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s3-security: use shared SECINFO_SACL define.
[Samba/ekacnet.git] / source3 / smbd / open.c
blobf6905eaaa108ff6841f10eb2a3b11b07ece93772
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 #include "smbd/globals.h"
24 #include "librpc/gen_ndr/messaging.h"
25 #include "../librpc/gen_ndr/ndr_security.h"
26
27 extern const struct generic_mapping file_generic_mapping;
28
29 struct deferred_open_record {
30 bool delayed_for_oplocks;
31 struct file_id id;
32 };
33
34 static NTSTATUS create_file_unixpath(connection_struct *conn,
35 struct smb_request *req,
36 struct smb_filename *smb_fname,
37 uint32_t access_mask,
38 uint32_t share_access,
39 uint32_t create_disposition,
40 uint32_t create_options,
41 uint32_t file_attributes,
42 uint32_t oplock_request,
43 uint64_t allocation_size,
44 uint32_t private_flags,
45 struct security_descriptor *sd,
46 struct ea_list *ea_list,
47
48 files_struct **result,
49 int *pinfo);
50
51 /****************************************************************************
52 SMB1 file varient of se_access_check. Never test FILE_READ_ATTRIBUTES.
53 ****************************************************************************/
54
55 NTSTATUS smb1_file_se_access_check(struct connection_struct *conn,
56 const struct security_descriptor *sd,
57 const NT_USER_TOKEN *token,
58 uint32_t access_desired,
59 uint32_t *access_granted)
60 {
61 *access_granted = 0;
62
63 if (get_current_uid(conn) == (uid_t)0) {
64 /* I'm sorry sir, I didn't know you were root... */
65 *access_granted = access_desired;
66 if (access_desired & SEC_FLAG_MAXIMUM_ALLOWED) {
67 *access_granted |= FILE_GENERIC_ALL;
68 }
69 return NT_STATUS_OK;
70 }
71
72 return se_access_check(sd,
73 token,
74 (access_desired & ~FILE_READ_ATTRIBUTES),
75 access_granted);
76 }
77
78 /****************************************************************************
79 Check if we have open rights.
80 ****************************************************************************/
81
82 NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
83 const struct smb_filename *smb_fname,
84 uint32_t access_mask,
85 uint32_t *access_granted)
86 {
87 /* Check if we have rights to open. */
88 NTSTATUS status;
89 struct security_descriptor *sd = NULL;
90
91 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
92 (SECINFO_OWNER |
93 SECINFO_GROUP |
94 DACL_SECURITY_INFORMATION),&sd);
95
96 if (!NT_STATUS_IS_OK(status)) {
97 DEBUG(10, ("smbd_check_open_rights: Could not get acl "
98 "on %s: %s\n",
99 smb_fname_str_dbg(smb_fname),
100 nt_errstr(status)));
101 return status;
102 }
103
104 status = smb1_file_se_access_check(conn,
105 sd,
106 get_current_nttok(conn),
107 access_mask,
108 access_granted);
109
110 DEBUG(10,("smbd_check_open_rights: file %s requesting "
111 "0x%x returning 0x%x (%s)\n",
112 smb_fname_str_dbg(smb_fname),
113 (unsigned int)access_mask,
114 (unsigned int)*access_granted,
115 nt_errstr(status) ));
116
117 if (!NT_STATUS_IS_OK(status)) {
118 if (DEBUGLEVEL >= 10) {
119 DEBUG(10,("smbd_check_open_rights: acl for %s is:\n",
120 smb_fname_str_dbg(smb_fname) ));
121 NDR_PRINT_DEBUG(security_descriptor, sd);
122 }
123 }
124
125 TALLOC_FREE(sd);
126
127 return status;
128 }
129
130 /****************************************************************************
131 fd support routines - attempt to do a dos_open.
132 ****************************************************************************/
133
134 static NTSTATUS fd_open(struct connection_struct *conn,
135 files_struct *fsp,
136 int flags,
137 mode_t mode)
138 {
139 struct smb_filename *smb_fname = fsp->fsp_name;
140 NTSTATUS status = NT_STATUS_OK;
141
142 #ifdef O_NOFOLLOW
143 /*
144 * Never follow symlinks on a POSIX client. The
145 * client should be doing this.
146 */
147
148 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
149 flags |= O_NOFOLLOW;
150 }
151 #endif
152
153 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
154 if (fsp->fh->fd == -1) {
155 status = map_nt_error_from_unix(errno);
156 if (errno == EMFILE) {
157 static time_t last_warned = 0L;
158
159 if (time((time_t *) NULL) > last_warned) {
160 DEBUG(0,("Too many open files, unable "
161 "to open more! smbd's max "
162 "open files = %d\n",
163 lp_max_open_files()));
164 last_warned = time((time_t *) NULL);
165 }
166 }
167
168 }
169
170 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
171 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
172 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
173
174 return status;
175 }
176
177 /****************************************************************************
178 Close the file associated with a fsp.
179 ****************************************************************************/
180
181 NTSTATUS fd_close(files_struct *fsp)
182 {
183 int ret;
184
185 if (fsp->fh->fd == -1) {
186 return NT_STATUS_OK; /* What we used to call a stat open. */
187 }
188 if (fsp->fh->ref_count > 1) {
189 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
190 }
191
192 ret = SMB_VFS_CLOSE(fsp);
193 fsp->fh->fd = -1;
194 if (ret == -1) {
195 return map_nt_error_from_unix(errno);
196 }
197 return NT_STATUS_OK;
198 }
199
200 /****************************************************************************
201 Change the ownership of a file to that of the parent directory.
202 Do this by fd if possible.
203 ****************************************************************************/
204
205 void change_file_owner_to_parent(connection_struct *conn,
206 const char *inherit_from_dir,
207 files_struct *fsp)
208 {
209 struct smb_filename *smb_fname_parent = NULL;
210 NTSTATUS status;
211 int ret;
212
213 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
214 NULL, NULL, &smb_fname_parent);
215 if (!NT_STATUS_IS_OK(status)) {
216 return;
217 }
218
219 ret = SMB_VFS_STAT(conn, smb_fname_parent);
220 if (ret == -1) {
221 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
222 "directory %s. Error was %s\n",
223 smb_fname_str_dbg(smb_fname_parent),
224 strerror(errno)));
225 return;
226 }
227
228 become_root();
229 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
230 unbecome_root();
231 if (ret == -1) {
232 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
233 "file %s to parent directory uid %u. Error "
234 "was %s\n", fsp_str_dbg(fsp),
235 (unsigned int)smb_fname_parent->st.st_ex_uid,
236 strerror(errno) ));
237 }
238
239 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
240 "parent directory uid %u.\n", fsp_str_dbg(fsp),
241 (unsigned int)smb_fname_parent->st.st_ex_uid));
242
243 TALLOC_FREE(smb_fname_parent);
244 }
245
246 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
247 const char *inherit_from_dir,
248 const char *fname,
249 SMB_STRUCT_STAT *psbuf)
250 {
251 struct smb_filename *smb_fname_parent = NULL;
252 struct smb_filename *smb_fname_cwd = NULL;
253 char *saved_dir = NULL;
254 TALLOC_CTX *ctx = talloc_tos();
255 NTSTATUS status = NT_STATUS_OK;
256 int ret;
257
258 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
259 &smb_fname_parent);
260 if (!NT_STATUS_IS_OK(status)) {
261 return status;
262 }
263
264 ret = SMB_VFS_STAT(conn, smb_fname_parent);
265 if (ret == -1) {
266 status = map_nt_error_from_unix(errno);
267 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
268 "directory %s. Error was %s\n",
269 smb_fname_str_dbg(smb_fname_parent),
270 strerror(errno)));
271 goto out;
272 }
273
274 /* We've already done an lstat into psbuf, and we know it's a
275 directory. If we can cd into the directory and the dev/ino
276 are the same then we can safely chown without races as
277 we're locking the directory in place by being in it. This
278 should work on any UNIX (thanks tridge :-). JRA.
279 */
280
281 saved_dir = vfs_GetWd(ctx,conn);
282 if (!saved_dir) {
283 status = map_nt_error_from_unix(errno);
284 DEBUG(0,("change_dir_owner_to_parent: failed to get "
285 "current working directory. Error was %s\n",
286 strerror(errno)));
287 goto out;
288 }
289
290 /* Chdir into the new path. */
291 if (vfs_ChDir(conn, fname) == -1) {
292 status = map_nt_error_from_unix(errno);
293 DEBUG(0,("change_dir_owner_to_parent: failed to change "
294 "current working directory to %s. Error "
295 "was %s\n", fname, strerror(errno) ));
296 goto chdir;
297 }
298
299 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
300 &smb_fname_cwd);
301 if (!NT_STATUS_IS_OK(status)) {
302 return status;
303 }
304
305 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
306 if (ret == -1) {
307 status = map_nt_error_from_unix(errno);
308 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
309 "directory '.' (%s) Error was %s\n",
310 fname, strerror(errno)));
311 goto chdir;
312 }
313
314 /* Ensure we're pointing at the same place. */
315 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
316 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino ||
317 smb_fname_cwd->st.st_ex_mode != psbuf->st_ex_mode ) {
318 DEBUG(0,("change_dir_owner_to_parent: "
319 "device/inode/mode on directory %s changed. "
320 "Refusing to chown !\n", fname ));
321 status = NT_STATUS_ACCESS_DENIED;
322 goto chdir;
323 }
324
325 become_root();
326 ret = SMB_VFS_CHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
327 (gid_t)-1);
328 unbecome_root();
329 if (ret == -1) {
330 status = map_nt_error_from_unix(errno);
331 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
332 "directory %s to parent directory uid %u. "
333 "Error was %s\n", fname,
334 (unsigned int)smb_fname_parent->st.st_ex_uid,
335 strerror(errno) ));
336 goto chdir;
337 }
338
339 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
340 "directory %s to parent directory uid %u.\n",
341 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
342
343 chdir:
344 vfs_ChDir(conn,saved_dir);
345 out:
346 TALLOC_FREE(smb_fname_parent);
347 TALLOC_FREE(smb_fname_cwd);
348 return status;
349 }
350
351 /****************************************************************************
352 Open a file.
353 ****************************************************************************/
354
355 static NTSTATUS open_file(files_struct *fsp,
356 connection_struct *conn,
357 struct smb_request *req,
358 const char *parent_dir,
359 int flags,
360 mode_t unx_mode,
361 uint32 access_mask, /* client requested access mask. */
362 uint32 open_access_mask) /* what we're actually using in the open. */
363 {
364 struct smb_filename *smb_fname = fsp->fsp_name;
365 NTSTATUS status = NT_STATUS_OK;
366 int accmode = (flags & O_ACCMODE);
367 int local_flags = flags;
368 bool file_existed = VALID_STAT(fsp->fsp_name->st);
369
370 fsp->fh->fd = -1;
371 errno = EPERM;
372
373 /* Check permissions */
374
375 /*
376 * This code was changed after seeing a client open request
377 * containing the open mode of (DENY_WRITE/read-only) with
378 * the 'create if not exist' bit set. The previous code
379 * would fail to open the file read only on a read-only share
380 * as it was checking the flags parameter directly against O_RDONLY,
381 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
382 * JRA.
383 */
384
385 if (!CAN_WRITE(conn)) {
386 /* It's a read-only share - fail if we wanted to write. */
387 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
388 DEBUG(3,("Permission denied opening %s\n",
389 smb_fname_str_dbg(smb_fname)));
390 return NT_STATUS_ACCESS_DENIED;
391 } else if(flags & O_CREAT) {
392 /* We don't want to write - but we must make sure that
393 O_CREAT doesn't create the file if we have write
394 access into the directory.
395 */
396 flags &= ~(O_CREAT|O_EXCL);
397 local_flags &= ~(O_CREAT|O_EXCL);
398 }
399 }
400
401 /*
402 * This little piece of insanity is inspired by the
403 * fact that an NT client can open a file for O_RDONLY,
404 * but set the create disposition to FILE_EXISTS_TRUNCATE.
405 * If the client *can* write to the file, then it expects to
406 * truncate the file, even though it is opening for readonly.
407 * Quicken uses this stupid trick in backup file creation...
408 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
409 * for helping track this one down. It didn't bite us in 2.0.x
410 * as we always opened files read-write in that release. JRA.
411 */
412
413 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
414 DEBUG(10,("open_file: truncate requested on read-only open "
415 "for file %s\n", smb_fname_str_dbg(smb_fname)));
416 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
417 }
418
419 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
420 (!file_existed && (local_flags & O_CREAT)) ||
421 ((local_flags & O_TRUNC) == O_TRUNC) ) {
422 const char *wild;
423
424 /*
425 * We can't actually truncate here as the file may be locked.
426 * open_file_ntcreate will take care of the truncate later. JRA.
427 */
428
429 local_flags &= ~O_TRUNC;
430
431 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
432 /*
433 * We would block on opening a FIFO with no one else on the
434 * other end. Do what we used to do and add O_NONBLOCK to the
435 * open flags. JRA.
