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Start moving us closer to passing S4 RAW-ACL test using the vfs_acl_xattr module...
[Samba.git] / source / smbd / open.c
blob31c09bbb0a0237c6a82b7063b8ca627190821ffc
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 ((access_mask & FILE_READ_DATA)||(access_mask & FILE_WRITE_DATA)) {
1209 DEBUG(10, ("open_file_ntcreate: adding FILE_READ_ATTRIBUTES "
1210 "to requested access_mask 0x%x, new mask 0x%x",
1211 access_mask,
1212 access_mask | FILE_READ_ATTRIBUTES ));
1213
1214 access_mask |= FILE_READ_ATTRIBUTES;
1215 }
1216
1217 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1218 DEBUG(0, ("No smb request but not an internal only open!\n"));
1219 return NT_STATUS_INTERNAL_ERROR;
1220 }
1221
1222 /*
1223 * Only non-internal opens can be deferred at all
1224 */
1225
1226 if ((req != NULL)
1227 && ((pml = get_open_deferred_message(req->mid)) != NULL)) {
1228 struct deferred_open_record *state =
1229 (struct deferred_open_record *)pml->private_data.data;
1230
1231 /* Remember the absolute time of the original
1232 request with this mid. We'll use it later to
1233 see if this has timed out. */
1234
1235 request_time = pml->request_time;
1236
1237 /* Remove the deferred open entry under lock. */
1238 lck = get_share_mode_lock(talloc_tos(), state->id, NULL, NULL,
1239 NULL);
1240 if (lck == NULL) {
1241 DEBUG(0, ("could not get share mode lock\n"));
1242 } else {
1243 del_deferred_open_entry(lck, req->mid);
1244 TALLOC_FREE(lck);
1245 }
1246
1247 /* Ensure we don't reprocess this message. */
1248 remove_deferred_open_smb_message(req->mid);
1249 }
1250
1251 status = check_name(conn, fname);
1252 if (!NT_STATUS_IS_OK(status)) {
1253 return status;
1254 }
1255
1256 if (!posix_open) {
1257 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1258 if (file_existed) {
1259 existing_dos_attributes = dos_mode(conn, fname, psbuf);
1260 }
1261 }
1262
1263 /* ignore any oplock requests if oplocks are disabled */
1264 if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break ||
1265 IS_VETO_OPLOCK_PATH(conn, fname)) {
1266 /* Mask off everything except the private Samba bits. */
1267 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1268 }
1269
1270 /* this is for OS/2 long file names - say we don't support them */
1271 if (!lp_posix_pathnames() && strstr(fname,".+,;=[].")) {
1272 /* OS/2 Workplace shell fix may be main code stream in a later
1273 * release. */
1274 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1275 "supported.\n"));
1276 if (use_nt_status()) {
1277 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1278 }
1279 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1280 }
1281
1282 switch( create_disposition ) {
1283 /*
1284 * Currently we're using FILE_SUPERSEDE as the same as
1285 * FILE_OVERWRITE_IF but they really are
1286 * different. FILE_SUPERSEDE deletes an existing file
1287 * (requiring delete access) then recreates it.
1288 */
1289 case FILE_SUPERSEDE:
1290 /* If file exists replace/overwrite. If file doesn't
1291 * exist create. */
1292 flags2 |= (O_CREAT | O_TRUNC);
1293 break;
1294
1295 case FILE_OVERWRITE_IF:
1296 /* If file exists replace/overwrite. If file doesn't
1297 * exist create. */
1298 flags2 |= (O_CREAT | O_TRUNC);
1299 break;
1300
1301 case FILE_OPEN:
1302 /* If file exists open. If file doesn't exist error. */
1303 if (!file_existed) {
1304 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1305 "requested for file %s and file "
1306 "doesn't exist.\n", fname ));
1307 errno = ENOENT;
1308 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1309 }
1310 break;
1311
1312 case FILE_OVERWRITE:
1313 /* If file exists overwrite. If file doesn't exist
1314 * error. */
1315 if (!file_existed) {
1316 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1317 "requested for file %s and file "
1318 "doesn't exist.\n", fname ));
1319 errno = ENOENT;
1320 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1321 }
1322 flags2 |= O_TRUNC;
1323 break;
1324
1325 case FILE_CREATE:
1326 /* If file exists error. If file doesn't exist
1327 * create. */
1328 if (file_existed) {
1329 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1330 "requested for file %s and file "
1331 "already exists.\n", fname ));
1332 if (S_ISDIR(psbuf->st_mode)) {
1333 errno = EISDIR;
1334 } else {
1335 errno = EEXIST;
1336 }
1337 return map_nt_error_from_unix(errno);
1338 }
1339 flags2 |= (O_CREAT|O_EXCL);
1340 break;
1341
1342 case FILE_OPEN_IF:
1343 /* If file exists open. If file doesn't exist
1344 * create. */
1345 flags2 |= O_CREAT;
1346 break;
1347
1348 default:
1349 return NT_STATUS_INVALID_PARAMETER;
1350 }
1351
1352 /* We only care about matching attributes on file exists and
1353 * overwrite. */
1354
1355 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1356 (create_disposition == FILE_OVERWRITE_IF))) {
1357 if (!open_match_attributes(conn, fname,
1358 existing_dos_attributes,
1359 new_dos_attributes, psbuf->st_mode,
1360 unx_mode, &new_unx_mode)) {
1361 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1362 "for file %s (%x %x) (0%o, 0%o)\n",
1363 fname, existing_dos_attributes,
1364 new_dos_attributes,
1365 (unsigned int)psbuf->st_mode,
1366 (unsigned int)unx_mode ));
1367 errno = EACCES;
1368 return NT_STATUS_ACCESS_DENIED;
1369 }
1370 }
1371
1372 /* This is a nasty hack - must fix... JRA. */
1373 if (access_mask == MAXIMUM_ALLOWED_ACCESS) {
1374 open_access_mask = access_mask = FILE_GENERIC_ALL;
1375 }
1376
1377 /*
1378 * Convert GENERIC bits to specific bits.
1379 */
1380
1381 se_map_generic(&access_mask, &file_generic_mapping);
1382 open_access_mask = access_mask;
1383
1384 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1385 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1386 }
1387
1388 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1389 "access_mask=0x%x\n", fname, access_mask ));
1390
1391 /*
1392 * Note that we ignore the append flag as append does not
1393 * mean the same thing under DOS and Unix.
1394 */
1395
1396 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1397 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1398 /* DENY_DOS opens are always underlying read-write on the
1399 file handle, no matter what the requested access mask
1400 says. */
1401 if ((create_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1402 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1403 flags = O_RDWR;
1404 } else {
1405 flags = O_WRONLY;
1406 }
1407 } else {
1408 flags = O_RDONLY;
1409 }
1410
1411 /*
1412 * Currently we only look at FILE_WRITE_THROUGH for create options.
1413 */
1414
1415 #if defined(O_SYNC)
1416 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1417 flags2 |= O_SYNC;
1418 }
1419 #endif /* O_SYNC */
1420
1421 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1422 flags2 |= O_APPEND;
1423 }
1424
1425 if (!posix_open && !CAN_WRITE(conn)) {
1426 /*
1427 * We should really return a permission denied error if either
1428 * O_CREAT or O_TRUNC are set, but for compatibility with
1429 * older versions of Samba we just AND them out.
1430 */
1431 flags2 &= ~(O_CREAT|O_TRUNC);
1432 }
1433
1434 /*
1435 * Ensure we can't write on a read-only share or file.
