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Add back mem leak fixes
[Samba.git] / source3 / smbd / open.c
blobaa3bbdf6857dec7444d5473350c943b701131478
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 && (is_ntfs_stream_name(fname)
1856 || can_set_initial_delete_on_close(lck))) {
1857 status = can_set_delete_on_close(fsp, True, new_dos_attributes);
1858
1859 if (!NT_STATUS_IS_OK(status)) {
1860 /* Remember to delete the mode we just added. */
1861 del_share_mode(lck, fsp);
1862 TALLOC_FREE(lck);
1863 fd_close(fsp);
1864 file_free(fsp);
1865 return status;
1866 }
1867 /* Note that here we set the *inital* delete on close flag,
1868 not the regular one. The magic gets handled in close. */
1869 fsp->initial_delete_on_close = True;
1870 }
1871
1872 if (new_file_created) {
1873 /* Files should be initially set as archive */
1874 if (lp_map_archive(SNUM(conn)) ||
1875 lp_store_dos_attributes(SNUM(conn))) {
1876 if (!posix_open) {
1877 SMB_STRUCT_STAT tmp_sbuf;
1878 SET_STAT_INVALID(tmp_sbuf);
1879 if (file_set_dosmode(
1880 conn, fname,
1881 new_dos_attributes | aARCH,
1882 &tmp_sbuf, parent_dir,
1883 true) == 0) {
1884 unx_mode = tmp_sbuf.st_mode;
1885 }
1886 }
1887 }
1888 }
1889
1890 /*
1891 * Take care of inherited ACLs on created files - if default ACL not
1892 * selected.
1893 */
1894
1895 if (!posix_open && !file_existed && !def_acl) {
1896
1897 int saved_errno = errno; /* We might get ENOSYS in the next
1898 * call.. */
1899
1900 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
1901 errno == ENOSYS) {
1902 errno = saved_errno; /* Ignore ENOSYS */
1903 }
1904
1905 } else if (new_unx_mode) {
1906
1907 int ret = -1;
1908
1909 /* Attributes need changing. File already existed. */
1910
1911 {
1912 int saved_errno = errno; /* We might get ENOSYS in the
1913 * next call.. */
1914 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
1915
1916 if (ret == -1 && errno == ENOSYS) {
1917 errno = saved_errno; /* Ignore ENOSYS */
1918 } else {
1919 DEBUG(5, ("open_file_ntcreate: reset "
1920 "attributes of file %s to 0%o\n",
1921 fname, (unsigned int)new_unx_mode));
1922 ret = 0; /* Don't do the fchmod below. */
1923 }
1924 }
1925
1926 if ((ret == -1) &&
1927 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
1928 DEBUG(5, ("open_file_ntcreate: failed to reset "
1929 "attributes of file %s to 0%o\n",
1930 fname, (unsigned int)new_unx_mode));
1931 }
1932
1933 /* If this is a successful open, we must remove any deferred open
1934 * records. */
1935 if (req != NULL) {
1936 del_deferred_open_entry(lck, req->mid);
1937 }
1938 TALLOC_FREE(lck);
1939
1940 conn->num_files_open++;
1941
1942 *result = fsp;
1943 return NT_STATUS_OK;
1944 }
1945
1946 /****************************************************************************
1947 Open a file for for write to ensure that we can fchmod it.
1948 ****************************************************************************/
1949
1950 NTSTATUS open_file_fchmod(connection_struct *conn, const char *fname,
1951 SMB_STRUCT_STAT *psbuf, files_struct **result)
1952 {
1953 files_struct *fsp = NULL;
1954 NTSTATUS status;
1955
1956 if (!VALID_STAT(*psbuf)) {
1957 return NT_STATUS_INVALID_PARAMETER;
1958 }
1959
1960 status = file_new(conn, &fsp);
1961 if(!NT_STATUS_IS_OK(status)) {
1962 return status;
1963 }
1964
1965 /* note! we must use a non-zero desired access or we don't get
1966 a real file descriptor. Oh what a twisted web we weave. */
1967 status = open_file(fsp, conn, NULL, NULL, NULL, fname, psbuf, O_WRONLY,
1968 0, FILE_WRITE_DATA, FILE_WRITE_DATA);
1969
1970 /*
1971 * This is not a user visible file open.
1972 * Don't set a share mode and don't increment
1973 * the conn->num_files_open.
