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Part 1 of bugfix for #8211 - "inherit owner = yes" doesn't interact correctly with...
[Samba.git] / source3 / smbd / open.c
blobe8d1a1bd4073f13cdd07abc7cef7c0d813531d1a
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
25 extern struct current_user current_user;
26 extern const struct generic_mapping file_generic_mapping;
27
28 struct deferred_open_record {
29 bool delayed_for_oplocks;
30 struct file_id id;
31 };
32
33 static NTSTATUS create_file_unixpath(connection_struct *conn,
34 struct smb_request *req,
35 struct smb_filename *smb_fname,
36 uint32_t access_mask,
37 uint32_t share_access,
38 uint32_t create_disposition,
39 uint32_t create_options,
40 uint32_t file_attributes,
41 uint32_t oplock_request,
42 uint64_t allocation_size,
43 struct security_descriptor *sd,
44 struct ea_list *ea_list,
45
46 files_struct **result,
47 int *pinfo);
48
49 /****************************************************************************
50 SMB1 file varient of se_access_check. Never test FILE_READ_ATTRIBUTES.
51 ****************************************************************************/
52
53 NTSTATUS smb1_file_se_access_check(connection_struct *conn,
54 const struct security_descriptor *sd,
55 const NT_USER_TOKEN *token,
56 uint32_t access_desired,
57 uint32_t *access_granted)
58 {
59 *access_granted = 0;
60
61 if (conn->server_info->utok.uid == 0 || conn->admin_user) {
62 /* I'm sorry sir, I didn't know you were root... */
63 *access_granted = access_desired;
64 if (access_desired & SEC_FLAG_MAXIMUM_ALLOWED) {
65 *access_granted |= FILE_GENERIC_ALL;
66 }
67 return NT_STATUS_OK;
68 }
69
70 return se_access_check(sd,
71 token,
72 (access_desired & ~FILE_READ_ATTRIBUTES),
73 access_granted);
74 }
75
76 /****************************************************************************
77 Check if we have open rights.
78 ****************************************************************************/
79
80 NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
81 const struct smb_filename *smb_fname,
82 uint32_t access_mask,
83 uint32_t *access_granted)
84 {
85 /* Check if we have rights to open. */
86 NTSTATUS status;
87 struct security_descriptor *sd = NULL;
88
89 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
90 (OWNER_SECURITY_INFORMATION |
91 GROUP_SECURITY_INFORMATION |
92 DACL_SECURITY_INFORMATION),&sd);
93
94 if (!NT_STATUS_IS_OK(status)) {
95 DEBUG(10, ("smbd_check_open_rights: Could not get acl "
96 "on %s: %s\n",
97 smb_fname_str_dbg(smb_fname),
98 nt_errstr(status)));
99 return status;
100 }
101
102 status = smb1_file_se_access_check(conn,
103 sd,
104 conn->server_info->ptok,
105 access_mask,
106 access_granted);
107
108 DEBUG(10,("smbd_check_open_rights: file %s requesting "
109 "0x%x returning 0x%x (%s)\n",
110 smb_fname_str_dbg(smb_fname),
111 (unsigned int)access_mask,
112 (unsigned int)*access_granted,
113 nt_errstr(status) ));
114
115 if (!NT_STATUS_IS_OK(status)) {
116 if (DEBUGLEVEL >= 10) {
117 DEBUG(10,("smbd_check_open_rights: acl for %s is:\n",
118 smb_fname_str_dbg(smb_fname) ));
119 NDR_PRINT_DEBUG(security_descriptor, sd);
120 }
121 }
122
123 TALLOC_FREE(sd);
124
125 return status;
126 }
127
128 /****************************************************************************
129 fd support routines - attempt to do a dos_open.
130 ****************************************************************************/
131
132 static NTSTATUS fd_open(struct connection_struct *conn,
133 files_struct *fsp,
134 int flags,
135 mode_t mode)
136 {
137 struct smb_filename *smb_fname = fsp->fsp_name;
138 NTSTATUS status = NT_STATUS_OK;
139
140 #ifdef O_NOFOLLOW
141 /*
142 * Never follow symlinks on a POSIX client. The
143 * client should be doing this.
144 */
145
146 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
147 flags |= O_NOFOLLOW;
148 }
149 #endif
150
151 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
152 if (fsp->fh->fd == -1) {
153 status = map_nt_error_from_unix(errno);
154 if (errno == EMFILE) {
155 static time_t last_warned = 0L;
156
157 if (time((time_t *) NULL) > last_warned) {
158 DEBUG(0,("Too many open files, unable "
159 "to open more! smbd's max "
160 "open files = %d\n",
161 lp_max_open_files()));
162 last_warned = time((time_t *) NULL);
163 }
164 }
165
166 }
167
168 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
169 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
170 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
171
172 return status;
173 }
174
175 /****************************************************************************
176 Close the file associated with a fsp.
177 ****************************************************************************/
178
179 NTSTATUS fd_close(files_struct *fsp)
180 {
181 int ret;
182
183 if (fsp->fh->fd == -1) {
184 return NT_STATUS_OK; /* What we used to call a stat open. */
185 }
186 if (fsp->fh->ref_count > 1) {
187 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
188 }
189
190 ret = SMB_VFS_CLOSE(fsp);
191 fsp->fh->fd = -1;
192 if (ret == -1) {
193 return map_nt_error_from_unix(errno);
194 }
195 return NT_STATUS_OK;
196 }
197
198 /****************************************************************************
199 Change the ownership of a file to that of the parent directory.
200 Do this by fd if possible.
201 ****************************************************************************/
202
203 void change_file_owner_to_parent(connection_struct *conn,
204 const char *inherit_from_dir,
205 files_struct *fsp)
206 {
207 struct smb_filename *smb_fname_parent = NULL;
208 NTSTATUS status;
209 int ret;
210
211 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
212 NULL, NULL, &smb_fname_parent);
213 if (!NT_STATUS_IS_OK(status)) {
214 return;
215 }
216
217 ret = SMB_VFS_STAT(conn, smb_fname_parent);
218 if (ret == -1) {
219 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
220 "directory %s. Error was %s\n",
221 smb_fname_str_dbg(smb_fname_parent),
222 strerror(errno)));
223 return;
224 }
225
226 become_root();
227 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
228 unbecome_root();
229 if (ret == -1) {
230 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
231 "file %s to parent directory uid %u. Error "
232 "was %s\n", fsp_str_dbg(fsp),
233 (unsigned int)smb_fname_parent->st.st_ex_uid,
234 strerror(errno) ));
235 }
236
237 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
238 "parent directory uid %u.\n", fsp_str_dbg(fsp),
239 (unsigned int)smb_fname_parent->st.st_ex_uid));
240
241 TALLOC_FREE(smb_fname_parent);
242 }
243
244 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
245 const char *inherit_from_dir,
246 const char *fname,
247 SMB_STRUCT_STAT *psbuf)
248 {
249 struct smb_filename *smb_fname_parent = NULL;
250 struct smb_filename *smb_fname_cwd = NULL;
251 char *saved_dir = NULL;
252 TALLOC_CTX *ctx = talloc_tos();
253 NTSTATUS status = NT_STATUS_OK;
254 int ret;
255
256 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
257 &smb_fname_parent);
258 if (!NT_STATUS_IS_OK(status)) {
259 return status;
260 }
261
262 ret = SMB_VFS_STAT(conn, smb_fname_parent);
263 if (ret == -1) {
264 status = map_nt_error_from_unix(errno);
265 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
266 "directory %s. Error was %s\n",
267 smb_fname_str_dbg(smb_fname_parent),
268 strerror(errno)));
269 goto out;
270 }
271
272 /* We've already done an lstat into psbuf, and we know it's a
273 directory. If we can cd into the directory and the dev/ino
274 are the same then we can safely chown without races as
275 we're locking the directory in place by being in it. This
276 should work on any UNIX (thanks tridge :-). JRA.
277 */
278
279 saved_dir = vfs_GetWd(ctx,conn);
280 if (!saved_dir) {
281 status = map_nt_error_from_unix(errno);
282 DEBUG(0,("change_dir_owner_to_parent: failed to get "
283 "current working directory. Error was %s\n",
284 strerror(errno)));
285 goto out;
286 }
287
288 /* Chdir into the new path. */
289 if (vfs_ChDir(conn, fname) == -1) {
290 status = map_nt_error_from_unix(errno);
291 DEBUG(0,("change_dir_owner_to_parent: failed to change "
292 "current working directory to %s. Error "
293 "was %s\n", fname, strerror(errno) ));
294 goto chdir;
295 }
296
297 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
298 &smb_fname_cwd);
299 if (!NT_STATUS_IS_OK(status)) {
300 return status;
301 }
302
303 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
304 if (ret == -1) {
305 status = map_nt_error_from_unix(errno);
306 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
307 "directory '.' (%s) Error was %s\n",
308 fname, strerror(errno)));
309 goto chdir;
310 }
311
312 /* Ensure we're pointing at the same place. */
313 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
314 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino ||
315 smb_fname_cwd->st.st_ex_mode != psbuf->st_ex_mode ) {
316 DEBUG(0,("change_dir_owner_to_parent: "
317 "device/inode/mode on directory %s changed. "
318 "Refusing to chown !\n", fname ));
319 status = NT_STATUS_ACCESS_DENIED;
320 goto chdir;
321 }
322
323 become_root();
324 ret = SMB_VFS_CHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
325 (gid_t)-1);
326 unbecome_root();
327 if (ret == -1) {
328 status = map_nt_error_from_unix(errno);
329 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
330 "directory %s to parent directory uid %u. "
331 "Error was %s\n", fname,
332 (unsigned int)smb_fname_parent->st.st_ex_uid,
333 strerror(errno) ));
334 goto chdir;
335 }
336
337 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
338 "directory %s to parent directory uid %u.\n",
339 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
340
341 /* Ensure the uid entry is updated. */
342 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
343
344 chdir:
345 vfs_ChDir(conn,saved_dir);
346 out:
347 TALLOC_FREE(smb_fname_parent);
348 TALLOC_FREE(smb_fname_cwd);
349 return status;
350 }
351
352 /****************************************************************************
353 Open a file.
354 ****************************************************************************/
355
356 static NTSTATUS open_file(files_struct *fsp,
357 connection_struct *conn,
358 struct smb_request *req,
359 const char *parent_dir,
360 int flags,
361 mode_t unx_mode,
362 uint32 access_mask, /* client requested access mask. */
363 uint32 open_access_mask) /* what we're actually using in the open. */
364 {
365 struct smb_filename *smb_fname = fsp->fsp_name;
366 NTSTATUS status = NT_STATUS_OK;
367 int accmode = (flags & O_ACCMODE);
368 int local_flags = flags;
369 bool file_existed = VALID_STAT(fsp->fsp_name->st);
370
371 fsp->fh->fd = -1;
372 errno = EPERM;
373
374 /* Check permissions */
375
376 /*
377 * This code was changed after seeing a client open request
378 * containing the open mode of (DENY_WRITE/read-only) with
379 * the 'create if not exist' bit set. The previous code
380 * would fail to open the file read only on a read-only share
381 * as it was checking the flags parameter directly against O_RDONLY,
382 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
383 * JRA.
384 */
385
386 if (!CAN_WRITE(conn)) {
387 /* It's a read-only share - fail if we wanted to write. */
388 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
389 DEBUG(3,("Permission denied opening %s\n",
390 smb_fname_str_dbg(smb_fname)));
391 return NT_STATUS_ACCESS_DENIED;
392 } else if(flags & O_CREAT) {
393 /* We don't want to write - but we must make sure that
394 O_CREAT doesn't create the file if we have write
395 access into the directory.
396 */
397 flags &= ~(O_CREAT|O_EXCL);
398 local_flags &= ~(O_CREAT|O_EXCL);
399 }
400 }
401
402 /*
403 * This little piece of insanity is inspired by the
404 * fact that an NT client can open a file for O_RDONLY,
405 * but set the create disposition to FILE_EXISTS_TRUNCATE.
406 * If the client *can* write to the file, then it expects to
407 * truncate the file, even though it is opening for readonly.
408 * Quicken uses this stupid trick in backup file creation...
409 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
410 * for helping track this one down. It didn't bite us in 2.0.x
411 * as we always opened files read-write in that release. JRA.
412 */
413
414 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
415 DEBUG(10,("open_file: truncate requested on read-only open "
416 "for file %s\n", smb_fname_str_dbg(smb_fname)));
417 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
418 }
419
420 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
421 (!file_existed && (local_flags & O_CREAT)) ||
422 ((local_flags & O_TRUNC) == O_TRUNC) ) {
423 const char *wild;
424
425 /*
426 * We can't actually truncate here as the file may be locked.