1436 */
1437
1438 if (flags != O_RDONLY && file_existed &&
1439 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1440 DEBUG(5,("open_file_ntcreate: write access requested for "
1441 "file %s on read only %s\n",
1442 fname, !CAN_WRITE(conn) ? "share" : "file" ));
1443 errno = EACCES;
1444 return NT_STATUS_ACCESS_DENIED;
1445 }
1446
1447 status = file_new(conn, &fsp);
1448 if(!NT_STATUS_IS_OK(status)) {
1449 return status;
1450 }
1451
1452 fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
1453 fsp->share_access = share_access;
1454 fsp->fh->private_options = create_options;
1455 fsp->access_mask = open_access_mask; /* We change this to the
1456 * requested access_mask after
1457 * the open is done. */
1458 fsp->posix_open = posix_open;
1459
1460 /* Ensure no SAMBA_PRIVATE bits can be set. */
1461 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1462
1463 if (timeval_is_zero(&request_time)) {
1464 request_time = fsp->open_time;
1465 }
1466
1467 if (file_existed) {
1468 struct timespec old_write_time = get_mtimespec(psbuf);
1469 id = vfs_file_id_from_sbuf(conn, psbuf);
1470
1471 lck = get_share_mode_lock(talloc_tos(), id,
1472 conn->connectpath,
1473 fname, &old_write_time);
1474
1475 if (lck == NULL) {
1476 file_free(fsp);
1477 DEBUG(0, ("Could not get share mode lock\n"));
1478 return NT_STATUS_SHARING_VIOLATION;
1479 }
1480
1481 /* First pass - send break only on batch oplocks. */
1482 if ((req != NULL)
1483 && delay_for_oplocks(lck, fsp, req->mid, 1,
1484 oplock_request)) {
1485 schedule_defer_open(lck, request_time, req);
1486 TALLOC_FREE(lck);
1487 file_free(fsp);
1488 return NT_STATUS_SHARING_VIOLATION;
1489 }
1490
1491 /* Use the client requested access mask here, not the one we
1492 * open with. */
1493 status = open_mode_check(conn, fname, lck,
1494 access_mask, share_access,
1495 create_options, &file_existed);
1496
1497 if (NT_STATUS_IS_OK(status)) {
1498 /* We might be going to allow this open. Check oplock
1499 * status again. */
1500 /* Second pass - send break for both batch or
1501 * exclusive oplocks. */
1502 if ((req != NULL)
1503 && delay_for_oplocks(lck, fsp, req->mid, 2,
1504 oplock_request)) {
1505 schedule_defer_open(lck, request_time, req);
1506 TALLOC_FREE(lck);
1507 file_free(fsp);
1508 return NT_STATUS_SHARING_VIOLATION;
1509 }
1510 }
1511
1512 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1513 /* DELETE_PENDING is not deferred for a second */
1514 TALLOC_FREE(lck);
1515 file_free(fsp);
1516 return status;
1517 }
1518
1519 if (!NT_STATUS_IS_OK(status)) {
1520 uint32 can_access_mask;
1521 bool can_access = True;
1522
1523 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1524
1525 /* Check if this can be done with the deny_dos and fcb
1526 * calls. */
1527 if (create_options &
1528 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1529 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1530 files_struct *fsp_dup;
1531
1532 if (req == NULL) {
1533 DEBUG(0, ("DOS open without an SMB "
1534 "request!\n"));
1535 TALLOC_FREE(lck);
1536 file_free(fsp);
1537 return NT_STATUS_INTERNAL_ERROR;
1538 }
1539
1540 /* Use the client requested access mask here,
1541 * not the one we open with. */
1542 fsp_dup = fcb_or_dos_open(conn, fname, id,
1543 req->smbpid,
1544 req->vuid,
1545 access_mask,
1546 share_access,
1547 create_options);
1548
1549 if (fsp_dup) {
1550 TALLOC_FREE(lck);
1551 file_free(fsp);
1552 if (pinfo) {
1553 *pinfo = FILE_WAS_OPENED;
1554 }
1555 conn->num_files_open++;
1556 *result = fsp_dup;
1557 return NT_STATUS_OK;
1558 }
1559 }
1560
1561 /*
1562 * This next line is a subtlety we need for
1563 * MS-Access. If a file open will fail due to share
1564 * permissions and also for security (access) reasons,
1565 * we need to return the access failed error, not the
1566 * share error. We can't open the file due to kernel
1567 * oplock deadlock (it's possible we failed above on
1568 * the open_mode_check()) so use a userspace check.
1569 */
1570
1571 if (flags & O_RDWR) {
1572 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1573 } else if (flags & O_WRONLY) {
1574 can_access_mask = FILE_WRITE_DATA;
1575 } else {
1576 can_access_mask = FILE_READ_DATA;
1577 }
1578
1579 if (((can_access_mask & FILE_WRITE_DATA) && !CAN_WRITE(conn)) ||
1580 !can_access_file_data(conn,fname,psbuf,can_access_mask)) {
1581 can_access = False;
1582 }
1583
1584 /*
1585 * If we're returning a share violation, ensure we
1586 * cope with the braindead 1 second delay.
1587 */
1588
1589 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1590 lp_defer_sharing_violations()) {
1591 struct timeval timeout;
1592 struct deferred_open_record state;
1593 int timeout_usecs;
1594
1595 /* this is a hack to speed up torture tests
1596 in 'make test' */
1597 timeout_usecs = lp_parm_int(SNUM(conn),
1598 "smbd","sharedelay",
1599 SHARING_VIOLATION_USEC_WAIT);
1600
1601 /* This is a relative time, added to the absolute
1602 request_time value to get the absolute timeout time.
1603 Note that if this is the second or greater time we enter
1604 this codepath for this particular request mid then
1605 request_time is left as the absolute time of the *first*
1606 time this request mid was processed. This is what allows
1607 the request to eventually time out. */
1608
1609 timeout = timeval_set(0, timeout_usecs);
1610
1611 /* Nothing actually uses state.delayed_for_oplocks
1612 but it's handy to differentiate in debug messages
1613 between a 30 second delay due to oplock break, and
1614 a 1 second delay for share mode conflicts. */
1615
1616 state.delayed_for_oplocks = False;
1617 state.id = id;
1618
1619 if ((req != NULL)
1620 && !request_timed_out(request_time,
1621 timeout)) {
1622 defer_open(lck, request_time, timeout,
1623 req, &state);
1624 }
1625 }
1626
1627 TALLOC_FREE(lck);
1628 if (can_access) {
1629 /*
1630 * We have detected a sharing violation here
1631 * so return the correct error code
1632 */
1633 status = NT_STATUS_SHARING_VIOLATION;
1634 } else {
1635 status = NT_STATUS_ACCESS_DENIED;
1636 }
1637 file_free(fsp);
1638 return status;
1639 }
1640
1641 /*
1642 * We exit this block with the share entry *locked*.....
1643 */
1644 }
1645
1646 SMB_ASSERT(!file_existed || (lck != NULL));
1647
1648 /*
1649 * Ensure we pay attention to default ACLs on directories if required.
1650 */
1651
1652 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1653 (def_acl = directory_has_default_acl(conn, parent_dir))) {
1654 unx_mode = 0777;
1655 }
1656
1657 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1658 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1659 (unsigned int)flags, (unsigned int)flags2,
1660 (unsigned int)unx_mode, (unsigned int)access_mask,
1661 (unsigned int)open_access_mask));
1662
1663 /*
1664 * open_file strips any O_TRUNC flags itself.
1665 */
1666
1667 fsp_open = open_file(fsp, conn, req, parent_dir, newname, fname, psbuf,
1668 flags|flags2, unx_mode, access_mask,
1669 open_access_mask);
1670
1671 if (!NT_STATUS_IS_OK(fsp_open)) {
1672 if (lck != NULL) {
1673 TALLOC_FREE(lck);
1674 }
1675 file_free(fsp);
1676 return fsp_open;
1677 }
1678
1679 if (!file_existed) {
1680 struct timespec old_write_time = get_mtimespec(psbuf);
1681 /*
1682 * Deal with the race condition where two smbd's detect the
1683 * file doesn't exist and do the create at the same time. One
1684 * of them will win and set a share mode, the other (ie. this
1685 * one) should check if the requested share mode for this
1686 * create is allowed.
