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Allow for async opens.
[Samba/gebeck_regimport.git] / source3 / smbd / open.c
blob467a69f0492eeaf12fc0dba6acfb3fdc310ec0c1
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 Reschedule an open call that went asynchronous.
1546 ****************************************************************************/
1547
1548 static void schedule_async_open(struct timeval request_time,
1549 struct smb_request *req)
1550 {
1551 struct deferred_open_record state;
1552 struct timeval timeout;
1553
1554 timeout = timeval_set(20, 0);
1555
1556 ZERO_STRUCT(state);
1557 state.delayed_for_oplocks = false;
1558 state.async_open = true;
1559
1560 if (!request_timed_out(request_time, timeout)) {
1561 defer_open(NULL, request_time, timeout, req, &state);
1562 }
1563 }
1564
1565 /****************************************************************************
1566 Work out what access_mask to use from what the client sent us.
1567 ****************************************************************************/
1568
1569 static NTSTATUS smbd_calculate_maximum_allowed_access(
1570 connection_struct *conn,
1571 const struct smb_filename *smb_fname,
1572 uint32_t *p_access_mask)
1573 {
1574 struct security_descriptor *sd;
1575 uint32_t access_granted;
1576 NTSTATUS status;
1577
1578 if (get_current_uid(conn) == (uid_t)0) {
1579 *p_access_mask |= FILE_GENERIC_ALL;
1580 return NT_STATUS_OK;
1581 }
1582
1583 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1584 (SECINFO_OWNER |
1585 SECINFO_GROUP |
1586 SECINFO_DACL),&sd);
1587
1588 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1589 /*
1590 * File did not exist
1591 */
1592 *p_access_mask = FILE_GENERIC_ALL;
1593 return NT_STATUS_OK;
1594 }
1595 if (!NT_STATUS_IS_OK(status)) {
1596 DEBUG(10,("smbd_calculate_access_mask: "
1597 "Could not get acl on file %s: %s\n",
1598 smb_fname_str_dbg(smb_fname),
1599 nt_errstr(status)));
1600 return NT_STATUS_ACCESS_DENIED;
1601 }
1602
1603 /*
1604 * Never test FILE_READ_ATTRIBUTES. se_access_check()
1605 * also takes care of owner WRITE_DAC and READ_CONTROL.
1606 */
1607 status = se_access_check(sd,
1608 get_current_nttok(conn),
1609 (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1610 &access_granted);
1611
1612 TALLOC_FREE(sd);
1613
1614 if (!NT_STATUS_IS_OK(status)) {
1615 DEBUG(10, ("smbd_calculate_access_mask: "
1616 "Access denied on file %s: "
1617 "when calculating maximum access\n",
1618 smb_fname_str_dbg(smb_fname)));
1619 return NT_STATUS_ACCESS_DENIED;
1620 }
1621 *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1622 return NT_STATUS_OK;
1623 }
1624
1625 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1626 const struct smb_filename *smb_fname,
1627 uint32_t access_mask,
1628 uint32_t *access_mask_out)
1629 {
1630 NTSTATUS status;
1631 uint32_t orig_access_mask = access_mask;
1632 uint32_t rejected_share_access;
1633
1634 /*
1635 * Convert GENERIC bits to specific bits.
1636 */
1637
1638 se_map_generic(&access_mask, &file_generic_mapping);
1639
1640 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1641 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1642
1643 status = smbd_calculate_maximum_allowed_access(
1644 conn, smb_fname, &access_mask);
1645
1646 if (!NT_STATUS_IS_OK(status)) {
1647 return status;
1648 }
1649
1650 access_mask &= conn->share_access;
1651 }
1652
1653 rejected_share_access = access_mask & ~(conn->share_access);
1654
1655 if (rejected_share_access) {
1656 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1657 "file %s: rejected by share access mask[0x%08X] "
1658 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1659 smb_fname_str_dbg(smb_fname),
1660 conn->share_access,
1661 orig_access_mask, access_mask,
1662 rejected_share_access));
1663 return NT_STATUS_ACCESS_DENIED;
1664 }
1665
1666 *access_mask_out = access_mask;
1667 return NT_STATUS_OK;
1668 }
1669
1670 /****************************************************************************
1671 Remove the deferred open entry under lock.
1672 ****************************************************************************/
1673
1674 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1675 struct server_id pid)
1676 {
1677 struct share_mode_lock *lck = get_existing_share_mode_lock(
1678 talloc_tos(), id);
1679 if (lck == NULL) {
1680 DEBUG(0, ("could not get share mode lock\n"));
1681 return;
1682 }
1683 del_deferred_open_entry(lck, mid, pid);
1684 TALLOC_FREE(lck);
1685 }
1686
1687 /****************************************************************************
1688 Open a file with a share mode. Passed in an already created files_struct *.
1689 ****************************************************************************/
1690
1691 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1692 struct smb_request *req,
1693 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1694 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1695 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1696 uint32 create_options, /* options such as delete on close. */
1697 uint32 new_dos_attributes, /* attributes used for new file. */
1698 int oplock_request, /* internal Samba oplock codes. */
1699 /* Information (FILE_EXISTS etc.) */
1700 uint32_t private_flags, /* Samba specific flags. */
1701 int *pinfo,
1702 files_struct *fsp)
1703 {
1704 struct smb_filename *smb_fname = fsp->fsp_name;
1705 int flags=0;
1706 int flags2=0;
1707 bool file_existed = VALID_STAT(smb_fname->st);
1708 bool def_acl = False;
1709 bool posix_open = False;
1710 bool new_file_created = False;
1711 bool clear_ads = false;
1712 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1713 mode_t new_unx_mode = (mode_t)0;
1714 mode_t unx_mode = (mode_t)0;
1715 int info;
1716 uint32 existing_dos_attributes = 0;
1717 struct timeval request_time = timeval_zero();
1718 struct share_mode_lock *lck = NULL;
1719 uint32 open_access_mask = access_mask;
1720 NTSTATUS status;
1721 char *parent_dir;
1722
1723 if (conn->printer) {
1724 /*
1725 * Printers are handled completely differently.
1726 * Most of the passed parameters are ignored.
1727 */
1728
1729 if (pinfo) {
1730 *pinfo = FILE_WAS_CREATED;
1731 }
1732
1733 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1734 smb_fname_str_dbg(smb_fname)));
1735
1736 if (!req) {
1737 DEBUG(0,("open_file_ntcreate: printer open without "
1738 "an SMB request!\n"));
1739 return NT_STATUS_INTERNAL_ERROR;
1740 }
1741
1742 return print_spool_open(fsp, smb_fname->base_name,
1743 req->vuid);
1744 }
1745
1746 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1747 NULL)) {
1748 return NT_STATUS_NO_MEMORY;
1749 }
1750
1751 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1752 posix_open = True;
1753 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1754 new_dos_attributes = 0;
1755 } else {
1756 /* Windows allows a new file to be created and
1757 silently removes a FILE_ATTRIBUTE_DIRECTORY
1758 sent by the client. Do the same. */
1759
1760 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1761
1762 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1763 * created new. */
1764 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1765 smb_fname, parent_dir);
1766 }
1767
1768 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1769 "access_mask=0x%x share_access=0x%x "
1770 "create_disposition = 0x%x create_options=0x%x "
1771 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1772 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1773 access_mask, share_access, create_disposition,
1774 create_options, (unsigned int)unx_mode, oplock_request,
1775 (unsigned int)private_flags));
1776
1777 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1778 DEBUG(0, ("No smb request but not an internal only open!\n"));
1779 return NT_STATUS_INTERNAL_ERROR;
1780 }
1781
1782 /*
1783 * Only non-internal opens can be deferred at all
1784 */
1785
1786 if (req) {
1787 void *ptr;
1788 if (get_deferred_open_message_state(req,
1789 &request_time,
1790 &ptr)) {
1791
1792 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1793 /* Remember the absolute time of the original
1794 request with this mid. We'll use it later to
1795 see if this has timed out. */
1796
1797 /* If it was an async create retry, the file
1798 didn't exist. */
1799 if (state->async_open) {
1800 SET_STAT_INVALID(smb_fname->st);
1801 file_existed = false;
1802 } else {
1803 /* Remove the deferred open entry under lock. */
1804 remove_deferred_open_entry(
1805 state->id, req->mid,
1806 messaging_server_id(req->sconn->msg_ctx));
1807 }
1808
1809 /* Ensure we don't reprocess this message. */
1810 remove_deferred_open_message_smb(req->sconn, req->mid);
1811 }
1812 }
1813
1814 if (!posix_open) {
1815 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1816 if (file_existed) {
1817 existing_dos_attributes = dos_mode(conn, smb_fname);
1818 }
1819 }
1820
1821 /* ignore any oplock requests if oplocks are disabled */
1822 if (!lp_oplocks(SNUM(conn)) ||
1823 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1824 /* Mask off everything except the private Samba bits. */
1825 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1826 }
1827
1828 /* this is for OS/2 long file names - say we don't support them */
1829 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1830 /* OS/2 Workplace shell fix may be main code stream in a later
1831 * release. */
1832 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1833 "supported.\n"));
1834 if (use_nt_status()) {
1835 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1836 }
1837 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1838 }
1839
1840 switch( create_disposition ) {
1841 /*
1842 * Currently we're using FILE_SUPERSEDE as the same as
1843 * FILE_OVERWRITE_IF but they really are
1844 * different. FILE_SUPERSEDE deletes an existing file
1845 * (requiring delete access) then recreates it.