436 */
437
438 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
439 local_flags |= O_NONBLOCK;
440 }
441 #endif
442
443 /* Don't create files with Microsoft wildcard characters. */
444 if (fsp->base_fsp) {
445 /*
446 * wildcard characters are allowed in stream names
447 * only test the basefilename
448 */
449 wild = fsp->base_fsp->fsp_name->base_name;
450 } else {
451 wild = smb_fname->base_name;
452 }
453 if ((local_flags & O_CREAT) && !file_existed &&
454 ms_has_wild(wild)) {
455 return NT_STATUS_OBJECT_NAME_INVALID;
456 }
457
458 /* Actually do the open */
459 status = fd_open(conn, fsp, local_flags, unx_mode);
460 if (!NT_STATUS_IS_OK(status)) {
461 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
462 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
463 nt_errstr(status),local_flags,flags));
464 return status;
465 }
466
467 if ((local_flags & O_CREAT) && !file_existed) {
468
469 /* Inherit the ACL if required */
470 if (lp_inherit_perms(SNUM(conn))) {
471 inherit_access_posix_acl(conn, parent_dir,
472 smb_fname->base_name,
473 unx_mode);
474 }
475
476 /* Change the owner if required. */
477 if (lp_inherit_owner(SNUM(conn))) {
478 change_file_owner_to_parent(conn, parent_dir,
479 fsp);
480 }
481
482 notify_fname(conn, NOTIFY_ACTION_ADDED,
483 FILE_NOTIFY_CHANGE_FILE_NAME,
484 smb_fname->base_name);
485 }
486
487 } else {
488 fsp->fh->fd = -1; /* What we used to call a stat open. */
489 if (file_existed) {
490 uint32_t access_granted = 0;
491
492 status = smbd_check_open_rights(conn,
493 smb_fname,
494 access_mask,
495 &access_granted);
496 if (!NT_STATUS_IS_OK(status)) {
497 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
498 /*
499 * On NT_STATUS_ACCESS_DENIED, access_granted
500 * contains the denied bits.
501 */
502
503 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
504 (access_granted & FILE_WRITE_ATTRIBUTES) &&
505 (lp_map_readonly(SNUM(conn)) ||
506 lp_map_archive(SNUM(conn)) ||
507 lp_map_hidden(SNUM(conn)) ||
508 lp_map_system(SNUM(conn)))) {
509 access_granted &= ~FILE_WRITE_ATTRIBUTES;
510
511 DEBUG(10,("open_file: "
512 "overrode "
513 "FILE_WRITE_"
514 "ATTRIBUTES "
515 "on file %s\n",
516 smb_fname_str_dbg(
517 smb_fname)));
518 }
519
520 if ((access_mask & DELETE_ACCESS) &&
521 (access_granted & DELETE_ACCESS) &&
522 can_delete_file_in_directory(conn,
523 smb_fname)) {
524 /* Were we trying to do a stat open
525 * for delete and didn't get DELETE
526 * access (only) ? Check if the
527 * directory allows DELETE_CHILD.
528 * See here:
529 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
530 * for details. */
531
532 access_granted &= ~DELETE_ACCESS;
533
534 DEBUG(10,("open_file: "
535 "overrode "
536 "DELETE_ACCESS on "
537 "file %s\n",
538 smb_fname_str_dbg(
539 smb_fname)));
540 }
541
542 if (access_granted != 0) {
543 DEBUG(10,("open_file: Access "
544 "denied on file "
545 "%s\n",
546 smb_fname_str_dbg(
547 smb_fname)));
548 return status;
549 }
550 } else if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
551 fsp->posix_open &&
552 S_ISLNK(smb_fname->st.st_ex_mode)) {
553 /* This is a POSIX stat open for delete
554 * or rename on a symlink that points
555 * nowhere. Allow. */
556 DEBUG(10,("open_file: allowing POSIX "
557 "open on bad symlink %s\n",
558 smb_fname_str_dbg(
559 smb_fname)));
560 } else {
561 DEBUG(10,("open_file: "
562 "smbd_check_open_rights on file "
563 "%s returned %s\n",
564 smb_fname_str_dbg(smb_fname),
565 nt_errstr(status) ));
566 return status;
567 }
568 }
569 }
570 }
571
572 if (!file_existed) {
573 int ret;
574
575 if (fsp->fh->fd == -1) {
576 ret = SMB_VFS_STAT(conn, smb_fname);
577 } else {
578 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
579 /* If we have an fd, this stat should succeed. */
580 if (ret == -1) {
581 DEBUG(0,("Error doing fstat on open file %s "
582 "(%s)\n",
583 smb_fname_str_dbg(smb_fname),
584 strerror(errno) ));
585 }
586 }
587
588 /* For a non-io open, this stat failing means file not found. JRA */
589 if (ret == -1) {
590 status = map_nt_error_from_unix(errno);
591 fd_close(fsp);
592 return status;
593 }
594 }
595
596 /*
597 * POSIX allows read-only opens of directories. We don't
598 * want to do this (we use a different code path for this)
599 * so catch a directory open and return an EISDIR. JRA.
600 */
601
602 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
603 fd_close(fsp);
604 errno = EISDIR;
605 return NT_STATUS_FILE_IS_A_DIRECTORY;
606 }
607
608 fsp->mode = smb_fname->st.st_ex_mode;
609 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
610 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
611 fsp->file_pid = req ? req->smbpid : 0;
612 fsp->can_lock = True;
613 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
614 if (!CAN_WRITE(conn)) {
615 fsp->can_write = False;
616 } else {
617 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
618 True : False;
619 }
620 fsp->print_file = NULL;
621 fsp->modified = False;
622 fsp->sent_oplock_break = NO_BREAK_SENT;
623 fsp->is_directory = False;
624 if (conn->aio_write_behind_list &&
625 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
626 conn->case_sensitive)) {
627 fsp->aio_write_behind = True;
628 }
629
630 fsp->wcp = NULL; /* Write cache pointer. */
631
632 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
633 conn->server_info->unix_name,
634 smb_fname_str_dbg(smb_fname),
635 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
636 conn->num_files_open));
637
638 errno = 0;
639 return NT_STATUS_OK;
640 }
641
642 /*******************************************************************
643 Return True if the filename is one of the special executable types.
644 ********************************************************************/
645
646 bool is_executable(const char *fname)
647 {
648 if ((fname = strrchr_m(fname,'.'))) {
649 if (strequal(fname,".com") ||
650 strequal(fname,".dll") ||
651 strequal(fname,".exe") ||
652 strequal(fname,".sym")) {
653 return True;
654 }
655 }
656 return False;
657 }
658
659 /****************************************************************************
660 Check if we can open a file with a share mode.
661 Returns True if conflict, False if not.
662 ****************************************************************************/
663
664 static bool share_conflict(struct share_mode_entry *entry,
665 uint32 access_mask,
666 uint32 share_access)
667 {
668 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
669 "entry->share_access = 0x%x, "
670 "entry->private_options = 0x%x\n",
671 (unsigned int)entry->access_mask,
672 (unsigned int)entry->share_access,
673 (unsigned int)entry->private_options));
674
675 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
676 (unsigned int)access_mask, (unsigned int)share_access));
677
678 if ((entry->access_mask & (FILE_WRITE_DATA|
679 FILE_APPEND_DATA|
680 FILE_READ_DATA|
681 FILE_EXECUTE|
682 DELETE_ACCESS)) == 0) {
683 DEBUG(10,("share_conflict: No conflict due to "
684 "entry->access_mask = 0x%x\n",
685 (unsigned int)entry->access_mask ));
686 return False;
687 }
688
689 if ((access_mask & (FILE_WRITE_DATA|
690 FILE_APPEND_DATA|
691 FILE_READ_DATA|
692 FILE_EXECUTE|
693 DELETE_ACCESS)) == 0) {
694 DEBUG(10,("share_conflict: No conflict due to "
695 "access_mask = 0x%x\n",
696 (unsigned int)access_mask ));
697 return False;
698 }
699
700 #if 1 /* JRA TEST - Superdebug. */
701 #define CHECK_MASK(num, am, right, sa, share) \
702 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
703 (unsigned int)(num), (unsigned int)(am), \
704 (unsigned int)(right), (unsigned int)(am)&(right) )); \
705 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
706 (unsigned int)(num), (unsigned int)(sa), \
707 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
708 if (((am) & (right)) && !((sa) & (share))) { \
709 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
710 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
711 (unsigned int)(share) )); \
712 return True; \
713 }
714 #else
715 #define CHECK_MASK(num, am, right, sa, share) \
716 if (((am) & (right)) && !((sa) & (share))) { \
717 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
718 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
719 (unsigned int)(share) )); \
720 return True; \
721 }
722 #endif
723
724 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
725 share_access, FILE_SHARE_WRITE);
726 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
727 entry->share_access, FILE_SHARE_WRITE);
728
729 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
730 share_access, FILE_SHARE_READ);
731 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
732 entry->share_access, FILE_SHARE_READ);
733
734 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
735 share_access, FILE_SHARE_DELETE);
736 CHECK_MASK(6, access_mask, DELETE_ACCESS,
737 entry->share_access, FILE_SHARE_DELETE);
738
739 DEBUG(10,("share_conflict: No conflict.\n"));
740 return False;
741 }
742
743 #if defined(DEVELOPER)
744 static void validate_my_share_entries(int num,
745 struct share_mode_entry *share_entry)
746 {
747 files_struct *fsp;
748
749 if (!procid_is_me(&share_entry->pid)) {
750 return;
751 }
752
753 if (is_deferred_open_entry(share_entry) &&
754 !open_was_deferred(share_entry->op_mid)) {
755 char *str = talloc_asprintf(talloc_tos(),
756 "Got a deferred entry without a request: "
757 "PANIC: %s\n",
758 share_mode_str(talloc_tos(), num, share_entry));
759 smb_panic(str);
760 }
761
762 if (!is_valid_share_mode_entry(share_entry)) {
763 return;
764 }
765
766 fsp = file_find_dif(share_entry->id,
767 share_entry->share_file_id);
768 if (!fsp) {
769 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
770 share_mode_str(talloc_tos(), num, share_entry) ));
771 smb_panic("validate_my_share_entries: Cannot match a "
772 "share entry with an open file\n");
773 }
774
775 if (is_deferred_open_entry(share_entry) ||
776 is_unused_share_mode_entry(share_entry)) {
777 goto panic;
778 }
779
780 if ((share_entry->op_type == NO_OPLOCK) &&
781 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
782 /* Someone has already written to it, but I haven't yet
783 * noticed */
784 return;
785 }
786
787 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
788 goto panic;
789 }
790
791 return;
792
793 panic:
794 {
795 char *str;
796 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
797 share_mode_str(talloc_tos(), num, share_entry) ));
798 str = talloc_asprintf(talloc_tos(),
799 "validate_my_share_entries: "
800 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
801 fsp->fsp_name->base_name,
802 (unsigned int)fsp->oplock_type,
803 (unsigned int)share_entry->op_type );
804 smb_panic(str);
805 }
806 }
807 #endif
808
809 bool is_stat_open(uint32 access_mask)
810 {
811 return (access_mask &&
812 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
813 FILE_WRITE_ATTRIBUTES))==0) &&
814 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
815 FILE_WRITE_ATTRIBUTES)) != 0));
816 }
817
818 /****************************************************************************
819 Deal with share modes
820 Invarient: Share mode must be locked on entry and exit.
821 Returns -1 on error, or number of share modes on success (may be zero).
822 ****************************************************************************/
823
824 static NTSTATUS open_mode_check(connection_struct *conn,
825 struct share_mode_lock *lck,
826 uint32 access_mask,
827 uint32 share_access,
828 uint32 create_options,
829 bool *file_existed)
830 {
831 int i;
832
833 if(lck->num_share_modes == 0) {
834 return NT_STATUS_OK;
835 }
836
837 *file_existed = True;
838
839 /* A delete on close prohibits everything */
840
841 if (lck->delete_on_close) {
842 return NT_STATUS_DELETE_PENDING;
843 }
844
845 if (is_stat_open(access_mask)) {
846 /* Stat open that doesn't trigger oplock breaks or share mode
847 * checks... ! JRA. */
848 return NT_STATUS_OK;
849 }
850
851 /*
852 * Check if the share modes will give us access.
853 */
854
855 #if defined(DEVELOPER)
856 for(i = 0; i < lck->num_share_modes; i++) {
857 validate_my_share_entries(i, &lck->share_modes[i]);
858 }
859 #endif
860
861 if (!lp_share_modes(SNUM(conn))) {
862 return NT_STATUS_OK;
863 }
864
865 /* Now we check the share modes, after any oplock breaks. */
866 for(i = 0; i < lck->num_share_modes; i++) {
867
868 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
869 continue;
870 }
871
872 /* someone else has a share lock on it, check to see if we can
873 * too */
874 if (share_conflict(&lck->share_modes[i],
875 access_mask, share_access)) {
876 return NT_STATUS_SHARING_VIOLATION;
877 }
878 }
879
880 return NT_STATUS_OK;
881 }
882
883 static bool is_delete_request(files_struct *fsp) {
884 return ((fsp->access_mask == DELETE_ACCESS) &&
885 (fsp->oplock_type == NO_OPLOCK));
886 }
887
888 /*
889 * Send a break message to the oplock holder and delay the open for
890 * our client.
891 */
892
893 static NTSTATUS send_break_message(files_struct *fsp,
894 struct share_mode_entry *exclusive,
895 uint64_t mid,
896 int oplock_request)
897 {
898 NTSTATUS status;
899 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
900
901 DEBUG(10, ("Sending break request to PID %s\n",
902 procid_str_static(&exclusive->pid)));
903 exclusive->op_mid = mid;
904
905 /* Create the message. */
906 share_mode_entry_to_message(msg, exclusive);
907
908 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
909 don't want this set in the share mode struct pointed to by lck. */
910
911 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
912 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
913 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
914 }
915
916 status = messaging_send_buf(smbd_messaging_context(), exclusive->pid,
917 MSG_SMB_BREAK_REQUEST,
918 (uint8 *)msg,
919 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
920 if (!NT_STATUS_IS_OK(status)) {
921 DEBUG(3, ("Could not send oplock break message: %s\n",
922 nt_errstr(status)));
923 }
924
925 return status;
926 }
927
928 /*
929 * 1) No files open at all or internal open: Grant whatever the client wants.
