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Fix bug #7733 - Invalid client DOS attributes on create can cause incorrect unix...
[Samba/vl.git] / source3 / smbd / open.c
blob10e01203745303c456d0dcbb2b8c67c05534966d
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 "printing.h"
24 #include "smbd/globals.h"
25 #include "fake_file.h"
26 #include "librpc/gen_ndr/messaging.h"
27 #include "../libcli/security/security.h"
28 #include "../librpc/gen_ndr/ndr_security.h"
29
30 extern const struct generic_mapping file_generic_mapping;
31
32 struct deferred_open_record {
33 bool delayed_for_oplocks;
34 struct file_id id;
35 };
36
37 static NTSTATUS create_file_unixpath(connection_struct *conn,
38 struct smb_request *req,
39 struct smb_filename *smb_fname,
40 uint32_t access_mask,
41 uint32_t share_access,
42 uint32_t create_disposition,
43 uint32_t create_options,
44 uint32_t file_attributes,
45 uint32_t oplock_request,
46 uint64_t allocation_size,
47 uint32_t private_flags,
48 struct security_descriptor *sd,
49 struct ea_list *ea_list,
50
51 files_struct **result,
52 int *pinfo);
53
54 /****************************************************************************
55 SMB1 file varient of se_access_check. Never test FILE_READ_ATTRIBUTES.
56 ****************************************************************************/
57
58 NTSTATUS smb1_file_se_access_check(struct connection_struct *conn,
59 const struct security_descriptor *sd,
60 const struct security_token *token,
61 uint32_t access_desired,
62 uint32_t *access_granted)
63 {
64 *access_granted = 0;
65
66 if (get_current_uid(conn) == (uid_t)0) {
67 /* I'm sorry sir, I didn't know you were root... */
68 *access_granted = access_desired;
69 if (access_desired & SEC_FLAG_MAXIMUM_ALLOWED) {
70 *access_granted |= FILE_GENERIC_ALL;
71 }
72 return NT_STATUS_OK;
73 }
74
75 return se_access_check(sd,
76 token,
77 (access_desired & ~FILE_READ_ATTRIBUTES),
78 access_granted);
79 }
80
81 /****************************************************************************
82 Check if we have open rights.
83 ****************************************************************************/
84
85 NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
86 const struct smb_filename *smb_fname,
87 uint32_t access_mask,
88 uint32_t *access_granted)
89 {
90 /* Check if we have rights to open. */
91 NTSTATUS status;
92 struct security_descriptor *sd = NULL;
93
94 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
95 (SECINFO_OWNER |
96 SECINFO_GROUP |
97 SECINFO_DACL),&sd);
98
99 if (!NT_STATUS_IS_OK(status)) {
100 DEBUG(10, ("smbd_check_open_rights: Could not get acl "
101 "on %s: %s\n",
102 smb_fname_str_dbg(smb_fname),
103 nt_errstr(status)));
104 return status;
105 }
106
107 status = smb1_file_se_access_check(conn,
108 sd,
109 get_current_nttok(conn),
110 access_mask,
111 access_granted);
112
113 DEBUG(10,("smbd_check_open_rights: file %s requesting "
114 "0x%x returning 0x%x (%s)\n",
115 smb_fname_str_dbg(smb_fname),
116 (unsigned int)access_mask,
117 (unsigned int)*access_granted,
118 nt_errstr(status) ));
119
120 if (!NT_STATUS_IS_OK(status)) {
121 if (DEBUGLEVEL >= 10) {
122 DEBUG(10,("smbd_check_open_rights: acl for %s is:\n",
123 smb_fname_str_dbg(smb_fname) ));
124 NDR_PRINT_DEBUG(security_descriptor, sd);
125 }
126 }
127
128 TALLOC_FREE(sd);
129
130 return status;
131 }
132
133 /****************************************************************************
134 fd support routines - attempt to do a dos_open.
135 ****************************************************************************/
136
137 static NTSTATUS fd_open(struct connection_struct *conn,
138 files_struct *fsp,
139 int flags,
140 mode_t mode)
141 {
142 struct smb_filename *smb_fname = fsp->fsp_name;
143 NTSTATUS status = NT_STATUS_OK;
144
145 #ifdef O_NOFOLLOW
146 /*
147 * Never follow symlinks on a POSIX client. The
148 * client should be doing this.
149 */
150
151 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
152 flags |= O_NOFOLLOW;
153 }
154 #endif
155
156 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
157 if (fsp->fh->fd == -1) {
158 status = map_nt_error_from_unix(errno);
159 if (errno == EMFILE) {
160 static time_t last_warned = 0L;
161
162 if (time((time_t *) NULL) > last_warned) {
163 DEBUG(0,("Too many open files, unable "
164 "to open more! smbd's max "
165 "open files = %d\n",
166 lp_max_open_files()));
167 last_warned = time((time_t *) NULL);
168 }
169 }
170
171 }
172
173 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
174 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
175 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
176
177 return status;
178 }
179
180 /****************************************************************************
181 Close the file associated with a fsp.
182 ****************************************************************************/
183
184 NTSTATUS fd_close(files_struct *fsp)
185 {
186 int ret;
187
188 if (fsp->fh->fd == -1) {
189 return NT_STATUS_OK; /* What we used to call a stat open. */
190 }
191 if (fsp->fh->ref_count > 1) {
192 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
193 }
194
195 ret = SMB_VFS_CLOSE(fsp);
196 fsp->fh->fd = -1;
197 if (ret == -1) {
198 return map_nt_error_from_unix(errno);
199 }
200 return NT_STATUS_OK;
201 }
202
203 /****************************************************************************
204 Change the ownership of a file to that of the parent directory.
205 Do this by fd if possible.
206 ****************************************************************************/
207
208 void change_file_owner_to_parent(connection_struct *conn,
209 const char *inherit_from_dir,
210 files_struct *fsp)
211 {
212 struct smb_filename *smb_fname_parent = NULL;
213 NTSTATUS status;
214 int ret;
215
216 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
217 NULL, NULL, &smb_fname_parent);
218 if (!NT_STATUS_IS_OK(status)) {
219 return;
220 }
221
222 ret = SMB_VFS_STAT(conn, smb_fname_parent);
223 if (ret == -1) {
224 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
225 "directory %s. Error was %s\n",
226 smb_fname_str_dbg(smb_fname_parent),
227 strerror(errno)));
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 }
241
242 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
243 "parent directory uid %u.\n", fsp_str_dbg(fsp),
244 (unsigned int)smb_fname_parent->st.st_ex_uid));
245
246 TALLOC_FREE(smb_fname_parent);
247 }
248
249 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
250 const char *inherit_from_dir,
251 const char *fname,
252 SMB_STRUCT_STAT *psbuf)
253 {
254 struct smb_filename *smb_fname_parent = NULL;
255 struct smb_filename *smb_fname_cwd = NULL;
256 char *saved_dir = NULL;
257 TALLOC_CTX *ctx = talloc_tos();
258 NTSTATUS status = NT_STATUS_OK;
259 int ret;
260
261 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
262 &smb_fname_parent);
263 if (!NT_STATUS_IS_OK(status)) {
264 return status;
265 }
266
267 ret = SMB_VFS_STAT(conn, smb_fname_parent);
268 if (ret == -1) {
269 status = map_nt_error_from_unix(errno);
270 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
271 "directory %s. Error was %s\n",
272 smb_fname_str_dbg(smb_fname_parent),
273 strerror(errno)));
274 goto out;
275 }
276
277 /* We've already done an lstat into psbuf, and we know it's a
278 directory. If we can cd into the directory and the dev/ino
279 are the same then we can safely chown without races as
280 we're locking the directory in place by being in it. This
281 should work on any UNIX (thanks tridge :-). JRA.
282 */
283
284 saved_dir = vfs_GetWd(ctx,conn);
285 if (!saved_dir) {
286 status = map_nt_error_from_unix(errno);
287 DEBUG(0,("change_dir_owner_to_parent: failed to get "
288 "current working directory. Error was %s\n",
289 strerror(errno)));
290 goto out;
291 }
292
293 /* Chdir into the new path. */
294 if (vfs_ChDir(conn, fname) == -1) {
295 status = map_nt_error_from_unix(errno);
296 DEBUG(0,("change_dir_owner_to_parent: failed to change "
297 "current working directory to %s. Error "
298 "was %s\n", fname, strerror(errno) ));
299 goto chdir;
300 }
301
302 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
303 &smb_fname_cwd);
304 if (!NT_STATUS_IS_OK(status)) {
305 return status;
306 }
307
308 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
309 if (ret == -1) {
310 status = map_nt_error_from_unix(errno);
311 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
312 "directory '.' (%s) Error was %s\n",
313 fname, strerror(errno)));
314 goto chdir;
315 }
316
317 /* Ensure we're pointing at the same place. */
318 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
319 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino ||
320 smb_fname_cwd->st.st_ex_mode != psbuf->st_ex_mode ) {
321 DEBUG(0,("change_dir_owner_to_parent: "
322 "device/inode/mode on directory %s changed. "
323 "Refusing to chown !\n", fname ));
324 status = NT_STATUS_ACCESS_DENIED;
325 goto chdir;
326 }
327
328 become_root();
329 ret = SMB_VFS_CHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
330 (gid_t)-1);
331 unbecome_root();
332 if (ret == -1) {
333 status = map_nt_error_from_unix(errno);
334 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
335 "directory %s to parent directory uid %u. "
336 "Error was %s\n", fname,
337 (unsigned int)smb_fname_parent->st.st_ex_uid,
338 strerror(errno) ));
339 goto chdir;
340 }
341
342 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
343 "directory %s to parent directory uid %u.\n",
344 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
345
346 chdir:
347 vfs_ChDir(conn,saved_dir);
348 out:
349 TALLOC_FREE(smb_fname_parent);
350 TALLOC_FREE(smb_fname_cwd);
351 return status;
352 }
353
354 /****************************************************************************
355 Open a file.
356 ****************************************************************************/
357
358 static NTSTATUS open_file(files_struct *fsp,
359 connection_struct *conn,
360 struct smb_request *req,
361 const char *parent_dir,
362 int flags,
363 mode_t unx_mode,
364 uint32 access_mask, /* client requested access mask. */
365 uint32 open_access_mask) /* what we're actually using in the open. */
366 {
367 struct smb_filename *smb_fname = fsp->fsp_name;
368 NTSTATUS status = NT_STATUS_OK;
369 int accmode = (flags & O_ACCMODE);
370 int local_flags = flags;
371 bool file_existed = VALID_STAT(fsp->fsp_name->st);
372
373 fsp->fh->fd = -1;
374 errno = EPERM;
375
376 /* Check permissions */
377
378 /*
379 * This code was changed after seeing a client open request
380 * containing the open mode of (DENY_WRITE/read-only) with
381 * the 'create if not exist' bit set. The previous code
382 * would fail to open the file read only on a read-only share
383 * as it was checking the flags parameter directly against O_RDONLY,
384 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
385 * JRA.
386 */
387
388 if (!CAN_WRITE(conn)) {
389 /* It's a read-only share - fail if we wanted to write. */
390 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
391 DEBUG(3,("Permission denied opening %s\n",
392 smb_fname_str_dbg(smb_fname)));
393 return NT_STATUS_ACCESS_DENIED;
394 } else if(flags & O_CREAT) {
395 /* We don't want to write - but we must make sure that
396 O_CREAT doesn't create the file if we have write
397 access into the directory.
398 */
399 flags &= ~(O_CREAT|O_EXCL);
400 local_flags &= ~(O_CREAT|O_EXCL);
401 }
402 }
403
404 /*
405 * This little piece of insanity is inspired by the
406 * fact that an NT client can open a file for O_RDONLY,
407 * but set the create disposition to FILE_EXISTS_TRUNCATE.
408 * If the client *can* write to the file, then it expects to
409 * truncate the file, even though it is opening for readonly.
410 * Quicken uses this stupid trick in backup file creation...
411 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
412 * for helping track this one down. It didn't bite us in 2.0.x
413 * as we always opened files read-write in that release. JRA.
414 */
415
416 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
417 DEBUG(10,("open_file: truncate requested on read-only open "
418 "for file %s\n", smb_fname_str_dbg(smb_fname)));
419 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
420 }
421
422 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
423 (!file_existed && (local_flags & O_CREAT)) ||
424 ((local_flags & O_TRUNC) == O_TRUNC) ) {
425 const char *wild;
426
427 /*
428 * We can't actually truncate here as the file may be locked.
429 * open_file_ntcreate will take care of the truncate later. JRA.
430 */
431
432 local_flags &= ~O_TRUNC;
433
434 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
435 /*
436 * We would block on opening a FIFO with no one else on the
437 * other end. Do what we used to do and add O_NONBLOCK to the
438 * open flags. JRA.