427 * open_file_ntcreate will take care of the truncate later. JRA.
428 */
429
430 local_flags &= ~O_TRUNC;
431
432 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
433 /*
434 * We would block on opening a FIFO with no one else on the
435 * other end. Do what we used to do and add O_NONBLOCK to the
436 * open flags. JRA.
437 */
438
439 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
440 local_flags |= O_NONBLOCK;
441 }
442 #endif
443
444 /* Don't create files with Microsoft wildcard characters. */
445 if (fsp->base_fsp) {
446 /*
447 * wildcard characters are allowed in stream names
448 * only test the basefilename
449 */
450 wild = fsp->base_fsp->fsp_name->base_name;
451 } else {
452 wild = smb_fname->base_name;
453 }
454 if ((local_flags & O_CREAT) && !file_existed &&
455 ms_has_wild(wild)) {
456 return NT_STATUS_OBJECT_NAME_INVALID;
457 }
458
459 /* Actually do the open */
460 status = fd_open(conn, fsp, local_flags, unx_mode);
461 if (!NT_STATUS_IS_OK(status)) {
462 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
463 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
464 nt_errstr(status),local_flags,flags));
465 return status;
466 }
467
468 if ((local_flags & O_CREAT) && !file_existed) {
469
470 /* Inherit the ACL if required */
471 if (lp_inherit_perms(SNUM(conn))) {
472 inherit_access_posix_acl(conn, parent_dir,
473 smb_fname->base_name,
474 unx_mode);
475 }
476
477 /* Change the owner if required. */
478 if (lp_inherit_owner(SNUM(conn))) {
479 change_file_owner_to_parent(conn, parent_dir,
480 fsp);
481 }
482
483 notify_fname(conn, NOTIFY_ACTION_ADDED,
484 FILE_NOTIFY_CHANGE_FILE_NAME,
485 smb_fname->base_name);
486 }
487
488 } else {
489 fsp->fh->fd = -1; /* What we used to call a stat open. */
490 if (file_existed) {
491 uint32_t access_granted = 0;
492
493 status = smbd_check_open_rights(conn,
494 smb_fname,
495 access_mask,
496 &access_granted);
497 if (!NT_STATUS_IS_OK(status)) {
498 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
499 /*
500 * On NT_STATUS_ACCESS_DENIED, access_granted
501 * contains the denied bits.
502 */
503
504 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
505 (access_granted & FILE_WRITE_ATTRIBUTES) &&
506 (lp_map_readonly(SNUM(conn)) ||
507 lp_map_archive(SNUM(conn)) ||
508 lp_map_hidden(SNUM(conn)) ||
509 lp_map_system(SNUM(conn)))) {
510 access_granted &= ~FILE_WRITE_ATTRIBUTES;
511
512 DEBUG(10,("open_file: "
513 "overrode "
514 "FILE_WRITE_"
515 "ATTRIBUTES "
516 "on file %s\n",
517 smb_fname_str_dbg(
518 smb_fname)));
519 }
520
521 if ((access_mask & DELETE_ACCESS) &&
522 (access_granted & DELETE_ACCESS) &&
523 can_delete_file_in_directory(conn,
524 smb_fname)) {
525 /* Were we trying to do a stat open
526 * for delete and didn't get DELETE
527 * access (only) ? Check if the
528 * directory allows DELETE_CHILD.
529 * See here:
530 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
531 * for details. */
532
533 access_granted &= ~DELETE_ACCESS;
534
535 DEBUG(10,("open_file: "
536 "overrode "
537 "DELETE_ACCESS on "
538 "file %s\n",
539 smb_fname_str_dbg(
540 smb_fname)));
541 }
542
543 if (access_granted != 0) {
544 DEBUG(10,("open_file: Access "
545 "denied on file "
546 "%s\n",
547 smb_fname_str_dbg(
548 smb_fname)));
549 return status;
550 }
551 } else if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
552 fsp->posix_open &&
553 S_ISLNK(smb_fname->st.st_ex_mode)) {
554 /* This is a POSIX stat open for delete
555 * or rename on a symlink that points
556 * nowhere. Allow. */
557 DEBUG(10,("open_file: allowing POSIX "
558 "open on bad symlink %s\n",
559 smb_fname_str_dbg(
560 smb_fname)));
561 } else {
562 DEBUG(10,("open_file: "
563 "smbd_check_open_rights on file "
564 "%s returned %s\n",
565 smb_fname_str_dbg(smb_fname),
566 nt_errstr(status) ));
567 return status;
568 }
569 }
570 }
571 }
572
573 if (!file_existed) {
574 int ret;
575
576 if (fsp->fh->fd == -1) {
577 ret = SMB_VFS_STAT(conn, smb_fname);
578 } else {
579 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
580 /* If we have an fd, this stat should succeed. */
581 if (ret == -1) {
582 DEBUG(0,("Error doing fstat on open file %s "
583 "(%s)\n",
584 smb_fname_str_dbg(smb_fname),
585 strerror(errno) ));
586 }
587 }
588
589 /* For a non-io open, this stat failing means file not found. JRA */
590 if (ret == -1) {
591 status = map_nt_error_from_unix(errno);
592 fd_close(fsp);
593 return status;
594 }
595 }
596
597 /*
598 * POSIX allows read-only opens of directories. We don't
599 * want to do this (we use a different code path for this)
600 * so catch a directory open and return an EISDIR. JRA.
601 */
602
603 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
604 fd_close(fsp);
605 errno = EISDIR;
606 return NT_STATUS_FILE_IS_A_DIRECTORY;
607 }
608
609 fsp->mode = smb_fname->st.st_ex_mode;
610 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
611 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
612 fsp->file_pid = req ? req->smbpid : 0;
613 fsp->can_lock = True;
614 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
615 if (!CAN_WRITE(conn)) {
616 fsp->can_write = False;
617 } else {
618 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
619 True : False;
620 }
621 fsp->print_file = False;
622 fsp->modified = False;
623 fsp->sent_oplock_break = NO_BREAK_SENT;
624 fsp->is_directory = False;
625 if (conn->aio_write_behind_list &&
626 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
627 conn->case_sensitive)) {
628 fsp->aio_write_behind = True;
629 }
630
631 fsp->wcp = NULL; /* Write cache pointer. */
632
633 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
634 conn->server_info->unix_name,
635 smb_fname_str_dbg(smb_fname),
636 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
637 conn->num_files_open));
638
639 errno = 0;
640 return NT_STATUS_OK;
641 }
642
643 /*******************************************************************
644 Return True if the filename is one of the special executable types.
645 ********************************************************************/
646
647 bool is_executable(const char *fname)
648 {
649 if ((fname = strrchr_m(fname,'.'))) {
650 if (strequal(fname,".com") ||
651 strequal(fname,".dll") ||
652 strequal(fname,".exe") ||
653 strequal(fname,".sym")) {
654 return True;
655 }
656 }
657 return False;
658 }
659
660 /****************************************************************************
661 Check if we can open a file with a share mode.
662 Returns True if conflict, False if not.
663 ****************************************************************************/
664
665 static bool share_conflict(struct share_mode_entry *entry,
666 uint32 access_mask,
667 uint32 share_access)
668 {
669 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
670 "entry->share_access = 0x%x, "
671 "entry->private_options = 0x%x\n",
672 (unsigned int)entry->access_mask,
673 (unsigned int)entry->share_access,
674 (unsigned int)entry->private_options));
675
676 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
677 (unsigned int)access_mask, (unsigned int)share_access));
678
679 if ((entry->access_mask & (FILE_WRITE_DATA|
680 FILE_APPEND_DATA|
681 FILE_READ_DATA|
682 FILE_EXECUTE|
683 DELETE_ACCESS)) == 0) {
684 DEBUG(10,("share_conflict: No conflict due to "
685 "entry->access_mask = 0x%x\n",
686 (unsigned int)entry->access_mask ));
687 return False;
688 }
689
690 if ((access_mask & (FILE_WRITE_DATA|
691 FILE_APPEND_DATA|
692 FILE_READ_DATA|
693 FILE_EXECUTE|
694 DELETE_ACCESS)) == 0) {
695 DEBUG(10,("share_conflict: No conflict due to "
696 "access_mask = 0x%x\n",
697 (unsigned int)access_mask ));
698 return False;
699 }
700
701 #if 1 /* JRA TEST - Superdebug. */
702 #define CHECK_MASK(num, am, right, sa, share) \
703 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
704 (unsigned int)(num), (unsigned int)(am), \
705 (unsigned int)(right), (unsigned int)(am)&(right) )); \
706 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
707 (unsigned int)(num), (unsigned int)(sa), \
708 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
709 if (((am) & (right)) && !((sa) & (share))) { \
710 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
711 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
712 (unsigned int)(share) )); \
713 return True; \
714 }
715 #else
716 #define CHECK_MASK(num, am, right, sa, share) \
717 if (((am) & (right)) && !((sa) & (share))) { \
718 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
719 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
720 (unsigned int)(share) )); \
721 return True; \
722 }
723 #endif
724
725 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
726 share_access, FILE_SHARE_WRITE);
727 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
728 entry->share_access, FILE_SHARE_WRITE);
729
730 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
731 share_access, FILE_SHARE_READ);
732 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
733 entry->share_access, FILE_SHARE_READ);
734
735 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
736 share_access, FILE_SHARE_DELETE);
737 CHECK_MASK(6, access_mask, DELETE_ACCESS,
738 entry->share_access, FILE_SHARE_DELETE);
739
740 DEBUG(10,("share_conflict: No conflict.\n"));
741 return False;
742 }
743
744 #if defined(DEVELOPER)
745 static void validate_my_share_entries(int num,
746 struct share_mode_entry *share_entry)
747 {
748 files_struct *fsp;
749
750 if (!procid_is_me(&share_entry->pid)) {
751 return;
752 }
753
754 if (is_deferred_open_entry(share_entry) &&
755 !open_was_deferred(share_entry->op_mid)) {
756 char *str = talloc_asprintf(talloc_tos(),
757 "Got a deferred entry without a request: "
758 "PANIC: %s\n",
759 share_mode_str(talloc_tos(), num, share_entry));
760 smb_panic(str);
761 }
762
763 if (!is_valid_share_mode_entry(share_entry)) {
764 return;
765 }
766
767 fsp = file_find_dif(share_entry->id,
768 share_entry->share_file_id);
769 if (!fsp) {
770 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
771 share_mode_str(talloc_tos(), num, share_entry) ));
772 smb_panic("validate_my_share_entries: Cannot match a "
773 "share entry with an open file\n");
774 }
775
776 if (is_deferred_open_entry(share_entry) ||
777 is_unused_share_mode_entry(share_entry)) {
778 goto panic;
779 }
780
781 if ((share_entry->op_type == NO_OPLOCK) &&
782 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
783 /* Someone has already written to it, but I haven't yet
784 * noticed */
785 return;
786 }
787
788 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
789 goto panic;
790 }
791
792 return;
793
794 panic:
795 {
796 char *str;
797 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
798 share_mode_str(talloc_tos(), num, share_entry) ));
799 str = talloc_asprintf(talloc_tos(),
800 "validate_my_share_entries: "
801 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
802 fsp->fsp_name->base_name,
803 (unsigned int)fsp->oplock_type,
804 (unsigned int)share_entry->op_type );
805 smb_panic(str);
806 }
807 }
808 #endif
809
810 bool is_stat_open(uint32 access_mask)
811 {
812 return (access_mask &&
813 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
814 FILE_WRITE_ATTRIBUTES))==0) &&
815 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
816 FILE_WRITE_ATTRIBUTES)) != 0));
817 }
818
819 /****************************************************************************
820 Deal with share modes
821 Invarient: Share mode must be locked on entry and exit.
822 Returns -1 on error, or number of share modes on success (may be zero).
823 ****************************************************************************/
824
825 static NTSTATUS open_mode_check(connection_struct *conn,
826 struct share_mode_lock *lck,
827 uint32 access_mask,
828 uint32 share_access,
829 uint32 create_options,
830 bool *file_existed)
831 {
832 int i;
833
834 if(lck->num_share_modes == 0) {
835 return NT_STATUS_OK;
836 }
837
838 *file_existed = True;
839
840 /* A delete on close prohibits everything */
841
842 if (lck->delete_on_close) {
843 return NT_STATUS_DELETE_PENDING;
844 }
845
846 if (is_stat_open(access_mask)) {
847 /* Stat open that doesn't trigger oplock breaks or share mode
848 * checks... ! JRA. */
849 return NT_STATUS_OK;
850 }
851
852 /*
853 * Check if the share modes will give us access.
