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s3:smbd: add smbXsrv_session infrastructure
[Samba/gebeck_regimport.git] / source3 / smbd / open.c
blobf259cc99ec07575a380debb7b3a42f9906838a38
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 "../librpc/gen_ndr/open_files.h"
31 #include "auth.h"
32 #include "messages.h"
33
34 extern const struct generic_mapping file_generic_mapping;
35
36 struct deferred_open_record {
37 bool delayed_for_oplocks;
38 struct file_id id;
39 };
40
41 /****************************************************************************
42 If the requester wanted DELETE_ACCESS and was rejected because
43 the file ACL didn't include DELETE_ACCESS, see if the parent ACL
44 overrides this.
45 ****************************************************************************/
46
47 static bool parent_override_delete(connection_struct *conn,
48 const struct smb_filename *smb_fname,
49 uint32_t access_mask,
50 uint32_t rejected_mask)
51 {
52 if ((access_mask & DELETE_ACCESS) &&
53 (rejected_mask & DELETE_ACCESS) &&
54 can_delete_file_in_directory(conn, smb_fname)) {
55 return true;
56 }
57 return false;
58 }
59
60 /****************************************************************************
61 Check if we have open rights.
62 ****************************************************************************/
63
64 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
65 const struct smb_filename *smb_fname,
66 uint32_t access_mask)
67 {
68 /* Check if we have rights to open. */
69 NTSTATUS status;
70 struct security_descriptor *sd = NULL;
71 uint32_t rejected_share_access;
72 uint32_t rejected_mask = access_mask;
73
74 rejected_share_access = access_mask & ~(conn->share_access);
75
76 if (rejected_share_access) {
77 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
78 "on %s (0x%x)\n",
79 (unsigned int)access_mask,
80 smb_fname_str_dbg(smb_fname),
81 (unsigned int)rejected_share_access ));
82 return NT_STATUS_ACCESS_DENIED;
83 }
84
85 if (get_current_uid(conn) == (uid_t)0) {
86 /* I'm sorry sir, I didn't know you were root... */
87 DEBUG(10,("smbd_check_access_rights: root override "
88 "on %s. Granting 0x%x\n",
89 smb_fname_str_dbg(smb_fname),
90 (unsigned int)access_mask ));
91 return NT_STATUS_OK;
92 }
93
94 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
95 DEBUG(10,("smbd_check_access_rights: not checking ACL "
96 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
97 smb_fname_str_dbg(smb_fname),
98 (unsigned int)access_mask ));
99 return NT_STATUS_OK;
100 }
101
102 if (access_mask == DELETE_ACCESS &&
103 VALID_STAT(smb_fname->st) &&
104 S_ISLNK(smb_fname->st.st_ex_mode)) {
105 /* We can always delete a symlink. */
106 DEBUG(10,("smbd_check_access_rights: not checking ACL "
107 "on DELETE_ACCESS on symlink %s.\n",
108 smb_fname_str_dbg(smb_fname) ));
109 return NT_STATUS_OK;
110 }
111
112 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
113 (SECINFO_OWNER |
114 SECINFO_GROUP |
115 SECINFO_DACL),&sd);
116
117 if (!NT_STATUS_IS_OK(status)) {
118 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
119 "on %s: %s\n",
120 smb_fname_str_dbg(smb_fname),
121 nt_errstr(status)));
122
123 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
124 goto access_denied;
125 }
126
127 return status;
128 }
129
130 /*
131 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
132 * owner WRITE_DAC and READ_CONTROL.
133 */
134 status = se_access_check(sd,
135 get_current_nttok(conn),
136 (access_mask & ~FILE_READ_ATTRIBUTES),
137 &rejected_mask);
138
139 DEBUG(10,("smbd_check_access_rights: file %s requesting "
140 "0x%x returning 0x%x (%s)\n",
141 smb_fname_str_dbg(smb_fname),
142 (unsigned int)access_mask,
143 (unsigned int)rejected_mask,
144 nt_errstr(status) ));
145
146 if (!NT_STATUS_IS_OK(status)) {
147 if (DEBUGLEVEL >= 10) {
148 DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
149 smb_fname_str_dbg(smb_fname) ));
150 NDR_PRINT_DEBUG(security_descriptor, sd);
151 }
152 }
153
154 TALLOC_FREE(sd);
155
156 if (NT_STATUS_IS_OK(status) ||
157 !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
158 return status;
159 }
160
161 /* Here we know status == NT_STATUS_ACCESS_DENIED. */
162
163 access_denied:
164
165 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
166 (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
167 !lp_store_dos_attributes(SNUM(conn)) &&
168 (lp_map_readonly(SNUM(conn)) ||
169 lp_map_archive(SNUM(conn)) ||
170 lp_map_hidden(SNUM(conn)) ||
171 lp_map_system(SNUM(conn)))) {
172 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
173
174 DEBUG(10,("smbd_check_access_rights: "
175 "overrode "
176 "FILE_WRITE_ATTRIBUTES "
177 "on file %s\n",
178 smb_fname_str_dbg(smb_fname)));
179 }
180
181 if (parent_override_delete(conn,
182 smb_fname,
183 access_mask,
184 rejected_mask)) {
185 /* Were we trying to do an open
186 * for delete and didn't get DELETE
187 * access (only) ? Check if the
188 * directory allows DELETE_CHILD.
189 * See here:
190 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
191 * for details. */
192
193 rejected_mask &= ~DELETE_ACCESS;
194
195 DEBUG(10,("smbd_check_access_rights: "
196 "overrode "
197 "DELETE_ACCESS on "
198 "file %s\n",
199 smb_fname_str_dbg(smb_fname)));
200 }
201
202 if (rejected_mask != 0) {
203 return NT_STATUS_ACCESS_DENIED;
204 }
205 return NT_STATUS_OK;
206 }
207
208 static NTSTATUS check_parent_access(struct connection_struct *conn,
209 struct smb_filename *smb_fname,
210 uint32_t access_mask)
211 {
212 NTSTATUS status;
213 char *parent_dir = NULL;
214 struct security_descriptor *parent_sd = NULL;
215 uint32_t access_granted = 0;
216
217 if (!parent_dirname(talloc_tos(),
218 smb_fname->base_name,
219 &parent_dir,
220 NULL)) {
221 return NT_STATUS_NO_MEMORY;
222 }
223
224 if (get_current_uid(conn) == (uid_t)0) {
225 /* I'm sorry sir, I didn't know you were root... */
226 DEBUG(10,("check_parent_access: root override "
227 "on %s. Granting 0x%x\n",
228 smb_fname_str_dbg(smb_fname),
229 (unsigned int)access_mask ));
230 return NT_STATUS_OK;
231 }
232
233 status = SMB_VFS_GET_NT_ACL(conn,
234 parent_dir,
235 SECINFO_DACL,
236 &parent_sd);
237
238 if (!NT_STATUS_IS_OK(status)) {
239 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
240 "%s with error %s\n",
241 parent_dir,
242 nt_errstr(status)));
243 return status;
244 }
245
246 /*
247 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
248 * owner WRITE_DAC and READ_CONTROL.
