?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Pass the directory versions of the RAW-ACL (still not inheritance). Refactor some...
[Samba/bb.git] / source / smbd / open.c
blob967e0c51ad7dcfa8fe0ecb3af939079513c8a54f
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
24 extern const struct generic_mapping file_generic_mapping;
25 extern bool global_client_failed_oplock_break;
26
27 struct deferred_open_record {
28 bool delayed_for_oplocks;
29 struct file_id id;
30 };
31
32 /****************************************************************************
33 fd support routines - attempt to do a dos_open.
34 ****************************************************************************/
35
36 static NTSTATUS fd_open(struct connection_struct *conn,
37 const char *fname,
38 files_struct *fsp,
39 int flags,
40 mode_t mode)
41 {
42 NTSTATUS status = NT_STATUS_OK;
43
44 #ifdef O_NOFOLLOW
45 /*
46 * Never follow symlinks on a POSIX client. The
47 * client should be doing this.
48 */
49
50 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
51 flags |= O_NOFOLLOW;
52 }
53 #endif
54
55 fsp->fh->fd = SMB_VFS_OPEN(conn,fname,fsp,flags,mode);
56 if (fsp->fh->fd == -1) {
57 status = map_nt_error_from_unix(errno);
58 }
59
60 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
61 fname, flags, (int)mode, fsp->fh->fd,
62 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
63
64 return status;
65 }
66
67 /****************************************************************************
68 Close the file associated with a fsp.
69 ****************************************************************************/
70
71 NTSTATUS fd_close(files_struct *fsp)
72 {
73 int ret;
74
75 if (fsp->fh->fd == -1) {
76 return NT_STATUS_OK; /* What we used to call a stat open. */
77 }
78 if (fsp->fh->ref_count > 1) {
79 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
80 }
81
82 ret = SMB_VFS_CLOSE(fsp);
83 fsp->fh->fd = -1;
84 if (ret == -1) {
85 return map_nt_error_from_unix(errno);
86 }
87 return NT_STATUS_OK;
88 }
89
90 /****************************************************************************
91 Change the ownership of a file to that of the parent directory.
92 Do this by fd if possible.
93 ****************************************************************************/
94
95 static void change_file_owner_to_parent(connection_struct *conn,
96 const char *inherit_from_dir,
97 files_struct *fsp)
98 {
99 SMB_STRUCT_STAT parent_st;
100 int ret;
101
102 ret = SMB_VFS_STAT(conn, inherit_from_dir, &parent_st);
103 if (ret == -1) {
104 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
105 "directory %s. Error was %s\n",
106 inherit_from_dir, strerror(errno) ));
107 return;
108 }
109
110 become_root();
111 ret = SMB_VFS_FCHOWN(fsp, parent_st.st_uid, (gid_t)-1);
112 unbecome_root();
113 if (ret == -1) {
114 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
115 "file %s to parent directory uid %u. Error "
116 "was %s\n", fsp->fsp_name,
117 (unsigned int)parent_st.st_uid,
118 strerror(errno) ));
119 }
120
121 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
122 "parent directory uid %u.\n", fsp->fsp_name,
123 (unsigned int)parent_st.st_uid ));
124 }
125
126 static NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
127 const char *inherit_from_dir,
128 const char *fname,
129 SMB_STRUCT_STAT *psbuf)
130 {
131 char *saved_dir = NULL;
132 SMB_STRUCT_STAT sbuf;
133 SMB_STRUCT_STAT parent_st;
134 TALLOC_CTX *ctx = talloc_tos();
135 NTSTATUS status = NT_STATUS_OK;
136 int ret;
137
138 ret = SMB_VFS_STAT(conn, inherit_from_dir, &parent_st);
139 if (ret == -1) {
140 status = map_nt_error_from_unix(errno);
141 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
142 "directory %s. Error was %s\n",
143 inherit_from_dir, strerror(errno) ));
144 return status;
145 }
146
147 /* We've already done an lstat into psbuf, and we know it's a
148 directory. If we can cd into the directory and the dev/ino
149 are the same then we can safely chown without races as
150 we're locking the directory in place by being in it. This
151 should work on any UNIX (thanks tridge :-). JRA.
152 */
153
154 saved_dir = vfs_GetWd(ctx,conn);
155 if (!saved_dir) {
156 status = map_nt_error_from_unix(errno);
157 DEBUG(0,("change_dir_owner_to_parent: failed to get "
158 "current working directory. Error was %s\n",
159 strerror(errno)));
160 return status;
161 }
162
163 /* Chdir into the new path. */
164 if (vfs_ChDir(conn, fname) == -1) {
165 status = map_nt_error_from_unix(errno);
166 DEBUG(0,("change_dir_owner_to_parent: failed to change "
167 "current working directory to %s. Error "
168 "was %s\n", fname, strerror(errno) ));
169 goto out;
170 }
171
172 if (SMB_VFS_STAT(conn,".",&sbuf) == -1) {
173 status = map_nt_error_from_unix(errno);
174 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
175 "directory '.' (%s) Error was %s\n",
176 fname, strerror(errno)));
177 goto out;
178 }
179
180 /* Ensure we're pointing at the same place. */
181 if (sbuf.st_dev != psbuf->st_dev ||
182 sbuf.st_ino != psbuf->st_ino ||
183 sbuf.st_mode != psbuf->st_mode ) {
184 DEBUG(0,("change_dir_owner_to_parent: "
185 "device/inode/mode on directory %s changed. "
186 "Refusing to chown !\n", fname ));
187 status = NT_STATUS_ACCESS_DENIED;
188 goto out;
189 }
190
191 become_root();
192 ret = SMB_VFS_CHOWN(conn, ".", parent_st.st_uid, (gid_t)-1);
193 unbecome_root();
194 if (ret == -1) {
195 status = map_nt_error_from_unix(errno);
196 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
197 "directory %s to parent directory uid %u. "
198 "Error was %s\n", fname,
199 (unsigned int)parent_st.st_uid, strerror(errno) ));
200 goto out;
201 }
202
203 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
204 "directory %s to parent directory uid %u.\n",
205 fname, (unsigned int)parent_st.st_uid ));
206
207 out:
208
209 vfs_ChDir(conn,saved_dir);
210 return status;
211 }
212
213 /****************************************************************************
214 Open a file.
215 ****************************************************************************/
216
217 static NTSTATUS open_file(files_struct *fsp,
218 connection_struct *conn,
219 struct smb_request *req,
220 const char *parent_dir,
221 const char *name,
222 const char *path,
223 SMB_STRUCT_STAT *psbuf,
224 int flags,
225 mode_t unx_mode,
226 uint32 access_mask, /* client requested access mask. */
227 uint32 open_access_mask) /* what we're actually using in the open. */
228 {
229 NTSTATUS status = NT_STATUS_OK;
230 int accmode = (flags & O_ACCMODE);
231 int local_flags = flags;
232 bool file_existed = VALID_STAT(*psbuf);
233
234 fsp->fh->fd = -1;
235 errno = EPERM;
236
237 /* Check permissions */
238
239 /*
240 * This code was changed after seeing a client open request
241 * containing the open mode of (DENY_WRITE/read-only) with
242 * the 'create if not exist' bit set. The previous code
243 * would fail to open the file read only on a read-only share
244 * as it was checking the flags parameter directly against O_RDONLY,
245 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
246 * JRA.
247 */
248
249 if (!CAN_WRITE(conn)) {
250 /* It's a read-only share - fail if we wanted to write. */
251 if(accmode != O_RDONLY) {
252 DEBUG(3,("Permission denied opening %s\n", path));
253 return NT_STATUS_ACCESS_DENIED;
254 } else if(flags & O_CREAT) {
255 /* We don't want to write - but we must make sure that
256 O_CREAT doesn't create the file if we have write
257 access into the directory.
258 */
259 flags &= ~O_CREAT;
260 local_flags &= ~O_CREAT;
261 }
262 }
263
264 /*
265 * This little piece of insanity is inspired by the
266 * fact that an NT client can open a file for O_RDONLY,
267 * but set the create disposition to FILE_EXISTS_TRUNCATE.
268 * If the client *can* write to the file, then it expects to
269 * truncate the file, even though it is opening for readonly.
270 * Quicken uses this stupid trick in backup file creation...
271 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
272 * for helping track this one down. It didn't bite us in 2.0.x
273 * as we always opened files read-write in that release. JRA.
274 */
275
276 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
277 DEBUG(10,("open_file: truncate requested on read-only open "
278 "for file %s\n", path));
279 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
280 }
281
282 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
283 (!file_existed && (local_flags & O_CREAT)) ||
284 ((local_flags & O_TRUNC) == O_TRUNC) ) {
285
286 /*
287 * We can't actually truncate here as the file may be locked.
288 * open_file_ntcreate will take care of the truncate later. JRA.
289 */
290
291 local_flags &= ~O_TRUNC;
292
293 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
294 /*
295 * We would block on opening a FIFO with no one else on the
296 * other end. Do what we used to do and add O_NONBLOCK to the
297 * open flags. JRA.
298 */
299
300 if (file_existed && S_ISFIFO(psbuf->st_mode)) {
301 local_flags |= O_NONBLOCK;
302 }
303 #endif
304
305 /* Don't create files with Microsoft wildcard characters. */
306 if ((local_flags & O_CREAT) && !file_existed &&
307 ms_has_wild(path)) {
308 return NT_STATUS_OBJECT_NAME_INVALID;
309 }
310
311 /* Actually do the open */
312 status = fd_open(conn, path, fsp, local_flags, unx_mode);
313 if (!NT_STATUS_IS_OK(status)) {
314 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
315 "(flags=%d)\n",
316 path,nt_errstr(status),local_flags,flags));
317 return status;
318 }
319
320 if ((local_flags & O_CREAT) && !file_existed) {
321
322 /* Inherit the ACL if required */
323 if (lp_inherit_perms(SNUM(conn))) {
324 inherit_access_posix_acl(conn, parent_dir, path,
325 unx_mode);
326 }
327
328 /* Change the owner if required. */
329 if (lp_inherit_owner(SNUM(conn))) {
330 change_file_owner_to_parent(conn, parent_dir,
331 fsp);
332 }
333
334 notify_fname(conn, NOTIFY_ACTION_ADDED,
335 FILE_NOTIFY_CHANGE_FILE_NAME, path);
336 }
337
338 } else {
339 fsp->fh->fd = -1; /* What we used to call a stat open. */
340 }
341
342 if (!file_existed) {
343 int ret;
344
345 if (fsp->fh->fd == -1) {
346 ret = SMB_VFS_STAT(conn, path, psbuf);
347 } else {
348 ret = SMB_VFS_FSTAT(fsp, psbuf);
349 /* If we have an fd, this stat should succeed. */
350 if (ret == -1) {
351 DEBUG(0,("Error doing fstat on open file %s "
352 "(%s)\n", path,strerror(errno) ));
353 }
354 }
355
356 /* For a non-io open, this stat failing means file not found. JRA */
357 if (ret == -1) {
358 status = map_nt_error_from_unix(errno);
359 fd_close(fsp);
360 return status;
361 }
362 }
363
364 /*
365 * POSIX allows read-only opens of directories. We don't
366 * want to do this (we use a different code path for this)
367 * so catch a directory open and return an EISDIR. JRA.
