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s3:libsmb/cliconnect: make use of ntlmssp_is_anonymous()
[Samba/gebeck_regimport.git] / source3 / smbd / open.c
blob356a08fe420fad95445ec1f0da21b2dbc799c2e0
1 /*
2 Unix SMB/CIFS implementation.
3 file opening and share modes
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2004
6 Copyright (C) Volker Lendecke 2005
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "system/filesys.h"
24 #include "printing.h"
25 #include "smbd/smbd.h"
26 #include "smbd/globals.h"
27 #include "fake_file.h"
28 #include "../libcli/security/security.h"
29 #include "../librpc/gen_ndr/ndr_security.h"
30 #include "../librpc/gen_ndr/open_files.h"
31 #include "auth.h"
32 #include "messages.h"
33
34 extern const struct generic_mapping file_generic_mapping;
35
36 struct deferred_open_record {
37 bool delayed_for_oplocks;
38 struct file_id id;
39 };
40
41 /****************************************************************************
42 If the requester wanted DELETE_ACCESS and was rejected because
43 the file ACL didn't include DELETE_ACCESS, see if the parent ACL
44 ovverrides this.
45 ****************************************************************************/
46
47 static bool parent_override_delete(connection_struct *conn,
48 const struct smb_filename *smb_fname,
49 uint32_t access_mask,
50 uint32_t rejected_mask)
51 {
52 if ((access_mask & DELETE_ACCESS) &&
53 (rejected_mask & DELETE_ACCESS) &&
54 can_delete_file_in_directory(conn, smb_fname)) {
55 return true;
56 }
57 return false;
58 }
59
60 /****************************************************************************
61 Check if we have open rights.
62 ****************************************************************************/
63
64 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
65 const struct smb_filename *smb_fname,
66 uint32_t access_mask)
67 {
68 /* Check if we have rights to open. */
69 NTSTATUS status;
70 struct security_descriptor *sd = NULL;
71 uint32_t rejected_share_access;
72 uint32_t rejected_mask = access_mask;
73
74 rejected_share_access = access_mask & ~(conn->share_access);
75
76 if (rejected_share_access) {
77 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
78 "on %s (0x%x)\n",
79 (unsigned int)access_mask,
80 smb_fname_str_dbg(smb_fname),
81 (unsigned int)rejected_share_access ));
82 return NT_STATUS_ACCESS_DENIED;
83 }
84
85 if (get_current_uid(conn) == (uid_t)0) {
86 /* I'm sorry sir, I didn't know you were root... */
87 DEBUG(10,("smbd_check_access_rights: root override "
88 "on %s. Granting 0x%x\n",
89 smb_fname_str_dbg(smb_fname),
90 (unsigned int)access_mask ));
91 return NT_STATUS_OK;
92 }
93
94 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
95 DEBUG(10,("smbd_check_access_rights: not checking ACL "
96 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
97 smb_fname_str_dbg(smb_fname),
98 (unsigned int)access_mask ));
99 return NT_STATUS_OK;
100 }
101
102 if (access_mask == DELETE_ACCESS &&
103 VALID_STAT(smb_fname->st) &&
104 S_ISLNK(smb_fname->st.st_ex_mode)) {
105 /* We can always delete a symlink. */
106 DEBUG(10,("smbd_check_access_rights: not checking ACL "
107 "on DELETE_ACCESS on symlink %s.\n",
108 smb_fname_str_dbg(smb_fname) ));
109 return NT_STATUS_OK;
110 }
111
112 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
113 (SECINFO_OWNER |
114 SECINFO_GROUP |
115 SECINFO_DACL),&sd);
116
117 if (!NT_STATUS_IS_OK(status)) {
118 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
119 "on %s: %s\n",
120 smb_fname_str_dbg(smb_fname),
121 nt_errstr(status)));
122
123 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
124 goto access_denied;
125 }
126
127 return status;
128 }
129
130 /*
131 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
132 * owner WRITE_DAC and READ_CONTROL.
133 */
134 status = se_access_check(sd,
135 get_current_nttok(conn),
136 (access_mask & ~FILE_READ_ATTRIBUTES),
137 &rejected_mask);
138
139 DEBUG(10,("smbd_check_access_rights: file %s requesting "
140 "0x%x returning 0x%x (%s)\n",
141 smb_fname_str_dbg(smb_fname),
142 (unsigned int)access_mask,
143 (unsigned int)rejected_mask,
144 nt_errstr(status) ));
145
146 if (!NT_STATUS_IS_OK(status)) {
147 if (DEBUGLEVEL >= 10) {
148 DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
149 smb_fname_str_dbg(smb_fname) ));
150 NDR_PRINT_DEBUG(security_descriptor, sd);
151 }
152 }
153
154 TALLOC_FREE(sd);
155
156 if (NT_STATUS_IS_OK(status) ||
157 !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
158 return status;
159 }
160
161 /* Here we know status == NT_STATUS_ACCESS_DENIED. */
162
163 access_denied:
164
165 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
166 (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
167 !lp_store_dos_attributes(SNUM(conn)) &&
168 (lp_map_readonly(SNUM(conn)) ||
169 lp_map_archive(SNUM(conn)) ||
170 lp_map_hidden(SNUM(conn)) ||
171 lp_map_system(SNUM(conn)))) {
172 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
173
174 DEBUG(10,("smbd_check_access_rights: "
175 "overrode "
176 "FILE_WRITE_ATTRIBUTES "
177 "on file %s\n",
178 smb_fname_str_dbg(smb_fname)));
179 }
180
181 if (parent_override_delete(conn,
182 smb_fname,
183 access_mask,
184 rejected_mask)) {
185 /* Were we trying to do an open
186 * for delete and didn't get DELETE
187 * access (only) ? Check if the
188 * directory allows DELETE_CHILD.
189 * See here:
190 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
191 * for details. */
192
193 rejected_mask &= ~DELETE_ACCESS;
194
195 DEBUG(10,("smbd_check_access_rights: "
196 "overrode "
197 "DELETE_ACCESS on "
198 "file %s\n",
199 smb_fname_str_dbg(smb_fname)));
200 }
201
202 if (rejected_mask != 0) {
203 return NT_STATUS_ACCESS_DENIED;
204 }
205 return NT_STATUS_OK;
206 }
207
208 static NTSTATUS check_parent_access(struct connection_struct *conn,
209 struct smb_filename *smb_fname,
210 uint32_t access_mask,
211 char **pp_parent_dir)
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 (pp_parent_dir) {
226 *pp_parent_dir = parent_dir;
227 }
228
229 if (get_current_uid(conn) == (uid_t)0) {
230 /* I'm sorry sir, I didn't know you were root... */
231 DEBUG(10,("check_parent_access: root override "
232 "on %s. Granting 0x%x\n",
233 smb_fname_str_dbg(smb_fname),
234 (unsigned int)access_mask ));
235 return NT_STATUS_OK;
236 }
237
238 status = SMB_VFS_GET_NT_ACL(conn,
239 parent_dir,
240 SECINFO_DACL,
241 &parent_sd);
242
243 if (!NT_STATUS_IS_OK(status)) {
244 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
245 "%s with error %s\n",
246 parent_dir,
247 nt_errstr(status)));
248 return status;
249 }
250
251 /*
252 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
253 * owner WRITE_DAC and READ_CONTROL.
254 */
255 status = se_access_check(parent_sd,
256 get_current_nttok(conn),
257 (access_mask & ~FILE_READ_ATTRIBUTES),
258 &access_granted);
259 if(!NT_STATUS_IS_OK(status)) {
260 DEBUG(5,("check_parent_access: access check "
261 "on directory %s for "
262 "path %s for mask 0x%x returned (0x%x) %s\n",
263 parent_dir,
264 smb_fname->base_name,
265 access_mask,
266 access_granted,
267 nt_errstr(status) ));
268 return status;
269 }
270
271 return NT_STATUS_OK;
272 }
273
274 /****************************************************************************
275 fd support routines - attempt to do a dos_open.
276 ****************************************************************************/
277
278 static NTSTATUS fd_open(struct connection_struct *conn,
279 files_struct *fsp,
280 int flags,
281 mode_t mode)
282 {
283 struct smb_filename *smb_fname = fsp->fsp_name;
284 NTSTATUS status = NT_STATUS_OK;
285
286 #ifdef O_NOFOLLOW
287 /*
288 * Never follow symlinks on a POSIX client. The
289 * client should be doing this.
290 */
291
292 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
293 flags |= O_NOFOLLOW;
294 }
295 #endif
296
297 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
298 if (fsp->fh->fd == -1) {
299 status = map_nt_error_from_unix(errno);
300 if (errno == EMFILE) {
301 static time_t last_warned = 0L;
302
303 if (time((time_t *) NULL) > last_warned) {
304 DEBUG(0,("Too many open files, unable "
305 "to open more! smbd's max "
306 "open files = %d\n",
307 lp_max_open_files()));
308 last_warned = time((time_t *) NULL);
309 }
310 }
311
312 }
313
314 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
315 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
316 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
317
318 return status;
319 }
320
321 /****************************************************************************
322 Close the file associated with a fsp.
323 ****************************************************************************/
324
325 NTSTATUS fd_close(files_struct *fsp)
326 {
327 int ret;
328
329 if (fsp->dptr) {
330 dptr_CloseDir(fsp);
331 }
332 if (fsp->fh->fd == -1) {
333 return NT_STATUS_OK; /* What we used to call a stat open. */
334 }
335 if (fsp->fh->ref_count > 1) {
336 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
337 }
338
339 ret = SMB_VFS_CLOSE(fsp);
340 fsp->fh->fd = -1;
341 if (ret == -1) {
342 return map_nt_error_from_unix(errno);
343 }
344 return NT_STATUS_OK;
345 }
346
347 /****************************************************************************
348 Change the ownership of a file to that of the parent directory.
349 Do this by fd if possible.
350 ****************************************************************************/
351
352 void change_file_owner_to_parent(connection_struct *conn,
353 const char *inherit_from_dir,
354 files_struct *fsp)
355 {
356 struct smb_filename *smb_fname_parent = NULL;
357 NTSTATUS status;
358 int ret;
359
360 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
361 NULL, NULL, &smb_fname_parent);
362 if (!NT_STATUS_IS_OK(status)) {
363 return;
364 }
365
366 ret = SMB_VFS_STAT(conn, smb_fname_parent);
367 if (ret == -1) {
368 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
369 "directory %s. Error was %s\n",
370 smb_fname_str_dbg(smb_fname_parent),
371 strerror(errno)));
372 TALLOC_FREE(smb_fname_parent);
373 return;
374 }
375
376 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
377 /* Already this uid - no need to change. */
378 DEBUG(10,("change_file_owner_to_parent: file %s "
379 "is already owned by uid %d\n",
380 fsp_str_dbg(fsp),
381 (int)fsp->fsp_name->st.st_ex_uid ));
382 TALLOC_FREE(smb_fname_parent);
383 return;
384 }
385
386 become_root();
387 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
388 unbecome_root();
389 if (ret == -1) {
390 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
391 "file %s to parent directory uid %u. Error "
392 "was %s\n", fsp_str_dbg(fsp),
393 (unsigned int)smb_fname_parent->st.st_ex_uid,
394 strerror(errno) ));
395 } else {
396 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
397 "parent directory uid %u.\n", fsp_str_dbg(fsp),
398 (unsigned int)smb_fname_parent->st.st_ex_uid));
399 /* Ensure the uid entry is updated. */
400 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
401 }
402
403 TALLOC_FREE(smb_fname_parent);
404 }
405
406 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
407 const char *inherit_from_dir,
408 const char *fname,
409 SMB_STRUCT_STAT *psbuf)
410 {
411 struct smb_filename *smb_fname_parent = NULL;
412 struct smb_filename *smb_fname_cwd = NULL;
413 char *saved_dir = NULL;
414 TALLOC_CTX *ctx = talloc_tos();
415 NTSTATUS status = NT_STATUS_OK;
416 int ret;
417
418 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
419 &smb_fname_parent);
420 if (!NT_STATUS_IS_OK(status)) {
421 return status;
422 }
423
424 ret = SMB_VFS_STAT(conn, smb_fname_parent);
425 if (ret == -1) {
426 status = map_nt_error_from_unix(errno);
427 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
428 "directory %s. Error was %s\n",
429 smb_fname_str_dbg(smb_fname_parent),
430 strerror(errno)));
431 goto out;
432 }
433
434 /* We've already done an lstat into psbuf, and we know it's a
435 directory. If we can cd into the directory and the dev/ino
436 are the same then we can safely chown without races as
437 we're locking the directory in place by being in it. This
438 should work on any UNIX (thanks tridge :-). JRA.
439 */
440
441 saved_dir = vfs_GetWd(ctx,conn);
442 if (!saved_dir) {
443 status = map_nt_error_from_unix(errno);
444 DEBUG(0,("change_dir_owner_to_parent: failed to get "
445 "current working directory. Error was %s\n",
446 strerror(errno)));
447 goto out;
448 }
449
450 /* Chdir into the new path. */
451 if (vfs_ChDir(conn, fname) == -1) {
452 status = map_nt_error_from_unix(errno);
453 DEBUG(0,("change_dir_owner_to_parent: failed to change "
454 "current working directory to %s. Error "
455 "was %s\n", fname, strerror(errno) ));
456 goto chdir;
457 }
458
459 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
460 &smb_fname_cwd);
461 if (!NT_STATUS_IS_OK(status)) {
462 return status;
463 }
464
465 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
466 if (ret == -1) {
467 status = map_nt_error_from_unix(errno);
468 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
469 "directory '.' (%s) Error was %s\n",
470 fname, strerror(errno)));
471 goto chdir;
472 }
473
474 /* Ensure we're pointing at the same place. */
475 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
476 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
477 DEBUG(0,("change_dir_owner_to_parent: "
478 "device/inode on directory %s changed. "
479 "Refusing to chown !\n", fname ));
480 status = NT_STATUS_ACCESS_DENIED;
481 goto chdir;
482 }
483
484 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
485 /* Already this uid - no need to change. */
486 DEBUG(10,("change_dir_owner_to_parent: directory %s "
487 "is already owned by uid %d\n",
488 fname,
489 (int)smb_fname_cwd->st.st_ex_uid ));
490 status = NT_STATUS_OK;
491 goto chdir;
492 }
493
494 become_root();
495 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
496 (gid_t)-1);
497 unbecome_root();
498 if (ret == -1) {
499 status = map_nt_error_from_unix(errno);
500 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
501 "directory %s to parent directory uid %u. "
502 "Error was %s\n", fname,
503 (unsigned int)smb_fname_parent->st.st_ex_uid,
504 strerror(errno) ));
505 } else {
506 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
507 "directory %s to parent directory uid %u.\n",
508 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
509 /* Ensure the uid entry is updated. */
510 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
511 }
512
513 chdir:
514 vfs_ChDir(conn,saved_dir);
515 out:
516 TALLOC_FREE(smb_fname_parent);
517 TALLOC_FREE(smb_fname_cwd);
518 return status;
519 }
520
521 /****************************************************************************
522 Open a file.
523 ****************************************************************************/
524
525 static NTSTATUS open_file(files_struct *fsp,
526 connection_struct *conn,
527 struct smb_request *req,
528 const char *parent_dir,
529 int flags,
530 mode_t unx_mode,
531 uint32 access_mask, /* client requested access mask. */
532 uint32 open_access_mask) /* what we're actually using in the open. */
533 {
534 struct smb_filename *smb_fname = fsp->fsp_name;
535 NTSTATUS status = NT_STATUS_OK;
536 int accmode = (flags & O_ACCMODE);
537 int local_flags = flags;
538 bool file_existed = VALID_STAT(fsp->fsp_name->st);
539 bool file_created = false;
540
541 fsp->fh->fd = -1;
542 errno = EPERM;
543
544 /* Check permissions */
545
546 /*
547 * This code was changed after seeing a client open request
548 * containing the open mode of (DENY_WRITE/read-only) with
549 * the 'create if not exist' bit set. The previous code
550 * would fail to open the file read only on a read-only share
551 * as it was checking the flags parameter directly against O_RDONLY,
552 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
553 * JRA.