1974 */
1975
1976 if (!NT_STATUS_IS_OK(status)) {
1977 file_free(fsp);
1978 return status;
1979 }
1980
1981 *result = fsp;
1982 return NT_STATUS_OK;
1983 }
1984
1985 /****************************************************************************
1986 Close the fchmod file fd - ensure no locks are lost.
1987 ****************************************************************************/
1988
1989 NTSTATUS close_file_fchmod(files_struct *fsp)
1990 {
1991 NTSTATUS status = fd_close(fsp);
1992 file_free(fsp);
1993 return status;
1994 }
1995
1996 static NTSTATUS mkdir_internal(connection_struct *conn,
1997 const char *name,
1998 uint32 file_attributes,
1999 SMB_STRUCT_STAT *psbuf)
2000 {
2001 mode_t mode;
2002 char *parent_dir;
2003 const char *dirname;
2004 NTSTATUS status;
2005 bool posix_open = false;
2006
2007 if(!CAN_WRITE(conn)) {
2008 DEBUG(5,("mkdir_internal: failing create on read-only share "
2009 "%s\n", lp_servicename(SNUM(conn))));
2010 return NT_STATUS_ACCESS_DENIED;
2011 }
2012
2013 status = check_name(conn, name);
2014 if (!NT_STATUS_IS_OK(status)) {
2015 return status;
2016 }
2017
2018 if (!parent_dirname_talloc(talloc_tos(), name, &parent_dir,
2019 &dirname)) {
2020 return NT_STATUS_NO_MEMORY;
2021 }
2022
2023 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2024 posix_open = true;
2025 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2026 } else {
2027 mode = unix_mode(conn, aDIR, name, parent_dir);
2028 }
2029
2030 if (SMB_VFS_MKDIR(conn, name, mode) != 0) {
2031 return map_nt_error_from_unix(errno);
2032 }
2033
2034 /* Ensure we're checking for a symlink here.... */
2035 /* We don't want to get caught by a symlink racer. */
2036
2037 if (SMB_VFS_LSTAT(conn, name, psbuf) == -1) {
2038 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2039 name, strerror(errno)));
2040 return map_nt_error_from_unix(errno);
2041 }
2042
2043 if (!S_ISDIR(psbuf->st_mode)) {
2044 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2045 name));
2046 return NT_STATUS_ACCESS_DENIED;
2047 }
2048
2049 if (lp_store_dos_attributes(SNUM(conn))) {
2050 if (!posix_open) {
2051 file_set_dosmode(conn, name,
2052 file_attributes | aDIR, NULL,
2053 parent_dir,
2054 true);
2055 }
2056 }
2057
2058 if (lp_inherit_perms(SNUM(conn))) {
2059 inherit_access_posix_acl(conn, parent_dir, name, mode);
2060 }
2061
2062 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2063 /*
2064 * Check if high bits should have been set,
2065 * then (if bits are missing): add them.
2066 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2067 * dir.
2068 */
2069 if (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO) && (mode & ~psbuf->st_mode)) {
2070 SMB_VFS_CHMOD(conn, name,
2071 psbuf->st_mode | (mode & ~psbuf->st_mode));
2072 }
2073 }
2074
2075 /* Change the owner if required. */
2076 if (lp_inherit_owner(SNUM(conn))) {
2077 change_dir_owner_to_parent(conn, parent_dir, name, psbuf);
2078 }
2079
2080 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2081 name);
2082
2083 return NT_STATUS_OK;
2084 }
2085
2086 /****************************************************************************
2087 Open a directory from an NT SMB call.
2088 ****************************************************************************/
2089
2090 NTSTATUS open_directory(connection_struct *conn,
2091 struct smb_request *req,
2092 const char *fname,
2093 SMB_STRUCT_STAT *psbuf,
2094 uint32 access_mask,
2095 uint32 share_access,
2096 uint32 create_disposition,
2097 uint32 create_options,
2098 uint32 file_attributes,
2099 int *pinfo,
2100 files_struct **result)
2101 {
2102 files_struct *fsp = NULL;
2103 bool dir_existed = VALID_STAT(*psbuf) ? True : False;
2104 struct share_mode_lock *lck = NULL;
2105 NTSTATUS status;
2106 struct timespec mtimespec;
2107 int info = 0;
2108
2109 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2110 "share_access = 0x%x create_options = 0x%x, "
2111 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2112 fname,
2113 (unsigned int)access_mask,
2114 (unsigned int)share_access,
2115 (unsigned int)create_options,
2116 (unsigned int)create_disposition,
2117 (unsigned int)file_attributes));
2118
2119 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) && is_ntfs_stream_name(fname)) {
2120 DEBUG(2, ("open_directory: %s is a stream name!\n", fname));
2121 return NT_STATUS_NOT_A_DIRECTORY;
2122 }
2123
2124 switch( create_disposition ) {
2125 case FILE_OPEN:
2126
2127 info = FILE_WAS_OPENED;
2128
2129 /*
2130 * We want to follow symlinks here.
2131 */
2132
2133 if (SMB_VFS_STAT(conn, fname, psbuf) != 0) {
2134 return map_nt_error_from_unix(errno);
2135 }
2136
2137 break;
2138
2139 case FILE_CREATE:
2140
2141 /* If directory exists error. If directory doesn't
2142 * exist create. */
2143
2144 status = mkdir_internal(conn,
2145 fname,
2146 file_attributes,
2147 psbuf);
2148
2149 if (!NT_STATUS_IS_OK(status)) {
2150 DEBUG(2, ("open_directory: unable to create "
2151 "%s. Error was %s\n", fname,
2152 nt_errstr(status)));
2153 return status;
2154 }
2155
2156 info = FILE_WAS_CREATED;
2157 break;
2158
2159 case FILE_OPEN_IF:
2160 /*
2161 * If directory exists open. If directory doesn't
2162 * exist create.
