?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
s3:smbd: make smbd_calculate_access_mask() non-static
[Samba/gebeck_regimport.git] / source3 / smbd / open.c
blob96faf0f4b79d94dfc6fec18b96538ec7c751731b
1 /*
2 Unix SMB/CIFS implementation.
3 file opening and share modes
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2004
6 Copyright (C) Volker Lendecke 2005
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "system/filesys.h"
24 #include "printing.h"
25 #include "smbd/smbd.h"
26 #include "smbd/globals.h"
27 #include "fake_file.h"
28 #include "../libcli/security/security.h"
29 #include "../librpc/gen_ndr/ndr_security.h"
30 #include "auth.h"
31 #include "messages.h"
32
33 extern const struct generic_mapping file_generic_mapping;
34
35 struct deferred_open_record {
36 bool delayed_for_oplocks;
37 struct file_id id;
38 };
39
40 /****************************************************************************
41 SMB1 file varient of se_access_check. Never test FILE_READ_ATTRIBUTES.
42 ****************************************************************************/
43
44 NTSTATUS smb1_file_se_access_check(struct connection_struct *conn,
45 const struct security_descriptor *sd,
46 const struct security_token *token,
47 uint32_t access_desired,
48 uint32_t *access_granted)
49 {
50 *access_granted = 0;
51
52 if (get_current_uid(conn) == (uid_t)0) {
53 /* I'm sorry sir, I didn't know you were root... */
54 *access_granted = access_desired;
55 if (access_desired & SEC_FLAG_MAXIMUM_ALLOWED) {
56 *access_granted |= FILE_GENERIC_ALL;
57 }
58 return NT_STATUS_OK;
59 }
60
61 return se_access_check(sd,
62 token,
63 (access_desired & ~FILE_READ_ATTRIBUTES),
64 access_granted);
65 }
66
67 /****************************************************************************
68 Check if we have open rights.
69 ****************************************************************************/
70
71 NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
72 const struct smb_filename *smb_fname,
73 uint32_t access_mask,
74 uint32_t *access_granted)
75 {
76 /* Check if we have rights to open. */
77 NTSTATUS status;
78 struct security_descriptor *sd = NULL;
79 uint32_t rejected_share_access;
80
81 rejected_share_access = access_mask & ~(conn->share_access);
82
83 if (rejected_share_access) {
84 *access_granted = rejected_share_access;
85 return NT_STATUS_ACCESS_DENIED;
86 }
87
88 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
89 *access_granted = access_mask;
90
91 DEBUG(10,("smbd_check_open_rights: not checking ACL "
92 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
93 smb_fname_str_dbg(smb_fname),
94 (unsigned int)*access_granted ));
95 return NT_STATUS_OK;
96 }
97
98 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
99 (SECINFO_OWNER |
100 SECINFO_GROUP |
101 SECINFO_DACL),&sd);
102
103 if (!NT_STATUS_IS_OK(status)) {
104 DEBUG(10, ("smbd_check_open_rights: Could not get acl "
105 "on %s: %s\n",
106 smb_fname_str_dbg(smb_fname),
107 nt_errstr(status)));
108 return status;
109 }
110
111 status = smb1_file_se_access_check(conn,
112 sd,
113 get_current_nttok(conn),
114 access_mask,
115 access_granted);
116
117 DEBUG(10,("smbd_check_open_rights: file %s requesting "
118 "0x%x returning 0x%x (%s)\n",
119 smb_fname_str_dbg(smb_fname),
120 (unsigned int)access_mask,
121 (unsigned int)*access_granted,
122 nt_errstr(status) ));
123
124 if (!NT_STATUS_IS_OK(status)) {
125 if (DEBUGLEVEL >= 10) {
126 DEBUG(10,("smbd_check_open_rights: acl for %s is:\n",
127 smb_fname_str_dbg(smb_fname) ));
128 NDR_PRINT_DEBUG(security_descriptor, sd);
129 }
130 }
131
132 TALLOC_FREE(sd);
133
134 return status;
135 }
136
137 /****************************************************************************
138 fd support routines - attempt to do a dos_open.
139 ****************************************************************************/
140
141 static NTSTATUS fd_open(struct connection_struct *conn,
142 files_struct *fsp,
143 int flags,
144 mode_t mode)
145 {
146 struct smb_filename *smb_fname = fsp->fsp_name;
147 NTSTATUS status = NT_STATUS_OK;
148
149 #ifdef O_NOFOLLOW
150 /*
151 * Never follow symlinks on a POSIX client. The
152 * client should be doing this.
153 */
154
155 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
156 flags |= O_NOFOLLOW;
157 }
158 #endif
159
160 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
161 if (fsp->fh->fd == -1) {
162 status = map_nt_error_from_unix(errno);
163 if (errno == EMFILE) {
164 static time_t last_warned = 0L;
165
166 if (time((time_t *) NULL) > last_warned) {
167 DEBUG(0,("Too many open files, unable "
168 "to open more! smbd's max "
169 "open files = %d\n",
170 lp_max_open_files()));
171 last_warned = time((time_t *) NULL);
172 }
173 }
174
175 }
176
177 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
178 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
179 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
180
181 return status;
182 }
183
184 /****************************************************************************
185 Close the file associated with a fsp.
186 ****************************************************************************/
187
188 NTSTATUS fd_close(files_struct *fsp)
189 {
190 int ret;
191
192 if (fsp->dptr) {
193 dptr_CloseDir(fsp);
194 }
195 if (fsp->fh->fd == -1) {
196 return NT_STATUS_OK; /* What we used to call a stat open. */
197 }
198 if (fsp->fh->ref_count > 1) {
199 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
200 }
201
202 ret = SMB_VFS_CLOSE(fsp);
203 fsp->fh->fd = -1;
204 if (ret == -1) {
205 return map_nt_error_from_unix(errno);
206 }
207 return NT_STATUS_OK;
208 }
209
210 /****************************************************************************
211 Change the ownership of a file to that of the parent directory.
212 Do this by fd if possible.
213 ****************************************************************************/
214
215 void change_file_owner_to_parent(connection_struct *conn,
216 const char *inherit_from_dir,
217 files_struct *fsp)
218 {
219 struct smb_filename *smb_fname_parent = NULL;
220 NTSTATUS status;
221 int ret;
222
223 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
224 NULL, NULL, &smb_fname_parent);
225 if (!NT_STATUS_IS_OK(status)) {
226 return;
227 }
228
229 ret = SMB_VFS_STAT(conn, smb_fname_parent);
230 if (ret == -1) {
231 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
232 "directory %s. Error was %s\n",
233 smb_fname_str_dbg(smb_fname_parent),
234 strerror(errno)));
235 TALLOC_FREE(smb_fname_parent);
236 return;
237 }
238
239 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
240 /* Already this uid - no need to change. */
241 DEBUG(10,("change_file_owner_to_parent: file %s "
242 "is already owned by uid %d\n",
243 fsp_str_dbg(fsp),
244 (int)fsp->fsp_name->st.st_ex_uid ));
245 TALLOC_FREE(smb_fname_parent);
246 return;
247 }
248
249 become_root();
250 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
251 unbecome_root();
252 if (ret == -1) {
253 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
254 "file %s to parent directory uid %u. Error "
255 "was %s\n", fsp_str_dbg(fsp),
256 (unsigned int)smb_fname_parent->st.st_ex_uid,
257 strerror(errno) ));
258 } else {
259 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
260 "parent directory uid %u.\n", fsp_str_dbg(fsp),
261 (unsigned int)smb_fname_parent->st.st_ex_uid));
262 /* Ensure the uid entry is updated. */
263 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
264 }
265
266 TALLOC_FREE(smb_fname_parent);
267 }
268
269 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
270 const char *inherit_from_dir,
271 const char *fname,
272 SMB_STRUCT_STAT *psbuf)
273 {
274 struct smb_filename *smb_fname_parent = NULL;
275 struct smb_filename *smb_fname_cwd = NULL;
276 char *saved_dir = NULL;
277 TALLOC_CTX *ctx = talloc_tos();
278 NTSTATUS status = NT_STATUS_OK;
279 int ret;
280
281 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
282 &smb_fname_parent);
283 if (!NT_STATUS_IS_OK(status)) {
284 return status;
285 }
286
287 ret = SMB_VFS_STAT(conn, smb_fname_parent);
288 if (ret == -1) {
289 status = map_nt_error_from_unix(errno);
290 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
291 "directory %s. Error was %s\n",
292 smb_fname_str_dbg(smb_fname_parent),
293 strerror(errno)));
294 goto out;
295 }
296
297 /* We've already done an lstat into psbuf, and we know it's a
298 directory. If we can cd into the directory and the dev/ino
299 are the same then we can safely chown without races as
300 we're locking the directory in place by being in it. This
301 should work on any UNIX (thanks tridge :-). JRA.
302 */
303
304 saved_dir = vfs_GetWd(ctx,conn);
305 if (!saved_dir) {
306 status = map_nt_error_from_unix(errno);
307 DEBUG(0,("change_dir_owner_to_parent: failed to get "
308 "current working directory. Error was %s\n",
309 strerror(errno)));
310 goto out;
311 }
312
313 /* Chdir into the new path. */
314 if (vfs_ChDir(conn, fname) == -1) {
315 status = map_nt_error_from_unix(errno);
316 DEBUG(0,("change_dir_owner_to_parent: failed to change "
317 "current working directory to %s. Error "
318 "was %s\n", fname, strerror(errno) ));
319 goto chdir;
320 }
321
322 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
323 &smb_fname_cwd);
324 if (!NT_STATUS_IS_OK(status)) {
325 return status;
326 }
327
328 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
329 if (ret == -1) {
330 status = map_nt_error_from_unix(errno);
331 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
332 "directory '.' (%s) Error was %s\n",
333 fname, strerror(errno)));
334 goto chdir;
335 }
336
337 /* Ensure we're pointing at the same place. */
338 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
339 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
340 DEBUG(0,("change_dir_owner_to_parent: "
341 "device/inode on directory %s changed. "
342 "Refusing to chown !\n", fname ));
343 status = NT_STATUS_ACCESS_DENIED;
344 goto chdir;
345 }
346
347 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
348 /* Already this uid - no need to change. */
349 DEBUG(10,("change_dir_owner_to_parent: directory %s "
350 "is already owned by uid %d\n",
351 fname,
352 (int)smb_fname_cwd->st.st_ex_uid ));
353 status = NT_STATUS_OK;
354 goto chdir;
355 }
356
357 become_root();
358 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
359 (gid_t)-1);
360 unbecome_root();
361 if (ret == -1) {
362 status = map_nt_error_from_unix(errno);
363 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
364 "directory %s to parent directory uid %u. "
365 "Error was %s\n", fname,
366 (unsigned int)smb_fname_parent->st.st_ex_uid,
367 strerror(errno) ));
368 } else {
369 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
370 "directory %s to parent directory uid %u.\n",
371 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
372 /* Ensure the uid entry is updated. */
373 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
374 }
375
376 chdir:
377 vfs_ChDir(conn,saved_dir);
378 out:
379 TALLOC_FREE(smb_fname_parent);
380 TALLOC_FREE(smb_fname_cwd);
381 return status;
382 }
383
384 /****************************************************************************
385 Open a file.
386 ****************************************************************************/
387
388 static NTSTATUS open_file(files_struct *fsp,
389 connection_struct *conn,
390 struct smb_request *req,
391 const char *parent_dir,
392 int flags,
393 mode_t unx_mode,
394 uint32 access_mask, /* client requested access mask. */
395 uint32 open_access_mask) /* what we're actually using in the open. */
396 {
397 struct smb_filename *smb_fname = fsp->fsp_name;
398 NTSTATUS status = NT_STATUS_OK;
399 int accmode = (flags & O_ACCMODE);
400 int local_flags = flags;
401 bool file_existed = VALID_STAT(fsp->fsp_name->st);
402 bool file_created = false;
403
404 fsp->fh->fd = -1;
405 errno = EPERM;
406
407 /* Check permissions */
408
409 /*
410 * This code was changed after seeing a client open request
411 * containing the open mode of (DENY_WRITE/read-only) with
412 * the 'create if not exist' bit set. The previous code
413 * would fail to open the file read only on a read-only share
414 * as it was checking the flags parameter directly against O_RDONLY,
415 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
416 * JRA.
417 */
418
419 if (!CAN_WRITE(conn)) {
420 /* It's a read-only share - fail if we wanted to write. */
421 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
422 DEBUG(3,("Permission denied opening %s\n",
423 smb_fname_str_dbg(smb_fname)));
424 return NT_STATUS_ACCESS_DENIED;
425 } else if(flags & O_CREAT) {
426 /* We don't want to write - but we must make sure that
427 O_CREAT doesn't create the file if we have write
428 access into the directory.
429 */
430 flags &= ~(O_CREAT|O_EXCL);
431 local_flags &= ~(O_CREAT|O_EXCL);
432 }
433 }
434
435 /*
436 * This little piece of insanity is inspired by the
437 * fact that an NT client can open a file for O_RDONLY,
438 * but set the create disposition to FILE_EXISTS_TRUNCATE.
439 * If the client *can* write to the file, then it expects to
440 * truncate the file, even though it is opening for readonly.
441 * Quicken uses this stupid trick in backup file creation...
442 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
443 * for helping track this one down. It didn't bite us in 2.0.x
444 * as we always opened files read-write in that release. JRA.
445 */
446
447 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
448 DEBUG(10,("open_file: truncate requested on read-only open "
449 "for file %s\n", smb_fname_str_dbg(smb_fname)));
450 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
451 }
452
453 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
454 (!file_existed && (local_flags & O_CREAT)) ||
455 ((local_flags & O_TRUNC) == O_TRUNC) ) {
456 const char *wild;
457
458 /*
459 * We can't actually truncate here as the file may be locked.
460 * open_file_ntcreate will take care of the truncate later. JRA.
461 */
462
463 local_flags &= ~O_TRUNC;
464
465 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
466 /*
467 * We would block on opening a FIFO with no one else on the
468 * other end. Do what we used to do and add O_NONBLOCK to the
469 * open flags. JRA.