439 */
440
441 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
442 local_flags |= O_NONBLOCK;
443 }
444 #endif
445
446 /* Don't create files with Microsoft wildcard characters. */
447 if (fsp->base_fsp) {
448 /*
449 * wildcard characters are allowed in stream names
450 * only test the basefilename
451 */
452 wild = fsp->base_fsp->fsp_name->base_name;
453 } else {
454 wild = smb_fname->base_name;
455 }
456 if ((local_flags & O_CREAT) && !file_existed &&
457 ms_has_wild(wild)) {
458 return NT_STATUS_OBJECT_NAME_INVALID;
459 }
460
461 /* Actually do the open */
462 status = fd_open(conn, fsp, local_flags, unx_mode);
463 if (!NT_STATUS_IS_OK(status)) {
464 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
465 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
466 nt_errstr(status),local_flags,flags));
467 return status;
468 }
469
470 if ((local_flags & O_CREAT) && !file_existed) {
471
472 /* Inherit the ACL if required */
473 if (lp_inherit_perms(SNUM(conn))) {
474 inherit_access_posix_acl(conn, parent_dir,
475 smb_fname->base_name,
476 unx_mode);
477 }
478
479 /* Change the owner if required. */
480 if (lp_inherit_owner(SNUM(conn))) {
481 change_file_owner_to_parent(conn, parent_dir,
482 fsp);
483 }
484
485 notify_fname(conn, NOTIFY_ACTION_ADDED,
486 FILE_NOTIFY_CHANGE_FILE_NAME,
487 smb_fname->base_name);
488 }
489
490 } else {
491 fsp->fh->fd = -1; /* What we used to call a stat open. */
492 if (file_existed) {
493 uint32_t access_granted = 0;
494
495 status = smbd_check_open_rights(conn,
496 smb_fname,
497 access_mask,
498 &access_granted);
499 if (!NT_STATUS_IS_OK(status)) {
500 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
501 /*
502 * On NT_STATUS_ACCESS_DENIED, access_granted
503 * contains the denied bits.
504 */
505
506 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
507 (access_granted & FILE_WRITE_ATTRIBUTES) &&
508 (lp_map_readonly(SNUM(conn)) ||
509 lp_map_archive(SNUM(conn)) ||
510 lp_map_hidden(SNUM(conn)) ||
511 lp_map_system(SNUM(conn)))) {
512 access_granted &= ~FILE_WRITE_ATTRIBUTES;
513
514 DEBUG(10,("open_file: "
515 "overrode "
516 "FILE_WRITE_"
517 "ATTRIBUTES "
518 "on file %s\n",
519 smb_fname_str_dbg(
520 smb_fname)));
521 }
522
523 if ((access_mask & DELETE_ACCESS) &&
524 (access_granted & DELETE_ACCESS) &&
525 can_delete_file_in_directory(conn,
526 smb_fname)) {
527 /* Were we trying to do a stat open
528 * for delete and didn't get DELETE
529 * access (only) ? Check if the
530 * directory allows DELETE_CHILD.
531 * See here:
532 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
533 * for details. */
534
535 access_granted &= ~DELETE_ACCESS;
536
537 DEBUG(10,("open_file: "
538 "overrode "
539 "DELETE_ACCESS on "
540 "file %s\n",
541 smb_fname_str_dbg(
542 smb_fname)));
543 }
544
545 if (access_granted != 0) {
546 DEBUG(10,("open_file: Access "
547 "denied on file "
548 "%s\n",
549 smb_fname_str_dbg(
550 smb_fname)));
551 return status;
552 }
553 } else if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
554 fsp->posix_open &&
555 S_ISLNK(smb_fname->st.st_ex_mode)) {
556 /* This is a POSIX stat open for delete
557 * or rename on a symlink that points
558 * nowhere. Allow. */
559 DEBUG(10,("open_file: allowing POSIX "
560 "open on bad symlink %s\n",
561 smb_fname_str_dbg(
562 smb_fname)));
563 } else {
564 DEBUG(10,("open_file: "
565 "smbd_check_open_rights on file "
566 "%s returned %s\n",
567 smb_fname_str_dbg(smb_fname),
568 nt_errstr(status) ));
569 return status;
570 }
571 }
572 }
573 }
574
575 if (!file_existed) {
576 int ret;
577
578 if (fsp->fh->fd == -1) {
579 ret = SMB_VFS_STAT(conn, smb_fname);
580 } else {
581 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
582 /* If we have an fd, this stat should succeed. */
583 if (ret == -1) {
584 DEBUG(0,("Error doing fstat on open file %s "
585 "(%s)\n",
586 smb_fname_str_dbg(smb_fname),
587 strerror(errno) ));
588 }
589 }
590
591 /* For a non-io open, this stat failing means file not found. JRA */
592 if (ret == -1) {
593 status = map_nt_error_from_unix(errno);
594 fd_close(fsp);
595 return status;
596 }
597 }
598
599 /*
600 * POSIX allows read-only opens of directories. We don't
601 * want to do this (we use a different code path for this)
602 * so catch a directory open and return an EISDIR. JRA.
603 */
604
605 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
606 fd_close(fsp);
607 errno = EISDIR;
608 return NT_STATUS_FILE_IS_A_DIRECTORY;
609 }
610
611 fsp->mode = smb_fname->st.st_ex_mode;
612 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
613 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
614 fsp->file_pid = req ? req->smbpid : 0;
615 fsp->can_lock = True;
616 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
617 if (!CAN_WRITE(conn)) {
618 fsp->can_write = False;
619 } else {
620 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
621 True : False;
622 }
623 fsp->print_file = NULL;
624 fsp->modified = False;
625 fsp->sent_oplock_break = NO_BREAK_SENT;
626 fsp->is_directory = False;
627 if (conn->aio_write_behind_list &&
628 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
629 conn->case_sensitive)) {
630 fsp->aio_write_behind = True;
631 }
632
633 fsp->wcp = NULL; /* Write cache pointer. */
634
635 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
636 conn->server_info->unix_name,
637 smb_fname_str_dbg(smb_fname),
638 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
639 conn->num_files_open));
640
641 errno = 0;
642 return NT_STATUS_OK;
643 }
644
645 /*******************************************************************
646 Return True if the filename is one of the special executable types.
647 ********************************************************************/
648
649 bool is_executable(const char *fname)
650 {
651 if ((fname = strrchr_m(fname,'.'))) {
652 if (strequal(fname,".com") ||
653 strequal(fname,".dll") ||
654 strequal(fname,".exe") ||
655 strequal(fname,".sym")) {
656 return True;
657 }
658 }
659 return False;
660 }
661
662 /****************************************************************************
663 Check if we can open a file with a share mode.
664 Returns True if conflict, False if not.
665 ****************************************************************************/
666
667 static bool share_conflict(struct share_mode_entry *entry,
668 uint32 access_mask,
669 uint32 share_access)
670 {
671 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
672 "entry->share_access = 0x%x, "
673 "entry->private_options = 0x%x\n",
674 (unsigned int)entry->access_mask,
675 (unsigned int)entry->share_access,
676 (unsigned int)entry->private_options));
677
678 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
679 (unsigned int)access_mask, (unsigned int)share_access));
680
681 if ((entry->access_mask & (FILE_WRITE_DATA|
682 FILE_APPEND_DATA|
683 FILE_READ_DATA|
684 FILE_EXECUTE|
685 DELETE_ACCESS)) == 0) {
686 DEBUG(10,("share_conflict: No conflict due to "
687 "entry->access_mask = 0x%x\n",
688 (unsigned int)entry->access_mask ));
689 return False;
690 }
691
692 if ((access_mask & (FILE_WRITE_DATA|
693 FILE_APPEND_DATA|
694 FILE_READ_DATA|
695 FILE_EXECUTE|
696 DELETE_ACCESS)) == 0) {
697 DEBUG(10,("share_conflict: No conflict due to "
698 "access_mask = 0x%x\n",
699 (unsigned int)access_mask ));
700 return False;
701 }
702
703 #if 1 /* JRA TEST - Superdebug. */
704 #define CHECK_MASK(num, am, right, sa, share) \
705 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
706 (unsigned int)(num), (unsigned int)(am), \
707 (unsigned int)(right), (unsigned int)(am)&(right) )); \
708 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
709 (unsigned int)(num), (unsigned int)(sa), \
710 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
711 if (((am) & (right)) && !((sa) & (share))) { \
712 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
713 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
714 (unsigned int)(share) )); \
715 return True; \
716 }
717 #else
718 #define CHECK_MASK(num, am, right, sa, share) \
719 if (((am) & (right)) && !((sa) & (share))) { \
720 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
721 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
722 (unsigned int)(share) )); \
723 return True; \
724 }
725 #endif
726
727 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
728 share_access, FILE_SHARE_WRITE);
729 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
730 entry->share_access, FILE_SHARE_WRITE);
731
732 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
733 share_access, FILE_SHARE_READ);
734 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
735 entry->share_access, FILE_SHARE_READ);
736
737 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
738 share_access, FILE_SHARE_DELETE);
739 CHECK_MASK(6, access_mask, DELETE_ACCESS,
740 entry->share_access, FILE_SHARE_DELETE);
741
742 DEBUG(10,("share_conflict: No conflict.\n"));
743 return False;
744 }
745
746 #if defined(DEVELOPER)
747 static void validate_my_share_entries(struct smbd_server_connection *sconn,
748 int num,
749 struct share_mode_entry *share_entry)
750 {
751 files_struct *fsp;
752
753 if (!procid_is_me(&share_entry->pid)) {
754 return;
755 }
756
757 if (is_deferred_open_entry(share_entry) &&
758 !open_was_deferred(share_entry->op_mid)) {
759 char *str = talloc_asprintf(talloc_tos(),
760 "Got a deferred entry without a request: "
761 "PANIC: %s\n",
762 share_mode_str(talloc_tos(), num, share_entry));
763 smb_panic(str);
764 }
765
766 if (!is_valid_share_mode_entry(share_entry)) {
767 return;
768 }
769
770 fsp = file_find_dif(sconn, share_entry->id,
771 share_entry->share_file_id);
772 if (!fsp) {
773 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
774 share_mode_str(talloc_tos(), num, share_entry) ));
775 smb_panic("validate_my_share_entries: Cannot match a "
776 "share entry with an open file\n");
777 }
778
779 if (is_deferred_open_entry(share_entry) ||
780 is_unused_share_mode_entry(share_entry)) {
781 goto panic;
782 }
783
784 if ((share_entry->op_type == NO_OPLOCK) &&
785 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
786 /* Someone has already written to it, but I haven't yet
787 * noticed */
788 return;
789 }
790
791 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
792 goto panic;
793 }
794
795 return;
796
797 panic:
798 {
799 char *str;
800 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
801 share_mode_str(talloc_tos(), num, share_entry) ));
802 str = talloc_asprintf(talloc_tos(),
803 "validate_my_share_entries: "
804 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
805 fsp->fsp_name->base_name,
806 (unsigned int)fsp->oplock_type,
807 (unsigned int)share_entry->op_type );
808 smb_panic(str);
809 }
810 }
811 #endif
812
813 bool is_stat_open(uint32 access_mask)
814 {
815 return (access_mask &&
816 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
817 FILE_WRITE_ATTRIBUTES))==0) &&
818 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
819 FILE_WRITE_ATTRIBUTES)) != 0));
820 }
821
822 /****************************************************************************
823 Deal with share modes
824 Invarient: Share mode must be locked on entry and exit.
825 Returns -1 on error, or number of share modes on success (may be zero).
826 ****************************************************************************/
827
828 static NTSTATUS open_mode_check(connection_struct *conn,
829 struct share_mode_lock *lck,
830 uint32 access_mask,
831 uint32 share_access,
832 uint32 create_options,
833 bool *file_existed)
834 {
835 int i;
836
837 if(lck->num_share_modes == 0) {
838 return NT_STATUS_OK;
839 }
840
841 *file_existed = True;
842
843 /* A delete on close prohibits everything */
844
845 if (lck->delete_on_close) {
846 return NT_STATUS_DELETE_PENDING;
847 }
848
849 if (is_stat_open(access_mask)) {
850 /* Stat open that doesn't trigger oplock breaks or share mode
851 * checks... ! JRA. */
852 return NT_STATUS_OK;
853 }
854
855 /*
856 * Check if the share modes will give us access.
857 */
858
859 #if defined(DEVELOPER)
860 for(i = 0; i < lck->num_share_modes; i++) {
861 validate_my_share_entries(conn->sconn, i,
862 &lck->share_modes[i]);
863 }
864 #endif
865
866 if (!lp_share_modes(SNUM(conn))) {
867 return NT_STATUS_OK;
868 }
869
870 /* Now we check the share modes, after any oplock breaks. */
871 for(i = 0; i < lck->num_share_modes; i++) {
872
873 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
874 continue;
875 }
876
877 /* someone else has a share lock on it, check to see if we can
878 * too */
879 if (share_conflict(&lck->share_modes[i],
880 access_mask, share_access)) {
881 return NT_STATUS_SHARING_VIOLATION;
882 }
883 }
884
885 return NT_STATUS_OK;
886 }
887
888 static bool is_delete_request(files_struct *fsp) {
889 return ((fsp->access_mask == DELETE_ACCESS) &&
890 (fsp->oplock_type == NO_OPLOCK));
891 }
892
893 /*
894 * Send a break message to the oplock holder and delay the open for
895 * our client.
896 */
897
898 static NTSTATUS send_break_message(files_struct *fsp,
899 struct share_mode_entry *exclusive,
900 uint64_t mid,
901 int oplock_request)
902 {
903 NTSTATUS status;
904 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
905
906 DEBUG(10, ("Sending break request to PID %s\n",
907 procid_str_static(&exclusive->pid)));
908 exclusive->op_mid = mid;
909
910 /* Create the message. */
911 share_mode_entry_to_message(msg, exclusive);
912
913 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
914 don't want this set in the share mode struct pointed to by lck. */
915
916 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
917 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
918 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
919 }
920
921 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
922 MSG_SMB_BREAK_REQUEST,
923 (uint8 *)msg,
924 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
925 if (!NT_STATUS_IS_OK(status)) {
926 DEBUG(3, ("Could not send oplock break message: %s\n",
927 nt_errstr(status)));
928 }
929
930 return status;
931 }
932
933 /*
934 * 1) No files open at all or internal open: Grant whatever the client wants.