2163 */
2164
2165 status = mkdir_internal(conn,
2166 fname,
2167 file_attributes,
2168 psbuf);
2169
2170 if (NT_STATUS_IS_OK(status)) {
2171 info = FILE_WAS_CREATED;
2172 }
2173
2174 if (NT_STATUS_EQUAL(status,
2175 NT_STATUS_OBJECT_NAME_COLLISION)) {
2176 info = FILE_WAS_OPENED;
2177 status = NT_STATUS_OK;
2178 }
2179
2180 break;
2181
2182 case FILE_SUPERSEDE:
2183 case FILE_OVERWRITE:
2184 case FILE_OVERWRITE_IF:
2185 default:
2186 DEBUG(5,("open_directory: invalid create_disposition "
2187 "0x%x for directory %s\n",
2188 (unsigned int)create_disposition, fname));
2189 return NT_STATUS_INVALID_PARAMETER;
2190 }
2191
2192 if(!S_ISDIR(psbuf->st_mode)) {
2193 DEBUG(5,("open_directory: %s is not a directory !\n",
2194 fname ));
2195 return NT_STATUS_NOT_A_DIRECTORY;
2196 }
2197
2198 status = file_new(conn, &fsp);
2199 if(!NT_STATUS_IS_OK(status)) {
2200 return status;
2201 }
2202
2203 /*
2204 * Setup the files_struct for it.
2205 */
2206
2207 fsp->mode = psbuf->st_mode;
2208 fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
2209 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2210 fsp->file_pid = req ? req->smbpid : 0;
2211 fsp->can_lock = False;
2212 fsp->can_read = False;
2213 fsp->can_write = False;
2214
2215 fsp->share_access = share_access;
2216 fsp->fh->private_options = create_options;
2217 fsp->access_mask = access_mask;
2218
2219 fsp->print_file = False;
2220 fsp->modified = False;
2221 fsp->oplock_type = NO_OPLOCK;
2222 fsp->sent_oplock_break = NO_BREAK_SENT;
2223 fsp->is_directory = True;
2224 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2225
2226 string_set(&fsp->fsp_name,fname);
2227
2228 mtimespec = get_mtimespec(psbuf);
2229
2230 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2231 conn->connectpath,
2232 fname, &mtimespec);
2233
2234 if (lck == NULL) {
2235 DEBUG(0, ("open_directory: Could not get share mode lock for %s\n", fname));
2236 file_free(fsp);
2237 return NT_STATUS_SHARING_VIOLATION;
2238 }
2239
2240 status = open_mode_check(conn, fname, lck,
2241 access_mask, share_access,
2242 create_options, &dir_existed);
2243
2244 if (!NT_STATUS_IS_OK(status)) {
2245 TALLOC_FREE(lck);
2246 file_free(fsp);
2247 return status;
2248 }
2249
2250 set_share_mode(lck, fsp, conn->server_info->utok.uid, 0, NO_OPLOCK,
2251 True);
2252
2253 /* For directories the delete on close bit at open time seems
2254 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2255 if (create_options & FILE_DELETE_ON_CLOSE) {
2256 status = can_set_delete_on_close(fsp, True, 0);
2257 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2258 TALLOC_FREE(lck);
2259 file_free(fsp);
2260 return status;
2261 }
2262
2263 if (NT_STATUS_IS_OK(status)) {
2264 /* Note that here we set the *inital* delete on close flag,
2265 not the regular one. The magic gets handled in close. */
2266 fsp->initial_delete_on_close = True;
2267 }
2268 }
2269
2270 TALLOC_FREE(lck);
2271
2272 if (pinfo) {
2273 *pinfo = info;
2274 }
2275
2276 conn->num_files_open++;
2277
2278 *result = fsp;
2279 return NT_STATUS_OK;
2280 }
2281
2282 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req, const char *directory)
2283 {
2284 NTSTATUS status;
2285 SMB_STRUCT_STAT sbuf;
2286 files_struct *fsp;
2287
2288 SET_STAT_INVALID(sbuf);
2289
2290 status = open_directory(conn, req, directory, &sbuf,
2291 FILE_READ_ATTRIBUTES, /* Just a stat open */
2292 FILE_SHARE_NONE, /* Ignored for stat opens */
2293 FILE_CREATE,
2294 0,
2295 FILE_ATTRIBUTE_DIRECTORY,
2296 NULL,
2297 &fsp);
2298
2299 if (NT_STATUS_IS_OK(status)) {
2300 close_file(fsp, NORMAL_CLOSE);
2301 }
2302
2303 return status;
2304 }
2305
2306 /****************************************************************************
2307 Receive notification that one of our open files has been renamed by another
2308 smbd process.