470 */
471
472 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
473 local_flags |= O_NONBLOCK;
474 }
475 #endif
476
477 /* Don't create files with Microsoft wildcard characters. */
478 if (fsp->base_fsp) {
479 /*
480 * wildcard characters are allowed in stream names
481 * only test the basefilename
482 */
483 wild = fsp->base_fsp->fsp_name->base_name;
484 } else {
485 wild = smb_fname->base_name;
486 }
487 if ((local_flags & O_CREAT) && !file_existed &&
488 ms_has_wild(wild)) {
489 return NT_STATUS_OBJECT_NAME_INVALID;
490 }
491
492 /* Actually do the open */
493 status = fd_open(conn, fsp, local_flags, unx_mode);
494 if (!NT_STATUS_IS_OK(status)) {
495 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
496 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
497 nt_errstr(status),local_flags,flags));
498 return status;
499 }
500
501 if ((local_flags & O_CREAT) && !file_existed) {
502 file_created = true;
503 }
504
505 } else {
506 fsp->fh->fd = -1; /* What we used to call a stat open. */
507 if (file_existed) {
508 uint32_t access_granted = 0;
509
510 status = smbd_check_open_rights(conn,
511 smb_fname,
512 access_mask,
513 &access_granted);
514 if (!NT_STATUS_IS_OK(status)) {
515 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
516 /*
517 * On NT_STATUS_ACCESS_DENIED, access_granted
518 * contains the denied bits.
519 */
520
521 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
522 (access_granted & FILE_WRITE_ATTRIBUTES) &&
523 (lp_map_readonly(SNUM(conn)) ||
524 lp_map_archive(SNUM(conn)) ||
525 lp_map_hidden(SNUM(conn)) ||
526 lp_map_system(SNUM(conn)))) {
527 access_granted &= ~FILE_WRITE_ATTRIBUTES;
528
529 DEBUG(10,("open_file: "
530 "overrode "
531 "FILE_WRITE_"
532 "ATTRIBUTES "
533 "on file %s\n",
534 smb_fname_str_dbg(
535 smb_fname)));
536 }
537
538 if ((access_mask & DELETE_ACCESS) &&
539 (access_granted & DELETE_ACCESS) &&
540 can_delete_file_in_directory(conn,
541 smb_fname)) {
542 /* Were we trying to do a stat open
543 * for delete and didn't get DELETE
544 * access (only) ? Check if the
545 * directory allows DELETE_CHILD.
546 * See here:
547 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
548 * for details. */
549
550 access_granted &= ~DELETE_ACCESS;
551
552 DEBUG(10,("open_file: "
553 "overrode "
554 "DELETE_ACCESS on "
555 "file %s\n",
556 smb_fname_str_dbg(
557 smb_fname)));
558 }
559
560 if (access_granted != 0) {
561 DEBUG(10,("open_file: Access "
562 "denied on file "
563 "%s\n",
564 smb_fname_str_dbg(
565 smb_fname)));
566 return status;
567 }
568 } else if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
569 fsp->posix_open &&
570 S_ISLNK(smb_fname->st.st_ex_mode)) {
571 /* This is a POSIX stat open for delete
572 * or rename on a symlink that points
573 * nowhere. Allow. */
574 DEBUG(10,("open_file: allowing POSIX "
575 "open on bad symlink %s\n",
576 smb_fname_str_dbg(
577 smb_fname)));
578 } else {
579 DEBUG(10,("open_file: "
580 "smbd_check_open_rights on file "
581 "%s returned %s\n",
582 smb_fname_str_dbg(smb_fname),
583 nt_errstr(status) ));
584 return status;
585 }
586 }
587 }
588 }
589
590 if (!file_existed) {
591 int ret;
592
593 if (fsp->fh->fd == -1) {
594 ret = SMB_VFS_STAT(conn, smb_fname);
595 } else {
596 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
597 /* If we have an fd, this stat should succeed. */
598 if (ret == -1) {
599 DEBUG(0,("Error doing fstat on open file %s "
600 "(%s)\n",
601 smb_fname_str_dbg(smb_fname),
602 strerror(errno) ));
603 }
604 }
605
606 /* For a non-io open, this stat failing means file not found. JRA */
607 if (ret == -1) {
608 status = map_nt_error_from_unix(errno);
609 fd_close(fsp);
610 return status;
611 }
612
613 if (file_created) {
614 bool need_re_stat = false;
615 /* Do all inheritance work after we've
616 done a successful stat call and filled
617 in the stat struct in fsp->fsp_name. */
618
619 /* Inherit the ACL if required */
620 if (lp_inherit_perms(SNUM(conn))) {
621 inherit_access_posix_acl(conn, parent_dir,
622 smb_fname->base_name,
623 unx_mode);
624 need_re_stat = true;
625 }
626
627 /* Change the owner if required. */
628 if (lp_inherit_owner(SNUM(conn))) {
629 change_file_owner_to_parent(conn, parent_dir,
630 fsp);
631 need_re_stat = true;
632 }
633
634 if (need_re_stat) {
635 if (fsp->fh->fd == -1) {
636 ret = SMB_VFS_STAT(conn, smb_fname);
637 } else {
638 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
639 /* If we have an fd, this stat should succeed. */
640 if (ret == -1) {
641 DEBUG(0,("Error doing fstat on open file %s "
642 "(%s)\n",
643 smb_fname_str_dbg(smb_fname),
644 strerror(errno) ));
645 }
646 }
647 }
648
649 notify_fname(conn, NOTIFY_ACTION_ADDED,
650 FILE_NOTIFY_CHANGE_FILE_NAME,
651 smb_fname->base_name);
652 }
653 }
654
655 /*
656 * POSIX allows read-only opens of directories. We don't
657 * want to do this (we use a different code path for this)
658 * so catch a directory open and return an EISDIR. JRA.
659 */
660
661 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
662 fd_close(fsp);
663 errno = EISDIR;
664 return NT_STATUS_FILE_IS_A_DIRECTORY;
665 }
666
667 fsp->mode = smb_fname->st.st_ex_mode;
668 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
669 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
670 fsp->file_pid = req ? req->smbpid : 0;
671 fsp->can_lock = True;
672 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
673 if (!CAN_WRITE(conn)) {
674 fsp->can_write = False;
675 } else {
676 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
677 True : False;
678 }
679 fsp->print_file = NULL;
680 fsp->modified = False;
681 fsp->sent_oplock_break = NO_BREAK_SENT;
682 fsp->is_directory = False;
683 if (conn->aio_write_behind_list &&
684 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
685 conn->case_sensitive)) {
686 fsp->aio_write_behind = True;
687 }
688
689 fsp->wcp = NULL; /* Write cache pointer. */
690
691 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
692 conn->session_info->unix_name,
693 smb_fname_str_dbg(smb_fname),
694 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
695 conn->num_files_open));
696
697 errno = 0;
698 return NT_STATUS_OK;
699 }
700
701 /*******************************************************************
702 Return True if the filename is one of the special executable types.
703 ********************************************************************/
704
705 bool is_executable(const char *fname)
706 {
707 if ((fname = strrchr_m(fname,'.'))) {
708 if (strequal(fname,".com") ||
709 strequal(fname,".dll") ||
710 strequal(fname,".exe") ||
711 strequal(fname,".sym")) {
712 return True;
713 }
714 }
715 return False;
716 }
717
718 /****************************************************************************
719 Check if we can open a file with a share mode.
720 Returns True if conflict, False if not.
721 ****************************************************************************/
722
723 static bool share_conflict(struct share_mode_entry *entry,
724 uint32 access_mask,
725 uint32 share_access)
726 {
727 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
728 "entry->share_access = 0x%x, "
729 "entry->private_options = 0x%x\n",
730 (unsigned int)entry->access_mask,
731 (unsigned int)entry->share_access,
732 (unsigned int)entry->private_options));
733
734 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
735 (unsigned int)access_mask, (unsigned int)share_access));
736
737 if ((entry->access_mask & (FILE_WRITE_DATA|
738 FILE_APPEND_DATA|
739 FILE_READ_DATA|
740 FILE_EXECUTE|
741 DELETE_ACCESS)) == 0) {
742 DEBUG(10,("share_conflict: No conflict due to "
743 "entry->access_mask = 0x%x\n",
744 (unsigned int)entry->access_mask ));
745 return False;
746 }
747
748 if ((access_mask & (FILE_WRITE_DATA|
749 FILE_APPEND_DATA|
750 FILE_READ_DATA|
751 FILE_EXECUTE|
752 DELETE_ACCESS)) == 0) {
753 DEBUG(10,("share_conflict: No conflict due to "
754 "access_mask = 0x%x\n",
755 (unsigned int)access_mask ));
756 return False;
757 }
758
759 #if 1 /* JRA TEST - Superdebug. */
760 #define CHECK_MASK(num, am, right, sa, share) \
761 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
762 (unsigned int)(num), (unsigned int)(am), \
763 (unsigned int)(right), (unsigned int)(am)&(right) )); \
764 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
765 (unsigned int)(num), (unsigned int)(sa), \
766 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
767 if (((am) & (right)) && !((sa) & (share))) { \
768 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
769 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
770 (unsigned int)(share) )); \
771 return True; \
772 }
773 #else
774 #define CHECK_MASK(num, am, right, sa, share) \
775 if (((am) & (right)) && !((sa) & (share))) { \
776 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
777 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
778 (unsigned int)(share) )); \
779 return True; \
780 }
781 #endif
782
783 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
784 share_access, FILE_SHARE_WRITE);
785 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
786 entry->share_access, FILE_SHARE_WRITE);
787
788 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
789 share_access, FILE_SHARE_READ);
790 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
791 entry->share_access, FILE_SHARE_READ);
792
793 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
794 share_access, FILE_SHARE_DELETE);
795 CHECK_MASK(6, access_mask, DELETE_ACCESS,
796 entry->share_access, FILE_SHARE_DELETE);
797
798 DEBUG(10,("share_conflict: No conflict.\n"));
799 return False;
800 }
801
802 #if defined(DEVELOPER)
803 static void validate_my_share_entries(struct smbd_server_connection *sconn,
804 int num,
805 struct share_mode_entry *share_entry)
806 {
807 files_struct *fsp;
808
809 if (!procid_is_me(&share_entry->pid)) {
810 return;
811 }
812
813 if (is_deferred_open_entry(share_entry) &&
814 !open_was_deferred(share_entry->op_mid)) {
815 char *str = talloc_asprintf(talloc_tos(),
816 "Got a deferred entry without a request: "
817 "PANIC: %s\n",
818 share_mode_str(talloc_tos(), num, share_entry));
819 smb_panic(str);
820 }
821
822 if (!is_valid_share_mode_entry(share_entry)) {
823 return;
824 }
825
826 fsp = file_find_dif(sconn, share_entry->id,
827 share_entry->share_file_id);
828 if (!fsp) {
829 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
830 share_mode_str(talloc_tos(), num, share_entry) ));
831 smb_panic("validate_my_share_entries: Cannot match a "
832 "share entry with an open file\n");
833 }
834
835 if (is_deferred_open_entry(share_entry) ||
836 is_unused_share_mode_entry(share_entry)) {
837 goto panic;
838 }
839
840 if ((share_entry->op_type == NO_OPLOCK) &&
841 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
842 /* Someone has already written to it, but I haven't yet
843 * noticed */
844 return;
845 }
846
847 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
848 goto panic;
849 }
850
851 return;
852
853 panic:
854 {
855 char *str;
856 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
857 share_mode_str(talloc_tos(), num, share_entry) ));
858 str = talloc_asprintf(talloc_tos(),
859 "validate_my_share_entries: "
860 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
861 fsp->fsp_name->base_name,
862 (unsigned int)fsp->oplock_type,
863 (unsigned int)share_entry->op_type );
864 smb_panic(str);
865 }
866 }
867 #endif
868
869 bool is_stat_open(uint32 access_mask)
870 {
871 return (access_mask &&
872 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
873 FILE_WRITE_ATTRIBUTES))==0) &&
874 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
875 FILE_WRITE_ATTRIBUTES)) != 0));
876 }
877
878 /****************************************************************************
879 Deal with share modes
880 Invarient: Share mode must be locked on entry and exit.
881 Returns -1 on error, or number of share modes on success (may be zero).
882 ****************************************************************************/
883
884 static NTSTATUS open_mode_check(connection_struct *conn,
885 struct share_mode_lock *lck,
886 uint32_t name_hash,
887 uint32 access_mask,
888 uint32 share_access,
889 uint32 create_options,
890 bool *file_existed)
891 {
892 int i;
893
894 if(lck->num_share_modes == 0) {
895 return NT_STATUS_OK;
896 }
897
898 *file_existed = True;
899
900 /* A delete on close prohibits everything */
901
902 if (is_delete_on_close_set(lck, name_hash)) {
903 return NT_STATUS_DELETE_PENDING;
904 }
905
906 if (is_stat_open(access_mask)) {
907 /* Stat open that doesn't trigger oplock breaks or share mode
908 * checks... ! JRA. */
909 return NT_STATUS_OK;
910 }
911
912 /*
913 * Check if the share modes will give us access.
914 */
915
916 #if defined(DEVELOPER)
917 for(i = 0; i < lck->num_share_modes; i++) {
918 validate_my_share_entries(conn->sconn, i,
919 &lck->share_modes[i]);
920 }
921 #endif
922
923 if (!lp_share_modes(SNUM(conn))) {
924 return NT_STATUS_OK;
925 }
926
927 /* Now we check the share modes, after any oplock breaks. */
928 for(i = 0; i < lck->num_share_modes; i++) {
929
930 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
931 continue;
932 }
933
934 /* someone else has a share lock on it, check to see if we can
935 * too */
936 if (share_conflict(&lck->share_modes[i],
937 access_mask, share_access)) {
938 return NT_STATUS_SHARING_VIOLATION;
939 }
940 }
941
942 return NT_STATUS_OK;
943 }
944
945 static bool is_delete_request(files_struct *fsp) {
946 return ((fsp->access_mask == DELETE_ACCESS) &&
947 (fsp->oplock_type == NO_OPLOCK));
948 }
949
950 /*
951 * Send a break message to the oplock holder and delay the open for
952 * our client.
953 */
954
955 static NTSTATUS send_break_message(files_struct *fsp,
956 struct share_mode_entry *exclusive,
957 uint64_t mid,
958 int oplock_request)
959 {
960 NTSTATUS status;
961 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
962
963 DEBUG(10, ("Sending break request to PID %s\n",
964 procid_str_static(&exclusive->pid)));
965 exclusive->op_mid = mid;
966
967 /* Create the message. */
968 share_mode_entry_to_message(msg, exclusive);
969
970 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
971 don't want this set in the share mode struct pointed to by lck. */
972
973 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
974 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
975 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
976 }
977
978 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
979 MSG_SMB_BREAK_REQUEST,
980 (uint8 *)msg,
981 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
982 if (!NT_STATUS_IS_OK(status)) {
983 DEBUG(3, ("Could not send oplock break message: %s\n",
984 nt_errstr(status)));
985 }
986
987 return status;
988 }
989
990 /*
991 * Return share_mode_entry pointers for :
992 * 1). Batch oplock entry.
