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Part 3 of bugfix for #8211 - "inherit owner = yes" doesn't interact correctly with...
[Samba/gebeck_regimport.git] / source3 / smbd / open.c
blob3603a81cff8210ee2f36d10280687e2d749bcfc4
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 "auth.h"
31 #include "messages.h"
32
33 extern const struct generic_mapping file_generic_mapping;
34
35 struct deferred_open_record {
36 bool delayed_for_oplocks;
37 struct file_id id;
38 };
39
40 /****************************************************************************
41 SMB1 file varient of se_access_check. Never test FILE_READ_ATTRIBUTES.
42 ****************************************************************************/
43
44 NTSTATUS smb1_file_se_access_check(struct connection_struct *conn,
45 const struct security_descriptor *sd,
46 const struct security_token *token,
47 uint32_t access_desired,
48 uint32_t *access_granted)
49 {
50 *access_granted = 0;
51
52 if (get_current_uid(conn) == (uid_t)0) {
53 /* I'm sorry sir, I didn't know you were root... */
54 *access_granted = access_desired;
55 if (access_desired & SEC_FLAG_MAXIMUM_ALLOWED) {
56 *access_granted |= FILE_GENERIC_ALL;
57 }
58 return NT_STATUS_OK;
59 }
60
61 return se_access_check(sd,
62 token,
63 (access_desired & ~FILE_READ_ATTRIBUTES),
64 access_granted);
65 }
66
67 /****************************************************************************
68 Check if we have open rights.
69 ****************************************************************************/
70
71 NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
72 const struct smb_filename *smb_fname,
73 uint32_t access_mask,
74 uint32_t *access_granted)
75 {
76 /* Check if we have rights to open. */
77 NTSTATUS status;
78 struct security_descriptor *sd = NULL;
79
80 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
81 (SECINFO_OWNER |
82 SECINFO_GROUP |
83 SECINFO_DACL),&sd);
84
85 if (!NT_STATUS_IS_OK(status)) {
86 DEBUG(10, ("smbd_check_open_rights: Could not get acl "
87 "on %s: %s\n",
88 smb_fname_str_dbg(smb_fname),
89 nt_errstr(status)));
90 return status;
91 }
92
93 status = smb1_file_se_access_check(conn,
94 sd,
95 get_current_nttok(conn),
96 access_mask,
97 access_granted);
98
99 DEBUG(10,("smbd_check_open_rights: file %s requesting "
100 "0x%x returning 0x%x (%s)\n",
101 smb_fname_str_dbg(smb_fname),
102 (unsigned int)access_mask,
103 (unsigned int)*access_granted,
104 nt_errstr(status) ));
105
106 if (!NT_STATUS_IS_OK(status)) {
107 if (DEBUGLEVEL >= 10) {
108 DEBUG(10,("smbd_check_open_rights: acl for %s is:\n",
109 smb_fname_str_dbg(smb_fname) ));
110 NDR_PRINT_DEBUG(security_descriptor, sd);
111 }
112 }
113
114 TALLOC_FREE(sd);
115
116 return status;
117 }
118
119 /****************************************************************************
120 fd support routines - attempt to do a dos_open.
121 ****************************************************************************/
122
123 static NTSTATUS fd_open(struct connection_struct *conn,
124 files_struct *fsp,
125 int flags,
126 mode_t mode)
127 {
128 struct smb_filename *smb_fname = fsp->fsp_name;
129 NTSTATUS status = NT_STATUS_OK;
130
131 #ifdef O_NOFOLLOW
132 /*
133 * Never follow symlinks on a POSIX client. The
134 * client should be doing this.
135 */
136
137 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
138 flags |= O_NOFOLLOW;
139 }
140 #endif
141
142 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
143 if (fsp->fh->fd == -1) {
144 status = map_nt_error_from_unix(errno);
145 if (errno == EMFILE) {
146 static time_t last_warned = 0L;
147
148 if (time((time_t *) NULL) > last_warned) {
149 DEBUG(0,("Too many open files, unable "
150 "to open more! smbd's max "
151 "open files = %d\n",
152 lp_max_open_files()));
153 last_warned = time((time_t *) NULL);
154 }
155 }
156
157 }
158
159 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
160 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
161 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
162
163 return status;
164 }
165
166 /****************************************************************************
167 Close the file associated with a fsp.
168 ****************************************************************************/
169
170 NTSTATUS fd_close(files_struct *fsp)
171 {
172 int ret;
173
174 if (fsp->dptr) {
175 dptr_CloseDir(fsp);
176 }
177 if (fsp->fh->fd == -1) {
178 return NT_STATUS_OK; /* What we used to call a stat open. */
179 }
180 if (fsp->fh->ref_count > 1) {
181 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
182 }
183
184 ret = SMB_VFS_CLOSE(fsp);
185 fsp->fh->fd = -1;
186 if (ret == -1) {
187 return map_nt_error_from_unix(errno);
188 }
189 return NT_STATUS_OK;
190 }
191
192 /****************************************************************************
193 Change the ownership of a file to that of the parent directory.
194 Do this by fd if possible.
195 ****************************************************************************/
196
197 void change_file_owner_to_parent(connection_struct *conn,
198 const char *inherit_from_dir,
199 files_struct *fsp)
200 {
201 struct smb_filename *smb_fname_parent = NULL;
202 NTSTATUS status;
203 int ret;
204
205 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
206 NULL, NULL, &smb_fname_parent);
207 if (!NT_STATUS_IS_OK(status)) {
208 return;
209 }
210
211 ret = SMB_VFS_STAT(conn, smb_fname_parent);
212 if (ret == -1) {
213 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
214 "directory %s. Error was %s\n",
215 smb_fname_str_dbg(smb_fname_parent),
216 strerror(errno)));
217 TALLOC_FREE(smb_fname_parent);
218 return;
219 }
220
221 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
222 /* Already this uid - no need to change. */
223 DEBUG(10,("change_file_owner_to_parent: file %s "
224 "is already owned by uid %d\n",
225 fsp_str_dbg(fsp),
226 (int)fsp->fsp_name->st.st_ex_uid ));
227 TALLOC_FREE(smb_fname_parent);
228 return;
229 }
230
231 become_root();
232 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
233 unbecome_root();
234 if (ret == -1) {
235 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
236 "file %s to parent directory uid %u. Error "
237 "was %s\n", fsp_str_dbg(fsp),
238 (unsigned int)smb_fname_parent->st.st_ex_uid,
239 strerror(errno) ));
240 } else {
241 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
242 "parent directory uid %u.\n", fsp_str_dbg(fsp),
243 (unsigned int)smb_fname_parent->st.st_ex_uid));
244 /* Ensure the uid entry is updated. */
245 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
246 }
247
248 TALLOC_FREE(smb_fname_parent);
249 }
250
251 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
252 const char *inherit_from_dir,
253 const char *fname,
254 SMB_STRUCT_STAT *psbuf)
255 {
256 struct smb_filename *smb_fname_parent = NULL;
257 struct smb_filename *smb_fname_cwd = NULL;
258 char *saved_dir = NULL;
259 TALLOC_CTX *ctx = talloc_tos();
260 NTSTATUS status = NT_STATUS_OK;
261 int ret;
262
263 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
264 &smb_fname_parent);
265 if (!NT_STATUS_IS_OK(status)) {
266 return status;
267 }
268
269 ret = SMB_VFS_STAT(conn, smb_fname_parent);
270 if (ret == -1) {
271 status = map_nt_error_from_unix(errno);
272 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
273 "directory %s. Error was %s\n",
274 smb_fname_str_dbg(smb_fname_parent),
275 strerror(errno)));
276 goto out;
277 }
278
279 /* We've already done an lstat into psbuf, and we know it's a
280 directory. If we can cd into the directory and the dev/ino
281 are the same then we can safely chown without races as
282 we're locking the directory in place by being in it. This
283 should work on any UNIX (thanks tridge :-). JRA.
284 */
285
286 saved_dir = vfs_GetWd(ctx,conn);
287 if (!saved_dir) {
288 status = map_nt_error_from_unix(errno);
289 DEBUG(0,("change_dir_owner_to_parent: failed to get "
290 "current working directory. Error was %s\n",
291 strerror(errno)));
292 goto out;
293 }
294
295 /* Chdir into the new path. */
296 if (vfs_ChDir(conn, fname) == -1) {
297 status = map_nt_error_from_unix(errno);
298 DEBUG(0,("change_dir_owner_to_parent: failed to change "
299 "current working directory to %s. Error "
300 "was %s\n", fname, strerror(errno) ));
301 goto chdir;
302 }
303
304 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
305 &smb_fname_cwd);
306 if (!NT_STATUS_IS_OK(status)) {
307 return status;
308 }
309
310 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
311 if (ret == -1) {
312 status = map_nt_error_from_unix(errno);
313 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
314 "directory '.' (%s) Error was %s\n",
315 fname, strerror(errno)));
316 goto chdir;
317 }
318
319 /* Ensure we're pointing at the same place. */
320 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
321 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino ||
322 smb_fname_cwd->st.st_ex_mode != psbuf->st_ex_mode ) {
323 DEBUG(0,("change_dir_owner_to_parent: "
324 "device/inode/mode on directory %s changed. "
325 "Refusing to chown !\n", fname ));
326 status = NT_STATUS_ACCESS_DENIED;
327 goto chdir;
328 }
329
330 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
331 /* Already this uid - no need to change. */
332 DEBUG(10,("change_dir_owner_to_parent: directory %s "
333 "is already owned by uid %d\n",
334 fname,
335 (int)smb_fname_cwd->st.st_ex_uid ));
336 status = NT_STATUS_OK;
337 goto chdir;
338 }
339
340 become_root();
341 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
342 (gid_t)-1);
343 unbecome_root();
344 if (ret == -1) {
345 status = map_nt_error_from_unix(errno);
346 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
347 "directory %s to parent directory uid %u. "
348 "Error was %s\n", fname,
349 (unsigned int)smb_fname_parent->st.st_ex_uid,
350 strerror(errno) ));
351 } else {
352 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
353 "directory %s to parent directory uid %u.\n",
354 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
355 /* Ensure the uid entry is updated. */
356 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
357 }
358
359 chdir:
360 vfs_ChDir(conn,saved_dir);
361 out:
362 TALLOC_FREE(smb_fname_parent);
363 TALLOC_FREE(smb_fname_cwd);
364 return status;
365 }
366
367 /****************************************************************************
368 Open a file.
369 ****************************************************************************/
370
371 static NTSTATUS open_file(files_struct *fsp,
372 connection_struct *conn,
373 struct smb_request *req,
374 const char *parent_dir,
375 int flags,
376 mode_t unx_mode,
377 uint32 access_mask, /* client requested access mask. */
378 uint32 open_access_mask) /* what we're actually using in the open. */
379 {
380 struct smb_filename *smb_fname = fsp->fsp_name;
381 NTSTATUS status = NT_STATUS_OK;
382 int accmode = (flags & O_ACCMODE);
383 int local_flags = flags;
384 bool file_existed = VALID_STAT(fsp->fsp_name->st);
385 bool file_created = false;
386
387 fsp->fh->fd = -1;
388 errno = EPERM;
389
390 /* Check permissions */
391
392 /*
393 * This code was changed after seeing a client open request
394 * containing the open mode of (DENY_WRITE/read-only) with
395 * the 'create if not exist' bit set. The previous code
396 * would fail to open the file read only on a read-only share
397 * as it was checking the flags parameter directly against O_RDONLY,
398 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
399 * JRA.
400 */
401
402 if (!CAN_WRITE(conn)) {
403 /* It's a read-only share - fail if we wanted to write. */
404 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
405 DEBUG(3,("Permission denied opening %s\n",
406 smb_fname_str_dbg(smb_fname)));
407 return NT_STATUS_ACCESS_DENIED;
408 } else if(flags & O_CREAT) {
409 /* We don't want to write - but we must make sure that
410 O_CREAT doesn't create the file if we have write
411 access into the directory.
412 */
413 flags &= ~(O_CREAT|O_EXCL);
414 local_flags &= ~(O_CREAT|O_EXCL);
415 }
416 }
417
418 /*
419 * This little piece of insanity is inspired by the
420 * fact that an NT client can open a file for O_RDONLY,
421 * but set the create disposition to FILE_EXISTS_TRUNCATE.
422 * If the client *can* write to the file, then it expects to
423 * truncate the file, even though it is opening for readonly.
424 * Quicken uses this stupid trick in backup file creation...
425 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
426 * for helping track this one down. It didn't bite us in 2.0.x
427 * as we always opened files read-write in that release. JRA.
428 */
429
430 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
431 DEBUG(10,("open_file: truncate requested on read-only open "
432 "for file %s\n", smb_fname_str_dbg(smb_fname)));
433 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
434 }
435
436 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
437 (!file_existed && (local_flags & O_CREAT)) ||
438 ((local_flags & O_TRUNC) == O_TRUNC) ) {
439 const char *wild;
440
441 /*
442 * We can't actually truncate here as the file may be locked.
443 * open_file_ntcreate will take care of the truncate later. JRA.
444 */
445
446 local_flags &= ~O_TRUNC;
447
448 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
449 /*
450 * We would block on opening a FIFO with no one else on the
451 * other end. Do what we used to do and add O_NONBLOCK to the
452 * open flags. JRA.
453 */
454
455 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
456 local_flags |= O_NONBLOCK;
457 }
458 #endif
459
460 /* Don't create files with Microsoft wildcard characters. */
461 if (fsp->base_fsp) {
462 /*
463 * wildcard characters are allowed in stream names
464 * only test the basefilename
465 */
466 wild = fsp->base_fsp->fsp_name->base_name;
467 } else {
468 wild = smb_fname->base_name;
469 }
470 if ((local_flags & O_CREAT) && !file_existed &&
471 ms_has_wild(wild)) {
472 return NT_STATUS_OBJECT_NAME_INVALID;
473 }
474
475 /* Actually do the open */
476 status = fd_open(conn, fsp, local_flags, unx_mode);
477 if (!NT_STATUS_IS_OK(status)) {
478 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
479 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
480 nt_errstr(status),local_flags,flags));
481 return status;
482 }
483
484 if ((local_flags & O_CREAT) && !file_existed) {
485 file_created = true;
486 }
487
488 } else {
489 fsp->fh->fd = -1; /* What we used to call a stat open. */
490 if (file_existed) {
491 uint32_t access_granted = 0;
492
493 status = smbd_check_open_rights(conn,
494 smb_fname,
495 access_mask,
496 &access_granted);
497 if (!NT_STATUS_IS_OK(status)) {
498 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
499 /*
500 * On NT_STATUS_ACCESS_DENIED, access_granted
501 * contains the denied bits.
