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Remove smb_np_struct
[Samba/gebeck_regimport.git] / source3 / smbd / open.c
blob209ad4d587bd1ef333cc6ead4434c31f9aee5da8
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(struct smb_request *req,
894 connection_struct *conn,
895 const char *fname,
896 struct file_id id,
897 uint16 file_pid,
898 uint16 vuid,
899 uint32 access_mask,
900 uint32 share_access,
901 uint32 create_options)
902 {
903 files_struct *fsp;
904 files_struct *dup_fsp;
905
906 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
907 "file %s.\n", fname ));
908
909 for(fsp = file_find_di_first(id); fsp;
910 fsp = file_find_di_next(fsp)) {
911
912 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
913 "vuid = %u, file_pid = %u, private_options = 0x%x "
914 "access_mask = 0x%x\n", fsp->fsp_name,
915 fsp->fh->fd, (unsigned int)fsp->vuid,
916 (unsigned int)fsp->file_pid,
917 (unsigned int)fsp->fh->private_options,
918 (unsigned int)fsp->access_mask ));
919
920 if (fsp->fh->fd != -1 &&
921 fsp->vuid == vuid &&
922 fsp->file_pid == file_pid &&
923 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
924 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
925 (fsp->access_mask & FILE_WRITE_DATA) &&
926 strequal(fsp->fsp_name, fname)) {
927 DEBUG(10,("fcb_or_dos_open: file match\n"));
928 break;
929 }
930 }
931
932 if (!fsp) {
933 return NULL;
934 }
935
936 /* quite an insane set of semantics ... */
937 if (is_executable(fname) &&
938 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
939 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
940 return NULL;
941 }
942
943 /* We need to duplicate this fsp. */
944 if (!NT_STATUS_IS_OK(dup_file_fsp(req, fsp, access_mask, share_access,
945 create_options, &dup_fsp))) {
946 return NULL;
947 }
948
949 return dup_fsp;
950 }
951
952 /****************************************************************************
953 Open a file with a share mode - old openX method - map into NTCreate.
954 ****************************************************************************/
955
956 bool map_open_params_to_ntcreate(const char *fname, int deny_mode, int open_func,
957 uint32 *paccess_mask,
958 uint32 *pshare_mode,
959 uint32 *pcreate_disposition,
960 uint32 *pcreate_options)
961 {
962 uint32 access_mask;
963 uint32 share_mode;
964 uint32 create_disposition;
965 uint32 create_options = 0;
966
967 DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
968 "open_func = 0x%x\n",
969 fname, (unsigned int)deny_mode, (unsigned int)open_func ));
970
971 /* Create the NT compatible access_mask. */
972 switch (GET_OPENX_MODE(deny_mode)) {
973 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
974 case DOS_OPEN_RDONLY:
975 access_mask = FILE_GENERIC_READ;
976 break;
977 case DOS_OPEN_WRONLY:
978 access_mask = FILE_GENERIC_WRITE;
979 break;
980 case DOS_OPEN_RDWR:
981 case DOS_OPEN_FCB:
982 access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
983 break;
984 default:
985 DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
986 (unsigned int)GET_OPENX_MODE(deny_mode)));
987 return False;
988 }
989
990 /* Create the NT compatible create_disposition. */
991 switch (open_func) {
992 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
993 create_disposition = FILE_CREATE;
994 break;
995
996 case OPENX_FILE_EXISTS_OPEN:
997 create_disposition = FILE_OPEN;
998 break;
999
1000 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
1001 create_disposition = FILE_OPEN_IF;
1002 break;
1003
1004 case OPENX_FILE_EXISTS_TRUNCATE:
1005 create_disposition = FILE_OVERWRITE;
1006 break;
1007
1008 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
1009 create_disposition = FILE_OVERWRITE_IF;
1010 break;
1011
1012 default:
1013 /* From samba4 - to be confirmed. */
1014 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
1015 create_disposition = FILE_CREATE;
1016 break;
1017 }
1018 DEBUG(10,("map_open_params_to_ntcreate: bad "
1019 "open_func 0x%x\n", (unsigned int)open_func));
1020 return False;
1021 }
1022
1023 /* Create the NT compatible share modes. */
1024 switch (GET_DENY_MODE(deny_mode)) {
1025 case DENY_ALL:
1026 share_mode = FILE_SHARE_NONE;
1027 break;
1028
1029 case DENY_WRITE:
1030 share_mode = FILE_SHARE_READ;
1031 break;
1032
1033 case DENY_READ:
1034 share_mode = FILE_SHARE_WRITE;
1035 break;
1036
1037 case DENY_NONE:
1038 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1039 break;
1040
1041 case DENY_DOS:
1042 create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1043 if (is_executable(fname)) {
1044 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1045 } else {
1046 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1047 share_mode = FILE_SHARE_READ;
1048 } else {
1049 share_mode = FILE_SHARE_NONE;
1050 }
1051 }
1052 break;
1053
1054 case DENY_FCB:
1055 create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1056 share_mode = FILE_SHARE_NONE;
1057 break;
1058
1059 default:
1060 DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1061 (unsigned int)GET_DENY_MODE(deny_mode) ));
1062 return False;
1063 }
1064
1065 DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1066 "share_mode = 0x%x, create_disposition = 0x%x, "
1067 "create_options = 0x%x\n",
1068 fname,
1069 (unsigned int)access_mask,
1070 (unsigned int)share_mode,
1071 (unsigned int)create_disposition,
1072 (unsigned int)create_options ));
1073
1074 if (paccess_mask) {
1075 *paccess_mask = access_mask;
1076 }
1077 if (pshare_mode) {
1078 *pshare_mode = share_mode;
1079 }
1080 if (pcreate_disposition) {
1081 *pcreate_disposition = create_disposition;
1082 }
1083 if (pcreate_options) {
1084 *pcreate_options = create_options;
1085 }
1086
1087 return True;
1088
1089 }
1090
1091 static void schedule_defer_open(struct share_mode_lock *lck,
1092 struct timeval request_time,
1093 struct smb_request *req)
1094 {
1095 struct deferred_open_record state;
1096
1097 /* This is a relative time, added to the absolute
1098 request_time value to get the absolute timeout time.
1099 Note that if this is the second or greater time we enter
1100 this codepath for this particular request mid then
1101 request_time is left as the absolute time of the *first*
1102 time this request mid was processed. This is what allows
1103 the request to eventually time out. */
1104
1105 struct timeval timeout;
1106
1107 /* Normally the smbd we asked should respond within
1108 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1109 * the client did, give twice the timeout as a safety
1110 * measure here in case the other smbd is stuck
1111 * somewhere else. */
1112
1113 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1114
1115 /* Nothing actually uses state.delayed_for_oplocks
1116 but it's handy to differentiate in debug messages
1117 between a 30 second delay due to oplock break, and
1118 a 1 second delay for share mode conflicts. */
1119
1120 state.delayed_for_oplocks = True;
1121 state.id = lck->id;
1122
1123 if (!request_timed_out(request_time, timeout)) {
1124 defer_open(lck, request_time, timeout, req, &state);
1125 }
1126 }
1127
1128 /****************************************************************************
1129 Open a file with a share mode.
1130 ****************************************************************************/
1131
1132 NTSTATUS open_file_ntcreate(connection_struct *conn,
1133 struct smb_request *req,
1134 const char *fname,
1135 SMB_STRUCT_STAT *psbuf,
1136 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1137 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1138 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1139 uint32 create_options, /* options such as delete on close. */
1140 uint32 new_dos_attributes, /* attributes used for new file. */
1141 int oplock_request, /* internal Samba oplock codes. */
1142 /* Information (FILE_EXISTS etc.) */
1143 int *pinfo,
1144 files_struct **result)
1145 {
1146 int flags=0;
1147 int flags2=0;
1148 bool file_existed = VALID_STAT(*psbuf);
1149 bool def_acl = False;
1150 bool posix_open = False;
1151 bool new_file_created = False;
1152 struct file_id id;
1153 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1154 files_struct *fsp = NULL;
1155 mode_t new_unx_mode = (mode_t)0;
1156 mode_t unx_mode = (mode_t)0;
1157 int info;
1158 uint32 existing_dos_attributes = 0;
1159 struct pending_message_list *pml = NULL;
1160 struct timeval request_time = timeval_zero();
1161 struct share_mode_lock *lck = NULL;
1162 uint32 open_access_mask = access_mask;
1163 NTSTATUS status;
1164 int ret_flock;
1165 char *parent_dir;
1166 const char *newname;
1167
1168 ZERO_STRUCT(id);
1169
1170 if (conn->printer) {
1171 /*
1172 * Printers are handled completely differently.
1173 * Most of the passed parameters are ignored.