1846 */
1847 case FILE_SUPERSEDE:
1848 /* If file exists replace/overwrite. If file doesn't
1849 * exist create. */
1850 flags2 |= (O_CREAT | O_TRUNC);
1851 clear_ads = true;
1852 break;
1853
1854 case FILE_OVERWRITE_IF:
1855 /* If file exists replace/overwrite. If file doesn't
1856 * exist create. */
1857 flags2 |= (O_CREAT | O_TRUNC);
1858 clear_ads = true;
1859 break;
1860
1861 case FILE_OPEN:
1862 /* If file exists open. If file doesn't exist error. */
1863 if (!file_existed) {
1864 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1865 "requested for file %s and file "
1866 "doesn't exist.\n",
1867 smb_fname_str_dbg(smb_fname)));
1868 errno = ENOENT;
1869 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1870 }
1871 break;
1872
1873 case FILE_OVERWRITE:
1874 /* If file exists overwrite. If file doesn't exist
1875 * error. */
1876 if (!file_existed) {
1877 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1878 "requested for file %s and file "
1879 "doesn't exist.\n",
1880 smb_fname_str_dbg(smb_fname) ));
1881 errno = ENOENT;
1882 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1883 }
1884 flags2 |= O_TRUNC;
1885 clear_ads = true;
1886 break;
1887
1888 case FILE_CREATE:
1889 /* If file exists error. If file doesn't exist
1890 * create. */
1891 if (file_existed) {
1892 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1893 "requested for file %s and file "
1894 "already exists.\n",
1895 smb_fname_str_dbg(smb_fname)));
1896 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1897 errno = EISDIR;
1898 } else {
1899 errno = EEXIST;
1900 }
1901 return map_nt_error_from_unix(errno);
1902 }
1903 flags2 |= (O_CREAT|O_EXCL);
1904 break;
1905
1906 case FILE_OPEN_IF:
1907 /* If file exists open. If file doesn't exist
1908 * create. */
1909 flags2 |= O_CREAT;
1910 break;
1911
1912 default:
1913 return NT_STATUS_INVALID_PARAMETER;
1914 }
1915
1916 /* We only care about matching attributes on file exists and
1917 * overwrite. */
1918
1919 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1920 (create_disposition == FILE_OVERWRITE_IF))) {
1921 if (!open_match_attributes(conn, existing_dos_attributes,
1922 new_dos_attributes,
1923 smb_fname->st.st_ex_mode,
1924 unx_mode, &new_unx_mode)) {
1925 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1926 "for file %s (%x %x) (0%o, 0%o)\n",
1927 smb_fname_str_dbg(smb_fname),
1928 existing_dos_attributes,
1929 new_dos_attributes,
1930 (unsigned int)smb_fname->st.st_ex_mode,
1931 (unsigned int)unx_mode ));
1932 errno = EACCES;
1933 return NT_STATUS_ACCESS_DENIED;
1934 }
1935 }
1936
1937 status = smbd_calculate_access_mask(conn, smb_fname,
1938 access_mask,
1939 &access_mask);
1940 if (!NT_STATUS_IS_OK(status)) {
1941 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1942 "on file %s returned %s\n",
1943 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1944 return status;
1945 }
1946
1947 open_access_mask = access_mask;
1948
1949 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1950 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1951 }
1952
1953 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1954 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1955 access_mask));
1956
1957 /*
1958 * Note that we ignore the append flag as append does not
1959 * mean the same thing under DOS and Unix.
1960 */
1961
1962 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1963 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1964 /* DENY_DOS opens are always underlying read-write on the
1965 file handle, no matter what the requested access mask
1966 says. */
1967 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1968 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1969 flags = O_RDWR;
1970 } else {
1971 flags = O_WRONLY;
1972 }
1973 } else {
1974 flags = O_RDONLY;
1975 }
1976
1977 /*
1978 * Currently we only look at FILE_WRITE_THROUGH for create options.
1979 */
1980
1981 #if defined(O_SYNC)
1982 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1983 flags2 |= O_SYNC;
1984 }
1985 #endif /* O_SYNC */
1986
1987 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1988 flags2 |= O_APPEND;
1989 }
1990
1991 if (!posix_open && !CAN_WRITE(conn)) {
1992 /*
1993 * We should really return a permission denied error if either
1994 * O_CREAT or O_TRUNC are set, but for compatibility with
1995 * older versions of Samba we just AND them out.
1996 */
1997 flags2 &= ~(O_CREAT|O_TRUNC);
1998 }
1999
2000 /*
2001 * Ensure we can't write on a read-only share or file.
2002 */
2003
2004 if (flags != O_RDONLY && file_existed &&
2005 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
2006 DEBUG(5,("open_file_ntcreate: write access requested for "
2007 "file %s on read only %s\n",
2008 smb_fname_str_dbg(smb_fname),
2009 !CAN_WRITE(conn) ? "share" : "file" ));
2010 errno = EACCES;
2011 return NT_STATUS_ACCESS_DENIED;
2012 }
2013
2014 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2015 fsp->share_access = share_access;
2016 fsp->fh->private_options = private_flags;
2017 fsp->access_mask = open_access_mask; /* We change this to the
2018 * requested access_mask after
2019 * the open is done. */
2020 fsp->posix_open = posix_open;
2021
2022 /* Ensure no SAMBA_PRIVATE bits can be set. */
2023 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
2024
2025 if (timeval_is_zero(&request_time)) {
2026 request_time = fsp->open_time;
2027 }
2028
2029 if (file_existed) {
2030 struct share_mode_entry *batch_entry = NULL;
2031 struct share_mode_entry *exclusive_entry = NULL;
2032 bool got_level2_oplock = false;
2033 bool got_a_none_oplock = false;
2034 struct file_id id;
2035
2036 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2037 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2038
2039 lck = get_share_mode_lock(talloc_tos(), id,
2040 conn->connectpath,
2041 smb_fname, &old_write_time);
2042 if (lck == NULL) {
2043 DEBUG(0, ("Could not get share mode lock\n"));
2044 return NT_STATUS_SHARING_VIOLATION;
2045 }
2046
2047 /* Get the types we need to examine. */
2048 find_oplock_types(fsp,
2049 oplock_request,
2050 lck,
2051 &batch_entry,
2052 &exclusive_entry,
2053 &got_level2_oplock,
2054 &got_a_none_oplock);
2055
2056 /* First pass - send break only on batch oplocks. */
2057 if ((req != NULL) &&
2058 delay_for_batch_oplocks(fsp,
2059 req->mid,
2060 oplock_request,
2061 batch_entry)) {
2062 schedule_defer_open(lck, request_time, req);
2063 TALLOC_FREE(lck);
2064 return NT_STATUS_SHARING_VIOLATION;
2065 }
2066
2067 /* Use the client requested access mask here, not the one we
2068 * open with. */
2069 status = open_mode_check(conn, lck, fsp->name_hash,
2070 access_mask, share_access,
2071 create_options, &file_existed);
2072
2073 if (NT_STATUS_IS_OK(status)) {
2074 /* We might be going to allow this open. Check oplock
2075 * status again. */
2076 /* Second pass - send break for both batch or
2077 * exclusive oplocks. */
2078 if ((req != NULL) &&
2079 delay_for_exclusive_oplocks(
2080 fsp,
2081 req->mid,
2082 oplock_request,
2083 exclusive_entry)) {
2084 schedule_defer_open(lck, request_time, req);
2085 TALLOC_FREE(lck);
2086 return NT_STATUS_SHARING_VIOLATION;
2087 }
2088 }
2089
2090 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2091 /* DELETE_PENDING is not deferred for a second */
2092 TALLOC_FREE(lck);
2093 return status;
2094 }
2095
2096 grant_fsp_oplock_type(fsp,
2097 oplock_request,
2098 got_level2_oplock,
2099 got_a_none_oplock);
2100
2101 if (!NT_STATUS_IS_OK(status)) {
2102 uint32 can_access_mask;
2103 bool can_access = True;
2104
2105 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2106
2107 /* Check if this can be done with the deny_dos and fcb
2108 * calls. */
2109 if (private_flags &
2110 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2111 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2112 if (req == NULL) {
2113 DEBUG(0, ("DOS open without an SMB "
2114 "request!\n"));
2115 TALLOC_FREE(lck);
2116 return NT_STATUS_INTERNAL_ERROR;
2117 }
2118
2119 /* Use the client requested access mask here,
2120 * not the one we open with. */
2121 status = fcb_or_dos_open(req,
2122 conn,
2123 fsp,
2124 smb_fname,
2125 id,
2126 req->smbpid,
2127 req->vuid,
2128 access_mask,
2129 share_access,
2130 create_options);
2131
2132 if (NT_STATUS_IS_OK(status)) {
2133 TALLOC_FREE(lck);
2134 if (pinfo) {
2135 *pinfo = FILE_WAS_OPENED;
2136 }
2137 return NT_STATUS_OK;
2138 }
2139 }
2140
2141 /*
2142 * This next line is a subtlety we need for
2143 * MS-Access. If a file open will fail due to share
2144 * permissions and also for security (access) reasons,
2145 * we need to return the access failed error, not the
2146 * share error. We can't open the file due to kernel
2147 * oplock deadlock (it's possible we failed above on
2148 * the open_mode_check()) so use a userspace check.