249 */
250 status = se_access_check(parent_sd,
251 get_current_nttok(conn),
252 (access_mask & ~FILE_READ_ATTRIBUTES),
253 &access_granted);
254 if(!NT_STATUS_IS_OK(status)) {
255 DEBUG(5,("check_parent_access: access check "
256 "on directory %s for "
257 "path %s for mask 0x%x returned (0x%x) %s\n",
258 parent_dir,
259 smb_fname->base_name,
260 access_mask,
261 access_granted,
262 nt_errstr(status) ));
263 return status;
264 }
265
266 return NT_STATUS_OK;
267 }
268
269 /****************************************************************************
270 fd support routines - attempt to do a dos_open.
271 ****************************************************************************/
272
273 static NTSTATUS fd_open(struct connection_struct *conn,
274 files_struct *fsp,
275 int flags,
276 mode_t mode)
277 {
278 struct smb_filename *smb_fname = fsp->fsp_name;
279 NTSTATUS status = NT_STATUS_OK;
280
281 #ifdef O_NOFOLLOW
282 /*
283 * Never follow symlinks on a POSIX client. The
284 * client should be doing this.
285 */
286
287 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
288 flags |= O_NOFOLLOW;
289 }
290 #endif
291
292 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
293 if (fsp->fh->fd == -1) {
294 int posix_errno = errno;
295 #ifdef O_NOFOLLOW
296 #if defined(ENOTSUP) && defined(OSF1)
297 /* handle special Tru64 errno */
298 if (errno == ENOTSUP) {
299 posix_errno = ELOOP;
300 }
301 #endif /* ENOTSUP */
302 #ifdef EFTYPE
303 /* fix broken NetBSD errno */
304 if (errno == EFTYPE) {
305 posix_errno = ELOOP;
306 }
307 #endif /* EFTYPE */
308 /* fix broken FreeBSD errno */
309 if (errno == EMLINK) {
310 posix_errno = ELOOP;
311 }
312 #endif /* O_NOFOLLOW */
313 status = map_nt_error_from_unix(posix_errno);
314 if (errno == EMFILE) {
315 static time_t last_warned = 0L;
316
317 if (time((time_t *) NULL) > last_warned) {
318 DEBUG(0,("Too many open files, unable "
319 "to open more! smbd's max "
320 "open files = %d\n",
321 lp_max_open_files()));
322 last_warned = time((time_t *) NULL);
323 }
324 }
325
326 }
327
328 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
329 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
330 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
331
332 return status;
333 }
334
335 /****************************************************************************
336 Close the file associated with a fsp.
337 ****************************************************************************/
338
339 NTSTATUS fd_close(files_struct *fsp)
340 {
341 int ret;
342
343 if (fsp->dptr) {
344 dptr_CloseDir(fsp);
345 }
346 if (fsp->fh->fd == -1) {
347 return NT_STATUS_OK; /* What we used to call a stat open. */
348 }
349 if (fsp->fh->ref_count > 1) {
350 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
351 }
352
353 ret = SMB_VFS_CLOSE(fsp);
354 fsp->fh->fd = -1;
355 if (ret == -1) {
356 return map_nt_error_from_unix(errno);
357 }
358 return NT_STATUS_OK;
359 }
360
361 /****************************************************************************
362 Change the ownership of a file to that of the parent directory.
363 Do this by fd if possible.
364 ****************************************************************************/
365
366 void change_file_owner_to_parent(connection_struct *conn,
367 const char *inherit_from_dir,
368 files_struct *fsp)
369 {
370 struct smb_filename *smb_fname_parent = NULL;
371 NTSTATUS status;
372 int ret;
373
374 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
375 NULL, NULL, &smb_fname_parent);
376 if (!NT_STATUS_IS_OK(status)) {
377 return;
378 }
379
380 ret = SMB_VFS_STAT(conn, smb_fname_parent);
381 if (ret == -1) {
382 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
383 "directory %s. Error was %s\n",
384 smb_fname_str_dbg(smb_fname_parent),
385 strerror(errno)));
386 TALLOC_FREE(smb_fname_parent);
387 return;
388 }
389
390 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
391 /* Already this uid - no need to change. */
392 DEBUG(10,("change_file_owner_to_parent: file %s "
393 "is already owned by uid %d\n",
394 fsp_str_dbg(fsp),
395 (int)fsp->fsp_name->st.st_ex_uid ));
396 TALLOC_FREE(smb_fname_parent);
397 return;
398 }
399
400 become_root();
401 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
402 unbecome_root();
403 if (ret == -1) {
404 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
405 "file %s to parent directory uid %u. Error "
406 "was %s\n", fsp_str_dbg(fsp),
407 (unsigned int)smb_fname_parent->st.st_ex_uid,
408 strerror(errno) ));
409 } else {
410 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
411 "parent directory uid %u.\n", fsp_str_dbg(fsp),
412 (unsigned int)smb_fname_parent->st.st_ex_uid));
413 /* Ensure the uid entry is updated. */
414 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
415 }
416
417 TALLOC_FREE(smb_fname_parent);
418 }
419
420 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
421 const char *inherit_from_dir,
422 const char *fname,
423 SMB_STRUCT_STAT *psbuf)
424 {
425 struct smb_filename *smb_fname_parent = NULL;
426 struct smb_filename *smb_fname_cwd = NULL;
427 char *saved_dir = NULL;
428 TALLOC_CTX *ctx = talloc_tos();
429 NTSTATUS status = NT_STATUS_OK;
430 int ret;
431
432 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
433 &smb_fname_parent);
434 if (!NT_STATUS_IS_OK(status)) {
435 return status;
436 }
437
438 ret = SMB_VFS_STAT(conn, smb_fname_parent);
439 if (ret == -1) {
440 status = map_nt_error_from_unix(errno);
441 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
442 "directory %s. Error was %s\n",
443 smb_fname_str_dbg(smb_fname_parent),
444 strerror(errno)));
445 goto out;
446 }
447
448 /* We've already done an lstat into psbuf, and we know it's a
449 directory. If we can cd into the directory and the dev/ino
450 are the same then we can safely chown without races as
451 we're locking the directory in place by being in it. This
452 should work on any UNIX (thanks tridge :-). JRA.