1174 */
1175
1176 if (pinfo) {
1177 *pinfo = FILE_WAS_CREATED;
1178 }
1179
1180 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n", fname));
1181
1182 return print_fsp_open(req, conn, fname, req->vuid, result);
1183 }
1184
1185 if (!parent_dirname_talloc(talloc_tos(), fname, &parent_dir,
1186 &newname)) {
1187 return NT_STATUS_NO_MEMORY;
1188 }
1189
1190 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1191 posix_open = True;
1192 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1193 new_dos_attributes = 0;
1194 } else {
1195 /* We add aARCH to this as this mode is only used if the file is
1196 * created new. */
1197 unx_mode = unix_mode(conn, new_dos_attributes | aARCH, fname,
1198 parent_dir);
1199 }
1200
1201 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1202 "access_mask=0x%x share_access=0x%x "
1203 "create_disposition = 0x%x create_options=0x%x "
1204 "unix mode=0%o oplock_request=%d\n",
1205 fname, new_dos_attributes, access_mask, share_access,
1206 create_disposition, create_options, unx_mode,
1207 oplock_request));
1208
1209 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1210 DEBUG(0, ("No smb request but not an internal only open!\n"));
1211 return NT_STATUS_INTERNAL_ERROR;
1212 }
1213
1214 /*
1215 * Only non-internal opens can be deferred at all
1216 */
1217
1218 if ((req != NULL)
1219 && ((pml = get_open_deferred_message(req->mid)) != NULL)) {
1220 struct deferred_open_record *state =
1221 (struct deferred_open_record *)pml->private_data.data;
1222
1223 /* Remember the absolute time of the original
1224 request with this mid. We'll use it later to
1225 see if this has timed out. */
1226
1227 request_time = pml->request_time;
1228
1229 /* Remove the deferred open entry under lock. */
1230 lck = get_share_mode_lock(talloc_tos(), state->id, NULL, NULL,
1231 NULL);
1232 if (lck == NULL) {
1233 DEBUG(0, ("could not get share mode lock\n"));
1234 } else {
1235 del_deferred_open_entry(lck, req->mid);
1236 TALLOC_FREE(lck);
1237 }
1238
1239 /* Ensure we don't reprocess this message. */
1240 remove_deferred_open_smb_message(req->mid);
1241 }
1242
1243 status = check_name(conn, fname);
1244 if (!NT_STATUS_IS_OK(status)) {
1245 return status;
1246 }
1247
1248 if (!posix_open) {
1249 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1250 if (file_existed) {
1251 existing_dos_attributes = dos_mode(conn, fname, psbuf);
1252 }
1253 }
1254
1255 /* ignore any oplock requests if oplocks are disabled */
1256 if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break ||
1257 IS_VETO_OPLOCK_PATH(conn, fname)) {
1258 /* Mask off everything except the private Samba bits. */
1259 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1260 }
1261
1262 /* this is for OS/2 long file names - say we don't support them */
1263 if (!lp_posix_pathnames() && strstr(fname,".+,;=[].")) {
1264 /* OS/2 Workplace shell fix may be main code stream in a later
1265 * release. */
1266 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1267 "supported.\n"));
1268 if (use_nt_status()) {
1269 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1270 }
1271 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1272 }
1273
1274 switch( create_disposition ) {
1275 /*
1276 * Currently we're using FILE_SUPERSEDE as the same as
1277 * FILE_OVERWRITE_IF but they really are
1278 * different. FILE_SUPERSEDE deletes an existing file
1279 * (requiring delete access) then recreates it.
1280 */
1281 case FILE_SUPERSEDE:
1282 /* If file exists replace/overwrite. If file doesn't
1283 * exist create. */
1284 flags2 |= (O_CREAT | O_TRUNC);
1285 break;
1286
1287 case FILE_OVERWRITE_IF:
1288 /* If file exists replace/overwrite. If file doesn't
1289 * exist create. */
1290 flags2 |= (O_CREAT | O_TRUNC);
1291 break;
1292
1293 case FILE_OPEN:
1294 /* If file exists open. If file doesn't exist error. */
1295 if (!file_existed) {
1296 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1297 "requested for file %s and file "
1298 "doesn't exist.\n", fname ));
1299 errno = ENOENT;
1300 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1301 }
1302 break;
1303
1304 case FILE_OVERWRITE:
1305 /* If file exists overwrite. If file doesn't exist
1306 * error. */
1307 if (!file_existed) {
1308 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1309 "requested for file %s and file "
1310 "doesn't exist.\n", fname ));
1311 errno = ENOENT;
1312 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1313 }
1314 flags2 |= O_TRUNC;
1315 break;
1316
1317 case FILE_CREATE:
1318 /* If file exists error. If file doesn't exist
1319 * create. */
1320 if (file_existed) {
1321 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1322 "requested for file %s and file "
1323 "already exists.\n", fname ));
1324 if (S_ISDIR(psbuf->st_mode)) {
1325 errno = EISDIR;
1326 } else {
1327 errno = EEXIST;
1328 }
1329 return map_nt_error_from_unix(errno);
1330 }
1331 flags2 |= (O_CREAT|O_EXCL);
1332 break;
1333
1334 case FILE_OPEN_IF:
1335 /* If file exists open. If file doesn't exist
1336 * create. */
1337 flags2 |= O_CREAT;
1338 break;
1339
1340 default:
1341 return NT_STATUS_INVALID_PARAMETER;
1342 }
1343
1344 /* We only care about matching attributes on file exists and
1345 * overwrite. */
1346
1347 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1348 (create_disposition == FILE_OVERWRITE_IF))) {
1349 if (!open_match_attributes(conn, fname,
1350 existing_dos_attributes,
1351 new_dos_attributes, psbuf->st_mode,
1352 unx_mode, &new_unx_mode)) {
1353 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1354 "for file %s (%x %x) (0%o, 0%o)\n",
1355 fname, existing_dos_attributes,
1356 new_dos_attributes,
1357 (unsigned int)psbuf->st_mode,
1358 (unsigned int)unx_mode ));
1359 errno = EACCES;
1360 return NT_STATUS_ACCESS_DENIED;
1361 }
1362 }
1363
1364 /* This is a nasty hack - must fix... JRA. */
1365 if (access_mask == MAXIMUM_ALLOWED_ACCESS) {
1366 open_access_mask = access_mask = FILE_GENERIC_ALL;
1367 }
1368
1369 /*
1370 * Convert GENERIC bits to specific bits.
1371 */
1372
1373 se_map_generic(&access_mask, &file_generic_mapping);
1374 open_access_mask = access_mask;
1375
1376 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1377 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1378 }
1379
1380 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1381 "access_mask=0x%x\n", fname, access_mask ));
1382
1383 /*
1384 * Note that we ignore the append flag as append does not
1385 * mean the same thing under DOS and Unix.
1386 */
1387
1388 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1389 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1390 /* DENY_DOS opens are always underlying read-write on the
1391 file handle, no matter what the requested access mask
1392 says. */
1393 if ((create_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1394 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1395 flags = O_RDWR;
1396 } else {
1397 flags = O_WRONLY;
1398 }
1399 } else {
1400 flags = O_RDONLY;
1401 }
1402
1403 /*
1404 * Currently we only look at FILE_WRITE_THROUGH for create options.
1405 */
1406
1407 #if defined(O_SYNC)
1408 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1409 flags2 |= O_SYNC;
1410 }
1411 #endif /* O_SYNC */
1412
1413 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1414 flags2 |= O_APPEND;
1415 }
1416
1417 if (!posix_open && !CAN_WRITE(conn)) {
1418 /*
1419 * We should really return a permission denied error if either
1420 * O_CREAT or O_TRUNC are set, but for compatibility with
1421 * older versions of Samba we just AND them out.
1422 */
1423 flags2 &= ~(O_CREAT|O_TRUNC);
1424 }
1425
1426 /*
1427 * Ensure we can't write on a read-only share or file.
