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Fix error code when smbclient puts a file over an existing directory
[Samba/gbeck.git] / source3 / smbd / open.c
blob1e988f65ec6a22ab49023d6b40411e3d1805713f
1 /*
2 Unix SMB/CIFS implementation.
3 file opening and share modes
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2004
6 Copyright (C) Volker Lendecke 2005
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23
24 extern const struct generic_mapping file_generic_mapping;
25 extern bool global_client_failed_oplock_break;
26
27 struct deferred_open_record {
28 bool delayed_for_oplocks;
29 struct file_id id;
30 };
31
32 static NTSTATUS create_file_unixpath(connection_struct *conn,
33 struct smb_request *req,
34 const char *fname,
35 uint32_t access_mask,
36 uint32_t share_access,
37 uint32_t create_disposition,
38 uint32_t create_options,
39 uint32_t file_attributes,
40 uint32_t oplock_request,
41 uint64_t allocation_size,
42 struct security_descriptor *sd,
43 struct ea_list *ea_list,
44
45 files_struct **result,
46 int *pinfo,
47 SMB_STRUCT_STAT *psbuf);
48
49 /****************************************************************************
50 SMB1 file varient of se_access_check. Never test FILE_READ_ATTRIBUTES.
51 ****************************************************************************/
52
53 NTSTATUS smb1_file_se_access_check(const struct security_descriptor *sd,
54 const NT_USER_TOKEN *token,
55 uint32_t access_desired,
56 uint32_t *access_granted)
57 {
58 return se_access_check(sd,
59 token,
60 (access_desired & ~FILE_READ_ATTRIBUTES),
61 access_granted);
62 }
63
64 /****************************************************************************
65 Check if we have open rights.
66 ****************************************************************************/
67
68 static NTSTATUS check_open_rights(struct connection_struct *conn,
69 const char *fname,
70 uint32_t access_mask)
71 {
72 /* Check if we have rights to open. */
73 NTSTATUS status;
74 uint32_t access_granted = 0;
75 struct security_descriptor *sd;
76
77 status = SMB_VFS_GET_NT_ACL(conn, fname,
78 (OWNER_SECURITY_INFORMATION |
79 GROUP_SECURITY_INFORMATION |
80 DACL_SECURITY_INFORMATION),&sd);
81
82 if (!NT_STATUS_IS_OK(status)) {
83 DEBUG(10, ("check_open_rights: Could not get acl "
84 "on %s: %s\n",
85 fname,
86 nt_errstr(status)));
87 return status;
88 }
89
90 status = smb1_file_se_access_check(sd,
91 conn->server_info->ptok,
92 access_mask,
93 &access_granted);
94
95 TALLOC_FREE(sd);
96 return status;
97 }
98
99 /****************************************************************************
100 fd support routines - attempt to do a dos_open.
101 ****************************************************************************/
102
103 static NTSTATUS fd_open(struct connection_struct *conn,
104 const char *fname,
105 files_struct *fsp,
106 int flags,
107 mode_t mode)
108 {
109 NTSTATUS status = NT_STATUS_OK;
110
111 #ifdef O_NOFOLLOW
112 /*
113 * Never follow symlinks on a POSIX client. The
114 * client should be doing this.
115 */
116
117 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
118 flags |= O_NOFOLLOW;
119 }
120 #endif
121
122 fsp->fh->fd = SMB_VFS_OPEN(conn,fname,fsp,flags,mode);
123 if (fsp->fh->fd == -1) {
124 status = map_nt_error_from_unix(errno);
125 }
126
127 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
128 fname, flags, (int)mode, fsp->fh->fd,
129 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
130
131 return status;
132 }
133
134 /****************************************************************************
135 Close the file associated with a fsp.
136 ****************************************************************************/
137
138 NTSTATUS fd_close(files_struct *fsp)
139 {
140 int ret;
141
142 if (fsp->fh->fd == -1) {
143 return NT_STATUS_OK; /* What we used to call a stat open. */
144 }
145 if (fsp->fh->ref_count > 1) {
146 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
147 }
148
149 ret = SMB_VFS_CLOSE(fsp);
150 fsp->fh->fd = -1;
151 if (ret == -1) {
152 return map_nt_error_from_unix(errno);
153 }
154 return NT_STATUS_OK;
155 }
156
157 /****************************************************************************
158 Change the ownership of a file to that of the parent directory.
159 Do this by fd if possible.
160 ****************************************************************************/
161
162 void change_file_owner_to_parent(connection_struct *conn,
163 const char *inherit_from_dir,
164 files_struct *fsp)
165 {
166 SMB_STRUCT_STAT parent_st;
167 int ret;
168
169 ret = SMB_VFS_STAT(conn, inherit_from_dir, &parent_st);
170 if (ret == -1) {
171 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
172 "directory %s. Error was %s\n",
173 inherit_from_dir, strerror(errno) ));
174 return;
175 }
176
177 become_root();
178 ret = SMB_VFS_FCHOWN(fsp, parent_st.st_uid, (gid_t)-1);
179 unbecome_root();
180 if (ret == -1) {
181 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
182 "file %s to parent directory uid %u. Error "
183 "was %s\n", fsp->fsp_name,
184 (unsigned int)parent_st.st_uid,
185 strerror(errno) ));
186 }
187
188 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
189 "parent directory uid %u.\n", fsp->fsp_name,
190 (unsigned int)parent_st.st_uid ));
191 }
192
193 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
194 const char *inherit_from_dir,
195 const char *fname,
196 SMB_STRUCT_STAT *psbuf)
197 {
198 char *saved_dir = NULL;
199 SMB_STRUCT_STAT sbuf;
200 SMB_STRUCT_STAT parent_st;
201 TALLOC_CTX *ctx = talloc_tos();
202 NTSTATUS status = NT_STATUS_OK;
203 int ret;
204
205 ret = SMB_VFS_STAT(conn, inherit_from_dir, &parent_st);
206 if (ret == -1) {
207 status = map_nt_error_from_unix(errno);
208 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
209 "directory %s. Error was %s\n",
210 inherit_from_dir, strerror(errno) ));
211 return status;
212 }
213
214 /* We've already done an lstat into psbuf, and we know it's a
215 directory. If we can cd into the directory and the dev/ino
216 are the same then we can safely chown without races as
217 we're locking the directory in place by being in it. This
218 should work on any UNIX (thanks tridge :-). JRA.
219 */
220
221 saved_dir = vfs_GetWd(ctx,conn);
222 if (!saved_dir) {
223 status = map_nt_error_from_unix(errno);
224 DEBUG(0,("change_dir_owner_to_parent: failed to get "
225 "current working directory. Error was %s\n",
226 strerror(errno)));
227 return status;
228 }
229
230 /* Chdir into the new path. */
231 if (vfs_ChDir(conn, fname) == -1) {
232 status = map_nt_error_from_unix(errno);
233 DEBUG(0,("change_dir_owner_to_parent: failed to change "
234 "current working directory to %s. Error "
235 "was %s\n", fname, strerror(errno) ));
236 goto out;
237 }
238
239 if (SMB_VFS_STAT(conn,".",&sbuf) == -1) {
240 status = map_nt_error_from_unix(errno);
241 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
242 "directory '.' (%s) Error was %s\n",
243 fname, strerror(errno)));
244 goto out;
245 }
246
247 /* Ensure we're pointing at the same place. */
248 if (sbuf.st_dev != psbuf->st_dev ||
249 sbuf.st_ino != psbuf->st_ino ||
250 sbuf.st_mode != psbuf->st_mode ) {
251 DEBUG(0,("change_dir_owner_to_parent: "
252 "device/inode/mode on directory %s changed. "
253 "Refusing to chown !\n", fname ));
254 status = NT_STATUS_ACCESS_DENIED;
255 goto out;
256 }
257
258 become_root();
259 ret = SMB_VFS_CHOWN(conn, ".", parent_st.st_uid, (gid_t)-1);
260 unbecome_root();
261 if (ret == -1) {
262 status = map_nt_error_from_unix(errno);
263 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
264 "directory %s to parent directory uid %u. "
265 "Error was %s\n", fname,
266 (unsigned int)parent_st.st_uid, strerror(errno) ));
267 goto out;
268 }
269
270 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
271 "directory %s to parent directory uid %u.\n",
272 fname, (unsigned int)parent_st.st_uid ));
273
274 out:
275
276 vfs_ChDir(conn,saved_dir);
277 return status;
278 }
279
280 /****************************************************************************
281 Open a file.
282 ****************************************************************************/
283
284 static NTSTATUS open_file(files_struct *fsp,
285 connection_struct *conn,
286 struct smb_request *req,
287 const char *parent_dir,
288 const char *name,
289 const char *path,
290 SMB_STRUCT_STAT *psbuf,
291 int flags,
292 mode_t unx_mode,
293 uint32 access_mask, /* client requested access mask. */
294 uint32 open_access_mask) /* what we're actually using in the open. */
295 {
296 NTSTATUS status = NT_STATUS_OK;
297 int accmode = (flags & O_ACCMODE);
298 int local_flags = flags;
299 bool file_existed = VALID_STAT(*psbuf);
300
301 fsp->fh->fd = -1;
302 errno = EPERM;
303
304 /* Check permissions */
305
306 /*
307 * This code was changed after seeing a client open request
308 * containing the open mode of (DENY_WRITE/read-only) with
309 * the 'create if not exist' bit set. The previous code
310 * would fail to open the file read only on a read-only share
311 * as it was checking the flags parameter directly against O_RDONLY,
312 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
313 * JRA.
314 */
315
316 if (!CAN_WRITE(conn)) {
317 /* It's a read-only share - fail if we wanted to write. */
318 if(accmode != O_RDONLY) {
319 DEBUG(3,("Permission denied opening %s\n", path));
320 return NT_STATUS_ACCESS_DENIED;
321 } else if(flags & O_CREAT) {
322 /* We don't want to write - but we must make sure that
323 O_CREAT doesn't create the file if we have write
324 access into the directory.
325 */
326 flags &= ~O_CREAT;
327 local_flags &= ~O_CREAT;
328 }
329 }
330
331 /*
332 * This little piece of insanity is inspired by the
333 * fact that an NT client can open a file for O_RDONLY,
334 * but set the create disposition to FILE_EXISTS_TRUNCATE.
335 * If the client *can* write to the file, then it expects to
336 * truncate the file, even though it is opening for readonly.
337 * Quicken uses this stupid trick in backup file creation...
338 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
339 * for helping track this one down. It didn't bite us in 2.0.x
340 * as we always opened files read-write in that release. JRA.
341 */
342
343 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
344 DEBUG(10,("open_file: truncate requested on read-only open "
345 "for file %s\n", path));
346 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
347 }
348
349 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
350 (!file_existed && (local_flags & O_CREAT)) ||
351 ((local_flags & O_TRUNC) == O_TRUNC) ) {
352 const char *wild;
353
354 /*
355 * We can't actually truncate here as the file may be locked.
356 * open_file_ntcreate will take care of the truncate later. JRA.
357 */
358
359 local_flags &= ~O_TRUNC;
360
361 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
362 /*
363 * We would block on opening a FIFO with no one else on the
364 * other end. Do what we used to do and add O_NONBLOCK to the
365 * open flags. JRA.
366 */
367
368 if (file_existed && S_ISFIFO(psbuf->st_mode)) {
369 local_flags |= O_NONBLOCK;
370 }
371 #endif
372
373 /* Don't create files with Microsoft wildcard characters. */
374 if (fsp->base_fsp) {
375 /*
376 * wildcard characters are allowed in stream names
377 * only test the basefilename
378 */
379 wild = fsp->base_fsp->fsp_name;
380 } else {
381 wild = path;
382 }
383 if ((local_flags & O_CREAT) && !file_existed &&
384 ms_has_wild(wild)) {
385 return NT_STATUS_OBJECT_NAME_INVALID;
386 }
387
388 /* Actually do the open */
389 status = fd_open(conn, path, fsp, local_flags, unx_mode);
390 if (!NT_STATUS_IS_OK(status)) {
391 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
392 "(flags=%d)\n",
393 path,nt_errstr(status),local_flags,flags));
394 return status;
395 }
396
397 if ((local_flags & O_CREAT) && !file_existed) {
398
399 /* Inherit the ACL if required */
400 if (lp_inherit_perms(SNUM(conn))) {
401 inherit_access_posix_acl(conn, parent_dir, path,
402 unx_mode);
403 }
404
405 /* Change the owner if required. */
406 if (lp_inherit_owner(SNUM(conn))) {
407 change_file_owner_to_parent(conn, parent_dir,
408 fsp);
409 }
410
411 notify_fname(conn, NOTIFY_ACTION_ADDED,
412 FILE_NOTIFY_CHANGE_FILE_NAME, path);
413 }
414
415 } else {
416 fsp->fh->fd = -1; /* What we used to call a stat open. */
417 if (file_existed) {
418 status = check_open_rights(conn,
419 path,
420 access_mask);
421 if (!NT_STATUS_IS_OK(status)) {
422 DEBUG(10, ("open_file: Access denied on "
423 "file %s\n",
424 path));
425 return status;
426 }
427 }
428 }
429
430 if (!file_existed) {
431 int ret;
432
433 if (fsp->fh->fd == -1) {
434 ret = SMB_VFS_STAT(conn, path, psbuf);
435 } else {
436 ret = SMB_VFS_FSTAT(fsp, psbuf);
437 /* If we have an fd, this stat should succeed. */
438 if (ret == -1) {
439 DEBUG(0,("Error doing fstat on open file %s "
440 "(%s)\n", path,strerror(errno) ));
441 }
442 }
443
444 /* For a non-io open, this stat failing means file not found. JRA */
445 if (ret == -1) {
446 status = map_nt_error_from_unix(errno);
447 fd_close(fsp);
448 return status;
449 }
450 }
451
452 /*
453 * POSIX allows read-only opens of directories. We don't
454 * want to do this (we use a different code path for this)
455 * so catch a directory open and return an EISDIR. JRA.
