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Start moving us closer to passing S4 RAW-ACL test using the vfs_acl_xattr module...
[Samba/ekacnet.git] / source3 / smbd / open.c
blob15645250054d927e9e5b9a5004351d46ff941fbd
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 ((access_mask & FILE_READ_DATA)||(access_mask & FILE_WRITE_DATA)) {
1210 DEBUG(10, ("open_file_ntcreate: adding FILE_READ_ATTRIBUTES "
1211 "to requested access_mask 0x%x, new mask 0x%x",
1212 access_mask,
1213 access_mask | FILE_READ_ATTRIBUTES ));
1214
1215 access_mask |= FILE_READ_ATTRIBUTES;
1216 }
1217
1218 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1219 DEBUG(0, ("No smb request but not an internal only open!\n"));
1220 return NT_STATUS_INTERNAL_ERROR;
1221 }
1222
1223 /*
1224 * Only non-internal opens can be deferred at all
1225 */
1226
1227 if ((req != NULL)
1228 && ((pml = get_open_deferred_message(req->mid)) != NULL)) {
1229 struct deferred_open_record *state =
1230 (struct deferred_open_record *)pml->private_data.data;
1231
1232 /* Remember the absolute time of the original
1233 request with this mid. We'll use it later to
1234 see if this has timed out. */
1235
1236 request_time = pml->request_time;
1237
1238 /* Remove the deferred open entry under lock. */
1239 lck = get_share_mode_lock(talloc_tos(), state->id, NULL, NULL,
1240 NULL);
1241 if (lck == NULL) {
1242 DEBUG(0, ("could not get share mode lock\n"));
1243 } else {
1244 del_deferred_open_entry(lck, req->mid);
1245 TALLOC_FREE(lck);
1246 }
1247
1248 /* Ensure we don't reprocess this message. */
1249 remove_deferred_open_smb_message(req->mid);
1250 }
1251
1252 status = check_name(conn, fname);
1253 if (!NT_STATUS_IS_OK(status)) {
1254 return status;
1255 }
1256
1257 if (!posix_open) {
1258 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1259 if (file_existed) {
1260 existing_dos_attributes = dos_mode(conn, fname, psbuf);
1261 }
1262 }
1263
1264 /* ignore any oplock requests if oplocks are disabled */
1265 if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break ||
1266 IS_VETO_OPLOCK_PATH(conn, fname)) {
1267 /* Mask off everything except the private Samba bits. */
1268 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1269 }
1270
1271 /* this is for OS/2 long file names - say we don't support them */
1272 if (!lp_posix_pathnames() && strstr(fname,".+,;=[].")) {
1273 /* OS/2 Workplace shell fix may be main code stream in a later
1274 * release. */
1275 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1276 "supported.\n"));
1277 if (use_nt_status()) {
1278 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1279 }
1280 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1281 }
1282
1283 switch( create_disposition ) {
1284 /*
1285 * Currently we're using FILE_SUPERSEDE as the same as
1286 * FILE_OVERWRITE_IF but they really are
1287 * different. FILE_SUPERSEDE deletes an existing file
1288 * (requiring delete access) then recreates it.
1289 */
1290 case FILE_SUPERSEDE:
1291 /* If file exists replace/overwrite. If file doesn't
1292 * exist create. */
1293 flags2 |= (O_CREAT | O_TRUNC);
1294 break;
1295
1296 case FILE_OVERWRITE_IF:
1297 /* If file exists replace/overwrite. If file doesn't
1298 * exist create. */
1299 flags2 |= (O_CREAT | O_TRUNC);
1300 break;
1301
1302 case FILE_OPEN:
1303 /* If file exists open. If file doesn't exist error. */
1304 if (!file_existed) {
1305 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1306 "requested for file %s and file "
1307 "doesn't exist.\n", fname ));
1308 errno = ENOENT;
1309 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1310 }
1311 break;
1312
1313 case FILE_OVERWRITE:
1314 /* If file exists overwrite. If file doesn't exist
1315 * error. */
1316 if (!file_existed) {
1317 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1318 "requested for file %s and file "
1319 "doesn't exist.\n", fname ));
1320 errno = ENOENT;
1321 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1322 }
1323 flags2 |= O_TRUNC;
1324 break;
1325
1326 case FILE_CREATE:
1327 /* If file exists error. If file doesn't exist
1328 * create. */
1329 if (file_existed) {
1330 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1331 "requested for file %s and file "
1332 "already exists.\n", fname ));
1333 if (S_ISDIR(psbuf->st_mode)) {
1334 errno = EISDIR;
1335 } else {
1336 errno = EEXIST;
1337 }
1338 return map_nt_error_from_unix(errno);
1339 }
1340 flags2 |= (O_CREAT|O_EXCL);
1341 break;
1342
1343 case FILE_OPEN_IF:
1344 /* If file exists open. If file doesn't exist
1345 * create. */
1346 flags2 |= O_CREAT;
1347 break;
1348
1349 default:
1350 return NT_STATUS_INVALID_PARAMETER;
1351 }
1352
1353 /* We only care about matching attributes on file exists and
1354 * overwrite. */
1355
1356 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1357 (create_disposition == FILE_OVERWRITE_IF))) {
1358 if (!open_match_attributes(conn, fname,
1359 existing_dos_attributes,
1360 new_dos_attributes, psbuf->st_mode,
1361 unx_mode, &new_unx_mode)) {
1362 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1363 "for file %s (%x %x) (0%o, 0%o)\n",
1364 fname, existing_dos_attributes,
1365 new_dos_attributes,
1366 (unsigned int)psbuf->st_mode,
1367 (unsigned int)unx_mode ));
1368 errno = EACCES;
1369 return NT_STATUS_ACCESS_DENIED;
1370 }
1371 }
1372
1373 /* This is a nasty hack - must fix... JRA. */
1374 if (access_mask == MAXIMUM_ALLOWED_ACCESS) {
1375 open_access_mask = access_mask = FILE_GENERIC_ALL;
1376 }
1377
1378 /*
1379 * Convert GENERIC bits to specific bits.
1380 */
1381
1382 se_map_generic(&access_mask, &file_generic_mapping);
1383 open_access_mask = access_mask;
1384
1385 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1386 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1387 }
1388
1389 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1390 "access_mask=0x%x\n", fname, access_mask ));
1391
1392 /*
1393 * Note that we ignore the append flag as append does not
1394 * mean the same thing under DOS and Unix.
1395 */
1396
1397 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1398 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1399 /* DENY_DOS opens are always underlying read-write on the
1400 file handle, no matter what the requested access mask
1401 says. */
1402 if ((create_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1403 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1404 flags = O_RDWR;
1405 } else {
1406 flags = O_WRONLY;
1407 }
1408 } else {
1409 flags = O_RDONLY;
1410 }
1411
1412 /*
1413 * Currently we only look at FILE_WRITE_THROUGH for create options.
1414 */
1415
1416 #if defined(O_SYNC)
1417 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1418 flags2 |= O_SYNC;
1419 }
1420 #endif /* O_SYNC */
1421
1422 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1423 flags2 |= O_APPEND;
1424 }
1425
1426 if (!posix_open && !CAN_WRITE(conn)) {
1427 /*
1428 * We should really return a permission denied error if either
1429 * O_CREAT or O_TRUNC are set, but for compatibility with
1430 * older versions of Samba we just AND them out.
1431 */
1432 flags2 &= ~(O_CREAT|O_TRUNC);
1433 }
1434
1435 /*
1436 * Ensure we can't write on a read-only share or file.