2149 */
2150
2151 if (flags & O_RDWR) {
2152 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2153 } else if (flags & O_WRONLY) {
2154 can_access_mask = FILE_WRITE_DATA;
2155 } else {
2156 can_access_mask = FILE_READ_DATA;
2157 }
2158
2159 if (((can_access_mask & FILE_WRITE_DATA) &&
2160 !CAN_WRITE(conn)) ||
2161 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2162 smb_fname, can_access_mask))) {
2163 can_access = False;
2164 }
2165
2166 /*
2167 * If we're returning a share violation, ensure we
2168 * cope with the braindead 1 second delay.
2169 */
2170
2171 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2172 lp_defer_sharing_violations()) {
2173 struct timeval timeout;
2174 struct deferred_open_record state;
2175 int timeout_usecs;
2176
2177 /* this is a hack to speed up torture tests
2178 in 'make test' */
2179 timeout_usecs = lp_parm_int(SNUM(conn),
2180 "smbd","sharedelay",
2181 SHARING_VIOLATION_USEC_WAIT);
2182
2183 /* This is a relative time, added to the absolute
2184 request_time value to get the absolute timeout time.
2185 Note that if this is the second or greater time we enter
2186 this codepath for this particular request mid then
2187 request_time is left as the absolute time of the *first*
2188 time this request mid was processed. This is what allows
2189 the request to eventually time out. */
2190
2191 timeout = timeval_set(0, timeout_usecs);
2192
2193 /* Nothing actually uses state.delayed_for_oplocks
2194 but it's handy to differentiate in debug messages
2195 between a 30 second delay due to oplock break, and
2196 a 1 second delay for share mode conflicts. */
2197
2198 state.delayed_for_oplocks = False;
2199 state.async_open = false;
2200 state.id = id;
2201
2202 if ((req != NULL)
2203 && !request_timed_out(request_time,
2204 timeout)) {
2205 defer_open(lck, request_time, timeout,
2206 req, &state);
2207 }
2208 }
2209
2210 TALLOC_FREE(lck);
2211 if (can_access) {
2212 /*
2213 * We have detected a sharing violation here
2214 * so return the correct error code
2215 */
2216 status = NT_STATUS_SHARING_VIOLATION;
2217 } else {
2218 status = NT_STATUS_ACCESS_DENIED;
2219 }
2220 return status;
2221 }
2222
2223 /*
2224 * We exit this block with the share entry *locked*.....
2225 */
2226 }
2227
2228 SMB_ASSERT(!file_existed || (lck != NULL));
2229
2230 /*
2231 * Ensure we pay attention to default ACLs on directories if required.
2232 */
2233
2234 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2235 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2236 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2237 }
2238
2239 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2240 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2241 (unsigned int)flags, (unsigned int)flags2,
2242 (unsigned int)unx_mode, (unsigned int)access_mask,
2243 (unsigned int)open_access_mask));
2244
2245 /*
2246 * open_file strips any O_TRUNC flags itself.
2247 */
2248
2249 fsp_open = open_file(fsp, conn, req, parent_dir,
2250 flags|flags2, unx_mode, access_mask,
2251 open_access_mask);
2252
2253 if (!NT_STATUS_IS_OK(fsp_open)) {
2254 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_RETRY)) {
2255 schedule_async_open(request_time, req);
2256 }
2257 TALLOC_FREE(lck);
2258 return fsp_open;
2259 }
2260
2261 if (!file_existed) {
2262 struct share_mode_entry *batch_entry = NULL;
2263 struct share_mode_entry *exclusive_entry = NULL;
2264 bool got_level2_oplock = false;
2265 bool got_a_none_oplock = false;
2266 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2267 struct file_id id;
2268 /*
2269 * Deal with the race condition where two smbd's detect the
2270 * file doesn't exist and do the create at the same time. One
2271 * of them will win and set a share mode, the other (ie. this
2272 * one) should check if the requested share mode for this
2273 * create is allowed.
2274 */
2275
2276 /*
2277 * Now the file exists and fsp is successfully opened,
2278 * fsp->dev and fsp->inode are valid and should replace the
2279 * dev=0,inode=0 from a non existent file. Spotted by
2280 * Nadav Danieli <nadavd@exanet.com>. JRA.
2281 */
2282
2283 id = fsp->file_id;
2284
2285 lck = get_share_mode_lock(talloc_tos(), id,
2286 conn->connectpath,
2287 smb_fname, &old_write_time);
2288
2289 if (lck == NULL) {
2290 DEBUG(0, ("open_file_ntcreate: Could not get share "
2291 "mode lock for %s\n",
2292 smb_fname_str_dbg(smb_fname)));
2293 fd_close(fsp);
2294 return NT_STATUS_SHARING_VIOLATION;
2295 }
2296
2297 /* Get the types we need to examine. */
2298 find_oplock_types(fsp,
2299 oplock_request,
2300 lck,
2301 &batch_entry,
2302 &exclusive_entry,
2303 &got_level2_oplock,
2304 &got_a_none_oplock);
2305
2306 /* First pass - send break only on batch oplocks. */
2307 if ((req != NULL) &&
2308 delay_for_batch_oplocks(fsp,
2309 req->mid,
2310 oplock_request,
2311 batch_entry)) {
2312 schedule_defer_open(lck, request_time, req);
2313 TALLOC_FREE(lck);
2314 fd_close(fsp);
2315 return NT_STATUS_SHARING_VIOLATION;
2316 }
2317
2318 status = open_mode_check(conn, lck, fsp->name_hash,
2319 access_mask, share_access,
2320 create_options, &file_existed);
2321
2322 if (NT_STATUS_IS_OK(status)) {
2323 /* We might be going to allow this open. Check oplock
2324 * status again. */
2325 /* Second pass - send break for both batch or
2326 * exclusive oplocks. */
2327 if ((req != NULL) &&
2328 delay_for_exclusive_oplocks(
2329 fsp,
2330 req->mid,
2331 oplock_request,
2332 exclusive_entry)) {
2333 schedule_defer_open(lck, request_time, req);
2334 TALLOC_FREE(lck);
2335 fd_close(fsp);
2336 return NT_STATUS_SHARING_VIOLATION;
2337 }
2338 }
2339
2340 if (!NT_STATUS_IS_OK(status)) {
2341 struct deferred_open_record state;
2342
2343 state.delayed_for_oplocks = False;
2344 state.async_open = false;
2345 state.id = id;
2346
2347 /* Do it all over again immediately. In the second
2348 * round we will find that the file existed and handle
2349 * the DELETE_PENDING and FCB cases correctly. No need
2350 * to duplicate the code here. Essentially this is a
2351 * "goto top of this function", but don't tell
2352 * anybody... */
2353
2354 if (req != NULL) {
2355 defer_open(lck, request_time, timeval_zero(),
2356 req, &state);
2357 }
2358 TALLOC_FREE(lck);
2359 fd_close(fsp);
2360 return status;
2361 }
2362
2363 grant_fsp_oplock_type(fsp,
2364 oplock_request,
2365 got_level2_oplock,
2366 got_a_none_oplock);
2367
2368 /*
2369 * We exit this block with the share entry *locked*.....
2370 */
2371
2372 }
2373
2374 SMB_ASSERT(lck != NULL);
2375
2376 /* Delete streams if create_disposition requires it */
2377 if (file_existed && clear_ads &&
2378 !is_ntfs_stream_smb_fname(smb_fname)) {
2379 status = delete_all_streams(conn, smb_fname->base_name);
2380 if (!NT_STATUS_IS_OK(status)) {
2381 TALLOC_FREE(lck);
2382 fd_close(fsp);
2383 return status;
2384 }
2385 }
2386
2387 /* note that we ignore failure for the following. It is
2388 basically a hack for NFS, and NFS will never set one of
2389 these only read them. Nobody but Samba can ever set a deny
2390 mode and we have already checked our more authoritative
2391 locking database for permission to set this deny mode. If
2392 the kernel refuses the operations then the kernel is wrong.
2393 note that GPFS supports it as well - jmcd */
2394
2395 if (fsp->fh->fd != -1) {
2396 int ret_flock;
2397 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2398 if(ret_flock == -1 ){
2399
2400 TALLOC_FREE(lck);
2401 fd_close(fsp);
2402
2403 return NT_STATUS_SHARING_VIOLATION;
2404 }
2405 }
2406
2407 /*
2408 * At this point onwards, we can guarentee that the share entry
2409 * is locked, whether we created the file or not, and that the
2410 * deny mode is compatible with all current opens.
2411 */
2412
2413 /*
2414 * If requested, truncate the file.
2415 */
2416
2417 if (file_existed && (flags2&O_TRUNC)) {
2418 /*
2419 * We are modifying the file after open - update the stat
2420 * struct..
2421 */
2422 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2423 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2424 status = map_nt_error_from_unix(errno);
2425 TALLOC_FREE(lck);
2426 fd_close(fsp);
2427 return status;
2428 }
2429 }
2430
2431 /*
2432 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2433 * but we don't have to store this - just ignore it on access check.
2434 */
2435 if (conn->sconn->using_smb2) {
2436 /*
2437 * SMB2 doesn't return it (according to Microsoft tests).