456 */
457
458 if(S_ISDIR(psbuf->st_mode)) {
459 fd_close(fsp);
460 errno = EISDIR;
461 return NT_STATUS_FILE_IS_A_DIRECTORY;
462 }
463
464 fsp->mode = psbuf->st_mode;
465 fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
466 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
467 fsp->file_pid = req ? req->smbpid : 0;
468 fsp->can_lock = True;
469 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
470 if (!CAN_WRITE(conn)) {
471 fsp->can_write = False;
472 } else {
473 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
474 True : False;
475 }
476 fsp->print_file = False;
477 fsp->modified = False;
478 fsp->sent_oplock_break = NO_BREAK_SENT;
479 fsp->is_directory = False;
480 if (conn->aio_write_behind_list &&
481 is_in_path(path, conn->aio_write_behind_list, conn->case_sensitive)) {
482 fsp->aio_write_behind = True;
483 }
484
485 string_set(&fsp->fsp_name, path);
486 fsp->wcp = NULL; /* Write cache pointer. */
487
488 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
489 conn->server_info->unix_name,
490 fsp->fsp_name,
491 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
492 conn->num_files_open));
493
494 errno = 0;
495 return NT_STATUS_OK;
496 }
497
498 /*******************************************************************
499 Return True if the filename is one of the special executable types.
500 ********************************************************************/
501
502 bool is_executable(const char *fname)
503 {
504 if ((fname = strrchr_m(fname,'.'))) {
505 if (strequal(fname,".com") ||
506 strequal(fname,".dll") ||
507 strequal(fname,".exe") ||
508 strequal(fname,".sym")) {
509 return True;
510 }
511 }
512 return False;
513 }
514
515 /****************************************************************************
516 Check if we can open a file with a share mode.
517 Returns True if conflict, False if not.
518 ****************************************************************************/
519
520 static bool share_conflict(struct share_mode_entry *entry,
521 uint32 access_mask,
522 uint32 share_access)
523 {
524 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
525 "entry->share_access = 0x%x, "
526 "entry->private_options = 0x%x\n",
527 (unsigned int)entry->access_mask,
528 (unsigned int)entry->share_access,
529 (unsigned int)entry->private_options));
530
531 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
532 (unsigned int)access_mask, (unsigned int)share_access));
533
534 if ((entry->access_mask & (FILE_WRITE_DATA|
535 FILE_APPEND_DATA|
536 FILE_READ_DATA|
537 FILE_EXECUTE|
538 DELETE_ACCESS)) == 0) {
539 DEBUG(10,("share_conflict: No conflict due to "
540 "entry->access_mask = 0x%x\n",
541 (unsigned int)entry->access_mask ));
542 return False;
543 }
544
545 if ((access_mask & (FILE_WRITE_DATA|
546 FILE_APPEND_DATA|
547 FILE_READ_DATA|
548 FILE_EXECUTE|
549 DELETE_ACCESS)) == 0) {
550 DEBUG(10,("share_conflict: No conflict due to "
551 "access_mask = 0x%x\n",
552 (unsigned int)access_mask ));
553 return False;
554 }
555
556 #if 1 /* JRA TEST - Superdebug. */
557 #define CHECK_MASK(num, am, right, sa, share) \
558 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
559 (unsigned int)(num), (unsigned int)(am), \
560 (unsigned int)(right), (unsigned int)(am)&(right) )); \
561 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
562 (unsigned int)(num), (unsigned int)(sa), \
563 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
564 if (((am) & (right)) && !((sa) & (share))) { \
565 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
566 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
567 (unsigned int)(share) )); \
568 return True; \
569 }
570 #else
571 #define CHECK_MASK(num, am, right, sa, share) \
572 if (((am) & (right)) && !((sa) & (share))) { \
573 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
574 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
575 (unsigned int)(share) )); \
576 return True; \
577 }
578 #endif
579
580 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
581 share_access, FILE_SHARE_WRITE);
582 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
583 entry->share_access, FILE_SHARE_WRITE);
584
585 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
586 share_access, FILE_SHARE_READ);
587 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
588 entry->share_access, FILE_SHARE_READ);
589
590 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
591 share_access, FILE_SHARE_DELETE);
592 CHECK_MASK(6, access_mask, DELETE_ACCESS,
593 entry->share_access, FILE_SHARE_DELETE);
594
595 DEBUG(10,("share_conflict: No conflict.\n"));
596 return False;
597 }
598
599 #if defined(DEVELOPER)
600 static void validate_my_share_entries(int num,
601 struct share_mode_entry *share_entry)
602 {
603 files_struct *fsp;
604
605 if (!procid_is_me(&share_entry->pid)) {
606 return;
607 }
608
609 if (is_deferred_open_entry(share_entry) &&
610 !open_was_deferred(share_entry->op_mid)) {
611 char *str = talloc_asprintf(talloc_tos(),
612 "Got a deferred entry without a request: "
613 "PANIC: %s\n",
614 share_mode_str(talloc_tos(), num, share_entry));
615 smb_panic(str);
616 }
617
618 if (!is_valid_share_mode_entry(share_entry)) {
619 return;
620 }
621
622 fsp = file_find_dif(share_entry->id,
623 share_entry->share_file_id);
624 if (!fsp) {
625 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
626 share_mode_str(talloc_tos(), num, share_entry) ));
627 smb_panic("validate_my_share_entries: Cannot match a "
628 "share entry with an open file\n");
629 }
630
631 if (is_deferred_open_entry(share_entry) ||
632 is_unused_share_mode_entry(share_entry)) {
633 goto panic;
634 }
635
636 if ((share_entry->op_type == NO_OPLOCK) &&
637 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
638 /* Someone has already written to it, but I haven't yet
639 * noticed */
640 return;
641 }
642
643 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
644 goto panic;
645 }
646
647 return;
648
649 panic:
650 {
651 char *str;
652 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
653 share_mode_str(talloc_tos(), num, share_entry) ));
654 str = talloc_asprintf(talloc_tos(),
655 "validate_my_share_entries: "
656 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
657 fsp->fsp_name, (unsigned int)fsp->oplock_type,
658 (unsigned int)share_entry->op_type );
659 smb_panic(str);
660 }
661 }
662 #endif
663
664 bool is_stat_open(uint32 access_mask)
665 {
666 return (access_mask &&
667 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
668 FILE_WRITE_ATTRIBUTES))==0) &&
669 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
670 FILE_WRITE_ATTRIBUTES)) != 0));
671 }
672
673 /****************************************************************************
674 Deal with share modes
675 Invarient: Share mode must be locked on entry and exit.
676 Returns -1 on error, or number of share modes on success (may be zero).
677 ****************************************************************************/
678
679 static NTSTATUS open_mode_check(connection_struct *conn,
680 const char *fname,
681 struct share_mode_lock *lck,
682 uint32 access_mask,
683 uint32 share_access,
684 uint32 create_options,
685 bool *file_existed)
686 {
687 int i;
688
689 if(lck->num_share_modes == 0) {
690 return NT_STATUS_OK;
691 }
692
693 *file_existed = True;
694
695 /* A delete on close prohibits everything */
696
697 if (lck->delete_on_close) {
698 return NT_STATUS_DELETE_PENDING;
699 }
700
701 if (is_stat_open(access_mask)) {
702 /* Stat open that doesn't trigger oplock breaks or share mode
703 * checks... ! JRA. */
704 return NT_STATUS_OK;
705 }
706
707 /*
708 * Check if the share modes will give us access.
709 */
710
711 #if defined(DEVELOPER)
712 for(i = 0; i < lck->num_share_modes; i++) {
713 validate_my_share_entries(i, &lck->share_modes[i]);
714 }
715 #endif
716
717 if (!lp_share_modes(SNUM(conn))) {
718 return NT_STATUS_OK;
719 }
720
721 /* Now we check the share modes, after any oplock breaks. */
722 for(i = 0; i < lck->num_share_modes; i++) {
723
724 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
725 continue;
726 }
727
728 /* someone else has a share lock on it, check to see if we can
729 * too */
730 if (share_conflict(&lck->share_modes[i],
731 access_mask, share_access)) {
732 return NT_STATUS_SHARING_VIOLATION;
733 }
734 }
735
736 return NT_STATUS_OK;
737 }
738
739 static bool is_delete_request(files_struct *fsp) {
740 return ((fsp->access_mask == DELETE_ACCESS) &&
741 (fsp->oplock_type == NO_OPLOCK));
742 }
743
744 /*
745 * 1) No files open at all or internal open: Grant whatever the client wants.
746 *
747 * 2) Exclusive (or batch) oplock around: If the requested access is a delete
748 * request, break if the oplock around is a batch oplock. If it's another
749 * requested access type, break.
750 *
751 * 3) Only level2 around: Grant level2 and do nothing else.
752 */
753
754 static bool delay_for_oplocks(struct share_mode_lock *lck,
755 files_struct *fsp,
756 uint16 mid,
757 int pass_number,
758 int oplock_request)
759 {
760 int i;
761 struct share_mode_entry *exclusive = NULL;
762 bool valid_entry = False;
763 bool delay_it = False;
764 bool have_level2 = False;
765 NTSTATUS status;
766 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
767
768 if (oplock_request & INTERNAL_OPEN_ONLY) {
769 fsp->oplock_type = NO_OPLOCK;
770 }
771
772 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
773 return False;
774 }
775
776 for (i=0; i<lck->num_share_modes; i++) {
777
778 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
779 continue;
780 }
781
782 /* At least one entry is not an invalid or deferred entry. */
783 valid_entry = True;
784
785 if (pass_number == 1) {
786 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
787 SMB_ASSERT(exclusive == NULL);
788 exclusive = &lck->share_modes[i];
789 }
790 } else {
791 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
792 SMB_ASSERT(exclusive == NULL);
793 exclusive = &lck->share_modes[i];
794 }
795 }
796
797 if (lck->share_modes[i].op_type == LEVEL_II_OPLOCK) {
798 SMB_ASSERT(exclusive == NULL);
799 have_level2 = True;
800 }
801 }
802
803 if (!valid_entry) {
804 /* All entries are placeholders or deferred.
805 * Directly grant whatever the client wants. */
806 if (fsp->oplock_type == NO_OPLOCK) {
807 /* Store a level2 oplock, but don't tell the client */
808 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
809 }
810 return False;
811 }
812
813 if (exclusive != NULL) { /* Found an exclusive oplock */
814 SMB_ASSERT(!have_level2);
815 delay_it = is_delete_request(fsp) ?
816 BATCH_OPLOCK_TYPE(exclusive->op_type) : True;
817 }
818
819 if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
820 /* We can at most grant level2 as there are other
821 * level2 or NO_OPLOCK entries. */
822 fsp->oplock_type = LEVEL_II_OPLOCK;
823 }
824
825 if ((fsp->oplock_type == NO_OPLOCK) && have_level2) {
826 /* Store a level2 oplock, but don't tell the client */
827 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
828 }
829
830 if (!delay_it) {
831 return False;
832 }
833
834 /*
835 * Send a break message to the oplock holder and delay the open for
836 * our client.