1437 */
1438
1439 if (flags != O_RDONLY && file_existed &&
1440 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1441 DEBUG(5,("open_file_ntcreate: write access requested for "
1442 "file %s on read only %s\n",
1443 fname, !CAN_WRITE(conn) ? "share" : "file" ));
1444 errno = EACCES;
1445 return NT_STATUS_ACCESS_DENIED;
1446 }
1447
1448 status = file_new(req, conn, &fsp);
1449 if(!NT_STATUS_IS_OK(status)) {
1450 return status;
1451 }
1452
1453 fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
1454 fsp->share_access = share_access;
1455 fsp->fh->private_options = create_options;
1456 fsp->access_mask = open_access_mask; /* We change this to the
1457 * requested access_mask after
1458 * the open is done. */
1459 fsp->posix_open = posix_open;
1460
1461 /* Ensure no SAMBA_PRIVATE bits can be set. */
1462 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1463
1464 if (timeval_is_zero(&request_time)) {
1465 request_time = fsp->open_time;
1466 }
1467
1468 if (file_existed) {
1469 struct timespec old_write_time = get_mtimespec(psbuf);
1470 id = vfs_file_id_from_sbuf(conn, psbuf);
1471
1472 lck = get_share_mode_lock(talloc_tos(), id,
1473 conn->connectpath,
1474 fname, &old_write_time);
1475
1476 if (lck == NULL) {
1477 file_free(req, fsp);
1478 DEBUG(0, ("Could not get share mode lock\n"));
1479 return NT_STATUS_SHARING_VIOLATION;
1480 }
1481
1482 /* First pass - send break only on batch oplocks. */
1483 if ((req != NULL)
1484 && delay_for_oplocks(lck, fsp, req->mid, 1,
1485 oplock_request)) {
1486 schedule_defer_open(lck, request_time, req);
1487 TALLOC_FREE(lck);
1488 file_free(req, fsp);
1489 return NT_STATUS_SHARING_VIOLATION;
1490 }
1491
1492 /* Use the client requested access mask here, not the one we
1493 * open with. */
1494 status = open_mode_check(conn, fname, lck,
1495 access_mask, share_access,
1496 create_options, &file_existed);
1497
1498 if (NT_STATUS_IS_OK(status)) {
1499 /* We might be going to allow this open. Check oplock
1500 * status again. */
1501 /* Second pass - send break for both batch or
1502 * exclusive oplocks. */
1503 if ((req != NULL)
1504 && delay_for_oplocks(lck, fsp, req->mid, 2,
1505 oplock_request)) {
1506 schedule_defer_open(lck, request_time, req);
1507 TALLOC_FREE(lck);
1508 file_free(req, fsp);
1509 return NT_STATUS_SHARING_VIOLATION;
1510 }
1511 }
1512
1513 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1514 /* DELETE_PENDING is not deferred for a second */
1515 TALLOC_FREE(lck);
1516 file_free(req, fsp);
1517 return status;
1518 }
1519
1520 if (!NT_STATUS_IS_OK(status)) {
1521 uint32 can_access_mask;
1522 bool can_access = True;
1523
1524 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1525
1526 /* Check if this can be done with the deny_dos and fcb
1527 * calls. */
1528 if (create_options &
1529 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1530 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1531 files_struct *fsp_dup;
1532
1533 if (req == NULL) {
1534 DEBUG(0, ("DOS open without an SMB "
1535 "request!\n"));
1536 TALLOC_FREE(lck);
1537 file_free(req, fsp);
1538 return NT_STATUS_INTERNAL_ERROR;
1539 }
1540
1541 /* Use the client requested access mask here,
1542 * not the one we open with. */
1543 fsp_dup = fcb_or_dos_open(req, conn, fname, id,
1544 req->smbpid,
1545 req->vuid,
1546 access_mask,
1547 share_access,
1548 create_options);
1549
1550 if (fsp_dup) {
1551 TALLOC_FREE(lck);
1552 file_free(req, fsp);
1553 if (pinfo) {
1554 *pinfo = FILE_WAS_OPENED;
1555 }
1556 conn->num_files_open++;
1557 *result = fsp_dup;
1558 return NT_STATUS_OK;
1559 }
1560 }
1561
1562 /*
1563 * This next line is a subtlety we need for
1564 * MS-Access. If a file open will fail due to share
1565 * permissions and also for security (access) reasons,
1566 * we need to return the access failed error, not the
1567 * share error. We can't open the file due to kernel
1568 * oplock deadlock (it's possible we failed above on
1569 * the open_mode_check()) so use a userspace check.
1570 */
1571
1572 if (flags & O_RDWR) {
1573 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1574 } else if (flags & O_WRONLY) {
1575 can_access_mask = FILE_WRITE_DATA;
1576 } else {
1577 can_access_mask = FILE_READ_DATA;
1578 }
1579
1580 if (((can_access_mask & FILE_WRITE_DATA) && !CAN_WRITE(conn)) ||
1581 !can_access_file_data(conn,fname,psbuf,can_access_mask)) {
1582 can_access = False;
1583 }
1584
1585 /*
1586 * If we're returning a share violation, ensure we
1587 * cope with the braindead 1 second delay.
1588 */
1589
1590 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1591 lp_defer_sharing_violations()) {
1592 struct timeval timeout;
1593 struct deferred_open_record state;
1594 int timeout_usecs;
1595
1596 /* this is a hack to speed up torture tests
1597 in 'make test' */
1598 timeout_usecs = lp_parm_int(SNUM(conn),
1599 "smbd","sharedelay",
1600 SHARING_VIOLATION_USEC_WAIT);
1601
1602 /* This is a relative time, added to the absolute
1603 request_time value to get the absolute timeout time.
1604 Note that if this is the second or greater time we enter
1605 this codepath for this particular request mid then
1606 request_time is left as the absolute time of the *first*
1607 time this request mid was processed. This is what allows
1608 the request to eventually time out. */
1609
1610 timeout = timeval_set(0, timeout_usecs);
1611
1612 /* Nothing actually uses state.delayed_for_oplocks
1613 but it's handy to differentiate in debug messages
1614 between a 30 second delay due to oplock break, and
1615 a 1 second delay for share mode conflicts. */
1616
1617 state.delayed_for_oplocks = False;
1618 state.id = id;
1619
1620 if ((req != NULL)
1621 && !request_timed_out(request_time,
1622 timeout)) {
1623 defer_open(lck, request_time, timeout,
1624 req, &state);
1625 }
1626 }
1627
1628 TALLOC_FREE(lck);
1629 if (can_access) {
1630 /*
1631 * We have detected a sharing violation here
1632 * so return the correct error code
1633 */
1634 status = NT_STATUS_SHARING_VIOLATION;
1635 } else {
1636 status = NT_STATUS_ACCESS_DENIED;
1637 }
1638 file_free(req, fsp);
1639 return status;
1640 }
1641
1642 /*
1643 * We exit this block with the share entry *locked*.....
1644 */
1645 }
1646
1647 SMB_ASSERT(!file_existed || (lck != NULL));
1648
1649 /*
1650 * Ensure we pay attention to default ACLs on directories if required.
1651 */
1652
1653 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1654 (def_acl = directory_has_default_acl(conn, parent_dir))) {
1655 unx_mode = 0777;
1656 }
1657
1658 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1659 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1660 (unsigned int)flags, (unsigned int)flags2,
1661 (unsigned int)unx_mode, (unsigned int)access_mask,
1662 (unsigned int)open_access_mask));
1663
1664 /*
1665 * open_file strips any O_TRUNC flags itself.
1666 */
1667
1668 fsp_open = open_file(fsp, conn, req, parent_dir, newname, fname, psbuf,
1669 flags|flags2, unx_mode, access_mask,
1670 open_access_mask);
1671
1672 if (!NT_STATUS_IS_OK(fsp_open)) {
1673 if (lck != NULL) {
1674 TALLOC_FREE(lck);
1675 }
1676 file_free(req, fsp);
1677 return fsp_open;
1678 }
1679
1680 if (!file_existed) {
1681 struct timespec old_write_time = get_mtimespec(psbuf);
1682 /*
1683 * Deal with the race condition where two smbd's detect the
1684 * file doesn't exist and do the create at the same time. One
1685 * of them will win and set a share mode, the other (ie. this
1686 * one) should check if the requested share mode for this
1687 * create is allowed.