2438 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2439 * File created with access = 0x7 (Read, Write, Delete)
2440 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2441 */
2442 fsp->access_mask = access_mask;
2443 } else {
2444 /* But SMB1 does. */
2445 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2446 }
2447
2448 if (file_existed) {
2449 /* stat opens on existing files don't get oplocks. */
2450 if (is_stat_open(open_access_mask)) {
2451 fsp->oplock_type = NO_OPLOCK;
2452 }
2453
2454 if (flags2 & O_TRUNC) {
2455 info = FILE_WAS_OVERWRITTEN;
2456 } else {
2457 info = FILE_WAS_OPENED;
2458 }
2459 } else {
2460 info = FILE_WAS_CREATED;
2461 }
2462
2463 if (pinfo) {
2464 *pinfo = info;
2465 }
2466
2467 /*
2468 * Setup the oplock info in both the shared memory and
2469 * file structs.
2470 */
2471
2472 status = set_file_oplock(fsp, fsp->oplock_type);
2473 if (!NT_STATUS_IS_OK(status)) {
2474 /*
2475 * Could not get the kernel oplock or there are byte-range
2476 * locks on the file.
2477 */
2478 fsp->oplock_type = NO_OPLOCK;
2479 }
2480
2481 set_share_mode(lck, fsp, get_current_uid(conn),
2482 req ? req->mid : 0,
2483 fsp->oplock_type);
2484
2485 /* Handle strange delete on close create semantics. */
2486 if (create_options & FILE_DELETE_ON_CLOSE) {
2487
2488 status = can_set_delete_on_close(fsp, new_dos_attributes);
2489
2490 if (!NT_STATUS_IS_OK(status)) {
2491 /* Remember to delete the mode we just added. */
2492 del_share_mode(lck, fsp);
2493 TALLOC_FREE(lck);
2494 fd_close(fsp);
2495 return status;
2496 }
2497 /* Note that here we set the *inital* delete on close flag,
2498 not the regular one. The magic gets handled in close. */
2499 fsp->initial_delete_on_close = True;
2500 }
2501
2502 if (info == FILE_WAS_OVERWRITTEN
2503 || info == FILE_WAS_CREATED
2504 || info == FILE_WAS_SUPERSEDED) {
2505 new_file_created = True;
2506 }
2507
2508 if (new_file_created) {
2509 /* Files should be initially set as archive */
2510 if (lp_map_archive(SNUM(conn)) ||
2511 lp_store_dos_attributes(SNUM(conn))) {
2512 if (!posix_open) {
2513 if (file_set_dosmode(conn, smb_fname,
2514 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2515 parent_dir, true) == 0) {
2516 unx_mode = smb_fname->st.st_ex_mode;
2517 }
2518 }
2519 }
2520 }
2521
2522 /* Determine sparse flag. */
2523 if (posix_open) {
2524 /* POSIX opens are sparse by default. */
2525 fsp->is_sparse = true;
2526 } else {
2527 fsp->is_sparse = (file_existed &&
2528 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2529 }
2530
2531 /*
2532 * Take care of inherited ACLs on created files - if default ACL not
2533 * selected.
2534 */
2535
2536 if (!posix_open && !file_existed && !def_acl) {
2537
2538 int saved_errno = errno; /* We might get ENOSYS in the next
2539 * call.. */
2540
2541 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2542 errno == ENOSYS) {
2543 errno = saved_errno; /* Ignore ENOSYS */
2544 }
2545
2546 } else if (new_unx_mode) {
2547
2548 int ret = -1;
2549
2550 /* Attributes need changing. File already existed. */
2551
2552 {
2553 int saved_errno = errno; /* We might get ENOSYS in the
2554 * next call.. */
2555 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2556
2557 if (ret == -1 && errno == ENOSYS) {
2558 errno = saved_errno; /* Ignore ENOSYS */
2559 } else {
2560 DEBUG(5, ("open_file_ntcreate: reset "
2561 "attributes of file %s to 0%o\n",
2562 smb_fname_str_dbg(smb_fname),
2563 (unsigned int)new_unx_mode));
2564 ret = 0; /* Don't do the fchmod below. */
2565 }
2566 }
2567
2568 if ((ret == -1) &&
2569 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2570 DEBUG(5, ("open_file_ntcreate: failed to reset "
2571 "attributes of file %s to 0%o\n",
2572 smb_fname_str_dbg(smb_fname),
2573 (unsigned int)new_unx_mode));
2574 }
2575
2576 /* If this is a successful open, we must remove any deferred open
2577 * records. */
2578 if (req != NULL) {
2579 del_deferred_open_entry(lck, req->mid,
2580 messaging_server_id(req->sconn->msg_ctx));
2581 }
2582 TALLOC_FREE(lck);
2583
2584 return NT_STATUS_OK;
2585 }
2586
2587
2588 /****************************************************************************
2589 Open a file for for write to ensure that we can fchmod it.
2590 ****************************************************************************/
2591
2592 NTSTATUS open_file_fchmod(connection_struct *conn,
2593 struct smb_filename *smb_fname,
2594 files_struct **result)
2595 {
2596 if (!VALID_STAT(smb_fname->st)) {
2597 return NT_STATUS_INVALID_PARAMETER;
2598 }
2599
2600 return SMB_VFS_CREATE_FILE(
2601 conn, /* conn */
2602 NULL, /* req */
2603 0, /* root_dir_fid */
2604 smb_fname, /* fname */
2605 FILE_WRITE_DATA, /* access_mask */
2606 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2607 FILE_SHARE_DELETE),
2608 FILE_OPEN, /* create_disposition*/
2609 0, /* create_options */
2610 0, /* file_attributes */
2611 INTERNAL_OPEN_ONLY, /* oplock_request */
2612 0, /* allocation_size */
2613 0, /* private_flags */
2614 NULL, /* sd */
2615 NULL, /* ea_list */
2616 result, /* result */
2617 NULL); /* pinfo */
2618 }
2619
2620 static NTSTATUS mkdir_internal(connection_struct *conn,
2621 struct smb_filename *smb_dname,
2622 uint32 file_attributes)
2623 {
2624 mode_t mode;
2625 char *parent_dir = NULL;
2626 NTSTATUS status;
2627 bool posix_open = false;
2628 bool need_re_stat = false;
2629 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2630
2631 if(access_mask & ~(conn->share_access)) {
2632 DEBUG(5,("mkdir_internal: failing share access "
2633 "%s\n", lp_servicename(SNUM(conn))));
2634 return NT_STATUS_ACCESS_DENIED;
2635 }
2636
2637 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2638 NULL)) {
2639 return NT_STATUS_NO_MEMORY;
2640 }
2641
2642 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2643 posix_open = true;
2644 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2645 } else {
2646 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2647 }
2648
2649 status = check_parent_access(conn,
2650 smb_dname,
2651 access_mask);
2652 if(!NT_STATUS_IS_OK(status)) {
2653 DEBUG(5,("mkdir_internal: check_parent_access "
2654 "on directory %s for path %s returned %s\n",
2655 parent_dir,
2656 smb_dname->base_name,
2657 nt_errstr(status) ));
2658 return status;
2659 }
2660
2661 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2662 return map_nt_error_from_unix(errno);
2663 }
2664
2665 /* Ensure we're checking for a symlink here.... */
2666 /* We don't want to get caught by a symlink racer. */
2667
2668 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2669 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2670 smb_fname_str_dbg(smb_dname), strerror(errno)));
2671 return map_nt_error_from_unix(errno);
2672 }
2673
2674 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2675 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2676 smb_fname_str_dbg(smb_dname)));
2677 return NT_STATUS_NOT_A_DIRECTORY;
2678 }
2679
2680 if (lp_store_dos_attributes(SNUM(conn))) {
2681 if (!posix_open) {
2682 file_set_dosmode(conn, smb_dname,
2683 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2684 parent_dir, true);
2685 }
2686 }
2687
2688 if (lp_inherit_perms(SNUM(conn))) {
2689 inherit_access_posix_acl(conn, parent_dir,
2690 smb_dname->base_name, mode);
2691 need_re_stat = true;
2692 }
2693
2694 if (!posix_open) {
2695 /*
2696 * Check if high bits should have been set,
2697 * then (if bits are missing): add them.
2698 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2699 * dir.
2700 */
2701 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2702 (mode & ~smb_dname->st.st_ex_mode)) {
2703 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2704 (smb_dname->st.st_ex_mode |
2705 (mode & ~smb_dname->st.st_ex_mode)));
2706 need_re_stat = true;
2707 }
2708 }
2709
2710 /* Change the owner if required. */
2711 if (lp_inherit_owner(SNUM(conn))) {
2712 change_dir_owner_to_parent(conn, parent_dir,
2713 smb_dname->base_name,
2714 &smb_dname->st);
2715 need_re_stat = true;
2716 }
2717
2718 if (need_re_stat) {
2719 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2720 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2721 smb_fname_str_dbg(smb_dname), strerror(errno)));
2722 return map_nt_error_from_unix(errno);
2723 }
2724 }
2725
2726 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2727 smb_dname->base_name);
2728
2729 return NT_STATUS_OK;
2730 }
2731
2732 /****************************************************************************
2733 Ensure we didn't get symlink raced on opening a directory.
2734 ****************************************************************************/
2735
2736 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2737 const SMB_STRUCT_STAT *sbuf2)
2738 {
2739 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2740 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2741 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2742 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2743 return false;
2744 }
2745 return true;
2746 }
2747
2748 /****************************************************************************
