************************************/
829
830 static bool share_conflict(struct share_mode_entry *entry,
831 uint32 access_mask,
832 uint32 share_access)
833 {
834 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
835 "entry->share_access = 0x%x, "
836 "entry->private_options = 0x%x\n",
837 (unsigned int)entry->access_mask,
838 (unsigned int)entry->share_access,
839 (unsigned int)entry->private_options));
840
841 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
842 (unsigned int)access_mask, (unsigned int)share_access));
843
844 if ((entry->access_mask & (FILE_WRITE_DATA|
845 FILE_APPEND_DATA|
846 FILE_READ_DATA|
847 FILE_EXECUTE|
848 DELETE_ACCESS)) == 0) {
849 DEBUG(10,("share_conflict: No conflict due to "
850 "entry->access_mask = 0x%x\n",
851 (unsigned int)entry->access_mask ));
852 return False;
853 }
854
855 if ((access_mask & (FILE_WRITE_DATA|
856 FILE_APPEND_DATA|
857 FILE_READ_DATA|
858 FILE_EXECUTE|
859 DELETE_ACCESS)) == 0) {
860 DEBUG(10,("share_conflict: No conflict due to "
861 "access_mask = 0x%x\n",
862 (unsigned int)access_mask ));
863 return False;
864 }
865
866 #if 1 /* JRA TEST - Superdebug. */
867 #define CHECK_MASK(num, am, right, sa, share) \
868 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
869 (unsigned int)(num), (unsigned int)(am), \
870 (unsigned int)(right), (unsigned int)(am)&(right) )); \
871 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
872 (unsigned int)(num), (unsigned int)(sa), \
873 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
874 if (((am) & (right)) && !((sa) & (share))) { \
875 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
876 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
877 (unsigned int)(share) )); \
878 return True; \
879 }
880 #else
881 #define CHECK_MASK(num, am, right, sa, share) \
882 if (((am) & (right)) && !((sa) & (share))) { \
883 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
884 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
885 (unsigned int)(share) )); \
886 return True; \
887 }
888 #endif
889
890 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
891 share_access, FILE_SHARE_WRITE);
892 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
893 entry->share_access, FILE_SHARE_WRITE);
894
895 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
896 share_access, FILE_SHARE_READ);
897 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
898 entry->share_access, FILE_SHARE_READ);
899
900 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
901 share_access, FILE_SHARE_DELETE);
902 CHECK_MASK(6, access_mask, DELETE_ACCESS,
903 entry->share_access, FILE_SHARE_DELETE);
904
905 DEBUG(10,("share_conflict: No conflict.\n"));
906 return False;
907 }
908
909 #if defined(DEVELOPER)
910 static void validate_my_share_entries(struct smbd_server_connection *sconn,
911 int num,
912 struct share_mode_entry *share_entry)
913 {
914 struct server_id self = messaging_server_id(sconn->msg_ctx);
915 files_struct *fsp;
916
917 if (!serverid_equal(&self, &share_entry->pid)) {
918 return;
919 }
920
921 if (is_deferred_open_entry(share_entry) &&
922 !open_was_deferred(sconn, share_entry->op_mid)) {
923 char *str = talloc_asprintf(talloc_tos(),
924 "Got a deferred entry without a request: "
925 "PANIC: %s\n",
926 share_mode_str(talloc_tos(), num, share_entry));
927 smb_panic(str);
928 }
929
930 if (!is_valid_share_mode_entry(share_entry)) {
931 return;
932 }
933
934 fsp = file_find_dif(sconn, share_entry->id,
935 share_entry->share_file_id);
936 if (!fsp) {
937 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
938 share_mode_str(talloc_tos(), num, share_entry) ));
939 smb_panic("validate_my_share_entries: Cannot match a "
940 "share entry with an open file\n");
941 }
942
943 if (is_deferred_open_entry(share_entry)) {
944 goto panic;
945 }
946
947 if ((share_entry->op_type == NO_OPLOCK) &&
948 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
949 /* Someone has already written to it, but I haven't yet
950 * noticed */
951 return;
952 }
953
954 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
955 goto panic;
956 }
957
958 return;
959
960 panic:
961 {
962 char *str;
963 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
964 share_mode_str(talloc_tos(), num, share_entry) ));
965 str = talloc_asprintf(talloc_tos(),
966 "validate_my_share_entries: "
967 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
968 fsp->fsp_name->base_name,
969 (unsigned int)fsp->oplock_type,
970 (unsigned int)share_entry->op_type );
971 smb_panic(str);
972 }
973 }
974 #endif
975
976 bool is_stat_open(uint32 access_mask)
977 {
978 return (access_mask &&
979 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
980 FILE_WRITE_ATTRIBUTES))==0) &&
981 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
982 FILE_WRITE_ATTRIBUTES)) != 0));
983 }
984
985 /****************************************************************************
986 Deal with share modes
987 Invarient: Share mode must be locked on entry and exit.
988 Returns -1 on error, or number of share modes on success (may be zero).
989 ****************************************************************************/
990
991 static NTSTATUS open_mode_check(connection_struct *conn,
992 struct share_mode_lock *lck,
993 uint32_t name_hash,
994 uint32 access_mask,
995 uint32 share_access,
996 uint32 create_options,
997 bool *file_existed)
998 {
999 int i;
1000
1001 if(lck->data->num_share_modes == 0) {
1002 return NT_STATUS_OK;
1003 }
1004
1005 /* A delete on close prohibits everything */
1006
1007 if (is_delete_on_close_set(lck, name_hash)) {
1008 /*
1009 * Check the delete on close token
1010 * is valid. It could have been left
1011 * after a server crash.
1012 */
1013 for(i = 0; i < lck->data->num_share_modes; i++) {
1014 if (!share_mode_stale_pid(lck->data, i)) {
1015
1016 *file_existed = true;
1017
1018 return NT_STATUS_DELETE_PENDING;
1019 }
1020 }
1021 return NT_STATUS_OK;
1022 }
1023
1024 if (is_stat_open(access_mask)) {
1025 /* Stat open that doesn't trigger oplock breaks or share mode
1026 * checks... ! JRA. */
1027 return NT_STATUS_OK;
1028 }
1029
1030 /*
1031 * Check if the share modes will give us access.
1032 */
1033
1034 #if defined(DEVELOPER)
1035 for(i = 0; i < lck->data->num_share_modes; i++) {
1036 validate_my_share_entries(conn->sconn, i,
1037 &lck->data->share_modes[i]);
1038 }
1039 #endif
1040
1041 if (!lp_share_modes(SNUM(conn))) {
1042 return NT_STATUS_OK;
1043 }
1044
1045 /* Now we check the share modes, after any oplock breaks. */
1046 for(i = 0; i < lck->data->num_share_modes; i++) {
1047
1048 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1049 continue;
1050 }
1051
1052 /* someone else has a share lock on it, check to see if we can
1053 * too */
1054 if (share_conflict(&lck->data->share_modes[i],
1055 access_mask, share_access)) {
1056
1057 if (share_mode_stale_pid(lck->data, i)) {
1058 continue;
1059 }
1060
1061 *file_existed = true;
1062
1063 return NT_STATUS_SHARING_VIOLATION;
1064 }
1065 }
1066
1067 if (lck->data->num_share_modes != 0) {
1068 *file_existed = true;
1069 }
1070
1071 return NT_STATUS_OK;
1072 }
1073
1074 static bool is_delete_request(files_struct *fsp) {
1075 return ((fsp->access_mask == DELETE_ACCESS) &&
1076 (fsp->oplock_type == NO_OPLOCK));
1077 }
1078
1079 /*
1080 * Send a break message to the oplock holder and delay the open for
1081 * our client.
1082 */
1083
1084 static NTSTATUS send_break_message(files_struct *fsp,
1085 struct share_mode_entry *exclusive,
1086 uint64_t mid,
1087 int oplock_request)
1088 {
1089 NTSTATUS status;
1090 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1091
1092 DEBUG(10, ("Sending break request to PID %s\n",
1093 procid_str_static(&exclusive->pid)));
1094 exclusive->op_mid = mid;
1095
1096 /* Create the message. */
1097 share_mode_entry_to_message(msg, exclusive);
1098
1099 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1100 don't want this set in the share mode struct pointed to by lck. */
1101
1102 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1103 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1104 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1105 }
1106
1107 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1108 MSG_SMB_BREAK_REQUEST,
1109 (uint8 *)msg,
1110 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1111 if (!NT_STATUS_IS_OK(status)) {
1112 DEBUG(3, ("Could not send oplock break message: %s\n",
1113 nt_errstr(status)));
1114 }
1115
1116 return status;
1117 }
1118
1119 /*
1120 * Return share_mode_entry pointers for :
1121 * 1). Batch oplock entry.
1122 * 2). Batch or exclusive oplock entry (may be identical to #1).
1123 * bool have_level2_oplock
1124 * bool have_no_oplock.
1125 * Do internal consistency checks on the share mode for a file.
1126 */
1127
1128 static void find_oplock_types(files_struct *fsp,
1129 int oplock_request,
1130 const struct share_mode_lock *lck,
1131 struct share_mode_entry **pp_batch,
1132 struct share_mode_entry **pp_ex_or_batch,
1133 bool *got_level2,
1134 bool *got_no_oplock)
1135 {
1136 int i;
1137
1138 *pp_batch = NULL;
1139 *pp_ex_or_batch = NULL;
1140 *got_level2 = false;
1141 *got_no_oplock = false;
1142
1143 /* Ignore stat or internal opens, as is done in
1144 delay_for_batch_oplocks() and
1145 delay_for_exclusive_oplocks().
1146 */
1147 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1148 return;
1149 }
1150
1151 for (i=0; i<lck->data->num_share_modes; i++) {
1152 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1153 continue;
1154 }
1155
1156 if (lck->data->share_modes[i].op_type == NO_OPLOCK &&
1157 is_stat_open(lck->data->share_modes[i].access_mask)) {
1158 /* We ignore stat opens in the table - they
1159 always have NO_OPLOCK and never get or
1160 cause breaks. JRA. */
1161 continue;
1162 }
1163
1164 if (BATCH_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1165 /* batch - can only be one. */
1166 if (share_mode_stale_pid(lck->data, i)) {
1167 DEBUG(10, ("Found stale batch oplock\n"));
1168 continue;
1169 }
1170 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1171 smb_panic("Bad batch oplock entry.");
1172 }
1173 *pp_batch = &lck->data->share_modes[i];
1174 }
1175
1176 if (EXCLUSIVE_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1177 if (share_mode_stale_pid(lck->data, i)) {
1178 DEBUG(10, ("Found stale duplicate oplock\n"));
1179 continue;
1180 }
1181 /* Exclusive or batch - can only be one. */
1182 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1183 smb_panic("Bad exclusive or batch oplock entry.");
1184 }
1185 *pp_ex_or_batch = &lck->data->share_modes[i];
1186 }
1187
1188 if (LEVEL_II_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1189 if (*pp_batch || *pp_ex_or_batch) {
1190 if (share_mode_stale_pid(lck->data, i)) {
1191 DEBUG(10, ("Found stale LevelII "
1192 "oplock\n"));
1193 continue;
1194 }
1195 smb_panic("Bad levelII oplock entry.");
1196 }
1197 *got_level2 = true;
1198 }
1199
1200 if (lck->data->share_modes[i].op_type == NO_OPLOCK) {
1201 if (*pp_batch || *pp_ex_or_batch) {
1202 if (share_mode_stale_pid(lck->data, i)) {
1203 DEBUG(10, ("Found stale NO_OPLOCK "
1204 "entry\n"));
1205 continue;
1206 }
1207 smb_panic("Bad no oplock entry.");
1208 }
1209 *got_no_oplock = true;
1210 }
1211 }
1212 }
1213
1214 static bool delay_for_batch_oplocks(files_struct *fsp,
1215 uint64_t mid,
1216 int oplock_request,
1217 struct share_mode_entry *batch_entry)
1218 {
1219 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1220 return false;
1221 }
1222 if (batch_entry == NULL) {
1223 return false;
1224 }
1225
1226 /* Found a batch oplock */
1227 send_break_message(fsp, batch_entry, mid, oplock_request);
1228 return true;
1229 }
1230
1231 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1232 uint64_t mid,
1233 int oplock_request,
1234 struct share_mode_entry *ex_entry)
1235 {
1236 bool delay_it;
1237
1238 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1239 return false;
1240 }
1241 if (ex_entry == NULL) {
1242 return false;
1243 }
1244
1245 /* Found an exclusive or batch oplock */
1246
1247 delay_it = is_delete_request(fsp) ?
