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s3:smb2_flush: make use of file_fsp_smb2()
[Samba/gebeck_regimport.git] / source3 / smbd / open.c
blob4581553be2f8e1af26503a4de47eb636836e516e
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 overrides 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 {
212 NTSTATUS status;
213 char *parent_dir = NULL;
214 struct security_descriptor *parent_sd = NULL;
215 uint32_t access_granted = 0;
216
217 if (!parent_dirname(talloc_tos(),
218 smb_fname->base_name,
219 &parent_dir,
220 NULL)) {
221 return NT_STATUS_NO_MEMORY;
222 }
223
224 if (get_current_uid(conn) == (uid_t)0) {
225 /* I'm sorry sir, I didn't know you were root... */
226 DEBUG(10,("check_parent_access: root override "
227 "on %s. Granting 0x%x\n",
228 smb_fname_str_dbg(smb_fname),
229 (unsigned int)access_mask ));
230 return NT_STATUS_OK;
231 }
232
233 status = SMB_VFS_GET_NT_ACL(conn,
234 parent_dir,
235 SECINFO_DACL,
236 &parent_sd);
237
238 if (!NT_STATUS_IS_OK(status)) {
239 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
240 "%s with error %s\n",
241 parent_dir,
242 nt_errstr(status)));
243 return status;
244 }
245
246 /*
247 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
248 * owner WRITE_DAC and READ_CONTROL.
249 */
250 status = se_access_check(parent_sd,
251 get_current_nttok(conn),
252 (access_mask & ~FILE_READ_ATTRIBUTES),
253 &access_granted);
254 if(!NT_STATUS_IS_OK(status)) {
255 DEBUG(5,("check_parent_access: access check "
256 "on directory %s for "
257 "path %s for mask 0x%x returned (0x%x) %s\n",
258 parent_dir,
259 smb_fname->base_name,
260 access_mask,
261 access_granted,
262 nt_errstr(status) ));
263 return status;
264 }
265
266 return NT_STATUS_OK;
267 }
268
269 /****************************************************************************
270 fd support routines - attempt to do a dos_open.
271 ****************************************************************************/
272
273 static NTSTATUS fd_open(struct connection_struct *conn,
274 files_struct *fsp,
275 int flags,
276 mode_t mode)
277 {
278 struct smb_filename *smb_fname = fsp->fsp_name;
279 NTSTATUS status = NT_STATUS_OK;
280
281 #ifdef O_NOFOLLOW
282 /*
283 * Never follow symlinks on a POSIX client. The
284 * client should be doing this.
285 */
286
287 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
288 flags |= O_NOFOLLOW;
289 }
290 #endif
291
292 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
293 if (fsp->fh->fd == -1) {
294 status = map_nt_error_from_unix(errno);
295 if (errno == EMFILE) {
296 static time_t last_warned = 0L;
297
298 if (time((time_t *) NULL) > last_warned) {
299 DEBUG(0,("Too many open files, unable "
300 "to open more! smbd's max "
301 "open files = %d\n",
302 lp_max_open_files()));
303 last_warned = time((time_t *) NULL);
304 }
305 }
306
307 }
308
309 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
310 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
311 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
312
313 return status;
314 }
315
316 /****************************************************************************
317 Close the file associated with a fsp.
318 ****************************************************************************/
319
320 NTSTATUS fd_close(files_struct *fsp)
321 {
322 int ret;
323
324 if (fsp->dptr) {
325 dptr_CloseDir(fsp);
326 }
327 if (fsp->fh->fd == -1) {
328 return NT_STATUS_OK; /* What we used to call a stat open. */
329 }
330 if (fsp->fh->ref_count > 1) {
331 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
332 }
333
334 ret = SMB_VFS_CLOSE(fsp);
335 fsp->fh->fd = -1;
336 if (ret == -1) {
337 return map_nt_error_from_unix(errno);
338 }
339 return NT_STATUS_OK;
340 }
341
342 /****************************************************************************
343 Change the ownership of a file to that of the parent directory.
344 Do this by fd if possible.
345 ****************************************************************************/
346
347 void change_file_owner_to_parent(connection_struct *conn,
348 const char *inherit_from_dir,
349 files_struct *fsp)
350 {
351 struct smb_filename *smb_fname_parent = NULL;
352 NTSTATUS status;
353 int ret;
354
355 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
356 NULL, NULL, &smb_fname_parent);
357 if (!NT_STATUS_IS_OK(status)) {
358 return;
359 }
360
361 ret = SMB_VFS_STAT(conn, smb_fname_parent);
362 if (ret == -1) {
363 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
364 "directory %s. Error was %s\n",
365 smb_fname_str_dbg(smb_fname_parent),
366 strerror(errno)));
367 TALLOC_FREE(smb_fname_parent);
368 return;
369 }
370
371 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
372 /* Already this uid - no need to change. */
373 DEBUG(10,("change_file_owner_to_parent: file %s "
374 "is already owned by uid %d\n",
375 fsp_str_dbg(fsp),
376 (int)fsp->fsp_name->st.st_ex_uid ));
377 TALLOC_FREE(smb_fname_parent);
378 return;
379 }
380
381 become_root();
382 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
383 unbecome_root();
384 if (ret == -1) {
385 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
386 "file %s to parent directory uid %u. Error "
387 "was %s\n", fsp_str_dbg(fsp),
388 (unsigned int)smb_fname_parent->st.st_ex_uid,
389 strerror(errno) ));
390 } else {
391 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
392 "parent directory uid %u.\n", fsp_str_dbg(fsp),
393 (unsigned int)smb_fname_parent->st.st_ex_uid));
394 /* Ensure the uid entry is updated. */
395 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
396 }
397
398 TALLOC_FREE(smb_fname_parent);
399 }
400
401 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
402 const char *inherit_from_dir,
403 const char *fname,
404 SMB_STRUCT_STAT *psbuf)
405 {
406 struct smb_filename *smb_fname_parent = NULL;
407 struct smb_filename *smb_fname_cwd = NULL;
408 char *saved_dir = NULL;
409 TALLOC_CTX *ctx = talloc_tos();
410 NTSTATUS status = NT_STATUS_OK;
411 int ret;
412
413 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
414 &smb_fname_parent);
415 if (!NT_STATUS_IS_OK(status)) {
416 return status;
417 }
418
419 ret = SMB_VFS_STAT(conn, smb_fname_parent);
420 if (ret == -1) {
421 status = map_nt_error_from_unix(errno);
422 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
423 "directory %s. Error was %s\n",
424 smb_fname_str_dbg(smb_fname_parent),
425 strerror(errno)));
426 goto out;
427 }
428
429 /* We've already done an lstat into psbuf, and we know it's a
430 directory. If we can cd into the directory and the dev/ino
431 are the same then we can safely chown without races as
432 we're locking the directory in place by being in it. This
433 should work on any UNIX (thanks tridge :-). JRA.
434 */
435
436 saved_dir = vfs_GetWd(ctx,conn);
437 if (!saved_dir) {
438 status = map_nt_error_from_unix(errno);
439 DEBUG(0,("change_dir_owner_to_parent: failed to get "
440 "current working directory. Error was %s\n",
441 strerror(errno)));
442 goto out;
443 }
444
445 /* Chdir into the new path. */
446 if (vfs_ChDir(conn, fname) == -1) {
447 status = map_nt_error_from_unix(errno);
448 DEBUG(0,("change_dir_owner_to_parent: failed to change "
449 "current working directory to %s. Error "
450 "was %s\n", fname, strerror(errno) ));
451 goto chdir;
452 }
453
454 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
455 &smb_fname_cwd);
456 if (!NT_STATUS_IS_OK(status)) {
457 return status;
458 }
459
460 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
461 if (ret == -1) {
462 status = map_nt_error_from_unix(errno);
463 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
464 "directory '.' (%s) Error was %s\n",
465 fname, strerror(errno)));
466 goto chdir;
467 }
468
469 /* Ensure we're pointing at the same place. */
470 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
471 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
472 DEBUG(0,("change_dir_owner_to_parent: "
473 "device/inode on directory %s changed. "
474 "Refusing to chown !\n", fname ));
475 status = NT_STATUS_ACCESS_DENIED;
476 goto chdir;
477 }
478
479 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
480 /* Already this uid - no need to change. */
481 DEBUG(10,("change_dir_owner_to_parent: directory %s "
482 "is already owned by uid %d\n",
483 fname,
484 (int)smb_fname_cwd->st.st_ex_uid ));
485 status = NT_STATUS_OK;
486 goto chdir;
487 }
488
489 become_root();
490 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
491 (gid_t)-1);
492 unbecome_root();
493 if (ret == -1) {
494 status = map_nt_error_from_unix(errno);
495 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
496 "directory %s to parent directory uid %u. "
497 "Error was %s\n", fname,
498 (unsigned int)smb_fname_parent->st.st_ex_uid,
499 strerror(errno) ));
500 } else {
501 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
502 "directory %s to parent directory uid %u.\n",
503 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
504 /* Ensure the uid entry is updated. */
505 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
506 }
507
508 chdir:
509 vfs_ChDir(conn,saved_dir);
510 out:
511 TALLOC_FREE(smb_fname_parent);
512 TALLOC_FREE(smb_fname_cwd);
513 return status;
514 }
515
516 /****************************************************************************
517 Open a file.
518 ****************************************************************************/
519
520 static NTSTATUS open_file(files_struct *fsp,
521 connection_struct *conn,
522 struct smb_request *req,
523 const char *parent_dir,
524 int flags,
525 mode_t unx_mode,
526 uint32 access_mask, /* client requested access mask. */
527 uint32 open_access_mask) /* what we're actually using in the open. */
528 {
529 struct smb_filename *smb_fname = fsp->fsp_name;
530 NTSTATUS status = NT_STATUS_OK;
531 int accmode = (flags & O_ACCMODE);
532 int local_flags = flags;
533 bool file_existed = VALID_STAT(fsp->fsp_name->st);
534 bool file_created = false;
535
536 fsp->fh->fd = -1;
537 errno = EPERM;
538
539 /* Check permissions */
540
541 /*
542 * This code was changed after seeing a client open request
543 * containing the open mode of (DENY_WRITE/read-only) with
544 * the 'create if not exist' bit set. The previous code
545 * would fail to open the file read only on a read-only share
546 * as it was checking the flags parameter directly against O_RDONLY,
547 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
548 * JRA.
549 */
550
551 if (!CAN_WRITE(conn)) {
552 /* It's a read-only share - fail if we wanted to write. */
553 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
554 DEBUG(3,("Permission denied opening %s\n",
555 smb_fname_str_dbg(smb_fname)));
556 return NT_STATUS_ACCESS_DENIED;
557 } else if(flags & O_CREAT) {
558 /* We don't want to write - but we must make sure that
559 O_CREAT doesn't create the file if we have write
560 access into the directory.
561 */
562 flags &= ~(O_CREAT|O_EXCL);
563 local_flags &= ~(O_CREAT|O_EXCL);
564 }
565 }
566
567 /*
568 * This little piece of insanity is inspired by the
569 * fact that an NT client can open a file for O_RDONLY,
570 * but set the create disposition to FILE_EXISTS_TRUNCATE.
571 * If the client *can* write to the file, then it expects to
572 * truncate the file, even though it is opening for readonly.
573 * Quicken uses this stupid trick in backup file creation...
574 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
575 * for helping track this one down. It didn't bite us in 2.0.x
576 * as we always opened files read-write in that release. JRA.
577 */
578
579 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
580 DEBUG(10,("open_file: truncate requested on read-only open "
581 "for file %s\n", smb_fname_str_dbg(smb_fname)));
582 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
583 }
584
585 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
586 (!file_existed && (local_flags & O_CREAT)) ||
587 ((local_flags & O_TRUNC) == O_TRUNC) ) {
588 const char *wild;
589
590 /*
591 * We can't actually truncate here as the file may be locked.
592 * open_file_ntcreate will take care of the truncate later. JRA.
593 */
594
595 local_flags &= ~O_TRUNC;
596
597 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
598 /*
599 * We would block on opening a FIFO with no one else on the
600 * other end. Do what we used to do and add O_NONBLOCK to the
601 * open flags. JRA.
602 */
603
604 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
605 local_flags |= O_NONBLOCK;
606 }
607 #endif
608
609 /* Don't create files with Microsoft wildcard characters. */
610 if (fsp->base_fsp) {
611 /*
612 * wildcard characters are allowed in stream names
613 * only test the basefilename
614 */
615 wild = fsp->base_fsp->fsp_name->base_name;
616 } else {
617 wild = smb_fname->base_name;
618 }
619 if ((local_flags & O_CREAT) && !file_existed &&
620 ms_has_wild(wild)) {
621 return NT_STATUS_OBJECT_NAME_INVALID;
622 }
623
624 /* Can we access this file ? */
625 if (!fsp->base_fsp) {
626 /* Only do this check on non-stream open. */
627 if (file_existed) {
628 status = smbd_check_access_rights(conn,
629 smb_fname,
630 access_mask);
631 } else if (local_flags & O_CREAT){
632 status = check_parent_access(conn,
633 smb_fname,
634 SEC_DIR_ADD_FILE);
635 } else {
636 /* File didn't exist and no O_CREAT. */
637 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
638 }
639 if (!NT_STATUS_IS_OK(status)) {
640 DEBUG(10,("open_file: "
641 "%s on file "
642 "%s returned %s\n",
643 file_existed ?