935 *
936 * 2) Exclusive (or batch) oplock around: If the requested access is a delete
937 * request, break if the oplock around is a batch oplock. If it's another
938 * requested access type, break.
939 *
940 * 3) Only level2 around: Grant level2 and do nothing else.
941 */
942
943 static bool delay_for_oplocks(struct share_mode_lock *lck,
944 files_struct *fsp,
945 uint64_t mid,
946 int pass_number,
947 int oplock_request)
948 {
949 int i;
950 struct share_mode_entry *exclusive = NULL;
951 bool valid_entry = false;
952 bool have_level2 = false;
953 bool have_a_none_oplock = false;
954 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
955 lp_level2_oplocks(SNUM(fsp->conn));
956
957 if (oplock_request & INTERNAL_OPEN_ONLY) {
958 fsp->oplock_type = NO_OPLOCK;
959 }
960
961 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
962 return false;
963 }
964
965 for (i=0; i<lck->num_share_modes; i++) {
966
967 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
968 continue;
969 }
970
971 /* At least one entry is not an invalid or deferred entry. */
972 valid_entry = true;
973
974 if (pass_number == 1) {
975 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
976 SMB_ASSERT(exclusive == NULL);
977 exclusive = &lck->share_modes[i];
978 }
979 } else {
980 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
981 SMB_ASSERT(exclusive == NULL);
982 exclusive = &lck->share_modes[i];
983 }
984 }
985
986 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
987 SMB_ASSERT(exclusive == NULL);
988 have_level2 = true;
989 }
990
991 if (lck->share_modes[i].op_type == NO_OPLOCK) {
992 have_a_none_oplock = true;
993 }
994 }
995
996 if (exclusive != NULL) { /* Found an exclusive oplock */
997 bool delay_it = is_delete_request(fsp) ?
998 BATCH_OPLOCK_TYPE(exclusive->op_type) : true;
999 SMB_ASSERT(!have_level2);
1000 if (delay_it) {
1001 send_break_message(fsp, exclusive, mid, oplock_request);
1002 return true;
1003 }
1004 }
1005
1006 /*
1007 * Match what was requested (fsp->oplock_type) with
1008 * what was found in the existing share modes.
1009 */
1010
1011 if (!valid_entry) {
1012 /* All entries are placeholders or deferred.
1013 * Directly grant whatever the client wants. */
1014 if (fsp->oplock_type == NO_OPLOCK) {
1015 /* Store a level2 oplock, but don't tell the client */
1016 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1017 }
1018 } else if (have_a_none_oplock) {
1019 fsp->oplock_type = NO_OPLOCK;
1020 } else if (have_level2) {
1021 if (fsp->oplock_type == NO_OPLOCK ||
1022 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1023 /* Store a level2 oplock, but don't tell the client */
1024 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1025 } else {
1026 fsp->oplock_type = LEVEL_II_OPLOCK;
1027 }
1028 } else {
1029 /* This case can never happen. */
1030 SMB_ASSERT(1);
1031 }
1032
1033 /*
1034 * Don't grant level2 to clients that don't want them
1035 * or if we've turned them off.
1036 */
1037 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1038 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1039 }
1040
1041 DEBUG(10,("delay_for_oplocks: oplock type 0x%x on file %s\n",
1042 fsp->oplock_type, fsp_str_dbg(fsp)));
1043
1044 /* No delay. */
1045 return false;
1046 }
1047
1048 bool request_timed_out(struct timeval request_time,
1049 struct timeval timeout)
1050 {
1051 struct timeval now, end_time;
1052 GetTimeOfDay(&now);
1053 end_time = timeval_sum(&request_time, &timeout);
1054 return (timeval_compare(&end_time, &now) < 0);
1055 }
1056
1057 /****************************************************************************
1058 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1059 ****************************************************************************/
1060
1061 static void defer_open(struct share_mode_lock *lck,
1062 struct timeval request_time,
1063 struct timeval timeout,
1064 struct smb_request *req,
1065 struct deferred_open_record *state)
1066 {
1067 int i;
1068
1069 /* Paranoia check */
1070
1071 for (i=0; i<lck->num_share_modes; i++) {
1072 struct share_mode_entry *e = &lck->share_modes[i];
1073
1074 if (!is_deferred_open_entry(e)) {
1075 continue;
1076 }
1077
1078 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1079 DEBUG(0, ("Trying to defer an already deferred "
1080 "request: mid=%llu, exiting\n",
1081 (unsigned long long)req->mid));
1082 exit_server("attempt to defer a deferred request");
1083 }
1084 }
1085
1086 /* End paranoia check */
1087
1088 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1089 "open entry for mid %llu\n",
1090 (unsigned int)request_time.tv_sec,
1091 (unsigned int)request_time.tv_usec,
1092 (unsigned long long)req->mid));
1093
1094 if (!push_deferred_open_message_smb(req, request_time, timeout,
1095 state->id, (char *)state, sizeof(*state))) {
1096 exit_server("push_deferred_open_message_smb failed");
1097 }
1098 add_deferred_open(lck, req->mid, request_time,
1099 sconn_server_id(req->sconn), state->id);
1100 }
1101
1102
1103 /****************************************************************************
1104 On overwrite open ensure that the attributes match.
1105 ****************************************************************************/
1106
1107 bool open_match_attributes(connection_struct *conn,
1108 uint32 old_dos_attr,
1109 uint32 new_dos_attr,
1110 mode_t existing_unx_mode,
1111 mode_t new_unx_mode,
1112 mode_t *returned_unx_mode)
1113 {
1114 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1115
1116 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1117 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1118
1119 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1120 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1121 *returned_unx_mode = new_unx_mode;
1122 } else {
1123 *returned_unx_mode = (mode_t)0;
1124 }
1125
1126 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1127 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1128 "returned_unx_mode = 0%o\n",
1129 (unsigned int)old_dos_attr,
1130 (unsigned int)existing_unx_mode,
1131 (unsigned int)new_dos_attr,
1132 (unsigned int)*returned_unx_mode ));
1133
1134 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1135 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1136 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1137 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1138 return False;
1139 }
1140 }
1141 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1142 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1143 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1144 return False;
1145 }
1146 }
1147 return True;
1148 }
1149
1150 /****************************************************************************
1151 Special FCB or DOS processing in the case of a sharing violation.
1152 Try and find a duplicated file handle.
1153 ****************************************************************************/
1154
1155 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1156 connection_struct *conn,
1157 files_struct *fsp_to_dup_into,
1158 const struct smb_filename *smb_fname,
1159 struct file_id id,
1160 uint16 file_pid,
1161 uint16 vuid,
1162 uint32 access_mask,
1163 uint32 share_access,
1164 uint32 create_options)
1165 {
1166 files_struct *fsp;
1167
1168 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1169 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1170
1171 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1172 fsp = file_find_di_next(fsp)) {
1173
1174 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1175 "vuid = %u, file_pid = %u, private_options = 0x%x "
1176 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1177 fsp->fh->fd, (unsigned int)fsp->vuid,
1178 (unsigned int)fsp->file_pid,
1179 (unsigned int)fsp->fh->private_options,
1180 (unsigned int)fsp->access_mask ));
1181
1182 if (fsp->fh->fd != -1 &&
1183 fsp->vuid == vuid &&
1184 fsp->file_pid == file_pid &&
1185 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1186 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1187 (fsp->access_mask & FILE_WRITE_DATA) &&
1188 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1189 strequal(fsp->fsp_name->stream_name,
1190 smb_fname->stream_name)) {
1191 DEBUG(10,("fcb_or_dos_open: file match\n"));
1192 break;
1193 }
1194 }
1195
1196 if (!fsp) {
1197 return NT_STATUS_NOT_FOUND;
1198 }
1199
1200 /* quite an insane set of semantics ... */
1201 if (is_executable(smb_fname->base_name) &&
1202 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1203 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1204 return NT_STATUS_INVALID_PARAMETER;
1205 }
1206
1207 /* We need to duplicate this fsp. */
1208 return dup_file_fsp(req, fsp, access_mask, share_access,
1209 create_options, fsp_to_dup_into);
1210 }
1211
1212 /****************************************************************************
1213 Open a file with a share mode - old openX method - map into NTCreate.
1214 ****************************************************************************/
1215
1216 bool map_open_params_to_ntcreate(const struct smb_filename *smb_fname,
1217 int deny_mode, int open_func,
1218 uint32 *paccess_mask,
1219 uint32 *pshare_mode,
1220 uint32 *pcreate_disposition,
1221 uint32 *pcreate_options,
1222 uint32_t *pprivate_flags)
1223 {
1224 uint32 access_mask;
1225 uint32 share_mode;
1226 uint32 create_disposition;
1227 uint32 create_options = FILE_NON_DIRECTORY_FILE;
1228 uint32_t private_flags = 0;
1229
1230 DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
1231 "open_func = 0x%x\n",
1232 smb_fname_str_dbg(smb_fname), (unsigned int)deny_mode,
1233 (unsigned int)open_func ));
1234
1235 /* Create the NT compatible access_mask. */
1236 switch (GET_OPENX_MODE(deny_mode)) {
1237 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
1238 case DOS_OPEN_RDONLY:
1239 access_mask = FILE_GENERIC_READ;
1240 break;
1241 case DOS_OPEN_WRONLY:
1242 access_mask = FILE_GENERIC_WRITE;
1243 break;
1244 case DOS_OPEN_RDWR:
1245 case DOS_OPEN_FCB:
1246 access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
1247 break;
1248 default:
1249 DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
1250 (unsigned int)GET_OPENX_MODE(deny_mode)));
1251 return False;
1252 }
1253
1254 /* Create the NT compatible create_disposition. */
1255 switch (open_func) {
1256 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
1257 create_disposition = FILE_CREATE;
1258 break;
1259
1260 case OPENX_FILE_EXISTS_OPEN:
1261 create_disposition = FILE_OPEN;
1262 break;
1263
1264 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
1265 create_disposition = FILE_OPEN_IF;
1266 break;
1267
1268 case OPENX_FILE_EXISTS_TRUNCATE:
1269 create_disposition = FILE_OVERWRITE;
1270 break;
1271
1272 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
1273 create_disposition = FILE_OVERWRITE_IF;
1274 break;
1275
1276 default:
1277 /* From samba4 - to be confirmed. */
1278 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
1279 create_disposition = FILE_CREATE;
1280 break;
1281 }
1282 DEBUG(10,("map_open_params_to_ntcreate: bad "
1283 "open_func 0x%x\n", (unsigned int)open_func));
1284 return False;
1285 }
1286
1287 /* Create the NT compatible share modes. */
1288 switch (GET_DENY_MODE(deny_mode)) {
1289 case DENY_ALL:
1290 share_mode = FILE_SHARE_NONE;
1291 break;
1292
1293 case DENY_WRITE:
1294 share_mode = FILE_SHARE_READ;
1295 break;
1296
1297 case DENY_READ:
1298 share_mode = FILE_SHARE_WRITE;
1299 break;
1300
1301 case DENY_NONE:
1302 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1303 break;
1304
1305 case DENY_DOS:
1306 private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1307 if (is_executable(smb_fname->base_name)) {
1308 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1309 } else {
1310 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1311 share_mode = FILE_SHARE_READ;
1312 } else {
1313 share_mode = FILE_SHARE_NONE;
1314 }
1315 }
1316 break;
1317
1318 case DENY_FCB:
1319 private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1320 share_mode = FILE_SHARE_NONE;
1321 break;
1322
1323 default:
1324 DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1325 (unsigned int)GET_DENY_MODE(deny_mode) ));
1326 return False;
1327 }
1328
1329 DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1330 "share_mode = 0x%x, create_disposition = 0x%x, "
1331 "create_options = 0x%x private_flags = 0x%x\n",
1332 smb_fname_str_dbg(smb_fname),
1333 (unsigned int)access_mask,
1334 (unsigned int)share_mode,
1335 (unsigned int)create_disposition,
1336 (unsigned int)create_options,
1337 (unsigned int)private_flags));
1338
1339 if (paccess_mask) {
1340 *paccess_mask = access_mask;
1341 }
1342 if (pshare_mode) {
1343 *pshare_mode = share_mode;
1344 }
1345 if (pcreate_disposition) {
1346 *pcreate_disposition = create_disposition;
1347 }
1348 if (pcreate_options) {
1349 *pcreate_options = create_options;
1350 }
1351 if (pprivate_flags) {
1352 *pprivate_flags = private_flags;
1353 }
1354
1355 return True;
1356
1357 }
1358
1359 static void schedule_defer_open(struct share_mode_lock *lck,
1360 struct timeval request_time,
1361 struct smb_request *req)
1362 {
1363 struct deferred_open_record state;
1364
1365 /* This is a relative time, added to the absolute
1366 request_time value to get the absolute timeout time.
1367 Note that if this is the second or greater time we enter
1368 this codepath for this particular request mid then
1369 request_time is left as the absolute time of the *first*
1370 time this request mid was processed. This is what allows
1371 the request to eventually time out. */
1372
1373 struct timeval timeout;
1374
1375 /* Normally the smbd we asked should respond within
1376 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1377 * the client did, give twice the timeout as a safety
1378 * measure here in case the other smbd is stuck
1379 * somewhere else. */
1380
1381 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1382
1383 /* Nothing actually uses state.delayed_for_oplocks
1384 but it's handy to differentiate in debug messages
1385 between a 30 second delay due to oplock break, and
1386 a 1 second delay for share mode conflicts. */
1387
1388 state.delayed_for_oplocks = True;
1389 state.id = lck->id;
1390
1391 if (!request_timed_out(request_time, timeout)) {
1392 defer_open(lck, request_time, timeout, req, &state);
1393 }
1394 }
1395
1396 /****************************************************************************
1397 Work out what access_mask to use from what the client sent us.
1398 ****************************************************************************/
1399
1400 static NTSTATUS calculate_access_mask(connection_struct *conn,
1401 const struct smb_filename *smb_fname,
1402 bool file_existed,
1403 uint32_t access_mask,
1404 uint32_t *access_mask_out)
1405 {
1406 NTSTATUS status;
1407
1408 /*
1409 * Convert GENERIC bits to specific bits.