1428 */
1429
1430 if (flags != O_RDONLY && file_existed &&
1431 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1432 DEBUG(5,("open_file_ntcreate: write access requested for "
1433 "file %s on read only %s\n",
1434 fname, !CAN_WRITE(conn) ? "share" : "file" ));
1435 errno = EACCES;
1436 return NT_STATUS_ACCESS_DENIED;
1437 }
1438
1439 status = file_new(req, conn, &fsp);
1440 if(!NT_STATUS_IS_OK(status)) {
1441 return status;
1442 }
1443
1444 fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
1445 fsp->share_access = share_access;
1446 fsp->fh->private_options = create_options;
1447 fsp->access_mask = open_access_mask; /* We change this to the
1448 * requested access_mask after
1449 * the open is done. */
1450 fsp->posix_open = posix_open;
1451
1452 /* Ensure no SAMBA_PRIVATE bits can be set. */
1453 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1454
1455 if (timeval_is_zero(&request_time)) {
1456 request_time = fsp->open_time;
1457 }
1458
1459 if (file_existed) {
1460 struct timespec old_write_time = get_mtimespec(psbuf);
1461 id = vfs_file_id_from_sbuf(conn, psbuf);
1462
1463 lck = get_share_mode_lock(talloc_tos(), id,
1464 conn->connectpath,
1465 fname, &old_write_time);
1466
1467 if (lck == NULL) {
1468 file_free(req, fsp);
1469 DEBUG(0, ("Could not get share mode lock\n"));
1470 return NT_STATUS_SHARING_VIOLATION;
1471 }
1472
1473 /* First pass - send break only on batch oplocks. */
1474 if ((req != NULL)
1475 && delay_for_oplocks(lck, fsp, req->mid, 1,
1476 oplock_request)) {
1477 schedule_defer_open(lck, request_time, req);
1478 TALLOC_FREE(lck);
1479 file_free(req, fsp);
1480 return NT_STATUS_SHARING_VIOLATION;
1481 }
1482
1483 /* Use the client requested access mask here, not the one we
1484 * open with. */
1485 status = open_mode_check(conn, fname, lck,
1486 access_mask, share_access,
1487 create_options, &file_existed);
1488
1489 if (NT_STATUS_IS_OK(status)) {
1490 /* We might be going to allow this open. Check oplock
1491 * status again. */
1492 /* Second pass - send break for both batch or
1493 * exclusive oplocks. */
1494 if ((req != NULL)
1495 && delay_for_oplocks(lck, fsp, req->mid, 2,
1496 oplock_request)) {
1497 schedule_defer_open(lck, request_time, req);
1498 TALLOC_FREE(lck);
1499 file_free(req, fsp);
1500 return NT_STATUS_SHARING_VIOLATION;
1501 }
1502 }
1503
1504 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1505 /* DELETE_PENDING is not deferred for a second */
1506 TALLOC_FREE(lck);
1507 file_free(req, fsp);
1508 return status;
1509 }
1510
1511 if (!NT_STATUS_IS_OK(status)) {
1512 uint32 can_access_mask;
1513 bool can_access = True;
1514
1515 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1516
1517 /* Check if this can be done with the deny_dos and fcb
1518 * calls. */
1519 if (create_options &
1520 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1521 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1522 files_struct *fsp_dup;
1523
1524 if (req == NULL) {
1525 DEBUG(0, ("DOS open without an SMB "
1526 "request!\n"));
1527 TALLOC_FREE(lck);
1528 file_free(req, fsp);
1529 return NT_STATUS_INTERNAL_ERROR;
1530 }
1531
1532 /* Use the client requested access mask here,
1533 * not the one we open with. */
1534 fsp_dup = fcb_or_dos_open(req, conn, fname, id,
1535 req->smbpid,
1536 req->vuid,
1537 access_mask,
1538 share_access,
1539 create_options);
1540
1541 if (fsp_dup) {
1542 TALLOC_FREE(lck);
1543 file_free(req, fsp);
1544 if (pinfo) {
1545 *pinfo = FILE_WAS_OPENED;
1546 }
1547 conn->num_files_open++;
1548 *result = fsp_dup;
1549 return NT_STATUS_OK;
1550 }
1551 }
1552
1553 /*
1554 * This next line is a subtlety we need for
1555 * MS-Access. If a file open will fail due to share
1556 * permissions and also for security (access) reasons,
1557 * we need to return the access failed error, not the
1558 * share error. We can't open the file due to kernel
1559 * oplock deadlock (it's possible we failed above on
1560 * the open_mode_check()) so use a userspace check.
1561 */
1562
1563 if (flags & O_RDWR) {
1564 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1565 } else if (flags & O_WRONLY) {
1566 can_access_mask = FILE_WRITE_DATA;
1567 } else {
1568 can_access_mask = FILE_READ_DATA;
1569 }
1570
1571 if (((can_access_mask & FILE_WRITE_DATA) && !CAN_WRITE(conn)) ||
1572 !can_access_file_data(conn,fname,psbuf,can_access_mask)) {
1573 can_access = False;
1574 }
1575
1576 /*
1577 * If we're returning a share violation, ensure we
1578 * cope with the braindead 1 second delay.
1579 */
1580
1581 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1582 lp_defer_sharing_violations()) {
1583 struct timeval timeout;
1584 struct deferred_open_record state;
1585 int timeout_usecs;
1586
1587 /* this is a hack to speed up torture tests
1588 in 'make test' */
1589 timeout_usecs = lp_parm_int(SNUM(conn),
1590 "smbd","sharedelay",
1591 SHARING_VIOLATION_USEC_WAIT);
1592
1593 /* This is a relative time, added to the absolute
1594 request_time value to get the absolute timeout time.
1595 Note that if this is the second or greater time we enter
1596 this codepath for this particular request mid then
1597 request_time is left as the absolute time of the *first*
1598 time this request mid was processed. This is what allows
1599 the request to eventually time out. */
1600
1601 timeout = timeval_set(0, timeout_usecs);
1602
1603 /* Nothing actually uses state.delayed_for_oplocks
1604 but it's handy to differentiate in debug messages
1605 between a 30 second delay due to oplock break, and
1606 a 1 second delay for share mode conflicts. */
1607
1608 state.delayed_for_oplocks = False;
1609 state.id = id;
1610
1611 if ((req != NULL)
1612 && !request_timed_out(request_time,
1613 timeout)) {
1614 defer_open(lck, request_time, timeout,
1615 req, &state);
1616 }
1617 }
1618
1619 TALLOC_FREE(lck);
1620 if (can_access) {
1621 /*
1622 * We have detected a sharing violation here
1623 * so return the correct error code
1624 */
1625 status = NT_STATUS_SHARING_VIOLATION;
1626 } else {
1627 status = NT_STATUS_ACCESS_DENIED;
1628 }
1629 file_free(req, fsp);
1630 return status;
1631 }
1632
1633 /*
1634 * We exit this block with the share entry *locked*.....
1635 */
1636 }
1637
1638 SMB_ASSERT(!file_existed || (lck != NULL));
1639
1640 /*
1641 * Ensure we pay attention to default ACLs on directories if required.
1642 */
1643
1644 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1645 (def_acl = directory_has_default_acl(conn, parent_dir))) {
1646 unx_mode = 0777;
1647 }
1648
1649 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1650 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1651 (unsigned int)flags, (unsigned int)flags2,
1652 (unsigned int)unx_mode, (unsigned int)access_mask,
1653 (unsigned int)open_access_mask));
1654
1655 /*
1656 * open_file strips any O_TRUNC flags itself.
1657 */
1658
1659 fsp_open = open_file(fsp, conn, req, parent_dir, newname, fname, psbuf,
1660 flags|flags2, unx_mode, access_mask,
1661 open_access_mask);
1662
1663 if (!NT_STATUS_IS_OK(fsp_open)) {
1664 if (lck != NULL) {
1665 TALLOC_FREE(lck);
1666 }
1667 file_free(req, fsp);
1668 return fsp_open;
1669 }
1670
1671 if (!file_existed) {
1672 struct timespec old_write_time = get_mtimespec(psbuf);
1673 /*
1674 * Deal with the race condition where two smbd's detect the
1675 * file doesn't exist and do the create at the same time. One
1676 * of them will win and set a share mode, the other (ie. this
1677 * one) should check if the requested share mode for this
1678 * create is allowed.
1679 */
1680
1681 /*
1682 * Now the file exists and fsp is successfully opened,
1683 * fsp->dev and fsp->inode are valid and should replace the
1684 * dev=0,inode=0 from a non existent file. Spotted by
1685 * Nadav Danieli <nadavd@exanet.com>. JRA.
1686 */
1687
1688 id = fsp->file_id;
1689
1690 lck = get_share_mode_lock(talloc_tos(), id,
1691 conn->connectpath,
1692 fname, &old_write_time);
1693
1694 if (lck == NULL) {
1695 DEBUG(0, ("open_file_ntcreate: Could not get share "
1696 "mode lock for %s\n", fname));
1697 fd_close(fsp);
1698 file_free(req, fsp);
1699 return NT_STATUS_SHARING_VIOLATION;
1700 }
1701
1702 /* First pass - send break only on batch oplocks. */
1703 if ((req != NULL)
1704 && delay_for_oplocks(lck, fsp, req->mid, 1,
1705 oplock_request)) {
1706 schedule_defer_open(lck, request_time, req);
1707 TALLOC_FREE(lck);
1708 fd_close(fsp);
1709 file_free(req, fsp);
1710 return NT_STATUS_SHARING_VIOLATION;
1711 }
1712
1713 status = open_mode_check(conn, fname, lck,
1714 access_mask, share_access,
1715 create_options, &file_existed);
1716
1717 if (NT_STATUS_IS_OK(status)) {
1718 /* We might be going to allow this open. Check oplock
1719 * status again. */
1720 /* Second pass - send break for both batch or
1721 * exclusive oplocks. */
1722 if ((req != NULL)
1723 && delay_for_oplocks(lck, fsp, req->mid, 2,
1724 oplock_request)) {
1725 schedule_defer_open(lck, request_time, req);
1726 TALLOC_FREE(lck);
1727 fd_close(fsp);
1728 file_free(req, fsp);
1729 return NT_STATUS_SHARING_VIOLATION;
1730 }
1731 }
1732
1733 if (!NT_STATUS_IS_OK(status)) {
1734 struct deferred_open_record state;
1735
1736 fd_close(fsp);
1737 file_free(req, fsp);
1738
1739 state.delayed_for_oplocks = False;
1740 state.id = id;
1741
1742 /* Do it all over again immediately. In the second
1743 * round we will find that the file existed and handle
1744 * the DELETE_PENDING and FCB cases correctly. No need
1745 * to duplicate the code here. Essentially this is a
1746 * "goto top of this function", but don't tell
1747 * anybody... */
1748
1749 if (req != NULL) {
1750 defer_open(lck, request_time, timeval_zero(),
1751 req, &state);
1752 }
1753 TALLOC_FREE(lck);
1754 return status;
1755 }
1756
1757 /*
1758 * We exit this block with the share entry *locked*.....