930 *
931 * 2) Exclusive (or batch) oplock around: If the requested access is a delete
932 * request, break if the oplock around is a batch oplock. If it's another
933 * requested access type, break.
934 *
935 * 3) Only level2 around: Grant level2 and do nothing else.
936 */
937
938 static bool delay_for_oplocks(struct share_mode_lock *lck,
939 files_struct *fsp,
940 uint64_t mid,
941 int pass_number,
942 int oplock_request)
943 {
944 int i;
945 struct share_mode_entry *exclusive = NULL;
946 bool valid_entry = false;
947 bool have_level2 = false;
948 bool have_a_none_oplock = false;
949 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
950 lp_level2_oplocks(SNUM(fsp->conn));
951
952 if (oplock_request & INTERNAL_OPEN_ONLY) {
953 fsp->oplock_type = NO_OPLOCK;
954 }
955
956 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
957 return false;
958 }
959
960 for (i=0; i<lck->num_share_modes; i++) {
961
962 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
963 continue;
964 }
965
966 /* At least one entry is not an invalid or deferred entry. */
967 valid_entry = true;
968
969 if (pass_number == 1) {
970 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
971 SMB_ASSERT(exclusive == NULL);
972 exclusive = &lck->share_modes[i];
973 }
974 } else {
975 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
976 SMB_ASSERT(exclusive == NULL);
977 exclusive = &lck->share_modes[i];
978 }
979 }
980
981 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
982 SMB_ASSERT(exclusive == NULL);
983 have_level2 = true;
984 }
985
986 if (lck->share_modes[i].op_type == NO_OPLOCK) {
987 have_a_none_oplock = true;
988 }
989 }
990
991 if (exclusive != NULL) { /* Found an exclusive oplock */
992 bool delay_it = is_delete_request(fsp) ?
993 BATCH_OPLOCK_TYPE(exclusive->op_type) : true;
994 SMB_ASSERT(!have_level2);
995 if (delay_it) {
996 send_break_message(fsp, exclusive, mid, oplock_request);
997 return true;
998 }
999 }
1000
1001 /*
1002 * Match what was requested (fsp->oplock_type) with
1003 * what was found in the existing share modes.
1004 */
1005
1006 if (!valid_entry) {
1007 /* All entries are placeholders or deferred.
1008 * Directly grant whatever the client wants. */
1009 if (fsp->oplock_type == NO_OPLOCK) {
1010 /* Store a level2 oplock, but don't tell the client */
1011 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1012 }
1013 } else if (have_a_none_oplock) {
1014 fsp->oplock_type = NO_OPLOCK;
1015 } else if (have_level2) {
1016 if (fsp->oplock_type == NO_OPLOCK ||
1017 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1018 /* Store a level2 oplock, but don't tell the client */
1019 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1020 } else {
1021 fsp->oplock_type = LEVEL_II_OPLOCK;
1022 }
1023 } else {
1024 /* This case can never happen. */
1025 SMB_ASSERT(1);
1026 }
1027
1028 /*
1029 * Don't grant level2 to clients that don't want them
1030 * or if we've turned them off.
1031 */
1032 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1033 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1034 }
1035
1036 DEBUG(10,("delay_for_oplocks: oplock type 0x%x on file %s\n",
1037 fsp->oplock_type, fsp_str_dbg(fsp)));
1038
1039 /* No delay. */
1040 return false;
1041 }
1042
1043 bool request_timed_out(struct timeval request_time,
1044 struct timeval timeout)
1045 {
1046 struct timeval now, end_time;
1047 GetTimeOfDay(&now);
1048 end_time = timeval_sum(&request_time, &timeout);
1049 return (timeval_compare(&end_time, &now) < 0);
1050 }
1051
1052 /****************************************************************************
1053 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1054 ****************************************************************************/
1055
1056 static void defer_open(struct share_mode_lock *lck,
1057 struct timeval request_time,
1058 struct timeval timeout,
1059 struct smb_request *req,
1060 struct deferred_open_record *state)
1061 {
1062 int i;
1063
1064 /* Paranoia check */
1065
1066 for (i=0; i<lck->num_share_modes; i++) {
1067 struct share_mode_entry *e = &lck->share_modes[i];
1068
1069 if (!is_deferred_open_entry(e)) {
1070 continue;
1071 }
1072
1073 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1074 DEBUG(0, ("Trying to defer an already deferred "
1075 "request: mid=%llu, exiting\n",
1076 (unsigned long long)req->mid));
1077 exit_server("attempt to defer a deferred request");
1078 }
1079 }
1080
1081 /* End paranoia check */
1082
1083 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1084 "open entry for mid %llu\n",
1085 (unsigned int)request_time.tv_sec,
1086 (unsigned int)request_time.tv_usec,
1087 (unsigned long long)req->mid));
1088
1089 if (!push_deferred_open_message_smb(req, request_time, timeout,
1090 state->id, (char *)state, sizeof(*state))) {
1091 exit_server("push_deferred_open_message_smb failed");
1092 }
1093 add_deferred_open(lck, req->mid, request_time, state->id);
1094 }
1095
1096
1097 /****************************************************************************
1098 On overwrite open ensure that the attributes match.
1099 ****************************************************************************/
1100
1101 bool open_match_attributes(connection_struct *conn,
1102 uint32 old_dos_attr,
1103 uint32 new_dos_attr,
1104 mode_t existing_unx_mode,
1105 mode_t new_unx_mode,
1106 mode_t *returned_unx_mode)
1107 {
1108 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1109
1110 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1111 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1112
1113 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1114 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1115 *returned_unx_mode = new_unx_mode;
1116 } else {
1117 *returned_unx_mode = (mode_t)0;
1118 }
1119
1120 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1121 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1122 "returned_unx_mode = 0%o\n",
1123 (unsigned int)old_dos_attr,
1124 (unsigned int)existing_unx_mode,
1125 (unsigned int)new_dos_attr,
1126 (unsigned int)*returned_unx_mode ));
1127
1128 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1129 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1130 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1131 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1132 return False;
1133 }
1134 }
1135 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1136 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1137 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1138 return False;
1139 }
1140 }
1141 return True;
1142 }
1143
1144 /****************************************************************************
1145 Special FCB or DOS processing in the case of a sharing violation.
1146 Try and find a duplicated file handle.
1147 ****************************************************************************/
1148
1149 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1150 connection_struct *conn,
1151 files_struct *fsp_to_dup_into,
1152 const struct smb_filename *smb_fname,
1153 struct file_id id,
1154 uint16 file_pid,
1155 uint16 vuid,
1156 uint32 access_mask,
1157 uint32 share_access,
1158 uint32 create_options)
1159 {
1160 files_struct *fsp;
1161
1162 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1163 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1164
1165 for(fsp = file_find_di_first(id); fsp;
1166 fsp = file_find_di_next(fsp)) {
1167
1168 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1169 "vuid = %u, file_pid = %u, private_options = 0x%x "
1170 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1171 fsp->fh->fd, (unsigned int)fsp->vuid,
1172 (unsigned int)fsp->file_pid,
1173 (unsigned int)fsp->fh->private_options,
1174 (unsigned int)fsp->access_mask ));
1175
1176 if (fsp->fh->fd != -1 &&
1177 fsp->vuid == vuid &&
1178 fsp->file_pid == file_pid &&
1179 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1180 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1181 (fsp->access_mask & FILE_WRITE_DATA) &&
1182 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1183 strequal(fsp->fsp_name->stream_name,
1184 smb_fname->stream_name)) {
1185 DEBUG(10,("fcb_or_dos_open: file match\n"));
1186 break;
1187 }
1188 }
1189
1190 if (!fsp) {
1191 return NT_STATUS_NOT_FOUND;
1192 }
1193
1194 /* quite an insane set of semantics ... */
1195 if (is_executable(smb_fname->base_name) &&
1196 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1197 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1198 return NT_STATUS_INVALID_PARAMETER;
1199 }
1200
1201 /* We need to duplicate this fsp. */
1202 return dup_file_fsp(req, fsp, access_mask, share_access,
1203 create_options, fsp_to_dup_into);
1204 }
1205
1206 /****************************************************************************
1207 Open a file with a share mode - old openX method - map into NTCreate.
1208 ****************************************************************************/
1209
1210 bool map_open_params_to_ntcreate(const struct smb_filename *smb_fname,
1211 int deny_mode, int open_func,
1212 uint32 *paccess_mask,
1213 uint32 *pshare_mode,
1214 uint32 *pcreate_disposition,
1215 uint32 *pcreate_options,
1216 uint32_t *pprivate_flags)
1217 {
1218 uint32 access_mask;
1219 uint32 share_mode;
1220 uint32 create_disposition;
1221 uint32 create_options = FILE_NON_DIRECTORY_FILE;
1222 uint32_t private_flags = 0;
1223
1224 DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
1225 "open_func = 0x%x\n",
1226 smb_fname_str_dbg(smb_fname), (unsigned int)deny_mode,
1227 (unsigned int)open_func ));
1228
1229 /* Create the NT compatible access_mask. */
1230 switch (GET_OPENX_MODE(deny_mode)) {
1231 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
1232 case DOS_OPEN_RDONLY:
1233 access_mask = FILE_GENERIC_READ;
1234 break;
1235 case DOS_OPEN_WRONLY:
1236 access_mask = FILE_GENERIC_WRITE;
1237 break;
1238 case DOS_OPEN_RDWR:
1239 case DOS_OPEN_FCB:
1240 access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
1241 break;
1242 default:
1243 DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
1244 (unsigned int)GET_OPENX_MODE(deny_mode)));
1245 return False;
1246 }
1247
1248 /* Create the NT compatible create_disposition. */
1249 switch (open_func) {
1250 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
1251 create_disposition = FILE_CREATE;
1252 break;
1253
1254 case OPENX_FILE_EXISTS_OPEN:
1255 create_disposition = FILE_OPEN;
1256 break;
1257
1258 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
1259 create_disposition = FILE_OPEN_IF;
1260 break;
1261
1262 case OPENX_FILE_EXISTS_TRUNCATE:
1263 create_disposition = FILE_OVERWRITE;
1264 break;
1265
1266 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
1267 create_disposition = FILE_OVERWRITE_IF;
1268 break;
1269
1270 default:
1271 /* From samba4 - to be confirmed. */
1272 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
1273 create_disposition = FILE_CREATE;
1274 break;
1275 }
1276 DEBUG(10,("map_open_params_to_ntcreate: bad "
1277 "open_func 0x%x\n", (unsigned int)open_func));
1278 return False;
1279 }
1280
1281 /* Create the NT compatible share modes. */
1282 switch (GET_DENY_MODE(deny_mode)) {
1283 case DENY_ALL:
1284 share_mode = FILE_SHARE_NONE;
1285 break;
1286
1287 case DENY_WRITE:
1288 share_mode = FILE_SHARE_READ;
1289 break;
1290
1291 case DENY_READ:
1292 share_mode = FILE_SHARE_WRITE;
1293 break;
1294
1295 case DENY_NONE:
1296 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1297 break;
1298
1299 case DENY_DOS:
1300 private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1301 if (is_executable(smb_fname->base_name)) {
1302 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1303 } else {
1304 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1305 share_mode = FILE_SHARE_READ;
1306 } else {
1307 share_mode = FILE_SHARE_NONE;
1308 }
1309 }
1310 break;
1311
1312 case DENY_FCB:
1313 private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1314 share_mode = FILE_SHARE_NONE;
1315 break;
1316
1317 default:
1318 DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1319 (unsigned int)GET_DENY_MODE(deny_mode) ));
1320 return False;
1321 }
1322
1323 DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1324 "share_mode = 0x%x, create_disposition = 0x%x, "
1325 "create_options = 0x%x private_flags = 0x%x\n",
1326 smb_fname_str_dbg(smb_fname),
1327 (unsigned int)access_mask,
1328 (unsigned int)share_mode,
1329 (unsigned int)create_disposition,
1330 (unsigned int)create_options,
1331 (unsigned int)private_flags));
1332
1333 if (paccess_mask) {
1334 *paccess_mask = access_mask;
1335 }
1336 if (pshare_mode) {
1337 *pshare_mode = share_mode;
1338 }
1339 if (pcreate_disposition) {
1340 *pcreate_disposition = create_disposition;
1341 }
1342 if (pcreate_options) {
1343 *pcreate_options = create_options;
1344 }
1345 if (pprivate_flags) {
1346 *pprivate_flags = private_flags;
1347 }
1348
1349 return True;
1350
1351 }
1352
1353 static void schedule_defer_open(struct share_mode_lock *lck,
1354 struct timeval request_time,
1355 struct smb_request *req)
1356 {
1357 struct deferred_open_record state;
1358
1359 /* This is a relative time, added to the absolute
1360 request_time value to get the absolute timeout time.