1687 */
1688
1689 /*
1690 * Now the file exists and fsp is successfully opened,
1691 * fsp->dev and fsp->inode are valid and should replace the
1692 * dev=0,inode=0 from a non existent file. Spotted by
1693 * Nadav Danieli <nadavd@exanet.com>. JRA.
1694 */
1695
1696 id = fsp->file_id;
1697
1698 lck = get_share_mode_lock(talloc_tos(), id,
1699 conn->connectpath,
1700 fname, &old_write_time);
1701
1702 if (lck == NULL) {
1703 DEBUG(0, ("open_file_ntcreate: Could not get share "
1704 "mode lock for %s\n", fname));
1705 fd_close(fsp);
1706 file_free(fsp);
1707 return NT_STATUS_SHARING_VIOLATION;
1708 }
1709
1710 /* First pass - send break only on batch oplocks. */
1711 if ((req != NULL)
1712 && delay_for_oplocks(lck, fsp, req->mid, 1,
1713 oplock_request)) {
1714 schedule_defer_open(lck, request_time, req);
1715 TALLOC_FREE(lck);
1716 fd_close(fsp);
1717 file_free(fsp);
1718 return NT_STATUS_SHARING_VIOLATION;
1719 }
1720
1721 status = open_mode_check(conn, fname, lck,
1722 access_mask, share_access,
1723 create_options, &file_existed);
1724
1725 if (NT_STATUS_IS_OK(status)) {
1726 /* We might be going to allow this open. Check oplock
1727 * status again. */
1728 /* Second pass - send break for both batch or
1729 * exclusive oplocks. */
1730 if ((req != NULL)
1731 && delay_for_oplocks(lck, fsp, req->mid, 2,
1732 oplock_request)) {
1733 schedule_defer_open(lck, request_time, req);
1734 TALLOC_FREE(lck);
1735 fd_close(fsp);
1736 file_free(fsp);
1737 return NT_STATUS_SHARING_VIOLATION;
1738 }
1739 }
1740
1741 if (!NT_STATUS_IS_OK(status)) {
1742 struct deferred_open_record state;
1743
1744 fd_close(fsp);
1745 file_free(fsp);
1746
1747 state.delayed_for_oplocks = False;
1748 state.id = id;
1749
1750 /* Do it all over again immediately. In the second
1751 * round we will find that the file existed and handle
1752 * the DELETE_PENDING and FCB cases correctly. No need
1753 * to duplicate the code here. Essentially this is a
1754 * "goto top of this function", but don't tell
1755 * anybody... */
1756
1757 if (req != NULL) {
1758 defer_open(lck, request_time, timeval_zero(),
1759 req, &state);
1760 }
1761 TALLOC_FREE(lck);
1762 return status;
1763 }
1764
1765 /*
1766 * We exit this block with the share entry *locked*.....
1767 */
1768
1769 }
1770
1771 SMB_ASSERT(lck != NULL);
1772
1773 /* note that we ignore failure for the following. It is
1774 basically a hack for NFS, and NFS will never set one of
1775 these only read them. Nobody but Samba can ever set a deny
1776 mode and we have already checked our more authoritative
1777 locking database for permission to set this deny mode. If
1778 the kernel refuses the operations then the kernel is wrong.
1779 note that GPFS supports it as well - jmcd */
1780
1781 if (fsp->fh->fd != -1) {
1782 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access);
1783 if(ret_flock == -1 ){
1784
1785 TALLOC_FREE(lck);
1786 fd_close(fsp);
1787 file_free(fsp);
1788
1789 return NT_STATUS_SHARING_VIOLATION;
1790 }
1791 }
1792
1793 /*
1794 * At this point onwards, we can guarentee that the share entry
1795 * is locked, whether we created the file or not, and that the
1796 * deny mode is compatible with all current opens.
1797 */
1798
1799 /*
1800 * If requested, truncate the file.
1801 */
1802
1803 if (flags2&O_TRUNC) {
1804 /*
1805 * We are modifing the file after open - update the stat
1806 * struct..
1807 */
1808 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
1809 (SMB_VFS_FSTAT(fsp, psbuf)==-1)) {
1810 status = map_nt_error_from_unix(errno);
1811 TALLOC_FREE(lck);
1812 fd_close(fsp);
1813 file_free(fsp);
1814 return status;
1815 }
1816 }
1817
1818 /* Record the options we were opened with. */
1819 fsp->share_access = share_access;
1820 fsp->fh->private_options = create_options;
1821 fsp->access_mask = access_mask;
1822
1823 if (file_existed) {
1824 /* stat opens on existing files don't get oplocks. */
1825 if (is_stat_open(open_access_mask)) {
1826 fsp->oplock_type = NO_OPLOCK;
1827 }
1828
1829 if (!(flags2 & O_TRUNC)) {
1830 info = FILE_WAS_OPENED;
1831 } else {
1832 info = FILE_WAS_OVERWRITTEN;
1833 }
1834 } else {
1835 info = FILE_WAS_CREATED;
1836 }
1837
1838 if (pinfo) {
1839 *pinfo = info;
1840 }
1841
1842 /*
1843 * Setup the oplock info in both the shared memory and
1844 * file structs.
1845 */
1846
1847 if ((fsp->oplock_type != NO_OPLOCK) &&
1848 (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK)) {
1849 if (!set_file_oplock(fsp, fsp->oplock_type)) {
1850 /* Could not get the kernel oplock */
1851 fsp->oplock_type = NO_OPLOCK;
1852 }
1853 }
1854
1855 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
1856 new_file_created = True;
1857 }
1858
1859 set_share_mode(lck, fsp, conn->server_info->utok.uid, 0,
1860 fsp->oplock_type, new_file_created);
1861
1862 /* Handle strange delete on close create semantics. */
1863 if ((create_options & FILE_DELETE_ON_CLOSE)
1864 && (((conn->fs_capabilities & FILE_NAMED_STREAMS)
1865 && is_ntfs_stream_name(fname))
1866 || can_set_initial_delete_on_close(lck))) {
1867 status = can_set_delete_on_close(fsp, True, new_dos_attributes);
1868
1869 if (!NT_STATUS_IS_OK(status)) {
1870 /* Remember to delete the mode we just added. */
1871 del_share_mode(lck, fsp);
1872 TALLOC_FREE(lck);
1873 fd_close(fsp);
1874 file_free(fsp);
1875 return status;
1876 }
1877 /* Note that here we set the *inital* delete on close flag,
1878 not the regular one. The magic gets handled in close. */
1879 fsp->initial_delete_on_close = True;
1880 }
1881
1882 if (new_file_created) {
1883 /* Files should be initially set as archive */
1884 if (lp_map_archive(SNUM(conn)) ||
1885 lp_store_dos_attributes(SNUM(conn))) {
1886 if (!posix_open) {
1887 SMB_STRUCT_STAT tmp_sbuf;
1888 SET_STAT_INVALID(tmp_sbuf);
1889 if (file_set_dosmode(
1890 conn, fname,
1891 new_dos_attributes | aARCH,
1892 &tmp_sbuf, parent_dir,
1893 true) == 0) {
1894 unx_mode = tmp_sbuf.st_mode;
1895 }
1896 }
1897 }
1898 }
1899
1900 /*
1901 * Take care of inherited ACLs on created files - if default ACL not
1902 * selected.