993 * 2). Batch or exclusive oplock entry (may be identical to #1).
994 * bool have_level2_oplock
995 * bool have_no_oplock.
996 * Do internal consistency checks on the share mode for a file.
997 */
998
999 static void find_oplock_types(files_struct *fsp,
1000 int oplock_request,
1001 struct share_mode_lock *lck,
1002 struct share_mode_entry **pp_batch,
1003 struct share_mode_entry **pp_ex_or_batch,
1004 bool *got_level2,
1005 bool *got_no_oplock)
1006 {
1007 int i;
1008
1009 *pp_batch = NULL;
1010 *pp_ex_or_batch = NULL;
1011 *got_level2 = false;
1012 *got_no_oplock = false;
1013
1014 /* Ignore stat or internal opens, as is done in
1015 delay_for_batch_oplocks() and
1016 delay_for_exclusive_oplocks().
1017 */
1018 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1019 return;
1020 }
1021
1022 for (i=0; i<lck->num_share_modes; i++) {
1023 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1024 continue;
1025 }
1026
1027 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1028 is_stat_open(lck->share_modes[i].access_mask)) {
1029 /* We ignore stat opens in the table - they
1030 always have NO_OPLOCK and never get or
1031 cause breaks. JRA. */
1032 continue;
1033 }
1034
1035 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1036 /* batch - can only be one. */
1037 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1038 smb_panic("Bad batch oplock entry.");
1039 }
1040 *pp_batch = &lck->share_modes[i];
1041 }
1042
1043 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1044 /* Exclusive or batch - can only be one. */
1045 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1046 smb_panic("Bad exclusive or batch oplock entry.");
1047 }
1048 *pp_ex_or_batch = &lck->share_modes[i];
1049 }
1050
1051 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1052 if (*pp_batch || *pp_ex_or_batch) {
1053 smb_panic("Bad levelII oplock entry.");
1054 }
1055 *got_level2 = true;
1056 }
1057
1058 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1059 if (*pp_batch || *pp_ex_or_batch) {
1060 smb_panic("Bad no oplock entry.");
1061 }
1062 *got_no_oplock = true;
1063 }
1064 }
1065 }
1066
1067 static bool delay_for_batch_oplocks(files_struct *fsp,
1068 uint64_t mid,
1069 int oplock_request,
1070 struct share_mode_entry *batch_entry)
1071 {
1072 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1073 return false;
1074 }
1075
1076 if (batch_entry != NULL) {
1077 /* Found a batch oplock */
1078 send_break_message(fsp, batch_entry, mid, oplock_request);
1079 return true;
1080 }
1081 return false;
1082 }
1083
1084 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1085 uint64_t mid,
1086 int oplock_request,
1087 struct share_mode_entry *ex_entry)
1088 {
1089 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1090 return false;
1091 }
1092
1093 if (ex_entry != NULL) {
1094 /* Found an exclusive or batch oplock */
1095 bool delay_it = is_delete_request(fsp) ?
1096 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1097 if (delay_it) {
1098 send_break_message(fsp, ex_entry, mid, oplock_request);
1099 return true;
1100 }
1101 }
1102 return false;
1103 }
1104
1105 static void grant_fsp_oplock_type(files_struct *fsp,
1106 const struct byte_range_lock *br_lck,
1107 int oplock_request,
1108 bool got_level2_oplock,
1109 bool got_a_none_oplock)
1110 {
1111 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1112 lp_level2_oplocks(SNUM(fsp->conn));
1113
1114 /* Start by granting what the client asked for,
1115 but ensure no SAMBA_PRIVATE bits can be set. */
1116 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1117
1118 if (oplock_request & INTERNAL_OPEN_ONLY) {
1119 /* No oplocks on internal open. */
1120 fsp->oplock_type = NO_OPLOCK;
1121 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1122 fsp->oplock_type, fsp_str_dbg(fsp)));
1123 return;
1124 } else if (br_lck && br_lck->num_locks > 0) {
1125 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1126 fsp_str_dbg(fsp)));
1127 fsp->oplock_type = NO_OPLOCK;
1128 }
1129
1130 if (is_stat_open(fsp->access_mask)) {
1131 /* Leave the value already set. */
1132 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1133 fsp->oplock_type, fsp_str_dbg(fsp)));
1134 return;
1135 }
1136
1137 /*
1138 * Match what was requested (fsp->oplock_type) with
1139 * what was found in the existing share modes.
1140 */
1141
1142 if (got_a_none_oplock) {
1143 fsp->oplock_type = NO_OPLOCK;
1144 } else if (got_level2_oplock) {
1145 if (fsp->oplock_type == NO_OPLOCK ||
1146 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1147 /* Store a level2 oplock, but don't tell the client */
1148 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1149 } else {
1150 fsp->oplock_type = LEVEL_II_OPLOCK;
1151 }
1152 } else {
1153 /* All share_mode_entries are placeholders or deferred.
1154 * Silently upgrade to fake levelII if the client didn't
1155 * ask for an oplock. */
1156 if (fsp->oplock_type == NO_OPLOCK) {
1157 /* Store a level2 oplock, but don't tell the client */
1158 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1159 }
1160 }
1161
1162 /*
1163 * Don't grant level2 to clients that don't want them
1164 * or if we've turned them off.
1165 */
1166 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1167 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1168 }
1169
1170 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1171 fsp->oplock_type, fsp_str_dbg(fsp)));
1172 }
1173
1174 bool request_timed_out(struct timeval request_time,
1175 struct timeval timeout)
1176 {
1177 struct timeval now, end_time;
1178 GetTimeOfDay(&now);
1179 end_time = timeval_sum(&request_time, &timeout);
1180 return (timeval_compare(&end_time, &now) < 0);
1181 }
1182
1183 /****************************************************************************
1184 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1185 ****************************************************************************/
1186
1187 static void defer_open(struct share_mode_lock *lck,
1188 struct timeval request_time,
1189 struct timeval timeout,
1190 struct smb_request *req,
1191 struct deferred_open_record *state)
1192 {
1193 int i;
1194
1195 /* Paranoia check */
1196
1197 for (i=0; i<lck->num_share_modes; i++) {
1198 struct share_mode_entry *e = &lck->share_modes[i];
1199
1200 if (!is_deferred_open_entry(e)) {
1201 continue;
1202 }
1203
1204 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1205 DEBUG(0, ("Trying to defer an already deferred "
1206 "request: mid=%llu, exiting\n",
1207 (unsigned long long)req->mid));
1208 exit_server("attempt to defer a deferred request");
1209 }
1210 }
1211
1212 /* End paranoia check */
1213
1214 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1215 "open entry for mid %llu\n",
1216 (unsigned int)request_time.tv_sec,
1217 (unsigned int)request_time.tv_usec,
1218 (unsigned long long)req->mid));
1219
1220 if (!push_deferred_open_message_smb(req, request_time, timeout,
1221 state->id, (char *)state, sizeof(*state))) {
1222 exit_server("push_deferred_open_message_smb failed");
1223 }
1224 add_deferred_open(lck, req->mid, request_time,
1225 sconn_server_id(req->sconn), state->id);
1226 }
1227
1228
1229 /****************************************************************************
1230 On overwrite open ensure that the attributes match.
1231 ****************************************************************************/
1232
1233 bool open_match_attributes(connection_struct *conn,
1234 uint32 old_dos_attr,
1235 uint32 new_dos_attr,
1236 mode_t existing_unx_mode,
1237 mode_t new_unx_mode,
1238 mode_t *returned_unx_mode)
1239 {
1240 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1241
1242 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1243 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1244
1245 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1246 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1247 *returned_unx_mode = new_unx_mode;
1248 } else {
1249 *returned_unx_mode = (mode_t)0;
1250 }
1251
1252 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1253 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1254 "returned_unx_mode = 0%o\n",
1255 (unsigned int)old_dos_attr,
1256 (unsigned int)existing_unx_mode,
1257 (unsigned int)new_dos_attr,
1258 (unsigned int)*returned_unx_mode ));
1259
1260 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1261 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1262 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1263 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1264 return False;
1265 }
1266 }
1267 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1268 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1269 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1270 return False;
1271 }
1272 }
1273 return True;
1274 }
1275
1276 /****************************************************************************
1277 Special FCB or DOS processing in the case of a sharing violation.
1278 Try and find a duplicated file handle.
1279 ****************************************************************************/
1280
1281 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1282 connection_struct *conn,
1283 files_struct *fsp_to_dup_into,
1284 const struct smb_filename *smb_fname,
1285 struct file_id id,
1286 uint16 file_pid,
1287 uint16 vuid,
1288 uint32 access_mask,
1289 uint32 share_access,
1290 uint32 create_options)
1291 {
1292 files_struct *fsp;
1293
1294 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1295 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1296
1297 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1298 fsp = file_find_di_next(fsp)) {
1299
1300 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1301 "vuid = %u, file_pid = %u, private_options = 0x%x "
1302 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1303 fsp->fh->fd, (unsigned int)fsp->vuid,
1304 (unsigned int)fsp->file_pid,
1305 (unsigned int)fsp->fh->private_options,
1306 (unsigned int)fsp->access_mask ));
1307
1308 if (fsp->fh->fd != -1 &&
1309 fsp->vuid == vuid &&
1310 fsp->file_pid == file_pid &&
1311 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1312 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1313 (fsp->access_mask & FILE_WRITE_DATA) &&
1314 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1315 strequal(fsp->fsp_name->stream_name,
1316 smb_fname->stream_name)) {
1317 DEBUG(10,("fcb_or_dos_open: file match\n"));
1318 break;
1319 }
1320 }
1321
1322 if (!fsp) {
1323 return NT_STATUS_NOT_FOUND;
1324 }
1325
1326 /* quite an insane set of semantics ... */
1327 if (is_executable(smb_fname->base_name) &&
1328 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1329 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1330 return NT_STATUS_INVALID_PARAMETER;
1331 }
1332
1333 /* We need to duplicate this fsp. */
1334 return dup_file_fsp(req, fsp, access_mask, share_access,
1335 create_options, fsp_to_dup_into);
1336 }
1337
1338 /****************************************************************************
1339 Open a file with a share mode - old openX method - map into NTCreate.
1340 ****************************************************************************/
1341
1342 bool map_open_params_to_ntcreate(const struct smb_filename *smb_fname,
1343 int deny_mode, int open_func,
1344 uint32 *paccess_mask,
1345 uint32 *pshare_mode,
1346 uint32 *pcreate_disposition,
1347 uint32 *pcreate_options,
1348 uint32_t *pprivate_flags)
1349 {
1350 uint32 access_mask;
1351 uint32 share_mode;
1352 uint32 create_disposition;
1353 uint32 create_options = FILE_NON_DIRECTORY_FILE;
1354 uint32_t private_flags = 0;
1355
1356 DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
1357 "open_func = 0x%x\n",
1358 smb_fname_str_dbg(smb_fname), (unsigned int)deny_mode,
1359 (unsigned int)open_func ));
1360
1361 /* Create the NT compatible access_mask. */
1362 switch (GET_OPENX_MODE(deny_mode)) {
1363 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
1364 case DOS_OPEN_RDONLY:
1365 access_mask = FILE_GENERIC_READ;
1366 break;
1367 case DOS_OPEN_WRONLY:
1368 access_mask = FILE_GENERIC_WRITE;
1369 break;
1370 case DOS_OPEN_RDWR:
1371 case DOS_OPEN_FCB:
1372 access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
1373 break;
1374 default:
1375 DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
1376 (unsigned int)GET_OPENX_MODE(deny_mode)));
1377 return False;
1378 }
1379
1380 /* Create the NT compatible create_disposition. */
1381 switch (open_func) {
1382 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
1383 create_disposition = FILE_CREATE;
1384 break;
1385
1386 case OPENX_FILE_EXISTS_OPEN:
1387 create_disposition = FILE_OPEN;
1388 break;
1389
1390 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
1391 create_disposition = FILE_OPEN_IF;
1392 break;
1393
1394 case OPENX_FILE_EXISTS_TRUNCATE:
1395 create_disposition = FILE_OVERWRITE;
1396 break;
1397
1398 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
1399 create_disposition = FILE_OVERWRITE_IF;
1400 break;
1401
1402 default:
1403 /* From samba4 - to be confirmed. */
1404 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
1405 create_disposition = FILE_CREATE;
1406 break;
1407 }
1408 DEBUG(10,("map_open_params_to_ntcreate: bad "
1409 "open_func 0x%x\n", (unsigned int)open_func));
1410 return False;
1411 }
1412
1413 /* Create the NT compatible share modes. */
1414 switch (GET_DENY_MODE(deny_mode)) {
1415 case DENY_ALL:
1416 share_mode = FILE_SHARE_NONE;
1417 break;
1418
1419 case DENY_WRITE:
1420 share_mode = FILE_SHARE_READ;
1421 break;
1422
1423 case DENY_READ:
1424 share_mode = FILE_SHARE_WRITE;
1425 break;
1426
1427 case DENY_NONE:
1428 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1429 break;
1430
1431 case DENY_DOS:
1432 private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1433 if (is_executable(smb_fname->base_name)) {
1434 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1435 } else {
1436 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1437 share_mode = FILE_SHARE_READ;
1438 } else {
1439 share_mode = FILE_SHARE_NONE;
1440 }
1441 }
1442 break;
1443
1444 case DENY_FCB:
1445 private_flags |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1446 share_mode = FILE_SHARE_NONE;
1447 break;
1448
1449 default:
1450 DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1451 (unsigned int)GET_DENY_MODE(deny_mode) ));
1452 return False;
1453 }
1454
1455 DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1456 "share_mode = 0x%x, create_disposition = 0x%x, "
1457 "create_options = 0x%x private_flags = 0x%x\n",
1458 smb_fname_str_dbg(smb_fname),
1459 (unsigned int)access_mask,
1460 (unsigned int)share_mode,
1461 (unsigned int)create_disposition,
1462 (unsigned int)create_options,
1463 (unsigned int)private_flags));
1464
1465 if (paccess_mask) {
1466 *paccess_mask = access_mask;
1467 }
1468 if (pshare_mode) {
1469 *pshare_mode = share_mode;
1470 }
1471 if (pcreate_disposition) {
1472 *pcreate_disposition = create_disposition;
1473 }
1474 if (pcreate_options) {
1475 *pcreate_options = create_options;
1476 }
1477 if (pprivate_flags) {
1478 *pprivate_flags = private_flags;
1479 }
1480
1481 return True;
1482
1483 }
1484
1485 static void schedule_defer_open(struct share_mode_lock *lck,
1486 struct timeval request_time,
1487 struct smb_request *req)
1488 {
1489 struct deferred_open_record state;
1490
1491 /* This is a relative time, added to the absolute
1492 request_time value to get the absolute timeout time.