368 */
369
370 if(S_ISDIR(psbuf->st_mode)) {
371 fd_close(fsp);
372 errno = EISDIR;
373 return NT_STATUS_FILE_IS_A_DIRECTORY;
374 }
375
376 fsp->mode = psbuf->st_mode;
377 fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
378 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
379 fsp->file_pid = req ? req->smbpid : 0;
380 fsp->can_lock = True;
381 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
382 if (!CAN_WRITE(conn)) {
383 fsp->can_write = False;
384 } else {
385 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
386 True : False;
387 }
388 fsp->print_file = False;
389 fsp->modified = False;
390 fsp->sent_oplock_break = NO_BREAK_SENT;
391 fsp->is_directory = False;
392 if (conn->aio_write_behind_list &&
393 is_in_path(path, conn->aio_write_behind_list, conn->case_sensitive)) {
394 fsp->aio_write_behind = True;
395 }
396
397 string_set(&fsp->fsp_name, path);
398 fsp->wcp = NULL; /* Write cache pointer. */
399
400 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
401 conn->server_info->unix_name,
402 fsp->fsp_name,
403 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
404 conn->num_files_open + 1));
405
406 errno = 0;
407 return NT_STATUS_OK;
408 }
409
410 /*******************************************************************
411 Return True if the filename is one of the special executable types.
412 ********************************************************************/
413
414 static bool is_executable(const char *fname)
415 {
416 if ((fname = strrchr_m(fname,'.'))) {
417 if (strequal(fname,".com") ||
418 strequal(fname,".dll") ||
419 strequal(fname,".exe") ||
420 strequal(fname,".sym")) {
421 return True;
422 }
423 }
424 return False;
425 }
426
427 /****************************************************************************
428 Check if we can open a file with a share mode.
429 Returns True if conflict, False if not.
430 ****************************************************************************/
431
432 static bool share_conflict(struct share_mode_entry *entry,
433 uint32 access_mask,
434 uint32 share_access)
435 {
436 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
437 "entry->share_access = 0x%x, "
438 "entry->private_options = 0x%x\n",
439 (unsigned int)entry->access_mask,
440 (unsigned int)entry->share_access,
441 (unsigned int)entry->private_options));
442
443 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
444 (unsigned int)access_mask, (unsigned int)share_access));
445
446 if ((entry->access_mask & (FILE_WRITE_DATA|
447 FILE_APPEND_DATA|
448 FILE_READ_DATA|
449 FILE_EXECUTE|
450 DELETE_ACCESS)) == 0) {
451 DEBUG(10,("share_conflict: No conflict due to "
452 "entry->access_mask = 0x%x\n",
453 (unsigned int)entry->access_mask ));
454 return False;
455 }
456
457 if ((access_mask & (FILE_WRITE_DATA|
458 FILE_APPEND_DATA|
459 FILE_READ_DATA|
460 FILE_EXECUTE|
461 DELETE_ACCESS)) == 0) {
462 DEBUG(10,("share_conflict: No conflict due to "
463 "access_mask = 0x%x\n",
464 (unsigned int)access_mask ));
465 return False;
466 }
467
468 #if 1 /* JRA TEST - Superdebug. */
469 #define CHECK_MASK(num, am, right, sa, share) \
470 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
471 (unsigned int)(num), (unsigned int)(am), \
472 (unsigned int)(right), (unsigned int)(am)&(right) )); \
473 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
474 (unsigned int)(num), (unsigned int)(sa), \
475 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
476 if (((am) & (right)) && !((sa) & (share))) { \
477 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
478 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
479 (unsigned int)(share) )); \
480 return True; \
481 }
482 #else
483 #define CHECK_MASK(num, am, right, sa, share) \
484 if (((am) & (right)) && !((sa) & (share))) { \
485 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
486 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
487 (unsigned int)(share) )); \
488 return True; \
489 }
490 #endif
491
492 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
493 share_access, FILE_SHARE_WRITE);
494 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
495 entry->share_access, FILE_SHARE_WRITE);
496
497 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
498 share_access, FILE_SHARE_READ);
499 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
500 entry->share_access, FILE_SHARE_READ);
501
502 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
503 share_access, FILE_SHARE_DELETE);
504 CHECK_MASK(6, access_mask, DELETE_ACCESS,
505 entry->share_access, FILE_SHARE_DELETE);
506
507 DEBUG(10,("share_conflict: No conflict.\n"));
508 return False;
509 }
510
511 #if defined(DEVELOPER)
512 static void validate_my_share_entries(int num,
513 struct share_mode_entry *share_entry)
514 {
515 files_struct *fsp;
516
517 if (!procid_is_me(&share_entry->pid)) {
518 return;
519 }
520
521 if (is_deferred_open_entry(share_entry) &&
522 !open_was_deferred(share_entry->op_mid)) {
523 char *str = talloc_asprintf(talloc_tos(),
524 "Got a deferred entry without a request: "
525 "PANIC: %s\n",
526 share_mode_str(talloc_tos(), num, share_entry));
527 smb_panic(str);
528 }
529
530 if (!is_valid_share_mode_entry(share_entry)) {
531 return;
532 }
533
534 fsp = file_find_dif(share_entry->id,
535 share_entry->share_file_id);
536 if (!fsp) {
537 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
538 share_mode_str(talloc_tos(), num, share_entry) ));
539 smb_panic("validate_my_share_entries: Cannot match a "
540 "share entry with an open file\n");
541 }
542
543 if (is_deferred_open_entry(share_entry) ||
544 is_unused_share_mode_entry(share_entry)) {
545 goto panic;
546 }
547
548 if ((share_entry->op_type == NO_OPLOCK) &&
549 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
550 /* Someone has already written to it, but I haven't yet
551 * noticed */
552 return;
553 }
554
555 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
556 goto panic;
557 }
558
559 return;
560
561 panic:
562 {
563 char *str;
564 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
565 share_mode_str(talloc_tos(), num, share_entry) ));
566 str = talloc_asprintf(talloc_tos(),
567 "validate_my_share_entries: "
568 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
569 fsp->fsp_name, (unsigned int)fsp->oplock_type,
570 (unsigned int)share_entry->op_type );
571 smb_panic(str);
572 }
573 }
574 #endif
575
576 static bool is_stat_open(uint32 access_mask)
577 {
578 return (access_mask &&
579 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
580 FILE_WRITE_ATTRIBUTES))==0) &&
581 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
582 FILE_WRITE_ATTRIBUTES)) != 0));
583 }
584
585 /****************************************************************************
586 Deal with share modes
587 Invarient: Share mode must be locked on entry and exit.
588 Returns -1 on error, or number of share modes on success (may be zero).
589 ****************************************************************************/
590
591 static NTSTATUS open_mode_check(connection_struct *conn,
592 const char *fname,
593 struct share_mode_lock *lck,
594 uint32 access_mask,
595 uint32 share_access,
596 uint32 create_options,
597 bool *file_existed)
598 {
599 int i;
600
601 if(lck->num_share_modes == 0) {
602 return NT_STATUS_OK;
603 }
604
605 *file_existed = True;
606
607 /* A delete on close prohibits everything */
608
609 if (lck->delete_on_close) {
610 return NT_STATUS_DELETE_PENDING;
611 }
612
613 if (is_stat_open(access_mask)) {
614 /* Stat open that doesn't trigger oplock breaks or share mode
615 * checks... ! JRA. */
616 return NT_STATUS_OK;
617 }
618
619 /*
620 * Check if the share modes will give us access.
621 */
622
623 #if defined(DEVELOPER)
624 for(i = 0; i < lck->num_share_modes; i++) {
625 validate_my_share_entries(i, &lck->share_modes[i]);
626 }
627 #endif
628
629 if (!lp_share_modes(SNUM(conn))) {
630 return NT_STATUS_OK;
631 }
632
633 /* Now we check the share modes, after any oplock breaks. */
634 for(i = 0; i < lck->num_share_modes; i++) {
635
636 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
637 continue;
638 }
639
640 /* someone else has a share lock on it, check to see if we can
641 * too */
642 if (share_conflict(&lck->share_modes[i],
643 access_mask, share_access)) {
644 return NT_STATUS_SHARING_VIOLATION;
645 }
646 }
647
648 return NT_STATUS_OK;
649 }
650
651 static bool is_delete_request(files_struct *fsp) {
652 return ((fsp->access_mask == DELETE_ACCESS) &&
653 (fsp->oplock_type == NO_OPLOCK));
654 }
655
656 /*
657 * 1) No files open at all or internal open: Grant whatever the client wants.
658 *
659 * 2) Exclusive (or batch) oplock around: If the requested access is a delete
660 * request, break if the oplock around is a batch oplock. If it's another
661 * requested access type, break.
662 *
663 * 3) Only level2 around: Grant level2 and do nothing else.
664 */
665
666 static bool delay_for_oplocks(struct share_mode_lock *lck,
667 files_struct *fsp,
668 uint16 mid,
669 int pass_number,
670 int oplock_request)
671 {
672 int i;
673 struct share_mode_entry *exclusive = NULL;
674 bool valid_entry = False;
675 bool delay_it = False;
676 bool have_level2 = False;
677 NTSTATUS status;
678 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
679
680 if (oplock_request & INTERNAL_OPEN_ONLY) {
681 fsp->oplock_type = NO_OPLOCK;
682 }
683
684 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
685 return False;
686 }
687
688 for (i=0; i<lck->num_share_modes; i++) {
689
690 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
691 continue;
692 }
693
694 /* At least one entry is not an invalid or deferred entry. */
695 valid_entry = True;
696
697 if (pass_number == 1) {
698 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
699 SMB_ASSERT(exclusive == NULL);
700 exclusive = &lck->share_modes[i];
701 }
702 } else {
703 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
704 SMB_ASSERT(exclusive == NULL);
705 exclusive = &lck->share_modes[i];
706 }
707 }
708
709 if (lck->share_modes[i].op_type == LEVEL_II_OPLOCK) {
710 SMB_ASSERT(exclusive == NULL);
711 have_level2 = True;
712 }
713 }
714
715 if (!valid_entry) {
716 /* All entries are placeholders or deferred.
717 * Directly grant whatever the client wants. */
718 if (fsp->oplock_type == NO_OPLOCK) {
719 /* Store a level2 oplock, but don't tell the client */
720 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
721 }
722 return False;
723 }
724
725 if (exclusive != NULL) { /* Found an exclusive oplock */
726 SMB_ASSERT(!have_level2);
727 delay_it = is_delete_request(fsp) ?
728 BATCH_OPLOCK_TYPE(exclusive->op_type) : True;
729 }
730
731 if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
732 /* We can at most grant level2 as there are other
733 * level2 or NO_OPLOCK entries. */
734 fsp->oplock_type = LEVEL_II_OPLOCK;
735 }
736
737 if ((fsp->oplock_type == NO_OPLOCK) && have_level2) {
738 /* Store a level2 oplock, but don't tell the client */
739 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
740 }
741
742 if (!delay_it) {
743 return False;
744 }
745
746 /*
747 * Send a break message to the oplock holder and delay the open for
748 * our client.
749 */
750
751 DEBUG(10, ("Sending break request to PID %s\n",
752 procid_str_static(&exclusive->pid)));
753 exclusive->op_mid = mid;
754
755 /* Create the message. */
756 share_mode_entry_to_message(msg, exclusive);
757
758 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
759 don't want this set in the share mode struct pointed to by lck. */
760
761 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
762 SSVAL(msg,6,exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
763 }
764
765 status = messaging_send_buf(smbd_messaging_context(), exclusive->pid,
766 MSG_SMB_BREAK_REQUEST,
767 (uint8 *)msg,
768 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
769 if (!NT_STATUS_IS_OK(status)) {
770 DEBUG(3, ("Could not send oplock break message: %s\n",
771 nt_errstr(status)));
772 }
773
774 return True;
775 }
776
777 static bool request_timed_out(struct timeval request_time,
778 struct timeval timeout)
779 {
780 struct timeval now, end_time;
781 GetTimeOfDay(&now);
782 end_time = timeval_sum(&request_time, &timeout);
783 return (timeval_compare(&end_time, &now) < 0);
784 }
785
786 /****************************************************************************
787 Handle the 1 second delay in returning a SHARING_VIOLATION error.
788 ****************************************************************************/
789
790 static void defer_open(struct share_mode_lock *lck,
791 struct timeval request_time,
792 struct timeval timeout,
793 struct smb_request *req,
794 struct deferred_open_record *state)
795 {
796 int i;
797
798 /* Paranoia check */
799
800 for (i=0; i<lck->num_share_modes; i++) {
801 struct share_mode_entry *e = &lck->share_modes[i];
802
803 if (!is_deferred_open_entry(e)) {
804 continue;
805 }
806
807 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
808 DEBUG(0, ("Trying to defer an already deferred "
809 "request: mid=%d, exiting\n", req->mid));
810 exit_server("attempt to defer a deferred request");
811 }
812 }
813
814 /* End paranoia check */
815
816 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
817 "open entry for mid %u\n",
818 (unsigned int)request_time.tv_sec,
819 (unsigned int)request_time.tv_usec,
820 (unsigned int)req->mid));
821
822 if (!push_deferred_smb_message(req, request_time, timeout,
823 (char *)state, sizeof(*state))) {
824 exit_server("push_deferred_smb_message failed");
825 }
826 add_deferred_open(lck, req->mid, request_time, state->id);
827
828 /*
829 * Push the MID of this packet on the signing queue.