1903 */
1904
1905 if (!posix_open && !file_existed && !def_acl) {
1906
1907 int saved_errno = errno; /* We might get ENOSYS in the next
1908 * call.. */
1909
1910 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
1911 errno == ENOSYS) {
1912 errno = saved_errno; /* Ignore ENOSYS */
1913 }
1914
1915 } else if (new_unx_mode) {
1916
1917 int ret = -1;
1918
1919 /* Attributes need changing. File already existed. */
1920
1921 {
1922 int saved_errno = errno; /* We might get ENOSYS in the
1923 * next call.. */
1924 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
1925
1926 if (ret == -1 && errno == ENOSYS) {
1927 errno = saved_errno; /* Ignore ENOSYS */
1928 } else {
1929 DEBUG(5, ("open_file_ntcreate: reset "
1930 "attributes of file %s to 0%o\n",
1931 fname, (unsigned int)new_unx_mode));
1932 ret = 0; /* Don't do the fchmod below. */
1933 }
1934 }
1935
1936 if ((ret == -1) &&
1937 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
1938 DEBUG(5, ("open_file_ntcreate: failed to reset "
1939 "attributes of file %s to 0%o\n",
1940 fname, (unsigned int)new_unx_mode));
1941 }
1942
1943 /* If this is a successful open, we must remove any deferred open
1944 * records. */
1945 if (req != NULL) {
1946 del_deferred_open_entry(lck, req->mid);
1947 }
1948 TALLOC_FREE(lck);
1949
1950 conn->num_files_open++;
1951
1952 *result = fsp;
1953 return NT_STATUS_OK;
1954 }
1955
1956 /****************************************************************************
1957 Open a file for for write to ensure that we can fchmod it.
1958 ****************************************************************************/
1959
1960 NTSTATUS open_file_fchmod(connection_struct *conn, const char *fname,
1961 SMB_STRUCT_STAT *psbuf, files_struct **result)
1962 {
1963 files_struct *fsp = NULL;
1964 NTSTATUS status;
1965
1966 if (!VALID_STAT(*psbuf)) {
1967 return NT_STATUS_INVALID_PARAMETER;
1968 }
1969
1970 status = file_new(conn, &fsp);
1971 if(!NT_STATUS_IS_OK(status)) {
1972 return status;
1973 }
1974
1975 /* note! we must use a non-zero desired access or we don't get
1976 a real file descriptor. Oh what a twisted web we weave. */
1977 status = open_file(fsp, conn, NULL, NULL, NULL, fname, psbuf, O_WRONLY,
1978 0, FILE_WRITE_DATA, FILE_WRITE_DATA);
1979
1980 /*
1981 * This is not a user visible file open.
1982 * Don't set a share mode and don't increment
1983 * the conn->num_files_open.
1984 */
1985
1986 if (!NT_STATUS_IS_OK(status)) {
1987 file_free(fsp);
1988 return status;
1989 }
1990
1991 *result = fsp;
1992 return NT_STATUS_OK;
1993 }
1994
1995 /****************************************************************************
1996 Close the fchmod file fd - ensure no locks are lost.
1997 ****************************************************************************/
1998
1999 NTSTATUS close_file_fchmod(files_struct *fsp)
2000 {
2001 NTSTATUS status = fd_close(fsp);
2002 file_free(fsp);
2003 return status;
2004 }
2005
2006 static NTSTATUS mkdir_internal(connection_struct *conn,
2007 const char *name,
2008 uint32 file_attributes,
2009 SMB_STRUCT_STAT *psbuf)
2010 {
2011 mode_t mode;
2012 char *parent_dir;
2013 const char *dirname;
2014 NTSTATUS status;
2015 bool posix_open = false;
2016
2017 if(!CAN_WRITE(conn)) {
2018 DEBUG(5,("mkdir_internal: failing create on read-only share "
2019 "%s\n", lp_servicename(SNUM(conn))));
2020 return NT_STATUS_ACCESS_DENIED;
2021 }
2022
2023 status = check_name(conn, name);
2024 if (!NT_STATUS_IS_OK(status)) {
2025 return status;
2026 }
2027
2028 if (!parent_dirname_talloc(talloc_tos(), name, &parent_dir,
2029 &dirname)) {
2030 return NT_STATUS_NO_MEMORY;
2031 }
2032
2033 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2034 posix_open = true;
2035 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2036 } else {
2037 mode = unix_mode(conn, aDIR, name, parent_dir);
2038 }
2039
2040 if (SMB_VFS_MKDIR(conn, name, mode) != 0) {
2041 return map_nt_error_from_unix(errno);
2042 }
2043
2044 /* Ensure we're checking for a symlink here.... */
2045 /* We don't want to get caught by a symlink racer. */
2046
2047 if (SMB_VFS_LSTAT(conn, name, psbuf) == -1) {
2048 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2049 name, strerror(errno)));
2050 return map_nt_error_from_unix(errno);
2051 }
2052
2053 if (!S_ISDIR(psbuf->st_mode)) {
2054 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2055 name));
2056 return NT_STATUS_ACCESS_DENIED;
2057 }
2058
2059 if (lp_store_dos_attributes(SNUM(conn))) {
2060 if (!posix_open) {
2061 file_set_dosmode(conn, name,
2062 file_attributes | aDIR, NULL,
2063 parent_dir,
2064 true);
2065 }
2066 }
2067
2068 if (lp_inherit_perms(SNUM(conn))) {
2069 inherit_access_posix_acl(conn, parent_dir, name, mode);
2070 }
2071
2072 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2073 /*
2074 * Check if high bits should have been set,
2075 * then (if bits are missing): add them.
2076 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2077 * dir.
2078 */
2079 if (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO) && (mode & ~psbuf->st_mode)) {
2080 SMB_VFS_CHMOD(conn, name,
2081 psbuf->st_mode | (mode & ~psbuf->st_mode));
2082 }
2083 }
2084
2085 /* Change the owner if required. */
2086 if (lp_inherit_owner(SNUM(conn))) {
2087 change_dir_owner_to_parent(conn, parent_dir, name, psbuf);
2088 }
2089
2090 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2091 name);
2092
2093 return NT_STATUS_OK;
2094 }
2095
2096 /****************************************************************************
2097 Open a directory from an NT SMB call.
2098 ****************************************************************************/
2099
2100 NTSTATUS open_directory(connection_struct *conn,
2101 struct smb_request *req,
2102 const char *fname,
2103 SMB_STRUCT_STAT *psbuf,
2104 uint32 access_mask,
2105 uint32 share_access,
2106 uint32 create_disposition,
2107 uint32 create_options,
2108 uint32 file_attributes,
2109 int *pinfo,
2110 files_struct **result)
2111 {
2112 files_struct *fsp = NULL;
2113 bool dir_existed = VALID_STAT(*psbuf) ? True : False;
2114 struct share_mode_lock *lck = NULL;
2115 NTSTATUS status;
2116 struct timespec mtimespec;
2117 int info = 0;
2118
2119 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2120 "share_access = 0x%x create_options = 0x%x, "
2121 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2122 fname,
2123 (unsigned int)access_mask,
2124 (unsigned int)share_access,
2125 (unsigned int)create_options,
2126 (unsigned int)create_disposition,
2127 (unsigned int)file_attributes));
2128
2129 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2130 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2131 is_ntfs_stream_name(fname)) {
2132 DEBUG(2, ("open_directory: %s is a stream name!\n", fname));
2133 return NT_STATUS_NOT_A_DIRECTORY;
2134 }
2135
2136 switch( create_disposition ) {
2137 case FILE_OPEN:
2138
2139 info = FILE_WAS_OPENED;
2140
2141 /*
2142 * We want to follow symlinks here.
