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add a test for a LSA lookupnames with a NULL string
[Samba/gbeck.git] / source3 / smbd / open.c
blobad024a58efa5f6daec71fae79cd8aabf61a360ee
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 Open a file with a share mode.
1129 ****************************************************************************/
1130
1131 NTSTATUS open_file_ntcreate(connection_struct *conn,
1132 struct smb_request *req,
1133 const char *fname,
1134 SMB_STRUCT_STAT *psbuf,
1135 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1136 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1137 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1138 uint32 create_options, /* options such as delete on close. */
1139 uint32 new_dos_attributes, /* attributes used for new file. */
1140 int oplock_request, /* internal Samba oplock codes. */
1141 /* Information (FILE_EXISTS etc.) */
1142 int *pinfo,
1143 files_struct **result)
1144 {
1145 int flags=0;
1146 int flags2=0;
1147 bool file_existed = VALID_STAT(*psbuf);
1148 bool def_acl = False;
1149 bool posix_open = False;
1150 bool new_file_created = False;
1151 struct file_id id;
1152 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1153 files_struct *fsp = NULL;
1154 mode_t new_unx_mode = (mode_t)0;
1155 mode_t unx_mode = (mode_t)0;
1156 int info;
1157 uint32 existing_dos_attributes = 0;
1158 struct pending_message_list *pml = NULL;
1159 struct timeval request_time = timeval_zero();
1160 struct share_mode_lock *lck = NULL;
1161 uint32 open_access_mask = access_mask;
1162 NTSTATUS status;
1163 int ret_flock;
1164 char *parent_dir;
1165 const char *newname;
1166
1167 ZERO_STRUCT(id);
1168
1169 if (conn->printer) {
1170 /*
1171 * Printers are handled completely differently.
1172 * Most of the passed parameters are ignored.
1173 */
1174
1175 if (pinfo) {
1176 *pinfo = FILE_WAS_CREATED;
1177 }
1178
1179 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n", fname));
1180
1181 return print_fsp_open(conn, fname, req->vuid, result);
1182 }
1183
1184 if (!parent_dirname_talloc(talloc_tos(), fname, &parent_dir,
1185 &newname)) {
1186 return NT_STATUS_NO_MEMORY;
1187 }
1188
1189 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1190 posix_open = True;
1191 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1192 new_dos_attributes = 0;
1193 } else {
1194 /* We add aARCH to this as this mode is only used if the file is
1195 * created new. */
1196 unx_mode = unix_mode(conn, new_dos_attributes | aARCH, fname,
1197 parent_dir);
1198 }
1199
1200 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1201 "access_mask=0x%x share_access=0x%x "
1202 "create_disposition = 0x%x create_options=0x%x "
1203 "unix mode=0%o oplock_request=%d\n",
1204 fname, new_dos_attributes, access_mask, share_access,
1205 create_disposition, create_options, unx_mode,
1206 oplock_request));
1207
1208 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1209 DEBUG(0, ("No smb request but not an internal only open!\n"));
1210 return NT_STATUS_INTERNAL_ERROR;
1211 }
1212
1213 /*
1214 * Only non-internal opens can be deferred at all
1215 */
1216
1217 if ((req != NULL)
1218 && ((pml = get_open_deferred_message(req->mid)) != NULL)) {
1219 struct deferred_open_record *state =
1220 (struct deferred_open_record *)pml->private_data.data;
1221
1222 /* Remember the absolute time of the original
1223 request with this mid. We'll use it later to
1224 see if this has timed out. */
1225
1226 request_time = pml->request_time;
1227
1228 /* Remove the deferred open entry under lock. */
1229 lck = get_share_mode_lock(talloc_tos(), state->id, NULL, NULL,
1230 NULL);
1231 if (lck == NULL) {
1232 DEBUG(0, ("could not get share mode lock\n"));
1233 } else {
1234 del_deferred_open_entry(lck, req->mid);
1235 TALLOC_FREE(lck);
1236 }
1237
1238 /* Ensure we don't reprocess this message. */
1239 remove_deferred_open_smb_message(req->mid);
1240 }
1241
1242 status = check_name(conn, fname);
1243 if (!NT_STATUS_IS_OK(status)) {
1244 return status;
1245 }
1246
1247 if (!posix_open) {
1248 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1249 if (file_existed) {
1250 existing_dos_attributes = dos_mode(conn, fname, psbuf);
1251 }
1252 }
1253
1254 /* ignore any oplock requests if oplocks are disabled */
1255 if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break ||
1256 IS_VETO_OPLOCK_PATH(conn, fname)) {
1257 /* Mask off everything except the private Samba bits. */
1258 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1259 }
1260
1261 /* this is for OS/2 long file names - say we don't support them */
1262 if (!lp_posix_pathnames() && strstr(fname,".+,;=[].")) {
1263 /* OS/2 Workplace shell fix may be main code stream in a later
1264 * release. */
1265 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1266 "supported.\n"));
1267 if (use_nt_status()) {
1268 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1269 }
1270 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1271 }
1272
1273 switch( create_disposition ) {
1274 /*
1275 * Currently we're using FILE_SUPERSEDE as the same as
1276 * FILE_OVERWRITE_IF but they really are
1277 * different. FILE_SUPERSEDE deletes an existing file
1278 * (requiring delete access) then recreates it.
1279 */
1280 case FILE_SUPERSEDE:
1281 /* If file exists replace/overwrite. If file doesn't
1282 * exist create. */
1283 flags2 |= (O_CREAT | O_TRUNC);
1284 break;
1285
1286 case FILE_OVERWRITE_IF:
1287 /* If file exists replace/overwrite. If file doesn't
1288 * exist create. */
1289 flags2 |= (O_CREAT | O_TRUNC);
1290 break;
1291
1292 case FILE_OPEN:
1293 /* If file exists open. If file doesn't exist error. */
1294 if (!file_existed) {
1295 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1296 "requested for file %s and file "
1297 "doesn't exist.\n", fname ));
1298 errno = ENOENT;
1299 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1300 }
1301 break;
1302
1303 case FILE_OVERWRITE:
1304 /* If file exists overwrite. If file doesn't exist
1305 * error. */
1306 if (!file_existed) {
1307 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1308 "requested for file %s and file "
1309 "doesn't exist.\n", fname ));
1310 errno = ENOENT;
1311 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1312 }
1313 flags2 |= O_TRUNC;
1314 break;
1315
1316 case FILE_CREATE:
1317 /* If file exists error. If file doesn't exist
1318 * create. */
1319 if (file_existed) {
1320 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1321 "requested for file %s and file "
1322 "already exists.\n", fname ));
1323 if (S_ISDIR(psbuf->st_mode)) {
1324 errno = EISDIR;
1325 } else {
1326 errno = EEXIST;
1327 }
1328 return map_nt_error_from_unix(errno);
1329 }
1330 flags2 |= (O_CREAT|O_EXCL);
1331 break;
1332
1333 case FILE_OPEN_IF:
1334 /* If file exists open. If file doesn't exist
1335 * create. */
1336 flags2 |= O_CREAT;
1337 break;
1338
1339 default:
1340 return NT_STATUS_INVALID_PARAMETER;
1341 }
1342
1343 /* We only care about matching attributes on file exists and
1344 * overwrite. */
1345
1346 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1347 (create_disposition == FILE_OVERWRITE_IF))) {
1348 if (!open_match_attributes(conn, fname,
1349 existing_dos_attributes,
1350 new_dos_attributes, psbuf->st_mode,
1351 unx_mode, &new_unx_mode)) {
1352 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1353 "for file %s (%x %x) (0%o, 0%o)\n",
1354 fname, existing_dos_attributes,
1355 new_dos_attributes,
1356 (unsigned int)psbuf->st_mode,
1357 (unsigned int)unx_mode ));
1358 errno = EACCES;
1359 return NT_STATUS_ACCESS_DENIED;
1360 }
1361 }
1362
1363 /* This is a nasty hack - must fix... JRA. */
1364 if (access_mask == MAXIMUM_ALLOWED_ACCESS) {
1365 open_access_mask = access_mask = FILE_GENERIC_ALL;
1366 }
1367
1368 /*
1369 * Convert GENERIC bits to specific bits.