1493 Note that if this is the second or greater time we enter
1494 this codepath for this particular request mid then
1495 request_time is left as the absolute time of the *first*
1496 time this request mid was processed. This is what allows
1497 the request to eventually time out. */
1498
1499 struct timeval timeout;
1500
1501 /* Normally the smbd we asked should respond within
1502 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1503 * the client did, give twice the timeout as a safety
1504 * measure here in case the other smbd is stuck
1505 * somewhere else. */
1506
1507 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1508
1509 /* Nothing actually uses state.delayed_for_oplocks
1510 but it's handy to differentiate in debug messages
1511 between a 30 second delay due to oplock break, and
1512 a 1 second delay for share mode conflicts. */
1513
1514 state.delayed_for_oplocks = True;
1515 state.id = lck->id;
1516
1517 if (!request_timed_out(request_time, timeout)) {
1518 defer_open(lck, request_time, timeout, req, &state);
1519 }
1520 }
1521
1522 /****************************************************************************
1523 Work out what access_mask to use from what the client sent us.
1524 ****************************************************************************/
1525
1526 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1527 const struct smb_filename *smb_fname,
1528 bool file_existed,
1529 uint32_t access_mask,
1530 uint32_t *access_mask_out)
1531 {
1532 NTSTATUS status;
1533
1534 /*
1535 * Convert GENERIC bits to specific bits.
1536 */
1537
1538 se_map_generic(&access_mask, &file_generic_mapping);
1539
1540 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1541 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1542 if (file_existed) {
1543
1544 struct security_descriptor *sd;
1545 uint32_t access_granted = 0;
1546
1547 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1548 (SECINFO_OWNER |
1549 SECINFO_GROUP |
1550 SECINFO_DACL),&sd);
1551
1552 if (!NT_STATUS_IS_OK(status)) {
1553 DEBUG(10,("smbd_calculate_access_mask: "
1554 "Could not get acl on file %s: %s\n",
1555 smb_fname_str_dbg(smb_fname),
1556 nt_errstr(status)));
1557 return NT_STATUS_ACCESS_DENIED;
1558 }
1559
1560 status = smb1_file_se_access_check(conn,
1561 sd,
1562 get_current_nttok(conn),
1563 access_mask,
1564 &access_granted);
1565
1566 TALLOC_FREE(sd);
1567
1568 if (!NT_STATUS_IS_OK(status)) {
1569 DEBUG(10, ("smbd_calculate_access_mask: "
1570 "Access denied on file %s: "
1571 "when calculating maximum access\n",
1572 smb_fname_str_dbg(smb_fname)));
1573 return NT_STATUS_ACCESS_DENIED;
1574 }
1575
1576 access_mask = access_granted;
1577 } else {
1578 access_mask = FILE_GENERIC_ALL;
1579 }
1580 }
1581
1582 *access_mask_out = access_mask;
1583 return NT_STATUS_OK;
1584 }
1585
1586 /****************************************************************************
1587 Remove the deferred open entry under lock.
1588 ****************************************************************************/
1589
1590 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1591 struct server_id pid)
1592 {
1593 struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1594 NULL, NULL, NULL);
1595 if (lck == NULL) {
1596 DEBUG(0, ("could not get share mode lock\n"));
1597 } else {
1598 del_deferred_open_entry(lck, mid, pid);
1599 TALLOC_FREE(lck);
1600 }
1601 }
1602
1603 /****************************************************************
1604 Ensure we get the brlock lock followed by the share mode lock
1605 in the correct order to prevent deadlocks if other smbd's are
1606 using the brlock database on this file simultaneously with this open
1607 (that code also gets the locks in brlock -> share mode lock order).
1608 ****************************************************************/
1609
1610 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1611 files_struct *fsp,
1612 const struct file_id id,
1613 const char *connectpath,
1614 const struct smb_filename *smb_fname,
1615 const struct timespec *p_old_write_time,
1616 struct share_mode_lock **p_lck,
1617 struct byte_range_lock **p_br_lck)
1618 {
1619 /* Ordering - we must get the br_lck for this
1620 file before the share mode. */
1621 if (lp_locking(fsp->conn->params)) {
1622 *p_br_lck = brl_get_locks_readonly(fsp);
1623 if (*p_br_lck == NULL) {
1624 DEBUG(0, ("Could not get br_lock\n"));
1625 return false;
1626 }
1627 /* Note - we don't need to free the returned
1628 br_lck explicitly as it was allocated on talloc_tos()
1629 and so will be autofreed (and release the lock)
1630 once the frame context disappears.
1631
1632 If it was set to fsp->brlock_rec then it was
1633 talloc_move'd to hang off the fsp pointer and
1634 in this case is guarenteed to not be holding the
1635 lock on the brlock database. */
1636 }
1637
1638 *p_lck = get_share_mode_lock(mem_ctx,
1639 id,
1640 connectpath,
1641 smb_fname,
1642 p_old_write_time);
1643
1644 if (*p_lck == NULL) {
1645 DEBUG(0, ("Could not get share mode lock\n"));
1646 TALLOC_FREE(*p_br_lck);
1647 return false;
1648 }
1649 return true;
1650 }
1651
1652 /****************************************************************************
1653 Open a file with a share mode. Passed in an already created files_struct *.
1654 ****************************************************************************/
1655
1656 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1657 struct smb_request *req,
1658 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1659 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1660 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1661 uint32 create_options, /* options such as delete on close. */
1662 uint32 new_dos_attributes, /* attributes used for new file. */
1663 int oplock_request, /* internal Samba oplock codes. */
1664 /* Information (FILE_EXISTS etc.) */
1665 uint32_t private_flags, /* Samba specific flags. */
1666 int *pinfo,
1667 files_struct *fsp)
1668 {
1669 struct smb_filename *smb_fname = fsp->fsp_name;
1670 int flags=0;
1671 int flags2=0;
1672 bool file_existed = VALID_STAT(smb_fname->st);
1673 bool def_acl = False;
1674 bool posix_open = False;
1675 bool new_file_created = False;
1676 bool clear_ads = false;
1677 struct file_id id;
1678 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1679 mode_t new_unx_mode = (mode_t)0;
1680 mode_t unx_mode = (mode_t)0;
1681 int info;
1682 uint32 existing_dos_attributes = 0;
1683 struct timeval request_time = timeval_zero();
1684 struct share_mode_lock *lck = NULL;
1685 uint32 open_access_mask = access_mask;
1686 NTSTATUS status;
1687 char *parent_dir;
1688
1689 ZERO_STRUCT(id);
1690
1691 /* Windows allows a new file to be created and
1692 silently removes a FILE_ATTRIBUTE_DIRECTORY
1693 sent by the client. Do the same. */
1694
1695 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1696
1697 if (conn->printer) {
1698 /*
1699 * Printers are handled completely differently.
1700 * Most of the passed parameters are ignored.
1701 */
1702
1703 if (pinfo) {
1704 *pinfo = FILE_WAS_CREATED;
1705 }
1706
1707 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1708 smb_fname_str_dbg(smb_fname)));
1709
1710 if (!req) {
1711 DEBUG(0,("open_file_ntcreate: printer open without "
1712 "an SMB request!\n"));
1713 return NT_STATUS_INTERNAL_ERROR;
1714 }
1715
1716 return print_spool_open(fsp, smb_fname->base_name,
1717 req->vuid);
1718 }
1719
1720 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1721 NULL)) {
1722 return NT_STATUS_NO_MEMORY;
1723 }
1724
1725 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1726 posix_open = True;
1727 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1728 new_dos_attributes = 0;
1729 } else {
1730 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1731 * created new. */
1732 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1733 smb_fname, parent_dir);
1734 }
1735
1736 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1737 "access_mask=0x%x share_access=0x%x "
1738 "create_disposition = 0x%x create_options=0x%x "
1739 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1740 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1741 access_mask, share_access, create_disposition,
1742 create_options, (unsigned int)unx_mode, oplock_request,
1743 (unsigned int)private_flags));
1744
1745 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1746 DEBUG(0, ("No smb request but not an internal only open!\n"));
1747 return NT_STATUS_INTERNAL_ERROR;
1748 }
1749
1750 /*
1751 * Only non-internal opens can be deferred at all
1752 */
1753
1754 if (req) {
1755 void *ptr;
1756 if (get_deferred_open_message_state(req,
1757 &request_time,
1758 &ptr)) {
1759
1760 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1761 /* Remember the absolute time of the original
1762 request with this mid. We'll use it later to
1763 see if this has timed out. */
1764
1765 /* Remove the deferred open entry under lock. */
1766 remove_deferred_open_entry(
1767 state->id, req->mid,
1768 sconn_server_id(req->sconn));
1769
1770 /* Ensure we don't reprocess this message. */
1771 remove_deferred_open_message_smb(req->mid);
1772 }
1773 }
1774
1775 status = check_name(conn, smb_fname->base_name);
1776 if (!NT_STATUS_IS_OK(status)) {
1777 return status;
1778 }
1779
1780 if (!posix_open) {
1781 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1782 if (file_existed) {
1783 existing_dos_attributes = dos_mode(conn, smb_fname);
1784 }
1785 }
1786
1787 /* ignore any oplock requests if oplocks are disabled */
1788 if (!lp_oplocks(SNUM(conn)) ||
1789 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1790 /* Mask off everything except the private Samba bits. */
1791 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1792 }
1793
1794 /* this is for OS/2 long file names - say we don't support them */
1795 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1796 /* OS/2 Workplace shell fix may be main code stream in a later
1797 * release. */
1798 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1799 "supported.\n"));
1800 if (use_nt_status()) {
1801 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1802 }
1803 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1804 }
1805
1806 switch( create_disposition ) {
1807 /*
1808 * Currently we're using FILE_SUPERSEDE as the same as
1809 * FILE_OVERWRITE_IF but they really are
1810 * different. FILE_SUPERSEDE deletes an existing file
1811 * (requiring delete access) then recreates it.
1812 */
1813 case FILE_SUPERSEDE:
1814 /* If file exists replace/overwrite. If file doesn't
1815 * exist create. */
1816 flags2 |= (O_CREAT | O_TRUNC);
1817 clear_ads = true;
1818 break;
1819
1820 case FILE_OVERWRITE_IF:
1821 /* If file exists replace/overwrite. If file doesn't
1822 * exist create. */
1823 flags2 |= (O_CREAT | O_TRUNC);
1824 clear_ads = true;
1825 break;
1826
1827 case FILE_OPEN:
1828 /* If file exists open. If file doesn't exist error. */
1829 if (!file_existed) {
1830 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1831 "requested for file %s and file "
1832 "doesn't exist.\n",
1833 smb_fname_str_dbg(smb_fname)));
1834 errno = ENOENT;
1835 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1836 }
1837 break;
1838
1839 case FILE_OVERWRITE:
1840 /* If file exists overwrite. If file doesn't exist
1841 * error. */
1842 if (!file_existed) {
1843 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1844 "requested for file %s and file "
1845 "doesn't exist.\n",
1846 smb_fname_str_dbg(smb_fname) ));
1847 errno = ENOENT;
1848 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1849 }
1850 flags2 |= O_TRUNC;
1851 clear_ads = true;
1852 break;
1853
1854 case FILE_CREATE:
1855 /* If file exists error. If file doesn't exist
1856 * create. */
1857 if (file_existed) {
1858 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1859 "requested for file %s and file "
1860 "already exists.\n",
1861 smb_fname_str_dbg(smb_fname)));
1862 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1863 errno = EISDIR;
1864 } else {
1865 errno = EEXIST;
1866 }
1867 return map_nt_error_from_unix(errno);
1868 }
1869 flags2 |= (O_CREAT|O_EXCL);
1870 break;
1871
1872 case FILE_OPEN_IF:
1873 /* If file exists open. If file doesn't exist
1874 * create. */
1875 flags2 |= O_CREAT;
1876 break;
1877
1878 default:
1879 return NT_STATUS_INVALID_PARAMETER;
1880 }
1881
1882 /* We only care about matching attributes on file exists and
1883 * overwrite. */
1884
1885 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1886 (create_disposition == FILE_OVERWRITE_IF))) {
1887 if (!open_match_attributes(conn, existing_dos_attributes,
1888 new_dos_attributes,
1889 smb_fname->st.st_ex_mode,
1890 unx_mode, &new_unx_mode)) {
1891 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1892 "for file %s (%x %x) (0%o, 0%o)\n",
1893 smb_fname_str_dbg(smb_fname),
1894 existing_dos_attributes,
1895 new_dos_attributes,
1896 (unsigned int)smb_fname->st.st_ex_mode,
1897 (unsigned int)unx_mode ));
1898 errno = EACCES;
1899 return NT_STATUS_ACCESS_DENIED;
1900 }
1901 }
1902
1903 status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1904 access_mask,
1905 &access_mask);
1906 if (!NT_STATUS_IS_OK(status)) {
1907 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1908 "on file %s returned %s\n",
1909 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1910 return status;
1911 }
1912
1913 open_access_mask = access_mask;
1914
1915 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1916 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1917 }
1918
1919 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1920 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1921 access_mask));
1922
1923 /*
1924 * Note that we ignore the append flag as append does not
1925 * mean the same thing under DOS and Unix.
1926 */
1927
1928 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1929 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1930 /* DENY_DOS opens are always underlying read-write on the
1931 file handle, no matter what the requested access mask
1932 says. */
1933 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1934 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1935 flags = O_RDWR;
1936 } else {
1937 flags = O_WRONLY;
1938 }
1939 } else {
1940 flags = O_RDONLY;
1941 }
1942
1943 /*
1944 * Currently we only look at FILE_WRITE_THROUGH for create options.
1945 */
1946
1947 #if defined(O_SYNC)
1948 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1949 flags2 |= O_SYNC;
1950 }
1951 #endif /* O_SYNC */
1952
1953 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1954 flags2 |= O_APPEND;
1955 }
1956
1957 if (!posix_open && !CAN_WRITE(conn)) {
1958 /*
1959 * We should really return a permission denied error if either
1960 * O_CREAT or O_TRUNC are set, but for compatibility with
1961 * older versions of Samba we just AND them out.