2309 ****************************************************************************/
2310
2311 void msg_file_was_renamed(struct messaging_context *msg,
2312 void *private_data,
2313 uint32_t msg_type,
2314 struct server_id server_id,
2315 DATA_BLOB *data)
2316 {
2317 files_struct *fsp;
2318 char *frm = (char *)data->data;
2319 struct file_id id;
2320 const char *sharepath;
2321 const char *newname;
2322 size_t sp_len;
2323
2324 if (data->data == NULL
2325 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2326 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2327 (int)data->length));
2328 return;
2329 }
2330
2331 /* Unpack the message. */
2332 pull_file_id_16(frm, &id);
2333 sharepath = &frm[16];
2334 newname = sharepath + strlen(sharepath) + 1;
2335 sp_len = strlen(sharepath);
2336
2337 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2338 "file_id %s\n",
2339 sharepath, newname, file_id_string_tos(&id)));
2340
2341 for(fsp = file_find_di_first(id); fsp; fsp = file_find_di_next(fsp)) {
2342 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2343 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2344 fsp->fnum, fsp->fsp_name, newname ));
2345 string_set(&fsp->fsp_name, newname);
2346 } else {
2347 /* TODO. JRA. */
2348 /* Now we have the complete path we can work out if this is
2349 actually within this share and adjust newname accordingly. */
2350 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2351 "not sharepath %s) "
2352 "fnum %d from %s -> %s\n",
2353 fsp->conn->connectpath,
2354 sharepath,
2355 fsp->fnum,
2356 fsp->fsp_name,
2357 newname ));
2358 }
2359 }
2360 }
2361
2362 struct case_semantics_state {
2363 connection_struct *conn;
2364 bool case_sensitive;
2365 bool case_preserve;
2366 bool short_case_preserve;
2367 };
2368
2369 /****************************************************************************
2370 Restore case semantics.
2371 ****************************************************************************/
2372 static int restore_case_semantics(struct case_semantics_state *state)
2373 {
2374 state->conn->case_sensitive = state->case_sensitive;
2375 state->conn->case_preserve = state->case_preserve;
2376 state->conn->short_case_preserve = state->short_case_preserve;
2377 return 0;
2378 }
2379
2380 /****************************************************************************
2381 Save case semantics.
2382 ****************************************************************************/
2383 static struct case_semantics_state *set_posix_case_semantics(TALLOC_CTX *mem_ctx,
2384 connection_struct *conn)
2385 {
2386 struct case_semantics_state *result;
2387
2388 if (!(result = talloc(mem_ctx, struct case_semantics_state))) {
2389 DEBUG(0, ("talloc failed\n"));
2390 return NULL;
2391 }
2392
2393 result->conn = conn;
2394 result->case_sensitive = conn->case_sensitive;
2395 result->case_preserve = conn->case_preserve;
2396 result->short_case_preserve = conn->short_case_preserve;
2397
2398 /* Set to POSIX. */
2399 conn->case_sensitive = True;
2400 conn->case_preserve = True;
2401 conn->short_case_preserve = True;
2402
2403 talloc_set_destructor(result, restore_case_semantics);
2404
2405 return result;
2406 }
2407
2408 /*
2409 * If a main file is opened for delete, all streams need to be checked for
2410 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2411 * If that works, delete them all by setting the delete on close and close.
2412 */
2413
2414 static NTSTATUS open_streams_for_delete(connection_struct *conn,
2415 const char *fname)
2416 {
2417 struct stream_struct *stream_info;
2418 files_struct **streams;
2419 int i;
2420 unsigned int num_streams;
2421 TALLOC_CTX *frame = talloc_stackframe();
2422 NTSTATUS status;
2423
2424 status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
2425 &num_streams, &stream_info);
2426
2427 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2428 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2429 DEBUG(10, ("no streams around\n"));
2430 TALLOC_FREE(frame);
2431 return NT_STATUS_OK;
2432 }
2433
2434 if (!NT_STATUS_IS_OK(status)) {