1759 */
1760
1761 }
1762
1763 SMB_ASSERT(lck != NULL);
1764
1765 /* note that we ignore failure for the following. It is
1766 basically a hack for NFS, and NFS will never set one of
1767 these only read them. Nobody but Samba can ever set a deny
1768 mode and we have already checked our more authoritative
1769 locking database for permission to set this deny mode. If
1770 the kernel refuses the operations then the kernel is wrong.
1771 note that GPFS supports it as well - jmcd */
1772
1773 if (fsp->fh->fd != -1) {
1774 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access);
1775 if(ret_flock == -1 ){
1776
1777 TALLOC_FREE(lck);
1778 fd_close(fsp);
1779 file_free(req, fsp);
1780
1781 return NT_STATUS_SHARING_VIOLATION;
1782 }
1783 }
1784
1785 /*
1786 * At this point onwards, we can guarentee that the share entry
1787 * is locked, whether we created the file or not, and that the
1788 * deny mode is compatible with all current opens.
1789 */
1790
1791 /*
1792 * If requested, truncate the file.
1793 */
1794
1795 if (flags2&O_TRUNC) {
1796 /*
1797 * We are modifing the file after open - update the stat
1798 * struct..
1799 */
1800 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
1801 (SMB_VFS_FSTAT(fsp, psbuf)==-1)) {
1802 status = map_nt_error_from_unix(errno);
1803 TALLOC_FREE(lck);
1804 fd_close(fsp);
1805 file_free(req, fsp);
1806 return status;
1807 }
1808 }
1809
1810 /* Record the options we were opened with. */
1811 fsp->share_access = share_access;
1812 fsp->fh->private_options = create_options;
1813 fsp->access_mask = access_mask;
1814
1815 if (file_existed) {
1816 /* stat opens on existing files don't get oplocks. */
1817 if (is_stat_open(open_access_mask)) {
1818 fsp->oplock_type = NO_OPLOCK;
1819 }
1820
1821 if (!(flags2 & O_TRUNC)) {
1822 info = FILE_WAS_OPENED;
1823 } else {
1824 info = FILE_WAS_OVERWRITTEN;
1825 }
1826 } else {
1827 info = FILE_WAS_CREATED;
1828 }
1829
1830 if (pinfo) {
1831 *pinfo = info;
1832 }
1833
1834 /*
1835 * Setup the oplock info in both the shared memory and
1836 * file structs.
1837 */
1838
1839 if ((fsp->oplock_type != NO_OPLOCK) &&
1840 (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK)) {
1841 if (!set_file_oplock(fsp, fsp->oplock_type)) {
1842 /* Could not get the kernel oplock */
1843 fsp->oplock_type = NO_OPLOCK;
1844 }
1845 }
1846
1847 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
1848 new_file_created = True;
1849 }
1850
1851 set_share_mode(lck, fsp, conn->server_info->utok.uid, 0,
1852 fsp->oplock_type, new_file_created);
1853
1854 /* Handle strange delete on close create semantics. */
1855 if ((create_options & FILE_DELETE_ON_CLOSE)
1856 && (((conn->fs_capabilities & FILE_NAMED_STREAMS)
1857 && is_ntfs_stream_name(fname))
1858 || can_set_initial_delete_on_close(lck))) {
1859 status = can_set_delete_on_close(fsp, True, new_dos_attributes);
1860
1861 if (!NT_STATUS_IS_OK(status)) {
1862 /* Remember to delete the mode we just added. */
1863 del_share_mode(lck, fsp);
1864 TALLOC_FREE(lck);
1865 fd_close(fsp);
1866 file_free(req, fsp);
1867 return status;
1868 }
1869 /* Note that here we set the *inital* delete on close flag,
1870 not the regular one. The magic gets handled in close. */
1871 fsp->initial_delete_on_close = True;
1872 }
1873
1874 if (new_file_created) {
1875 /* Files should be initially set as archive */
1876 if (lp_map_archive(SNUM(conn)) ||
1877 lp_store_dos_attributes(SNUM(conn))) {
1878 if (!posix_open) {
1879 SMB_STRUCT_STAT tmp_sbuf;
1880 SET_STAT_INVALID(tmp_sbuf);
1881 if (file_set_dosmode(
1882 conn, fname,
1883 new_dos_attributes | aARCH,
1884 &tmp_sbuf, parent_dir,
1885 true) == 0) {
1886 unx_mode = tmp_sbuf.st_mode;
1887 }
1888 }
1889 }
1890 }
1891
1892 /*
1893 * Take care of inherited ACLs on created files - if default ACL not
1894 * selected.
1895 */
1896
1897 if (!posix_open && !file_existed && !def_acl) {
1898
1899 int saved_errno = errno; /* We might get ENOSYS in the next
1900 * call.. */
1901
1902 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
1903 errno == ENOSYS) {
1904 errno = saved_errno; /* Ignore ENOSYS */
1905 }
1906
1907 } else if (new_unx_mode) {
1908
1909 int ret = -1;
1910
1911 /* Attributes need changing. File already existed. */
1912
1913 {
1914 int saved_errno = errno; /* We might get ENOSYS in the
1915 * next call.. */
1916 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
1917
1918 if (ret == -1 && errno == ENOSYS) {
1919 errno = saved_errno; /* Ignore ENOSYS */
1920 } else {
1921 DEBUG(5, ("open_file_ntcreate: reset "
1922 "attributes of file %s to 0%o\n",
1923 fname, (unsigned int)new_unx_mode));
1924 ret = 0; /* Don't do the fchmod below. */
1925 }
1926 }
1927
1928 if ((ret == -1) &&
1929 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
1930 DEBUG(5, ("open_file_ntcreate: failed to reset "
1931 "attributes of file %s to 0%o\n",
1932 fname, (unsigned int)new_unx_mode));
1933 }
1934
1935 /* If this is a successful open, we must remove any deferred open
1936 * records. */
1937 if (req != NULL) {
1938 del_deferred_open_entry(lck, req->mid);
1939 }
1940 TALLOC_FREE(lck);
1941
1942 conn->num_files_open++;
1943
1944 *result = fsp;
1945 return NT_STATUS_OK;
1946 }
1947
1948 /****************************************************************************
1949 Open a file for for write to ensure that we can fchmod it.
1950 ****************************************************************************/
1951
1952 NTSTATUS open_file_fchmod(struct smb_request *req, connection_struct *conn,
1953 const char *fname,
1954 SMB_STRUCT_STAT *psbuf, files_struct **result)
1955 {
1956 files_struct *fsp = NULL;
1957 NTSTATUS status;
1958
1959 if (!VALID_STAT(*psbuf)) {
1960 return NT_STATUS_INVALID_PARAMETER;
1961 }
1962
1963 status = file_new(req, conn, &fsp);
1964 if(!NT_STATUS_IS_OK(status)) {
1965 return status;
1966 }
1967
1968 /* note! we must use a non-zero desired access or we don't get
1969 a real file descriptor. Oh what a twisted web we weave. */
1970 status = open_file(fsp, conn, NULL, NULL, NULL, fname, psbuf, O_WRONLY,
1971 0, FILE_WRITE_DATA, FILE_WRITE_DATA);
1972
1973 /*
1974 * This is not a user visible file open.
1975 * Don't set a share mode and don't increment
1976 * the conn->num_files_open.