502 */
503
504 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
505 (access_granted & FILE_WRITE_ATTRIBUTES) &&
506 (lp_map_readonly(SNUM(conn)) ||
507 lp_map_archive(SNUM(conn)) ||
508 lp_map_hidden(SNUM(conn)) ||
509 lp_map_system(SNUM(conn)))) {
510 access_granted &= ~FILE_WRITE_ATTRIBUTES;
511
512 DEBUG(10,("open_file: "
513 "overrode "
514 "FILE_WRITE_"
515 "ATTRIBUTES "
516 "on file %s\n",
517 smb_fname_str_dbg(
518 smb_fname)));
519 }
520
521 if ((access_mask & DELETE_ACCESS) &&
522 (access_granted & DELETE_ACCESS) &&
523 can_delete_file_in_directory(conn,
524 smb_fname)) {
525 /* Were we trying to do a stat open
526 * for delete and didn't get DELETE
527 * access (only) ? Check if the
528 * directory allows DELETE_CHILD.
529 * See here:
530 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
531 * for details. */
532
533 access_granted &= ~DELETE_ACCESS;
534
535 DEBUG(10,("open_file: "
536 "overrode "
537 "DELETE_ACCESS on "
538 "file %s\n",
539 smb_fname_str_dbg(
540 smb_fname)));
541 }
542
543 if (access_granted != 0) {
544 DEBUG(10,("open_file: Access "
545 "denied on file "
546 "%s\n",
547 smb_fname_str_dbg(
548 smb_fname)));
549 return status;
550 }
551 } else if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
552 fsp->posix_open &&
553 S_ISLNK(smb_fname->st.st_ex_mode)) {
554 /* This is a POSIX stat open for delete
555 * or rename on a symlink that points
556 * nowhere. Allow. */
557 DEBUG(10,("open_file: allowing POSIX "
558 "open on bad symlink %s\n",
559 smb_fname_str_dbg(
560 smb_fname)));
561 } else {
562 DEBUG(10,("open_file: "
563 "smbd_check_open_rights on file "
564 "%s returned %s\n",
565 smb_fname_str_dbg(smb_fname),
566 nt_errstr(status) ));
567 return status;
568 }
569 }
570 }
571 }
572
573 if (!file_existed) {
574 int ret;
575
576 if (fsp->fh->fd == -1) {
577 ret = SMB_VFS_STAT(conn, smb_fname);
578 } else {
579 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
580 /* If we have an fd, this stat should succeed. */
581 if (ret == -1) {
582 DEBUG(0,("Error doing fstat on open file %s "
583 "(%s)\n",
584 smb_fname_str_dbg(smb_fname),
585 strerror(errno) ));
586 }
587 }
588
589 /* For a non-io open, this stat failing means file not found. JRA */
590 if (ret == -1) {
591 status = map_nt_error_from_unix(errno);
592 fd_close(fsp);
593 return status;
594 }
595
596 if (file_created) {
597 bool need_re_stat = false;
598 /* Do all inheritance work after we've
599 done a successful stat call and filled
600 in the stat struct in fsp->fsp_name. */
601
602 /* Inherit the ACL if required */
603 if (lp_inherit_perms(SNUM(conn))) {
604 inherit_access_posix_acl(conn, parent_dir,
605 smb_fname->base_name,
606 unx_mode);
607 need_re_stat = true;
608 }
609
610 /* Change the owner if required. */
611 if (lp_inherit_owner(SNUM(conn))) {
612 change_file_owner_to_parent(conn, parent_dir,
613 fsp);
614 need_re_stat = true;
615 }
616
617 if (need_re_stat) {
618 if (fsp->fh->fd == -1) {
619 ret = SMB_VFS_STAT(conn, smb_fname);
620 } else {
621 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
622 /* If we have an fd, this stat should succeed. */
623 if (ret == -1) {
624 DEBUG(0,("Error doing fstat on open file %s "
625 "(%s)\n",
626 smb_fname_str_dbg(smb_fname),
627 strerror(errno) ));
628 }
629 }
630 }
631
632 notify_fname(conn, NOTIFY_ACTION_ADDED,
633 FILE_NOTIFY_CHANGE_FILE_NAME,
634 smb_fname->base_name);
635 }
636 }
637
638 /*
639 * POSIX allows read-only opens of directories. We don't
640 * want to do this (we use a different code path for this)
641 * so catch a directory open and return an EISDIR. JRA.
642 */
643
644 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
645 fd_close(fsp);
646 errno = EISDIR;
647 return NT_STATUS_FILE_IS_A_DIRECTORY;
648 }
649
650 fsp->mode = smb_fname->st.st_ex_mode;
651 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
652 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
653 fsp->file_pid = req ? req->smbpid : 0;
654 fsp->can_lock = True;
655 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
656 if (!CAN_WRITE(conn)) {
657 fsp->can_write = False;
658 } else {
659 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
660 True : False;
661 }
662 fsp->print_file = NULL;
663 fsp->modified = False;
664 fsp->sent_oplock_break = NO_BREAK_SENT;
665 fsp->is_directory = False;
666 if (conn->aio_write_behind_list &&
667 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
668 conn->case_sensitive)) {
669 fsp->aio_write_behind = True;
670 }
671
672 fsp->wcp = NULL; /* Write cache pointer. */
673
674 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
675 conn->session_info->unix_name,
676 smb_fname_str_dbg(smb_fname),
677 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
678 conn->num_files_open));
679
680 errno = 0;
681 return NT_STATUS_OK;
682 }
683
684 /*******************************************************************
685 Return True if the filename is one of the special executable types.
686 ********************************************************************/
687
688 bool is_executable(const char *fname)
689 {
690 if ((fname = strrchr_m(fname,'.'))) {
691 if (strequal(fname,".com") ||
692 strequal(fname,".dll") ||
693 strequal(fname,".exe") ||
694 strequal(fname,".sym")) {
695 return True;
696 }
697 }
698 return False;
699 }
700
701 /****************************************************************************
702 Check if we can open a file with a share mode.
703 Returns True if conflict, False if not.
704 ****************************************************************************/
705
706 static bool share_conflict(struct share_mode_entry *entry,
707 uint32 access_mask,
708 uint32 share_access)
709 {
710 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
711 "entry->share_access = 0x%x, "
712 "entry->private_options = 0x%x\n",
713 (unsigned int)entry->access_mask,
714 (unsigned int)entry->share_access,
715 (unsigned int)entry->private_options));
716
717 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
718 (unsigned int)access_mask, (unsigned int)share_access));
719
720 if ((entry->access_mask & (FILE_WRITE_DATA|
721 FILE_APPEND_DATA|
722 FILE_READ_DATA|
723 FILE_EXECUTE|
724 DELETE_ACCESS)) == 0) {
725 DEBUG(10,("share_conflict: No conflict due to "
726 "entry->access_mask = 0x%x\n",
727 (unsigned int)entry->access_mask ));
728 return False;
729 }
730
731 if ((access_mask & (FILE_WRITE_DATA|
732 FILE_APPEND_DATA|
733 FILE_READ_DATA|
734 FILE_EXECUTE|
735 DELETE_ACCESS)) == 0) {
736 DEBUG(10,("share_conflict: No conflict due to "
737 "access_mask = 0x%x\n",
738 (unsigned int)access_mask ));
739 return False;
740 }
741
742 #if 1 /* JRA TEST - Superdebug. */
743 #define CHECK_MASK(num, am, right, sa, share) \
744 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
745 (unsigned int)(num), (unsigned int)(am), \
746 (unsigned int)(right), (unsigned int)(am)&(right) )); \
747 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
748 (unsigned int)(num), (unsigned int)(sa), \
749 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
750 if (((am) & (right)) && !((sa) & (share))) { \
751 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
752 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
753 (unsigned int)(share) )); \
754 return True; \
755 }
756 #else
757 #define CHECK_MASK(num, am, right, sa, share) \
758 if (((am) & (right)) && !((sa) & (share))) { \
759 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
760 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
761 (unsigned int)(share) )); \
762 return True; \
763 }
764 #endif
765
766 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
767 share_access, FILE_SHARE_WRITE);
768 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
769 entry->share_access, FILE_SHARE_WRITE);
770
771 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
772 share_access, FILE_SHARE_READ);
773 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
774 entry->share_access, FILE_SHARE_READ);
775
776 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
777 share_access, FILE_SHARE_DELETE);
778 CHECK_MASK(6, access_mask, DELETE_ACCESS,
779 entry->share_access, FILE_SHARE_DELETE);
780
781 DEBUG(10,("share_conflict: No conflict.\n"));
782 return False;
783 }
784
785 #if defined(DEVELOPER)
786 static void validate_my_share_entries(struct smbd_server_connection *sconn,
787 int num,
788 struct share_mode_entry *share_entry)
789 {
790 files_struct *fsp;
791
792 if (!procid_is_me(&share_entry->pid)) {
793 return;
794 }
795
796 if (is_deferred_open_entry(share_entry) &&
797 !open_was_deferred(share_entry->op_mid)) {
798 char *str = talloc_asprintf(talloc_tos(),
799 "Got a deferred entry without a request: "
800 "PANIC: %s\n",
801 share_mode_str(talloc_tos(), num, share_entry));
802 smb_panic(str);
803 }
804
805 if (!is_valid_share_mode_entry(share_entry)) {
806 return;
807 }
808
809 fsp = file_find_dif(sconn, share_entry->id,
810 share_entry->share_file_id);
811 if (!fsp) {
812 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
813 share_mode_str(talloc_tos(), num, share_entry) ));
814 smb_panic("validate_my_share_entries: Cannot match a "
815 "share entry with an open file\n");
816 }
817
818 if (is_deferred_open_entry(share_entry) ||
819 is_unused_share_mode_entry(share_entry)) {
820 goto panic;
821 }
822
823 if ((share_entry->op_type == NO_OPLOCK) &&
824 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
825 /* Someone has already written to it, but I haven't yet
826 * noticed */
827 return;
828 }
829
830 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
831 goto panic;
832 }
833
834 return;
835
836 panic:
837 {
838 char *str;
839 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
840 share_mode_str(talloc_tos(), num, share_entry) ));
841 str = talloc_asprintf(talloc_tos(),
842 "validate_my_share_entries: "
843 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
844 fsp->fsp_name->base_name,
845 (unsigned int)fsp->oplock_type,
846 (unsigned int)share_entry->op_type );
847 smb_panic(str);
848 }
849 }
850 #endif
851
852 bool is_stat_open(uint32 access_mask)
853 {
854 return (access_mask &&
855 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
856 FILE_WRITE_ATTRIBUTES))==0) &&
857 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
858 FILE_WRITE_ATTRIBUTES)) != 0));
859 }
860
861 /****************************************************************************
862 Deal with share modes
863 Invarient: Share mode must be locked on entry and exit.
864 Returns -1 on error, or number of share modes on success (may be zero).
865 ****************************************************************************/
866
867 static NTSTATUS open_mode_check(connection_struct *conn,
868 struct share_mode_lock *lck,
869 uint32_t name_hash,
870 uint32 access_mask,
871 uint32 share_access,
872 uint32 create_options,
873 bool *file_existed)
874 {
875 int i;
876
877 if(lck->num_share_modes == 0) {
878 return NT_STATUS_OK;
879 }
880
881 *file_existed = True;
882
883 /* A delete on close prohibits everything */
884
885 if (is_delete_on_close_set(lck, name_hash)) {
886 return NT_STATUS_DELETE_PENDING;
887 }
888
889 if (is_stat_open(access_mask)) {
890 /* Stat open that doesn't trigger oplock breaks or share mode
891 * checks... ! JRA. */
892 return NT_STATUS_OK;
893 }
894
895 /*
896 * Check if the share modes will give us access.
897 */
898
899 #if defined(DEVELOPER)
900 for(i = 0; i < lck->num_share_modes; i++) {
901 validate_my_share_entries(conn->sconn, i,
902 &lck->share_modes[i]);
903 }
904 #endif
905
906 if (!lp_share_modes(SNUM(conn))) {
907 return NT_STATUS_OK;
908 }
909
910 /* Now we check the share modes, after any oplock breaks. */
911 for(i = 0; i < lck->num_share_modes; i++) {
912
913 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
914 continue;
915 }
916
917 /* someone else has a share lock on it, check to see if we can
918 * too */
919 if (share_conflict(&lck->share_modes[i],
920 access_mask, share_access)) {
921 return NT_STATUS_SHARING_VIOLATION;
922 }
923 }
924
925 return NT_STATUS_OK;
926 }
927
928 static bool is_delete_request(files_struct *fsp) {
929 return ((fsp->access_mask == DELETE_ACCESS) &&
930 (fsp->oplock_type == NO_OPLOCK));
931 }
932
933 /*
934 * Send a break message to the oplock holder and delay the open for
935 * our client.
936 */
937
938 static NTSTATUS send_break_message(files_struct *fsp,
939 struct share_mode_entry *exclusive,
940 uint64_t mid,
941 int oplock_request)
942 {
943 NTSTATUS status;
944 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
945
946 DEBUG(10, ("Sending break request to PID %s\n",
947 procid_str_static(&exclusive->pid)));
948 exclusive->op_mid = mid;
949
950 /* Create the message. */
951 share_mode_entry_to_message(msg, exclusive);
952
953 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
954 don't want this set in the share mode struct pointed to by lck. */
955
956 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
957 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
958 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
959 }
960
961 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
962 MSG_SMB_BREAK_REQUEST,
963 (uint8 *)msg,
964 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
965 if (!NT_STATUS_IS_OK(status)) {
966 DEBUG(3, ("Could not send oplock break message: %s\n",
967 nt_errstr(status)));
968 }
969
970 return status;
971 }
972
973 /*
974 * Return share_mode_entry pointers for :
975 * 1). Batch oplock entry.
976 * 2). Batch or exclusive oplock entry (may be identical to #1).
977 * bool have_level2_oplock
978 * bool have_no_oplock.
979 * Do internal consistency checks on the share mode for a file.