1962 */
1963 flags2 &= ~(O_CREAT|O_TRUNC);
1964 }
1965
1966 /*
1967 * Ensure we can't write on a read-only share or file.
1968 */
1969
1970 if (flags != O_RDONLY && file_existed &&
1971 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1972 DEBUG(5,("open_file_ntcreate: write access requested for "
1973 "file %s on read only %s\n",
1974 smb_fname_str_dbg(smb_fname),
1975 !CAN_WRITE(conn) ? "share" : "file" ));
1976 errno = EACCES;
1977 return NT_STATUS_ACCESS_DENIED;
1978 }
1979
1980 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1981 fsp->share_access = share_access;
1982 fsp->fh->private_options = private_flags;
1983 fsp->access_mask = open_access_mask; /* We change this to the
1984 * requested access_mask after
1985 * the open is done. */
1986 fsp->posix_open = posix_open;
1987
1988 /* Ensure no SAMBA_PRIVATE bits can be set. */
1989 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1990
1991 if (timeval_is_zero(&request_time)) {
1992 request_time = fsp->open_time;
1993 }
1994
1995 if (file_existed) {
1996 struct byte_range_lock *br_lck = NULL;
1997 struct share_mode_entry *batch_entry = NULL;
1998 struct share_mode_entry *exclusive_entry = NULL;
1999 bool got_level2_oplock = false;
2000 bool got_a_none_oplock = false;
2001
2002 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2003 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2004
2005 if (!acquire_ordered_locks(talloc_tos(),
2006 fsp,
2007 id,
2008 conn->connectpath,
2009 smb_fname,
2010 &old_write_time,
2011 &lck,
2012 &br_lck)) {
2013 return NT_STATUS_SHARING_VIOLATION;
2014 }
2015
2016 /* Get the types we need to examine. */
2017 find_oplock_types(fsp,
2018 oplock_request,
2019 lck,
2020 &batch_entry,
2021 &exclusive_entry,
2022 &got_level2_oplock,
2023 &got_a_none_oplock);
2024
2025 /* First pass - send break only on batch oplocks. */
2026 if ((req != NULL) &&
2027 delay_for_batch_oplocks(fsp,
2028 req->mid,
2029 oplock_request,
2030 batch_entry)) {
2031 schedule_defer_open(lck, request_time, req);
2032 TALLOC_FREE(lck);
2033 return NT_STATUS_SHARING_VIOLATION;
2034 }
2035
2036 /* Use the client requested access mask here, not the one we
2037 * open with. */
2038 status = open_mode_check(conn, lck, fsp->name_hash,
2039 access_mask, share_access,
2040 create_options, &file_existed);
2041
2042 if (NT_STATUS_IS_OK(status)) {
2043 /* We might be going to allow this open. Check oplock
2044 * status again. */
2045 /* Second pass - send break for both batch or
2046 * exclusive oplocks. */
2047 if ((req != NULL) &&
2048 delay_for_exclusive_oplocks(
2049 fsp,
2050 req->mid,
2051 oplock_request,
2052 exclusive_entry)) {
2053 schedule_defer_open(lck, request_time, req);
2054 TALLOC_FREE(lck);
2055 return NT_STATUS_SHARING_VIOLATION;
2056 }
2057 }
2058
2059 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2060 /* DELETE_PENDING is not deferred for a second */
2061 TALLOC_FREE(lck);
2062 return status;
2063 }
2064
2065 grant_fsp_oplock_type(fsp,
2066 br_lck,
2067 oplock_request,
2068 got_level2_oplock,
2069 got_a_none_oplock);
2070
2071 if (!NT_STATUS_IS_OK(status)) {
2072 uint32 can_access_mask;
2073 bool can_access = True;
2074
2075 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2076
2077 /* Check if this can be done with the deny_dos and fcb
2078 * calls. */
2079 if (private_flags &
2080 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2081 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2082 if (req == NULL) {
2083 DEBUG(0, ("DOS open without an SMB "
2084 "request!\n"));
2085 TALLOC_FREE(lck);
2086 return NT_STATUS_INTERNAL_ERROR;
2087 }
2088
2089 /* Use the client requested access mask here,
2090 * not the one we open with. */
2091 status = fcb_or_dos_open(req,
2092 conn,
2093 fsp,
2094 smb_fname,
2095 id,
2096 req->smbpid,
2097 req->vuid,
2098 access_mask,
2099 share_access,
2100 create_options);
2101
2102 if (NT_STATUS_IS_OK(status)) {
2103 TALLOC_FREE(lck);
2104 if (pinfo) {
2105 *pinfo = FILE_WAS_OPENED;
2106 }
2107 return NT_STATUS_OK;
2108 }
2109 }
2110
2111 /*
2112 * This next line is a subtlety we need for
2113 * MS-Access. If a file open will fail due to share
2114 * permissions and also for security (access) reasons,
2115 * we need to return the access failed error, not the
2116 * share error. We can't open the file due to kernel
2117 * oplock deadlock (it's possible we failed above on
2118 * the open_mode_check()) so use a userspace check.
2119 */
2120
2121 if (flags & O_RDWR) {
2122 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2123 } else if (flags & O_WRONLY) {
2124 can_access_mask = FILE_WRITE_DATA;
2125 } else {
2126 can_access_mask = FILE_READ_DATA;
2127 }
2128
2129 if (((can_access_mask & FILE_WRITE_DATA) &&
2130 !CAN_WRITE(conn)) ||
2131 !can_access_file_data(conn, smb_fname,
2132 can_access_mask)) {
2133 can_access = False;
2134 }
2135
2136 /*
2137 * If we're returning a share violation, ensure we
2138 * cope with the braindead 1 second delay.
2139 */
2140
2141 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2142 lp_defer_sharing_violations()) {
2143 struct timeval timeout;
2144 struct deferred_open_record state;
2145 int timeout_usecs;
2146
2147 /* this is a hack to speed up torture tests
2148 in 'make test' */
2149 timeout_usecs = lp_parm_int(SNUM(conn),
2150 "smbd","sharedelay",
2151 SHARING_VIOLATION_USEC_WAIT);
2152
2153 /* This is a relative time, added to the absolute
2154 request_time value to get the absolute timeout time.
2155 Note that if this is the second or greater time we enter
2156 this codepath for this particular request mid then
2157 request_time is left as the absolute time of the *first*
2158 time this request mid was processed. This is what allows
2159 the request to eventually time out. */
2160
2161 timeout = timeval_set(0, timeout_usecs);
2162
2163 /* Nothing actually uses state.delayed_for_oplocks
2164 but it's handy to differentiate in debug messages
2165 between a 30 second delay due to oplock break, and
2166 a 1 second delay for share mode conflicts. */
2167
2168 state.delayed_for_oplocks = False;
2169 state.id = id;
2170
2171 if ((req != NULL)
2172 && !request_timed_out(request_time,
2173 timeout)) {
2174 defer_open(lck, request_time, timeout,
2175 req, &state);
2176 }
2177 }
2178
2179 TALLOC_FREE(lck);
2180 if (can_access) {
2181 /*
2182 * We have detected a sharing violation here
2183 * so return the correct error code
2184 */
2185 status = NT_STATUS_SHARING_VIOLATION;
2186 } else {
2187 status = NT_STATUS_ACCESS_DENIED;
2188 }
2189 return status;
2190 }
2191
2192 /*
2193 * We exit this block with the share entry *locked*.....
2194 */
2195 }
2196
2197 SMB_ASSERT(!file_existed || (lck != NULL));
2198
2199 /*
2200 * Ensure we pay attention to default ACLs on directories if required.
2201 */
2202
2203 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2204 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2205 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2206 }
2207
2208 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2209 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2210 (unsigned int)flags, (unsigned int)flags2,
2211 (unsigned int)unx_mode, (unsigned int)access_mask,
2212 (unsigned int)open_access_mask));
2213
2214 /*
2215 * open_file strips any O_TRUNC flags itself.
2216 */
2217
2218 fsp_open = open_file(fsp, conn, req, parent_dir,
2219 flags|flags2, unx_mode, access_mask,
2220 open_access_mask);
2221
2222 if (!NT_STATUS_IS_OK(fsp_open)) {
2223 TALLOC_FREE(lck);
2224 return fsp_open;
2225 }
2226
2227 if (!file_existed) {
2228 struct byte_range_lock *br_lck = NULL;
2229 struct share_mode_entry *batch_entry = NULL;
2230 struct share_mode_entry *exclusive_entry = NULL;
2231 bool got_level2_oplock = false;
2232 bool got_a_none_oplock = false;
2233 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2234 /*
2235 * Deal with the race condition where two smbd's detect the
2236 * file doesn't exist and do the create at the same time. One
2237 * of them will win and set a share mode, the other (ie. this
2238 * one) should check if the requested share mode for this
2239 * create is allowed.
2240 */
2241
2242 /*
2243 * Now the file exists and fsp is successfully opened,
2244 * fsp->dev and fsp->inode are valid and should replace the
2245 * dev=0,inode=0 from a non existent file. Spotted by
2246 * Nadav Danieli <nadavd@exanet.com>. JRA.
2247 */
2248
2249 id = fsp->file_id;
2250
2251 if (!acquire_ordered_locks(talloc_tos(),
2252 fsp,
2253 id,
2254 conn->connectpath,
2255 smb_fname,
2256 &old_write_time,
2257 &lck,
2258 &br_lck)) {
2259 return NT_STATUS_SHARING_VIOLATION;
2260 }
2261
2262 /* Get the types we need to examine. */
2263 find_oplock_types(fsp,
2264 oplock_request,
2265 lck,
2266 &batch_entry,
2267 &exclusive_entry,
2268 &got_level2_oplock,
2269 &got_a_none_oplock);
2270
2271 /* First pass - send break only on batch oplocks. */
2272 if ((req != NULL) &&
2273 delay_for_batch_oplocks(fsp,
2274 req->mid,
2275 oplock_request,
2276 batch_entry)) {
2277 schedule_defer_open(lck, request_time, req);
2278 TALLOC_FREE(lck);
2279 fd_close(fsp);
2280 return NT_STATUS_SHARING_VIOLATION;
2281 }
2282
2283 status = open_mode_check(conn, lck, fsp->name_hash,
2284 access_mask, share_access,
2285 create_options, &file_existed);
2286
2287 if (NT_STATUS_IS_OK(status)) {
2288 /* We might be going to allow this open. Check oplock
2289 * status again. */
2290 /* Second pass - send break for both batch or
2291 * exclusive oplocks. */
2292 if ((req != NULL) &&
2293 delay_for_exclusive_oplocks(
2294 fsp,
2295 req->mid,
2296 oplock_request,
2297 exclusive_entry)) {
2298 schedule_defer_open(lck, request_time, req);
2299 TALLOC_FREE(lck);
2300 fd_close(fsp);
2301 return NT_STATUS_SHARING_VIOLATION;
2302 }
2303 }
2304
2305 if (!NT_STATUS_IS_OK(status)) {
2306 struct deferred_open_record state;
2307
2308 state.delayed_for_oplocks = False;
2309 state.id = id;
2310
2311 /* Do it all over again immediately. In the second
2312 * round we will find that the file existed and handle
2313 * the DELETE_PENDING and FCB cases correctly. No need
2314 * to duplicate the code here. Essentially this is a
2315 * "goto top of this function", but don't tell
2316 * anybody... */
2317
2318 if (req != NULL) {
2319 defer_open(lck, request_time, timeval_zero(),
2320 req, &state);
2321 }
2322 TALLOC_FREE(lck);
2323 fd_close(fsp);
2324 return status;
2325 }
2326
2327 grant_fsp_oplock_type(fsp,
2328 br_lck,
2329 oplock_request,
2330 got_level2_oplock,
2331 got_a_none_oplock);
2332
2333 /*
2334 * We exit this block with the share entry *locked*.....
2335 */
2336
2337 }
2338
2339 SMB_ASSERT(lck != NULL);
2340
2341 /* Delete streams if create_disposition requires it */
2342 if (file_existed && clear_ads &&
2343 !is_ntfs_stream_smb_fname(smb_fname)) {
2344 status = delete_all_streams(conn, smb_fname->base_name);
2345 if (!NT_STATUS_IS_OK(status)) {
2346 TALLOC_FREE(lck);
2347 fd_close(fsp);
2348 return status;
2349 }
2350 }
2351
2352 /* note that we ignore failure for the following. It is
2353 basically a hack for NFS, and NFS will never set one of
2354 these only read them. Nobody but Samba can ever set a deny
2355 mode and we have already checked our more authoritative
2356 locking database for permission to set this deny mode. If
2357 the kernel refuses the operations then the kernel is wrong.
2358 note that GPFS supports it as well - jmcd */
2359
2360 if (fsp->fh->fd != -1) {
2361 int ret_flock;
2362 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2363 if(ret_flock == -1 ){
2364
2365 TALLOC_FREE(lck);
2366 fd_close(fsp);
2367
2368 return NT_STATUS_SHARING_VIOLATION;
2369 }
2370 }
2371
2372 /*
2373 * At this point onwards, we can guarentee that the share entry
2374 * is locked, whether we created the file or not, and that the
2375 * deny mode is compatible with all current opens.
2376 */
2377
2378 /*
2379 * If requested, truncate the file.
2380 */
2381
2382 if (file_existed && (flags2&O_TRUNC)) {
2383 /*
2384 * We are modifing the file after open - update the stat
2385 * struct..
2386 */
2387 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2388 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2389 status = map_nt_error_from_unix(errno);
2390 TALLOC_FREE(lck);
2391 fd_close(fsp);
2392 return status;
2393 }
2394 }
2395
2396 /*
2397 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2398 * but we don't have to store this - just ignore it on access check.
2399 */
2400 if (conn->sconn->using_smb2) {
2401 /*
2402 * SMB2 doesn't return it (according to Microsoft tests).
2403 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2404 * File created with access = 0x7 (Read, Write, Delete)
2405 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2406 */
2407 fsp->access_mask = access_mask;
2408 } else {
2409 /* But SMB1 does. */
2410 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2411 }
2412
2413 if (file_existed) {
2414 /* stat opens on existing files don't get oplocks. */
2415 if (is_stat_open(open_access_mask)) {
2416 fsp->oplock_type = NO_OPLOCK;
2417 }
2418
2419 if (!(flags2 & O_TRUNC)) {
2420 info = FILE_WAS_OPENED;
2421 } else {
2422 info = FILE_WAS_OVERWRITTEN;
2423 }
2424 } else {
2425 info = FILE_WAS_CREATED;
2426 }
2427
2428 if (pinfo) {
2429 *pinfo = info;
2430 }
2431
2432 /*
2433 * Setup the oplock info in both the shared memory and
2434 * file structs.