837 */
838
839 DEBUG(10, ("Sending break request to PID %s\n",
840 procid_str_static(&exclusive->pid)));
841 exclusive->op_mid = mid;
842
843 /* Create the message. */
844 share_mode_entry_to_message(msg, exclusive);
845
846 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
847 don't want this set in the share mode struct pointed to by lck. */
848
849 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
850 SSVAL(msg,6,exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
851 }
852
853 status = messaging_send_buf(smbd_messaging_context(), exclusive->pid,
854 MSG_SMB_BREAK_REQUEST,
855 (uint8 *)msg,
856 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
857 if (!NT_STATUS_IS_OK(status)) {
858 DEBUG(3, ("Could not send oplock break message: %s\n",
859 nt_errstr(status)));
860 }
861
862 return True;
863 }
864
865 bool request_timed_out(struct timeval request_time,
866 struct timeval timeout)
867 {
868 struct timeval now, end_time;
869 GetTimeOfDay(&now);
870 end_time = timeval_sum(&request_time, &timeout);
871 return (timeval_compare(&end_time, &now) < 0);
872 }
873
874 /****************************************************************************
875 Handle the 1 second delay in returning a SHARING_VIOLATION error.
876 ****************************************************************************/
877
878 static void defer_open(struct share_mode_lock *lck,
879 struct timeval request_time,
880 struct timeval timeout,
881 struct smb_request *req,
882 struct deferred_open_record *state)
883 {
884 int i;
885
886 /* Paranoia check */
887
888 for (i=0; i<lck->num_share_modes; i++) {
889 struct share_mode_entry *e = &lck->share_modes[i];
890
891 if (!is_deferred_open_entry(e)) {
892 continue;
893 }
894
895 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
896 DEBUG(0, ("Trying to defer an already deferred "
897 "request: mid=%d, exiting\n", req->mid));
898 exit_server("attempt to defer a deferred request");
899 }
900 }
901
902 /* End paranoia check */
903
904 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
905 "open entry for mid %u\n",
906 (unsigned int)request_time.tv_sec,
907 (unsigned int)request_time.tv_usec,
908 (unsigned int)req->mid));
909
910 if (!push_deferred_smb_message(req, request_time, timeout,
911 (char *)state, sizeof(*state))) {
912 exit_server("push_deferred_smb_message failed");
913 }
914 add_deferred_open(lck, req->mid, request_time, state->id);
915
916 /*
917 * Push the MID of this packet on the signing queue.
918 * We only do this once, the first time we push the packet
919 * onto the deferred open queue, as this has a side effect
920 * of incrementing the response sequence number.
921 */
922
923 srv_defer_sign_response(req->mid);
924 }
925
926
927 /****************************************************************************
928 On overwrite open ensure that the attributes match.
929 ****************************************************************************/
930
931 bool open_match_attributes(connection_struct *conn,
932 const char *path,
933 uint32 old_dos_attr,
934 uint32 new_dos_attr,
935 mode_t existing_unx_mode,
936 mode_t new_unx_mode,
937 mode_t *returned_unx_mode)
938 {
939 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
940
941 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
942 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
943
944 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
945 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
946 *returned_unx_mode = new_unx_mode;
947 } else {
948 *returned_unx_mode = (mode_t)0;
949 }
950
951 DEBUG(10,("open_match_attributes: file %s old_dos_attr = 0x%x, "
952 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
953 "returned_unx_mode = 0%o\n",
954 path,
955 (unsigned int)old_dos_attr,
956 (unsigned int)existing_unx_mode,
957 (unsigned int)new_dos_attr,
958 (unsigned int)*returned_unx_mode ));
959
960 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
961 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
962 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
963 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
964 return False;
965 }
966 }
967 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
968 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
969 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
970 return False;
971 }
972 }
973 return True;
974 }
975
976 /****************************************************************************
977 Special FCB or DOS processing in the case of a sharing violation.
978 Try and find a duplicated file handle.
979 ****************************************************************************/
980
981 NTSTATUS fcb_or_dos_open(struct smb_request *req,
982 connection_struct *conn,
983 files_struct *fsp_to_dup_into,
984 const char *fname,
985 struct file_id id,
986 uint16 file_pid,
987 uint16 vuid,
988 uint32 access_mask,
989 uint32 share_access,
990 uint32 create_options)
991 {
992 files_struct *fsp;
993
994 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
995 "file %s.\n", fname ));
996
997 for(fsp = file_find_di_first(id); fsp;
998 fsp = file_find_di_next(fsp)) {
999
1000 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1001 "vuid = %u, file_pid = %u, private_options = 0x%x "
1002 "access_mask = 0x%x\n", fsp->fsp_name,
1003 fsp->fh->fd, (unsigned int)fsp->vuid,
1004 (unsigned int)fsp->file_pid,
1005 (unsigned int)fsp->fh->private_options,
1006 (unsigned int)fsp->access_mask ));
1007
1008 if (fsp->fh->fd != -1 &&
1009 fsp->vuid == vuid &&
1010 fsp->file_pid == file_pid &&
1011 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1012 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1013 (fsp->access_mask & FILE_WRITE_DATA) &&
1014 strequal(fsp->fsp_name, fname)) {
1015 DEBUG(10,("fcb_or_dos_open: file match\n"));
1016 break;
1017 }
1018 }
1019
1020 if (!fsp) {
1021 return NT_STATUS_NOT_FOUND;
1022 }
1023
1024 /* quite an insane set of semantics ... */
1025 if (is_executable(fname) &&
1026 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1027 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1028 return NT_STATUS_INVALID_PARAMETER;
1029 }
1030
1031 /* We need to duplicate this fsp. */
1032 dup_file_fsp(req, fsp, access_mask, share_access,
1033 create_options, fsp_to_dup_into);
1034
1035 return NT_STATUS_OK;
1036 }
1037
1038 /****************************************************************************
1039 Open a file with a share mode - old openX method - map into NTCreate.
1040 ****************************************************************************/
1041
1042 bool map_open_params_to_ntcreate(const char *fname, int deny_mode, int open_func,
1043 uint32 *paccess_mask,
1044 uint32 *pshare_mode,
1045 uint32 *pcreate_disposition,
1046 uint32 *pcreate_options)
1047 {
1048 uint32 access_mask;
1049 uint32 share_mode;
1050 uint32 create_disposition;
1051 uint32 create_options = FILE_NON_DIRECTORY_FILE;
1052
1053 DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
1054 "open_func = 0x%x\n",
1055 fname, (unsigned int)deny_mode, (unsigned int)open_func ));
1056
1057 /* Create the NT compatible access_mask. */
1058 switch (GET_OPENX_MODE(deny_mode)) {
1059 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
1060 case DOS_OPEN_RDONLY:
1061 access_mask = FILE_GENERIC_READ;
1062 break;
1063 case DOS_OPEN_WRONLY:
1064 access_mask = FILE_GENERIC_WRITE;
1065 break;
1066 case DOS_OPEN_RDWR:
1067 case DOS_OPEN_FCB:
1068 access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
1069 break;
1070 default:
1071 DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
1072 (unsigned int)GET_OPENX_MODE(deny_mode)));
1073 return False;
1074 }
1075
1076 /* Create the NT compatible create_disposition. */
1077 switch (open_func) {
1078 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
1079 create_disposition = FILE_CREATE;
1080 break;
1081
1082 case OPENX_FILE_EXISTS_OPEN:
1083 create_disposition = FILE_OPEN;
1084 break;
1085
1086 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
1087 create_disposition = FILE_OPEN_IF;
1088 break;
1089
1090 case OPENX_FILE_EXISTS_TRUNCATE:
1091 create_disposition = FILE_OVERWRITE;
1092 break;
1093
1094 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
1095 create_disposition = FILE_OVERWRITE_IF;
1096 break;
1097
1098 default:
1099 /* From samba4 - to be confirmed. */
1100 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
1101 create_disposition = FILE_CREATE;
1102 break;
1103 }
1104 DEBUG(10,("map_open_params_to_ntcreate: bad "
1105 "open_func 0x%x\n", (unsigned int)open_func));
1106 return False;
1107 }
1108
1109 /* Create the NT compatible share modes. */
1110 switch (GET_DENY_MODE(deny_mode)) {
1111 case DENY_ALL:
1112 share_mode = FILE_SHARE_NONE;
1113 break;
1114
1115 case DENY_WRITE:
1116 share_mode = FILE_SHARE_READ;
1117 break;
1118
1119 case DENY_READ:
1120 share_mode = FILE_SHARE_WRITE;
1121 break;
1122
1123 case DENY_NONE:
1124 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1125 break;
1126
1127 case DENY_DOS:
1128 create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1129 if (is_executable(fname)) {
1130 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1131 } else {
1132 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1133 share_mode = FILE_SHARE_READ;
1134 } else {
1135 share_mode = FILE_SHARE_NONE;
1136 }
1137 }
1138 break;
1139
1140 case DENY_FCB:
1141 create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1142 share_mode = FILE_SHARE_NONE;
1143 break;
1144
1145 default:
1146 DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1147 (unsigned int)GET_DENY_MODE(deny_mode) ));
1148 return False;
1149 }
1150
1151 DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1152 "share_mode = 0x%x, create_disposition = 0x%x, "
1153 "create_options = 0x%x\n",
1154 fname,
1155 (unsigned int)access_mask,
1156 (unsigned int)share_mode,
1157 (unsigned int)create_disposition,
1158 (unsigned int)create_options ));
1159
1160 if (paccess_mask) {
1161 *paccess_mask = access_mask;
1162 }
1163 if (pshare_mode) {
1164 *pshare_mode = share_mode;
1165 }
1166 if (pcreate_disposition) {
1167 *pcreate_disposition = create_disposition;
1168 }
1169 if (pcreate_options) {
1170 *pcreate_options = create_options;
1171 }
1172
1173 return True;
1174
1175 }
1176
1177 static void schedule_defer_open(struct share_mode_lock *lck,
1178 struct timeval request_time,
1179 struct smb_request *req)
1180 {
1181 struct deferred_open_record state;
1182
1183 /* This is a relative time, added to the absolute
1184 request_time value to get the absolute timeout time.
1185 Note that if this is the second or greater time we enter
1186 this codepath for this particular request mid then
1187 request_time is left as the absolute time of the *first*
1188 time this request mid was processed. This is what allows
1189 the request to eventually time out. */
1190
1191 struct timeval timeout;
1192
1193 /* Normally the smbd we asked should respond within
1194 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1195 * the client did, give twice the timeout as a safety
1196 * measure here in case the other smbd is stuck
1197 * somewhere else. */
1198
1199 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1200
1201 /* Nothing actually uses state.delayed_for_oplocks
1202 but it's handy to differentiate in debug messages
1203 between a 30 second delay due to oplock break, and
1204 a 1 second delay for share mode conflicts. */
1205
1206 state.delayed_for_oplocks = True;
1207 state.id = lck->id;
1208
1209 if (!request_timed_out(request_time, timeout)) {
1210 defer_open(lck, request_time, timeout, req, &state);
1211 }
1212 }
1213
1214 /****************************************************************************
1215 Work out what access_mask to use from what the client sent us.
1216 ****************************************************************************/
1217
1218 static NTSTATUS calculate_access_mask(connection_struct *conn,
1219 const char *fname,
1220 bool file_existed,
1221 uint32_t access_mask,
1222 uint32_t *access_mask_out)
1223 {
1224 NTSTATUS status;
1225
1226 /*
1227 * Convert GENERIC bits to specific bits.
1228 */
1229
1230 se_map_generic(&access_mask, &file_generic_mapping);
1231
1232 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1233 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1234 if (file_existed) {
1235
1236 struct security_descriptor *sd;
1237 uint32_t access_granted = 0;
1238
1239 status = SMB_VFS_GET_NT_ACL(conn, fname,
1240 (OWNER_SECURITY_INFORMATION |
1241 GROUP_SECURITY_INFORMATION |
1242 DACL_SECURITY_INFORMATION),&sd);
1243
1244 if (!NT_STATUS_IS_OK(status)) {
1245 DEBUG(10, ("calculate_access_mask: Could not get acl "
1246 "on file %s: %s\n",
1247 fname,
1248 nt_errstr(status)));
1249 return NT_STATUS_ACCESS_DENIED;
1250 }
1251
1252 status = smb1_file_se_access_check(sd,
1253 conn->server_info->ptok,
1254 access_mask,
1255 &access_granted);
1256
1257 TALLOC_FREE(sd);
1258
1259 if (!NT_STATUS_IS_OK(status)) {
1260 DEBUG(10, ("calculate_access_mask: Access denied on "
1261 "file %s: when calculating maximum access\n",
1262 fname));
1263 return NT_STATUS_ACCESS_DENIED;
1264 }
1265
1266 access_mask = access_granted;
1267 } else {
1268 access_mask = FILE_GENERIC_ALL;
1269 }
1270 }
1271
1272 *access_mask_out = access_mask;
1273 return NT_STATUS_OK;
1274 }
1275
1276 /****************************************************************************
1277 Open a file with a share mode. Passed in an already created files_struct *.
1278 ****************************************************************************/
1279
1280 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1281 struct smb_request *req,
1282 const char *fname,
1283 SMB_STRUCT_STAT *psbuf,
1284 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1285 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1286 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1287 uint32 create_options, /* options such as delete on close. */
1288 uint32 new_dos_attributes, /* attributes used for new file. */
1289 int oplock_request, /* internal Samba oplock codes. */
1290 /* Information (FILE_EXISTS etc.) */
1291 int *pinfo,
1292 files_struct *fsp)
1293 {
1294 int flags=0;
1295 int flags2=0;
1296 bool file_existed = VALID_STAT(*psbuf);
1297 bool def_acl = False;
1298 bool posix_open = False;
1299 bool new_file_created = False;
1300 struct file_id id;
1301 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1302 mode_t new_unx_mode = (mode_t)0;
1303 mode_t unx_mode = (mode_t)0;
1304 int info;
1305 uint32 existing_dos_attributes = 0;
1306 struct pending_message_list *pml = NULL;
1307 struct timeval request_time = timeval_zero();
1308 struct share_mode_lock *lck = NULL;
1309 uint32 open_access_mask = access_mask;
1310 NTSTATUS status;
1311 int ret_flock;
1312 char *parent_dir;
1313 const char *newname;
1314
1315 ZERO_STRUCT(id);
1316
1317 if (conn->printer) {
1318 /*
1319 * Printers are handled completely differently.