980 */
981
982 static void find_oplock_types(files_struct *fsp,
983 int oplock_request,
984 struct share_mode_lock *lck,
985 struct share_mode_entry **pp_batch,
986 struct share_mode_entry **pp_ex_or_batch,
987 bool *got_level2,
988 bool *got_no_oplock)
989 {
990 int i;
991
992 *pp_batch = NULL;
993 *pp_ex_or_batch = NULL;
994 *got_level2 = false;
995 *got_no_oplock = false;
996
997 /* Ignore stat or internal opens, as is done in
998 delay_for_batch_oplocks() and
999 delay_for_exclusive_oplocks().
1000 */
1001 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1002 return;
1003 }
1004
1005 for (i=0; i<lck->num_share_modes; i++) {
1006 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1007 continue;
1008 }
1009
1010 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1011 is_stat_open(lck->share_modes[i].access_mask)) {
1012 /* We ignore stat opens in the table - they
1013 always have NO_OPLOCK and never get or
1014 cause breaks. JRA. */
1015 continue;
1016 }
1017
1018 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1019 /* batch - can only be one. */
1020 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1021 smb_panic("Bad batch oplock entry.");
1022 }
1023 *pp_batch = &lck->share_modes[i];
1024 }
1025
1026 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1027 /* Exclusive or batch - can only be one. */
1028 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1029 smb_panic("Bad exclusive or batch oplock entry.");
1030 }
1031 *pp_ex_or_batch = &lck->share_modes[i];
1032 }
1033
1034 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1035 if (*pp_batch || *pp_ex_or_batch) {
1036 smb_panic("Bad levelII oplock entry.");
1037 }
1038 *got_level2 = true;
1039 }
1040
1041 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1042 if (*pp_batch || *pp_ex_or_batch) {
1043 smb_panic("Bad no oplock entry.");
1044 }
1045 *got_no_oplock = true;
1046 }
1047 }
1048 }
1049
1050 static bool delay_for_batch_oplocks(files_struct *fsp,
1051 uint64_t mid,
1052 int oplock_request,
1053 struct share_mode_entry *batch_entry)
1054 {
1055 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1056 return false;
1057 }
1058
1059 if (batch_entry != NULL) {
1060 /* Found a batch oplock */
1061 send_break_message(fsp, batch_entry, mid, oplock_request);
1062 return true;
1063 }
1064 return false;
1065 }
1066
1067 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1068 uint64_t mid,
1069 int oplock_request,
1070 struct share_mode_entry *ex_entry)
1071 {
1072 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1073 return false;
1074 }
1075
1076 if (ex_entry != NULL) {
1077 /* Found an exclusive or batch oplock */
1078 bool delay_it = is_delete_request(fsp) ?
1079 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1080 if (delay_it) {
1081 send_break_message(fsp, ex_entry, mid, oplock_request);
1082 return true;
1083 }
1084 }
1085 return false;
1086 }
1087
1088 static void grant_fsp_oplock_type(files_struct *fsp,
1089 const struct byte_range_lock *br_lck,
1090 int oplock_request,
1091 bool got_level2_oplock,
1092 bool got_a_none_oplock)
1093 {
1094 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1095 lp_level2_oplocks(SNUM(fsp->conn));
1096
1097 /* Start by granting what the client asked for,
1098 but ensure no SAMBA_PRIVATE bits can be set. */
1099 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1100
1101 if (oplock_request & INTERNAL_OPEN_ONLY) {
1102 /* No oplocks on internal open. */
1103 fsp->oplock_type = NO_OPLOCK;
1104 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1105 fsp->oplock_type, fsp_str_dbg(fsp)));
1106 return;
1107 } else if (br_lck && br_lck->num_locks > 0) {
1108 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1109 fsp_str_dbg(fsp)));
1110 fsp->oplock_type = NO_OPLOCK;
1111 }
1112
1113 if (is_stat_open(fsp->access_mask)) {
1114 /* Leave the value already set. */
1115 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1116 fsp->oplock_type, fsp_str_dbg(fsp)));
1117 return;
1118 }
1119
1120 /*
1121 * Match what was requested (fsp->oplock_type) with
1122 * what was found in the existing share modes.
1123 */
1124
1125 if (got_a_none_oplock) {
1126 fsp->oplock_type = NO_OPLOCK;
1127 } else if (got_level2_oplock) {
1128 if (fsp->oplock_type == NO_OPLOCK ||
1129 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1130 /* Store a level2 oplock, but don't tell the client */
1131 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1132 } else {
1133 fsp->oplock_type = LEVEL_II_OPLOCK;
1134 }
1135 } else {
1136 /* All share_mode_entries are placeholders or deferred.
1137 * Silently upgrade to fake levelII if the client didn't
1138 * ask for an oplock. */
1139 if (fsp->oplock_type == NO_OPLOCK) {
1140 /* Store a level2 oplock, but don't tell the client */
1141 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1142 }
1143 }
1144
1145 /*
1146 * Don't grant level2 to clients that don't want them
1147 * or if we've turned them off.
1148 */
1149 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1150 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1151 }
1152
1153 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1154 fsp->oplock_type, fsp_str_dbg(fsp)));
1155 }
1156
1157 bool request_timed_out(struct timeval request_time,
1158 struct timeval timeout)
1159 {
1160 struct timeval now, end_time;
1161 GetTimeOfDay(&now);
1162 end_time = timeval_sum(&request_time, &timeout);
1163 return (timeval_compare(&end_time, &now) < 0);
1164 }
1165
1166 /****************************************************************************
1167 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1168 ****************************************************************************/
1169
1170 static void defer_open(struct share_mode_lock *lck,
1171 struct timeval request_time,
1172 struct timeval timeout,
1173 struct smb_request *req,
1174 struct deferred_open_record *state)
1175 {
1176 int i;
1177
1178 /* Paranoia check */
1179
1180 for (i=0; i<lck->num_share_modes; i++) {
1181 struct share_mode_entry *e = &lck->share_modes[i];
1182
1183 if (!is_deferred_open_entry(e)) {
1184 continue;
1185 }
1186
1187 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1188 DEBUG(0, ("Trying to defer an already deferred "
1189 "request: mid=%llu, exiting\n",
1190 (unsigned long long)req->mid));
1191 exit_server("attempt to defer a deferred request");
1192 }
1193 }
1194
1195 /* End paranoia check */
1196
1197 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1198 "open entry for mid %llu\n",
1199 (unsigned int)request_time.tv_sec,
1200 (unsigned int)request_time.tv_usec,
1201 (unsigned long long)req->mid));
1202
1203 if (!push_deferred_open_message_smb(req, request_time, timeout,
1204 state->id, (char *)state, sizeof(*state))) {
1205 exit_server("push_deferred_open_message_smb failed");
1206 }
1207 add_deferred_open(lck, req->mid, request_time,
1208 sconn_server_id(req->sconn), state->id);
1209 }
1210
1211
1212 /****************************************************************************
1213 On overwrite open ensure that the attributes match.
1214 ****************************************************************************/
1215
1216 bool open_match_attributes(connection_struct *conn,
1217 uint32 old_dos_attr,
1218 uint32 new_dos_attr,
1219 mode_t existing_unx_mode,
1220 mode_t new_unx_mode,
1221 mode_t *returned_unx_mode)
1222 {
1223 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1224
1225 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1226 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1227
1228 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1229 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1230 *returned_unx_mode = new_unx_mode;
1231 } else {
1232 *returned_unx_mode = (mode_t)0;
1233 }
1234
1235 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1236 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1237 "returned_unx_mode = 0%o\n",
1238 (unsigned int)old_dos_attr,
1239 (unsigned int)existing_unx_mode,
1240 (unsigned int)new_dos_attr,
1241 (unsigned int)*returned_unx_mode ));
1242
1243 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1244 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1245 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1246 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1247 return False;
1248 }
1249 }
1250 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1251 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1252 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1253 return False;
1254 }
1255 }
1256 return True;
1257 }
1258
1259 /****************************************************************************
1260 Special FCB or DOS processing in the case of a sharing violation.
1261 Try and find a duplicated file handle.
1262 ****************************************************************************/
1263
1264 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1265 connection_struct *conn,
1266 files_struct *fsp_to_dup_into,
1267 const struct smb_filename *smb_fname,
1268 struct file_id id,
1269 uint16 file_pid,
1270 uint16 vuid,
1271 uint32 access_mask,
1272 uint32 share_access,
1273 uint32 create_options)
1274 {
1275 files_struct *fsp;
1276
1277 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1278 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1279
1280 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1281 fsp = file_find_di_next(fsp)) {
1282
1283 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1284 "vuid = %u, file_pid = %u, private_options = 0x%x "
1285 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1286 fsp->fh->fd, (unsigned int)fsp->vuid,
1287 (unsigned int)fsp->file_pid,
1288 (unsigned int)fsp->fh->private_options,
1289 (unsigned int)fsp->access_mask ));
1290
1291 if (fsp->fh->fd != -1 &&
1292 fsp->vuid == vuid &&
1293 fsp->file_pid == file_pid &&
1294 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1295 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1296 (fsp->access_mask & FILE_WRITE_DATA) &&
1297 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1298 strequal(fsp->fsp_name->stream_name,
1299 smb_fname->stream_name)) {
1300 DEBUG(10,("fcb_or_dos_open: file match\n"));
1301 break;
1302 }
1303 }
1304
1305 if (!fsp) {
1306 return NT_STATUS_NOT_FOUND;
1307 }
1308
1309 /* quite an insane set of semantics ... */
1310 if (is_executable(smb_fname->base_name) &&
1311 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1312 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1313 return NT_STATUS_INVALID_PARAMETER;
1314 }
1315
1316 /* We need to duplicate this fsp. */
1317 return dup_file_fsp(req, fsp, access_mask, share_access,
1318 create_options, fsp_to_dup_into);
1319 }
1320
1321 /****************************************************************************
1322 Open a file with a share mode - old openX method - map into NTCreate.
1323 ****************************************************************************/
1324
1325 bool map_open_params_to_ntcreate(const struct smb_filename *smb_fname,
1326 int deny_mode, int open_func,
1327 uint32 *paccess_mask,
1328 uint32 *pshare_mode,
1329 uint32 *pcreate_disposition,
1330 uint32 *pcreate_options,
1331 uint32_t *pprivate_flags)
1332 {
1333 uint32 access_mask;
1334 uint32 share_mode;
1335 uint32 create_disposition;
1336 uint32 create_options = FILE_NON_DIRECTORY_FILE;
1337 uint32_t private_flags = 0;
1338
1339 DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
1340 "open_func = 0x%x\n",
1341 smb_fname_str_dbg(smb_fname), (unsigned int)deny_mode,
1342 (unsigned int)open_func ));
1343
1344 /* Create the NT compatible access_mask. */
1345 switch (GET_OPENX_MODE(deny_mode)) {
1346 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
1347 case DOS_OPEN_RDONLY:
1348 access_mask = FILE_GENERIC_READ;
1349 break;
1350 case DOS_OPEN_WRONLY:
1351 access_mask = FILE_GENERIC_WRITE;
1352 break;
1353 case DOS_OPEN_RDWR:
1354 case DOS_OPEN_FCB:
1355 access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
1356 break;
1357 default:
1358 DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
1359 (unsigned int)GET_OPENX_MODE(deny_mode)));
1360 return False;
1361 }
1362
1363 /* Create the NT compatible create_disposition. */
1364 switch (open_func) {
1365 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
1366 create_disposition = FILE_CREATE;
1367 break;
1368
1369 case OPENX_FILE_EXISTS_OPEN:
1370 create_disposition = FILE_OPEN;
1371 break;
1372
1373 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
1374 create_disposition = FILE_OPEN_IF;
1375 break;
1376
1377 case OPENX_FILE_EXISTS_TRUNCATE:
1378 create_disposition = FILE_OVERWRITE;
1379 break;
1380
1381 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
1382 create_disposition = FILE_OVERWRITE_IF;
1383 break;
1384
1385 default:
1386 /* From samba4 - to be confirmed. */
1387 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
1388 create_disposition = FILE_CREATE;
1389 break;
1390 }
1391 DEBUG(10,("map_open_params_to_ntcreate: bad "
1392 "open_func 0x%x\n", (unsigned int)open_func));
1393 return False;
1394 }
1395
1396 /* Create the NT compatible share modes. */
1397 switch (GET_DENY_MODE(deny_mode)) {
1398 case DENY_ALL:
1399 share_mode = FILE_SHARE_NONE;
1400 break;
1401
1402 case DENY_WRITE:
1403 share_mode = FILE_SHARE_READ;
1404 break;
1405
1406 case DENY_READ:
1407 share_mode = FILE_SHARE_WRITE;
1408 break;
1409
1410 case DENY_NONE:
1411 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1412 break;
1413
1414 case DENY_DOS:
1415 private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1416 if (is_executable(smb_fname->base_name)) {
1417 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1418 } else {
1419 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1420 share_mode = FILE_SHARE_READ;
1421 } else {
1422 share_mode = FILE_SHARE_NONE;
1423 }
1424 }
1425 break;
1426
1427 case DENY_FCB:
1428 private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1429 share_mode = FILE_SHARE_NONE;
1430 break;
1431
1432 default:
1433 DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1434 (unsigned int)GET_DENY_MODE(deny_mode) ));
1435 return False;
1436 }
1437
1438 DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1439 "share_mode = 0x%x, create_disposition = 0x%x, "
1440 "create_options = 0x%x private_flags = 0x%x\n",
1441 smb_fname_str_dbg(smb_fname),
1442 (unsigned int)access_mask,
1443 (unsigned int)share_mode,
1444 (unsigned int)create_disposition,
1445 (unsigned int)create_options,
1446 (unsigned int)private_flags));
1447
1448 if (paccess_mask) {
1449 *paccess_mask = access_mask;
1450 }
1451 if (pshare_mode) {
1452 *pshare_mode = share_mode;
1453 }
1454 if (pcreate_disposition) {
1455 *pcreate_disposition = create_disposition;
1456 }
1457 if (pcreate_options) {
1458 *pcreate_options = create_options;
1459 }
1460 if (pprivate_flags) {
1461 *pprivate_flags = private_flags;
1462 }
1463
1464 return True;
1465
1466 }
1467
1468 static void schedule_defer_open(struct share_mode_lock *lck,
1469 struct timeval request_time,
1470 struct smb_request *req)
1471 {
1472 struct deferred_open_record state;
1473
1474 /* This is a relative time, added to the absolute
1475 request_time value to get the absolute timeout time.