1248 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1249
1250 if (!delay_it) {
1251 return false;
1252 }
1253
1254 send_break_message(fsp, ex_entry, mid, oplock_request);
1255 return true;
1256 }
1257
1258 static bool file_has_brlocks(files_struct *fsp)
1259 {
1260 struct byte_range_lock *br_lck;
1261
1262 br_lck = brl_get_locks_readonly(fsp);
1263 if (!br_lck)
1264 return false;
1265
1266 return br_lck->num_locks > 0 ? true : false;
1267 }
1268
1269 static void grant_fsp_oplock_type(files_struct *fsp,
1270 int oplock_request,
1271 bool got_level2_oplock,
1272 bool got_a_none_oplock)
1273 {
1274 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1275 lp_level2_oplocks(SNUM(fsp->conn));
1276
1277 /* Start by granting what the client asked for,
1278 but ensure no SAMBA_PRIVATE bits can be set. */
1279 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1280
1281 if (oplock_request & INTERNAL_OPEN_ONLY) {
1282 /* No oplocks on internal open. */
1283 fsp->oplock_type = NO_OPLOCK;
1284 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1285 fsp->oplock_type, fsp_str_dbg(fsp)));
1286 return;
1287 }
1288
1289 if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1290 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1291 fsp_str_dbg(fsp)));
1292 fsp->oplock_type = NO_OPLOCK;
1293 }
1294
1295 if (is_stat_open(fsp->access_mask)) {
1296 /* Leave the value already set. */
1297 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1298 fsp->oplock_type, fsp_str_dbg(fsp)));
1299 return;
1300 }
1301
1302 /*
1303 * Match what was requested (fsp->oplock_type) with
1304 * what was found in the existing share modes.
1305 */
1306
1307 if (got_a_none_oplock) {
1308 fsp->oplock_type = NO_OPLOCK;
1309 } else if (got_level2_oplock) {
1310 if (fsp->oplock_type == NO_OPLOCK ||
1311 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1312 /* Store a level2 oplock, but don't tell the client */
1313 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1314 } else {
1315 fsp->oplock_type = LEVEL_II_OPLOCK;
1316 }
1317 } else {
1318 /* All share_mode_entries are placeholders or deferred.
1319 * Silently upgrade to fake levelII if the client didn't
1320 * ask for an oplock. */
1321 if (fsp->oplock_type == NO_OPLOCK) {
1322 /* Store a level2 oplock, but don't tell the client */
1323 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1324 }
1325 }
1326
1327 /*
1328 * Don't grant level2 to clients that don't want them
1329 * or if we've turned them off.
1330 */
1331 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1332 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1333 }
1334
1335 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1336 fsp->oplock_type, fsp_str_dbg(fsp)));
1337 }
1338
1339 bool request_timed_out(struct timeval request_time,
1340 struct timeval timeout)
1341 {
1342 struct timeval now, end_time;
1343 GetTimeOfDay(&now);
1344 end_time = timeval_sum(&request_time, &timeout);
1345 return (timeval_compare(&end_time, &now) < 0);
1346 }
1347
1348 /****************************************************************************
1349 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1350 ****************************************************************************/
1351
1352 static void defer_open(struct share_mode_lock *lck,
1353 struct timeval request_time,
1354 struct timeval timeout,
1355 struct smb_request *req,
1356 struct deferred_open_record *state)
1357 {
1358 struct server_id self = messaging_server_id(req->sconn->msg_ctx);
1359
1360 /* Paranoia check */
1361
1362 if (lck) {
1363 int i;
1364
1365 for (i=0; i<lck->data->num_share_modes; i++) {
1366 struct share_mode_entry *e = &lck->data->share_modes[i];
1367
1368 if (is_deferred_open_entry(e) &&
1369 serverid_equal(&self, &e->pid) &&
1370 (e->op_mid == req->mid)) {
1371 DEBUG(0, ("Trying to defer an already deferred "
1372 "request: mid=%llu, exiting\n",
1373 (unsigned long long)req->mid));
1374 exit_server("attempt to defer a deferred request");
1375 }
1376 }
1377 }
1378
1379 /* End paranoia check */
1380
1381 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1382 "open entry for mid %llu\n",
1383 (unsigned int)request_time.tv_sec,
1384 (unsigned int)request_time.tv_usec,
1385 (unsigned long long)req->mid));
1386
1387 if (!push_deferred_open_message_smb(req, request_time, timeout,
1388 state->id, (char *)state, sizeof(*state))) {
1389 exit_server("push_deferred_open_message_smb failed");
1390 }
1391 if (lck) {
1392 add_deferred_open(lck, req->mid, request_time, self, state->id);
1393 }
1394 }
1395
1396
1397 /****************************************************************************
1398 On overwrite open ensure that the attributes match.
1399 ****************************************************************************/
1400
1401 bool open_match_attributes(connection_struct *conn,
1402 uint32 old_dos_attr,
1403 uint32 new_dos_attr,
1404 mode_t existing_unx_mode,
1405 mode_t new_unx_mode,
1406 mode_t *returned_unx_mode)
1407 {
1408 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1409
1410 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1411 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1412
1413 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1414 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1415 *returned_unx_mode = new_unx_mode;
1416 } else {
1417 *returned_unx_mode = (mode_t)0;
1418 }
1419
1420 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1421 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1422 "returned_unx_mode = 0%o\n",
1423 (unsigned int)old_dos_attr,
1424 (unsigned int)existing_unx_mode,
1425 (unsigned int)new_dos_attr,
1426 (unsigned int)*returned_unx_mode ));
1427
1428 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1429 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1430 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1431 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1432 return False;
1433 }
1434 }
1435 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1436 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1437 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1438 return False;
1439 }
1440 }
1441 return True;
1442 }
1443
1444 /****************************************************************************
1445 Special FCB or DOS processing in the case of a sharing violation.
1446 Try and find a duplicated file handle.
1447 ****************************************************************************/
1448
1449 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
1450 connection_struct *conn,
1451 files_struct *fsp_to_dup_into,
1452 const struct smb_filename *smb_fname,
1453 struct file_id id,
1454 uint16 file_pid,
1455 uint64_t vuid,
1456 uint32 access_mask,
1457 uint32 share_access,
1458 uint32 create_options)
1459 {
1460 files_struct *fsp;
1461
1462 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1463 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1464
1465 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1466 fsp = file_find_di_next(fsp)) {
1467
1468 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1469 "vuid = %llu, file_pid = %u, private_options = 0x%x "
1470 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1471 fsp->fh->fd, (unsigned long long)fsp->vuid,
1472 (unsigned int)fsp->file_pid,
1473 (unsigned int)fsp->fh->private_options,
1474 (unsigned int)fsp->access_mask ));
1475
1476 if (fsp->fh->fd != -1 &&
1477 fsp->vuid == vuid &&
1478 fsp->file_pid == file_pid &&
1479 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1480 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1481 (fsp->access_mask & FILE_WRITE_DATA) &&
1482 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1483 strequal(fsp->fsp_name->stream_name,
1484 smb_fname->stream_name)) {
1485 DEBUG(10,("fcb_or_dos_open: file match\n"));
1486 break;
1487 }
1488 }
1489
1490 if (!fsp) {
1491 return NT_STATUS_NOT_FOUND;
1492 }
1493
1494 /* quite an insane set of semantics ... */
1495 if (is_executable(smb_fname->base_name) &&
1496 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1497 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1498 return NT_STATUS_INVALID_PARAMETER;
1499 }
1500
1501 /* We need to duplicate this fsp. */
1502 return dup_file_fsp(req, fsp, access_mask, share_access,
1503 create_options, fsp_to_dup_into);
1504 }
1505
1506 static void schedule_defer_open(struct share_mode_lock *lck,
1507 struct timeval request_time,
1508 struct smb_request *req)
1509 {
1510 struct deferred_open_record state;
1511
1512 /* This is a relative time, added to the absolute
1513 request_time value to get the absolute timeout time.
1514 Note that if this is the second or greater time we enter
1515 this codepath for this particular request mid then
1516 request_time is left as the absolute time of the *first*
1517 time this request mid was processed. This is what allows
1518 the request to eventually time out. */
1519
1520 struct timeval timeout;
1521
1522 /* Normally the smbd we asked should respond within
1523 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1524 * the client did, give twice the timeout as a safety
1525 * measure here in case the other smbd is stuck
1526 * somewhere else. */
1527
1528 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1529
1530 /* Nothing actually uses state.delayed_for_oplocks
1531 but it's handy to differentiate in debug messages
1532 between a 30 second delay due to oplock break, and
1533 a 1 second delay for share mode conflicts. */
1534
1535 state.delayed_for_oplocks = True;
1536 state.async_open = false;
1537 state.id = lck->data->id;
1538
1539 if (!request_timed_out(request_time, timeout)) {
1540 defer_open(lck, request_time, timeout, req, &state);
1541 }
1542 }
1543
1544 /****************************************************************************
1545 Work out what access_mask to use from what the client sent us.
1546 ****************************************************************************/
1547
1548 static NTSTATUS smbd_calculate_maximum_allowed_access(
1549 connection_struct *conn,
1550 const struct smb_filename *smb_fname,
1551 uint32_t *p_access_mask)
1552 {
1553 struct security_descriptor *sd;
1554 uint32_t access_granted;
1555 NTSTATUS status;
1556
1557 if (get_current_uid(conn) == (uid_t)0) {
1558 *p_access_mask |= FILE_GENERIC_ALL;
1559 return NT_STATUS_OK;
1560 }
1561
1562 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1563 (SECINFO_OWNER |
1564 SECINFO_GROUP |
1565 SECINFO_DACL),&sd);
1566
1567 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1568 /*
1569 * File did not exist
1570 */
1571 *p_access_mask = FILE_GENERIC_ALL;
1572 return NT_STATUS_OK;
1573 }
1574 if (!NT_STATUS_IS_OK(status)) {
1575 DEBUG(10,("smbd_calculate_access_mask: "
1576 "Could not get acl on file %s: %s\n",
1577 smb_fname_str_dbg(smb_fname),
1578 nt_errstr(status)));
1579 return NT_STATUS_ACCESS_DENIED;
1580 }
1581
1582 /*
1583 * Never test FILE_READ_ATTRIBUTES. se_access_check()
1584 * also takes care of owner WRITE_DAC and READ_CONTROL.
1585 */
1586 status = se_access_check(sd,
1587 get_current_nttok(conn),
1588 (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1589 &access_granted);
1590
1591 TALLOC_FREE(sd);
1592
1593 if (!NT_STATUS_IS_OK(status)) {
1594 DEBUG(10, ("smbd_calculate_access_mask: "
1595 "Access denied on file %s: "
1596 "when calculating maximum access\n",
1597 smb_fname_str_dbg(smb_fname)));
1598 return NT_STATUS_ACCESS_DENIED;
1599 }
1600 *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1601 return NT_STATUS_OK;
1602 }
1603
1604 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1605 const struct smb_filename *smb_fname,
1606 uint32_t access_mask,
1607 uint32_t *access_mask_out)
1608 {
1609 NTSTATUS status;
1610 uint32_t orig_access_mask = access_mask;
1611 uint32_t rejected_share_access;
1612
1613 /*
1614 * Convert GENERIC bits to specific bits.