1361 Note that if this is the second or greater time we enter
1362 this codepath for this particular request mid then
1363 request_time is left as the absolute time of the *first*
1364 time this request mid was processed. This is what allows
1365 the request to eventually time out. */
1366
1367 struct timeval timeout;
1368
1369 /* Normally the smbd we asked should respond within
1370 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1371 * the client did, give twice the timeout as a safety
1372 * measure here in case the other smbd is stuck
1373 * somewhere else. */
1374
1375 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1376
1377 /* Nothing actually uses state.delayed_for_oplocks
1378 but it's handy to differentiate in debug messages
1379 between a 30 second delay due to oplock break, and
1380 a 1 second delay for share mode conflicts. */
1381
1382 state.delayed_for_oplocks = True;
1383 state.id = lck->id;
1384
1385 if (!request_timed_out(request_time, timeout)) {
1386 defer_open(lck, request_time, timeout, req, &state);
1387 }
1388 }
1389
1390 /****************************************************************************
1391 Work out what access_mask to use from what the client sent us.
1392 ****************************************************************************/
1393
1394 static NTSTATUS calculate_access_mask(connection_struct *conn,
1395 const struct smb_filename *smb_fname,
1396 bool file_existed,
1397 uint32_t access_mask,
1398 uint32_t *access_mask_out)
1399 {
1400 NTSTATUS status;
1401
1402 /*
1403 * Convert GENERIC bits to specific bits.
1404 */
1405
1406 se_map_generic(&access_mask, &file_generic_mapping);
1407
1408 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1409 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1410 if (file_existed) {
1411
1412 struct security_descriptor *sd;
1413 uint32_t access_granted = 0;
1414
1415 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1416 (SECINFO_OWNER |
1417 SECINFO_GROUP |
1418 DACL_SECURITY_INFORMATION),&sd);
1419
1420 if (!NT_STATUS_IS_OK(status)) {
1421 DEBUG(10, ("calculate_access_mask: Could not get acl "
1422 "on file %s: %s\n",
1423 smb_fname_str_dbg(smb_fname),
1424 nt_errstr(status)));
1425 return NT_STATUS_ACCESS_DENIED;
1426 }
1427
1428 status = smb1_file_se_access_check(conn,
1429 sd,
1430 get_current_nttok(conn),
1431 access_mask,
1432 &access_granted);
1433
1434 TALLOC_FREE(sd);
1435
1436 if (!NT_STATUS_IS_OK(status)) {
1437 DEBUG(10, ("calculate_access_mask: Access denied on "
1438 "file %s: when calculating maximum access\n",
1439 smb_fname_str_dbg(smb_fname)));
1440 return NT_STATUS_ACCESS_DENIED;
1441 }
1442
1443 access_mask = access_granted;
1444 } else {
1445 access_mask = FILE_GENERIC_ALL;
1446 }
1447 }
1448
1449 *access_mask_out = access_mask;
1450 return NT_STATUS_OK;
1451 }
1452
1453 /****************************************************************************
1454 Remove the deferred open entry under lock.
1455 ****************************************************************************/
1456
1457 void remove_deferred_open_entry(struct file_id id, uint64_t mid)
1458 {
1459 struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1460 NULL, NULL, NULL);
1461 if (lck == NULL) {
1462 DEBUG(0, ("could not get share mode lock\n"));
1463 } else {
1464 del_deferred_open_entry(lck, mid);
1465 TALLOC_FREE(lck);
1466 }
1467 }
1468
1469 /****************************************************************************
1470 Open a file with a share mode. Passed in an already created files_struct *.
1471 ****************************************************************************/
1472
1473 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1474 struct smb_request *req,
1475 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1476 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1477 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1478 uint32 create_options, /* options such as delete on close. */
1479 uint32 new_dos_attributes, /* attributes used for new file. */
1480 int oplock_request, /* internal Samba oplock codes. */
1481 /* Information (FILE_EXISTS etc.) */
1482 uint32_t private_flags, /* Samba specific flags. */
1483 int *pinfo,
1484 files_struct *fsp)
1485 {
1486 struct smb_filename *smb_fname = fsp->fsp_name;
1487 int flags=0;
1488 int flags2=0;
1489 bool file_existed = VALID_STAT(smb_fname->st);
1490 bool def_acl = False;
1491 bool posix_open = False;
1492 bool new_file_created = False;
1493 bool clear_ads = false;
1494 struct file_id id;
1495 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1496 mode_t new_unx_mode = (mode_t)0;
1497 mode_t unx_mode = (mode_t)0;
1498 int info;
1499 uint32 existing_dos_attributes = 0;
1500 struct timeval request_time = timeval_zero();
1501 struct share_mode_lock *lck = NULL;
1502 uint32 open_access_mask = access_mask;
1503 NTSTATUS status;
1504 char *parent_dir;
1505
1506 ZERO_STRUCT(id);
1507
1508 if (conn->printer) {
1509 /*
1510 * Printers are handled completely differently.
1511 * Most of the passed parameters are ignored.
1512 */
1513
1514 if (pinfo) {
1515 *pinfo = FILE_WAS_CREATED;
1516 }
1517
1518 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1519 smb_fname_str_dbg(smb_fname)));
1520
1521 if (!req) {
1522 DEBUG(0,("open_file_ntcreate: printer open without "
1523 "an SMB request!\n"));
1524 return NT_STATUS_INTERNAL_ERROR;
1525 }
1526
1527 return print_fsp_open(req, conn, smb_fname->base_name,
1528 req->vuid, fsp);
1529 }
1530
1531 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1532 NULL)) {
1533 return NT_STATUS_NO_MEMORY;
1534 }
1535
1536 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1537 posix_open = True;
1538 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1539 new_dos_attributes = 0;
1540 } else {
1541 /* We add aARCH to this as this mode is only used if the file is
1542 * created new. */
1543 unx_mode = unix_mode(conn, new_dos_attributes | aARCH,
1544 smb_fname, parent_dir);
1545 }
1546
1547 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1548 "access_mask=0x%x share_access=0x%x "
1549 "create_disposition = 0x%x create_options=0x%x "
1550 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1551 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1552 access_mask, share_access, create_disposition,
1553 create_options, (unsigned int)unx_mode, oplock_request,
1554 (unsigned int)private_flags));
1555
1556 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1557 DEBUG(0, ("No smb request but not an internal only open!\n"));
1558 return NT_STATUS_INTERNAL_ERROR;
1559 }
1560
1561 /*
1562 * Only non-internal opens can be deferred at all
1563 */
1564
1565 if (req) {
1566 void *ptr;
1567 if (get_deferred_open_message_state(req,
1568 &request_time,
1569 &ptr)) {
1570
1571 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1572 /* Remember the absolute time of the original
1573 request with this mid. We'll use it later to
1574 see if this has timed out. */
1575
1576 /* Remove the deferred open entry under lock. */
1577 remove_deferred_open_entry(state->id, req->mid);
1578
1579 /* Ensure we don't reprocess this message. */
1580 remove_deferred_open_message_smb(req->mid);
1581 }
1582 }
1583
1584 status = check_name(conn, smb_fname->base_name);
1585 if (!NT_STATUS_IS_OK(status)) {
1586 return status;
1587 }
1588
1589 if (!posix_open) {
1590 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1591 if (file_existed) {
1592 existing_dos_attributes = dos_mode(conn, smb_fname);
1593 }
1594 }
1595
1596 /* ignore any oplock requests if oplocks are disabled */
1597 if (!lp_oplocks(SNUM(conn)) ||
1598 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1599 /* Mask off everything except the private Samba bits. */
1600 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1601 }
1602
1603 /* this is for OS/2 long file names - say we don't support them */
1604 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1605 /* OS/2 Workplace shell fix may be main code stream in a later
1606 * release. */
1607 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1608 "supported.\n"));
1609 if (use_nt_status()) {
1610 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1611 }
1612 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1613 }
1614
1615 switch( create_disposition ) {
1616 /*
1617 * Currently we're using FILE_SUPERSEDE as the same as
1618 * FILE_OVERWRITE_IF but they really are
1619 * different. FILE_SUPERSEDE deletes an existing file
1620 * (requiring delete access) then recreates it.
1621 */
1622 case FILE_SUPERSEDE:
1623 /* If file exists replace/overwrite. If file doesn't
1624 * exist create. */
1625 flags2 |= (O_CREAT | O_TRUNC);
1626 clear_ads = true;
1627 break;
1628
1629 case FILE_OVERWRITE_IF:
1630 /* If file exists replace/overwrite. If file doesn't
1631 * exist create. */
1632 flags2 |= (O_CREAT | O_TRUNC);
1633 clear_ads = true;
1634 break;
1635
1636 case FILE_OPEN:
1637 /* If file exists open. If file doesn't exist error. */
1638 if (!file_existed) {
1639 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1640 "requested for file %s and file "
1641 "doesn't exist.\n",
1642 smb_fname_str_dbg(smb_fname)));
1643 errno = ENOENT;
1644 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1645 }
1646 break;
1647
1648 case FILE_OVERWRITE:
1649 /* If file exists overwrite. If file doesn't exist
1650 * error. */
1651 if (!file_existed) {
1652 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1653 "requested for file %s and file "
1654 "doesn't exist.\n",
1655 smb_fname_str_dbg(smb_fname) ));
1656 errno = ENOENT;
1657 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1658 }
1659 flags2 |= O_TRUNC;
1660 clear_ads = true;
1661 break;
1662
1663 case FILE_CREATE:
1664 /* If file exists error. If file doesn't exist
1665 * create. */
1666 if (file_existed) {
1667 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1668 "requested for file %s and file "
1669 "already exists.\n",
1670 smb_fname_str_dbg(smb_fname)));
1671 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1672 errno = EISDIR;
1673 } else {
1674 errno = EEXIST;
1675 }
1676 return map_nt_error_from_unix(errno);
1677 }
1678 flags2 |= (O_CREAT|O_EXCL);
1679 break;
1680
1681 case FILE_OPEN_IF:
1682 /* If file exists open. If file doesn't exist
1683 * create. */
1684 flags2 |= O_CREAT;
1685 break;
1686
1687 default:
1688 return NT_STATUS_INVALID_PARAMETER;
1689 }
1690
1691 /* We only care about matching attributes on file exists and
1692 * overwrite. */
1693
1694 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1695 (create_disposition == FILE_OVERWRITE_IF))) {
1696 if (!open_match_attributes(conn, existing_dos_attributes,
1697 new_dos_attributes,
1698 smb_fname->st.st_ex_mode,
1699 unx_mode, &new_unx_mode)) {
1700 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1701 "for file %s (%x %x) (0%o, 0%o)\n",
1702 smb_fname_str_dbg(smb_fname),
1703 existing_dos_attributes,
1704 new_dos_attributes,
1705 (unsigned int)smb_fname->st.st_ex_mode,
1706 (unsigned int)unx_mode ));
1707 errno = EACCES;
1708 return NT_STATUS_ACCESS_DENIED;
1709 }
1710 }
1711
1712 status = calculate_access_mask(conn, smb_fname, file_existed,
1713 access_mask,
1714 &access_mask);
1715 if (!NT_STATUS_IS_OK(status)) {
1716 DEBUG(10, ("open_file_ntcreate: calculate_access_mask "
1717 "on file %s returned %s\n",
1718 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1719 return status;
1720 }
1721
1722 open_access_mask = access_mask;
1723
1724 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1725 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1726 }
1727
1728 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1729 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1730 access_mask));
1731
1732 /*
1733 * Note that we ignore the append flag as append does not
1734 * mean the same thing under DOS and Unix.
1735 */
1736
1737 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1738 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1739 /* DENY_DOS opens are always underlying read-write on the
1740 file handle, no matter what the requested access mask
1741 says. */
1742 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1743 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1744 flags = O_RDWR;
1745 } else {
1746 flags = O_WRONLY;
1747 }
1748 } else {
1749 flags = O_RDONLY;
1750 }
1751
1752 /*
1753 * Currently we only look at FILE_WRITE_THROUGH for create options.
1754 */
1755
1756 #if defined(O_SYNC)
1757 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1758 flags2 |= O_SYNC;
1759 }
1760 #endif /* O_SYNC */
1761
1762 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1763 flags2 |= O_APPEND;
1764 }
1765
1766 if (!posix_open && !CAN_WRITE(conn)) {
1767 /*
1768 * We should really return a permission denied error if either
1769 * O_CREAT or O_TRUNC are set, but for compatibility with
1770 * older versions of Samba we just AND them out.
1771 */
1772 flags2 &= ~(O_CREAT|O_TRUNC);
1773 }
1774
1775 /*
1776 * Ensure we can't write on a read-only share or file.