554 */
555
556 if (!CAN_WRITE(conn)) {
557 /* It's a read-only share - fail if we wanted to write. */
558 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
559 DEBUG(3,("Permission denied opening %s\n",
560 smb_fname_str_dbg(smb_fname)));
561 return NT_STATUS_ACCESS_DENIED;
562 } else if(flags & O_CREAT) {
563 /* We don't want to write - but we must make sure that
564 O_CREAT doesn't create the file if we have write
565 access into the directory.
566 */
567 flags &= ~(O_CREAT|O_EXCL);
568 local_flags &= ~(O_CREAT|O_EXCL);
569 }
570 }
571
572 /*
573 * This little piece of insanity is inspired by the
574 * fact that an NT client can open a file for O_RDONLY,
575 * but set the create disposition to FILE_EXISTS_TRUNCATE.
576 * If the client *can* write to the file, then it expects to
577 * truncate the file, even though it is opening for readonly.
578 * Quicken uses this stupid trick in backup file creation...
579 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
580 * for helping track this one down. It didn't bite us in 2.0.x
581 * as we always opened files read-write in that release. JRA.
582 */
583
584 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
585 DEBUG(10,("open_file: truncate requested on read-only open "
586 "for file %s\n", smb_fname_str_dbg(smb_fname)));
587 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
588 }
589
590 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
591 (!file_existed && (local_flags & O_CREAT)) ||
592 ((local_flags & O_TRUNC) == O_TRUNC) ) {
593 const char *wild;
594
595 /*
596 * We can't actually truncate here as the file may be locked.
597 * open_file_ntcreate will take care of the truncate later. JRA.
598 */
599
600 local_flags &= ~O_TRUNC;
601
602 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
603 /*
604 * We would block on opening a FIFO with no one else on the
605 * other end. Do what we used to do and add O_NONBLOCK to the
606 * open flags. JRA.
607 */
608
609 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
610 local_flags |= O_NONBLOCK;
611 }
612 #endif
613
614 /* Don't create files with Microsoft wildcard characters. */
615 if (fsp->base_fsp) {
616 /*
617 * wildcard characters are allowed in stream names
618 * only test the basefilename
619 */
620 wild = fsp->base_fsp->fsp_name->base_name;
621 } else {
622 wild = smb_fname->base_name;
623 }
624 if ((local_flags & O_CREAT) && !file_existed &&
625 ms_has_wild(wild)) {
626 return NT_STATUS_OBJECT_NAME_INVALID;
627 }
628
629 /* Can we access this file ? */
630 if (!fsp->base_fsp) {
631 /* Only do this check on non-stream open. */
632 if (file_existed) {
633 status = smbd_check_access_rights(conn,
634 smb_fname,
635 access_mask);
636 } else if (local_flags & O_CREAT){
637 status = check_parent_access(conn,
638 smb_fname,
639 SEC_DIR_ADD_FILE,
640 NULL);
641 } else {
642 /* File didn't exist and no O_CREAT. */
643 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
644 }
645 if (!NT_STATUS_IS_OK(status)) {
646 DEBUG(10,("open_file: "
647 "%s on file "
648 "%s returned %s\n",
649 file_existed ?
650 "smbd_check_access_rights" :
651 "check_parent_access",
652 smb_fname_str_dbg(smb_fname),
653 nt_errstr(status) ));
654 return status;
655 }
656 }
657
658 /* Actually do the open */
659 status = fd_open(conn, fsp, local_flags, unx_mode);
660 if (!NT_STATUS_IS_OK(status)) {
661 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
662 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
663 nt_errstr(status),local_flags,flags));
664 return status;
665 }
666
667 if ((local_flags & O_CREAT) && !file_existed) {
668 file_created = true;
669 }
670
671 } else {
672 fsp->fh->fd = -1; /* What we used to call a stat open. */
673 if (!file_existed) {
674 /* File must exist for a stat open. */
675 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
676 }
677
678 status = smbd_check_access_rights(conn,
679 smb_fname,
680 access_mask);
681
682 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
683 fsp->posix_open &&
684 S_ISLNK(smb_fname->st.st_ex_mode)) {
685 /* This is a POSIX stat open for delete
686 * or rename on a symlink that points
687 * nowhere. Allow. */
688 DEBUG(10,("open_file: allowing POSIX "
689 "open on bad symlink %s\n",
690 smb_fname_str_dbg(smb_fname)));
691 status = NT_STATUS_OK;
692 }
693
694 if (!NT_STATUS_IS_OK(status)) {
695 DEBUG(10,("open_file: "
696 "smbd_check_access_rights on file "
697 "%s returned %s\n",
698 smb_fname_str_dbg(smb_fname),
699 nt_errstr(status) ));
700 return status;
701 }
702 }
703
704 if (!file_existed) {
705 int ret;
706
707 if (fsp->fh->fd == -1) {
708 ret = SMB_VFS_STAT(conn, smb_fname);
709 } else {
710 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
711 /* If we have an fd, this stat should succeed. */
712 if (ret == -1) {
713 DEBUG(0,("Error doing fstat on open file %s "
714 "(%s)\n",
715 smb_fname_str_dbg(smb_fname),
716 strerror(errno) ));
717 }
718 }
719
720 /* For a non-io open, this stat failing means file not found. JRA */
721 if (ret == -1) {
722 status = map_nt_error_from_unix(errno);
723 fd_close(fsp);
724 return status;
725 }
726
727 if (file_created) {
728 bool need_re_stat = false;
729 /* Do all inheritance work after we've
730 done a successful stat call and filled
731 in the stat struct in fsp->fsp_name. */
732
733 /* Inherit the ACL if required */
734 if (lp_inherit_perms(SNUM(conn))) {
735 inherit_access_posix_acl(conn, parent_dir,
736 smb_fname->base_name,
737 unx_mode);
738 need_re_stat = true;
739 }
740
741 /* Change the owner if required. */
742 if (lp_inherit_owner(SNUM(conn))) {
743 change_file_owner_to_parent(conn, parent_dir,
744 fsp);
745 need_re_stat = true;
746 }
747
748 if (need_re_stat) {
749 if (fsp->fh->fd == -1) {
750 ret = SMB_VFS_STAT(conn, smb_fname);
751 } else {
752 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
753 /* If we have an fd, this stat should succeed. */
754 if (ret == -1) {
755 DEBUG(0,("Error doing fstat on open file %s "
756 "(%s)\n",
757 smb_fname_str_dbg(smb_fname),
758 strerror(errno) ));
759 }
760 }
761 }
762
763 notify_fname(conn, NOTIFY_ACTION_ADDED,
764 FILE_NOTIFY_CHANGE_FILE_NAME,
765 smb_fname->base_name);
766 }
767 }
768
769 /*
770 * POSIX allows read-only opens of directories. We don't
771 * want to do this (we use a different code path for this)
772 * so catch a directory open and return an EISDIR. JRA.
773 */
774
775 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
776 fd_close(fsp);
777 errno = EISDIR;
778 return NT_STATUS_FILE_IS_A_DIRECTORY;
779 }
780
781 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
782 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
783 fsp->file_pid = req ? req->smbpid : 0;
784 fsp->can_lock = True;
785 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
786 if (!CAN_WRITE(conn)) {
787 fsp->can_write = False;
788 } else {
789 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
790 True : False;
791 }
792 fsp->print_file = NULL;
793 fsp->modified = False;
794 fsp->sent_oplock_break = NO_BREAK_SENT;
795 fsp->is_directory = False;
796 if (conn->aio_write_behind_list &&
797 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
798 conn->case_sensitive)) {
799 fsp->aio_write_behind = True;
800 }
801
802 fsp->wcp = NULL; /* Write cache pointer. */
803
804 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
805 conn->session_info->unix_info->unix_name,
806 smb_fname_str_dbg(smb_fname),
807 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
808 conn->num_files_open));
809
810 errno = 0;
811 return NT_STATUS_OK;
812 }
813
814 /****************************************************************************
815 Check if we can open a file with a share mode.
816 Returns True if conflict, False if not.
817 ****************************************************************************/
818
819 static bool share_conflict(struct share_mode_entry *entry,
820 uint32 access_mask,
821 uint32 share_access)
822 {
823 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
824 "entry->share_access = 0x%x, "
825 "entry->private_options = 0x%x\n",
826 (unsigned int)entry->access_mask,
827 (unsigned int)entry->share_access,
828 (unsigned int)entry->private_options));
829
830 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
831 (unsigned int)access_mask, (unsigned int)share_access));
832
833 if ((entry->access_mask & (FILE_WRITE_DATA|
834 FILE_APPEND_DATA|
835 FILE_READ_DATA|
836 FILE_EXECUTE|
837 DELETE_ACCESS)) == 0) {
838 DEBUG(10,("share_conflict: No conflict due to "
839 "entry->access_mask = 0x%x\n",
840 (unsigned int)entry->access_mask ));
841 return False;
842 }
843
844 if ((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 "access_mask = 0x%x\n",
851 (unsigned int)access_mask ));
852 return False;
853 }
854
855 #if 1 /* JRA TEST - Superdebug. */
856 #define CHECK_MASK(num, am, right, sa, share) \
857 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
858 (unsigned int)(num), (unsigned int)(am), \
859 (unsigned int)(right), (unsigned int)(am)&(right) )); \
860 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
861 (unsigned int)(num), (unsigned int)(sa), \
862 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
863 if (((am) & (right)) && !((sa) & (share))) { \
864 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
865 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
866 (unsigned int)(share) )); \
867 return True; \
868 }
869 #else
870 #define CHECK_MASK(num, am, right, sa, share) \
871 if (((am) & (right)) && !((sa) & (share))) { \
872 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
873 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
874 (unsigned int)(share) )); \
875 return True; \
876 }
877 #endif
878
879 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
880 share_access, FILE_SHARE_WRITE);
881 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
882 entry->share_access, FILE_SHARE_WRITE);
883
884 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
885 share_access, FILE_SHARE_READ);
886 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
887 entry->share_access, FILE_SHARE_READ);
888
889 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
890 share_access, FILE_SHARE_DELETE);
891 CHECK_MASK(6, access_mask, DELETE_ACCESS,
892 entry->share_access, FILE_SHARE_DELETE);
893
894 DEBUG(10,("share_conflict: No conflict.\n"));
895 return False;
896 }
897
898 #if defined(DEVELOPER)
899 static void validate_my_share_entries(struct smbd_server_connection *sconn,
900 int num,
901 struct share_mode_entry *share_entry)
902 {
903 files_struct *fsp;
904
905 if (!procid_is_me(&share_entry->pid)) {
906 return;
907 }
908
909 if (is_deferred_open_entry(share_entry) &&
910 !open_was_deferred(sconn, share_entry->op_mid)) {
911 char *str = talloc_asprintf(talloc_tos(),
912 "Got a deferred entry without a request: "
913 "PANIC: %s\n",
914 share_mode_str(talloc_tos(), num, share_entry));
915 smb_panic(str);
916 }
917
918 if (!is_valid_share_mode_entry(share_entry)) {
919 return;
920 }
921
922 fsp = file_find_dif(sconn, share_entry->id,
923 share_entry->share_file_id);
924 if (!fsp) {
925 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
926 share_mode_str(talloc_tos(), num, share_entry) ));
927 smb_panic("validate_my_share_entries: Cannot match a "
928 "share entry with an open file\n");
929 }
930
931 if (is_deferred_open_entry(share_entry)) {
932 goto panic;
933 }
934
935 if ((share_entry->op_type == NO_OPLOCK) &&
936 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
937 /* Someone has already written to it, but I haven't yet
938 * noticed */
939 return;
940 }
941
942 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
943 goto panic;
944 }
945
946 return;
947
948 panic:
949 {
950 char *str;
951 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
952 share_mode_str(talloc_tos(), num, share_entry) ));
953 str = talloc_asprintf(talloc_tos(),
954 "validate_my_share_entries: "
955 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
956 fsp->fsp_name->base_name,
957 (unsigned int)fsp->oplock_type,
958 (unsigned int)share_entry->op_type );
959 smb_panic(str);
960 }
961 }
962 #endif
963
964 bool is_stat_open(uint32 access_mask)
965 {
966 return (access_mask &&
967 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
968 FILE_WRITE_ATTRIBUTES))==0) &&
969 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
970 FILE_WRITE_ATTRIBUTES)) != 0));
971 }
972
973 /****************************************************************************
974 Deal with share modes
975 Invarient: Share mode must be locked on entry and exit.
976 Returns -1 on error, or number of share modes on success (may be zero).
977 ****************************************************************************/
978
979 static NTSTATUS open_mode_check(connection_struct *conn,
980 struct share_mode_lock *lck,
981 uint32_t name_hash,
982 uint32 access_mask,
983 uint32 share_access,
984 uint32 create_options,
985 bool *file_existed)
986 {
987 int i;
988
989 if(lck->data->num_share_modes == 0) {
990 return NT_STATUS_OK;
991 }
992
993 *file_existed = True;
994
995 /* A delete on close prohibits everything */
996
997 if (is_delete_on_close_set(lck, name_hash)) {
998 return NT_STATUS_DELETE_PENDING;
999 }
1000
1001 if (is_stat_open(access_mask)) {
1002 /* Stat open that doesn't trigger oplock breaks or share mode
1003 * checks... ! JRA. */
1004 return NT_STATUS_OK;
1005 }
1006
1007 /*
1008 * Check if the share modes will give us access.