1977 */
1978
1979 if (!NT_STATUS_IS_OK(status)) {
1980 file_free(req, fsp);
1981 return status;
1982 }
1983
1984 *result = fsp;
1985 return NT_STATUS_OK;
1986 }
1987
1988 /****************************************************************************
1989 Close the fchmod file fd - ensure no locks are lost.
1990 ****************************************************************************/
1991
1992 NTSTATUS close_file_fchmod(struct smb_request *req, files_struct *fsp)
1993 {
1994 NTSTATUS status = fd_close(fsp);
1995 file_free(req, fsp);
1996 return status;
1997 }
1998
1999 static NTSTATUS mkdir_internal(connection_struct *conn,
2000 const char *name,
2001 uint32 file_attributes,
2002 SMB_STRUCT_STAT *psbuf)
2003 {
2004 mode_t mode;
2005 char *parent_dir;
2006 const char *dirname;
2007 NTSTATUS status;
2008 bool posix_open = false;
2009
2010 if(!CAN_WRITE(conn)) {
2011 DEBUG(5,("mkdir_internal: failing create on read-only share "
2012 "%s\n", lp_servicename(SNUM(conn))));
2013 return NT_STATUS_ACCESS_DENIED;
2014 }
2015
2016 status = check_name(conn, name);
2017 if (!NT_STATUS_IS_OK(status)) {
2018 return status;
2019 }
2020
2021 if (!parent_dirname_talloc(talloc_tos(), name, &parent_dir,
2022 &dirname)) {
2023 return NT_STATUS_NO_MEMORY;
2024 }
2025
2026 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2027 posix_open = true;
2028 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2029 } else {
2030 mode = unix_mode(conn, aDIR, name, parent_dir);
2031 }
2032
2033 if (SMB_VFS_MKDIR(conn, name, mode) != 0) {
2034 return map_nt_error_from_unix(errno);
2035 }
2036
2037 /* Ensure we're checking for a symlink here.... */
2038 /* We don't want to get caught by a symlink racer. */
2039
2040 if (SMB_VFS_LSTAT(conn, name, psbuf) == -1) {
2041 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2042 name, strerror(errno)));
2043 return map_nt_error_from_unix(errno);
2044 }
2045
2046 if (!S_ISDIR(psbuf->st_mode)) {
2047 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2048 name));
2049 return NT_STATUS_ACCESS_DENIED;
2050 }
2051
2052 if (lp_store_dos_attributes(SNUM(conn))) {
2053 if (!posix_open) {
2054 file_set_dosmode(conn, name,
2055 file_attributes | aDIR, NULL,
2056 parent_dir,
2057 true);
2058 }
2059 }
2060
2061 if (lp_inherit_perms(SNUM(conn))) {
2062 inherit_access_posix_acl(conn, parent_dir, name, mode);
2063 }
2064
2065 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2066 /*
2067 * Check if high bits should have been set,
2068 * then (if bits are missing): add them.
2069 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2070 * dir.
2071 */
2072 if (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO) && (mode & ~psbuf->st_mode)) {
2073 SMB_VFS_CHMOD(conn, name,
2074 psbuf->st_mode | (mode & ~psbuf->st_mode));
2075 }
2076 }
2077
2078 /* Change the owner if required. */
2079 if (lp_inherit_owner(SNUM(conn))) {
2080 change_dir_owner_to_parent(conn, parent_dir, name, psbuf);
2081 }
2082
2083 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2084 name);
2085
2086 return NT_STATUS_OK;
2087 }
2088
2089 /****************************************************************************
2090 Open a directory from an NT SMB call.
2091 ****************************************************************************/
2092
2093 NTSTATUS open_directory(connection_struct *conn,
2094 struct smb_request *req,
2095 const char *fname,
2096 SMB_STRUCT_STAT *psbuf,
2097 uint32 access_mask,
2098 uint32 share_access,
2099 uint32 create_disposition,
2100 uint32 create_options,
2101 uint32 file_attributes,
2102 int *pinfo,
2103 files_struct **result)
2104 {
2105 files_struct *fsp = NULL;
2106 bool dir_existed = VALID_STAT(*psbuf) ? True : False;
2107 struct share_mode_lock *lck = NULL;
2108 NTSTATUS status;
2109 struct timespec mtimespec;
2110 int info = 0;
2111
2112 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2113 "share_access = 0x%x create_options = 0x%x, "
2114 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2115 fname,
2116 (unsigned int)access_mask,
2117 (unsigned int)share_access,
2118 (unsigned int)create_options,
2119 (unsigned int)create_disposition,
2120 (unsigned int)file_attributes));
2121
2122 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2123 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2124 is_ntfs_stream_name(fname)) {
2125 DEBUG(2, ("open_directory: %s is a stream name!\n", fname));
2126 return NT_STATUS_NOT_A_DIRECTORY;
2127 }
2128
2129 switch( create_disposition ) {
2130 case FILE_OPEN:
2131
2132 info = FILE_WAS_OPENED;
2133
2134 /*
2135 * We want to follow symlinks here.
2136 */
2137
2138 if (SMB_VFS_STAT(conn, fname, psbuf) != 0) {
2139 return map_nt_error_from_unix(errno);
2140 }
2141
2142 break;
2143
2144 case FILE_CREATE:
2145
2146 /* If directory exists error. If directory doesn't
2147 * exist create. */
2148
2149 status = mkdir_internal(conn,
2150 fname,
2151 file_attributes,
2152 psbuf);
2153
2154 if (!NT_STATUS_IS_OK(status)) {
2155 DEBUG(2, ("open_directory: unable to create "
2156 "%s. Error was %s\n", fname,
2157 nt_errstr(status)));
2158 return status;
2159 }
2160
2161 info = FILE_WAS_CREATED;
2162 break;
2163
2164 case FILE_OPEN_IF:
2165 /*
2166 * If directory exists open. If directory doesn't
2167 * exist create.
2168 */
2169
2170 status = mkdir_internal(conn,
2171 fname,
2172 file_attributes,
2173 psbuf);
2174
2175 if (NT_STATUS_IS_OK(status)) {
2176 info = FILE_WAS_CREATED;
2177 }
2178
2179 if (NT_STATUS_EQUAL(status,
2180 NT_STATUS_OBJECT_NAME_COLLISION)) {
2181 info = FILE_WAS_OPENED;
2182 status = NT_STATUS_OK;
2183 }
2184
2185 break;
2186
2187 case FILE_SUPERSEDE:
2188 case FILE_OVERWRITE:
2189 case FILE_OVERWRITE_IF:
2190 default:
2191 DEBUG(5,("open_directory: invalid create_disposition "
2192 "0x%x for directory %s\n",
2193 (unsigned int)create_disposition, fname));
2194 return NT_STATUS_INVALID_PARAMETER;
2195 }
2196
2197 if(!S_ISDIR(psbuf->st_mode)) {
2198 DEBUG(5,("open_directory: %s is not a directory !\n",
2199 fname ));
2200 return NT_STATUS_NOT_A_DIRECTORY;
2201 }
2202
2203 status = file_new(req, conn, &fsp);
2204 if(!NT_STATUS_IS_OK(status)) {
2205 return status;
2206 }
2207
2208 /*
2209 * Setup the files_struct for it.
2210 */
2211
2212 fsp->mode = psbuf->st_mode;
2213 fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
2214 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2215 fsp->file_pid = req ? req->smbpid : 0;
2216 fsp->can_lock = False;
2217 fsp->can_read = False;
2218 fsp->can_write = False;
2219
2220 fsp->share_access = share_access;
2221 fsp->fh->private_options = create_options;
2222 fsp->access_mask = access_mask;
2223
2224 fsp->print_file = False;
2225 fsp->modified = False;
2226 fsp->oplock_type = NO_OPLOCK;
2227 fsp->sent_oplock_break = NO_BREAK_SENT;
2228 fsp->is_directory = True;
2229 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2230
2231 string_set(&fsp->fsp_name,fname);
2232
2233 mtimespec = get_mtimespec(psbuf);
2234
2235 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2236 conn->connectpath,
2237 fname, &mtimespec);
2238
2239 if (lck == NULL) {
2240 DEBUG(0, ("open_directory: Could not get share mode lock for %s\n", fname));
2241 file_free(req, fsp);
2242 return NT_STATUS_SHARING_VIOLATION;
2243 }
2244
2245 status = open_mode_check(conn, fname, lck,
2246 access_mask, share_access,
2247 create_options, &dir_existed);
2248
2249 if (!NT_STATUS_IS_OK(status)) {
2250 TALLOC_FREE(lck);
2251 file_free(req, fsp);
2252 return status;
2253 }
2254
2255 set_share_mode(lck, fsp, conn->server_info->utok.uid, 0, NO_OPLOCK,
2256 True);
2257
2258 /* For directories the delete on close bit at open time seems
2259 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2260 if (create_options & FILE_DELETE_ON_CLOSE) {
2261 status = can_set_delete_on_close(fsp, True, 0);
2262 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2263 TALLOC_FREE(lck);
2264 file_free(req, fsp);
2265 return status;
2266 }
2267
2268 if (NT_STATUS_IS_OK(status)) {
2269 /* Note that here we set the *inital* delete on close flag,
2270 not the regular one. The magic gets handled in close. */
2271 fsp->initial_delete_on_close = True;
2272 }
2273 }
2274
2275 TALLOC_FREE(lck);
2276
2277 if (pinfo) {
2278 *pinfo = info;
2279 }
2280
2281 conn->num_files_open++;
2282
2283 *result = fsp;
2284 return NT_STATUS_OK;
2285 }
2286
2287 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req, const char *directory)
2288 {
2289 NTSTATUS status;
2290 SMB_STRUCT_STAT sbuf;
2291 files_struct *fsp;
2292
2293 SET_STAT_INVALID(sbuf);
2294
2295 status = open_directory(conn, req, directory, &sbuf,
2296 FILE_READ_ATTRIBUTES, /* Just a stat open */
2297 FILE_SHARE_NONE, /* Ignored for stat opens */
2298 FILE_CREATE,
2299 0,
2300 FILE_ATTRIBUTE_DIRECTORY,
2301 NULL,
2302 &fsp);
2303
2304 if (NT_STATUS_IS_OK(status)) {
2305 close_file(req, fsp, NORMAL_CLOSE);
2306 }
2307
2308 return status;
2309 }
2310
2311 /****************************************************************************
2312 Receive notification that one of our open files has been renamed by another
2313 smbd process.