2749 Open a directory from an NT SMB call.
2750 ****************************************************************************/
2751
2752 static NTSTATUS open_directory(connection_struct *conn,
2753 struct smb_request *req,
2754 struct smb_filename *smb_dname,
2755 uint32 access_mask,
2756 uint32 share_access,
2757 uint32 create_disposition,
2758 uint32 create_options,
2759 uint32 file_attributes,
2760 int *pinfo,
2761 files_struct **result)
2762 {
2763 files_struct *fsp = NULL;
2764 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2765 struct share_mode_lock *lck = NULL;
2766 NTSTATUS status;
2767 struct timespec mtimespec;
2768 int info = 0;
2769
2770 if (is_ntfs_stream_smb_fname(smb_dname)) {
2771 DEBUG(2, ("open_directory: %s is a stream name!\n",
2772 smb_fname_str_dbg(smb_dname)));
2773 return NT_STATUS_NOT_A_DIRECTORY;
2774 }
2775
2776 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2777 /* Ensure we have a directory attribute. */
2778 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2779 }
2780
2781 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2782 "share_access = 0x%x create_options = 0x%x, "
2783 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2784 smb_fname_str_dbg(smb_dname),
2785 (unsigned int)access_mask,
2786 (unsigned int)share_access,
2787 (unsigned int)create_options,
2788 (unsigned int)create_disposition,
2789 (unsigned int)file_attributes));
2790
2791 status = smbd_calculate_access_mask(conn, smb_dname,
2792 access_mask, &access_mask);
2793 if (!NT_STATUS_IS_OK(status)) {
2794 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2795 "on file %s returned %s\n",
2796 smb_fname_str_dbg(smb_dname),
2797 nt_errstr(status)));
2798 return status;
2799 }
2800
2801 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2802 !security_token_has_privilege(get_current_nttok(conn),
2803 SEC_PRIV_SECURITY)) {
2804 DEBUG(10, ("open_directory: open on %s "
2805 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2806 smb_fname_str_dbg(smb_dname)));
2807 return NT_STATUS_PRIVILEGE_NOT_HELD;
2808 }
2809
2810 switch( create_disposition ) {
2811 case FILE_OPEN:
2812
2813 if (!dir_existed) {
2814 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2815 }
2816
2817 info = FILE_WAS_OPENED;
2818 break;
2819
2820 case FILE_CREATE:
2821
2822 /* If directory exists error. If directory doesn't
2823 * exist create. */
2824
2825 if (dir_existed) {
2826 status = NT_STATUS_OBJECT_NAME_COLLISION;
2827 DEBUG(2, ("open_directory: unable to create "
2828 "%s. Error was %s\n",
2829 smb_fname_str_dbg(smb_dname),
2830 nt_errstr(status)));
2831 return status;
2832 }
2833
2834 status = mkdir_internal(conn, smb_dname,
2835 file_attributes);
2836
2837 if (!NT_STATUS_IS_OK(status)) {
2838 DEBUG(2, ("open_directory: unable to create "
2839 "%s. Error was %s\n",
2840 smb_fname_str_dbg(smb_dname),
2841 nt_errstr(status)));
2842 return status;
2843 }
2844
2845 info = FILE_WAS_CREATED;
2846 break;
2847
2848 case FILE_OPEN_IF:
2849 /*
2850 * If directory exists open. If directory doesn't
2851 * exist create.
2852 */
2853
2854 if (dir_existed) {
2855 status = NT_STATUS_OK;
2856 info = FILE_WAS_OPENED;
2857 } else {
2858 status = mkdir_internal(conn, smb_dname,
2859 file_attributes);
2860
2861 if (NT_STATUS_IS_OK(status)) {
2862 info = FILE_WAS_CREATED;
2863 } else {
2864 /* Cope with create race. */
2865 if (!NT_STATUS_EQUAL(status,
2866 NT_STATUS_OBJECT_NAME_COLLISION)) {
2867 DEBUG(2, ("open_directory: unable to create "
2868 "%s. Error was %s\n",
2869 smb_fname_str_dbg(smb_dname),
2870 nt_errstr(status)));
2871 return status;
2872 }
2873 info = FILE_WAS_OPENED;
2874 }
2875 }
2876
2877 break;
2878
2879 case FILE_SUPERSEDE:
2880 case FILE_OVERWRITE:
2881 case FILE_OVERWRITE_IF:
2882 default:
2883 DEBUG(5,("open_directory: invalid create_disposition "
2884 "0x%x for directory %s\n",
2885 (unsigned int)create_disposition,
2886 smb_fname_str_dbg(smb_dname)));
2887 return NT_STATUS_INVALID_PARAMETER;
2888 }
2889
2890 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2891 DEBUG(5,("open_directory: %s is not a directory !\n",
2892 smb_fname_str_dbg(smb_dname)));
2893 return NT_STATUS_NOT_A_DIRECTORY;
2894 }
2895
2896 if (info == FILE_WAS_OPENED) {
2897 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2898 if (!NT_STATUS_IS_OK(status)) {
2899 DEBUG(10, ("open_directory: smbd_check_access_rights on "
2900 "file %s failed with %s\n",
2901 smb_fname_str_dbg(smb_dname),
2902 nt_errstr(status)));
2903 return status;
2904 }
2905 }
2906
2907 status = file_new(req, conn, &fsp);
2908 if(!NT_STATUS_IS_OK(status)) {
2909 return status;
2910 }
2911
2912 /*
2913 * Setup the files_struct for it.
2914 */
2915
2916 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2917 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2918 fsp->file_pid = req ? req->smbpid : 0;
2919 fsp->can_lock = False;
2920 fsp->can_read = False;
2921 fsp->can_write = False;
2922
2923 fsp->share_access = share_access;
2924 fsp->fh->private_options = 0;
2925 /*
2926 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2927 */
2928 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2929 fsp->print_file = NULL;
2930 fsp->modified = False;
2931 fsp->oplock_type = NO_OPLOCK;
2932 fsp->sent_oplock_break = NO_BREAK_SENT;
2933 fsp->is_directory = True;
2934 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2935 status = fsp_set_smb_fname(fsp, smb_dname);
2936 if (!NT_STATUS_IS_OK(status)) {
2937 file_free(req, fsp);
2938 return status;
2939 }
2940
2941 mtimespec = smb_dname->st.st_ex_mtime;
2942
2943 #ifdef O_DIRECTORY
2944 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2945 #else
2946 /* POSIX allows us to open a directory with O_RDONLY. */
2947 status = fd_open(conn, fsp, O_RDONLY, 0);
2948 #endif
2949 if (!NT_STATUS_IS_OK(status)) {
2950 DEBUG(5, ("open_directory: Could not open fd for "
2951 "%s (%s)\n",
2952 smb_fname_str_dbg(smb_dname),
2953 nt_errstr(status)));
2954 file_free(req, fsp);
2955 return status;
2956 }
2957
2958 status = vfs_stat_fsp(fsp);
2959 if (!NT_STATUS_IS_OK(status)) {
2960 fd_close(fsp);
2961 file_free(req, fsp);
2962 return status;
2963 }
2964
2965 /* Ensure there was no race condition. */
2966 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2967 DEBUG(5,("open_directory: stat struct differs for "
2968 "directory %s.\n",
2969 smb_fname_str_dbg(smb_dname)));
2970 fd_close(fsp);
2971 file_free(req, fsp);
2972 return NT_STATUS_ACCESS_DENIED;
2973 }
2974
2975 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2976 conn->connectpath, smb_dname,
2977 &mtimespec);
2978
2979 if (lck == NULL) {
2980 DEBUG(0, ("open_directory: Could not get share mode lock for "
2981 "%s\n", smb_fname_str_dbg(smb_dname)));
2982 fd_close(fsp);
2983 file_free(req, fsp);
2984 return NT_STATUS_SHARING_VIOLATION;
2985 }
2986
2987 status = open_mode_check(conn, lck, fsp->name_hash,
2988 access_mask, share_access,
2989 create_options, &dir_existed);
2990
2991 if (!NT_STATUS_IS_OK(status)) {
2992 TALLOC_FREE(lck);
2993 fd_close(fsp);
2994 file_free(req, fsp);
2995 return status;
2996 }
2997
2998 set_share_mode(lck, fsp, get_current_uid(conn),
2999 req ? req->mid : 0, NO_OPLOCK);
3000
3001 /* For directories the delete on close bit at open time seems
3002 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
3003 if (create_options & FILE_DELETE_ON_CLOSE) {
3004 status = can_set_delete_on_close(fsp, 0);
3005 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
3006 TALLOC_FREE(lck);
3007 fd_close(fsp);
3008 file_free(req, fsp);
3009 return status;
3010 }
3011
3012 if (NT_STATUS_IS_OK(status)) {
3013 /* Note that here we set the *inital* delete on close flag,
3014 not the regular one. The magic gets handled in close. */
3015 fsp->initial_delete_on_close = True;
3016 }
3017 }
3018
3019 TALLOC_FREE(lck);
3020
3021 if (pinfo) {
3022 *pinfo = info;
3023 }
3024
3025 *result = fsp;
3026 return NT_STATUS_OK;
3027 }
3028
3029 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
3030 struct smb_filename *smb_dname)
3031 {
3032 NTSTATUS status;
3033 files_struct *fsp;
3034
3035 status = SMB_VFS_CREATE_FILE(
3036 conn, /* conn */
3037 req, /* req */
3038 0, /* root_dir_fid */
3039 smb_dname, /* fname */
3040 FILE_READ_ATTRIBUTES, /* access_mask */
3041 FILE_SHARE_NONE, /* share_access */
3042 FILE_CREATE, /* create_disposition*/
3043 FILE_DIRECTORY_FILE, /* create_options */
3044 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
3045 0, /* oplock_request */
3046 0, /* allocation_size */
3047 0, /* private_flags */
3048 NULL, /* sd */
3049 NULL, /* ea_list */
3050 &fsp, /* result */
3051 NULL); /* pinfo */
3052
3053 if (NT_STATUS_IS_OK(status)) {
3054 close_file(req, fsp, NORMAL_CLOSE);
3055 }
3056
3057 return status;
3058 }
3059
3060 /****************************************************************************
3061 Receive notification that one of our open files has been renamed by another
3062 smbd process.