830 * We only do this once, the first time we push the packet
831 * onto the deferred open queue, as this has a side effect
832 * of incrementing the response sequence number.
833 */
834
835 srv_defer_sign_response(req->mid);
836 }
837
838
839 /****************************************************************************
840 On overwrite open ensure that the attributes match.
841 ****************************************************************************/
842
843 static bool open_match_attributes(connection_struct *conn,
844 const char *path,
845 uint32 old_dos_attr,
846 uint32 new_dos_attr,
847 mode_t existing_unx_mode,
848 mode_t new_unx_mode,
849 mode_t *returned_unx_mode)
850 {
851 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
852
853 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
854 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
855
856 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
857 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
858 *returned_unx_mode = new_unx_mode;
859 } else {
860 *returned_unx_mode = (mode_t)0;
861 }
862
863 DEBUG(10,("open_match_attributes: file %s old_dos_attr = 0x%x, "
864 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
865 "returned_unx_mode = 0%o\n",
866 path,
867 (unsigned int)old_dos_attr,
868 (unsigned int)existing_unx_mode,
869 (unsigned int)new_dos_attr,
870 (unsigned int)*returned_unx_mode ));
871
872 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
873 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
874 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
875 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
876 return False;
877 }
878 }
879 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
880 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
881 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
882 return False;
883 }
884 }
885 return True;
886 }
887
888 /****************************************************************************
889 Special FCB or DOS processing in the case of a sharing violation.
890 Try and find a duplicated file handle.
891 ****************************************************************************/
892
893 static files_struct *fcb_or_dos_open(connection_struct *conn,
894 const char *fname,
895 struct file_id id,
896 uint16 file_pid,
897 uint16 vuid,
898 uint32 access_mask,
899 uint32 share_access,
900 uint32 create_options)
901 {
902 files_struct *fsp;
903 files_struct *dup_fsp;
904
905 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
906 "file %s.\n", fname ));
907
908 for(fsp = file_find_di_first(id); fsp;
909 fsp = file_find_di_next(fsp)) {
910
911 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
912 "vuid = %u, file_pid = %u, private_options = 0x%x "
913 "access_mask = 0x%x\n", fsp->fsp_name,
914 fsp->fh->fd, (unsigned int)fsp->vuid,
915 (unsigned int)fsp->file_pid,
916 (unsigned int)fsp->fh->private_options,
917 (unsigned int)fsp->access_mask ));
918
919 if (fsp->fh->fd != -1 &&
920 fsp->vuid == vuid &&
921 fsp->file_pid == file_pid &&
922 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
923 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
924 (fsp->access_mask & FILE_WRITE_DATA) &&
925 strequal(fsp->fsp_name, fname)) {
926 DEBUG(10,("fcb_or_dos_open: file match\n"));
927 break;
928 }
929 }
930
931 if (!fsp) {
932 return NULL;
933 }
934
935 /* quite an insane set of semantics ... */
936 if (is_executable(fname) &&
937 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
938 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
939 return NULL;
940 }
941
942 /* We need to duplicate this fsp. */
943 if (!NT_STATUS_IS_OK(dup_file_fsp(fsp, access_mask, share_access,
944 create_options, &dup_fsp))) {
945 return NULL;
946 }
947
948 return dup_fsp;
949 }
950
951 /****************************************************************************
952 Open a file with a share mode - old openX method - map into NTCreate.
953 ****************************************************************************/
954
955 bool map_open_params_to_ntcreate(const char *fname, int deny_mode, int open_func,
956 uint32 *paccess_mask,
957 uint32 *pshare_mode,
958 uint32 *pcreate_disposition,
959 uint32 *pcreate_options)
960 {
961 uint32 access_mask;
962 uint32 share_mode;
963 uint32 create_disposition;
964 uint32 create_options = 0;
965
966 DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
967 "open_func = 0x%x\n",
968 fname, (unsigned int)deny_mode, (unsigned int)open_func ));
969
970 /* Create the NT compatible access_mask. */
971 switch (GET_OPENX_MODE(deny_mode)) {
972 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
973 case DOS_OPEN_RDONLY:
974 access_mask = FILE_GENERIC_READ;
975 break;
976 case DOS_OPEN_WRONLY:
977 access_mask = FILE_GENERIC_WRITE;
978 break;
979 case DOS_OPEN_RDWR:
980 case DOS_OPEN_FCB:
981 access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
982 break;
983 default:
984 DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
985 (unsigned int)GET_OPENX_MODE(deny_mode)));
986 return False;
987 }
988
989 /* Create the NT compatible create_disposition. */
990 switch (open_func) {
991 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
992 create_disposition = FILE_CREATE;
993 break;
994
995 case OPENX_FILE_EXISTS_OPEN:
996 create_disposition = FILE_OPEN;
997 break;
998
999 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
1000 create_disposition = FILE_OPEN_IF;
1001 break;
1002
1003 case OPENX_FILE_EXISTS_TRUNCATE:
1004 create_disposition = FILE_OVERWRITE;
1005 break;
1006
1007 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
1008 create_disposition = FILE_OVERWRITE_IF;
1009 break;
1010
1011 default:
1012 /* From samba4 - to be confirmed. */
1013 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
1014 create_disposition = FILE_CREATE;
1015 break;
1016 }
1017 DEBUG(10,("map_open_params_to_ntcreate: bad "
1018 "open_func 0x%x\n", (unsigned int)open_func));
1019 return False;
1020 }
1021
1022 /* Create the NT compatible share modes. */
1023 switch (GET_DENY_MODE(deny_mode)) {
1024 case DENY_ALL:
1025 share_mode = FILE_SHARE_NONE;
1026 break;
1027
1028 case DENY_WRITE:
1029 share_mode = FILE_SHARE_READ;
1030 break;
1031
1032 case DENY_READ:
1033 share_mode = FILE_SHARE_WRITE;
1034 break;
1035
1036 case DENY_NONE:
1037 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1038 break;
1039
1040 case DENY_DOS:
1041 create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1042 if (is_executable(fname)) {
1043 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1044 } else {
1045 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1046 share_mode = FILE_SHARE_READ;
1047 } else {
1048 share_mode = FILE_SHARE_NONE;
1049 }
1050 }
1051 break;
1052
1053 case DENY_FCB:
1054 create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1055 share_mode = FILE_SHARE_NONE;
1056 break;
1057
1058 default:
1059 DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1060 (unsigned int)GET_DENY_MODE(deny_mode) ));
1061 return False;
1062 }
1063
1064 DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1065 "share_mode = 0x%x, create_disposition = 0x%x, "
1066 "create_options = 0x%x\n",
1067 fname,
1068 (unsigned int)access_mask,
1069 (unsigned int)share_mode,
1070 (unsigned int)create_disposition,
1071 (unsigned int)create_options ));
1072
1073 if (paccess_mask) {
1074 *paccess_mask = access_mask;
1075 }
1076 if (pshare_mode) {
1077 *pshare_mode = share_mode;
1078 }
1079 if (pcreate_disposition) {
1080 *pcreate_disposition = create_disposition;
1081 }
1082 if (pcreate_options) {
1083 *pcreate_options = create_options;
1084 }
1085
1086 return True;
1087
1088 }
1089
1090 static void schedule_defer_open(struct share_mode_lock *lck,
1091 struct timeval request_time,
1092 struct smb_request *req)
1093 {
1094 struct deferred_open_record state;
1095
1096 /* This is a relative time, added to the absolute
1097 request_time value to get the absolute timeout time.
1098 Note that if this is the second or greater time we enter
1099 this codepath for this particular request mid then
1100 request_time is left as the absolute time of the *first*
1101 time this request mid was processed. This is what allows
1102 the request to eventually time out. */
1103
1104 struct timeval timeout;
1105
1106 /* Normally the smbd we asked should respond within
1107 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1108 * the client did, give twice the timeout as a safety
1109 * measure here in case the other smbd is stuck
1110 * somewhere else. */
1111
1112 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1113
1114 /* Nothing actually uses state.delayed_for_oplocks
1115 but it's handy to differentiate in debug messages
1116 between a 30 second delay due to oplock break, and
1117 a 1 second delay for share mode conflicts. */
1118
1119 state.delayed_for_oplocks = True;
1120 state.id = lck->id;
1121
1122 if (!request_timed_out(request_time, timeout)) {
1123 defer_open(lck, request_time, timeout, req, &state);
1124 }
1125 }
1126
1127 /****************************************************************************
1128 Work out what access_mask to use from what the client sent us.
1129 ****************************************************************************/
1130
1131 static NTSTATUS calculate_access_mask(connection_struct *conn,
1132 const char *fname,
1133 bool file_existed,
1134 uint32_t access_mask,
1135 uint32_t *access_mask_out)
1136 {
1137 NTSTATUS status;
1138
1139 /*
1140 * Convert GENERIC bits to specific bits.
1141 */
1142
1143 se_map_generic(&access_mask, &file_generic_mapping);
1144
1145 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1146 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1147 if (file_existed) {
1148 struct security_descriptor *sd;
1149 uint32_t access_granted = 0;
1150
1151 status = SMB_VFS_GET_NT_ACL(conn, fname,
1152 (OWNER_SECURITY_INFORMATION |
1153 GROUP_SECURITY_INFORMATION |
1154 DACL_SECURITY_INFORMATION),&sd);
1155
1156 if (!NT_STATUS_IS_OK(status)) {
1157 DEBUG(10, ("calculate_access_mask: Could not get acl "
1158 "on file %s: %s\n",
1159 fname,
1160 nt_errstr(status)));
1161 return NT_STATUS_ACCESS_DENIED;
1162 }
1163
1164 status = se_access_check(sd, conn->server_info->ptok,
1165 access_mask, &access_granted);
1166
1167 TALLOC_FREE(sd);
1168
1169 if (!NT_STATUS_IS_OK(status)) {
1170 DEBUG(10, ("calculate_access_mask: Access denied on "
1171 "file %s: when calculating maximum access\n",
1172 fname));
1173 return NT_STATUS_ACCESS_DENIED;
1174 }
1175
1176 access_mask = access_granted;
1177 } else {
1178 access_mask = FILE_GENERIC_ALL;
1179 }
1180 }
1181
1182 *access_mask_out = access_mask;
1183 return NT_STATUS_OK;
1184 }
1185
1186 /****************************************************************************
1187 Open a file with a share mode.
1188 ****************************************************************************/
1189
1190 NTSTATUS open_file_ntcreate(connection_struct *conn,
1191 struct smb_request *req,
1192 const char *fname,
1193 SMB_STRUCT_STAT *psbuf,
1194 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1195 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1196 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1197 uint32 create_options, /* options such as delete on close. */
1198 uint32 new_dos_attributes, /* attributes used for new file. */
1199 int oplock_request, /* internal Samba oplock codes. */
1200 /* Information (FILE_EXISTS etc.) */
1201 int *pinfo,
1202 files_struct **result)
1203 {
1204 int flags=0;
1205 int flags2=0;
1206 bool file_existed = VALID_STAT(*psbuf);
1207 bool def_acl = False;
1208 bool posix_open = False;
1209 bool new_file_created = False;
1210 struct file_id id;
1211 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1212 files_struct *fsp = NULL;
1213 mode_t new_unx_mode = (mode_t)0;
1214 mode_t unx_mode = (mode_t)0;
1215 int info;
1216 uint32 existing_dos_attributes = 0;
1217 struct pending_message_list *pml = NULL;
1218 struct timeval request_time = timeval_zero();
1219 struct share_mode_lock *lck = NULL;
1220 uint32 open_access_mask = access_mask;
1221 NTSTATUS status;
1222 int ret_flock;
1223 char *parent_dir;
1224 const char *newname;
1225
1226 ZERO_STRUCT(id);
1227
1228 if (conn->printer) {
1229 /*
1230 * Printers are handled completely differently.
1231 * Most of the passed parameters are ignored.