1320 * Most of the passed parameters are ignored.
1321 */
1322
1323 if (pinfo) {
1324 *pinfo = FILE_WAS_CREATED;
1325 }
1326
1327 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n", fname));
1328
1329 return print_fsp_open(req, conn, fname, req->vuid, fsp);
1330 }
1331
1332 if (!parent_dirname_talloc(talloc_tos(), fname, &parent_dir,
1333 &newname)) {
1334 return NT_STATUS_NO_MEMORY;
1335 }
1336
1337 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1338 posix_open = True;
1339 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1340 new_dos_attributes = 0;
1341 } else {
1342 /* We add aARCH to this as this mode is only used if the file is
1343 * created new. */
1344 unx_mode = unix_mode(conn, new_dos_attributes | aARCH, fname,
1345 parent_dir);
1346 }
1347
1348 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1349 "access_mask=0x%x share_access=0x%x "
1350 "create_disposition = 0x%x create_options=0x%x "
1351 "unix mode=0%o oplock_request=%d\n",
1352 fname, new_dos_attributes, access_mask, share_access,
1353 create_disposition, create_options, unx_mode,
1354 oplock_request));
1355
1356 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1357 DEBUG(0, ("No smb request but not an internal only open!\n"));
1358 return NT_STATUS_INTERNAL_ERROR;
1359 }
1360
1361 /*
1362 * Only non-internal opens can be deferred at all
1363 */
1364
1365 if ((req != NULL)
1366 && ((pml = get_open_deferred_message(req->mid)) != NULL)) {
1367 struct deferred_open_record *state =
1368 (struct deferred_open_record *)pml->private_data.data;
1369
1370 /* Remember the absolute time of the original
1371 request with this mid. We'll use it later to
1372 see if this has timed out. */
1373
1374 request_time = pml->request_time;
1375
1376 /* Remove the deferred open entry under lock. */
1377 lck = get_share_mode_lock(talloc_tos(), state->id, NULL, NULL,
1378 NULL);
1379 if (lck == NULL) {
1380 DEBUG(0, ("could not get share mode lock\n"));
1381 } else {
1382 del_deferred_open_entry(lck, req->mid);
1383 TALLOC_FREE(lck);
1384 }
1385
1386 /* Ensure we don't reprocess this message. */
1387 remove_deferred_open_smb_message(req->mid);
1388 }
1389
1390 status = check_name(conn, fname);
1391 if (!NT_STATUS_IS_OK(status)) {
1392 return status;
1393 }
1394
1395 if (!posix_open) {
1396 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1397 if (file_existed) {
1398 existing_dos_attributes = dos_mode(conn, fname, psbuf);
1399 }
1400 }
1401
1402 /* ignore any oplock requests if oplocks are disabled */
1403 if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break ||
1404 IS_VETO_OPLOCK_PATH(conn, fname)) {
1405 /* Mask off everything except the private Samba bits. */
1406 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1407 }
1408
1409 /* this is for OS/2 long file names - say we don't support them */
1410 if (!lp_posix_pathnames() && strstr(fname,".+,;=[].")) {
1411 /* OS/2 Workplace shell fix may be main code stream in a later
1412 * release. */
1413 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1414 "supported.\n"));
1415 if (use_nt_status()) {
1416 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1417 }
1418 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1419 }
1420
1421 switch( create_disposition ) {
1422 /*
1423 * Currently we're using FILE_SUPERSEDE as the same as
1424 * FILE_OVERWRITE_IF but they really are
1425 * different. FILE_SUPERSEDE deletes an existing file
1426 * (requiring delete access) then recreates it.
1427 */
1428 case FILE_SUPERSEDE:
1429 /* If file exists replace/overwrite. If file doesn't
1430 * exist create. */
1431 flags2 |= (O_CREAT | O_TRUNC);
1432 break;
1433
1434 case FILE_OVERWRITE_IF:
1435 /* If file exists replace/overwrite. If file doesn't
1436 * exist create. */
1437 flags2 |= (O_CREAT | O_TRUNC);
1438 break;
1439
1440 case FILE_OPEN:
1441 /* If file exists open. If file doesn't exist error. */
1442 if (!file_existed) {
1443 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1444 "requested for file %s and file "
1445 "doesn't exist.\n", fname ));
1446 errno = ENOENT;
1447 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1448 }
1449 break;
1450
1451 case FILE_OVERWRITE:
1452 /* If file exists overwrite. If file doesn't exist
1453 * error. */
1454 if (!file_existed) {
1455 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1456 "requested for file %s and file "
1457 "doesn't exist.\n", fname ));
1458 errno = ENOENT;
1459 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1460 }
1461 flags2 |= O_TRUNC;
1462 break;
1463
1464 case FILE_CREATE:
1465 /* If file exists error. If file doesn't exist
1466 * create. */
1467 if (file_existed) {
1468 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1469 "requested for file %s and file "
1470 "already exists.\n", fname ));
1471 if (S_ISDIR(psbuf->st_mode)) {
1472 errno = EISDIR;
1473 } else {
1474 errno = EEXIST;
1475 }
1476 return map_nt_error_from_unix(errno);
1477 }
1478 flags2 |= (O_CREAT|O_EXCL);
1479 break;
1480
1481 case FILE_OPEN_IF:
1482 /* If file exists open. If file doesn't exist
1483 * create. */
1484 flags2 |= O_CREAT;
1485 break;
1486
1487 default:
1488 return NT_STATUS_INVALID_PARAMETER;
1489 }
1490
1491 /* We only care about matching attributes on file exists and
1492 * overwrite. */
1493
1494 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1495 (create_disposition == FILE_OVERWRITE_IF))) {
1496 if (!open_match_attributes(conn, fname,
1497 existing_dos_attributes,
1498 new_dos_attributes, psbuf->st_mode,
1499 unx_mode, &new_unx_mode)) {
1500 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1501 "for file %s (%x %x) (0%o, 0%o)\n",
1502 fname, existing_dos_attributes,
1503 new_dos_attributes,
1504 (unsigned int)psbuf->st_mode,
1505 (unsigned int)unx_mode ));
1506 errno = EACCES;
1507 return NT_STATUS_ACCESS_DENIED;
1508 }
1509 }
1510
1511 status = calculate_access_mask(conn, fname, file_existed,
1512 access_mask,
1513 &access_mask);
1514 if (!NT_STATUS_IS_OK(status)) {
1515 DEBUG(10, ("open_file_ntcreate: calculate_access_mask "
1516 "on file %s returned %s\n",
1517 fname,
1518 nt_errstr(status)));
1519 return status;
1520 }
1521
1522 open_access_mask = access_mask;
1523
1524 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1525 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1526 }
1527
1528 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1529 "access_mask=0x%x\n", fname, access_mask ));
1530
1531 /*
1532 * Note that we ignore the append flag as append does not
1533 * mean the same thing under DOS and Unix.
1534 */
1535
1536 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1537 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1538 /* DENY_DOS opens are always underlying read-write on the
1539 file handle, no matter what the requested access mask
1540 says. */
1541 if ((create_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1542 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1543 flags = O_RDWR;
1544 } else {
1545 flags = O_WRONLY;
1546 }
1547 } else {
1548 flags = O_RDONLY;
1549 }
1550
1551 /*
1552 * Currently we only look at FILE_WRITE_THROUGH for create options.
1553 */
1554
1555 #if defined(O_SYNC)
1556 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1557 flags2 |= O_SYNC;
1558 }
1559 #endif /* O_SYNC */
1560
1561 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1562 flags2 |= O_APPEND;
1563 }
1564
1565 if (!posix_open && !CAN_WRITE(conn)) {
1566 /*
1567 * We should really return a permission denied error if either
1568 * O_CREAT or O_TRUNC are set, but for compatibility with
1569 * older versions of Samba we just AND them out.
1570 */
1571 flags2 &= ~(O_CREAT|O_TRUNC);
1572 }
1573
1574 /*
1575 * Ensure we can't write on a read-only share or file.
1576 */
1577
1578 if (flags != O_RDONLY && file_existed &&
1579 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1580 DEBUG(5,("open_file_ntcreate: write access requested for "
1581 "file %s on read only %s\n",
1582 fname, !CAN_WRITE(conn) ? "share" : "file" ));
1583 errno = EACCES;
1584 return NT_STATUS_ACCESS_DENIED;
1585 }
1586
1587 fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
1588 fsp->share_access = share_access;
1589 fsp->fh->private_options = create_options;
1590 fsp->access_mask = open_access_mask; /* We change this to the
1591 * requested access_mask after
1592 * the open is done. */
1593 fsp->posix_open = posix_open;
1594
1595 /* Ensure no SAMBA_PRIVATE bits can be set. */
1596 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1597
1598 if (timeval_is_zero(&request_time)) {
1599 request_time = fsp->open_time;
1600 }
1601
1602 if (file_existed) {
1603 struct timespec old_write_time = get_mtimespec(psbuf);
1604 id = vfs_file_id_from_sbuf(conn, psbuf);
1605
1606 lck = get_share_mode_lock(talloc_tos(), id,
1607 conn->connectpath,
1608 fname, &old_write_time);
1609
1610 if (lck == NULL) {
1611 DEBUG(0, ("Could not get share mode lock\n"));
1612 return NT_STATUS_SHARING_VIOLATION;
1613 }
1614
1615 /* First pass - send break only on batch oplocks. */
1616 if ((req != NULL)
1617 && delay_for_oplocks(lck, fsp, req->mid, 1,
1618 oplock_request)) {
1619 schedule_defer_open(lck, request_time, req);
1620 TALLOC_FREE(lck);
1621 return NT_STATUS_SHARING_VIOLATION;
1622 }
1623
1624 /* Use the client requested access mask here, not the one we
1625 * open with. */
1626 status = open_mode_check(conn, fname, lck,
1627 access_mask, share_access,
1628 create_options, &file_existed);
1629
1630 if (NT_STATUS_IS_OK(status)) {
1631 /* We might be going to allow this open. Check oplock
1632 * status again. */
1633 /* Second pass - send break for both batch or
1634 * exclusive oplocks. */
1635 if ((req != NULL)
1636 && delay_for_oplocks(lck, fsp, req->mid, 2,
1637 oplock_request)) {
1638 schedule_defer_open(lck, request_time, req);
1639 TALLOC_FREE(lck);
1640 return NT_STATUS_SHARING_VIOLATION;
1641 }
1642 }
1643
1644 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1645 /* DELETE_PENDING is not deferred for a second */
1646 TALLOC_FREE(lck);
1647 return status;
1648 }
1649
1650 if (!NT_STATUS_IS_OK(status)) {
1651 uint32 can_access_mask;
1652 bool can_access = True;
1653
1654 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1655
1656 /* Check if this can be done with the deny_dos and fcb
1657 * calls. */
1658 if (create_options &
1659 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1660 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1661 if (req == NULL) {
1662 DEBUG(0, ("DOS open without an SMB "
1663 "request!\n"));
1664 TALLOC_FREE(lck);
1665 return NT_STATUS_INTERNAL_ERROR;
1666 }
1667
1668 /* Use the client requested access mask here,
1669 * not the one we open with. */
1670 status = fcb_or_dos_open(req,
1671 conn,
1672 fsp,
1673 fname,
1674 id,
1675 req->smbpid,
1676 req->vuid,
1677 access_mask,
1678 share_access,
1679 create_options);
1680
1681 if (NT_STATUS_IS_OK(status)) {
1682 TALLOC_FREE(lck);
1683 if (pinfo) {
1684 *pinfo = FILE_WAS_OPENED;
1685 }
1686 return NT_STATUS_OK;
1687 }
1688 }
1689
1690 /*
1691 * This next line is a subtlety we need for
1692 * MS-Access. If a file open will fail due to share
1693 * permissions and also for security (access) reasons,
1694 * we need to return the access failed error, not the
1695 * share error. We can't open the file due to kernel
1696 * oplock deadlock (it's possible we failed above on
1697 * the open_mode_check()) so use a userspace check.