3063 ****************************************************************************/
3064
3065 void msg_file_was_renamed(struct messaging_context *msg,
3066 void *private_data,
3067 uint32_t msg_type,
3068 struct server_id server_id,
3069 DATA_BLOB *data)
3070 {
3071 files_struct *fsp;
3072 char *frm = (char *)data->data;
3073 struct file_id id;
3074 const char *sharepath;
3075 const char *base_name;
3076 const char *stream_name;
3077 struct smb_filename *smb_fname = NULL;
3078 size_t sp_len, bn_len;
3079 NTSTATUS status;
3080 struct smbd_server_connection *sconn =
3081 talloc_get_type_abort(private_data,
3082 struct smbd_server_connection);
3083
3084 if (data->data == NULL
3085 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3086 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3087 (int)data->length));
3088 return;
3089 }
3090
3091 /* Unpack the message. */
3092 pull_file_id_24(frm, &id);
3093 sharepath = &frm[24];
3094 sp_len = strlen(sharepath);
3095 base_name = sharepath + sp_len + 1;
3096 bn_len = strlen(base_name);
3097 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3098
3099 /* stream_name must always be NULL if there is no stream. */
3100 if (stream_name[0] == '\0') {
3101 stream_name = NULL;
3102 }
3103
3104 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3105 stream_name, NULL, &smb_fname);
3106 if (!NT_STATUS_IS_OK(status)) {
3107 return;
3108 }
3109
3110 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3111 "file_id %s\n",
3112 sharepath, smb_fname_str_dbg(smb_fname),
3113 file_id_string_tos(&id)));
3114
3115 for(fsp = file_find_di_first(sconn, id); fsp;
3116 fsp = file_find_di_next(fsp)) {
3117 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3118
3119 DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
3120 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
3121 smb_fname_str_dbg(smb_fname)));
3122 status = fsp_set_smb_fname(fsp, smb_fname);
3123 if (!NT_STATUS_IS_OK(status)) {
3124 goto out;
3125 }
3126 } else {
3127 /* TODO. JRA. */
3128 /* Now we have the complete path we can work out if this is
3129 actually within this share and adjust newname accordingly. */
3130 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3131 "not sharepath %s) "
3132 "%s from %s -> %s\n",
3133 fsp->conn->connectpath,
3134 sharepath,
3135 fsp_fnum_dbg(fsp),
3136 fsp_str_dbg(fsp),
3137 smb_fname_str_dbg(smb_fname)));
3138 }
3139 }
3140 out:
3141 TALLOC_FREE(smb_fname);
3142 return;
3143 }
3144
3145 /*
3146 * If a main file is opened for delete, all streams need to be checked for
3147 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3148 * If that works, delete them all by setting the delete on close and close.
3149 */
3150
3151 NTSTATUS open_streams_for_delete(connection_struct *conn,
3152 const char *fname)
3153 {
3154 struct stream_struct *stream_info = NULL;
3155 files_struct **streams = NULL;
3156 int i;
3157 unsigned int num_streams = 0;
3158 TALLOC_CTX *frame = talloc_stackframe();
3159 NTSTATUS status;
3160
3161 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3162 &num_streams, &stream_info);
3163
3164 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3165 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3166 DEBUG(10, ("no streams around\n"));
3167 TALLOC_FREE(frame);
3168 return NT_STATUS_OK;
3169 }
3170
3171 if (!NT_STATUS_IS_OK(status)) {
3172 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3173 nt_errstr(status)));
3174 goto fail;
3175 }
3176
3177 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3178 num_streams));
3179
3180 if (num_streams == 0) {
3181 TALLOC_FREE(frame);
3182 return NT_STATUS_OK;
3183 }
3184
3185 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3186 if (streams == NULL) {
3187 DEBUG(0, ("talloc failed\n"));
3188 status = NT_STATUS_NO_MEMORY;
3189 goto fail;
3190 }
3191
3192 for (i=0; i<num_streams; i++) {
3193 struct smb_filename *smb_fname = NULL;
3194
3195 if (strequal(stream_info[i].name, "::$DATA")) {
3196 streams[i] = NULL;
3197 continue;
3198 }
3199
3200 status = create_synthetic_smb_fname(talloc_tos(), fname,
3201 stream_info[i].name,
3202 NULL, &smb_fname);
3203 if (!NT_STATUS_IS_OK(status)) {
3204 goto fail;
3205 }
3206
3207 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3208 DEBUG(10, ("Unable to stat stream: %s\n",
3209 smb_fname_str_dbg(smb_fname)));
3210 }
3211
3212 status = SMB_VFS_CREATE_FILE(
3213 conn, /* conn */
3214 NULL, /* req */
3215 0, /* root_dir_fid */
3216 smb_fname, /* fname */
3217 DELETE_ACCESS, /* access_mask */
3218 (FILE_SHARE_READ | /* share_access */
3219 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3220 FILE_OPEN, /* create_disposition*/
3221 0, /* create_options */
3222 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3223 0, /* oplock_request */
3224 0, /* allocation_size */
3225 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3226 NULL, /* sd */
3227 NULL, /* ea_list */
3228 &streams[i], /* result */
3229 NULL); /* pinfo */
3230
3231 if (!NT_STATUS_IS_OK(status)) {
3232 DEBUG(10, ("Could not open stream %s: %s\n",
3233 smb_fname_str_dbg(smb_fname),
3234 nt_errstr(status)));
3235
3236 TALLOC_FREE(smb_fname);
3237 break;
3238 }
3239 TALLOC_FREE(smb_fname);
3240 }
3241
3242 /*
3243 * don't touch the variable "status" beyond this point :-)
3244 */
3245
3246 for (i -= 1 ; i >= 0; i--) {
3247 if (streams[i] == NULL) {
3248 continue;
3249 }
3250
3251 DEBUG(10, ("Closing stream # %d, %s\n", i,
3252 fsp_str_dbg(streams[i])));
3253 close_file(NULL, streams[i], NORMAL_CLOSE);
3254 }
3255
3256 fail:
3257 TALLOC_FREE(frame);
3258 return status;
3259 }
3260
3261 /*********************************************************************
3262 Create a default ACL by inheriting from the parent. If no inheritance
3263 from the parent available, don't set anything. This will leave the actual
3264 permissions the new file or directory already got from the filesystem
3265 as the NT ACL when read.