1410 */
1411
1412 se_map_generic(&access_mask, &file_generic_mapping);
1413
1414 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1415 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1416 if (file_existed) {
1417
1418 struct security_descriptor *sd;
1419 uint32_t access_granted = 0;
1420
1421 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1422 (SECINFO_OWNER |
1423 SECINFO_GROUP |
1424 SECINFO_DACL),&sd);
1425
1426 if (!NT_STATUS_IS_OK(status)) {
1427 DEBUG(10, ("calculate_access_mask: Could not get acl "
1428 "on file %s: %s\n",
1429 smb_fname_str_dbg(smb_fname),
1430 nt_errstr(status)));
1431 return NT_STATUS_ACCESS_DENIED;
1432 }
1433
1434 status = smb1_file_se_access_check(conn,
1435 sd,
1436 get_current_nttok(conn),
1437 access_mask,
1438 &access_granted);
1439
1440 TALLOC_FREE(sd);
1441
1442 if (!NT_STATUS_IS_OK(status)) {
1443 DEBUG(10, ("calculate_access_mask: Access denied on "
1444 "file %s: when calculating maximum access\n",
1445 smb_fname_str_dbg(smb_fname)));
1446 return NT_STATUS_ACCESS_DENIED;
1447 }
1448
1449 access_mask = access_granted;
1450 } else {
1451 access_mask = FILE_GENERIC_ALL;
1452 }
1453 }
1454
1455 *access_mask_out = access_mask;
1456 return NT_STATUS_OK;
1457 }
1458
1459 /****************************************************************************
1460 Remove the deferred open entry under lock.
1461 ****************************************************************************/
1462
1463 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1464 struct server_id pid)
1465 {
1466 struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1467 NULL, NULL, NULL);
1468 if (lck == NULL) {
1469 DEBUG(0, ("could not get share mode lock\n"));
1470 } else {
1471 del_deferred_open_entry(lck, mid, pid);
1472 TALLOC_FREE(lck);
1473 }
1474 }
1475
1476 /****************************************************************************
1477 Open a file with a share mode. Passed in an already created files_struct *.
1478 ****************************************************************************/
1479
1480 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1481 struct smb_request *req,
1482 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1483 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1484 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1485 uint32 create_options, /* options such as delete on close. */
1486 uint32 new_dos_attributes, /* attributes used for new file. */
1487 int oplock_request, /* internal Samba oplock codes. */
1488 /* Information (FILE_EXISTS etc.) */
1489 uint32_t private_flags, /* Samba specific flags. */
1490 int *pinfo,
1491 files_struct *fsp)
1492 {
1493 struct smb_filename *smb_fname = fsp->fsp_name;
1494 int flags=0;
1495 int flags2=0;
1496 bool file_existed = VALID_STAT(smb_fname->st);
1497 bool def_acl = False;
1498 bool posix_open = False;
1499 bool new_file_created = False;
1500 bool clear_ads = false;
1501 struct file_id id;
1502 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1503 mode_t new_unx_mode = (mode_t)0;
1504 mode_t unx_mode = (mode_t)0;
1505 int info;
1506 uint32 existing_dos_attributes = 0;
1507 struct timeval request_time = timeval_zero();
1508 struct share_mode_lock *lck = NULL;
1509 uint32 open_access_mask = access_mask;
1510 NTSTATUS status;
1511 char *parent_dir;
1512
1513 ZERO_STRUCT(id);
1514
1515 /* Windows allows a new file to be created and
1516 silently removes a FILE_ATTRIBUTE_DIRECTORY
1517 sent by the client. Do the same. */
1518
1519 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1520
1521 if (conn->printer) {
1522 /*
1523 * Printers are handled completely differently.
1524 * Most of the passed parameters are ignored.
1525 */
1526
1527 if (pinfo) {
1528 *pinfo = FILE_WAS_CREATED;
1529 }
1530
1531 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1532 smb_fname_str_dbg(smb_fname)));
1533
1534 if (!req) {
1535 DEBUG(0,("open_file_ntcreate: printer open without "
1536 "an SMB request!\n"));
1537 return NT_STATUS_INTERNAL_ERROR;
1538 }
1539
1540 return print_spool_open(fsp, smb_fname->base_name,
1541 req->vuid);
1542 }
1543
1544 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1545 NULL)) {
1546 return NT_STATUS_NO_MEMORY;
1547 }
1548
1549 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1550 posix_open = True;
1551 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1552 new_dos_attributes = 0;
1553 } else {
1554 /* We add aARCH to this as this mode is only used if the file is
1555 * created new. */
1556 unx_mode = unix_mode(conn, new_dos_attributes | aARCH,
1557 smb_fname, parent_dir);
1558 }
1559
1560 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1561 "access_mask=0x%x share_access=0x%x "
1562 "create_disposition = 0x%x create_options=0x%x "
1563 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1564 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1565 access_mask, share_access, create_disposition,
1566 create_options, (unsigned int)unx_mode, oplock_request,
1567 (unsigned int)private_flags));
1568
1569 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1570 DEBUG(0, ("No smb request but not an internal only open!\n"));
1571 return NT_STATUS_INTERNAL_ERROR;
1572 }
1573
1574 /*
1575 * Only non-internal opens can be deferred at all
1576 */
1577
1578 if (req) {
1579 void *ptr;
1580 if (get_deferred_open_message_state(req,
1581 &request_time,
1582 &ptr)) {
1583
1584 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1585 /* Remember the absolute time of the original
1586 request with this mid. We'll use it later to
1587 see if this has timed out. */
1588
1589 /* Remove the deferred open entry under lock. */
1590 remove_deferred_open_entry(
1591 state->id, req->mid,
1592 sconn_server_id(req->sconn));
1593
1594 /* Ensure we don't reprocess this message. */
1595 remove_deferred_open_message_smb(req->mid);
1596 }
1597 }
1598
1599 status = check_name(conn, smb_fname->base_name);
1600 if (!NT_STATUS_IS_OK(status)) {
1601 return status;
1602 }
1603
1604 if (!posix_open) {
1605 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1606 if (file_existed) {
1607 existing_dos_attributes = dos_mode(conn, smb_fname);
1608 }
1609 }
1610
1611 /* ignore any oplock requests if oplocks are disabled */
1612 if (!lp_oplocks(SNUM(conn)) ||
1613 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1614 /* Mask off everything except the private Samba bits. */
1615 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1616 }
1617
1618 /* this is for OS/2 long file names - say we don't support them */
1619 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1620 /* OS/2 Workplace shell fix may be main code stream in a later
1621 * release. */
1622 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1623 "supported.\n"));
1624 if (use_nt_status()) {
1625 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1626 }
1627 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1628 }
1629
1630 switch( create_disposition ) {
1631 /*
1632 * Currently we're using FILE_SUPERSEDE as the same as
1633 * FILE_OVERWRITE_IF but they really are
1634 * different. FILE_SUPERSEDE deletes an existing file
1635 * (requiring delete access) then recreates it.
1636 */
1637 case FILE_SUPERSEDE:
1638 /* If file exists replace/overwrite. If file doesn't
1639 * exist create. */
1640 flags2 |= (O_CREAT | O_TRUNC);
1641 clear_ads = true;
1642 break;
1643
1644 case FILE_OVERWRITE_IF:
1645 /* If file exists replace/overwrite. If file doesn't
1646 * exist create. */
1647 flags2 |= (O_CREAT | O_TRUNC);
1648 clear_ads = true;
1649 break;
1650
1651 case FILE_OPEN:
1652 /* If file exists open. If file doesn't exist error. */
1653 if (!file_existed) {
1654 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1655 "requested for file %s and file "
1656 "doesn't exist.\n",
1657 smb_fname_str_dbg(smb_fname)));
1658 errno = ENOENT;
1659 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1660 }
1661 break;
1662
1663 case FILE_OVERWRITE:
1664 /* If file exists overwrite. If file doesn't exist
1665 * error. */
1666 if (!file_existed) {
1667 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1668 "requested for file %s and file "
1669 "doesn't exist.\n",
1670 smb_fname_str_dbg(smb_fname) ));
1671 errno = ENOENT;
1672 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1673 }
1674 flags2 |= O_TRUNC;
1675 clear_ads = true;
1676 break;
1677
1678 case FILE_CREATE:
1679 /* If file exists error. If file doesn't exist
1680 * create. */
1681 if (file_existed) {
1682 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1683 "requested for file %s and file "
1684 "already exists.\n",
1685 smb_fname_str_dbg(smb_fname)));
1686 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1687 errno = EISDIR;
1688 } else {
1689 errno = EEXIST;
1690 }
1691 return map_nt_error_from_unix(errno);
1692 }
1693 flags2 |= (O_CREAT|O_EXCL);
1694 break;
1695
1696 case FILE_OPEN_IF:
1697 /* If file exists open. If file doesn't exist
1698 * create. */
1699 flags2 |= O_CREAT;
1700 break;
1701
1702 default:
1703 return NT_STATUS_INVALID_PARAMETER;
1704 }
1705
1706 /* We only care about matching attributes on file exists and
1707 * overwrite. */
1708
1709 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1710 (create_disposition == FILE_OVERWRITE_IF))) {
1711 if (!open_match_attributes(conn, existing_dos_attributes,
1712 new_dos_attributes,
1713 smb_fname->st.st_ex_mode,
1714 unx_mode, &new_unx_mode)) {
1715 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1716 "for file %s (%x %x) (0%o, 0%o)\n",
1717 smb_fname_str_dbg(smb_fname),
1718 existing_dos_attributes,
1719 new_dos_attributes,
1720 (unsigned int)smb_fname->st.st_ex_mode,
1721 (unsigned int)unx_mode ));
1722 errno = EACCES;
1723 return NT_STATUS_ACCESS_DENIED;
1724 }
1725 }
1726
1727 status = calculate_access_mask(conn, smb_fname, file_existed,
1728 access_mask,
1729 &access_mask);
1730 if (!NT_STATUS_IS_OK(status)) {
1731 DEBUG(10, ("open_file_ntcreate: calculate_access_mask "
1732 "on file %s returned %s\n",
1733 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1734 return status;
1735 }
1736
1737 open_access_mask = access_mask;
1738
1739 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1740 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1741 }
1742
1743 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1744 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1745 access_mask));
1746
1747 /*
1748 * Note that we ignore the append flag as append does not
1749 * mean the same thing under DOS and Unix.
1750 */
1751
1752 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1753 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1754 /* DENY_DOS opens are always underlying read-write on the
1755 file handle, no matter what the requested access mask
1756 says. */
1757 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1758 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1759 flags = O_RDWR;
1760 } else {
1761 flags = O_WRONLY;
1762 }
1763 } else {
1764 flags = O_RDONLY;
1765 }
1766
1767 /*
1768 * Currently we only look at FILE_WRITE_THROUGH for create options.
1769 */
1770
1771 #if defined(O_SYNC)
1772 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1773 flags2 |= O_SYNC;
1774 }
1775 #endif /* O_SYNC */
1776
1777 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1778 flags2 |= O_APPEND;
1779 }
1780
1781 if (!posix_open && !CAN_WRITE(conn)) {
1782 /*
1783 * We should really return a permission denied error if either
1784 * O_CREAT or O_TRUNC are set, but for compatibility with
1785 * older versions of Samba we just AND them out.
1786 */
1787 flags2 &= ~(O_CREAT|O_TRUNC);
1788 }
1789
1790 /*
1791 * Ensure we can't write on a read-only share or file.