2435 */
2436
2437 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2438 /*
2439 * Could not get the kernel oplock or there are byte-range
2440 * locks on the file.
2441 */
2442 fsp->oplock_type = NO_OPLOCK;
2443 }
2444
2445 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2446 new_file_created = True;
2447 }
2448
2449 set_share_mode(lck, fsp, get_current_uid(conn),
2450 req ? req->mid : 0,
2451 fsp->oplock_type);
2452
2453 /* Handle strange delete on close create semantics. */
2454 if (create_options & FILE_DELETE_ON_CLOSE) {
2455
2456 status = can_set_delete_on_close(fsp, new_dos_attributes);
2457
2458 if (!NT_STATUS_IS_OK(status)) {
2459 /* Remember to delete the mode we just added. */
2460 del_share_mode(lck, fsp);
2461 TALLOC_FREE(lck);
2462 fd_close(fsp);
2463 return status;
2464 }
2465 /* Note that here we set the *inital* delete on close flag,
2466 not the regular one. The magic gets handled in close. */
2467 fsp->initial_delete_on_close = True;
2468 }
2469
2470 if (new_file_created) {
2471 /* Files should be initially set as archive */
2472 if (lp_map_archive(SNUM(conn)) ||
2473 lp_store_dos_attributes(SNUM(conn))) {
2474 if (!posix_open) {
2475 if (file_set_dosmode(conn, smb_fname,
2476 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2477 parent_dir, true) == 0) {
2478 unx_mode = smb_fname->st.st_ex_mode;
2479 }
2480 }
2481 }
2482 }
2483
2484 /* Determine sparse flag. */
2485 if (posix_open) {
2486 /* POSIX opens are sparse by default. */
2487 fsp->is_sparse = true;
2488 } else {
2489 fsp->is_sparse = (file_existed &&
2490 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2491 }
2492
2493 /*
2494 * Take care of inherited ACLs on created files - if default ACL not
2495 * selected.
2496 */
2497
2498 if (!posix_open && !file_existed && !def_acl) {
2499
2500 int saved_errno = errno; /* We might get ENOSYS in the next
2501 * call.. */
2502
2503 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2504 errno == ENOSYS) {
2505 errno = saved_errno; /* Ignore ENOSYS */
2506 }
2507
2508 } else if (new_unx_mode) {
2509
2510 int ret = -1;
2511
2512 /* Attributes need changing. File already existed. */
2513
2514 {
2515 int saved_errno = errno; /* We might get ENOSYS in the
2516 * next call.. */
2517 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2518
2519 if (ret == -1 && errno == ENOSYS) {
2520 errno = saved_errno; /* Ignore ENOSYS */
2521 } else {
2522 DEBUG(5, ("open_file_ntcreate: reset "
2523 "attributes of file %s to 0%o\n",
2524 smb_fname_str_dbg(smb_fname),
2525 (unsigned int)new_unx_mode));
2526 ret = 0; /* Don't do the fchmod below. */
2527 }
2528 }
2529
2530 if ((ret == -1) &&
2531 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2532 DEBUG(5, ("open_file_ntcreate: failed to reset "
2533 "attributes of file %s to 0%o\n",
2534 smb_fname_str_dbg(smb_fname),
2535 (unsigned int)new_unx_mode));
2536 }
2537
2538 /* If this is a successful open, we must remove any deferred open
2539 * records. */
2540 if (req != NULL) {
2541 del_deferred_open_entry(lck, req->mid,
2542 sconn_server_id(req->sconn));
2543 }
2544 TALLOC_FREE(lck);
2545
2546 return NT_STATUS_OK;
2547 }
2548
2549
2550 /****************************************************************************
2551 Open a file for for write to ensure that we can fchmod it.
2552 ****************************************************************************/
2553
2554 NTSTATUS open_file_fchmod(connection_struct *conn,
2555 struct smb_filename *smb_fname,
2556 files_struct **result)
2557 {
2558 if (!VALID_STAT(smb_fname->st)) {
2559 return NT_STATUS_INVALID_PARAMETER;
2560 }
2561
2562 return SMB_VFS_CREATE_FILE(
2563 conn, /* conn */
2564 NULL, /* req */
2565 0, /* root_dir_fid */
2566 smb_fname, /* fname */
2567 FILE_WRITE_DATA, /* access_mask */
2568 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2569 FILE_SHARE_DELETE),
2570 FILE_OPEN, /* create_disposition*/
2571 0, /* create_options */
2572 0, /* file_attributes */
2573 INTERNAL_OPEN_ONLY, /* oplock_request */
2574 0, /* allocation_size */
2575 0, /* private_flags */
2576 NULL, /* sd */
2577 NULL, /* ea_list */
2578 result, /* result */
2579 NULL); /* pinfo */
2580 }
2581
2582 static NTSTATUS mkdir_internal(connection_struct *conn,
2583 struct smb_filename *smb_dname,
2584 uint32 file_attributes)
2585 {
2586 mode_t mode;
2587 char *parent_dir;
2588 NTSTATUS status;
2589 bool posix_open = false;
2590 bool need_re_stat = false;
2591
2592 if(!CAN_WRITE(conn)) {
2593 DEBUG(5,("mkdir_internal: failing create on read-only share "
2594 "%s\n", lp_servicename(SNUM(conn))));
2595 return NT_STATUS_ACCESS_DENIED;
2596 }
2597
2598 status = check_name(conn, smb_dname->base_name);
2599 if (!NT_STATUS_IS_OK(status)) {
2600 return status;
2601 }
2602
2603 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2604 NULL)) {
2605 return NT_STATUS_NO_MEMORY;
2606 }
2607
2608 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2609 posix_open = true;
2610 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2611 } else {
2612 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2613 }
2614
2615 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2616 return map_nt_error_from_unix(errno);
2617 }
2618
2619 /* Ensure we're checking for a symlink here.... */
2620 /* We don't want to get caught by a symlink racer. */
2621
2622 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2623 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2624 smb_fname_str_dbg(smb_dname), strerror(errno)));
2625 return map_nt_error_from_unix(errno);
2626 }
2627
2628 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2629 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2630 smb_fname_str_dbg(smb_dname)));
2631 return NT_STATUS_ACCESS_DENIED;
2632 }
2633
2634 if (lp_store_dos_attributes(SNUM(conn))) {
2635 if (!posix_open) {
2636 file_set_dosmode(conn, smb_dname,
2637 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2638 parent_dir, true);
2639 }
2640 }
2641
2642 if (lp_inherit_perms(SNUM(conn))) {
2643 inherit_access_posix_acl(conn, parent_dir,
2644 smb_dname->base_name, mode);
2645 need_re_stat = true;
2646 }
2647
2648 if (!posix_open) {
2649 /*
2650 * Check if high bits should have been set,
2651 * then (if bits are missing): add them.
2652 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2653 * dir.
2654 */
2655 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2656 (mode & ~smb_dname->st.st_ex_mode)) {
2657 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2658 (smb_dname->st.st_ex_mode |
2659 (mode & ~smb_dname->st.st_ex_mode)));
2660 need_re_stat = true;
2661 }
2662 }
2663
2664 /* Change the owner if required. */
2665 if (lp_inherit_owner(SNUM(conn))) {
2666 change_dir_owner_to_parent(conn, parent_dir,
2667 smb_dname->base_name,
2668 &smb_dname->st);
2669 need_re_stat = true;
2670 }
2671
2672 if (need_re_stat) {
2673 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2674 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2675 smb_fname_str_dbg(smb_dname), strerror(errno)));
2676 return map_nt_error_from_unix(errno);
2677 }
2678 }
2679
2680 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2681 smb_dname->base_name);
2682
2683 return NT_STATUS_OK;
2684 }
2685
2686 /****************************************************************************
2687 Ensure we didn't get symlink raced on opening a directory.
2688 ****************************************************************************/
2689
2690 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2691 const SMB_STRUCT_STAT *sbuf2)
2692 {
2693 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2694 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2695 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2696 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2697 return false;
2698 }
2699 return true;
2700 }
2701
2702 /****************************************************************************
2703 Open a directory from an NT SMB call.
2704 ****************************************************************************/
2705
2706 static NTSTATUS open_directory(connection_struct *conn,
2707 struct smb_request *req,
2708 struct smb_filename *smb_dname,
2709 uint32 access_mask,
2710 uint32 share_access,
2711 uint32 create_disposition,
2712 uint32 create_options,
2713 uint32 file_attributes,
2714 int *pinfo,
2715 files_struct **result)
2716 {
2717 files_struct *fsp = NULL;
2718 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2719 struct share_mode_lock *lck = NULL;
2720 NTSTATUS status;
2721 struct timespec mtimespec;
2722 int info = 0;
2723
2724 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2725
2726 /* Ensure we have a directory attribute. */
2727 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2728
2729 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2730 "share_access = 0x%x create_options = 0x%x, "
2731 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2732 smb_fname_str_dbg(smb_dname),
2733 (unsigned int)access_mask,
2734 (unsigned int)share_access,
2735 (unsigned int)create_options,
2736 (unsigned int)create_disposition,
2737 (unsigned int)file_attributes));
2738
2739 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2740 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2741 is_ntfs_stream_smb_fname(smb_dname)) {
2742 DEBUG(2, ("open_directory: %s is a stream name!\n",
2743 smb_fname_str_dbg(smb_dname)));
2744 return NT_STATUS_NOT_A_DIRECTORY;
2745 }
2746
2747 status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2748 access_mask, &access_mask);
2749 if (!NT_STATUS_IS_OK(status)) {
2750 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2751 "on file %s returned %s\n",
2752 smb_fname_str_dbg(smb_dname),
2753 nt_errstr(status)));
2754 return status;
2755 }
2756
2757 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2758 !security_token_has_privilege(get_current_nttok(conn),
2759 SEC_PRIV_SECURITY)) {
2760 DEBUG(10, ("open_directory: open on %s "
2761 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2762 smb_fname_str_dbg(smb_dname)));
2763 return NT_STATUS_PRIVILEGE_NOT_HELD;
2764 }
2765
2766 switch( create_disposition ) {
2767 case FILE_OPEN:
2768
2769 if (!dir_existed) {
2770 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2771 }
2772
2773 info = FILE_WAS_OPENED;
2774 break;
2775
2776 case FILE_CREATE:
2777
2778 /* If directory exists error. If directory doesn't
2779 * exist create. */
2780
2781 status = mkdir_internal(conn, smb_dname,
2782 file_attributes);
2783
2784 if (!NT_STATUS_IS_OK(status)) {
2785 DEBUG(2, ("open_directory: unable to create "
2786 "%s. Error was %s\n",
2787 smb_fname_str_dbg(smb_dname),
2788 nt_errstr(status)));
2789 return status;
2790 }
2791
2792 info = FILE_WAS_CREATED;
2793 break;
2794
2795 case FILE_OPEN_IF:
2796 /*
2797 * If directory exists open. If directory doesn't
2798 * exist create.
2799 */
2800
2801 status = mkdir_internal(conn, smb_dname,
2802 file_attributes);
2803
2804 if (NT_STATUS_IS_OK(status)) {
2805 info = FILE_WAS_CREATED;
2806 }
2807
2808 if (NT_STATUS_EQUAL(status,
2809 NT_STATUS_OBJECT_NAME_COLLISION)) {
2810 info = FILE_WAS_OPENED;
2811 status = NT_STATUS_OK;
2812 }
2813 break;
2814
2815 case FILE_SUPERSEDE:
2816 case FILE_OVERWRITE:
2817 case FILE_OVERWRITE_IF:
2818 default:
2819 DEBUG(5,("open_directory: invalid create_disposition "
2820 "0x%x for directory %s\n",
2821 (unsigned int)create_disposition,
2822 smb_fname_str_dbg(smb_dname)));
2823 return NT_STATUS_INVALID_PARAMETER;
2824 }
2825
2826 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2827 DEBUG(5,("open_directory: %s is not a directory !\n",
2828 smb_fname_str_dbg(smb_dname)));
2829 return NT_STATUS_NOT_A_DIRECTORY;
2830 }
2831
2832 if (info == FILE_WAS_OPENED) {
2833 uint32_t access_granted = 0;
2834 status = smbd_check_open_rights(conn, smb_dname, access_mask,
2835 &access_granted);
2836
2837 /* Were we trying to do a directory open
2838 * for delete and didn't get DELETE
2839 * access (only) ? Check if the
2840 * directory allows DELETE_CHILD.
2841 * See here:
2842 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
2843 * for details. */
2844
2845 if ((NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
2846 (access_mask & DELETE_ACCESS) &&
2847 (access_granted == DELETE_ACCESS) &&
2848 can_delete_file_in_directory(conn, smb_dname))) {
2849 DEBUG(10,("open_directory: overrode ACCESS_DENIED "
2850 "on directory %s\n",
2851 smb_fname_str_dbg(smb_dname)));
2852 status = NT_STATUS_OK;
2853 }
2854
2855 if (!NT_STATUS_IS_OK(status)) {
2856 DEBUG(10, ("open_directory: smbd_check_open_rights on "
2857 "file %s failed with %s\n",
2858 smb_fname_str_dbg(smb_dname),
2859 nt_errstr(status)));
2860 return status;
2861 }
2862 }
2863
2864 status = file_new(req, conn, &fsp);
2865 if(!NT_STATUS_IS_OK(status)) {
2866 return status;
2867 }
2868
2869 /*
2870 * Setup the files_struct for it.