2143 */
2144
2145 if (SMB_VFS_STAT(conn, fname, psbuf) != 0) {
2146 return map_nt_error_from_unix(errno);
2147 }
2148
2149 break;
2150
2151 case FILE_CREATE:
2152
2153 /* If directory exists error. If directory doesn't
2154 * exist create. */
2155
2156 status = mkdir_internal(conn,
2157 fname,
2158 file_attributes,
2159 psbuf);
2160
2161 if (!NT_STATUS_IS_OK(status)) {
2162 DEBUG(2, ("open_directory: unable to create "
2163 "%s. Error was %s\n", fname,
2164 nt_errstr(status)));
2165 return status;
2166 }
2167
2168 info = FILE_WAS_CREATED;
2169 break;
2170
2171 case FILE_OPEN_IF:
2172 /*
2173 * If directory exists open. If directory doesn't
2174 * exist create.
2175 */
2176
2177 status = mkdir_internal(conn,
2178 fname,
2179 file_attributes,
2180 psbuf);
2181
2182 if (NT_STATUS_IS_OK(status)) {
2183 info = FILE_WAS_CREATED;
2184 }
2185
2186 if (NT_STATUS_EQUAL(status,
2187 NT_STATUS_OBJECT_NAME_COLLISION)) {
2188 info = FILE_WAS_OPENED;
2189 status = NT_STATUS_OK;
2190 }
2191
2192 break;
2193
2194 case FILE_SUPERSEDE:
2195 case FILE_OVERWRITE:
2196 case FILE_OVERWRITE_IF:
2197 default:
2198 DEBUG(5,("open_directory: invalid create_disposition "
2199 "0x%x for directory %s\n",
2200 (unsigned int)create_disposition, fname));
2201 return NT_STATUS_INVALID_PARAMETER;
2202 }
2203
2204 if(!S_ISDIR(psbuf->st_mode)) {
2205 DEBUG(5,("open_directory: %s is not a directory !\n",
2206 fname ));
2207 return NT_STATUS_NOT_A_DIRECTORY;
2208 }
2209
2210 status = file_new(conn, &fsp);
2211 if(!NT_STATUS_IS_OK(status)) {
2212 return status;
2213 }
2214
2215 /*
2216 * Setup the files_struct for it.
2217 */
2218
2219 fsp->mode = psbuf->st_mode;
2220 fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
2221 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2222 fsp->file_pid = req ? req->smbpid : 0;
2223 fsp->can_lock = False;
2224 fsp->can_read = False;
2225 fsp->can_write = False;
2226
2227 fsp->share_access = share_access;
2228 fsp->fh->private_options = create_options;
2229 fsp->access_mask = access_mask;
2230
2231 fsp->print_file = False;
2232 fsp->modified = False;
2233 fsp->oplock_type = NO_OPLOCK;
2234 fsp->sent_oplock_break = NO_BREAK_SENT;
2235 fsp->is_directory = True;
2236 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2237
2238 string_set(&fsp->fsp_name,fname);
2239
2240 mtimespec = get_mtimespec(psbuf);
2241
2242 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2243 conn->connectpath,
2244 fname, &mtimespec);
2245
2246 if (lck == NULL) {
2247 DEBUG(0, ("open_directory: Could not get share mode lock for %s\n", fname));
2248 file_free(fsp);
2249 return NT_STATUS_SHARING_VIOLATION;
2250 }
2251
2252 status = open_mode_check(conn, fname, lck,
2253 access_mask, share_access,
2254 create_options, &dir_existed);
2255
2256 if (!NT_STATUS_IS_OK(status)) {
2257 TALLOC_FREE(lck);
2258 file_free(fsp);
2259 return status;
2260 }
2261
2262 set_share_mode(lck, fsp, conn->server_info->utok.uid, 0, NO_OPLOCK,
2263 True);
2264
2265 /* For directories the delete on close bit at open time seems
2266 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2267 if (create_options & FILE_DELETE_ON_CLOSE) {
2268 status = can_set_delete_on_close(fsp, True, 0);
2269 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2270 TALLOC_FREE(lck);
2271 file_free(fsp);
2272 return status;
2273 }
2274
2275 if (NT_STATUS_IS_OK(status)) {
2276 /* Note that here we set the *inital* delete on close flag,
2277 not the regular one. The magic gets handled in close. */
2278 fsp->initial_delete_on_close = True;
2279 }
2280 }
2281
2282 TALLOC_FREE(lck);
2283
2284 if (pinfo) {
2285 *pinfo = info;
2286 }
2287
2288 conn->num_files_open++;
2289
2290 *result = fsp;
2291 return NT_STATUS_OK;
2292 }
2293
2294 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req, const char *directory)
2295 {
2296 NTSTATUS status;
2297 SMB_STRUCT_STAT sbuf;
2298 files_struct *fsp;
2299
2300 SET_STAT_INVALID(sbuf);
2301
2302 status = open_directory(conn, req, directory, &sbuf,
2303 FILE_READ_ATTRIBUTES, /* Just a stat open */
2304 FILE_SHARE_NONE, /* Ignored for stat opens */
2305 FILE_CREATE,
2306 0,
2307 FILE_ATTRIBUTE_DIRECTORY,
2308 NULL,
2309 &fsp);
2310
2311 if (NT_STATUS_IS_OK(status)) {
2312 close_file(fsp, NORMAL_CLOSE);
2313 }
2314
2315 return status;
2316 }
2317
2318 /****************************************************************************
2319 Receive notification that one of our open files has been renamed by another
2320 smbd process.
2321 ****************************************************************************/
2322
2323 void msg_file_was_renamed(struct messaging_context *msg,
2324 void *private_data,
2325 uint32_t msg_type,
2326 struct server_id server_id,
2327 DATA_BLOB *data)
2328 {
2329 files_struct *fsp;
2330 char *frm = (char *)data->data;
2331 struct file_id id;
2332 const char *sharepath;
2333 const char *newname;
2334 size_t sp_len;
2335
2336 if (data->data == NULL
2337 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2338 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2339 (int)data->length));
2340 return;
2341 }
2342
2343 /* Unpack the message. */
2344 pull_file_id_16(frm, &id);
2345 sharepath = &frm[16];
2346 newname = sharepath + strlen(sharepath) + 1;
2347 sp_len = strlen(sharepath);
2348
2349 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2350 "file_id %s\n",
2351 sharepath, newname, file_id_string_tos(&id)));
2352
2353 for(fsp = file_find_di_first(id); fsp; fsp = file_find_di_next(fsp)) {
2354 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2355 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2356 fsp->fnum, fsp->fsp_name, newname ));
2357 string_set(&fsp->fsp_name, newname);
2358 } else {
2359 /* TODO. JRA. */
2360 /* Now we have the complete path we can work out if this is
2361 actually within this share and adjust newname accordingly. */
2362 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2363 "not sharepath %s) "
2364 "fnum %d from %s -> %s\n",
2365 fsp->conn->connectpath,
2366 sharepath,
2367 fsp->fnum,
2368 fsp->fsp_name,
2369 newname ));
2370 }
2371 }
2372 }
2373
2374 struct case_semantics_state {
2375 connection_struct *conn;
2376 bool case_sensitive;
2377 bool case_preserve;
2378 bool short_case_preserve;
2379 };
2380
2381 /****************************************************************************
2382 Restore case semantics.
2383 ****************************************************************************/
2384 static int restore_case_semantics(struct case_semantics_state *state)
2385 {
2386 state->conn->case_sensitive = state->case_sensitive;
2387 state->conn->case_preserve = state->case_preserve;
2388 state->conn->short_case_preserve = state->short_case_preserve;
2389 return 0;
2390 }
2391
2392 /****************************************************************************
2393 Save case semantics.
2394 ****************************************************************************/
2395 static struct case_semantics_state *set_posix_case_semantics(TALLOC_CTX *mem_ctx,
2396 connection_struct *conn)
2397 {
2398 struct case_semantics_state *result;
2399
2400 if (!(result = talloc(mem_ctx, struct case_semantics_state))) {
2401 DEBUG(0, ("talloc failed\n"));
2402 return NULL;
2403 }
2404
2405 result->conn = conn;
2406 result->case_sensitive = conn->case_sensitive;
2407 result->case_preserve = conn->case_preserve;
2408 result->short_case_preserve = conn->short_case_preserve;
2409
2410 /* Set to POSIX. */
2411 conn->case_sensitive = True;
2412 conn->case_preserve = True;
2413 conn->short_case_preserve = True;
2414
2415 talloc_set_destructor(result, restore_case_semantics);
2416
2417 return result;
2418 }
2419
2420 /*
2421 * If a main file is opened for delete, all streams need to be checked for
2422 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2423 * If that works, delete them all by setting the delete on close and close.