854 */
855
856 #if defined(DEVELOPER)
857 for(i = 0; i < lck->num_share_modes; i++) {
858 validate_my_share_entries(i, &lck->share_modes[i]);
859 }
860 #endif
861
862 if (!lp_share_modes(SNUM(conn))) {
863 return NT_STATUS_OK;
864 }
865
866 /* Now we check the share modes, after any oplock breaks. */
867 for(i = 0; i < lck->num_share_modes; i++) {
868
869 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
870 continue;
871 }
872
873 /* someone else has a share lock on it, check to see if we can
874 * too */
875 if (share_conflict(&lck->share_modes[i],
876 access_mask, share_access)) {
877 return NT_STATUS_SHARING_VIOLATION;
878 }
879 }
880
881 return NT_STATUS_OK;
882 }
883
884 static bool is_delete_request(files_struct *fsp) {
885 return ((fsp->access_mask == DELETE_ACCESS) &&
886 (fsp->oplock_type == NO_OPLOCK));
887 }
888
889 /*
890 * Send a break message to the oplock holder and delay the open for
891 * our client.
892 */
893
894 static NTSTATUS send_break_message(files_struct *fsp,
895 struct share_mode_entry *exclusive,
896 uint16 mid,
897 int oplock_request)
898 {
899 NTSTATUS status;
900 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
901
902 DEBUG(10, ("Sending break request to PID %s\n",
903 procid_str_static(&exclusive->pid)));
904 exclusive->op_mid = mid;
905
906 /* Create the message. */
907 share_mode_entry_to_message(msg, exclusive);
908
909 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
910 don't want this set in the share mode struct pointed to by lck. */
911
912 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
913 SSVAL(msg,6,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 uint16 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=%d, exiting\n", req->mid));
1076 exit_server("attempt to defer a deferred request");
1077 }
1078 }
1079
1080 /* End paranoia check */
1081
1082 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1083 "open entry for mid %u\n",
1084 (unsigned int)request_time.tv_sec,
1085 (unsigned int)request_time.tv_usec,
1086 (unsigned int)req->mid));
1087
1088 if (!push_deferred_smb_message(req, request_time, timeout,
1089 (char *)state, sizeof(*state))) {
1090 exit_server("push_deferred_smb_message failed");
1091 }
1092 add_deferred_open(lck, req->mid, request_time, state->id);
1093 }
1094
1095
1096 /****************************************************************************
1097 On overwrite open ensure that the attributes match.
1098 ****************************************************************************/
1099
1100 bool open_match_attributes(connection_struct *conn,
1101 uint32 old_dos_attr,
1102 uint32 new_dos_attr,
1103 mode_t existing_unx_mode,
1104 mode_t new_unx_mode,
1105 mode_t *returned_unx_mode)
1106 {
1107 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1108
1109 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1110 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1111
1112 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1113 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1114 *returned_unx_mode = new_unx_mode;
1115 } else {
1116 *returned_unx_mode = (mode_t)0;
1117 }
1118
1119 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1120 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1121 "returned_unx_mode = 0%o\n",
1122 (unsigned int)old_dos_attr,
1123 (unsigned int)existing_unx_mode,
1124 (unsigned int)new_dos_attr,
1125 (unsigned int)*returned_unx_mode ));
1126
1127 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1128 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1129 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1130 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1131 return False;
1132 }
1133 }
1134 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1135 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1136 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1137 return False;
1138 }
1139 }
1140 return True;
1141 }
1142
1143 /****************************************************************************
1144 Special FCB or DOS processing in the case of a sharing violation.
1145 Try and find a duplicated file handle.
1146 ****************************************************************************/
1147
1148 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1149 connection_struct *conn,
1150 files_struct *fsp_to_dup_into,
1151 const struct smb_filename *smb_fname,
1152 struct file_id id,
1153 uint16 file_pid,
1154 uint16 vuid,
1155 uint32 access_mask,
1156 uint32 share_access,
1157 uint32 create_options)
1158 {
1159 files_struct *fsp;
1160
1161 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1162 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1163
1164 for(fsp = file_find_di_first(id); fsp;
1165 fsp = file_find_di_next(fsp)) {
1166
1167 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1168 "vuid = %u, file_pid = %u, private_options = 0x%x "
1169 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1170 fsp->fh->fd, (unsigned int)fsp->vuid,
1171 (unsigned int)fsp->file_pid,
1172 (unsigned int)fsp->fh->private_options,
1173 (unsigned int)fsp->access_mask ));
1174
1175 if (fsp->fh->fd != -1 &&
1176 fsp->vuid == vuid &&
1177 fsp->file_pid == file_pid &&
1178 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1179 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1180 (fsp->access_mask & FILE_WRITE_DATA) &&
1181 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1182 strequal(fsp->fsp_name->stream_name,
1183 smb_fname->stream_name)) {
1184 DEBUG(10,("fcb_or_dos_open: file match\n"));
1185 break;
1186 }
1187 }
1188
1189 if (!fsp) {
1190 return NT_STATUS_NOT_FOUND;
1191 }
1192
1193 /* quite an insane set of semantics ... */
1194 if (is_executable(smb_fname->base_name) &&
1195 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1196 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1197 return NT_STATUS_INVALID_PARAMETER;
1198 }
1199
1200 /* We need to duplicate this fsp. */
1201 return dup_file_fsp(req, fsp, access_mask, share_access,
1202 create_options, fsp_to_dup_into);
1203 }
1204
1205 /****************************************************************************
1206 Open a file with a share mode - old openX method - map into NTCreate.
1207 ****************************************************************************/
1208
1209 bool map_open_params_to_ntcreate(const struct smb_filename *smb_fname,
1210 int deny_mode, int open_func,
1211 uint32 *paccess_mask,
1212 uint32 *pshare_mode,
1213 uint32 *pcreate_disposition,
1214 uint32 *pcreate_options)
1215 {
1216 uint32 access_mask;
1217 uint32 share_mode;
1218 uint32 create_disposition;
1219 uint32 create_options = FILE_NON_DIRECTORY_FILE;
1220
1221 DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
1222 "open_func = 0x%x\n",
1223 smb_fname_str_dbg(smb_fname), (unsigned int)deny_mode,
1224 (unsigned int)open_func ));
1225
1226 /* Create the NT compatible access_mask. */
1227 switch (GET_OPENX_MODE(deny_mode)) {
1228 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
1229 case DOS_OPEN_RDONLY:
1230 access_mask = FILE_GENERIC_READ;
1231 break;
1232 case DOS_OPEN_WRONLY:
1233 access_mask = FILE_GENERIC_WRITE;
1234 break;
1235 case DOS_OPEN_RDWR:
1236 case DOS_OPEN_FCB:
1237 access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
1238 break;
1239 default:
1240 DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
1241 (unsigned int)GET_OPENX_MODE(deny_mode)));
1242 return False;
1243 }
1244
1245 /* Create the NT compatible create_disposition. */
1246 switch (open_func) {
1247 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
1248 create_disposition = FILE_CREATE;
1249 break;
1250
1251 case OPENX_FILE_EXISTS_OPEN:
1252 create_disposition = FILE_OPEN;
1253 break;
1254
1255 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
1256 create_disposition = FILE_OPEN_IF;
1257 break;
1258
1259 case OPENX_FILE_EXISTS_TRUNCATE:
1260 create_disposition = FILE_OVERWRITE;
1261 break;
1262
1263 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
1264 create_disposition = FILE_OVERWRITE_IF;
1265 break;
1266
1267 default:
1268 /* From samba4 - to be confirmed. */
1269 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
1270 create_disposition = FILE_CREATE;
1271 break;
1272 }
1273 DEBUG(10,("map_open_params_to_ntcreate: bad "
1274 "open_func 0x%x\n", (unsigned int)open_func));
1275 return False;
1276 }
1277
1278 /* Create the NT compatible share modes. */
1279 switch (GET_DENY_MODE(deny_mode)) {
1280 case DENY_ALL:
1281 share_mode = FILE_SHARE_NONE;
1282 break;
1283
1284 case DENY_WRITE:
1285 share_mode = FILE_SHARE_READ;
1286 break;
1287
1288 case DENY_READ:
1289 share_mode = FILE_SHARE_WRITE;
1290 break;
1291
1292 case DENY_NONE:
1293 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1294 break;
1295
1296 case DENY_DOS:
1297 create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1298 if (is_executable(smb_fname->base_name)) {
1299 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1300 } else {
1301 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1302 share_mode = FILE_SHARE_READ;
1303 } else {
1304 share_mode = FILE_SHARE_NONE;
1305 }
1306 }
1307 break;
1308
1309 case DENY_FCB:
1310 create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1311 share_mode = FILE_SHARE_NONE;
1312 break;
1313
1314 default:
1315 DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1316 (unsigned int)GET_DENY_MODE(deny_mode) ));
1317 return False;
1318 }
1319
1320 DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1321 "share_mode = 0x%x, create_disposition = 0x%x, "
1322 "create_options = 0x%x\n",
1323 smb_fname_str_dbg(smb_fname),
1324 (unsigned int)access_mask,
1325 (unsigned int)share_mode,
1326 (unsigned int)create_disposition,
1327 (unsigned int)create_options ));
1328
1329 if (paccess_mask) {
1330 *paccess_mask = access_mask;
1331 }
1332 if (pshare_mode) {
1333 *pshare_mode = share_mode;
1334 }
1335 if (pcreate_disposition) {
1336 *pcreate_disposition = create_disposition;
1337 }
1338 if (pcreate_options) {
1339 *pcreate_options = create_options;
1340 }
1341
1342 return True;
1343
1344 }
1345
1346 static void schedule_defer_open(struct share_mode_lock *lck,
1347 struct timeval request_time,
1348 struct smb_request *req)
1349 {
1350 struct deferred_open_record state;
1351
1352 /* This is a relative time, added to the absolute
1353 request_time value to get the absolute timeout time.
1354 Note that if this is the second or greater time we enter
1355 this codepath for this particular request mid then
1356 request_time is left as the absolute time of the *first*
1357 time this request mid was processed. This is what allows
1358 the request to eventually time out. */
1359
1360 struct timeval timeout;
1361
1362 /* Normally the smbd we asked should respond within
1363 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1364 * the client did, give twice the timeout as a safety
1365 * measure here in case the other smbd is stuck
1366 * somewhere else. */
1367
1368 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1369
1370 /* Nothing actually uses state.delayed_for_oplocks
1371 but it's handy to differentiate in debug messages
1372 between a 30 second delay due to oplock break, and
1373 a 1 second delay for share mode conflicts. */
1374
1375 state.delayed_for_oplocks = True;
1376 state.id = lck->id;
1377
1378 if (!request_timed_out(request_time, timeout)) {
1379 defer_open(lck, request_time, timeout, req, &state);
1380 }
1381 }
1382
1383 /****************************************************************************
1384 Work out what access_mask to use from what the client sent us.
1385 ****************************************************************************/
1386
1387 static NTSTATUS calculate_access_mask(connection_struct *conn,
1388 const struct smb_filename *smb_fname,
1389 bool file_existed,
1390 uint32_t access_mask,
1391 uint32_t *access_mask_out)
1392 {
1393 NTSTATUS status;
1394
1395 /*
1396 * Convert GENERIC bits to specific bits.