1777 */
1778
1779 if (flags != O_RDONLY && file_existed &&
1780 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1781 DEBUG(5,("open_file_ntcreate: write access requested for "
1782 "file %s on read only %s\n",
1783 smb_fname_str_dbg(smb_fname),
1784 !CAN_WRITE(conn) ? "share" : "file" ));
1785 errno = EACCES;
1786 return NT_STATUS_ACCESS_DENIED;
1787 }
1788
1789 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1790 fsp->share_access = share_access;
1791 fsp->fh->private_options = private_flags;
1792 fsp->access_mask = open_access_mask; /* We change this to the
1793 * requested access_mask after
1794 * the open is done. */
1795 fsp->posix_open = posix_open;
1796
1797 /* Ensure no SAMBA_PRIVATE bits can be set. */
1798 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1799
1800 if (timeval_is_zero(&request_time)) {
1801 request_time = fsp->open_time;
1802 }
1803
1804 if (file_existed) {
1805 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1806 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1807
1808 lck = get_share_mode_lock(talloc_tos(), id,
1809 conn->connectpath,
1810 smb_fname, &old_write_time);
1811
1812 if (lck == NULL) {
1813 DEBUG(0, ("Could not get share mode lock\n"));
1814 return NT_STATUS_SHARING_VIOLATION;
1815 }
1816
1817 /* First pass - send break only on batch oplocks. */
1818 if ((req != NULL)
1819 && delay_for_oplocks(lck, fsp, req->mid, 1,
1820 oplock_request)) {
1821 schedule_defer_open(lck, request_time, req);
1822 TALLOC_FREE(lck);
1823 return NT_STATUS_SHARING_VIOLATION;
1824 }
1825
1826 /* Use the client requested access mask here, not the one we
1827 * open with. */
1828 status = open_mode_check(conn, lck, access_mask, share_access,
1829 create_options, &file_existed);
1830
1831 if (NT_STATUS_IS_OK(status)) {
1832 /* We might be going to allow this open. Check oplock
1833 * status again. */
1834 /* Second pass - send break for both batch or
1835 * exclusive oplocks. */
1836 if ((req != NULL)
1837 && delay_for_oplocks(lck, fsp, req->mid, 2,
1838 oplock_request)) {
1839 schedule_defer_open(lck, request_time, req);
1840 TALLOC_FREE(lck);
1841 return NT_STATUS_SHARING_VIOLATION;
1842 }
1843 }
1844
1845 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1846 /* DELETE_PENDING is not deferred for a second */
1847 TALLOC_FREE(lck);
1848 return status;
1849 }
1850
1851 if (!NT_STATUS_IS_OK(status)) {
1852 uint32 can_access_mask;
1853 bool can_access = True;
1854
1855 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1856
1857 /* Check if this can be done with the deny_dos and fcb
1858 * calls. */
1859 if (private_flags &
1860 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1861 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1862 if (req == NULL) {
1863 DEBUG(0, ("DOS open without an SMB "
1864 "request!\n"));
1865 TALLOC_FREE(lck);
1866 return NT_STATUS_INTERNAL_ERROR;
1867 }
1868
1869 /* Use the client requested access mask here,
1870 * not the one we open with. */
1871 status = fcb_or_dos_open(req,
1872 conn,
1873 fsp,
1874 smb_fname,
1875 id,
1876 req->smbpid,
1877 req->vuid,
1878 access_mask,
1879 share_access,
1880 create_options);
1881
1882 if (NT_STATUS_IS_OK(status)) {
1883 TALLOC_FREE(lck);
1884 if (pinfo) {
1885 *pinfo = FILE_WAS_OPENED;
1886 }
1887 return NT_STATUS_OK;
1888 }
1889 }
1890
1891 /*
1892 * This next line is a subtlety we need for
1893 * MS-Access. If a file open will fail due to share
1894 * permissions and also for security (access) reasons,
1895 * we need to return the access failed error, not the
1896 * share error. We can't open the file due to kernel
1897 * oplock deadlock (it's possible we failed above on
1898 * the open_mode_check()) so use a userspace check.
1899 */
1900
1901 if (flags & O_RDWR) {
1902 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1903 } else if (flags & O_WRONLY) {
1904 can_access_mask = FILE_WRITE_DATA;
1905 } else {
1906 can_access_mask = FILE_READ_DATA;
1907 }
1908
1909 if (((can_access_mask & FILE_WRITE_DATA) &&
1910 !CAN_WRITE(conn)) ||
1911 !can_access_file_data(conn, smb_fname,
1912 can_access_mask)) {
1913 can_access = False;
1914 }
1915
1916 /*
1917 * If we're returning a share violation, ensure we
1918 * cope with the braindead 1 second delay.
1919 */
1920
1921 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1922 lp_defer_sharing_violations()) {
1923 struct timeval timeout;
1924 struct deferred_open_record state;
1925 int timeout_usecs;
1926
1927 /* this is a hack to speed up torture tests
1928 in 'make test' */
1929 timeout_usecs = lp_parm_int(SNUM(conn),
1930 "smbd","sharedelay",
1931 SHARING_VIOLATION_USEC_WAIT);
1932
1933 /* This is a relative time, added to the absolute
1934 request_time value to get the absolute timeout time.
1935 Note that if this is the second or greater time we enter
1936 this codepath for this particular request mid then
1937 request_time is left as the absolute time of the *first*
1938 time this request mid was processed. This is what allows
1939 the request to eventually time out. */
1940
1941 timeout = timeval_set(0, timeout_usecs);
1942
1943 /* Nothing actually uses state.delayed_for_oplocks
1944 but it's handy to differentiate in debug messages
1945 between a 30 second delay due to oplock break, and
1946 a 1 second delay for share mode conflicts. */
1947
1948 state.delayed_for_oplocks = False;
1949 state.id = id;
1950
1951 if ((req != NULL)
1952 && !request_timed_out(request_time,
1953 timeout)) {
1954 defer_open(lck, request_time, timeout,
1955 req, &state);
1956 }
1957 }
1958
1959 TALLOC_FREE(lck);
1960 if (can_access) {
1961 /*
1962 * We have detected a sharing violation here
1963 * so return the correct error code
1964 */
1965 status = NT_STATUS_SHARING_VIOLATION;
1966 } else {
1967 status = NT_STATUS_ACCESS_DENIED;
1968 }
1969 return status;
1970 }
1971
1972 /*
1973 * We exit this block with the share entry *locked*.....
1974 */
1975 }
1976
1977 SMB_ASSERT(!file_existed || (lck != NULL));
1978
1979 /*
1980 * Ensure we pay attention to default ACLs on directories if required.
1981 */
1982
1983 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1984 (def_acl = directory_has_default_acl(conn, parent_dir))) {
1985 unx_mode = 0777;
1986 }
1987
1988 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1989 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1990 (unsigned int)flags, (unsigned int)flags2,
1991 (unsigned int)unx_mode, (unsigned int)access_mask,
1992 (unsigned int)open_access_mask));
1993
1994 /*
1995 * open_file strips any O_TRUNC flags itself.
1996 */
1997
1998 fsp_open = open_file(fsp, conn, req, parent_dir,
1999 flags|flags2, unx_mode, access_mask,
2000 open_access_mask);
2001
2002 if (!NT_STATUS_IS_OK(fsp_open)) {
2003 if (lck != NULL) {
2004 TALLOC_FREE(lck);
2005 }
2006 return fsp_open;
2007 }
2008
2009 if (!file_existed) {
2010 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2011 /*
2012 * Deal with the race condition where two smbd's detect the
2013 * file doesn't exist and do the create at the same time. One
2014 * of them will win and set a share mode, the other (ie. this
2015 * one) should check if the requested share mode for this
2016 * create is allowed.
2017 */
2018
2019 /*
2020 * Now the file exists and fsp is successfully opened,
2021 * fsp->dev and fsp->inode are valid and should replace the
2022 * dev=0,inode=0 from a non existent file. Spotted by
2023 * Nadav Danieli <nadavd@exanet.com>. JRA.
2024 */
2025
2026 id = fsp->file_id;
2027
2028 lck = get_share_mode_lock(talloc_tos(), id,
2029 conn->connectpath,
2030 smb_fname, &old_write_time);
2031
2032 if (lck == NULL) {
2033 DEBUG(0, ("open_file_ntcreate: Could not get share "
2034 "mode lock for %s\n",
2035 smb_fname_str_dbg(smb_fname)));
2036 fd_close(fsp);
2037 return NT_STATUS_SHARING_VIOLATION;
2038 }
2039
2040 /* First pass - send break only on batch oplocks. */
2041 if ((req != NULL)
2042 && delay_for_oplocks(lck, fsp, req->mid, 1,
2043 oplock_request)) {
2044 schedule_defer_open(lck, request_time, req);
2045 TALLOC_FREE(lck);
2046 fd_close(fsp);
2047 return NT_STATUS_SHARING_VIOLATION;
2048 }
2049
2050 status = open_mode_check(conn, lck, access_mask, share_access,
2051 create_options, &file_existed);
2052
2053 if (NT_STATUS_IS_OK(status)) {
2054 /* We might be going to allow this open. Check oplock
2055 * status again. */
2056 /* Second pass - send break for both batch or
2057 * exclusive oplocks. */
2058 if ((req != NULL)
2059 && delay_for_oplocks(lck, fsp, req->mid, 2,
2060 oplock_request)) {
2061 schedule_defer_open(lck, request_time, req);
2062 TALLOC_FREE(lck);
2063 fd_close(fsp);
2064 return NT_STATUS_SHARING_VIOLATION;
2065 }
2066 }
2067
2068 if (!NT_STATUS_IS_OK(status)) {
2069 struct deferred_open_record state;
2070
2071 fd_close(fsp);
2072
2073 state.delayed_for_oplocks = False;
2074 state.id = id;
2075
2076 /* Do it all over again immediately. In the second
2077 * round we will find that the file existed and handle
2078 * the DELETE_PENDING and FCB cases correctly. No need
2079 * to duplicate the code here. Essentially this is a
2080 * "goto top of this function", but don't tell
2081 * anybody... */
2082
2083 if (req != NULL) {
2084 defer_open(lck, request_time, timeval_zero(),
2085 req, &state);
2086 }
2087 TALLOC_FREE(lck);
2088 return status;
2089 }
2090
2091 /*
2092 * We exit this block with the share entry *locked*.....
2093 */
2094
2095 }
2096
2097 SMB_ASSERT(lck != NULL);
2098
2099 /* Delete streams if create_disposition requires it */
2100 if (file_existed && clear_ads &&
2101 !is_ntfs_stream_smb_fname(smb_fname)) {
2102 status = delete_all_streams(conn, smb_fname->base_name);
2103 if (!NT_STATUS_IS_OK(status)) {
2104 TALLOC_FREE(lck);
2105 fd_close(fsp);
2106 return status;
2107 }
2108 }
2109
2110 /* note that we ignore failure for the following. It is
2111 basically a hack for NFS, and NFS will never set one of
2112 these only read them. Nobody but Samba can ever set a deny
2113 mode and we have already checked our more authoritative
2114 locking database for permission to set this deny mode. If
2115 the kernel refuses the operations then the kernel is wrong.
2116 note that GPFS supports it as well - jmcd */
2117
2118 if (fsp->fh->fd != -1) {
2119 int ret_flock;
2120 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2121 if(ret_flock == -1 ){
2122
2123 TALLOC_FREE(lck);
2124 fd_close(fsp);
2125
2126 return NT_STATUS_SHARING_VIOLATION;
2127 }
2128 }
2129
2130 /*
2131 * At this point onwards, we can guarentee that the share entry
2132 * is locked, whether we created the file or not, and that the
2133 * deny mode is compatible with all current opens.
2134 */
2135
2136 /*
2137 * If requested, truncate the file.
2138 */
2139
2140 if (flags2&O_TRUNC) {
2141 /*
2142 * We are modifing the file after open - update the stat
2143 * struct..
2144 */
2145 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2146 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2147 status = map_nt_error_from_unix(errno);
2148 TALLOC_FREE(lck);
2149 fd_close(fsp);
2150 return status;
2151 }
2152 }
2153
2154 /*
2155 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2156 */
2157 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2158
2159 if (file_existed) {
2160 /* stat opens on existing files don't get oplocks. */
2161 if (is_stat_open(open_access_mask)) {
2162 fsp->oplock_type = NO_OPLOCK;
2163 }
2164
2165 if (!(flags2 & O_TRUNC)) {
2166 info = FILE_WAS_OPENED;
2167 } else {
2168 info = FILE_WAS_OVERWRITTEN;
2169 }
2170 } else {
2171 info = FILE_WAS_CREATED;
2172 }
2173
2174 if (pinfo) {
2175 *pinfo = info;
2176 }
2177
2178 /*
2179 * Setup the oplock info in both the shared memory and
2180 * file structs.
2181 */
2182
2183 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2184 /* Could not get the kernel oplock */
2185 fsp->oplock_type = NO_OPLOCK;
2186 }
2187
2188 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2189 new_file_created = True;
2190 }
2191
2192 set_share_mode(lck, fsp, get_current_uid(conn), 0,
2193 fsp->oplock_type);
2194
2195 /* Handle strange delete on close create semantics. */
2196 if (create_options & FILE_DELETE_ON_CLOSE) {
2197
2198 status = can_set_delete_on_close(fsp, new_dos_attributes);
2199
2200 if (!NT_STATUS_IS_OK(status)) {
2201 /* Remember to delete the mode we just added. */
2202 del_share_mode(lck, fsp);
2203 TALLOC_FREE(lck);
2204 fd_close(fsp);
2205 return status;
2206 }
2207 /* Note that here we set the *inital* delete on close flag,
2208 not the regular one. The magic gets handled in close. */
2209 fsp->initial_delete_on_close = True;
2210 }
2211
2212 if (new_file_created) {
2213 /* Files should be initially set as archive */
2214 if (lp_map_archive(SNUM(conn)) ||
2215 lp_store_dos_attributes(SNUM(conn))) {
2216 if (!posix_open) {
2217 if (file_set_dosmode(conn, smb_fname,
2218 new_dos_attributes | aARCH,
2219 parent_dir, true) == 0) {
2220 unx_mode = smb_fname->st.st_ex_mode;
2221 }
2222 }
2223 }
2224 }
2225
2226 /*
2227 * Take care of inherited ACLs on created files - if default ACL not
2228 * selected.