644 "smbd_check_access_rights" :
645 "check_parent_access",
646 smb_fname_str_dbg(smb_fname),
647 nt_errstr(status) ));
648 return status;
649 }
650 }
651
652 /* Actually do the open */
653 status = fd_open(conn, fsp, local_flags, unx_mode);
654 if (!NT_STATUS_IS_OK(status)) {
655 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
656 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
657 nt_errstr(status),local_flags,flags));
658 return status;
659 }
660
661 if ((local_flags & O_CREAT) && !file_existed) {
662 file_created = true;
663 }
664
665 } else {
666 fsp->fh->fd = -1; /* What we used to call a stat open. */
667 if (!file_existed) {
668 /* File must exist for a stat open. */
669 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
670 }
671
672 status = smbd_check_access_rights(conn,
673 smb_fname,
674 access_mask);
675
676 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
677 fsp->posix_open &&
678 S_ISLNK(smb_fname->st.st_ex_mode)) {
679 /* This is a POSIX stat open for delete
680 * or rename on a symlink that points
681 * nowhere. Allow. */
682 DEBUG(10,("open_file: allowing POSIX "
683 "open on bad symlink %s\n",
684 smb_fname_str_dbg(smb_fname)));
685 status = NT_STATUS_OK;
686 }
687
688 if (!NT_STATUS_IS_OK(status)) {
689 DEBUG(10,("open_file: "
690 "smbd_check_access_rights on file "
691 "%s returned %s\n",
692 smb_fname_str_dbg(smb_fname),
693 nt_errstr(status) ));
694 return status;
695 }
696 }
697
698 if (!file_existed) {
699 int ret;
700
701 if (fsp->fh->fd == -1) {
702 ret = SMB_VFS_STAT(conn, smb_fname);
703 } else {
704 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
705 /* If we have an fd, this stat should succeed. */
706 if (ret == -1) {
707 DEBUG(0,("Error doing fstat on open file %s "
708 "(%s)\n",
709 smb_fname_str_dbg(smb_fname),
710 strerror(errno) ));
711 }
712 }
713
714 /* For a non-io open, this stat failing means file not found. JRA */
715 if (ret == -1) {
716 status = map_nt_error_from_unix(errno);
717 fd_close(fsp);
718 return status;
719 }
720
721 if (file_created) {
722 bool need_re_stat = false;
723 /* Do all inheritance work after we've
724 done a successful stat call and filled
725 in the stat struct in fsp->fsp_name. */
726
727 /* Inherit the ACL if required */
728 if (lp_inherit_perms(SNUM(conn))) {
729 inherit_access_posix_acl(conn, parent_dir,
730 smb_fname->base_name,
731 unx_mode);
732 need_re_stat = true;
733 }
734
735 /* Change the owner if required. */
736 if (lp_inherit_owner(SNUM(conn))) {
737 change_file_owner_to_parent(conn, parent_dir,
738 fsp);
739 need_re_stat = true;
740 }
741
742 if (need_re_stat) {
743 if (fsp->fh->fd == -1) {
744 ret = SMB_VFS_STAT(conn, smb_fname);
745 } else {
746 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
747 /* If we have an fd, this stat should succeed. */
748 if (ret == -1) {
749 DEBUG(0,("Error doing fstat on open file %s "
750 "(%s)\n",
751 smb_fname_str_dbg(smb_fname),
752 strerror(errno) ));
753 }
754 }
755 }
756
757 notify_fname(conn, NOTIFY_ACTION_ADDED,
758 FILE_NOTIFY_CHANGE_FILE_NAME,
759 smb_fname->base_name);
760 }
761 }
762
763 /*
764 * POSIX allows read-only opens of directories. We don't
765 * want to do this (we use a different code path for this)
766 * so catch a directory open and return an EISDIR. JRA.
767 */
768
769 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
770 fd_close(fsp);
771 errno = EISDIR;
772 return NT_STATUS_FILE_IS_A_DIRECTORY;
773 }
774
775 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
776 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
777 fsp->file_pid = req ? req->smbpid : 0;
778 fsp->can_lock = True;
779 fsp->can_read = ((access_mask & FILE_READ_DATA) != 0);
780 fsp->can_write =
781 CAN_WRITE(conn) &&
782 ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0);
783 fsp->print_file = NULL;
784 fsp->modified = False;
785 fsp->sent_oplock_break = NO_BREAK_SENT;
786 fsp->is_directory = False;
787 if (conn->aio_write_behind_list &&
788 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
789 conn->case_sensitive)) {
790 fsp->aio_write_behind = True;
791 }
792
793 fsp->wcp = NULL; /* Write cache pointer. */
794
795 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
796 conn->session_info->unix_info->unix_name,
797 smb_fname_str_dbg(smb_fname),
798 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
799 conn->num_files_open));
800
801 errno = 0;
802 return NT_STATUS_OK;
803 }
804
805 /****************************************************************************
806 Check if we can open a file with a share mode.
807 Returns True if conflict, False if not.
808 ****************************************************************************/
809
810 static bool share_conflict(struct share_mode_entry *entry,
811 uint32 access_mask,
812 uint32 share_access)
813 {
814 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
815 "entry->share_access = 0x%x, "
816 "entry->private_options = 0x%x\n",
817 (unsigned int)entry->access_mask,
818 (unsigned int)entry->share_access,
819 (unsigned int)entry->private_options));
820
821 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
822 (unsigned int)access_mask, (unsigned int)share_access));
823
824 if ((entry->access_mask & (FILE_WRITE_DATA|
825 FILE_APPEND_DATA|
826 FILE_READ_DATA|
827 FILE_EXECUTE|
828 DELETE_ACCESS)) == 0) {
829 DEBUG(10,("share_conflict: No conflict due to "
830 "entry->access_mask = 0x%x\n",
831 (unsigned int)entry->access_mask ));
832 return False;
833 }
834
835 if ((access_mask & (FILE_WRITE_DATA|
836 FILE_APPEND_DATA|
837 FILE_READ_DATA|
838 FILE_EXECUTE|
839 DELETE_ACCESS)) == 0) {
840 DEBUG(10,("share_conflict: No conflict due to "
841 "access_mask = 0x%x\n",
842 (unsigned int)access_mask ));
843 return False;
844 }
845
846 #if 1 /* JRA TEST - Superdebug. */
847 #define CHECK_MASK(num, am, right, sa, share) \
848 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
849 (unsigned int)(num), (unsigned int)(am), \
850 (unsigned int)(right), (unsigned int)(am)&(right) )); \
851 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
852 (unsigned int)(num), (unsigned int)(sa), \
853 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
854 if (((am) & (right)) && !((sa) & (share))) { \
855 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
856 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
857 (unsigned int)(share) )); \
858 return True; \
859 }
860 #else
861 #define CHECK_MASK(num, am, right, sa, share) \
862 if (((am) & (right)) && !((sa) & (share))) { \
863 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
864 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
865 (unsigned int)(share) )); \
866 return True; \
867 }
868 #endif
869
870 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
871 share_access, FILE_SHARE_WRITE);
872 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
873 entry->share_access, FILE_SHARE_WRITE);
874
875 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
876 share_access, FILE_SHARE_READ);
877 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
878 entry->share_access, FILE_SHARE_READ);
879
880 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
881 share_access, FILE_SHARE_DELETE);
882 CHECK_MASK(6, access_mask, DELETE_ACCESS,
883 entry->share_access, FILE_SHARE_DELETE);
884
885 DEBUG(10,("share_conflict: No conflict.\n"));
886 return False;
887 }
888
889 #if defined(DEVELOPER)
890 static void validate_my_share_entries(struct smbd_server_connection *sconn,
891 int num,
892 struct share_mode_entry *share_entry)
893 {
894 struct server_id self = messaging_server_id(sconn->msg_ctx);
895 files_struct *fsp;
896
897 if (!procid_equal(&self, &share_entry->pid)) {
898 return;
899 }
900
901 if (is_deferred_open_entry(share_entry) &&
902 !open_was_deferred(sconn, share_entry->op_mid)) {
903 char *str = talloc_asprintf(talloc_tos(),
904 "Got a deferred entry without a request: "
905 "PANIC: %s\n",
906 share_mode_str(talloc_tos(), num, share_entry));
907 smb_panic(str);
908 }
909
910 if (!is_valid_share_mode_entry(share_entry)) {
911 return;
912 }
913
914 fsp = file_find_dif(sconn, share_entry->id,
915 share_entry->share_file_id);
916 if (!fsp) {
917 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
918 share_mode_str(talloc_tos(), num, share_entry) ));
919 smb_panic("validate_my_share_entries: Cannot match a "
920 "share entry with an open file\n");
921 }
922
923 if (is_deferred_open_entry(share_entry)) {
924 goto panic;
925 }
926
927 if ((share_entry->op_type == NO_OPLOCK) &&
928 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
929 /* Someone has already written to it, but I haven't yet
930 * noticed */
931 return;
932 }
933
934 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
935 goto panic;
936 }
937
938 return;
939
940 panic:
941 {
942 char *str;
943 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
944 share_mode_str(talloc_tos(), num, share_entry) ));
945 str = talloc_asprintf(talloc_tos(),
946 "validate_my_share_entries: "
947 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
948 fsp->fsp_name->base_name,
949 (unsigned int)fsp->oplock_type,
950 (unsigned int)share_entry->op_type );
951 smb_panic(str);
952 }
953 }
954 #endif
955
956 bool is_stat_open(uint32 access_mask)
957 {
958 return (access_mask &&
959 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
960 FILE_WRITE_ATTRIBUTES))==0) &&
961 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
962 FILE_WRITE_ATTRIBUTES)) != 0));
963 }
964
965 /****************************************************************************
966 Deal with share modes
967 Invarient: Share mode must be locked on entry and exit.
968 Returns -1 on error, or number of share modes on success (may be zero).
969 ****************************************************************************/
970
971 static NTSTATUS open_mode_check(connection_struct *conn,
972 struct share_mode_lock *lck,
973 uint32_t name_hash,
974 uint32 access_mask,
975 uint32 share_access,
976 uint32 create_options,
977 bool *file_existed)
978 {
979 int i;
980
981 if(lck->data->num_share_modes == 0) {
982 return NT_STATUS_OK;
983 }
984
985 /* A delete on close prohibits everything */
986
987 if (is_delete_on_close_set(lck, name_hash)) {
988 /*
989 * Check the delete on close token
990 * is valid. It could have been left
991 * after a server crash.
992 */
993 for(i = 0; i < lck->data->num_share_modes; i++) {
994 if (!share_mode_stale_pid(lck->data, i)) {
995
996 *file_existed = true;
997
998 return NT_STATUS_DELETE_PENDING;
999 }
1000 }
1001 return NT_STATUS_OK;
1002 }
1003
1004 if (is_stat_open(access_mask)) {
1005 /* Stat open that doesn't trigger oplock breaks or share mode
1006 * checks... ! JRA. */
1007 return NT_STATUS_OK;
1008 }
1009
1010 /*
1011 * Check if the share modes will give us access.
1012 */
1013
1014 #if defined(DEVELOPER)
1015 for(i = 0; i < lck->data->num_share_modes; i++) {
1016 validate_my_share_entries(conn->sconn, i,
1017 &lck->data->share_modes[i]);
1018 }
1019 #endif
1020
1021 if (!lp_share_modes(SNUM(conn))) {
1022 return NT_STATUS_OK;
1023 }
1024
1025 /* Now we check the share modes, after any oplock breaks. */
1026 for(i = 0; i < lck->data->num_share_modes; i++) {
1027
1028 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1029 continue;
1030 }
1031
1032 /* someone else has a share lock on it, check to see if we can
1033 * too */
1034 if (share_conflict(&lck->data->share_modes[i],
1035 access_mask, share_access)) {
1036
1037 if (share_mode_stale_pid(lck->data, i)) {
1038 continue;
1039 }
1040
1041 *file_existed = true;
1042
1043 return NT_STATUS_SHARING_VIOLATION;
1044 }
1045 }
1046
1047 if (lck->data->num_share_modes != 0) {
1048 *file_existed = true;
1049 }
1050
1051 return NT_STATUS_OK;
1052 }
1053
1054 static bool is_delete_request(files_struct *fsp) {
1055 return ((fsp->access_mask == DELETE_ACCESS) &&
1056 (fsp->oplock_type == NO_OPLOCK));
1057 }
1058
1059 /*
1060 * Send a break message to the oplock holder and delay the open for
1061 * our client.
1062 */
1063
1064 static NTSTATUS send_break_message(files_struct *fsp,
1065 struct share_mode_entry *exclusive,
1066 uint64_t mid,
1067 int oplock_request)
1068 {
1069 NTSTATUS status;
1070 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1071
1072 DEBUG(10, ("Sending break request to PID %s\n",
1073 procid_str_static(&exclusive->pid)));
1074 exclusive->op_mid = mid;
1075
1076 /* Create the message. */
1077 share_mode_entry_to_message(msg, exclusive);
1078
1079 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1080 don't want this set in the share mode struct pointed to by lck. */
1081
1082 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1083 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1084 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1085 }
1086
1087 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1088 MSG_SMB_BREAK_REQUEST,
1089 (uint8 *)msg,
1090 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1091 if (!NT_STATUS_IS_OK(status)) {
1092 DEBUG(3, ("Could not send oplock break message: %s\n",
1093 nt_errstr(status)));
1094 }
1095
1096 return status;
1097 }
1098
1099 /*
1100 * Return share_mode_entry pointers for :
1101 * 1). Batch oplock entry.
1102 * 2). Batch or exclusive oplock entry (may be identical to #1).
1103 * bool have_level2_oplock
1104 * bool have_no_oplock.
1105 * Do internal consistency checks on the share mode for a file.
1106 */
1107
1108 static void find_oplock_types(files_struct *fsp,
1109 int oplock_request,
1110 const struct share_mode_lock *lck,
1111 struct share_mode_entry **pp_batch,
1112 struct share_mode_entry **pp_ex_or_batch,
1113 bool *got_level2,
1114 bool *got_no_oplock)
1115 {
1116 int i;
1117
1118 *pp_batch = NULL;
1119 *pp_ex_or_batch = NULL;
1120 *got_level2 = false;
1121 *got_no_oplock = false;
1122
1123 /* Ignore stat or internal opens, as is done in
1124 delay_for_batch_oplocks() and
1125 delay_for_exclusive_oplocks().