1397 */
1398
1399 se_map_generic(&access_mask, &file_generic_mapping);
1400
1401 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1402 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1403 if (file_existed) {
1404
1405 struct security_descriptor *sd;
1406 uint32_t access_granted = 0;
1407
1408 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1409 (OWNER_SECURITY_INFORMATION |
1410 GROUP_SECURITY_INFORMATION |
1411 DACL_SECURITY_INFORMATION),&sd);
1412
1413 if (!NT_STATUS_IS_OK(status)) {
1414 DEBUG(10, ("calculate_access_mask: Could not get acl "
1415 "on file %s: %s\n",
1416 smb_fname_str_dbg(smb_fname),
1417 nt_errstr(status)));
1418 return NT_STATUS_ACCESS_DENIED;
1419 }
1420
1421 status = smb1_file_se_access_check(conn,
1422 sd,
1423 conn->server_info->ptok,
1424 access_mask,
1425 &access_granted);
1426
1427 TALLOC_FREE(sd);
1428
1429 if (!NT_STATUS_IS_OK(status)) {
1430 DEBUG(10, ("calculate_access_mask: Access denied on "
1431 "file %s: when calculating maximum access\n",
1432 smb_fname_str_dbg(smb_fname)));
1433 return NT_STATUS_ACCESS_DENIED;
1434 }
1435
1436 access_mask = access_granted;
1437 } else {
1438 access_mask = FILE_GENERIC_ALL;
1439 }
1440 }
1441
1442 *access_mask_out = access_mask;
1443 return NT_STATUS_OK;
1444 }
1445
1446 /****************************************************************************
1447 Open a file with a share mode. Passed in an already created files_struct *.
1448 ****************************************************************************/
1449
1450 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1451 struct smb_request *req,
1452 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1453 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1454 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1455 uint32 create_options, /* options such as delete on close. */
1456 uint32 new_dos_attributes, /* attributes used for new file. */
1457 int oplock_request, /* internal Samba oplock codes. */
1458 /* Information (FILE_EXISTS etc.) */
1459 int *pinfo,
1460 files_struct *fsp)
1461 {
1462 struct smb_filename *smb_fname = fsp->fsp_name;
1463 int flags=0;
1464 int flags2=0;
1465 bool file_existed = VALID_STAT(smb_fname->st);
1466 bool def_acl = False;
1467 bool posix_open = False;
1468 bool new_file_created = False;
1469 bool clear_ads = false;
1470 struct file_id id;
1471 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1472 mode_t new_unx_mode = (mode_t)0;
1473 mode_t unx_mode = (mode_t)0;
1474 int info;
1475 uint32 existing_dos_attributes = 0;
1476 struct pending_message_list *pml = NULL;
1477 struct timeval request_time = timeval_zero();
1478 struct share_mode_lock *lck = NULL;
1479 uint32 open_access_mask = access_mask;
1480 NTSTATUS status;
1481 char *parent_dir;
1482
1483 ZERO_STRUCT(id);
1484
1485 /* Windows allows a new file to be created and
1486 silently removes a FILE_ATTRIBUTE_DIRECTORY
1487 sent by the client. Do the same. */
1488
1489 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1490
1491 if (conn->printer) {
1492 /*
1493 * Printers are handled completely differently.
1494 * Most of the passed parameters are ignored.
1495 */
1496
1497 if (pinfo) {
1498 *pinfo = FILE_WAS_CREATED;
1499 }
1500
1501 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1502 smb_fname_str_dbg(smb_fname)));
1503
1504 if (!req) {
1505 DEBUG(0,("open_file_ntcreate: printer open without "
1506 "an SMB request!\n"));
1507 return NT_STATUS_INTERNAL_ERROR;
1508 }
1509
1510 return print_fsp_open(req, conn, smb_fname->base_name,
1511 req->vuid, fsp);
1512 }
1513
1514 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1515 NULL)) {
1516 return NT_STATUS_NO_MEMORY;
1517 }
1518
1519 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1520 posix_open = True;
1521 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1522 new_dos_attributes = 0;
1523 } else {
1524 /* We add aARCH to this as this mode is only used if the file is
1525 * created new. */
1526 unx_mode = unix_mode(conn, new_dos_attributes | aARCH,
1527 smb_fname, parent_dir);
1528 }
1529
1530 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1531 "access_mask=0x%x share_access=0x%x "
1532 "create_disposition = 0x%x create_options=0x%x "
1533 "unix mode=0%o oplock_request=%d\n",
1534 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1535 access_mask, share_access, create_disposition,
1536 create_options, (unsigned int)unx_mode, oplock_request));
1537
1538 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1539 DEBUG(0, ("No smb request but not an internal only open!\n"));
1540 return NT_STATUS_INTERNAL_ERROR;
1541 }
1542
1543 /*
1544 * Only non-internal opens can be deferred at all
1545 */
1546
1547 if ((req != NULL)
1548 && ((pml = get_open_deferred_message(req->mid)) != NULL)) {
1549 struct deferred_open_record *state =
1550 (struct deferred_open_record *)pml->private_data.data;
1551
1552 /* Remember the absolute time of the original
1553 request with this mid. We'll use it later to
1554 see if this has timed out. */
1555
1556 request_time = pml->request_time;
1557
1558 /* Remove the deferred open entry under lock. */
1559 lck = get_share_mode_lock(talloc_tos(), state->id, NULL, NULL,
1560 NULL);
1561 if (lck == NULL) {
1562 DEBUG(0, ("could not get share mode lock\n"));
1563 } else {
1564 del_deferred_open_entry(lck, req->mid);
1565 TALLOC_FREE(lck);
1566 }
1567
1568 /* Ensure we don't reprocess this message. */
1569 remove_deferred_open_smb_message(req->mid);
1570 }
1571
1572 status = check_name(conn, smb_fname->base_name);
1573 if (!NT_STATUS_IS_OK(status)) {
1574 return status;
1575 }
1576
1577 if (!posix_open) {
1578 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1579 if (file_existed) {
1580 existing_dos_attributes = dos_mode(conn, smb_fname);
1581 }
1582 }
1583
1584 /* ignore any oplock requests if oplocks are disabled */
1585 if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break ||
1586 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1587 /* Mask off everything except the private Samba bits. */
1588 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1589 }
1590
1591 /* this is for OS/2 long file names - say we don't support them */
1592 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1593 /* OS/2 Workplace shell fix may be main code stream in a later
1594 * release. */
1595 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1596 "supported.\n"));
1597 if (use_nt_status()) {
1598 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1599 }
1600 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1601 }
1602
1603 switch( create_disposition ) {
1604 /*
1605 * Currently we're using FILE_SUPERSEDE as the same as
1606 * FILE_OVERWRITE_IF but they really are
1607 * different. FILE_SUPERSEDE deletes an existing file
1608 * (requiring delete access) then recreates it.
1609 */
1610 case FILE_SUPERSEDE:
1611 /* If file exists replace/overwrite. If file doesn't
1612 * exist create. */
1613 flags2 |= (O_CREAT | O_TRUNC);
1614 clear_ads = true;
1615 break;
1616
1617 case FILE_OVERWRITE_IF:
1618 /* If file exists replace/overwrite. If file doesn't
1619 * exist create. */
1620 flags2 |= (O_CREAT | O_TRUNC);
1621 clear_ads = true;
1622 break;
1623
1624 case FILE_OPEN:
1625 /* If file exists open. If file doesn't exist error. */
1626 if (!file_existed) {
1627 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1628 "requested for file %s and file "
1629 "doesn't exist.\n",
1630 smb_fname_str_dbg(smb_fname)));
1631 errno = ENOENT;
1632 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1633 }
1634 break;
1635
1636 case FILE_OVERWRITE:
1637 /* If file exists overwrite. If file doesn't exist
1638 * error. */
1639 if (!file_existed) {
1640 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1641 "requested for file %s and file "
1642 "doesn't exist.\n",
1643 smb_fname_str_dbg(smb_fname) ));
1644 errno = ENOENT;
1645 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1646 }
1647 flags2 |= O_TRUNC;
1648 clear_ads = true;
1649 break;
1650
1651 case FILE_CREATE:
1652 /* If file exists error. If file doesn't exist
1653 * create. */
1654 if (file_existed) {
1655 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1656 "requested for file %s and file "
1657 "already exists.\n",
1658 smb_fname_str_dbg(smb_fname)));
1659 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1660 errno = EISDIR;
1661 } else {
1662 errno = EEXIST;
1663 }
1664 return map_nt_error_from_unix(errno);
1665 }
1666 flags2 |= (O_CREAT|O_EXCL);
1667 break;
1668
1669 case FILE_OPEN_IF:
1670 /* If file exists open. If file doesn't exist
1671 * create. */
1672 flags2 |= O_CREAT;
1673 break;
1674
1675 default:
1676 return NT_STATUS_INVALID_PARAMETER;
1677 }
1678
1679 /* We only care about matching attributes on file exists and
1680 * overwrite. */
1681
1682 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1683 (create_disposition == FILE_OVERWRITE_IF))) {
1684 if (!open_match_attributes(conn, existing_dos_attributes,
1685 new_dos_attributes,
1686 smb_fname->st.st_ex_mode,
1687 unx_mode, &new_unx_mode)) {
1688 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1689 "for file %s (%x %x) (0%o, 0%o)\n",
1690 smb_fname_str_dbg(smb_fname),
1691 existing_dos_attributes,
1692 new_dos_attributes,
1693 (unsigned int)smb_fname->st.st_ex_mode,
1694 (unsigned int)unx_mode ));
1695 errno = EACCES;
1696 return NT_STATUS_ACCESS_DENIED;
1697 }
1698 }
1699
1700 status = calculate_access_mask(conn, smb_fname, file_existed,
1701 access_mask,
1702 &access_mask);
1703 if (!NT_STATUS_IS_OK(status)) {
1704 DEBUG(10, ("open_file_ntcreate: calculate_access_mask "
1705 "on file %s returned %s\n",
1706 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1707 return status;
1708 }
1709
1710 open_access_mask = access_mask;
1711
1712 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1713 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1714 }
1715
1716 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1717 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1718 access_mask));
1719
1720 /*
1721 * Note that we ignore the append flag as append does not
1722 * mean the same thing under DOS and Unix.
1723 */
1724
1725 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1726 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1727 /* DENY_DOS opens are always underlying read-write on the
1728 file handle, no matter what the requested access mask
1729 says. */
1730 if ((create_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1731 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1732 flags = O_RDWR;
1733 } else {
1734 flags = O_WRONLY;
1735 }
1736 } else {
1737 flags = O_RDONLY;
1738 }
1739
1740 /*
1741 * Currently we only look at FILE_WRITE_THROUGH for create options.
1742 */
1743
1744 #if defined(O_SYNC)
1745 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1746 flags2 |= O_SYNC;
1747 }
1748 #endif /* O_SYNC */
1749
1750 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1751 flags2 |= O_APPEND;
1752 }
1753
1754 if (!posix_open && !CAN_WRITE(conn)) {
1755 /*
1756 * We should really return a permission denied error if either
1757 * O_CREAT or O_TRUNC are set, but for compatibility with
1758 * older versions of Samba we just AND them out.
1759 */
1760 flags2 &= ~(O_CREAT|O_TRUNC);
1761 }
1762
1763 /*
1764 * Ensure we can't write on a read-only share or file.
1765 */
1766
1767 if (flags != O_RDONLY && file_existed &&
1768 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1769 DEBUG(5,("open_file_ntcreate: write access requested for "
1770 "file %s on read only %s\n",
1771 smb_fname_str_dbg(smb_fname),
1772 !CAN_WRITE(conn) ? "share" : "file" ));
1773 errno = EACCES;
1774 return NT_STATUS_ACCESS_DENIED;
1775 }
1776
1777 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1778 fsp->share_access = share_access;
1779 fsp->fh->private_options = create_options;
1780 fsp->access_mask = open_access_mask; /* We change this to the
1781 * requested access_mask after
1782 * the open is done. */
1783 fsp->posix_open = posix_open;
1784
1785 /* Ensure no SAMBA_PRIVATE bits can be set. */
1786 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1787
1788 if (timeval_is_zero(&request_time)) {
1789 request_time = fsp->open_time;
1790 }
1791
1792 if (file_existed) {
1793 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1794 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1795
1796 lck = get_share_mode_lock(talloc_tos(), id,
1797 conn->connectpath,
1798 smb_fname, &old_write_time);
1799
1800 if (lck == NULL) {
1801 DEBUG(0, ("Could not get share mode lock\n"));
1802 return NT_STATUS_SHARING_VIOLATION;
1803 }
1804
1805 /* First pass - send break only on batch oplocks. */
1806 if ((req != NULL)
1807 && delay_for_oplocks(lck, fsp, req->mid, 1,
1808 oplock_request)) {
1809 schedule_defer_open(lck, request_time, req);
1810 TALLOC_FREE(lck);
1811 return NT_STATUS_SHARING_VIOLATION;
1812 }
1813
1814 /* Use the client requested access mask here, not the one we
1815 * open with. */
1816 status = open_mode_check(conn, lck, access_mask, share_access,
1817 create_options, &file_existed);
1818
1819 if (NT_STATUS_IS_OK(status)) {
1820 /* We might be going to allow this open. Check oplock
1821 * status again. */
1822 /* Second pass - send break for both batch or
1823 * exclusive oplocks. */
1824 if ((req != NULL)
1825 && delay_for_oplocks(lck, fsp, req->mid, 2,
1826 oplock_request)) {
1827 schedule_defer_open(lck, request_time, req);
1828 TALLOC_FREE(lck);
1829 return NT_STATUS_SHARING_VIOLATION;
1830 }
1831 }
1832
1833 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1834 /* DELETE_PENDING is not deferred for a second */
1835 TALLOC_FREE(lck);
1836 return status;
1837 }
1838
1839 if (!NT_STATUS_IS_OK(status)) {
1840 uint32 can_access_mask;
1841 bool can_access = True;
1842
1843 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1844
1845 /* Check if this can be done with the deny_dos and fcb
1846 * calls. */
1847 if (create_options &
1848 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1849 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1850 if (req == NULL) {
1851 DEBUG(0, ("DOS open without an SMB "
1852 "request!\n"));
1853 TALLOC_FREE(lck);
1854 return NT_STATUS_INTERNAL_ERROR;
1855 }
1856
1857 /* Use the client requested access mask here,
1858 * not the one we open with. */
1859 status = fcb_or_dos_open(req,
1860 conn,
1861 fsp,
1862 smb_fname,
1863 id,
1864 req->smbpid,
1865 req->vuid,
1866 access_mask,
1867 share_access,
1868 create_options);
1869
1870 if (NT_STATUS_IS_OK(status)) {
1871 TALLOC_FREE(lck);
1872 if (pinfo) {
1873 *pinfo = FILE_WAS_OPENED;
1874 }
1875 return NT_STATUS_OK;
1876 }
1877 }
1878
1879 /*
1880 * This next line is a subtlety we need for
1881 * MS-Access. If a file open will fail due to share
1882 * permissions and also for security (access) reasons,
1883 * we need to return the access failed error, not the
1884 * share error. We can't open the file due to kernel
1885 * oplock deadlock (it's possible we failed above on
1886 * the open_mode_check()) so use a userspace check.