1370 */
1371
1372 se_map_generic(&access_mask, &file_generic_mapping);
1373 open_access_mask = access_mask;
1374
1375 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1376 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1377 }
1378
1379 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1380 "access_mask=0x%x\n", fname, access_mask ));
1381
1382 /*
1383 * Note that we ignore the append flag as append does not
1384 * mean the same thing under DOS and Unix.
1385 */
1386
1387 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1388 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1389 /* DENY_DOS opens are always underlying read-write on the
1390 file handle, no matter what the requested access mask
1391 says. */
1392 if ((create_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1393 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1394 flags = O_RDWR;
1395 } else {
1396 flags = O_WRONLY;
1397 }
1398 } else {
1399 flags = O_RDONLY;
1400 }
1401
1402 /*
1403 * Currently we only look at FILE_WRITE_THROUGH for create options.
1404 */
1405
1406 #if defined(O_SYNC)
1407 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1408 flags2 |= O_SYNC;
1409 }
1410 #endif /* O_SYNC */
1411
1412 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1413 flags2 |= O_APPEND;
1414 }
1415
1416 if (!posix_open && !CAN_WRITE(conn)) {
1417 /*
1418 * We should really return a permission denied error if either
1419 * O_CREAT or O_TRUNC are set, but for compatibility with
1420 * older versions of Samba we just AND them out.
1421 */
1422 flags2 &= ~(O_CREAT|O_TRUNC);
1423 }
1424
1425 /*
1426 * Ensure we can't write on a read-only share or file.
1427 */
1428
1429 if (flags != O_RDONLY && file_existed &&
1430 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1431 DEBUG(5,("open_file_ntcreate: write access requested for "
1432 "file %s on read only %s\n",
1433 fname, !CAN_WRITE(conn) ? "share" : "file" ));
1434 errno = EACCES;
1435 return NT_STATUS_ACCESS_DENIED;
1436 }
1437
1438 status = file_new(conn, &fsp);
1439 if(!NT_STATUS_IS_OK(status)) {
1440 return status;
1441 }
1442
1443 fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
1444 fsp->share_access = share_access;
1445 fsp->fh->private_options = create_options;
1446 fsp->access_mask = open_access_mask; /* We change this to the
1447 * requested access_mask after
1448 * the open is done. */
1449 fsp->posix_open = posix_open;
1450
1451 /* Ensure no SAMBA_PRIVATE bits can be set. */
1452 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1453
1454 if (timeval_is_zero(&request_time)) {
1455 request_time = fsp->open_time;
1456 }
1457
1458 if (file_existed) {
1459 struct timespec old_write_time = get_mtimespec(psbuf);
1460 id = vfs_file_id_from_sbuf(conn, psbuf);
1461
1462 lck = get_share_mode_lock(talloc_tos(), id,
1463 conn->connectpath,
1464 fname, &old_write_time);
1465
1466 if (lck == NULL) {
1467 file_free(fsp);
1468 DEBUG(0, ("Could not get share mode lock\n"));
1469 return NT_STATUS_SHARING_VIOLATION;
1470 }
1471
1472 /* First pass - send break only on batch oplocks. */
1473 if ((req != NULL)
1474 && delay_for_oplocks(lck, fsp, req->mid, 1,
1475 oplock_request)) {
1476 schedule_defer_open(lck, request_time, req);
1477 TALLOC_FREE(lck);
1478 file_free(fsp);
1479 return NT_STATUS_SHARING_VIOLATION;
1480 }
1481
1482 /* Use the client requested access mask here, not the one we
1483 * open with. */
1484 status = open_mode_check(conn, fname, lck,
1485 access_mask, share_access,
1486 create_options, &file_existed);
1487
1488 if (NT_STATUS_IS_OK(status)) {
1489 /* We might be going to allow this open. Check oplock
1490 * status again. */
1491 /* Second pass - send break for both batch or
1492 * exclusive oplocks. */
1493 if ((req != NULL)
1494 && delay_for_oplocks(lck, fsp, req->mid, 2,
1495 oplock_request)) {
1496 schedule_defer_open(lck, request_time, req);
1497 TALLOC_FREE(lck);
1498 file_free(fsp);
1499 return NT_STATUS_SHARING_VIOLATION;
1500 }
1501 }
1502
1503 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1504 /* DELETE_PENDING is not deferred for a second */
1505 TALLOC_FREE(lck);
1506 file_free(fsp);
1507 return status;
1508 }
1509
1510 if (!NT_STATUS_IS_OK(status)) {
1511 uint32 can_access_mask;
1512 bool can_access = True;
1513
1514 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1515
1516 /* Check if this can be done with the deny_dos and fcb
1517 * calls. */
1518 if (create_options &
1519 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1520 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1521 files_struct *fsp_dup;
1522
1523 if (req == NULL) {
1524 DEBUG(0, ("DOS open without an SMB "
1525 "request!\n"));
1526 TALLOC_FREE(lck);
1527 file_free(fsp);
1528 return NT_STATUS_INTERNAL_ERROR;
1529 }
1530
1531 /* Use the client requested access mask here,
1532 * not the one we open with. */
1533 fsp_dup = fcb_or_dos_open(conn, fname, id,
1534 req->smbpid,
1535 req->vuid,
1536 access_mask,
1537 share_access,
1538 create_options);
1539
1540 if (fsp_dup) {
1541 TALLOC_FREE(lck);
1542 file_free(fsp);
1543 if (pinfo) {
1544 *pinfo = FILE_WAS_OPENED;
1545 }
1546 conn->num_files_open++;
1547 *result = fsp_dup;
1548 return NT_STATUS_OK;
1549 }
1550 }
1551
1552 /*
1553 * This next line is a subtlety we need for
1554 * MS-Access. If a file open will fail due to share
1555 * permissions and also for security (access) reasons,
1556 * we need to return the access failed error, not the
1557 * share error. We can't open the file due to kernel
1558 * oplock deadlock (it's possible we failed above on
1559 * the open_mode_check()) so use a userspace check.
1560 */
1561
1562 if (flags & O_RDWR) {
1563 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1564 } else if (flags & O_WRONLY) {
1565 can_access_mask = FILE_WRITE_DATA;
1566 } else {
1567 can_access_mask = FILE_READ_DATA;
1568 }
1569
1570 if (((can_access_mask & FILE_WRITE_DATA) && !CAN_WRITE(conn)) ||
1571 !can_access_file_data(conn,fname,psbuf,can_access_mask)) {
1572 can_access = False;
1573 }
1574
1575 /*
1576 * If we're returning a share violation, ensure we
1577 * cope with the braindead 1 second delay.
1578 */
1579
1580 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1581 lp_defer_sharing_violations()) {
1582 struct timeval timeout;
1583 struct deferred_open_record state;
1584 int timeout_usecs;
1585
1586 /* this is a hack to speed up torture tests
1587 in 'make test' */
1588 timeout_usecs = lp_parm_int(SNUM(conn),
1589 "smbd","sharedelay",
1590 SHARING_VIOLATION_USEC_WAIT);
1591
1592 /* This is a relative time, added to the absolute
1593 request_time value to get the absolute timeout time.
1594 Note that if this is the second or greater time we enter
1595 this codepath for this particular request mid then
1596 request_time is left as the absolute time of the *first*
1597 time this request mid was processed. This is what allows
1598 the request to eventually time out. */
1599
1600 timeout = timeval_set(0, timeout_usecs);
1601
1602 /* Nothing actually uses state.delayed_for_oplocks
1603 but it's handy to differentiate in debug messages
1604 between a 30 second delay due to oplock break, and
1605 a 1 second delay for share mode conflicts. */
1606
1607 state.delayed_for_oplocks = False;
1608 state.id = id;
1609
1610 if ((req != NULL)
1611 && !request_timed_out(request_time,
1612 timeout)) {
1613 defer_open(lck, request_time, timeout,
1614 req, &state);
1615 }
1616 }
1617
1618 TALLOC_FREE(lck);
1619 if (can_access) {
1620 /*
1621 * We have detected a sharing violation here
1622 * so return the correct error code
1623 */
1624 status = NT_STATUS_SHARING_VIOLATION;
1625 } else {
1626 status = NT_STATUS_ACCESS_DENIED;
1627 }
1628 file_free(fsp);
1629 return status;
1630 }
1631
1632 /*
1633 * We exit this block with the share entry *locked*.....