1792 */
1793
1794 if (flags != O_RDONLY && file_existed &&
1795 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1796 DEBUG(5,("open_file_ntcreate: write access requested for "
1797 "file %s on read only %s\n",
1798 smb_fname_str_dbg(smb_fname),
1799 !CAN_WRITE(conn) ? "share" : "file" ));
1800 errno = EACCES;
1801 return NT_STATUS_ACCESS_DENIED;
1802 }
1803
1804 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1805 fsp->share_access = share_access;
1806 fsp->fh->private_options = private_flags;
1807 fsp->access_mask = open_access_mask; /* We change this to the
1808 * requested access_mask after
1809 * the open is done. */
1810 fsp->posix_open = posix_open;
1811
1812 /* Ensure no SAMBA_PRIVATE bits can be set. */
1813 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1814
1815 if (timeval_is_zero(&request_time)) {
1816 request_time = fsp->open_time;
1817 }
1818
1819 if (file_existed) {
1820 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1821 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1822
1823 lck = get_share_mode_lock(talloc_tos(), id,
1824 conn->connectpath,
1825 smb_fname, &old_write_time);
1826
1827 if (lck == NULL) {
1828 DEBUG(0, ("Could not get share mode lock\n"));
1829 return NT_STATUS_SHARING_VIOLATION;
1830 }
1831
1832 /* First pass - send break only on batch oplocks. */
1833 if ((req != NULL)
1834 && delay_for_oplocks(lck, fsp, req->mid, 1,
1835 oplock_request)) {
1836 schedule_defer_open(lck, request_time, req);
1837 TALLOC_FREE(lck);
1838 return NT_STATUS_SHARING_VIOLATION;
1839 }
1840
1841 /* Use the client requested access mask here, not the one we
1842 * open with. */
1843 status = open_mode_check(conn, lck, access_mask, share_access,
1844 create_options, &file_existed);
1845
1846 if (NT_STATUS_IS_OK(status)) {
1847 /* We might be going to allow this open. Check oplock
1848 * status again. */
1849 /* Second pass - send break for both batch or
1850 * exclusive oplocks. */
1851 if ((req != NULL)
1852 && delay_for_oplocks(lck, fsp, req->mid, 2,
1853 oplock_request)) {
1854 schedule_defer_open(lck, request_time, req);
1855 TALLOC_FREE(lck);
1856 return NT_STATUS_SHARING_VIOLATION;
1857 }
1858 }
1859
1860 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1861 /* DELETE_PENDING is not deferred for a second */
1862 TALLOC_FREE(lck);
1863 return status;
1864 }
1865
1866 if (!NT_STATUS_IS_OK(status)) {
1867 uint32 can_access_mask;
1868 bool can_access = True;
1869
1870 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1871
1872 /* Check if this can be done with the deny_dos and fcb
1873 * calls. */
1874 if (private_flags &
1875 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1876 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1877 if (req == NULL) {
1878 DEBUG(0, ("DOS open without an SMB "
1879 "request!\n"));
1880 TALLOC_FREE(lck);
1881 return NT_STATUS_INTERNAL_ERROR;
1882 }
1883
1884 /* Use the client requested access mask here,
1885 * not the one we open with. */
1886 status = fcb_or_dos_open(req,
1887 conn,
1888 fsp,
1889 smb_fname,
1890 id,
1891 req->smbpid,
1892 req->vuid,
1893 access_mask,
1894 share_access,
1895 create_options);
1896
1897 if (NT_STATUS_IS_OK(status)) {
1898 TALLOC_FREE(lck);
1899 if (pinfo) {
1900 *pinfo = FILE_WAS_OPENED;
1901 }
1902 return NT_STATUS_OK;
1903 }
1904 }
1905
1906 /*
1907 * This next line is a subtlety we need for
1908 * MS-Access. If a file open will fail due to share
1909 * permissions and also for security (access) reasons,
1910 * we need to return the access failed error, not the
1911 * share error. We can't open the file due to kernel
1912 * oplock deadlock (it's possible we failed above on
1913 * the open_mode_check()) so use a userspace check.
1914 */
1915
1916 if (flags & O_RDWR) {
1917 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1918 } else if (flags & O_WRONLY) {
1919 can_access_mask = FILE_WRITE_DATA;
1920 } else {
1921 can_access_mask = FILE_READ_DATA;
1922 }
1923
1924 if (((can_access_mask & FILE_WRITE_DATA) &&
1925 !CAN_WRITE(conn)) ||
1926 !can_access_file_data(conn, smb_fname,
1927 can_access_mask)) {
1928 can_access = False;
1929 }
1930
1931 /*
1932 * If we're returning a share violation, ensure we
1933 * cope with the braindead 1 second delay.
1934 */
1935
1936 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1937 lp_defer_sharing_violations()) {
1938 struct timeval timeout;
1939 struct deferred_open_record state;
1940 int timeout_usecs;
1941
1942 /* this is a hack to speed up torture tests
1943 in 'make test' */
1944 timeout_usecs = lp_parm_int(SNUM(conn),
1945 "smbd","sharedelay",
1946 SHARING_VIOLATION_USEC_WAIT);
1947
1948 /* This is a relative time, added to the absolute
1949 request_time value to get the absolute timeout time.
1950 Note that if this is the second or greater time we enter
1951 this codepath for this particular request mid then
1952 request_time is left as the absolute time of the *first*
1953 time this request mid was processed. This is what allows
1954 the request to eventually time out. */
1955
1956 timeout = timeval_set(0, timeout_usecs);
1957
1958 /* Nothing actually uses state.delayed_for_oplocks
1959 but it's handy to differentiate in debug messages
1960 between a 30 second delay due to oplock break, and
1961 a 1 second delay for share mode conflicts. */
1962
1963 state.delayed_for_oplocks = False;
1964 state.id = id;
1965
1966 if ((req != NULL)
1967 && !request_timed_out(request_time,
1968 timeout)) {
1969 defer_open(lck, request_time, timeout,
1970 req, &state);
1971 }
1972 }
1973
1974 TALLOC_FREE(lck);
1975 if (can_access) {
1976 /*
1977 * We have detected a sharing violation here
1978 * so return the correct error code
1979 */
1980 status = NT_STATUS_SHARING_VIOLATION;
1981 } else {
1982 status = NT_STATUS_ACCESS_DENIED;
1983 }
1984 return status;
1985 }
1986
1987 /*
1988 * We exit this block with the share entry *locked*.....
1989 */
1990 }
1991
1992 SMB_ASSERT(!file_existed || (lck != NULL));
1993
1994 /*
1995 * Ensure we pay attention to default ACLs on directories if required.
1996 */
1997
1998 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1999 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2000 unx_mode = 0777;
2001 }
2002
2003 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2004 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2005 (unsigned int)flags, (unsigned int)flags2,
2006 (unsigned int)unx_mode, (unsigned int)access_mask,
2007 (unsigned int)open_access_mask));
2008
2009 /*
2010 * open_file strips any O_TRUNC flags itself.
2011 */
2012
2013 fsp_open = open_file(fsp, conn, req, parent_dir,
2014 flags|flags2, unx_mode, access_mask,
2015 open_access_mask);
2016
2017 if (!NT_STATUS_IS_OK(fsp_open)) {
2018 if (lck != NULL) {
2019 TALLOC_FREE(lck);
2020 }
2021 return fsp_open;
2022 }
2023
2024 if (!file_existed) {
2025 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2026 /*
2027 * Deal with the race condition where two smbd's detect the
2028 * file doesn't exist and do the create at the same time. One
2029 * of them will win and set a share mode, the other (ie. this
2030 * one) should check if the requested share mode for this
2031 * create is allowed.
2032 */
2033
2034 /*
2035 * Now the file exists and fsp is successfully opened,
2036 * fsp->dev and fsp->inode are valid and should replace the
2037 * dev=0,inode=0 from a non existent file. Spotted by
2038 * Nadav Danieli <nadavd@exanet.com>. JRA.
2039 */
2040
2041 id = fsp->file_id;
2042
2043 lck = get_share_mode_lock(talloc_tos(), id,
2044 conn->connectpath,
2045 smb_fname, &old_write_time);
2046
2047 if (lck == NULL) {
2048 DEBUG(0, ("open_file_ntcreate: Could not get share "
2049 "mode lock for %s\n",
2050 smb_fname_str_dbg(smb_fname)));
2051 fd_close(fsp);
2052 return NT_STATUS_SHARING_VIOLATION;
2053 }
2054
2055 /* First pass - send break only on batch oplocks. */
2056 if ((req != NULL)
2057 && delay_for_oplocks(lck, fsp, req->mid, 1,
2058 oplock_request)) {
2059 schedule_defer_open(lck, request_time, req);
2060 TALLOC_FREE(lck);
2061 fd_close(fsp);
2062 return NT_STATUS_SHARING_VIOLATION;
2063 }
2064
2065 status = open_mode_check(conn, lck, access_mask, share_access,
2066 create_options, &file_existed);
2067
2068 if (NT_STATUS_IS_OK(status)) {
2069 /* We might be going to allow this open. Check oplock
2070 * status again. */
2071 /* Second pass - send break for both batch or
2072 * exclusive oplocks. */
2073 if ((req != NULL)
2074 && delay_for_oplocks(lck, fsp, req->mid, 2,
2075 oplock_request)) {
2076 schedule_defer_open(lck, request_time, req);
2077 TALLOC_FREE(lck);
2078 fd_close(fsp);
2079 return NT_STATUS_SHARING_VIOLATION;
2080 }
2081 }
2082
2083 if (!NT_STATUS_IS_OK(status)) {
2084 struct deferred_open_record state;
2085
2086 fd_close(fsp);
2087
2088 state.delayed_for_oplocks = False;
2089 state.id = id;
2090
2091 /* Do it all over again immediately. In the second
2092 * round we will find that the file existed and handle
2093 * the DELETE_PENDING and FCB cases correctly. No need
2094 * to duplicate the code here. Essentially this is a
2095 * "goto top of this function", but don't tell
2096 * anybody... */
2097
2098 if (req != NULL) {
2099 defer_open(lck, request_time, timeval_zero(),
2100 req, &state);
2101 }
2102 TALLOC_FREE(lck);
2103 return status;
2104 }
2105
2106 /*
2107 * We exit this block with the share entry *locked*.....
2108 */
2109
2110 }
2111
2112 SMB_ASSERT(lck != NULL);
2113
2114 /* Delete streams if create_disposition requires it */
2115 if (file_existed && clear_ads &&
2116 !is_ntfs_stream_smb_fname(smb_fname)) {
2117 status = delete_all_streams(conn, smb_fname->base_name);
2118 if (!NT_STATUS_IS_OK(status)) {
2119 TALLOC_FREE(lck);
2120 fd_close(fsp);
2121 return status;
2122 }
2123 }
2124
2125 /* note that we ignore failure for the following. It is
2126 basically a hack for NFS, and NFS will never set one of
2127 these only read them. Nobody but Samba can ever set a deny
2128 mode and we have already checked our more authoritative
2129 locking database for permission to set this deny mode. If
2130 the kernel refuses the operations then the kernel is wrong.
2131 note that GPFS supports it as well - jmcd */
2132
2133 if (fsp->fh->fd != -1) {
2134 int ret_flock;
2135 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2136 if(ret_flock == -1 ){
2137
2138 TALLOC_FREE(lck);
2139 fd_close(fsp);
2140
2141 return NT_STATUS_SHARING_VIOLATION;
2142 }
2143 }
2144
2145 /*
2146 * At this point onwards, we can guarentee that the share entry
2147 * is locked, whether we created the file or not, and that the
2148 * deny mode is compatible with all current opens.
2149 */
2150
2151 /*
2152 * If requested, truncate the file.
2153 */
2154
2155 if (file_existed && (flags2&O_TRUNC)) {
2156 /*
2157 * We are modifing the file after open - update the stat
2158 * struct..
2159 */
2160 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2161 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2162 status = map_nt_error_from_unix(errno);
2163 TALLOC_FREE(lck);
2164 fd_close(fsp);
2165 return status;
2166 }
2167 }
2168
2169 /*
2170 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2171 */
2172 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2173
2174 if (file_existed) {
2175 /* stat opens on existing files don't get oplocks. */
2176 if (is_stat_open(open_access_mask)) {
2177 fsp->oplock_type = NO_OPLOCK;
2178 }
2179
2180 if (!(flags2 & O_TRUNC)) {
2181 info = FILE_WAS_OPENED;
2182 } else {
2183 info = FILE_WAS_OVERWRITTEN;
2184 }
2185 } else {
2186 info = FILE_WAS_CREATED;
2187 }
2188
2189 if (pinfo) {
2190 *pinfo = info;
2191 }
2192
2193 /*
2194 * Setup the oplock info in both the shared memory and
2195 * file structs.
2196 */
2197
2198 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2199 /* Could not get the kernel oplock */
2200 fsp->oplock_type = NO_OPLOCK;
2201 }
2202
2203 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2204 new_file_created = True;
2205 }
2206
2207 set_share_mode(lck, fsp, get_current_uid(conn), 0,
2208 fsp->oplock_type);
2209
2210 /* Handle strange delete on close create semantics. */
2211 if (create_options & FILE_DELETE_ON_CLOSE) {
2212
2213 status = can_set_delete_on_close(fsp, new_dos_attributes);
2214
2215 if (!NT_STATUS_IS_OK(status)) {
2216 /* Remember to delete the mode we just added. */
2217 del_share_mode(lck, fsp);
2218 TALLOC_FREE(lck);
2219 fd_close(fsp);
2220 return status;
2221 }
2222 /* Note that here we set the *inital* delete on close flag,
2223 not the regular one. The magic gets handled in close. */
2224 fsp->initial_delete_on_close = True;
2225 }
2226
2227 if (new_file_created) {
2228 /* Files should be initially set as archive */
2229 if (lp_map_archive(SNUM(conn)) ||
2230 lp_store_dos_attributes(SNUM(conn))) {
2231 if (!posix_open) {
2232 if (file_set_dosmode(conn, smb_fname,
2233 new_dos_attributes | aARCH,
2234 parent_dir, true) == 0) {
2235 unx_mode = smb_fname->st.st_ex_mode;
2236 }
2237 }
2238 }
2239 }
2240
2241 /*
2242 * Take care of inherited ACLs on created files - if default ACL not
2243 * selected.