2435 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
2436 nt_errstr(status)));
2437 goto fail;
2438 }
2439
2440 DEBUG(10, ("open_streams_for_delete found %d streams\n",
2441 num_streams));
2442
2443 if (num_streams == 0) {
2444 TALLOC_FREE(frame);
2445 return NT_STATUS_OK;
2446 }
2447
2448 streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
2449 if (streams == NULL) {
2450 DEBUG(0, ("talloc failed\n"));
2451 status = NT_STATUS_NO_MEMORY;
2452 goto fail;
2453 }
2454
2455 for (i=0; i<num_streams; i++) {
2456 char *streamname;
2457
2458 if (strequal(stream_info[i].name, "::$DATA")) {
2459 streams[i] = NULL;
2460 continue;
2461 }
2462
2463 streamname = talloc_asprintf(talloc_tos(), "%s%s", fname,
2464 stream_info[i].name);
2465
2466 if (streamname == NULL) {
2467 DEBUG(0, ("talloc_aprintf failed\n"));
2468 status = NT_STATUS_NO_MEMORY;
2469 goto fail;
2470 }
2471
2472 status = create_file_unixpath
2473 (conn, /* conn */
2474 NULL, /* req */
2475 streamname, /* fname */
2476 DELETE_ACCESS, /* access_mask */
2477 FILE_SHARE_READ | FILE_SHARE_WRITE
2478 | FILE_SHARE_DELETE, /* share_access */
2479 FILE_OPEN, /* create_disposition*/
2480 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* create_options */
2481 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
2482 0, /* oplock_request */
2483 0, /* allocation_size */
2484 NULL, /* sd */
2485 NULL, /* ea_list */
2486 &streams[i], /* result */
2487 NULL, /* pinfo */
2488 NULL); /* psbuf */
2489
2490 TALLOC_FREE(streamname);
2491
2492 if (!NT_STATUS_IS_OK(status)) {
2493 DEBUG(10, ("Could not open stream %s: %s\n",
2494 streamname, nt_errstr(status)));
2495 break;
2496 }
2497 }
2498
2499 /*
2500 * don't touch the variable "status" beyond this point :-)
2501 */
2502
2503 for (i -= 1 ; i >= 0; i--) {
2504 if (streams[i] == NULL) {
2505 continue;
2506 }
2507
2508 DEBUG(10, ("Closing stream # %d, %s\n", i,
2509 streams[i]->fsp_name));
2510 close_file(streams[i], NORMAL_CLOSE);
2511 }
2512
2513 fail:
2514 TALLOC_FREE(frame);
2515 return status;
2516 }
2517
2518 /*
2519 * Wrapper around open_file_ntcreate and open_directory
2520 */
2521
2522 NTSTATUS create_file_unixpath(connection_struct *conn,
2523 struct smb_request *req,
2524 const char *fname,
2525 uint32_t access_mask,
2526 uint32_t share_access,
2527 uint32_t create_disposition,
2528 uint32_t create_options,
2529 uint32_t file_attributes,
2530 uint32_t oplock_request,
2531 SMB_BIG_UINT allocation_size,
2532 struct security_descriptor *sd,
2533 struct ea_list *ea_list,
2534
2535 files_struct **result,
2536 int *pinfo,
2537 SMB_STRUCT_STAT *psbuf)
2538 {
2539 SMB_STRUCT_STAT sbuf;
2540 int info = FILE_WAS_OPENED;
2541 files_struct *base_fsp = NULL;
2542 files_struct *fsp = NULL;
2543 NTSTATUS status;
2544
2545 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
2546 "file_attributes = 0x%x, share_access = 0x%x, "
2547 "create_disposition = 0x%x create_options = 0x%x "
2548 "oplock_request = 0x%x ea_list = 0x%p, sd = 0x%p, "
2549 "fname = %s\n",
2550 (unsigned int)access_mask,
2551 (unsigned int)file_attributes,
2552 (unsigned int)share_access,
2553 (unsigned int)create_disposition,
2554 (unsigned int)create_options,
2555 (unsigned int)oplock_request,
2556 ea_list, sd, fname));
2557
2558 if (create_options & FILE_OPEN_BY_FILE_ID) {
2559 status = NT_STATUS_NOT_SUPPORTED;
2560 goto fail;
2561 }
2562
2563 if (req == NULL) {
2564 oplock_request |= INTERNAL_OPEN_ONLY;
2565 }
2566
2567 if (psbuf != NULL) {
2568 sbuf = *psbuf;
2569 }
2570 else {
2571 if (SMB_VFS_STAT(conn, fname, &sbuf) == -1) {
2572 SET_STAT_INVALID(sbuf);
2573 }
2574 }
2575
2576 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2577 && (access_mask & DELETE_ACCESS)
2578 && !is_ntfs_stream_name(fname)) {
2579 /*
2580 * We can't open a file with DELETE access if any of the
2581 * streams is open without FILE_SHARE_DELETE
2582 */
2583 status = open_streams_for_delete(conn, fname);
2584
2585 if (!NT_STATUS_IS_OK(status)) {
2586 goto fail;
2587 }
2588 }
2589
2590 /* This is the correct thing to do (check every time) but can_delete