1009 */
1010
1011 #if defined(DEVELOPER)
1012 for(i = 0; i < lck->data->num_share_modes; i++) {
1013 validate_my_share_entries(conn->sconn, i,
1014 &lck->data->share_modes[i]);
1015 }
1016 #endif
1017
1018 if (!lp_share_modes(SNUM(conn))) {
1019 return NT_STATUS_OK;
1020 }
1021
1022 /* Now we check the share modes, after any oplock breaks. */
1023 for(i = 0; i < lck->data->num_share_modes; i++) {
1024
1025 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1026 continue;
1027 }
1028
1029 /* someone else has a share lock on it, check to see if we can
1030 * too */
1031 if (share_conflict(&lck->data->share_modes[i],
1032 access_mask, share_access)) {
1033 return NT_STATUS_SHARING_VIOLATION;
1034 }
1035 }
1036
1037 return NT_STATUS_OK;
1038 }
1039
1040 static bool is_delete_request(files_struct *fsp) {
1041 return ((fsp->access_mask == DELETE_ACCESS) &&
1042 (fsp->oplock_type == NO_OPLOCK));
1043 }
1044
1045 /*
1046 * Send a break message to the oplock holder and delay the open for
1047 * our client.
1048 */
1049
1050 static NTSTATUS send_break_message(files_struct *fsp,
1051 struct share_mode_entry *exclusive,
1052 uint64_t mid,
1053 int oplock_request)
1054 {
1055 NTSTATUS status;
1056 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1057
1058 DEBUG(10, ("Sending break request to PID %s\n",
1059 procid_str_static(&exclusive->pid)));
1060 exclusive->op_mid = mid;
1061
1062 /* Create the message. */
1063 share_mode_entry_to_message(msg, exclusive);
1064
1065 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1066 don't want this set in the share mode struct pointed to by lck. */
1067
1068 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1069 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1070 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1071 }
1072
1073 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1074 MSG_SMB_BREAK_REQUEST,
1075 (uint8 *)msg,
1076 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1077 if (!NT_STATUS_IS_OK(status)) {
1078 DEBUG(3, ("Could not send oplock break message: %s\n",
1079 nt_errstr(status)));
1080 }
1081
1082 return status;
1083 }
1084
1085 /*
1086 * Return share_mode_entry pointers for :
1087 * 1). Batch oplock entry.
1088 * 2). Batch or exclusive oplock entry (may be identical to #1).
1089 * bool have_level2_oplock
1090 * bool have_no_oplock.
1091 * Do internal consistency checks on the share mode for a file.
1092 */
1093
1094 static void find_oplock_types(files_struct *fsp,
1095 int oplock_request,
1096 const struct share_mode_lock *lck,
1097 struct share_mode_entry **pp_batch,
1098 struct share_mode_entry **pp_ex_or_batch,
1099 bool *got_level2,
1100 bool *got_no_oplock)
1101 {
1102 int i;
1103
1104 *pp_batch = NULL;
1105 *pp_ex_or_batch = NULL;
1106 *got_level2 = false;
1107 *got_no_oplock = false;
1108
1109 /* Ignore stat or internal opens, as is done in
1110 delay_for_batch_oplocks() and
1111 delay_for_exclusive_oplocks().
1112 */
1113 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1114 return;
1115 }
1116
1117 for (i=0; i<lck->data->num_share_modes; i++) {
1118 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1119 continue;
1120 }
1121
1122 if (lck->data->share_modes[i].op_type == NO_OPLOCK &&
1123 is_stat_open(lck->data->share_modes[i].access_mask)) {
1124 /* We ignore stat opens in the table - they
1125 always have NO_OPLOCK and never get or
1126 cause breaks. JRA. */
1127 continue;
1128 }
1129
1130 if (BATCH_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1131 /* batch - can only be one. */
1132 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1133 smb_panic("Bad batch oplock entry.");
1134 }
1135 *pp_batch = &lck->data->share_modes[i];
1136 }
1137
1138 if (EXCLUSIVE_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1139 /* Exclusive or batch - can only be one. */
1140 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1141 smb_panic("Bad exclusive or batch oplock entry.");
1142 }
1143 *pp_ex_or_batch = &lck->data->share_modes[i];
1144 }
1145
1146 if (LEVEL_II_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1147 if (*pp_batch || *pp_ex_or_batch) {
1148 smb_panic("Bad levelII oplock entry.");
1149 }
1150 *got_level2 = true;
1151 }
1152
1153 if (lck->data->share_modes[i].op_type == NO_OPLOCK) {
1154 if (*pp_batch || *pp_ex_or_batch) {
1155 smb_panic("Bad no oplock entry.");
1156 }
1157 *got_no_oplock = true;
1158 }
1159 }
1160 }
1161
1162 static bool delay_for_batch_oplocks(files_struct *fsp,
1163 uint64_t mid,
1164 int oplock_request,
1165 struct share_mode_entry *batch_entry)
1166 {
1167 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1168 return false;
1169 }
1170 if (batch_entry == NULL) {
1171 return false;
1172 }
1173
1174 /* Found a batch oplock */
1175 send_break_message(fsp, batch_entry, mid, oplock_request);
1176 return true;
1177 }
1178
1179 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1180 uint64_t mid,
1181 int oplock_request,
1182 struct share_mode_entry *ex_entry)
1183 {
1184 bool delay_it;
1185
1186 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1187 return false;
1188 }
1189 if (ex_entry == NULL) {
1190 return false;
1191 }
1192
1193 /* Found an exclusive or batch oplock */
1194
1195 delay_it = is_delete_request(fsp) ?
1196 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1197
1198 if (!delay_it) {
1199 return false;
1200 }
1201
1202 send_break_message(fsp, ex_entry, mid, oplock_request);
1203 return true;
1204 }
1205
1206 static bool file_has_brlocks(files_struct *fsp)
1207 {
1208 struct byte_range_lock *br_lck;
1209
1210 br_lck = brl_get_locks_readonly(fsp);
1211 if (!br_lck)
1212 return false;
1213
1214 return br_lck->num_locks > 0 ? true : false;
1215 }
1216
1217 static void grant_fsp_oplock_type(files_struct *fsp,
1218 int oplock_request,
1219 bool got_level2_oplock,
1220 bool got_a_none_oplock)
1221 {
1222 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1223 lp_level2_oplocks(SNUM(fsp->conn));
1224
1225 /* Start by granting what the client asked for,
1226 but ensure no SAMBA_PRIVATE bits can be set. */
1227 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1228
1229 if (oplock_request & INTERNAL_OPEN_ONLY) {
1230 /* No oplocks on internal open. */
1231 fsp->oplock_type = NO_OPLOCK;
1232 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1233 fsp->oplock_type, fsp_str_dbg(fsp)));
1234 return;
1235 } else if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1236 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1237 fsp_str_dbg(fsp)));
1238 fsp->oplock_type = NO_OPLOCK;
1239 }
1240
1241 if (is_stat_open(fsp->access_mask)) {
1242 /* Leave the value already set. */
1243 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1244 fsp->oplock_type, fsp_str_dbg(fsp)));
1245 return;
1246 }
1247
1248 /*
1249 * Match what was requested (fsp->oplock_type) with
1250 * what was found in the existing share modes.
1251 */
1252
1253 if (got_a_none_oplock) {
1254 fsp->oplock_type = NO_OPLOCK;
1255 } else if (got_level2_oplock) {
1256 if (fsp->oplock_type == NO_OPLOCK ||
1257 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1258 /* Store a level2 oplock, but don't tell the client */
1259 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1260 } else {
1261 fsp->oplock_type = LEVEL_II_OPLOCK;
1262 }
1263 } else {
1264 /* All share_mode_entries are placeholders or deferred.
1265 * Silently upgrade to fake levelII if the client didn't
1266 * ask for an oplock. */
1267 if (fsp->oplock_type == NO_OPLOCK) {
1268 /* Store a level2 oplock, but don't tell the client */
1269 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1270 }
1271 }
1272
1273 /*
1274 * Don't grant level2 to clients that don't want them
1275 * or if we've turned them off.
1276 */
1277 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1278 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1279 }
1280
1281 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1282 fsp->oplock_type, fsp_str_dbg(fsp)));
1283 }
1284
1285 bool request_timed_out(struct timeval request_time,
1286 struct timeval timeout)
1287 {
1288 struct timeval now, end_time;
1289 GetTimeOfDay(&now);
1290 end_time = timeval_sum(&request_time, &timeout);
1291 return (timeval_compare(&end_time, &now) < 0);
1292 }
1293
1294 /****************************************************************************
1295 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1296 ****************************************************************************/
1297
1298 static void defer_open(struct share_mode_lock *lck,
1299 struct timeval request_time,
1300 struct timeval timeout,
1301 struct smb_request *req,
1302 struct deferred_open_record *state)
1303 {
1304 int i;
1305
1306 /* Paranoia check */
1307
1308 for (i=0; i<lck->data->num_share_modes; i++) {
1309 struct share_mode_entry *e = &lck->data->share_modes[i];
1310
1311 if (is_deferred_open_entry(e) &&
1312 procid_is_me(&e->pid) &&
1313 (e->op_mid == req->mid)) {
1314 DEBUG(0, ("Trying to defer an already deferred "
1315 "request: mid=%llu, exiting\n",
1316 (unsigned long long)req->mid));
1317 exit_server("attempt to defer a deferred request");
1318 }
1319 }
1320
1321 /* End paranoia check */
1322
1323 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1324 "open entry for mid %llu\n",
1325 (unsigned int)request_time.tv_sec,
1326 (unsigned int)request_time.tv_usec,
1327 (unsigned long long)req->mid));
1328
1329 if (!push_deferred_open_message_smb(req, request_time, timeout,
1330 state->id, (char *)state, sizeof(*state))) {
1331 exit_server("push_deferred_open_message_smb failed");
1332 }
1333 add_deferred_open(lck, req->mid, request_time,
1334 messaging_server_id(req->sconn->msg_ctx), state->id);
1335 }
1336
1337
1338 /****************************************************************************
1339 On overwrite open ensure that the attributes match.
1340 ****************************************************************************/
1341
1342 bool open_match_attributes(connection_struct *conn,
1343 uint32 old_dos_attr,
1344 uint32 new_dos_attr,
1345 mode_t existing_unx_mode,
1346 mode_t new_unx_mode,
1347 mode_t *returned_unx_mode)
1348 {
1349 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1350
1351 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1352 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1353
1354 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1355 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1356 *returned_unx_mode = new_unx_mode;
1357 } else {
1358 *returned_unx_mode = (mode_t)0;
1359 }
1360
1361 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1362 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1363 "returned_unx_mode = 0%o\n",
1364 (unsigned int)old_dos_attr,
1365 (unsigned int)existing_unx_mode,
1366 (unsigned int)new_dos_attr,
1367 (unsigned int)*returned_unx_mode ));
1368
1369 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1370 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1371 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1372 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1373 return False;
1374 }
1375 }
1376 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1377 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1378 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1379 return False;
1380 }
1381 }
1382 return True;
1383 }
1384
1385 /****************************************************************************
1386 Special FCB or DOS processing in the case of a sharing violation.
1387 Try and find a duplicated file handle.
1388 ****************************************************************************/
1389
1390 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1391 connection_struct *conn,
1392 files_struct *fsp_to_dup_into,
1393 const struct smb_filename *smb_fname,
1394 struct file_id id,
1395 uint16 file_pid,
1396 uint16 vuid,
1397 uint32 access_mask,
1398 uint32 share_access,
1399 uint32 create_options)
1400 {
1401 files_struct *fsp;
1402
1403 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1404 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1405
1406 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1407 fsp = file_find_di_next(fsp)) {
1408
1409 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1410 "vuid = %u, file_pid = %u, private_options = 0x%x "
1411 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1412 fsp->fh->fd, (unsigned int)fsp->vuid,
1413 (unsigned int)fsp->file_pid,
1414 (unsigned int)fsp->fh->private_options,
1415 (unsigned int)fsp->access_mask ));
1416
1417 if (fsp->fh->fd != -1 &&
1418 fsp->vuid == vuid &&
1419 fsp->file_pid == file_pid &&
1420 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1421 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1422 (fsp->access_mask & FILE_WRITE_DATA) &&
1423 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1424 strequal(fsp->fsp_name->stream_name,
1425 smb_fname->stream_name)) {
1426 DEBUG(10,("fcb_or_dos_open: file match\n"));
1427 break;
1428 }
1429 }
1430
1431 if (!fsp) {
1432 return NT_STATUS_NOT_FOUND;
1433 }
1434
1435 /* quite an insane set of semantics ... */
1436 if (is_executable(smb_fname->base_name) &&
1437 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1438 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1439 return NT_STATUS_INVALID_PARAMETER;
1440 }
1441
1442 /* We need to duplicate this fsp. */
1443 return dup_file_fsp(req, fsp, access_mask, share_access,
1444 create_options, fsp_to_dup_into);
1445 }
1446
1447 static void schedule_defer_open(struct share_mode_lock *lck,
1448 struct timeval request_time,
1449 struct smb_request *req)
1450 {
1451 struct deferred_open_record state;
1452
1453 /* This is a relative time, added to the absolute
1454 request_time value to get the absolute timeout time.