1126 */
1127 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1128 return;
1129 }
1130
1131 for (i=0; i<lck->data->num_share_modes; i++) {
1132 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1133 continue;
1134 }
1135
1136 if (lck->data->share_modes[i].op_type == NO_OPLOCK &&
1137 is_stat_open(lck->data->share_modes[i].access_mask)) {
1138 /* We ignore stat opens in the table - they
1139 always have NO_OPLOCK and never get or
1140 cause breaks. JRA. */
1141 continue;
1142 }
1143
1144 if (BATCH_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1145 /* batch - can only be one. */
1146 if (share_mode_stale_pid(lck->data, i)) {
1147 DEBUG(10, ("Found stale batch oplock\n"));
1148 continue;
1149 }
1150 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1151 smb_panic("Bad batch oplock entry.");
1152 }
1153 *pp_batch = &lck->data->share_modes[i];
1154 }
1155
1156 if (EXCLUSIVE_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1157 if (share_mode_stale_pid(lck->data, i)) {
1158 DEBUG(10, ("Found stale duplicate oplock\n"));
1159 continue;
1160 }
1161 /* Exclusive or batch - can only be one. */
1162 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1163 smb_panic("Bad exclusive or batch oplock entry.");
1164 }
1165 *pp_ex_or_batch = &lck->data->share_modes[i];
1166 }
1167
1168 if (LEVEL_II_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1169 if (*pp_batch || *pp_ex_or_batch) {
1170 if (share_mode_stale_pid(lck->data, i)) {
1171 DEBUG(10, ("Found stale LevelII "
1172 "oplock\n"));
1173 continue;
1174 }
1175 smb_panic("Bad levelII oplock entry.");
1176 }
1177 *got_level2 = true;
1178 }
1179
1180 if (lck->data->share_modes[i].op_type == NO_OPLOCK) {
1181 if (*pp_batch || *pp_ex_or_batch) {
1182 if (share_mode_stale_pid(lck->data, i)) {
1183 DEBUG(10, ("Found stale NO_OPLOCK "
1184 "entry\n"));
1185 continue;
1186 }
1187 smb_panic("Bad no oplock entry.");
1188 }
1189 *got_no_oplock = true;
1190 }
1191 }
1192 }
1193
1194 static bool delay_for_batch_oplocks(files_struct *fsp,
1195 uint64_t mid,
1196 int oplock_request,
1197 struct share_mode_entry *batch_entry)
1198 {
1199 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1200 return false;
1201 }
1202 if (batch_entry == NULL) {
1203 return false;
1204 }
1205
1206 /* Found a batch oplock */
1207 send_break_message(fsp, batch_entry, mid, oplock_request);
1208 return true;
1209 }
1210
1211 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1212 uint64_t mid,
1213 int oplock_request,
1214 struct share_mode_entry *ex_entry)
1215 {
1216 bool delay_it;
1217
1218 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1219 return false;
1220 }
1221 if (ex_entry == NULL) {
1222 return false;
1223 }
1224
1225 /* Found an exclusive or batch oplock */
1226
1227 delay_it = is_delete_request(fsp) ?
1228 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1229
1230 if (!delay_it) {
1231 return false;
1232 }
1233
1234 send_break_message(fsp, ex_entry, mid, oplock_request);
1235 return true;
1236 }
1237
1238 static bool file_has_brlocks(files_struct *fsp)
1239 {
1240 struct byte_range_lock *br_lck;
1241
1242 br_lck = brl_get_locks_readonly(fsp);
1243 if (!br_lck)
1244 return false;
1245
1246 return br_lck->num_locks > 0 ? true : false;
1247 }
1248
1249 static void grant_fsp_oplock_type(files_struct *fsp,
1250 int oplock_request,
1251 bool got_level2_oplock,
1252 bool got_a_none_oplock)
1253 {
1254 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1255 lp_level2_oplocks(SNUM(fsp->conn));
1256
1257 /* Start by granting what the client asked for,
1258 but ensure no SAMBA_PRIVATE bits can be set. */
1259 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1260
1261 if (oplock_request & INTERNAL_OPEN_ONLY) {
1262 /* No oplocks on internal open. */
1263 fsp->oplock_type = NO_OPLOCK;
1264 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1265 fsp->oplock_type, fsp_str_dbg(fsp)));
1266 return;
1267 } else if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1268 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1269 fsp_str_dbg(fsp)));
1270 fsp->oplock_type = NO_OPLOCK;
1271 }
1272
1273 if (is_stat_open(fsp->access_mask)) {
1274 /* Leave the value already set. */
1275 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1276 fsp->oplock_type, fsp_str_dbg(fsp)));
1277 return;
1278 }
1279
1280 /*
1281 * Match what was requested (fsp->oplock_type) with
1282 * what was found in the existing share modes.
1283 */
1284
1285 if (got_a_none_oplock) {
1286 fsp->oplock_type = NO_OPLOCK;
1287 } else if (got_level2_oplock) {
1288 if (fsp->oplock_type == NO_OPLOCK ||
1289 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1290 /* Store a level2 oplock, but don't tell the client */
1291 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1292 } else {
1293 fsp->oplock_type = LEVEL_II_OPLOCK;
1294 }
1295 } else {
1296 /* All share_mode_entries are placeholders or deferred.
1297 * Silently upgrade to fake levelII if the client didn't
1298 * ask for an oplock. */
1299 if (fsp->oplock_type == NO_OPLOCK) {
1300 /* Store a level2 oplock, but don't tell the client */
1301 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1302 }
1303 }
1304
1305 /*
1306 * Don't grant level2 to clients that don't want them
1307 * or if we've turned them off.
1308 */
1309 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1310 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1311 }
1312
1313 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1314 fsp->oplock_type, fsp_str_dbg(fsp)));
1315 }
1316
1317 bool request_timed_out(struct timeval request_time,
1318 struct timeval timeout)
1319 {
1320 struct timeval now, end_time;
1321 GetTimeOfDay(&now);
1322 end_time = timeval_sum(&request_time, &timeout);
1323 return (timeval_compare(&end_time, &now) < 0);
1324 }
1325
1326 /****************************************************************************
1327 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1328 ****************************************************************************/
1329
1330 static void defer_open(struct share_mode_lock *lck,
1331 struct timeval request_time,
1332 struct timeval timeout,
1333 struct smb_request *req,
1334 struct deferred_open_record *state)
1335 {
1336 struct server_id self = messaging_server_id(req->sconn->msg_ctx);
1337 int i;
1338
1339 /* Paranoia check */
1340
1341 for (i=0; i<lck->data->num_share_modes; i++) {
1342 struct share_mode_entry *e = &lck->data->share_modes[i];
1343
1344 if (is_deferred_open_entry(e) &&
1345 procid_equal(&self, &e->pid) &&
1346 (e->op_mid == req->mid)) {
1347 DEBUG(0, ("Trying to defer an already deferred "
1348 "request: mid=%llu, exiting\n",
1349 (unsigned long long)req->mid));
1350 exit_server("attempt to defer a deferred request");
1351 }
1352 }
1353
1354 /* End paranoia check */
1355
1356 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1357 "open entry for mid %llu\n",
1358 (unsigned int)request_time.tv_sec,
1359 (unsigned int)request_time.tv_usec,
1360 (unsigned long long)req->mid));
1361
1362 if (!push_deferred_open_message_smb(req, request_time, timeout,
1363 state->id, (char *)state, sizeof(*state))) {
1364 exit_server("push_deferred_open_message_smb failed");
1365 }
1366 add_deferred_open(lck, req->mid, request_time, self, state->id);
1367 }
1368
1369
1370 /****************************************************************************
1371 On overwrite open ensure that the attributes match.
1372 ****************************************************************************/
1373
1374 bool open_match_attributes(connection_struct *conn,
1375 uint32 old_dos_attr,
1376 uint32 new_dos_attr,
1377 mode_t existing_unx_mode,
1378 mode_t new_unx_mode,
1379 mode_t *returned_unx_mode)
1380 {
1381 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1382
1383 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1384 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1385
1386 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1387 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1388 *returned_unx_mode = new_unx_mode;
1389 } else {
1390 *returned_unx_mode = (mode_t)0;
1391 }
1392
1393 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1394 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1395 "returned_unx_mode = 0%o\n",
1396 (unsigned int)old_dos_attr,
1397 (unsigned int)existing_unx_mode,
1398 (unsigned int)new_dos_attr,
1399 (unsigned int)*returned_unx_mode ));
1400
1401 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1402 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1403 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1404 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1405 return False;
1406 }
1407 }
1408 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1409 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1410 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1411 return False;
1412 }
1413 }
1414 return True;
1415 }
1416
1417 /****************************************************************************
1418 Special FCB or DOS processing in the case of a sharing violation.
1419 Try and find a duplicated file handle.
1420 ****************************************************************************/
1421
1422 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
1423 connection_struct *conn,
1424 files_struct *fsp_to_dup_into,
1425 const struct smb_filename *smb_fname,
1426 struct file_id id,
1427 uint16 file_pid,
1428 uint64_t vuid,
1429 uint32 access_mask,
1430 uint32 share_access,
1431 uint32 create_options)
1432 {
1433 files_struct *fsp;
1434
1435 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1436 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1437
1438 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1439 fsp = file_find_di_next(fsp)) {
1440
1441 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1442 "vuid = %llu, file_pid = %u, private_options = 0x%x "
1443 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1444 fsp->fh->fd, (unsigned long long)fsp->vuid,
1445 (unsigned int)fsp->file_pid,
1446 (unsigned int)fsp->fh->private_options,
1447 (unsigned int)fsp->access_mask ));
1448
1449 if (fsp->fh->fd != -1 &&
1450 fsp->vuid == vuid &&
1451 fsp->file_pid == file_pid &&
1452 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1453 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1454 (fsp->access_mask & FILE_WRITE_DATA) &&
1455 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1456 strequal(fsp->fsp_name->stream_name,
1457 smb_fname->stream_name)) {
1458 DEBUG(10,("fcb_or_dos_open: file match\n"));
1459 break;
1460 }
1461 }
1462
1463 if (!fsp) {
1464 return NT_STATUS_NOT_FOUND;
1465 }
1466
1467 /* quite an insane set of semantics ... */
1468 if (is_executable(smb_fname->base_name) &&
1469 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1470 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1471 return NT_STATUS_INVALID_PARAMETER;
1472 }
1473
1474 /* We need to duplicate this fsp. */
1475 return dup_file_fsp(req, fsp, access_mask, share_access,
1476 create_options, fsp_to_dup_into);
1477 }
1478
1479 static void schedule_defer_open(struct share_mode_lock *lck,
1480 struct timeval request_time,
1481 struct smb_request *req)
1482 {
1483 struct deferred_open_record state;
1484
1485 /* This is a relative time, added to the absolute
1486 request_time value to get the absolute timeout time.
1487 Note that if this is the second or greater time we enter
1488 this codepath for this particular request mid then
1489 request_time is left as the absolute time of the *first*
1490 time this request mid was processed. This is what allows
1491 the request to eventually time out. */
1492
1493 struct timeval timeout;
1494
1495 /* Normally the smbd we asked should respond within
1496 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1497 * the client did, give twice the timeout as a safety
1498 * measure here in case the other smbd is stuck
1499 * somewhere else. */
1500
1501 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1502
1503 /* Nothing actually uses state.delayed_for_oplocks
1504 but it's handy to differentiate in debug messages
1505 between a 30 second delay due to oplock break, and
1506 a 1 second delay for share mode conflicts. */
1507
1508 state.delayed_for_oplocks = True;
1509 state.id = lck->data->id;
1510
1511 if (!request_timed_out(request_time, timeout)) {
1512 defer_open(lck, request_time, timeout, req, &state);
1513 }
1514 }
1515
1516 /****************************************************************************
1517 Work out what access_mask to use from what the client sent us.
1518 ****************************************************************************/
1519
1520 static NTSTATUS smbd_calculate_maximum_allowed_access(
1521 connection_struct *conn,
1522 const struct smb_filename *smb_fname,
1523 uint32_t *p_access_mask)
1524 {
1525 struct security_descriptor *sd;
1526 uint32_t access_granted;
1527 NTSTATUS status;
1528
1529 if (get_current_uid(conn) == (uid_t)0) {
1530 *p_access_mask |= FILE_GENERIC_ALL;
1531 return NT_STATUS_OK;
1532 }
1533
1534 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1535 (SECINFO_OWNER |
1536 SECINFO_GROUP |
1537 SECINFO_DACL),&sd);
1538
1539 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1540 /*
1541 * File did not exist
1542 */
1543 *p_access_mask = FILE_GENERIC_ALL;
1544 return NT_STATUS_OK;
1545 }
1546 if (!NT_STATUS_IS_OK(status)) {
1547 DEBUG(10,("smbd_calculate_access_mask: "
1548 "Could not get acl on file %s: %s\n",
1549 smb_fname_str_dbg(smb_fname),
1550 nt_errstr(status)));
1551 return NT_STATUS_ACCESS_DENIED;
1552 }
1553
1554 /*
1555 * Never test FILE_READ_ATTRIBUTES. se_access_check()
1556 * also takes care of owner WRITE_DAC and READ_CONTROL.
1557 */
1558 status = se_access_check(sd,
1559 get_current_nttok(conn),
1560 (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1561 &access_granted);
1562
1563 TALLOC_FREE(sd);
1564
1565 if (!NT_STATUS_IS_OK(status)) {
1566 DEBUG(10, ("smbd_calculate_access_mask: "
1567 "Access denied on file %s: "
1568 "when calculating maximum access\n",
1569 smb_fname_str_dbg(smb_fname)));
1570 return NT_STATUS_ACCESS_DENIED;
1571 }
1572 *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1573 return NT_STATUS_OK;
1574 }
1575
1576 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1577 const struct smb_filename *smb_fname,
1578 uint32_t access_mask,
1579 uint32_t *access_mask_out)
1580 {
1581 NTSTATUS status;
1582 uint32_t orig_access_mask = access_mask;
1583 uint32_t rejected_share_access;
1584
1585 /*
1586 * Convert GENERIC bits to specific bits.