1232 */
1233
1234 if (pinfo) {
1235 *pinfo = FILE_WAS_CREATED;
1236 }
1237
1238 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n", fname));
1239
1240 return print_fsp_open(conn, fname, req->vuid, result);
1241 }
1242
1243 if (!parent_dirname_talloc(talloc_tos(), fname, &parent_dir,
1244 &newname)) {
1245 return NT_STATUS_NO_MEMORY;
1246 }
1247
1248 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1249 posix_open = True;
1250 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1251 new_dos_attributes = 0;
1252 } else {
1253 /* We add aARCH to this as this mode is only used if the file is
1254 * created new. */
1255 unx_mode = unix_mode(conn, new_dos_attributes | aARCH, fname,
1256 parent_dir);
1257 }
1258
1259 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1260 "access_mask=0x%x share_access=0x%x "
1261 "create_disposition = 0x%x create_options=0x%x "
1262 "unix mode=0%o oplock_request=%d\n",
1263 fname, new_dos_attributes, access_mask, share_access,
1264 create_disposition, create_options, unx_mode,
1265 oplock_request));
1266
1267 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1268 DEBUG(0, ("No smb request but not an internal only open!\n"));
1269 return NT_STATUS_INTERNAL_ERROR;
1270 }
1271
1272 /*
1273 * Only non-internal opens can be deferred at all
1274 */
1275
1276 if ((req != NULL)
1277 && ((pml = get_open_deferred_message(req->mid)) != NULL)) {
1278 struct deferred_open_record *state =
1279 (struct deferred_open_record *)pml->private_data.data;
1280
1281 /* Remember the absolute time of the original
1282 request with this mid. We'll use it later to
1283 see if this has timed out. */
1284
1285 request_time = pml->request_time;
1286
1287 /* Remove the deferred open entry under lock. */
1288 lck = get_share_mode_lock(talloc_tos(), state->id, NULL, NULL,
1289 NULL);
1290 if (lck == NULL) {
1291 DEBUG(0, ("could not get share mode lock\n"));
1292 } else {
1293 del_deferred_open_entry(lck, req->mid);
1294 TALLOC_FREE(lck);
1295 }
1296
1297 /* Ensure we don't reprocess this message. */
1298 remove_deferred_open_smb_message(req->mid);
1299 }
1300
1301 status = check_name(conn, fname);
1302 if (!NT_STATUS_IS_OK(status)) {
1303 return status;
1304 }
1305
1306 if (!posix_open) {
1307 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1308 if (file_existed) {
1309 existing_dos_attributes = dos_mode(conn, fname, psbuf);
1310 }
1311 }
1312
1313 /* ignore any oplock requests if oplocks are disabled */
1314 if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break ||
1315 IS_VETO_OPLOCK_PATH(conn, fname)) {
1316 /* Mask off everything except the private Samba bits. */
1317 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1318 }
1319
1320 /* this is for OS/2 long file names - say we don't support them */
1321 if (!lp_posix_pathnames() && strstr(fname,".+,;=[].")) {
1322 /* OS/2 Workplace shell fix may be main code stream in a later
1323 * release. */
1324 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1325 "supported.\n"));
1326 if (use_nt_status()) {
1327 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1328 }
1329 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1330 }
1331
1332 switch( create_disposition ) {
1333 /*
1334 * Currently we're using FILE_SUPERSEDE as the same as
1335 * FILE_OVERWRITE_IF but they really are
1336 * different. FILE_SUPERSEDE deletes an existing file
1337 * (requiring delete access) then recreates it.
1338 */
1339 case FILE_SUPERSEDE:
1340 /* If file exists replace/overwrite. If file doesn't
1341 * exist create. */
1342 flags2 |= (O_CREAT | O_TRUNC);
1343 break;
1344
1345 case FILE_OVERWRITE_IF:
1346 /* If file exists replace/overwrite. If file doesn't
1347 * exist create. */
1348 flags2 |= (O_CREAT | O_TRUNC);
1349 break;
1350
1351 case FILE_OPEN:
1352 /* If file exists open. If file doesn't exist error. */
1353 if (!file_existed) {
1354 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1355 "requested for file %s and file "
1356 "doesn't exist.\n", fname ));
1357 errno = ENOENT;
1358 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1359 }
1360 break;
1361
1362 case FILE_OVERWRITE:
1363 /* If file exists overwrite. If file doesn't exist
1364 * error. */
1365 if (!file_existed) {
1366 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1367 "requested for file %s and file "
1368 "doesn't exist.\n", fname ));
1369 errno = ENOENT;
1370 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1371 }
1372 flags2 |= O_TRUNC;
1373 break;
1374
1375 case FILE_CREATE:
1376 /* If file exists error. If file doesn't exist
1377 * create. */
1378 if (file_existed) {
1379 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1380 "requested for file %s and file "
1381 "already exists.\n", fname ));
1382 if (S_ISDIR(psbuf->st_mode)) {
1383 errno = EISDIR;
1384 } else {
1385 errno = EEXIST;
1386 }
1387 return map_nt_error_from_unix(errno);
1388 }
1389 flags2 |= (O_CREAT|O_EXCL);
1390 break;
1391
1392 case FILE_OPEN_IF:
1393 /* If file exists open. If file doesn't exist
1394 * create. */
1395 flags2 |= O_CREAT;
1396 break;
1397
1398 default:
1399 return NT_STATUS_INVALID_PARAMETER;
1400 }
1401
1402 /* We only care about matching attributes on file exists and
1403 * overwrite. */
1404
1405 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1406 (create_disposition == FILE_OVERWRITE_IF))) {
1407 if (!open_match_attributes(conn, fname,
1408 existing_dos_attributes,
1409 new_dos_attributes, psbuf->st_mode,
1410 unx_mode, &new_unx_mode)) {
1411 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1412 "for file %s (%x %x) (0%o, 0%o)\n",
1413 fname, existing_dos_attributes,
1414 new_dos_attributes,
1415 (unsigned int)psbuf->st_mode,
1416 (unsigned int)unx_mode ));
1417 errno = EACCES;
1418 return NT_STATUS_ACCESS_DENIED;
1419 }
1420 }
1421
1422 status = calculate_access_mask(conn, fname, file_existed,
1423 access_mask,
1424 &access_mask);
1425 if (!NT_STATUS_IS_OK(status)) {
1426 DEBUG(10, ("open_file_ntcreate: calculate_access_mask "
1427 "on file %s returned %s\n",
1428 fname,
1429 nt_errstr(status)));
1430 return status;
1431 }
1432
1433 open_access_mask = access_mask;
1434
1435 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1436 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1437 }
1438
1439 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1440 "access_mask=0x%x\n", fname, access_mask ));
1441
1442 /*
1443 * Note that we ignore the append flag as append does not
1444 * mean the same thing under DOS and Unix.
1445 */
1446
1447 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1448 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1449 /* DENY_DOS opens are always underlying read-write on the
1450 file handle, no matter what the requested access mask
1451 says. */
1452 if ((create_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1453 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1454 flags = O_RDWR;
1455 } else {
1456 flags = O_WRONLY;
1457 }
1458 } else {
1459 flags = O_RDONLY;
1460 }
1461
1462 /*
1463 * Currently we only look at FILE_WRITE_THROUGH for create options.
1464 */
1465
1466 #if defined(O_SYNC)
1467 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1468 flags2 |= O_SYNC;
1469 }
1470 #endif /* O_SYNC */
1471
1472 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1473 flags2 |= O_APPEND;
1474 }
1475
1476 if (!posix_open && !CAN_WRITE(conn)) {
1477 /*
1478 * We should really return a permission denied error if either
1479 * O_CREAT or O_TRUNC are set, but for compatibility with
1480 * older versions of Samba we just AND them out.
1481 */
1482 flags2 &= ~(O_CREAT|O_TRUNC);
1483 }
1484
1485 /*
1486 * Ensure we can't write on a read-only share or file.
1487 */
1488
1489 if (flags != O_RDONLY && file_existed &&
1490 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1491 DEBUG(5,("open_file_ntcreate: write access requested for "
1492 "file %s on read only %s\n",
1493 fname, !CAN_WRITE(conn) ? "share" : "file" ));
1494 errno = EACCES;
1495 return NT_STATUS_ACCESS_DENIED;
1496 }
1497
1498 status = file_new(conn, &fsp);
1499 if(!NT_STATUS_IS_OK(status)) {
1500 return status;
1501 }
1502
1503 fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
1504 fsp->share_access = share_access;
1505 fsp->fh->private_options = create_options;
1506 fsp->access_mask = open_access_mask; /* We change this to the
1507 * requested access_mask after
1508 * the open is done. */
1509 fsp->posix_open = posix_open;
1510
1511 /* Ensure no SAMBA_PRIVATE bits can be set. */
1512 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1513
1514 if (timeval_is_zero(&request_time)) {
1515 request_time = fsp->open_time;
1516 }
1517
1518 if (file_existed) {
1519 struct timespec old_write_time = get_mtimespec(psbuf);
1520 id = vfs_file_id_from_sbuf(conn, psbuf);
1521
1522 lck = get_share_mode_lock(talloc_tos(), id,
1523 conn->connectpath,
1524 fname, &old_write_time);
1525
1526 if (lck == NULL) {
1527 file_free(fsp);
1528 DEBUG(0, ("Could not get share mode lock\n"));
1529 return NT_STATUS_SHARING_VIOLATION;
1530 }
1531
1532 /* First pass - send break only on batch oplocks. */
1533 if ((req != NULL)
1534 && delay_for_oplocks(lck, fsp, req->mid, 1,
1535 oplock_request)) {
1536 schedule_defer_open(lck, request_time, req);
1537 TALLOC_FREE(lck);
1538 file_free(fsp);
1539 return NT_STATUS_SHARING_VIOLATION;
1540 }
1541
1542 /* Use the client requested access mask here, not the one we
1543 * open with. */
1544 status = open_mode_check(conn, fname, lck,
1545 access_mask, share_access,
1546 create_options, &file_existed);
1547
1548 if (NT_STATUS_IS_OK(status)) {
1549 /* We might be going to allow this open. Check oplock
1550 * status again. */
1551 /* Second pass - send break for both batch or
1552 * exclusive oplocks. */
1553 if ((req != NULL)
1554 && delay_for_oplocks(lck, fsp, req->mid, 2,
1555 oplock_request)) {
1556 schedule_defer_open(lck, request_time, req);
1557 TALLOC_FREE(lck);
1558 file_free(fsp);
1559 return NT_STATUS_SHARING_VIOLATION;
1560 }
1561 }
1562
1563 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1564 /* DELETE_PENDING is not deferred for a second */
1565 TALLOC_FREE(lck);
1566 file_free(fsp);
1567 return status;
1568 }
1569
1570 if (!NT_STATUS_IS_OK(status)) {
1571 uint32 can_access_mask;
1572 bool can_access = True;
1573
1574 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1575
1576 /* Check if this can be done with the deny_dos and fcb
1577 * calls. */
1578 if (create_options &
1579 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1580 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1581 files_struct *fsp_dup;
1582
1583 if (req == NULL) {
1584 DEBUG(0, ("DOS open without an SMB "
1585 "request!\n"));
1586 TALLOC_FREE(lck);
1587 file_free(fsp);
1588 return NT_STATUS_INTERNAL_ERROR;
1589 }
1590
1591 /* Use the client requested access mask here,
1592 * not the one we open with. */
1593 fsp_dup = fcb_or_dos_open(conn, fname, id,
1594 req->smbpid,
1595 req->vuid,
1596 access_mask,
1597 share_access,
1598 create_options);
1599
1600 if (fsp_dup) {
1601 TALLOC_FREE(lck);
1602 file_free(fsp);
1603 if (pinfo) {
1604 *pinfo = FILE_WAS_OPENED;
1605 }
1606 conn->num_files_open++;
1607 *result = fsp_dup;
1608 return NT_STATUS_OK;
1609 }
1610 }
1611
1612 /*
1613 * This next line is a subtlety we need for
1614 * MS-Access. If a file open will fail due to share
1615 * permissions and also for security (access) reasons,
1616 * we need to return the access failed error, not the
1617 * share error. We can't open the file due to kernel
1618 * oplock deadlock (it's possible we failed above on
1619 * the open_mode_check()) so use a userspace check.
1620 */
1621
1622 if (flags & O_RDWR) {
1623 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1624 } else if (flags & O_WRONLY) {
1625 can_access_mask = FILE_WRITE_DATA;
1626 } else {
1627 can_access_mask = FILE_READ_DATA;
1628 }
1629
1630 if (((can_access_mask & FILE_WRITE_DATA) && !CAN_WRITE(conn)) ||
1631 !can_access_file_data(conn,fname,psbuf,can_access_mask)) {
1632 can_access = False;
1633 }
1634
1635 /*
1636 * If we're returning a share violation, ensure we
1637 * cope with the braindead 1 second delay.