2229 */
2230
2231 if (!posix_open && !file_existed && !def_acl) {
2232
2233 int saved_errno = errno; /* We might get ENOSYS in the next
2234 * call.. */
2235
2236 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2237 errno == ENOSYS) {
2238 errno = saved_errno; /* Ignore ENOSYS */
2239 }
2240
2241 } else if (new_unx_mode) {
2242
2243 int ret = -1;
2244
2245 /* Attributes need changing. File already existed. */
2246
2247 {
2248 int saved_errno = errno; /* We might get ENOSYS in the
2249 * next call.. */
2250 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2251
2252 if (ret == -1 && errno == ENOSYS) {
2253 errno = saved_errno; /* Ignore ENOSYS */
2254 } else {
2255 DEBUG(5, ("open_file_ntcreate: reset "
2256 "attributes of file %s to 0%o\n",
2257 smb_fname_str_dbg(smb_fname),
2258 (unsigned int)new_unx_mode));
2259 ret = 0; /* Don't do the fchmod below. */
2260 }
2261 }
2262
2263 if ((ret == -1) &&
2264 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2265 DEBUG(5, ("open_file_ntcreate: failed to reset "
2266 "attributes of file %s to 0%o\n",
2267 smb_fname_str_dbg(smb_fname),
2268 (unsigned int)new_unx_mode));
2269 }
2270
2271 /* If this is a successful open, we must remove any deferred open
2272 * records. */
2273 if (req != NULL) {
2274 del_deferred_open_entry(lck, req->mid);
2275 }
2276 TALLOC_FREE(lck);
2277
2278 return NT_STATUS_OK;
2279 }
2280
2281
2282 /****************************************************************************
2283 Open a file for for write to ensure that we can fchmod it.
2284 ****************************************************************************/
2285
2286 NTSTATUS open_file_fchmod(struct smb_request *req, connection_struct *conn,
2287 struct smb_filename *smb_fname,
2288 files_struct **result)
2289 {
2290 files_struct *fsp = NULL;
2291 NTSTATUS status;
2292
2293 if (!VALID_STAT(smb_fname->st)) {
2294 return NT_STATUS_INVALID_PARAMETER;
2295 }
2296
2297 status = file_new(req, conn, &fsp);
2298 if(!NT_STATUS_IS_OK(status)) {
2299 return status;
2300 }
2301
2302 status = SMB_VFS_CREATE_FILE(
2303 conn, /* conn */
2304 NULL, /* req */
2305 0, /* root_dir_fid */
2306 smb_fname, /* fname */
2307 FILE_WRITE_DATA, /* access_mask */
2308 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2309 FILE_SHARE_DELETE),
2310 FILE_OPEN, /* create_disposition*/
2311 0, /* create_options */
2312 0, /* file_attributes */
2313 0, /* oplock_request */
2314 0, /* allocation_size */
2315 0, /* private_flags */
2316 NULL, /* sd */
2317 NULL, /* ea_list */
2318 &fsp, /* result */
2319 NULL); /* pinfo */
2320
2321 /*
2322 * This is not a user visible file open.
2323 * Don't set a share mode.
2324 */
2325
2326 if (!NT_STATUS_IS_OK(status)) {
2327 file_free(req, fsp);
2328 return status;
2329 }
2330
2331 *result = fsp;
2332 return NT_STATUS_OK;
2333 }
2334
2335 /****************************************************************************
2336 Close the fchmod file fd - ensure no locks are lost.
2337 ****************************************************************************/
2338
2339 NTSTATUS close_file_fchmod(struct smb_request *req, files_struct *fsp)
2340 {
2341 NTSTATUS status = fd_close(fsp);
2342 file_free(req, fsp);
2343 return status;
2344 }
2345
2346 static NTSTATUS mkdir_internal(connection_struct *conn,
2347 struct smb_filename *smb_dname,
2348 uint32 file_attributes)
2349 {
2350 mode_t mode;
2351 char *parent_dir;
2352 NTSTATUS status;
2353 bool posix_open = false;
2354
2355 if(!CAN_WRITE(conn)) {
2356 DEBUG(5,("mkdir_internal: failing create on read-only share "
2357 "%s\n", lp_servicename(SNUM(conn))));
2358 return NT_STATUS_ACCESS_DENIED;
2359 }
2360
2361 status = check_name(conn, smb_dname->base_name);
2362 if (!NT_STATUS_IS_OK(status)) {
2363 return status;
2364 }
2365
2366 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2367 NULL)) {
2368 return NT_STATUS_NO_MEMORY;
2369 }
2370
2371 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2372 posix_open = true;
2373 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2374 } else {
2375 mode = unix_mode(conn, aDIR, smb_dname, parent_dir);
2376 }
2377
2378 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2379 return map_nt_error_from_unix(errno);
2380 }
2381
2382 /* Ensure we're checking for a symlink here.... */
2383 /* We don't want to get caught by a symlink racer. */
2384
2385 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2386 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2387 smb_fname_str_dbg(smb_dname), strerror(errno)));
2388 return map_nt_error_from_unix(errno);
2389 }
2390
2391 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2392 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2393 smb_fname_str_dbg(smb_dname)));
2394 return NT_STATUS_ACCESS_DENIED;
2395 }
2396
2397 if (lp_store_dos_attributes(SNUM(conn))) {
2398 if (!posix_open) {
2399 file_set_dosmode(conn, smb_dname,
2400 file_attributes | aDIR,
2401 parent_dir, true);
2402 }
2403 }
2404
2405 if (lp_inherit_perms(SNUM(conn))) {
2406 inherit_access_posix_acl(conn, parent_dir,
2407 smb_dname->base_name, mode);
2408 }
2409
2410 if (!posix_open) {
2411 /*
2412 * Check if high bits should have been set,
2413 * then (if bits are missing): add them.
2414 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2415 * dir.
2416 */
2417 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2418 (mode & ~smb_dname->st.st_ex_mode)) {
2419 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2420 (smb_dname->st.st_ex_mode |
2421 (mode & ~smb_dname->st.st_ex_mode)));
2422 }
2423 }
2424
2425 /* Change the owner if required. */
2426 if (lp_inherit_owner(SNUM(conn))) {
2427 change_dir_owner_to_parent(conn, parent_dir,
2428 smb_dname->base_name,
2429 &smb_dname->st);
2430 }
2431
2432 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2433 smb_dname->base_name);
2434
2435 return NT_STATUS_OK;
2436 }
2437
2438 /****************************************************************************
2439 Open a directory from an NT SMB call.
2440 ****************************************************************************/
2441
2442 static NTSTATUS open_directory(connection_struct *conn,
2443 struct smb_request *req,
2444 struct smb_filename *smb_dname,
2445 uint32 access_mask,
2446 uint32 share_access,
2447 uint32 create_disposition,
2448 uint32 create_options,
2449 uint32 file_attributes,
2450 int *pinfo,
2451 files_struct **result)
2452 {
2453 files_struct *fsp = NULL;
2454 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2455 struct share_mode_lock *lck = NULL;
2456 NTSTATUS status;
2457 struct timespec mtimespec;
2458 int info = 0;
2459
2460 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2461
2462 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2463 "share_access = 0x%x create_options = 0x%x, "
2464 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2465 smb_fname_str_dbg(smb_dname),
2466 (unsigned int)access_mask,
2467 (unsigned int)share_access,
2468 (unsigned int)create_options,
2469 (unsigned int)create_disposition,
2470 (unsigned int)file_attributes));
2471
2472 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2473 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2474 is_ntfs_stream_smb_fname(smb_dname)) {
2475 DEBUG(2, ("open_directory: %s is a stream name!\n",
2476 smb_fname_str_dbg(smb_dname)));
2477 return NT_STATUS_NOT_A_DIRECTORY;
2478 }
2479
2480 status = calculate_access_mask(conn, smb_dname, dir_existed,
2481 access_mask, &access_mask);
2482 if (!NT_STATUS_IS_OK(status)) {
2483 DEBUG(10, ("open_directory: calculate_access_mask "
2484 "on file %s returned %s\n",
2485 smb_fname_str_dbg(smb_dname),
2486 nt_errstr(status)));
2487 return status;
2488 }
2489
2490 /* We need to support SeSecurityPrivilege for this. */
2491 if (access_mask & SEC_FLAG_SYSTEM_SECURITY) {
2492 DEBUG(10, ("open_directory: open on %s "
2493 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2494 smb_fname_str_dbg(smb_dname)));
2495 return NT_STATUS_PRIVILEGE_NOT_HELD;
2496 }
2497
2498 switch( create_disposition ) {
2499 case FILE_OPEN:
2500
2501 info = FILE_WAS_OPENED;
2502
2503 /*
2504 * We want to follow symlinks here.
2505 */
2506
2507 if (SMB_VFS_STAT(conn, smb_dname) != 0) {
2508 return map_nt_error_from_unix(errno);
2509 }
2510
2511 break;
2512
2513 case FILE_CREATE:
2514
2515 /* If directory exists error. If directory doesn't
2516 * exist create. */
2517
2518 status = mkdir_internal(conn, smb_dname,
2519 file_attributes);
2520
2521 if (!NT_STATUS_IS_OK(status)) {
2522 DEBUG(2, ("open_directory: unable to create "
2523 "%s. Error was %s\n",
2524 smb_fname_str_dbg(smb_dname),
2525 nt_errstr(status)));
2526 return status;
2527 }
2528
2529 info = FILE_WAS_CREATED;
2530 break;
2531
2532 case FILE_OPEN_IF:
2533 /*
2534 * If directory exists open. If directory doesn't
2535 * exist create.
2536 */
2537
2538 status = mkdir_internal(conn, smb_dname,
2539 file_attributes);
2540
2541 if (NT_STATUS_IS_OK(status)) {
2542 info = FILE_WAS_CREATED;
2543 }
2544
2545 if (NT_STATUS_EQUAL(status,
2546 NT_STATUS_OBJECT_NAME_COLLISION)) {
2547 info = FILE_WAS_OPENED;
2548 status = NT_STATUS_OK;
2549 }
2550
2551 break;
2552
2553 case FILE_SUPERSEDE:
2554 case FILE_OVERWRITE:
2555 case FILE_OVERWRITE_IF:
2556 default:
2557 DEBUG(5,("open_directory: invalid create_disposition "
2558 "0x%x for directory %s\n",
2559 (unsigned int)create_disposition,
2560 smb_fname_str_dbg(smb_dname)));
2561 return NT_STATUS_INVALID_PARAMETER;
2562 }
2563
2564 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2565 DEBUG(5,("open_directory: %s is not a directory !\n",
2566 smb_fname_str_dbg(smb_dname)));
2567 return NT_STATUS_NOT_A_DIRECTORY;
2568 }
2569
2570 if (info == FILE_WAS_OPENED) {
2571 uint32_t access_granted = 0;
2572 status = smbd_check_open_rights(conn, smb_dname, access_mask,
2573 &access_granted);
2574
2575 /* Were we trying to do a directory open
2576 * for delete and didn't get DELETE
2577 * access (only) ? Check if the
2578 * directory allows DELETE_CHILD.
2579 * See here:
2580 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
2581 * for details. */
2582
2583 if ((NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
2584 (access_mask & DELETE_ACCESS) &&
2585 (access_granted == DELETE_ACCESS) &&
2586 can_delete_file_in_directory(conn, smb_dname))) {
2587 DEBUG(10,("open_directory: overrode ACCESS_DENIED "
2588 "on directory %s\n",
2589 smb_fname_str_dbg(smb_dname)));
2590 status = NT_STATUS_OK;
2591 }
2592
2593 if (!NT_STATUS_IS_OK(status)) {
2594 DEBUG(10, ("open_directory: smbd_check_open_rights on "
2595 "file %s failed with %s\n",
2596 smb_fname_str_dbg(smb_dname),
2597 nt_errstr(status)));
2598 return status;
2599 }
2600 }
2601
2602 status = file_new(req, conn, &fsp);
2603 if(!NT_STATUS_IS_OK(status)) {
2604 return status;
2605 }
2606
2607 /*
2608 * Setup the files_struct for it.
2609 */
2610
2611 fsp->mode = smb_dname->st.st_ex_mode;
2612 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2613 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2614 fsp->file_pid = req ? req->smbpid : 0;
2615 fsp->can_lock = False;
2616 fsp->can_read = False;
2617 fsp->can_write = False;
2618
2619 fsp->share_access = share_access;
2620 fsp->fh->private_options = 0;
2621 /*
2622 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2623 */
2624 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2625 fsp->print_file = NULL;
2626 fsp->modified = False;
2627 fsp->oplock_type = NO_OPLOCK;
2628 fsp->sent_oplock_break = NO_BREAK_SENT;
2629 fsp->is_directory = True;
2630 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2631 status = fsp_set_smb_fname(fsp, smb_dname);
2632 if (!NT_STATUS_IS_OK(status)) {
2633 return status;
2634 }
2635
2636 mtimespec = smb_dname->st.st_ex_mtime;
2637
2638 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2639 conn->connectpath, smb_dname, &mtimespec);
2640
2641 if (lck == NULL) {
2642 DEBUG(0, ("open_directory: Could not get share mode lock for "
2643 "%s\n", smb_fname_str_dbg(smb_dname)));
2644 file_free(req, fsp);
2645 return NT_STATUS_SHARING_VIOLATION;
2646 }
2647
2648 status = open_mode_check(conn, lck, access_mask, share_access,
2649 create_options, &dir_existed);
2650
2651 if (!NT_STATUS_IS_OK(status)) {
2652 TALLOC_FREE(lck);
2653 file_free(req, fsp);
2654 return status;
2655 }
2656
2657 set_share_mode(lck, fsp, get_current_uid(conn), 0, NO_OPLOCK);
2658
2659 /* For directories the delete on close bit at open time seems
2660 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2661 if (create_options & FILE_DELETE_ON_CLOSE) {
2662 status = can_set_delete_on_close(fsp, 0);
2663 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2664 TALLOC_FREE(lck);
2665 file_free(req, fsp);
2666 return status;
2667 }
2668
2669 if (NT_STATUS_IS_OK(status)) {
2670 /* Note that here we set the *inital* delete on close flag,
2671 not the regular one. The magic gets handled in close. */
2672 fsp->initial_delete_on_close = True;
2673 }
2674 }
2675
2676 TALLOC_FREE(lck);
2677
2678 if (pinfo) {
2679 *pinfo = info;
2680 }
2681
2682 *result = fsp;
2683 return NT_STATUS_OK;
2684 }
2685
2686 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2687 struct smb_filename *smb_dname)
2688 {
2689 NTSTATUS status;
2690 files_struct *fsp;
2691
2692 status = SMB_VFS_CREATE_FILE(
2693 conn, /* conn */
2694 req, /* req */
2695 0, /* root_dir_fid */
2696 smb_dname, /* fname */
2697 FILE_READ_ATTRIBUTES, /* access_mask */
2698 FILE_SHARE_NONE, /* share_access */
2699 FILE_CREATE, /* create_disposition*/
2700 FILE_DIRECTORY_FILE, /* create_options */
2701 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2702 0, /* oplock_request */
2703 0, /* allocation_size */
2704 0, /* private_flags */
2705 NULL, /* sd */
2706 NULL, /* ea_list */
2707 &fsp, /* result */
2708 NULL); /* pinfo */
2709
2710 if (NT_STATUS_IS_OK(status)) {
2711 close_file(req, fsp, NORMAL_CLOSE);
2712 }
2713
2714 return status;
2715 }
2716
2717 /****************************************************************************
2718 Receive notification that one of our open files has been renamed by another
2719 smbd process.