1688 */
1689
1690 /*
1691 * Now the file exists and fsp is successfully opened,
1692 * fsp->dev and fsp->inode are valid and should replace the
1693 * dev=0,inode=0 from a non existent file. Spotted by
1694 * Nadav Danieli <nadavd@exanet.com>. JRA.
1695 */
1696
1697 id = fsp->file_id;
1698
1699 lck = get_share_mode_lock(talloc_tos(), id,
1700 conn->connectpath,
1701 fname, &old_write_time);
1702
1703 if (lck == NULL) {
1704 DEBUG(0, ("open_file_ntcreate: Could not get share "
1705 "mode lock for %s\n", fname));
1706 fd_close(fsp);
1707 file_free(req, fsp);
1708 return NT_STATUS_SHARING_VIOLATION;
1709 }
1710
1711 /* First pass - send break only on batch oplocks. */
1712 if ((req != NULL)
1713 && delay_for_oplocks(lck, fsp, req->mid, 1,
1714 oplock_request)) {
1715 schedule_defer_open(lck, request_time, req);
1716 TALLOC_FREE(lck);
1717 fd_close(fsp);
1718 file_free(req, fsp);
1719 return NT_STATUS_SHARING_VIOLATION;
1720 }
1721
1722 status = open_mode_check(conn, fname, lck,
1723 access_mask, share_access,
1724 create_options, &file_existed);
1725
1726 if (NT_STATUS_IS_OK(status)) {
1727 /* We might be going to allow this open. Check oplock
1728 * status again. */
1729 /* Second pass - send break for both batch or
1730 * exclusive oplocks. */
1731 if ((req != NULL)
1732 && delay_for_oplocks(lck, fsp, req->mid, 2,
1733 oplock_request)) {
1734 schedule_defer_open(lck, request_time, req);
1735 TALLOC_FREE(lck);
1736 fd_close(fsp);
1737 file_free(req, fsp);
1738 return NT_STATUS_SHARING_VIOLATION;
1739 }
1740 }
1741
1742 if (!NT_STATUS_IS_OK(status)) {
1743 struct deferred_open_record state;
1744
1745 fd_close(fsp);
1746 file_free(req, fsp);
1747
1748 state.delayed_for_oplocks = False;
1749 state.id = id;
1750
1751 /* Do it all over again immediately. In the second
1752 * round we will find that the file existed and handle
1753 * the DELETE_PENDING and FCB cases correctly. No need
1754 * to duplicate the code here. Essentially this is a
1755 * "goto top of this function", but don't tell
1756 * anybody... */
1757
1758 if (req != NULL) {
1759 defer_open(lck, request_time, timeval_zero(),
1760 req, &state);
1761 }
1762 TALLOC_FREE(lck);
1763 return status;
1764 }
1765
1766 /*
1767 * We exit this block with the share entry *locked*.....
1768 */
1769
1770 }
1771
1772 SMB_ASSERT(lck != NULL);
1773
1774 /* note that we ignore failure for the following. It is
1775 basically a hack for NFS, and NFS will never set one of
1776 these only read them. Nobody but Samba can ever set a deny
1777 mode and we have already checked our more authoritative
1778 locking database for permission to set this deny mode. If
1779 the kernel refuses the operations then the kernel is wrong.
1780 note that GPFS supports it as well - jmcd */
1781
1782 if (fsp->fh->fd != -1) {
1783 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access);
1784 if(ret_flock == -1 ){
1785
1786 TALLOC_FREE(lck);
1787 fd_close(fsp);
1788 file_free(req, fsp);
1789
1790 return NT_STATUS_SHARING_VIOLATION;
1791 }
1792 }
1793
1794 /*
1795 * At this point onwards, we can guarentee that the share entry
1796 * is locked, whether we created the file or not, and that the
1797 * deny mode is compatible with all current opens.
1798 */
1799
1800 /*
1801 * If requested, truncate the file.
1802 */
1803
1804 if (flags2&O_TRUNC) {
1805 /*
1806 * We are modifing the file after open - update the stat
1807 * struct..
1808 */
1809 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
1810 (SMB_VFS_FSTAT(fsp, psbuf)==-1)) {
1811 status = map_nt_error_from_unix(errno);
1812 TALLOC_FREE(lck);
1813 fd_close(fsp);
1814 file_free(req, fsp);
1815 return status;
1816 }
1817 }
1818
1819 /* Record the options we were opened with. */
1820 fsp->share_access = share_access;
1821 fsp->fh->private_options = create_options;
1822 fsp->access_mask = access_mask;
1823
1824 if (file_existed) {
1825 /* stat opens on existing files don't get oplocks. */
1826 if (is_stat_open(open_access_mask)) {
1827 fsp->oplock_type = NO_OPLOCK;
1828 }
1829
1830 if (!(flags2 & O_TRUNC)) {
1831 info = FILE_WAS_OPENED;
1832 } else {
1833 info = FILE_WAS_OVERWRITTEN;
1834 }
1835 } else {
1836 info = FILE_WAS_CREATED;
1837 }
1838
1839 if (pinfo) {
1840 *pinfo = info;
1841 }
1842
1843 /*
1844 * Setup the oplock info in both the shared memory and
1845 * file structs.
1846 */
1847
1848 if ((fsp->oplock_type != NO_OPLOCK) &&
1849 (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK)) {
1850 if (!set_file_oplock(fsp, fsp->oplock_type)) {
1851 /* Could not get the kernel oplock */
1852 fsp->oplock_type = NO_OPLOCK;
1853 }
1854 }
1855
1856 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
1857 new_file_created = True;
1858 }
1859
1860 set_share_mode(lck, fsp, conn->server_info->utok.uid, 0,
1861 fsp->oplock_type, new_file_created);
1862
1863 /* Handle strange delete on close create semantics. */
1864 if ((create_options & FILE_DELETE_ON_CLOSE)
1865 && (((conn->fs_capabilities & FILE_NAMED_STREAMS)
1866 && is_ntfs_stream_name(fname))
1867 || can_set_initial_delete_on_close(lck))) {
1868 status = can_set_delete_on_close(fsp, True, new_dos_attributes);
1869
1870 if (!NT_STATUS_IS_OK(status)) {
1871 /* Remember to delete the mode we just added. */
1872 del_share_mode(lck, fsp);
1873 TALLOC_FREE(lck);
1874 fd_close(fsp);
1875 file_free(req, fsp);
1876 return status;
1877 }
1878 /* Note that here we set the *inital* delete on close flag,
1879 not the regular one. The magic gets handled in close. */
1880 fsp->initial_delete_on_close = True;
1881 }
1882
1883 if (new_file_created) {
1884 /* Files should be initially set as archive */
1885 if (lp_map_archive(SNUM(conn)) ||
1886 lp_store_dos_attributes(SNUM(conn))) {
1887 if (!posix_open) {
1888 SMB_STRUCT_STAT tmp_sbuf;
1889 SET_STAT_INVALID(tmp_sbuf);
1890 if (file_set_dosmode(
1891 conn, fname,
1892 new_dos_attributes | aARCH,
1893 &tmp_sbuf, parent_dir,
1894 true) == 0) {
1895 unx_mode = tmp_sbuf.st_mode;
1896 }
1897 }
1898 }
1899 }
1900
1901 /*
1902 * Take care of inherited ACLs on created files - if default ACL not
1903 * selected.