2314 ****************************************************************************/
2315
2316 void msg_file_was_renamed(struct messaging_context *msg,
2317 void *private_data,
2318 uint32_t msg_type,
2319 struct server_id server_id,
2320 DATA_BLOB *data)
2321 {
2322 files_struct *fsp;
2323 char *frm = (char *)data->data;
2324 struct file_id id;
2325 const char *sharepath;
2326 const char *newname;
2327 size_t sp_len;
2328
2329 if (data->data == NULL
2330 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2331 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2332 (int)data->length));
2333 return;
2334 }
2335
2336 /* Unpack the message. */
2337 pull_file_id_16(frm, &id);
2338 sharepath = &frm[16];
2339 newname = sharepath + strlen(sharepath) + 1;
2340 sp_len = strlen(sharepath);
2341
2342 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2343 "file_id %s\n",
2344 sharepath, newname, file_id_string_tos(&id)));
2345
2346 for(fsp = file_find_di_first(id); fsp; fsp = file_find_di_next(fsp)) {
2347 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2348 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2349 fsp->fnum, fsp->fsp_name, newname ));
2350 string_set(&fsp->fsp_name, newname);
2351 } else {
2352 /* TODO. JRA. */
2353 /* Now we have the complete path we can work out if this is
2354 actually within this share and adjust newname accordingly. */
2355 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2356 "not sharepath %s) "
2357 "fnum %d from %s -> %s\n",
2358 fsp->conn->connectpath,
2359 sharepath,
2360 fsp->fnum,
2361 fsp->fsp_name,
2362 newname ));
2363 }
2364 }
2365 }
2366
2367 struct case_semantics_state {
2368 connection_struct *conn;
2369 bool case_sensitive;
2370 bool case_preserve;
2371 bool short_case_preserve;
2372 };
2373
2374 /****************************************************************************
2375 Restore case semantics.
2376 ****************************************************************************/
2377 static int restore_case_semantics(struct case_semantics_state *state)
2378 {
2379 state->conn->case_sensitive = state->case_sensitive;
2380 state->conn->case_preserve = state->case_preserve;
2381 state->conn->short_case_preserve = state->short_case_preserve;
2382 return 0;
2383 }
2384
2385 /****************************************************************************
2386 Save case semantics.
2387 ****************************************************************************/
2388 static struct case_semantics_state *set_posix_case_semantics(TALLOC_CTX *mem_ctx,
2389 connection_struct *conn)
2390 {
2391 struct case_semantics_state *result;
2392
2393 if (!(result = talloc(mem_ctx, struct case_semantics_state))) {
2394 DEBUG(0, ("talloc failed\n"));
2395 return NULL;
2396 }
2397
2398 result->conn = conn;
2399 result->case_sensitive = conn->case_sensitive;
2400 result->case_preserve = conn->case_preserve;
2401 result->short_case_preserve = conn->short_case_preserve;
2402
2403 /* Set to POSIX. */
2404 conn->case_sensitive = True;
2405 conn->case_preserve = True;
2406 conn->short_case_preserve = True;
2407
2408 talloc_set_destructor(result, restore_case_semantics);
2409
2410 return result;
2411 }
2412
2413 /*
2414 * If a main file is opened for delete, all streams need to be checked for
2415 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2416 * If that works, delete them all by setting the delete on close and close.
2417 */
2418
2419 static NTSTATUS open_streams_for_delete(connection_struct *conn,
2420 const char *fname)
2421 {
2422 struct stream_struct *stream_info;
2423 files_struct **streams;
2424 int i;
2425 unsigned int num_streams;
2426 TALLOC_CTX *frame = talloc_stackframe();
2427 NTSTATUS status;
2428
2429 status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
2430 &num_streams, &stream_info);
2431
2432 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2433 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2434 DEBUG(10, ("no streams around\n"));
2435 TALLOC_FREE(frame);
2436 return NT_STATUS_OK;
2437 }
2438
2439 if (!NT_STATUS_IS_OK(status)) {
2440 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
2441 nt_errstr(status)));
2442 goto fail;
2443 }
2444
2445 DEBUG(10, ("open_streams_for_delete found %d streams\n",
2446 num_streams));
2447
2448 if (num_streams == 0) {
2449 TALLOC_FREE(frame);
2450 return NT_STATUS_OK;
2451 }
2452
2453 streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
2454 if (streams == NULL) {
2455 DEBUG(0, ("talloc failed\n"));
2456 status = NT_STATUS_NO_MEMORY;
2457 goto fail;
2458 }
2459
2460 for (i=0; i<num_streams; i++) {
2461 char *streamname;
2462
2463 if (strequal(stream_info[i].name, "::$DATA")) {
2464 streams[i] = NULL;
2465 continue;
2466 }
2467
2468 streamname = talloc_asprintf(talloc_tos(), "%s%s", fname,
2469 stream_info[i].name);
2470
2471 if (streamname == NULL) {
2472 DEBUG(0, ("talloc_aprintf failed\n"));
2473 status = NT_STATUS_NO_MEMORY;
2474 goto fail;
2475 }
2476
2477 status = create_file_unixpath
2478 (conn, /* conn */
2479 NULL, /* req */
2480 streamname, /* fname */
2481 DELETE_ACCESS, /* access_mask */
2482 FILE_SHARE_READ | FILE_SHARE_WRITE
2483 | FILE_SHARE_DELETE, /* share_access */
2484 FILE_OPEN, /* create_disposition*/
2485 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* create_options */
2486 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
2487 0, /* oplock_request */
2488 0, /* allocation_size */
2489 NULL, /* sd */
2490 NULL, /* ea_list */
2491 &streams[i], /* result */
2492 NULL, /* pinfo */
2493 NULL); /* psbuf */
2494
2495 TALLOC_FREE(streamname);
2496
2497 if (!NT_STATUS_IS_OK(status)) {
2498 DEBUG(10, ("Could not open stream %s: %s\n",
2499 streamname, nt_errstr(status)));
2500 break;
2501 }
2502 }
2503
2504 /*
2505 * don't touch the variable "status" beyond this point :-)
2506 */
2507
2508 for (i -= 1 ; i >= 0; i--) {
2509 if (streams[i] == NULL) {
2510 continue;
2511 }
2512
2513 DEBUG(10, ("Closing stream # %d, %s\n", i,
2514 streams[i]->fsp_name));
2515 close_file(NULL, streams[i], NORMAL_CLOSE);
2516 }
2517
2518 fail:
2519 TALLOC_FREE(frame);
2520 return status;
2521 }
2522
2523 /*
2524 * Wrapper around open_file_ntcreate and open_directory
2525 */
2526
2527 NTSTATUS create_file_unixpath(connection_struct *conn,
2528 struct smb_request *req,
2529 const char *fname,
2530 uint32_t access_mask,
2531 uint32_t share_access,
2532 uint32_t create_disposition,
2533 uint32_t create_options,
2534 uint32_t file_attributes,
2535 uint32_t oplock_request,
2536 SMB_BIG_UINT allocation_size,
2537 struct security_descriptor *sd,
2538 struct ea_list *ea_list,
2539
2540 files_struct **result,
2541 int *pinfo,
2542 SMB_STRUCT_STAT *psbuf)
2543 {
2544 SMB_STRUCT_STAT sbuf;
2545 int info = FILE_WAS_OPENED;
2546 files_struct *base_fsp = NULL;
2547 files_struct *fsp = NULL;
2548 NTSTATUS status;
2549
2550 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
2551 "file_attributes = 0x%x, share_access = 0x%x, "
2552 "create_disposition = 0x%x create_options = 0x%x "
2553 "oplock_request = 0x%x ea_list = 0x%p, sd = 0x%p, "
2554 "fname = %s\n",
2555 (unsigned int)access_mask,
2556 (unsigned int)file_attributes,
2557 (unsigned int)share_access,
2558 (unsigned int)create_disposition,
2559 (unsigned int)create_options,
2560 (unsigned int)oplock_request,
2561 ea_list, sd, fname));
2562
2563 if (create_options & FILE_OPEN_BY_FILE_ID) {
2564 status = NT_STATUS_NOT_SUPPORTED;
2565 goto fail;
2566 }
2567