1615 */
1616
1617 se_map_generic(&access_mask, &file_generic_mapping);
1618
1619 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1620 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1621
1622 status = smbd_calculate_maximum_allowed_access(
1623 conn, smb_fname, &access_mask);
1624
1625 if (!NT_STATUS_IS_OK(status)) {
1626 return status;
1627 }
1628
1629 access_mask &= conn->share_access;
1630 }
1631
1632 rejected_share_access = access_mask & ~(conn->share_access);
1633
1634 if (rejected_share_access) {
1635 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1636 "file %s: rejected by share access mask[0x%08X] "
1637 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1638 smb_fname_str_dbg(smb_fname),
1639 conn->share_access,
1640 orig_access_mask, access_mask,
1641 rejected_share_access));
1642 return NT_STATUS_ACCESS_DENIED;
1643 }
1644
1645 *access_mask_out = access_mask;
1646 return NT_STATUS_OK;
1647 }
1648
1649 /****************************************************************************
1650 Remove the deferred open entry under lock.
1651 ****************************************************************************/
1652
1653 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1654 struct server_id pid)
1655 {
1656 struct share_mode_lock *lck = get_existing_share_mode_lock(
1657 talloc_tos(), id);
1658 if (lck == NULL) {
1659 DEBUG(0, ("could not get share mode lock\n"));
1660 return;
1661 }
1662 del_deferred_open_entry(lck, mid, pid);
1663 TALLOC_FREE(lck);
1664 }
1665
1666 /****************************************************************************
1667 Open a file with a share mode. Passed in an already created files_struct *.
1668 ****************************************************************************/
1669
1670 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1671 struct smb_request *req,
1672 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1673 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1674 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1675 uint32 create_options, /* options such as delete on close. */
1676 uint32 new_dos_attributes, /* attributes used for new file. */
1677 int oplock_request, /* internal Samba oplock codes. */
1678 /* Information (FILE_EXISTS etc.) */
1679 uint32_t private_flags, /* Samba specific flags. */
1680 int *pinfo,
1681 files_struct *fsp)
1682 {
1683 struct smb_filename *smb_fname = fsp->fsp_name;
1684 int flags=0;
1685 int flags2=0;
1686 bool file_existed = VALID_STAT(smb_fname->st);
1687 bool def_acl = False;
1688 bool posix_open = False;
1689 bool new_file_created = False;
1690 bool clear_ads = false;
1691 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1692 mode_t new_unx_mode = (mode_t)0;
1693 mode_t unx_mode = (mode_t)0;
1694 int info;
1695 uint32 existing_dos_attributes = 0;
1696 struct timeval request_time = timeval_zero();
1697 struct share_mode_lock *lck = NULL;
1698 uint32 open_access_mask = access_mask;
1699 NTSTATUS status;
1700 char *parent_dir;
1701
1702 if (conn->printer) {
1703 /*
1704 * Printers are handled completely differently.
1705 * Most of the passed parameters are ignored.
1706 */
1707
1708 if (pinfo) {
1709 *pinfo = FILE_WAS_CREATED;
1710 }
1711
1712 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1713 smb_fname_str_dbg(smb_fname)));
1714
1715 if (!req) {
1716 DEBUG(0,("open_file_ntcreate: printer open without "
1717 "an SMB request!\n"));
1718 return NT_STATUS_INTERNAL_ERROR;
1719 }
1720
1721 return print_spool_open(fsp, smb_fname->base_name,
1722 req->vuid);
1723 }
1724
1725 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1726 NULL)) {
1727 return NT_STATUS_NO_MEMORY;
1728 }
1729
1730 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1731 posix_open = True;
1732 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1733 new_dos_attributes = 0;
1734 } else {
1735 /* Windows allows a new file to be created and
1736 silently removes a FILE_ATTRIBUTE_DIRECTORY
1737 sent by the client. Do the same. */
1738
1739 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1740
1741 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1742 * created new. */
1743 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1744 smb_fname, parent_dir);
1745 }
1746
1747 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1748 "access_mask=0x%x share_access=0x%x "
1749 "create_disposition = 0x%x create_options=0x%x "
1750 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1751 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1752 access_mask, share_access, create_disposition,
1753 create_options, (unsigned int)unx_mode, oplock_request,
1754 (unsigned int)private_flags));
1755
1756 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1757 DEBUG(0, ("No smb request but not an internal only open!\n"));
1758 return NT_STATUS_INTERNAL_ERROR;
1759 }
1760
1761 /*
1762 * Only non-internal opens can be deferred at all
1763 */
1764
1765 if (req) {
1766 void *ptr;
1767 if (get_deferred_open_message_state(req,
1768 &request_time,
1769 &ptr)) {
1770
1771 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1772 /* Remember the absolute time of the original
1773 request with this mid. We'll use it later to
1774 see if this has timed out. */
1775
1776 /* Remove the deferred open entry under lock. */
1777 remove_deferred_open_entry(
1778 state->id, req->mid,
1779 messaging_server_id(req->sconn->msg_ctx));
1780
1781 /* Ensure we don't reprocess this message. */
1782 remove_deferred_open_message_smb(req->sconn, req->mid);
1783 }
1784 }
1785
1786 if (!posix_open) {
1787 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1788 if (file_existed) {
1789 existing_dos_attributes = dos_mode(conn, smb_fname);
1790 }
1791 }
1792
1793 /* ignore any oplock requests if oplocks are disabled */
1794 if (!lp_oplocks(SNUM(conn)) ||
1795 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1796 /* Mask off everything except the private Samba bits. */
1797 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1798 }
1799
1800 /* this is for OS/2 long file names - say we don't support them */
1801 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1802 /* OS/2 Workplace shell fix may be main code stream in a later
1803 * release. */
1804 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1805 "supported.\n"));
1806 if (use_nt_status()) {
1807 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1808 }
1809 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1810 }
1811
1812 switch( create_disposition ) {
1813 /*
1814 * Currently we're using FILE_SUPERSEDE as the same as
1815 * FILE_OVERWRITE_IF but they really are
1816 * different. FILE_SUPERSEDE deletes an existing file
1817 * (requiring delete access) then recreates it.
1818 */
1819 case FILE_SUPERSEDE:
1820 /* If file exists replace/overwrite. If file doesn't
1821 * exist create. */
1822 flags2 |= (O_CREAT | O_TRUNC);
1823 clear_ads = true;
1824 break;
1825
1826 case FILE_OVERWRITE_IF:
1827 /* If file exists replace/overwrite. If file doesn't
1828 * exist create. */
1829 flags2 |= (O_CREAT | O_TRUNC);
1830 clear_ads = true;
1831 break;
1832
1833 case FILE_OPEN:
1834 /* If file exists open. If file doesn't exist error. */
1835 if (!file_existed) {
1836 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1837 "requested for file %s and file "
1838 "doesn't exist.\n",
1839 smb_fname_str_dbg(smb_fname)));
1840 errno = ENOENT;
1841 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1842 }
1843 break;
1844
1845 case FILE_OVERWRITE:
1846 /* If file exists overwrite. If file doesn't exist
1847 * error. */
1848 if (!file_existed) {
1849 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1850 "requested for file %s and file "
1851 "doesn't exist.\n",
1852 smb_fname_str_dbg(smb_fname) ));
1853 errno = ENOENT;
1854 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1855 }
1856 flags2 |= O_TRUNC;
1857 clear_ads = true;
1858 break;
1859
1860 case FILE_CREATE:
1861 /* If file exists error. If file doesn't exist
1862 * create. */
1863 if (file_existed) {
1864 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1865 "requested for file %s and file "
1866 "already exists.\n",
1867 smb_fname_str_dbg(smb_fname)));
1868 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1869 errno = EISDIR;
1870 } else {
1871 errno = EEXIST;
1872 }
1873 return map_nt_error_from_unix(errno);
1874 }
1875 flags2 |= (O_CREAT|O_EXCL);
1876 break;
1877
1878 case FILE_OPEN_IF:
1879 /* If file exists open. If file doesn't exist
1880 * create. */
1881 flags2 |= O_CREAT;
1882 break;
1883
1884 default:
1885 return NT_STATUS_INVALID_PARAMETER;
1886 }
1887
1888 /* We only care about matching attributes on file exists and
1889 * overwrite. */
1890
1891 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1892 (create_disposition == FILE_OVERWRITE_IF))) {
1893 if (!open_match_attributes(conn, existing_dos_attributes,
1894 new_dos_attributes,
1895 smb_fname->st.st_ex_mode,
1896 unx_mode, &new_unx_mode)) {
1897 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1898 "for file %s (%x %x) (0%o, 0%o)\n",
1899 smb_fname_str_dbg(smb_fname),
1900 existing_dos_attributes,
1901 new_dos_attributes,
1902 (unsigned int)smb_fname->st.st_ex_mode,
1903 (unsigned int)unx_mode ));
1904 errno = EACCES;
1905 return NT_STATUS_ACCESS_DENIED;
1906 }
1907 }
1908
1909 status = smbd_calculate_access_mask(conn, smb_fname,
1910 access_mask,
1911 &access_mask);
1912 if (!NT_STATUS_IS_OK(status)) {
1913 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1914 "on file %s returned %s\n",
1915 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1916 return status;
1917 }
1918
1919 open_access_mask = access_mask;
1920
1921 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1922 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1923 }
1924
1925 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1926 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1927 access_mask));
1928
1929 /*
1930 * Note that we ignore the append flag as append does not
1931 * mean the same thing under DOS and Unix.
1932 */
1933
1934 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1935 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1936 /* DENY_DOS opens are always underlying read-write on the
1937 file handle, no matter what the requested access mask
1938 says. */
1939 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1940 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1941 flags = O_RDWR;
1942 } else {
1943 flags = O_WRONLY;
1944 }
1945 } else {
1946 flags = O_RDONLY;
1947 }
1948
1949 /*
1950 * Currently we only look at FILE_WRITE_THROUGH for create options.
1951 */
1952
1953 #if defined(O_SYNC)
1954 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1955 flags2 |= O_SYNC;
1956 }
1957 #endif /* O_SYNC */
1958
1959 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1960 flags2 |= O_APPEND;
1961 }
1962
1963 if (!posix_open && !CAN_WRITE(conn)) {
1964 /*
1965 * We should really return a permission denied error if either
1966 * O_CREAT or O_TRUNC are set, but for compatibility with
1967 * older versions of Samba we just AND them out.
1968 */
1969 flags2 &= ~(O_CREAT|O_TRUNC);
1970 }
1971
1972 /*
1973 * Ensure we can't write on a read-only share or file.