2591 * is expensive (it may have to read the parent directory
2592 * permissions). So for now we're not doing it unless we have a strong
2593 * hint the client is really going to delete this file. If the client
2594 * is forcing FILE_CREATE let the filesystem take care of the
2595 * permissions. */
2596
2597 /* Setting FILE_SHARE_DELETE is the hint. */
2598
2599 if (lp_acl_check_permissions(SNUM(conn))
2600 && (create_disposition != FILE_CREATE)
2601 && (share_access & FILE_SHARE_DELETE)
2602 && (access_mask & DELETE_ACCESS)
2603 && (((dos_mode(conn, fname, &sbuf) & FILE_ATTRIBUTE_READONLY)
2604 && !lp_delete_readonly(SNUM(conn)))
2605 || !can_delete_file_in_directory(conn, fname))) {
2606 status = NT_STATUS_ACCESS_DENIED;
2607 goto fail;
2608 }
2609
2610 #if 0
2611 /* We need to support SeSecurityPrivilege for this. */
2612 if ((access_mask & SEC_RIGHT_SYSTEM_SECURITY) &&
2613 !user_has_privileges(current_user.nt_user_token,
2614 &se_security)) {
2615 status = NT_STATUS_PRIVILEGE_NOT_HELD;
2616 goto fail;
2617 }
2618 #endif
2619
2620 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2621 && is_ntfs_stream_name(fname)
2622 && (!(create_options & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
2623 char *base;
2624 uint32 base_create_disposition;
2625
2626 if (create_options & FILE_DIRECTORY_FILE) {
2627 status = NT_STATUS_NOT_A_DIRECTORY;
2628 goto fail;
2629 }
2630
2631 status = split_ntfs_stream_name(talloc_tos(), fname,
2632 &base, NULL);
2633 if (!NT_STATUS_IS_OK(status)) {
2634 DEBUG(10, ("create_file_unixpath: "
2635 "split_ntfs_stream_name failed: %s\n",
2636 nt_errstr(status)));
2637 goto fail;
2638 }
2639
2640 SMB_ASSERT(!is_ntfs_stream_name(base)); /* paranoia.. */
2641
2642 switch (create_disposition) {
2643 case FILE_OPEN:
2644 base_create_disposition = FILE_OPEN;
2645 break;
2646 default:
2647 base_create_disposition = FILE_OPEN_IF;
2648 break;
2649 }
2650
2651 status = create_file_unixpath(conn, NULL, base, 0,
2652 FILE_SHARE_READ
2653 | FILE_SHARE_WRITE
2654 | FILE_SHARE_DELETE,
2655 base_create_disposition,
2656 0, 0, 0, 0, NULL, NULL,
2657 &base_fsp, NULL, NULL);
2658 if (!NT_STATUS_IS_OK(status)) {
2659 DEBUG(10, ("create_file_unixpath for base %s failed: "
2660 "%s\n", base, nt_errstr(status)));
2661 goto fail;
2662 }
2663 }
2664
2665 /*
2666 * If it's a request for a directory open, deal with it separately.
2667 */
2668
2669 if (create_options & FILE_DIRECTORY_FILE) {
2670
2671 if (create_options & FILE_NON_DIRECTORY_FILE) {
2672 status = NT_STATUS_INVALID_PARAMETER;
2673 goto fail;
2674 }
2675
2676 /* Can't open a temp directory. IFS kit test. */
2677 if (file_attributes & FILE_ATTRIBUTE_TEMPORARY) {
2678 status = NT_STATUS_INVALID_PARAMETER;
2679 goto fail;
2680 }
2681
2682 /*
2683 * We will get a create directory here if the Win32
2684 * app specified a security descriptor in the
2685 * CreateDirectory() call.
2686 */
2687
2688 oplock_request = 0;
2689 status = open_directory(
2690 conn, req, fname, &sbuf, access_mask, share_access,
2691 create_disposition, create_options, file_attributes,
2692 &info, &fsp);
2693 } else {
2694
2695 /*
2696 * Ordinary file case.
2697 */
2698
2699 status = open_file_ntcreate(
2700 conn, req, fname, &sbuf, access_mask, share_access,
2701 create_disposition, create_options, file_attributes,
2702 oplock_request, &info, &fsp);
2703
2704 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
2705
2706 /*
2707 * Fail the open if it was explicitly a non-directory
2708 * file.
2709 */
2710
2711 if (create_options & FILE_NON_DIRECTORY_FILE) {
2712 status = NT_STATUS_FILE_IS_A_DIRECTORY;
2713 goto fail;
2714 }
2715
2716 oplock_request = 0;
2717 status = open_directory(
2718 conn, req, fname, &sbuf, access_mask,
2719 share_access, create_disposition,
2720 create_options, file_attributes,
2721 &info, &fsp);
2722 }
2723 }
2724
2725 if (!NT_STATUS_IS_OK(status)) {
2726 goto fail;
2727 }
2728
2729 /*
2730 * According to the MS documentation, the only time the security
2731 * descriptor is applied to the opened file is iff we *created* the
2732 * file; an existing file stays the same.