1698 */
1699
1700 if (flags & O_RDWR) {
1701 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1702 } else if (flags & O_WRONLY) {
1703 can_access_mask = FILE_WRITE_DATA;
1704 } else {
1705 can_access_mask = FILE_READ_DATA;
1706 }
1707
1708 if (((can_access_mask & FILE_WRITE_DATA) && !CAN_WRITE(conn)) ||
1709 !can_access_file_data(conn,fname,psbuf,can_access_mask)) {
1710 can_access = False;
1711 }
1712
1713 /*
1714 * If we're returning a share violation, ensure we
1715 * cope with the braindead 1 second delay.
1716 */
1717
1718 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1719 lp_defer_sharing_violations()) {
1720 struct timeval timeout;
1721 struct deferred_open_record state;
1722 int timeout_usecs;
1723
1724 /* this is a hack to speed up torture tests
1725 in 'make test' */
1726 timeout_usecs = lp_parm_int(SNUM(conn),
1727 "smbd","sharedelay",
1728 SHARING_VIOLATION_USEC_WAIT);
1729
1730 /* This is a relative time, added to the absolute
1731 request_time value to get the absolute timeout time.
1732 Note that if this is the second or greater time we enter
1733 this codepath for this particular request mid then
1734 request_time is left as the absolute time of the *first*
1735 time this request mid was processed. This is what allows
1736 the request to eventually time out. */
1737
1738 timeout = timeval_set(0, timeout_usecs);
1739
1740 /* Nothing actually uses state.delayed_for_oplocks
1741 but it's handy to differentiate in debug messages
1742 between a 30 second delay due to oplock break, and
1743 a 1 second delay for share mode conflicts. */
1744
1745 state.delayed_for_oplocks = False;
1746 state.id = id;
1747
1748 if ((req != NULL)
1749 && !request_timed_out(request_time,
1750 timeout)) {
1751 defer_open(lck, request_time, timeout,
1752 req, &state);
1753 }
1754 }
1755
1756 TALLOC_FREE(lck);
1757 if (can_access) {
1758 /*
1759 * We have detected a sharing violation here
1760 * so return the correct error code
1761 */
1762 status = NT_STATUS_SHARING_VIOLATION;
1763 } else {
1764 status = NT_STATUS_ACCESS_DENIED;
1765 }
1766 return status;
1767 }
1768
1769 /*
1770 * We exit this block with the share entry *locked*.....
1771 */
1772 }
1773
1774 SMB_ASSERT(!file_existed || (lck != NULL));
1775
1776 /*
1777 * Ensure we pay attention to default ACLs on directories if required.
1778 */
1779
1780 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1781 (def_acl = directory_has_default_acl(conn, parent_dir))) {
1782 unx_mode = 0777;
1783 }
1784
1785 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1786 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1787 (unsigned int)flags, (unsigned int)flags2,
1788 (unsigned int)unx_mode, (unsigned int)access_mask,
1789 (unsigned int)open_access_mask));
1790
1791 /*
1792 * open_file strips any O_TRUNC flags itself.
1793 */
1794
1795 fsp_open = open_file(fsp, conn, req, parent_dir, newname, fname, psbuf,
1796 flags|flags2, unx_mode, access_mask,
1797 open_access_mask);
1798
1799 if (!NT_STATUS_IS_OK(fsp_open)) {
1800 if (lck != NULL) {
1801 TALLOC_FREE(lck);
1802 }
1803 return fsp_open;
1804 }
1805
1806 if (!file_existed) {
1807 struct timespec old_write_time = get_mtimespec(psbuf);
1808 /*
1809 * Deal with the race condition where two smbd's detect the
1810 * file doesn't exist and do the create at the same time. One
1811 * of them will win and set a share mode, the other (ie. this
1812 * one) should check if the requested share mode for this
1813 * create is allowed.
1814 */
1815
1816 /*
1817 * Now the file exists and fsp is successfully opened,
1818 * fsp->dev and fsp->inode are valid and should replace the
1819 * dev=0,inode=0 from a non existent file. Spotted by
1820 * Nadav Danieli <nadavd@exanet.com>. JRA.
1821 */
1822
1823 id = fsp->file_id;
1824
1825 lck = get_share_mode_lock(talloc_tos(), id,
1826 conn->connectpath,
1827 fname, &old_write_time);
1828
1829 if (lck == NULL) {
1830 DEBUG(0, ("open_file_ntcreate: Could not get share "
1831 "mode lock for %s\n", fname));
1832 fd_close(fsp);
1833 return NT_STATUS_SHARING_VIOLATION;
1834 }
1835
1836 /* First pass - send break only on batch oplocks. */
1837 if ((req != NULL)
1838 && delay_for_oplocks(lck, fsp, req->mid, 1,
1839 oplock_request)) {
1840 schedule_defer_open(lck, request_time, req);
1841 TALLOC_FREE(lck);
1842 fd_close(fsp);
1843 return NT_STATUS_SHARING_VIOLATION;
1844 }
1845
1846 status = open_mode_check(conn, fname, lck,
1847 access_mask, share_access,
1848 create_options, &file_existed);
1849
1850 if (NT_STATUS_IS_OK(status)) {
1851 /* We might be going to allow this open. Check oplock
1852 * status again. */
1853 /* Second pass - send break for both batch or
1854 * exclusive oplocks. */
1855 if ((req != NULL)
1856 && delay_for_oplocks(lck, fsp, req->mid, 2,
1857 oplock_request)) {
1858 schedule_defer_open(lck, request_time, req);
1859 TALLOC_FREE(lck);
1860 fd_close(fsp);
1861 return NT_STATUS_SHARING_VIOLATION;
1862 }
1863 }
1864
1865 if (!NT_STATUS_IS_OK(status)) {
1866 struct deferred_open_record state;
1867
1868 fd_close(fsp);
1869
1870 state.delayed_for_oplocks = False;
1871 state.id = id;
1872
1873 /* Do it all over again immediately. In the second
1874 * round we will find that the file existed and handle
1875 * the DELETE_PENDING and FCB cases correctly. No need
1876 * to duplicate the code here. Essentially this is a
1877 * "goto top of this function", but don't tell
1878 * anybody... */
1879
1880 if (req != NULL) {
1881 defer_open(lck, request_time, timeval_zero(),
1882 req, &state);
1883 }
1884 TALLOC_FREE(lck);
1885 return status;
1886 }
1887
1888 /*
1889 * We exit this block with the share entry *locked*.....
1890 */
1891
1892 }
1893
1894 SMB_ASSERT(lck != NULL);
1895
1896 /* note that we ignore failure for the following. It is
1897 basically a hack for NFS, and NFS will never set one of
1898 these only read them. Nobody but Samba can ever set a deny
1899 mode and we have already checked our more authoritative
1900 locking database for permission to set this deny mode. If
1901 the kernel refuses the operations then the kernel is wrong.
1902 note that GPFS supports it as well - jmcd */
1903
1904 if (fsp->fh->fd != -1) {
1905 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access);
1906 if(ret_flock == -1 ){
1907
1908 TALLOC_FREE(lck);
1909 fd_close(fsp);
1910
1911 return NT_STATUS_SHARING_VIOLATION;
1912 }
1913 }
1914
1915 /*
1916 * At this point onwards, we can guarentee that the share entry
1917 * is locked, whether we created the file or not, and that the
1918 * deny mode is compatible with all current opens.
1919 */
1920
1921 /*
1922 * If requested, truncate the file.
1923 */
1924
1925 if (flags2&O_TRUNC) {
1926 /*
1927 * We are modifing the file after open - update the stat
1928 * struct..
1929 */
1930 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
1931 (SMB_VFS_FSTAT(fsp, psbuf)==-1)) {
1932 status = map_nt_error_from_unix(errno);
1933 TALLOC_FREE(lck);
1934 fd_close(fsp);
1935 return status;
1936 }
1937 }
1938
1939 /* Record the options we were opened with. */
1940 fsp->share_access = share_access;
1941 fsp->fh->private_options = create_options;
1942 /*
1943 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
1944 */
1945 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
1946
1947 if (file_existed) {
1948 /* stat opens on existing files don't get oplocks. */
1949 if (is_stat_open(open_access_mask)) {
1950 fsp->oplock_type = NO_OPLOCK;
1951 }
1952
1953 if (!(flags2 & O_TRUNC)) {
1954 info = FILE_WAS_OPENED;
1955 } else {
1956 info = FILE_WAS_OVERWRITTEN;
1957 }
1958 } else {
1959 info = FILE_WAS_CREATED;
1960 }
1961
1962 if (pinfo) {
1963 *pinfo = info;
1964 }
1965
1966 /*
1967 * Setup the oplock info in both the shared memory and
1968 * file structs.
1969 */
1970
1971 if ((fsp->oplock_type != NO_OPLOCK) &&
1972 (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK)) {
1973 if (!set_file_oplock(fsp, fsp->oplock_type)) {
1974 /* Could not get the kernel oplock */
1975 fsp->oplock_type = NO_OPLOCK;
1976 }
1977 }
1978
1979 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
1980 new_file_created = True;
1981 }
1982
1983 set_share_mode(lck, fsp, conn->server_info->utok.uid, 0,
1984 fsp->oplock_type);
1985
1986 /* Handle strange delete on close create semantics. */
1987 if (create_options & FILE_DELETE_ON_CLOSE) {
1988
1989 status = can_set_delete_on_close(fsp, True, new_dos_attributes);
1990
1991 if (!NT_STATUS_IS_OK(status)) {
1992 /* Remember to delete the mode we just added. */
1993 del_share_mode(lck, fsp);
1994 TALLOC_FREE(lck);
1995 fd_close(fsp);
1996 return status;
1997 }
1998 /* Note that here we set the *inital* delete on close flag,
1999 not the regular one. The magic gets handled in close. */
2000 fsp->initial_delete_on_close = True;
2001 }
2002
2003 if (new_file_created) {
2004 /* Files should be initially set as archive */
2005 if (lp_map_archive(SNUM(conn)) ||
2006 lp_store_dos_attributes(SNUM(conn))) {
2007 if (!posix_open) {
2008 SMB_STRUCT_STAT tmp_sbuf;
2009 SET_STAT_INVALID(tmp_sbuf);
2010 if (file_set_dosmode(
2011 conn, fname,
2012 new_dos_attributes | aARCH,
2013 &tmp_sbuf, parent_dir,
2014 true) == 0) {
2015 unx_mode = tmp_sbuf.st_mode;
2016 }
2017 }
2018 }
2019 }
2020
2021 /*
2022 * Take care of inherited ACLs on created files - if default ACL not
2023 * selected.
2024 */
2025
2026 if (!posix_open && !file_existed && !def_acl) {
2027
2028 int saved_errno = errno; /* We might get ENOSYS in the next
2029 * call.. */
2030
2031 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2032 errno == ENOSYS) {
2033 errno = saved_errno; /* Ignore ENOSYS */
2034 }
2035
2036 } else if (new_unx_mode) {
2037
2038 int ret = -1;
2039
2040 /* Attributes need changing. File already existed. */
2041
2042 {
2043 int saved_errno = errno; /* We might get ENOSYS in the
2044 * next call.. */
2045 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2046
2047 if (ret == -1 && errno == ENOSYS) {
2048 errno = saved_errno; /* Ignore ENOSYS */
2049 } else {
2050 DEBUG(5, ("open_file_ntcreate: reset "
2051 "attributes of file %s to 0%o\n",
2052 fname, (unsigned int)new_unx_mode));
2053 ret = 0; /* Don't do the fchmod below. */
2054 }
2055 }
2056
2057 if ((ret == -1) &&
2058 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2059 DEBUG(5, ("open_file_ntcreate: failed to reset "
2060 "attributes of file %s to 0%o\n",
2061 fname, (unsigned int)new_unx_mode));
2062 }
2063
2064 /* If this is a successful open, we must remove any deferred open
2065 * records. */
2066 if (req != NULL) {
2067 del_deferred_open_entry(lck, req->mid);
2068 }
2069 TALLOC_FREE(lck);
2070
2071 return NT_STATUS_OK;
2072 }
2073
2074
2075 /****************************************************************************
2076 Open a file for for write to ensure that we can fchmod it.
2077 ****************************************************************************/
2078
2079 NTSTATUS open_file_fchmod(struct smb_request *req, connection_struct *conn,
2080 const char *fname,
2081 SMB_STRUCT_STAT *psbuf, files_struct **result)
2082 {
2083 files_struct *fsp = NULL;
2084 NTSTATUS status;
2085
2086 if (!VALID_STAT(*psbuf)) {
2087 return NT_STATUS_INVALID_PARAMETER;
2088 }
2089
2090 status = file_new(req, conn, &fsp);
2091 if(!NT_STATUS_IS_OK(status)) {
2092 return status;
2093 }
2094
2095 status = SMB_VFS_CREATE_FILE(
2096 conn, /* conn */
2097 NULL, /* req */
2098 0, /* root_dir_fid */
2099 fname, /* fname */
2100 0, /* create_file_flags */
2101 FILE_WRITE_DATA, /* access_mask */
2102 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2103 FILE_SHARE_DELETE),
2104 FILE_OPEN, /* create_disposition*/
2105 0, /* create_options */
2106 0, /* file_attributes */
2107 0, /* oplock_request */
2108 0, /* allocation_size */
2109 NULL, /* sd */
2110 NULL, /* ea_list */
2111 &fsp, /* result */
2112 NULL, /* pinfo */
2113 psbuf); /* psbuf */
2114
2115 /*
2116 * This is not a user visible file open.