1455 Note that if this is the second or greater time we enter
1456 this codepath for this particular request mid then
1457 request_time is left as the absolute time of the *first*
1458 time this request mid was processed. This is what allows
1459 the request to eventually time out. */
1460
1461 struct timeval timeout;
1462
1463 /* Normally the smbd we asked should respond within
1464 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1465 * the client did, give twice the timeout as a safety
1466 * measure here in case the other smbd is stuck
1467 * somewhere else. */
1468
1469 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1470
1471 /* Nothing actually uses state.delayed_for_oplocks
1472 but it's handy to differentiate in debug messages
1473 between a 30 second delay due to oplock break, and
1474 a 1 second delay for share mode conflicts. */
1475
1476 state.delayed_for_oplocks = True;
1477 state.id = lck->data->id;
1478
1479 if (!request_timed_out(request_time, timeout)) {
1480 defer_open(lck, request_time, timeout, req, &state);
1481 }
1482 }
1483
1484 /****************************************************************************
1485 Work out what access_mask to use from what the client sent us.
1486 ****************************************************************************/
1487
1488 static NTSTATUS smbd_calculate_maximum_allowed_access(
1489 connection_struct *conn,
1490 const struct smb_filename *smb_fname,
1491 uint32_t *p_access_mask)
1492 {
1493 struct security_descriptor *sd;
1494 uint32_t access_granted;
1495 NTSTATUS status;
1496
1497 if (get_current_uid(conn) == (uid_t)0) {
1498 *p_access_mask |= FILE_GENERIC_ALL;
1499 return NT_STATUS_OK;
1500 }
1501
1502 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1503 (SECINFO_OWNER |
1504 SECINFO_GROUP |
1505 SECINFO_DACL),&sd);
1506
1507 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1508 /*
1509 * File did not exist
1510 */
1511 *p_access_mask = FILE_GENERIC_ALL;
1512 return NT_STATUS_OK;
1513 }
1514 if (!NT_STATUS_IS_OK(status)) {
1515 DEBUG(10,("smbd_calculate_access_mask: "
1516 "Could not get acl on file %s: %s\n",
1517 smb_fname_str_dbg(smb_fname),
1518 nt_errstr(status)));
1519 return NT_STATUS_ACCESS_DENIED;
1520 }
1521
1522 /*
1523 * Never test FILE_READ_ATTRIBUTES. se_access_check()
1524 * also takes care of owner WRITE_DAC and READ_CONTROL.
1525 */
1526 status = se_access_check(sd,
1527 get_current_nttok(conn),
1528 (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1529 &access_granted);
1530
1531 TALLOC_FREE(sd);
1532
1533 if (!NT_STATUS_IS_OK(status)) {
1534 DEBUG(10, ("smbd_calculate_access_mask: "
1535 "Access denied on file %s: "
1536 "when calculating maximum access\n",
1537 smb_fname_str_dbg(smb_fname)));
1538 return NT_STATUS_ACCESS_DENIED;
1539 }
1540 *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1541 return NT_STATUS_OK;
1542 }
1543
1544 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1545 const struct smb_filename *smb_fname,
1546 uint32_t access_mask,
1547 uint32_t *access_mask_out)
1548 {
1549 NTSTATUS status;
1550 uint32_t orig_access_mask = access_mask;
1551 uint32_t rejected_share_access;
1552
1553 /*
1554 * Convert GENERIC bits to specific bits.
1555 */
1556
1557 se_map_generic(&access_mask, &file_generic_mapping);
1558
1559 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1560 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1561
1562 status = smbd_calculate_maximum_allowed_access(
1563 conn, smb_fname, &access_mask);
1564
1565 if (!NT_STATUS_IS_OK(status)) {
1566 return status;
1567 }
1568
1569 access_mask &= conn->share_access;
1570 }
1571
1572 rejected_share_access = access_mask & ~(conn->share_access);
1573
1574 if (rejected_share_access) {
1575 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1576 "file %s: rejected by share access mask[0x%08X] "
1577 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1578 smb_fname_str_dbg(smb_fname),
1579 conn->share_access,
1580 orig_access_mask, access_mask,
1581 rejected_share_access));
1582 return NT_STATUS_ACCESS_DENIED;
1583 }
1584
1585 *access_mask_out = access_mask;
1586 return NT_STATUS_OK;
1587 }
1588
1589 /****************************************************************************
1590 Remove the deferred open entry under lock.
1591 ****************************************************************************/
1592
1593 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1594 struct server_id pid)
1595 {
1596 struct share_mode_lock *lck = get_existing_share_mode_lock(
1597 talloc_tos(), id);
1598 if (lck == NULL) {
1599 DEBUG(0, ("could not get share mode lock\n"));
1600 return;
1601 }
1602 del_deferred_open_entry(lck, mid, pid);
1603 TALLOC_FREE(lck);
1604 }
1605
1606 /****************************************************************************
1607 Open a file with a share mode. Passed in an already created files_struct *.
1608 ****************************************************************************/
1609
1610 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1611 struct smb_request *req,
1612 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1613 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1614 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1615 uint32 create_options, /* options such as delete on close. */
1616 uint32 new_dos_attributes, /* attributes used for new file. */
1617 int oplock_request, /* internal Samba oplock codes. */
1618 /* Information (FILE_EXISTS etc.) */
1619 uint32_t private_flags, /* Samba specific flags. */
1620 int *pinfo,
1621 files_struct *fsp)
1622 {
1623 struct smb_filename *smb_fname = fsp->fsp_name;
1624 int flags=0;
1625 int flags2=0;
1626 bool file_existed = VALID_STAT(smb_fname->st);
1627 bool def_acl = False;
1628 bool posix_open = False;
1629 bool new_file_created = False;
1630 bool clear_ads = false;
1631 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1632 mode_t new_unx_mode = (mode_t)0;
1633 mode_t unx_mode = (mode_t)0;
1634 int info;
1635 uint32 existing_dos_attributes = 0;
1636 struct timeval request_time = timeval_zero();
1637 struct share_mode_lock *lck = NULL;
1638 uint32 open_access_mask = access_mask;
1639 NTSTATUS status;
1640 char *parent_dir;
1641
1642 if (conn->printer) {
1643 /*
1644 * Printers are handled completely differently.
1645 * Most of the passed parameters are ignored.
1646 */
1647
1648 if (pinfo) {
1649 *pinfo = FILE_WAS_CREATED;
1650 }
1651
1652 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1653 smb_fname_str_dbg(smb_fname)));
1654
1655 if (!req) {
1656 DEBUG(0,("open_file_ntcreate: printer open without "
1657 "an SMB request!\n"));
1658 return NT_STATUS_INTERNAL_ERROR;
1659 }
1660
1661 return print_spool_open(fsp, smb_fname->base_name,
1662 req->vuid);
1663 }
1664
1665 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1666 NULL)) {
1667 return NT_STATUS_NO_MEMORY;
1668 }
1669
1670 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1671 posix_open = True;
1672 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1673 new_dos_attributes = 0;
1674 } else {
1675 /* Windows allows a new file to be created and
1676 silently removes a FILE_ATTRIBUTE_DIRECTORY
1677 sent by the client. Do the same. */
1678
1679 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1680
1681 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1682 * created new. */
1683 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1684 smb_fname, parent_dir);
1685 }
1686
1687 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1688 "access_mask=0x%x share_access=0x%x "
1689 "create_disposition = 0x%x create_options=0x%x "
1690 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1691 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1692 access_mask, share_access, create_disposition,
1693 create_options, (unsigned int)unx_mode, oplock_request,
1694 (unsigned int)private_flags));
1695
1696 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1697 DEBUG(0, ("No smb request but not an internal only open!\n"));
1698 return NT_STATUS_INTERNAL_ERROR;
1699 }
1700
1701 /*
1702 * Only non-internal opens can be deferred at all
1703 */
1704
1705 if (req) {
1706 void *ptr;
1707 if (get_deferred_open_message_state(req,
1708 &request_time,
1709 &ptr)) {
1710
1711 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1712 /* Remember the absolute time of the original
1713 request with this mid. We'll use it later to
1714 see if this has timed out. */
1715
1716 /* Remove the deferred open entry under lock. */
1717 remove_deferred_open_entry(
1718 state->id, req->mid,
1719 messaging_server_id(req->sconn->msg_ctx));
1720
1721 /* Ensure we don't reprocess this message. */
1722 remove_deferred_open_message_smb(req->sconn, req->mid);
1723 }
1724 }
1725
1726 if (!posix_open) {
1727 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1728 if (file_existed) {
1729 existing_dos_attributes = dos_mode(conn, smb_fname);
1730 }
1731 }
1732
1733 /* ignore any oplock requests if oplocks are disabled */
1734 if (!lp_oplocks(SNUM(conn)) ||
1735 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1736 /* Mask off everything except the private Samba bits. */
1737 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1738 }
1739
1740 /* this is for OS/2 long file names - say we don't support them */
1741 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1742 /* OS/2 Workplace shell fix may be main code stream in a later
1743 * release. */
1744 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1745 "supported.\n"));
1746 if (use_nt_status()) {
1747 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1748 }
1749 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1750 }
1751
1752 switch( create_disposition ) {
1753 /*
1754 * Currently we're using FILE_SUPERSEDE as the same as
1755 * FILE_OVERWRITE_IF but they really are
1756 * different. FILE_SUPERSEDE deletes an existing file
1757 * (requiring delete access) then recreates it.
1758 */
1759 case FILE_SUPERSEDE:
1760 /* If file exists replace/overwrite. If file doesn't
1761 * exist create. */
1762 flags2 |= (O_CREAT | O_TRUNC);
1763 clear_ads = true;
1764 break;
1765
1766 case FILE_OVERWRITE_IF:
1767 /* If file exists replace/overwrite. If file doesn't
1768 * exist create. */
1769 flags2 |= (O_CREAT | O_TRUNC);
1770 clear_ads = true;
1771 break;
1772
1773 case FILE_OPEN:
1774 /* If file exists open. If file doesn't exist error. */
1775 if (!file_existed) {
1776 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1777 "requested for file %s and file "
1778 "doesn't exist.\n",
1779 smb_fname_str_dbg(smb_fname)));
1780 errno = ENOENT;
1781 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1782 }
1783 break;
1784
1785 case FILE_OVERWRITE:
1786 /* If file exists overwrite. If file doesn't exist
1787 * error. */
1788 if (!file_existed) {
1789 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1790 "requested for file %s and file "
1791 "doesn't exist.\n",
1792 smb_fname_str_dbg(smb_fname) ));
1793 errno = ENOENT;
1794 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1795 }
1796 flags2 |= O_TRUNC;
1797 clear_ads = true;
1798 break;
1799
1800 case FILE_CREATE:
1801 /* If file exists error. If file doesn't exist
1802 * create. */
1803 if (file_existed) {
1804 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1805 "requested for file %s and file "
1806 "already exists.\n",
1807 smb_fname_str_dbg(smb_fname)));
1808 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1809 errno = EISDIR;
1810 } else {
1811 errno = EEXIST;
1812 }
1813 return map_nt_error_from_unix(errno);
1814 }
1815 flags2 |= (O_CREAT|O_EXCL);
1816 break;
1817
1818 case FILE_OPEN_IF:
1819 /* If file exists open. If file doesn't exist
1820 * create. */
1821 flags2 |= O_CREAT;
1822 break;
1823
1824 default:
1825 return NT_STATUS_INVALID_PARAMETER;
1826 }
1827
1828 /* We only care about matching attributes on file exists and
1829 * overwrite. */
1830
1831 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1832 (create_disposition == FILE_OVERWRITE_IF))) {
1833 if (!open_match_attributes(conn, existing_dos_attributes,
1834 new_dos_attributes,
1835 smb_fname->st.st_ex_mode,
1836 unx_mode, &new_unx_mode)) {
1837 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1838 "for file %s (%x %x) (0%o, 0%o)\n",
1839 smb_fname_str_dbg(smb_fname),
1840 existing_dos_attributes,
1841 new_dos_attributes,
1842 (unsigned int)smb_fname->st.st_ex_mode,
1843 (unsigned int)unx_mode ));
1844 errno = EACCES;
1845 return NT_STATUS_ACCESS_DENIED;
1846 }
1847 }
1848
1849 status = smbd_calculate_access_mask(conn, smb_fname,
1850 access_mask,
1851 &access_mask);
1852 if (!NT_STATUS_IS_OK(status)) {
1853 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1854 "on file %s returned %s\n",
1855 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1856 return status;
1857 }
1858
1859 open_access_mask = access_mask;
1860
1861 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1862 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1863 }
1864
1865 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1866 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1867 access_mask));
1868
1869 /*
1870 * Note that we ignore the append flag as append does not
1871 * mean the same thing under DOS and Unix.
1872 */
1873
1874 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1875 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1876 /* DENY_DOS opens are always underlying read-write on the
1877 file handle, no matter what the requested access mask
1878 says. */
1879 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1880 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1881 flags = O_RDWR;
1882 } else {
1883 flags = O_WRONLY;
1884 }
1885 } else {
1886 flags = O_RDONLY;
1887 }
1888
1889 /*
1890 * Currently we only look at FILE_WRITE_THROUGH for create options.
1891 */
1892
1893 #if defined(O_SYNC)
1894 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1895 flags2 |= O_SYNC;
1896 }
1897 #endif /* O_SYNC */
1898
1899 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1900 flags2 |= O_APPEND;
1901 }
1902
1903 if (!posix_open && !CAN_WRITE(conn)) {
1904 /*
1905 * We should really return a permission denied error if either
1906 * O_CREAT or O_TRUNC are set, but for compatibility with
1907 * older versions of Samba we just AND them out.
1908 */
1909 flags2 &= ~(O_CREAT|O_TRUNC);
1910 }
1911
1912 /*
1913 * Ensure we can't write on a read-only share or file.