1476 Note that if this is the second or greater time we enter
1477 this codepath for this particular request mid then
1478 request_time is left as the absolute time of the *first*
1479 time this request mid was processed. This is what allows
1480 the request to eventually time out. */
1481
1482 struct timeval timeout;
1483
1484 /* Normally the smbd we asked should respond within
1485 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1486 * the client did, give twice the timeout as a safety
1487 * measure here in case the other smbd is stuck
1488 * somewhere else. */
1489
1490 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1491
1492 /* Nothing actually uses state.delayed_for_oplocks
1493 but it's handy to differentiate in debug messages
1494 between a 30 second delay due to oplock break, and
1495 a 1 second delay for share mode conflicts. */
1496
1497 state.delayed_for_oplocks = True;
1498 state.id = lck->id;
1499
1500 if (!request_timed_out(request_time, timeout)) {
1501 defer_open(lck, request_time, timeout, req, &state);
1502 }
1503 }
1504
1505 /****************************************************************************
1506 Work out what access_mask to use from what the client sent us.
1507 ****************************************************************************/
1508
1509 static NTSTATUS calculate_access_mask(connection_struct *conn,
1510 const struct smb_filename *smb_fname,
1511 bool file_existed,
1512 uint32_t access_mask,
1513 uint32_t *access_mask_out)
1514 {
1515 NTSTATUS status;
1516
1517 /*
1518 * Convert GENERIC bits to specific bits.
1519 */
1520
1521 se_map_generic(&access_mask, &file_generic_mapping);
1522
1523 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1524 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1525 if (file_existed) {
1526
1527 struct security_descriptor *sd;
1528 uint32_t access_granted = 0;
1529
1530 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1531 (SECINFO_OWNER |
1532 SECINFO_GROUP |
1533 SECINFO_DACL),&sd);
1534
1535 if (!NT_STATUS_IS_OK(status)) {
1536 DEBUG(10, ("calculate_access_mask: Could not get acl "
1537 "on file %s: %s\n",
1538 smb_fname_str_dbg(smb_fname),
1539 nt_errstr(status)));
1540 return NT_STATUS_ACCESS_DENIED;
1541 }
1542
1543 status = smb1_file_se_access_check(conn,
1544 sd,
1545 get_current_nttok(conn),
1546 access_mask,
1547 &access_granted);
1548
1549 TALLOC_FREE(sd);
1550
1551 if (!NT_STATUS_IS_OK(status)) {
1552 DEBUG(10, ("calculate_access_mask: Access denied on "
1553 "file %s: when calculating maximum access\n",
1554 smb_fname_str_dbg(smb_fname)));
1555 return NT_STATUS_ACCESS_DENIED;
1556 }
1557
1558 access_mask = access_granted;
1559 } else {
1560 access_mask = FILE_GENERIC_ALL;
1561 }
1562 }
1563
1564 *access_mask_out = access_mask;
1565 return NT_STATUS_OK;
1566 }
1567
1568 /****************************************************************************
1569 Remove the deferred open entry under lock.
1570 ****************************************************************************/
1571
1572 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1573 struct server_id pid)
1574 {
1575 struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1576 NULL, NULL, NULL);
1577 if (lck == NULL) {
1578 DEBUG(0, ("could not get share mode lock\n"));
1579 } else {
1580 del_deferred_open_entry(lck, mid, pid);
1581 TALLOC_FREE(lck);
1582 }
1583 }
1584
1585 /****************************************************************
1586 Ensure we get the brlock lock followed by the share mode lock
1587 in the correct order to prevent deadlocks if other smbd's are
1588 using the brlock database on this file simultaneously with this open
1589 (that code also gets the locks in brlock -> share mode lock order).
1590 ****************************************************************/
1591
1592 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1593 files_struct *fsp,
1594 const struct file_id id,
1595 const char *connectpath,
1596 const struct smb_filename *smb_fname,
1597 const struct timespec *p_old_write_time,
1598 struct share_mode_lock **p_lck,
1599 struct byte_range_lock **p_br_lck)
1600 {
1601 /* Ordering - we must get the br_lck for this
1602 file before the share mode. */
1603 if (lp_locking(fsp->conn->params)) {
1604 *p_br_lck = brl_get_locks_readonly(fsp);
1605 if (*p_br_lck == NULL) {
1606 DEBUG(0, ("Could not get br_lock\n"));
1607 return false;
1608 }
1609 /* Note - we don't need to free the returned
1610 br_lck explicitly as it was allocated on talloc_tos()
1611 and so will be autofreed (and release the lock)
1612 once the frame context disappears.
1613
1614 If it was set to fsp->brlock_rec then it was
1615 talloc_move'd to hang off the fsp pointer and
1616 in this case is guarenteed to not be holding the
1617 lock on the brlock database. */
1618 }
1619
1620 *p_lck = get_share_mode_lock(mem_ctx,
1621 id,
1622 connectpath,
1623 smb_fname,
1624 p_old_write_time);
1625
1626 if (*p_lck == NULL) {
1627 DEBUG(0, ("Could not get share mode lock\n"));
1628 TALLOC_FREE(*p_br_lck);
1629 return false;
1630 }
1631 return true;
1632 }
1633
1634 /****************************************************************************
1635 Open a file with a share mode. Passed in an already created files_struct *.
1636 ****************************************************************************/
1637
1638 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1639 struct smb_request *req,
1640 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1641 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1642 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1643 uint32 create_options, /* options such as delete on close. */
1644 uint32 new_dos_attributes, /* attributes used for new file. */
1645 int oplock_request, /* internal Samba oplock codes. */
1646 /* Information (FILE_EXISTS etc.) */
1647 uint32_t private_flags, /* Samba specific flags. */
1648 int *pinfo,
1649 files_struct *fsp)
1650 {
1651 struct smb_filename *smb_fname = fsp->fsp_name;
1652 int flags=0;
1653 int flags2=0;
1654 bool file_existed = VALID_STAT(smb_fname->st);
1655 bool def_acl = False;
1656 bool posix_open = False;
1657 bool new_file_created = False;
1658 bool clear_ads = false;
1659 struct file_id id;
1660 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1661 mode_t new_unx_mode = (mode_t)0;
1662 mode_t unx_mode = (mode_t)0;
1663 int info;
1664 uint32 existing_dos_attributes = 0;
1665 struct timeval request_time = timeval_zero();
1666 struct share_mode_lock *lck = NULL;
1667 uint32 open_access_mask = access_mask;
1668 NTSTATUS status;
1669 char *parent_dir;
1670
1671 ZERO_STRUCT(id);
1672
1673 /* Windows allows a new file to be created and
1674 silently removes a FILE_ATTRIBUTE_DIRECTORY
1675 sent by the client. Do the same. */
1676
1677 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1678
1679 if (conn->printer) {
1680 /*
1681 * Printers are handled completely differently.
1682 * Most of the passed parameters are ignored.
1683 */
1684
1685 if (pinfo) {
1686 *pinfo = FILE_WAS_CREATED;
1687 }
1688
1689 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1690 smb_fname_str_dbg(smb_fname)));
1691
1692 if (!req) {
1693 DEBUG(0,("open_file_ntcreate: printer open without "
1694 "an SMB request!\n"));
1695 return NT_STATUS_INTERNAL_ERROR;
1696 }
1697
1698 return print_spool_open(fsp, smb_fname->base_name,
1699 req->vuid);
1700 }
1701
1702 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1703 NULL)) {
1704 return NT_STATUS_NO_MEMORY;
1705 }
1706
1707 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1708 posix_open = True;
1709 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1710 new_dos_attributes = 0;
1711 } else {
1712 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1713 * created new. */
1714 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1715 smb_fname, parent_dir);
1716 }
1717
1718 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1719 "access_mask=0x%x share_access=0x%x "
1720 "create_disposition = 0x%x create_options=0x%x "
1721 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1722 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1723 access_mask, share_access, create_disposition,
1724 create_options, (unsigned int)unx_mode, oplock_request,
1725 (unsigned int)private_flags));
1726
1727 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1728 DEBUG(0, ("No smb request but not an internal only open!\n"));
1729 return NT_STATUS_INTERNAL_ERROR;
1730 }
1731
1732 /*
1733 * Only non-internal opens can be deferred at all
1734 */
1735
1736 if (req) {
1737 void *ptr;
1738 if (get_deferred_open_message_state(req,
1739 &request_time,
1740 &ptr)) {
1741
1742 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1743 /* Remember the absolute time of the original
1744 request with this mid. We'll use it later to
1745 see if this has timed out. */
1746
1747 /* Remove the deferred open entry under lock. */
1748 remove_deferred_open_entry(
1749 state->id, req->mid,
1750 sconn_server_id(req->sconn));
1751
1752 /* Ensure we don't reprocess this message. */
1753 remove_deferred_open_message_smb(req->mid);
1754 }
1755 }
1756
1757 status = check_name(conn, smb_fname->base_name);
1758 if (!NT_STATUS_IS_OK(status)) {
1759 return status;
1760 }
1761
1762 if (!posix_open) {
1763 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1764 if (file_existed) {
1765 existing_dos_attributes = dos_mode(conn, smb_fname);
1766 }
1767 }
1768
1769 /* ignore any oplock requests if oplocks are disabled */
1770 if (!lp_oplocks(SNUM(conn)) ||
1771 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1772 /* Mask off everything except the private Samba bits. */
1773 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1774 }
1775
1776 /* this is for OS/2 long file names - say we don't support them */
1777 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1778 /* OS/2 Workplace shell fix may be main code stream in a later
1779 * release. */
1780 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1781 "supported.\n"));
1782 if (use_nt_status()) {
1783 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1784 }
1785 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1786 }
1787
1788 switch( create_disposition ) {
1789 /*
1790 * Currently we're using FILE_SUPERSEDE as the same as
1791 * FILE_OVERWRITE_IF but they really are
1792 * different. FILE_SUPERSEDE deletes an existing file
1793 * (requiring delete access) then recreates it.
1794 */
1795 case FILE_SUPERSEDE:
1796 /* If file exists replace/overwrite. If file doesn't
1797 * exist create. */
1798 flags2 |= (O_CREAT | O_TRUNC);
1799 clear_ads = true;
1800 break;
1801
1802 case FILE_OVERWRITE_IF:
1803 /* If file exists replace/overwrite. If file doesn't
1804 * exist create. */
1805 flags2 |= (O_CREAT | O_TRUNC);
1806 clear_ads = true;
1807 break;
1808
1809 case FILE_OPEN:
1810 /* If file exists open. If file doesn't exist error. */
1811 if (!file_existed) {
1812 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1813 "requested for file %s and file "
1814 "doesn't exist.\n",
1815 smb_fname_str_dbg(smb_fname)));
1816 errno = ENOENT;
1817 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1818 }
1819 break;
1820
1821 case FILE_OVERWRITE:
1822 /* If file exists overwrite. If file doesn't exist
1823 * error. */
1824 if (!file_existed) {
1825 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1826 "requested for file %s and file "
1827 "doesn't exist.\n",
1828 smb_fname_str_dbg(smb_fname) ));
1829 errno = ENOENT;
1830 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1831 }
1832 flags2 |= O_TRUNC;
1833 clear_ads = true;
1834 break;
1835
1836 case FILE_CREATE:
1837 /* If file exists error. If file doesn't exist
1838 * create. */
1839 if (file_existed) {
1840 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1841 "requested for file %s and file "
1842 "already exists.\n",
1843 smb_fname_str_dbg(smb_fname)));
1844 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1845 errno = EISDIR;
1846 } else {
1847 errno = EEXIST;
1848 }
1849 return map_nt_error_from_unix(errno);
1850 }
1851 flags2 |= (O_CREAT|O_EXCL);
1852 break;
1853
1854 case FILE_OPEN_IF:
1855 /* If file exists open. If file doesn't exist
1856 * create. */
1857 flags2 |= O_CREAT;
1858 break;
1859
1860 default:
1861 return NT_STATUS_INVALID_PARAMETER;
1862 }
1863
1864 /* We only care about matching attributes on file exists and
1865 * overwrite. */
1866
1867 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1868 (create_disposition == FILE_OVERWRITE_IF))) {
1869 if (!open_match_attributes(conn, existing_dos_attributes,
1870 new_dos_attributes,
1871 smb_fname->st.st_ex_mode,
1872 unx_mode, &new_unx_mode)) {
1873 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1874 "for file %s (%x %x) (0%o, 0%o)\n",
1875 smb_fname_str_dbg(smb_fname),
1876 existing_dos_attributes,
1877 new_dos_attributes,
1878 (unsigned int)smb_fname->st.st_ex_mode,
1879 (unsigned int)unx_mode ));
1880 errno = EACCES;
1881 return NT_STATUS_ACCESS_DENIED;
1882 }
1883 }
1884
1885 status = calculate_access_mask(conn, smb_fname, file_existed,
1886 access_mask,
1887 &access_mask);
1888 if (!NT_STATUS_IS_OK(status)) {
1889 DEBUG(10, ("open_file_ntcreate: calculate_access_mask "
1890 "on file %s returned %s\n",
1891 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1892 return status;
1893 }
1894
1895 open_access_mask = access_mask;
1896
1897 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1898 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1899 }
1900
1901 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1902 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1903 access_mask));
1904
1905 /*
1906 * Note that we ignore the append flag as append does not
1907 * mean the same thing under DOS and Unix.
1908 */
1909
1910 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1911 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1912 /* DENY_DOS opens are always underlying read-write on the
1913 file handle, no matter what the requested access mask
1914 says. */
1915 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1916 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1917 flags = O_RDWR;
1918 } else {
1919 flags = O_WRONLY;
1920 }
1921 } else {
1922 flags = O_RDONLY;
1923 }
1924
1925 /*
1926 * Currently we only look at FILE_WRITE_THROUGH for create options.
1927 */
1928
1929 #if defined(O_SYNC)
1930 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1931 flags2 |= O_SYNC;
1932 }
1933 #endif /* O_SYNC */
1934
1935 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1936 flags2 |= O_APPEND;
1937 }
1938
1939 if (!posix_open && !CAN_WRITE(conn)) {
1940 /*
1941 * We should really return a permission denied error if either
1942 * O_CREAT or O_TRUNC are set, but for compatibility with
1943 * older versions of Samba we just AND them out.
1944 */
1945 flags2 &= ~(O_CREAT|O_TRUNC);
1946 }
1947
1948 /*
1949 * Ensure we can't write on a read-only share or file.