1974 */
1975
1976 if (flags != O_RDONLY && file_existed &&
1977 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1978 DEBUG(5,("open_file_ntcreate: write access requested for "
1979 "file %s on read only %s\n",
1980 smb_fname_str_dbg(smb_fname),
1981 !CAN_WRITE(conn) ? "share" : "file" ));
1982 errno = EACCES;
1983 return NT_STATUS_ACCESS_DENIED;
1984 }
1985
1986 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1987 fsp->share_access = share_access;
1988 fsp->fh->private_options = private_flags;
1989 fsp->access_mask = open_access_mask; /* We change this to the
1990 * requested access_mask after
1991 * the open is done. */
1992 fsp->posix_open = posix_open;
1993
1994 /* Ensure no SAMBA_PRIVATE bits can be set. */
1995 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1996
1997 if (timeval_is_zero(&request_time)) {
1998 request_time = fsp->open_time;
1999 }
2000
2001 if (file_existed) {
2002 struct share_mode_entry *batch_entry = NULL;
2003 struct share_mode_entry *exclusive_entry = NULL;
2004 bool got_level2_oplock = false;
2005 bool got_a_none_oplock = false;
2006 struct file_id id;
2007
2008 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2009 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2010
2011 lck = get_share_mode_lock(talloc_tos(), id,
2012 conn->connectpath,
2013 smb_fname, &old_write_time);
2014 if (lck == NULL) {
2015 DEBUG(0, ("Could not get share mode lock\n"));
2016 return NT_STATUS_SHARING_VIOLATION;
2017 }
2018
2019 /* Get the types we need to examine. */
2020 find_oplock_types(fsp,
2021 oplock_request,
2022 lck,
2023 &batch_entry,
2024 &exclusive_entry,
2025 &got_level2_oplock,
2026 &got_a_none_oplock);
2027
2028 /* First pass - send break only on batch oplocks. */
2029 if ((req != NULL) &&
2030 delay_for_batch_oplocks(fsp,
2031 req->mid,
2032 oplock_request,
2033 batch_entry)) {
2034 schedule_defer_open(lck, request_time, req);
2035 TALLOC_FREE(lck);
2036 return NT_STATUS_SHARING_VIOLATION;
2037 }
2038
2039 /* Use the client requested access mask here, not the one we
2040 * open with. */
2041 status = open_mode_check(conn, lck, fsp->name_hash,
2042 access_mask, share_access,
2043 create_options, &file_existed);
2044
2045 if (NT_STATUS_IS_OK(status)) {
2046 /* We might be going to allow this open. Check oplock
2047 * status again. */
2048 /* Second pass - send break for both batch or
2049 * exclusive oplocks. */
2050 if ((req != NULL) &&
2051 delay_for_exclusive_oplocks(
2052 fsp,
2053 req->mid,
2054 oplock_request,
2055 exclusive_entry)) {
2056 schedule_defer_open(lck, request_time, req);
2057 TALLOC_FREE(lck);
2058 return NT_STATUS_SHARING_VIOLATION;
2059 }
2060 }
2061
2062 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2063 /* DELETE_PENDING is not deferred for a second */
2064 TALLOC_FREE(lck);
2065 return status;
2066 }
2067
2068 grant_fsp_oplock_type(fsp,
2069 oplock_request,
2070 got_level2_oplock,
2071 got_a_none_oplock);
2072
2073 if (!NT_STATUS_IS_OK(status)) {
2074 uint32 can_access_mask;
2075 bool can_access = True;
2076
2077 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2078
2079 /* Check if this can be done with the deny_dos and fcb
2080 * calls. */
2081 if (private_flags &
2082 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2083 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2084 if (req == NULL) {
2085 DEBUG(0, ("DOS open without an SMB "
2086 "request!\n"));
2087 TALLOC_FREE(lck);
2088 return NT_STATUS_INTERNAL_ERROR;
2089 }
2090
2091 /* Use the client requested access mask here,
2092 * not the one we open with. */
2093 status = fcb_or_dos_open(req,
2094 conn,
2095 fsp,
2096 smb_fname,
2097 id,
2098 req->smbpid,
2099 req->vuid,
2100 access_mask,
2101 share_access,
2102 create_options);
2103
2104 if (NT_STATUS_IS_OK(status)) {
2105 TALLOC_FREE(lck);
2106 if (pinfo) {
2107 *pinfo = FILE_WAS_OPENED;
2108 }
2109 return NT_STATUS_OK;
2110 }
2111 }
2112
2113 /*
2114 * This next line is a subtlety we need for
2115 * MS-Access. If a file open will fail due to share
2116 * permissions and also for security (access) reasons,
2117 * we need to return the access failed error, not the
2118 * share error. We can't open the file due to kernel
2119 * oplock deadlock (it's possible we failed above on
2120 * the open_mode_check()) so use a userspace check.
2121 */
2122
2123 if (flags & O_RDWR) {
2124 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2125 } else if (flags & O_WRONLY) {
2126 can_access_mask = FILE_WRITE_DATA;
2127 } else {
2128 can_access_mask = FILE_READ_DATA;
2129 }
2130
2131 if (((can_access_mask & FILE_WRITE_DATA) &&
2132 !CAN_WRITE(conn)) ||
2133 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2134 smb_fname, can_access_mask))) {
2135 can_access = False;
2136 }
2137
2138 /*
2139 * If we're returning a share violation, ensure we
2140 * cope with the braindead 1 second delay.
2141 */
2142
2143 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2144 lp_defer_sharing_violations()) {
2145 struct timeval timeout;
2146 struct deferred_open_record state;
2147 int timeout_usecs;
2148
2149 /* this is a hack to speed up torture tests
2150 in 'make test' */
2151 timeout_usecs = lp_parm_int(SNUM(conn),
2152 "smbd","sharedelay",
2153 SHARING_VIOLATION_USEC_WAIT);
2154
2155 /* This is a relative time, added to the absolute
2156 request_time value to get the absolute timeout time.
2157 Note that if this is the second or greater time we enter
2158 this codepath for this particular request mid then
2159 request_time is left as the absolute time of the *first*
2160 time this request mid was processed. This is what allows
2161 the request to eventually time out. */
2162
2163 timeout = timeval_set(0, timeout_usecs);
2164
2165 /* Nothing actually uses state.delayed_for_oplocks
2166 but it's handy to differentiate in debug messages
2167 between a 30 second delay due to oplock break, and
2168 a 1 second delay for share mode conflicts. */
2169
2170 state.delayed_for_oplocks = False;
2171 state.async_open = false;
2172 state.id = id;
2173
2174 if ((req != NULL)
2175 && !request_timed_out(request_time,
2176 timeout)) {
2177 defer_open(lck, request_time, timeout,
2178 req, &state);
2179 }
2180 }
2181
2182 TALLOC_FREE(lck);
2183 if (can_access) {
2184 /*
2185 * We have detected a sharing violation here
2186 * so return the correct error code
2187 */
2188 status = NT_STATUS_SHARING_VIOLATION;
2189 } else {
2190 status = NT_STATUS_ACCESS_DENIED;
2191 }
2192 return status;
2193 }
2194
2195 /*
2196 * We exit this block with the share entry *locked*.....
2197 */
2198 }
2199
2200 SMB_ASSERT(!file_existed || (lck != NULL));
2201
2202 /*
2203 * Ensure we pay attention to default ACLs on directories if required.
2204 */
2205
2206 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2207 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2208 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2209 }
2210
2211 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2212 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2213 (unsigned int)flags, (unsigned int)flags2,
2214 (unsigned int)unx_mode, (unsigned int)access_mask,
2215 (unsigned int)open_access_mask));
2216
2217 /*
2218 * open_file strips any O_TRUNC flags itself.
2219 */
2220
2221 fsp_open = open_file(fsp, conn, req, parent_dir,
2222 flags|flags2, unx_mode, access_mask,
2223 open_access_mask);
2224
2225 if (!NT_STATUS_IS_OK(fsp_open)) {
2226 TALLOC_FREE(lck);
2227 return fsp_open;
2228 }
2229
2230 if (!file_existed) {
2231 struct share_mode_entry *batch_entry = NULL;
2232 struct share_mode_entry *exclusive_entry = NULL;
2233 bool got_level2_oplock = false;
2234 bool got_a_none_oplock = false;
2235 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2236 struct file_id id;
2237 /*
2238 * Deal with the race condition where two smbd's detect the
2239 * file doesn't exist and do the create at the same time. One
2240 * of them will win and set a share mode, the other (ie. this
2241 * one) should check if the requested share mode for this
2242 * create is allowed.
2243 */
2244
2245 /*
2246 * Now the file exists and fsp is successfully opened,
2247 * fsp->dev and fsp->inode are valid and should replace the
2248 * dev=0,inode=0 from a non existent file. Spotted by
2249 * Nadav Danieli <nadavd@exanet.com>. JRA.
2250 */
2251
2252 id = fsp->file_id;
2253
2254 lck = get_share_mode_lock(talloc_tos(), id,
2255 conn->connectpath,
2256 smb_fname, &old_write_time);
2257
2258 if (lck == NULL) {
2259 DEBUG(0, ("open_file_ntcreate: Could not get share "
2260 "mode lock for %s\n",
2261 smb_fname_str_dbg(smb_fname)));
2262 fd_close(fsp);
2263 return NT_STATUS_SHARING_VIOLATION;
2264 }
2265
2266 /* Get the types we need to examine. */
2267 find_oplock_types(fsp,
2268 oplock_request,
2269 lck,
2270 &batch_entry,
2271 &exclusive_entry,
2272 &got_level2_oplock,
2273 &got_a_none_oplock);
2274
2275 /* First pass - send break only on batch oplocks. */
2276 if ((req != NULL) &&
2277 delay_for_batch_oplocks(fsp,
2278 req->mid,
2279 oplock_request,
2280 batch_entry)) {
2281 schedule_defer_open(lck, request_time, req);
2282 TALLOC_FREE(lck);
2283 fd_close(fsp);
2284 return NT_STATUS_SHARING_VIOLATION;
2285 }
2286
2287 status = open_mode_check(conn, lck, fsp->name_hash,
2288 access_mask, share_access,
2289 create_options, &file_existed);
2290
2291 if (NT_STATUS_IS_OK(status)) {
2292 /* We might be going to allow this open. Check oplock
2293 * status again. */
2294 /* Second pass - send break for both batch or
2295 * exclusive oplocks. */
2296 if ((req != NULL) &&
2297 delay_for_exclusive_oplocks(
2298 fsp,
2299 req->mid,
2300 oplock_request,
2301 exclusive_entry)) {
2302 schedule_defer_open(lck, request_time, req);
2303 TALLOC_FREE(lck);
2304 fd_close(fsp);
2305 return NT_STATUS_SHARING_VIOLATION;
2306 }
2307 }
2308
2309 if (!NT_STATUS_IS_OK(status)) {
2310 struct deferred_open_record state;
2311
2312 state.delayed_for_oplocks = False;
2313 state.async_open = false;
2314 state.id = id;
2315
2316 /* Do it all over again immediately. In the second
2317 * round we will find that the file existed and handle
2318 * the DELETE_PENDING and FCB cases correctly. No need
2319 * to duplicate the code here. Essentially this is a
2320 * "goto top of this function", but don't tell
2321 * anybody... */
2322
2323 if (req != NULL) {
2324 defer_open(lck, request_time, timeval_zero(),
2325 req, &state);
2326 }
2327 TALLOC_FREE(lck);
2328 fd_close(fsp);
2329 return status;
2330 }
2331
2332 grant_fsp_oplock_type(fsp,
2333 oplock_request,
2334 got_level2_oplock,
2335 got_a_none_oplock);
2336
2337 /*
2338 * We exit this block with the share entry *locked*.....
2339 */
2340
2341 }
2342
2343 SMB_ASSERT(lck != NULL);
2344
2345 /* Delete streams if create_disposition requires it */
2346 if (file_existed && clear_ads &&
2347 !is_ntfs_stream_smb_fname(smb_fname)) {
2348 status = delete_all_streams(conn, smb_fname->base_name);
2349 if (!NT_STATUS_IS_OK(status)) {
2350 TALLOC_FREE(lck);
2351 fd_close(fsp);
2352 return status;
2353 }
2354 }
2355
2356 /* note that we ignore failure for the following. It is
2357 basically a hack for NFS, and NFS will never set one of
2358 these only read them. Nobody but Samba can ever set a deny
2359 mode and we have already checked our more authoritative
2360 locking database for permission to set this deny mode. If
2361 the kernel refuses the operations then the kernel is wrong.
2362 note that GPFS supports it as well - jmcd */
2363
2364 if (fsp->fh->fd != -1) {
2365 int ret_flock;
2366 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2367 if(ret_flock == -1 ){
2368
2369 TALLOC_FREE(lck);
2370 fd_close(fsp);
2371
2372 return NT_STATUS_SHARING_VIOLATION;
2373 }
2374 }
2375
2376 /*
2377 * At this point onwards, we can guarentee that the share entry
2378 * is locked, whether we created the file or not, and that the
2379 * deny mode is compatible with all current opens.
2380 */
2381
2382 /*
2383 * If requested, truncate the file.
2384 */
2385
2386 if (file_existed && (flags2&O_TRUNC)) {
2387 /*
2388 * We are modifying the file after open - update the stat
2389 * struct..