2871 */
2872
2873 fsp->mode = smb_dname->st.st_ex_mode;
2874 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2875 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2876 fsp->file_pid = req ? req->smbpid : 0;
2877 fsp->can_lock = False;
2878 fsp->can_read = False;
2879 fsp->can_write = False;
2880
2881 fsp->share_access = share_access;
2882 fsp->fh->private_options = 0;
2883 /*
2884 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2885 */
2886 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2887 fsp->print_file = NULL;
2888 fsp->modified = False;
2889 fsp->oplock_type = NO_OPLOCK;
2890 fsp->sent_oplock_break = NO_BREAK_SENT;
2891 fsp->is_directory = True;
2892 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2893 status = fsp_set_smb_fname(fsp, smb_dname);
2894 if (!NT_STATUS_IS_OK(status)) {
2895 file_free(req, fsp);
2896 return status;
2897 }
2898
2899 mtimespec = smb_dname->st.st_ex_mtime;
2900
2901 #ifdef O_DIRECTORY
2902 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2903 #else
2904 /* POSIX allows us to open a directory with O_RDONLY. */
2905 status = fd_open(conn, fsp, O_RDONLY, 0);
2906 #endif
2907 if (!NT_STATUS_IS_OK(status)) {
2908 DEBUG(5, ("open_directory: Could not open fd for "
2909 "%s (%s)\n",
2910 smb_fname_str_dbg(smb_dname),
2911 nt_errstr(status)));
2912 file_free(req, fsp);
2913 return status;
2914 }
2915
2916 status = vfs_stat_fsp(fsp);
2917 if (!NT_STATUS_IS_OK(status)) {
2918 fd_close(fsp);
2919 file_free(req, fsp);
2920 return status;
2921 }
2922
2923 /* Ensure there was no race condition. */
2924 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2925 DEBUG(5,("open_directory: stat struct differs for "
2926 "directory %s.\n",
2927 smb_fname_str_dbg(smb_dname)));
2928 fd_close(fsp);
2929 file_free(req, fsp);
2930 return NT_STATUS_ACCESS_DENIED;
2931 }
2932
2933 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2934 conn->connectpath, smb_dname, &mtimespec);
2935
2936 if (lck == NULL) {
2937 DEBUG(0, ("open_directory: Could not get share mode lock for "
2938 "%s\n", smb_fname_str_dbg(smb_dname)));
2939 fd_close(fsp);
2940 file_free(req, fsp);
2941 return NT_STATUS_SHARING_VIOLATION;
2942 }
2943
2944 status = open_mode_check(conn, lck, fsp->name_hash,
2945 access_mask, share_access,
2946 create_options, &dir_existed);
2947
2948 if (!NT_STATUS_IS_OK(status)) {
2949 TALLOC_FREE(lck);
2950 fd_close(fsp);
2951 file_free(req, fsp);
2952 return status;
2953 }
2954
2955 set_share_mode(lck, fsp, get_current_uid(conn),
2956 req ? req->mid : 0, NO_OPLOCK);
2957
2958 /* For directories the delete on close bit at open time seems
2959 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2960 if (create_options & FILE_DELETE_ON_CLOSE) {
2961 status = can_set_delete_on_close(fsp, 0);
2962 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2963 TALLOC_FREE(lck);
2964 fd_close(fsp);
2965 file_free(req, fsp);
2966 return status;
2967 }
2968
2969 if (NT_STATUS_IS_OK(status)) {
2970 /* Note that here we set the *inital* delete on close flag,
2971 not the regular one. The magic gets handled in close. */
2972 fsp->initial_delete_on_close = True;
2973 }
2974 }
2975
2976 TALLOC_FREE(lck);
2977
2978 if (pinfo) {
2979 *pinfo = info;
2980 }
2981
2982 *result = fsp;
2983 return NT_STATUS_OK;
2984 }
2985
2986 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2987 struct smb_filename *smb_dname)
2988 {
2989 NTSTATUS status;
2990 files_struct *fsp;
2991
2992 status = SMB_VFS_CREATE_FILE(
2993 conn, /* conn */
2994 req, /* req */
2995 0, /* root_dir_fid */
2996 smb_dname, /* fname */
2997 FILE_READ_ATTRIBUTES, /* access_mask */
2998 FILE_SHARE_NONE, /* share_access */
2999 FILE_CREATE, /* create_disposition*/
3000 FILE_DIRECTORY_FILE, /* create_options */
3001 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
3002 0, /* oplock_request */
3003 0, /* allocation_size */
3004 0, /* private_flags */
3005 NULL, /* sd */
3006 NULL, /* ea_list */
3007 &fsp, /* result */
3008 NULL); /* pinfo */
3009
3010 if (NT_STATUS_IS_OK(status)) {
3011 close_file(req, fsp, NORMAL_CLOSE);
3012 }
3013
3014 return status;
3015 }
3016
3017 /****************************************************************************
3018 Receive notification that one of our open files has been renamed by another
3019 smbd process.
3020 ****************************************************************************/
3021
3022 void msg_file_was_renamed(struct messaging_context *msg,
3023 void *private_data,
3024 uint32_t msg_type,
3025 struct server_id server_id,
3026 DATA_BLOB *data)
3027 {
3028 struct smbd_server_connection *sconn;
3029 files_struct *fsp;
3030 char *frm = (char *)data->data;
3031 struct file_id id;
3032 const char *sharepath;
3033 const char *base_name;
3034 const char *stream_name;
3035 struct smb_filename *smb_fname = NULL;
3036 size_t sp_len, bn_len;
3037 NTSTATUS status;
3038
3039 sconn = msg_ctx_to_sconn(msg);
3040 if (sconn == NULL) {
3041 DEBUG(1, ("could not find sconn\n"));
3042 return;
3043 }
3044
3045 if (data->data == NULL
3046 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3047 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3048 (int)data->length));
3049 return;
3050 }
3051
3052 /* Unpack the message. */
3053 pull_file_id_24(frm, &id);
3054 sharepath = &frm[24];
3055 sp_len = strlen(sharepath);
3056 base_name = sharepath + sp_len + 1;
3057 bn_len = strlen(base_name);
3058 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3059
3060 /* stream_name must always be NULL if there is no stream. */
3061 if (stream_name[0] == '\0') {
3062 stream_name = NULL;
3063 }
3064
3065 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3066 stream_name, NULL, &smb_fname);
3067 if (!NT_STATUS_IS_OK(status)) {
3068 return;
3069 }
3070
3071 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3072 "file_id %s\n",
3073 sharepath, smb_fname_str_dbg(smb_fname),
3074 file_id_string_tos(&id)));
3075
3076 for(fsp = file_find_di_first(sconn, id); fsp;
3077 fsp = file_find_di_next(fsp)) {
3078 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3079
3080 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3081 fsp->fnum, fsp_str_dbg(fsp),
3082 smb_fname_str_dbg(smb_fname)));
3083 status = fsp_set_smb_fname(fsp, smb_fname);
3084 if (!NT_STATUS_IS_OK(status)) {
3085 goto out;
3086 }
3087 } else {
3088 /* TODO. JRA. */
3089 /* Now we have the complete path we can work out if this is
3090 actually within this share and adjust newname accordingly. */
3091 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3092 "not sharepath %s) "
3093 "fnum %d from %s -> %s\n",
3094 fsp->conn->connectpath,
3095 sharepath,
3096 fsp->fnum,
3097 fsp_str_dbg(fsp),
3098 smb_fname_str_dbg(smb_fname)));
3099 }
3100 }
3101 out:
3102 TALLOC_FREE(smb_fname);
3103 return;
3104 }
3105
3106 /*
3107 * If a main file is opened for delete, all streams need to be checked for
3108 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3109 * If that works, delete them all by setting the delete on close and close.
3110 */
3111
3112 NTSTATUS open_streams_for_delete(connection_struct *conn,
3113 const char *fname)
3114 {
3115 struct stream_struct *stream_info;
3116 files_struct **streams;
3117 int i;
3118 unsigned int num_streams;
3119 TALLOC_CTX *frame = talloc_stackframe();
3120 NTSTATUS status;
3121
3122 status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
3123 &num_streams, &stream_info);
3124
3125 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3126 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3127 DEBUG(10, ("no streams around\n"));
3128 TALLOC_FREE(frame);
3129 return NT_STATUS_OK;
3130 }
3131
3132 if (!NT_STATUS_IS_OK(status)) {
3133 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
3134 nt_errstr(status)));
3135 goto fail;
3136 }
3137
3138 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3139 num_streams));
3140
3141 if (num_streams == 0) {
3142 TALLOC_FREE(frame);
3143 return NT_STATUS_OK;
3144 }
3145
3146 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3147 if (streams == NULL) {
3148 DEBUG(0, ("talloc failed\n"));
3149 status = NT_STATUS_NO_MEMORY;
3150 goto fail;
3151 }
3152
3153 for (i=0; i<num_streams; i++) {
3154 struct smb_filename *smb_fname = NULL;
3155
3156 if (strequal(stream_info[i].name, "::$DATA")) {
3157 streams[i] = NULL;
3158 continue;
3159 }
3160
3161 status = create_synthetic_smb_fname(talloc_tos(), fname,
3162 stream_info[i].name,
3163 NULL, &smb_fname);
3164 if (!NT_STATUS_IS_OK(status)) {
3165 goto fail;
3166 }
3167
3168 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3169 DEBUG(10, ("Unable to stat stream: %s\n",
3170 smb_fname_str_dbg(smb_fname)));
3171 }
3172
3173 status = SMB_VFS_CREATE_FILE(
3174 conn, /* conn */
3175 NULL, /* req */
3176 0, /* root_dir_fid */
3177 smb_fname, /* fname */
3178 DELETE_ACCESS, /* access_mask */
3179 (FILE_SHARE_READ | /* share_access */
3180 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3181 FILE_OPEN, /* create_disposition*/
3182 0, /* create_options */
3183 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3184 0, /* oplock_request */
3185 0, /* allocation_size */
3186 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3187 NULL, /* sd */
3188 NULL, /* ea_list */
3189 &streams[i], /* result */
3190 NULL); /* pinfo */
3191
3192 if (!NT_STATUS_IS_OK(status)) {
3193 DEBUG(10, ("Could not open stream %s: %s\n",
3194 smb_fname_str_dbg(smb_fname),
3195 nt_errstr(status)));
3196
3197 TALLOC_FREE(smb_fname);
3198 break;
3199 }
3200 TALLOC_FREE(smb_fname);
3201 }
3202
3203 /*
3204 * don't touch the variable "status" beyond this point :-)
3205 */
3206
3207 for (i -= 1 ; i >= 0; i--) {
3208 if (streams[i] == NULL) {
3209 continue;
3210 }
3211
3212 DEBUG(10, ("Closing stream # %d, %s\n", i,
3213 fsp_str_dbg(streams[i])));
3214 close_file(NULL, streams[i], NORMAL_CLOSE);
3215 }
3216
3217 fail:
3218 TALLOC_FREE(frame);
3219 return status;
3220 }
3221
3222 /*
3223 * Wrapper around open_file_ntcreate and open_directory
3224 */
3225
3226 static NTSTATUS create_file_unixpath(connection_struct *conn,
3227 struct smb_request *req,
3228 struct smb_filename *smb_fname,
3229 uint32_t access_mask,
3230 uint32_t share_access,
3231 uint32_t create_disposition,
3232 uint32_t create_options,
3233 uint32_t file_attributes,
3234 uint32_t oplock_request,
3235 uint64_t allocation_size,
3236 uint32_t private_flags,
3237 struct security_descriptor *sd,
3238 struct ea_list *ea_list,
3239
3240 files_struct **result,
3241 int *pinfo)
3242 {
3243 int info = FILE_WAS_OPENED;
3244 files_struct *base_fsp = NULL;
3245 files_struct *fsp = NULL;
3246 NTSTATUS status;
3247
3248 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3249 "file_attributes = 0x%x, share_access = 0x%x, "
3250 "create_disposition = 0x%x create_options = 0x%x "
3251 "oplock_request = 0x%x private_flags = 0x%x "
3252 "ea_list = 0x%p, sd = 0x%p, "
3253 "fname = %s\n",
3254 (unsigned int)access_mask,
3255 (unsigned int)file_attributes,
3256 (unsigned int)share_access,
3257 (unsigned int)create_disposition,
3258 (unsigned int)create_options,
3259 (unsigned int)oplock_request,
3260 (unsigned int)private_flags,
3261 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3262
3263 if (create_options & FILE_OPEN_BY_FILE_ID) {
3264 status = NT_STATUS_NOT_SUPPORTED;
3265 goto fail;
3266 }
3267
3268 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3269 status = NT_STATUS_INVALID_PARAMETER;
3270 goto fail;
3271 }
3272
3273 if (req == NULL) {
3274 oplock_request |= INTERNAL_OPEN_ONLY;
3275 }
3276
3277 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3278 && (access_mask & DELETE_ACCESS)
3279 && !is_ntfs_stream_smb_fname(smb_fname)) {
3280 /*
3281 * We can't open a file with DELETE access if any of the
3282 * streams is open without FILE_SHARE_DELETE
3283 */
3284 status = open_streams_for_delete(conn, smb_fname->base_name);
3285
3286 if (!NT_STATUS_IS_OK(status)) {
3287 goto fail;
3288 }
3289 }
3290
3291 /* This is the correct thing to do (check every time) but can_delete
3292 * is expensive (it may have to read the parent directory
3293 * permissions). So for now we're not doing it unless we have a strong
3294 * hint the client is really going to delete this file. If the client
3295 * is forcing FILE_CREATE let the filesystem take care of the
3296 * permissions. */
3297
3298 /* Setting FILE_SHARE_DELETE is the hint. */
3299
3300 if ((create_disposition != FILE_CREATE)
3301 && (access_mask & DELETE_ACCESS)
3302 && (!(can_delete_file_in_directory(conn, smb_fname) ||
3303 can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
3304 status = NT_STATUS_ACCESS_DENIED;
3305 DEBUG(10,("create_file_unixpath: open file %s "
3306 "for delete ACCESS_DENIED\n",
3307 smb_fname_str_dbg(smb_fname)));
3308 goto fail;
3309 }
3310
3311 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3312 !security_token_has_privilege(get_current_nttok(conn),
3313 SEC_PRIV_SECURITY)) {
3314 DEBUG(10, ("create_file_unixpath: open on %s "
3315 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3316 smb_fname_str_dbg(smb_fname)));
3317 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3318 goto fail;
3319 }
3320
3321 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3322 && is_ntfs_stream_smb_fname(smb_fname)
3323 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3324 uint32 base_create_disposition;
3325 struct smb_filename *smb_fname_base = NULL;
3326
3327 if (create_options & FILE_DIRECTORY_FILE) {
3328 status = NT_STATUS_NOT_A_DIRECTORY;
3329 goto fail;
3330 }
3331
3332 switch (create_disposition) {
3333 case FILE_OPEN:
3334 base_create_disposition = FILE_OPEN;
3335 break;
3336 default:
3337 base_create_disposition = FILE_OPEN_IF;
3338 break;
3339 }
3340
3341 /* Create an smb_filename with stream_name == NULL. */
3342 status = create_synthetic_smb_fname(talloc_tos(),
3343 smb_fname->base_name,
3344 NULL, NULL,
3345 &smb_fname_base);
3346 if (!NT_STATUS_IS_OK(status)) {
3347 goto fail;
3348 }
3349
3350 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3351 DEBUG(10, ("Unable to stat stream: %s\n",
3352 smb_fname_str_dbg(smb_fname_base)));
3353 }
3354
3355 /* Open the base file. */
3356 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3357 FILE_SHARE_READ
3358 | FILE_SHARE_WRITE
3359 | FILE_SHARE_DELETE,
3360 base_create_disposition,
3361 0, 0, 0, 0, 0, NULL, NULL,
3362 &base_fsp, NULL);
3363 TALLOC_FREE(smb_fname_base);
3364
3365 if (!NT_STATUS_IS_OK(status)) {
3366 DEBUG(10, ("create_file_unixpath for base %s failed: "
3367 "%s\n", smb_fname->base_name,
3368 nt_errstr(status)));
3369 goto fail;
3370 }
3371 /* we don't need to low level fd */
3372 fd_close(base_fsp);
3373 }
3374
3375 /*
3376 * If it's a request for a directory open, deal with it separately.