1587 */
1588
1589 se_map_generic(&access_mask, &file_generic_mapping);
1590
1591 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1592 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1593
1594 status = smbd_calculate_maximum_allowed_access(
1595 conn, smb_fname, &access_mask);
1596
1597 if (!NT_STATUS_IS_OK(status)) {
1598 return status;
1599 }
1600
1601 access_mask &= conn->share_access;
1602 }
1603
1604 rejected_share_access = access_mask & ~(conn->share_access);
1605
1606 if (rejected_share_access) {
1607 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1608 "file %s: rejected by share access mask[0x%08X] "
1609 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1610 smb_fname_str_dbg(smb_fname),
1611 conn->share_access,
1612 orig_access_mask, access_mask,
1613 rejected_share_access));
1614 return NT_STATUS_ACCESS_DENIED;
1615 }
1616
1617 *access_mask_out = access_mask;
1618 return NT_STATUS_OK;
1619 }
1620
1621 /****************************************************************************
1622 Remove the deferred open entry under lock.
1623 ****************************************************************************/
1624
1625 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1626 struct server_id pid)
1627 {
1628 struct share_mode_lock *lck = get_existing_share_mode_lock(
1629 talloc_tos(), id);
1630 if (lck == NULL) {
1631 DEBUG(0, ("could not get share mode lock\n"));
1632 return;
1633 }
1634 del_deferred_open_entry(lck, mid, pid);
1635 TALLOC_FREE(lck);
1636 }
1637
1638 /****************************************************************************
1639 Open a file with a share mode. Passed in an already created files_struct *.
1640 ****************************************************************************/
1641
1642 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1643 struct smb_request *req,
1644 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1645 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1646 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1647 uint32 create_options, /* options such as delete on close. */
1648 uint32 new_dos_attributes, /* attributes used for new file. */
1649 int oplock_request, /* internal Samba oplock codes. */
1650 /* Information (FILE_EXISTS etc.) */
1651 uint32_t private_flags, /* Samba specific flags. */
1652 int *pinfo,
1653 files_struct *fsp)
1654 {
1655 struct smb_filename *smb_fname = fsp->fsp_name;
1656 int flags=0;
1657 int flags2=0;
1658 bool file_existed = VALID_STAT(smb_fname->st);
1659 bool def_acl = False;
1660 bool posix_open = False;
1661 bool new_file_created = False;
1662 bool clear_ads = false;
1663 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1664 mode_t new_unx_mode = (mode_t)0;
1665 mode_t unx_mode = (mode_t)0;
1666 int info;
1667 uint32 existing_dos_attributes = 0;
1668 struct timeval request_time = timeval_zero();
1669 struct share_mode_lock *lck = NULL;
1670 uint32 open_access_mask = access_mask;
1671 NTSTATUS status;
1672 char *parent_dir;
1673
1674 if (conn->printer) {
1675 /*
1676 * Printers are handled completely differently.
1677 * Most of the passed parameters are ignored.
1678 */
1679
1680 if (pinfo) {
1681 *pinfo = FILE_WAS_CREATED;
1682 }
1683
1684 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1685 smb_fname_str_dbg(smb_fname)));
1686
1687 if (!req) {
1688 DEBUG(0,("open_file_ntcreate: printer open without "
1689 "an SMB request!\n"));
1690 return NT_STATUS_INTERNAL_ERROR;
1691 }
1692
1693 return print_spool_open(fsp, smb_fname->base_name,
1694 req->vuid);
1695 }
1696
1697 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1698 NULL)) {
1699 return NT_STATUS_NO_MEMORY;
1700 }
1701
1702 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1703 posix_open = True;
1704 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1705 new_dos_attributes = 0;
1706 } else {
1707 /* Windows allows a new file to be created and
1708 silently removes a FILE_ATTRIBUTE_DIRECTORY
1709 sent by the client. Do the same. */
1710
1711 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1712
1713 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1714 * created new. */
1715 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1716 smb_fname, parent_dir);
1717 }
1718
1719 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1720 "access_mask=0x%x share_access=0x%x "
1721 "create_disposition = 0x%x create_options=0x%x "
1722 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1723 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1724 access_mask, share_access, create_disposition,
1725 create_options, (unsigned int)unx_mode, oplock_request,
1726 (unsigned int)private_flags));
1727
1728 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1729 DEBUG(0, ("No smb request but not an internal only open!\n"));
1730 return NT_STATUS_INTERNAL_ERROR;
1731 }
1732
1733 /*
1734 * Only non-internal opens can be deferred at all
1735 */
1736
1737 if (req) {
1738 void *ptr;
1739 if (get_deferred_open_message_state(req,
1740 &request_time,
1741 &ptr)) {
1742
1743 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1744 /* Remember the absolute time of the original
1745 request with this mid. We'll use it later to
1746 see if this has timed out. */
1747
1748 /* Remove the deferred open entry under lock. */
1749 remove_deferred_open_entry(
1750 state->id, req->mid,
1751 messaging_server_id(req->sconn->msg_ctx));
1752
1753 /* Ensure we don't reprocess this message. */
1754 remove_deferred_open_message_smb(req->sconn, req->mid);
1755 }
1756 }
1757
1758 if (!posix_open) {
1759 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1760 if (file_existed) {
1761 existing_dos_attributes = dos_mode(conn, smb_fname);
1762 }
1763 }
1764
1765 /* ignore any oplock requests if oplocks are disabled */
1766 if (!lp_oplocks(SNUM(conn)) ||
1767 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1768 /* Mask off everything except the private Samba bits. */
1769 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1770 }
1771
1772 /* this is for OS/2 long file names - say we don't support them */
1773 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1774 /* OS/2 Workplace shell fix may be main code stream in a later
1775 * release. */
1776 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1777 "supported.\n"));
1778 if (use_nt_status()) {
1779 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1780 }
1781 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1782 }
1783
1784 switch( create_disposition ) {
1785 /*
1786 * Currently we're using FILE_SUPERSEDE as the same as
1787 * FILE_OVERWRITE_IF but they really are
1788 * different. FILE_SUPERSEDE deletes an existing file
1789 * (requiring delete access) then recreates it.
1790 */
1791 case FILE_SUPERSEDE:
1792 /* If file exists replace/overwrite. If file doesn't
1793 * exist create. */
1794 flags2 |= (O_CREAT | O_TRUNC);
1795 clear_ads = true;
1796 break;
1797
1798 case FILE_OVERWRITE_IF:
1799 /* If file exists replace/overwrite. If file doesn't
1800 * exist create. */
1801 flags2 |= (O_CREAT | O_TRUNC);
1802 clear_ads = true;
1803 break;
1804
1805 case FILE_OPEN:
1806 /* If file exists open. If file doesn't exist error. */
1807 if (!file_existed) {
1808 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1809 "requested for file %s and file "
1810 "doesn't exist.\n",
1811 smb_fname_str_dbg(smb_fname)));
1812 errno = ENOENT;
1813 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1814 }
1815 break;
1816
1817 case FILE_OVERWRITE:
1818 /* If file exists overwrite. If file doesn't exist
1819 * error. */
1820 if (!file_existed) {
1821 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1822 "requested for file %s and file "
1823 "doesn't exist.\n",
1824 smb_fname_str_dbg(smb_fname) ));
1825 errno = ENOENT;
1826 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1827 }
1828 flags2 |= O_TRUNC;
1829 clear_ads = true;
1830 break;
1831
1832 case FILE_CREATE:
1833 /* If file exists error. If file doesn't exist
1834 * create. */
1835 if (file_existed) {
1836 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1837 "requested for file %s and file "
1838 "already exists.\n",
1839 smb_fname_str_dbg(smb_fname)));
1840 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1841 errno = EISDIR;
1842 } else {
1843 errno = EEXIST;
1844 }
1845 return map_nt_error_from_unix(errno);
1846 }
1847 flags2 |= (O_CREAT|O_EXCL);
1848 break;
1849
1850 case FILE_OPEN_IF:
1851 /* If file exists open. If file doesn't exist
1852 * create. */
1853 flags2 |= O_CREAT;
1854 break;
1855
1856 default:
1857 return NT_STATUS_INVALID_PARAMETER;
1858 }
1859
1860 /* We only care about matching attributes on file exists and
1861 * overwrite. */
1862
1863 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1864 (create_disposition == FILE_OVERWRITE_IF))) {
1865 if (!open_match_attributes(conn, existing_dos_attributes,
1866 new_dos_attributes,
1867 smb_fname->st.st_ex_mode,
1868 unx_mode, &new_unx_mode)) {
1869 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1870 "for file %s (%x %x) (0%o, 0%o)\n",
1871 smb_fname_str_dbg(smb_fname),
1872 existing_dos_attributes,
1873 new_dos_attributes,
1874 (unsigned int)smb_fname->st.st_ex_mode,
1875 (unsigned int)unx_mode ));
1876 errno = EACCES;
1877 return NT_STATUS_ACCESS_DENIED;
1878 }
1879 }
1880
1881 status = smbd_calculate_access_mask(conn, smb_fname,
1882 access_mask,
1883 &access_mask);
1884 if (!NT_STATUS_IS_OK(status)) {
1885 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1886 "on file %s returned %s\n",
1887 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1888 return status;
1889 }
1890
1891 open_access_mask = access_mask;
1892
1893 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1894 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1895 }
1896
1897 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1898 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1899 access_mask));
1900
1901 /*
1902 * Note that we ignore the append flag as append does not
1903 * mean the same thing under DOS and Unix.
1904 */
1905
1906 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1907 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1908 /* DENY_DOS opens are always underlying read-write on the
1909 file handle, no matter what the requested access mask
1910 says. */
1911 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1912 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1913 flags = O_RDWR;
1914 } else {
1915 flags = O_WRONLY;
1916 }
1917 } else {
1918 flags = O_RDONLY;
1919 }
1920
1921 /*
1922 * Currently we only look at FILE_WRITE_THROUGH for create options.
1923 */
1924
1925 #if defined(O_SYNC)
1926 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1927 flags2 |= O_SYNC;
1928 }
1929 #endif /* O_SYNC */
1930
1931 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1932 flags2 |= O_APPEND;
1933 }
1934
1935 if (!posix_open && !CAN_WRITE(conn)) {
1936 /*
1937 * We should really return a permission denied error if either
1938 * O_CREAT or O_TRUNC are set, but for compatibility with
1939 * older versions of Samba we just AND them out.
1940 */
1941 flags2 &= ~(O_CREAT|O_TRUNC);
1942 }
1943
1944 /*
1945 * Ensure we can't write on a read-only share or file.
1946 */
1947
1948 if (flags != O_RDONLY && file_existed &&
1949 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1950 DEBUG(5,("open_file_ntcreate: write access requested for "
1951 "file %s on read only %s\n",
1952 smb_fname_str_dbg(smb_fname),
1953 !CAN_WRITE(conn) ? "share" : "file" ));
1954 errno = EACCES;
1955 return NT_STATUS_ACCESS_DENIED;
1956 }
1957
1958 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1959 fsp->share_access = share_access;
1960 fsp->fh->private_options = private_flags;
1961 fsp->access_mask = open_access_mask; /* We change this to the
1962 * requested access_mask after
1963 * the open is done. */
1964 fsp->posix_open = posix_open;
1965
1966 /* Ensure no SAMBA_PRIVATE bits can be set. */
1967 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1968
1969 if (timeval_is_zero(&request_time)) {
1970 request_time = fsp->open_time;
1971 }
1972
1973 if (file_existed) {
1974 struct share_mode_entry *batch_entry = NULL;
1975 struct share_mode_entry *exclusive_entry = NULL;
1976 bool got_level2_oplock = false;
1977 bool got_a_none_oplock = false;
1978 struct file_id id;
1979
1980 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1981 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1982
1983 lck = get_share_mode_lock(talloc_tos(), id,
1984 conn->connectpath,
1985 smb_fname, &old_write_time);
1986 if (lck == NULL) {
1987 DEBUG(0, ("Could not get share mode lock\n"));
1988 return NT_STATUS_SHARING_VIOLATION;
1989 }
1990
1991 /* Get the types we need to examine. */
1992 find_oplock_types(fsp,
1993 oplock_request,
1994 lck,
1995 &batch_entry,
1996 &exclusive_entry,
1997 &got_level2_oplock,
1998 &got_a_none_oplock);
1999
2000 /* First pass - send break only on batch oplocks. */
2001 if ((req != NULL) &&
2002 delay_for_batch_oplocks(fsp,
2003 req->mid,
2004 oplock_request,
2005 batch_entry)) {
2006 schedule_defer_open(lck, request_time, req);
2007 TALLOC_FREE(lck);
2008 return NT_STATUS_SHARING_VIOLATION;
2009 }
2010
2011 /* Use the client requested access mask here, not the one we
2012 * open with. */
2013 status = open_mode_check(conn, lck, fsp->name_hash,
2014 access_mask, share_access,
2015 create_options, &file_existed);
2016
2017 if (NT_STATUS_IS_OK(status)) {
2018 /* We might be going to allow this open. Check oplock
2019 * status again. */
2020 /* Second pass - send break for both batch or
2021 * exclusive oplocks. */
2022 if ((req != NULL) &&
2023 delay_for_exclusive_oplocks(
2024 fsp,
2025 req->mid,
2026 oplock_request,
2027 exclusive_entry)) {
2028 schedule_defer_open(lck, request_time, req);
2029 TALLOC_FREE(lck);
2030 return NT_STATUS_SHARING_VIOLATION;
2031 }
2032 }
2033
2034 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2035 /* DELETE_PENDING is not deferred for a second */
2036 TALLOC_FREE(lck);
2037 return status;
2038 }
2039
2040 grant_fsp_oplock_type(fsp,
2041 oplock_request,
2042 got_level2_oplock,
2043 got_a_none_oplock);
2044
2045 if (!NT_STATUS_IS_OK(status)) {
2046 uint32 can_access_mask;
2047 bool can_access = True;
2048
2049 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2050
2051 /* Check if this can be done with the deny_dos and fcb
2052 * calls. */
2053 if (private_flags &
2054 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2055 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2056 if (req == NULL) {
2057 DEBUG(0, ("DOS open without an SMB "
2058 "request!\n"));
2059 TALLOC_FREE(lck);
2060 return NT_STATUS_INTERNAL_ERROR;
2061 }
2062
2063 /* Use the client requested access mask here,
2064 * not the one we open with. */
2065 status = fcb_or_dos_open(req,
2066 conn,
2067 fsp,
2068 smb_fname,
2069 id,
2070 req->smbpid,
2071 req->vuid,
2072 access_mask,
2073 share_access,
2074 create_options);
2075
2076 if (NT_STATUS_IS_OK(status)) {
2077 TALLOC_FREE(lck);
2078 if (pinfo) {
2079 *pinfo = FILE_WAS_OPENED;
2080 }
2081 return NT_STATUS_OK;
2082 }
2083 }
2084
2085 /*
2086 * This next line is a subtlety we need for
2087 * MS-Access. If a file open will fail due to share
2088 * permissions and also for security (access) reasons,
2089 * we need to return the access failed error, not the
2090 * share error. We can't open the file due to kernel
2091 * oplock deadlock (it's possible we failed above on
2092 * the open_mode_check()) so use a userspace check.