1914 */
1915
1916 if (flags != O_RDONLY && file_existed &&
1917 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1918 DEBUG(5,("open_file_ntcreate: write access requested for "
1919 "file %s on read only %s\n",
1920 smb_fname_str_dbg(smb_fname),
1921 !CAN_WRITE(conn) ? "share" : "file" ));
1922 errno = EACCES;
1923 return NT_STATUS_ACCESS_DENIED;
1924 }
1925
1926 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1927 fsp->share_access = share_access;
1928 fsp->fh->private_options = private_flags;
1929 fsp->access_mask = open_access_mask; /* We change this to the
1930 * requested access_mask after
1931 * the open is done. */
1932 fsp->posix_open = posix_open;
1933
1934 /* Ensure no SAMBA_PRIVATE bits can be set. */
1935 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1936
1937 if (timeval_is_zero(&request_time)) {
1938 request_time = fsp->open_time;
1939 }
1940
1941 if (file_existed) {
1942 struct share_mode_entry *batch_entry = NULL;
1943 struct share_mode_entry *exclusive_entry = NULL;
1944 bool got_level2_oplock = false;
1945 bool got_a_none_oplock = false;
1946 struct file_id id;
1947
1948 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1949 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1950
1951 lck = get_share_mode_lock(talloc_tos(), id,
1952 conn->connectpath,
1953 smb_fname, &old_write_time);
1954 if (lck == NULL) {
1955 DEBUG(0, ("Could not get share mode lock\n"));
1956 return NT_STATUS_SHARING_VIOLATION;
1957 }
1958
1959 /* Get the types we need to examine. */
1960 find_oplock_types(fsp,
1961 oplock_request,
1962 lck,
1963 &batch_entry,
1964 &exclusive_entry,
1965 &got_level2_oplock,
1966 &got_a_none_oplock);
1967
1968 /* First pass - send break only on batch oplocks. */
1969 if ((req != NULL) &&
1970 delay_for_batch_oplocks(fsp,
1971 req->mid,
1972 oplock_request,
1973 batch_entry)) {
1974 schedule_defer_open(lck, request_time, req);
1975 TALLOC_FREE(lck);
1976 return NT_STATUS_SHARING_VIOLATION;
1977 }
1978
1979 /* Use the client requested access mask here, not the one we
1980 * open with. */
1981 status = open_mode_check(conn, lck, fsp->name_hash,
1982 access_mask, share_access,
1983 create_options, &file_existed);
1984
1985 if (NT_STATUS_IS_OK(status)) {
1986 /* We might be going to allow this open. Check oplock
1987 * status again. */
1988 /* Second pass - send break for both batch or
1989 * exclusive oplocks. */
1990 if ((req != NULL) &&
1991 delay_for_exclusive_oplocks(
1992 fsp,
1993 req->mid,
1994 oplock_request,
1995 exclusive_entry)) {
1996 schedule_defer_open(lck, request_time, req);
1997 TALLOC_FREE(lck);
1998 return NT_STATUS_SHARING_VIOLATION;
1999 }
2000 }
2001
2002 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2003 /* DELETE_PENDING is not deferred for a second */
2004 TALLOC_FREE(lck);
2005 return status;
2006 }
2007
2008 grant_fsp_oplock_type(fsp,
2009 oplock_request,
2010 got_level2_oplock,
2011 got_a_none_oplock);
2012
2013 if (!NT_STATUS_IS_OK(status)) {
2014 uint32 can_access_mask;
2015 bool can_access = True;
2016
2017 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2018
2019 /* Check if this can be done with the deny_dos and fcb
2020 * calls. */
2021 if (private_flags &
2022 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2023 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2024 if (req == NULL) {
2025 DEBUG(0, ("DOS open without an SMB "
2026 "request!\n"));
2027 TALLOC_FREE(lck);
2028 return NT_STATUS_INTERNAL_ERROR;
2029 }
2030
2031 /* Use the client requested access mask here,
2032 * not the one we open with. */
2033 status = fcb_or_dos_open(req,
2034 conn,
2035 fsp,
2036 smb_fname,
2037 id,
2038 req->smbpid,
2039 req->vuid,
2040 access_mask,
2041 share_access,
2042 create_options);
2043
2044 if (NT_STATUS_IS_OK(status)) {
2045 TALLOC_FREE(lck);
2046 if (pinfo) {
2047 *pinfo = FILE_WAS_OPENED;
2048 }
2049 return NT_STATUS_OK;
2050 }
2051 }
2052
2053 /*
2054 * This next line is a subtlety we need for
2055 * MS-Access. If a file open will fail due to share
2056 * permissions and also for security (access) reasons,
2057 * we need to return the access failed error, not the
2058 * share error. We can't open the file due to kernel
2059 * oplock deadlock (it's possible we failed above on
2060 * the open_mode_check()) so use a userspace check.
2061 */
2062
2063 if (flags & O_RDWR) {
2064 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2065 } else if (flags & O_WRONLY) {
2066 can_access_mask = FILE_WRITE_DATA;
2067 } else {
2068 can_access_mask = FILE_READ_DATA;
2069 }
2070
2071 if (((can_access_mask & FILE_WRITE_DATA) &&
2072 !CAN_WRITE(conn)) ||
2073 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2074 smb_fname, can_access_mask))) {
2075 can_access = False;
2076 }
2077
2078 /*
2079 * If we're returning a share violation, ensure we
2080 * cope with the braindead 1 second delay.
2081 */
2082
2083 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2084 lp_defer_sharing_violations()) {
2085 struct timeval timeout;
2086 struct deferred_open_record state;
2087 int timeout_usecs;
2088
2089 /* this is a hack to speed up torture tests
2090 in 'make test' */
2091 timeout_usecs = lp_parm_int(SNUM(conn),
2092 "smbd","sharedelay",
2093 SHARING_VIOLATION_USEC_WAIT);
2094
2095 /* This is a relative time, added to the absolute
2096 request_time value to get the absolute timeout time.
2097 Note that if this is the second or greater time we enter
2098 this codepath for this particular request mid then
2099 request_time is left as the absolute time of the *first*
2100 time this request mid was processed. This is what allows
2101 the request to eventually time out. */
2102
2103 timeout = timeval_set(0, timeout_usecs);
2104
2105 /* Nothing actually uses state.delayed_for_oplocks
2106 but it's handy to differentiate in debug messages
2107 between a 30 second delay due to oplock break, and
2108 a 1 second delay for share mode conflicts. */
2109
2110 state.delayed_for_oplocks = False;
2111 state.id = id;
2112
2113 if ((req != NULL)
2114 && !request_timed_out(request_time,
2115 timeout)) {
2116 defer_open(lck, request_time, timeout,
2117 req, &state);
2118 }
2119 }
2120
2121 TALLOC_FREE(lck);
2122 if (can_access) {
2123 /*
2124 * We have detected a sharing violation here
2125 * so return the correct error code
2126 */
2127 status = NT_STATUS_SHARING_VIOLATION;
2128 } else {
2129 status = NT_STATUS_ACCESS_DENIED;
2130 }
2131 return status;
2132 }
2133
2134 /*
2135 * We exit this block with the share entry *locked*.....
2136 */
2137 }
2138
2139 SMB_ASSERT(!file_existed || (lck != NULL));
2140
2141 /*
2142 * Ensure we pay attention to default ACLs on directories if required.
2143 */
2144
2145 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2146 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2147 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2148 }
2149
2150 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2151 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2152 (unsigned int)flags, (unsigned int)flags2,
2153 (unsigned int)unx_mode, (unsigned int)access_mask,
2154 (unsigned int)open_access_mask));
2155
2156 /*
2157 * open_file strips any O_TRUNC flags itself.
2158 */
2159
2160 fsp_open = open_file(fsp, conn, req, parent_dir,
2161 flags|flags2, unx_mode, access_mask,
2162 open_access_mask);
2163
2164 if (!NT_STATUS_IS_OK(fsp_open)) {
2165 TALLOC_FREE(lck);
2166 return fsp_open;
2167 }
2168
2169 if (!file_existed) {
2170 struct share_mode_entry *batch_entry = NULL;
2171 struct share_mode_entry *exclusive_entry = NULL;
2172 bool got_level2_oplock = false;
2173 bool got_a_none_oplock = false;
2174 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2175 struct file_id id;
2176 /*
2177 * Deal with the race condition where two smbd's detect the
2178 * file doesn't exist and do the create at the same time. One
2179 * of them will win and set a share mode, the other (ie. this
2180 * one) should check if the requested share mode for this
2181 * create is allowed.
2182 */
2183
2184 /*
2185 * Now the file exists and fsp is successfully opened,
2186 * fsp->dev and fsp->inode are valid and should replace the
2187 * dev=0,inode=0 from a non existent file. Spotted by
2188 * Nadav Danieli <nadavd@exanet.com>. JRA.
2189 */
2190
2191 id = fsp->file_id;
2192
2193 lck = get_share_mode_lock(talloc_tos(), id,
2194 conn->connectpath,
2195 smb_fname, &old_write_time);
2196
2197 if (lck == NULL) {
2198 DEBUG(0, ("open_file_ntcreate: Could not get share "
2199 "mode lock for %s\n",
2200 smb_fname_str_dbg(smb_fname)));
2201 fd_close(fsp);
2202 return NT_STATUS_SHARING_VIOLATION;
2203 }
2204
2205 /* Get the types we need to examine. */
2206 find_oplock_types(fsp,
2207 oplock_request,
2208 lck,
2209 &batch_entry,
2210 &exclusive_entry,
2211 &got_level2_oplock,
2212 &got_a_none_oplock);
2213
2214 /* First pass - send break only on batch oplocks. */
2215 if ((req != NULL) &&
2216 delay_for_batch_oplocks(fsp,
2217 req->mid,
2218 oplock_request,
2219 batch_entry)) {
2220 schedule_defer_open(lck, request_time, req);
2221 TALLOC_FREE(lck);
2222 fd_close(fsp);
2223 return NT_STATUS_SHARING_VIOLATION;
2224 }
2225
2226 status = open_mode_check(conn, lck, fsp->name_hash,
2227 access_mask, share_access,
2228 create_options, &file_existed);
2229
2230 if (NT_STATUS_IS_OK(status)) {
2231 /* We might be going to allow this open. Check oplock
2232 * status again. */
2233 /* Second pass - send break for both batch or
2234 * exclusive oplocks. */
2235 if ((req != NULL) &&
2236 delay_for_exclusive_oplocks(
2237 fsp,
2238 req->mid,
2239 oplock_request,
2240 exclusive_entry)) {
2241 schedule_defer_open(lck, request_time, req);
2242 TALLOC_FREE(lck);
2243 fd_close(fsp);
2244 return NT_STATUS_SHARING_VIOLATION;
2245 }
2246 }
2247
2248 if (!NT_STATUS_IS_OK(status)) {
2249 struct deferred_open_record state;
2250
2251 state.delayed_for_oplocks = False;
2252 state.id = id;
2253
2254 /* Do it all over again immediately. In the second
2255 * round we will find that the file existed and handle
2256 * the DELETE_PENDING and FCB cases correctly. No need
2257 * to duplicate the code here. Essentially this is a
2258 * "goto top of this function", but don't tell
2259 * anybody... */
2260
2261 if (req != NULL) {
2262 defer_open(lck, request_time, timeval_zero(),
2263 req, &state);
2264 }
2265 TALLOC_FREE(lck);
2266 fd_close(fsp);
2267 return status;
2268 }
2269
2270 grant_fsp_oplock_type(fsp,
2271 oplock_request,
2272 got_level2_oplock,
2273 got_a_none_oplock);
2274
2275 /*
2276 * We exit this block with the share entry *locked*.....
2277 */
2278
2279 }
2280
2281 SMB_ASSERT(lck != NULL);
2282
2283 /* Delete streams if create_disposition requires it */
2284 if (file_existed && clear_ads &&
2285 !is_ntfs_stream_smb_fname(smb_fname)) {
2286 status = delete_all_streams(conn, smb_fname->base_name);
2287 if (!NT_STATUS_IS_OK(status)) {
2288 TALLOC_FREE(lck);
2289 fd_close(fsp);
2290 return status;
2291 }
2292 }
2293
2294 /* note that we ignore failure for the following. It is
2295 basically a hack for NFS, and NFS will never set one of
2296 these only read them. Nobody but Samba can ever set a deny
2297 mode and we have already checked our more authoritative
2298 locking database for permission to set this deny mode. If
2299 the kernel refuses the operations then the kernel is wrong.
2300 note that GPFS supports it as well - jmcd */
2301
2302 if (fsp->fh->fd != -1) {
2303 int ret_flock;
2304 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2305 if(ret_flock == -1 ){
2306
2307 TALLOC_FREE(lck);
2308 fd_close(fsp);
2309
2310 return NT_STATUS_SHARING_VIOLATION;
2311 }
2312 }
2313
2314 /*
2315 * At this point onwards, we can guarentee that the share entry
2316 * is locked, whether we created the file or not, and that the
2317 * deny mode is compatible with all current opens.
2318 */
2319
2320 /*
2321 * If requested, truncate the file.
2322 */
2323
2324 if (file_existed && (flags2&O_TRUNC)) {
2325 /*
2326 * We are modifing the file after open - update the stat
2327 * struct..
2328 */
2329 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2330 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2331 status = map_nt_error_from_unix(errno);
2332 TALLOC_FREE(lck);
2333 fd_close(fsp);
2334 return status;
2335 }
2336 }
2337
2338 /*
2339 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2340 * but we don't have to store this - just ignore it on access check.
2341 */
2342 if (conn->sconn->using_smb2) {
2343 /*
2344 * SMB2 doesn't return it (according to Microsoft tests).
2345 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2346 * File created with access = 0x7 (Read, Write, Delete)
2347 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2348 */
2349 fsp->access_mask = access_mask;
2350 } else {
2351 /* But SMB1 does. */
2352 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2353 }
2354
2355 if (file_existed) {
2356 /* stat opens on existing files don't get oplocks. */
2357 if (is_stat_open(open_access_mask)) {
2358 fsp->oplock_type = NO_OPLOCK;
2359 }
2360
2361 if (flags2 & O_TRUNC) {
2362 info = FILE_WAS_OVERWRITTEN;
2363 } else {
2364 info = FILE_WAS_OPENED;
2365 }
2366 } else {
2367 info = FILE_WAS_CREATED;
2368 }
2369
2370 if (pinfo) {
2371 *pinfo = info;
2372 }
2373
2374 /*
2375 * Setup the oplock info in both the shared memory and
2376 * file structs.
2377 */
2378
2379 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2380 /*
2381 * Could not get the kernel oplock or there are byte-range
2382 * locks on the file.
2383 */
2384 fsp->oplock_type = NO_OPLOCK;
2385 }
2386
2387 set_share_mode(lck, fsp, get_current_uid(conn),
2388 req ? req->mid : 0,
2389 fsp->oplock_type);
2390
2391 /* Handle strange delete on close create semantics. */
2392 if (create_options & FILE_DELETE_ON_CLOSE) {
2393
2394 status = can_set_delete_on_close(fsp, new_dos_attributes);
2395
2396 if (!NT_STATUS_IS_OK(status)) {
2397 /* Remember to delete the mode we just added. */
2398 del_share_mode(lck, fsp);
2399 TALLOC_FREE(lck);
2400 fd_close(fsp);
2401 return status;
2402 }
2403 /* Note that here we set the *inital* delete on close flag,
2404 not the regular one. The magic gets handled in close. */
2405 fsp->initial_delete_on_close = True;
2406 }
2407
2408 if (info == FILE_WAS_OVERWRITTEN
2409 || info == FILE_WAS_CREATED
2410 || info == FILE_WAS_SUPERSEDED) {
2411 new_file_created = True;
2412 }
2413
2414 if (new_file_created) {
2415 /* Files should be initially set as archive */
2416 if (lp_map_archive(SNUM(conn)) ||
2417 lp_store_dos_attributes(SNUM(conn))) {
2418 if (!posix_open) {
2419 if (file_set_dosmode(conn, smb_fname,
2420 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2421 parent_dir, true) == 0) {
2422 unx_mode = smb_fname->st.st_ex_mode;
2423 }
2424 }
2425 }
2426 }
2427
2428 /* Determine sparse flag. */
2429 if (posix_open) {
2430 /* POSIX opens are sparse by default. */
2431 fsp->is_sparse = true;
2432 } else {
2433 fsp->is_sparse = (file_existed &&
2434 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2435 }
2436
2437 /*
2438 * Take care of inherited ACLs on created files - if default ACL not
2439 * selected.