1634 */
1635 }
1636
1637 SMB_ASSERT(!file_existed || (lck != NULL));
1638
1639 /*
1640 * Ensure we pay attention to default ACLs on directories if required.
1641 */
1642
1643 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1644 (def_acl = directory_has_default_acl(conn, parent_dir))) {
1645 unx_mode = 0777;
1646 }
1647
1648 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1649 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1650 (unsigned int)flags, (unsigned int)flags2,
1651 (unsigned int)unx_mode, (unsigned int)access_mask,
1652 (unsigned int)open_access_mask));
1653
1654 /*
1655 * open_file strips any O_TRUNC flags itself.
1656 */
1657
1658 fsp_open = open_file(fsp, conn, req, parent_dir, newname, fname, psbuf,
1659 flags|flags2, unx_mode, access_mask,
1660 open_access_mask);
1661
1662 if (!NT_STATUS_IS_OK(fsp_open)) {
1663 if (lck != NULL) {
1664 TALLOC_FREE(lck);
1665 }
1666 file_free(fsp);
1667 return fsp_open;
1668 }
1669
1670 if (!file_existed) {
1671 struct timespec old_write_time = get_mtimespec(psbuf);
1672 /*
1673 * Deal with the race condition where two smbd's detect the
1674 * file doesn't exist and do the create at the same time. One
1675 * of them will win and set a share mode, the other (ie. this
1676 * one) should check if the requested share mode for this
1677 * create is allowed.
1678 */
1679
1680 /*
1681 * Now the file exists and fsp is successfully opened,
1682 * fsp->dev and fsp->inode are valid and should replace the
1683 * dev=0,inode=0 from a non existent file. Spotted by
1684 * Nadav Danieli <nadavd@exanet.com>. JRA.
1685 */
1686
1687 id = fsp->file_id;
1688
1689 lck = get_share_mode_lock(talloc_tos(), id,
1690 conn->connectpath,
1691 fname, &old_write_time);
1692
1693 if (lck == NULL) {
1694 DEBUG(0, ("open_file_ntcreate: Could not get share "
1695 "mode lock for %s\n", fname));
1696 fd_close(fsp);
1697 file_free(fsp);
1698 return NT_STATUS_SHARING_VIOLATION;
1699 }
1700
1701 /* First pass - send break only on batch oplocks. */
1702 if ((req != NULL)
1703 && delay_for_oplocks(lck, fsp, req->mid, 1,
1704 oplock_request)) {
1705 schedule_defer_open(lck, request_time, req);
1706 TALLOC_FREE(lck);
1707 fd_close(fsp);
1708 file_free(fsp);
1709 return NT_STATUS_SHARING_VIOLATION;
1710 }
1711
1712 status = open_mode_check(conn, fname, lck,
1713 access_mask, share_access,
1714 create_options, &file_existed);
1715
1716 if (NT_STATUS_IS_OK(status)) {
1717 /* We might be going to allow this open. Check oplock
1718 * status again. */
1719 /* Second pass - send break for both batch or
1720 * exclusive oplocks. */
1721 if ((req != NULL)
1722 && delay_for_oplocks(lck, fsp, req->mid, 2,
1723 oplock_request)) {
1724 schedule_defer_open(lck, request_time, req);
1725 TALLOC_FREE(lck);
1726 fd_close(fsp);
1727 file_free(fsp);
1728 return NT_STATUS_SHARING_VIOLATION;
1729 }
1730 }
1731
1732 if (!NT_STATUS_IS_OK(status)) {
1733 struct deferred_open_record state;
1734
1735 fd_close(fsp);
1736 file_free(fsp);
1737
1738 state.delayed_for_oplocks = False;
1739 state.id = id;
1740
1741 /* Do it all over again immediately. In the second
1742 * round we will find that the file existed and handle
1743 * the DELETE_PENDING and FCB cases correctly. No need
1744 * to duplicate the code here. Essentially this is a
1745 * "goto top of this function", but don't tell
1746 * anybody... */
1747
1748 if (req != NULL) {
1749 defer_open(lck, request_time, timeval_zero(),
1750 req, &state);
1751 }
1752 TALLOC_FREE(lck);
1753 return status;
1754 }
1755
1756 /*
1757 * We exit this block with the share entry *locked*.....
1758 */
1759
1760 }
1761
1762 SMB_ASSERT(lck != NULL);
1763
1764 /* note that we ignore failure for the following. It is
1765 basically a hack for NFS, and NFS will never set one of
1766 these only read them. Nobody but Samba can ever set a deny
1767 mode and we have already checked our more authoritative
1768 locking database for permission to set this deny mode. If
1769 the kernel refuses the operations then the kernel is wrong.
1770 note that GPFS supports it as well - jmcd */
1771
1772 if (fsp->fh->fd != -1) {
1773 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access);
1774 if(ret_flock == -1 ){
1775
1776 TALLOC_FREE(lck);
1777 fd_close(fsp);
1778 file_free(fsp);
1779
1780 return NT_STATUS_SHARING_VIOLATION;
1781 }
1782 }
1783
1784 /*
1785 * At this point onwards, we can guarentee that the share entry
1786 * is locked, whether we created the file or not, and that the
1787 * deny mode is compatible with all current opens.
1788 */
1789
1790 /*
1791 * If requested, truncate the file.
1792 */
1793
1794 if (flags2&O_TRUNC) {
1795 /*
1796 * We are modifing the file after open - update the stat
1797 * struct..
1798 */
1799 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
1800 (SMB_VFS_FSTAT(fsp, psbuf)==-1)) {
1801 status = map_nt_error_from_unix(errno);
1802 TALLOC_FREE(lck);
1803 fd_close(fsp);
1804 file_free(fsp);
1805 return status;
1806 }
1807 }
1808
1809 /* Record the options we were opened with. */
1810 fsp->share_access = share_access;
1811 fsp->fh->private_options = create_options;
1812 fsp->access_mask = access_mask;
1813
1814 if (file_existed) {
1815 /* stat opens on existing files don't get oplocks. */
1816 if (is_stat_open(open_access_mask)) {
1817 fsp->oplock_type = NO_OPLOCK;
1818 }
1819
1820 if (!(flags2 & O_TRUNC)) {
1821 info = FILE_WAS_OPENED;
1822 } else {
1823 info = FILE_WAS_OVERWRITTEN;
1824 }
1825 } else {
1826 info = FILE_WAS_CREATED;
1827 }
1828
1829 if (pinfo) {
1830 *pinfo = info;
1831 }
1832
1833 /*
1834 * Setup the oplock info in both the shared memory and
1835 * file structs.