2733 *
2734 * Also, it seems (from observation) that you can open the file with
2735 * any access mask but you can still write the sd. We need to override
2736 * the granted access before we call set_sd
2737 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
2738 */
2739
2740 if ((sd != NULL) && (info == FILE_WAS_CREATED)
2741 && lp_nt_acl_support(SNUM(conn))) {
2742
2743 uint32_t sec_info_sent = ALL_SECURITY_INFORMATION;
2744 uint32_t saved_access_mask = fsp->access_mask;
2745
2746 if (sd->owner_sid == NULL) {
2747 sec_info_sent &= ~OWNER_SECURITY_INFORMATION;
2748 }
2749 if (sd->group_sid == NULL) {
2750 sec_info_sent &= ~GROUP_SECURITY_INFORMATION;
2751 }
2752 if (sd->sacl == NULL) {
2753 sec_info_sent &= ~SACL_SECURITY_INFORMATION;
2754 }
2755 if (sd->dacl == NULL) {
2756 sec_info_sent &= ~DACL_SECURITY_INFORMATION;
2757 }
2758
2759 fsp->access_mask = FILE_GENERIC_ALL;
2760
2761 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
2762
2763 fsp->access_mask = saved_access_mask;
2764
2765 if (!NT_STATUS_IS_OK(status)) {
2766 goto fail;
2767 }
2768 }
2769
2770 if ((ea_list != NULL) && (info == FILE_WAS_CREATED)) {
2771 status = set_ea(conn, fsp, fname, ea_list);
2772 if (!NT_STATUS_IS_OK(status)) {
2773 goto fail;
2774 }
2775 }
2776
2777 if (!fsp->is_directory && S_ISDIR(sbuf.st_mode)) {
2778 status = NT_STATUS_ACCESS_DENIED;
2779 goto fail;
2780 }
2781
2782 /* Save the requested allocation size. */
2783 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
2784 if (allocation_size
2785 && (allocation_size > sbuf.st_size)) {
2786 fsp->initial_allocation_size = smb_roundup(
2787 fsp->conn, allocation_size);
2788 if (fsp->is_directory) {
2789 /* Can't set allocation size on a directory. */
2790 status = NT_STATUS_ACCESS_DENIED;
2791 goto fail;
2792 }
2793 if (vfs_allocate_file_space(
2794 fsp, fsp->initial_allocation_size) == -1) {
2795 status = NT_STATUS_DISK_FULL;
2796 goto fail;
2797 }
2798 } else {
2799 fsp->initial_allocation_size = smb_roundup(
2800 fsp->conn, (SMB_BIG_UINT)sbuf.st_size);
2801 }
2802 }
2803
2804 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
2805
2806 /*
2807 * Set fsp->base_fsp late enough that we can't "goto fail" anymore. In
2808 * the fail: branch we call close_file(fsp, ERROR_CLOSE) which would
2809 * also close fsp->base_fsp which we have to also do explicitly in
2810 * this routine here, as not in all "goto fail:" we have the fsp set
2811 * up already to be initialized with the base_fsp.
2812 */
2813
2814 fsp->base_fsp = base_fsp;
2815
2816 *result = fsp;
2817 if (pinfo != NULL) {
2818 *pinfo = info;
2819 }
2820 if (psbuf != NULL) {
2821 if ((fsp->fh == NULL) || (fsp->fh->fd == -1)) {
2822 *psbuf = sbuf;
2823 }
2824 else {
2825 SMB_VFS_FSTAT(fsp, psbuf);
2826 }
2827 }
2828 return NT_STATUS_OK;
2829
2830 fail:
2831 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
2832
2833 if (fsp != NULL) {
2834 close_file(fsp, ERROR_CLOSE);
2835 fsp = NULL;
2836 }
2837 if (base_fsp != NULL) {
2838 close_file(base_fsp, ERROR_CLOSE);
2839 base_fsp = NULL;
2840 }
2841 return status;
2842 }
2843
2844 NTSTATUS create_file(connection_struct *conn,
2845 struct smb_request *req,
2846 uint16_t root_dir_fid,
2847 const char *fname,
2848 uint32_t access_mask,
2849 uint32_t share_access,
2850 uint32_t create_disposition,
2851 uint32_t create_options,
2852 uint32_t file_attributes,
2853 uint32_t oplock_request,
2854 SMB_BIG_UINT allocation_size,
2855 struct security_descriptor *sd,
2856 struct ea_list *ea_list,
2857
2858 files_struct **result,
2859 int *pinfo,
2860 SMB_STRUCT_STAT *psbuf)
2861 {
2862 struct case_semantics_state *case_state = NULL;
2863 SMB_STRUCT_STAT sbuf;
2864 int info = FILE_WAS_OPENED;
2865 files_struct *fsp = NULL;
2866 NTSTATUS status;
2867
2868 DEBUG(10,("create_file: access_mask = 0x%x "
2869 "file_attributes = 0x%x, share_access = 0x%x, "
2870 "create_disposition = 0x%x create_options = 0x%x "
2871 "oplock_request = 0x%x "
2872 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
2873 "fname = %s\n",
2874 (unsigned int)access_mask,
2875 (unsigned int)file_attributes,
2876 (unsigned int)share_access,
2877 (unsigned int)create_disposition,
2878 (unsigned int)create_options,
2879 (unsigned int)oplock_request,
2880 (unsigned int)root_dir_fid,
2881 ea_list, sd, fname));
2882
2883 /*
2884 * Get the file name.
2885 */
2886
2887 if (root_dir_fid != 0) {
2888 /*
2889 * This filename is relative to a directory fid.
2890 */
2891 char *parent_fname = NULL;
2892 files_struct *dir_fsp = file_fsp(root_dir_fid);
2893
2894 if (dir_fsp == NULL) {
2895 status = NT_STATUS_INVALID_HANDLE;
2896 goto fail;
2897 }
2898
2899 if (!dir_fsp->is_directory) {
2900
2901 /*
2902 * Check to see if this is a mac fork of some kind.
2903 */
2904
2905 if (is_ntfs_stream_name(fname)) {
2906 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
2907 goto fail;
2908 }
2909
2910 /*
2911 we need to handle the case when we get a
2912 relative open relative to a file and the
2913 pathname is blank - this is a reopen!