453 */
454
455 saved_dir = vfs_GetWd(ctx,conn);
456 if (!saved_dir) {
457 status = map_nt_error_from_unix(errno);
458 DEBUG(0,("change_dir_owner_to_parent: failed to get "
459 "current working directory. Error was %s\n",
460 strerror(errno)));
461 goto out;
462 }
463
464 /* Chdir into the new path. */
465 if (vfs_ChDir(conn, fname) == -1) {
466 status = map_nt_error_from_unix(errno);
467 DEBUG(0,("change_dir_owner_to_parent: failed to change "
468 "current working directory to %s. Error "
469 "was %s\n", fname, strerror(errno) ));
470 goto chdir;
471 }
472
473 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
474 &smb_fname_cwd);
475 if (!NT_STATUS_IS_OK(status)) {
476 return status;
477 }
478
479 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
480 if (ret == -1) {
481 status = map_nt_error_from_unix(errno);
482 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
483 "directory '.' (%s) Error was %s\n",
484 fname, strerror(errno)));
485 goto chdir;
486 }
487
488 /* Ensure we're pointing at the same place. */
489 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
490 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
491 DEBUG(0,("change_dir_owner_to_parent: "
492 "device/inode on directory %s changed. "
493 "Refusing to chown !\n", fname ));
494 status = NT_STATUS_ACCESS_DENIED;
495 goto chdir;
496 }
497
498 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
499 /* Already this uid - no need to change. */
500 DEBUG(10,("change_dir_owner_to_parent: directory %s "
501 "is already owned by uid %d\n",
502 fname,
503 (int)smb_fname_cwd->st.st_ex_uid ));
504 status = NT_STATUS_OK;
505 goto chdir;
506 }
507
508 become_root();
509 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
510 (gid_t)-1);
511 unbecome_root();
512 if (ret == -1) {
513 status = map_nt_error_from_unix(errno);
514 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
515 "directory %s to parent directory uid %u. "
516 "Error was %s\n", fname,
517 (unsigned int)smb_fname_parent->st.st_ex_uid,
518 strerror(errno) ));
519 } else {
520 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
521 "directory %s to parent directory uid %u.\n",
522 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
523 /* Ensure the uid entry is updated. */
524 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
525 }
526
527 chdir:
528 vfs_ChDir(conn,saved_dir);
529 out:
530 TALLOC_FREE(smb_fname_parent);
531 TALLOC_FREE(smb_fname_cwd);
532 return status;
533 }
534
535 /****************************************************************************
536 Open a file.
537 ****************************************************************************/
538
539 static NTSTATUS open_file(files_struct *fsp,
540 connection_struct *conn,
541 struct smb_request *req,
542 const char *parent_dir,
543 int flags,
544 mode_t unx_mode,
545 uint32 access_mask, /* client requested access mask. */
546 uint32 open_access_mask) /* what we're actually using in the open. */
547 {
548 struct smb_filename *smb_fname = fsp->fsp_name;
549 NTSTATUS status = NT_STATUS_OK;
550 int accmode = (flags & O_ACCMODE);
551 int local_flags = flags;
552 bool file_existed = VALID_STAT(fsp->fsp_name->st);
553 bool file_created = false;
554
555 fsp->fh->fd = -1;
556 errno = EPERM;
557
558 /* Check permissions */
559
560 /*
561 * This code was changed after seeing a client open request
562 * containing the open mode of (DENY_WRITE/read-only) with
563 * the 'create if not exist' bit set. The previous code
564 * would fail to open the file read only on a read-only share
565 * as it was checking the flags parameter directly against O_RDONLY,
566 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
567 * JRA.
568 */
569
570 if (!CAN_WRITE(conn)) {
571 /* It's a read-only share - fail if we wanted to write. */
572 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
573 DEBUG(3,("Permission denied opening %s\n",
574 smb_fname_str_dbg(smb_fname)));
575 return NT_STATUS_ACCESS_DENIED;
576 } else if(flags & O_CREAT) {
577 /* We don't want to write - but we must make sure that
578 O_CREAT doesn't create the file if we have write
579 access into the directory.
580 */
581 flags &= ~(O_CREAT|O_EXCL);
582 local_flags &= ~(O_CREAT|O_EXCL);
583 }
584 }
585
586 /*
587 * This little piece of insanity is inspired by the
588 * fact that an NT client can open a file for O_RDONLY,
589 * but set the create disposition to FILE_EXISTS_TRUNCATE.
590 * If the client *can* write to the file, then it expects to
591 * truncate the file, even though it is opening for readonly.
592 * Quicken uses this stupid trick in backup file creation...
593 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
594 * for helping track this one down. It didn't bite us in 2.0.x
595 * as we always opened files read-write in that release. JRA.
596 */
597
598 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
599 DEBUG(10,("open_file: truncate requested on read-only open "
600 "for file %s\n", smb_fname_str_dbg(smb_fname)));
601 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
602 }
603
604 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
605 (!file_existed && (local_flags & O_CREAT)) ||
606 ((local_flags & O_TRUNC) == O_TRUNC) ) {
607 const char *wild;
608
609 /*
610 * We can't actually truncate here as the file may be locked.
611 * open_file_ntcreate will take care of the truncate later. JRA.
612 */
613
614 local_flags &= ~O_TRUNC;
615
616 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
617 /*
618 * We would block on opening a FIFO with no one else on the
619 * other end. Do what we used to do and add O_NONBLOCK to the
620 * open flags. JRA.
621 */
622
623 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
624 local_flags |= O_NONBLOCK;
625 }
626 #endif
627
628 /* Don't create files with Microsoft wildcard characters. */
629 if (fsp->base_fsp) {
630 /*
631 * wildcard characters are allowed in stream names
632 * only test the basefilename
633 */
634 wild = fsp->base_fsp->fsp_name->base_name;
635 } else {
636 wild = smb_fname->base_name;
637 }
638 if ((local_flags & O_CREAT) && !file_existed &&
639 ms_has_wild(wild)) {
640 return NT_STATUS_OBJECT_NAME_INVALID;
641 }
642
643 /* Can we access this file ? */
644 if (!fsp->base_fsp) {
645 /* Only do this check on non-stream open. */
646 if (file_existed) {
647 status = smbd_check_access_rights(conn,
648 smb_fname,
649 access_mask);
650 } else if (local_flags & O_CREAT){
651 status = check_parent_access(conn,
652 smb_fname,
653 SEC_DIR_ADD_FILE);
654 } else {
655 /* File didn't exist and no O_CREAT. */
656 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
657 }
658 if (!NT_STATUS_IS_OK(status)) {
659 DEBUG(10,("open_file: "
660 "%s on file "
661 "%s returned %s\n",
662 file_existed ?