2093 */
2094
2095 if (flags & O_RDWR) {
2096 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2097 } else if (flags & O_WRONLY) {
2098 can_access_mask = FILE_WRITE_DATA;
2099 } else {
2100 can_access_mask = FILE_READ_DATA;
2101 }
2102
2103 if (((can_access_mask & FILE_WRITE_DATA) &&
2104 !CAN_WRITE(conn)) ||
2105 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2106 smb_fname, can_access_mask))) {
2107 can_access = False;
2108 }
2109
2110 /*
2111 * If we're returning a share violation, ensure we
2112 * cope with the braindead 1 second delay.
2113 */
2114
2115 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2116 lp_defer_sharing_violations()) {
2117 struct timeval timeout;
2118 struct deferred_open_record state;
2119 int timeout_usecs;
2120
2121 /* this is a hack to speed up torture tests
2122 in 'make test' */
2123 timeout_usecs = lp_parm_int(SNUM(conn),
2124 "smbd","sharedelay",
2125 SHARING_VIOLATION_USEC_WAIT);
2126
2127 /* This is a relative time, added to the absolute
2128 request_time value to get the absolute timeout time.
2129 Note that if this is the second or greater time we enter
2130 this codepath for this particular request mid then
2131 request_time is left as the absolute time of the *first*
2132 time this request mid was processed. This is what allows
2133 the request to eventually time out. */
2134
2135 timeout = timeval_set(0, timeout_usecs);
2136
2137 /* Nothing actually uses state.delayed_for_oplocks
2138 but it's handy to differentiate in debug messages
2139 between a 30 second delay due to oplock break, and
2140 a 1 second delay for share mode conflicts. */
2141
2142 state.delayed_for_oplocks = False;
2143 state.id = id;
2144
2145 if ((req != NULL)
2146 && !request_timed_out(request_time,
2147 timeout)) {
2148 defer_open(lck, request_time, timeout,
2149 req, &state);
2150 }
2151 }
2152
2153 TALLOC_FREE(lck);
2154 if (can_access) {
2155 /*
2156 * We have detected a sharing violation here
2157 * so return the correct error code
2158 */
2159 status = NT_STATUS_SHARING_VIOLATION;
2160 } else {
2161 status = NT_STATUS_ACCESS_DENIED;
2162 }
2163 return status;
2164 }
2165
2166 /*
2167 * We exit this block with the share entry *locked*.....
2168 */
2169 }
2170
2171 SMB_ASSERT(!file_existed || (lck != NULL));
2172
2173 /*
2174 * Ensure we pay attention to default ACLs on directories if required.
2175 */
2176
2177 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2178 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2179 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2180 }
2181
2182 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2183 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2184 (unsigned int)flags, (unsigned int)flags2,
2185 (unsigned int)unx_mode, (unsigned int)access_mask,
2186 (unsigned int)open_access_mask));
2187
2188 /*
2189 * open_file strips any O_TRUNC flags itself.
2190 */
2191
2192 fsp_open = open_file(fsp, conn, req, parent_dir,
2193 flags|flags2, unx_mode, access_mask,
2194 open_access_mask);
2195
2196 if (!NT_STATUS_IS_OK(fsp_open)) {
2197 TALLOC_FREE(lck);
2198 return fsp_open;
2199 }
2200
2201 if (!file_existed) {
2202 struct share_mode_entry *batch_entry = NULL;
2203 struct share_mode_entry *exclusive_entry = NULL;
2204 bool got_level2_oplock = false;
2205 bool got_a_none_oplock = false;
2206 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2207 struct file_id id;
2208 /*
2209 * Deal with the race condition where two smbd's detect the
2210 * file doesn't exist and do the create at the same time. One
2211 * of them will win and set a share mode, the other (ie. this
2212 * one) should check if the requested share mode for this
2213 * create is allowed.
2214 */
2215
2216 /*
2217 * Now the file exists and fsp is successfully opened,
2218 * fsp->dev and fsp->inode are valid and should replace the
2219 * dev=0,inode=0 from a non existent file. Spotted by
2220 * Nadav Danieli <nadavd@exanet.com>. JRA.
2221 */
2222
2223 id = fsp->file_id;
2224
2225 lck = get_share_mode_lock(talloc_tos(), id,
2226 conn->connectpath,
2227 smb_fname, &old_write_time);
2228
2229 if (lck == NULL) {
2230 DEBUG(0, ("open_file_ntcreate: Could not get share "
2231 "mode lock for %s\n",
2232 smb_fname_str_dbg(smb_fname)));
2233 fd_close(fsp);
2234 return NT_STATUS_SHARING_VIOLATION;
2235 }
2236
2237 /* Get the types we need to examine. */
2238 find_oplock_types(fsp,
2239 oplock_request,
2240 lck,
2241 &batch_entry,
2242 &exclusive_entry,
2243 &got_level2_oplock,
2244 &got_a_none_oplock);
2245
2246 /* First pass - send break only on batch oplocks. */
2247 if ((req != NULL) &&
2248 delay_for_batch_oplocks(fsp,
2249 req->mid,
2250 oplock_request,
2251 batch_entry)) {
2252 schedule_defer_open(lck, request_time, req);
2253 TALLOC_FREE(lck);
2254 fd_close(fsp);
2255 return NT_STATUS_SHARING_VIOLATION;
2256 }
2257
2258 status = open_mode_check(conn, lck, fsp->name_hash,
2259 access_mask, share_access,
2260 create_options, &file_existed);
2261
2262 if (NT_STATUS_IS_OK(status)) {
2263 /* We might be going to allow this open. Check oplock
2264 * status again. */
2265 /* Second pass - send break for both batch or
2266 * exclusive oplocks. */
2267 if ((req != NULL) &&
2268 delay_for_exclusive_oplocks(
2269 fsp,
2270 req->mid,
2271 oplock_request,
2272 exclusive_entry)) {
2273 schedule_defer_open(lck, request_time, req);
2274 TALLOC_FREE(lck);
2275 fd_close(fsp);
2276 return NT_STATUS_SHARING_VIOLATION;
2277 }
2278 }
2279
2280 if (!NT_STATUS_IS_OK(status)) {
2281 struct deferred_open_record state;
2282
2283 state.delayed_for_oplocks = False;
2284 state.id = id;
2285
2286 /* Do it all over again immediately. In the second
2287 * round we will find that the file existed and handle
2288 * the DELETE_PENDING and FCB cases correctly. No need
2289 * to duplicate the code here. Essentially this is a
2290 * "goto top of this function", but don't tell
2291 * anybody... */
2292
2293 if (req != NULL) {
2294 defer_open(lck, request_time, timeval_zero(),
2295 req, &state);
2296 }
2297 TALLOC_FREE(lck);
2298 fd_close(fsp);
2299 return status;
2300 }
2301
2302 grant_fsp_oplock_type(fsp,
2303 oplock_request,
2304 got_level2_oplock,
2305 got_a_none_oplock);
2306
2307 /*
2308 * We exit this block with the share entry *locked*.....
2309 */
2310
2311 }
2312
2313 SMB_ASSERT(lck != NULL);
2314
2315 /* Delete streams if create_disposition requires it */
2316 if (file_existed && clear_ads &&
2317 !is_ntfs_stream_smb_fname(smb_fname)) {
2318 status = delete_all_streams(conn, smb_fname->base_name);
2319 if (!NT_STATUS_IS_OK(status)) {
2320 TALLOC_FREE(lck);
2321 fd_close(fsp);
2322 return status;
2323 }
2324 }
2325
2326 /* note that we ignore failure for the following. It is
2327 basically a hack for NFS, and NFS will never set one of
2328 these only read them. Nobody but Samba can ever set a deny
2329 mode and we have already checked our more authoritative
2330 locking database for permission to set this deny mode. If
2331 the kernel refuses the operations then the kernel is wrong.
2332 note that GPFS supports it as well - jmcd */
2333
2334 if (fsp->fh->fd != -1) {
2335 int ret_flock;
2336 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2337 if(ret_flock == -1 ){
2338
2339 TALLOC_FREE(lck);
2340 fd_close(fsp);
2341
2342 return NT_STATUS_SHARING_VIOLATION;
2343 }
2344 }
2345
2346 /*
2347 * At this point onwards, we can guarentee that the share entry
2348 * is locked, whether we created the file or not, and that the
2349 * deny mode is compatible with all current opens.
2350 */
2351
2352 /*
2353 * If requested, truncate the file.
2354 */
2355
2356 if (file_existed && (flags2&O_TRUNC)) {
2357 /*
2358 * We are modifing the file after open - update the stat
2359 * struct..
2360 */
2361 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2362 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2363 status = map_nt_error_from_unix(errno);
2364 TALLOC_FREE(lck);
2365 fd_close(fsp);
2366 return status;
2367 }
2368 }
2369
2370 /*
2371 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2372 * but we don't have to store this - just ignore it on access check.
2373 */
2374 if (conn->sconn->using_smb2) {
2375 /*
2376 * SMB2 doesn't return it (according to Microsoft tests).
2377 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2378 * File created with access = 0x7 (Read, Write, Delete)
2379 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2380 */
2381 fsp->access_mask = access_mask;
2382 } else {
2383 /* But SMB1 does. */
2384 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2385 }
2386
2387 if (file_existed) {
2388 /* stat opens on existing files don't get oplocks. */
2389 if (is_stat_open(open_access_mask)) {
2390 fsp->oplock_type = NO_OPLOCK;
2391 }
2392
2393 if (flags2 & O_TRUNC) {
2394 info = FILE_WAS_OVERWRITTEN;
2395 } else {
2396 info = FILE_WAS_OPENED;
2397 }
2398 } else {
2399 info = FILE_WAS_CREATED;
2400 }
2401
2402 if (pinfo) {
2403 *pinfo = info;
2404 }
2405
2406 /*
2407 * Setup the oplock info in both the shared memory and
2408 * file structs.
2409 */
2410
2411 status = set_file_oplock(fsp, fsp->oplock_type);
2412 if (!NT_STATUS_IS_OK(status)) {
2413 /*
2414 * Could not get the kernel oplock or there are byte-range
2415 * locks on the file.
2416 */
2417 fsp->oplock_type = NO_OPLOCK;
2418 }
2419
2420 set_share_mode(lck, fsp, get_current_uid(conn),
2421 req ? req->mid : 0,
2422 fsp->oplock_type);
2423
2424 /* Handle strange delete on close create semantics. */
2425 if (create_options & FILE_DELETE_ON_CLOSE) {
2426
2427 status = can_set_delete_on_close(fsp, new_dos_attributes);
2428
2429 if (!NT_STATUS_IS_OK(status)) {
2430 /* Remember to delete the mode we just added. */
2431 del_share_mode(lck, fsp);
2432 TALLOC_FREE(lck);
2433 fd_close(fsp);
2434 return status;
2435 }
2436 /* Note that here we set the *inital* delete on close flag,
2437 not the regular one. The magic gets handled in close. */
2438 fsp->initial_delete_on_close = True;
2439 }
2440
2441 if (info == FILE_WAS_OVERWRITTEN
2442 || info == FILE_WAS_CREATED
2443 || info == FILE_WAS_SUPERSEDED) {
2444 new_file_created = True;
2445 }
2446
2447 if (new_file_created) {
2448 /* Files should be initially set as archive */
2449 if (lp_map_archive(SNUM(conn)) ||
2450 lp_store_dos_attributes(SNUM(conn))) {
2451 if (!posix_open) {
2452 if (file_set_dosmode(conn, smb_fname,
2453 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2454 parent_dir, true) == 0) {
2455 unx_mode = smb_fname->st.st_ex_mode;
2456 }
2457 }
2458 }
2459 }
2460
2461 /* Determine sparse flag. */
2462 if (posix_open) {
2463 /* POSIX opens are sparse by default. */
2464 fsp->is_sparse = true;
2465 } else {
2466 fsp->is_sparse = (file_existed &&
2467 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2468 }
2469
2470 /*
2471 * Take care of inherited ACLs on created files - if default ACL not
2472 * selected.