1904 */
1905
1906 if (!posix_open && !file_existed && !def_acl) {
1907
1908 int saved_errno = errno; /* We might get ENOSYS in the next
1909 * call.. */
1910
1911 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
1912 errno == ENOSYS) {
1913 errno = saved_errno; /* Ignore ENOSYS */
1914 }
1915
1916 } else if (new_unx_mode) {
1917
1918 int ret = -1;
1919
1920 /* Attributes need changing. File already existed. */
1921
1922 {
1923 int saved_errno = errno; /* We might get ENOSYS in the
1924 * next call.. */
1925 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
1926
1927 if (ret == -1 && errno == ENOSYS) {
1928 errno = saved_errno; /* Ignore ENOSYS */
1929 } else {
1930 DEBUG(5, ("open_file_ntcreate: reset "
1931 "attributes of file %s to 0%o\n",
1932 fname, (unsigned int)new_unx_mode));
1933 ret = 0; /* Don't do the fchmod below. */
1934 }
1935 }
1936
1937 if ((ret == -1) &&
1938 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
1939 DEBUG(5, ("open_file_ntcreate: failed to reset "
1940 "attributes of file %s to 0%o\n",
1941 fname, (unsigned int)new_unx_mode));
1942 }
1943
1944 /* If this is a successful open, we must remove any deferred open
1945 * records. */
1946 if (req != NULL) {
1947 del_deferred_open_entry(lck, req->mid);
1948 }
1949 TALLOC_FREE(lck);
1950
1951 conn->num_files_open++;
1952
1953 *result = fsp;
1954 return NT_STATUS_OK;
1955 }
1956
1957 /****************************************************************************
1958 Open a file for for write to ensure that we can fchmod it.
1959 ****************************************************************************/
1960
1961 NTSTATUS open_file_fchmod(struct smb_request *req, connection_struct *conn,
1962 const char *fname,
1963 SMB_STRUCT_STAT *psbuf, files_struct **result)
1964 {
1965 files_struct *fsp = NULL;
1966 NTSTATUS status;
1967
1968 if (!VALID_STAT(*psbuf)) {
1969 return NT_STATUS_INVALID_PARAMETER;
1970 }
1971
1972 status = file_new(req, conn, &fsp);
1973 if(!NT_STATUS_IS_OK(status)) {
1974 return status;
1975 }
1976
1977 /* note! we must use a non-zero desired access or we don't get
1978 a real file descriptor. Oh what a twisted web we weave. */
1979 status = open_file(fsp, conn, NULL, NULL, NULL, fname, psbuf, O_WRONLY,
1980 0, FILE_WRITE_DATA, FILE_WRITE_DATA);
1981
1982 /*
1983 * This is not a user visible file open.
1984 * Don't set a share mode and don't increment
1985 * the conn->num_files_open.
1986 */
1987
1988 if (!NT_STATUS_IS_OK(status)) {
1989 file_free(req, fsp);
1990 return status;
1991 }
1992
1993 *result = fsp;
1994 return NT_STATUS_OK;
1995 }
1996
1997 /****************************************************************************
1998 Close the fchmod file fd - ensure no locks are lost.
1999 ****************************************************************************/
2000
2001 NTSTATUS close_file_fchmod(struct smb_request *req, files_struct *fsp)
2002 {
2003 NTSTATUS status = fd_close(fsp);
2004 file_free(req, fsp);
2005 return status;
2006 }
2007
2008 static NTSTATUS mkdir_internal(connection_struct *conn,
2009 const char *name,
2010 uint32 file_attributes,
2011 SMB_STRUCT_STAT *psbuf)
2012 {
2013 mode_t mode;
2014 char *parent_dir;
2015 const char *dirname;
2016 NTSTATUS status;
2017 bool posix_open = false;
2018
2019 if(!CAN_WRITE(conn)) {
2020 DEBUG(5,("mkdir_internal: failing create on read-only share "
2021 "%s\n", lp_servicename(SNUM(conn))));
2022 return NT_STATUS_ACCESS_DENIED;
2023 }
2024
2025 status = check_name(conn, name);
2026 if (!NT_STATUS_IS_OK(status)) {
2027 return status;
2028 }
2029
2030 if (!parent_dirname_talloc(talloc_tos(), name, &parent_dir,
2031 &dirname)) {
2032 return NT_STATUS_NO_MEMORY;
2033 }
2034
2035 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2036 posix_open = true;
2037 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2038 } else {
2039 mode = unix_mode(conn, aDIR, name, parent_dir);
2040 }
2041
2042 if (SMB_VFS_MKDIR(conn, name, mode) != 0) {
2043 return map_nt_error_from_unix(errno);
2044 }
2045
2046 /* Ensure we're checking for a symlink here.... */
2047 /* We don't want to get caught by a symlink racer. */
2048
2049 if (SMB_VFS_LSTAT(conn, name, psbuf) == -1) {
2050 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2051 name, strerror(errno)));
2052 return map_nt_error_from_unix(errno);
2053 }
2054
2055 if (!S_ISDIR(psbuf->st_mode)) {
2056 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2057 name));
2058 return NT_STATUS_ACCESS_DENIED;
2059 }
2060
2061 if (lp_store_dos_attributes(SNUM(conn))) {
2062 if (!posix_open) {
2063 file_set_dosmode(conn, name,
2064 file_attributes | aDIR, NULL,
2065 parent_dir,
2066 true);
2067 }
2068 }
2069
2070 if (lp_inherit_perms(SNUM(conn))) {
2071 inherit_access_posix_acl(conn, parent_dir, name, mode);
2072 }
2073
2074 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2075 /*
2076 * Check if high bits should have been set,
2077 * then (if bits are missing): add them.
2078 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2079 * dir.
2080 */
2081 if (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO) && (mode & ~psbuf->st_mode)) {
2082 SMB_VFS_CHMOD(conn, name,
2083 psbuf->st_mode | (mode & ~psbuf->st_mode));
2084 }
2085 }
2086
2087 /* Change the owner if required. */
2088 if (lp_inherit_owner(SNUM(conn))) {
2089 change_dir_owner_to_parent(conn, parent_dir, name, psbuf);
2090 }
2091
2092 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2093 name);
2094
2095 return NT_STATUS_OK;
2096 }
2097
2098 /****************************************************************************
2099 Open a directory from an NT SMB call.
2100 ****************************************************************************/
2101
2102 NTSTATUS open_directory(connection_struct *conn,
2103 struct smb_request *req,
2104 const char *fname,
2105 SMB_STRUCT_STAT *psbuf,
2106 uint32 access_mask,
2107 uint32 share_access,
2108 uint32 create_disposition,
2109 uint32 create_options,
2110 uint32 file_attributes,
2111 int *pinfo,
2112 files_struct **result)
2113 {
2114 files_struct *fsp = NULL;
2115 bool dir_existed = VALID_STAT(*psbuf) ? True : False;
2116 struct share_mode_lock *lck = NULL;
2117 NTSTATUS status;
2118 struct timespec mtimespec;
2119 int info = 0;
2120
2121 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2122 "share_access = 0x%x create_options = 0x%x, "
2123 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2124 fname,
2125 (unsigned int)access_mask,
2126 (unsigned int)share_access,
2127 (unsigned int)create_options,
2128 (unsigned int)create_disposition,
2129 (unsigned int)file_attributes));
2130
2131 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2132 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2133 is_ntfs_stream_name(fname)) {
2134 DEBUG(2, ("open_directory: %s is a stream name!\n", fname));
2135 return NT_STATUS_NOT_A_DIRECTORY;
2136 }
2137
2138 switch( create_disposition ) {
2139 case FILE_OPEN:
2140
2141 info = FILE_WAS_OPENED;
2142
2143 /*
2144 * We want to follow symlinks here.