1950 */
1951
1952 if (flags != O_RDONLY && file_existed &&
1953 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1954 DEBUG(5,("open_file_ntcreate: write access requested for "
1955 "file %s on read only %s\n",
1956 smb_fname_str_dbg(smb_fname),
1957 !CAN_WRITE(conn) ? "share" : "file" ));
1958 errno = EACCES;
1959 return NT_STATUS_ACCESS_DENIED;
1960 }
1961
1962 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1963 fsp->share_access = share_access;
1964 fsp->fh->private_options = private_flags;
1965 fsp->access_mask = open_access_mask; /* We change this to the
1966 * requested access_mask after
1967 * the open is done. */
1968 fsp->posix_open = posix_open;
1969
1970 /* Ensure no SAMBA_PRIVATE bits can be set. */
1971 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1972
1973 if (timeval_is_zero(&request_time)) {
1974 request_time = fsp->open_time;
1975 }
1976
1977 if (file_existed) {
1978 struct byte_range_lock *br_lck = NULL;
1979 struct share_mode_entry *batch_entry = NULL;
1980 struct share_mode_entry *exclusive_entry = NULL;
1981 bool got_level2_oplock = false;
1982 bool got_a_none_oplock = false;
1983
1984 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1985 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1986
1987 if (!acquire_ordered_locks(talloc_tos(),
1988 fsp,
1989 id,
1990 conn->connectpath,
1991 smb_fname,
1992 &old_write_time,
1993 &lck,
1994 &br_lck)) {
1995 return NT_STATUS_SHARING_VIOLATION;
1996 }
1997
1998 /* Get the types we need to examine. */
1999 find_oplock_types(fsp,
2000 oplock_request,
2001 lck,
2002 &batch_entry,
2003 &exclusive_entry,
2004 &got_level2_oplock,
2005 &got_a_none_oplock);
2006
2007 /* First pass - send break only on batch oplocks. */
2008 if ((req != NULL) &&
2009 delay_for_batch_oplocks(fsp,
2010 req->mid,
2011 oplock_request,
2012 batch_entry)) {
2013 schedule_defer_open(lck, request_time, req);
2014 TALLOC_FREE(lck);
2015 return NT_STATUS_SHARING_VIOLATION;
2016 }
2017
2018 /* Use the client requested access mask here, not the one we
2019 * open with. */
2020 status = open_mode_check(conn, lck, fsp->name_hash,
2021 access_mask, share_access,
2022 create_options, &file_existed);
2023
2024 if (NT_STATUS_IS_OK(status)) {
2025 /* We might be going to allow this open. Check oplock
2026 * status again. */
2027 /* Second pass - send break for both batch or
2028 * exclusive oplocks. */
2029 if ((req != NULL) &&
2030 delay_for_exclusive_oplocks(
2031 fsp,
2032 req->mid,
2033 oplock_request,
2034 exclusive_entry)) {
2035 schedule_defer_open(lck, request_time, req);
2036 TALLOC_FREE(lck);
2037 return NT_STATUS_SHARING_VIOLATION;
2038 }
2039 }
2040
2041 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2042 /* DELETE_PENDING is not deferred for a second */
2043 TALLOC_FREE(lck);
2044 return status;
2045 }
2046
2047 grant_fsp_oplock_type(fsp,
2048 br_lck,
2049 oplock_request,
2050 got_level2_oplock,
2051 got_a_none_oplock);
2052
2053 if (!NT_STATUS_IS_OK(status)) {
2054 uint32 can_access_mask;
2055 bool can_access = True;
2056
2057 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2058
2059 /* Check if this can be done with the deny_dos and fcb
2060 * calls. */
2061 if (private_flags &
2062 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2063 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2064 if (req == NULL) {
2065 DEBUG(0, ("DOS open without an SMB "
2066 "request!\n"));
2067 TALLOC_FREE(lck);
2068 return NT_STATUS_INTERNAL_ERROR;
2069 }
2070
2071 /* Use the client requested access mask here,
2072 * not the one we open with. */
2073 status = fcb_or_dos_open(req,
2074 conn,
2075 fsp,
2076 smb_fname,
2077 id,
2078 req->smbpid,
2079 req->vuid,
2080 access_mask,
2081 share_access,
2082 create_options);
2083
2084 if (NT_STATUS_IS_OK(status)) {
2085 TALLOC_FREE(lck);
2086 if (pinfo) {
2087 *pinfo = FILE_WAS_OPENED;
2088 }
2089 return NT_STATUS_OK;
2090 }
2091 }
2092
2093 /*
2094 * This next line is a subtlety we need for
2095 * MS-Access. If a file open will fail due to share
2096 * permissions and also for security (access) reasons,
2097 * we need to return the access failed error, not the
2098 * share error. We can't open the file due to kernel
2099 * oplock deadlock (it's possible we failed above on
2100 * the open_mode_check()) so use a userspace check.
2101 */
2102
2103 if (flags & O_RDWR) {
2104 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2105 } else if (flags & O_WRONLY) {
2106 can_access_mask = FILE_WRITE_DATA;
2107 } else {
2108 can_access_mask = FILE_READ_DATA;
2109 }
2110
2111 if (((can_access_mask & FILE_WRITE_DATA) &&
2112 !CAN_WRITE(conn)) ||
2113 !can_access_file_data(conn, smb_fname,
2114 can_access_mask)) {
2115 can_access = False;
2116 }
2117
2118 /*
2119 * If we're returning a share violation, ensure we
2120 * cope with the braindead 1 second delay.
2121 */
2122
2123 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2124 lp_defer_sharing_violations()) {
2125 struct timeval timeout;
2126 struct deferred_open_record state;
2127 int timeout_usecs;
2128
2129 /* this is a hack to speed up torture tests
2130 in 'make test' */
2131 timeout_usecs = lp_parm_int(SNUM(conn),
2132 "smbd","sharedelay",
2133 SHARING_VIOLATION_USEC_WAIT);
2134
2135 /* This is a relative time, added to the absolute
2136 request_time value to get the absolute timeout time.
2137 Note that if this is the second or greater time we enter
2138 this codepath for this particular request mid then
2139 request_time is left as the absolute time of the *first*
2140 time this request mid was processed. This is what allows
2141 the request to eventually time out. */
2142
2143 timeout = timeval_set(0, timeout_usecs);
2144
2145 /* Nothing actually uses state.delayed_for_oplocks
2146 but it's handy to differentiate in debug messages
2147 between a 30 second delay due to oplock break, and
2148 a 1 second delay for share mode conflicts. */
2149
2150 state.delayed_for_oplocks = False;
2151 state.id = id;
2152
2153 if ((req != NULL)
2154 && !request_timed_out(request_time,
2155 timeout)) {
2156 defer_open(lck, request_time, timeout,
2157 req, &state);
2158 }
2159 }
2160
2161 TALLOC_FREE(lck);
2162 if (can_access) {
2163 /*
2164 * We have detected a sharing violation here
2165 * so return the correct error code
2166 */
2167 status = NT_STATUS_SHARING_VIOLATION;
2168 } else {
2169 status = NT_STATUS_ACCESS_DENIED;
2170 }
2171 return status;
2172 }
2173
2174 /*
2175 * We exit this block with the share entry *locked*.....
2176 */
2177 }
2178
2179 SMB_ASSERT(!file_existed || (lck != NULL));
2180
2181 /*
2182 * Ensure we pay attention to default ACLs on directories if required.
2183 */
2184
2185 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2186 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2187 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2188 }
2189
2190 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2191 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2192 (unsigned int)flags, (unsigned int)flags2,
2193 (unsigned int)unx_mode, (unsigned int)access_mask,
2194 (unsigned int)open_access_mask));
2195
2196 /*
2197 * open_file strips any O_TRUNC flags itself.
2198 */
2199
2200 fsp_open = open_file(fsp, conn, req, parent_dir,
2201 flags|flags2, unx_mode, access_mask,
2202 open_access_mask);
2203
2204 if (!NT_STATUS_IS_OK(fsp_open)) {
2205 TALLOC_FREE(lck);
2206 return fsp_open;
2207 }
2208
2209 if (!file_existed) {
2210 struct byte_range_lock *br_lck = NULL;
2211 struct share_mode_entry *batch_entry = NULL;
2212 struct share_mode_entry *exclusive_entry = NULL;
2213 bool got_level2_oplock = false;
2214 bool got_a_none_oplock = false;
2215 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2216 /*
2217 * Deal with the race condition where two smbd's detect the
2218 * file doesn't exist and do the create at the same time. One
2219 * of them will win and set a share mode, the other (ie. this
2220 * one) should check if the requested share mode for this
2221 * create is allowed.
2222 */
2223
2224 /*
2225 * Now the file exists and fsp is successfully opened,
2226 * fsp->dev and fsp->inode are valid and should replace the
2227 * dev=0,inode=0 from a non existent file. Spotted by
2228 * Nadav Danieli <nadavd@exanet.com>. JRA.
2229 */
2230
2231 id = fsp->file_id;
2232
2233 if (!acquire_ordered_locks(talloc_tos(),
2234 fsp,
2235 id,
2236 conn->connectpath,
2237 smb_fname,
2238 &old_write_time,
2239 &lck,
2240 &br_lck)) {
2241 return NT_STATUS_SHARING_VIOLATION;
2242 }
2243
2244 /* Get the types we need to examine. */
2245 find_oplock_types(fsp,
2246 oplock_request,
2247 lck,
2248 &batch_entry,
2249 &exclusive_entry,
2250 &got_level2_oplock,
2251 &got_a_none_oplock);
2252
2253 /* First pass - send break only on batch oplocks. */
2254 if ((req != NULL) &&
2255 delay_for_batch_oplocks(fsp,
2256 req->mid,
2257 oplock_request,
2258 batch_entry)) {
2259 schedule_defer_open(lck, request_time, req);
2260 TALLOC_FREE(lck);
2261 fd_close(fsp);
2262 return NT_STATUS_SHARING_VIOLATION;
2263 }
2264
2265 status = open_mode_check(conn, lck, fsp->name_hash,
2266 access_mask, share_access,
2267 create_options, &file_existed);
2268
2269 if (NT_STATUS_IS_OK(status)) {
2270 /* We might be going to allow this open. Check oplock
2271 * status again. */
2272 /* Second pass - send break for both batch or
2273 * exclusive oplocks. */
2274 if ((req != NULL) &&
2275 delay_for_exclusive_oplocks(
2276 fsp,
2277 req->mid,
2278 oplock_request,
2279 exclusive_entry)) {
2280 schedule_defer_open(lck, request_time, req);
2281 TALLOC_FREE(lck);
2282 fd_close(fsp);
2283 return NT_STATUS_SHARING_VIOLATION;
2284 }
2285 }
2286
2287 if (!NT_STATUS_IS_OK(status)) {
2288 struct deferred_open_record state;
2289
2290 state.delayed_for_oplocks = False;
2291 state.id = id;
2292
2293 /* Do it all over again immediately. In the second
2294 * round we will find that the file existed and handle
2295 * the DELETE_PENDING and FCB cases correctly. No need
2296 * to duplicate the code here. Essentially this is a
2297 * "goto top of this function", but don't tell
2298 * anybody... */
2299
2300 if (req != NULL) {
2301 defer_open(lck, request_time, timeval_zero(),
2302 req, &state);
2303 }
2304 TALLOC_FREE(lck);
2305 fd_close(fsp);
2306 return status;
2307 }
2308
2309 grant_fsp_oplock_type(fsp,
2310 br_lck,
2311 oplock_request,
2312 got_level2_oplock,
2313 got_a_none_oplock);
2314
2315 /*
2316 * We exit this block with the share entry *locked*.....
2317 */
2318
2319 }
2320
2321 SMB_ASSERT(lck != NULL);
2322
2323 /* Delete streams if create_disposition requires it */
2324 if (file_existed && clear_ads &&
2325 !is_ntfs_stream_smb_fname(smb_fname)) {
2326 status = delete_all_streams(conn, smb_fname->base_name);
2327 if (!NT_STATUS_IS_OK(status)) {
2328 TALLOC_FREE(lck);
2329 fd_close(fsp);
2330 return status;
2331 }
2332 }
2333
2334 /* note that we ignore failure for the following. It is
2335 basically a hack for NFS, and NFS will never set one of
2336 these only read them. Nobody but Samba can ever set a deny
2337 mode and we have already checked our more authoritative
2338 locking database for permission to set this deny mode. If
2339 the kernel refuses the operations then the kernel is wrong.
2340 note that GPFS supports it as well - jmcd */
2341
2342 if (fsp->fh->fd != -1) {
2343 int ret_flock;
2344 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2345 if(ret_flock == -1 ){
2346
2347 TALLOC_FREE(lck);
2348 fd_close(fsp);
2349
2350 return NT_STATUS_SHARING_VIOLATION;
2351 }
2352 }
2353
2354 /*
2355 * At this point onwards, we can guarentee that the share entry
2356 * is locked, whether we created the file or not, and that the
2357 * deny mode is compatible with all current opens.
2358 */
2359
2360 /*
2361 * If requested, truncate the file.
2362 */
2363
2364 if (file_existed && (flags2&O_TRUNC)) {
2365 /*
2366 * We are modifing the file after open - update the stat
2367 * struct..
2368 */
2369 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2370 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2371 status = map_nt_error_from_unix(errno);
2372 TALLOC_FREE(lck);
2373 fd_close(fsp);
2374 return status;
2375 }
2376 }
2377
2378 /*
2379 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2380 * but we don't have to store this - just ignore it on access check.
2381 */
2382 if (conn->sconn->using_smb2) {
2383 /*
2384 * SMB2 doesn't return it (according to Microsoft tests).
2385 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2386 * File created with access = 0x7 (Read, Write, Delete)
2387 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2388 */
2389 fsp->access_mask = access_mask;
2390 } else {
2391 /* But SMB1 does. */
2392 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2393 }
2394
2395 if (file_existed) {
2396 /* stat opens on existing files don't get oplocks. */
2397 if (is_stat_open(open_access_mask)) {
2398 fsp->oplock_type = NO_OPLOCK;
2399 }
2400
2401 if (!(flags2 & O_TRUNC)) {
2402 info = FILE_WAS_OPENED;
2403 } else {
2404 info = FILE_WAS_OVERWRITTEN;
2405 }
2406 } else {
2407 info = FILE_WAS_CREATED;
2408 }
2409
2410 if (pinfo) {
2411 *pinfo = info;
2412 }
2413
2414 /*
2415 * Setup the oplock info in both the shared memory and
2416 * file structs.