3266 *********************************************************************/
3267
3268 static NTSTATUS inherit_new_acl(files_struct *fsp)
3269 {
3270 TALLOC_CTX *ctx = talloc_tos();
3271 char *parent_name = NULL;
3272 struct security_descriptor *parent_desc = NULL;
3273 NTSTATUS status = NT_STATUS_OK;
3274 struct security_descriptor *psd = NULL;
3275 struct dom_sid *owner_sid = NULL;
3276 struct dom_sid *group_sid = NULL;
3277 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3278 bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3279 bool inheritable_components = false;
3280 size_t size = 0;
3281
3282 if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3283 return NT_STATUS_NO_MEMORY;
3284 }
3285
3286 status = SMB_VFS_GET_NT_ACL(fsp->conn,
3287 parent_name,
3288 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3289 &parent_desc);
3290 if (!NT_STATUS_IS_OK(status)) {
3291 return status;
3292 }
3293
3294 inheritable_components = sd_has_inheritable_components(parent_desc,
3295 fsp->is_directory);
3296
3297 if (!inheritable_components && !inherit_owner) {
3298 /* Nothing to inherit and not setting owner. */
3299 return NT_STATUS_OK;
3300 }
3301
3302 /* Create an inherited descriptor from the parent. */
3303
3304 if (DEBUGLEVEL >= 10) {
3305 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3306 fsp_str_dbg(fsp) ));
3307 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3308 }
3309
3310 /* Inherit from parent descriptor if "inherit owner" set. */
3311 if (inherit_owner) {
3312 owner_sid = parent_desc->owner_sid;
3313 group_sid = parent_desc->group_sid;
3314 }
3315
3316 if (owner_sid == NULL) {
3317 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3318 }
3319 if (group_sid == NULL) {
3320 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3321 }
3322
3323 status = se_create_child_secdesc(ctx,
3324 &psd,
3325 &size,
3326 parent_desc,
3327 owner_sid,
3328 group_sid,
3329 fsp->is_directory);
3330 if (!NT_STATUS_IS_OK(status)) {
3331 return status;
3332 }
3333
3334 /* If inheritable_components == false,
3335 se_create_child_secdesc()
3336 creates a security desriptor with a NULL dacl
3337 entry, but with SEC_DESC_DACL_PRESENT. We need
3338 to remove that flag. */
3339
3340 if (!inheritable_components) {
3341 security_info_sent &= ~SECINFO_DACL;
3342 psd->type &= ~SEC_DESC_DACL_PRESENT;
3343 }
3344
3345 if (DEBUGLEVEL >= 10) {
3346 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3347 fsp_str_dbg(fsp) ));
3348 NDR_PRINT_DEBUG(security_descriptor, psd);
3349 }
3350
3351 if (inherit_owner) {
3352 /* We need to be root to force this. */
3353 become_root();
3354 }
3355 status = SMB_VFS_FSET_NT_ACL(fsp,
3356 security_info_sent,
3357 psd);
3358 if (inherit_owner) {
3359 unbecome_root();
3360 }
3361 return status;
3362 }
3363
3364 /*
3365 * Wrapper around open_file_ntcreate and open_directory
3366 */
3367
3368 static NTSTATUS create_file_unixpath(connection_struct *conn,
3369 struct smb_request *req,
3370 struct smb_filename *smb_fname,
3371 uint32_t access_mask,
3372 uint32_t share_access,
3373 uint32_t create_disposition,
3374 uint32_t create_options,
3375 uint32_t file_attributes,
3376 uint32_t oplock_request,
3377 uint64_t allocation_size,
3378 uint32_t private_flags,
3379 struct security_descriptor *sd,
3380 struct ea_list *ea_list,
3381
3382 files_struct **result,
3383 int *pinfo)
3384 {
3385 int info = FILE_WAS_OPENED;
3386 files_struct *base_fsp = NULL;
3387 files_struct *fsp = NULL;
3388 NTSTATUS status;
3389
3390 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3391 "file_attributes = 0x%x, share_access = 0x%x, "
3392 "create_disposition = 0x%x create_options = 0x%x "
3393 "oplock_request = 0x%x private_flags = 0x%x "
3394 "ea_list = 0x%p, sd = 0x%p, "
3395 "fname = %s\n",
3396 (unsigned int)access_mask,
3397 (unsigned int)file_attributes,
3398 (unsigned int)share_access,
3399 (unsigned int)create_disposition,
3400 (unsigned int)create_options,
3401 (unsigned int)oplock_request,
3402 (unsigned int)private_flags,
3403 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3404
3405 if (create_options & FILE_OPEN_BY_FILE_ID) {
3406 status = NT_STATUS_NOT_SUPPORTED;
3407 goto fail;
3408 }
3409
3410 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3411 status = NT_STATUS_INVALID_PARAMETER;
3412 goto fail;
3413 }
3414
3415 if (req == NULL) {
3416 oplock_request |= INTERNAL_OPEN_ONLY;
3417 }
3418
3419 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3420 && (access_mask & DELETE_ACCESS)
3421 && !is_ntfs_stream_smb_fname(smb_fname)) {
3422 /*
3423 * We can't open a file with DELETE access if any of the
3424 * streams is open without FILE_SHARE_DELETE
3425 */
3426 status = open_streams_for_delete(conn, smb_fname->base_name);
3427
3428 if (!NT_STATUS_IS_OK(status)) {
3429 goto fail;
3430 }
3431 }
3432
3433 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3434 !security_token_has_privilege(get_current_nttok(conn),
3435 SEC_PRIV_SECURITY)) {
3436 DEBUG(10, ("create_file_unixpath: open on %s "
3437 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3438 smb_fname_str_dbg(smb_fname)));
3439 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3440 goto fail;
3441 }
3442
3443 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3444 && is_ntfs_stream_smb_fname(smb_fname)
3445 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3446 uint32 base_create_disposition;
3447 struct smb_filename *smb_fname_base = NULL;
3448
3449 if (create_options & FILE_DIRECTORY_FILE) {
3450 status = NT_STATUS_NOT_A_DIRECTORY;
3451 goto fail;
3452 }
3453
3454 switch (create_disposition) {
3455 case FILE_OPEN:
3456 base_create_disposition = FILE_OPEN;
3457 break;
3458 default:
3459 base_create_disposition = FILE_OPEN_IF;
3460 break;
3461 }
3462
3463 /* Create an smb_filename with stream_name == NULL. */
3464 status = create_synthetic_smb_fname(talloc_tos(),
3465 smb_fname->base_name,
3466 NULL, NULL,
3467 &smb_fname_base);
3468 if (!NT_STATUS_IS_OK(status)) {
3469 goto fail;
3470 }
3471
3472 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3473 DEBUG(10, ("Unable to stat stream: %s\n",
3474 smb_fname_str_dbg(smb_fname_base)));
3475 }
3476
3477 /* Open the base file. */
3478 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3479 FILE_SHARE_READ
3480 | FILE_SHARE_WRITE
3481 | FILE_SHARE_DELETE,
3482 base_create_disposition,
3483 0, 0, 0, 0, 0, NULL, NULL,
3484 &base_fsp, NULL);
3485 TALLOC_FREE(smb_fname_base);
3486
3487 if (!NT_STATUS_IS_OK(status)) {
3488 DEBUG(10, ("create_file_unixpath for base %s failed: "
3489 "%s\n", smb_fname->base_name,
3490 nt_errstr(status)));
3491 goto fail;
3492 }
3493 /* we don't need to low level fd */
3494 fd_close(base_fsp);
3495 }
3496
3497 /*
3498 * If it's a request for a directory open, deal with it separately.
3499 */
3500
3501 if (create_options & FILE_DIRECTORY_FILE) {
3502
3503 if (create_options & FILE_NON_DIRECTORY_FILE) {
3504 status = NT_STATUS_INVALID_PARAMETER;
3505 goto fail;
3506 }
3507
3508 /* Can't open a temp directory. IFS kit test. */
3509 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3510 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3511 status = NT_STATUS_INVALID_PARAMETER;
3512 goto fail;
3513 }
3514
3515 /*
3516 * We will get a create directory here if the Win32
3517 * app specified a security descriptor in the
3518 * CreateDirectory() call.
3519 */
3520
3521 oplock_request = 0;
3522 status = open_directory(
3523 conn, req, smb_fname, access_mask, share_access,
3524 create_disposition, create_options, file_attributes,
3525 &info, &fsp);
3526 } else {
3527
3528 /*
3529 * Ordinary file case.
3530 */
3531
3532 status = file_new(req, conn, &fsp);
3533 if(!NT_STATUS_IS_OK(status)) {
3534 goto fail;
3535 }
3536
3537 status = fsp_set_smb_fname(fsp, smb_fname);
3538 if (!NT_STATUS_IS_OK(status)) {
3539 goto fail;
3540 }
3541
3542 /*
3543 * We're opening the stream element of a base_fsp
3544 * we already opened. Set up the base_fsp pointer.
3545 */
3546 if (base_fsp) {
3547 fsp->base_fsp = base_fsp;
3548 }
3549
3550 status = open_file_ntcreate(conn,
3551 req,
3552 access_mask,
3553 share_access,
3554 create_disposition,
3555 create_options,
3556 file_attributes,
3557 oplock_request,
3558 private_flags,
3559 &info,
3560 fsp);
3561
3562 if(!NT_STATUS_IS_OK(status)) {
3563 file_free(req, fsp);
3564 fsp = NULL;
3565 }
3566
3567 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3568
3569 /* A stream open never opens a directory */
3570
3571 if (base_fsp) {
3572 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3573 goto fail;
3574 }
3575
3576 /*
3577 * Fail the open if it was explicitly a non-directory
3578 * file.
3579 */
3580
3581 if (create_options & FILE_NON_DIRECTORY_FILE) {
3582 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3583 goto fail;
3584 }
3585
3586 oplock_request = 0;
3587 status = open_directory(
3588 conn, req, smb_fname, access_mask,
3589 share_access, create_disposition,
3590 create_options, file_attributes,
3591 &info, &fsp);
3592 }
3593 }
3594
3595 if (!NT_STATUS_IS_OK(status)) {
3596 goto fail;
3597 }
3598
3599 fsp->base_fsp = base_fsp;
3600
3601 if ((ea_list != NULL) &&
3602 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3603 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3604 if (!NT_STATUS_IS_OK(status)) {
3605 goto fail;
3606 }
3607 }
3608
3609 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3610 status = NT_STATUS_ACCESS_DENIED;
3611 goto fail;
3612 }
3613
3614 /* Save the requested allocation size. */
3615 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3616 if (allocation_size
3617 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3618 fsp->initial_allocation_size = smb_roundup(
3619 fsp->conn, allocation_size);
3620 if (fsp->is_directory) {
3621 /* Can't set allocation size on a directory. */
3622 status = NT_STATUS_ACCESS_DENIED;
3623 goto fail;
3624 }
3625 if (vfs_allocate_file_space(
3626 fsp, fsp->initial_allocation_size) == -1) {
3627 status = NT_STATUS_DISK_FULL;
3628 goto fail;
3629 }
3630 } else {
3631 fsp->initial_allocation_size = smb_roundup(
3632 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3633 }
3634 }
3635
3636 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3637 fsp->base_fsp == NULL) {
3638 if (sd != NULL) {
3639 /*
3640 * According to the MS documentation, the only time the security
3641 * descriptor is applied to the opened file is iff we *created* the
3642 * file; an existing file stays the same.