663 "smbd_check_access_rights" :
664 "check_parent_access",
665 smb_fname_str_dbg(smb_fname),
666 nt_errstr(status) ));
667 return status;
668 }
669 }
670
671 /* Actually do the open */
672 status = fd_open(conn, fsp, local_flags, unx_mode);
673 if (!NT_STATUS_IS_OK(status)) {
674 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
675 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
676 nt_errstr(status),local_flags,flags));
677 return status;
678 }
679
680 if ((local_flags & O_CREAT) && !file_existed) {
681 file_created = true;
682 }
683
684 } else {
685 fsp->fh->fd = -1; /* What we used to call a stat open. */
686 if (!file_existed) {
687 /* File must exist for a stat open. */
688 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
689 }
690
691 status = smbd_check_access_rights(conn,
692 smb_fname,
693 access_mask);
694
695 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
696 fsp->posix_open &&
697 S_ISLNK(smb_fname->st.st_ex_mode)) {
698 /* This is a POSIX stat open for delete
699 * or rename on a symlink that points
700 * nowhere. Allow. */
701 DEBUG(10,("open_file: allowing POSIX "
702 "open on bad symlink %s\n",
703 smb_fname_str_dbg(smb_fname)));
704 status = NT_STATUS_OK;
705 }
706
707 if (!NT_STATUS_IS_OK(status)) {
708 DEBUG(10,("open_file: "
709 "smbd_check_access_rights on file "
710 "%s returned %s\n",
711 smb_fname_str_dbg(smb_fname),
712 nt_errstr(status) ));
713 return status;
714 }
715 }
716
717 if (!file_existed) {
718 int ret;
719
720 if (fsp->fh->fd == -1) {
721 ret = SMB_VFS_STAT(conn, smb_fname);
722 } else {
723 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
724 /* If we have an fd, this stat should succeed. */
725 if (ret == -1) {
726 DEBUG(0,("Error doing fstat on open file %s "
727 "(%s)\n",
728 smb_fname_str_dbg(smb_fname),
729 strerror(errno) ));
730 }
731 }
732
733 /* For a non-io open, this stat failing means file not found. JRA */
734 if (ret == -1) {
735 status = map_nt_error_from_unix(errno);
736 fd_close(fsp);
737 return status;
738 }
739
740 if (file_created) {
741 bool need_re_stat = false;
742 /* Do all inheritance work after we've
743 done a successful stat call and filled
744 in the stat struct in fsp->fsp_name. */
745
746 /* Inherit the ACL if required */
747 if (lp_inherit_perms(SNUM(conn))) {
748 inherit_access_posix_acl(conn, parent_dir,
749 smb_fname->base_name,
750 unx_mode);
751 need_re_stat = true;
752 }
753
754 /* Change the owner if required. */
755 if (lp_inherit_owner(SNUM(conn))) {
756 change_file_owner_to_parent(conn, parent_dir,
757 fsp);
758 need_re_stat = true;
759 }
760
761 if (need_re_stat) {
762 if (fsp->fh->fd == -1) {
763 ret = SMB_VFS_STAT(conn, smb_fname);
764 } else {
765 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
766 /* If we have an fd, this stat should succeed. */
767 if (ret == -1) {
768 DEBUG(0,("Error doing fstat on open file %s "
769 "(%s)\n",
770 smb_fname_str_dbg(smb_fname),
771 strerror(errno) ));
772 }
773 }
774 }
775
776 notify_fname(conn, NOTIFY_ACTION_ADDED,
777 FILE_NOTIFY_CHANGE_FILE_NAME,
778 smb_fname->base_name);
779 }
780 }
781
782 /*
783 * POSIX allows read-only opens of directories. We don't
784 * want to do this (we use a different code path for this)
785 * so catch a directory open and return an EISDIR. JRA.
786 */
787
788 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
789 fd_close(fsp);
790 errno = EISDIR;
791 return NT_STATUS_FILE_IS_A_DIRECTORY;
792 }
793
794 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
795 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
796 fsp->file_pid = req ? req->smbpid : 0;
797 fsp->can_lock = True;
798 fsp->can_read = ((access_mask & FILE_READ_DATA) != 0);
799 fsp->can_write =
800 CAN_WRITE(conn) &&
801 ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0);
802 fsp->print_file = NULL;
803 fsp->modified = False;
804 fsp->sent_oplock_break = NO_BREAK_SENT;
805 fsp->is_directory = False;
806 if (conn->aio_write_behind_list &&
807 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
808 conn->case_sensitive)) {
809 fsp->aio_write_behind = True;
810 }
811
812 fsp->wcp = NULL; /* Write cache pointer. */
813
814 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
815 conn->session_info->unix_info->unix_name,
816 smb_fname_str_dbg(smb_fname),
817 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
818 conn->num_files_open));
819
820 errno = 0;
821 return NT_STATUS_OK;
822 }
823
824 /****************************************************************************