1836 */
1837
1838 if ((fsp->oplock_type != NO_OPLOCK) &&
1839 (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK)) {
1840 if (!set_file_oplock(fsp, fsp->oplock_type)) {
1841 /* Could not get the kernel oplock */
1842 fsp->oplock_type = NO_OPLOCK;
1843 }
1844 }
1845
1846 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
1847 new_file_created = True;
1848 }
1849
1850 set_share_mode(lck, fsp, conn->server_info->utok.uid, 0,
1851 fsp->oplock_type, new_file_created);
1852
1853 /* Handle strange delete on close create semantics. */
1854 if ((create_options & FILE_DELETE_ON_CLOSE)
1855 && (((conn->fs_capabilities & FILE_NAMED_STREAMS)
1856 && is_ntfs_stream_name(fname))
1857 || can_set_initial_delete_on_close(lck))) {
1858 status = can_set_delete_on_close(fsp, True, new_dos_attributes);
1859
1860 if (!NT_STATUS_IS_OK(status)) {
1861 /* Remember to delete the mode we just added. */
1862 del_share_mode(lck, fsp);
1863 TALLOC_FREE(lck);
1864 fd_close(fsp);
1865 file_free(fsp);
1866 return status;
1867 }
1868 /* Note that here we set the *inital* delete on close flag,
1869 not the regular one. The magic gets handled in close. */
1870 fsp->initial_delete_on_close = True;
1871 }
1872
1873 if (new_file_created) {
1874 /* Files should be initially set as archive */
1875 if (lp_map_archive(SNUM(conn)) ||
1876 lp_store_dos_attributes(SNUM(conn))) {
1877 if (!posix_open) {
1878 SMB_STRUCT_STAT tmp_sbuf;
1879 SET_STAT_INVALID(tmp_sbuf);
1880 if (file_set_dosmode(
1881 conn, fname,
1882 new_dos_attributes | aARCH,
1883 &tmp_sbuf, parent_dir,
1884 true) == 0) {
1885 unx_mode = tmp_sbuf.st_mode;
1886 }
1887 }
1888 }
1889 }
1890
1891 /*
1892 * Take care of inherited ACLs on created files - if default ACL not
1893 * selected.
1894 */
1895
1896 if (!posix_open && !file_existed && !def_acl) {
1897
1898 int saved_errno = errno; /* We might get ENOSYS in the next
1899 * call.. */
1900
1901 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
1902 errno == ENOSYS) {
1903 errno = saved_errno; /* Ignore ENOSYS */
1904 }
1905
1906 } else if (new_unx_mode) {
1907
1908 int ret = -1;
1909
1910 /* Attributes need changing. File already existed. */
1911
1912 {
1913 int saved_errno = errno; /* We might get ENOSYS in the
1914 * next call.. */
1915 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
1916
1917 if (ret == -1 && errno == ENOSYS) {
1918 errno = saved_errno; /* Ignore ENOSYS */
1919 } else {
1920 DEBUG(5, ("open_file_ntcreate: reset "
1921 "attributes of file %s to 0%o\n",
1922 fname, (unsigned int)new_unx_mode));
1923 ret = 0; /* Don't do the fchmod below. */
1924 }
1925 }
1926
1927 if ((ret == -1) &&
1928 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
1929 DEBUG(5, ("open_file_ntcreate: failed to reset "
1930 "attributes of file %s to 0%o\n",
1931 fname, (unsigned int)new_unx_mode));
1932 }
1933
1934 /* If this is a successful open, we must remove any deferred open
1935 * records. */
1936 if (req != NULL) {
1937 del_deferred_open_entry(lck, req->mid);
1938 }
1939 TALLOC_FREE(lck);
1940
1941 conn->num_files_open++;
1942
1943 *result = fsp;
1944 return NT_STATUS_OK;
1945 }
1946
1947 /****************************************************************************
1948 Open a file for for write to ensure that we can fchmod it.
1949 ****************************************************************************/
1950
1951 NTSTATUS open_file_fchmod(connection_struct *conn, const char *fname,
1952 SMB_STRUCT_STAT *psbuf, files_struct **result)
1953 {
1954 files_struct *fsp = NULL;
1955 NTSTATUS status;
1956
1957 if (!VALID_STAT(*psbuf)) {
1958 return NT_STATUS_INVALID_PARAMETER;
1959 }
1960
1961 status = file_new(conn, &fsp);
1962 if(!NT_STATUS_IS_OK(status)) {
1963 return status;
1964 }
1965
1966 /* note! we must use a non-zero desired access or we don't get
1967 a real file descriptor. Oh what a twisted web we weave. */
1968 status = open_file(fsp, conn, NULL, NULL, NULL, fname, psbuf, O_WRONLY,
1969 0, FILE_WRITE_DATA, FILE_WRITE_DATA);
1970
1971 /*
1972 * This is not a user visible file open.
1973 * Don't set a share mode and don't increment
1974 * the conn->num_files_open.
1975 */
1976
1977 if (!NT_STATUS_IS_OK(status)) {
1978 file_free(fsp);
1979 return status;
1980 }
1981
1982 *result = fsp;
1983 return NT_STATUS_OK;
1984 }
1985
1986 /****************************************************************************
1987 Close the fchmod file fd - ensure no locks are lost.
1988 ****************************************************************************/
1989
1990 NTSTATUS close_file_fchmod(files_struct *fsp)
1991 {
1992 NTSTATUS status = fd_close(fsp);
1993 file_free(fsp);
1994 return status;
1995 }
1996
1997 static NTSTATUS mkdir_internal(connection_struct *conn,
1998 const char *name,
1999 uint32 file_attributes,
2000 SMB_STRUCT_STAT *psbuf)
2001 {
2002 mode_t mode;
2003 char *parent_dir;
2004 const char *dirname;
2005 NTSTATUS status;
2006 bool posix_open = false;
2007
2008 if(!CAN_WRITE(conn)) {
2009 DEBUG(5,("mkdir_internal: failing create on read-only share "
2010 "%s\n", lp_servicename(SNUM(conn))));
2011 return NT_STATUS_ACCESS_DENIED;
2012 }
2013
2014 status = check_name(conn, name);
2015 if (!NT_STATUS_IS_OK(status)) {
2016 return status;
2017 }
2018
2019 if (!parent_dirname_talloc(talloc_tos(), name, &parent_dir,
2020 &dirname)) {
2021 return NT_STATUS_NO_MEMORY;
2022 }
2023
2024 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2025 posix_open = true;
2026 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2027 } else {
2028 mode = unix_mode(conn, aDIR, name, parent_dir);
2029 }
2030
2031 if (SMB_VFS_MKDIR(conn, name, mode) != 0) {
2032 return map_nt_error_from_unix(errno);
2033 }
2034
2035 /* Ensure we're checking for a symlink here.... */
2036 /* We don't want to get caught by a symlink racer. */
2037
2038 if (SMB_VFS_LSTAT(conn, name, psbuf) == -1) {
2039 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2040 name, strerror(errno)));
2041 return map_nt_error_from_unix(errno);
2042 }
2043
2044 if (!S_ISDIR(psbuf->st_mode)) {
2045 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2046 name));
2047 return NT_STATUS_ACCESS_DENIED;
2048 }
2049
2050 if (lp_store_dos_attributes(SNUM(conn))) {
2051 if (!posix_open) {
2052 file_set_dosmode(conn, name,
2053 file_attributes | aDIR, NULL,
2054 parent_dir,
2055 true);
2056 }
2057 }
2058
2059 if (lp_inherit_perms(SNUM(conn))) {
2060 inherit_access_posix_acl(conn, parent_dir, name, mode);
2061 }
2062
2063 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2064 /*
2065 * Check if high bits should have been set,
2066 * then (if bits are missing): add them.
2067 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2068 * dir.
2069 */
2070 if (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO) && (mode & ~psbuf->st_mode)) {
2071 SMB_VFS_CHMOD(conn, name,
2072 psbuf->st_mode | (mode & ~psbuf->st_mode));
2073 }
2074 }
2075
2076 /* Change the owner if required. */
2077 if (lp_inherit_owner(SNUM(conn))) {
2078 change_dir_owner_to_parent(conn, parent_dir, name, psbuf);
2079 }
2080
2081 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2082 name);
2083
2084 return NT_STATUS_OK;
2085 }
2086
2087 /****************************************************************************
2088 Open a directory from an NT SMB call.
2089 ****************************************************************************/
2090
2091 NTSTATUS open_directory(connection_struct *conn,
2092 struct smb_request *req,
2093 const char *fname,
2094 SMB_STRUCT_STAT *psbuf,
2095 uint32 access_mask,
2096 uint32 share_access,
2097 uint32 create_disposition,
2098 uint32 create_options,
2099 uint32 file_attributes,
2100 int *pinfo,
2101 files_struct **result)
2102 {
2103 files_struct *fsp = NULL;
2104 bool dir_existed = VALID_STAT(*psbuf) ? True : False;
2105 struct share_mode_lock *lck = NULL;
2106 NTSTATUS status;
2107 struct timespec mtimespec;
2108 int info = 0;
2109
2110 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2111 "share_access = 0x%x create_options = 0x%x, "
2112 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2113 fname,
2114 (unsigned int)access_mask,
2115 (unsigned int)share_access,
2116 (unsigned int)create_options,
2117 (unsigned int)create_disposition,
2118 (unsigned int)file_attributes));
2119
2120 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2121 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2122 is_ntfs_stream_name(fname)) {
2123 DEBUG(2, ("open_directory: %s is a stream name!\n", fname));
2124 return NT_STATUS_NOT_A_DIRECTORY;
2125 }
2126
2127 switch( create_disposition ) {
2128 case FILE_OPEN:
2129
2130 info = FILE_WAS_OPENED;
2131
2132 /*
2133 * We want to follow symlinks here.