2390 */
2391 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2392 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2393 status = map_nt_error_from_unix(errno);
2394 TALLOC_FREE(lck);
2395 fd_close(fsp);
2396 return status;
2397 }
2398 }
2399
2400 /*
2401 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2402 * but we don't have to store this - just ignore it on access check.
2403 */
2404 if (conn->sconn->using_smb2) {
2405 /*
2406 * SMB2 doesn't return it (according to Microsoft tests).
2407 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2408 * File created with access = 0x7 (Read, Write, Delete)
2409 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2410 */
2411 fsp->access_mask = access_mask;
2412 } else {
2413 /* But SMB1 does. */
2414 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2415 }
2416
2417 if (file_existed) {
2418 /* stat opens on existing files don't get oplocks. */
2419 if (is_stat_open(open_access_mask)) {
2420 fsp->oplock_type = NO_OPLOCK;
2421 }
2422
2423 if (flags2 & O_TRUNC) {
2424 info = FILE_WAS_OVERWRITTEN;
2425 } else {
2426 info = FILE_WAS_OPENED;
2427 }
2428 } else {
2429 info = FILE_WAS_CREATED;
2430 }
2431
2432 if (pinfo) {
2433 *pinfo = info;
2434 }
2435
2436 /*
2437 * Setup the oplock info in both the shared memory and
2438 * file structs.
2439 */
2440
2441 status = set_file_oplock(fsp, fsp->oplock_type);
2442 if (!NT_STATUS_IS_OK(status)) {
2443 /*
2444 * Could not get the kernel oplock or there are byte-range
2445 * locks on the file.
2446 */
2447 fsp->oplock_type = NO_OPLOCK;
2448 }
2449
2450 set_share_mode(lck, fsp, get_current_uid(conn),
2451 req ? req->mid : 0,
2452 fsp->oplock_type);
2453
2454 /* Handle strange delete on close create semantics. */
2455 if (create_options & FILE_DELETE_ON_CLOSE) {
2456
2457 status = can_set_delete_on_close(fsp, new_dos_attributes);
2458
2459 if (!NT_STATUS_IS_OK(status)) {
2460 /* Remember to delete the mode we just added. */
2461 del_share_mode(lck, fsp);
2462 TALLOC_FREE(lck);
2463 fd_close(fsp);
2464 return status;
2465 }
2466 /* Note that here we set the *inital* delete on close flag,
2467 not the regular one. The magic gets handled in close. */
2468 fsp->initial_delete_on_close = True;
2469 }
2470
2471 if (info == FILE_WAS_OVERWRITTEN
2472 || info == FILE_WAS_CREATED
2473 || info == FILE_WAS_SUPERSEDED) {
2474 new_file_created = True;
2475 }
2476
2477 if (new_file_created) {
2478 /* Files should be initially set as archive */
2479 if (lp_map_archive(SNUM(conn)) ||
2480 lp_store_dos_attributes(SNUM(conn))) {
2481 if (!posix_open) {
2482 if (file_set_dosmode(conn, smb_fname,
2483 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2484 parent_dir, true) == 0) {
2485 unx_mode = smb_fname->st.st_ex_mode;
2486 }
2487 }
2488 }
2489 }
2490
2491 /* Determine sparse flag. */
2492 if (posix_open) {
2493 /* POSIX opens are sparse by default. */
2494 fsp->is_sparse = true;
2495 } else {
2496 fsp->is_sparse = (file_existed &&
2497 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2498 }
2499
2500 /*
2501 * Take care of inherited ACLs on created files - if default ACL not
2502 * selected.
2503 */
2504
2505 if (!posix_open && !file_existed && !def_acl) {
2506
2507 int saved_errno = errno; /* We might get ENOSYS in the next
2508 * call.. */
2509
2510 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2511 errno == ENOSYS) {
2512 errno = saved_errno; /* Ignore ENOSYS */
2513 }
2514
2515 } else if (new_unx_mode) {
2516
2517 int ret = -1;
2518
2519 /* Attributes need changing. File already existed. */
2520
2521 {
2522 int saved_errno = errno; /* We might get ENOSYS in the
2523 * next call.. */
2524 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2525
2526 if (ret == -1 && errno == ENOSYS) {
2527 errno = saved_errno; /* Ignore ENOSYS */
2528 } else {
2529 DEBUG(5, ("open_file_ntcreate: reset "
2530 "attributes of file %s to 0%o\n",
2531 smb_fname_str_dbg(smb_fname),
2532 (unsigned int)new_unx_mode));
2533 ret = 0; /* Don't do the fchmod below. */
2534 }
2535 }
2536
2537 if ((ret == -1) &&
2538 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2539 DEBUG(5, ("open_file_ntcreate: failed to reset "
2540 "attributes of file %s to 0%o\n",
2541 smb_fname_str_dbg(smb_fname),
2542 (unsigned int)new_unx_mode));
2543 }
2544
2545 /* If this is a successful open, we must remove any deferred open
2546 * records. */
2547 if (req != NULL) {
2548 del_deferred_open_entry(lck, req->mid,
2549 messaging_server_id(req->sconn->msg_ctx));
2550 }
2551 TALLOC_FREE(lck);
2552
2553 return NT_STATUS_OK;
2554 }
2555
2556
2557 /****************************************************************************
2558 Open a file for for write to ensure that we can fchmod it.
2559 ****************************************************************************/
2560
2561 NTSTATUS open_file_fchmod(connection_struct *conn,
2562 struct smb_filename *smb_fname,
2563 files_struct **result)
2564 {
2565 if (!VALID_STAT(smb_fname->st)) {
2566 return NT_STATUS_INVALID_PARAMETER;
2567 }
2568
2569 return SMB_VFS_CREATE_FILE(
2570 conn, /* conn */
2571 NULL, /* req */
2572 0, /* root_dir_fid */
2573 smb_fname, /* fname */
2574 FILE_WRITE_DATA, /* access_mask */
2575 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2576 FILE_SHARE_DELETE),
2577 FILE_OPEN, /* create_disposition*/
2578 0, /* create_options */
2579 0, /* file_attributes */
2580 INTERNAL_OPEN_ONLY, /* oplock_request */
2581 0, /* allocation_size */
2582 0, /* private_flags */
2583 NULL, /* sd */
2584 NULL, /* ea_list */
2585 result, /* result */
2586 NULL); /* pinfo */
2587 }
2588
2589 static NTSTATUS mkdir_internal(connection_struct *conn,
2590 struct smb_filename *smb_dname,
2591 uint32 file_attributes)
2592 {
2593 mode_t mode;
2594 char *parent_dir = NULL;
2595 NTSTATUS status;
2596 bool posix_open = false;
2597 bool need_re_stat = false;
2598 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2599
2600 if(access_mask & ~(conn->share_access)) {
2601 DEBUG(5,("mkdir_internal: failing share access "
2602 "%s\n", lp_servicename(SNUM(conn))));
2603 return NT_STATUS_ACCESS_DENIED;
2604 }
2605
2606 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2607 NULL)) {
2608 return NT_STATUS_NO_MEMORY;
2609 }
2610
2611 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2612 posix_open = true;
2613 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2614 } else {
2615 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2616 }
2617
2618 status = check_parent_access(conn,
2619 smb_dname,
2620 access_mask);
2621 if(!NT_STATUS_IS_OK(status)) {
2622 DEBUG(5,("mkdir_internal: check_parent_access "
2623 "on directory %s for path %s returned %s\n",
2624 parent_dir,
2625 smb_dname->base_name,
2626 nt_errstr(status) ));
2627 return status;
2628 }
2629
2630 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2631 return map_nt_error_from_unix(errno);
2632 }
2633
2634 /* Ensure we're checking for a symlink here.... */
2635 /* We don't want to get caught by a symlink racer. */
2636
2637 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2638 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2639 smb_fname_str_dbg(smb_dname), strerror(errno)));
2640 return map_nt_error_from_unix(errno);
2641 }
2642
2643 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2644 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2645 smb_fname_str_dbg(smb_dname)));
2646 return NT_STATUS_NOT_A_DIRECTORY;
2647 }
2648
2649 if (lp_store_dos_attributes(SNUM(conn))) {
2650 if (!posix_open) {
2651 file_set_dosmode(conn, smb_dname,
2652 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2653 parent_dir, true);
2654 }
2655 }
2656
2657 if (lp_inherit_perms(SNUM(conn))) {
2658 inherit_access_posix_acl(conn, parent_dir,
2659 smb_dname->base_name, mode);
2660 need_re_stat = true;
2661 }
2662
2663 if (!posix_open) {
2664 /*
2665 * Check if high bits should have been set,
2666 * then (if bits are missing): add them.
2667 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2668 * dir.
2669 */
2670 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2671 (mode & ~smb_dname->st.st_ex_mode)) {
2672 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2673 (smb_dname->st.st_ex_mode |
2674 (mode & ~smb_dname->st.st_ex_mode)));
2675 need_re_stat = true;
2676 }
2677 }
2678
2679 /* Change the owner if required. */
2680 if (lp_inherit_owner(SNUM(conn))) {
2681 change_dir_owner_to_parent(conn, parent_dir,
2682 smb_dname->base_name,
2683 &smb_dname->st);
2684 need_re_stat = true;
2685 }
2686
2687 if (need_re_stat) {
2688 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2689 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2690 smb_fname_str_dbg(smb_dname), strerror(errno)));
2691 return map_nt_error_from_unix(errno);
2692 }
2693 }
2694
2695 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2696 smb_dname->base_name);
2697
2698 return NT_STATUS_OK;
2699 }
2700
2701 /****************************************************************************
2702 Ensure we didn't get symlink raced on opening a directory.
2703 ****************************************************************************/
2704
2705 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2706 const SMB_STRUCT_STAT *sbuf2)
2707 {
2708 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2709 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2710 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2711 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2712 return false;
2713 }
2714 return true;
2715 }
2716
2717 /****************************************************************************
2718 Open a directory from an NT SMB call.
2719 ****************************************************************************/
2720
2721 static NTSTATUS open_directory(connection_struct *conn,
2722 struct smb_request *req,
2723 struct smb_filename *smb_dname,
2724 uint32 access_mask,
2725 uint32 share_access,
2726 uint32 create_disposition,
2727 uint32 create_options,
2728 uint32 file_attributes,
2729 int *pinfo,
2730 files_struct **result)
2731 {
2732 files_struct *fsp = NULL;
2733 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2734 struct share_mode_lock *lck = NULL;
2735 NTSTATUS status;
2736 struct timespec mtimespec;
2737 int info = 0;
2738
2739 if (is_ntfs_stream_smb_fname(smb_dname)) {
2740 DEBUG(2, ("open_directory: %s is a stream name!\n",
2741 smb_fname_str_dbg(smb_dname)));
2742 return NT_STATUS_NOT_A_DIRECTORY;
2743 }
2744
2745 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2746 /* Ensure we have a directory attribute. */
2747 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2748 }
2749
2750 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2751 "share_access = 0x%x create_options = 0x%x, "
2752 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2753 smb_fname_str_dbg(smb_dname),
2754 (unsigned int)access_mask,
2755 (unsigned int)share_access,
2756 (unsigned int)create_options,
2757 (unsigned int)create_disposition,
2758 (unsigned int)file_attributes));
2759
2760 status = smbd_calculate_access_mask(conn, smb_dname,
2761 access_mask, &access_mask);
2762 if (!NT_STATUS_IS_OK(status)) {
2763 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2764 "on file %s returned %s\n",
2765 smb_fname_str_dbg(smb_dname),
2766 nt_errstr(status)));
2767 return status;
2768 }
2769
2770 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2771 !security_token_has_privilege(get_current_nttok(conn),
2772 SEC_PRIV_SECURITY)) {
2773 DEBUG(10, ("open_directory: open on %s "
2774 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2775 smb_fname_str_dbg(smb_dname)));
2776 return NT_STATUS_PRIVILEGE_NOT_HELD;
2777 }
2778
2779 switch( create_disposition ) {
2780 case FILE_OPEN:
2781
2782 if (!dir_existed) {
2783 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2784 }
2785
2786 info = FILE_WAS_OPENED;
2787 break;
2788
2789 case FILE_CREATE:
2790
2791 /* If directory exists error. If directory doesn't
2792 * exist create. */
2793
2794 if (dir_existed) {
2795 status = NT_STATUS_OBJECT_NAME_COLLISION;
2796 DEBUG(2, ("open_directory: unable to create "
2797 "%s. Error was %s\n",
2798 smb_fname_str_dbg(smb_dname),
2799 nt_errstr(status)));
2800 return status;
2801 }
2802
2803 status = mkdir_internal(conn, smb_dname,
2804 file_attributes);
2805
2806 if (!NT_STATUS_IS_OK(status)) {
2807 DEBUG(2, ("open_directory: unable to create "
2808 "%s. Error was %s\n",
2809 smb_fname_str_dbg(smb_dname),
2810 nt_errstr(status)));
2811 return status;
2812 }
2813
2814 info = FILE_WAS_CREATED;
2815 break;
2816
2817 case FILE_OPEN_IF:
2818 /*
2819 * If directory exists open. If directory doesn't
2820 * exist create.