2473 */
2474
2475 if (!posix_open && !file_existed && !def_acl) {
2476
2477 int saved_errno = errno; /* We might get ENOSYS in the next
2478 * call.. */
2479
2480 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2481 errno == ENOSYS) {
2482 errno = saved_errno; /* Ignore ENOSYS */
2483 }
2484
2485 } else if (new_unx_mode) {
2486
2487 int ret = -1;
2488
2489 /* Attributes need changing. File already existed. */
2490
2491 {
2492 int saved_errno = errno; /* We might get ENOSYS in the
2493 * next call.. */
2494 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2495
2496 if (ret == -1 && errno == ENOSYS) {
2497 errno = saved_errno; /* Ignore ENOSYS */
2498 } else {
2499 DEBUG(5, ("open_file_ntcreate: reset "
2500 "attributes of file %s to 0%o\n",
2501 smb_fname_str_dbg(smb_fname),
2502 (unsigned int)new_unx_mode));
2503 ret = 0; /* Don't do the fchmod below. */
2504 }
2505 }
2506
2507 if ((ret == -1) &&
2508 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2509 DEBUG(5, ("open_file_ntcreate: failed to reset "
2510 "attributes of file %s to 0%o\n",
2511 smb_fname_str_dbg(smb_fname),
2512 (unsigned int)new_unx_mode));
2513 }
2514
2515 /* If this is a successful open, we must remove any deferred open
2516 * records. */
2517 if (req != NULL) {
2518 del_deferred_open_entry(lck, req->mid,
2519 messaging_server_id(req->sconn->msg_ctx));
2520 }
2521 TALLOC_FREE(lck);
2522
2523 return NT_STATUS_OK;
2524 }
2525
2526
2527 /****************************************************************************
2528 Open a file for for write to ensure that we can fchmod it.
2529 ****************************************************************************/
2530
2531 NTSTATUS open_file_fchmod(connection_struct *conn,
2532 struct smb_filename *smb_fname,
2533 files_struct **result)
2534 {
2535 if (!VALID_STAT(smb_fname->st)) {
2536 return NT_STATUS_INVALID_PARAMETER;
2537 }
2538
2539 return SMB_VFS_CREATE_FILE(
2540 conn, /* conn */
2541 NULL, /* req */
2542 0, /* root_dir_fid */
2543 smb_fname, /* fname */
2544 FILE_WRITE_DATA, /* access_mask */
2545 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2546 FILE_SHARE_DELETE),
2547 FILE_OPEN, /* create_disposition*/
2548 0, /* create_options */
2549 0, /* file_attributes */
2550 INTERNAL_OPEN_ONLY, /* oplock_request */
2551 0, /* allocation_size */
2552 0, /* private_flags */
2553 NULL, /* sd */
2554 NULL, /* ea_list */
2555 result, /* result */
2556 NULL); /* pinfo */
2557 }
2558
2559 static NTSTATUS mkdir_internal(connection_struct *conn,
2560 struct smb_filename *smb_dname,
2561 uint32 file_attributes)
2562 {
2563 mode_t mode;
2564 char *parent_dir = NULL;
2565 NTSTATUS status;
2566 bool posix_open = false;
2567 bool need_re_stat = false;
2568 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2569
2570 if(access_mask & ~(conn->share_access)) {
2571 DEBUG(5,("mkdir_internal: failing share access "
2572 "%s\n", lp_servicename(SNUM(conn))));
2573 return NT_STATUS_ACCESS_DENIED;
2574 }
2575
2576 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2577 NULL)) {
2578 return NT_STATUS_NO_MEMORY;
2579 }
2580
2581 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2582 posix_open = true;
2583 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2584 } else {
2585 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2586 }
2587
2588 status = check_parent_access(conn,
2589 smb_dname,
2590 access_mask);
2591 if(!NT_STATUS_IS_OK(status)) {
2592 DEBUG(5,("mkdir_internal: check_parent_access "
2593 "on directory %s for path %s returned %s\n",
2594 parent_dir,
2595 smb_dname->base_name,
2596 nt_errstr(status) ));
2597 return status;
2598 }
2599
2600 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2601 return map_nt_error_from_unix(errno);
2602 }
2603
2604 /* Ensure we're checking for a symlink here.... */
2605 /* We don't want to get caught by a symlink racer. */
2606
2607 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2608 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2609 smb_fname_str_dbg(smb_dname), strerror(errno)));
2610 return map_nt_error_from_unix(errno);
2611 }
2612
2613 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2614 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2615 smb_fname_str_dbg(smb_dname)));
2616 return NT_STATUS_NOT_A_DIRECTORY;
2617 }
2618
2619 if (lp_store_dos_attributes(SNUM(conn))) {
2620 if (!posix_open) {
2621 file_set_dosmode(conn, smb_dname,
2622 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2623 parent_dir, true);
2624 }
2625 }
2626
2627 if (lp_inherit_perms(SNUM(conn))) {
2628 inherit_access_posix_acl(conn, parent_dir,
2629 smb_dname->base_name, mode);
2630 need_re_stat = true;
2631 }
2632
2633 if (!posix_open) {
2634 /*
2635 * Check if high bits should have been set,
2636 * then (if bits are missing): add them.
2637 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2638 * dir.
2639 */
2640 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2641 (mode & ~smb_dname->st.st_ex_mode)) {
2642 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2643 (smb_dname->st.st_ex_mode |
2644 (mode & ~smb_dname->st.st_ex_mode)));
2645 need_re_stat = true;
2646 }
2647 }
2648
2649 /* Change the owner if required. */
2650 if (lp_inherit_owner(SNUM(conn))) {
2651 change_dir_owner_to_parent(conn, parent_dir,
2652 smb_dname->base_name,
2653 &smb_dname->st);
2654 need_re_stat = true;
2655 }
2656
2657 if (need_re_stat) {
2658 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2659 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2660 smb_fname_str_dbg(smb_dname), strerror(errno)));
2661 return map_nt_error_from_unix(errno);
2662 }
2663 }
2664
2665 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2666 smb_dname->base_name);
2667
2668 return NT_STATUS_OK;
2669 }
2670
2671 /****************************************************************************
2672 Ensure we didn't get symlink raced on opening a directory.
2673 ****************************************************************************/
2674
2675 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2676 const SMB_STRUCT_STAT *sbuf2)
2677 {
2678 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2679 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2680 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2681 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2682 return false;
2683 }
2684 return true;
2685 }
2686
2687 /****************************************************************************
2688 Open a directory from an NT SMB call.
2689 ****************************************************************************/
2690
2691 static NTSTATUS open_directory(connection_struct *conn,
2692 struct smb_request *req,
2693 struct smb_filename *smb_dname,
2694 uint32 access_mask,
2695 uint32 share_access,
2696 uint32 create_disposition,
2697 uint32 create_options,
2698 uint32 file_attributes,
2699 int *pinfo,
2700 files_struct **result)
2701 {
2702 files_struct *fsp = NULL;
2703 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2704 struct share_mode_lock *lck = NULL;
2705 NTSTATUS status;
2706 struct timespec mtimespec;
2707 int info = 0;
2708
2709 if (is_ntfs_stream_smb_fname(smb_dname)) {
2710 DEBUG(2, ("open_directory: %s is a stream name!\n",
2711 smb_fname_str_dbg(smb_dname)));
2712 return NT_STATUS_NOT_A_DIRECTORY;
2713 }
2714
2715 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2716 /* Ensure we have a directory attribute. */
2717 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2718 }
2719
2720 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2721 "share_access = 0x%x create_options = 0x%x, "
2722 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2723 smb_fname_str_dbg(smb_dname),
2724 (unsigned int)access_mask,
2725 (unsigned int)share_access,
2726 (unsigned int)create_options,
2727 (unsigned int)create_disposition,
2728 (unsigned int)file_attributes));
2729
2730 status = smbd_calculate_access_mask(conn, smb_dname,
2731 access_mask, &access_mask);
2732 if (!NT_STATUS_IS_OK(status)) {
2733 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2734 "on file %s returned %s\n",
2735 smb_fname_str_dbg(smb_dname),
2736 nt_errstr(status)));
2737 return status;
2738 }
2739
2740 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2741 !security_token_has_privilege(get_current_nttok(conn),
2742 SEC_PRIV_SECURITY)) {
2743 DEBUG(10, ("open_directory: open on %s "
2744 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2745 smb_fname_str_dbg(smb_dname)));
2746 return NT_STATUS_PRIVILEGE_NOT_HELD;
2747 }
2748
2749 switch( create_disposition ) {
2750 case FILE_OPEN:
2751
2752 if (!dir_existed) {
2753 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2754 }
2755
2756 info = FILE_WAS_OPENED;
2757 break;
2758
2759 case FILE_CREATE:
2760
2761 /* If directory exists error. If directory doesn't
2762 * exist create. */
2763
2764 if (dir_existed) {
2765 status = NT_STATUS_OBJECT_NAME_COLLISION;
2766 DEBUG(2, ("open_directory: unable to create "
2767 "%s. Error was %s\n",
2768 smb_fname_str_dbg(smb_dname),
2769 nt_errstr(status)));
2770 return status;
2771 }
2772
2773 status = mkdir_internal(conn, smb_dname,
2774 file_attributes);
2775
2776 if (!NT_STATUS_IS_OK(status)) {
2777 DEBUG(2, ("open_directory: unable to create "
2778 "%s. Error was %s\n",
2779 smb_fname_str_dbg(smb_dname),
2780 nt_errstr(status)));
2781 return status;
2782 }
2783
2784 info = FILE_WAS_CREATED;
2785 break;
2786
2787 case FILE_OPEN_IF:
2788 /*
2789 * If directory exists open. If directory doesn't
2790 * exist create.
2791 */
2792
2793 if (dir_existed) {
2794 status = NT_STATUS_OK;
2795 info = FILE_WAS_OPENED;
2796 } else {
2797 status = mkdir_internal(conn, smb_dname,
2798 file_attributes);
2799
2800 if (NT_STATUS_IS_OK(status)) {
2801 info = FILE_WAS_CREATED;
2802 } else {
2803 /* Cope with create race. */
2804 if (!NT_STATUS_EQUAL(status,
2805 NT_STATUS_OBJECT_NAME_COLLISION)) {
2806 DEBUG(2, ("open_directory: unable to create "
2807 "%s. Error was %s\n",
2808 smb_fname_str_dbg(smb_dname),
2809 nt_errstr(status)));
2810 return status;
2811 }
2812 info = FILE_WAS_OPENED;
2813 }
2814 }
2815
2816 break;
2817
2818 case FILE_SUPERSEDE:
2819 case FILE_OVERWRITE:
2820 case FILE_OVERWRITE_IF:
2821 default:
2822 DEBUG(5,("open_directory: invalid create_disposition "
2823 "0x%x for directory %s\n",
2824 (unsigned int)create_disposition,
2825 smb_fname_str_dbg(smb_dname)));
2826 return NT_STATUS_INVALID_PARAMETER;
2827 }
2828
2829 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2830 DEBUG(5,("open_directory: %s is not a directory !\n",
2831 smb_fname_str_dbg(smb_dname)));
2832 return NT_STATUS_NOT_A_DIRECTORY;
2833 }
2834
2835 if (info == FILE_WAS_OPENED) {
2836 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2837 if (!NT_STATUS_IS_OK(status)) {
2838 DEBUG(10, ("open_directory: smbd_check_access_rights on "
2839 "file %s failed with %s\n",
2840 smb_fname_str_dbg(smb_dname),
2841 nt_errstr(status)));
2842 return status;
2843 }
2844 }
2845
2846 status = file_new(req, conn, &fsp);
2847 if(!NT_STATUS_IS_OK(status)) {
2848 return status;
2849 }
2850
2851 /*
2852 * Setup the files_struct for it.
2853 */
2854
2855 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2856 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2857 fsp->file_pid = req ? req->smbpid : 0;
2858 fsp->can_lock = False;
2859 fsp->can_read = False;
2860 fsp->can_write = False;
2861
2862 fsp->share_access = share_access;
2863 fsp->fh->private_options = 0;
2864 /*
2865 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2866 */
2867 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2868 fsp->print_file = NULL;
2869 fsp->modified = False;
2870 fsp->oplock_type = NO_OPLOCK;
2871 fsp->sent_oplock_break = NO_BREAK_SENT;
2872 fsp->is_directory = True;
2873 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2874 status = fsp_set_smb_fname(fsp, smb_dname);
2875 if (!NT_STATUS_IS_OK(status)) {
2876 file_free(req, fsp);
2877 return status;
2878 }
2879
2880 mtimespec = smb_dname->st.st_ex_mtime;
2881
2882 #ifdef O_DIRECTORY
2883 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2884 #else
2885 /* POSIX allows us to open a directory with O_RDONLY. */
2886 status = fd_open(conn, fsp, O_RDONLY, 0);
2887 #endif
2888 if (!NT_STATUS_IS_OK(status)) {
2889 DEBUG(5, ("open_directory: Could not open fd for "
2890 "%s (%s)\n",
2891 smb_fname_str_dbg(smb_dname),
2892 nt_errstr(status)));
2893 file_free(req, fsp);
2894 return status;
2895 }
2896
2897 status = vfs_stat_fsp(fsp);
2898 if (!NT_STATUS_IS_OK(status)) {
2899 fd_close(fsp);
2900 file_free(req, fsp);
2901 return status;
2902 }
2903
2904 /* Ensure there was no race condition. */
2905 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2906 DEBUG(5,("open_directory: stat struct differs for "
2907 "directory %s.\n",
2908 smb_fname_str_dbg(smb_dname)));
2909 fd_close(fsp);
2910 file_free(req, fsp);
2911 return NT_STATUS_ACCESS_DENIED;
2912 }
2913
2914 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2915 conn->connectpath, smb_dname,
2916 &mtimespec);
2917
2918 if (lck == NULL) {
2919 DEBUG(0, ("open_directory: Could not get share mode lock for "
2920 "%s\n", smb_fname_str_dbg(smb_dname)));
2921 fd_close(fsp);
2922 file_free(req, fsp);
2923 return NT_STATUS_SHARING_VIOLATION;
2924 }
2925
2926 status = open_mode_check(conn, lck, fsp->name_hash,
2927 access_mask, share_access,
2928 create_options, &dir_existed);
2929
2930 if (!NT_STATUS_IS_OK(status)) {
2931 TALLOC_FREE(lck);
2932 fd_close(fsp);
2933 file_free(req, fsp);
2934 return status;
2935 }
2936
2937 set_share_mode(lck, fsp, get_current_uid(conn),
2938 req ? req->mid : 0, NO_OPLOCK);
2939
2940 /* For directories the delete on close bit at open time seems
2941 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2942 if (create_options & FILE_DELETE_ON_CLOSE) {
2943 status = can_set_delete_on_close(fsp, 0);
2944 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2945 TALLOC_FREE(lck);
2946 fd_close(fsp);
2947 file_free(req, fsp);
2948 return status;
2949 }
2950
2951 if (NT_STATUS_IS_OK(status)) {
2952 /* Note that here we set the *inital* delete on close flag,
2953 not the regular one. The magic gets handled in close. */
2954 fsp->initial_delete_on_close = True;
2955 }
2956 }
2957
2958 TALLOC_FREE(lck);
2959
2960 if (pinfo) {
2961 *pinfo = info;
2962 }
2963
2964 *result = fsp;
2965 return NT_STATUS_OK;
2966 }
2967
2968 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2969 struct smb_filename *smb_dname)
2970 {
2971 NTSTATUS status;
2972 files_struct *fsp;
2973
2974 status = SMB_VFS_CREATE_FILE(
2975 conn, /* conn */
2976 req, /* req */
2977 0, /* root_dir_fid */
2978 smb_dname, /* fname */
2979 FILE_READ_ATTRIBUTES, /* access_mask */
2980 FILE_SHARE_NONE, /* share_access */
2981 FILE_CREATE, /* create_disposition*/
2982 FILE_DIRECTORY_FILE, /* create_options */
2983 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2984 0, /* oplock_request */
2985 0, /* allocation_size */
2986 0, /* private_flags */
2987 NULL, /* sd */
2988 NULL, /* ea_list */
2989 &fsp, /* result */
2990 NULL); /* pinfo */
2991
2992 if (NT_STATUS_IS_OK(status)) {
2993 close_file(req, fsp, NORMAL_CLOSE);
2994 }
2995
2996 return status;
2997 }
2998
2999 /****************************************************************************
3000 Receive notification that one of our open files has been renamed by another
3001 smbd process.