2568 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
2569 status = NT_STATUS_INVALID_PARAMETER;
2570 goto fail;
2571 }
2572
2573 if (req == NULL) {
2574 oplock_request |= INTERNAL_OPEN_ONLY;
2575 }
2576
2577 if (psbuf != NULL) {
2578 sbuf = *psbuf;
2579 }
2580 else {
2581 if (SMB_VFS_STAT(conn, fname, &sbuf) == -1) {
2582 SET_STAT_INVALID(sbuf);
2583 }
2584 }
2585
2586 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2587 && (access_mask & DELETE_ACCESS)
2588 && !is_ntfs_stream_name(fname)) {
2589 /*
2590 * We can't open a file with DELETE access if any of the
2591 * streams is open without FILE_SHARE_DELETE
2592 */
2593 status = open_streams_for_delete(conn, fname);
2594
2595 if (!NT_STATUS_IS_OK(status)) {
2596 goto fail;
2597 }
2598 }
2599
2600 /* This is the correct thing to do (check every time) but can_delete
2601 * is expensive (it may have to read the parent directory
2602 * permissions). So for now we're not doing it unless we have a strong
2603 * hint the client is really going to delete this file. If the client
2604 * is forcing FILE_CREATE let the filesystem take care of the
2605 * permissions. */
2606
2607 /* Setting FILE_SHARE_DELETE is the hint. */
2608
2609 if (lp_acl_check_permissions(SNUM(conn))
2610 && (create_disposition != FILE_CREATE)
2611 && (share_access & FILE_SHARE_DELETE)
2612 && (access_mask & DELETE_ACCESS)
2613 && (!can_delete_file_in_directory(conn, fname))) {
2614 status = NT_STATUS_ACCESS_DENIED;
2615 goto fail;
2616 }
2617
2618 #if 0
2619 /* We need to support SeSecurityPrivilege for this. */
2620 if ((access_mask & SEC_RIGHT_SYSTEM_SECURITY) &&
2621 !user_has_privileges(current_user.nt_user_token,
2622 &se_security)) {
2623 status = NT_STATUS_PRIVILEGE_NOT_HELD;
2624 goto fail;
2625 }
2626 #endif
2627
2628 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2629 && is_ntfs_stream_name(fname)
2630 && (!(create_options & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
2631 char *base;
2632 uint32 base_create_disposition;
2633
2634 if (create_options & FILE_DIRECTORY_FILE) {
2635 status = NT_STATUS_NOT_A_DIRECTORY;
2636 goto fail;
2637 }
2638
2639 status = split_ntfs_stream_name(talloc_tos(), fname,
2640 &base, NULL);
2641 if (!NT_STATUS_IS_OK(status)) {
2642 DEBUG(10, ("create_file_unixpath: "
2643 "split_ntfs_stream_name failed: %s\n",
2644 nt_errstr(status)));
2645 goto fail;
2646 }
2647
2648 SMB_ASSERT(!is_ntfs_stream_name(base)); /* paranoia.. */
2649
2650 switch (create_disposition) {
2651 case FILE_OPEN:
2652 base_create_disposition = FILE_OPEN;
2653 break;
2654 default:
2655 base_create_disposition = FILE_OPEN_IF;
2656 break;
2657 }
2658
2659 status = create_file_unixpath(conn, NULL, base, 0,
2660 FILE_SHARE_READ
2661 | FILE_SHARE_WRITE
2662 | FILE_SHARE_DELETE,
2663 base_create_disposition,
2664 0, 0, 0, 0, NULL, NULL,
2665 &base_fsp, NULL, NULL);
2666 if (!NT_STATUS_IS_OK(status)) {
2667 DEBUG(10, ("create_file_unixpath for base %s failed: "
2668 "%s\n", base, nt_errstr(status)));
2669 goto fail;
2670 }
2671 }
2672
2673 /*
2674 * If it's a request for a directory open, deal with it separately.
2675 */
2676
2677 if (create_options & FILE_DIRECTORY_FILE) {
2678
2679 if (create_options & FILE_NON_DIRECTORY_FILE) {
2680 status = NT_STATUS_INVALID_PARAMETER;
2681 goto fail;
2682 }
2683
2684 /* Can't open a temp directory. IFS kit test. */
2685 if (file_attributes & FILE_ATTRIBUTE_TEMPORARY) {
2686 status = NT_STATUS_INVALID_PARAMETER;
2687 goto fail;
2688 }
2689
2690 /*
2691 * We will get a create directory here if the Win32
2692 * app specified a security descriptor in the
2693 * CreateDirectory() call.
2694 */
2695
2696 oplock_request = 0;
2697 status = open_directory(
2698 conn, req, fname, &sbuf, access_mask, share_access,
2699 create_disposition, create_options, file_attributes,
2700 &info, &fsp);
2701 } else {
2702
2703 /*
2704 * Ordinary file case.
2705 */
2706
2707 status = open_file_ntcreate(
2708 conn, req, fname, &sbuf, access_mask, share_access,
2709 create_disposition, create_options, file_attributes,
2710 oplock_request, &info, &fsp);
2711
2712 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
2713
2714 /*
2715 * Fail the open if it was explicitly a non-directory
2716 * file.
2717 */
2718
2719 if (create_options & FILE_NON_DIRECTORY_FILE) {
2720 status = NT_STATUS_FILE_IS_A_DIRECTORY;
2721 goto fail;
2722 }
2723
2724 oplock_request = 0;
2725 status = open_directory(
2726 conn, req, fname, &sbuf, access_mask,
2727 share_access, create_disposition,
2728 create_options, file_attributes,
2729 &info, &fsp);
2730 }
2731 }
2732
2733 if (!NT_STATUS_IS_OK(status)) {
2734 goto fail;
2735 }
2736
2737 /*
2738 * According to the MS documentation, the only time the security
2739 * descriptor is applied to the opened file is iff we *created* the
2740 * file; an existing file stays the same.
2741 *
2742 * Also, it seems (from observation) that you can open the file with
2743 * any access mask but you can still write the sd. We need to override
2744 * the granted access before we call set_sd
2745 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
2746 */
2747
2748 if ((sd != NULL) && (info == FILE_WAS_CREATED)
2749 && lp_nt_acl_support(SNUM(conn))) {
2750
2751 uint32_t sec_info_sent = ALL_SECURITY_INFORMATION;
2752 uint32_t saved_access_mask = fsp->access_mask;
2753
2754 if (sd->owner_sid == NULL) {
2755 sec_info_sent &= ~OWNER_SECURITY_INFORMATION;
2756 }
2757 if (sd->group_sid == NULL) {
2758 sec_info_sent &= ~GROUP_SECURITY_INFORMATION;
2759 }
2760 if (sd->sacl == NULL) {
2761 sec_info_sent &= ~SACL_SECURITY_INFORMATION;
2762 }
2763 if (sd->dacl == NULL) {
2764 sec_info_sent &= ~DACL_SECURITY_INFORMATION;
2765 }
2766
2767 fsp->access_mask = FILE_GENERIC_ALL;
2768
2769 /* Convert all the generic bits. */
2770 security_acl_map_generic(sd->dacl, &file_generic_mapping);
2771 security_acl_map_generic(sd->sacl, &file_generic_mapping);
2772
2773 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
2774
2775 fsp->access_mask = saved_access_mask;
2776
2777 if (!NT_STATUS_IS_OK(status)) {
2778 goto fail;
2779 }
2780 }
2781
2782 if ((ea_list != NULL) && (info == FILE_WAS_CREATED)) {
2783 status = set_ea(conn, fsp, fname, ea_list);
2784 if (!NT_STATUS_IS_OK(status)) {
2785 goto fail;
2786 }
2787 }
2788
2789 if (!fsp->is_directory && S_ISDIR(sbuf.st_mode)) {
2790 status = NT_STATUS_ACCESS_DENIED;
2791 goto fail;
2792 }
2793
2794 /* Save the requested allocation size. */
2795 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
2796 if (allocation_size
2797 && (allocation_size > sbuf.st_size)) {
2798 fsp->initial_allocation_size = smb_roundup(
2799 fsp->conn, allocation_size);
2800 if (fsp->is_directory) {
2801 /* Can't set allocation size on a directory. */
2802 status = NT_STATUS_ACCESS_DENIED;
2803 goto fail;
2804 }
2805 if (vfs_allocate_file_space(
2806 fsp, fsp->initial_allocation_size) == -1) {
2807 status = NT_STATUS_DISK_FULL;
2808 goto fail;
2809 }
2810 } else {
2811 fsp->initial_allocation_size = smb_roundup(
2812 fsp->conn, (SMB_BIG_UINT)sbuf.st_size);
2813 }
2814 }
2815
2816 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
2817
2818 /*
2819 * Set fsp->base_fsp late enough that we can't "goto fail" anymore. In
2820 * the fail: branch we call close_file(fsp, ERROR_CLOSE) which would
2821 * also close fsp->base_fsp which we have to also do explicitly in
2822 * this routine here, as not in all "goto fail:" we have the fsp set
2823 * up already to be initialized with the base_fsp.