2821 */
2822
2823 if (dir_existed) {
2824 status = NT_STATUS_OK;
2825 info = FILE_WAS_OPENED;
2826 } else {
2827 status = mkdir_internal(conn, smb_dname,
2828 file_attributes);
2829
2830 if (NT_STATUS_IS_OK(status)) {
2831 info = FILE_WAS_CREATED;
2832 } else {
2833 /* Cope with create race. */
2834 if (!NT_STATUS_EQUAL(status,
2835 NT_STATUS_OBJECT_NAME_COLLISION)) {
2836 DEBUG(2, ("open_directory: unable to create "
2837 "%s. Error was %s\n",
2838 smb_fname_str_dbg(smb_dname),
2839 nt_errstr(status)));
2840 return status;
2841 }
2842 info = FILE_WAS_OPENED;
2843 }
2844 }
2845
2846 break;
2847
2848 case FILE_SUPERSEDE:
2849 case FILE_OVERWRITE:
2850 case FILE_OVERWRITE_IF:
2851 default:
2852 DEBUG(5,("open_directory: invalid create_disposition "
2853 "0x%x for directory %s\n",
2854 (unsigned int)create_disposition,
2855 smb_fname_str_dbg(smb_dname)));
2856 return NT_STATUS_INVALID_PARAMETER;
2857 }
2858
2859 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2860 DEBUG(5,("open_directory: %s is not a directory !\n",
2861 smb_fname_str_dbg(smb_dname)));
2862 return NT_STATUS_NOT_A_DIRECTORY;
2863 }
2864
2865 if (info == FILE_WAS_OPENED) {
2866 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2867 if (!NT_STATUS_IS_OK(status)) {
2868 DEBUG(10, ("open_directory: smbd_check_access_rights on "
2869 "file %s failed with %s\n",
2870 smb_fname_str_dbg(smb_dname),
2871 nt_errstr(status)));
2872 return status;
2873 }
2874 }
2875
2876 status = file_new(req, conn, &fsp);
2877 if(!NT_STATUS_IS_OK(status)) {
2878 return status;
2879 }
2880
2881 /*
2882 * Setup the files_struct for it.
2883 */
2884
2885 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2886 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2887 fsp->file_pid = req ? req->smbpid : 0;
2888 fsp->can_lock = False;
2889 fsp->can_read = False;
2890 fsp->can_write = False;
2891
2892 fsp->share_access = share_access;
2893 fsp->fh->private_options = 0;
2894 /*
2895 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2896 */
2897 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2898 fsp->print_file = NULL;
2899 fsp->modified = False;
2900 fsp->oplock_type = NO_OPLOCK;
2901 fsp->sent_oplock_break = NO_BREAK_SENT;
2902 fsp->is_directory = True;
2903 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2904 status = fsp_set_smb_fname(fsp, smb_dname);
2905 if (!NT_STATUS_IS_OK(status)) {
2906 file_free(req, fsp);
2907 return status;
2908 }
2909
2910 mtimespec = smb_dname->st.st_ex_mtime;
2911
2912 #ifdef O_DIRECTORY
2913 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2914 #else
2915 /* POSIX allows us to open a directory with O_RDONLY. */
2916 status = fd_open(conn, fsp, O_RDONLY, 0);
2917 #endif
2918 if (!NT_STATUS_IS_OK(status)) {
2919 DEBUG(5, ("open_directory: Could not open fd for "
2920 "%s (%s)\n",
2921 smb_fname_str_dbg(smb_dname),
2922 nt_errstr(status)));
2923 file_free(req, fsp);
2924 return status;
2925 }
2926
2927 status = vfs_stat_fsp(fsp);
2928 if (!NT_STATUS_IS_OK(status)) {
2929 fd_close(fsp);
2930 file_free(req, fsp);
2931 return status;
2932 }
2933
2934 /* Ensure there was no race condition. */
2935 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2936 DEBUG(5,("open_directory: stat struct differs for "
2937 "directory %s.\n",
2938 smb_fname_str_dbg(smb_dname)));
2939 fd_close(fsp);
2940 file_free(req, fsp);
2941 return NT_STATUS_ACCESS_DENIED;
2942 }
2943
2944 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2945 conn->connectpath, smb_dname,
2946 &mtimespec);
2947
2948 if (lck == NULL) {
2949 DEBUG(0, ("open_directory: Could not get share mode lock for "
2950 "%s\n", smb_fname_str_dbg(smb_dname)));
2951 fd_close(fsp);
2952 file_free(req, fsp);
2953 return NT_STATUS_SHARING_VIOLATION;
2954 }
2955
2956 status = open_mode_check(conn, lck, fsp->name_hash,
2957 access_mask, share_access,
2958 create_options, &dir_existed);
2959
2960 if (!NT_STATUS_IS_OK(status)) {
2961 TALLOC_FREE(lck);
2962 fd_close(fsp);
2963 file_free(req, fsp);
2964 return status;
2965 }
2966
2967 set_share_mode(lck, fsp, get_current_uid(conn),
2968 req ? req->mid : 0, NO_OPLOCK);
2969
2970 /* For directories the delete on close bit at open time seems
2971 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2972 if (create_options & FILE_DELETE_ON_CLOSE) {
2973 status = can_set_delete_on_close(fsp, 0);
2974 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2975 TALLOC_FREE(lck);
2976 fd_close(fsp);
2977 file_free(req, fsp);
2978 return status;
2979 }
2980
2981 if (NT_STATUS_IS_OK(status)) {
2982 /* Note that here we set the *inital* delete on close flag,
2983 not the regular one. The magic gets handled in close. */
2984 fsp->initial_delete_on_close = True;
2985 }
2986 }
2987
2988 TALLOC_FREE(lck);
2989
2990 if (pinfo) {
2991 *pinfo = info;
2992 }
2993
2994 *result = fsp;
2995 return NT_STATUS_OK;
2996 }
2997
2998 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2999 struct smb_filename *smb_dname)
3000 {
3001 NTSTATUS status;
3002 files_struct *fsp;
3003
3004 status = SMB_VFS_CREATE_FILE(
3005 conn, /* conn */
3006 req, /* req */
3007 0, /* root_dir_fid */
3008 smb_dname, /* fname */
3009 FILE_READ_ATTRIBUTES, /* access_mask */
3010 FILE_SHARE_NONE, /* share_access */
3011 FILE_CREATE, /* create_disposition*/
3012 FILE_DIRECTORY_FILE, /* create_options */
3013 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
3014 0, /* oplock_request */
3015 0, /* allocation_size */
3016 0, /* private_flags */
3017 NULL, /* sd */
3018 NULL, /* ea_list */
3019 &fsp, /* result */
3020 NULL); /* pinfo */
3021
3022 if (NT_STATUS_IS_OK(status)) {
3023 close_file(req, fsp, NORMAL_CLOSE);
3024 }
3025
3026 return status;
3027 }
3028
3029 /****************************************************************************
3030 Receive notification that one of our open files has been renamed by another
3031 smbd process.
3032 ****************************************************************************/
3033
3034 void msg_file_was_renamed(struct messaging_context *msg,
3035 void *private_data,
3036 uint32_t msg_type,
3037 struct server_id server_id,
3038 DATA_BLOB *data)
3039 {
3040 files_struct *fsp;
3041 char *frm = (char *)data->data;
3042 struct file_id id;
3043 const char *sharepath;
3044 const char *base_name;
3045 const char *stream_name;
3046 struct smb_filename *smb_fname = NULL;
3047 size_t sp_len, bn_len;
3048 NTSTATUS status;
3049 struct smbd_server_connection *sconn =
3050 talloc_get_type_abort(private_data,
3051 struct smbd_server_connection);
3052
3053 if (data->data == NULL
3054 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3055 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3056 (int)data->length));
3057 return;
3058 }
3059
3060 /* Unpack the message. */
3061 pull_file_id_24(frm, &id);
3062 sharepath = &frm[24];
3063 sp_len = strlen(sharepath);
3064 base_name = sharepath + sp_len + 1;
3065 bn_len = strlen(base_name);
3066 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3067
3068 /* stream_name must always be NULL if there is no stream. */
3069 if (stream_name[0] == '\0') {
3070 stream_name = NULL;
3071 }
3072
3073 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3074 stream_name, NULL, &smb_fname);
3075 if (!NT_STATUS_IS_OK(status)) {
3076 return;
3077 }
3078
3079 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3080 "file_id %s\n",
3081 sharepath, smb_fname_str_dbg(smb_fname),
3082 file_id_string_tos(&id)));
3083
3084 for(fsp = file_find_di_first(sconn, id); fsp;
3085 fsp = file_find_di_next(fsp)) {
3086 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3087
3088 DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
3089 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
3090 smb_fname_str_dbg(smb_fname)));
3091 status = fsp_set_smb_fname(fsp, smb_fname);
3092 if (!NT_STATUS_IS_OK(status)) {
3093 goto out;
3094 }
3095 } else {
3096 /* TODO. JRA. */
3097 /* Now we have the complete path we can work out if this is
3098 actually within this share and adjust newname accordingly. */
3099 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3100 "not sharepath %s) "
3101 "%s from %s -> %s\n",
3102 fsp->conn->connectpath,
3103 sharepath,
3104 fsp_fnum_dbg(fsp),
3105 fsp_str_dbg(fsp),
3106 smb_fname_str_dbg(smb_fname)));
3107 }
3108 }
3109 out:
3110 TALLOC_FREE(smb_fname);
3111 return;
3112 }
3113
3114 /*
3115 * If a main file is opened for delete, all streams need to be checked for
3116 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3117 * If that works, delete them all by setting the delete on close and close.