1638 */
1639
1640 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1641 lp_defer_sharing_violations()) {
1642 struct timeval timeout;
1643 struct deferred_open_record state;
1644 int timeout_usecs;
1645
1646 /* this is a hack to speed up torture tests
1647 in 'make test' */
1648 timeout_usecs = lp_parm_int(SNUM(conn),
1649 "smbd","sharedelay",
1650 SHARING_VIOLATION_USEC_WAIT);
1651
1652 /* This is a relative time, added to the absolute
1653 request_time value to get the absolute timeout time.
1654 Note that if this is the second or greater time we enter
1655 this codepath for this particular request mid then
1656 request_time is left as the absolute time of the *first*
1657 time this request mid was processed. This is what allows
1658 the request to eventually time out. */
1659
1660 timeout = timeval_set(0, timeout_usecs);
1661
1662 /* Nothing actually uses state.delayed_for_oplocks
1663 but it's handy to differentiate in debug messages
1664 between a 30 second delay due to oplock break, and
1665 a 1 second delay for share mode conflicts. */
1666
1667 state.delayed_for_oplocks = False;
1668 state.id = id;
1669
1670 if ((req != NULL)
1671 && !request_timed_out(request_time,
1672 timeout)) {
1673 defer_open(lck, request_time, timeout,
1674 req, &state);
1675 }
1676 }
1677
1678 TALLOC_FREE(lck);
1679 if (can_access) {
1680 /*
1681 * We have detected a sharing violation here
1682 * so return the correct error code
1683 */
1684 status = NT_STATUS_SHARING_VIOLATION;
1685 } else {
1686 status = NT_STATUS_ACCESS_DENIED;
1687 }
1688 file_free(fsp);
1689 return status;
1690 }
1691
1692 /*
1693 * We exit this block with the share entry *locked*.....
1694 */
1695 }
1696
1697 SMB_ASSERT(!file_existed || (lck != NULL));
1698
1699 /*
1700 * Ensure we pay attention to default ACLs on directories if required.
1701 */
1702
1703 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1704 (def_acl = directory_has_default_acl(conn, parent_dir))) {
1705 unx_mode = 0777;
1706 }
1707
1708 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1709 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1710 (unsigned int)flags, (unsigned int)flags2,
1711 (unsigned int)unx_mode, (unsigned int)access_mask,
1712 (unsigned int)open_access_mask));
1713
1714 /*
1715 * open_file strips any O_TRUNC flags itself.
1716 */
1717
1718 fsp_open = open_file(fsp, conn, req, parent_dir, newname, fname, psbuf,
1719 flags|flags2, unx_mode, access_mask,
1720 open_access_mask);
1721
1722 if (!NT_STATUS_IS_OK(fsp_open)) {
1723 if (lck != NULL) {
1724 TALLOC_FREE(lck);
1725 }
1726 file_free(fsp);
1727 return fsp_open;
1728 }
1729
1730 if (!file_existed) {
1731 struct timespec old_write_time = get_mtimespec(psbuf);
1732 /*
1733 * Deal with the race condition where two smbd's detect the
1734 * file doesn't exist and do the create at the same time. One
1735 * of them will win and set a share mode, the other (ie. this
1736 * one) should check if the requested share mode for this
1737 * create is allowed.
1738 */
1739
1740 /*
1741 * Now the file exists and fsp is successfully opened,
1742 * fsp->dev and fsp->inode are valid and should replace the
1743 * dev=0,inode=0 from a non existent file. Spotted by
1744 * Nadav Danieli <nadavd@exanet.com>. JRA.
1745 */
1746
1747 id = fsp->file_id;
1748
1749 lck = get_share_mode_lock(talloc_tos(), id,
1750 conn->connectpath,
1751 fname, &old_write_time);
1752
1753 if (lck == NULL) {
1754 DEBUG(0, ("open_file_ntcreate: Could not get share "
1755 "mode lock for %s\n", fname));
1756 fd_close(fsp);
1757 file_free(fsp);
1758 return NT_STATUS_SHARING_VIOLATION;
1759 }
1760
1761 /* First pass - send break only on batch oplocks. */
1762 if ((req != NULL)
1763 && delay_for_oplocks(lck, fsp, req->mid, 1,
1764 oplock_request)) {
1765 schedule_defer_open(lck, request_time, req);
1766 TALLOC_FREE(lck);
1767 fd_close(fsp);
1768 file_free(fsp);
1769 return NT_STATUS_SHARING_VIOLATION;
1770 }
1771
1772 status = open_mode_check(conn, fname, lck,
1773 access_mask, share_access,
1774 create_options, &file_existed);
1775
1776 if (NT_STATUS_IS_OK(status)) {
1777 /* We might be going to allow this open. Check oplock
1778 * status again. */
1779 /* Second pass - send break for both batch or
1780 * exclusive oplocks. */
1781 if ((req != NULL)
1782 && delay_for_oplocks(lck, fsp, req->mid, 2,
1783 oplock_request)) {
1784 schedule_defer_open(lck, request_time, req);
1785 TALLOC_FREE(lck);
1786 fd_close(fsp);
1787 file_free(fsp);
1788 return NT_STATUS_SHARING_VIOLATION;
1789 }
1790 }
1791
1792 if (!NT_STATUS_IS_OK(status)) {
1793 struct deferred_open_record state;
1794
1795 fd_close(fsp);
1796 file_free(fsp);
1797
1798 state.delayed_for_oplocks = False;
1799 state.id = id;
1800
1801 /* Do it all over again immediately. In the second
1802 * round we will find that the file existed and handle
1803 * the DELETE_PENDING and FCB cases correctly. No need
1804 * to duplicate the code here. Essentially this is a
1805 * "goto top of this function", but don't tell
1806 * anybody... */
1807
1808 if (req != NULL) {
1809 defer_open(lck, request_time, timeval_zero(),
1810 req, &state);
1811 }
1812 TALLOC_FREE(lck);
1813 return status;
1814 }
1815
1816 /*
1817 * We exit this block with the share entry *locked*.....
1818 */
1819
1820 }
1821
1822 SMB_ASSERT(lck != NULL);
1823
1824 /* note that we ignore failure for the following. It is
1825 basically a hack for NFS, and NFS will never set one of
1826 these only read them. Nobody but Samba can ever set a deny
1827 mode and we have already checked our more authoritative
1828 locking database for permission to set this deny mode. If
1829 the kernel refuses the operations then the kernel is wrong.
1830 note that GPFS supports it as well - jmcd */
1831
1832 if (fsp->fh->fd != -1) {
1833 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access);
1834 if(ret_flock == -1 ){
1835
1836 TALLOC_FREE(lck);
1837 fd_close(fsp);
1838 file_free(fsp);
1839
1840 return NT_STATUS_SHARING_VIOLATION;
1841 }
1842 }
1843
1844 /*
1845 * At this point onwards, we can guarentee that the share entry
1846 * is locked, whether we created the file or not, and that the
1847 * deny mode is compatible with all current opens.
1848 */
1849
1850 /*
1851 * If requested, truncate the file.
1852 */
1853
1854 if (flags2&O_TRUNC) {
1855 /*
1856 * We are modifing the file after open - update the stat
1857 * struct..
1858 */
1859 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
1860 (SMB_VFS_FSTAT(fsp, psbuf)==-1)) {
1861 status = map_nt_error_from_unix(errno);
1862 TALLOC_FREE(lck);
1863 fd_close(fsp);
1864 file_free(fsp);
1865 return status;
1866 }
1867 }
1868
1869 /* Record the options we were opened with. */
1870 fsp->share_access = share_access;
1871 fsp->fh->private_options = create_options;
1872 /*
1873 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
1874 */
1875 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
1876
1877 if (file_existed) {
1878 /* stat opens on existing files don't get oplocks. */
1879 if (is_stat_open(open_access_mask)) {
1880 fsp->oplock_type = NO_OPLOCK;
1881 }
1882
1883 if (!(flags2 & O_TRUNC)) {
1884 info = FILE_WAS_OPENED;
1885 } else {
1886 info = FILE_WAS_OVERWRITTEN;
1887 }
1888 } else {
1889 info = FILE_WAS_CREATED;
1890 }
1891
1892 if (pinfo) {
1893 *pinfo = info;
1894 }
1895
1896 /*
1897 * Setup the oplock info in both the shared memory and
1898 * file structs.
1899 */
1900
1901 if ((fsp->oplock_type != NO_OPLOCK) &&
1902 (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK)) {
1903 if (!set_file_oplock(fsp, fsp->oplock_type)) {
1904 /* Could not get the kernel oplock */
1905 fsp->oplock_type = NO_OPLOCK;
1906 }
1907 }
1908
1909 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
1910 new_file_created = True;
1911 }
1912
1913 set_share_mode(lck, fsp, conn->server_info->utok.uid, 0,
1914 fsp->oplock_type, new_file_created);
1915
1916 /* Handle strange delete on close create semantics. */
1917 if ((create_options & FILE_DELETE_ON_CLOSE)
1918 && (((conn->fs_capabilities & FILE_NAMED_STREAMS)
1919 && is_ntfs_stream_name(fname))
1920 || can_set_initial_delete_on_close(lck))) {
1921 status = can_set_delete_on_close(fsp, True, new_dos_attributes);
1922
1923 if (!NT_STATUS_IS_OK(status)) {
1924 /* Remember to delete the mode we just added. */
1925 del_share_mode(lck, fsp);
1926 TALLOC_FREE(lck);
1927 fd_close(fsp);
1928 file_free(fsp);
1929 return status;
1930 }
1931 /* Note that here we set the *inital* delete on close flag,
1932 not the regular one. The magic gets handled in close. */
1933 fsp->initial_delete_on_close = True;
1934 }
1935
1936 if (new_file_created) {
1937 /* Files should be initially set as archive */
1938 if (lp_map_archive(SNUM(conn)) ||
1939 lp_store_dos_attributes(SNUM(conn))) {
1940 if (!posix_open) {
1941 SMB_STRUCT_STAT tmp_sbuf;
1942 SET_STAT_INVALID(tmp_sbuf);
1943 if (file_set_dosmode(
1944 conn, fname,
1945 new_dos_attributes | aARCH,
1946 &tmp_sbuf, parent_dir,
1947 true) == 0) {
1948 unx_mode = tmp_sbuf.st_mode;
1949 }
1950 }
1951 }
1952 }
1953
1954 /*
1955 * Take care of inherited ACLs on created files - if default ACL not
1956 * selected.
1957 */
1958
1959 if (!posix_open && !file_existed && !def_acl) {
1960
1961 int saved_errno = errno; /* We might get ENOSYS in the next
1962 * call.. */
1963
1964 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
1965 errno == ENOSYS) {
1966 errno = saved_errno; /* Ignore ENOSYS */
1967 }
1968
1969 } else if (new_unx_mode) {
1970
1971 int ret = -1;
1972
1973 /* Attributes need changing. File already existed. */
1974
1975 {
1976 int saved_errno = errno; /* We might get ENOSYS in the
1977 * next call.. */
1978 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
1979
1980 if (ret == -1 && errno == ENOSYS) {
1981 errno = saved_errno; /* Ignore ENOSYS */
1982 } else {
1983 DEBUG(5, ("open_file_ntcreate: reset "
1984 "attributes of file %s to 0%o\n",
1985 fname, (unsigned int)new_unx_mode));
1986 ret = 0; /* Don't do the fchmod below. */
1987 }
1988 }
1989
1990 if ((ret == -1) &&
1991 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
1992 DEBUG(5, ("open_file_ntcreate: failed to reset "
1993 "attributes of file %s to 0%o\n",
1994 fname, (unsigned int)new_unx_mode));
1995 }
1996
1997 /* If this is a successful open, we must remove any deferred open
1998 * records. */
1999 if (req != NULL) {
2000 del_deferred_open_entry(lck, req->mid);
2001 }
2002 TALLOC_FREE(lck);
2003
2004 conn->num_files_open++;
2005
2006 *result = fsp;
2007 return NT_STATUS_OK;
2008 }
2009
2010 /****************************************************************************
2011 Open a file for for write to ensure that we can fchmod it.
2012 ****************************************************************************/
2013
2014 NTSTATUS open_file_fchmod(connection_struct *conn, const char *fname,
2015 SMB_STRUCT_STAT *psbuf, files_struct **result)
2016 {
2017 files_struct *fsp = NULL;
2018 NTSTATUS status;
2019
2020 if (!VALID_STAT(*psbuf)) {
2021 return NT_STATUS_INVALID_PARAMETER;
2022 }
2023
2024 status = file_new(conn, &fsp);
2025 if(!NT_STATUS_IS_OK(status)) {
2026 return status;
2027 }
2028
2029 /* note! we must use a non-zero desired access or we don't get
2030 a real file descriptor. Oh what a twisted web we weave. */
2031 status = open_file(fsp, conn, NULL, NULL, NULL, fname, psbuf, O_WRONLY,
2032 0, FILE_WRITE_DATA, FILE_WRITE_DATA);
2033
2034 /*
2035 * This is not a user visible file open.