2117 * Don't set a share mode.
2118 */
2119
2120 if (!NT_STATUS_IS_OK(status)) {
2121 file_free(req, fsp);
2122 return status;
2123 }
2124
2125 *result = fsp;
2126 return NT_STATUS_OK;
2127 }
2128
2129 /****************************************************************************
2130 Close the fchmod file fd - ensure no locks are lost.
2131 ****************************************************************************/
2132
2133 NTSTATUS close_file_fchmod(struct smb_request *req, files_struct *fsp)
2134 {
2135 NTSTATUS status = fd_close(fsp);
2136 file_free(req, fsp);
2137 return status;
2138 }
2139
2140 static NTSTATUS mkdir_internal(connection_struct *conn,
2141 const char *name,
2142 uint32 file_attributes,
2143 SMB_STRUCT_STAT *psbuf)
2144 {
2145 mode_t mode;
2146 char *parent_dir;
2147 const char *dirname;
2148 NTSTATUS status;
2149 bool posix_open = false;
2150
2151 if(!CAN_WRITE(conn)) {
2152 DEBUG(5,("mkdir_internal: failing create on read-only share "
2153 "%s\n", lp_servicename(SNUM(conn))));
2154 return NT_STATUS_ACCESS_DENIED;
2155 }
2156
2157 status = check_name(conn, name);
2158 if (!NT_STATUS_IS_OK(status)) {
2159 return status;
2160 }
2161
2162 if (!parent_dirname_talloc(talloc_tos(), name, &parent_dir,
2163 &dirname)) {
2164 return NT_STATUS_NO_MEMORY;
2165 }
2166
2167 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2168 posix_open = true;
2169 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2170 } else {
2171 mode = unix_mode(conn, aDIR, name, parent_dir);
2172 }
2173
2174 if (SMB_VFS_MKDIR(conn, name, mode) != 0) {
2175 return map_nt_error_from_unix(errno);
2176 }
2177
2178 /* Ensure we're checking for a symlink here.... */
2179 /* We don't want to get caught by a symlink racer. */
2180
2181 if (SMB_VFS_LSTAT(conn, name, psbuf) == -1) {
2182 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2183 name, strerror(errno)));
2184 return map_nt_error_from_unix(errno);
2185 }
2186
2187 if (!S_ISDIR(psbuf->st_mode)) {
2188 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2189 name));
2190 return NT_STATUS_ACCESS_DENIED;
2191 }
2192
2193 if (lp_store_dos_attributes(SNUM(conn))) {
2194 if (!posix_open) {
2195 file_set_dosmode(conn, name,
2196 file_attributes | aDIR, NULL,
2197 parent_dir,
2198 true);
2199 }
2200 }
2201
2202 if (lp_inherit_perms(SNUM(conn))) {
2203 inherit_access_posix_acl(conn, parent_dir, name, mode);
2204 }
2205
2206 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2207 /*
2208 * Check if high bits should have been set,
2209 * then (if bits are missing): add them.
2210 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2211 * dir.
2212 */
2213 if (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO) && (mode & ~psbuf->st_mode)) {
2214 SMB_VFS_CHMOD(conn, name,
2215 psbuf->st_mode | (mode & ~psbuf->st_mode));
2216 }
2217 }
2218
2219 /* Change the owner if required. */
2220 if (lp_inherit_owner(SNUM(conn))) {
2221 change_dir_owner_to_parent(conn, parent_dir, name, psbuf);
2222 }
2223
2224 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2225 name);
2226
2227 return NT_STATUS_OK;
2228 }
2229
2230 /****************************************************************************
2231 Open a directory from an NT SMB call.
2232 ****************************************************************************/
2233
2234 static NTSTATUS open_directory(connection_struct *conn,
2235 struct smb_request *req,
2236 const char *fname,
2237 SMB_STRUCT_STAT *psbuf,
2238 uint32 access_mask,
2239 uint32 share_access,
2240 uint32 create_disposition,
2241 uint32 create_options,
2242 uint32 file_attributes,
2243 int *pinfo,
2244 files_struct **result)
2245 {
2246 files_struct *fsp = NULL;
2247 bool dir_existed = VALID_STAT(*psbuf) ? True : False;
2248 struct share_mode_lock *lck = NULL;
2249 NTSTATUS status;
2250 struct timespec mtimespec;
2251 int info = 0;
2252
2253 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2254 "share_access = 0x%x create_options = 0x%x, "
2255 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2256 fname,
2257 (unsigned int)access_mask,
2258 (unsigned int)share_access,
2259 (unsigned int)create_options,
2260 (unsigned int)create_disposition,
2261 (unsigned int)file_attributes));
2262
2263 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2264 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2265 is_ntfs_stream_name(fname)) {
2266 DEBUG(2, ("open_directory: %s is a stream name!\n", fname));
2267 return NT_STATUS_NOT_A_DIRECTORY;
2268 }
2269
2270 status = calculate_access_mask(conn, fname, dir_existed,
2271 access_mask,
2272 &access_mask);
2273 if (!NT_STATUS_IS_OK(status)) {
2274 DEBUG(10, ("open_directory: calculate_access_mask "
2275 "on file %s returned %s\n",
2276 fname,
2277 nt_errstr(status)));
2278 return status;
2279 }
2280
2281 switch( create_disposition ) {
2282 case FILE_OPEN:
2283
2284 info = FILE_WAS_OPENED;
2285
2286 /*
2287 * We want to follow symlinks here.
2288 */
2289
2290 if (SMB_VFS_STAT(conn, fname, psbuf) != 0) {
2291 return map_nt_error_from_unix(errno);
2292 }
2293
2294 break;
2295
2296 case FILE_CREATE:
2297
2298 /* If directory exists error. If directory doesn't
2299 * exist create. */
2300
2301 status = mkdir_internal(conn,
2302 fname,
2303 file_attributes,
2304 psbuf);
2305
2306 if (!NT_STATUS_IS_OK(status)) {
2307 DEBUG(2, ("open_directory: unable to create "
2308 "%s. Error was %s\n", fname,
2309 nt_errstr(status)));
2310 return status;
2311 }
2312
2313 info = FILE_WAS_CREATED;
2314 break;
2315
2316 case FILE_OPEN_IF:
2317 /*
2318 * If directory exists open. If directory doesn't
2319 * exist create.
2320 */
2321
2322 status = mkdir_internal(conn,
2323 fname,
2324 file_attributes,
2325 psbuf);
2326
2327 if (NT_STATUS_IS_OK(status)) {
2328 info = FILE_WAS_CREATED;
2329 }
2330
2331 if (NT_STATUS_EQUAL(status,
2332 NT_STATUS_OBJECT_NAME_COLLISION)) {
2333 info = FILE_WAS_OPENED;
2334 status = NT_STATUS_OK;
2335 }
2336
2337 break;
2338
2339 case FILE_SUPERSEDE:
2340 case FILE_OVERWRITE:
2341 case FILE_OVERWRITE_IF:
2342 default:
2343 DEBUG(5,("open_directory: invalid create_disposition "
2344 "0x%x for directory %s\n",
2345 (unsigned int)create_disposition, fname));
2346 return NT_STATUS_INVALID_PARAMETER;
2347 }
2348
2349 if(!S_ISDIR(psbuf->st_mode)) {
2350 DEBUG(5,("open_directory: %s is not a directory !\n",
2351 fname ));
2352 return NT_STATUS_NOT_A_DIRECTORY;
2353 }
2354
2355 if (info == FILE_WAS_OPENED) {
2356 status = check_open_rights(conn,
2357 fname,
2358 access_mask);
2359 if (!NT_STATUS_IS_OK(status)) {
2360 DEBUG(10, ("open_directory: check_open_rights on "
2361 "file %s failed with %s\n",
2362 fname,
2363 nt_errstr(status)));
2364 return status;
2365 }
2366 }
2367
2368 status = file_new(req, conn, &fsp);
2369 if(!NT_STATUS_IS_OK(status)) {
2370 return status;
2371 }
2372
2373 /*
2374 * Setup the files_struct for it.
2375 */
2376
2377 fsp->mode = psbuf->st_mode;
2378 fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
2379 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2380 fsp->file_pid = req ? req->smbpid : 0;
2381 fsp->can_lock = False;
2382 fsp->can_read = False;
2383 fsp->can_write = False;
2384
2385 fsp->share_access = share_access;
2386 fsp->fh->private_options = create_options;
2387 /*
2388 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2389 */
2390 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2391 fsp->print_file = False;
2392 fsp->modified = False;
2393 fsp->oplock_type = NO_OPLOCK;
2394 fsp->sent_oplock_break = NO_BREAK_SENT;
2395 fsp->is_directory = True;
2396 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2397
2398 string_set(&fsp->fsp_name,fname);
2399
2400 mtimespec = get_mtimespec(psbuf);
2401
2402 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2403 conn->connectpath,
2404 fname, &mtimespec);
2405
2406 if (lck == NULL) {
2407 DEBUG(0, ("open_directory: Could not get share mode lock for %s\n", fname));
2408 file_free(req, fsp);
2409 return NT_STATUS_SHARING_VIOLATION;
2410 }
2411
2412 status = open_mode_check(conn, fname, lck,
2413 access_mask, share_access,
2414 create_options, &dir_existed);
2415
2416 if (!NT_STATUS_IS_OK(status)) {
2417 TALLOC_FREE(lck);
2418 file_free(req, fsp);
2419 return status;
2420 }
2421
2422 set_share_mode(lck, fsp, conn->server_info->utok.uid, 0, NO_OPLOCK);
2423
2424 /* For directories the delete on close bit at open time seems
2425 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2426 if (create_options & FILE_DELETE_ON_CLOSE) {
2427 status = can_set_delete_on_close(fsp, True, 0);
2428 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2429 TALLOC_FREE(lck);
2430 file_free(req, fsp);
2431 return status;
2432 }
2433
2434 if (NT_STATUS_IS_OK(status)) {
2435 /* Note that here we set the *inital* delete on close flag,
2436 not the regular one. The magic gets handled in close. */
2437 fsp->initial_delete_on_close = True;
2438 }
2439 }
2440
2441 TALLOC_FREE(lck);
2442
2443 if (pinfo) {
2444 *pinfo = info;
2445 }
2446
2447 *result = fsp;
2448 return NT_STATUS_OK;
2449 }
2450
2451 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req, const char *directory)
2452 {
2453 NTSTATUS status;
2454 SMB_STRUCT_STAT sbuf;
2455 files_struct *fsp;
2456
2457 SET_STAT_INVALID(sbuf);
2458
2459 status = SMB_VFS_CREATE_FILE(
2460 conn, /* conn */
2461 req, /* req */
2462 0, /* root_dir_fid */
2463 directory, /* fname */
2464 0, /* create_file_flags */
2465 FILE_READ_ATTRIBUTES, /* access_mask */
2466 FILE_SHARE_NONE, /* share_access */
2467 FILE_CREATE, /* create_disposition*/
2468 FILE_DIRECTORY_FILE, /* create_options */
2469 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2470 0, /* oplock_request */
2471 0, /* allocation_size */
2472 NULL, /* sd */
2473 NULL, /* ea_list */
2474 &fsp, /* result */
2475 NULL, /* pinfo */
2476 &sbuf); /* psbuf */
2477
2478 if (NT_STATUS_IS_OK(status)) {
2479 close_file(req, fsp, NORMAL_CLOSE);
2480 }
2481
2482 return status;
2483 }
2484
2485 /****************************************************************************
2486 Receive notification that one of our open files has been renamed by another
2487 smbd process.