2720 ****************************************************************************/
2721
2722 void msg_file_was_renamed(struct messaging_context *msg,
2723 void *private_data,
2724 uint32_t msg_type,
2725 struct server_id server_id,
2726 DATA_BLOB *data)
2727 {
2728 files_struct *fsp;
2729 char *frm = (char *)data->data;
2730 struct file_id id;
2731 const char *sharepath;
2732 const char *base_name;
2733 const char *stream_name;
2734 struct smb_filename *smb_fname = NULL;
2735 size_t sp_len, bn_len;
2736 NTSTATUS status;
2737
2738 if (data->data == NULL
2739 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2740 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2741 (int)data->length));
2742 return;
2743 }
2744
2745 /* Unpack the message. */
2746 pull_file_id_24(frm, &id);
2747 sharepath = &frm[24];
2748 sp_len = strlen(sharepath);
2749 base_name = sharepath + sp_len + 1;
2750 bn_len = strlen(base_name);
2751 stream_name = sharepath + sp_len + 1 + bn_len + 1;
2752
2753 /* stream_name must always be NULL if there is no stream. */
2754 if (stream_name[0] == '\0') {
2755 stream_name = NULL;
2756 }
2757
2758 status = create_synthetic_smb_fname(talloc_tos(), base_name,
2759 stream_name, NULL, &smb_fname);
2760 if (!NT_STATUS_IS_OK(status)) {
2761 return;
2762 }
2763
2764 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2765 "file_id %s\n",
2766 sharepath, smb_fname_str_dbg(smb_fname),
2767 file_id_string_tos(&id)));
2768
2769 for(fsp = file_find_di_first(id); fsp; fsp = file_find_di_next(fsp)) {
2770 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2771
2772 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2773 fsp->fnum, fsp_str_dbg(fsp),
2774 smb_fname_str_dbg(smb_fname)));
2775 status = fsp_set_smb_fname(fsp, smb_fname);
2776 if (!NT_STATUS_IS_OK(status)) {
2777 goto out;
2778 }
2779 } else {
2780 /* TODO. JRA. */
2781 /* Now we have the complete path we can work out if this is
2782 actually within this share and adjust newname accordingly. */
2783 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2784 "not sharepath %s) "
2785 "fnum %d from %s -> %s\n",
2786 fsp->conn->connectpath,
2787 sharepath,
2788 fsp->fnum,
2789 fsp_str_dbg(fsp),
2790 smb_fname_str_dbg(smb_fname)));
2791 }
2792 }
2793 out:
2794 TALLOC_FREE(smb_fname);
2795 return;
2796 }
2797
2798 /*
2799 * If a main file is opened for delete, all streams need to be checked for
2800 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2801 * If that works, delete them all by setting the delete on close and close.
2802 */
2803
2804 NTSTATUS open_streams_for_delete(connection_struct *conn,
2805 const char *fname)
2806 {
2807 struct stream_struct *stream_info;
2808 files_struct **streams;
2809 int i;
2810 unsigned int num_streams;
2811 TALLOC_CTX *frame = talloc_stackframe();
2812 NTSTATUS status;
2813
2814 status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
2815 &num_streams, &stream_info);
2816
2817 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2818 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2819 DEBUG(10, ("no streams around\n"));
2820 TALLOC_FREE(frame);
2821 return NT_STATUS_OK;
2822 }
2823
2824 if (!NT_STATUS_IS_OK(status)) {
2825 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
2826 nt_errstr(status)));
2827 goto fail;
2828 }
2829
2830 DEBUG(10, ("open_streams_for_delete found %d streams\n",
2831 num_streams));
2832
2833 if (num_streams == 0) {
2834 TALLOC_FREE(frame);
2835 return NT_STATUS_OK;
2836 }
2837
2838 streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
2839 if (streams == NULL) {
2840 DEBUG(0, ("talloc failed\n"));
2841 status = NT_STATUS_NO_MEMORY;
2842 goto fail;
2843 }
2844
2845 for (i=0; i<num_streams; i++) {
2846 struct smb_filename *smb_fname = NULL;
2847
2848 if (strequal(stream_info[i].name, "::$DATA")) {
2849 streams[i] = NULL;
2850 continue;
2851 }
2852
2853 status = create_synthetic_smb_fname(talloc_tos(), fname,
2854 stream_info[i].name,
2855 NULL, &smb_fname);
2856 if (!NT_STATUS_IS_OK(status)) {
2857 goto fail;
2858 }
2859
2860 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
2861 DEBUG(10, ("Unable to stat stream: %s\n",
2862 smb_fname_str_dbg(smb_fname)));
2863 }
2864
2865 status = SMB_VFS_CREATE_FILE(
2866 conn, /* conn */
2867 NULL, /* req */
2868 0, /* root_dir_fid */
2869 smb_fname, /* fname */
2870 DELETE_ACCESS, /* access_mask */
2871 (FILE_SHARE_READ | /* share_access */
2872 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
2873 FILE_OPEN, /* create_disposition*/
2874 0, /* create_options */
2875 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
2876 0, /* oplock_request */
2877 0, /* allocation_size */
2878 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
2879 NULL, /* sd */
2880 NULL, /* ea_list */
2881 &streams[i], /* result */
2882 NULL); /* pinfo */
2883
2884 if (!NT_STATUS_IS_OK(status)) {
2885 DEBUG(10, ("Could not open stream %s: %s\n",
2886 smb_fname_str_dbg(smb_fname),
2887 nt_errstr(status)));
2888
2889 TALLOC_FREE(smb_fname);
2890 break;
2891 }
2892 TALLOC_FREE(smb_fname);
2893 }
2894
2895 /*
2896 * don't touch the variable "status" beyond this point :-)
2897 */
2898
2899 for (i -= 1 ; i >= 0; i--) {
2900 if (streams[i] == NULL) {
2901 continue;
2902 }
2903
2904 DEBUG(10, ("Closing stream # %d, %s\n", i,
2905 fsp_str_dbg(streams[i])));
2906 close_file(NULL, streams[i], NORMAL_CLOSE);
2907 }
2908
2909 fail:
2910 TALLOC_FREE(frame);
2911 return status;
2912 }
2913
2914 /*
2915 * Wrapper around open_file_ntcreate and open_directory
2916 */
2917
2918 static NTSTATUS create_file_unixpath(connection_struct *conn,
2919 struct smb_request *req,
2920 struct smb_filename *smb_fname,
2921 uint32_t access_mask,
2922 uint32_t share_access,
2923 uint32_t create_disposition,
2924 uint32_t create_options,
2925 uint32_t file_attributes,
2926 uint32_t oplock_request,
2927 uint64_t allocation_size,
2928 uint32_t private_flags,
2929 struct security_descriptor *sd,
2930 struct ea_list *ea_list,
2931
2932 files_struct **result,
2933 int *pinfo)
2934 {
2935 int info = FILE_WAS_OPENED;
2936 files_struct *base_fsp = NULL;
2937 files_struct *fsp = NULL;
2938 NTSTATUS status;
2939
2940 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
2941 "file_attributes = 0x%x, share_access = 0x%x, "
2942 "create_disposition = 0x%x create_options = 0x%x "
2943 "oplock_request = 0x%x private_flags = 0x%x "
2944 "ea_list = 0x%p, sd = 0x%p, "
2945 "fname = %s\n",
2946 (unsigned int)access_mask,
2947 (unsigned int)file_attributes,
2948 (unsigned int)share_access,
2949 (unsigned int)create_disposition,
2950 (unsigned int)create_options,
2951 (unsigned int)oplock_request,
2952 (unsigned int)private_flags,
2953 ea_list, sd, smb_fname_str_dbg(smb_fname)));
2954
2955 if (create_options & FILE_OPEN_BY_FILE_ID) {
2956 status = NT_STATUS_NOT_SUPPORTED;
2957 goto fail;
2958 }
2959
2960 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
2961 status = NT_STATUS_INVALID_PARAMETER;
2962 goto fail;
2963 }
2964
2965 if (req == NULL) {
2966 oplock_request |= INTERNAL_OPEN_ONLY;
2967 }
2968
2969 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2970 && (access_mask & DELETE_ACCESS)
2971 && !is_ntfs_stream_smb_fname(smb_fname)) {
2972 /*
2973 * We can't open a file with DELETE access if any of the
2974 * streams is open without FILE_SHARE_DELETE
2975 */
2976 status = open_streams_for_delete(conn, smb_fname->base_name);
2977
2978 if (!NT_STATUS_IS_OK(status)) {
2979 goto fail;
2980 }
2981 }
2982
2983 /* This is the correct thing to do (check every time) but can_delete
2984 * is expensive (it may have to read the parent directory
2985 * permissions). So for now we're not doing it unless we have a strong
2986 * hint the client is really going to delete this file. If the client
2987 * is forcing FILE_CREATE let the filesystem take care of the
2988 * permissions. */
2989
2990 /* Setting FILE_SHARE_DELETE is the hint. */
2991
2992 if (lp_acl_check_permissions(SNUM(conn))
2993 && (create_disposition != FILE_CREATE)
2994 && (share_access & FILE_SHARE_DELETE)
2995 && (access_mask & DELETE_ACCESS)
2996 && (!(can_delete_file_in_directory(conn, smb_fname) ||
2997 can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
2998 status = NT_STATUS_ACCESS_DENIED;
2999 DEBUG(10,("create_file_unixpath: open file %s "
3000 "for delete ACCESS_DENIED\n",
3001 smb_fname_str_dbg(smb_fname)));
3002 goto fail;
3003 }
3004
3005 #if 0
3006 /* We need to support SeSecurityPrivilege for this. */
3007 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3008 !user_has_privileges(current_user.nt_user_token,
3009 &se_security)) {
3010 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3011 goto fail;
3012 }
3013 #else
3014 /* We need to support SeSecurityPrivilege for this. */
3015 if (access_mask & SEC_FLAG_SYSTEM_SECURITY) {
3016 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3017 goto fail;
3018 }
3019 /* Don't allow a SACL set from an NTtrans create until we
3020 * support SeSecurityPrivilege. */
3021 if (!VALID_STAT(smb_fname->st) &&
3022 lp_nt_acl_support(SNUM(conn)) &&
3023 sd && (sd->sacl != NULL)) {
3024 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3025 goto fail;
3026 }
3027 #endif
3028
3029 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3030 && is_ntfs_stream_smb_fname(smb_fname)
3031 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3032 uint32 base_create_disposition;
3033 struct smb_filename *smb_fname_base = NULL;
3034
3035 if (create_options & FILE_DIRECTORY_FILE) {
3036 status = NT_STATUS_NOT_A_DIRECTORY;
3037 goto fail;
3038 }
3039
3040 switch (create_disposition) {
3041 case FILE_OPEN:
3042 base_create_disposition = FILE_OPEN;
3043 break;
3044 default:
3045 base_create_disposition = FILE_OPEN_IF;
3046 break;
3047 }
3048
3049 /* Create an smb_filename with stream_name == NULL. */
3050 status = create_synthetic_smb_fname(talloc_tos(),
3051 smb_fname->base_name,
3052 NULL, NULL,
3053 &smb_fname_base);
3054 if (!NT_STATUS_IS_OK(status)) {
3055 goto fail;
3056 }
3057
3058 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3059 DEBUG(10, ("Unable to stat stream: %s\n",
3060 smb_fname_str_dbg(smb_fname_base)));
3061 }
3062
3063 /* Open the base file. */
3064 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3065 FILE_SHARE_READ
3066 | FILE_SHARE_WRITE
3067 | FILE_SHARE_DELETE,
3068 base_create_disposition,
3069 0, 0, 0, 0, 0, NULL, NULL,
3070 &base_fsp, NULL);
3071 TALLOC_FREE(smb_fname_base);
3072
3073 if (!NT_STATUS_IS_OK(status)) {
3074 DEBUG(10, ("create_file_unixpath for base %s failed: "
3075 "%s\n", smb_fname->base_name,
3076 nt_errstr(status)));
3077 goto fail;
3078 }
3079 /* we don't need to low level fd */
3080 fd_close(base_fsp);
3081 }
3082
3083 /*
3084 * If it's a request for a directory open, deal with it separately.