1887 */
1888
1889 if (flags & O_RDWR) {
1890 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1891 } else if (flags & O_WRONLY) {
1892 can_access_mask = FILE_WRITE_DATA;
1893 } else {
1894 can_access_mask = FILE_READ_DATA;
1895 }
1896
1897 if (((can_access_mask & FILE_WRITE_DATA) &&
1898 !CAN_WRITE(conn)) ||
1899 !can_access_file_data(conn, smb_fname,
1900 can_access_mask)) {
1901 can_access = False;
1902 }
1903
1904 /*
1905 * If we're returning a share violation, ensure we
1906 * cope with the braindead 1 second delay.
1907 */
1908
1909 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1910 lp_defer_sharing_violations()) {
1911 struct timeval timeout;
1912 struct deferred_open_record state;
1913 int timeout_usecs;
1914
1915 /* this is a hack to speed up torture tests
1916 in 'make test' */
1917 timeout_usecs = lp_parm_int(SNUM(conn),
1918 "smbd","sharedelay",
1919 SHARING_VIOLATION_USEC_WAIT);
1920
1921 /* This is a relative time, added to the absolute
1922 request_time value to get the absolute timeout time.
1923 Note that if this is the second or greater time we enter
1924 this codepath for this particular request mid then
1925 request_time is left as the absolute time of the *first*
1926 time this request mid was processed. This is what allows
1927 the request to eventually time out. */
1928
1929 timeout = timeval_set(0, timeout_usecs);
1930
1931 /* Nothing actually uses state.delayed_for_oplocks
1932 but it's handy to differentiate in debug messages
1933 between a 30 second delay due to oplock break, and
1934 a 1 second delay for share mode conflicts. */
1935
1936 state.delayed_for_oplocks = False;
1937 state.id = id;
1938
1939 if ((req != NULL)
1940 && !request_timed_out(request_time,
1941 timeout)) {
1942 defer_open(lck, request_time, timeout,
1943 req, &state);
1944 }
1945 }
1946
1947 TALLOC_FREE(lck);
1948 if (can_access) {
1949 /*
1950 * We have detected a sharing violation here
1951 * so return the correct error code
1952 */
1953 status = NT_STATUS_SHARING_VIOLATION;
1954 } else {
1955 status = NT_STATUS_ACCESS_DENIED;
1956 }
1957 return status;
1958 }
1959
1960 /*
1961 * We exit this block with the share entry *locked*.....
1962 */
1963 }
1964
1965 SMB_ASSERT(!file_existed || (lck != NULL));
1966
1967 /*
1968 * Ensure we pay attention to default ACLs on directories if required.
1969 */
1970
1971 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1972 (def_acl = directory_has_default_acl(conn, parent_dir))) {
1973 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
1974 }
1975
1976 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1977 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1978 (unsigned int)flags, (unsigned int)flags2,
1979 (unsigned int)unx_mode, (unsigned int)access_mask,
1980 (unsigned int)open_access_mask));
1981
1982 /*
1983 * open_file strips any O_TRUNC flags itself.
1984 */
1985
1986 fsp_open = open_file(fsp, conn, req, parent_dir,
1987 flags|flags2, unx_mode, access_mask,
1988 open_access_mask);
1989
1990 if (!NT_STATUS_IS_OK(fsp_open)) {
1991 if (lck != NULL) {
1992 TALLOC_FREE(lck);
1993 }
1994 return fsp_open;
1995 }
1996
1997 if (!file_existed) {
1998 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1999 /*
2000 * Deal with the race condition where two smbd's detect the
2001 * file doesn't exist and do the create at the same time. One
2002 * of them will win and set a share mode, the other (ie. this
2003 * one) should check if the requested share mode for this
2004 * create is allowed.
2005 */
2006
2007 /*
2008 * Now the file exists and fsp is successfully opened,
2009 * fsp->dev and fsp->inode are valid and should replace the
2010 * dev=0,inode=0 from a non existent file. Spotted by
2011 * Nadav Danieli <nadavd@exanet.com>. JRA.
2012 */
2013
2014 id = fsp->file_id;
2015
2016 lck = get_share_mode_lock(talloc_tos(), id,
2017 conn->connectpath,
2018 smb_fname, &old_write_time);
2019
2020 if (lck == NULL) {
2021 DEBUG(0, ("open_file_ntcreate: Could not get share "
2022 "mode lock for %s\n",
2023 smb_fname_str_dbg(smb_fname)));
2024 fd_close(fsp);
2025 return NT_STATUS_SHARING_VIOLATION;
2026 }
2027
2028 /* First pass - send break only on batch oplocks. */
2029 if ((req != NULL)
2030 && delay_for_oplocks(lck, fsp, req->mid, 1,
2031 oplock_request)) {
2032 schedule_defer_open(lck, request_time, req);
2033 TALLOC_FREE(lck);
2034 fd_close(fsp);
2035 return NT_STATUS_SHARING_VIOLATION;
2036 }
2037
2038 status = open_mode_check(conn, lck, access_mask, share_access,
2039 create_options, &file_existed);
2040
2041 if (NT_STATUS_IS_OK(status)) {
2042 /* We might be going to allow this open. Check oplock
2043 * status again. */
2044 /* Second pass - send break for both batch or
2045 * exclusive oplocks. */
2046 if ((req != NULL)
2047 && delay_for_oplocks(lck, fsp, req->mid, 2,
2048 oplock_request)) {
2049 schedule_defer_open(lck, request_time, req);
2050 TALLOC_FREE(lck);
2051 fd_close(fsp);
2052 return NT_STATUS_SHARING_VIOLATION;
2053 }
2054 }
2055
2056 if (!NT_STATUS_IS_OK(status)) {
2057 struct deferred_open_record state;
2058
2059 fd_close(fsp);
2060
2061 state.delayed_for_oplocks = False;
2062 state.id = id;
2063
2064 /* Do it all over again immediately. In the second
2065 * round we will find that the file existed and handle
2066 * the DELETE_PENDING and FCB cases correctly. No need
2067 * to duplicate the code here. Essentially this is a
2068 * "goto top of this function", but don't tell
2069 * anybody... */
2070
2071 if (req != NULL) {
2072 defer_open(lck, request_time, timeval_zero(),
2073 req, &state);
2074 }
2075 TALLOC_FREE(lck);
2076 return status;
2077 }
2078
2079 /*
2080 * We exit this block with the share entry *locked*.....
2081 */
2082
2083 }
2084
2085 SMB_ASSERT(lck != NULL);
2086
2087 /* Delete streams if create_disposition requires it */
2088 if (file_existed && clear_ads &&
2089 !is_ntfs_stream_smb_fname(smb_fname)) {
2090 status = delete_all_streams(conn, smb_fname->base_name);
2091 if (!NT_STATUS_IS_OK(status)) {
2092 TALLOC_FREE(lck);
2093 fd_close(fsp);
2094 return status;
2095 }
2096 }
2097
2098 /* note that we ignore failure for the following. It is
2099 basically a hack for NFS, and NFS will never set one of
2100 these only read them. Nobody but Samba can ever set a deny
2101 mode and we have already checked our more authoritative
2102 locking database for permission to set this deny mode. If
2103 the kernel refuses the operations then the kernel is wrong.
2104 note that GPFS supports it as well - jmcd */
2105
2106 if (fsp->fh->fd != -1) {
2107 int ret_flock;
2108 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2109 if(ret_flock == -1 ){
2110
2111 TALLOC_FREE(lck);
2112 fd_close(fsp);
2113
2114 return NT_STATUS_SHARING_VIOLATION;
2115 }
2116 }
2117
2118 /*
2119 * At this point onwards, we can guarentee that the share entry
2120 * is locked, whether we created the file or not, and that the
2121 * deny mode is compatible with all current opens.
2122 */
2123
2124 /*
2125 * If requested, truncate the file.
2126 */
2127
2128 if (flags2&O_TRUNC) {
2129 /*
2130 * We are modifing the file after open - update the stat
2131 * struct..
2132 */
2133 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2134 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2135 status = map_nt_error_from_unix(errno);
2136 TALLOC_FREE(lck);
2137 fd_close(fsp);
2138 return status;
2139 }
2140 }
2141
2142 /* Record the options we were opened with. */
2143 fsp->share_access = share_access;
2144 fsp->fh->private_options = create_options;
2145 /*
2146 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2147 */
2148 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2149
2150 if (file_existed) {
2151 /* stat opens on existing files don't get oplocks. */
2152 if (is_stat_open(open_access_mask)) {
2153 fsp->oplock_type = NO_OPLOCK;
2154 }
2155
2156 if (!(flags2 & O_TRUNC)) {
2157 info = FILE_WAS_OPENED;
2158 } else {
2159 info = FILE_WAS_OVERWRITTEN;
2160 }
2161 } else {
2162 info = FILE_WAS_CREATED;
2163 }
2164
2165 if (pinfo) {
2166 *pinfo = info;
2167 }
2168
2169 /*
2170 * Setup the oplock info in both the shared memory and
2171 * file structs.
2172 */
2173
2174 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2175 /* Could not get the kernel oplock */
2176 fsp->oplock_type = NO_OPLOCK;
2177 }
2178
2179 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2180 new_file_created = True;
2181 }
2182
2183 set_share_mode(lck, fsp, conn->server_info->utok.uid, 0,
2184 fsp->oplock_type);
2185
2186 /* Handle strange delete on close create semantics. */
2187 if (create_options & FILE_DELETE_ON_CLOSE) {
2188
2189 status = can_set_delete_on_close(fsp, new_dos_attributes);
2190
2191 if (!NT_STATUS_IS_OK(status)) {
2192 /* Remember to delete the mode we just added. */
2193 del_share_mode(lck, fsp);
2194 TALLOC_FREE(lck);
2195 fd_close(fsp);
2196 return status;
2197 }
2198 /* Note that here we set the *inital* delete on close flag,
2199 not the regular one. The magic gets handled in close. */
2200 fsp->initial_delete_on_close = True;
2201 }
2202
2203 if (new_file_created) {
2204 /* Files should be initially set as archive */
2205 if (lp_map_archive(SNUM(conn)) ||
2206 lp_store_dos_attributes(SNUM(conn))) {
2207 if (!posix_open) {
2208 if (file_set_dosmode(conn, smb_fname,
2209 new_dos_attributes | aARCH,
2210 parent_dir, true) == 0) {
2211 unx_mode = smb_fname->st.st_ex_mode;
2212 }
2213 }
2214 }
2215 }
2216
2217 /*
2218 * Take care of inherited ACLs on created files - if default ACL not
2219 * selected.