2244 */
2245
2246 if (!posix_open && !file_existed && !def_acl) {
2247
2248 int saved_errno = errno; /* We might get ENOSYS in the next
2249 * call.. */
2250
2251 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2252 errno == ENOSYS) {
2253 errno = saved_errno; /* Ignore ENOSYS */
2254 }
2255
2256 } else if (new_unx_mode) {
2257
2258 int ret = -1;
2259
2260 /* Attributes need changing. File already existed. */
2261
2262 {
2263 int saved_errno = errno; /* We might get ENOSYS in the
2264 * next call.. */
2265 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2266
2267 if (ret == -1 && errno == ENOSYS) {
2268 errno = saved_errno; /* Ignore ENOSYS */
2269 } else {
2270 DEBUG(5, ("open_file_ntcreate: reset "
2271 "attributes of file %s to 0%o\n",
2272 smb_fname_str_dbg(smb_fname),
2273 (unsigned int)new_unx_mode));
2274 ret = 0; /* Don't do the fchmod below. */
2275 }
2276 }
2277
2278 if ((ret == -1) &&
2279 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2280 DEBUG(5, ("open_file_ntcreate: failed to reset "
2281 "attributes of file %s to 0%o\n",
2282 smb_fname_str_dbg(smb_fname),
2283 (unsigned int)new_unx_mode));
2284 }
2285
2286 /* If this is a successful open, we must remove any deferred open
2287 * records. */
2288 if (req != NULL) {
2289 del_deferred_open_entry(lck, req->mid,
2290 sconn_server_id(req->sconn));
2291 }
2292 TALLOC_FREE(lck);
2293
2294 return NT_STATUS_OK;
2295 }
2296
2297
2298 /****************************************************************************
2299 Open a file for for write to ensure that we can fchmod it.
2300 ****************************************************************************/
2301
2302 NTSTATUS open_file_fchmod(struct smb_request *req, connection_struct *conn,
2303 struct smb_filename *smb_fname,
2304 files_struct **result)
2305 {
2306 files_struct *fsp = NULL;
2307 NTSTATUS status;
2308
2309 if (!VALID_STAT(smb_fname->st)) {
2310 return NT_STATUS_INVALID_PARAMETER;
2311 }
2312
2313 status = file_new(req, conn, &fsp);
2314 if(!NT_STATUS_IS_OK(status)) {
2315 return status;
2316 }
2317
2318 status = SMB_VFS_CREATE_FILE(
2319 conn, /* conn */
2320 NULL, /* req */
2321 0, /* root_dir_fid */
2322 smb_fname, /* fname */
2323 FILE_WRITE_DATA, /* access_mask */
2324 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2325 FILE_SHARE_DELETE),
2326 FILE_OPEN, /* create_disposition*/
2327 0, /* create_options */
2328 0, /* file_attributes */
2329 0, /* oplock_request */
2330 0, /* allocation_size */
2331 0, /* private_flags */
2332 NULL, /* sd */
2333 NULL, /* ea_list */
2334 &fsp, /* result */
2335 NULL); /* pinfo */
2336
2337 /*
2338 * This is not a user visible file open.
2339 * Don't set a share mode.
2340 */
2341
2342 if (!NT_STATUS_IS_OK(status)) {
2343 file_free(req, fsp);
2344 return status;
2345 }
2346
2347 *result = fsp;
2348 return NT_STATUS_OK;
2349 }
2350
2351 /****************************************************************************
2352 Close the fchmod file fd - ensure no locks are lost.
2353 ****************************************************************************/
2354
2355 NTSTATUS close_file_fchmod(struct smb_request *req, files_struct *fsp)
2356 {
2357 NTSTATUS status = fd_close(fsp);
2358 file_free(req, fsp);
2359 return status;
2360 }
2361
2362 static NTSTATUS mkdir_internal(connection_struct *conn,
2363 struct smb_filename *smb_dname,
2364 uint32 file_attributes)
2365 {
2366 mode_t mode;
2367 char *parent_dir;
2368 NTSTATUS status;
2369 bool posix_open = false;
2370
2371 if(!CAN_WRITE(conn)) {
2372 DEBUG(5,("mkdir_internal: failing create on read-only share "
2373 "%s\n", lp_servicename(SNUM(conn))));
2374 return NT_STATUS_ACCESS_DENIED;
2375 }
2376
2377 status = check_name(conn, smb_dname->base_name);
2378 if (!NT_STATUS_IS_OK(status)) {
2379 return status;
2380 }
2381
2382 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2383 NULL)) {
2384 return NT_STATUS_NO_MEMORY;
2385 }
2386
2387 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2388 posix_open = true;
2389 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2390 } else {
2391 mode = unix_mode(conn, aDIR, smb_dname, parent_dir);
2392 }
2393
2394 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2395 return map_nt_error_from_unix(errno);
2396 }
2397
2398 /* Ensure we're checking for a symlink here.... */
2399 /* We don't want to get caught by a symlink racer. */
2400
2401 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2402 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2403 smb_fname_str_dbg(smb_dname), strerror(errno)));
2404 return map_nt_error_from_unix(errno);
2405 }
2406
2407 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2408 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2409 smb_fname_str_dbg(smb_dname)));
2410 return NT_STATUS_ACCESS_DENIED;
2411 }
2412
2413 if (lp_store_dos_attributes(SNUM(conn))) {
2414 if (!posix_open) {
2415 file_set_dosmode(conn, smb_dname,
2416 file_attributes | aDIR,
2417 parent_dir, true);
2418 }
2419 }
2420
2421 if (lp_inherit_perms(SNUM(conn))) {
2422 inherit_access_posix_acl(conn, parent_dir,
2423 smb_dname->base_name, mode);
2424 }
2425
2426 if (!posix_open) {
2427 /*
2428 * Check if high bits should have been set,
2429 * then (if bits are missing): add them.
2430 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2431 * dir.
2432 */
2433 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2434 (mode & ~smb_dname->st.st_ex_mode)) {
2435 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2436 (smb_dname->st.st_ex_mode |
2437 (mode & ~smb_dname->st.st_ex_mode)));
2438 }
2439 }
2440
2441 /* Change the owner if required. */
2442 if (lp_inherit_owner(SNUM(conn))) {
2443 change_dir_owner_to_parent(conn, parent_dir,
2444 smb_dname->base_name,
2445 &smb_dname->st);
2446 }
2447
2448 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2449 smb_dname->base_name);
2450
2451 return NT_STATUS_OK;
2452 }
2453
2454 /****************************************************************************
2455 Open a directory from an NT SMB call.
2456 ****************************************************************************/
2457
2458 static NTSTATUS open_directory(connection_struct *conn,
2459 struct smb_request *req,
2460 struct smb_filename *smb_dname,
2461 uint32 access_mask,
2462 uint32 share_access,
2463 uint32 create_disposition,
2464 uint32 create_options,
2465 uint32 file_attributes,
2466 int *pinfo,
2467 files_struct **result)
2468 {
2469 files_struct *fsp = NULL;
2470 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2471 struct share_mode_lock *lck = NULL;
2472 NTSTATUS status;
2473 struct timespec mtimespec;
2474 int info = 0;
2475
2476 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2477
2478 /* Ensure we have a directory attribute. */
2479 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2480
2481 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2482 "share_access = 0x%x create_options = 0x%x, "
2483 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2484 smb_fname_str_dbg(smb_dname),
2485 (unsigned int)access_mask,
2486 (unsigned int)share_access,
2487 (unsigned int)create_options,
2488 (unsigned int)create_disposition,
2489 (unsigned int)file_attributes));
2490
2491 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2492 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2493 is_ntfs_stream_smb_fname(smb_dname)) {
2494 DEBUG(2, ("open_directory: %s is a stream name!\n",
2495 smb_fname_str_dbg(smb_dname)));
2496 return NT_STATUS_NOT_A_DIRECTORY;
2497 }
2498
2499 status = calculate_access_mask(conn, smb_dname, dir_existed,
2500 access_mask, &access_mask);
2501 if (!NT_STATUS_IS_OK(status)) {
2502 DEBUG(10, ("open_directory: calculate_access_mask "
2503 "on file %s returned %s\n",
2504 smb_fname_str_dbg(smb_dname),
2505 nt_errstr(status)));
2506 return status;
2507 }
2508
2509 /* We need to support SeSecurityPrivilege for this. */
2510 if (access_mask & SEC_FLAG_SYSTEM_SECURITY) {
2511 DEBUG(10, ("open_directory: open on %s "
2512 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2513 smb_fname_str_dbg(smb_dname)));
2514 return NT_STATUS_PRIVILEGE_NOT_HELD;
2515 }
2516
2517 switch( create_disposition ) {
2518 case FILE_OPEN:
2519
2520 info = FILE_WAS_OPENED;
2521
2522 /*
2523 * We want to follow symlinks here.
2524 */
2525
2526 if (SMB_VFS_STAT(conn, smb_dname) != 0) {
2527 return map_nt_error_from_unix(errno);
2528 }
2529
2530 break;
2531
2532 case FILE_CREATE:
2533
2534 /* If directory exists error. If directory doesn't
2535 * exist create. */
2536
2537 status = mkdir_internal(conn, smb_dname,
2538 file_attributes);
2539
2540 if (!NT_STATUS_IS_OK(status)) {
2541 DEBUG(2, ("open_directory: unable to create "
2542 "%s. Error was %s\n",
2543 smb_fname_str_dbg(smb_dname),
2544 nt_errstr(status)));
2545 return status;
2546 }
2547
2548 info = FILE_WAS_CREATED;
2549 break;
2550
2551 case FILE_OPEN_IF:
2552 /*
2553 * If directory exists open. If directory doesn't
2554 * exist create.
2555 */
2556
2557 status = mkdir_internal(conn, smb_dname,
2558 file_attributes);
2559
2560 if (NT_STATUS_IS_OK(status)) {
2561 info = FILE_WAS_CREATED;
2562 }
2563
2564 if (NT_STATUS_EQUAL(status,
2565 NT_STATUS_OBJECT_NAME_COLLISION)) {
2566 info = FILE_WAS_OPENED;
2567 status = NT_STATUS_OK;
2568 }
2569
2570 break;
2571
2572 case FILE_SUPERSEDE:
2573 case FILE_OVERWRITE:
2574 case FILE_OVERWRITE_IF:
2575 default:
2576 DEBUG(5,("open_directory: invalid create_disposition "
2577 "0x%x for directory %s\n",
2578 (unsigned int)create_disposition,
2579 smb_fname_str_dbg(smb_dname)));
2580 return NT_STATUS_INVALID_PARAMETER;
2581 }
2582
2583 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2584 DEBUG(5,("open_directory: %s is not a directory !\n",
2585 smb_fname_str_dbg(smb_dname)));
2586 return NT_STATUS_NOT_A_DIRECTORY;
2587 }
2588
2589 if (info == FILE_WAS_OPENED) {
2590 uint32_t access_granted = 0;
2591 status = smbd_check_open_rights(conn, smb_dname, access_mask,
2592 &access_granted);
2593
2594 /* Were we trying to do a directory open
2595 * for delete and didn't get DELETE
2596 * access (only) ? Check if the
2597 * directory allows DELETE_CHILD.
2598 * See here:
2599 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
2600 * for details. */
2601
2602 if ((NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
2603 (access_mask & DELETE_ACCESS) &&
2604 (access_granted == DELETE_ACCESS) &&
2605 can_delete_file_in_directory(conn, smb_dname))) {
2606 DEBUG(10,("open_directory: overrode ACCESS_DENIED "
2607 "on directory %s\n",
2608 smb_fname_str_dbg(smb_dname)));
2609 status = NT_STATUS_OK;
2610 }
2611
2612 if (!NT_STATUS_IS_OK(status)) {
2613 DEBUG(10, ("open_directory: smbd_check_open_rights on "
2614 "file %s failed with %s\n",
2615 smb_fname_str_dbg(smb_dname),
2616 nt_errstr(status)));
2617 return status;
2618 }
2619 }
2620
2621 status = file_new(req, conn, &fsp);
2622 if(!NT_STATUS_IS_OK(status)) {
2623 return status;
2624 }
2625
2626 /*
2627 * Setup the files_struct for it.
2628 */
2629
2630 fsp->mode = smb_dname->st.st_ex_mode;
2631 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2632 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2633 fsp->file_pid = req ? req->smbpid : 0;
2634 fsp->can_lock = False;
2635 fsp->can_read = False;
2636 fsp->can_write = False;
2637
2638 fsp->share_access = share_access;
2639 fsp->fh->private_options = 0;
2640 /*
2641 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2642 */
2643 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2644 fsp->print_file = NULL;
2645 fsp->modified = False;
2646 fsp->oplock_type = NO_OPLOCK;
2647 fsp->sent_oplock_break = NO_BREAK_SENT;
2648 fsp->is_directory = True;
2649 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2650 status = fsp_set_smb_fname(fsp, smb_dname);
2651 if (!NT_STATUS_IS_OK(status)) {
2652 return status;
2653 }
2654
2655 mtimespec = smb_dname->st.st_ex_mtime;
2656
2657 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2658 conn->connectpath, smb_dname, &mtimespec);
2659
2660 if (lck == NULL) {
2661 DEBUG(0, ("open_directory: Could not get share mode lock for "
2662 "%s\n", smb_fname_str_dbg(smb_dname)));
2663 file_free(req, fsp);
2664 return NT_STATUS_SHARING_VIOLATION;
2665 }
2666
2667 status = open_mode_check(conn, lck, access_mask, share_access,
2668 create_options, &dir_existed);
2669
2670 if (!NT_STATUS_IS_OK(status)) {
2671 TALLOC_FREE(lck);
2672 file_free(req, fsp);
2673 return status;
2674 }
2675
2676 set_share_mode(lck, fsp, get_current_uid(conn), 0, NO_OPLOCK);
2677
2678 /* For directories the delete on close bit at open time seems
2679 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2680 if (create_options & FILE_DELETE_ON_CLOSE) {
2681 status = can_set_delete_on_close(fsp, 0);
2682 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2683 TALLOC_FREE(lck);
2684 file_free(req, fsp);
2685 return status;
2686 }
2687
2688 if (NT_STATUS_IS_OK(status)) {
2689 /* Note that here we set the *inital* delete on close flag,
2690 not the regular one. The magic gets handled in close. */
2691 fsp->initial_delete_on_close = True;
2692 }
2693 }
2694
2695 TALLOC_FREE(lck);
2696
2697 if (pinfo) {
2698 *pinfo = info;
2699 }
2700
2701 *result = fsp;
2702 return NT_STATUS_OK;
2703 }
2704
2705 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2706 struct smb_filename *smb_dname)
2707 {
2708 NTSTATUS status;
2709 files_struct *fsp;
2710
2711 status = SMB_VFS_CREATE_FILE(
2712 conn, /* conn */
2713 req, /* req */
2714 0, /* root_dir_fid */
2715 smb_dname, /* fname */
2716 FILE_READ_ATTRIBUTES, /* access_mask */
2717 FILE_SHARE_NONE, /* share_access */
2718 FILE_CREATE, /* create_disposition*/
2719 FILE_DIRECTORY_FILE, /* create_options */
2720 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2721 0, /* oplock_request */
2722 0, /* allocation_size */
2723 0, /* private_flags */
2724 NULL, /* sd */
2725 NULL, /* ea_list */
2726 &fsp, /* result */
2727 NULL); /* pinfo */
2728
2729 if (NT_STATUS_IS_OK(status)) {
2730 close_file(req, fsp, NORMAL_CLOSE);
2731 }
2732
2733 return status;
2734 }
2735
2736 /****************************************************************************
2737 Receive notification that one of our open files has been renamed by another
2738 smbd process.