3002 ****************************************************************************/
3003
3004 void msg_file_was_renamed(struct messaging_context *msg,
3005 void *private_data,
3006 uint32_t msg_type,
3007 struct server_id server_id,
3008 DATA_BLOB *data)
3009 {
3010 files_struct *fsp;
3011 char *frm = (char *)data->data;
3012 struct file_id id;
3013 const char *sharepath;
3014 const char *base_name;
3015 const char *stream_name;
3016 struct smb_filename *smb_fname = NULL;
3017 size_t sp_len, bn_len;
3018 NTSTATUS status;
3019 struct smbd_server_connection *sconn =
3020 talloc_get_type_abort(private_data,
3021 struct smbd_server_connection);
3022
3023 if (data->data == NULL
3024 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3025 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3026 (int)data->length));
3027 return;
3028 }
3029
3030 /* Unpack the message. */
3031 pull_file_id_24(frm, &id);
3032 sharepath = &frm[24];
3033 sp_len = strlen(sharepath);
3034 base_name = sharepath + sp_len + 1;
3035 bn_len = strlen(base_name);
3036 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3037
3038 /* stream_name must always be NULL if there is no stream. */
3039 if (stream_name[0] == '\0') {
3040 stream_name = NULL;
3041 }
3042
3043 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3044 stream_name, NULL, &smb_fname);
3045 if (!NT_STATUS_IS_OK(status)) {
3046 return;
3047 }
3048
3049 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3050 "file_id %s\n",
3051 sharepath, smb_fname_str_dbg(smb_fname),
3052 file_id_string_tos(&id)));
3053
3054 for(fsp = file_find_di_first(sconn, id); fsp;
3055 fsp = file_find_di_next(fsp)) {
3056 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3057
3058 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3059 fsp->fnum, fsp_str_dbg(fsp),
3060 smb_fname_str_dbg(smb_fname)));
3061 status = fsp_set_smb_fname(fsp, smb_fname);
3062 if (!NT_STATUS_IS_OK(status)) {
3063 goto out;
3064 }
3065 } else {
3066 /* TODO. JRA. */
3067 /* Now we have the complete path we can work out if this is
3068 actually within this share and adjust newname accordingly. */
3069 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3070 "not sharepath %s) "
3071 "fnum %d from %s -> %s\n",
3072 fsp->conn->connectpath,
3073 sharepath,
3074 fsp->fnum,
3075 fsp_str_dbg(fsp),
3076 smb_fname_str_dbg(smb_fname)));
3077 }
3078 }
3079 out:
3080 TALLOC_FREE(smb_fname);
3081 return;
3082 }
3083
3084 /*
3085 * If a main file is opened for delete, all streams need to be checked for
3086 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3087 * If that works, delete them all by setting the delete on close and close.
3088 */
3089
3090 NTSTATUS open_streams_for_delete(connection_struct *conn,
3091 const char *fname)
3092 {
3093 struct stream_struct *stream_info = NULL;
3094 files_struct **streams = NULL;
3095 int i;
3096 unsigned int num_streams = 0;
3097 TALLOC_CTX *frame = talloc_stackframe();
3098 NTSTATUS status;
3099
3100 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3101 &num_streams, &stream_info);
3102
3103 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3104 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3105 DEBUG(10, ("no streams around\n"));
3106 TALLOC_FREE(frame);
3107 return NT_STATUS_OK;
3108 }
3109
3110 if (!NT_STATUS_IS_OK(status)) {
3111 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3112 nt_errstr(status)));
3113 goto fail;
3114 }
3115
3116 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3117 num_streams));
3118
3119 if (num_streams == 0) {
3120 TALLOC_FREE(frame);
3121 return NT_STATUS_OK;
3122 }
3123
3124 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3125 if (streams == NULL) {
3126 DEBUG(0, ("talloc failed\n"));
3127 status = NT_STATUS_NO_MEMORY;
3128 goto fail;
3129 }
3130
3131 for (i=0; i<num_streams; i++) {
3132 struct smb_filename *smb_fname = NULL;
3133
3134 if (strequal(stream_info[i].name, "::$DATA")) {
3135 streams[i] = NULL;
3136 continue;
3137 }
3138
3139 status = create_synthetic_smb_fname(talloc_tos(), fname,
3140 stream_info[i].name,
3141 NULL, &smb_fname);
3142 if (!NT_STATUS_IS_OK(status)) {
3143 goto fail;
3144 }
3145
3146 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3147 DEBUG(10, ("Unable to stat stream: %s\n",
3148 smb_fname_str_dbg(smb_fname)));
3149 }
3150
3151 status = SMB_VFS_CREATE_FILE(
3152 conn, /* conn */
3153 NULL, /* req */
3154 0, /* root_dir_fid */
3155 smb_fname, /* fname */
3156 DELETE_ACCESS, /* access_mask */
3157 (FILE_SHARE_READ | /* share_access */
3158 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3159 FILE_OPEN, /* create_disposition*/
3160 0, /* create_options */
3161 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3162 0, /* oplock_request */
3163 0, /* allocation_size */
3164 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3165 NULL, /* sd */
3166 NULL, /* ea_list */
3167 &streams[i], /* result */
3168 NULL); /* pinfo */
3169
3170 if (!NT_STATUS_IS_OK(status)) {
3171 DEBUG(10, ("Could not open stream %s: %s\n",
3172 smb_fname_str_dbg(smb_fname),
3173 nt_errstr(status)));
3174
3175 TALLOC_FREE(smb_fname);
3176 break;
3177 }
3178 TALLOC_FREE(smb_fname);
3179 }
3180
3181 /*
3182 * don't touch the variable "status" beyond this point :-)
3183 */
3184
3185 for (i -= 1 ; i >= 0; i--) {
3186 if (streams[i] == NULL) {
3187 continue;
3188 }
3189
3190 DEBUG(10, ("Closing stream # %d, %s\n", i,
3191 fsp_str_dbg(streams[i])));
3192 close_file(NULL, streams[i], NORMAL_CLOSE);
3193 }
3194
3195 fail:
3196 TALLOC_FREE(frame);
3197 return status;
3198 }
3199
3200 /*********************************************************************
3201 Create a default ACL by inheriting from the parent. If no inheritance
3202 from the parent available, don't set anything. This will leave the actual
3203 permissions the new file or directory already got from the filesystem
3204 as the NT ACL when read.
3205 *********************************************************************/
3206
3207 static NTSTATUS inherit_new_acl(files_struct *fsp)
3208 {
3209 TALLOC_CTX *ctx = talloc_tos();
3210 char *parent_name = NULL;
3211 struct security_descriptor *parent_desc = NULL;
3212 NTSTATUS status = NT_STATUS_OK;
3213 struct security_descriptor *psd = NULL;
3214 struct dom_sid *owner_sid = NULL;
3215 struct dom_sid *group_sid = NULL;
3216 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3217 bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3218 bool inheritable_components = false;
3219 size_t size = 0;
3220
3221 if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3222 return NT_STATUS_NO_MEMORY;
3223 }
3224
3225 status = SMB_VFS_GET_NT_ACL(fsp->conn,
3226 parent_name,
3227 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3228 &parent_desc);
3229 if (!NT_STATUS_IS_OK(status)) {
3230 return status;
3231 }
3232
3233 inheritable_components = sd_has_inheritable_components(parent_desc,
3234 fsp->is_directory);
3235
3236 if (!inheritable_components && !inherit_owner) {
3237 /* Nothing to inherit and not setting owner. */
3238 return NT_STATUS_OK;
3239 }
3240
3241 /* Create an inherited descriptor from the parent. */
3242
3243 if (DEBUGLEVEL >= 10) {
3244 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3245 fsp_str_dbg(fsp) ));
3246 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3247 }
3248
3249 /* Inherit from parent descriptor if "inherit owner" set. */
3250 if (inherit_owner) {
3251 owner_sid = parent_desc->owner_sid;
3252 group_sid = parent_desc->group_sid;
3253 }
3254
3255 if (owner_sid == NULL) {
3256 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3257 }
3258 if (group_sid == NULL) {
3259 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3260 }
3261
3262 status = se_create_child_secdesc(ctx,
3263 &psd,
3264 &size,
3265 parent_desc,
3266 owner_sid,
3267 group_sid,
3268 fsp->is_directory);
3269 if (!NT_STATUS_IS_OK(status)) {
3270 return status;
3271 }
3272
3273 /* If inheritable_components == false,
3274 se_create_child_secdesc()
3275 creates a security desriptor with a NULL dacl
3276 entry, but with SEC_DESC_DACL_PRESENT. We need
3277 to remove that flag. */
3278
3279 if (!inheritable_components) {
3280 security_info_sent &= ~SECINFO_DACL;
3281 psd->type &= ~SEC_DESC_DACL_PRESENT;
3282 }
3283
3284 if (DEBUGLEVEL >= 10) {
3285 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3286 fsp_str_dbg(fsp) ));
3287 NDR_PRINT_DEBUG(security_descriptor, psd);
3288 }
3289
3290 if (inherit_owner) {
3291 /* We need to be root to force this. */
3292 become_root();
3293 }
3294 status = SMB_VFS_FSET_NT_ACL(fsp,
3295 security_info_sent,
3296 psd);
3297 if (inherit_owner) {
3298 unbecome_root();
3299 }
3300 return status;
3301 }
3302
3303 /*
3304 * Wrapper around open_file_ntcreate and open_directory
3305 */
3306
3307 static NTSTATUS create_file_unixpath(connection_struct *conn,
3308 struct smb_request *req,
3309 struct smb_filename *smb_fname,
3310 uint32_t access_mask,
3311 uint32_t share_access,
3312 uint32_t create_disposition,
3313 uint32_t create_options,
3314 uint32_t file_attributes,
3315 uint32_t oplock_request,
3316 uint64_t allocation_size,
3317 uint32_t private_flags,
3318 struct security_descriptor *sd,
3319 struct ea_list *ea_list,
3320
3321 files_struct **result,
3322 int *pinfo)
3323 {
3324 int info = FILE_WAS_OPENED;
3325 files_struct *base_fsp = NULL;
3326 files_struct *fsp = NULL;
3327 NTSTATUS status;
3328
3329 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3330 "file_attributes = 0x%x, share_access = 0x%x, "
3331 "create_disposition = 0x%x create_options = 0x%x "
3332 "oplock_request = 0x%x private_flags = 0x%x "
3333 "ea_list = 0x%p, sd = 0x%p, "
3334 "fname = %s\n",
3335 (unsigned int)access_mask,
3336 (unsigned int)file_attributes,
3337 (unsigned int)share_access,
3338 (unsigned int)create_disposition,
3339 (unsigned int)create_options,
3340 (unsigned int)oplock_request,
3341 (unsigned int)private_flags,
3342 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3343
3344 if (create_options & FILE_OPEN_BY_FILE_ID) {
3345 status = NT_STATUS_NOT_SUPPORTED;
3346 goto fail;
3347 }
3348
3349 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3350 status = NT_STATUS_INVALID_PARAMETER;
3351 goto fail;
3352 }
3353
3354 if (req == NULL) {
3355 oplock_request |= INTERNAL_OPEN_ONLY;
3356 }
3357
3358 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3359 && (access_mask & DELETE_ACCESS)
3360 && !is_ntfs_stream_smb_fname(smb_fname)) {
3361 /*
3362 * We can't open a file with DELETE access if any of the
3363 * streams is open without FILE_SHARE_DELETE
3364 */
3365 status = open_streams_for_delete(conn, smb_fname->base_name);
3366
3367 if (!NT_STATUS_IS_OK(status)) {
3368 goto fail;
3369 }
3370 }
3371
3372 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3373 !security_token_has_privilege(get_current_nttok(conn),
3374 SEC_PRIV_SECURITY)) {
3375 DEBUG(10, ("create_file_unixpath: open on %s "
3376 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3377 smb_fname_str_dbg(smb_fname)));
3378 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3379 goto fail;
3380 }
3381
3382 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3383 && is_ntfs_stream_smb_fname(smb_fname)
3384 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3385 uint32 base_create_disposition;
3386 struct smb_filename *smb_fname_base = NULL;
3387
3388 if (create_options & FILE_DIRECTORY_FILE) {
3389 status = NT_STATUS_NOT_A_DIRECTORY;
3390 goto fail;
3391 }
3392
3393 switch (create_disposition) {
3394 case FILE_OPEN:
3395 base_create_disposition = FILE_OPEN;
3396 break;
3397 default:
3398 base_create_disposition = FILE_OPEN_IF;
3399 break;
3400 }
3401
3402 /* Create an smb_filename with stream_name == NULL. */
3403 status = create_synthetic_smb_fname(talloc_tos(),
3404 smb_fname->base_name,
3405 NULL, NULL,
3406 &smb_fname_base);
3407 if (!NT_STATUS_IS_OK(status)) {
3408 goto fail;
3409 }
3410
3411 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3412 DEBUG(10, ("Unable to stat stream: %s\n",
3413 smb_fname_str_dbg(smb_fname_base)));
3414 }
3415
3416 /* Open the base file. */
3417 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3418 FILE_SHARE_READ
3419 | FILE_SHARE_WRITE
3420 | FILE_SHARE_DELETE,
3421 base_create_disposition,
3422 0, 0, 0, 0, 0, NULL, NULL,
3423 &base_fsp, NULL);
3424 TALLOC_FREE(smb_fname_base);
3425
3426 if (!NT_STATUS_IS_OK(status)) {
3427 DEBUG(10, ("create_file_unixpath for base %s failed: "
3428 "%s\n", smb_fname->base_name,
3429 nt_errstr(status)));
3430 goto fail;
3431 }
3432 /* we don't need to low level fd */
3433 fd_close(base_fsp);
3434 }
3435
3436 /*
3437 * If it's a request for a directory open, deal with it separately.