2440 */
2441
2442 if (!posix_open && !file_existed && !def_acl) {
2443
2444 int saved_errno = errno; /* We might get ENOSYS in the next
2445 * call.. */
2446
2447 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2448 errno == ENOSYS) {
2449 errno = saved_errno; /* Ignore ENOSYS */
2450 }
2451
2452 } else if (new_unx_mode) {
2453
2454 int ret = -1;
2455
2456 /* Attributes need changing. File already existed. */
2457
2458 {
2459 int saved_errno = errno; /* We might get ENOSYS in the
2460 * next call.. */
2461 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2462
2463 if (ret == -1 && errno == ENOSYS) {
2464 errno = saved_errno; /* Ignore ENOSYS */
2465 } else {
2466 DEBUG(5, ("open_file_ntcreate: reset "
2467 "attributes of file %s to 0%o\n",
2468 smb_fname_str_dbg(smb_fname),
2469 (unsigned int)new_unx_mode));
2470 ret = 0; /* Don't do the fchmod below. */
2471 }
2472 }
2473
2474 if ((ret == -1) &&
2475 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2476 DEBUG(5, ("open_file_ntcreate: failed to reset "
2477 "attributes of file %s to 0%o\n",
2478 smb_fname_str_dbg(smb_fname),
2479 (unsigned int)new_unx_mode));
2480 }
2481
2482 /* If this is a successful open, we must remove any deferred open
2483 * records. */
2484 if (req != NULL) {
2485 del_deferred_open_entry(lck, req->mid,
2486 messaging_server_id(req->sconn->msg_ctx));
2487 }
2488 TALLOC_FREE(lck);
2489
2490 return NT_STATUS_OK;
2491 }
2492
2493
2494 /****************************************************************************
2495 Open a file for for write to ensure that we can fchmod it.
2496 ****************************************************************************/
2497
2498 NTSTATUS open_file_fchmod(connection_struct *conn,
2499 struct smb_filename *smb_fname,
2500 files_struct **result)
2501 {
2502 if (!VALID_STAT(smb_fname->st)) {
2503 return NT_STATUS_INVALID_PARAMETER;
2504 }
2505
2506 return SMB_VFS_CREATE_FILE(
2507 conn, /* conn */
2508 NULL, /* req */
2509 0, /* root_dir_fid */
2510 smb_fname, /* fname */
2511 FILE_WRITE_DATA, /* access_mask */
2512 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2513 FILE_SHARE_DELETE),
2514 FILE_OPEN, /* create_disposition*/
2515 0, /* create_options */
2516 0, /* file_attributes */
2517 INTERNAL_OPEN_ONLY, /* oplock_request */
2518 0, /* allocation_size */
2519 0, /* private_flags */
2520 NULL, /* sd */
2521 NULL, /* ea_list */
2522 result, /* result */
2523 NULL); /* pinfo */
2524 }
2525
2526 static NTSTATUS mkdir_internal(connection_struct *conn,
2527 struct smb_filename *smb_dname,
2528 uint32 file_attributes)
2529 {
2530 mode_t mode;
2531 char *parent_dir = NULL;
2532 NTSTATUS status;
2533 bool posix_open = false;
2534 bool need_re_stat = false;
2535 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2536
2537 if(access_mask & ~(conn->share_access)) {
2538 DEBUG(5,("mkdir_internal: failing share access "
2539 "%s\n", lp_servicename(SNUM(conn))));
2540 return NT_STATUS_ACCESS_DENIED;
2541 }
2542
2543 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2544 NULL)) {
2545 return NT_STATUS_NO_MEMORY;
2546 }
2547
2548 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2549 posix_open = true;
2550 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2551 } else {
2552 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2553 }
2554
2555 status = check_parent_access(conn,
2556 smb_dname,
2557 access_mask,
2558 &parent_dir);
2559 if(!NT_STATUS_IS_OK(status)) {
2560 DEBUG(5,("mkdir_internal: check_parent_access "
2561 "on directory %s for path %s returned %s\n",
2562 parent_dir,
2563 smb_dname->base_name,
2564 nt_errstr(status) ));
2565 return status;
2566 }
2567
2568 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2569 return map_nt_error_from_unix(errno);
2570 }
2571
2572 /* Ensure we're checking for a symlink here.... */
2573 /* We don't want to get caught by a symlink racer. */
2574
2575 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2576 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2577 smb_fname_str_dbg(smb_dname), strerror(errno)));
2578 return map_nt_error_from_unix(errno);
2579 }
2580
2581 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2582 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2583 smb_fname_str_dbg(smb_dname)));
2584 return NT_STATUS_NOT_A_DIRECTORY;
2585 }
2586
2587 if (lp_store_dos_attributes(SNUM(conn))) {
2588 if (!posix_open) {
2589 file_set_dosmode(conn, smb_dname,
2590 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2591 parent_dir, true);
2592 }
2593 }
2594
2595 if (lp_inherit_perms(SNUM(conn))) {
2596 inherit_access_posix_acl(conn, parent_dir,
2597 smb_dname->base_name, mode);
2598 need_re_stat = true;
2599 }
2600
2601 if (!posix_open) {
2602 /*
2603 * Check if high bits should have been set,
2604 * then (if bits are missing): add them.
2605 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2606 * dir.
2607 */
2608 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2609 (mode & ~smb_dname->st.st_ex_mode)) {
2610 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2611 (smb_dname->st.st_ex_mode |
2612 (mode & ~smb_dname->st.st_ex_mode)));
2613 need_re_stat = true;
2614 }
2615 }
2616
2617 /* Change the owner if required. */
2618 if (lp_inherit_owner(SNUM(conn))) {
2619 change_dir_owner_to_parent(conn, parent_dir,
2620 smb_dname->base_name,
2621 &smb_dname->st);
2622 need_re_stat = true;
2623 }
2624
2625 if (need_re_stat) {
2626 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2627 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2628 smb_fname_str_dbg(smb_dname), strerror(errno)));
2629 return map_nt_error_from_unix(errno);
2630 }
2631 }
2632
2633 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2634 smb_dname->base_name);
2635
2636 return NT_STATUS_OK;
2637 }
2638
2639 /****************************************************************************
2640 Ensure we didn't get symlink raced on opening a directory.
2641 ****************************************************************************/
2642
2643 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2644 const SMB_STRUCT_STAT *sbuf2)
2645 {
2646 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2647 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2648 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2649 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2650 return false;
2651 }
2652 return true;
2653 }
2654
2655 /****************************************************************************
2656 Open a directory from an NT SMB call.
2657 ****************************************************************************/
2658
2659 static NTSTATUS open_directory(connection_struct *conn,
2660 struct smb_request *req,
2661 struct smb_filename *smb_dname,
2662 uint32 access_mask,
2663 uint32 share_access,
2664 uint32 create_disposition,
2665 uint32 create_options,
2666 uint32 file_attributes,
2667 int *pinfo,
2668 files_struct **result)
2669 {
2670 files_struct *fsp = NULL;
2671 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2672 struct share_mode_lock *lck = NULL;
2673 NTSTATUS status;
2674 struct timespec mtimespec;
2675 int info = 0;
2676
2677 if (is_ntfs_stream_smb_fname(smb_dname)) {
2678 DEBUG(2, ("open_directory: %s is a stream name!\n",
2679 smb_fname_str_dbg(smb_dname)));
2680 return NT_STATUS_NOT_A_DIRECTORY;
2681 }
2682
2683 /* Ensure we have a directory attribute. */
2684 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2685
2686 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2687 "share_access = 0x%x create_options = 0x%x, "
2688 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2689 smb_fname_str_dbg(smb_dname),
2690 (unsigned int)access_mask,
2691 (unsigned int)share_access,
2692 (unsigned int)create_options,
2693 (unsigned int)create_disposition,
2694 (unsigned int)file_attributes));
2695
2696 status = smbd_calculate_access_mask(conn, smb_dname,
2697 access_mask, &access_mask);
2698 if (!NT_STATUS_IS_OK(status)) {
2699 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2700 "on file %s returned %s\n",
2701 smb_fname_str_dbg(smb_dname),
2702 nt_errstr(status)));
2703 return status;
2704 }
2705
2706 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2707 !security_token_has_privilege(get_current_nttok(conn),
2708 SEC_PRIV_SECURITY)) {
2709 DEBUG(10, ("open_directory: open on %s "
2710 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2711 smb_fname_str_dbg(smb_dname)));
2712 return NT_STATUS_PRIVILEGE_NOT_HELD;
2713 }
2714
2715 switch( create_disposition ) {
2716 case FILE_OPEN:
2717
2718 if (!dir_existed) {
2719 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2720 }
2721
2722 info = FILE_WAS_OPENED;
2723 break;
2724
2725 case FILE_CREATE:
2726
2727 /* If directory exists error. If directory doesn't
2728 * exist create. */
2729
2730 if (dir_existed) {
2731 status = NT_STATUS_OBJECT_NAME_COLLISION;
2732 DEBUG(2, ("open_directory: unable to create "
2733 "%s. Error was %s\n",
2734 smb_fname_str_dbg(smb_dname),
2735 nt_errstr(status)));
2736 return status;
2737 }
2738
2739 status = mkdir_internal(conn, smb_dname,
2740 file_attributes);
2741
2742 if (!NT_STATUS_IS_OK(status)) {
2743 DEBUG(2, ("open_directory: unable to create "
2744 "%s. Error was %s\n",
2745 smb_fname_str_dbg(smb_dname),
2746 nt_errstr(status)));
2747 return status;
2748 }
2749
2750 info = FILE_WAS_CREATED;
2751 break;
2752
2753 case FILE_OPEN_IF:
2754 /*
2755 * If directory exists open. If directory doesn't
2756 * exist create.
2757 */
2758
2759 if (dir_existed) {
2760 status = NT_STATUS_OK;
2761 info = FILE_WAS_OPENED;
2762 } else {
2763 status = mkdir_internal(conn, smb_dname,
2764 file_attributes);
2765
2766 if (NT_STATUS_IS_OK(status)) {
2767 info = FILE_WAS_CREATED;
2768 } else {
2769 /* Cope with create race. */
2770 if (!NT_STATUS_EQUAL(status,
2771 NT_STATUS_OBJECT_NAME_COLLISION)) {
2772 DEBUG(2, ("open_directory: unable to create "
2773 "%s. Error was %s\n",
2774 smb_fname_str_dbg(smb_dname),
2775 nt_errstr(status)));
2776 return status;
2777 }
2778 info = FILE_WAS_OPENED;
2779 }
2780 }
2781
2782 break;
2783
2784 case FILE_SUPERSEDE:
2785 case FILE_OVERWRITE:
2786 case FILE_OVERWRITE_IF:
2787 default:
2788 DEBUG(5,("open_directory: invalid create_disposition "
2789 "0x%x for directory %s\n",
2790 (unsigned int)create_disposition,
2791 smb_fname_str_dbg(smb_dname)));
2792 return NT_STATUS_INVALID_PARAMETER;
2793 }
2794
2795 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2796 DEBUG(5,("open_directory: %s is not a directory !\n",
2797 smb_fname_str_dbg(smb_dname)));
2798 return NT_STATUS_NOT_A_DIRECTORY;
2799 }
2800
2801 if (info == FILE_WAS_OPENED) {
2802 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2803 if (!NT_STATUS_IS_OK(status)) {
2804 DEBUG(10, ("open_directory: smbd_check_access_rights on "
2805 "file %s failed with %s\n",
2806 smb_fname_str_dbg(smb_dname),
2807 nt_errstr(status)));
2808 return status;
2809 }
2810 }
2811
2812 status = file_new(req, conn, &fsp);
2813 if(!NT_STATUS_IS_OK(status)) {
2814 return status;
2815 }
2816
2817 /*
2818 * Setup the files_struct for it.
2819 */
2820
2821 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2822 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2823 fsp->file_pid = req ? req->smbpid : 0;
2824 fsp->can_lock = False;
2825 fsp->can_read = False;
2826 fsp->can_write = False;
2827
2828 fsp->share_access = share_access;
2829 fsp->fh->private_options = 0;
2830 /*
2831 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2832 */
2833 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2834 fsp->print_file = NULL;
2835 fsp->modified = False;
2836 fsp->oplock_type = NO_OPLOCK;
2837 fsp->sent_oplock_break = NO_BREAK_SENT;
2838 fsp->is_directory = True;
2839 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2840 status = fsp_set_smb_fname(fsp, smb_dname);
2841 if (!NT_STATUS_IS_OK(status)) {
2842 file_free(req, fsp);
2843 return status;
2844 }
2845
2846 mtimespec = smb_dname->st.st_ex_mtime;
2847
2848 #ifdef O_DIRECTORY
2849 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2850 #else
2851 /* POSIX allows us to open a directory with O_RDONLY. */
2852 status = fd_open(conn, fsp, O_RDONLY, 0);
2853 #endif
2854 if (!NT_STATUS_IS_OK(status)) {
2855 DEBUG(5, ("open_directory: Could not open fd for "
2856 "%s (%s)\n",
2857 smb_fname_str_dbg(smb_dname),
2858 nt_errstr(status)));
2859 file_free(req, fsp);
2860 return status;
2861 }
2862
2863 status = vfs_stat_fsp(fsp);
2864 if (!NT_STATUS_IS_OK(status)) {
2865 fd_close(fsp);
2866 file_free(req, fsp);
2867 return status;
2868 }
2869
2870 /* Ensure there was no race condition. */
2871 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2872 DEBUG(5,("open_directory: stat struct differs for "
2873 "directory %s.\n",
2874 smb_fname_str_dbg(smb_dname)));
2875 fd_close(fsp);
2876 file_free(req, fsp);
2877 return NT_STATUS_ACCESS_DENIED;
2878 }
2879
2880 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2881 conn->connectpath, smb_dname,
2882 &mtimespec);
2883
2884 if (lck == NULL) {
2885 DEBUG(0, ("open_directory: Could not get share mode lock for "
2886 "%s\n", smb_fname_str_dbg(smb_dname)));
2887 fd_close(fsp);
2888 file_free(req, fsp);
2889 return NT_STATUS_SHARING_VIOLATION;
2890 }
2891
2892 status = open_mode_check(conn, lck, fsp->name_hash,
2893 access_mask, share_access,
2894 create_options, &dir_existed);
2895
2896 if (!NT_STATUS_IS_OK(status)) {
2897 TALLOC_FREE(lck);
2898 fd_close(fsp);
2899 file_free(req, fsp);
2900 return status;
2901 }
2902
2903 set_share_mode(lck, fsp, get_current_uid(conn),
2904 req ? req->mid : 0, NO_OPLOCK);
2905
2906 /* For directories the delete on close bit at open time seems
2907 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2908 if (create_options & FILE_DELETE_ON_CLOSE) {
2909 status = can_set_delete_on_close(fsp, 0);
2910 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2911 TALLOC_FREE(lck);
2912 fd_close(fsp);
2913 file_free(req, fsp);
2914 return status;
2915 }
2916
2917 if (NT_STATUS_IS_OK(status)) {
2918 /* Note that here we set the *inital* delete on close flag,
2919 not the regular one. The magic gets handled in close. */
2920 fsp->initial_delete_on_close = True;
2921 }
2922 }
2923
2924 TALLOC_FREE(lck);
2925
2926 if (pinfo) {
2927 *pinfo = info;
2928 }
2929
2930 *result = fsp;
2931 return NT_STATUS_OK;
2932 }
2933
2934 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2935 struct smb_filename *smb_dname)
2936 {
2937 NTSTATUS status;
2938 files_struct *fsp;
2939
2940 status = SMB_VFS_CREATE_FILE(
2941 conn, /* conn */
2942 req, /* req */
2943 0, /* root_dir_fid */
2944 smb_dname, /* fname */
2945 FILE_READ_ATTRIBUTES, /* access_mask */
2946 FILE_SHARE_NONE, /* share_access */
2947 FILE_CREATE, /* create_disposition*/
2948 FILE_DIRECTORY_FILE, /* create_options */
2949 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2950 0, /* oplock_request */
2951 0, /* allocation_size */
2952 0, /* private_flags */
2953 NULL, /* sd */
2954 NULL, /* ea_list */
2955 &fsp, /* result */
2956 NULL); /* pinfo */
2957
2958 if (NT_STATUS_IS_OK(status)) {
2959 close_file(req, fsp, NORMAL_CLOSE);
2960 }
2961
2962 return status;
2963 }
2964
2965 /****************************************************************************
2966 Receive notification that one of our open files has been renamed by another
2967 smbd process.