2417 */
2418
2419 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2420 /*
2421 * Could not get the kernel oplock or there are byte-range
2422 * locks on the file.
2423 */
2424 fsp->oplock_type = NO_OPLOCK;
2425 }
2426
2427 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2428 new_file_created = True;
2429 }
2430
2431 set_share_mode(lck, fsp, get_current_uid(conn),
2432 req ? req->mid : 0,
2433 fsp->oplock_type);
2434
2435 /* Handle strange delete on close create semantics. */
2436 if (create_options & FILE_DELETE_ON_CLOSE) {
2437
2438 status = can_set_delete_on_close(fsp, new_dos_attributes);
2439
2440 if (!NT_STATUS_IS_OK(status)) {
2441 /* Remember to delete the mode we just added. */
2442 del_share_mode(lck, fsp);
2443 TALLOC_FREE(lck);
2444 fd_close(fsp);
2445 return status;
2446 }
2447 /* Note that here we set the *inital* delete on close flag,
2448 not the regular one. The magic gets handled in close. */
2449 fsp->initial_delete_on_close = True;
2450 }
2451
2452 if (new_file_created) {
2453 /* Files should be initially set as archive */
2454 if (lp_map_archive(SNUM(conn)) ||
2455 lp_store_dos_attributes(SNUM(conn))) {
2456 if (!posix_open) {
2457 if (file_set_dosmode(conn, smb_fname,
2458 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2459 parent_dir, true) == 0) {
2460 unx_mode = smb_fname->st.st_ex_mode;
2461 }
2462 }
2463 }
2464 }
2465
2466 /* Determine sparse flag. */
2467 if (posix_open) {
2468 /* POSIX opens are sparse by default. */
2469 fsp->is_sparse = true;
2470 } else {
2471 fsp->is_sparse = (file_existed &&
2472 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2473 }
2474
2475 /*
2476 * Take care of inherited ACLs on created files - if default ACL not
2477 * selected.
2478 */
2479
2480 if (!posix_open && !file_existed && !def_acl) {
2481
2482 int saved_errno = errno; /* We might get ENOSYS in the next
2483 * call.. */
2484
2485 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2486 errno == ENOSYS) {
2487 errno = saved_errno; /* Ignore ENOSYS */
2488 }
2489
2490 } else if (new_unx_mode) {
2491
2492 int ret = -1;
2493
2494 /* Attributes need changing. File already existed. */
2495
2496 {
2497 int saved_errno = errno; /* We might get ENOSYS in the
2498 * next call.. */
2499 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2500
2501 if (ret == -1 && errno == ENOSYS) {
2502 errno = saved_errno; /* Ignore ENOSYS */
2503 } else {
2504 DEBUG(5, ("open_file_ntcreate: reset "
2505 "attributes of file %s to 0%o\n",
2506 smb_fname_str_dbg(smb_fname),
2507 (unsigned int)new_unx_mode));
2508 ret = 0; /* Don't do the fchmod below. */
2509 }
2510 }
2511
2512 if ((ret == -1) &&
2513 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2514 DEBUG(5, ("open_file_ntcreate: failed to reset "
2515 "attributes of file %s to 0%o\n",
2516 smb_fname_str_dbg(smb_fname),
2517 (unsigned int)new_unx_mode));
2518 }
2519
2520 /* If this is a successful open, we must remove any deferred open
2521 * records. */
2522 if (req != NULL) {
2523 del_deferred_open_entry(lck, req->mid,
2524 sconn_server_id(req->sconn));
2525 }
2526 TALLOC_FREE(lck);
2527
2528 return NT_STATUS_OK;
2529 }
2530
2531
2532 /****************************************************************************
2533 Open a file for for write to ensure that we can fchmod it.
2534 ****************************************************************************/
2535
2536 NTSTATUS open_file_fchmod(connection_struct *conn,
2537 struct smb_filename *smb_fname,
2538 files_struct **result)
2539 {
2540 if (!VALID_STAT(smb_fname->st)) {
2541 return NT_STATUS_INVALID_PARAMETER;
2542 }
2543
2544 return SMB_VFS_CREATE_FILE(
2545 conn, /* conn */
2546 NULL, /* req */
2547 0, /* root_dir_fid */
2548 smb_fname, /* fname */
2549 FILE_WRITE_DATA, /* access_mask */
2550 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2551 FILE_SHARE_DELETE),
2552 FILE_OPEN, /* create_disposition*/
2553 0, /* create_options */
2554 0, /* file_attributes */
2555 INTERNAL_OPEN_ONLY, /* oplock_request */
2556 0, /* allocation_size */
2557 0, /* private_flags */
2558 NULL, /* sd */
2559 NULL, /* ea_list */
2560 result, /* result */
2561 NULL); /* pinfo */
2562 }
2563
2564 static NTSTATUS mkdir_internal(connection_struct *conn,
2565 struct smb_filename *smb_dname,
2566 uint32 file_attributes)
2567 {
2568 mode_t mode;
2569 char *parent_dir;
2570 NTSTATUS status;
2571 bool posix_open = false;
2572
2573 if(!CAN_WRITE(conn)) {
2574 DEBUG(5,("mkdir_internal: failing create on read-only share "
2575 "%s\n", lp_servicename(SNUM(conn))));
2576 return NT_STATUS_ACCESS_DENIED;
2577 }
2578
2579 status = check_name(conn, smb_dname->base_name);
2580 if (!NT_STATUS_IS_OK(status)) {
2581 return status;
2582 }
2583
2584 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2585 NULL)) {
2586 return NT_STATUS_NO_MEMORY;
2587 }
2588
2589 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2590 posix_open = true;
2591 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2592 } else {
2593 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2594 }
2595
2596 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2597 return map_nt_error_from_unix(errno);
2598 }
2599
2600 /* Ensure we're checking for a symlink here.... */
2601 /* We don't want to get caught by a symlink racer. */
2602
2603 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2604 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2605 smb_fname_str_dbg(smb_dname), strerror(errno)));
2606 return map_nt_error_from_unix(errno);
2607 }
2608
2609 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2610 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2611 smb_fname_str_dbg(smb_dname)));
2612 return NT_STATUS_ACCESS_DENIED;
2613 }
2614
2615 if (lp_store_dos_attributes(SNUM(conn))) {
2616 if (!posix_open) {
2617 file_set_dosmode(conn, smb_dname,
2618 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2619 parent_dir, true);
2620 }
2621 }
2622
2623 if (lp_inherit_perms(SNUM(conn))) {
2624 inherit_access_posix_acl(conn, parent_dir,
2625 smb_dname->base_name, mode);
2626 }
2627
2628 if (!posix_open) {
2629 /*
2630 * Check if high bits should have been set,
2631 * then (if bits are missing): add them.
2632 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2633 * dir.
2634 */
2635 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2636 (mode & ~smb_dname->st.st_ex_mode)) {
2637 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2638 (smb_dname->st.st_ex_mode |
2639 (mode & ~smb_dname->st.st_ex_mode)));
2640 }
2641 }
2642
2643 /* Change the owner if required. */
2644 if (lp_inherit_owner(SNUM(conn))) {
2645 change_dir_owner_to_parent(conn, parent_dir,
2646 smb_dname->base_name,
2647 &smb_dname->st);
2648 }
2649
2650 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2651 smb_dname->base_name);
2652
2653 return NT_STATUS_OK;
2654 }
2655
2656 /****************************************************************************
2657 Ensure we didn't get symlink raced on opening a directory.
2658 ****************************************************************************/
2659
2660 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2661 const SMB_STRUCT_STAT *sbuf2)
2662 {
2663 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2664 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2665 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2666 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2667 return false;
2668 }
2669 return true;
2670 }
2671
2672 /****************************************************************************
2673 Open a directory from an NT SMB call.
2674 ****************************************************************************/
2675
2676 static NTSTATUS open_directory(connection_struct *conn,
2677 struct smb_request *req,
2678 struct smb_filename *smb_dname,
2679 uint32 access_mask,
2680 uint32 share_access,
2681 uint32 create_disposition,
2682 uint32 create_options,
2683 uint32 file_attributes,
2684 int *pinfo,
2685 files_struct **result)
2686 {
2687 files_struct *fsp = NULL;
2688 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2689 struct share_mode_lock *lck = NULL;
2690 NTSTATUS status;
2691 struct timespec mtimespec;
2692 int info = 0;
2693
2694 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2695
2696 /* Ensure we have a directory attribute. */
2697 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2698
2699 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2700 "share_access = 0x%x create_options = 0x%x, "
2701 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2702 smb_fname_str_dbg(smb_dname),
2703 (unsigned int)access_mask,
2704 (unsigned int)share_access,
2705 (unsigned int)create_options,
2706 (unsigned int)create_disposition,
2707 (unsigned int)file_attributes));
2708
2709 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2710 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2711 is_ntfs_stream_smb_fname(smb_dname)) {
2712 DEBUG(2, ("open_directory: %s is a stream name!\n",
2713 smb_fname_str_dbg(smb_dname)));
2714 return NT_STATUS_NOT_A_DIRECTORY;
2715 }
2716
2717 status = calculate_access_mask(conn, smb_dname, dir_existed,
2718 access_mask, &access_mask);
2719 if (!NT_STATUS_IS_OK(status)) {
2720 DEBUG(10, ("open_directory: calculate_access_mask "
2721 "on file %s returned %s\n",
2722 smb_fname_str_dbg(smb_dname),
2723 nt_errstr(status)));
2724 return status;
2725 }
2726
2727 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2728 !security_token_has_privilege(get_current_nttok(conn),
2729 SEC_PRIV_SECURITY)) {
2730 DEBUG(10, ("open_directory: open on %s "
2731 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2732 smb_fname_str_dbg(smb_dname)));
2733 return NT_STATUS_PRIVILEGE_NOT_HELD;
2734 }
2735
2736 switch( create_disposition ) {
2737 case FILE_OPEN:
2738
2739 if (!dir_existed) {
2740 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2741 }
2742
2743 info = FILE_WAS_OPENED;
2744 break;
2745
2746 case FILE_CREATE:
2747
2748 /* If directory exists error. If directory doesn't
2749 * exist create. */
2750
2751 status = mkdir_internal(conn, smb_dname,
2752 file_attributes);
2753
2754 if (!NT_STATUS_IS_OK(status)) {
2755 DEBUG(2, ("open_directory: unable to create "
2756 "%s. Error was %s\n",
2757 smb_fname_str_dbg(smb_dname),
2758 nt_errstr(status)));
2759 return status;
2760 }
2761
2762 info = FILE_WAS_CREATED;
2763 break;
2764
2765 case FILE_OPEN_IF:
2766 /*
2767 * If directory exists open. If directory doesn't
2768 * exist create.
2769 */
2770
2771 status = mkdir_internal(conn, smb_dname,
2772 file_attributes);
2773
2774 if (NT_STATUS_IS_OK(status)) {
2775 info = FILE_WAS_CREATED;
2776 }
2777
2778 if (NT_STATUS_EQUAL(status,
2779 NT_STATUS_OBJECT_NAME_COLLISION)) {
2780 info = FILE_WAS_OPENED;
2781 status = NT_STATUS_OK;
2782 }
2783 break;
2784
2785 case FILE_SUPERSEDE:
2786 case FILE_OVERWRITE:
2787 case FILE_OVERWRITE_IF:
2788 default:
2789 DEBUG(5,("open_directory: invalid create_disposition "
2790 "0x%x for directory %s\n",
2791 (unsigned int)create_disposition,
2792 smb_fname_str_dbg(smb_dname)));
2793 return NT_STATUS_INVALID_PARAMETER;
2794 }
2795
2796 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2797 DEBUG(5,("open_directory: %s is not a directory !\n",
2798 smb_fname_str_dbg(smb_dname)));
2799 return NT_STATUS_NOT_A_DIRECTORY;
2800 }
2801
2802 if (info == FILE_WAS_OPENED) {
2803 uint32_t access_granted = 0;
2804 status = smbd_check_open_rights(conn, smb_dname, access_mask,
2805 &access_granted);
2806
2807 /* Were we trying to do a directory open
2808 * for delete and didn't get DELETE
2809 * access (only) ? Check if the
2810 * directory allows DELETE_CHILD.
2811 * See here:
2812 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
2813 * for details. */
2814
2815 if ((NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
2816 (access_mask & DELETE_ACCESS) &&
2817 (access_granted == DELETE_ACCESS) &&
2818 can_delete_file_in_directory(conn, smb_dname))) {
2819 DEBUG(10,("open_directory: overrode ACCESS_DENIED "
2820 "on directory %s\n",
2821 smb_fname_str_dbg(smb_dname)));
2822 status = NT_STATUS_OK;
2823 }
2824
2825 if (!NT_STATUS_IS_OK(status)) {
2826 DEBUG(10, ("open_directory: smbd_check_open_rights on "
2827 "file %s failed with %s\n",
2828 smb_fname_str_dbg(smb_dname),
2829 nt_errstr(status)));
2830 return status;
2831 }
2832 }
2833
2834 status = file_new(req, conn, &fsp);
2835 if(!NT_STATUS_IS_OK(status)) {
2836 return status;
2837 }
2838
2839 /*
2840 * Setup the files_struct for it.