2424 */
2425
2426 static NTSTATUS open_streams_for_delete(connection_struct *conn,
2427 const char *fname)
2428 {
2429 struct stream_struct *stream_info;
2430 files_struct **streams;
2431 int i;
2432 unsigned int num_streams;
2433 TALLOC_CTX *frame = talloc_stackframe();
2434 NTSTATUS status;
2435
2436 status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
2437 &num_streams, &stream_info);
2438
2439 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2440 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2441 DEBUG(10, ("no streams around\n"));
2442 TALLOC_FREE(frame);
2443 return NT_STATUS_OK;
2444 }
2445
2446 if (!NT_STATUS_IS_OK(status)) {
2447 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
2448 nt_errstr(status)));
2449 goto fail;
2450 }
2451
2452 DEBUG(10, ("open_streams_for_delete found %d streams\n",
2453 num_streams));
2454
2455 if (num_streams == 0) {
2456 TALLOC_FREE(frame);
2457 return NT_STATUS_OK;
2458 }
2459
2460 streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
2461 if (streams == NULL) {
2462 DEBUG(0, ("talloc failed\n"));
2463 status = NT_STATUS_NO_MEMORY;
2464 goto fail;
2465 }
2466
2467 for (i=0; i<num_streams; i++) {
2468 char *streamname;
2469
2470 if (strequal(stream_info[i].name, "::$DATA")) {
2471 streams[i] = NULL;
2472 continue;
2473 }
2474
2475 streamname = talloc_asprintf(talloc_tos(), "%s%s", fname,
2476 stream_info[i].name);
2477
2478 if (streamname == NULL) {
2479 DEBUG(0, ("talloc_aprintf failed\n"));
2480 status = NT_STATUS_NO_MEMORY;
2481 goto fail;
2482 }
2483
2484 status = create_file_unixpath
2485 (conn, /* conn */
2486 NULL, /* req */
2487 streamname, /* fname */
2488 DELETE_ACCESS, /* access_mask */
2489 FILE_SHARE_READ | FILE_SHARE_WRITE
2490 | FILE_SHARE_DELETE, /* share_access */
2491 FILE_OPEN, /* create_disposition*/
2492 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* create_options */
2493 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
2494 0, /* oplock_request */
2495 0, /* allocation_size */
2496 NULL, /* sd */
2497 NULL, /* ea_list */
2498 &streams[i], /* result */
2499 NULL, /* pinfo */
2500 NULL); /* psbuf */
2501
2502 TALLOC_FREE(streamname);
2503
2504 if (!NT_STATUS_IS_OK(status)) {
2505 DEBUG(10, ("Could not open stream %s: %s\n",
2506 streamname, nt_errstr(status)));
2507 break;
2508 }
2509 }
2510
2511 /*
2512 * don't touch the variable "status" beyond this point :-)
2513 */
2514
2515 for (i -= 1 ; i >= 0; i--) {
2516 if (streams[i] == NULL) {
2517 continue;
2518 }
2519
2520 DEBUG(10, ("Closing stream # %d, %s\n", i,
2521 streams[i]->fsp_name));
2522 close_file(streams[i], NORMAL_CLOSE);
2523 }
2524
2525 fail:
2526 TALLOC_FREE(frame);
2527 return status;
2528 }
2529
2530 /*
2531 * Wrapper around open_file_ntcreate and open_directory
2532 */
2533
2534 NTSTATUS create_file_unixpath(connection_struct *conn,
2535 struct smb_request *req,
2536 const char *fname,
2537 uint32_t access_mask,
2538 uint32_t share_access,
2539 uint32_t create_disposition,
2540 uint32_t create_options,
2541 uint32_t file_attributes,
2542 uint32_t oplock_request,
2543 SMB_BIG_UINT allocation_size,
2544 struct security_descriptor *sd,
2545 struct ea_list *ea_list,
2546
2547 files_struct **result,
2548 int *pinfo,
2549 SMB_STRUCT_STAT *psbuf)
2550 {
2551 SMB_STRUCT_STAT sbuf;
2552 int info = FILE_WAS_OPENED;
2553 files_struct *base_fsp = NULL;
2554 files_struct *fsp = NULL;
2555 NTSTATUS status;
2556
2557 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
2558 "file_attributes = 0x%x, share_access = 0x%x, "
2559 "create_disposition = 0x%x create_options = 0x%x "
2560 "oplock_request = 0x%x ea_list = 0x%p, sd = 0x%p, "
2561 "fname = %s\n",
2562 (unsigned int)access_mask,
2563 (unsigned int)file_attributes,
2564 (unsigned int)share_access,
2565 (unsigned int)create_disposition,
2566 (unsigned int)create_options,
2567 (unsigned int)oplock_request,
2568 ea_list, sd, fname));
2569
2570 if (create_options & FILE_OPEN_BY_FILE_ID) {
2571 status = NT_STATUS_NOT_SUPPORTED;
2572 goto fail;
2573 }
2574
2575 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
2576 status = NT_STATUS_INVALID_PARAMETER;
2577 goto fail;
2578 }
2579
2580 if (req == NULL) {
2581 oplock_request |= INTERNAL_OPEN_ONLY;
2582 }
2583
2584 if (psbuf != NULL) {
2585 sbuf = *psbuf;
2586 }
2587 else {
2588 if (SMB_VFS_STAT(conn, fname, &sbuf) == -1) {
2589 SET_STAT_INVALID(sbuf);
2590 }
2591 }
2592
2593 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2594 && (access_mask & DELETE_ACCESS)
2595 && !is_ntfs_stream_name(fname)) {
2596 /*
2597 * We can't open a file with DELETE access if any of the
2598 * streams is open without FILE_SHARE_DELETE
2599 */
2600 status = open_streams_for_delete(conn, fname);
2601
2602 if (!NT_STATUS_IS_OK(status)) {
2603 goto fail;
2604 }
2605 }
2606
2607 /* This is the correct thing to do (check every time) but can_delete
2608 * is expensive (it may have to read the parent directory
2609 * permissions). So for now we're not doing it unless we have a strong
2610 * hint the client is really going to delete this file. If the client
2611 * is forcing FILE_CREATE let the filesystem take care of the
2612 * permissions. */
2613
2614 /* Setting FILE_SHARE_DELETE is the hint. */
2615
2616 if (lp_acl_check_permissions(SNUM(conn))
2617 && (create_disposition != FILE_CREATE)
2618 && (share_access & FILE_SHARE_DELETE)
2619 && (access_mask & DELETE_ACCESS)
2620 && (!can_delete_file_in_directory(conn, fname))) {
2621 status = NT_STATUS_ACCESS_DENIED;
2622 goto fail;
2623 }
2624
2625 #if 0
2626 /* We need to support SeSecurityPrivilege for this. */
2627 if ((access_mask & SEC_RIGHT_SYSTEM_SECURITY) &&
2628 !user_has_privileges(current_user.nt_user_token,
2629 &se_security)) {
2630 status = NT_STATUS_PRIVILEGE_NOT_HELD;
2631 goto fail;
2632 }
2633 #endif
2634
2635 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2636 && is_ntfs_stream_name(fname)
2637 && (!(create_options & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
2638 char *base;
2639 uint32 base_create_disposition;
2640
2641 if (create_options & FILE_DIRECTORY_FILE) {
2642 status = NT_STATUS_NOT_A_DIRECTORY;
2643 goto fail;
2644 }
2645
2646 status = split_ntfs_stream_name(talloc_tos(), fname,
2647 &base, NULL);
2648 if (!NT_STATUS_IS_OK(status)) {
2649 DEBUG(10, ("create_file_unixpath: "
2650 "split_ntfs_stream_name failed: %s\n",
2651 nt_errstr(status)));
2652 goto fail;
2653 }
2654
2655 SMB_ASSERT(!is_ntfs_stream_name(base)); /* paranoia.. */
2656
2657 switch (create_disposition) {
2658 case FILE_OPEN:
2659 base_create_disposition = FILE_OPEN;
2660 break;
2661 default:
2662 base_create_disposition = FILE_OPEN_IF;
2663 break;
2664 }
2665
2666 status = create_file_unixpath(conn, NULL, base, 0,
2667 FILE_SHARE_READ
2668 | FILE_SHARE_WRITE
2669 | FILE_SHARE_DELETE,
2670 base_create_disposition,
2671 0, 0, 0, 0, NULL, NULL,
2672 &base_fsp, NULL, NULL);
2673 if (!NT_STATUS_IS_OK(status)) {
2674 DEBUG(10, ("create_file_unixpath for base %s failed: "
2675 "%s\n", base, nt_errstr(status)));
2676 goto fail;
2677 }
2678 }
2679
2680 /*
2681 * If it's a request for a directory open, deal with it separately.