2036 * Don't set a share mode and don't increment
2037 * the conn->num_files_open.
2038 */
2039
2040 if (!NT_STATUS_IS_OK(status)) {
2041 file_free(fsp);
2042 return status;
2043 }
2044
2045 *result = fsp;
2046 return NT_STATUS_OK;
2047 }
2048
2049 /****************************************************************************
2050 Close the fchmod file fd - ensure no locks are lost.
2051 ****************************************************************************/
2052
2053 NTSTATUS close_file_fchmod(files_struct *fsp)
2054 {
2055 NTSTATUS status = fd_close(fsp);
2056 file_free(fsp);
2057 return status;
2058 }
2059
2060 static NTSTATUS mkdir_internal(connection_struct *conn,
2061 const char *name,
2062 uint32 file_attributes,
2063 SMB_STRUCT_STAT *psbuf)
2064 {
2065 mode_t mode;
2066 char *parent_dir;
2067 const char *dirname;
2068 NTSTATUS status;
2069 bool posix_open = false;
2070
2071 if(!CAN_WRITE(conn)) {
2072 DEBUG(5,("mkdir_internal: failing create on read-only share "
2073 "%s\n", lp_servicename(SNUM(conn))));
2074 return NT_STATUS_ACCESS_DENIED;
2075 }
2076
2077 status = check_name(conn, name);
2078 if (!NT_STATUS_IS_OK(status)) {
2079 return status;
2080 }
2081
2082 if (!parent_dirname_talloc(talloc_tos(), name, &parent_dir,
2083 &dirname)) {
2084 return NT_STATUS_NO_MEMORY;
2085 }
2086
2087 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2088 posix_open = true;
2089 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2090 } else {
2091 mode = unix_mode(conn, aDIR, name, parent_dir);
2092 }
2093
2094 if (SMB_VFS_MKDIR(conn, name, mode) != 0) {
2095 return map_nt_error_from_unix(errno);
2096 }
2097
2098 /* Ensure we're checking for a symlink here.... */
2099 /* We don't want to get caught by a symlink racer. */
2100
2101 if (SMB_VFS_LSTAT(conn, name, psbuf) == -1) {
2102 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2103 name, strerror(errno)));
2104 return map_nt_error_from_unix(errno);
2105 }
2106
2107 if (!S_ISDIR(psbuf->st_mode)) {
2108 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2109 name));
2110 return NT_STATUS_ACCESS_DENIED;
2111 }
2112
2113 if (lp_store_dos_attributes(SNUM(conn))) {
2114 if (!posix_open) {
2115 file_set_dosmode(conn, name,
2116 file_attributes | aDIR, NULL,
2117 parent_dir,
2118 true);
2119 }
2120 }
2121
2122 if (lp_inherit_perms(SNUM(conn))) {
2123 inherit_access_posix_acl(conn, parent_dir, name, mode);
2124 }
2125
2126 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2127 /*
2128 * Check if high bits should have been set,
2129 * then (if bits are missing): add them.
2130 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2131 * dir.
2132 */
2133 if (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO) && (mode & ~psbuf->st_mode)) {
2134 SMB_VFS_CHMOD(conn, name,
2135 psbuf->st_mode | (mode & ~psbuf->st_mode));
2136 }
2137 }
2138
2139 /* Change the owner if required. */
2140 if (lp_inherit_owner(SNUM(conn))) {
2141 change_dir_owner_to_parent(conn, parent_dir, name, psbuf);
2142 }
2143
2144 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2145 name);
2146
2147 return NT_STATUS_OK;
2148 }
2149
2150 /****************************************************************************
2151 Open a directory from an NT SMB call.
2152 ****************************************************************************/
2153
2154 NTSTATUS open_directory(connection_struct *conn,
2155 struct smb_request *req,
2156 const char *fname,
2157 SMB_STRUCT_STAT *psbuf,
2158 uint32 access_mask,
2159 uint32 share_access,
2160 uint32 create_disposition,
2161 uint32 create_options,
2162 uint32 file_attributes,
2163 int *pinfo,
2164 files_struct **result)
2165 {
2166 files_struct *fsp = NULL;
2167 bool dir_existed = VALID_STAT(*psbuf) ? True : False;
2168 struct share_mode_lock *lck = NULL;
2169 NTSTATUS status;
2170 struct timespec mtimespec;
2171 int info = 0;
2172
2173 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2174 "share_access = 0x%x create_options = 0x%x, "
2175 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2176 fname,
2177 (unsigned int)access_mask,
2178 (unsigned int)share_access,
2179 (unsigned int)create_options,
2180 (unsigned int)create_disposition,
2181 (unsigned int)file_attributes));
2182
2183 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2184 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2185 is_ntfs_stream_name(fname)) {
2186 DEBUG(2, ("open_directory: %s is a stream name!\n", fname));
2187 return NT_STATUS_NOT_A_DIRECTORY;
2188 }
2189
2190 status = calculate_access_mask(conn, fname, dir_existed,
2191 access_mask,
2192 &access_mask);
2193 if (!NT_STATUS_IS_OK(status)) {
2194 DEBUG(10, ("open_directory: calculate_access_mask "
2195 "on file %s returned %s\n",
2196 fname,
2197 nt_errstr(status)));
2198 return status;
2199 }
2200
2201 switch( create_disposition ) {
2202 case FILE_OPEN:
2203
2204 info = FILE_WAS_OPENED;
2205
2206 /*
2207 * We want to follow symlinks here.
2208 */
2209
2210 if (SMB_VFS_STAT(conn, fname, psbuf) != 0) {
2211 return map_nt_error_from_unix(errno);
2212 }
2213
2214 break;
2215
2216 case FILE_CREATE:
2217
2218 /* If directory exists error. If directory doesn't
2219 * exist create. */
2220
2221 status = mkdir_internal(conn,
2222 fname,
2223 file_attributes,
2224 psbuf);
2225
2226 if (!NT_STATUS_IS_OK(status)) {
2227 DEBUG(2, ("open_directory: unable to create "
2228 "%s. Error was %s\n", fname,
2229 nt_errstr(status)));
2230 return status;
2231 }
2232
2233 info = FILE_WAS_CREATED;
2234 break;
2235
2236 case FILE_OPEN_IF:
2237 /*
2238 * If directory exists open. If directory doesn't
2239 * exist create.
2240 */
2241
2242 status = mkdir_internal(conn,
2243 fname,
2244 file_attributes,
2245 psbuf);
2246
2247 if (NT_STATUS_IS_OK(status)) {
2248 info = FILE_WAS_CREATED;
2249 }
2250
2251 if (NT_STATUS_EQUAL(status,
2252 NT_STATUS_OBJECT_NAME_COLLISION)) {
2253 info = FILE_WAS_OPENED;
2254 status = NT_STATUS_OK;
2255 }
2256
2257 break;
2258
2259 case FILE_SUPERSEDE:
2260 case FILE_OVERWRITE:
2261 case FILE_OVERWRITE_IF:
2262 default:
2263 DEBUG(5,("open_directory: invalid create_disposition "
2264 "0x%x for directory %s\n",
2265 (unsigned int)create_disposition, fname));
2266 return NT_STATUS_INVALID_PARAMETER;
2267 }
2268
2269 if(!S_ISDIR(psbuf->st_mode)) {
2270 DEBUG(5,("open_directory: %s is not a directory !\n",
2271 fname ));
2272 return NT_STATUS_NOT_A_DIRECTORY;
2273 }
2274
2275 status = file_new(conn, &fsp);
2276 if(!NT_STATUS_IS_OK(status)) {
2277 return status;
2278 }
2279
2280 /*
2281 * Setup the files_struct for it.
2282 */
2283
2284 fsp->mode = psbuf->st_mode;
2285 fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
2286 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2287 fsp->file_pid = req ? req->smbpid : 0;
2288 fsp->can_lock = False;
2289 fsp->can_read = False;
2290 fsp->can_write = False;
2291
2292 fsp->share_access = share_access;
2293 fsp->fh->private_options = create_options;
2294 /*
2295 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2296 */
2297 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2298 fsp->print_file = False;
2299 fsp->modified = False;
2300 fsp->oplock_type = NO_OPLOCK;
2301 fsp->sent_oplock_break = NO_BREAK_SENT;
2302 fsp->is_directory = True;
2303 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2304
2305 string_set(&fsp->fsp_name,fname);
2306
2307 mtimespec = get_mtimespec(psbuf);
2308
2309 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2310 conn->connectpath,
2311 fname, &mtimespec);
2312
2313 if (lck == NULL) {
2314 DEBUG(0, ("open_directory: Could not get share mode lock for %s\n", fname));
2315 file_free(fsp);
2316 return NT_STATUS_SHARING_VIOLATION;
2317 }
2318
2319 status = open_mode_check(conn, fname, lck,
2320 access_mask, share_access,
2321 create_options, &dir_existed);
2322
2323 if (!NT_STATUS_IS_OK(status)) {
2324 TALLOC_FREE(lck);
2325 file_free(fsp);
2326 return status;
2327 }
2328
2329 set_share_mode(lck, fsp, conn->server_info->utok.uid, 0, NO_OPLOCK,
2330 True);
2331
2332 /* For directories the delete on close bit at open time seems
2333 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2334 if (create_options & FILE_DELETE_ON_CLOSE) {
2335 status = can_set_delete_on_close(fsp, True, 0);
2336 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2337 TALLOC_FREE(lck);
2338 file_free(fsp);
2339 return status;
2340 }
2341
2342 if (NT_STATUS_IS_OK(status)) {
2343 /* Note that here we set the *inital* delete on close flag,
2344 not the regular one. The magic gets handled in close. */
2345 fsp->initial_delete_on_close = True;
2346 }
2347 }
2348
2349 TALLOC_FREE(lck);
2350
2351 if (pinfo) {
2352 *pinfo = info;
2353 }
2354
2355 conn->num_files_open++;
2356
2357 *result = fsp;
2358 return NT_STATUS_OK;
2359 }
2360
2361 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req, const char *directory)
2362 {
2363 NTSTATUS status;
2364 SMB_STRUCT_STAT sbuf;
2365 files_struct *fsp;
2366
2367 SET_STAT_INVALID(sbuf);
2368
2369 status = open_directory(conn, req, directory, &sbuf,
2370 FILE_READ_ATTRIBUTES, /* Just a stat open */
2371 FILE_SHARE_NONE, /* Ignored for stat opens */
2372 FILE_CREATE,
2373 0,
2374 FILE_ATTRIBUTE_DIRECTORY,
2375 NULL,
2376 &fsp);
2377
2378 if (NT_STATUS_IS_OK(status)) {
2379 close_file(fsp, NORMAL_CLOSE);
2380 }
2381
2382 return status;
2383 }
2384
2385 /****************************************************************************
2386 Receive notification that one of our open files has been renamed by another
2387 smbd process.