2968 ****************************************************************************/
2969
2970 void msg_file_was_renamed(struct messaging_context *msg,
2971 void *private_data,
2972 uint32_t msg_type,
2973 struct server_id server_id,
2974 DATA_BLOB *data)
2975 {
2976 files_struct *fsp;
2977 char *frm = (char *)data->data;
2978 struct file_id id;
2979 const char *sharepath;
2980 const char *base_name;
2981 const char *stream_name;
2982 struct smb_filename *smb_fname = NULL;
2983 size_t sp_len, bn_len;
2984 NTSTATUS status;
2985 struct smbd_server_connection *sconn =
2986 talloc_get_type_abort(private_data,
2987 struct smbd_server_connection);
2988
2989 if (data->data == NULL
2990 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2991 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2992 (int)data->length));
2993 return;
2994 }
2995
2996 /* Unpack the message. */
2997 pull_file_id_24(frm, &id);
2998 sharepath = &frm[24];
2999 sp_len = strlen(sharepath);
3000 base_name = sharepath + sp_len + 1;
3001 bn_len = strlen(base_name);
3002 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3003
3004 /* stream_name must always be NULL if there is no stream. */
3005 if (stream_name[0] == '\0') {
3006 stream_name = NULL;
3007 }
3008
3009 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3010 stream_name, NULL, &smb_fname);
3011 if (!NT_STATUS_IS_OK(status)) {
3012 return;
3013 }
3014
3015 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3016 "file_id %s\n",
3017 sharepath, smb_fname_str_dbg(smb_fname),
3018 file_id_string_tos(&id)));
3019
3020 for(fsp = file_find_di_first(sconn, id); fsp;
3021 fsp = file_find_di_next(fsp)) {
3022 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3023
3024 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3025 fsp->fnum, fsp_str_dbg(fsp),
3026 smb_fname_str_dbg(smb_fname)));
3027 status = fsp_set_smb_fname(fsp, smb_fname);
3028 if (!NT_STATUS_IS_OK(status)) {
3029 goto out;
3030 }
3031 } else {
3032 /* TODO. JRA. */
3033 /* Now we have the complete path we can work out if this is
3034 actually within this share and adjust newname accordingly. */
3035 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3036 "not sharepath %s) "
3037 "fnum %d from %s -> %s\n",
3038 fsp->conn->connectpath,
3039 sharepath,
3040 fsp->fnum,
3041 fsp_str_dbg(fsp),
3042 smb_fname_str_dbg(smb_fname)));
3043 }
3044 }
3045 out:
3046 TALLOC_FREE(smb_fname);
3047 return;
3048 }
3049
3050 /*
3051 * If a main file is opened for delete, all streams need to be checked for
3052 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3053 * If that works, delete them all by setting the delete on close and close.
3054 */
3055
3056 NTSTATUS open_streams_for_delete(connection_struct *conn,
3057 const char *fname)
3058 {
3059 struct stream_struct *stream_info = NULL;
3060 files_struct **streams = NULL;
3061 int i;
3062 unsigned int num_streams = 0;
3063 TALLOC_CTX *frame = talloc_stackframe();
3064 NTSTATUS status;
3065
3066 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3067 &num_streams, &stream_info);
3068
3069 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3070 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3071 DEBUG(10, ("no streams around\n"));
3072 TALLOC_FREE(frame);
3073 return NT_STATUS_OK;
3074 }
3075
3076 if (!NT_STATUS_IS_OK(status)) {
3077 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3078 nt_errstr(status)));
3079 goto fail;
3080 }
3081
3082 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3083 num_streams));
3084
3085 if (num_streams == 0) {
3086 TALLOC_FREE(frame);
3087 return NT_STATUS_OK;
3088 }
3089
3090 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3091 if (streams == NULL) {
3092 DEBUG(0, ("talloc failed\n"));
3093 status = NT_STATUS_NO_MEMORY;
3094 goto fail;
3095 }
3096
3097 for (i=0; i<num_streams; i++) {
3098 struct smb_filename *smb_fname = NULL;
3099
3100 if (strequal(stream_info[i].name, "::$DATA")) {
3101 streams[i] = NULL;
3102 continue;
3103 }
3104
3105 status = create_synthetic_smb_fname(talloc_tos(), fname,
3106 stream_info[i].name,
3107 NULL, &smb_fname);
3108 if (!NT_STATUS_IS_OK(status)) {
3109 goto fail;
3110 }
3111
3112 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3113 DEBUG(10, ("Unable to stat stream: %s\n",
3114 smb_fname_str_dbg(smb_fname)));
3115 }
3116
3117 status = SMB_VFS_CREATE_FILE(
3118 conn, /* conn */
3119 NULL, /* req */
3120 0, /* root_dir_fid */
3121 smb_fname, /* fname */
3122 DELETE_ACCESS, /* access_mask */
3123 (FILE_SHARE_READ | /* share_access */
3124 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3125 FILE_OPEN, /* create_disposition*/
3126 0, /* create_options */
3127 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3128 0, /* oplock_request */
3129 0, /* allocation_size */
3130 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3131 NULL, /* sd */
3132 NULL, /* ea_list */
3133 &streams[i], /* result */
3134 NULL); /* pinfo */
3135
3136 if (!NT_STATUS_IS_OK(status)) {
3137 DEBUG(10, ("Could not open stream %s: %s\n",
3138 smb_fname_str_dbg(smb_fname),
3139 nt_errstr(status)));
3140
3141 TALLOC_FREE(smb_fname);
3142 break;
3143 }
3144 TALLOC_FREE(smb_fname);
3145 }
3146
3147 /*
3148 * don't touch the variable "status" beyond this point :-)
3149 */
3150
3151 for (i -= 1 ; i >= 0; i--) {
3152 if (streams[i] == NULL) {
3153 continue;
3154 }
3155
3156 DEBUG(10, ("Closing stream # %d, %s\n", i,
3157 fsp_str_dbg(streams[i])));
3158 close_file(NULL, streams[i], NORMAL_CLOSE);
3159 }
3160
3161 fail:
3162 TALLOC_FREE(frame);
3163 return status;
3164 }
3165
3166 /*********************************************************************
3167 Create a default ACL by inheriting from the parent. If no inheritance
3168 from the parent available, don't set anything. This will leave the actual
3169 permissions the new file or directory already got from the filesystem
3170 as the NT ACL when read.
3171 *********************************************************************/
3172
3173 static NTSTATUS inherit_new_acl(files_struct *fsp)
3174 {
3175 TALLOC_CTX *ctx = talloc_tos();
3176 char *parent_name = NULL;
3177 struct security_descriptor *parent_desc = NULL;
3178 NTSTATUS status = NT_STATUS_OK;
3179 struct security_descriptor *psd = NULL;
3180 struct dom_sid *owner_sid = NULL;
3181 struct dom_sid *group_sid = NULL;
3182 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3183 bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3184 bool inheritable_components = false;
3185 size_t size = 0;
3186
3187 if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3188 return NT_STATUS_NO_MEMORY;
3189 }
3190
3191 status = SMB_VFS_GET_NT_ACL(fsp->conn,
3192 parent_name,
3193 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3194 &parent_desc);
3195 if (!NT_STATUS_IS_OK(status)) {
3196 return status;
3197 }
3198
3199 inheritable_components = sd_has_inheritable_components(parent_desc,
3200 fsp->is_directory);
3201
3202 if (!inheritable_components && !inherit_owner) {
3203 /* Nothing to inherit and not setting owner. */
3204 return NT_STATUS_OK;
3205 }
3206
3207 /* Create an inherited descriptor from the parent. */
3208
3209 if (DEBUGLEVEL >= 10) {
3210 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3211 fsp_str_dbg(fsp) ));
3212 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3213 }
3214
3215 /* Inherit from parent descriptor if "inherit owner" set. */
3216 if (inherit_owner) {
3217 owner_sid = parent_desc->owner_sid;
3218 group_sid = parent_desc->group_sid;
3219 }
3220
3221 if (owner_sid == NULL) {
3222 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3223 }
3224 if (group_sid == NULL) {
3225 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3226 }
3227
3228 status = se_create_child_secdesc(ctx,
3229 &psd,
3230 &size,
3231 parent_desc,
3232 owner_sid,
3233 group_sid,
3234 fsp->is_directory);
3235 if (!NT_STATUS_IS_OK(status)) {
3236 return status;
3237 }
3238
3239 /* If inheritable_components == false,
3240 se_create_child_secdesc()
3241 creates a security desriptor with a NULL dacl
3242 entry, but with SEC_DESC_DACL_PRESENT. We need
3243 to remove that flag. */
3244
3245 if (!inheritable_components) {
3246 security_info_sent &= ~SECINFO_DACL;
3247 psd->type &= ~SEC_DESC_DACL_PRESENT;
3248 }
3249
3250 if (DEBUGLEVEL >= 10) {
3251 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3252 fsp_str_dbg(fsp) ));
3253 NDR_PRINT_DEBUG(security_descriptor, psd);
3254 }
3255
3256 if (inherit_owner) {
3257 /* We need to be root to force this. */
3258 become_root();
3259 }
3260 status = SMB_VFS_FSET_NT_ACL(fsp,
3261 security_info_sent,
3262 psd);
3263 if (inherit_owner) {
3264 unbecome_root();
3265 }
3266 return status;
3267 }
3268
3269 /*
3270 * Wrapper around open_file_ntcreate and open_directory
3271 */
3272
3273 static NTSTATUS create_file_unixpath(connection_struct *conn,
3274 struct smb_request *req,
3275 struct smb_filename *smb_fname,
3276 uint32_t access_mask,
3277 uint32_t share_access,
3278 uint32_t create_disposition,
3279 uint32_t create_options,
3280 uint32_t file_attributes,
3281 uint32_t oplock_request,
3282 uint64_t allocation_size,
3283 uint32_t private_flags,
3284 struct security_descriptor *sd,
3285 struct ea_list *ea_list,
3286
3287 files_struct **result,
3288 int *pinfo)
3289 {
3290 int info = FILE_WAS_OPENED;
3291 files_struct *base_fsp = NULL;
3292 files_struct *fsp = NULL;
3293 NTSTATUS status;
3294
3295 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3296 "file_attributes = 0x%x, share_access = 0x%x, "
3297 "create_disposition = 0x%x create_options = 0x%x "
3298 "oplock_request = 0x%x private_flags = 0x%x "
3299 "ea_list = 0x%p, sd = 0x%p, "
3300 "fname = %s\n",
3301 (unsigned int)access_mask,
3302 (unsigned int)file_attributes,
3303 (unsigned int)share_access,
3304 (unsigned int)create_disposition,
3305 (unsigned int)create_options,
3306 (unsigned int)oplock_request,
3307 (unsigned int)private_flags,
3308 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3309
3310 if (create_options & FILE_OPEN_BY_FILE_ID) {
3311 status = NT_STATUS_NOT_SUPPORTED;
3312 goto fail;
3313 }
3314
3315 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3316 status = NT_STATUS_INVALID_PARAMETER;
3317 goto fail;
3318 }
3319
3320 if (req == NULL) {
3321 oplock_request |= INTERNAL_OPEN_ONLY;
3322 }
3323
3324 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3325 && (access_mask & DELETE_ACCESS)
3326 && !is_ntfs_stream_smb_fname(smb_fname)) {
3327 /*
3328 * We can't open a file with DELETE access if any of the
3329 * streams is open without FILE_SHARE_DELETE
3330 */
3331 status = open_streams_for_delete(conn, smb_fname->base_name);
3332
3333 if (!NT_STATUS_IS_OK(status)) {
3334 goto fail;
3335 }
3336 }
3337
3338 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3339 !security_token_has_privilege(get_current_nttok(conn),
3340 SEC_PRIV_SECURITY)) {
3341 DEBUG(10, ("create_file_unixpath: open on %s "
3342 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3343 smb_fname_str_dbg(smb_fname)));
3344 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3345 goto fail;
3346 }
3347
3348 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3349 && is_ntfs_stream_smb_fname(smb_fname)
3350 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3351 uint32 base_create_disposition;
3352 struct smb_filename *smb_fname_base = NULL;
3353
3354 if (create_options & FILE_DIRECTORY_FILE) {
3355 status = NT_STATUS_NOT_A_DIRECTORY;
3356 goto fail;
3357 }
3358
3359 switch (create_disposition) {
3360 case FILE_OPEN:
3361 base_create_disposition = FILE_OPEN;
3362 break;
3363 default:
3364 base_create_disposition = FILE_OPEN_IF;
3365 break;
3366 }
3367
3368 /* Create an smb_filename with stream_name == NULL. */
3369 status = create_synthetic_smb_fname(talloc_tos(),
3370 smb_fname->base_name,
3371 NULL, NULL,
3372 &smb_fname_base);
3373 if (!NT_STATUS_IS_OK(status)) {
3374 goto fail;
3375 }
3376
3377 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3378 DEBUG(10, ("Unable to stat stream: %s\n",
3379 smb_fname_str_dbg(smb_fname_base)));
3380 }
3381
3382 /* Open the base file. */
3383 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3384 FILE_SHARE_READ
3385 | FILE_SHARE_WRITE
3386 | FILE_SHARE_DELETE,
3387 base_create_disposition,
3388 0, 0, 0, 0, 0, NULL, NULL,
3389 &base_fsp, NULL);
3390 TALLOC_FREE(smb_fname_base);
3391
3392 if (!NT_STATUS_IS_OK(status)) {
3393 DEBUG(10, ("create_file_unixpath for base %s failed: "
3394 "%s\n", smb_fname->base_name,
3395 nt_errstr(status)));
3396 goto fail;
3397 }
3398 /* we don't need to low level fd */
3399 fd_close(base_fsp);
3400 }
3401
3402 /*
3403 * If it's a request for a directory open, deal with it separately.