3643 *
3644 * Also, it seems (from observation) that you can open the file with
3645 * any access mask but you can still write the sd. We need to override
3646 * the granted access before we call set_sd
3647 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3648 */
3649
3650 uint32_t sec_info_sent;
3651 uint32_t saved_access_mask = fsp->access_mask;
3652
3653 sec_info_sent = get_sec_info(sd);
3654
3655 fsp->access_mask = FILE_GENERIC_ALL;
3656
3657 /* Convert all the generic bits. */
3658 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3659 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3660
3661 if (sec_info_sent & (SECINFO_OWNER|
3662 SECINFO_GROUP|
3663 SECINFO_DACL|
3664 SECINFO_SACL)) {
3665 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3666 }
3667
3668 fsp->access_mask = saved_access_mask;
3669
3670 if (!NT_STATUS_IS_OK(status)) {
3671 goto fail;
3672 }
3673 } else if (lp_inherit_acls(SNUM(conn))) {
3674 /* Inherit from parent. Errors here are not fatal. */
3675 status = inherit_new_acl(fsp);
3676 if (!NT_STATUS_IS_OK(status)) {
3677 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3678 fsp_str_dbg(fsp),
3679 nt_errstr(status) ));
3680 }
3681 }
3682 }
3683
3684 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3685
3686 *result = fsp;
3687 if (pinfo != NULL) {
3688 *pinfo = info;
3689 }
3690
3691 smb_fname->st = fsp->fsp_name->st;
3692
3693 return NT_STATUS_OK;
3694
3695 fail:
3696 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3697
3698 if (fsp != NULL) {
3699 if (base_fsp && fsp->base_fsp == base_fsp) {
3700 /*
3701 * The close_file below will close
3702 * fsp->base_fsp.
3703 */
3704 base_fsp = NULL;
3705 }
3706 close_file(req, fsp, ERROR_CLOSE);
3707 fsp = NULL;
3708 }
3709 if (base_fsp != NULL) {
3710 close_file(req, base_fsp, ERROR_CLOSE);
3711 base_fsp = NULL;
3712 }
3713 return status;
3714 }
3715
3716 /*
3717 * Calculate the full path name given a relative fid.
3718 */
3719 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3720 struct smb_request *req,
3721 uint16_t root_dir_fid,
3722 const struct smb_filename *smb_fname,
3723 struct smb_filename **smb_fname_out)
3724 {
3725 files_struct *dir_fsp;
3726 char *parent_fname = NULL;
3727 char *new_base_name = NULL;
3728 NTSTATUS status;
3729
3730 if (root_dir_fid == 0 || !smb_fname) {
3731 status = NT_STATUS_INTERNAL_ERROR;
3732 goto out;
3733 }
3734
3735 dir_fsp = file_fsp(req, root_dir_fid);
3736
3737 if (dir_fsp == NULL) {
3738 status = NT_STATUS_INVALID_HANDLE;
3739 goto out;
3740 }
3741
3742 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3743 status = NT_STATUS_INVALID_HANDLE;
3744 goto out;
3745 }
3746
3747 if (!dir_fsp->is_directory) {
3748
3749 /*
3750 * Check to see if this is a mac fork of some kind.
3751 */
3752
3753 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3754 is_ntfs_stream_smb_fname(smb_fname)) {
3755 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3756 goto out;
3757 }
3758
3759 /*
3760 we need to handle the case when we get a
3761 relative open relative to a file and the
3762 pathname is blank - this is a reopen!
3763 (hint from demyn plantenberg)
3764 */
3765
3766 status = NT_STATUS_INVALID_HANDLE;
3767 goto out;
3768 }
3769
3770 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3771 /*
3772 * We're at the toplevel dir, the final file name
3773 * must not contain ./, as this is filtered out
3774 * normally by srvstr_get_path and unix_convert
3775 * explicitly rejects paths containing ./.
3776 */
3777 parent_fname = talloc_strdup(talloc_tos(), "");
3778 if (parent_fname == NULL) {
3779 status = NT_STATUS_NO_MEMORY;
3780 goto out;
3781 }
3782 } else {
3783 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3784
3785 /*
3786 * Copy in the base directory name.
3787 */
3788
3789 parent_fname = talloc_array(talloc_tos(), char,
3790 dir_name_len+2);
3791 if (parent_fname == NULL) {
3792 status = NT_STATUS_NO_MEMORY;
3793 goto out;
3794 }
3795 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3796 dir_name_len+1);
3797
3798 /*
3799 * Ensure it ends in a '/'.
3800 * We used TALLOC_SIZE +2 to add space for the '/'.
3801 */
3802
3803 if(dir_name_len
3804 && (parent_fname[dir_name_len-1] != '\\')
3805 && (parent_fname[dir_name_len-1] != '/')) {
3806 parent_fname[dir_name_len] = '/';
3807 parent_fname[dir_name_len+1] = '\0';
3808 }
3809 }
3810
3811 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3812 smb_fname->base_name);
3813 if (new_base_name == NULL) {
3814 status = NT_STATUS_NO_MEMORY;
3815 goto out;
3816 }
3817
3818 status = filename_convert(req,
3819 conn,
3820 req->flags2 & FLAGS2_DFS_PATHNAMES,
3821 new_base_name,
3822 0,
3823 NULL,
3824 smb_fname_out);
3825 if (!NT_STATUS_IS_OK(status)) {
3826 goto out;
3827 }
3828
3829 out:
3830 TALLOC_FREE(parent_fname);
3831 TALLOC_FREE(new_base_name);
3832 return status;
3833 }
3834
3835 NTSTATUS create_file_default(connection_struct *conn,
3836 struct smb_request *req,
3837 uint16_t root_dir_fid,
3838 struct smb_filename *smb_fname,
3839 uint32_t access_mask,
3840 uint32_t share_access,
3841 uint32_t create_disposition,
3842 uint32_t create_options,
3843 uint32_t file_attributes,
3844 uint32_t oplock_request,
3845 uint64_t allocation_size,
3846 uint32_t private_flags,
3847 struct security_descriptor *sd,
3848 struct ea_list *ea_list,
3849 files_struct **result,
3850 int *pinfo)
3851 {
3852 int info = FILE_WAS_OPENED;
3853 files_struct *fsp = NULL;
3854 NTSTATUS status;
3855 bool stream_name = false;
3856
3857 DEBUG(10,("create_file: access_mask = 0x%x "
3858 "file_attributes = 0x%x, share_access = 0x%x, "
3859 "create_disposition = 0x%x create_options = 0x%x "
3860 "oplock_request = 0x%x "
3861 "private_flags = 0x%x "
3862 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3863 "fname = %s\n",
3864 (unsigned int)access_mask,
3865 (unsigned int)file_attributes,
3866 (unsigned int)share_access,
3867 (unsigned int)create_disposition,
3868 (unsigned int)create_options,
3869 (unsigned int)oplock_request,
3870 (unsigned int)private_flags,
3871 (unsigned int)root_dir_fid,
3872 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3873
3874 /*
3875 * Calculate the filename from the root_dir_if if necessary.
3876 */
3877
3878 if (root_dir_fid != 0) {
3879 struct smb_filename *smb_fname_out = NULL;
3880 status = get_relative_fid_filename(conn, req, root_dir_fid,
3881 smb_fname, &smb_fname_out);
3882 if (!NT_STATUS_IS_OK(status)) {
3883 goto fail;
3884 }
3885 smb_fname = smb_fname_out;
3886 }
3887
3888 /*
3889 * Check to see if this is a mac fork of some kind.
3890 */
3891
3892 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3893 if (stream_name) {
3894 enum FAKE_FILE_TYPE fake_file_type;
3895
3896 fake_file_type = is_fake_file(smb_fname);
3897
3898 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3899
3900 /*
3901 * Here we go! support for changing the disk quotas
3902 * --metze
3903 *
3904 * We need to fake up to open this MAGIC QUOTA file
3905 * and return a valid FID.
3906 *
3907 * w2k close this file directly after openening xp
3908 * also tries a QUERY_FILE_INFO on the file and then
3909 * close it
3910 */
3911 status = open_fake_file(req, conn, req->vuid,
3912 fake_file_type, smb_fname,
3913 access_mask, &fsp);
3914 if (!NT_STATUS_IS_OK(status)) {
3915 goto fail;
3916 }
3917
3918 ZERO_STRUCT(smb_fname->st);
3919 goto done;
3920 }
3921
3922 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3923 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3924 goto fail;
3925 }
3926 }
3927
3928 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
3929 int ret;
3930 smb_fname->stream_name = NULL;
3931 /* We have to handle this error here. */
3932 if (create_options & FILE_DIRECTORY_FILE) {
3933 status = NT_STATUS_NOT_A_DIRECTORY;
3934 goto fail;
3935 }
3936 if (lp_posix_pathnames()) {
3937 ret = SMB_VFS_LSTAT(conn, smb_fname);
3938 } else {
3939 ret = SMB_VFS_STAT(conn, smb_fname);
3940 }
3941
3942 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3943 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3944 goto fail;
3945 }
3946 }
3947
3948 status = create_file_unixpath(
3949 conn, req, smb_fname, access_mask, share_access,
3950 create_disposition, create_options, file_attributes,
3951 oplock_request, allocation_size, private_flags,
3952 sd, ea_list,
3953 &fsp, &info);
3954
3955 if (!NT_STATUS_IS_OK(status)) {
3956 goto fail;
3957 }
3958
3959 done:
3960 DEBUG(10, ("create_file: info=%d\n", info));
3961
3962 *result = fsp;
3963 if (pinfo != NULL) {
3964 *pinfo = info;
3965 }
3966 return NT_STATUS_OK;
3967
3968 fail:
3969 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3970
3971 if (fsp != NULL) {
3972 close_file(req, fsp, ERROR_CLOSE);
3973 fsp = NULL;
3974 }
3975 return status;
3976 }
reg import