2388 ****************************************************************************/
2389
2390 void msg_file_was_renamed(struct messaging_context *msg,
2391 void *private_data,
2392 uint32_t msg_type,
2393 struct server_id server_id,
2394 DATA_BLOB *data)
2395 {
2396 files_struct *fsp;
2397 char *frm = (char *)data->data;
2398 struct file_id id;
2399 const char *sharepath;
2400 const char *newname;
2401 size_t sp_len;
2402
2403 if (data->data == NULL
2404 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2405 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2406 (int)data->length));
2407 return;
2408 }
2409
2410 /* Unpack the message. */
2411 pull_file_id_16(frm, &id);
2412 sharepath = &frm[16];
2413 newname = sharepath + strlen(sharepath) + 1;
2414 sp_len = strlen(sharepath);
2415
2416 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2417 "file_id %s\n",
2418 sharepath, newname, file_id_string_tos(&id)));
2419
2420 for(fsp = file_find_di_first(id); fsp; fsp = file_find_di_next(fsp)) {
2421 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2422 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2423 fsp->fnum, fsp->fsp_name, newname ));
2424 string_set(&fsp->fsp_name, newname);
2425 } else {
2426 /* TODO. JRA. */
2427 /* Now we have the complete path we can work out if this is
2428 actually within this share and adjust newname accordingly. */
2429 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2430 "not sharepath %s) "
2431 "fnum %d from %s -> %s\n",
2432 fsp->conn->connectpath,
2433 sharepath,
2434 fsp->fnum,
2435 fsp->fsp_name,
2436 newname ));
2437 }
2438 }
2439 }
2440
2441 struct case_semantics_state {
2442 connection_struct *conn;
2443 bool case_sensitive;
2444 bool case_preserve;
2445 bool short_case_preserve;
2446 };
2447
2448 /****************************************************************************
2449 Restore case semantics.
2450 ****************************************************************************/
2451 static int restore_case_semantics(struct case_semantics_state *state)
2452 {
2453 state->conn->case_sensitive = state->case_sensitive;
2454 state->conn->case_preserve = state->case_preserve;
2455 state->conn->short_case_preserve = state->short_case_preserve;
2456 return 0;
2457 }
2458
2459 /****************************************************************************
2460 Save case semantics.
2461 ****************************************************************************/
2462 static struct case_semantics_state *set_posix_case_semantics(TALLOC_CTX *mem_ctx,
2463 connection_struct *conn)
2464 {
2465 struct case_semantics_state *result;
2466
2467 if (!(result = talloc(mem_ctx, struct case_semantics_state))) {
2468 DEBUG(0, ("talloc failed\n"));
2469 return NULL;
2470 }
2471
2472 result->conn = conn;
2473 result->case_sensitive = conn->case_sensitive;
2474 result->case_preserve = conn->case_preserve;
2475 result->short_case_preserve = conn->short_case_preserve;
2476
2477 /* Set to POSIX. */
2478 conn->case_sensitive = True;
2479 conn->case_preserve = True;
2480 conn->short_case_preserve = True;
2481
2482 talloc_set_destructor(result, restore_case_semantics);
2483
2484 return result;
2485 }
2486
2487 /*
2488 * If a main file is opened for delete, all streams need to be checked for
2489 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2490 * If that works, delete them all by setting the delete on close and close.
2491 */
2492
2493 static NTSTATUS open_streams_for_delete(connection_struct *conn,
2494 const char *fname)
2495 {
2496 struct stream_struct *stream_info;
2497 files_struct **streams;
2498 int i;
2499 unsigned int num_streams;
2500 TALLOC_CTX *frame = talloc_stackframe();
2501 NTSTATUS status;
2502
2503 status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
2504 &num_streams, &stream_info);
2505
2506 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2507 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2508 DEBUG(10, ("no streams around\n"));
2509 TALLOC_FREE(frame);
2510 return NT_STATUS_OK;
2511 }
2512
2513 if (!NT_STATUS_IS_OK(status)) {
2514 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
2515 nt_errstr(status)));
2516 goto fail;
2517 }
2518
2519 DEBUG(10, ("open_streams_for_delete found %d streams\n",
2520 num_streams));
2521
2522 if (num_streams == 0) {
2523 TALLOC_FREE(frame);
2524 return NT_STATUS_OK;
2525 }
2526
2527 streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
2528 if (streams == NULL) {
2529 DEBUG(0, ("talloc failed\n"));
2530 status = NT_STATUS_NO_MEMORY;
2531 goto fail;
2532 }
2533
2534 for (i=0; i<num_streams; i++) {
2535 char *streamname;
2536
2537 if (strequal(stream_info[i].name, "::$DATA")) {
2538 streams[i] = NULL;
2539 continue;
2540 }
2541
2542 streamname = talloc_asprintf(talloc_tos(), "%s%s", fname,
2543 stream_info[i].name);
2544
2545 if (streamname == NULL) {
2546 DEBUG(0, ("talloc_aprintf failed\n"));
2547 status = NT_STATUS_NO_MEMORY;
2548 goto fail;
2549 }
2550
2551 status = create_file_unixpath
2552 (conn, /* conn */
2553 NULL, /* req */
2554 streamname, /* fname */
2555 DELETE_ACCESS, /* access_mask */
2556 FILE_SHARE_READ | FILE_SHARE_WRITE
2557 | FILE_SHARE_DELETE, /* share_access */
2558 FILE_OPEN, /* create_disposition*/
2559 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* create_options */
2560 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
2561 0, /* oplock_request */
2562 0, /* allocation_size */
2563 NULL, /* sd */
2564 NULL, /* ea_list */
2565 &streams[i], /* result */
2566 NULL, /* pinfo */
2567 NULL); /* psbuf */
2568
2569 TALLOC_FREE(streamname);
2570
2571 if (!NT_STATUS_IS_OK(status)) {
2572 DEBUG(10, ("Could not open stream %s: %s\n",
2573 streamname, nt_errstr(status)));
2574 break;
2575 }
2576 }
2577
2578 /*
2579 * don't touch the variable "status" beyond this point :-)
2580 */
2581
2582 for (i -= 1 ; i >= 0; i--) {
2583 if (streams[i] == NULL) {
2584 continue;
2585 }
2586
2587 DEBUG(10, ("Closing stream # %d, %s\n", i,
2588 streams[i]->fsp_name));
2589 close_file(streams[i], NORMAL_CLOSE);
2590 }
2591
2592 fail:
2593 TALLOC_FREE(frame);
2594 return status;
2595 }
2596
2597 /*
2598 * Wrapper around open_file_ntcreate and open_directory
2599 */
2600
2601 NTSTATUS create_file_unixpath(connection_struct *conn,
2602 struct smb_request *req,
2603 const char *fname,
2604 uint32_t access_mask,
2605 uint32_t share_access,
2606 uint32_t create_disposition,
2607 uint32_t create_options,
2608 uint32_t file_attributes,
2609 uint32_t oplock_request,
2610 SMB_BIG_UINT allocation_size,
2611 struct security_descriptor *sd,
2612 struct ea_list *ea_list,
2613
2614 files_struct **result,
2615 int *pinfo,
2616 SMB_STRUCT_STAT *psbuf)
2617 {
2618 SMB_STRUCT_STAT sbuf;
2619 int info = FILE_WAS_OPENED;
2620 files_struct *base_fsp = NULL;
2621 files_struct *fsp = NULL;
2622 NTSTATUS status;
2623
2624 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
2625 "file_attributes = 0x%x, share_access = 0x%x, "
2626 "create_disposition = 0x%x create_options = 0x%x "
2627 "oplock_request = 0x%x ea_list = 0x%p, sd = 0x%p, "
2628 "fname = %s\n",
2629 (unsigned int)access_mask,
2630 (unsigned int)file_attributes,
2631 (unsigned int)share_access,
2632 (unsigned int)create_disposition,
2633 (unsigned int)create_options,
2634 (unsigned int)oplock_request,
2635 ea_list, sd, fname));
2636
2637 if (create_options & FILE_OPEN_BY_FILE_ID) {
2638 status = NT_STATUS_NOT_SUPPORTED;
2639 goto fail;
2640 }
2641
2642 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
2643 status = NT_STATUS_INVALID_PARAMETER;
2644 goto fail;
2645 }
2646
2647 if (req == NULL) {
2648 oplock_request |= INTERNAL_OPEN_ONLY;
2649 }
2650
2651 if (psbuf != NULL) {
2652 sbuf = *psbuf;
2653 }
2654 else {
2655 if (SMB_VFS_STAT(conn, fname, &sbuf) == -1) {
2656 SET_STAT_INVALID(sbuf);
2657 }
2658 }
2659
2660 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2661 && (access_mask & DELETE_ACCESS)
2662 && !is_ntfs_stream_name(fname)) {
2663 /*
2664 * We can't open a file with DELETE access if any of the
2665 * streams is open without FILE_SHARE_DELETE
2666 */
2667 status = open_streams_for_delete(conn, fname);
2668
2669 if (!NT_STATUS_IS_OK(status)) {
2670 goto fail;
2671 }
2672 }
2673
2674 /* This is the correct thing to do (check every time) but can_delete
2675 * is expensive (it may have to read the parent directory
2676 * permissions). So for now we're not doing it unless we have a strong
2677 * hint the client is really going to delete this file. If the client
2678 * is forcing FILE_CREATE let the filesystem take care of the
2679 * permissions. */
2680
2681 /* Setting FILE_SHARE_DELETE is the hint. */
2682
2683 if (lp_acl_check_permissions(SNUM(conn))
2684 && (create_disposition != FILE_CREATE)
2685 && (share_access & FILE_SHARE_DELETE)
2686 && (access_mask & DELETE_ACCESS)
2687 && (!can_delete_file_in_directory(conn, fname))) {
2688 status = NT_STATUS_ACCESS_DENIED;
2689 goto fail;
2690 }
2691
2692 #if 0
2693 /* We need to support SeSecurityPrivilege for this. */
2694 if ((access_mask & SEC_RIGHT_SYSTEM_SECURITY) &&
2695 !user_has_privileges(current_user.nt_user_token,
2696 &se_security)) {
2697 status = NT_STATUS_PRIVILEGE_NOT_HELD;
2698 goto fail;
2699 }
2700 #endif
2701
2702 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2703 && is_ntfs_stream_name(fname)
2704 && (!(create_options & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
2705 char *base;
2706 uint32 base_create_disposition;
2707
2708 if (create_options & FILE_DIRECTORY_FILE) {
2709 status = NT_STATUS_NOT_A_DIRECTORY;
2710 goto fail;
2711 }
2712
2713 status = split_ntfs_stream_name(talloc_tos(), fname,
2714 &base, NULL);
2715 if (!NT_STATUS_IS_OK(status)) {
2716 DEBUG(10, ("create_file_unixpath: "
2717 "split_ntfs_stream_name failed: %s\n",
2718 nt_errstr(status)));
2719 goto fail;
2720 }
2721
2722 SMB_ASSERT(!is_ntfs_stream_name(base)); /* paranoia.. */
2723
2724 switch (create_disposition) {
2725 case FILE_OPEN:
2726 base_create_disposition = FILE_OPEN;
2727 break;
2728 default:
2729 base_create_disposition = FILE_OPEN_IF;
2730 break;
2731 }
2732
2733 status = create_file_unixpath(conn, NULL, base, 0,
2734 FILE_SHARE_READ
2735 | FILE_SHARE_WRITE
2736 | FILE_SHARE_DELETE,
2737 base_create_disposition,
2738 0, 0, 0, 0, NULL, NULL,
2739 &base_fsp, NULL, NULL);
2740 if (!NT_STATUS_IS_OK(status)) {
2741 DEBUG(10, ("create_file_unixpath for base %s failed: "
2742 "%s\n", base, nt_errstr(status)));
2743 goto fail;
2744 }
2745 }
2746
2747 /*
2748 * If it's a request for a directory open, deal with it separately.
2749 */
2750
2751 if (create_options & FILE_DIRECTORY_FILE) {
2752
2753 if (create_options & FILE_NON_DIRECTORY_FILE) {
2754 status = NT_STATUS_INVALID_PARAMETER;
2755 goto fail;
2756 }
2757
2758 /* Can't open a temp directory. IFS kit test. */
2759 if (file_attributes & FILE_ATTRIBUTE_TEMPORARY) {
2760 status = NT_STATUS_INVALID_PARAMETER;
2761 goto fail;
2762 }
2763
2764 /*
2765 * We will get a create directory here if the Win32
2766 * app specified a security descriptor in the
2767 * CreateDirectory() call.
2768 */
2769
2770 oplock_request = 0;
2771 status = open_directory(
2772 conn, req, fname, &sbuf, access_mask, share_access,
2773 create_disposition, create_options, file_attributes,
2774 &info, &fsp);
2775 } else {
2776
2777 /*
2778 * Ordinary file case.
2779 */
2780
2781 status = open_file_ntcreate(
2782 conn, req, fname, &sbuf, access_mask, share_access,
2783 create_disposition, create_options, file_attributes,
2784 oplock_request, &info, &fsp);
2785
2786 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
2787
2788 /*
2789 * Fail the open if it was explicitly a non-directory
2790 * file.