2488 ****************************************************************************/
2489
2490 void msg_file_was_renamed(struct messaging_context *msg,
2491 void *private_data,
2492 uint32_t msg_type,
2493 struct server_id server_id,
2494 DATA_BLOB *data)
2495 {
2496 files_struct *fsp;
2497 char *frm = (char *)data->data;
2498 struct file_id id;
2499 const char *sharepath;
2500 const char *newname;
2501 size_t sp_len;
2502
2503 if (data->data == NULL
2504 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2505 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2506 (int)data->length));
2507 return;
2508 }
2509
2510 /* Unpack the message. */
2511 pull_file_id_16(frm, &id);
2512 sharepath = &frm[16];
2513 newname = sharepath + strlen(sharepath) + 1;
2514 sp_len = strlen(sharepath);
2515
2516 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2517 "file_id %s\n",
2518 sharepath, newname, file_id_string_tos(&id)));
2519
2520 for(fsp = file_find_di_first(id); fsp; fsp = file_find_di_next(fsp)) {
2521 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2522 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2523 fsp->fnum, fsp->fsp_name, newname ));
2524 string_set(&fsp->fsp_name, newname);
2525 } else {
2526 /* TODO. JRA. */
2527 /* Now we have the complete path we can work out if this is
2528 actually within this share and adjust newname accordingly. */
2529 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2530 "not sharepath %s) "
2531 "fnum %d from %s -> %s\n",
2532 fsp->conn->connectpath,
2533 sharepath,
2534 fsp->fnum,
2535 fsp->fsp_name,
2536 newname ));
2537 }
2538 }
2539 }
2540
2541 struct case_semantics_state {
2542 connection_struct *conn;
2543 bool case_sensitive;
2544 bool case_preserve;
2545 bool short_case_preserve;
2546 };
2547
2548 /****************************************************************************
2549 Restore case semantics.
2550 ****************************************************************************/
2551 static int restore_case_semantics(struct case_semantics_state *state)
2552 {
2553 state->conn->case_sensitive = state->case_sensitive;
2554 state->conn->case_preserve = state->case_preserve;
2555 state->conn->short_case_preserve = state->short_case_preserve;
2556 return 0;
2557 }
2558
2559 /****************************************************************************
2560 Save case semantics.
2561 ****************************************************************************/
2562 struct case_semantics_state *set_posix_case_semantics(TALLOC_CTX *mem_ctx,
2563 connection_struct *conn)
2564 {
2565 struct case_semantics_state *result;
2566
2567 if (!(result = talloc(mem_ctx, struct case_semantics_state))) {
2568 DEBUG(0, ("talloc failed\n"));
2569 return NULL;
2570 }
2571
2572 result->conn = conn;
2573 result->case_sensitive = conn->case_sensitive;
2574 result->case_preserve = conn->case_preserve;
2575 result->short_case_preserve = conn->short_case_preserve;
2576
2577 /* Set to POSIX. */
2578 conn->case_sensitive = True;
2579 conn->case_preserve = True;
2580 conn->short_case_preserve = True;
2581
2582 talloc_set_destructor(result, restore_case_semantics);
2583
2584 return result;
2585 }
2586
2587 /*
2588 * If a main file is opened for delete, all streams need to be checked for
2589 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2590 * If that works, delete them all by setting the delete on close and close.
2591 */
2592
2593 static NTSTATUS open_streams_for_delete(connection_struct *conn,
2594 const char *fname)
2595 {
2596 struct stream_struct *stream_info;
2597 files_struct **streams;
2598 int i;
2599 unsigned int num_streams;
2600 TALLOC_CTX *frame = talloc_stackframe();
2601 NTSTATUS status;
2602
2603 status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
2604 &num_streams, &stream_info);
2605
2606 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2607 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2608 DEBUG(10, ("no streams around\n"));
2609 TALLOC_FREE(frame);
2610 return NT_STATUS_OK;
2611 }
2612
2613 if (!NT_STATUS_IS_OK(status)) {
2614 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
2615 nt_errstr(status)));
2616 goto fail;
2617 }
2618
2619 DEBUG(10, ("open_streams_for_delete found %d streams\n",
2620 num_streams));
2621
2622 if (num_streams == 0) {
2623 TALLOC_FREE(frame);
2624 return NT_STATUS_OK;
2625 }
2626
2627 streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
2628 if (streams == NULL) {
2629 DEBUG(0, ("talloc failed\n"));
2630 status = NT_STATUS_NO_MEMORY;
2631 goto fail;
2632 }
2633
2634 for (i=0; i<num_streams; i++) {
2635 char *streamname;
2636
2637 if (strequal(stream_info[i].name, "::$DATA")) {
2638 streams[i] = NULL;
2639 continue;
2640 }
2641
2642 streamname = talloc_asprintf(talloc_tos(), "%s%s", fname,
2643 stream_info[i].name);
2644
2645 if (streamname == NULL) {
2646 DEBUG(0, ("talloc_aprintf failed\n"));
2647 status = NT_STATUS_NO_MEMORY;
2648 goto fail;
2649 }
2650
2651 status = create_file_unixpath
2652 (conn, /* conn */
2653 NULL, /* req */
2654 streamname, /* fname */
2655 DELETE_ACCESS, /* access_mask */
2656 FILE_SHARE_READ | FILE_SHARE_WRITE
2657 | FILE_SHARE_DELETE, /* share_access */
2658 FILE_OPEN, /* create_disposition*/
2659 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* create_options */
2660 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
2661 0, /* oplock_request */
2662 0, /* allocation_size */
2663 NULL, /* sd */
2664 NULL, /* ea_list */
2665 &streams[i], /* result */
2666 NULL, /* pinfo */
2667 NULL); /* psbuf */
2668
2669 TALLOC_FREE(streamname);
2670
2671 if (!NT_STATUS_IS_OK(status)) {
2672 DEBUG(10, ("Could not open stream %s: %s\n",
2673 streamname, nt_errstr(status)));
2674 break;
2675 }
2676 }
2677
2678 /*
2679 * don't touch the variable "status" beyond this point :-)
2680 */
2681
2682 for (i -= 1 ; i >= 0; i--) {
2683 if (streams[i] == NULL) {
2684 continue;
2685 }
2686
2687 DEBUG(10, ("Closing stream # %d, %s\n", i,
2688 streams[i]->fsp_name));
2689 close_file(NULL, streams[i], NORMAL_CLOSE);
2690 }
2691
2692 fail:
2693 TALLOC_FREE(frame);
2694 return status;
2695 }
2696
2697 /*
2698 * Wrapper around open_file_ntcreate and open_directory
2699 */
2700
2701 static NTSTATUS create_file_unixpath(connection_struct *conn,
2702 struct smb_request *req,
2703 const char *fname,
2704 uint32_t access_mask,
2705 uint32_t share_access,
2706 uint32_t create_disposition,
2707 uint32_t create_options,
2708 uint32_t file_attributes,
2709 uint32_t oplock_request,
2710 uint64_t allocation_size,
2711 struct security_descriptor *sd,
2712 struct ea_list *ea_list,
2713
2714 files_struct **result,
2715 int *pinfo,
2716 SMB_STRUCT_STAT *psbuf)
2717 {
2718 SMB_STRUCT_STAT sbuf;
2719 int info = FILE_WAS_OPENED;
2720 files_struct *base_fsp = NULL;
2721 files_struct *fsp = NULL;
2722 NTSTATUS status;
2723
2724 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
2725 "file_attributes = 0x%x, share_access = 0x%x, "
2726 "create_disposition = 0x%x create_options = 0x%x "
2727 "oplock_request = 0x%x ea_list = 0x%p, sd = 0x%p, "
2728 "fname = %s\n",
2729 (unsigned int)access_mask,
2730 (unsigned int)file_attributes,
2731 (unsigned int)share_access,
2732 (unsigned int)create_disposition,
2733 (unsigned int)create_options,
2734 (unsigned int)oplock_request,
2735 ea_list, sd, fname));
2736
2737 if (create_options & FILE_OPEN_BY_FILE_ID) {
2738 status = NT_STATUS_NOT_SUPPORTED;
2739 goto fail;
2740 }
2741
2742 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
2743 status = NT_STATUS_INVALID_PARAMETER;
2744 goto fail;
2745 }
2746
2747 if (req == NULL) {
2748 oplock_request |= INTERNAL_OPEN_ONLY;
2749 }
2750
2751 if (psbuf != NULL) {
2752 sbuf = *psbuf;
2753 }
2754 else {
2755 if (SMB_VFS_STAT(conn, fname, &sbuf) == -1) {
2756 SET_STAT_INVALID(sbuf);
2757 }
2758 }
2759
2760 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2761 && (access_mask & DELETE_ACCESS)
2762 && !is_ntfs_stream_name(fname)) {
2763 /*
2764 * We can't open a file with DELETE access if any of the
2765 * streams is open without FILE_SHARE_DELETE
2766 */
2767 status = open_streams_for_delete(conn, fname);
2768
2769 if (!NT_STATUS_IS_OK(status)) {
2770 goto fail;
2771 }
2772 }
2773
2774 /* This is the correct thing to do (check every time) but can_delete
2775 * is expensive (it may have to read the parent directory
2776 * permissions). So for now we're not doing it unless we have a strong
2777 * hint the client is really going to delete this file. If the client
2778 * is forcing FILE_CREATE let the filesystem take care of the
2779 * permissions. */
2780
2781 /* Setting FILE_SHARE_DELETE is the hint. */
2782
2783 if (lp_acl_check_permissions(SNUM(conn))
2784 && (create_disposition != FILE_CREATE)
2785 && (share_access & FILE_SHARE_DELETE)
2786 && (access_mask & DELETE_ACCESS)
2787 && (!can_delete_file_in_directory(conn, fname))) {
2788 status = NT_STATUS_ACCESS_DENIED;
2789 goto fail;
2790 }
2791
2792 #if 0
2793 /* We need to support SeSecurityPrivilege for this. */
2794 if ((access_mask & SEC_RIGHT_SYSTEM_SECURITY) &&
2795 !user_has_privileges(current_user.nt_user_token,
2796 &se_security)) {
2797 status = NT_STATUS_PRIVILEGE_NOT_HELD;
2798 goto fail;
2799 }
2800 #endif
2801
2802 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2803 && is_ntfs_stream_name(fname)
2804 && (!(create_options & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
2805 char *base;
2806 uint32 base_create_disposition;
2807
2808 if (create_options & FILE_DIRECTORY_FILE) {
2809 status = NT_STATUS_NOT_A_DIRECTORY;
2810 goto fail;
2811 }
2812
2813 status = split_ntfs_stream_name(talloc_tos(), fname,
2814 &base, NULL);
2815 if (!NT_STATUS_IS_OK(status)) {
2816 DEBUG(10, ("create_file_unixpath: "
2817 "split_ntfs_stream_name failed: %s\n",
2818 nt_errstr(status)));
2819 goto fail;
2820 }
2821
2822 SMB_ASSERT(!is_ntfs_stream_name(base)); /* paranoia.. */
2823
2824 switch (create_disposition) {
2825 case FILE_OPEN:
2826 base_create_disposition = FILE_OPEN;
2827 break;
2828 default:
2829 base_create_disposition = FILE_OPEN_IF;
2830 break;
2831 }
2832
2833 status = create_file_unixpath(conn, NULL, base, 0,
2834 FILE_SHARE_READ
2835 | FILE_SHARE_WRITE
2836 | FILE_SHARE_DELETE,
2837 base_create_disposition,
2838 0, 0, 0, 0, NULL, NULL,
2839 &base_fsp, NULL, NULL);
2840 if (!NT_STATUS_IS_OK(status)) {
2841 DEBUG(10, ("create_file_unixpath for base %s failed: "
2842 "%s\n", base, nt_errstr(status)));
2843 goto fail;
2844 }
2845 /* we don't need to low level fd */
2846 fd_close(base_fsp);
2847 }
2848
2849 /*
2850 * If it's a request for a directory open, deal with it separately.
2851 */
2852
2853 if (create_options & FILE_DIRECTORY_FILE) {
2854
2855 if (create_options & FILE_NON_DIRECTORY_FILE) {
2856 status = NT_STATUS_INVALID_PARAMETER;
2857 goto fail;
2858 }
2859
2860 /* Can't open a temp directory. IFS kit test. */
2861 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2862 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
2863 status = NT_STATUS_INVALID_PARAMETER;
2864 goto fail;
2865 }
2866
2867 /*
2868 * We will get a create directory here if the Win32
2869 * app specified a security descriptor in the
2870 * CreateDirectory() call.
2871 */
2872
2873 oplock_request = 0;
2874 status = open_directory(
2875 conn, req, fname, &sbuf, access_mask, share_access,
2876 create_disposition, create_options, file_attributes,
2877 &info, &fsp);
2878 } else {
2879
2880 /*
2881 * Ordinary file case.
2882 */
2883
2884 status = file_new(req, conn, &fsp);
2885 if(!NT_STATUS_IS_OK(status)) {
2886 goto fail;
2887 }
2888
2889 /*
2890 * We're opening the stream element of a base_fsp
2891 * we already opened. Set up the base_fsp pointer.
2892 */
2893 if (base_fsp) {
2894 fsp->base_fsp = base_fsp;
2895 }
2896
2897 status = open_file_ntcreate(conn,
2898 req,
2899 fname,
2900 &sbuf,
2901 access_mask,
2902 share_access,
2903 create_disposition,
2904 create_options,
2905 file_attributes,
2906 oplock_request,
2907 &info,
2908 fsp);
2909
2910 if(!NT_STATUS_IS_OK(status)) {
2911 file_free(req, fsp);
2912 fsp = NULL;
2913 }
2914
2915 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
2916
2917 /* A stream open never opens a directory */
2918
2919 if (base_fsp) {
2920 status = NT_STATUS_FILE_IS_A_DIRECTORY;
2921 goto fail;
2922 }
2923
2924 /*
2925 * Fail the open if it was explicitly a non-directory
2926 * file.