2739 ****************************************************************************/
2740
2741 void msg_file_was_renamed(struct messaging_context *msg,
2742 void *private_data,
2743 uint32_t msg_type,
2744 struct server_id server_id,
2745 DATA_BLOB *data)
2746 {
2747 struct smbd_server_connection *sconn;
2748 files_struct *fsp;
2749 char *frm = (char *)data->data;
2750 struct file_id id;
2751 const char *sharepath;
2752 const char *base_name;
2753 const char *stream_name;
2754 struct smb_filename *smb_fname = NULL;
2755 size_t sp_len, bn_len;
2756 NTSTATUS status;
2757
2758 sconn = msg_ctx_to_sconn(msg);
2759 if (sconn == NULL) {
2760 DEBUG(1, ("could not find sconn\n"));
2761 return;
2762 }
2763
2764 if (data->data == NULL
2765 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2766 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2767 (int)data->length));
2768 return;
2769 }
2770
2771 /* Unpack the message. */
2772 pull_file_id_24(frm, &id);
2773 sharepath = &frm[24];
2774 sp_len = strlen(sharepath);
2775 base_name = sharepath + sp_len + 1;
2776 bn_len = strlen(base_name);
2777 stream_name = sharepath + sp_len + 1 + bn_len + 1;
2778
2779 /* stream_name must always be NULL if there is no stream. */
2780 if (stream_name[0] == '\0') {
2781 stream_name = NULL;
2782 }
2783
2784 status = create_synthetic_smb_fname(talloc_tos(), base_name,
2785 stream_name, NULL, &smb_fname);
2786 if (!NT_STATUS_IS_OK(status)) {
2787 return;
2788 }
2789
2790 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2791 "file_id %s\n",
2792 sharepath, smb_fname_str_dbg(smb_fname),
2793 file_id_string_tos(&id)));
2794
2795 for(fsp = file_find_di_first(sconn, id); fsp;
2796 fsp = file_find_di_next(fsp)) {
2797 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2798
2799 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2800 fsp->fnum, fsp_str_dbg(fsp),
2801 smb_fname_str_dbg(smb_fname)));
2802 status = fsp_set_smb_fname(fsp, smb_fname);
2803 if (!NT_STATUS_IS_OK(status)) {
2804 goto out;
2805 }
2806 } else {
2807 /* TODO. JRA. */
2808 /* Now we have the complete path we can work out if this is
2809 actually within this share and adjust newname accordingly. */
2810 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2811 "not sharepath %s) "
2812 "fnum %d from %s -> %s\n",
2813 fsp->conn->connectpath,
2814 sharepath,
2815 fsp->fnum,
2816 fsp_str_dbg(fsp),
2817 smb_fname_str_dbg(smb_fname)));
2818 }
2819 }
2820 out:
2821 TALLOC_FREE(smb_fname);
2822 return;
2823 }
2824
2825 /*
2826 * If a main file is opened for delete, all streams need to be checked for
2827 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2828 * If that works, delete them all by setting the delete on close and close.
2829 */
2830
2831 NTSTATUS open_streams_for_delete(connection_struct *conn,
2832 const char *fname)
2833 {
2834 struct stream_struct *stream_info;
2835 files_struct **streams;
2836 int i;
2837 unsigned int num_streams;
2838 TALLOC_CTX *frame = talloc_stackframe();
2839 NTSTATUS status;
2840
2841 status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
2842 &num_streams, &stream_info);
2843
2844 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2845 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2846 DEBUG(10, ("no streams around\n"));
2847 TALLOC_FREE(frame);
2848 return NT_STATUS_OK;
2849 }
2850
2851 if (!NT_STATUS_IS_OK(status)) {
2852 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
2853 nt_errstr(status)));
2854 goto fail;
2855 }
2856
2857 DEBUG(10, ("open_streams_for_delete found %d streams\n",
2858 num_streams));
2859
2860 if (num_streams == 0) {
2861 TALLOC_FREE(frame);
2862 return NT_STATUS_OK;
2863 }
2864
2865 streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
2866 if (streams == NULL) {
2867 DEBUG(0, ("talloc failed\n"));
2868 status = NT_STATUS_NO_MEMORY;
2869 goto fail;
2870 }
2871
2872 for (i=0; i<num_streams; i++) {
2873 struct smb_filename *smb_fname = NULL;
2874
2875 if (strequal(stream_info[i].name, "::$DATA")) {
2876 streams[i] = NULL;
2877 continue;
2878 }
2879
2880 status = create_synthetic_smb_fname(talloc_tos(), fname,
2881 stream_info[i].name,
2882 NULL, &smb_fname);
2883 if (!NT_STATUS_IS_OK(status)) {
2884 goto fail;
2885 }
2886
2887 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
2888 DEBUG(10, ("Unable to stat stream: %s\n",
2889 smb_fname_str_dbg(smb_fname)));
2890 }
2891
2892 status = SMB_VFS_CREATE_FILE(
2893 conn, /* conn */
2894 NULL, /* req */
2895 0, /* root_dir_fid */
2896 smb_fname, /* fname */
2897 DELETE_ACCESS, /* access_mask */
2898 (FILE_SHARE_READ | /* share_access */
2899 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
2900 FILE_OPEN, /* create_disposition*/
2901 0, /* create_options */
2902 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
2903 0, /* oplock_request */
2904 0, /* allocation_size */
2905 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
2906 NULL, /* sd */
2907 NULL, /* ea_list */
2908 &streams[i], /* result */
2909 NULL); /* pinfo */
2910
2911 if (!NT_STATUS_IS_OK(status)) {
2912 DEBUG(10, ("Could not open stream %s: %s\n",
2913 smb_fname_str_dbg(smb_fname),
2914 nt_errstr(status)));
2915
2916 TALLOC_FREE(smb_fname);
2917 break;
2918 }
2919 TALLOC_FREE(smb_fname);
2920 }
2921
2922 /*
2923 * don't touch the variable "status" beyond this point :-)
2924 */
2925
2926 for (i -= 1 ; i >= 0; i--) {
2927 if (streams[i] == NULL) {
2928 continue;
2929 }
2930
2931 DEBUG(10, ("Closing stream # %d, %s\n", i,
2932 fsp_str_dbg(streams[i])));
2933 close_file(NULL, streams[i], NORMAL_CLOSE);
2934 }
2935
2936 fail:
2937 TALLOC_FREE(frame);
2938 return status;
2939 }
2940
2941 /*
2942 * Wrapper around open_file_ntcreate and open_directory
2943 */
2944
2945 static NTSTATUS create_file_unixpath(connection_struct *conn,
2946 struct smb_request *req,
2947 struct smb_filename *smb_fname,
2948 uint32_t access_mask,
2949 uint32_t share_access,
2950 uint32_t create_disposition,
2951 uint32_t create_options,
2952 uint32_t file_attributes,
2953 uint32_t oplock_request,
2954 uint64_t allocation_size,
2955 uint32_t private_flags,
2956 struct security_descriptor *sd,
2957 struct ea_list *ea_list,
2958
2959 files_struct **result,
2960 int *pinfo)
2961 {
2962 int info = FILE_WAS_OPENED;
2963 files_struct *base_fsp = NULL;
2964 files_struct *fsp = NULL;
2965 NTSTATUS status;
2966
2967 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
2968 "file_attributes = 0x%x, share_access = 0x%x, "
2969 "create_disposition = 0x%x create_options = 0x%x "
2970 "oplock_request = 0x%x private_flags = 0x%x "
2971 "ea_list = 0x%p, sd = 0x%p, "
2972 "fname = %s\n",
2973 (unsigned int)access_mask,
2974 (unsigned int)file_attributes,
2975 (unsigned int)share_access,
2976 (unsigned int)create_disposition,
2977 (unsigned int)create_options,
2978 (unsigned int)oplock_request,
2979 (unsigned int)private_flags,
2980 ea_list, sd, smb_fname_str_dbg(smb_fname)));
2981
2982 if (create_options & FILE_OPEN_BY_FILE_ID) {
2983 status = NT_STATUS_NOT_SUPPORTED;
2984 goto fail;
2985 }
2986
2987 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
2988 status = NT_STATUS_INVALID_PARAMETER;
2989 goto fail;
2990 }
2991
2992 if (req == NULL) {
2993 oplock_request |= INTERNAL_OPEN_ONLY;
2994 }
2995
2996 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2997 && (access_mask & DELETE_ACCESS)
2998 && !is_ntfs_stream_smb_fname(smb_fname)) {
2999 /*
3000 * We can't open a file with DELETE access if any of the
3001 * streams is open without FILE_SHARE_DELETE
3002 */
3003 status = open_streams_for_delete(conn, smb_fname->base_name);
3004
3005 if (!NT_STATUS_IS_OK(status)) {
3006 goto fail;
3007 }
3008 }
3009
3010 /* This is the correct thing to do (check every time) but can_delete
3011 * is expensive (it may have to read the parent directory
3012 * permissions). So for now we're not doing it unless we have a strong
3013 * hint the client is really going to delete this file. If the client
3014 * is forcing FILE_CREATE let the filesystem take care of the
3015 * permissions. */
3016
3017 /* Setting FILE_SHARE_DELETE is the hint. */
3018
3019 if (lp_acl_check_permissions(SNUM(conn))
3020 && (create_disposition != FILE_CREATE)
3021 && (share_access & FILE_SHARE_DELETE)
3022 && (access_mask & DELETE_ACCESS)
3023 && (!(can_delete_file_in_directory(conn, smb_fname) ||
3024 can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
3025 status = NT_STATUS_ACCESS_DENIED;
3026 DEBUG(10,("create_file_unixpath: open file %s "
3027 "for delete ACCESS_DENIED\n",
3028 smb_fname_str_dbg(smb_fname)));
3029 goto fail;
3030 }
3031
3032 #if 0
3033 /* We need to support SeSecurityPrivilege for this. */
3034 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3035 !user_has_privileges(current_user.nt_user_token,
3036 &se_security)) {
3037 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3038 goto fail;
3039 }
3040 #else
3041 /* We need to support SeSecurityPrivilege for this. */
3042 if (access_mask & SEC_FLAG_SYSTEM_SECURITY) {
3043 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3044 goto fail;
3045 }
3046 /* Don't allow a SACL set from an NTtrans create until we
3047 * support SeSecurityPrivilege. */
3048 if (!VALID_STAT(smb_fname->st) &&
3049 lp_nt_acl_support(SNUM(conn)) &&
3050 sd && (sd->sacl != NULL)) {
3051 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3052 goto fail;
3053 }
3054 #endif
3055
3056 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3057 && is_ntfs_stream_smb_fname(smb_fname)
3058 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3059 uint32 base_create_disposition;
3060 struct smb_filename *smb_fname_base = NULL;
3061
3062 if (create_options & FILE_DIRECTORY_FILE) {
3063 status = NT_STATUS_NOT_A_DIRECTORY;
3064 goto fail;
3065 }
3066
3067 switch (create_disposition) {
3068 case FILE_OPEN:
3069 base_create_disposition = FILE_OPEN;
3070 break;
3071 default:
3072 base_create_disposition = FILE_OPEN_IF;
3073 break;
3074 }
3075
3076 /* Create an smb_filename with stream_name == NULL. */
3077 status = create_synthetic_smb_fname(talloc_tos(),
3078 smb_fname->base_name,
3079 NULL, NULL,
3080 &smb_fname_base);
3081 if (!NT_STATUS_IS_OK(status)) {
3082 goto fail;
3083 }
3084
3085 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3086 DEBUG(10, ("Unable to stat stream: %s\n",
3087 smb_fname_str_dbg(smb_fname_base)));
3088 }
3089
3090 /* Open the base file. */
3091 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3092 FILE_SHARE_READ
3093 | FILE_SHARE_WRITE
3094 | FILE_SHARE_DELETE,
3095 base_create_disposition,
3096 0, 0, 0, 0, 0, NULL, NULL,
3097 &base_fsp, NULL);
3098 TALLOC_FREE(smb_fname_base);
3099
3100 if (!NT_STATUS_IS_OK(status)) {
3101 DEBUG(10, ("create_file_unixpath for base %s failed: "
3102 "%s\n", smb_fname->base_name,
3103 nt_errstr(status)));
3104 goto fail;
3105 }
3106 /* we don't need to low level fd */
3107 fd_close(base_fsp);
3108 }
3109
3110 /*
3111 * If it's a request for a directory open, deal with it separately.