2220 */
2221
2222 if (!posix_open && !file_existed && !def_acl) {
2223
2224 int saved_errno = errno; /* We might get ENOSYS in the next
2225 * call.. */
2226
2227 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2228 errno == ENOSYS) {
2229 errno = saved_errno; /* Ignore ENOSYS */
2230 }
2231
2232 } else if (new_unx_mode) {
2233
2234 int ret = -1;
2235
2236 /* Attributes need changing. File already existed. */
2237
2238 {
2239 int saved_errno = errno; /* We might get ENOSYS in the
2240 * next call.. */
2241 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2242
2243 if (ret == -1 && errno == ENOSYS) {
2244 errno = saved_errno; /* Ignore ENOSYS */
2245 } else {
2246 DEBUG(5, ("open_file_ntcreate: reset "
2247 "attributes of file %s to 0%o\n",
2248 smb_fname_str_dbg(smb_fname),
2249 (unsigned int)new_unx_mode));
2250 ret = 0; /* Don't do the fchmod below. */
2251 }
2252 }
2253
2254 if ((ret == -1) &&
2255 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2256 DEBUG(5, ("open_file_ntcreate: failed to reset "
2257 "attributes of file %s to 0%o\n",
2258 smb_fname_str_dbg(smb_fname),
2259 (unsigned int)new_unx_mode));
2260 }
2261
2262 /* If this is a successful open, we must remove any deferred open
2263 * records. */
2264 if (req != NULL) {
2265 del_deferred_open_entry(lck, req->mid);
2266 }
2267 TALLOC_FREE(lck);
2268
2269 return NT_STATUS_OK;
2270 }
2271
2272
2273 /****************************************************************************
2274 Open a file for for write to ensure that we can fchmod it.
2275 ****************************************************************************/
2276
2277 NTSTATUS open_file_fchmod(connection_struct *conn,
2278 struct smb_filename *smb_fname,
2279 files_struct **result)
2280 {
2281 if (!VALID_STAT(smb_fname->st)) {
2282 return NT_STATUS_INVALID_PARAMETER;
2283 }
2284
2285 return SMB_VFS_CREATE_FILE(
2286 conn, /* conn */
2287 NULL, /* req */
2288 0, /* root_dir_fid */
2289 smb_fname, /* fname */
2290 FILE_WRITE_DATA, /* access_mask */
2291 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2292 FILE_SHARE_DELETE),
2293 FILE_OPEN, /* create_disposition*/
2294 0, /* create_options */
2295 0, /* file_attributes */
2296 INTERNAL_OPEN_ONLY, /* oplock_request */
2297 0, /* allocation_size */
2298 NULL, /* sd */
2299 NULL, /* ea_list */
2300 result, /* result */
2301 NULL); /* pinfo */
2302 }
2303
2304 static NTSTATUS mkdir_internal(connection_struct *conn,
2305 struct smb_filename *smb_dname,
2306 uint32 file_attributes)
2307 {
2308 mode_t mode;
2309 char *parent_dir;
2310 NTSTATUS status;
2311 bool posix_open = false;
2312
2313 if(!CAN_WRITE(conn)) {
2314 DEBUG(5,("mkdir_internal: failing create on read-only share "
2315 "%s\n", lp_servicename(SNUM(conn))));
2316 return NT_STATUS_ACCESS_DENIED;
2317 }
2318
2319 status = check_name(conn, smb_dname->base_name);
2320 if (!NT_STATUS_IS_OK(status)) {
2321 return status;
2322 }
2323
2324 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2325 NULL)) {
2326 return NT_STATUS_NO_MEMORY;
2327 }
2328
2329 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2330 posix_open = true;
2331 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2332 } else {
2333 mode = unix_mode(conn, aDIR, smb_dname, parent_dir);
2334 }
2335
2336 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2337 return map_nt_error_from_unix(errno);
2338 }
2339
2340 /* Ensure we're checking for a symlink here.... */
2341 /* We don't want to get caught by a symlink racer. */
2342
2343 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2344 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2345 smb_fname_str_dbg(smb_dname), strerror(errno)));
2346 return map_nt_error_from_unix(errno);
2347 }
2348
2349 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2350 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2351 smb_fname_str_dbg(smb_dname)));
2352 return NT_STATUS_ACCESS_DENIED;
2353 }
2354
2355 if (lp_store_dos_attributes(SNUM(conn))) {
2356 if (!posix_open) {
2357 file_set_dosmode(conn, smb_dname,
2358 file_attributes | aDIR,
2359 parent_dir, true);
2360 }
2361 }
2362
2363 if (lp_inherit_perms(SNUM(conn))) {
2364 inherit_access_posix_acl(conn, parent_dir,
2365 smb_dname->base_name, mode);
2366 }
2367
2368 if (!posix_open) {
2369 /*
2370 * Check if high bits should have been set,
2371 * then (if bits are missing): add them.
2372 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2373 * dir.
2374 */
2375 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2376 (mode & ~smb_dname->st.st_ex_mode)) {
2377 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2378 (smb_dname->st.st_ex_mode |
2379 (mode & ~smb_dname->st.st_ex_mode)));
2380 }
2381 }
2382
2383 /* Change the owner if required. */
2384 if (lp_inherit_owner(SNUM(conn))) {
2385 change_dir_owner_to_parent(conn, parent_dir,
2386 smb_dname->base_name,
2387 &smb_dname->st);
2388 }
2389
2390 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2391 smb_dname->base_name);
2392
2393 return NT_STATUS_OK;
2394 }
2395
2396 /****************************************************************************
2397 Open a directory from an NT SMB call.
2398 ****************************************************************************/
2399
2400 static NTSTATUS open_directory(connection_struct *conn,
2401 struct smb_request *req,
2402 struct smb_filename *smb_dname,
2403 uint32 access_mask,
2404 uint32 share_access,
2405 uint32 create_disposition,
2406 uint32 create_options,
2407 uint32 file_attributes,
2408 int *pinfo,
2409 files_struct **result)
2410 {
2411 files_struct *fsp = NULL;
2412 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2413 struct share_mode_lock *lck = NULL;
2414 NTSTATUS status;
2415 struct timespec mtimespec;
2416 int info = 0;
2417
2418 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2419
2420 /* Ensure we have a directory attribute. */
2421 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2422
2423 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2424 "share_access = 0x%x create_options = 0x%x, "
2425 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2426 smb_fname_str_dbg(smb_dname),
2427 (unsigned int)access_mask,
2428 (unsigned int)share_access,
2429 (unsigned int)create_options,
2430 (unsigned int)create_disposition,
2431 (unsigned int)file_attributes));
2432
2433 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2434 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2435 is_ntfs_stream_smb_fname(smb_dname)) {
2436 DEBUG(2, ("open_directory: %s is a stream name!\n",
2437 smb_fname_str_dbg(smb_dname)));
2438 return NT_STATUS_NOT_A_DIRECTORY;
2439 }
2440
2441 status = calculate_access_mask(conn, smb_dname, dir_existed,
2442 access_mask, &access_mask);
2443 if (!NT_STATUS_IS_OK(status)) {
2444 DEBUG(10, ("open_directory: calculate_access_mask "
2445 "on file %s returned %s\n",
2446 smb_fname_str_dbg(smb_dname),
2447 nt_errstr(status)));
2448 return status;
2449 }
2450
2451 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2452 !user_has_privileges(current_user.nt_user_token, &se_security)) {
2453 DEBUG(10, ("open_directory: open on %s "
2454 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2455 smb_fname_str_dbg(smb_dname)));
2456 return NT_STATUS_PRIVILEGE_NOT_HELD;
2457 }
2458
2459 switch( create_disposition ) {
2460 case FILE_OPEN:
2461
2462 info = FILE_WAS_OPENED;
2463
2464 /*
2465 * We want to follow symlinks here.
2466 */
2467
2468 if (SMB_VFS_STAT(conn, smb_dname) != 0) {
2469 return map_nt_error_from_unix(errno);
2470 }
2471
2472 break;
2473
2474 case FILE_CREATE:
2475
2476 /* If directory exists error. If directory doesn't
2477 * exist create. */
2478
2479 status = mkdir_internal(conn, smb_dname,
2480 file_attributes);
2481
2482 if (!NT_STATUS_IS_OK(status)) {
2483 DEBUG(2, ("open_directory: unable to create "
2484 "%s. Error was %s\n",
2485 smb_fname_str_dbg(smb_dname),
2486 nt_errstr(status)));
2487 return status;
2488 }
2489
2490 info = FILE_WAS_CREATED;
2491 break;
2492
2493 case FILE_OPEN_IF:
2494 /*
2495 * If directory exists open. If directory doesn't
2496 * exist create.
2497 */
2498
2499 status = mkdir_internal(conn, smb_dname,
2500 file_attributes);
2501
2502 if (NT_STATUS_IS_OK(status)) {
2503 info = FILE_WAS_CREATED;
2504 }
2505
2506 if (NT_STATUS_EQUAL(status,
2507 NT_STATUS_OBJECT_NAME_COLLISION)) {
2508 info = FILE_WAS_OPENED;
2509 status = NT_STATUS_OK;
2510 }
2511
2512 break;
2513
2514 case FILE_SUPERSEDE:
2515 case FILE_OVERWRITE:
2516 case FILE_OVERWRITE_IF:
2517 default:
2518 DEBUG(5,("open_directory: invalid create_disposition "
2519 "0x%x for directory %s\n",
2520 (unsigned int)create_disposition,
2521 smb_fname_str_dbg(smb_dname)));
2522 return NT_STATUS_INVALID_PARAMETER;
2523 }
2524
2525 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2526 DEBUG(5,("open_directory: %s is not a directory !\n",
2527 smb_fname_str_dbg(smb_dname)));
2528 return NT_STATUS_NOT_A_DIRECTORY;
2529 }
2530
2531 if (info == FILE_WAS_OPENED) {
2532 uint32_t access_granted = 0;
2533 status = smbd_check_open_rights(conn, smb_dname, access_mask,
2534 &access_granted);
2535
2536 /* Were we trying to do a directory open
2537 * for delete and didn't get DELETE
2538 * access (only) ? Check if the
2539 * directory allows DELETE_CHILD.
2540 * See here:
2541 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
2542 * for details. */
2543
2544 if ((NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
2545 (access_mask & DELETE_ACCESS) &&
2546 (access_granted == DELETE_ACCESS) &&
2547 can_delete_file_in_directory(conn, smb_dname))) {
2548 DEBUG(10,("open_directory: overrode ACCESS_DENIED "
2549 "on directory %s\n",
2550 smb_fname_str_dbg(smb_dname)));
2551 status = NT_STATUS_OK;
2552 }
2553
2554 if (!NT_STATUS_IS_OK(status)) {
2555 DEBUG(10, ("open_directory: smbd_check_open_rights on "
2556 "file %s failed with %s\n",
2557 smb_fname_str_dbg(smb_dname),
2558 nt_errstr(status)));
2559 return status;
2560 }
2561 }
2562
2563 status = file_new(req, conn, &fsp);
2564 if(!NT_STATUS_IS_OK(status)) {
2565 return status;
2566 }
2567
2568 /*
2569 * Setup the files_struct for it.
2570 */
2571
2572 fsp->mode = smb_dname->st.st_ex_mode;
2573 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2574 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2575 fsp->file_pid = req ? req->smbpid : 0;
2576 fsp->can_lock = False;
2577 fsp->can_read = False;
2578 fsp->can_write = False;
2579
2580 fsp->share_access = share_access;
2581 fsp->fh->private_options = create_options;
2582 /*
2583 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2584 */
2585 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2586 fsp->print_file = False;
2587 fsp->modified = False;
2588 fsp->oplock_type = NO_OPLOCK;
2589 fsp->sent_oplock_break = NO_BREAK_SENT;
2590 fsp->is_directory = True;
2591 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2592 status = fsp_set_smb_fname(fsp, smb_dname);
2593 if (!NT_STATUS_IS_OK(status)) {
2594 return status;
2595 }
2596
2597 mtimespec = smb_dname->st.st_ex_mtime;
2598
2599 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2600 conn->connectpath, smb_dname, &mtimespec);
2601
2602 if (lck == NULL) {
2603 DEBUG(0, ("open_directory: Could not get share mode lock for "
2604 "%s\n", smb_fname_str_dbg(smb_dname)));
2605 file_free(req, fsp);
2606 return NT_STATUS_SHARING_VIOLATION;
2607 }
2608
2609 status = open_mode_check(conn, lck, access_mask, share_access,
2610 create_options, &dir_existed);
2611
2612 if (!NT_STATUS_IS_OK(status)) {
2613 TALLOC_FREE(lck);
2614 file_free(req, fsp);
2615 return status;
2616 }
2617
2618 set_share_mode(lck, fsp, conn->server_info->utok.uid, 0, NO_OPLOCK);
2619
2620 /* For directories the delete on close bit at open time seems
2621 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2622 if (create_options & FILE_DELETE_ON_CLOSE) {
2623 status = can_set_delete_on_close(fsp, 0);
2624 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2625 TALLOC_FREE(lck);
2626 file_free(req, fsp);
2627 return status;
2628 }
2629
2630 if (NT_STATUS_IS_OK(status)) {
2631 /* Note that here we set the *inital* delete on close flag,
2632 not the regular one. The magic gets handled in close. */
2633 fsp->initial_delete_on_close = True;
2634 }
2635 }
2636
2637 TALLOC_FREE(lck);
2638
2639 if (pinfo) {
2640 *pinfo = info;
2641 }
2642
2643 *result = fsp;
2644 return NT_STATUS_OK;
2645 }
2646
2647 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2648 struct smb_filename *smb_dname)
2649 {
2650 NTSTATUS status;
2651 files_struct *fsp;
2652
2653 status = SMB_VFS_CREATE_FILE(
2654 conn, /* conn */
2655 req, /* req */
2656 0, /* root_dir_fid */
2657 smb_dname, /* fname */
2658 FILE_READ_ATTRIBUTES, /* access_mask */
2659 FILE_SHARE_NONE, /* share_access */
2660 FILE_CREATE, /* create_disposition*/
2661 FILE_DIRECTORY_FILE, /* create_options */
2662 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2663 0, /* oplock_request */
2664 0, /* allocation_size */
2665 NULL, /* sd */
2666 NULL, /* ea_list */
2667 &fsp, /* result */
2668 NULL); /* pinfo */
2669
2670 if (NT_STATUS_IS_OK(status)) {
2671 close_file(req, fsp, NORMAL_CLOSE);
2672 }
2673
2674 return status;
2675 }
2676
2677 /****************************************************************************
2678 Receive notification that one of our open files has been renamed by another
2679 smbd process.