2145 */
2146
2147 if (SMB_VFS_STAT(conn, fname, psbuf) != 0) {
2148 return map_nt_error_from_unix(errno);
2149 }
2150
2151 break;
2152
2153 case FILE_CREATE:
2154
2155 /* If directory exists error. If directory doesn't
2156 * exist create. */
2157
2158 status = mkdir_internal(conn,
2159 fname,
2160 file_attributes,
2161 psbuf);
2162
2163 if (!NT_STATUS_IS_OK(status)) {
2164 DEBUG(2, ("open_directory: unable to create "
2165 "%s. Error was %s\n", fname,
2166 nt_errstr(status)));
2167 return status;
2168 }
2169
2170 info = FILE_WAS_CREATED;
2171 break;
2172
2173 case FILE_OPEN_IF:
2174 /*
2175 * If directory exists open. If directory doesn't
2176 * exist create.
2177 */
2178
2179 status = mkdir_internal(conn,
2180 fname,
2181 file_attributes,
2182 psbuf);
2183
2184 if (NT_STATUS_IS_OK(status)) {
2185 info = FILE_WAS_CREATED;
2186 }
2187
2188 if (NT_STATUS_EQUAL(status,
2189 NT_STATUS_OBJECT_NAME_COLLISION)) {
2190 info = FILE_WAS_OPENED;
2191 status = NT_STATUS_OK;
2192 }
2193
2194 break;
2195
2196 case FILE_SUPERSEDE:
2197 case FILE_OVERWRITE:
2198 case FILE_OVERWRITE_IF:
2199 default:
2200 DEBUG(5,("open_directory: invalid create_disposition "
2201 "0x%x for directory %s\n",
2202 (unsigned int)create_disposition, fname));
2203 return NT_STATUS_INVALID_PARAMETER;
2204 }
2205
2206 if(!S_ISDIR(psbuf->st_mode)) {
2207 DEBUG(5,("open_directory: %s is not a directory !\n",
2208 fname ));
2209 return NT_STATUS_NOT_A_DIRECTORY;
2210 }
2211
2212 status = file_new(req, conn, &fsp);
2213 if(!NT_STATUS_IS_OK(status)) {
2214 return status;
2215 }
2216
2217 /*
2218 * Setup the files_struct for it.
2219 */
2220
2221 fsp->mode = psbuf->st_mode;
2222 fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
2223 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2224 fsp->file_pid = req ? req->smbpid : 0;
2225 fsp->can_lock = False;
2226 fsp->can_read = False;
2227 fsp->can_write = False;
2228
2229 fsp->share_access = share_access;
2230 fsp->fh->private_options = create_options;
2231 fsp->access_mask = access_mask;
2232
2233 fsp->print_file = False;
2234 fsp->modified = False;
2235 fsp->oplock_type = NO_OPLOCK;
2236 fsp->sent_oplock_break = NO_BREAK_SENT;
2237 fsp->is_directory = True;
2238 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2239
2240 string_set(&fsp->fsp_name,fname);
2241
2242 mtimespec = get_mtimespec(psbuf);
2243
2244 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2245 conn->connectpath,
2246 fname, &mtimespec);
2247
2248 if (lck == NULL) {
2249 DEBUG(0, ("open_directory: Could not get share mode lock for %s\n", fname));
2250 file_free(req, fsp);
2251 return NT_STATUS_SHARING_VIOLATION;
2252 }
2253
2254 status = open_mode_check(conn, fname, lck,
2255 access_mask, share_access,
2256 create_options, &dir_existed);
2257
2258 if (!NT_STATUS_IS_OK(status)) {
2259 TALLOC_FREE(lck);
2260 file_free(req, fsp);
2261 return status;
2262 }
2263
2264 set_share_mode(lck, fsp, conn->server_info->utok.uid, 0, NO_OPLOCK,
2265 True);
2266
2267 /* For directories the delete on close bit at open time seems
2268 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2269 if (create_options & FILE_DELETE_ON_CLOSE) {
2270 status = can_set_delete_on_close(fsp, True, 0);
2271 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2272 TALLOC_FREE(lck);
2273 file_free(req, fsp);
2274 return status;
2275 }
2276
2277 if (NT_STATUS_IS_OK(status)) {
2278 /* Note that here we set the *inital* delete on close flag,
2279 not the regular one. The magic gets handled in close. */
2280 fsp->initial_delete_on_close = True;
2281 }
2282 }
2283
2284 TALLOC_FREE(lck);
2285
2286 if (pinfo) {
2287 *pinfo = info;
2288 }
2289
2290 conn->num_files_open++;
2291
2292 *result = fsp;
2293 return NT_STATUS_OK;
2294 }
2295
2296 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req, const char *directory)
2297 {
2298 NTSTATUS status;
2299 SMB_STRUCT_STAT sbuf;
2300 files_struct *fsp;
2301
2302 SET_STAT_INVALID(sbuf);
2303
2304 status = open_directory(conn, req, directory, &sbuf,
2305 FILE_READ_ATTRIBUTES, /* Just a stat open */
2306 FILE_SHARE_NONE, /* Ignored for stat opens */
2307 FILE_CREATE,
2308 0,
2309 FILE_ATTRIBUTE_DIRECTORY,
2310 NULL,
2311 &fsp);
2312
2313 if (NT_STATUS_IS_OK(status)) {
2314 close_file(req, fsp, NORMAL_CLOSE);
2315 }
2316
2317 return status;
2318 }
2319
2320 /****************************************************************************
2321 Receive notification that one of our open files has been renamed by another
2322 smbd process.
2323 ****************************************************************************/
2324
2325 void msg_file_was_renamed(struct messaging_context *msg,
2326 void *private_data,
2327 uint32_t msg_type,
2328 struct server_id server_id,
2329 DATA_BLOB *data)
2330 {
2331 files_struct *fsp;
2332 char *frm = (char *)data->data;
2333 struct file_id id;
2334 const char *sharepath;
2335 const char *newname;
2336 size_t sp_len;
2337
2338 if (data->data == NULL
2339 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2340 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2341 (int)data->length));
2342 return;
2343 }
2344
2345 /* Unpack the message. */
2346 pull_file_id_16(frm, &id);
2347 sharepath = &frm[16];
2348 newname = sharepath + strlen(sharepath) + 1;
2349 sp_len = strlen(sharepath);
2350
2351 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2352 "file_id %s\n",
2353 sharepath, newname, file_id_string_tos(&id)));
2354
2355 for(fsp = file_find_di_first(id); fsp; fsp = file_find_di_next(fsp)) {
2356 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2357 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2358 fsp->fnum, fsp->fsp_name, newname ));
2359 string_set(&fsp->fsp_name, newname);
2360 } else {
2361 /* TODO. JRA. */
2362 /* Now we have the complete path we can work out if this is
2363 actually within this share and adjust newname accordingly. */
2364 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2365 "not sharepath %s) "
2366 "fnum %d from %s -> %s\n",
2367 fsp->conn->connectpath,
2368 sharepath,
2369 fsp->fnum,
2370 fsp->fsp_name,
2371 newname ));
2372 }
2373 }
2374 }
2375
2376 struct case_semantics_state {
2377 connection_struct *conn;
2378 bool case_sensitive;
2379 bool case_preserve;
2380 bool short_case_preserve;
2381 };
2382
2383 /****************************************************************************
2384 Restore case semantics.
2385 ****************************************************************************/
2386 static int restore_case_semantics(struct case_semantics_state *state)
2387 {
2388 state->conn->case_sensitive = state->case_sensitive;
2389 state->conn->case_preserve = state->case_preserve;
2390 state->conn->short_case_preserve = state->short_case_preserve;
2391 return 0;
2392 }
2393
2394 /****************************************************************************
2395 Save case semantics.
2396 ****************************************************************************/
2397 static struct case_semantics_state *set_posix_case_semantics(TALLOC_CTX *mem_ctx,
2398 connection_struct *conn)
2399 {
2400 struct case_semantics_state *result;
2401
2402 if (!(result = talloc(mem_ctx, struct case_semantics_state))) {
2403 DEBUG(0, ("talloc failed\n"));
2404 return NULL;
2405 }
2406
2407 result->conn = conn;
2408 result->case_sensitive = conn->case_sensitive;
2409 result->case_preserve = conn->case_preserve;
2410 result->short_case_preserve = conn->short_case_preserve;
2411
2412 /* Set to POSIX. */
2413 conn->case_sensitive = True;
2414 conn->case_preserve = True;
2415 conn->short_case_preserve = True;
2416
2417 talloc_set_destructor(result, restore_case_semantics);
2418
2419 return result;
2420 }
2421
2422 /*
2423 * If a main file is opened for delete, all streams need to be checked for
2424 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2425 * If that works, delete them all by setting the delete on close and close.