3112 */
3113
3114 if (create_options & FILE_DIRECTORY_FILE) {
3115
3116 if (create_options & FILE_NON_DIRECTORY_FILE) {
3117 status = NT_STATUS_INVALID_PARAMETER;
3118 goto fail;
3119 }
3120
3121 /* Can't open a temp directory. IFS kit test. */
3122 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3123 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3124 status = NT_STATUS_INVALID_PARAMETER;
3125 goto fail;
3126 }
3127
3128 /*
3129 * We will get a create directory here if the Win32
3130 * app specified a security descriptor in the
3131 * CreateDirectory() call.
3132 */
3133
3134 oplock_request = 0;
3135 status = open_directory(
3136 conn, req, smb_fname, access_mask, share_access,
3137 create_disposition, create_options, file_attributes,
3138 &info, &fsp);
3139 } else {
3140
3141 /*
3142 * Ordinary file case.
3143 */
3144
3145 status = file_new(req, conn, &fsp);
3146 if(!NT_STATUS_IS_OK(status)) {
3147 goto fail;
3148 }
3149
3150 status = fsp_set_smb_fname(fsp, smb_fname);
3151 if (!NT_STATUS_IS_OK(status)) {
3152 goto fail;
3153 }
3154
3155 /*
3156 * We're opening the stream element of a base_fsp
3157 * we already opened. Set up the base_fsp pointer.
3158 */
3159 if (base_fsp) {
3160 fsp->base_fsp = base_fsp;
3161 }
3162
3163 status = open_file_ntcreate(conn,
3164 req,
3165 access_mask,
3166 share_access,
3167 create_disposition,
3168 create_options,
3169 file_attributes,
3170 oplock_request,
3171 private_flags,
3172 &info,
3173 fsp);
3174
3175 if(!NT_STATUS_IS_OK(status)) {
3176 file_free(req, fsp);
3177 fsp = NULL;
3178 }
3179
3180 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3181
3182 /* A stream open never opens a directory */
3183
3184 if (base_fsp) {
3185 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3186 goto fail;
3187 }
3188
3189 /*
3190 * Fail the open if it was explicitly a non-directory
3191 * file.
3192 */
3193
3194 if (create_options & FILE_NON_DIRECTORY_FILE) {
3195 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3196 goto fail;
3197 }
3198
3199 oplock_request = 0;
3200 status = open_directory(
3201 conn, req, smb_fname, access_mask,
3202 share_access, create_disposition,
3203 create_options, file_attributes,
3204 &info, &fsp);
3205 }
3206 }
3207
3208 if (!NT_STATUS_IS_OK(status)) {
3209 goto fail;
3210 }
3211
3212 fsp->base_fsp = base_fsp;
3213
3214 /*
3215 * According to the MS documentation, the only time the security
3216 * descriptor is applied to the opened file is iff we *created* the
3217 * file; an existing file stays the same.
3218 *
3219 * Also, it seems (from observation) that you can open the file with
3220 * any access mask but you can still write the sd. We need to override
3221 * the granted access before we call set_sd
3222 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3223 */
3224
3225 if ((sd != NULL) && (info == FILE_WAS_CREATED)
3226 && lp_nt_acl_support(SNUM(conn))) {
3227
3228 uint32_t sec_info_sent;
3229 uint32_t saved_access_mask = fsp->access_mask;
3230
3231 sec_info_sent = get_sec_info(sd);
3232
3233 fsp->access_mask = FILE_GENERIC_ALL;
3234
3235 /* Convert all the generic bits. */
3236 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3237 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3238
3239 if (sec_info_sent & (SECINFO_OWNER|
3240 SECINFO_GROUP|
3241 SECINFO_DACL|
3242 SECINFO_SACL)) {
3243 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3244 }
3245
3246 fsp->access_mask = saved_access_mask;
3247
3248 if (!NT_STATUS_IS_OK(status)) {
3249 goto fail;
3250 }
3251 }
3252
3253 if ((ea_list != NULL) &&
3254 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3255 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3256 if (!NT_STATUS_IS_OK(status)) {
3257 goto fail;
3258 }
3259 }
3260
3261 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3262 status = NT_STATUS_ACCESS_DENIED;
3263 goto fail;
3264 }
3265
3266 /* Save the requested allocation size. */
3267 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3268 if (allocation_size
3269 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3270 fsp->initial_allocation_size = smb_roundup(
3271 fsp->conn, allocation_size);
3272 if (fsp->is_directory) {
3273 /* Can't set allocation size on a directory. */
3274 status = NT_STATUS_ACCESS_DENIED;
3275 goto fail;
3276 }
3277 if (vfs_allocate_file_space(
3278 fsp, fsp->initial_allocation_size) == -1) {
3279 status = NT_STATUS_DISK_FULL;
3280 goto fail;
3281 }
3282 } else {
3283 fsp->initial_allocation_size = smb_roundup(
3284 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3285 }
3286 }
3287
3288 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3289
3290 *result = fsp;
3291 if (pinfo != NULL) {
3292 *pinfo = info;
3293 }
3294
3295 smb_fname->st = fsp->fsp_name->st;
3296
3297 return NT_STATUS_OK;
3298
3299 fail:
3300 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3301
3302 if (fsp != NULL) {
3303 if (base_fsp && fsp->base_fsp == base_fsp) {
3304 /*
3305 * The close_file below will close
3306 * fsp->base_fsp.
3307 */
3308 base_fsp = NULL;
3309 }
3310 close_file(req, fsp, ERROR_CLOSE);
3311 fsp = NULL;
3312 }
3313 if (base_fsp != NULL) {
3314 close_file(req, base_fsp, ERROR_CLOSE);
3315 base_fsp = NULL;
3316 }
3317 return status;
3318 }
3319
3320 /*
3321 * Calculate the full path name given a relative fid.
3322 */
3323 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3324 struct smb_request *req,
3325 uint16_t root_dir_fid,
3326 struct smb_filename *smb_fname)
3327 {
3328 files_struct *dir_fsp;
3329 char *parent_fname = NULL;
3330 char *new_base_name = NULL;
3331 NTSTATUS status;
3332
3333 if (root_dir_fid == 0 || !smb_fname) {
3334 status = NT_STATUS_INTERNAL_ERROR;
3335 goto out;
3336 }
3337
3338 dir_fsp = file_fsp(req, root_dir_fid);
3339
3340 if (dir_fsp == NULL) {
3341 status = NT_STATUS_INVALID_HANDLE;
3342 goto out;
3343 }
3344
3345 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3346 status = NT_STATUS_INVALID_HANDLE;
3347 goto out;
3348 }
3349
3350 if (!dir_fsp->is_directory) {
3351
3352 /*
3353 * Check to see if this is a mac fork of some kind.
3354 */
3355
3356 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3357 is_ntfs_stream_smb_fname(smb_fname)) {
3358 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3359 goto out;
3360 }
3361
3362 /*
3363 we need to handle the case when we get a
3364 relative open relative to a file and the
3365 pathname is blank - this is a reopen!
3366 (hint from demyn plantenberg)
3367 */
3368
3369 status = NT_STATUS_INVALID_HANDLE;
3370 goto out;
3371 }
3372
3373 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3374 /*
3375 * We're at the toplevel dir, the final file name
3376 * must not contain ./, as this is filtered out
3377 * normally by srvstr_get_path and unix_convert
3378 * explicitly rejects paths containing ./.
3379 */
3380 parent_fname = talloc_strdup(talloc_tos(), "");
3381 if (parent_fname == NULL) {
3382 status = NT_STATUS_NO_MEMORY;
3383 goto out;
3384 }
3385 } else {
3386 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3387
3388 /*
3389 * Copy in the base directory name.
3390 */
3391
3392 parent_fname = TALLOC_ARRAY(talloc_tos(), char,
3393 dir_name_len+2);
3394 if (parent_fname == NULL) {
3395 status = NT_STATUS_NO_MEMORY;
3396 goto out;
3397 }
3398 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3399 dir_name_len+1);
3400
3401 /*
3402 * Ensure it ends in a '/'.
3403 * We used TALLOC_SIZE +2 to add space for the '/'.
3404 */
3405
3406 if(dir_name_len
3407 && (parent_fname[dir_name_len-1] != '\\')
3408 && (parent_fname[dir_name_len-1] != '/')) {
3409 parent_fname[dir_name_len] = '/';
3410 parent_fname[dir_name_len+1] = '\0';
3411 }
3412 }
3413
3414 new_base_name = talloc_asprintf(smb_fname, "%s%s", parent_fname,
3415 smb_fname->base_name);
3416 if (new_base_name == NULL) {
3417 status = NT_STATUS_NO_MEMORY;
3418 goto out;
3419 }
3420
3421 TALLOC_FREE(smb_fname->base_name);
3422 smb_fname->base_name = new_base_name;
3423 status = NT_STATUS_OK;
3424
3425 out:
3426 TALLOC_FREE(parent_fname);
3427 return status;
3428 }
3429
3430 NTSTATUS create_file_default(connection_struct *conn,
3431 struct smb_request *req,
3432 uint16_t root_dir_fid,
3433 struct smb_filename *smb_fname,
3434 uint32_t access_mask,
3435 uint32_t share_access,
3436 uint32_t create_disposition,
3437 uint32_t create_options,
3438 uint32_t file_attributes,
3439 uint32_t oplock_request,
3440 uint64_t allocation_size,
3441 uint32_t private_flags,
3442 struct security_descriptor *sd,
3443 struct ea_list *ea_list,
3444 files_struct **result,
3445 int *pinfo)
3446 {
3447 int info = FILE_WAS_OPENED;
3448 files_struct *fsp = NULL;
3449 NTSTATUS status;
3450 bool stream_name = false;
3451
3452 DEBUG(10,("create_file: access_mask = 0x%x "
3453 "file_attributes = 0x%x, share_access = 0x%x, "
3454 "create_disposition = 0x%x create_options = 0x%x "
3455 "oplock_request = 0x%x "
3456 "private_flags = 0x%x "
3457 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3458 "fname = %s\n",
3459 (unsigned int)access_mask,
3460 (unsigned int)file_attributes,
3461 (unsigned int)share_access,
3462 (unsigned int)create_disposition,
3463 (unsigned int)create_options,
3464 (unsigned int)oplock_request,
3465 (unsigned int)private_flags,
3466 (unsigned int)root_dir_fid,
3467 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3468
3469 /*
3470 * Calculate the filename from the root_dir_if if necessary.
3471 */
3472
3473 if (root_dir_fid != 0) {
3474 status = get_relative_fid_filename(conn, req, root_dir_fid,
3475 smb_fname);
3476 if (!NT_STATUS_IS_OK(status)) {
3477 goto fail;
3478 }
3479 }
3480
3481 /*
3482 * Check to see if this is a mac fork of some kind.
3483 */
3484
3485 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3486 if (stream_name) {
3487 enum FAKE_FILE_TYPE fake_file_type;
3488
3489 fake_file_type = is_fake_file(smb_fname);
3490
3491 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3492
3493 /*
3494 * Here we go! support for changing the disk quotas
3495 * --metze
3496 *
3497 * We need to fake up to open this MAGIC QUOTA file
3498 * and return a valid FID.
3499 *
3500 * w2k close this file directly after openening xp
3501 * also tries a QUERY_FILE_INFO on the file and then
3502 * close it
3503 */
3504 status = open_fake_file(req, conn, req->vuid,
3505 fake_file_type, smb_fname,
3506 access_mask, &fsp);
3507 if (!NT_STATUS_IS_OK(status)) {
3508 goto fail;
3509 }
3510
3511 ZERO_STRUCT(smb_fname->st);
3512 goto done;
3513 }
3514
3515 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3516 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3517 goto fail;
3518 }
3519 }
3520
3521 /* All file access must go through check_name() */
3522
3523 status = check_name(conn, smb_fname->base_name);
3524 if (!NT_STATUS_IS_OK(status)) {
3525 goto fail;
3526 }
3527
3528 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3529 int ret;
3530 smb_fname->stream_name = NULL;
3531 /* We have to handle this error here. */
3532 if (create_options & FILE_DIRECTORY_FILE) {
3533 status = NT_STATUS_NOT_A_DIRECTORY;
3534 goto fail;
3535 }
3536 if (lp_posix_pathnames()) {
3537 ret = SMB_VFS_LSTAT(conn, smb_fname);
3538 } else {
3539 ret = SMB_VFS_STAT(conn, smb_fname);
3540 }
3541
3542 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3543 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3544 goto fail;
3545 }
3546 }
3547
3548 status = create_file_unixpath(
3549 conn, req, smb_fname, access_mask, share_access,
3550 create_disposition, create_options, file_attributes,
3551 oplock_request, allocation_size, private_flags,
3552 sd, ea_list,
3553 &fsp, &info);
3554
3555 if (!NT_STATUS_IS_OK(status)) {
3556 goto fail;
3557 }
3558
3559 done:
3560 DEBUG(10, ("create_file: info=%d\n", info));
3561
3562 *result = fsp;
3563 if (pinfo != NULL) {
3564 *pinfo = info;
3565 }
3566 return NT_STATUS_OK;
3567
3568 fail:
3569 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3570
3571 if (fsp != NULL) {
3572 close_file(req, fsp, ERROR_CLOSE);
3573 fsp = NULL;
3574 }
3575 return status;
3576 }