2134 */
2135
2136 if (SMB_VFS_STAT(conn, fname, psbuf) != 0) {
2137 return map_nt_error_from_unix(errno);
2138 }
2139
2140 break;
2141
2142 case FILE_CREATE:
2143
2144 /* If directory exists error. If directory doesn't
2145 * exist create. */
2146
2147 status = mkdir_internal(conn,
2148 fname,
2149 file_attributes,
2150 psbuf);
2151
2152 if (!NT_STATUS_IS_OK(status)) {
2153 DEBUG(2, ("open_directory: unable to create "
2154 "%s. Error was %s\n", fname,
2155 nt_errstr(status)));
2156 return status;
2157 }
2158
2159 info = FILE_WAS_CREATED;
2160 break;
2161
2162 case FILE_OPEN_IF:
2163 /*
2164 * If directory exists open. If directory doesn't
2165 * exist create.
2166 */
2167
2168 status = mkdir_internal(conn,
2169 fname,
2170 file_attributes,
2171 psbuf);
2172
2173 if (NT_STATUS_IS_OK(status)) {
2174 info = FILE_WAS_CREATED;
2175 }
2176
2177 if (NT_STATUS_EQUAL(status,
2178 NT_STATUS_OBJECT_NAME_COLLISION)) {
2179 info = FILE_WAS_OPENED;
2180 status = NT_STATUS_OK;
2181 }
2182
2183 break;
2184
2185 case FILE_SUPERSEDE:
2186 case FILE_OVERWRITE:
2187 case FILE_OVERWRITE_IF:
2188 default:
2189 DEBUG(5,("open_directory: invalid create_disposition "
2190 "0x%x for directory %s\n",
2191 (unsigned int)create_disposition, fname));
2192 return NT_STATUS_INVALID_PARAMETER;
2193 }
2194
2195 if(!S_ISDIR(psbuf->st_mode)) {
2196 DEBUG(5,("open_directory: %s is not a directory !\n",
2197 fname ));
2198 return NT_STATUS_NOT_A_DIRECTORY;
2199 }
2200
2201 status = file_new(conn, &fsp);
2202 if(!NT_STATUS_IS_OK(status)) {
2203 return status;
2204 }
2205
2206 /*
2207 * Setup the files_struct for it.
2208 */
2209
2210 fsp->mode = psbuf->st_mode;
2211 fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
2212 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2213 fsp->file_pid = req ? req->smbpid : 0;
2214 fsp->can_lock = False;
2215 fsp->can_read = False;
2216 fsp->can_write = False;
2217
2218 fsp->share_access = share_access;
2219 fsp->fh->private_options = create_options;
2220 fsp->access_mask = access_mask;
2221
2222 fsp->print_file = False;
2223 fsp->modified = False;
2224 fsp->oplock_type = NO_OPLOCK;
2225 fsp->sent_oplock_break = NO_BREAK_SENT;
2226 fsp->is_directory = True;
2227 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2228
2229 string_set(&fsp->fsp_name,fname);
2230
2231 mtimespec = get_mtimespec(psbuf);
2232
2233 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2234 conn->connectpath,
2235 fname, &mtimespec);
2236
2237 if (lck == NULL) {
2238 DEBUG(0, ("open_directory: Could not get share mode lock for %s\n", fname));
2239 file_free(fsp);
2240 return NT_STATUS_SHARING_VIOLATION;
2241 }
2242
2243 status = open_mode_check(conn, fname, lck,
2244 access_mask, share_access,
2245 create_options, &dir_existed);
2246
2247 if (!NT_STATUS_IS_OK(status)) {
2248 TALLOC_FREE(lck);
2249 file_free(fsp);
2250 return status;
2251 }
2252
2253 set_share_mode(lck, fsp, conn->server_info->utok.uid, 0, NO_OPLOCK,
2254 True);
2255
2256 /* For directories the delete on close bit at open time seems
2257 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2258 if (create_options & FILE_DELETE_ON_CLOSE) {
2259 status = can_set_delete_on_close(fsp, True, 0);
2260 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2261 TALLOC_FREE(lck);
2262 file_free(fsp);
2263 return status;
2264 }
2265
2266 if (NT_STATUS_IS_OK(status)) {
2267 /* Note that here we set the *inital* delete on close flag,
2268 not the regular one. The magic gets handled in close. */
2269 fsp->initial_delete_on_close = True;
2270 }
2271 }
2272
2273 TALLOC_FREE(lck);
2274
2275 if (pinfo) {
2276 *pinfo = info;
2277 }
2278
2279 conn->num_files_open++;
2280
2281 *result = fsp;
2282 return NT_STATUS_OK;
2283 }
2284
2285 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req, const char *directory)
2286 {
2287 NTSTATUS status;
2288 SMB_STRUCT_STAT sbuf;
2289 files_struct *fsp;
2290
2291 SET_STAT_INVALID(sbuf);
2292
2293 status = open_directory(conn, req, directory, &sbuf,
2294 FILE_READ_ATTRIBUTES, /* Just a stat open */
2295 FILE_SHARE_NONE, /* Ignored for stat opens */
2296 FILE_CREATE,
2297 0,
2298 FILE_ATTRIBUTE_DIRECTORY,
2299 NULL,
2300 &fsp);
2301
2302 if (NT_STATUS_IS_OK(status)) {
2303 close_file(fsp, NORMAL_CLOSE);
2304 }
2305
2306 return status;
2307 }
2308
2309 /****************************************************************************
2310 Receive notification that one of our open files has been renamed by another
2311 smbd process.
2312 ****************************************************************************/
2313
2314 void msg_file_was_renamed(struct messaging_context *msg,
2315 void *private_data,
2316 uint32_t msg_type,
2317 struct server_id server_id,
2318 DATA_BLOB *data)
2319 {
2320 files_struct *fsp;
2321 char *frm = (char *)data->data;
2322 struct file_id id;
2323 const char *sharepath;
2324 const char *newname;
2325 size_t sp_len;
2326
2327 if (data->data == NULL
2328 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2329 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2330 (int)data->length));
2331 return;
2332 }
2333
2334 /* Unpack the message. */
2335 pull_file_id_16(frm, &id);
2336 sharepath = &frm[16];
2337 newname = sharepath + strlen(sharepath) + 1;
2338 sp_len = strlen(sharepath);
2339
2340 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2341 "file_id %s\n",
2342 sharepath, newname, file_id_string_tos(&id)));
2343
2344 for(fsp = file_find_di_first(id); fsp; fsp = file_find_di_next(fsp)) {
2345 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2346 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2347 fsp->fnum, fsp->fsp_name, newname ));
2348 string_set(&fsp->fsp_name, newname);
2349 } else {
2350 /* TODO. JRA. */
2351 /* Now we have the complete path we can work out if this is
2352 actually within this share and adjust newname accordingly. */
2353 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2354 "not sharepath %s) "
2355 "fnum %d from %s -> %s\n",
2356 fsp->conn->connectpath,
2357 sharepath,
2358 fsp->fnum,
2359 fsp->fsp_name,
2360 newname ));
2361 }
2362 }
2363 }
2364
2365 struct case_semantics_state {
2366 connection_struct *conn;
2367 bool case_sensitive;
2368 bool case_preserve;
2369 bool short_case_preserve;
2370 };
2371
2372 /****************************************************************************