2914 (hint from demyn plantenberg)
2915 */
2916
2917 status = NT_STATUS_INVALID_HANDLE;
2918 goto fail;
2919 }
2920
2921 if (ISDOT(dir_fsp->fsp_name)) {
2922 /*
2923 * We're at the toplevel dir, the final file name
2924 * must not contain ./, as this is filtered out
2925 * normally by srvstr_get_path and unix_convert
2926 * explicitly rejects paths containing ./.
2927 */
2928 parent_fname = talloc_strdup(talloc_tos(), "");
2929 if (parent_fname == NULL) {
2930 status = NT_STATUS_NO_MEMORY;
2931 goto fail;
2932 }
2933 } else {
2934 size_t dir_name_len = strlen(dir_fsp->fsp_name);
2935
2936 /*
2937 * Copy in the base directory name.
2938 */
2939
2940 parent_fname = TALLOC_ARRAY(talloc_tos(), char,
2941 dir_name_len+2);
2942 if (parent_fname == NULL) {
2943 status = NT_STATUS_NO_MEMORY;
2944 goto fail;
2945 }
2946 memcpy(parent_fname, dir_fsp->fsp_name,
2947 dir_name_len+1);
2948
2949 /*
2950 * Ensure it ends in a '/'.
2951 * We used TALLOC_SIZE +2 to add space for the '/'.
2952 */
2953
2954 if(dir_name_len
2955 && (parent_fname[dir_name_len-1] != '\\')
2956 && (parent_fname[dir_name_len-1] != '/')) {
2957 parent_fname[dir_name_len] = '/';
2958 parent_fname[dir_name_len+1] = '\0';
2959 }
2960 }
2961
2962 fname = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
2963 fname);
2964 if (fname == NULL) {
2965 status = NT_STATUS_NO_MEMORY;
2966 goto fail;
2967 }
2968 }
2969
2970 /*
2971 * Check to see if this is a mac fork of some kind.
2972 */
2973
2974 if (is_ntfs_stream_name(fname)) {
2975 enum FAKE_FILE_TYPE fake_file_type;
2976
2977 fake_file_type = is_fake_file(fname);
2978
2979 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
2980
2981 /*
2982 * Here we go! support for changing the disk quotas
2983 * --metze
2984 *
2985 * We need to fake up to open this MAGIC QUOTA file
2986 * and return a valid FID.
2987 *
2988 * w2k close this file directly after openening xp
2989 * also tries a QUERY_FILE_INFO on the file and then
2990 * close it
2991 */
2992 status = open_fake_file(conn, req->vuid,
2993 fake_file_type, fname,
2994 access_mask, &fsp);
2995 if (!NT_STATUS_IS_OK(status)) {
2996 goto fail;
2997 }
2998
2999 ZERO_STRUCT(sbuf);
3000 goto done;
3001 }
3002 }
3003
3004 if ((req != NULL) && (req->flags2 & FLAGS2_DFS_PATHNAMES)) {
3005 char *resolved_fname;
3006
3007 status = resolve_dfspath(talloc_tos(), conn, true, fname,
3008 &resolved_fname);
3009
3010 if (!NT_STATUS_IS_OK(status)) {
3011 /*
3012 * For PATH_NOT_COVERED we had
3013 * reply_botherror(req, NT_STATUS_PATH_NOT_COVERED,
3014 * ERRSRV, ERRbadpath);
3015 * Need to fix in callers
3016 */
3017 goto fail;
3018 }
3019 fname = resolved_fname;
3020 }
3021
3022 /*
3023 * Check if POSIX semantics are wanted.
3024 */
3025
3026 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3027 case_state = set_posix_case_semantics(talloc_tos(), conn);
3028 file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
3029 }
3030
3031 {
3032 char *converted_fname;
3033
3034 SET_STAT_INVALID(sbuf);
3035
3036 status = unix_convert(talloc_tos(), conn, fname, False,
3037 &converted_fname, NULL, &sbuf);
3038 if (!NT_STATUS_IS_OK(status)) {
3039 goto fail;
3040 }
3041 fname = converted_fname;
3042 }
3043
3044 TALLOC_FREE(case_state);
3045
3046 /* All file access must go through check_name() */
3047
3048 status = check_name(conn, fname);
3049 if (!NT_STATUS_IS_OK(status)) {
3050 goto fail;
3051 }
3052
3053 status = create_file_unixpath(
3054 conn, req, fname, access_mask, share_access,
3055 create_disposition, create_options, file_attributes,
3056 oplock_request, allocation_size, sd, ea_list,
3057 &fsp, &info, &sbuf);
3058
3059 if (!NT_STATUS_IS_OK(status)) {
3060 goto fail;
3061 }
3062
3063 done:
3064 DEBUG(10, ("create_file: info=%d\n", info));
3065
3066 *result = fsp;
3067 if (pinfo != NULL) {
3068 *pinfo = info;
3069 }
3070 if (psbuf != NULL) {
3071 *psbuf = sbuf;
3072 }
3073 return NT_STATUS_OK;
3074
3075 fail:
3076 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3077
3078 if (fsp != NULL) {
3079 close_file(fsp, ERROR_CLOSE);
3080 fsp = NULL;
3081 }
3082 return status;
3083 }
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