2841 */
2842
2843 fsp->mode = smb_dname->st.st_ex_mode;
2844 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2845 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2846 fsp->file_pid = req ? req->smbpid : 0;
2847 fsp->can_lock = False;
2848 fsp->can_read = False;
2849 fsp->can_write = False;
2850
2851 fsp->share_access = share_access;
2852 fsp->fh->private_options = 0;
2853 /*
2854 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2855 */
2856 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2857 fsp->print_file = NULL;
2858 fsp->modified = False;
2859 fsp->oplock_type = NO_OPLOCK;
2860 fsp->sent_oplock_break = NO_BREAK_SENT;
2861 fsp->is_directory = True;
2862 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2863 status = fsp_set_smb_fname(fsp, smb_dname);
2864 if (!NT_STATUS_IS_OK(status)) {
2865 file_free(req, fsp);
2866 return status;
2867 }
2868
2869 mtimespec = smb_dname->st.st_ex_mtime;
2870
2871 #ifdef O_DIRECTORY
2872 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2873 #else
2874 /* POSIX allows us to open a directory with O_RDONLY. */
2875 status = fd_open(conn, fsp, O_RDONLY, 0);
2876 #endif
2877 if (!NT_STATUS_IS_OK(status)) {
2878 DEBUG(5, ("open_directory: Could not open fd for "
2879 "%s (%s)\n",
2880 smb_fname_str_dbg(smb_dname),
2881 nt_errstr(status)));
2882 file_free(req, fsp);
2883 return status;
2884 }
2885
2886 status = vfs_stat_fsp(fsp);
2887 if (!NT_STATUS_IS_OK(status)) {
2888 fd_close(fsp);
2889 file_free(req, fsp);
2890 return status;
2891 }
2892
2893 /* Ensure there was no race condition. */
2894 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2895 DEBUG(5,("open_directory: stat struct differs for "
2896 "directory %s.\n",
2897 smb_fname_str_dbg(smb_dname)));
2898 fd_close(fsp);
2899 file_free(req, fsp);
2900 return NT_STATUS_ACCESS_DENIED;
2901 }
2902
2903 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2904 conn->connectpath, smb_dname, &mtimespec);
2905
2906 if (lck == NULL) {
2907 DEBUG(0, ("open_directory: Could not get share mode lock for "
2908 "%s\n", smb_fname_str_dbg(smb_dname)));
2909 fd_close(fsp);
2910 file_free(req, fsp);
2911 return NT_STATUS_SHARING_VIOLATION;
2912 }
2913
2914 status = open_mode_check(conn, lck, fsp->name_hash,
2915 access_mask, share_access,
2916 create_options, &dir_existed);
2917
2918 if (!NT_STATUS_IS_OK(status)) {
2919 TALLOC_FREE(lck);
2920 fd_close(fsp);
2921 file_free(req, fsp);
2922 return status;
2923 }
2924
2925 set_share_mode(lck, fsp, get_current_uid(conn),
2926 req ? req->mid : 0, NO_OPLOCK);
2927
2928 /* For directories the delete on close bit at open time seems
2929 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2930 if (create_options & FILE_DELETE_ON_CLOSE) {
2931 status = can_set_delete_on_close(fsp, 0);
2932 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2933 TALLOC_FREE(lck);
2934 fd_close(fsp);
2935 file_free(req, fsp);
2936 return status;
2937 }
2938
2939 if (NT_STATUS_IS_OK(status)) {
2940 /* Note that here we set the *inital* delete on close flag,
2941 not the regular one. The magic gets handled in close. */
2942 fsp->initial_delete_on_close = True;
2943 }
2944 }
2945
2946 TALLOC_FREE(lck);
2947
2948 if (pinfo) {
2949 *pinfo = info;
2950 }
2951
2952 *result = fsp;
2953 return NT_STATUS_OK;
2954 }
2955
2956 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2957 struct smb_filename *smb_dname)
2958 {
2959 NTSTATUS status;
2960 files_struct *fsp;
2961
2962 status = SMB_VFS_CREATE_FILE(
2963 conn, /* conn */
2964 req, /* req */
2965 0, /* root_dir_fid */
2966 smb_dname, /* fname */
2967 FILE_READ_ATTRIBUTES, /* access_mask */
2968 FILE_SHARE_NONE, /* share_access */
2969 FILE_CREATE, /* create_disposition*/
2970 FILE_DIRECTORY_FILE, /* create_options */
2971 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2972 0, /* oplock_request */
2973 0, /* allocation_size */
2974 0, /* private_flags */
2975 NULL, /* sd */
2976 NULL, /* ea_list */
2977 &fsp, /* result */
2978 NULL); /* pinfo */
2979
2980 if (NT_STATUS_IS_OK(status)) {
2981 close_file(req, fsp, NORMAL_CLOSE);
2982 }
2983
2984 return status;
2985 }
2986
2987 /****************************************************************************
2988 Receive notification that one of our open files has been renamed by another
2989 smbd process.
2990 ****************************************************************************/
2991
2992 void msg_file_was_renamed(struct messaging_context *msg,
2993 void *private_data,
2994 uint32_t msg_type,
2995 struct server_id server_id,
2996 DATA_BLOB *data)
2997 {
2998 struct smbd_server_connection *sconn;
2999 files_struct *fsp;
3000 char *frm = (char *)data->data;
3001 struct file_id id;
3002 const char *sharepath;
3003 const char *base_name;
3004 const char *stream_name;
3005 struct smb_filename *smb_fname = NULL;
3006 size_t sp_len, bn_len;
3007 NTSTATUS status;
3008
3009 sconn = msg_ctx_to_sconn(msg);
3010 if (sconn == NULL) {
3011 DEBUG(1, ("could not find sconn\n"));
3012 return;
3013 }
3014
3015 if (data->data == NULL
3016 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3017 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3018 (int)data->length));
3019 return;
3020 }
3021
3022 /* Unpack the message. */
3023 pull_file_id_24(frm, &id);
3024 sharepath = &frm[24];
3025 sp_len = strlen(sharepath);
3026 base_name = sharepath + sp_len + 1;
3027 bn_len = strlen(base_name);
3028 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3029
3030 /* stream_name must always be NULL if there is no stream. */
3031 if (stream_name[0] == '\0') {
3032 stream_name = NULL;
3033 }
3034
3035 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3036 stream_name, NULL, &smb_fname);
3037 if (!NT_STATUS_IS_OK(status)) {
3038 return;
3039 }
3040
3041 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3042 "file_id %s\n",
3043 sharepath, smb_fname_str_dbg(smb_fname),
3044 file_id_string_tos(&id)));
3045
3046 for(fsp = file_find_di_first(sconn, id); fsp;
3047 fsp = file_find_di_next(fsp)) {
3048 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3049
3050 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3051 fsp->fnum, fsp_str_dbg(fsp),
3052 smb_fname_str_dbg(smb_fname)));
3053 status = fsp_set_smb_fname(fsp, smb_fname);
3054 if (!NT_STATUS_IS_OK(status)) {
3055 goto out;
3056 }
3057 } else {
3058 /* TODO. JRA. */
3059 /* Now we have the complete path we can work out if this is
3060 actually within this share and adjust newname accordingly. */
3061 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3062 "not sharepath %s) "
3063 "fnum %d from %s -> %s\n",
3064 fsp->conn->connectpath,
3065 sharepath,
3066 fsp->fnum,
3067 fsp_str_dbg(fsp),
3068 smb_fname_str_dbg(smb_fname)));
3069 }
3070 }
3071 out:
3072 TALLOC_FREE(smb_fname);
3073 return;
3074 }
3075
3076 /*
3077 * If a main file is opened for delete, all streams need to be checked for
3078 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3079 * If that works, delete them all by setting the delete on close and close.
3080 */
3081
3082 NTSTATUS open_streams_for_delete(connection_struct *conn,
3083 const char *fname)
3084 {
3085 struct stream_struct *stream_info;
3086 files_struct **streams;
3087 int i;
3088 unsigned int num_streams;
3089 TALLOC_CTX *frame = talloc_stackframe();
3090 NTSTATUS status;
3091
3092 status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
3093 &num_streams, &stream_info);
3094
3095 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3096 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3097 DEBUG(10, ("no streams around\n"));
3098 TALLOC_FREE(frame);
3099 return NT_STATUS_OK;
3100 }
3101
3102 if (!NT_STATUS_IS_OK(status)) {
3103 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
3104 nt_errstr(status)));
3105 goto fail;
3106 }
3107
3108 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3109 num_streams));
3110
3111 if (num_streams == 0) {
3112 TALLOC_FREE(frame);
3113 return NT_STATUS_OK;
3114 }
3115
3116 streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
3117 if (streams == NULL) {
3118 DEBUG(0, ("talloc failed\n"));
3119 status = NT_STATUS_NO_MEMORY;
3120 goto fail;
3121 }
3122
3123 for (i=0; i<num_streams; i++) {
3124 struct smb_filename *smb_fname = NULL;
3125
3126 if (strequal(stream_info[i].name, "::$DATA")) {
3127 streams[i] = NULL;
3128 continue;
3129 }
3130
3131 status = create_synthetic_smb_fname(talloc_tos(), fname,
3132 stream_info[i].name,
3133 NULL, &smb_fname);
3134 if (!NT_STATUS_IS_OK(status)) {
3135 goto fail;
3136 }
3137
3138 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3139 DEBUG(10, ("Unable to stat stream: %s\n",
3140 smb_fname_str_dbg(smb_fname)));
3141 }
3142
3143 status = SMB_VFS_CREATE_FILE(
3144 conn, /* conn */
3145 NULL, /* req */
3146 0, /* root_dir_fid */
3147 smb_fname, /* fname */
3148 DELETE_ACCESS, /* access_mask */
3149 (FILE_SHARE_READ | /* share_access */
3150 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3151 FILE_OPEN, /* create_disposition*/
3152 0, /* create_options */
3153 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3154 0, /* oplock_request */
3155 0, /* allocation_size */
3156 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3157 NULL, /* sd */
3158 NULL, /* ea_list */
3159 &streams[i], /* result */
3160 NULL); /* pinfo */
3161
3162 if (!NT_STATUS_IS_OK(status)) {
3163 DEBUG(10, ("Could not open stream %s: %s\n",
3164 smb_fname_str_dbg(smb_fname),
3165 nt_errstr(status)));
3166
3167 TALLOC_FREE(smb_fname);
3168 break;
3169 }
3170 TALLOC_FREE(smb_fname);
3171 }
3172
3173 /*
3174 * don't touch the variable "status" beyond this point :-)
3175 */
3176
3177 for (i -= 1 ; i >= 0; i--) {
3178 if (streams[i] == NULL) {
3179 continue;
3180 }
3181
3182 DEBUG(10, ("Closing stream # %d, %s\n", i,
3183 fsp_str_dbg(streams[i])));
3184 close_file(NULL, streams[i], NORMAL_CLOSE);
3185 }
3186
3187 fail:
3188 TALLOC_FREE(frame);
3189 return status;
3190 }
3191
3192 /*
3193 * Wrapper around open_file_ntcreate and open_directory
3194 */
3195
3196 static NTSTATUS create_file_unixpath(connection_struct *conn,
3197 struct smb_request *req,
3198 struct smb_filename *smb_fname,
3199 uint32_t access_mask,
3200 uint32_t share_access,
3201 uint32_t create_disposition,
3202 uint32_t create_options,
3203 uint32_t file_attributes,
3204 uint32_t oplock_request,
3205 uint64_t allocation_size,
3206 uint32_t private_flags,
3207 struct security_descriptor *sd,
3208 struct ea_list *ea_list,
3209
3210 files_struct **result,
3211 int *pinfo)
3212 {
3213 int info = FILE_WAS_OPENED;
3214 files_struct *base_fsp = NULL;
3215 files_struct *fsp = NULL;
3216 NTSTATUS status;
3217
3218 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3219 "file_attributes = 0x%x, share_access = 0x%x, "
3220 "create_disposition = 0x%x create_options = 0x%x "
3221 "oplock_request = 0x%x private_flags = 0x%x "
3222 "ea_list = 0x%p, sd = 0x%p, "
3223 "fname = %s\n",
3224 (unsigned int)access_mask,
3225 (unsigned int)file_attributes,
3226 (unsigned int)share_access,
3227 (unsigned int)create_disposition,
3228 (unsigned int)create_options,
3229 (unsigned int)oplock_request,
3230 (unsigned int)private_flags,
3231 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3232
3233 if (create_options & FILE_OPEN_BY_FILE_ID) {
3234 status = NT_STATUS_NOT_SUPPORTED;
3235 goto fail;
3236 }
3237
3238 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3239 status = NT_STATUS_INVALID_PARAMETER;
3240 goto fail;
3241 }
3242
3243 if (req == NULL) {
3244 oplock_request |= INTERNAL_OPEN_ONLY;
3245 }
3246
3247 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3248 && (access_mask & DELETE_ACCESS)
3249 && !is_ntfs_stream_smb_fname(smb_fname)) {
3250 /*
3251 * We can't open a file with DELETE access if any of the
3252 * streams is open without FILE_SHARE_DELETE
3253 */
3254 status = open_streams_for_delete(conn, smb_fname->base_name);
3255
3256 if (!NT_STATUS_IS_OK(status)) {
3257 goto fail;
3258 }
3259 }
3260
3261 /* This is the correct thing to do (check every time) but can_delete
3262 * is expensive (it may have to read the parent directory
3263 * permissions). So for now we're not doing it unless we have a strong
3264 * hint the client is really going to delete this file. If the client
3265 * is forcing FILE_CREATE let the filesystem take care of the
3266 * permissions. */
3267
3268 /* Setting FILE_SHARE_DELETE is the hint. */
3269
3270 if (lp_acl_check_permissions(SNUM(conn))
3271 && (create_disposition != FILE_CREATE)
3272 && (access_mask & DELETE_ACCESS)
3273 && (!(can_delete_file_in_directory(conn, smb_fname) ||
3274 can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
3275 status = NT_STATUS_ACCESS_DENIED;
3276 DEBUG(10,("create_file_unixpath: open file %s "
3277 "for delete ACCESS_DENIED\n",
3278 smb_fname_str_dbg(smb_fname)));
3279 goto fail;
3280 }
3281
3282 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3283 !security_token_has_privilege(get_current_nttok(conn),
3284 SEC_PRIV_SECURITY)) {
3285 DEBUG(10, ("create_file_unixpath: open on %s "
3286 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3287 smb_fname_str_dbg(smb_fname)));
3288 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3289 goto fail;
3290 }
3291
3292 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3293 && is_ntfs_stream_smb_fname(smb_fname)
3294 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3295 uint32 base_create_disposition;
3296 struct smb_filename *smb_fname_base = NULL;
3297
3298 if (create_options & FILE_DIRECTORY_FILE) {
3299 status = NT_STATUS_NOT_A_DIRECTORY;
3300 goto fail;
3301 }
3302
3303 switch (create_disposition) {
3304 case FILE_OPEN:
3305 base_create_disposition = FILE_OPEN;
3306 break;
3307 default:
3308 base_create_disposition = FILE_OPEN_IF;
3309 break;
3310 }
3311
3312 /* Create an smb_filename with stream_name == NULL. */
3313 status = create_synthetic_smb_fname(talloc_tos(),
3314 smb_fname->base_name,
3315 NULL, NULL,
3316 &smb_fname_base);
3317 if (!NT_STATUS_IS_OK(status)) {
3318 goto fail;
3319 }
3320
3321 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3322 DEBUG(10, ("Unable to stat stream: %s\n",
3323 smb_fname_str_dbg(smb_fname_base)));
3324 }
3325
3326 /* Open the base file. */
3327 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3328 FILE_SHARE_READ
3329 | FILE_SHARE_WRITE
3330 | FILE_SHARE_DELETE,
3331 base_create_disposition,
3332 0, 0, 0, 0, 0, NULL, NULL,
3333 &base_fsp, NULL);
3334 TALLOC_FREE(smb_fname_base);
3335
3336 if (!NT_STATUS_IS_OK(status)) {
3337 DEBUG(10, ("create_file_unixpath for base %s failed: "
3338 "%s\n", smb_fname->base_name,
3339 nt_errstr(status)));
3340 goto fail;
3341 }
3342 /* we don't need to low level fd */
3343 fd_close(base_fsp);
3344 }
3345
3346 /*
3347 * If it's a request for a directory open, deal with it separately.