825 Check if we can open a file with a share mode.
826 Returns True if conflict, False if not.
827 ****************************************************************************/
828
829 static bool share_conflict(struct share_mode_entry *entry,
830 uint32 access_mask,
831 uint32 share_access)
832 {
833 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
834 "entry->share_access = 0x%x, "
835 "entry->private_options = 0x%x\n",
836 (unsigned int)entry->access_mask,
837 (unsigned int)entry->share_access,
838 (unsigned int)entry->private_options));
839
840 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
841 (unsigned int)access_mask, (unsigned int)share_access));
842
843 if ((entry->access_mask & (FILE_WRITE_DATA|
844 FILE_APPEND_DATA|
845 FILE_READ_DATA|
846 FILE_EXECUTE|
847 DELETE_ACCESS)) == 0) {
848 DEBUG(10,("share_conflict: No conflict due to "
849 "entry->access_mask = 0x%x\n",
850 (unsigned int)entry->access_mask ));
851 return False;
852 }
853
854 if ((access_mask & (FILE_WRITE_DATA|
855 FILE_APPEND_DATA|
856 FILE_READ_DATA|
857 FILE_EXECUTE|
858 DELETE_ACCESS)) == 0) {
859 DEBUG(10,("share_conflict: No conflict due to "
860 "access_mask = 0x%x\n",
861 (unsigned int)access_mask ));
862 return False;
863 }
864
865 #if 1 /* JRA TEST - Superdebug. */
866 #define CHECK_MASK(num, am, right, sa, share) \
867 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
868 (unsigned int)(num), (unsigned int)(am), \
869 (unsigned int)(right), (unsigned int)(am)&(right) )); \
870 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
871 (unsigned int)(num), (unsigned int)(sa), \
872 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
873 if (((am) & (right)) && !((sa) & (share))) { \
874 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
875 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
876 (unsigned int)(share) )); \
877 return True; \
878 }
879 #else
880 #define CHECK_MASK(num, am, right, sa, share) \
881 if (((am) & (right)) && !((sa) & (share))) { \
882 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
883 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
884 (unsigned int)(share) )); \
885 return True; \
886 }
887 #endif
888
889 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
890 share_access, FILE_SHARE_WRITE);
891 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
892 entry->share_access, FILE_SHARE_WRITE);
893
894 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
895 share_access, FILE_SHARE_READ);
896 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
897 entry->share_access, FILE_SHARE_READ);
898
899 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
900 share_access, FILE_SHARE_DELETE);
901 CHECK_MASK(6, access_mask, DELETE_ACCESS,
902 entry->share_access, FILE_SHARE_DELETE);
903
904 DEBUG(10,("share_conflict: No conflict.\n"));
905 return False;
906 }
907
908 #if defined(DEVELOPER)
909 static void validate_my_share_entries(struct smbd_server_connection *sconn,
910 int num,
911 struct share_mode_entry *share_entry)
912 {
913 struct server_id self = messaging_server_id(sconn->msg_ctx);
914 files_struct *fsp;
915
916 if (!serverid_equal(&self, &share_entry->pid)) {
917 return;
918 }
919
920 if (is_deferred_open_entry(share_entry) &&
921 !open_was_deferred(sconn, share_entry->op_mid)) {
922 char *str = talloc_asprintf(talloc_tos(),
923 "Got a deferred entry without a request: "
924 "PANIC: %s\n",
925 share_mode_str(talloc_tos(), num, share_entry));
926 smb_panic(str);
927 }
928
929 if (!is_valid_share_mode_entry(share_entry)) {
930 return;
931 }
932
933 fsp = file_find_dif(sconn, share_entry->id,
934 share_entry->share_file_id);
935 if (!fsp) {
936 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
937 share_mode_str(talloc_tos(), num, share_entry) ));
938 smb_panic("validate_my_share_entries: Cannot match a "
939 "share entry with an open file\n");
940 }
941
942 if (is_deferred_open_entry(share_entry)) {
943 goto panic;
944 }
945
946 if ((share_entry->op_type == NO_OPLOCK) &&
947 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
948 /* Someone has already written to it, but I haven't yet
949 * noticed */
950 return;
951 }
952
953 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
954 goto panic;
955 }
956
957 return;
958
959 panic:
960 {
961 char *str;
962 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
963 share_mode_str(talloc_tos(), num, share_entry) ));
964 str = talloc_asprintf(talloc_tos(),
965 "validate_my_share_entries: "
966 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
967 fsp->fsp_name->base_name,
968 (unsigned int)fsp->oplock_type,
969 (unsigned int)share_entry->op_type );
970 smb_panic(str);
971 }
972 }
973 #endif
974
975 bool is_stat_open(uint32 access_mask)
976 {
977 return (access_mask &&
978 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
979 FILE_WRITE_ATTRIBUTES))==0) &&
980 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
981 FILE_WRITE_ATTRIBUTES)) != 0));
982 }
983
984 /****************************************************************************
985 Deal with share modes
986 Invarient: Share mode must be locked on entry and exit.
987 Returns -1 on error, or number of share modes on success (may be zero).
988 ****************************************************************************/
989
990 static NTSTATUS open_mode_check(connection_struct *conn,
991 struct share_mode_lock *lck,
992 uint32_t name_hash,
993 uint32 access_mask,
994 uint32 share_access,
995 uint32 create_options,
996 bool *file_existed)
997 {
998 int i;
999
1000 if(lck->data->num_share_modes == 0) {
1001 return NT_STATUS_OK;
1002 }
1003
1004 /* A delete on close prohibits everything */
1005
1006 if (is_delete_on_close_set(lck, name_hash)) {
1007 /*
1008 * Check the delete on close token
1009 * is valid. It could have been left
1010 * after a server crash.
1011 */
1012 for(i = 0; i < lck->data->num_share_modes; i++) {
1013 if (!share_mode_stale_pid(lck->data, i)) {
1014
1015 *file_existed = true;
1016
1017 return NT_STATUS_DELETE_PENDING;
1018 }
1019 }
1020 return NT_STATUS_OK;
1021 }
1022
1023 if (is_stat_open(access_mask)) {
1024 /* Stat open that doesn't trigger oplock breaks or share mode
1025 * checks... ! JRA. */
1026 return NT_STATUS_OK;
1027 }
1028
1029 /*
1030 * Check if the share modes will give us access.
1031 */
1032
1033 #if defined(DEVELOPER)
1034 for(i = 0; i < lck->data->num_share_modes; i++) {
1035 validate_my_share_entries(conn->sconn, i,
1036 &lck->data->share_modes[i]);
1037 }
1038 #endif
1039
1040 if (!lp_share_modes(SNUM(conn))) {
1041 return NT_STATUS_OK;
1042 }
1043
1044 /* Now we check the share modes, after any oplock breaks. */
1045 for(i = 0; i < lck->data->num_share_modes; i++) {
1046
1047 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1048 continue;
1049 }
1050
1051 /* someone else has a share lock on it, check to see if we can
1052 * too */
1053 if (share_conflict(&lck->data->share_modes[i],
1054 access_mask, share_access)) {
1055
1056 if (share_mode_stale_pid(lck->data, i)) {
1057 continue;
1058 }
1059
1060 *file_existed = true;
1061
1062 return NT_STATUS_SHARING_VIOLATION;
1063 }
1064 }
1065
1066 if (lck->data->num_share_modes != 0) {
1067 *file_existed = true;
1068 }
1069
1070 return NT_STATUS_OK;
1071 }
1072
1073 static bool is_delete_request(files_struct *fsp) {
1074 return ((fsp->access_mask == DELETE_ACCESS) &&
1075 (fsp->oplock_type == NO_OPLOCK));
1076 }
1077
1078 /*
1079 * Send a break message to the oplock holder and delay the open for
1080 * our client.