2682 */
2683
2684 if (create_options & FILE_DIRECTORY_FILE) {
2685
2686 if (create_options & FILE_NON_DIRECTORY_FILE) {
2687 status = NT_STATUS_INVALID_PARAMETER;
2688 goto fail;
2689 }
2690
2691 /* Can't open a temp directory. IFS kit test. */
2692 if (file_attributes & FILE_ATTRIBUTE_TEMPORARY) {
2693 status = NT_STATUS_INVALID_PARAMETER;
2694 goto fail;
2695 }
2696
2697 /*
2698 * We will get a create directory here if the Win32
2699 * app specified a security descriptor in the
2700 * CreateDirectory() call.
2701 */
2702
2703 oplock_request = 0;
2704 status = open_directory(
2705 conn, req, fname, &sbuf, access_mask, share_access,
2706 create_disposition, create_options, file_attributes,
2707 &info, &fsp);
2708 } else {
2709
2710 /*
2711 * Ordinary file case.
2712 */
2713
2714 status = open_file_ntcreate(
2715 conn, req, fname, &sbuf, access_mask, share_access,
2716 create_disposition, create_options, file_attributes,
2717 oplock_request, &info, &fsp);
2718
2719 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
2720
2721 /*
2722 * Fail the open if it was explicitly a non-directory
2723 * file.
2724 */
2725
2726 if (create_options & FILE_NON_DIRECTORY_FILE) {
2727 status = NT_STATUS_FILE_IS_A_DIRECTORY;
2728 goto fail;
2729 }
2730
2731 oplock_request = 0;
2732 status = open_directory(
2733 conn, req, fname, &sbuf, access_mask,
2734 share_access, create_disposition,
2735 create_options, file_attributes,
2736 &info, &fsp);
2737 }
2738 }
2739
2740 if (!NT_STATUS_IS_OK(status)) {
2741 goto fail;
2742 }
2743
2744 /*
2745 * According to the MS documentation, the only time the security
2746 * descriptor is applied to the opened file is iff we *created* the
2747 * file; an existing file stays the same.
2748 *
2749 * Also, it seems (from observation) that you can open the file with
2750 * any access mask but you can still write the sd. We need to override
2751 * the granted access before we call set_sd
2752 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
2753 */
2754
2755 if ((sd != NULL) && (info == FILE_WAS_CREATED)
2756 && lp_nt_acl_support(SNUM(conn))) {
2757
2758 uint32_t sec_info_sent = ALL_SECURITY_INFORMATION;
2759 uint32_t saved_access_mask = fsp->access_mask;
2760
2761 if (sd->owner_sid == NULL) {
2762 sec_info_sent &= ~OWNER_SECURITY_INFORMATION;
2763 }
2764 if (sd->group_sid == NULL) {
2765 sec_info_sent &= ~GROUP_SECURITY_INFORMATION;
2766 }
2767 if (sd->sacl == NULL) {
2768 sec_info_sent &= ~SACL_SECURITY_INFORMATION;
2769 }
2770 if (sd->dacl == NULL) {
2771 sec_info_sent &= ~DACL_SECURITY_INFORMATION;
2772 }
2773
2774 fsp->access_mask = FILE_GENERIC_ALL;
2775
2776 /* Convert all the generic bits. */
2777 security_acl_map_generic(sd->dacl, &file_generic_mapping);
2778 security_acl_map_generic(sd->sacl, &file_generic_mapping);
2779
2780 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
2781
2782 fsp->access_mask = saved_access_mask;
2783
2784 if (!NT_STATUS_IS_OK(status)) {
2785 goto fail;
2786 }
2787 }
2788
2789 if ((ea_list != NULL) && (info == FILE_WAS_CREATED)) {
2790 status = set_ea(conn, fsp, fname, ea_list);
2791 if (!NT_STATUS_IS_OK(status)) {
2792 goto fail;
2793 }
2794 }
2795
2796 if (!fsp->is_directory && S_ISDIR(sbuf.st_mode)) {
2797 status = NT_STATUS_ACCESS_DENIED;
2798 goto fail;
2799 }
2800
2801 /* Save the requested allocation size. */
2802 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
2803 if (allocation_size
2804 && (allocation_size > sbuf.st_size)) {
2805 fsp->initial_allocation_size = smb_roundup(
2806 fsp->conn, allocation_size);
2807 if (fsp->is_directory) {
2808 /* Can't set allocation size on a directory. */
2809 status = NT_STATUS_ACCESS_DENIED;
2810 goto fail;
2811 }
2812 if (vfs_allocate_file_space(
2813 fsp, fsp->initial_allocation_size) == -1) {
2814 status = NT_STATUS_DISK_FULL;
2815 goto fail;
2816 }
2817 } else {
2818 fsp->initial_allocation_size = smb_roundup(
2819 fsp->conn, (SMB_BIG_UINT)sbuf.st_size);
2820 }
2821 }
2822
2823 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
2824
2825 /*
2826 * Set fsp->base_fsp late enough that we can't "goto fail" anymore. In
2827 * the fail: branch we call close_file(fsp, ERROR_CLOSE) which would
2828 * also close fsp->base_fsp which we have to also do explicitly in
2829 * this routine here, as not in all "goto fail:" we have the fsp set
2830 * up already to be initialized with the base_fsp.