3438 */
3439
3440 if (create_options & FILE_DIRECTORY_FILE) {
3441
3442 if (create_options & FILE_NON_DIRECTORY_FILE) {
3443 status = NT_STATUS_INVALID_PARAMETER;
3444 goto fail;
3445 }
3446
3447 /* Can't open a temp directory. IFS kit test. */
3448 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3449 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3450 status = NT_STATUS_INVALID_PARAMETER;
3451 goto fail;
3452 }
3453
3454 /*
3455 * We will get a create directory here if the Win32
3456 * app specified a security descriptor in the
3457 * CreateDirectory() call.
3458 */
3459
3460 oplock_request = 0;
3461 status = open_directory(
3462 conn, req, smb_fname, access_mask, share_access,
3463 create_disposition, create_options, file_attributes,
3464 &info, &fsp);
3465 } else {
3466
3467 /*
3468 * Ordinary file case.
3469 */
3470
3471 status = file_new(req, conn, &fsp);
3472 if(!NT_STATUS_IS_OK(status)) {
3473 goto fail;
3474 }
3475
3476 status = fsp_set_smb_fname(fsp, smb_fname);
3477 if (!NT_STATUS_IS_OK(status)) {
3478 goto fail;
3479 }
3480
3481 /*
3482 * We're opening the stream element of a base_fsp
3483 * we already opened. Set up the base_fsp pointer.
3484 */
3485 if (base_fsp) {
3486 fsp->base_fsp = base_fsp;
3487 }
3488
3489 status = open_file_ntcreate(conn,
3490 req,
3491 access_mask,
3492 share_access,
3493 create_disposition,
3494 create_options,
3495 file_attributes,
3496 oplock_request,
3497 private_flags,
3498 &info,
3499 fsp);
3500
3501 if(!NT_STATUS_IS_OK(status)) {
3502 file_free(req, fsp);
3503 fsp = NULL;
3504 }
3505
3506 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3507
3508 /* A stream open never opens a directory */
3509
3510 if (base_fsp) {
3511 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3512 goto fail;
3513 }
3514
3515 /*
3516 * Fail the open if it was explicitly a non-directory
3517 * file.
3518 */
3519
3520 if (create_options & FILE_NON_DIRECTORY_FILE) {
3521 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3522 goto fail;
3523 }
3524
3525 oplock_request = 0;
3526 status = open_directory(
3527 conn, req, smb_fname, access_mask,
3528 share_access, create_disposition,
3529 create_options, file_attributes,
3530 &info, &fsp);
3531 }
3532 }
3533
3534 if (!NT_STATUS_IS_OK(status)) {
3535 goto fail;
3536 }
3537
3538 fsp->base_fsp = base_fsp;
3539
3540 if ((ea_list != NULL) &&
3541 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3542 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3543 if (!NT_STATUS_IS_OK(status)) {
3544 goto fail;
3545 }
3546 }
3547
3548 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3549 status = NT_STATUS_ACCESS_DENIED;
3550 goto fail;
3551 }
3552
3553 /* Save the requested allocation size. */
3554 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3555 if (allocation_size
3556 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3557 fsp->initial_allocation_size = smb_roundup(
3558 fsp->conn, allocation_size);
3559 if (fsp->is_directory) {
3560 /* Can't set allocation size on a directory. */
3561 status = NT_STATUS_ACCESS_DENIED;
3562 goto fail;
3563 }
3564 if (vfs_allocate_file_space(
3565 fsp, fsp->initial_allocation_size) == -1) {
3566 status = NT_STATUS_DISK_FULL;
3567 goto fail;
3568 }
3569 } else {
3570 fsp->initial_allocation_size = smb_roundup(
3571 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3572 }
3573 }
3574
3575 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3576 fsp->base_fsp == NULL) {
3577 if (sd != NULL) {
3578 /*
3579 * According to the MS documentation, the only time the security
3580 * descriptor is applied to the opened file is iff we *created* the
3581 * file; an existing file stays the same.
3582 *
3583 * Also, it seems (from observation) that you can open the file with
3584 * any access mask but you can still write the sd. We need to override
3585 * the granted access before we call set_sd
3586 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3587 */
3588
3589 uint32_t sec_info_sent;
3590 uint32_t saved_access_mask = fsp->access_mask;
3591
3592 sec_info_sent = get_sec_info(sd);
3593
3594 fsp->access_mask = FILE_GENERIC_ALL;
3595
3596 /* Convert all the generic bits. */
3597 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3598 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3599
3600 if (sec_info_sent & (SECINFO_OWNER|
3601 SECINFO_GROUP|
3602 SECINFO_DACL|
3603 SECINFO_SACL)) {
3604 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3605 }
3606
3607 fsp->access_mask = saved_access_mask;
3608
3609 if (!NT_STATUS_IS_OK(status)) {
3610 goto fail;
3611 }
3612 } else if (lp_inherit_acls(SNUM(conn))) {
3613 /* Inherit from parent. Errors here are not fatal. */
3614 status = inherit_new_acl(fsp);
3615 if (!NT_STATUS_IS_OK(status)) {
3616 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3617 fsp_str_dbg(fsp),
3618 nt_errstr(status) ));
3619 }
3620 }
3621 }
3622
3623 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3624
3625 *result = fsp;
3626 if (pinfo != NULL) {
3627 *pinfo = info;
3628 }
3629
3630 smb_fname->st = fsp->fsp_name->st;
3631
3632 return NT_STATUS_OK;
3633
3634 fail:
3635 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3636
3637 if (fsp != NULL) {
3638 if (base_fsp && fsp->base_fsp == base_fsp) {
3639 /*
3640 * The close_file below will close
3641 * fsp->base_fsp.
3642 */
3643 base_fsp = NULL;
3644 }
3645 close_file(req, fsp, ERROR_CLOSE);
3646 fsp = NULL;
3647 }
3648 if (base_fsp != NULL) {
3649 close_file(req, base_fsp, ERROR_CLOSE);
3650 base_fsp = NULL;
3651 }
3652 return status;
3653 }
3654
3655 /*
3656 * Calculate the full path name given a relative fid.
3657 */
3658 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3659 struct smb_request *req,
3660 uint16_t root_dir_fid,
3661 const struct smb_filename *smb_fname,
3662 struct smb_filename **smb_fname_out)
3663 {
3664 files_struct *dir_fsp;
3665 char *parent_fname = NULL;
3666 char *new_base_name = NULL;
3667 NTSTATUS status;
3668
3669 if (root_dir_fid == 0 || !smb_fname) {
3670 status = NT_STATUS_INTERNAL_ERROR;
3671 goto out;
3672 }
3673
3674 dir_fsp = file_fsp(req, root_dir_fid);
3675
3676 if (dir_fsp == NULL) {
3677 status = NT_STATUS_INVALID_HANDLE;
3678 goto out;
3679 }
3680
3681 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3682 status = NT_STATUS_INVALID_HANDLE;
3683 goto out;
3684 }
3685
3686 if (!dir_fsp->is_directory) {
3687
3688 /*
3689 * Check to see if this is a mac fork of some kind.
3690 */
3691
3692 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3693 is_ntfs_stream_smb_fname(smb_fname)) {
3694 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3695 goto out;
3696 }
3697
3698 /*
3699 we need to handle the case when we get a
3700 relative open relative to a file and the
3701 pathname is blank - this is a reopen!
3702 (hint from demyn plantenberg)
3703 */
3704
3705 status = NT_STATUS_INVALID_HANDLE;
3706 goto out;
3707 }
3708
3709 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3710 /*
3711 * We're at the toplevel dir, the final file name
3712 * must not contain ./, as this is filtered out
3713 * normally by srvstr_get_path and unix_convert
3714 * explicitly rejects paths containing ./.
3715 */
3716 parent_fname = talloc_strdup(talloc_tos(), "");
3717 if (parent_fname == NULL) {
3718 status = NT_STATUS_NO_MEMORY;
3719 goto out;
3720 }
3721 } else {
3722 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3723
3724 /*
3725 * Copy in the base directory name.
3726 */
3727
3728 parent_fname = talloc_array(talloc_tos(), char,
3729 dir_name_len+2);
3730 if (parent_fname == NULL) {
3731 status = NT_STATUS_NO_MEMORY;
3732 goto out;
3733 }
3734 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3735 dir_name_len+1);
3736
3737 /*
3738 * Ensure it ends in a '/'.
3739 * We used TALLOC_SIZE +2 to add space for the '/'.
3740 */
3741
3742 if(dir_name_len
3743 && (parent_fname[dir_name_len-1] != '\\')
3744 && (parent_fname[dir_name_len-1] != '/')) {
3745 parent_fname[dir_name_len] = '/';
3746 parent_fname[dir_name_len+1] = '\0';
3747 }
3748 }
3749
3750 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3751 smb_fname->base_name);
3752 if (new_base_name == NULL) {
3753 status = NT_STATUS_NO_MEMORY;
3754 goto out;
3755 }
3756
3757 status = filename_convert(req,
3758 conn,
3759 req->flags2 & FLAGS2_DFS_PATHNAMES,
3760 new_base_name,
3761 0,
3762 NULL,
3763 smb_fname_out);
3764 if (!NT_STATUS_IS_OK(status)) {
3765 goto out;
3766 }
3767
3768 out:
3769 TALLOC_FREE(parent_fname);
3770 TALLOC_FREE(new_base_name);
3771 return status;
3772 }
3773
3774 NTSTATUS create_file_default(connection_struct *conn,
3775 struct smb_request *req,
3776 uint16_t root_dir_fid,
3777 struct smb_filename *smb_fname,
3778 uint32_t access_mask,
3779 uint32_t share_access,
3780 uint32_t create_disposition,
3781 uint32_t create_options,
3782 uint32_t file_attributes,
3783 uint32_t oplock_request,
3784 uint64_t allocation_size,
3785 uint32_t private_flags,
3786 struct security_descriptor *sd,
3787 struct ea_list *ea_list,
3788 files_struct **result,
3789 int *pinfo)
3790 {
3791 int info = FILE_WAS_OPENED;
3792 files_struct *fsp = NULL;
3793 NTSTATUS status;
3794 bool stream_name = false;
3795
3796 DEBUG(10,("create_file: access_mask = 0x%x "
3797 "file_attributes = 0x%x, share_access = 0x%x, "
3798 "create_disposition = 0x%x create_options = 0x%x "
3799 "oplock_request = 0x%x "
3800 "private_flags = 0x%x "
3801 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3802 "fname = %s\n",
3803 (unsigned int)access_mask,
3804 (unsigned int)file_attributes,
3805 (unsigned int)share_access,
3806 (unsigned int)create_disposition,
3807 (unsigned int)create_options,
3808 (unsigned int)oplock_request,
3809 (unsigned int)private_flags,
3810 (unsigned int)root_dir_fid,
3811 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3812
3813 /*
3814 * Calculate the filename from the root_dir_if if necessary.
3815 */
3816
3817 if (root_dir_fid != 0) {
3818 struct smb_filename *smb_fname_out = NULL;
3819 status = get_relative_fid_filename(conn, req, root_dir_fid,
3820 smb_fname, &smb_fname_out);
3821 if (!NT_STATUS_IS_OK(status)) {
3822 goto fail;
3823 }
3824 smb_fname = smb_fname_out;
3825 }
3826
3827 /*
3828 * Check to see if this is a mac fork of some kind.
3829 */
3830
3831 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3832 if (stream_name) {
3833 enum FAKE_FILE_TYPE fake_file_type;
3834
3835 fake_file_type = is_fake_file(smb_fname);
3836
3837 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3838
3839 /*
3840 * Here we go! support for changing the disk quotas
3841 * --metze
3842 *
3843 * We need to fake up to open this MAGIC QUOTA file
3844 * and return a valid FID.
3845 *
3846 * w2k close this file directly after openening xp
3847 * also tries a QUERY_FILE_INFO on the file and then
3848 * close it
3849 */
3850 status = open_fake_file(req, conn, req->vuid,
3851 fake_file_type, smb_fname,
3852 access_mask, &fsp);
3853 if (!NT_STATUS_IS_OK(status)) {
3854 goto fail;
3855 }
3856
3857 ZERO_STRUCT(smb_fname->st);
3858 goto done;
3859 }
3860
3861 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3862 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3863 goto fail;
3864 }
3865 }
3866
3867 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
3868 int ret;
3869 smb_fname->stream_name = NULL;
3870 /* We have to handle this error here. */
3871 if (create_options & FILE_DIRECTORY_FILE) {
3872 status = NT_STATUS_NOT_A_DIRECTORY;
3873 goto fail;
3874 }
3875 if (lp_posix_pathnames()) {
3876 ret = SMB_VFS_LSTAT(conn, smb_fname);
3877 } else {
3878 ret = SMB_VFS_STAT(conn, smb_fname);
3879 }
3880
3881 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3882 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3883 goto fail;
3884 }
3885 }
3886
3887 status = create_file_unixpath(
3888 conn, req, smb_fname, access_mask, share_access,
3889 create_disposition, create_options, file_attributes,
3890 oplock_request, allocation_size, private_flags,
3891 sd, ea_list,
3892 &fsp, &info);
3893
3894 if (!NT_STATUS_IS_OK(status)) {
3895 goto fail;
3896 }
3897
3898 done:
3899 DEBUG(10, ("create_file: info=%d\n", info));
3900
3901 *result = fsp;
3902 if (pinfo != NULL) {
3903 *pinfo = info;
3904 }
3905 return NT_STATUS_OK;
3906
3907 fail:
3908 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3909
3910 if (fsp != NULL) {
3911 close_file(req, fsp, ERROR_CLOSE);
3912 fsp = NULL;
3913 }
3914 return status;
3915 }
reg import