3118 */
3119
3120 NTSTATUS open_streams_for_delete(connection_struct *conn,
3121 const char *fname)
3122 {
3123 struct stream_struct *stream_info = NULL;
3124 files_struct **streams = NULL;
3125 int i;
3126 unsigned int num_streams = 0;
3127 TALLOC_CTX *frame = talloc_stackframe();
3128 NTSTATUS status;
3129
3130 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3131 &num_streams, &stream_info);
3132
3133 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3134 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3135 DEBUG(10, ("no streams around\n"));
3136 TALLOC_FREE(frame);
3137 return NT_STATUS_OK;
3138 }
3139
3140 if (!NT_STATUS_IS_OK(status)) {
3141 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3142 nt_errstr(status)));
3143 goto fail;
3144 }
3145
3146 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3147 num_streams));
3148
3149 if (num_streams == 0) {
3150 TALLOC_FREE(frame);
3151 return NT_STATUS_OK;
3152 }
3153
3154 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3155 if (streams == NULL) {
3156 DEBUG(0, ("talloc failed\n"));
3157 status = NT_STATUS_NO_MEMORY;
3158 goto fail;
3159 }
3160
3161 for (i=0; i<num_streams; i++) {
3162 struct smb_filename *smb_fname = NULL;
3163
3164 if (strequal(stream_info[i].name, "::$DATA")) {
3165 streams[i] = NULL;
3166 continue;
3167 }
3168
3169 status = create_synthetic_smb_fname(talloc_tos(), fname,
3170 stream_info[i].name,
3171 NULL, &smb_fname);
3172 if (!NT_STATUS_IS_OK(status)) {
3173 goto fail;
3174 }
3175
3176 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3177 DEBUG(10, ("Unable to stat stream: %s\n",
3178 smb_fname_str_dbg(smb_fname)));
3179 }
3180
3181 status = SMB_VFS_CREATE_FILE(
3182 conn, /* conn */
3183 NULL, /* req */
3184 0, /* root_dir_fid */
3185 smb_fname, /* fname */
3186 DELETE_ACCESS, /* access_mask */
3187 (FILE_SHARE_READ | /* share_access */
3188 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3189 FILE_OPEN, /* create_disposition*/
3190 0, /* create_options */
3191 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3192 0, /* oplock_request */
3193 0, /* allocation_size */
3194 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3195 NULL, /* sd */
3196 NULL, /* ea_list */
3197 &streams[i], /* result */
3198 NULL); /* pinfo */
3199
3200 if (!NT_STATUS_IS_OK(status)) {
3201 DEBUG(10, ("Could not open stream %s: %s\n",
3202 smb_fname_str_dbg(smb_fname),
3203 nt_errstr(status)));
3204
3205 TALLOC_FREE(smb_fname);
3206 break;
3207 }
3208 TALLOC_FREE(smb_fname);
3209 }
3210
3211 /*
3212 * don't touch the variable "status" beyond this point :-)
3213 */
3214
3215 for (i -= 1 ; i >= 0; i--) {
3216 if (streams[i] == NULL) {
3217 continue;
3218 }
3219
3220 DEBUG(10, ("Closing stream # %d, %s\n", i,
3221 fsp_str_dbg(streams[i])));
3222 close_file(NULL, streams[i], NORMAL_CLOSE);
3223 }
3224
3225 fail:
3226 TALLOC_FREE(frame);
3227 return status;
3228 }
3229
3230 /*********************************************************************
3231 Create a default ACL by inheriting from the parent. If no inheritance
3232 from the parent available, don't set anything. This will leave the actual
3233 permissions the new file or directory already got from the filesystem
3234 as the NT ACL when read.
3235 *********************************************************************/
3236
3237 static NTSTATUS inherit_new_acl(files_struct *fsp)
3238 {
3239 TALLOC_CTX *ctx = talloc_tos();
3240 char *parent_name = NULL;
3241 struct security_descriptor *parent_desc = NULL;
3242 NTSTATUS status = NT_STATUS_OK;
3243 struct security_descriptor *psd = NULL;
3244 struct dom_sid *owner_sid = NULL;
3245 struct dom_sid *group_sid = NULL;
3246 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3247 bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3248 bool inheritable_components = false;
3249 size_t size = 0;
3250
3251 if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3252 return NT_STATUS_NO_MEMORY;
3253 }
3254
3255 status = SMB_VFS_GET_NT_ACL(fsp->conn,
3256 parent_name,
3257 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3258 &parent_desc);
3259 if (!NT_STATUS_IS_OK(status)) {
3260 return status;
3261 }
3262
3263 inheritable_components = sd_has_inheritable_components(parent_desc,
3264 fsp->is_directory);
3265
3266 if (!inheritable_components && !inherit_owner) {
3267 /* Nothing to inherit and not setting owner. */
3268 return NT_STATUS_OK;
3269 }
3270
3271 /* Create an inherited descriptor from the parent. */
3272
3273 if (DEBUGLEVEL >= 10) {
3274 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3275 fsp_str_dbg(fsp) ));
3276 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3277 }
3278
3279 /* Inherit from parent descriptor if "inherit owner" set. */
3280 if (inherit_owner) {
3281 owner_sid = parent_desc->owner_sid;
3282 group_sid = parent_desc->group_sid;
3283 }
3284
3285 if (owner_sid == NULL) {
3286 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3287 }
3288 if (group_sid == NULL) {
3289 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3290 }
3291
3292 status = se_create_child_secdesc(ctx,
3293 &psd,
3294 &size,
3295 parent_desc,
3296 owner_sid,
3297 group_sid,
3298 fsp->is_directory);
3299 if (!NT_STATUS_IS_OK(status)) {
3300 return status;
3301 }
3302
3303 /* If inheritable_components == false,
3304 se_create_child_secdesc()
3305 creates a security desriptor with a NULL dacl
3306 entry, but with SEC_DESC_DACL_PRESENT. We need
3307 to remove that flag. */
3308
3309 if (!inheritable_components) {
3310 security_info_sent &= ~SECINFO_DACL;
3311 psd->type &= ~SEC_DESC_DACL_PRESENT;
3312 }
3313
3314 if (DEBUGLEVEL >= 10) {
3315 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3316 fsp_str_dbg(fsp) ));
3317 NDR_PRINT_DEBUG(security_descriptor, psd);
3318 }
3319
3320 if (inherit_owner) {
3321 /* We need to be root to force this. */
3322 become_root();
3323 }
3324 status = SMB_VFS_FSET_NT_ACL(fsp,
3325 security_info_sent,
3326 psd);
3327 if (inherit_owner) {
3328 unbecome_root();
3329 }
3330 return status;
3331 }
3332
3333 /*
3334 * Wrapper around open_file_ntcreate and open_directory
3335 */
3336
3337 static NTSTATUS create_file_unixpath(connection_struct *conn,
3338 struct smb_request *req,
3339 struct smb_filename *smb_fname,
3340 uint32_t access_mask,
3341 uint32_t share_access,
3342 uint32_t create_disposition,
3343 uint32_t create_options,
3344 uint32_t file_attributes,
3345 uint32_t oplock_request,
3346 uint64_t allocation_size,
3347 uint32_t private_flags,
3348 struct security_descriptor *sd,
3349 struct ea_list *ea_list,
3350
3351 files_struct **result,
3352 int *pinfo)
3353 {
3354 int info = FILE_WAS_OPENED;
3355 files_struct *base_fsp = NULL;
3356 files_struct *fsp = NULL;
3357 NTSTATUS status;
3358
3359 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3360 "file_attributes = 0x%x, share_access = 0x%x, "
3361 "create_disposition = 0x%x create_options = 0x%x "
3362 "oplock_request = 0x%x private_flags = 0x%x "
3363 "ea_list = 0x%p, sd = 0x%p, "
3364 "fname = %s\n",
3365 (unsigned int)access_mask,
3366 (unsigned int)file_attributes,
3367 (unsigned int)share_access,
3368 (unsigned int)create_disposition,
3369 (unsigned int)create_options,
3370 (unsigned int)oplock_request,
3371 (unsigned int)private_flags,
3372 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3373
3374 if (create_options & FILE_OPEN_BY_FILE_ID) {
3375 status = NT_STATUS_NOT_SUPPORTED;
3376 goto fail;
3377 }
3378
3379 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3380 status = NT_STATUS_INVALID_PARAMETER;
3381 goto fail;
3382 }
3383
3384 if (req == NULL) {
3385 oplock_request |= INTERNAL_OPEN_ONLY;
3386 }
3387
3388 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3389 && (access_mask & DELETE_ACCESS)
3390 && !is_ntfs_stream_smb_fname(smb_fname)) {
3391 /*
3392 * We can't open a file with DELETE access if any of the
3393 * streams is open without FILE_SHARE_DELETE
3394 */
3395 status = open_streams_for_delete(conn, smb_fname->base_name);
3396
3397 if (!NT_STATUS_IS_OK(status)) {
3398 goto fail;
3399 }
3400 }
3401
3402 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3403 !security_token_has_privilege(get_current_nttok(conn),
3404 SEC_PRIV_SECURITY)) {
3405 DEBUG(10, ("create_file_unixpath: open on %s "
3406 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3407 smb_fname_str_dbg(smb_fname)));
3408 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3409 goto fail;
3410 }
3411
3412 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3413 && is_ntfs_stream_smb_fname(smb_fname)
3414 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3415 uint32 base_create_disposition;
3416 struct smb_filename *smb_fname_base = NULL;
3417
3418 if (create_options & FILE_DIRECTORY_FILE) {
3419 status = NT_STATUS_NOT_A_DIRECTORY;
3420 goto fail;
3421 }
3422
3423 switch (create_disposition) {
3424 case FILE_OPEN:
3425 base_create_disposition = FILE_OPEN;
3426 break;
3427 default:
3428 base_create_disposition = FILE_OPEN_IF;
3429 break;
3430 }
3431
3432 /* Create an smb_filename with stream_name == NULL. */
3433 status = create_synthetic_smb_fname(talloc_tos(),
3434 smb_fname->base_name,
3435 NULL, NULL,
3436 &smb_fname_base);
3437 if (!NT_STATUS_IS_OK(status)) {
3438 goto fail;
3439 }
3440
3441 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3442 DEBUG(10, ("Unable to stat stream: %s\n",
3443 smb_fname_str_dbg(smb_fname_base)));
3444 }
3445
3446 /* Open the base file. */
3447 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3448 FILE_SHARE_READ
3449 | FILE_SHARE_WRITE
3450 | FILE_SHARE_DELETE,
3451 base_create_disposition,
3452 0, 0, 0, 0, 0, NULL, NULL,
3453 &base_fsp, NULL);
3454 TALLOC_FREE(smb_fname_base);
3455
3456 if (!NT_STATUS_IS_OK(status)) {
3457 DEBUG(10, ("create_file_unixpath for base %s failed: "
3458 "%s\n", smb_fname->base_name,
3459 nt_errstr(status)));
3460 goto fail;
3461 }
3462 /* we don't need to low level fd */
3463 fd_close(base_fsp);
3464 }
3465
3466 /*
3467 * If it's a request for a directory open, deal with it separately.
3468 */
3469
3470 if (create_options & FILE_DIRECTORY_FILE) {
3471
3472 if (create_options & FILE_NON_DIRECTORY_FILE) {
3473 status = NT_STATUS_INVALID_PARAMETER;
3474 goto fail;
3475 }
3476
3477 /* Can't open a temp directory. IFS kit test. */
3478 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3479 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3480 status = NT_STATUS_INVALID_PARAMETER;
3481 goto fail;
3482 }
3483
3484 /*
3485 * We will get a create directory here if the Win32
3486 * app specified a security descriptor in the
3487 * CreateDirectory() call.
3488 */
3489
3490 oplock_request = 0;
3491 status = open_directory(
3492 conn, req, smb_fname, access_mask, share_access,
3493 create_disposition, create_options, file_attributes,
3494 &info, &fsp);
3495 } else {
3496
3497 /*
3498 * Ordinary file case.
3499 */
3500
3501 status = file_new(req, conn, &fsp);
3502 if(!NT_STATUS_IS_OK(status)) {
3503 goto fail;
3504 }
3505
3506 status = fsp_set_smb_fname(fsp, smb_fname);
3507 if (!NT_STATUS_IS_OK(status)) {
3508 goto fail;
3509 }
3510
3511 /*
3512 * We're opening the stream element of a base_fsp
3513 * we already opened. Set up the base_fsp pointer.
3514 */
3515 if (base_fsp) {
3516 fsp->base_fsp = base_fsp;
3517 }
3518
3519 status = open_file_ntcreate(conn,
3520 req,
3521 access_mask,
3522 share_access,
3523 create_disposition,
3524 create_options,
3525 file_attributes,
3526 oplock_request,
3527 private_flags,
3528 &info,
3529 fsp);
3530
3531 if(!NT_STATUS_IS_OK(status)) {
3532 file_free(req, fsp);
3533 fsp = NULL;
3534 }
3535
3536 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3537
3538 /* A stream open never opens a directory */
3539
3540 if (base_fsp) {
3541 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3542 goto fail;
3543 }
3544
3545 /*
3546 * Fail the open if it was explicitly a non-directory
3547 * file.