2831 */
2832
2833 fsp->base_fsp = base_fsp;
2834
2835 *result = fsp;
2836 if (pinfo != NULL) {
2837 *pinfo = info;
2838 }
2839 if (psbuf != NULL) {
2840 if ((fsp->fh == NULL) || (fsp->fh->fd == -1)) {
2841 *psbuf = sbuf;
2842 }
2843 else {
2844 SMB_VFS_FSTAT(fsp, psbuf);
2845 }
2846 }
2847 return NT_STATUS_OK;
2848
2849 fail:
2850 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
2851
2852 if (fsp != NULL) {
2853 close_file(fsp, ERROR_CLOSE);
2854 fsp = NULL;
2855 }
2856 if (base_fsp != NULL) {
2857 close_file(base_fsp, ERROR_CLOSE);
2858 base_fsp = NULL;
2859 }
2860 return status;
2861 }
2862
2863 NTSTATUS create_file(connection_struct *conn,
2864 struct smb_request *req,
2865 uint16_t root_dir_fid,
2866 const char *fname,
2867 uint32_t access_mask,
2868 uint32_t share_access,
2869 uint32_t create_disposition,
2870 uint32_t create_options,
2871 uint32_t file_attributes,
2872 uint32_t oplock_request,
2873 SMB_BIG_UINT allocation_size,
2874 struct security_descriptor *sd,
2875 struct ea_list *ea_list,
2876
2877 files_struct **result,
2878 int *pinfo,
2879 SMB_STRUCT_STAT *psbuf)
2880 {
2881 struct case_semantics_state *case_state = NULL;
2882 SMB_STRUCT_STAT sbuf;
2883 int info = FILE_WAS_OPENED;
2884 files_struct *fsp = NULL;
2885 NTSTATUS status;
2886
2887 DEBUG(10,("create_file: access_mask = 0x%x "
2888 "file_attributes = 0x%x, share_access = 0x%x, "
2889 "create_disposition = 0x%x create_options = 0x%x "
2890 "oplock_request = 0x%x "
2891 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
2892 "fname = %s\n",
2893 (unsigned int)access_mask,
2894 (unsigned int)file_attributes,
2895 (unsigned int)share_access,
2896 (unsigned int)create_disposition,
2897 (unsigned int)create_options,
2898 (unsigned int)oplock_request,
2899 (unsigned int)root_dir_fid,
2900 ea_list, sd, fname));
2901
2902 /*
2903 * Get the file name.
2904 */
2905
2906 if (root_dir_fid != 0) {
2907 /*
2908 * This filename is relative to a directory fid.
2909 */
2910 char *parent_fname = NULL;
2911 files_struct *dir_fsp = file_fsp(root_dir_fid);
2912
2913 if (dir_fsp == NULL) {
2914 status = NT_STATUS_INVALID_HANDLE;
2915 goto fail;
2916 }
2917
2918 if (!dir_fsp->is_directory) {
2919
2920 /*
2921 * Check to see if this is a mac fork of some kind.
2922 */
2923
2924 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2925 is_ntfs_stream_name(fname)) {
2926 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
2927 goto fail;
2928 }
2929
2930 /*
2931 we need to handle the case when we get a
2932 relative open relative to a file and the
2933 pathname is blank - this is a reopen!
2934 (hint from demyn plantenberg)
2935 */
2936
2937 status = NT_STATUS_INVALID_HANDLE;
2938 goto fail;
2939 }
2940
2941 if (ISDOT(dir_fsp->fsp_name)) {
2942 /*
2943 * We're at the toplevel dir, the final file name
2944 * must not contain ./, as this is filtered out
2945 * normally by srvstr_get_path and unix_convert
2946 * explicitly rejects paths containing ./.
2947 */
2948 parent_fname = talloc_strdup(talloc_tos(), "");
2949 if (parent_fname == NULL) {
2950 status = NT_STATUS_NO_MEMORY;
2951 goto fail;
2952 }
2953 } else {
2954 size_t dir_name_len = strlen(dir_fsp->fsp_name);
2955
2956 /*
2957 * Copy in the base directory name.
2958 */
2959
2960 parent_fname = TALLOC_ARRAY(talloc_tos(), char,
2961 dir_name_len+2);
2962 if (parent_fname == NULL) {
2963 status = NT_STATUS_NO_MEMORY;
2964 goto fail;
2965 }
2966 memcpy(parent_fname, dir_fsp->fsp_name,
2967 dir_name_len+1);
2968
2969 /*
2970 * Ensure it ends in a '/'.
2971 * We used TALLOC_SIZE +2 to add space for the '/'.
2972 */
2973
2974 if(dir_name_len
2975 && (parent_fname[dir_name_len-1] != '\\')
2976 && (parent_fname[dir_name_len-1] != '/')) {
2977 parent_fname[dir_name_len] = '/';
2978 parent_fname[dir_name_len+1] = '\0';
2979 }
2980 }
2981
2982 fname = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
2983 fname);
2984 if (fname == NULL) {
2985 status = NT_STATUS_NO_MEMORY;
2986 goto fail;
2987 }
2988 }
2989
2990 /*
2991 * Check to see if this is a mac fork of some kind.
2992 */
2993
2994 if (is_ntfs_stream_name(fname)) {
2995 enum FAKE_FILE_TYPE fake_file_type;
2996
2997 fake_file_type = is_fake_file(fname);
2998
2999 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3000
3001 /*
3002 * Here we go! support for changing the disk quotas
3003 * --metze
3004 *
3005 * We need to fake up to open this MAGIC QUOTA file
3006 * and return a valid FID.
3007 *
3008 * w2k close this file directly after openening xp
3009 * also tries a QUERY_FILE_INFO on the file and then
3010 * close it
3011 */
3012 status = open_fake_file(conn, req->vuid,
3013 fake_file_type, fname,
3014 access_mask, &fsp);
3015 if (!NT_STATUS_IS_OK(status)) {
3016 goto fail;
3017 }
3018
3019 ZERO_STRUCT(sbuf);
3020 goto done;
3021 }
3022
3023 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3024 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3025 goto fail;
3026 }
3027 }
3028
3029 if ((req != NULL) && (req->flags2 & FLAGS2_DFS_PATHNAMES)) {
3030 char *resolved_fname;
3031
3032 status = resolve_dfspath(talloc_tos(), conn, true, fname,
3033 &resolved_fname);
3034
3035 if (!NT_STATUS_IS_OK(status)) {
3036 /*
3037 * For PATH_NOT_COVERED we had
3038 * reply_botherror(req, NT_STATUS_PATH_NOT_COVERED,
3039 * ERRSRV, ERRbadpath);
3040 * Need to fix in callers
3041 */
3042 goto fail;
3043 }
3044 fname = resolved_fname;
3045 }
3046
3047 /*
3048 * Check if POSIX semantics are wanted.
3049 */
3050
3051 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3052 case_state = set_posix_case_semantics(talloc_tos(), conn);
3053 file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
3054 }
3055
3056 {
3057 char *converted_fname;
3058
3059 SET_STAT_INVALID(sbuf);
3060
3061 status = unix_convert(talloc_tos(), conn, fname, False,
3062 &converted_fname, NULL, &sbuf);
3063 if (!NT_STATUS_IS_OK(status)) {
3064 goto fail;
3065 }
3066 fname = converted_fname;
3067 }
3068
3069 TALLOC_FREE(case_state);
3070
3071 /* All file access must go through check_name() */
3072
3073 status = check_name(conn, fname);
3074 if (!NT_STATUS_IS_OK(status)) {
3075 goto fail;
3076 }
3077
3078 status = create_file_unixpath(
3079 conn, req, fname, access_mask, share_access,
3080 create_disposition, create_options, file_attributes,
3081 oplock_request, allocation_size, sd, ea_list,
3082 &fsp, &info, &sbuf);
3083
3084 if (!NT_STATUS_IS_OK(status)) {
3085 goto fail;
3086 }
3087
3088 done:
3089 DEBUG(10, ("create_file: info=%d\n", info));
3090
3091 *result = fsp;
3092 if (pinfo != NULL) {
3093 *pinfo = info;
3094 }
3095 if (psbuf != NULL) {
3096 *psbuf = sbuf;
3097 }
3098 return NT_STATUS_OK;
3099
3100 fail:
3101 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3102
3103 if (fsp != NULL) {
3104 close_file(fsp, ERROR_CLOSE);
3105 fsp = NULL;
3106 }
3107 return status;
3108 }
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