3377 */
3378
3379 if (create_options & FILE_DIRECTORY_FILE) {
3380
3381 if (create_options & FILE_NON_DIRECTORY_FILE) {
3382 status = NT_STATUS_INVALID_PARAMETER;
3383 goto fail;
3384 }
3385
3386 /* Can't open a temp directory. IFS kit test. */
3387 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3388 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3389 status = NT_STATUS_INVALID_PARAMETER;
3390 goto fail;
3391 }
3392
3393 /*
3394 * We will get a create directory here if the Win32
3395 * app specified a security descriptor in the
3396 * CreateDirectory() call.
3397 */
3398
3399 oplock_request = 0;
3400 status = open_directory(
3401 conn, req, smb_fname, access_mask, share_access,
3402 create_disposition, create_options, file_attributes,
3403 &info, &fsp);
3404 } else {
3405
3406 /*
3407 * Ordinary file case.
3408 */
3409
3410 status = file_new(req, conn, &fsp);
3411 if(!NT_STATUS_IS_OK(status)) {
3412 goto fail;
3413 }
3414
3415 status = fsp_set_smb_fname(fsp, smb_fname);
3416 if (!NT_STATUS_IS_OK(status)) {
3417 goto fail;
3418 }
3419
3420 /*
3421 * We're opening the stream element of a base_fsp
3422 * we already opened. Set up the base_fsp pointer.
3423 */
3424 if (base_fsp) {
3425 fsp->base_fsp = base_fsp;
3426 }
3427
3428 status = open_file_ntcreate(conn,
3429 req,
3430 access_mask,
3431 share_access,
3432 create_disposition,
3433 create_options,
3434 file_attributes,
3435 oplock_request,
3436 private_flags,
3437 &info,
3438 fsp);
3439
3440 if(!NT_STATUS_IS_OK(status)) {
3441 file_free(req, fsp);
3442 fsp = NULL;
3443 }
3444
3445 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3446
3447 /* A stream open never opens a directory */
3448
3449 if (base_fsp) {
3450 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3451 goto fail;
3452 }
3453
3454 /*
3455 * Fail the open if it was explicitly a non-directory
3456 * file.
3457 */
3458
3459 if (create_options & FILE_NON_DIRECTORY_FILE) {
3460 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3461 goto fail;
3462 }
3463
3464 oplock_request = 0;
3465 status = open_directory(
3466 conn, req, smb_fname, access_mask,
3467 share_access, create_disposition,
3468 create_options, file_attributes,
3469 &info, &fsp);
3470 }
3471 }
3472
3473 if (!NT_STATUS_IS_OK(status)) {
3474 goto fail;
3475 }
3476
3477 fsp->base_fsp = base_fsp;
3478
3479 /*
3480 * According to the MS documentation, the only time the security
3481 * descriptor is applied to the opened file is iff we *created* the
3482 * file; an existing file stays the same.
3483 *
3484 * Also, it seems (from observation) that you can open the file with
3485 * any access mask but you can still write the sd. We need to override
3486 * the granted access before we call set_sd
3487 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3488 */
3489
3490 if ((sd != NULL) && (info == FILE_WAS_CREATED)
3491 && lp_nt_acl_support(SNUM(conn))) {
3492
3493 uint32_t sec_info_sent;
3494 uint32_t saved_access_mask = fsp->access_mask;
3495
3496 sec_info_sent = get_sec_info(sd);
3497
3498 fsp->access_mask = FILE_GENERIC_ALL;
3499
3500 /* Convert all the generic bits. */
3501 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3502 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3503
3504 if (sec_info_sent & (SECINFO_OWNER|
3505 SECINFO_GROUP|
3506 SECINFO_DACL|
3507 SECINFO_SACL)) {
3508 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3509 }
3510
3511 fsp->access_mask = saved_access_mask;
3512
3513 if (!NT_STATUS_IS_OK(status)) {
3514 goto fail;
3515 }
3516 }
3517
3518 if ((ea_list != NULL) &&
3519 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3520 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3521 if (!NT_STATUS_IS_OK(status)) {
3522 goto fail;
3523 }
3524 }
3525
3526 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3527 status = NT_STATUS_ACCESS_DENIED;
3528 goto fail;
3529 }
3530
3531 /* Save the requested allocation size. */
3532 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3533 if (allocation_size
3534 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3535 fsp->initial_allocation_size = smb_roundup(
3536 fsp->conn, allocation_size);
3537 if (fsp->is_directory) {
3538 /* Can't set allocation size on a directory. */
3539 status = NT_STATUS_ACCESS_DENIED;
3540 goto fail;
3541 }
3542 if (vfs_allocate_file_space(
3543 fsp, fsp->initial_allocation_size) == -1) {
3544 status = NT_STATUS_DISK_FULL;
3545 goto fail;
3546 }
3547 } else {
3548 fsp->initial_allocation_size = smb_roundup(
3549 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3550 }
3551 }
3552
3553 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3554
3555 *result = fsp;
3556 if (pinfo != NULL) {
3557 *pinfo = info;
3558 }
3559
3560 smb_fname->st = fsp->fsp_name->st;
3561
3562 return NT_STATUS_OK;
3563
3564 fail:
3565 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3566
3567 if (fsp != NULL) {
3568 if (base_fsp && fsp->base_fsp == base_fsp) {
3569 /*
3570 * The close_file below will close
3571 * fsp->base_fsp.
3572 */
3573 base_fsp = NULL;
3574 }
3575 close_file(req, fsp, ERROR_CLOSE);
3576 fsp = NULL;
3577 }
3578 if (base_fsp != NULL) {
3579 close_file(req, base_fsp, ERROR_CLOSE);
3580 base_fsp = NULL;
3581 }
3582 return status;
3583 }
3584
3585 /*
3586 * Calculate the full path name given a relative fid.
3587 */
3588 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3589 struct smb_request *req,
3590 uint16_t root_dir_fid,
3591 const struct smb_filename *smb_fname,
3592 struct smb_filename **smb_fname_out)
3593 {
3594 files_struct *dir_fsp;
3595 char *parent_fname = NULL;
3596 char *new_base_name = NULL;
3597 NTSTATUS status;
3598
3599 if (root_dir_fid == 0 || !smb_fname) {
3600 status = NT_STATUS_INTERNAL_ERROR;
3601 goto out;
3602 }
3603
3604 dir_fsp = file_fsp(req, root_dir_fid);
3605
3606 if (dir_fsp == NULL) {
3607 status = NT_STATUS_INVALID_HANDLE;
3608 goto out;
3609 }
3610
3611 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3612 status = NT_STATUS_INVALID_HANDLE;
3613 goto out;
3614 }
3615
3616 if (!dir_fsp->is_directory) {
3617
3618 /*
3619 * Check to see if this is a mac fork of some kind.
3620 */
3621
3622 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3623 is_ntfs_stream_smb_fname(smb_fname)) {
3624 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3625 goto out;
3626 }
3627
3628 /*
3629 we need to handle the case when we get a
3630 relative open relative to a file and the
3631 pathname is blank - this is a reopen!
3632 (hint from demyn plantenberg)
3633 */
3634
3635 status = NT_STATUS_INVALID_HANDLE;
3636 goto out;
3637 }
3638
3639 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3640 /*
3641 * We're at the toplevel dir, the final file name
3642 * must not contain ./, as this is filtered out
3643 * normally by srvstr_get_path and unix_convert
3644 * explicitly rejects paths containing ./.
3645 */
3646 parent_fname = talloc_strdup(talloc_tos(), "");
3647 if (parent_fname == NULL) {
3648 status = NT_STATUS_NO_MEMORY;
3649 goto out;
3650 }
3651 } else {
3652 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3653
3654 /*
3655 * Copy in the base directory name.
3656 */
3657
3658 parent_fname = talloc_array(talloc_tos(), char,
3659 dir_name_len+2);
3660 if (parent_fname == NULL) {
3661 status = NT_STATUS_NO_MEMORY;
3662 goto out;
3663 }
3664 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3665 dir_name_len+1);
3666
3667 /*
3668 * Ensure it ends in a '/'.
3669 * We used TALLOC_SIZE +2 to add space for the '/'.
3670 */
3671
3672 if(dir_name_len
3673 && (parent_fname[dir_name_len-1] != '\\')
3674 && (parent_fname[dir_name_len-1] != '/')) {
3675 parent_fname[dir_name_len] = '/';
3676 parent_fname[dir_name_len+1] = '\0';
3677 }
3678 }
3679
3680 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3681 smb_fname->base_name);
3682 if (new_base_name == NULL) {
3683 status = NT_STATUS_NO_MEMORY;
3684 goto out;
3685 }
3686
3687 status = filename_convert(req,
3688 conn,
3689 req->flags2 & FLAGS2_DFS_PATHNAMES,
3690 new_base_name,
3691 0,
3692 NULL,
3693 smb_fname_out);
3694 if (!NT_STATUS_IS_OK(status)) {
3695 goto out;
3696 }
3697
3698 out:
3699 TALLOC_FREE(parent_fname);
3700 TALLOC_FREE(new_base_name);
3701 return status;
3702 }
3703
3704 NTSTATUS create_file_default(connection_struct *conn,
3705 struct smb_request *req,
3706 uint16_t root_dir_fid,
3707 struct smb_filename *smb_fname,
3708 uint32_t access_mask,
3709 uint32_t share_access,
3710 uint32_t create_disposition,
3711 uint32_t create_options,
3712 uint32_t file_attributes,
3713 uint32_t oplock_request,
3714 uint64_t allocation_size,
3715 uint32_t private_flags,
3716 struct security_descriptor *sd,
3717 struct ea_list *ea_list,
3718 files_struct **result,
3719 int *pinfo)
3720 {
3721 int info = FILE_WAS_OPENED;
3722 files_struct *fsp = NULL;
3723 NTSTATUS status;
3724 bool stream_name = false;
3725
3726 DEBUG(10,("create_file: access_mask = 0x%x "
3727 "file_attributes = 0x%x, share_access = 0x%x, "
3728 "create_disposition = 0x%x create_options = 0x%x "
3729 "oplock_request = 0x%x "
3730 "private_flags = 0x%x "
3731 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3732 "fname = %s\n",
3733 (unsigned int)access_mask,
3734 (unsigned int)file_attributes,
3735 (unsigned int)share_access,
3736 (unsigned int)create_disposition,
3737 (unsigned int)create_options,
3738 (unsigned int)oplock_request,
3739 (unsigned int)private_flags,
3740 (unsigned int)root_dir_fid,
3741 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3742
3743 /*
3744 * Calculate the filename from the root_dir_if if necessary.
3745 */
3746
3747 if (root_dir_fid != 0) {
3748 struct smb_filename *smb_fname_out = NULL;
3749 status = get_relative_fid_filename(conn, req, root_dir_fid,
3750 smb_fname, &smb_fname_out);
3751 if (!NT_STATUS_IS_OK(status)) {
3752 goto fail;
3753 }
3754 smb_fname = smb_fname_out;
3755 }
3756
3757 /*
3758 * Check to see if this is a mac fork of some kind.
3759 */
3760
3761 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3762 if (stream_name) {
3763 enum FAKE_FILE_TYPE fake_file_type;
3764
3765 fake_file_type = is_fake_file(smb_fname);
3766
3767 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3768
3769 /*
3770 * Here we go! support for changing the disk quotas
3771 * --metze
3772 *
3773 * We need to fake up to open this MAGIC QUOTA file
3774 * and return a valid FID.
3775 *
3776 * w2k close this file directly after openening xp
3777 * also tries a QUERY_FILE_INFO on the file and then
3778 * close it
3779 */
3780 status = open_fake_file(req, conn, req->vuid,
3781 fake_file_type, smb_fname,
3782 access_mask, &fsp);
3783 if (!NT_STATUS_IS_OK(status)) {
3784 goto fail;
3785 }
3786
3787 ZERO_STRUCT(smb_fname->st);
3788 goto done;
3789 }
3790
3791 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3792 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3793 goto fail;
3794 }
3795 }
3796
3797 /* All file access must go through check_name() */
3798
3799 status = check_name(conn, smb_fname->base_name);
3800 if (!NT_STATUS_IS_OK(status)) {
3801 goto fail;
3802 }
3803
3804 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3805 int ret;
3806 smb_fname->stream_name = NULL;
3807 /* We have to handle this error here. */
3808 if (create_options & FILE_DIRECTORY_FILE) {
3809 status = NT_STATUS_NOT_A_DIRECTORY;
3810 goto fail;
3811 }
3812 if (lp_posix_pathnames()) {
3813 ret = SMB_VFS_LSTAT(conn, smb_fname);
3814 } else {
3815 ret = SMB_VFS_STAT(conn, smb_fname);
3816 }
3817
3818 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3819 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3820 goto fail;
3821 }
3822 }
3823
3824 status = create_file_unixpath(
3825 conn, req, smb_fname, access_mask, share_access,
3826 create_disposition, create_options, file_attributes,
3827 oplock_request, allocation_size, private_flags,
3828 sd, ea_list,
3829 &fsp, &info);
3830
3831 if (!NT_STATUS_IS_OK(status)) {
3832 goto fail;
3833 }
3834
3835 done:
3836 DEBUG(10, ("create_file: info=%d\n", info));
3837
3838 *result = fsp;
3839 if (pinfo != NULL) {
3840 *pinfo = info;
3841 }
3842 return NT_STATUS_OK;
3843
3844 fail:
3845 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3846
3847 if (fsp != NULL) {
3848 close_file(req, fsp, ERROR_CLOSE);
3849 fsp = NULL;
3850 }
3851 return status;
3852 }
reg import