1081 */
1082
1083 static NTSTATUS send_break_message(files_struct *fsp,
1084 struct share_mode_entry *exclusive,
1085 uint64_t mid,
1086 int oplock_request)
1087 {
1088 NTSTATUS status;
1089 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1090
1091 DEBUG(10, ("Sending break request to PID %s\n",
1092 procid_str_static(&exclusive->pid)));
1093 exclusive->op_mid = mid;
1094
1095 /* Create the message. */
1096 share_mode_entry_to_message(msg, exclusive);
1097
1098 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1099 don't want this set in the share mode struct pointed to by lck. */
1100
1101 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1102 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1103 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1104 }
1105
1106 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1107 MSG_SMB_BREAK_REQUEST,
1108 (uint8 *)msg,
1109 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1110 if (!NT_STATUS_IS_OK(status)) {
1111 DEBUG(3, ("Could not send oplock break message: %s\n",
1112 nt_errstr(status)));
1113 }
1114
1115 return status;
1116 }
1117
1118 /*
1119 * Return share_mode_entry pointers for :
1120 * 1). Batch oplock entry.
1121 * 2). Batch or exclusive oplock entry (may be identical to #1).
1122 * bool have_level2_oplock
1123 * bool have_no_oplock.
1124 * Do internal consistency checks on the share mode for a file.
1125 */
1126
1127 static void find_oplock_types(files_struct *fsp,
1128 int oplock_request,
1129 const struct share_mode_lock *lck,
1130 struct share_mode_entry **pp_batch,
1131 struct share_mode_entry **pp_ex_or_batch,
1132 bool *got_level2,
1133 bool *got_no_oplock)
1134 {
1135 int i;
1136
1137 *pp_batch = NULL;
1138 *pp_ex_or_batch = NULL;
1139 *got_level2 = false;
1140 *got_no_oplock = false;
1141
1142 /* Ignore stat or internal opens, as is done in
1143 delay_for_batch_oplocks() and
1144 delay_for_exclusive_oplocks().
1145 */
1146 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1147 return;
1148 }
1149
1150 for (i=0; i<lck->data->num_share_modes; i++) {
1151 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1152 continue;
1153 }
1154
1155 if (lck->data->share_modes[i].op_type == NO_OPLOCK &&
1156 is_stat_open(lck->data->share_modes[i].access_mask)) {
1157 /* We ignore stat opens in the table - they
1158 always have NO_OPLOCK and never get or
1159 cause breaks. JRA. */
1160 continue;
1161 }
1162
1163 if (BATCH_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1164 /* batch - can only be one. */
1165 if (share_mode_stale_pid(lck->data, i)) {
1166 DEBUG(10, ("Found stale batch oplock\n"));
1167 continue;
1168 }
1169 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1170 smb_panic("Bad batch oplock entry.");
1171 }
1172 *pp_batch = &lck->data->share_modes[i];
1173 }
1174
1175 if (EXCLUSIVE_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1176 if (share_mode_stale_pid(lck->data, i)) {
1177 DEBUG(10, ("Found stale duplicate oplock\n"));
1178 continue;
1179 }
1180 /* Exclusive or batch - can only be one. */
1181 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1182 smb_panic("Bad exclusive or batch oplock entry.");
1183 }
1184 *pp_ex_or_batch = &lck->data->share_modes[i];
1185 }
1186
1187 if (LEVEL_II_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1188 if (*pp_batch || *pp_ex_or_batch) {
1189 if (share_mode_stale_pid(lck->data, i)) {
1190 DEBUG(10, ("Found stale LevelII "
1191 "oplock\n"));
1192 continue;
1193 }
1194 smb_panic("Bad levelII oplock entry.");
1195 }
1196 *got_level2 = true;
1197 }
1198
1199 if (lck->data->share_modes[i].op_type == NO_OPLOCK) {
1200 if (*pp_batch || *pp_ex_or_batch) {
1201 if (share_mode_stale_pid(lck->data, i)) {
1202 DEBUG(10, ("Found stale NO_OPLOCK "
1203 "entry\n"));
1204 continue;
1205 }
1206 smb_panic("Bad no oplock entry.");
1207 }
1208 *got_no_oplock = true;
1209 }
1210 }
1211 }
1212
1213 static bool delay_for_batch_oplocks(files_struct *fsp,
1214 uint64_t mid,
1215 int oplock_request,
1216 struct share_mode_entry *batch_entry)
1217 {
1218 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1219 return false;
1220 }
1221 if (batch_entry == NULL) {
1222 return false;
1223 }
1224
1225 /* Found a batch oplock */
1226 send_break_message(fsp, batch_entry, mid, oplock_request);
1227 return true;
1228 }
1229
1230 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1231 uint64_t mid,
1232 int oplock_request,
1233 struct share_mode_entry *ex_entry)
1234 {
1235 bool delay_it;
1236
1237 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1238 return false;
1239 }
1240 if (ex_entry == NULL) {
1241 return false;
1242 }
1243
1244 /* Found an exclusive or batch oplock */
1245
1246 delay_it = is_delete_request(fsp) ?
1247 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1248
1249 if (!delay_it) {
1250 return false;
1251 }
1252
1253 send_break_message(fsp, ex_entry, mid, oplock_request);
1254 return true;
1255 }
1256
1257 static bool file_has_brlocks(files_struct *fsp)
1258 {
1259 struct byte_range_lock *br_lck;
1260
1261 br_lck = brl_get_locks_readonly(fsp);
1262 if (!br_lck)
1263 return false;
1264
1265 return br_lck->num_locks > 0 ? true : false;
1266 }
1267
1268 static void grant_fsp_oplock_type(files_struct *fsp,
1269 int oplock_request,
1270 bool got_level2_oplock,
1271 bool got_a_none_oplock)
1272 {
1273 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1274 lp_level2_oplocks(SNUM(fsp->conn));
1275
1276 /* Start by granting what the client asked for,
1277 but ensure no SAMBA_PRIVATE bits can be set. */
1278 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1279
1280 if (oplock_request & INTERNAL_OPEN_ONLY) {
1281 /* No oplocks on internal open. */
1282 fsp->oplock_type = NO_OPLOCK;
1283 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1284 fsp->oplock_type, fsp_str_dbg(fsp)));
1285 return;
1286 }
1287
1288 if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1289 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1290 fsp_str_dbg(fsp)));
1291 fsp->oplock_type = NO_OPLOCK;
1292 }
1293
1294 if (is_stat_open(fsp->access_mask)) {
1295 /* Leave the value already set. */
1296 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1297 fsp->oplock_type, fsp_str_dbg(fsp)));
1298 return;
1299 }
1300
1301 /*
1302 * Match what was requested (fsp->oplock_type) with
1303 * what was found in the existing share modes.
1304 */
1305
1306 if (got_a_none_oplock) {
1307 fsp->oplock_type = NO_OPLOCK;
1308 } else if (got_level2_oplock) {
1309 if (fsp->oplock_type == NO_OPLOCK ||
1310 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1311 /* Store a level2 oplock, but don't tell the client */
1312 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1313 } else {
1314 fsp->oplock_type = LEVEL_II_OPLOCK;
1315 }
1316 } else {
1317 /* All share_mode_entries are placeholders or deferred.