3404 */
3405
3406 if (create_options & FILE_DIRECTORY_FILE) {
3407
3408 if (create_options & FILE_NON_DIRECTORY_FILE) {
3409 status = NT_STATUS_INVALID_PARAMETER;
3410 goto fail;
3411 }
3412
3413 /* Can't open a temp directory. IFS kit test. */
3414 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3415 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3416 status = NT_STATUS_INVALID_PARAMETER;
3417 goto fail;
3418 }
3419
3420 /*
3421 * We will get a create directory here if the Win32
3422 * app specified a security descriptor in the
3423 * CreateDirectory() call.
3424 */
3425
3426 oplock_request = 0;
3427 status = open_directory(
3428 conn, req, smb_fname, access_mask, share_access,
3429 create_disposition, create_options, file_attributes,
3430 &info, &fsp);
3431 } else {
3432
3433 /*
3434 * Ordinary file case.
3435 */
3436
3437 status = file_new(req, conn, &fsp);
3438 if(!NT_STATUS_IS_OK(status)) {
3439 goto fail;
3440 }
3441
3442 status = fsp_set_smb_fname(fsp, smb_fname);
3443 if (!NT_STATUS_IS_OK(status)) {
3444 goto fail;
3445 }
3446
3447 /*
3448 * We're opening the stream element of a base_fsp
3449 * we already opened. Set up the base_fsp pointer.
3450 */
3451 if (base_fsp) {
3452 fsp->base_fsp = base_fsp;
3453 }
3454
3455 status = open_file_ntcreate(conn,
3456 req,
3457 access_mask,
3458 share_access,
3459 create_disposition,
3460 create_options,
3461 file_attributes,
3462 oplock_request,
3463 private_flags,
3464 &info,
3465 fsp);
3466
3467 if(!NT_STATUS_IS_OK(status)) {
3468 file_free(req, fsp);
3469 fsp = NULL;
3470 }
3471
3472 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3473
3474 /* A stream open never opens a directory */
3475
3476 if (base_fsp) {
3477 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3478 goto fail;
3479 }
3480
3481 /*
3482 * Fail the open if it was explicitly a non-directory
3483 * file.
3484 */
3485
3486 if (create_options & FILE_NON_DIRECTORY_FILE) {
3487 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3488 goto fail;
3489 }
3490
3491 oplock_request = 0;
3492 status = open_directory(
3493 conn, req, smb_fname, access_mask,
3494 share_access, create_disposition,
3495 create_options, file_attributes,
3496 &info, &fsp);
3497 }
3498 }
3499
3500 if (!NT_STATUS_IS_OK(status)) {
3501 goto fail;
3502 }
3503
3504 fsp->base_fsp = base_fsp;
3505
3506 if ((ea_list != NULL) &&
3507 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3508 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3509 if (!NT_STATUS_IS_OK(status)) {
3510 goto fail;
3511 }
3512 }
3513
3514 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3515 status = NT_STATUS_ACCESS_DENIED;
3516 goto fail;
3517 }
3518
3519 /* Save the requested allocation size. */
3520 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3521 if (allocation_size
3522 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3523 fsp->initial_allocation_size = smb_roundup(
3524 fsp->conn, allocation_size);
3525 if (fsp->is_directory) {
3526 /* Can't set allocation size on a directory. */
3527 status = NT_STATUS_ACCESS_DENIED;
3528 goto fail;
3529 }
3530 if (vfs_allocate_file_space(
3531 fsp, fsp->initial_allocation_size) == -1) {
3532 status = NT_STATUS_DISK_FULL;
3533 goto fail;
3534 }
3535 } else {
3536 fsp->initial_allocation_size = smb_roundup(
3537 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3538 }
3539 }
3540
3541 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3542 fsp->base_fsp == NULL) {
3543 if (sd != NULL) {
3544 /*
3545 * According to the MS documentation, the only time the security
3546 * descriptor is applied to the opened file is iff we *created* the
3547 * file; an existing file stays the same.
3548 *
3549 * Also, it seems (from observation) that you can open the file with
3550 * any access mask but you can still write the sd. We need to override
3551 * the granted access before we call set_sd
3552 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3553 */
3554
3555 uint32_t sec_info_sent;
3556 uint32_t saved_access_mask = fsp->access_mask;
3557
3558 sec_info_sent = get_sec_info(sd);
3559
3560 fsp->access_mask = FILE_GENERIC_ALL;
3561
3562 /* Convert all the generic bits. */
3563 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3564 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3565
3566 if (sec_info_sent & (SECINFO_OWNER|
3567 SECINFO_GROUP|
3568 SECINFO_DACL|
3569 SECINFO_SACL)) {
3570 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3571 }
3572
3573 fsp->access_mask = saved_access_mask;
3574
3575 if (!NT_STATUS_IS_OK(status)) {
3576 goto fail;
3577 }
3578 } else if (lp_inherit_acls(SNUM(conn))) {
3579 /* Inherit from parent. Errors here are not fatal. */
3580 status = inherit_new_acl(fsp);
3581 if (!NT_STATUS_IS_OK(status)) {
3582 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3583 fsp_str_dbg(fsp),
3584 nt_errstr(status) ));
3585 }
3586 }
3587 }
3588
3589 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3590
3591 *result = fsp;
3592 if (pinfo != NULL) {
3593 *pinfo = info;
3594 }
3595
3596 smb_fname->st = fsp->fsp_name->st;
3597
3598 return NT_STATUS_OK;
3599
3600 fail:
3601 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3602
3603 if (fsp != NULL) {
3604 if (base_fsp && fsp->base_fsp == base_fsp) {
3605 /*
3606 * The close_file below will close
3607 * fsp->base_fsp.
3608 */
3609 base_fsp = NULL;
3610 }
3611 close_file(req, fsp, ERROR_CLOSE);
3612 fsp = NULL;
3613 }
3614 if (base_fsp != NULL) {
3615 close_file(req, base_fsp, ERROR_CLOSE);
3616 base_fsp = NULL;
3617 }
3618 return status;
3619 }
3620
3621 /*
3622 * Calculate the full path name given a relative fid.
3623 */
3624 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3625 struct smb_request *req,
3626 uint16_t root_dir_fid,
3627 const struct smb_filename *smb_fname,
3628 struct smb_filename **smb_fname_out)
3629 {
3630 files_struct *dir_fsp;
3631 char *parent_fname = NULL;
3632 char *new_base_name = NULL;
3633 NTSTATUS status;
3634
3635 if (root_dir_fid == 0 || !smb_fname) {
3636 status = NT_STATUS_INTERNAL_ERROR;
3637 goto out;
3638 }
3639
3640 dir_fsp = file_fsp(req, root_dir_fid);
3641
3642 if (dir_fsp == NULL) {
3643 status = NT_STATUS_INVALID_HANDLE;
3644 goto out;
3645 }
3646
3647 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3648 status = NT_STATUS_INVALID_HANDLE;
3649 goto out;
3650 }
3651
3652 if (!dir_fsp->is_directory) {
3653
3654 /*
3655 * Check to see if this is a mac fork of some kind.
3656 */
3657
3658 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3659 is_ntfs_stream_smb_fname(smb_fname)) {
3660 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3661 goto out;
3662 }
3663
3664 /*
3665 we need to handle the case when we get a
3666 relative open relative to a file and the
3667 pathname is blank - this is a reopen!
3668 (hint from demyn plantenberg)
3669 */
3670
3671 status = NT_STATUS_INVALID_HANDLE;
3672 goto out;
3673 }
3674
3675 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3676 /*
3677 * We're at the toplevel dir, the final file name
3678 * must not contain ./, as this is filtered out
3679 * normally by srvstr_get_path and unix_convert
3680 * explicitly rejects paths containing ./.
3681 */
3682 parent_fname = talloc_strdup(talloc_tos(), "");
3683 if (parent_fname == NULL) {
3684 status = NT_STATUS_NO_MEMORY;
3685 goto out;
3686 }
3687 } else {
3688 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3689
3690 /*
3691 * Copy in the base directory name.
3692 */
3693
3694 parent_fname = talloc_array(talloc_tos(), char,
3695 dir_name_len+2);
3696 if (parent_fname == NULL) {
3697 status = NT_STATUS_NO_MEMORY;
3698 goto out;
3699 }
3700 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3701 dir_name_len+1);
3702
3703 /*
3704 * Ensure it ends in a '/'.
3705 * We used TALLOC_SIZE +2 to add space for the '/'.
3706 */
3707
3708 if(dir_name_len
3709 && (parent_fname[dir_name_len-1] != '\\')
3710 && (parent_fname[dir_name_len-1] != '/')) {
3711 parent_fname[dir_name_len] = '/';
3712 parent_fname[dir_name_len+1] = '\0';
3713 }
3714 }
3715
3716 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3717 smb_fname->base_name);
3718 if (new_base_name == NULL) {
3719 status = NT_STATUS_NO_MEMORY;
3720 goto out;
3721 }
3722
3723 status = filename_convert(req,
3724 conn,
3725 req->flags2 & FLAGS2_DFS_PATHNAMES,
3726 new_base_name,
3727 0,
3728 NULL,
3729 smb_fname_out);
3730 if (!NT_STATUS_IS_OK(status)) {
3731 goto out;
3732 }
3733
3734 out:
3735 TALLOC_FREE(parent_fname);
3736 TALLOC_FREE(new_base_name);
3737 return status;
3738 }
3739
3740 NTSTATUS create_file_default(connection_struct *conn,
3741 struct smb_request *req,
3742 uint16_t root_dir_fid,
3743 struct smb_filename *smb_fname,
3744 uint32_t access_mask,
3745 uint32_t share_access,
3746 uint32_t create_disposition,
3747 uint32_t create_options,
3748 uint32_t file_attributes,
3749 uint32_t oplock_request,
3750 uint64_t allocation_size,
3751 uint32_t private_flags,
3752 struct security_descriptor *sd,
3753 struct ea_list *ea_list,
3754 files_struct **result,
3755 int *pinfo)
3756 {
3757 int info = FILE_WAS_OPENED;
3758 files_struct *fsp = NULL;
3759 NTSTATUS status;
3760 bool stream_name = false;
3761
3762 DEBUG(10,("create_file: access_mask = 0x%x "
3763 "file_attributes = 0x%x, share_access = 0x%x, "
3764 "create_disposition = 0x%x create_options = 0x%x "
3765 "oplock_request = 0x%x "
3766 "private_flags = 0x%x "
3767 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3768 "fname = %s\n",
3769 (unsigned int)access_mask,
3770 (unsigned int)file_attributes,
3771 (unsigned int)share_access,
3772 (unsigned int)create_disposition,
3773 (unsigned int)create_options,
3774 (unsigned int)oplock_request,
3775 (unsigned int)private_flags,
3776 (unsigned int)root_dir_fid,
3777 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3778
3779 /*
3780 * Calculate the filename from the root_dir_if if necessary.
3781 */
3782
3783 if (root_dir_fid != 0) {
3784 struct smb_filename *smb_fname_out = NULL;
3785 status = get_relative_fid_filename(conn, req, root_dir_fid,
3786 smb_fname, &smb_fname_out);
3787 if (!NT_STATUS_IS_OK(status)) {
3788 goto fail;
3789 }
3790 smb_fname = smb_fname_out;
3791 }
3792
3793 /*
3794 * Check to see if this is a mac fork of some kind.
3795 */
3796
3797 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3798 if (stream_name) {
3799 enum FAKE_FILE_TYPE fake_file_type;
3800
3801 fake_file_type = is_fake_file(smb_fname);
3802
3803 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3804
3805 /*
3806 * Here we go! support for changing the disk quotas
3807 * --metze
3808 *
3809 * We need to fake up to open this MAGIC QUOTA file
3810 * and return a valid FID.
3811 *
3812 * w2k close this file directly after openening xp
3813 * also tries a QUERY_FILE_INFO on the file and then
3814 * close it
3815 */
3816 status = open_fake_file(req, conn, req->vuid,
3817 fake_file_type, smb_fname,
3818 access_mask, &fsp);
3819 if (!NT_STATUS_IS_OK(status)) {
3820 goto fail;
3821 }
3822
3823 ZERO_STRUCT(smb_fname->st);
3824 goto done;
3825 }
3826
3827 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3828 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3829 goto fail;
3830 }
3831 }
3832
3833 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
3834 int ret;
3835 smb_fname->stream_name = NULL;
3836 /* We have to handle this error here. */
3837 if (create_options & FILE_DIRECTORY_FILE) {
3838 status = NT_STATUS_NOT_A_DIRECTORY;
3839 goto fail;
3840 }
3841 if (lp_posix_pathnames()) {
3842 ret = SMB_VFS_LSTAT(conn, smb_fname);
3843 } else {
3844 ret = SMB_VFS_STAT(conn, smb_fname);
3845 }
3846
3847 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3848 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3849 goto fail;
3850 }
3851 }
3852
3853 status = create_file_unixpath(
3854 conn, req, smb_fname, access_mask, share_access,
3855 create_disposition, create_options, file_attributes,
3856 oplock_request, allocation_size, private_flags,
3857 sd, ea_list,
3858 &fsp, &info);
3859
3860 if (!NT_STATUS_IS_OK(status)) {
3861 goto fail;
3862 }
3863
3864 done:
3865 DEBUG(10, ("create_file: info=%d\n", info));
3866
3867 *result = fsp;
3868 if (pinfo != NULL) {
3869 *pinfo = info;
3870 }
3871 return NT_STATUS_OK;
3872
3873 fail:
3874 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3875
3876 if (fsp != NULL) {
3877 close_file(req, fsp, ERROR_CLOSE);
3878 fsp = NULL;
3879 }
3880 return status;
3881 }
reg import