2373 Restore case semantics.
2374 ****************************************************************************/
2375 static int restore_case_semantics(struct case_semantics_state *state)
2376 {
2377 state->conn->case_sensitive = state->case_sensitive;
2378 state->conn->case_preserve = state->case_preserve;
2379 state->conn->short_case_preserve = state->short_case_preserve;
2380 return 0;
2381 }
2382
2383 /****************************************************************************
2384 Save case semantics.
2385 ****************************************************************************/
2386 static struct case_semantics_state *set_posix_case_semantics(TALLOC_CTX *mem_ctx,
2387 connection_struct *conn)
2388 {
2389 struct case_semantics_state *result;
2390
2391 if (!(result = talloc(mem_ctx, struct case_semantics_state))) {
2392 DEBUG(0, ("talloc failed\n"));
2393 return NULL;
2394 }
2395
2396 result->conn = conn;
2397 result->case_sensitive = conn->case_sensitive;
2398 result->case_preserve = conn->case_preserve;
2399 result->short_case_preserve = conn->short_case_preserve;
2400
2401 /* Set to POSIX. */
2402 conn->case_sensitive = True;
2403 conn->case_preserve = True;
2404 conn->short_case_preserve = True;
2405
2406 talloc_set_destructor(result, restore_case_semantics);
2407
2408 return result;
2409 }
2410
2411 /*
2412 * If a main file is opened for delete, all streams need to be checked for
2413 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2414 * If that works, delete them all by setting the delete on close and close.
2415 */
2416
2417 static NTSTATUS open_streams_for_delete(connection_struct *conn,
2418 const char *fname)
2419 {
2420 struct stream_struct *stream_info;
2421 files_struct **streams;
2422 int i;
2423 unsigned int num_streams;
2424 TALLOC_CTX *frame = talloc_stackframe();
2425 NTSTATUS status;
2426
2427 status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
2428 &num_streams, &stream_info);
2429
2430 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2431 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2432 DEBUG(10, ("no streams around\n"));
2433 TALLOC_FREE(frame);
2434 return NT_STATUS_OK;
2435 }
2436
2437 if (!NT_STATUS_IS_OK(status)) {
2438 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
2439 nt_errstr(status)));
2440 goto fail;
2441 }
2442
2443 DEBUG(10, ("open_streams_for_delete found %d streams\n",
2444 num_streams));
2445
2446 if (num_streams == 0) {
2447 TALLOC_FREE(frame);
2448 return NT_STATUS_OK;
2449 }
2450
2451 streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
2452 if (streams == NULL) {
2453 DEBUG(0, ("talloc failed\n"));
2454 status = NT_STATUS_NO_MEMORY;
2455 goto fail;
2456 }
2457
2458 for (i=0; i<num_streams; i++) {
2459 char *streamname;
2460
2461 if (strequal(stream_info[i].name, "::$DATA")) {
2462 streams[i] = NULL;
2463 continue;
2464 }
2465
2466 streamname = talloc_asprintf(talloc_tos(), "%s%s", fname,
2467 stream_info[i].name);
2468
2469 if (streamname == NULL) {
2470 DEBUG(0, ("talloc_aprintf failed\n"));
2471 status = NT_STATUS_NO_MEMORY;
2472 goto fail;
2473 }
2474
2475 status = create_file_unixpath
2476 (conn, /* conn */
2477 NULL, /* req */
2478 streamname, /* fname */
2479 DELETE_ACCESS, /* access_mask */
2480 FILE_SHARE_READ | FILE_SHARE_WRITE
2481 | FILE_SHARE_DELETE, /* share_access */
2482 FILE_OPEN, /* create_disposition*/
2483 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* create_options */
2484 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
2485 0, /* oplock_request */
2486 0, /* allocation_size */
2487 NULL, /* sd */
2488 NULL, /* ea_list */
2489 &streams[i], /* result */
2490 NULL, /* pinfo */
2491 NULL); /* psbuf */
2492
2493 TALLOC_FREE(streamname);
2494
2495 if (!NT_STATUS_IS_OK(status)) {
2496 DEBUG(10, ("Could not open stream %s: %s\n",
2497 streamname, nt_errstr(status)));
2498 break;
2499 }
2500 }
2501
2502 /*
2503 * don't touch the variable "status" beyond this point :-)
2504 */
2505
2506 for (i -= 1 ; i >= 0; i--) {
2507 if (streams[i] == NULL) {
2508 continue;
2509 }
2510
2511 DEBUG(10, ("Closing stream # %d, %s\n", i,
2512 streams[i]->fsp_name));
2513 close_file(streams[i], NORMAL_CLOSE);
2514 }
2515
2516 fail:
2517 TALLOC_FREE(frame);
2518 return status;
2519 }
2520
2521 /*
2522 * Wrapper around open_file_ntcreate and open_directory
2523 */
2524
2525 NTSTATUS create_file_unixpath(connection_struct *conn,
2526 struct smb_request *req,
2527 const char *fname,
2528 uint32_t access_mask,
2529 uint32_t share_access,
2530 uint32_t create_disposition,
2531 uint32_t create_options,
2532 uint32_t file_attributes,
2533 uint32_t oplock_request,
2534 SMB_BIG_UINT allocation_size,
2535 struct security_descriptor *sd,
2536 struct ea_list *ea_list,
2537
2538 files_struct **result,
2539 int *pinfo,
2540 SMB_STRUCT_STAT *psbuf)
2541 {
2542 SMB_STRUCT_STAT sbuf;
2543 int info = FILE_WAS_OPENED;
2544 files_struct *base_fsp = NULL;
2545 files_struct *fsp = NULL;
2546 NTSTATUS status;
2547
2548 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
2549 "file_attributes = 0x%x, share_access = 0x%x, "
2550 "create_disposition = 0x%x create_options = 0x%x "
2551 "oplock_request = 0x%x ea_list = 0x%p, sd = 0x%p, "
2552 "fname = %s\n",
2553 (unsigned int)access_mask,
2554 (unsigned int)file_attributes,
2555 (unsigned int)share_access,
2556 (unsigned int)create_disposition,
2557 (unsigned int)create_options,
2558 (unsigned int)oplock_request,
2559 ea_list, sd, fname));
2560
2561 if (create_options & FILE_OPEN_BY_FILE_ID) {
2562 status = NT_STATUS_NOT_SUPPORTED;
2563 goto fail;
2564 }
2565
2566 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
2567 status = NT_STATUS_INVALID_PARAMETER;
2568 goto fail;
2569 }
2570
2571 if (req == NULL) {
2572 oplock_request |= INTERNAL_OPEN_ONLY;
2573 }
2574
2575 if (psbuf != NULL) {
2576 sbuf = *psbuf;
2577 }
2578 else {
2579 if (SMB_VFS_STAT(conn, fname, &sbuf) == -1) {
2580 SET_STAT_INVALID(sbuf);
2581 }
2582 }
2583
2584 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2585 && (access_mask & DELETE_ACCESS)
2586 && !is_ntfs_stream_name(fname)) {
2587 /*
2588 * We can't open a file with DELETE access if any of the
2589 * streams is open without FILE_SHARE_DELETE
2590 */
2591 status = open_streams_for_delete(conn, fname);
2592
2593 if (!NT_STATUS_IS_OK(status)) {
2594 goto fail;
2595 }
2596 }
2597
2598 /* This is the correct thing to do (check every time) but can_delete