1318 * Silently upgrade to fake levelII if the client didn't
1319 * ask for an oplock. */
1320 if (fsp->oplock_type == NO_OPLOCK) {
1321 /* Store a level2 oplock, but don't tell the client */
1322 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1323 }
1324 }
1325
1326 /*
1327 * Don't grant level2 to clients that don't want them
1328 * or if we've turned them off.
1329 */
1330 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1331 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1332 }
1333
1334 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1335 fsp->oplock_type, fsp_str_dbg(fsp)));
1336 }
1337
1338 bool request_timed_out(struct timeval request_time,
1339 struct timeval timeout)
1340 {
1341 struct timeval now, end_time;
1342 GetTimeOfDay(&now);
1343 end_time = timeval_sum(&request_time, &timeout);
1344 return (timeval_compare(&end_time, &now) < 0);
1345 }
1346
1347 /****************************************************************************
1348 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1349 ****************************************************************************/
1350
1351 static void defer_open(struct share_mode_lock *lck,
1352 struct timeval request_time,
1353 struct timeval timeout,
1354 struct smb_request *req,
1355 struct deferred_open_record *state)
1356 {
1357 struct server_id self = messaging_server_id(req->sconn->msg_ctx);
1358 int i;
1359
1360 /* Paranoia check */
1361
1362 for (i=0; i<lck->data->num_share_modes; i++) {
1363 struct share_mode_entry *e = &lck->data->share_modes[i];
1364
1365 if (is_deferred_open_entry(e) &&
1366 serverid_equal(&self, &e->pid) &&
1367 (e->op_mid == req->mid)) {
1368 DEBUG(0, ("Trying to defer an already deferred "
1369 "request: mid=%llu, exiting\n",
1370 (unsigned long long)req->mid));
1371 exit_server("attempt to defer a deferred request");
1372 }
1373 }
1374
1375 /* End paranoia check */
1376
1377 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1378 "open entry for mid %llu\n",
1379 (unsigned int)request_time.tv_sec,
1380 (unsigned int)request_time.tv_usec,
1381 (unsigned long long)req->mid));
1382
1383 if (!push_deferred_open_message_smb(req, request_time, timeout,
1384 state->id, (char *)state, sizeof(*state))) {
1385 exit_server("push_deferred_open_message_smb failed");
1386 }
1387 add_deferred_open(lck, req->mid, request_time, self, state->id);
1388 }
1389
1390
1391 /****************************************************************************
1392 On overwrite open ensure that the attributes match.
1393 ****************************************************************************/
1394
1395 bool open_match_attributes(connection_struct *conn,
1396 uint32 old_dos_attr,
1397 uint32 new_dos_attr,
1398 mode_t existing_unx_mode,
1399 mode_t new_unx_mode,
1400 mode_t *returned_unx_mode)
1401 {
1402 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1403
1404 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1405 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1406
1407 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1408 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1409 *returned_unx_mode = new_unx_mode;
1410 } else {
1411 *returned_unx_mode = (mode_t)0;
1412 }
1413
1414 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1415 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1416 "returned_unx_mode = 0%o\n",
1417 (unsigned int)old_dos_attr,
1418 (unsigned int)existing_unx_mode,
1419 (unsigned int)new_dos_attr,
1420 (unsigned int)*returned_unx_mode ));
1421
1422 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1423 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1424 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1425 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1426 return False;
1427 }
1428 }
1429 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1430 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1431 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1432 return False;
1433 }
1434 }
1435 return True;
1436 }
1437
1438 /****************************************************************************
1439 Special FCB or DOS processing in the case of a sharing violation.
1440 Try and find a duplicated file handle.
1441 ****************************************************************************/
1442
1443 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
1444 connection_struct *conn,
1445 files_struct *fsp_to_dup_into,
1446 const struct smb_filename *smb_fname,
1447 struct file_id id,
1448 uint16 file_pid,
1449 uint64_t vuid,
1450 uint32 access_mask,
1451 uint32 share_access,
1452 uint32 create_options)
1453 {
1454 files_struct *fsp;
1455
1456 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1457 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1458
1459 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1460 fsp = file_find_di_next(fsp)) {
1461
1462 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1463 "vuid = %llu, file_pid = %u, private_options = 0x%x "
1464 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1465 fsp->fh->fd, (unsigned long long)fsp->vuid,
1466 (unsigned int)fsp->file_pid,
1467 (unsigned int)fsp->fh->private_options,
1468 (unsigned int)fsp->access_mask ));
1469
1470 if (fsp->fh->fd != -1 &&
1471 fsp->vuid == vuid &&
1472 fsp->file_pid == file_pid &&
1473 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1474 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1475 (fsp->access_mask & FILE_WRITE_DATA) &&
1476 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1477 strequal(fsp->fsp_name->stream_name,
1478 smb_fname->stream_name)) {
1479 DEBUG(10,("fcb_or_dos_open: file match\n"));
1480 break;
1481 }
1482 }
1483
1484 if (!fsp) {
1485 return NT_STATUS_NOT_FOUND;
1486 }
1487
1488 /* quite an insane set of semantics ... */
1489 if (is_executable(smb_fname->base_name) &&
1490 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1491 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1492 return NT_STATUS_INVALID_PARAMETER;
1493 }
1494
1495 /* We need to duplicate this fsp. */
1496 return dup_file_fsp(req, fsp, access_mask, share_access,
1497 create_options, fsp_to_dup_into);
1498 }
1499
1500 static void schedule_defer_open(struct share_mode_lock *lck,
1501 struct timeval request_time,
1502 struct smb_request *req)
1503 {
1504 struct deferred_open_record state;
1505
1506 /* This is a relative time, added to the absolute
1507 request_time value to get the absolute timeout time.