2680 ****************************************************************************/
2681
2682 void msg_file_was_renamed(struct messaging_context *msg,
2683 void *private_data,
2684 uint32_t msg_type,
2685 struct server_id server_id,
2686 DATA_BLOB *data)
2687 {
2688 files_struct *fsp;
2689 char *frm = (char *)data->data;
2690 struct file_id id;
2691 const char *sharepath;
2692 const char *base_name;
2693 const char *stream_name;
2694 struct smb_filename *smb_fname = NULL;
2695 size_t sp_len, bn_len;
2696 NTSTATUS status;
2697
2698 if (data->data == NULL
2699 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2700 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2701 (int)data->length));
2702 return;
2703 }
2704
2705 /* Unpack the message. */
2706 pull_file_id_24(frm, &id);
2707 sharepath = &frm[24];
2708 sp_len = strlen(sharepath);
2709 base_name = sharepath + sp_len + 1;
2710 bn_len = strlen(base_name);
2711 stream_name = sharepath + sp_len + 1 + bn_len + 1;
2712
2713 /* stream_name must always be NULL if there is no stream. */
2714 if (stream_name[0] == '\0') {
2715 stream_name = NULL;
2716 }
2717
2718 status = create_synthetic_smb_fname(talloc_tos(), base_name,
2719 stream_name, NULL, &smb_fname);
2720 if (!NT_STATUS_IS_OK(status)) {
2721 return;
2722 }
2723
2724 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2725 "file_id %s\n",
2726 sharepath, smb_fname_str_dbg(smb_fname),
2727 file_id_string_tos(&id)));
2728
2729 for(fsp = file_find_di_first(id); fsp; fsp = file_find_di_next(fsp)) {
2730 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2731
2732 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2733 fsp->fnum, fsp_str_dbg(fsp),
2734 smb_fname_str_dbg(smb_fname)));
2735 status = fsp_set_smb_fname(fsp, smb_fname);
2736 if (!NT_STATUS_IS_OK(status)) {
2737 goto out;
2738 }
2739 } else {
2740 /* TODO. JRA. */
2741 /* Now we have the complete path we can work out if this is
2742 actually within this share and adjust newname accordingly. */
2743 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2744 "not sharepath %s) "
2745 "fnum %d from %s -> %s\n",
2746 fsp->conn->connectpath,
2747 sharepath,
2748 fsp->fnum,
2749 fsp_str_dbg(fsp),
2750 smb_fname_str_dbg(smb_fname)));
2751 }
2752 }
2753 out:
2754 TALLOC_FREE(smb_fname);
2755 return;
2756 }
2757
2758 /*
2759 * If a main file is opened for delete, all streams need to be checked for
2760 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2761 * If that works, delete them all by setting the delete on close and close.
2762 */
2763
2764 NTSTATUS open_streams_for_delete(connection_struct *conn,
2765 const char *fname)
2766 {
2767 struct stream_struct *stream_info;
2768 files_struct **streams;
2769 int i;
2770 unsigned int num_streams;
2771 TALLOC_CTX *frame = talloc_stackframe();
2772 NTSTATUS status;
2773
2774 status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
2775 &num_streams, &stream_info);
2776
2777 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2778 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2779 DEBUG(10, ("no streams around\n"));
2780 TALLOC_FREE(frame);
2781 return NT_STATUS_OK;
2782 }
2783
2784 if (!NT_STATUS_IS_OK(status)) {
2785 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
2786 nt_errstr(status)));
2787 goto fail;
2788 }
2789
2790 DEBUG(10, ("open_streams_for_delete found %d streams\n",
2791 num_streams));
2792
2793 if (num_streams == 0) {
2794 TALLOC_FREE(frame);
2795 return NT_STATUS_OK;
2796 }
2797
2798 streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
2799 if (streams == NULL) {
2800 DEBUG(0, ("talloc failed\n"));
2801 status = NT_STATUS_NO_MEMORY;
2802 goto fail;
2803 }
2804
2805 for (i=0; i<num_streams; i++) {
2806 struct smb_filename *smb_fname = NULL;
2807
2808 if (strequal(stream_info[i].name, "::$DATA")) {
2809 streams[i] = NULL;
2810 continue;
2811 }
2812
2813 status = create_synthetic_smb_fname(talloc_tos(), fname,
2814 stream_info[i].name,
2815 NULL, &smb_fname);
2816 if (!NT_STATUS_IS_OK(status)) {
2817 goto fail;
2818 }
2819
2820 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
2821 DEBUG(10, ("Unable to stat stream: %s\n",
2822 smb_fname_str_dbg(smb_fname)));
2823 }
2824
2825 status = SMB_VFS_CREATE_FILE(
2826 conn, /* conn */
2827 NULL, /* req */
2828 0, /* root_dir_fid */
2829 smb_fname, /* fname */
2830 DELETE_ACCESS, /* access_mask */
2831 (FILE_SHARE_READ | /* share_access */
2832 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
2833 FILE_OPEN, /* create_disposition*/
2834 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* create_options */
2835 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
2836 0, /* oplock_request */
2837 0, /* allocation_size */
2838 NULL, /* sd */
2839 NULL, /* ea_list */
2840 &streams[i], /* result */
2841 NULL); /* pinfo */
2842
2843 if (!NT_STATUS_IS_OK(status)) {
2844 DEBUG(10, ("Could not open stream %s: %s\n",
2845 smb_fname_str_dbg(smb_fname),
2846 nt_errstr(status)));
2847
2848 TALLOC_FREE(smb_fname);
2849 break;
2850 }
2851 TALLOC_FREE(smb_fname);
2852 }
2853
2854 /*
2855 * don't touch the variable "status" beyond this point :-)
2856 */
2857
2858 for (i -= 1 ; i >= 0; i--) {
2859 if (streams[i] == NULL) {
2860 continue;
2861 }
2862
2863 DEBUG(10, ("Closing stream # %d, %s\n", i,
2864 fsp_str_dbg(streams[i])));
2865 close_file(NULL, streams[i], NORMAL_CLOSE);
2866 }
2867
2868 fail:
2869 TALLOC_FREE(frame);
2870 return status;
2871 }
2872
2873 /*
2874 * Wrapper around open_file_ntcreate and open_directory
2875 */
2876
2877 static NTSTATUS create_file_unixpath(connection_struct *conn,
2878 struct smb_request *req,
2879 struct smb_filename *smb_fname,
2880 uint32_t access_mask,
2881 uint32_t share_access,
2882 uint32_t create_disposition,
2883 uint32_t create_options,
2884 uint32_t file_attributes,
2885 uint32_t oplock_request,
2886 uint64_t allocation_size,
2887 struct security_descriptor *sd,
2888 struct ea_list *ea_list,
2889
2890 files_struct **result,
2891 int *pinfo)
2892 {
2893 int info = FILE_WAS_OPENED;
2894 files_struct *base_fsp = NULL;
2895 files_struct *fsp = NULL;
2896 NTSTATUS status;
2897
2898 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
2899 "file_attributes = 0x%x, share_access = 0x%x, "
2900 "create_disposition = 0x%x create_options = 0x%x "
2901 "oplock_request = 0x%x ea_list = 0x%p, sd = 0x%p, "
2902 "fname = %s\n",
2903 (unsigned int)access_mask,
2904 (unsigned int)file_attributes,
2905 (unsigned int)share_access,
2906 (unsigned int)create_disposition,
2907 (unsigned int)create_options,
2908 (unsigned int)oplock_request,
2909 ea_list, sd, smb_fname_str_dbg(smb_fname)));
2910
2911 if (create_options & FILE_OPEN_BY_FILE_ID) {
2912 status = NT_STATUS_NOT_SUPPORTED;
2913 goto fail;
2914 }
2915
2916 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
2917 status = NT_STATUS_INVALID_PARAMETER;
2918 goto fail;
2919 }
2920
2921 if (req == NULL) {
2922 oplock_request |= INTERNAL_OPEN_ONLY;
2923 }
2924
2925 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2926 && (access_mask & DELETE_ACCESS)
2927 && !is_ntfs_stream_smb_fname(smb_fname)) {
2928 /*
2929 * We can't open a file with DELETE access if any of the
2930 * streams is open without FILE_SHARE_DELETE
2931 */
2932 status = open_streams_for_delete(conn, smb_fname->base_name);
2933
2934 if (!NT_STATUS_IS_OK(status)) {
2935 goto fail;
2936 }
2937 }
2938
2939 /* This is the correct thing to do (check every time) but can_delete
2940 * is expensive (it may have to read the parent directory
2941 * permissions). So for now we're not doing it unless we have a strong
2942 * hint the client is really going to delete this file. If the client
2943 * is forcing FILE_CREATE let the filesystem take care of the
2944 * permissions. */
2945
2946 /* Setting FILE_SHARE_DELETE is the hint. */
2947
2948 if (lp_acl_check_permissions(SNUM(conn))
2949 && (create_disposition != FILE_CREATE)
2950 && (access_mask & DELETE_ACCESS)
2951 && (!(can_delete_file_in_directory(conn, smb_fname) ||
2952 can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
2953 status = NT_STATUS_ACCESS_DENIED;
2954 DEBUG(10,("create_file_unixpath: open file %s "
2955 "for delete ACCESS_DENIED\n",
2956 smb_fname_str_dbg(smb_fname)));
2957 goto fail;
2958 }
2959
2960 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2961 !user_has_privileges(current_user.nt_user_token, &se_security)) {
2962 DEBUG(10, ("create_file_unixpath:: open on %s "
2963 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2964 smb_fname_str_dbg(smb_fname)));
2965 status = NT_STATUS_PRIVILEGE_NOT_HELD;
2966 goto fail;
2967 }
2968
2969 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2970 && is_ntfs_stream_smb_fname(smb_fname)
2971 && (!(create_options & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
2972 uint32 base_create_disposition;
2973 struct smb_filename *smb_fname_base = NULL;
2974
2975 if (create_options & FILE_DIRECTORY_FILE) {
2976 status = NT_STATUS_NOT_A_DIRECTORY;
2977 goto fail;
2978 }
2979
2980 switch (create_disposition) {
2981 case FILE_OPEN:
2982 base_create_disposition = FILE_OPEN;
2983 break;
2984 default:
2985 base_create_disposition = FILE_OPEN_IF;
2986 break;
2987 }
2988
2989 /* Create an smb_filename with stream_name == NULL. */
2990 status = create_synthetic_smb_fname(talloc_tos(),
2991 smb_fname->base_name,
2992 NULL, NULL,
2993 &smb_fname_base);
2994 if (!NT_STATUS_IS_OK(status)) {
2995 goto fail;
2996 }
2997
2998 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
2999 DEBUG(10, ("Unable to stat stream: %s\n",
3000 smb_fname_str_dbg(smb_fname_base)));
3001 }
3002
3003 /* Open the base file. */
3004 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3005 FILE_SHARE_READ
3006 | FILE_SHARE_WRITE
3007 | FILE_SHARE_DELETE,
3008 base_create_disposition,
3009 0, 0, 0, 0, NULL, NULL,
3010 &base_fsp, NULL);
3011 TALLOC_FREE(smb_fname_base);
3012
3013 if (!NT_STATUS_IS_OK(status)) {
3014 DEBUG(10, ("create_file_unixpath for base %s failed: "
3015 "%s\n", smb_fname->base_name,
3016 nt_errstr(status)));
3017 goto fail;
3018 }
3019 /* we don't need to low level fd */
3020 fd_close(base_fsp);
3021 }
3022
3023 /*
3024 * If it's a request for a directory open, deal with it separately.