2426 */
2427
2428 static NTSTATUS open_streams_for_delete(connection_struct *conn,
2429 const char *fname)
2430 {
2431 struct stream_struct *stream_info;
2432 files_struct **streams;
2433 int i;
2434 unsigned int num_streams;
2435 TALLOC_CTX *frame = talloc_stackframe();
2436 NTSTATUS status;
2437
2438 status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
2439 &num_streams, &stream_info);
2440
2441 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2442 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2443 DEBUG(10, ("no streams around\n"));
2444 TALLOC_FREE(frame);
2445 return NT_STATUS_OK;
2446 }
2447
2448 if (!NT_STATUS_IS_OK(status)) {
2449 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
2450 nt_errstr(status)));
2451 goto fail;
2452 }
2453
2454 DEBUG(10, ("open_streams_for_delete found %d streams\n",
2455 num_streams));
2456
2457 if (num_streams == 0) {
2458 TALLOC_FREE(frame);
2459 return NT_STATUS_OK;
2460 }
2461
2462 streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
2463 if (streams == NULL) {
2464 DEBUG(0, ("talloc failed\n"));
2465 status = NT_STATUS_NO_MEMORY;
2466 goto fail;
2467 }
2468
2469 for (i=0; i<num_streams; i++) {
2470 char *streamname;
2471
2472 if (strequal(stream_info[i].name, "::$DATA")) {
2473 streams[i] = NULL;
2474 continue;
2475 }
2476
2477 streamname = talloc_asprintf(talloc_tos(), "%s%s", fname,
2478 stream_info[i].name);
2479
2480 if (streamname == NULL) {
2481 DEBUG(0, ("talloc_aprintf failed\n"));
2482 status = NT_STATUS_NO_MEMORY;
2483 goto fail;
2484 }
2485
2486 status = create_file_unixpath
2487 (conn, /* conn */
2488 NULL, /* req */
2489 streamname, /* fname */
2490 DELETE_ACCESS, /* access_mask */
2491 FILE_SHARE_READ | FILE_SHARE_WRITE
2492 | FILE_SHARE_DELETE, /* share_access */
2493 FILE_OPEN, /* create_disposition*/
2494 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* create_options */
2495 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
2496 0, /* oplock_request */
2497 0, /* allocation_size */
2498 NULL, /* sd */
2499 NULL, /* ea_list */
2500 &streams[i], /* result */
2501 NULL, /* pinfo */
2502 NULL); /* psbuf */
2503
2504 TALLOC_FREE(streamname);
2505
2506 if (!NT_STATUS_IS_OK(status)) {
2507 DEBUG(10, ("Could not open stream %s: %s\n",
2508 streamname, nt_errstr(status)));
2509 break;
2510 }
2511 }
2512
2513 /*
2514 * don't touch the variable "status" beyond this point :-)
2515 */
2516
2517 for (i -= 1 ; i >= 0; i--) {
2518 if (streams[i] == NULL) {
2519 continue;
2520 }
2521
2522 DEBUG(10, ("Closing stream # %d, %s\n", i,
2523 streams[i]->fsp_name));
2524 close_file(NULL, streams[i], NORMAL_CLOSE);
2525 }
2526
2527 fail:
2528 TALLOC_FREE(frame);
2529 return status;
2530 }
2531
2532 /*
2533 * Wrapper around open_file_ntcreate and open_directory
2534 */
2535
2536 NTSTATUS create_file_unixpath(connection_struct *conn,
2537 struct smb_request *req,
2538 const char *fname,
2539 uint32_t access_mask,
2540 uint32_t share_access,
2541 uint32_t create_disposition,
2542 uint32_t create_options,
2543 uint32_t file_attributes,
2544 uint32_t oplock_request,
2545 uint64_t allocation_size,
2546 struct security_descriptor *sd,
2547 struct ea_list *ea_list,
2548
2549 files_struct **result,
2550 int *pinfo,
2551 SMB_STRUCT_STAT *psbuf)
2552 {
2553 SMB_STRUCT_STAT sbuf;
2554 int info = FILE_WAS_OPENED;
2555 files_struct *base_fsp = NULL;
2556 files_struct *fsp = NULL;
2557 NTSTATUS status;
2558
2559 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
2560 "file_attributes = 0x%x, share_access = 0x%x, "
2561 "create_disposition = 0x%x create_options = 0x%x "
2562 "oplock_request = 0x%x ea_list = 0x%p, sd = 0x%p, "
2563 "fname = %s\n",
2564 (unsigned int)access_mask,
2565 (unsigned int)file_attributes,
2566 (unsigned int)share_access,
2567 (unsigned int)create_disposition,
2568 (unsigned int)create_options,
2569 (unsigned int)oplock_request,
2570 ea_list, sd, fname));
2571
2572 if (create_options & FILE_OPEN_BY_FILE_ID) {
2573 status = NT_STATUS_NOT_SUPPORTED;
2574 goto fail;
2575 }
2576
2577 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
2578 status = NT_STATUS_INVALID_PARAMETER;
2579 goto fail;
2580 }
2581
2582 if (req == NULL) {
2583 oplock_request |= INTERNAL_OPEN_ONLY;
2584 }
2585
2586 if (psbuf != NULL) {
2587 sbuf = *psbuf;
2588 }
2589 else {
2590 if (SMB_VFS_STAT(conn, fname, &sbuf) == -1) {
2591 SET_STAT_INVALID(sbuf);
2592 }
2593 }
2594
2595 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2596 && (access_mask & DELETE_ACCESS)
2597 && !is_ntfs_stream_name(fname)) {
2598 /*
2599 * We can't open a file with DELETE access if any of the
2600 * streams is open without FILE_SHARE_DELETE
2601 */
2602 status = open_streams_for_delete(conn, fname);
2603
2604 if (!NT_STATUS_IS_OK(status)) {
2605 goto fail;
2606 }
2607 }
2608
2609 /* This is the correct thing to do (check every time) but can_delete
2610 * is expensive (it may have to read the parent directory
2611 * permissions). So for now we're not doing it unless we have a strong
2612 * hint the client is really going to delete this file. If the client
2613 * is forcing FILE_CREATE let the filesystem take care of the
2614 * permissions. */
2615
2616 /* Setting FILE_SHARE_DELETE is the hint. */
2617
2618 if (lp_acl_check_permissions(SNUM(conn))
2619 && (create_disposition != FILE_CREATE)
2620 && (share_access & FILE_SHARE_DELETE)
2621 && (access_mask & DELETE_ACCESS)
2622 && (!can_delete_file_in_directory(conn, fname))) {
2623 status = NT_STATUS_ACCESS_DENIED;
2624 goto fail;
2625 }
2626
2627 #if 0
2628 /* We need to support SeSecurityPrivilege for this. */
2629 if ((access_mask & SEC_RIGHT_SYSTEM_SECURITY) &&
2630 !user_has_privileges(current_user.nt_user_token,
2631 &se_security)) {
2632 status = NT_STATUS_PRIVILEGE_NOT_HELD;
2633 goto fail;
2634 }
2635 #endif
2636
2637 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2638 && is_ntfs_stream_name(fname)
2639 && (!(create_options & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
2640 char *base;
2641 uint32 base_create_disposition;
2642
2643 if (create_options & FILE_DIRECTORY_FILE) {
2644 status = NT_STATUS_NOT_A_DIRECTORY;
2645 goto fail;
2646 }
2647
2648 status = split_ntfs_stream_name(talloc_tos(), fname,
2649 &base, NULL);
2650 if (!NT_STATUS_IS_OK(status)) {
2651 DEBUG(10, ("create_file_unixpath: "
2652 "split_ntfs_stream_name failed: %s\n",
2653 nt_errstr(status)));
2654 goto fail;
2655 }
2656
2657 SMB_ASSERT(!is_ntfs_stream_name(base)); /* paranoia.. */
2658
2659 switch (create_disposition) {
2660 case FILE_OPEN:
2661 base_create_disposition = FILE_OPEN;
2662 break;
2663 default:
2664 base_create_disposition = FILE_OPEN_IF;
2665 break;
2666 }
2667
2668 status = create_file_unixpath(conn, NULL, base, 0,
2669 FILE_SHARE_READ
2670 | FILE_SHARE_WRITE
2671 | FILE_SHARE_DELETE,
2672 base_create_disposition,
2673 0, 0, 0, 0, NULL, NULL,
2674 &base_fsp, NULL, NULL);
2675 if (!NT_STATUS_IS_OK(status)) {
2676 DEBUG(10, ("create_file_unixpath for base %s failed: "
2677 "%s\n", base, nt_errstr(status)));
2678 goto fail;
2679 }
2680 }
2681
2682 /*
2683 * If it's a request for a directory open, deal with it separately.