2599 * is expensive (it may have to read the parent directory
2600 * permissions). So for now we're not doing it unless we have a strong
2601 * hint the client is really going to delete this file. If the client
2602 * is forcing FILE_CREATE let the filesystem take care of the
2603 * permissions. */
2604
2605 /* Setting FILE_SHARE_DELETE is the hint. */
2606
2607 if (lp_acl_check_permissions(SNUM(conn))
2608 && (create_disposition != FILE_CREATE)
2609 && (share_access & FILE_SHARE_DELETE)
2610 && (access_mask & DELETE_ACCESS)
2611 && (!can_delete_file_in_directory(conn, fname))) {
2612 status = NT_STATUS_ACCESS_DENIED;
2613 goto fail;
2614 }
2615
2616 #if 0
2617 /* We need to support SeSecurityPrivilege for this. */
2618 if ((access_mask & SEC_RIGHT_SYSTEM_SECURITY) &&
2619 !user_has_privileges(current_user.nt_user_token,
2620 &se_security)) {
2621 status = NT_STATUS_PRIVILEGE_NOT_HELD;
2622 goto fail;
2623 }
2624 #endif
2625
2626 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2627 && is_ntfs_stream_name(fname)
2628 && (!(create_options & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
2629 char *base;
2630 uint32 base_create_disposition;
2631
2632 if (create_options & FILE_DIRECTORY_FILE) {
2633 status = NT_STATUS_NOT_A_DIRECTORY;
2634 goto fail;
2635 }
2636
2637 status = split_ntfs_stream_name(talloc_tos(), fname,
2638 &base, NULL);
2639 if (!NT_STATUS_IS_OK(status)) {
2640 DEBUG(10, ("create_file_unixpath: "
2641 "split_ntfs_stream_name failed: %s\n",
2642 nt_errstr(status)));
2643 goto fail;
2644 }
2645
2646 SMB_ASSERT(!is_ntfs_stream_name(base)); /* paranoia.. */
2647
2648 switch (create_disposition) {
2649 case FILE_OPEN:
2650 base_create_disposition = FILE_OPEN;
2651 break;
2652 default:
2653 base_create_disposition = FILE_OPEN_IF;
2654 break;
2655 }
2656
2657 status = create_file_unixpath(conn, NULL, base, 0,
2658 FILE_SHARE_READ
2659 | FILE_SHARE_WRITE
2660 | FILE_SHARE_DELETE,
2661 base_create_disposition,
2662 0, 0, 0, 0, NULL, NULL,
2663 &base_fsp, NULL, NULL);
2664 if (!NT_STATUS_IS_OK(status)) {
2665 DEBUG(10, ("create_file_unixpath for base %s failed: "
2666 "%s\n", base, nt_errstr(status)));
2667 goto fail;
2668 }
2669 }
2670
2671 /*
2672 * If it's a request for a directory open, deal with it separately.
2673 */
2674
2675 if (create_options & FILE_DIRECTORY_FILE) {
2676
2677 if (create_options & FILE_NON_DIRECTORY_FILE) {
2678 status = NT_STATUS_INVALID_PARAMETER;
2679 goto fail;
2680 }
2681
2682 /* Can't open a temp directory. IFS kit test. */
2683 if (file_attributes & FILE_ATTRIBUTE_TEMPORARY) {
2684 status = NT_STATUS_INVALID_PARAMETER;
2685 goto fail;
2686 }
2687
2688 /*
2689 * We will get a create directory here if the Win32
2690 * app specified a security descriptor in the
2691 * CreateDirectory() call.
2692 */
2693
2694 oplock_request = 0;
2695 status = open_directory(
2696 conn, req, fname, &sbuf, access_mask, share_access,
2697 create_disposition, create_options, file_attributes,
2698 &info, &fsp);
2699 } else {
2700
2701 /*
2702 * Ordinary file case.
2703 */
2704
2705 status = open_file_ntcreate(
2706 conn, req, fname, &sbuf, access_mask, share_access,
2707 create_disposition, create_options, file_attributes,
2708 oplock_request, &info, &fsp);
2709
2710 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
2711
2712 /*
2713 * Fail the open if it was explicitly a non-directory
2714 * file.
2715 */
2716
2717 if (create_options & FILE_NON_DIRECTORY_FILE) {
2718 status = NT_STATUS_FILE_IS_A_DIRECTORY;
2719 goto fail;
2720 }
2721
2722 oplock_request = 0;
2723 status = open_directory(
2724 conn, req, fname, &sbuf, access_mask,
2725 share_access, create_disposition,
2726 create_options, file_attributes,
2727 &info, &fsp);
2728 }
2729 }
2730
2731 if (!NT_STATUS_IS_OK(status)) {
2732 goto fail;
2733 }
2734
2735 /*
2736 * According to the MS documentation, the only time the security
2737 * descriptor is applied to the opened file is iff we *created* the
2738 * file; an existing file stays the same.
2739 *
2740 * Also, it seems (from observation) that you can open the file with
2741 * any access mask but you can still write the sd. We need to override
2742 * the granted access before we call set_sd
2743 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
2744 */
2745
2746 if ((sd != NULL) && (info == FILE_WAS_CREATED)
2747 && lp_nt_acl_support(SNUM(conn))) {
2748
2749 uint32_t sec_info_sent = ALL_SECURITY_INFORMATION;
2750 uint32_t saved_access_mask = fsp->access_mask;
2751
2752 if (sd->owner_sid == NULL) {
2753 sec_info_sent &= ~OWNER_SECURITY_INFORMATION;
2754 }
2755 if (sd->group_sid == NULL) {
2756 sec_info_sent &= ~GROUP_SECURITY_INFORMATION;
2757 }
2758 if (sd->sacl == NULL) {
2759 sec_info_sent &= ~SACL_SECURITY_INFORMATION;
2760 }
2761 if (sd->dacl == NULL) {
2762 sec_info_sent &= ~DACL_SECURITY_INFORMATION;
2763 }
2764
2765 fsp->access_mask = FILE_GENERIC_ALL;
2766
2767 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
2768
2769 fsp->access_mask = saved_access_mask;
2770
2771 if (!NT_STATUS_IS_OK(status)) {
2772 goto fail;
2773 }
2774 }
2775
2776 if ((ea_list != NULL) && (info == FILE_WAS_CREATED)) {
2777 status = set_ea(conn, fsp, fname, ea_list);
2778 if (!NT_STATUS_IS_OK(status)) {
2779 goto fail;
2780 }
2781 }
2782
2783 if (!fsp->is_directory && S_ISDIR(sbuf.st_mode)) {
2784 status = NT_STATUS_ACCESS_DENIED;
2785 goto fail;
2786 }
2787
2788 /* Save the requested allocation size. */
2789 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
2790 if (allocation_size
2791 && (allocation_size > sbuf.st_size)) {
2792 fsp->initial_allocation_size = smb_roundup(
2793 fsp->conn, allocation_size);
2794 if (fsp->is_directory) {
2795 /* Can't set allocation size on a directory. */
2796 status = NT_STATUS_ACCESS_DENIED;
2797 goto fail;
2798 }
2799 if (vfs_allocate_file_space(
2800 fsp, fsp->initial_allocation_size) == -1) {
2801 status = NT_STATUS_DISK_FULL;
2802 goto fail;
2803 }
2804 } else {
2805 fsp->initial_allocation_size = smb_roundup(
2806 fsp->conn, (SMB_BIG_UINT)sbuf.st_size);
2807 }
2808 }
2809
2810 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
2811
2812 /*
2813 * Set fsp->base_fsp late enough that we can't "goto fail" anymore. In
2814 * the fail: branch we call close_file(fsp, ERROR_CLOSE) which would
2815 * also close fsp->base_fsp which we have to also do explicitly in
2816 * this routine here, as not in all "goto fail:" we have the fsp set
2817 * up already to be initialized with the base_fsp.