3548 */
3549
3550 if (create_options & FILE_NON_DIRECTORY_FILE) {
3551 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3552 goto fail;
3553 }
3554
3555 oplock_request = 0;
3556 status = open_directory(
3557 conn, req, smb_fname, access_mask,
3558 share_access, create_disposition,
3559 create_options, file_attributes,
3560 &info, &fsp);
3561 }
3562 }
3563
3564 if (!NT_STATUS_IS_OK(status)) {
3565 goto fail;
3566 }
3567
3568 fsp->base_fsp = base_fsp;
3569
3570 if ((ea_list != NULL) &&
3571 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3572 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3573 if (!NT_STATUS_IS_OK(status)) {
3574 goto fail;
3575 }
3576 }
3577
3578 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3579 status = NT_STATUS_ACCESS_DENIED;
3580 goto fail;
3581 }
3582
3583 /* Save the requested allocation size. */
3584 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3585 if (allocation_size
3586 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3587 fsp->initial_allocation_size = smb_roundup(
3588 fsp->conn, allocation_size);
3589 if (fsp->is_directory) {
3590 /* Can't set allocation size on a directory. */
3591 status = NT_STATUS_ACCESS_DENIED;
3592 goto fail;
3593 }
3594 if (vfs_allocate_file_space(
3595 fsp, fsp->initial_allocation_size) == -1) {
3596 status = NT_STATUS_DISK_FULL;
3597 goto fail;
3598 }
3599 } else {
3600 fsp->initial_allocation_size = smb_roundup(
3601 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3602 }
3603 }
3604
3605 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3606 fsp->base_fsp == NULL) {
3607 if (sd != NULL) {
3608 /*
3609 * According to the MS documentation, the only time the security
3610 * descriptor is applied to the opened file is iff we *created* the
3611 * file; an existing file stays the same.
3612 *
3613 * Also, it seems (from observation) that you can open the file with
3614 * any access mask but you can still write the sd. We need to override
3615 * the granted access before we call set_sd
3616 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3617 */
3618
3619 uint32_t sec_info_sent;
3620 uint32_t saved_access_mask = fsp->access_mask;
3621
3622 sec_info_sent = get_sec_info(sd);
3623
3624 fsp->access_mask = FILE_GENERIC_ALL;
3625
3626 /* Convert all the generic bits. */
3627 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3628 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3629
3630 if (sec_info_sent & (SECINFO_OWNER|
3631 SECINFO_GROUP|
3632 SECINFO_DACL|
3633 SECINFO_SACL)) {
3634 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3635 }
3636
3637 fsp->access_mask = saved_access_mask;
3638
3639 if (!NT_STATUS_IS_OK(status)) {
3640 goto fail;
3641 }
3642 } else if (lp_inherit_acls(SNUM(conn))) {
3643 /* Inherit from parent. Errors here are not fatal. */
3644 status = inherit_new_acl(fsp);
3645 if (!NT_STATUS_IS_OK(status)) {
3646 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3647 fsp_str_dbg(fsp),
3648 nt_errstr(status) ));
3649 }
3650 }
3651 }
3652
3653 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3654
3655 *result = fsp;
3656 if (pinfo != NULL) {
3657 *pinfo = info;
3658 }
3659
3660 smb_fname->st = fsp->fsp_name->st;
3661
3662 return NT_STATUS_OK;
3663
3664 fail:
3665 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3666
3667 if (fsp != NULL) {
3668 if (base_fsp && fsp->base_fsp == base_fsp) {
3669 /*
3670 * The close_file below will close
3671 * fsp->base_fsp.
3672 */
3673 base_fsp = NULL;
3674 }
3675 close_file(req, fsp, ERROR_CLOSE);
3676 fsp = NULL;
3677 }
3678 if (base_fsp != NULL) {
3679 close_file(req, base_fsp, ERROR_CLOSE);
3680 base_fsp = NULL;
3681 }
3682 return status;
3683 }
3684
3685 /*
3686 * Calculate the full path name given a relative fid.
3687 */
3688 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3689 struct smb_request *req,
3690 uint16_t root_dir_fid,
3691 const struct smb_filename *smb_fname,
3692 struct smb_filename **smb_fname_out)
3693 {
3694 files_struct *dir_fsp;
3695 char *parent_fname = NULL;
3696 char *new_base_name = NULL;
3697 NTSTATUS status;
3698
3699 if (root_dir_fid == 0 || !smb_fname) {
3700 status = NT_STATUS_INTERNAL_ERROR;
3701 goto out;
3702 }
3703
3704 dir_fsp = file_fsp(req, root_dir_fid);
3705
3706 if (dir_fsp == NULL) {
3707 status = NT_STATUS_INVALID_HANDLE;
3708 goto out;
3709 }
3710
3711 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3712 status = NT_STATUS_INVALID_HANDLE;
3713 goto out;
3714 }
3715
3716 if (!dir_fsp->is_directory) {
3717
3718 /*
3719 * Check to see if this is a mac fork of some kind.
3720 */
3721
3722 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3723 is_ntfs_stream_smb_fname(smb_fname)) {
3724 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3725 goto out;
3726 }
3727
3728 /*
3729 we need to handle the case when we get a
3730 relative open relative to a file and the
3731 pathname is blank - this is a reopen!
3732 (hint from demyn plantenberg)
3733 */
3734
3735 status = NT_STATUS_INVALID_HANDLE;
3736 goto out;
3737 }
3738
3739 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3740 /*
3741 * We're at the toplevel dir, the final file name
3742 * must not contain ./, as this is filtered out
3743 * normally by srvstr_get_path and unix_convert
3744 * explicitly rejects paths containing ./.
3745 */
3746 parent_fname = talloc_strdup(talloc_tos(), "");
3747 if (parent_fname == NULL) {
3748 status = NT_STATUS_NO_MEMORY;
3749 goto out;
3750 }
3751 } else {
3752 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3753
3754 /*
3755 * Copy in the base directory name.
3756 */
3757
3758 parent_fname = talloc_array(talloc_tos(), char,
3759 dir_name_len+2);
3760 if (parent_fname == NULL) {
3761 status = NT_STATUS_NO_MEMORY;
3762 goto out;
3763 }
3764 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3765 dir_name_len+1);
3766
3767 /*
3768 * Ensure it ends in a '/'.
3769 * We used TALLOC_SIZE +2 to add space for the '/'.
3770 */
3771
3772 if(dir_name_len
3773 && (parent_fname[dir_name_len-1] != '\\')
3774 && (parent_fname[dir_name_len-1] != '/')) {
3775 parent_fname[dir_name_len] = '/';
3776 parent_fname[dir_name_len+1] = '\0';
3777 }
3778 }
3779
3780 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3781 smb_fname->base_name);
3782 if (new_base_name == NULL) {
3783 status = NT_STATUS_NO_MEMORY;
3784 goto out;
3785 }
3786
3787 status = filename_convert(req,
3788 conn,
3789 req->flags2 & FLAGS2_DFS_PATHNAMES,
3790 new_base_name,
3791 0,
3792 NULL,
3793 smb_fname_out);
3794 if (!NT_STATUS_IS_OK(status)) {
3795 goto out;
3796 }
3797
3798 out:
3799 TALLOC_FREE(parent_fname);
3800 TALLOC_FREE(new_base_name);
3801 return status;
3802 }
3803
3804 NTSTATUS create_file_default(connection_struct *conn,
3805 struct smb_request *req,
3806 uint16_t root_dir_fid,
3807 struct smb_filename *smb_fname,
3808 uint32_t access_mask,
3809 uint32_t share_access,
3810 uint32_t create_disposition,
3811 uint32_t create_options,
3812 uint32_t file_attributes,
3813 uint32_t oplock_request,
3814 uint64_t allocation_size,
3815 uint32_t private_flags,
3816 struct security_descriptor *sd,
3817 struct ea_list *ea_list,
3818 files_struct **result,
3819 int *pinfo)
3820 {
3821 int info = FILE_WAS_OPENED;
3822 files_struct *fsp = NULL;
3823 NTSTATUS status;
3824 bool stream_name = false;
3825
3826 DEBUG(10,("create_file: access_mask = 0x%x "
3827 "file_attributes = 0x%x, share_access = 0x%x, "
3828 "create_disposition = 0x%x create_options = 0x%x "
3829 "oplock_request = 0x%x "
3830 "private_flags = 0x%x "
3831 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3832 "fname = %s\n",
3833 (unsigned int)access_mask,
3834 (unsigned int)file_attributes,
3835 (unsigned int)share_access,
3836 (unsigned int)create_disposition,
3837 (unsigned int)create_options,
3838 (unsigned int)oplock_request,
3839 (unsigned int)private_flags,
3840 (unsigned int)root_dir_fid,
3841 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3842
3843 /*
3844 * Calculate the filename from the root_dir_if if necessary.
3845 */
3846
3847 if (root_dir_fid != 0) {
3848 struct smb_filename *smb_fname_out = NULL;
3849 status = get_relative_fid_filename(conn, req, root_dir_fid,
3850 smb_fname, &smb_fname_out);
3851 if (!NT_STATUS_IS_OK(status)) {
3852 goto fail;
3853 }
3854 smb_fname = smb_fname_out;
3855 }
3856
3857 /*
3858 * Check to see if this is a mac fork of some kind.
3859 */
3860
3861 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3862 if (stream_name) {
3863 enum FAKE_FILE_TYPE fake_file_type;
3864
3865 fake_file_type = is_fake_file(smb_fname);
3866
3867 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3868
3869 /*
3870 * Here we go! support for changing the disk quotas
3871 * --metze
3872 *
3873 * We need to fake up to open this MAGIC QUOTA file
3874 * and return a valid FID.
3875 *
3876 * w2k close this file directly after openening xp
3877 * also tries a QUERY_FILE_INFO on the file and then
3878 * close it
3879 */
3880 status = open_fake_file(req, conn, req->vuid,
3881 fake_file_type, smb_fname,
3882 access_mask, &fsp);
3883 if (!NT_STATUS_IS_OK(status)) {
3884 goto fail;
3885 }
3886
3887 ZERO_STRUCT(smb_fname->st);
3888 goto done;
3889 }
3890
3891 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3892 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3893 goto fail;
3894 }
3895 }
3896
3897 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
3898 int ret;
3899 smb_fname->stream_name = NULL;
3900 /* We have to handle this error here. */
3901 if (create_options & FILE_DIRECTORY_FILE) {
3902 status = NT_STATUS_NOT_A_DIRECTORY;
3903 goto fail;
3904 }
3905 if (lp_posix_pathnames()) {
3906 ret = SMB_VFS_LSTAT(conn, smb_fname);
3907 } else {
3908 ret = SMB_VFS_STAT(conn, smb_fname);
3909 }
3910
3911 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3912 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3913 goto fail;
3914 }
3915 }
3916
3917 status = create_file_unixpath(
3918 conn, req, smb_fname, access_mask, share_access,
3919 create_disposition, create_options, file_attributes,
3920 oplock_request, allocation_size, private_flags,
3921 sd, ea_list,
3922 &fsp, &info);
3923
3924 if (!NT_STATUS_IS_OK(status)) {
3925 goto fail;
3926 }
3927
3928 done:
3929 DEBUG(10, ("create_file: info=%d\n", info));
3930
3931 *result = fsp;
3932 if (pinfo != NULL) {
3933 *pinfo = info;
3934 }
3935 return NT_STATUS_OK;
3936
3937 fail:
3938 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3939
3940 if (fsp != NULL) {
3941 close_file(req, fsp, ERROR_CLOSE);
3942 fsp = NULL;
3943 }
3944 return status;
3945 }
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