2824 */
2825
2826 fsp->base_fsp = base_fsp;
2827
2828 *result = fsp;
2829 if (pinfo != NULL) {
2830 *pinfo = info;
2831 }
2832 if (psbuf != NULL) {
2833 if ((fsp->fh == NULL) || (fsp->fh->fd == -1)) {
2834 *psbuf = sbuf;
2835 }
2836 else {
2837 SMB_VFS_FSTAT(fsp, psbuf);
2838 }
2839 }
2840 return NT_STATUS_OK;
2841
2842 fail:
2843 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
2844
2845 if (fsp != NULL) {
2846 close_file(req, fsp, ERROR_CLOSE);
2847 fsp = NULL;
2848 }
2849 if (base_fsp != NULL) {
2850 close_file(req, base_fsp, ERROR_CLOSE);
2851 base_fsp = NULL;
2852 }
2853 return status;
2854 }
2855
2856 NTSTATUS create_file(connection_struct *conn,
2857 struct smb_request *req,
2858 uint16_t root_dir_fid,
2859 const char *fname,
2860 uint32_t access_mask,
2861 uint32_t share_access,
2862 uint32_t create_disposition,
2863 uint32_t create_options,
2864 uint32_t file_attributes,
2865 uint32_t oplock_request,
2866 SMB_BIG_UINT allocation_size,
2867 struct security_descriptor *sd,
2868 struct ea_list *ea_list,
2869
2870 files_struct **result,
2871 int *pinfo,
2872 SMB_STRUCT_STAT *psbuf)
2873 {
2874 struct case_semantics_state *case_state = NULL;
2875 SMB_STRUCT_STAT sbuf;
2876 int info = FILE_WAS_OPENED;
2877 files_struct *fsp = NULL;
2878 NTSTATUS status;
2879
2880 DEBUG(10,("create_file: access_mask = 0x%x "
2881 "file_attributes = 0x%x, share_access = 0x%x, "
2882 "create_disposition = 0x%x create_options = 0x%x "
2883 "oplock_request = 0x%x "
2884 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
2885 "fname = %s\n",
2886 (unsigned int)access_mask,
2887 (unsigned int)file_attributes,
2888 (unsigned int)share_access,
2889 (unsigned int)create_disposition,
2890 (unsigned int)create_options,
2891 (unsigned int)oplock_request,
2892 (unsigned int)root_dir_fid,
2893 ea_list, sd, fname));
2894
2895 /*
2896 * Get the file name.
2897 */
2898
2899 if (root_dir_fid != 0) {
2900 /*
2901 * This filename is relative to a directory fid.
2902 */
2903 char *parent_fname = NULL;
2904 files_struct *dir_fsp = file_fsp(req, root_dir_fid);
2905
2906 if (dir_fsp == NULL) {
2907 status = NT_STATUS_INVALID_HANDLE;
2908 goto fail;
2909 }
2910
2911 if (!dir_fsp->is_directory) {
2912
2913 /*
2914 * Check to see if this is a mac fork of some kind.
2915 */
2916
2917 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2918 is_ntfs_stream_name(fname)) {
2919 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
2920 goto fail;
2921 }
2922
2923 /*
2924 we need to handle the case when we get a
2925 relative open relative to a file and the
2926 pathname is blank - this is a reopen!
2927 (hint from demyn plantenberg)
2928 */
2929
2930 status = NT_STATUS_INVALID_HANDLE;
2931 goto fail;
2932 }
2933
2934 if (ISDOT(dir_fsp->fsp_name)) {
2935 /*
2936 * We're at the toplevel dir, the final file name
2937 * must not contain ./, as this is filtered out
2938 * normally by srvstr_get_path and unix_convert
2939 * explicitly rejects paths containing ./.
2940 */
2941 parent_fname = talloc_strdup(talloc_tos(), "");
2942 if (parent_fname == NULL) {
2943 status = NT_STATUS_NO_MEMORY;
2944 goto fail;
2945 }
2946 } else {
2947 size_t dir_name_len = strlen(dir_fsp->fsp_name);
2948
2949 /*
2950 * Copy in the base directory name.
2951 */
2952
2953 parent_fname = TALLOC_ARRAY(talloc_tos(), char,
2954 dir_name_len+2);
2955 if (parent_fname == NULL) {
2956 status = NT_STATUS_NO_MEMORY;
2957 goto fail;
2958 }
2959 memcpy(parent_fname, dir_fsp->fsp_name,
2960 dir_name_len+1);
2961
2962 /*
2963 * Ensure it ends in a '/'.
2964 * We used TALLOC_SIZE +2 to add space for the '/'.
2965 */
2966
2967 if(dir_name_len
2968 && (parent_fname[dir_name_len-1] != '\\')
2969 && (parent_fname[dir_name_len-1] != '/')) {
2970 parent_fname[dir_name_len] = '/';
2971 parent_fname[dir_name_len+1] = '\0';
2972 }
2973 }
2974
2975 fname = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
2976 fname);
2977 if (fname == NULL) {
2978 status = NT_STATUS_NO_MEMORY;
2979 goto fail;
2980 }
2981 }
2982
2983 /*
2984 * Check to see if this is a mac fork of some kind.
2985 */
2986
2987 if (is_ntfs_stream_name(fname)) {
2988 enum FAKE_FILE_TYPE fake_file_type;
2989
2990 fake_file_type = is_fake_file(fname);
2991
2992 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
2993
2994 /*
2995 * Here we go! support for changing the disk quotas
2996 * --metze
2997 *
2998 * We need to fake up to open this MAGIC QUOTA file
2999 * and return a valid FID.
3000 *
3001 * w2k close this file directly after openening xp
3002 * also tries a QUERY_FILE_INFO on the file and then
3003 * close it
3004 */
3005 status = open_fake_file(req, conn, req->vuid,
3006 fake_file_type, fname,
3007 access_mask, &fsp);
3008 if (!NT_STATUS_IS_OK(status)) {
3009 goto fail;
3010 }
3011
3012 ZERO_STRUCT(sbuf);
3013 goto done;
3014 }
3015
3016 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3017 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3018 goto fail;
3019 }
3020 }
3021
3022 if ((req != NULL) && (req->flags2 & FLAGS2_DFS_PATHNAMES)) {
3023 char *resolved_fname;
3024
3025 status = resolve_dfspath(talloc_tos(), conn, true, fname,
3026 &resolved_fname);
3027
3028 if (!NT_STATUS_IS_OK(status)) {
3029 /*
3030 * For PATH_NOT_COVERED we had
3031 * reply_botherror(req, NT_STATUS_PATH_NOT_COVERED,
3032 * ERRSRV, ERRbadpath);
3033 * Need to fix in callers
3034 */
3035 goto fail;
3036 }
3037 fname = resolved_fname;
3038 }
3039
3040 /*
3041 * Check if POSIX semantics are wanted.
3042 */
3043
3044 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3045 case_state = set_posix_case_semantics(talloc_tos(), conn);
3046 file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
3047 }
3048
3049 {
3050 char *converted_fname;
3051
3052 SET_STAT_INVALID(sbuf);
3053
3054 status = unix_convert(talloc_tos(), conn, fname, False,
3055 &converted_fname, NULL, &sbuf);
3056 if (!NT_STATUS_IS_OK(status)) {
3057 goto fail;
3058 }
3059 fname = converted_fname;
3060 }
3061
3062 TALLOC_FREE(case_state);
3063
3064 /* All file access must go through check_name() */
3065
3066 status = check_name(conn, fname);
3067 if (!NT_STATUS_IS_OK(status)) {
3068 goto fail;
3069 }
3070
3071 status = create_file_unixpath(
3072 conn, req, fname, access_mask, share_access,
3073 create_disposition, create_options, file_attributes,
3074 oplock_request, allocation_size, sd, ea_list,
3075 &fsp, &info, &sbuf);
3076
3077 if (!NT_STATUS_IS_OK(status)) {
3078 goto fail;
3079 }
3080
3081 done:
3082 DEBUG(10, ("create_file: info=%d\n", info));
3083
3084 *result = fsp;
3085 if (pinfo != NULL) {
3086 *pinfo = info;
3087 }
3088 if (psbuf != NULL) {
3089 *psbuf = sbuf;
3090 }
3091 return NT_STATUS_OK;
3092
3093 fail:
3094 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3095
3096 if (fsp != NULL) {
3097 close_file(req, fsp, ERROR_CLOSE);
3098 fsp = NULL;
3099 }
3100 return status;
3101 }
reg import