3085 */
3086
3087 if (create_options & FILE_DIRECTORY_FILE) {
3088
3089 if (create_options & FILE_NON_DIRECTORY_FILE) {
3090 status = NT_STATUS_INVALID_PARAMETER;
3091 goto fail;
3092 }
3093
3094 /* Can't open a temp directory. IFS kit test. */
3095 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3096 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3097 status = NT_STATUS_INVALID_PARAMETER;
3098 goto fail;
3099 }
3100
3101 /*
3102 * We will get a create directory here if the Win32
3103 * app specified a security descriptor in the
3104 * CreateDirectory() call.
3105 */
3106
3107 oplock_request = 0;
3108 status = open_directory(
3109 conn, req, smb_fname, access_mask, share_access,
3110 create_disposition, create_options, file_attributes,
3111 &info, &fsp);
3112 } else {
3113
3114 /*
3115 * Ordinary file case.
3116 */
3117
3118 status = file_new(req, conn, &fsp);
3119 if(!NT_STATUS_IS_OK(status)) {
3120 goto fail;
3121 }
3122
3123 status = fsp_set_smb_fname(fsp, smb_fname);
3124 if (!NT_STATUS_IS_OK(status)) {
3125 goto fail;
3126 }
3127
3128 /*
3129 * We're opening the stream element of a base_fsp
3130 * we already opened. Set up the base_fsp pointer.
3131 */
3132 if (base_fsp) {
3133 fsp->base_fsp = base_fsp;
3134 }
3135
3136 status = open_file_ntcreate(conn,
3137 req,
3138 access_mask,
3139 share_access,
3140 create_disposition,
3141 create_options,
3142 file_attributes,
3143 oplock_request,
3144 private_flags,
3145 &info,
3146 fsp);
3147
3148 if(!NT_STATUS_IS_OK(status)) {
3149 file_free(req, fsp);
3150 fsp = NULL;
3151 }
3152
3153 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3154
3155 /* A stream open never opens a directory */
3156
3157 if (base_fsp) {
3158 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3159 goto fail;
3160 }
3161
3162 /*
3163 * Fail the open if it was explicitly a non-directory
3164 * file.
3165 */
3166
3167 if (create_options & FILE_NON_DIRECTORY_FILE) {
3168 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3169 goto fail;
3170 }
3171
3172 oplock_request = 0;
3173 status = open_directory(
3174 conn, req, smb_fname, access_mask,
3175 share_access, create_disposition,
3176 create_options, file_attributes,
3177 &info, &fsp);
3178 }
3179 }
3180
3181 if (!NT_STATUS_IS_OK(status)) {
3182 goto fail;
3183 }
3184
3185 fsp->base_fsp = base_fsp;
3186
3187 /*
3188 * According to the MS documentation, the only time the security
3189 * descriptor is applied to the opened file is iff we *created* the
3190 * file; an existing file stays the same.
3191 *
3192 * Also, it seems (from observation) that you can open the file with
3193 * any access mask but you can still write the sd. We need to override
3194 * the granted access before we call set_sd
3195 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3196 */
3197
3198 if ((sd != NULL) && (info == FILE_WAS_CREATED)
3199 && lp_nt_acl_support(SNUM(conn))) {
3200
3201 uint32_t sec_info_sent;
3202 uint32_t saved_access_mask = fsp->access_mask;
3203
3204 sec_info_sent = get_sec_info(sd);
3205
3206 fsp->access_mask = FILE_GENERIC_ALL;
3207
3208 /* Convert all the generic bits. */
3209 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3210 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3211
3212 if (sec_info_sent & (SECINFO_OWNER|
3213 SECINFO_GROUP|
3214 DACL_SECURITY_INFORMATION|
3215 SECINFO_SACL)) {
3216 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3217 }
3218
3219 fsp->access_mask = saved_access_mask;
3220
3221 if (!NT_STATUS_IS_OK(status)) {
3222 goto fail;
3223 }
3224 }
3225
3226 if ((ea_list != NULL) &&
3227 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3228 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3229 if (!NT_STATUS_IS_OK(status)) {
3230 goto fail;
3231 }
3232 }
3233
3234 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3235 status = NT_STATUS_ACCESS_DENIED;
3236 goto fail;
3237 }
3238
3239 /* Save the requested allocation size. */
3240 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3241 if (allocation_size
3242 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3243 fsp->initial_allocation_size = smb_roundup(
3244 fsp->conn, allocation_size);
3245 if (fsp->is_directory) {
3246 /* Can't set allocation size on a directory. */
3247 status = NT_STATUS_ACCESS_DENIED;
3248 goto fail;
3249 }
3250 if (vfs_allocate_file_space(
3251 fsp, fsp->initial_allocation_size) == -1) {
3252 status = NT_STATUS_DISK_FULL;
3253 goto fail;
3254 }
3255 } else {
3256 fsp->initial_allocation_size = smb_roundup(
3257 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3258 }
3259 }
3260
3261 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3262
3263 *result = fsp;
3264 if (pinfo != NULL) {
3265 *pinfo = info;
3266 }
3267
3268 smb_fname->st = fsp->fsp_name->st;
3269
3270 return NT_STATUS_OK;
3271
3272 fail:
3273 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3274
3275 if (fsp != NULL) {
3276 if (base_fsp && fsp->base_fsp == base_fsp) {
3277 /*
3278 * The close_file below will close
3279 * fsp->base_fsp.
3280 */
3281 base_fsp = NULL;
3282 }
3283 close_file(req, fsp, ERROR_CLOSE);
3284 fsp = NULL;
3285 }
3286 if (base_fsp != NULL) {
3287 close_file(req, base_fsp, ERROR_CLOSE);
3288 base_fsp = NULL;
3289 }
3290 return status;
3291 }
3292
3293 /*
3294 * Calculate the full path name given a relative fid.
3295 */
3296 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3297 struct smb_request *req,
3298 uint16_t root_dir_fid,
3299 struct smb_filename *smb_fname)
3300 {
3301 files_struct *dir_fsp;
3302 char *parent_fname = NULL;
3303 char *new_base_name = NULL;
3304 NTSTATUS status;
3305
3306 if (root_dir_fid == 0 || !smb_fname) {
3307 status = NT_STATUS_INTERNAL_ERROR;
3308 goto out;
3309 }
3310
3311 dir_fsp = file_fsp(req, root_dir_fid);
3312
3313 if (dir_fsp == NULL) {
3314 status = NT_STATUS_INVALID_HANDLE;
3315 goto out;
3316 }
3317
3318 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3319 status = NT_STATUS_INVALID_HANDLE;
3320 goto out;
3321 }
3322
3323 if (!dir_fsp->is_directory) {
3324
3325 /*
3326 * Check to see if this is a mac fork of some kind.
3327 */
3328
3329 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3330 is_ntfs_stream_smb_fname(smb_fname)) {
3331 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3332 goto out;
3333 }
3334
3335 /*
3336 we need to handle the case when we get a
3337 relative open relative to a file and the
3338 pathname is blank - this is a reopen!
3339 (hint from demyn plantenberg)
3340 */
3341
3342 status = NT_STATUS_INVALID_HANDLE;
3343 goto out;
3344 }
3345
3346 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3347 /*
3348 * We're at the toplevel dir, the final file name
3349 * must not contain ./, as this is filtered out
3350 * normally by srvstr_get_path and unix_convert
3351 * explicitly rejects paths containing ./.
3352 */
3353 parent_fname = talloc_strdup(talloc_tos(), "");
3354 if (parent_fname == NULL) {
3355 status = NT_STATUS_NO_MEMORY;
3356 goto out;
3357 }
3358 } else {
3359 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3360
3361 /*
3362 * Copy in the base directory name.
3363 */
3364
3365 parent_fname = TALLOC_ARRAY(talloc_tos(), char,
3366 dir_name_len+2);
3367 if (parent_fname == NULL) {
3368 status = NT_STATUS_NO_MEMORY;
3369 goto out;
3370 }
3371 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3372 dir_name_len+1);
3373
3374 /*
3375 * Ensure it ends in a '/'.
3376 * We used TALLOC_SIZE +2 to add space for the '/'.
3377 */
3378
3379 if(dir_name_len
3380 && (parent_fname[dir_name_len-1] != '\\')
3381 && (parent_fname[dir_name_len-1] != '/')) {
3382 parent_fname[dir_name_len] = '/';
3383 parent_fname[dir_name_len+1] = '\0';
3384 }
3385 }
3386
3387 new_base_name = talloc_asprintf(smb_fname, "%s%s", parent_fname,
3388 smb_fname->base_name);
3389 if (new_base_name == NULL) {
3390 status = NT_STATUS_NO_MEMORY;
3391 goto out;
3392 }
3393
3394 TALLOC_FREE(smb_fname->base_name);
3395 smb_fname->base_name = new_base_name;
3396 status = NT_STATUS_OK;
3397
3398 out:
3399 TALLOC_FREE(parent_fname);
3400 return status;
3401 }
3402
3403 NTSTATUS create_file_default(connection_struct *conn,
3404 struct smb_request *req,
3405 uint16_t root_dir_fid,
3406 struct smb_filename *smb_fname,
3407 uint32_t access_mask,
3408 uint32_t share_access,
3409 uint32_t create_disposition,
3410 uint32_t create_options,
3411 uint32_t file_attributes,
3412 uint32_t oplock_request,
3413 uint64_t allocation_size,
3414 uint32_t private_flags,
3415 struct security_descriptor *sd,
3416 struct ea_list *ea_list,
3417 files_struct **result,
3418 int *pinfo)
3419 {
3420 int info = FILE_WAS_OPENED;
3421 files_struct *fsp = NULL;
3422 NTSTATUS status;
3423 bool stream_name = false;
3424
3425 DEBUG(10,("create_file: access_mask = 0x%x "
3426 "file_attributes = 0x%x, share_access = 0x%x, "
3427 "create_disposition = 0x%x create_options = 0x%x "
3428 "oplock_request = 0x%x "
3429 "private_flags = 0x%x "
3430 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3431 "fname = %s\n",
3432 (unsigned int)access_mask,
3433 (unsigned int)file_attributes,
3434 (unsigned int)share_access,
3435 (unsigned int)create_disposition,
3436 (unsigned int)create_options,
3437 (unsigned int)oplock_request,
3438 (unsigned int)private_flags,
3439 (unsigned int)root_dir_fid,
3440 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3441
3442 /*
3443 * Calculate the filename from the root_dir_if if necessary.
3444 */
3445
3446 if (root_dir_fid != 0) {
3447 status = get_relative_fid_filename(conn, req, root_dir_fid,
3448 smb_fname);
3449 if (!NT_STATUS_IS_OK(status)) {
3450 goto fail;
3451 }
3452 }
3453
3454 /*
3455 * Check to see if this is a mac fork of some kind.
3456 */
3457
3458 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3459 if (stream_name) {
3460 enum FAKE_FILE_TYPE fake_file_type;
3461
3462 fake_file_type = is_fake_file(smb_fname);
3463
3464 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3465
3466 /*
3467 * Here we go! support for changing the disk quotas
3468 * --metze
3469 *
3470 * We need to fake up to open this MAGIC QUOTA file
3471 * and return a valid FID.
3472 *
3473 * w2k close this file directly after openening xp
3474 * also tries a QUERY_FILE_INFO on the file and then
3475 * close it
3476 */
3477 status = open_fake_file(req, conn, req->vuid,
3478 fake_file_type, smb_fname,
3479 access_mask, &fsp);
3480 if (!NT_STATUS_IS_OK(status)) {
3481 goto fail;
3482 }
3483
3484 ZERO_STRUCT(smb_fname->st);
3485 goto done;
3486 }
3487
3488 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3489 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3490 goto fail;
3491 }
3492 }
3493
3494 /* All file access must go through check_name() */
3495
3496 status = check_name(conn, smb_fname->base_name);
3497 if (!NT_STATUS_IS_OK(status)) {
3498 goto fail;
3499 }
3500
3501 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3502 int ret;
3503 smb_fname->stream_name = NULL;
3504 /* We have to handle this error here. */
3505 if (create_options & FILE_DIRECTORY_FILE) {
3506 status = NT_STATUS_NOT_A_DIRECTORY;
3507 goto fail;
3508 }
3509 if (lp_posix_pathnames()) {
3510 ret = SMB_VFS_LSTAT(conn, smb_fname);
3511 } else {
3512 ret = SMB_VFS_STAT(conn, smb_fname);
3513 }
3514
3515 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3516 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3517 goto fail;
3518 }
3519 }
3520
3521 status = create_file_unixpath(
3522 conn, req, smb_fname, access_mask, share_access,
3523 create_disposition, create_options, file_attributes,
3524 oplock_request, allocation_size, private_flags,
3525 sd, ea_list,
3526 &fsp, &info);
3527
3528 if (!NT_STATUS_IS_OK(status)) {
3529 goto fail;
3530 }
3531
3532 done:
3533 DEBUG(10, ("create_file: info=%d\n", info));
3534
3535 *result = fsp;
3536 if (pinfo != NULL) {
3537 *pinfo = info;
3538 }
3539 return NT_STATUS_OK;
3540
3541 fail:
3542 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3543
3544 if (fsp != NULL) {
3545 close_file(req, fsp, ERROR_CLOSE);
3546 fsp = NULL;
3547 }
3548 return status;
3549 }