2684 */
2685
2686 if (create_options & FILE_DIRECTORY_FILE) {
2687
2688 if (create_options & FILE_NON_DIRECTORY_FILE) {
2689 status = NT_STATUS_INVALID_PARAMETER;
2690 goto fail;
2691 }
2692
2693 /* Can't open a temp directory. IFS kit test. */
2694 if (file_attributes & FILE_ATTRIBUTE_TEMPORARY) {
2695 status = NT_STATUS_INVALID_PARAMETER;
2696 goto fail;
2697 }
2698
2699 /*
2700 * We will get a create directory here if the Win32
2701 * app specified a security descriptor in the
2702 * CreateDirectory() call.
2703 */
2704
2705 oplock_request = 0;
2706 status = open_directory(
2707 conn, req, fname, &sbuf, access_mask, share_access,
2708 create_disposition, create_options, file_attributes,
2709 &info, &fsp);
2710 } else {
2711
2712 /*
2713 * Ordinary file case.
2714 */
2715
2716 status = open_file_ntcreate(
2717 conn, req, fname, &sbuf, access_mask, share_access,
2718 create_disposition, create_options, file_attributes,
2719 oplock_request, &info, &fsp);
2720
2721 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
2722
2723 /*
2724 * Fail the open if it was explicitly a non-directory
2725 * file.
2726 */
2727
2728 if (create_options & FILE_NON_DIRECTORY_FILE) {
2729 status = NT_STATUS_FILE_IS_A_DIRECTORY;
2730 goto fail;
2731 }
2732
2733 oplock_request = 0;
2734 status = open_directory(
2735 conn, req, fname, &sbuf, access_mask,
2736 share_access, create_disposition,
2737 create_options, file_attributes,
2738 &info, &fsp);
2739 }
2740 }
2741
2742 if (!NT_STATUS_IS_OK(status)) {
2743 goto fail;
2744 }
2745
2746 /*
2747 * According to the MS documentation, the only time the security
2748 * descriptor is applied to the opened file is iff we *created* the
2749 * file; an existing file stays the same.
2750 *
2751 * Also, it seems (from observation) that you can open the file with
2752 * any access mask but you can still write the sd. We need to override
2753 * the granted access before we call set_sd
2754 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
2755 */
2756
2757 if ((sd != NULL) && (info == FILE_WAS_CREATED)
2758 && lp_nt_acl_support(SNUM(conn))) {
2759
2760 uint32_t sec_info_sent = ALL_SECURITY_INFORMATION;
2761 uint32_t saved_access_mask = fsp->access_mask;
2762
2763 if (sd->owner_sid == NULL) {
2764 sec_info_sent &= ~OWNER_SECURITY_INFORMATION;
2765 }
2766 if (sd->group_sid == NULL) {
2767 sec_info_sent &= ~GROUP_SECURITY_INFORMATION;
2768 }
2769 if (sd->sacl == NULL) {
2770 sec_info_sent &= ~SACL_SECURITY_INFORMATION;
2771 }
2772 if (sd->dacl == NULL) {
2773 sec_info_sent &= ~DACL_SECURITY_INFORMATION;
2774 }
2775
2776 fsp->access_mask = FILE_GENERIC_ALL;
2777
2778 /* Convert all the generic bits. */
2779 security_acl_map_generic(sd->dacl, &file_generic_mapping);
2780 security_acl_map_generic(sd->sacl, &file_generic_mapping);
2781
2782 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
2783
2784 fsp->access_mask = saved_access_mask;
2785
2786 if (!NT_STATUS_IS_OK(status)) {
2787 goto fail;
2788 }
2789 }
2790
2791 if ((ea_list != NULL) && (info == FILE_WAS_CREATED)) {
2792 status = set_ea(conn, fsp, fname, ea_list);
2793 if (!NT_STATUS_IS_OK(status)) {
2794 goto fail;
2795 }
2796 }
2797
2798 if (!fsp->is_directory && S_ISDIR(sbuf.st_mode)) {
2799 status = NT_STATUS_ACCESS_DENIED;
2800 goto fail;
2801 }
2802
2803 /* Save the requested allocation size. */
2804 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
2805 if (allocation_size
2806 && (allocation_size > sbuf.st_size)) {
2807 fsp->initial_allocation_size = smb_roundup(
2808 fsp->conn, allocation_size);
2809 if (fsp->is_directory) {
2810 /* Can't set allocation size on a directory. */
2811 status = NT_STATUS_ACCESS_DENIED;
2812 goto fail;
2813 }
2814 if (vfs_allocate_file_space(
2815 fsp, fsp->initial_allocation_size) == -1) {
2816 status = NT_STATUS_DISK_FULL;
2817 goto fail;
2818 }
2819 } else {
2820 fsp->initial_allocation_size = smb_roundup(
2821 fsp->conn, (uint64_t)sbuf.st_size);
2822 }
2823 }
2824
2825 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
2826
2827 /*
2828 * Set fsp->base_fsp late enough that we can't "goto fail" anymore. In
2829 * the fail: branch we call close_file(fsp, ERROR_CLOSE) which would
2830 * also close fsp->base_fsp which we have to also do explicitly in
2831 * this routine here, as not in all "goto fail:" we have the fsp set
2832 * up already to be initialized with the base_fsp.