3348 */
3349
3350 if (create_options & FILE_DIRECTORY_FILE) {
3351
3352 if (create_options & FILE_NON_DIRECTORY_FILE) {
3353 status = NT_STATUS_INVALID_PARAMETER;
3354 goto fail;
3355 }
3356
3357 /* Can't open a temp directory. IFS kit test. */
3358 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3359 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3360 status = NT_STATUS_INVALID_PARAMETER;
3361 goto fail;
3362 }
3363
3364 /*
3365 * We will get a create directory here if the Win32
3366 * app specified a security descriptor in the
3367 * CreateDirectory() call.
3368 */
3369
3370 oplock_request = 0;
3371 status = open_directory(
3372 conn, req, smb_fname, access_mask, share_access,
3373 create_disposition, create_options, file_attributes,
3374 &info, &fsp);
3375 } else {
3376
3377 /*
3378 * Ordinary file case.
3379 */
3380
3381 status = file_new(req, conn, &fsp);
3382 if(!NT_STATUS_IS_OK(status)) {
3383 goto fail;
3384 }
3385
3386 status = fsp_set_smb_fname(fsp, smb_fname);
3387 if (!NT_STATUS_IS_OK(status)) {
3388 goto fail;
3389 }
3390
3391 /*
3392 * We're opening the stream element of a base_fsp
3393 * we already opened. Set up the base_fsp pointer.
3394 */
3395 if (base_fsp) {
3396 fsp->base_fsp = base_fsp;
3397 }
3398
3399 status = open_file_ntcreate(conn,
3400 req,
3401 access_mask,
3402 share_access,
3403 create_disposition,
3404 create_options,
3405 file_attributes,
3406 oplock_request,
3407 private_flags,
3408 &info,
3409 fsp);
3410
3411 if(!NT_STATUS_IS_OK(status)) {
3412 file_free(req, fsp);
3413 fsp = NULL;
3414 }
3415
3416 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3417
3418 /* A stream open never opens a directory */
3419
3420 if (base_fsp) {
3421 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3422 goto fail;
3423 }
3424
3425 /*
3426 * Fail the open if it was explicitly a non-directory
3427 * file.
3428 */
3429
3430 if (create_options & FILE_NON_DIRECTORY_FILE) {
3431 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3432 goto fail;
3433 }
3434
3435 oplock_request = 0;
3436 status = open_directory(
3437 conn, req, smb_fname, access_mask,
3438 share_access, create_disposition,
3439 create_options, file_attributes,
3440 &info, &fsp);
3441 }
3442 }
3443
3444 if (!NT_STATUS_IS_OK(status)) {
3445 goto fail;
3446 }
3447
3448 fsp->base_fsp = base_fsp;
3449
3450 /*
3451 * According to the MS documentation, the only time the security
3452 * descriptor is applied to the opened file is iff we *created* the
3453 * file; an existing file stays the same.
3454 *
3455 * Also, it seems (from observation) that you can open the file with
3456 * any access mask but you can still write the sd. We need to override
3457 * the granted access before we call set_sd
3458 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3459 */
3460
3461 if ((sd != NULL) && (info == FILE_WAS_CREATED)
3462 && lp_nt_acl_support(SNUM(conn))) {
3463
3464 uint32_t sec_info_sent;
3465 uint32_t saved_access_mask = fsp->access_mask;
3466
3467 sec_info_sent = get_sec_info(sd);
3468
3469 fsp->access_mask = FILE_GENERIC_ALL;
3470
3471 /* Convert all the generic bits. */
3472 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3473 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3474
3475 if (sec_info_sent & (SECINFO_OWNER|
3476 SECINFO_GROUP|
3477 SECINFO_DACL|
3478 SECINFO_SACL)) {
3479 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3480 }
3481
3482 fsp->access_mask = saved_access_mask;
3483
3484 if (!NT_STATUS_IS_OK(status)) {
3485 goto fail;
3486 }
3487 }
3488
3489 if ((ea_list != NULL) &&
3490 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3491 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3492 if (!NT_STATUS_IS_OK(status)) {
3493 goto fail;
3494 }
3495 }
3496
3497 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3498 status = NT_STATUS_ACCESS_DENIED;
3499 goto fail;
3500 }
3501
3502 /* Save the requested allocation size. */
3503 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3504 if (allocation_size
3505 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3506 fsp->initial_allocation_size = smb_roundup(
3507 fsp->conn, allocation_size);
3508 if (fsp->is_directory) {
3509 /* Can't set allocation size on a directory. */
3510 status = NT_STATUS_ACCESS_DENIED;
3511 goto fail;
3512 }
3513 if (vfs_allocate_file_space(
3514 fsp, fsp->initial_allocation_size) == -1) {
3515 status = NT_STATUS_DISK_FULL;
3516 goto fail;
3517 }
3518 } else {
3519 fsp->initial_allocation_size = smb_roundup(
3520 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3521 }
3522 }
3523
3524 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3525
3526 *result = fsp;
3527 if (pinfo != NULL) {
3528 *pinfo = info;
3529 }
3530
3531 smb_fname->st = fsp->fsp_name->st;
3532
3533 return NT_STATUS_OK;
3534
3535 fail:
3536 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3537
3538 if (fsp != NULL) {
3539 if (base_fsp && fsp->base_fsp == base_fsp) {
3540 /*
3541 * The close_file below will close
3542 * fsp->base_fsp.
3543 */
3544 base_fsp = NULL;
3545 }
3546 close_file(req, fsp, ERROR_CLOSE);
3547 fsp = NULL;
3548 }
3549 if (base_fsp != NULL) {
3550 close_file(req, base_fsp, ERROR_CLOSE);
3551 base_fsp = NULL;
3552 }
3553 return status;
3554 }
3555
3556 /*
3557 * Calculate the full path name given a relative fid.
3558 */
3559 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3560 struct smb_request *req,
3561 uint16_t root_dir_fid,
3562 const struct smb_filename *smb_fname,
3563 struct smb_filename **smb_fname_out)
3564 {
3565 files_struct *dir_fsp;
3566 char *parent_fname = NULL;
3567 char *new_base_name = NULL;
3568 NTSTATUS status;
3569
3570 if (root_dir_fid == 0 || !smb_fname) {
3571 status = NT_STATUS_INTERNAL_ERROR;
3572 goto out;
3573 }
3574
3575 dir_fsp = file_fsp(req, root_dir_fid);
3576
3577 if (dir_fsp == NULL) {
3578 status = NT_STATUS_INVALID_HANDLE;
3579 goto out;
3580 }
3581
3582 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3583 status = NT_STATUS_INVALID_HANDLE;
3584 goto out;
3585 }
3586
3587 if (!dir_fsp->is_directory) {
3588
3589 /*
3590 * Check to see if this is a mac fork of some kind.
3591 */
3592
3593 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3594 is_ntfs_stream_smb_fname(smb_fname)) {
3595 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3596 goto out;
3597 }
3598
3599 /*
3600 we need to handle the case when we get a
3601 relative open relative to a file and the
3602 pathname is blank - this is a reopen!
3603 (hint from demyn plantenberg)
3604 */
3605
3606 status = NT_STATUS_INVALID_HANDLE;
3607 goto out;
3608 }
3609
3610 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3611 /*
3612 * We're at the toplevel dir, the final file name
3613 * must not contain ./, as this is filtered out
3614 * normally by srvstr_get_path and unix_convert
3615 * explicitly rejects paths containing ./.
3616 */
3617 parent_fname = talloc_strdup(talloc_tos(), "");
3618 if (parent_fname == NULL) {
3619 status = NT_STATUS_NO_MEMORY;
3620 goto out;
3621 }
3622 } else {
3623 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3624
3625 /*
3626 * Copy in the base directory name.
3627 */
3628
3629 parent_fname = TALLOC_ARRAY(talloc_tos(), char,
3630 dir_name_len+2);
3631 if (parent_fname == NULL) {
3632 status = NT_STATUS_NO_MEMORY;
3633 goto out;
3634 }
3635 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3636 dir_name_len+1);
3637
3638 /*
3639 * Ensure it ends in a '/'.
3640 * We used TALLOC_SIZE +2 to add space for the '/'.
3641 */
3642
3643 if(dir_name_len
3644 && (parent_fname[dir_name_len-1] != '\\')
3645 && (parent_fname[dir_name_len-1] != '/')) {
3646 parent_fname[dir_name_len] = '/';
3647 parent_fname[dir_name_len+1] = '\0';
3648 }
3649 }
3650
3651 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3652 smb_fname->base_name);
3653 if (new_base_name == NULL) {
3654 status = NT_STATUS_NO_MEMORY;
3655 goto out;
3656 }
3657
3658 status = filename_convert(req,
3659 conn,
3660 req->flags2 & FLAGS2_DFS_PATHNAMES,
3661 new_base_name,
3662 0,
3663 NULL,
3664 smb_fname_out);
3665 if (!NT_STATUS_IS_OK(status)) {
3666 goto out;
3667 }
3668
3669 out:
3670 TALLOC_FREE(parent_fname);
3671 TALLOC_FREE(new_base_name);
3672 return status;
3673 }
3674
3675 NTSTATUS create_file_default(connection_struct *conn,
3676 struct smb_request *req,
3677 uint16_t root_dir_fid,
3678 struct smb_filename *smb_fname,
3679 uint32_t access_mask,
3680 uint32_t share_access,
3681 uint32_t create_disposition,
3682 uint32_t create_options,
3683 uint32_t file_attributes,
3684 uint32_t oplock_request,
3685 uint64_t allocation_size,
3686 uint32_t private_flags,
3687 struct security_descriptor *sd,
3688 struct ea_list *ea_list,
3689 files_struct **result,
3690 int *pinfo)
3691 {
3692 int info = FILE_WAS_OPENED;
3693 files_struct *fsp = NULL;
3694 NTSTATUS status;
3695 bool stream_name = false;
3696
3697 DEBUG(10,("create_file: access_mask = 0x%x "
3698 "file_attributes = 0x%x, share_access = 0x%x, "
3699 "create_disposition = 0x%x create_options = 0x%x "
3700 "oplock_request = 0x%x "
3701 "private_flags = 0x%x "
3702 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3703 "fname = %s\n",
3704 (unsigned int)access_mask,
3705 (unsigned int)file_attributes,
3706 (unsigned int)share_access,
3707 (unsigned int)create_disposition,
3708 (unsigned int)create_options,
3709 (unsigned int)oplock_request,
3710 (unsigned int)private_flags,
3711 (unsigned int)root_dir_fid,
3712 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3713
3714 /*
3715 * Calculate the filename from the root_dir_if if necessary.
3716 */
3717
3718 if (root_dir_fid != 0) {
3719 struct smb_filename *smb_fname_out = NULL;
3720 status = get_relative_fid_filename(conn, req, root_dir_fid,
3721 smb_fname, &smb_fname_out);
3722 if (!NT_STATUS_IS_OK(status)) {
3723 goto fail;
3724 }
3725 smb_fname = smb_fname_out;
3726 }
3727
3728 /*
3729 * Check to see if this is a mac fork of some kind.
3730 */
3731
3732 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3733 if (stream_name) {
3734 enum FAKE_FILE_TYPE fake_file_type;
3735
3736 fake_file_type = is_fake_file(smb_fname);
3737
3738 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3739
3740 /*
3741 * Here we go! support for changing the disk quotas
3742 * --metze
3743 *
3744 * We need to fake up to open this MAGIC QUOTA file
3745 * and return a valid FID.
3746 *
3747 * w2k close this file directly after openening xp
3748 * also tries a QUERY_FILE_INFO on the file and then
3749 * close it
3750 */
3751 status = open_fake_file(req, conn, req->vuid,
3752 fake_file_type, smb_fname,
3753 access_mask, &fsp);
3754 if (!NT_STATUS_IS_OK(status)) {
3755 goto fail;
3756 }
3757
3758 ZERO_STRUCT(smb_fname->st);
3759 goto done;
3760 }
3761
3762 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3763 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3764 goto fail;
3765 }
3766 }
3767
3768 /* All file access must go through check_name() */
3769
3770 status = check_name(conn, smb_fname->base_name);
3771 if (!NT_STATUS_IS_OK(status)) {
3772 goto fail;
3773 }
3774
3775 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3776 int ret;
3777 smb_fname->stream_name = NULL;
3778 /* We have to handle this error here. */
3779 if (create_options & FILE_DIRECTORY_FILE) {
3780 status = NT_STATUS_NOT_A_DIRECTORY;
3781 goto fail;
3782 }
3783 if (lp_posix_pathnames()) {
3784 ret = SMB_VFS_LSTAT(conn, smb_fname);
3785 } else {
3786 ret = SMB_VFS_STAT(conn, smb_fname);
3787 }
3788
3789 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3790 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3791 goto fail;
3792 }
3793 }
3794
3795 status = create_file_unixpath(
3796 conn, req, smb_fname, access_mask, share_access,
3797 create_disposition, create_options, file_attributes,
3798 oplock_request, allocation_size, private_flags,
3799 sd, ea_list,
3800 &fsp, &info);
3801
3802 if (!NT_STATUS_IS_OK(status)) {
3803 goto fail;
3804 }
3805
3806 done:
3807 DEBUG(10, ("create_file: info=%d\n", info));
3808
3809 *result = fsp;
3810 if (pinfo != NULL) {
3811 *pinfo = info;
3812 }
3813 return NT_STATUS_OK;
3814
3815 fail:
3816 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3817
3818 if (fsp != NULL) {
3819 close_file(req, fsp, ERROR_CLOSE);
3820 fsp = NULL;
3821 }
3822 return status;
3823 }
reg import