2818 */
2819
2820 fsp->base_fsp = base_fsp;
2821
2822 *result = fsp;
2823 if (pinfo != NULL) {
2824 *pinfo = info;
2825 }
2826 if (psbuf != NULL) {
2827 if ((fsp->fh == NULL) || (fsp->fh->fd == -1)) {
2828 *psbuf = sbuf;
2829 }
2830 else {
2831 SMB_VFS_FSTAT(fsp, psbuf);
2832 }
2833 }
2834 return NT_STATUS_OK;
2835
2836 fail:
2837 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
2838
2839 if (fsp != NULL) {
2840 close_file(fsp, ERROR_CLOSE);
2841 fsp = NULL;
2842 }
2843 if (base_fsp != NULL) {
2844 close_file(base_fsp, ERROR_CLOSE);
2845 base_fsp = NULL;
2846 }
2847 return status;
2848 }
2849
2850 NTSTATUS create_file(connection_struct *conn,
2851 struct smb_request *req,
2852 uint16_t root_dir_fid,
2853 const char *fname,
2854 uint32_t access_mask,
2855 uint32_t share_access,
2856 uint32_t create_disposition,
2857 uint32_t create_options,
2858 uint32_t file_attributes,
2859 uint32_t oplock_request,
2860 SMB_BIG_UINT allocation_size,
2861 struct security_descriptor *sd,
2862 struct ea_list *ea_list,
2863
2864 files_struct **result,
2865 int *pinfo,
2866 SMB_STRUCT_STAT *psbuf)
2867 {
2868 struct case_semantics_state *case_state = NULL;
2869 SMB_STRUCT_STAT sbuf;
2870 int info = FILE_WAS_OPENED;
2871 files_struct *fsp = NULL;
2872 NTSTATUS status;
2873
2874 DEBUG(10,("create_file: access_mask = 0x%x "
2875 "file_attributes = 0x%x, share_access = 0x%x, "
2876 "create_disposition = 0x%x create_options = 0x%x "
2877 "oplock_request = 0x%x "
2878 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
2879 "fname = %s\n",
2880 (unsigned int)access_mask,
2881 (unsigned int)file_attributes,
2882 (unsigned int)share_access,
2883 (unsigned int)create_disposition,
2884 (unsigned int)create_options,
2885 (unsigned int)oplock_request,
2886 (unsigned int)root_dir_fid,
2887 ea_list, sd, fname));
2888
2889 /*
2890 * Get the file name.
2891 */
2892
2893 if (root_dir_fid != 0) {
2894 /*
2895 * This filename is relative to a directory fid.
2896 */
2897 char *parent_fname = NULL;
2898 files_struct *dir_fsp = file_fsp(root_dir_fid);
2899
2900 if (dir_fsp == NULL) {
2901 status = NT_STATUS_INVALID_HANDLE;
2902 goto fail;
2903 }
2904
2905 if (!dir_fsp->is_directory) {
2906
2907 /*
2908 * Check to see if this is a mac fork of some kind.
2909 */
2910
2911 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2912 is_ntfs_stream_name(fname)) {
2913 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
2914 goto fail;
2915 }
2916
2917 /*
2918 we need to handle the case when we get a
2919 relative open relative to a file and the
2920 pathname is blank - this is a reopen!
2921 (hint from demyn plantenberg)
2922 */
2923
2924 status = NT_STATUS_INVALID_HANDLE;
2925 goto fail;
2926 }
2927
2928 if (ISDOT(dir_fsp->fsp_name)) {
2929 /*
2930 * We're at the toplevel dir, the final file name
2931 * must not contain ./, as this is filtered out
2932 * normally by srvstr_get_path and unix_convert
2933 * explicitly rejects paths containing ./.
2934 */
2935 parent_fname = talloc_strdup(talloc_tos(), "");
2936 if (parent_fname == NULL) {
2937 status = NT_STATUS_NO_MEMORY;
2938 goto fail;
2939 }
2940 } else {
2941 size_t dir_name_len = strlen(dir_fsp->fsp_name);
2942
2943 /*
2944 * Copy in the base directory name.
2945 */
2946
2947 parent_fname = TALLOC_ARRAY(talloc_tos(), char,
2948 dir_name_len+2);
2949 if (parent_fname == NULL) {
2950 status = NT_STATUS_NO_MEMORY;
2951 goto fail;
2952 }
2953 memcpy(parent_fname, dir_fsp->fsp_name,
2954 dir_name_len+1);
2955
2956 /*
2957 * Ensure it ends in a '/'.
2958 * We used TALLOC_SIZE +2 to add space for the '/'.
2959 */
2960
2961 if(dir_name_len
2962 && (parent_fname[dir_name_len-1] != '\\')
2963 && (parent_fname[dir_name_len-1] != '/')) {
2964 parent_fname[dir_name_len] = '/';
2965 parent_fname[dir_name_len+1] = '\0';
2966 }
2967 }
2968
2969 fname = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
2970 fname);
2971 if (fname == NULL) {
2972 status = NT_STATUS_NO_MEMORY;
2973 goto fail;
2974 }
2975 }
2976
2977 /*
2978 * Check to see if this is a mac fork of some kind.
2979 */
2980
2981 if (is_ntfs_stream_name(fname)) {
2982 enum FAKE_FILE_TYPE fake_file_type;
2983
2984 fake_file_type = is_fake_file(fname);
2985
2986 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
2987
2988 /*
2989 * Here we go! support for changing the disk quotas
2990 * --metze
2991 *
2992 * We need to fake up to open this MAGIC QUOTA file
2993 * and return a valid FID.
2994 *
2995 * w2k close this file directly after openening xp
2996 * also tries a QUERY_FILE_INFO on the file and then
2997 * close it
2998 */
2999 status = open_fake_file(conn, req->vuid,
3000 fake_file_type, fname,
3001 access_mask, &fsp);
3002 if (!NT_STATUS_IS_OK(status)) {
3003 goto fail;
3004 }
3005
3006 ZERO_STRUCT(sbuf);
3007 goto done;
3008 }
3009
3010 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3011 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3012 goto fail;
3013 }
3014 }
3015
3016 if ((req != NULL) && (req->flags2 & FLAGS2_DFS_PATHNAMES)) {
3017 char *resolved_fname;
3018
3019 status = resolve_dfspath(talloc_tos(), conn, true, fname,
3020 &resolved_fname);
3021
3022 if (!NT_STATUS_IS_OK(status)) {
3023 /*
3024 * For PATH_NOT_COVERED we had
3025 * reply_botherror(req, NT_STATUS_PATH_NOT_COVERED,
3026 * ERRSRV, ERRbadpath);
3027 * Need to fix in callers
3028 */
3029 goto fail;
3030 }
3031 fname = resolved_fname;
3032 }
3033
3034 /*
3035 * Check if POSIX semantics are wanted.
3036 */
3037
3038 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3039 case_state = set_posix_case_semantics(talloc_tos(), conn);
3040 file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
3041 }
3042
3043 {
3044 char *converted_fname;
3045
3046 SET_STAT_INVALID(sbuf);
3047
3048 status = unix_convert(talloc_tos(), conn, fname, False,
3049 &converted_fname, NULL, &sbuf);
3050 if (!NT_STATUS_IS_OK(status)) {
3051 goto fail;
3052 }
3053 fname = converted_fname;
3054 }
3055
3056 TALLOC_FREE(case_state);
3057
3058 /* All file access must go through check_name() */
3059
3060 status = check_name(conn, fname);
3061 if (!NT_STATUS_IS_OK(status)) {
3062 goto fail;
3063 }
3064
3065 status = create_file_unixpath(
3066 conn, req, fname, access_mask, share_access,
3067 create_disposition, create_options, file_attributes,
3068 oplock_request, allocation_size, sd, ea_list,
3069 &fsp, &info, &sbuf);
3070
3071 if (!NT_STATUS_IS_OK(status)) {
3072 goto fail;
3073 }
3074
3075 done:
3076 DEBUG(10, ("create_file: info=%d\n", info));
3077
3078 *result = fsp;
3079 if (pinfo != NULL) {
3080 *pinfo = info;
3081 }
3082 if (psbuf != NULL) {
3083 *psbuf = sbuf;
3084 }
3085 return NT_STATUS_OK;
3086
3087 fail:
3088 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3089
3090 if (fsp != NULL) {
3091 close_file(fsp, ERROR_CLOSE);
3092 fsp = NULL;
3093 }
3094 return status;
3095 }
WIP