2791 */
2792
2793 if (create_options & FILE_NON_DIRECTORY_FILE) {
2794 status = NT_STATUS_FILE_IS_A_DIRECTORY;
2795 goto fail;
2796 }
2797
2798 oplock_request = 0;
2799 status = open_directory(
2800 conn, req, fname, &sbuf, access_mask,
2801 share_access, create_disposition,
2802 create_options, file_attributes,
2803 &info, &fsp);
2804 }
2805 }
2806
2807 if (!NT_STATUS_IS_OK(status)) {
2808 goto fail;
2809 }
2810
2811 /*
2812 * According to the MS documentation, the only time the security
2813 * descriptor is applied to the opened file is iff we *created* the
2814 * file; an existing file stays the same.
2815 *
2816 * Also, it seems (from observation) that you can open the file with
2817 * any access mask but you can still write the sd. We need to override
2818 * the granted access before we call set_sd
2819 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
2820 */
2821
2822 if ((sd != NULL) && (info == FILE_WAS_CREATED)
2823 && lp_nt_acl_support(SNUM(conn))) {
2824
2825 uint32_t sec_info_sent = ALL_SECURITY_INFORMATION;
2826 uint32_t saved_access_mask = fsp->access_mask;
2827
2828 if (sd->owner_sid == NULL) {
2829 sec_info_sent &= ~OWNER_SECURITY_INFORMATION;
2830 }
2831 if (sd->group_sid == NULL) {
2832 sec_info_sent &= ~GROUP_SECURITY_INFORMATION;
2833 }
2834 if (sd->sacl == NULL) {
2835 sec_info_sent &= ~SACL_SECURITY_INFORMATION;
2836 }
2837 if (sd->dacl == NULL) {
2838 sec_info_sent &= ~DACL_SECURITY_INFORMATION;
2839 }
2840
2841 fsp->access_mask = FILE_GENERIC_ALL;
2842
2843 /* Convert all the generic bits. */
2844 security_acl_map_generic(sd->dacl, &file_generic_mapping);
2845 security_acl_map_generic(sd->sacl, &file_generic_mapping);
2846
2847 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
2848
2849 fsp->access_mask = saved_access_mask;
2850
2851 if (!NT_STATUS_IS_OK(status)) {
2852 goto fail;
2853 }
2854 }
2855
2856 if ((ea_list != NULL) && (info == FILE_WAS_CREATED)) {
2857 status = set_ea(conn, fsp, fname, ea_list);
2858 if (!NT_STATUS_IS_OK(status)) {
2859 goto fail;
2860 }
2861 }
2862
2863 if (!fsp->is_directory && S_ISDIR(sbuf.st_mode)) {
2864 status = NT_STATUS_ACCESS_DENIED;
2865 goto fail;
2866 }
2867
2868 /* Save the requested allocation size. */
2869 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
2870 if (allocation_size
2871 && (allocation_size > sbuf.st_size)) {
2872 fsp->initial_allocation_size = smb_roundup(
2873 fsp->conn, allocation_size);
2874 if (fsp->is_directory) {
2875 /* Can't set allocation size on a directory. */
2876 status = NT_STATUS_ACCESS_DENIED;
2877 goto fail;
2878 }
2879 if (vfs_allocate_file_space(
2880 fsp, fsp->initial_allocation_size) == -1) {
2881 status = NT_STATUS_DISK_FULL;
2882 goto fail;
2883 }
2884 } else {
2885 fsp->initial_allocation_size = smb_roundup(
2886 fsp->conn, (SMB_BIG_UINT)sbuf.st_size);
2887 }
2888 }
2889
2890 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
2891
2892 /*
2893 * Set fsp->base_fsp late enough that we can't "goto fail" anymore. In
2894 * the fail: branch we call close_file(fsp, ERROR_CLOSE) which would
2895 * also close fsp->base_fsp which we have to also do explicitly in
2896 * this routine here, as not in all "goto fail:" we have the fsp set
2897 * up already to be initialized with the base_fsp.
2898 */
2899
2900 fsp->base_fsp = base_fsp;
2901
2902 *result = fsp;
2903 if (pinfo != NULL) {
2904 *pinfo = info;
2905 }
2906 if (psbuf != NULL) {
2907 if ((fsp->fh == NULL) || (fsp->fh->fd == -1)) {
2908 *psbuf = sbuf;
2909 }
2910 else {
2911 SMB_VFS_FSTAT(fsp, psbuf);
2912 }
2913 }
2914 return NT_STATUS_OK;
2915
2916 fail:
2917 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
2918
2919 if (fsp != NULL) {
2920 close_file(fsp, ERROR_CLOSE);
2921 fsp = NULL;
2922 }
2923 if (base_fsp != NULL) {
2924 close_file(base_fsp, ERROR_CLOSE);
2925 base_fsp = NULL;
2926 }
2927 return status;
2928 }
2929
2930 NTSTATUS create_file(connection_struct *conn,
2931 struct smb_request *req,
2932 uint16_t root_dir_fid,
2933 const char *fname,
2934 uint32_t access_mask,
2935 uint32_t share_access,
2936 uint32_t create_disposition,
2937 uint32_t create_options,
2938 uint32_t file_attributes,
2939 uint32_t oplock_request,
2940 SMB_BIG_UINT allocation_size,
2941 struct security_descriptor *sd,
2942 struct ea_list *ea_list,
2943
2944 files_struct **result,
2945 int *pinfo,
2946 SMB_STRUCT_STAT *psbuf)
2947 {
2948 struct case_semantics_state *case_state = NULL;
2949 SMB_STRUCT_STAT sbuf;
2950 int info = FILE_WAS_OPENED;
2951 files_struct *fsp = NULL;
2952 NTSTATUS status;
2953
2954 DEBUG(10,("create_file: access_mask = 0x%x "
2955 "file_attributes = 0x%x, share_access = 0x%x, "
2956 "create_disposition = 0x%x create_options = 0x%x "
2957 "oplock_request = 0x%x "
2958 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
2959 "fname = %s\n",
2960 (unsigned int)access_mask,
2961 (unsigned int)file_attributes,
2962 (unsigned int)share_access,
2963 (unsigned int)create_disposition,
2964 (unsigned int)create_options,
2965 (unsigned int)oplock_request,
2966 (unsigned int)root_dir_fid,
2967 ea_list, sd, fname));
2968
2969 /*
2970 * Get the file name.
2971 */
2972
2973 if (root_dir_fid != 0) {
2974 /*
2975 * This filename is relative to a directory fid.
2976 */
2977 char *parent_fname = NULL;
2978 files_struct *dir_fsp = file_fsp(root_dir_fid);
2979
2980 if (dir_fsp == NULL) {
2981 status = NT_STATUS_INVALID_HANDLE;
2982 goto fail;
2983 }
2984
2985 if (!dir_fsp->is_directory) {
2986
2987 /*
2988 * Check to see if this is a mac fork of some kind.
2989 */
2990
2991 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2992 is_ntfs_stream_name(fname)) {
2993 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
2994 goto fail;
2995 }
2996
2997 /*
2998 we need to handle the case when we get a
2999 relative open relative to a file and the
3000 pathname is blank - this is a reopen!
3001 (hint from demyn plantenberg)
3002 */
3003
3004 status = NT_STATUS_INVALID_HANDLE;
3005 goto fail;
3006 }
3007
3008 if (ISDOT(dir_fsp->fsp_name)) {
3009 /*
3010 * We're at the toplevel dir, the final file name
3011 * must not contain ./, as this is filtered out
3012 * normally by srvstr_get_path and unix_convert
3013 * explicitly rejects paths containing ./.
3014 */
3015 parent_fname = talloc_strdup(talloc_tos(), "");
3016 if (parent_fname == NULL) {
3017 status = NT_STATUS_NO_MEMORY;
3018 goto fail;
3019 }
3020 } else {
3021 size_t dir_name_len = strlen(dir_fsp->fsp_name);
3022
3023 /*
3024 * Copy in the base directory name.
3025 */
3026
3027 parent_fname = TALLOC_ARRAY(talloc_tos(), char,
3028 dir_name_len+2);
3029 if (parent_fname == NULL) {
3030 status = NT_STATUS_NO_MEMORY;
3031 goto fail;
3032 }
3033 memcpy(parent_fname, dir_fsp->fsp_name,
3034 dir_name_len+1);
3035
3036 /*
3037 * Ensure it ends in a '/'.
3038 * We used TALLOC_SIZE +2 to add space for the '/'.
3039 */
3040
3041 if(dir_name_len
3042 && (parent_fname[dir_name_len-1] != '\\')
3043 && (parent_fname[dir_name_len-1] != '/')) {
3044 parent_fname[dir_name_len] = '/';
3045 parent_fname[dir_name_len+1] = '\0';
3046 }
3047 }
3048
3049 fname = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3050 fname);
3051 if (fname == NULL) {
3052 status = NT_STATUS_NO_MEMORY;
3053 goto fail;
3054 }
3055 }
3056
3057 /*
3058 * Check to see if this is a mac fork of some kind.
3059 */
3060
3061 if (is_ntfs_stream_name(fname)) {
3062 enum FAKE_FILE_TYPE fake_file_type;
3063
3064 fake_file_type = is_fake_file(fname);
3065
3066 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3067
3068 /*
3069 * Here we go! support for changing the disk quotas
3070 * --metze
3071 *
3072 * We need to fake up to open this MAGIC QUOTA file
3073 * and return a valid FID.
3074 *
3075 * w2k close this file directly after openening xp
3076 * also tries a QUERY_FILE_INFO on the file and then
3077 * close it
3078 */
3079 status = open_fake_file(conn, req->vuid,
3080 fake_file_type, fname,
3081 access_mask, &fsp);
3082 if (!NT_STATUS_IS_OK(status)) {
3083 goto fail;
3084 }
3085
3086 ZERO_STRUCT(sbuf);
3087 goto done;
3088 }
3089
3090 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3091 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3092 goto fail;
3093 }
3094 }
3095
3096 if ((req != NULL) && (req->flags2 & FLAGS2_DFS_PATHNAMES)) {
3097 char *resolved_fname;
3098
3099 status = resolve_dfspath(talloc_tos(), conn, true, fname,
3100 &resolved_fname);
3101
3102 if (!NT_STATUS_IS_OK(status)) {
3103 /*
3104 * For PATH_NOT_COVERED we had
3105 * reply_botherror(req, NT_STATUS_PATH_NOT_COVERED,
3106 * ERRSRV, ERRbadpath);
3107 * Need to fix in callers
3108 */
3109 goto fail;
3110 }
3111 fname = resolved_fname;
3112 }
3113
3114 /*
3115 * Check if POSIX semantics are wanted.
3116 */
3117
3118 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3119 case_state = set_posix_case_semantics(talloc_tos(), conn);
3120 file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
3121 }
3122
3123 {
3124 char *converted_fname;
3125
3126 SET_STAT_INVALID(sbuf);
3127
3128 status = unix_convert(talloc_tos(), conn, fname, False,
3129 &converted_fname, NULL, &sbuf);
3130 if (!NT_STATUS_IS_OK(status)) {
3131 goto fail;
3132 }
3133 fname = converted_fname;
3134 }
3135
3136 TALLOC_FREE(case_state);
3137
3138 /* All file access must go through check_name() */
3139
3140 status = check_name(conn, fname);
3141 if (!NT_STATUS_IS_OK(status)) {
3142 goto fail;
3143 }
3144
3145 status = create_file_unixpath(
3146 conn, req, fname, access_mask, share_access,
3147 create_disposition, create_options, file_attributes,
3148 oplock_request, allocation_size, sd, ea_list,
3149 &fsp, &info, &sbuf);
3150
3151 if (!NT_STATUS_IS_OK(status)) {
3152 goto fail;
3153 }
3154
3155 done:
3156 DEBUG(10, ("create_file: info=%d\n", info));
3157
3158 *result = fsp;
3159 if (pinfo != NULL) {
3160 *pinfo = info;
3161 }
3162 if (psbuf != NULL) {
3163 *psbuf = sbuf;
3164 }
3165 return NT_STATUS_OK;
3166
3167 fail:
3168 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3169
3170 if (fsp != NULL) {
3171 close_file(fsp, ERROR_CLOSE);
3172 fsp = NULL;
3173 }
3174 return status;
3175 }