3025 */
3026
3027 if (create_options & FILE_DIRECTORY_FILE) {
3028
3029 if (create_options & FILE_NON_DIRECTORY_FILE) {
3030 status = NT_STATUS_INVALID_PARAMETER;
3031 goto fail;
3032 }
3033
3034 /* Can't open a temp directory. IFS kit test. */
3035 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3036 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3037 status = NT_STATUS_INVALID_PARAMETER;
3038 goto fail;
3039 }
3040
3041 /*
3042 * We will get a create directory here if the Win32
3043 * app specified a security descriptor in the
3044 * CreateDirectory() call.
3045 */
3046
3047 oplock_request = 0;
3048 status = open_directory(
3049 conn, req, smb_fname, access_mask, share_access,
3050 create_disposition, create_options, file_attributes,
3051 &info, &fsp);
3052 } else {
3053
3054 /*
3055 * Ordinary file case.
3056 */
3057
3058 status = file_new(req, conn, &fsp);
3059 if(!NT_STATUS_IS_OK(status)) {
3060 goto fail;
3061 }
3062
3063 status = fsp_set_smb_fname(fsp, smb_fname);
3064 if (!NT_STATUS_IS_OK(status)) {
3065 goto fail;
3066 }
3067
3068 /*
3069 * We're opening the stream element of a base_fsp
3070 * we already opened. Set up the base_fsp pointer.
3071 */
3072 if (base_fsp) {
3073 fsp->base_fsp = base_fsp;
3074 }
3075
3076 status = open_file_ntcreate(conn,
3077 req,
3078 access_mask,
3079 share_access,
3080 create_disposition,
3081 create_options,
3082 file_attributes,
3083 oplock_request,
3084 &info,
3085 fsp);
3086
3087 if(!NT_STATUS_IS_OK(status)) {
3088 file_free(req, fsp);
3089 fsp = NULL;
3090 }
3091
3092 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3093
3094 /* A stream open never opens a directory */
3095
3096 if (base_fsp) {
3097 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3098 goto fail;
3099 }
3100
3101 /*
3102 * Fail the open if it was explicitly a non-directory
3103 * file.
3104 */
3105
3106 if (create_options & FILE_NON_DIRECTORY_FILE) {
3107 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3108 goto fail;
3109 }
3110
3111 oplock_request = 0;
3112 status = open_directory(
3113 conn, req, smb_fname, access_mask,
3114 share_access, create_disposition,
3115 create_options, file_attributes,
3116 &info, &fsp);
3117 }
3118 }
3119
3120 if (!NT_STATUS_IS_OK(status)) {
3121 goto fail;
3122 }
3123
3124 fsp->base_fsp = base_fsp;
3125
3126 /*
3127 * According to the MS documentation, the only time the security
3128 * descriptor is applied to the opened file is iff we *created* the
3129 * file; an existing file stays the same.
3130 *
3131 * Also, it seems (from observation) that you can open the file with
3132 * any access mask but you can still write the sd. We need to override
3133 * the granted access before we call set_sd
3134 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3135 */
3136
3137 if ((sd != NULL) && (info == FILE_WAS_CREATED)
3138 && lp_nt_acl_support(SNUM(conn))) {
3139
3140 uint32_t sec_info_sent;
3141 uint32_t saved_access_mask = fsp->access_mask;
3142
3143 sec_info_sent = get_sec_info(sd);
3144
3145 fsp->access_mask = FILE_GENERIC_ALL;
3146
3147 /* Convert all the generic bits. */
3148 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3149 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3150
3151 if (sec_info_sent & (OWNER_SECURITY_INFORMATION|
3152 GROUP_SECURITY_INFORMATION|
3153 DACL_SECURITY_INFORMATION|
3154 SACL_SECURITY_INFORMATION)) {
3155 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3156 }
3157
3158 fsp->access_mask = saved_access_mask;
3159
3160 if (!NT_STATUS_IS_OK(status)) {
3161 goto fail;
3162 }
3163 }
3164
3165 if ((ea_list != NULL) &&
3166 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3167 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3168 if (!NT_STATUS_IS_OK(status)) {
3169 goto fail;
3170 }
3171 }
3172
3173 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3174 status = NT_STATUS_ACCESS_DENIED;
3175 goto fail;
3176 }
3177
3178 /* Save the requested allocation size. */
3179 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3180 if (allocation_size
3181 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3182 fsp->initial_allocation_size = smb_roundup(
3183 fsp->conn, allocation_size);
3184 if (fsp->is_directory) {
3185 /* Can't set allocation size on a directory. */
3186 status = NT_STATUS_ACCESS_DENIED;
3187 goto fail;
3188 }
3189 if (vfs_allocate_file_space(
3190 fsp, fsp->initial_allocation_size) == -1) {
3191 status = NT_STATUS_DISK_FULL;
3192 goto fail;
3193 }
3194 } else {
3195 fsp->initial_allocation_size = smb_roundup(
3196 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3197 }
3198 }
3199
3200 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3201
3202 *result = fsp;
3203 if (pinfo != NULL) {
3204 *pinfo = info;
3205 }
3206
3207 smb_fname->st = fsp->fsp_name->st;
3208
3209 return NT_STATUS_OK;
3210
3211 fail:
3212 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3213
3214 if (fsp != NULL) {
3215 if (base_fsp && fsp->base_fsp == base_fsp) {
3216 /*
3217 * The close_file below will close
3218 * fsp->base_fsp.
3219 */
3220 base_fsp = NULL;
3221 }
3222 close_file(req, fsp, ERROR_CLOSE);
3223 fsp = NULL;
3224 }
3225 if (base_fsp != NULL) {
3226 close_file(req, base_fsp, ERROR_CLOSE);
3227 base_fsp = NULL;
3228 }
3229 return status;
3230 }
3231
3232 /*
3233 * Calculate the full path name given a relative fid.
3234 */
3235 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3236 struct smb_request *req,
3237 uint16_t root_dir_fid,
3238 const struct smb_filename *smb_fname,
3239 struct smb_filename **smb_fname_out)
3240 {
3241 files_struct *dir_fsp;
3242 char *parent_fname = NULL;
3243 char *new_base_name = NULL;
3244 NTSTATUS status;
3245
3246 if (root_dir_fid == 0 || !smb_fname) {
3247 status = NT_STATUS_INTERNAL_ERROR;
3248 goto out;
3249 }
3250
3251 dir_fsp = file_fsp(req, root_dir_fid);
3252
3253 if (dir_fsp == NULL) {
3254 status = NT_STATUS_INVALID_HANDLE;
3255 goto out;
3256 }
3257
3258 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3259 status = NT_STATUS_INVALID_HANDLE;
3260 goto out;
3261 }
3262
3263 if (!dir_fsp->is_directory) {
3264
3265 /*
3266 * Check to see if this is a mac fork of some kind.
3267 */
3268
3269 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3270 is_ntfs_stream_smb_fname(smb_fname)) {
3271 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3272 goto out;
3273 }
3274
3275 /*
3276 we need to handle the case when we get a
3277 relative open relative to a file and the
3278 pathname is blank - this is a reopen!
3279 (hint from demyn plantenberg)
3280 */
3281
3282 status = NT_STATUS_INVALID_HANDLE;
3283 goto out;
3284 }
3285
3286 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3287 /*
3288 * We're at the toplevel dir, the final file name
3289 * must not contain ./, as this is filtered out
3290 * normally by srvstr_get_path and unix_convert
3291 * explicitly rejects paths containing ./.
3292 */
3293 parent_fname = talloc_strdup(talloc_tos(), "");
3294 if (parent_fname == NULL) {
3295 status = NT_STATUS_NO_MEMORY;
3296 goto out;
3297 }
3298 } else {
3299 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3300
3301 /*
3302 * Copy in the base directory name.
3303 */
3304
3305 parent_fname = TALLOC_ARRAY(talloc_tos(), char,
3306 dir_name_len+2);
3307 if (parent_fname == NULL) {
3308 status = NT_STATUS_NO_MEMORY;
3309 goto out;
3310 }
3311 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3312 dir_name_len+1);
3313
3314 /*
3315 * Ensure it ends in a '/'.
3316 * We used TALLOC_SIZE +2 to add space for the '/'.
3317 */
3318
3319 if(dir_name_len
3320 && (parent_fname[dir_name_len-1] != '\\')
3321 && (parent_fname[dir_name_len-1] != '/')) {
3322 parent_fname[dir_name_len] = '/';
3323 parent_fname[dir_name_len+1] = '\0';
3324 }
3325 }
3326
3327 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3328 smb_fname->base_name);
3329 if (new_base_name == NULL) {
3330 status = NT_STATUS_NO_MEMORY;
3331 goto out;
3332 }
3333
3334 status = filename_convert(req,
3335 conn,
3336 req->flags2 & FLAGS2_DFS_PATHNAMES,
3337 new_base_name,
3338 0,
3339 NULL,
3340 smb_fname_out);
3341 if (!NT_STATUS_IS_OK(status)) {
3342 goto out;
3343 }
3344
3345 out:
3346 TALLOC_FREE(parent_fname);
3347 return status;
3348 }
3349
3350 NTSTATUS create_file_default(connection_struct *conn,
3351 struct smb_request *req,
3352 uint16_t root_dir_fid,
3353 struct smb_filename *smb_fname,
3354 uint32_t access_mask,
3355 uint32_t share_access,
3356 uint32_t create_disposition,
3357 uint32_t create_options,
3358 uint32_t file_attributes,
3359 uint32_t oplock_request,
3360 uint64_t allocation_size,
3361 struct security_descriptor *sd,
3362 struct ea_list *ea_list,
3363 files_struct **result,
3364 int *pinfo)
3365 {
3366 int info = FILE_WAS_OPENED;
3367 files_struct *fsp = NULL;
3368 NTSTATUS status;
3369
3370 DEBUG(10,("create_file: access_mask = 0x%x "
3371 "file_attributes = 0x%x, share_access = 0x%x, "
3372 "create_disposition = 0x%x create_options = 0x%x "
3373 "oplock_request = 0x%x "
3374 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3375 "fname = %s\n",
3376 (unsigned int)access_mask,
3377 (unsigned int)file_attributes,
3378 (unsigned int)share_access,
3379 (unsigned int)create_disposition,
3380 (unsigned int)create_options,
3381 (unsigned int)oplock_request,
3382 (unsigned int)root_dir_fid,
3383 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3384
3385 /*
3386 * Calculate the filename from the root_dir_if if necessary.
3387 */
3388
3389 if (root_dir_fid != 0) {
3390 struct smb_filename *smb_fname_out = NULL;
3391 status = get_relative_fid_filename(conn, req, root_dir_fid,
3392 smb_fname, &smb_fname_out);
3393 if (!NT_STATUS_IS_OK(status)) {
3394 goto fail;
3395 }
3396 smb_fname = smb_fname_out;
3397 }
3398
3399 /*
3400 * Check to see if this is a mac fork of some kind.
3401 */
3402
3403 if (is_ntfs_stream_smb_fname(smb_fname)) {
3404 enum FAKE_FILE_TYPE fake_file_type;
3405
3406 fake_file_type = is_fake_file(smb_fname);
3407
3408 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3409
3410 /*
3411 * Here we go! support for changing the disk quotas
3412 * --metze
3413 *
3414 * We need to fake up to open this MAGIC QUOTA file
3415 * and return a valid FID.
3416 *
3417 * w2k close this file directly after openening xp
3418 * also tries a QUERY_FILE_INFO on the file and then
3419 * close it
3420 */
3421 status = open_fake_file(req, conn, req->vuid,
3422 fake_file_type, smb_fname,
3423 access_mask, &fsp);
3424 if (!NT_STATUS_IS_OK(status)) {
3425 goto fail;
3426 }
3427
3428 ZERO_STRUCT(smb_fname->st);
3429 goto done;
3430 }
3431
3432 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3433 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3434 goto fail;
3435 }
3436 }
3437
3438 /* All file access must go through check_name() */
3439
3440 status = check_name(conn, smb_fname->base_name);
3441 if (!NT_STATUS_IS_OK(status)) {
3442 goto fail;
3443 }
3444
3445 status = create_file_unixpath(
3446 conn, req, smb_fname, access_mask, share_access,
3447 create_disposition, create_options, file_attributes,
3448 oplock_request, allocation_size, sd, ea_list,
3449 &fsp, &info);
3450
3451 if (!NT_STATUS_IS_OK(status)) {
3452 goto fail;
3453 }
3454
3455 done:
3456 DEBUG(10, ("create_file: info=%d\n", info));
3457
3458 *result = fsp;
3459 if (pinfo != NULL) {
3460 *pinfo = info;
3461 }
3462 return NT_STATUS_OK;
3463
3464 fail:
3465 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3466
3467 if (fsp != NULL) {
3468 close_file(req, fsp, ERROR_CLOSE);
3469 fsp = NULL;
3470 }
3471 return status;
3472 }
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