2833 */
2834
2835 fsp->base_fsp = base_fsp;
2836
2837 *result = fsp;
2838 if (pinfo != NULL) {
2839 *pinfo = info;
2840 }
2841 if (psbuf != NULL) {
2842 if ((fsp->fh == NULL) || (fsp->fh->fd == -1)) {
2843 *psbuf = sbuf;
2844 }
2845 else {
2846 SMB_VFS_FSTAT(fsp, psbuf);
2847 }
2848 }
2849 return NT_STATUS_OK;
2850
2851 fail:
2852 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
2853
2854 if (fsp != NULL) {
2855 close_file(req, fsp, ERROR_CLOSE);
2856 fsp = NULL;
2857 }
2858 if (base_fsp != NULL) {
2859 close_file(req, base_fsp, ERROR_CLOSE);
2860 base_fsp = NULL;
2861 }
2862 return status;
2863 }
2864
2865 NTSTATUS create_file(connection_struct *conn,
2866 struct smb_request *req,
2867 uint16_t root_dir_fid,
2868 const char *fname,
2869 uint32_t access_mask,
2870 uint32_t share_access,
2871 uint32_t create_disposition,
2872 uint32_t create_options,
2873 uint32_t file_attributes,
2874 uint32_t oplock_request,
2875 uint64_t allocation_size,
2876 struct security_descriptor *sd,
2877 struct ea_list *ea_list,
2878
2879 files_struct **result,
2880 int *pinfo,
2881 SMB_STRUCT_STAT *psbuf)
2882 {
2883 struct case_semantics_state *case_state = NULL;
2884 SMB_STRUCT_STAT sbuf;
2885 int info = FILE_WAS_OPENED;
2886 files_struct *fsp = NULL;
2887 NTSTATUS status;
2888
2889 DEBUG(10,("create_file: access_mask = 0x%x "
2890 "file_attributes = 0x%x, share_access = 0x%x, "
2891 "create_disposition = 0x%x create_options = 0x%x "
2892 "oplock_request = 0x%x "
2893 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
2894 "fname = %s\n",
2895 (unsigned int)access_mask,
2896 (unsigned int)file_attributes,
2897 (unsigned int)share_access,
2898 (unsigned int)create_disposition,
2899 (unsigned int)create_options,
2900 (unsigned int)oplock_request,
2901 (unsigned int)root_dir_fid,
2902 ea_list, sd, fname));
2903
2904 /*
2905 * Get the file name.
2906 */
2907
2908 if (root_dir_fid != 0) {
2909 /*
2910 * This filename is relative to a directory fid.
2911 */
2912 char *parent_fname = NULL;
2913 files_struct *dir_fsp = file_fsp(req, root_dir_fid);
2914
2915 if (dir_fsp == NULL) {
2916 status = NT_STATUS_INVALID_HANDLE;
2917 goto fail;
2918 }
2919
2920 if (!dir_fsp->is_directory) {
2921
2922 /*
2923 * Check to see if this is a mac fork of some kind.
2924 */
2925
2926 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2927 is_ntfs_stream_name(fname)) {
2928 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
2929 goto fail;
2930 }
2931
2932 /*
2933 we need to handle the case when we get a
2934 relative open relative to a file and the
2935 pathname is blank - this is a reopen!
2936 (hint from demyn plantenberg)
2937 */
2938
2939 status = NT_STATUS_INVALID_HANDLE;
2940 goto fail;
2941 }
2942
2943 if (ISDOT(dir_fsp->fsp_name)) {
2944 /*
2945 * We're at the toplevel dir, the final file name
2946 * must not contain ./, as this is filtered out
2947 * normally by srvstr_get_path and unix_convert
2948 * explicitly rejects paths containing ./.
2949 */
2950 parent_fname = talloc_strdup(talloc_tos(), "");
2951 if (parent_fname == NULL) {
2952 status = NT_STATUS_NO_MEMORY;
2953 goto fail;
2954 }
2955 } else {
2956 size_t dir_name_len = strlen(dir_fsp->fsp_name);
2957
2958 /*
2959 * Copy in the base directory name.
2960 */
2961
2962 parent_fname = TALLOC_ARRAY(talloc_tos(), char,
2963 dir_name_len+2);
2964 if (parent_fname == NULL) {
2965 status = NT_STATUS_NO_MEMORY;
2966 goto fail;
2967 }
2968 memcpy(parent_fname, dir_fsp->fsp_name,
2969 dir_name_len+1);
2970
2971 /*
2972 * Ensure it ends in a '/'.
2973 * We used TALLOC_SIZE +2 to add space for the '/'.
2974 */
2975
2976 if(dir_name_len
2977 && (parent_fname[dir_name_len-1] != '\\')
2978 && (parent_fname[dir_name_len-1] != '/')) {
2979 parent_fname[dir_name_len] = '/';
2980 parent_fname[dir_name_len+1] = '\0';
2981 }
2982 }
2983
2984 fname = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
2985 fname);
2986 if (fname == NULL) {
2987 status = NT_STATUS_NO_MEMORY;
2988 goto fail;
2989 }
2990 }
2991
2992 /*
2993 * Check to see if this is a mac fork of some kind.
2994 */
2995
2996 if (is_ntfs_stream_name(fname)) {
2997 enum FAKE_FILE_TYPE fake_file_type;
2998
2999 fake_file_type = is_fake_file(fname);
3000
3001 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3002
3003 /*
3004 * Here we go! support for changing the disk quotas
3005 * --metze
3006 *
3007 * We need to fake up to open this MAGIC QUOTA file
3008 * and return a valid FID.
3009 *
3010 * w2k close this file directly after openening xp
3011 * also tries a QUERY_FILE_INFO on the file and then
3012 * close it
3013 */
3014 status = open_fake_file(req, conn, req->vuid,
3015 fake_file_type, fname,
3016 access_mask, &fsp);
3017 if (!NT_STATUS_IS_OK(status)) {
3018 goto fail;
3019 }
3020
3021 ZERO_STRUCT(sbuf);
3022 goto done;
3023 }
3024
3025 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3026 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3027 goto fail;
3028 }
3029 }
3030
3031 if ((req != NULL) && (req->flags2 & FLAGS2_DFS_PATHNAMES)) {
3032 char *resolved_fname;
3033
3034 status = resolve_dfspath(talloc_tos(), conn, true, fname,
3035 &resolved_fname);
3036
3037 if (!NT_STATUS_IS_OK(status)) {
3038 /*
3039 * For PATH_NOT_COVERED we had
3040 * reply_botherror(req, NT_STATUS_PATH_NOT_COVERED,
3041 * ERRSRV, ERRbadpath);
3042 * Need to fix in callers
3043 */
3044 goto fail;
3045 }
3046 fname = resolved_fname;
3047 }
3048
3049 /*
3050 * Check if POSIX semantics are wanted.
3051 */
3052
3053 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3054 case_state = set_posix_case_semantics(talloc_tos(), conn);
3055 file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
3056 }
3057
3058 {
3059 char *converted_fname;
3060
3061 SET_STAT_INVALID(sbuf);
3062
3063 status = unix_convert(talloc_tos(), conn, fname, False,
3064 &converted_fname, NULL, &sbuf);
3065 if (!NT_STATUS_IS_OK(status)) {
3066 goto fail;
3067 }
3068 fname = converted_fname;
3069 }
3070
3071 TALLOC_FREE(case_state);
3072
3073 /* All file access must go through check_name() */
3074
3075 status = check_name(conn, fname);
3076 if (!NT_STATUS_IS_OK(status)) {
3077 goto fail;
3078 }
3079
3080 status = create_file_unixpath(
3081 conn, req, fname, access_mask, share_access,
3082 create_disposition, create_options, file_attributes,
3083 oplock_request, allocation_size, sd, ea_list,
3084 &fsp, &info, &sbuf);
3085
3086 if (!NT_STATUS_IS_OK(status)) {
3087 goto fail;
3088 }
3089
3090 done:
3091 DEBUG(10, ("create_file: info=%d\n", info));
3092
3093 *result = fsp;
3094 if (pinfo != NULL) {
3095 *pinfo = info;
3096 }
3097 if (psbuf != NULL) {
3098 *psbuf = sbuf;
3099 }
3100 return NT_STATUS_OK;
3101
3102 fail:
3103 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3104
3105 if (fsp != NULL) {
3106 close_file(req, fsp, ERROR_CLOSE);
3107 fsp = NULL;
3108 }
3109 return status;
3110 }