2927 */
2928
2929 if (create_options & FILE_NON_DIRECTORY_FILE) {
2930 status = NT_STATUS_FILE_IS_A_DIRECTORY;
2931 goto fail;
2932 }
2933
2934 oplock_request = 0;
2935 status = open_directory(
2936 conn, req, fname, &sbuf, access_mask,
2937 share_access, create_disposition,
2938 create_options, file_attributes,
2939 &info, &fsp);
2940 }
2941 }
2942
2943 if (!NT_STATUS_IS_OK(status)) {
2944 goto fail;
2945 }
2946
2947 fsp->base_fsp = base_fsp;
2948
2949 /*
2950 * According to the MS documentation, the only time the security
2951 * descriptor is applied to the opened file is iff we *created* the
2952 * file; an existing file stays the same.
2953 *
2954 * Also, it seems (from observation) that you can open the file with
2955 * any access mask but you can still write the sd. We need to override
2956 * the granted access before we call set_sd
2957 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
2958 */
2959
2960 if ((sd != NULL) && (info == FILE_WAS_CREATED)
2961 && lp_nt_acl_support(SNUM(conn))) {
2962
2963 uint32_t sec_info_sent;
2964 uint32_t saved_access_mask = fsp->access_mask;
2965
2966 sec_info_sent = get_sec_info(sd);
2967
2968 fsp->access_mask = FILE_GENERIC_ALL;
2969
2970 /* Convert all the generic bits. */
2971 security_acl_map_generic(sd->dacl, &file_generic_mapping);
2972 security_acl_map_generic(sd->sacl, &file_generic_mapping);
2973
2974 if (sec_info_sent & (OWNER_SECURITY_INFORMATION|
2975 GROUP_SECURITY_INFORMATION|
2976 DACL_SECURITY_INFORMATION|
2977 SACL_SECURITY_INFORMATION)) {
2978 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
2979 }
2980
2981 fsp->access_mask = saved_access_mask;
2982
2983 if (!NT_STATUS_IS_OK(status)) {
2984 goto fail;
2985 }
2986 }
2987
2988 if ((ea_list != NULL) && (info == FILE_WAS_CREATED)) {
2989 status = set_ea(conn, fsp, fname, ea_list);
2990 if (!NT_STATUS_IS_OK(status)) {
2991 goto fail;
2992 }
2993 }
2994
2995 if (!fsp->is_directory && S_ISDIR(sbuf.st_mode)) {
2996 status = NT_STATUS_ACCESS_DENIED;
2997 goto fail;
2998 }
2999
3000 /* Save the requested allocation size. */
3001 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3002 if (allocation_size
3003 && (allocation_size > sbuf.st_size)) {
3004 fsp->initial_allocation_size = smb_roundup(
3005 fsp->conn, allocation_size);
3006 if (fsp->is_directory) {
3007 /* Can't set allocation size on a directory. */
3008 status = NT_STATUS_ACCESS_DENIED;
3009 goto fail;
3010 }
3011 if (vfs_allocate_file_space(
3012 fsp, fsp->initial_allocation_size) == -1) {
3013 status = NT_STATUS_DISK_FULL;
3014 goto fail;
3015 }
3016 } else {
3017 fsp->initial_allocation_size = smb_roundup(
3018 fsp->conn, (uint64_t)sbuf.st_size);
3019 }
3020 }
3021
3022 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3023
3024 *result = fsp;
3025 if (pinfo != NULL) {
3026 *pinfo = info;
3027 }
3028 if (psbuf != NULL) {
3029 if ((fsp->fh == NULL) || (fsp->fh->fd == -1)) {
3030 *psbuf = sbuf;
3031 }
3032 else {
3033 SMB_VFS_FSTAT(fsp, psbuf);
3034 }
3035 }
3036 return NT_STATUS_OK;
3037
3038 fail:
3039 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3040
3041 if (fsp != NULL) {
3042 if (base_fsp && fsp->base_fsp == base_fsp) {
3043 /*
3044 * The close_file below will close
3045 * fsp->base_fsp.
3046 */
3047 base_fsp = NULL;
3048 }
3049 close_file(req, fsp, ERROR_CLOSE);
3050 fsp = NULL;
3051 }
3052 if (base_fsp != NULL) {
3053 close_file(req, base_fsp, ERROR_CLOSE);
3054 base_fsp = NULL;
3055 }
3056 return status;
3057 }
3058
3059 /*
3060 * Calculate the full path name given a relative fid.
3061 */
3062 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3063 struct smb_request *req,
3064 uint16_t root_dir_fid,
3065 const char *fname, char **new_fname)
3066 {
3067 files_struct *dir_fsp;
3068 char *parent_fname = NULL;
3069
3070 if (root_dir_fid == 0 || !fname || !new_fname || !*new_fname) {
3071 return NT_STATUS_INTERNAL_ERROR;
3072 }
3073
3074 dir_fsp = file_fsp(req, root_dir_fid);
3075
3076 if (dir_fsp == NULL) {
3077 return NT_STATUS_INVALID_HANDLE;
3078 }
3079
3080 if (!dir_fsp->is_directory) {
3081
3082 /*
3083 * Check to see if this is a mac fork of some kind.
3084 */
3085
3086 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3087 is_ntfs_stream_name(fname)) {
3088 return NT_STATUS_OBJECT_PATH_NOT_FOUND;
3089 }
3090
3091 /*
3092 we need to handle the case when we get a
3093 relative open relative to a file and the
3094 pathname is blank - this is a reopen!
3095 (hint from demyn plantenberg)
3096 */
3097
3098 return NT_STATUS_INVALID_HANDLE;
3099 }
3100
3101 if (ISDOT(dir_fsp->fsp_name)) {
3102 /*
3103 * We're at the toplevel dir, the final file name
3104 * must not contain ./, as this is filtered out
3105 * normally by srvstr_get_path and unix_convert
3106 * explicitly rejects paths containing ./.
3107 */
3108 parent_fname = talloc_strdup(talloc_tos(), "");
3109 if (parent_fname == NULL) {
3110 return NT_STATUS_NO_MEMORY;
3111 }
3112 } else {
3113 size_t dir_name_len = strlen(dir_fsp->fsp_name);
3114
3115 /*
3116 * Copy in the base directory name.
3117 */
3118
3119 parent_fname = TALLOC_ARRAY(talloc_tos(), char,
3120 dir_name_len+2);
3121 if (parent_fname == NULL) {
3122 return NT_STATUS_NO_MEMORY;
3123 }
3124 memcpy(parent_fname, dir_fsp->fsp_name,
3125 dir_name_len+1);
3126
3127 /*
3128 * Ensure it ends in a '/'.
3129 * We used TALLOC_SIZE +2 to add space for the '/'.
3130 */
3131
3132 if(dir_name_len
3133 && (parent_fname[dir_name_len-1] != '\\')
3134 && (parent_fname[dir_name_len-1] != '/')) {
3135 parent_fname[dir_name_len] = '/';
3136 parent_fname[dir_name_len+1] = '\0';
3137 }
3138 }
3139
3140 *new_fname = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3141 fname);
3142 if (*new_fname == NULL) {
3143 return NT_STATUS_NO_MEMORY;
3144 }
3145
3146 return NT_STATUS_OK;
3147 }
3148
3149 NTSTATUS create_file_default(connection_struct *conn,
3150 struct smb_request *req,
3151 uint16_t root_dir_fid,
3152 const char *fname,
3153 uint32_t create_file_flags,
3154 uint32_t access_mask,
3155 uint32_t share_access,
3156 uint32_t create_disposition,
3157 uint32_t create_options,
3158 uint32_t file_attributes,
3159 uint32_t oplock_request,
3160 uint64_t allocation_size,
3161 struct security_descriptor *sd,
3162 struct ea_list *ea_list,
3163
3164 files_struct **result,
3165 int *pinfo,
3166 SMB_STRUCT_STAT *psbuf)
3167 {
3168 struct case_semantics_state *case_state = NULL;
3169 SMB_STRUCT_STAT sbuf;
3170 int info = FILE_WAS_OPENED;
3171 files_struct *fsp = NULL;
3172 NTSTATUS status;
3173
3174 DEBUG(10,("create_file: access_mask = 0x%x "
3175 "file_attributes = 0x%x, share_access = 0x%x, "
3176 "create_disposition = 0x%x create_options = 0x%x "
3177 "oplock_request = 0x%x "
3178 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3179 "create_file_flags = 0x%x, fname = %s\n",
3180 (unsigned int)access_mask,
3181 (unsigned int)file_attributes,
3182 (unsigned int)share_access,
3183 (unsigned int)create_disposition,
3184 (unsigned int)create_options,
3185 (unsigned int)oplock_request,
3186 (unsigned int)root_dir_fid,
3187 ea_list, sd, create_file_flags, fname));
3188
3189 /*
3190 * Calculate the filename from the root_dir_if if necessary.
3191 */
3192
3193 if (root_dir_fid != 0) {
3194 char *new_fname;
3195
3196 status = get_relative_fid_filename(conn, req, root_dir_fid,
3197 fname, &new_fname);
3198 if (!NT_STATUS_IS_OK(status)) {
3199 goto fail;
3200 }
3201
3202 fname = new_fname;
3203 }
3204
3205 /*
3206 * Check to see if this is a mac fork of some kind.
3207 */
3208
3209 if (is_ntfs_stream_name(fname)) {
3210 enum FAKE_FILE_TYPE fake_file_type;
3211
3212 fake_file_type = is_fake_file(fname);
3213
3214 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3215
3216 /*
3217 * Here we go! support for changing the disk quotas
3218 * --metze
3219 *
3220 * We need to fake up to open this MAGIC QUOTA file
3221 * and return a valid FID.
3222 *
3223 * w2k close this file directly after openening xp
3224 * also tries a QUERY_FILE_INFO on the file and then
3225 * close it
3226 */
3227 status = open_fake_file(req, conn, req->vuid,
3228 fake_file_type, fname,
3229 access_mask, &fsp);
3230 if (!NT_STATUS_IS_OK(status)) {
3231 goto fail;
3232 }
3233
3234 ZERO_STRUCT(sbuf);
3235 goto done;
3236 }
3237
3238 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3239 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3240 goto fail;
3241 }
3242 }
3243
3244 if ((req != NULL) && (req->flags2 & FLAGS2_DFS_PATHNAMES)) {
3245 char *resolved_fname;
3246
3247 status = resolve_dfspath(talloc_tos(), conn, true, fname,
3248 &resolved_fname);
3249
3250 if (!NT_STATUS_IS_OK(status)) {
3251 /*
3252 * For PATH_NOT_COVERED we had
3253 * reply_botherror(req, NT_STATUS_PATH_NOT_COVERED,
3254 * ERRSRV, ERRbadpath);
3255 * Need to fix in callers
3256 */
3257 goto fail;
3258 }
3259 fname = resolved_fname;
3260 }
3261
3262 /*
3263 * Check if POSIX semantics are wanted.
3264 */
3265
3266 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3267 case_state = set_posix_case_semantics(talloc_tos(), conn);
3268 }
3269
3270 if (create_file_flags & CFF_DOS_PATH) {
3271 char *converted_fname;
3272
3273 SET_STAT_INVALID(sbuf);
3274
3275 status = unix_convert(talloc_tos(), conn, fname, False,
3276 &converted_fname, NULL, &sbuf);
3277 if (!NT_STATUS_IS_OK(status)) {
3278 goto fail;
3279 }
3280 fname = converted_fname;
3281 } else {
3282 if (psbuf != NULL) {
3283 sbuf = *psbuf;
3284 } else {
3285 if (SMB_VFS_STAT(conn, fname, &sbuf) == -1) {
3286 SET_STAT_INVALID(sbuf);
3287 }
3288 }
3289
3290 }
3291
3292 TALLOC_FREE(case_state);
3293
3294 /* All file access must go through check_name() */
3295
3296 status = check_name(conn, fname);
3297 if (!NT_STATUS_IS_OK(status)) {
3298 goto fail;
3299 }
3300
3301 status = create_file_unixpath(
3302 conn, req, fname, access_mask, share_access,
3303 create_disposition, create_options, file_attributes,
3304 oplock_request, allocation_size, sd, ea_list,
3305 &fsp, &info, &sbuf);
3306
3307 if (!NT_STATUS_IS_OK(status)) {
3308 goto fail;
3309 }
3310
3311 done:
3312 DEBUG(10, ("create_file: info=%d\n", info));
3313
3314 *result = fsp;
3315 if (pinfo != NULL) {
3316 *pinfo = info;
3317 }
3318 if (psbuf != NULL) {
3319 *psbuf = sbuf;
3320 }
3321 return NT_STATUS_OK;
3322
3323 fail:
3324 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3325
3326 if (fsp != NULL) {
3327 close_file(req, fsp, ERROR_CLOSE);
3328 fsp = NULL;
3329 }
3330 return status;
3331 }
WIP