1508 Note that if this is the second or greater time we enter
1509 this codepath for this particular request mid then
1510 request_time is left as the absolute time of the *first*
1511 time this request mid was processed. This is what allows
1512 the request to eventually time out. */
1513
1514 struct timeval timeout;
1515
1516 /* Normally the smbd we asked should respond within
1517 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1518 * the client did, give twice the timeout as a safety
1519 * measure here in case the other smbd is stuck
1520 * somewhere else. */
1521
1522 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1523
1524 /* Nothing actually uses state.delayed_for_oplocks
1525 but it's handy to differentiate in debug messages
1526 between a 30 second delay due to oplock break, and
1527 a 1 second delay for share mode conflicts. */
1528
1529 state.delayed_for_oplocks = True;
1530 state.id = lck->data->id;
1531
1532 if (!request_timed_out(request_time, timeout)) {
1533 defer_open(lck, request_time, timeout, req, &state);
1534 }
1535 }
1536
1537 /****************************************************************************
1538 Work out what access_mask to use from what the client sent us.
1539 ****************************************************************************/
1540
1541 static NTSTATUS smbd_calculate_maximum_allowed_access(
1542 connection_struct *conn,
1543 const struct smb_filename *smb_fname,
1544 uint32_t *p_access_mask)
1545 {
1546 struct security_descriptor *sd;
1547 uint32_t access_granted;
1548 NTSTATUS status;
1549
1550 if (get_current_uid(conn) == (uid_t)0) {
1551 *p_access_mask |= FILE_GENERIC_ALL;
1552 return NT_STATUS_OK;
1553 }
1554
1555 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1556 (SECINFO_OWNER |
1557 SECINFO_GROUP |
1558 SECINFO_DACL),&sd);
1559
1560 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1561 /*
1562 * File did not exist
1563 */
1564 *p_access_mask = FILE_GENERIC_ALL;
1565 return NT_STATUS_OK;
1566 }
1567 if (!NT_STATUS_IS_OK(status)) {
1568 DEBUG(10,("smbd_calculate_access_mask: "
1569 "Could not get acl on file %s: %s\n",
1570 smb_fname_str_dbg(smb_fname),
1571 nt_errstr(status)));
1572 return NT_STATUS_ACCESS_DENIED;
1573 }
1574
1575 /*
1576 * Never test FILE_READ_ATTRIBUTES. se_access_check()
1577 * also takes care of owner WRITE_DAC and READ_CONTROL.
1578 */
1579 status = se_access_check(sd,
1580 get_current_nttok(conn),
1581 (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1582 &access_granted);
1583
1584 TALLOC_FREE(sd);
1585
1586 if (!NT_STATUS_IS_OK(status)) {
1587 DEBUG(10, ("smbd_calculate_access_mask: "
1588 "Access denied on file %s: "
1589 "when calculating maximum access\n",
1590 smb_fname_str_dbg(smb_fname)));
1591 return NT_STATUS_ACCESS_DENIED;
1592 }
1593 *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1594 return NT_STATUS_OK;
1595 }
1596
1597 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1598 const struct smb_filename *smb_fname,
1599 uint32_t access_mask,
1600 uint32_t *access_mask_out)
1601 {
1602 NTSTATUS status;
1603 uint32_t orig_access_mask = access_mask;
1604 uint32_t rejected_share_access;
1605
1606 /*
1607 * Convert GENERIC bits to specific bits.
1608 */
1609
1610 se_map_generic(&access_mask, &file_generic_mapping);
1611
1612 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1613 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1614
1615 status = smbd_calculate_maximum_allowed_access(
1616 conn, smb_fname, &access_mask);
1617
1618 if (!NT_STATUS_IS_OK(status)) {
1619 return status;
1620 }
1621
1622 access_mask &= conn->share_access;
1623 }
1624
1625 rejected_share_access = access_mask & ~(conn->share_access);
1626
1627 if (rejected_share_access) {
1628 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1629 "file %s: rejected by share access mask[0x%08X] "
1630 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1631 smb_fname_str_dbg(smb_fname),
1632 conn->share_access,
1633 orig_access_mask, access_mask,
1634 rejected_share_access));
1635 return NT_STATUS_ACCESS_DENIED;
1636 }
1637
1638 *access_mask_out = access_mask;
1639 return NT_STATUS_OK;
1640 }
1641
1642 /****************************************************************************
1643 Remove the deferred open entry under lock.
1644 ****************************************************************************/
1645
1646 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1647 struct server_id pid)
1648 {
1649 struct share_mode_lock *lck = get_existing_share_mode_lock(
1650 talloc_tos(), id);
1651 if (lck == NULL) {
1652 DEBUG(0, ("could not get share mode lock\n"));
1653 return;
1654 }
1655 del_deferred_open_entry(lck, mid, pid);
1656 TALLOC_FREE(lck);
1657 }
1658
1659 /****************************************************************************
1660 Open a file with a share mode. Passed in an already created files_struct *.
1661 ****************************************************************************/
1662
1663 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1664 struct smb_request *req,
1665 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1666 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1667 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1668 uint32 create_options, /* options such as delete on close. */
1669 uint32 new_dos_attributes, /* attributes used for new file. */
1670 int oplock_request, /* internal Samba oplock codes. */
1671 /* Information (FILE_EXISTS etc.) */
1672 uint32_t private_flags, /* Samba specific flags. */
1673 int *pinfo,
1674 files_struct *fsp)
1675 {
1676 struct smb_filename *smb_fname = fsp->fsp_name;
1677 int flags=0;
1678 int flags2=0;
1679 bool file_existed = VALID_STAT(smb_fname->st);
1680 bool def_acl = False;
1681 bool posix_open = False;
1682 bool new_file_created = False;
1683 bool clear_ads = false;
1684 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1685 mode_t new_unx_mode = (mode_t)0;
1686 mode_t unx_mode = (mode_t)0;
1687 int info;
1688 uint32 existing_dos_attributes = 0;
1689 struct timeval request_time = timeval_zero();
1690 struct share_mode_lock *lck = NULL;
1691 uint32 open_access_mask = access_mask;
1692 NTSTATUS status;
1693 char *parent_dir;
1694
1695 if (conn->printer) {
1696 /*
1697 * Printers are handled completely differently.
1698 * Most of the passed parameters are ignored.
1699 */
1700
1701 if (pinfo) {
1702 *pinfo = FILE_WAS_CREATED;
1703 }
1704
1705 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1706 smb_fname_str_dbg(smb_fname)));
1707
1708 if (!req) {
1709 DEBUG(0,("open_file_ntcreate: printer open without "
1710 "an SMB request!\n"));
1711 return NT_STATUS_INTERNAL_ERROR;
1712 }
1713
1714 return print_spool_open(fsp, smb_fname->base_name,
1715 req->vuid);
1716 }
1717
1718 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1719 NULL)) {
1720 return NT_STATUS_NO_MEMORY;
1721 }
1722
1723 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1724 posix_open = True;
1725 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1726 new_dos_attributes = 0;
1727 } else {
1728 /* Windows allows a new file to be created and
1729 silently removes a FILE_ATTRIBUTE_DIRECTORY
1730 sent by the client. Do the same. */
1731
1732 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1733
1734 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1735 * created new. */
1736 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1737 smb_fname, parent_dir);
1738 }
1739
1740 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1741 "access_mask=0x%x share_access=0x%x "
1742 "create_disposition = 0x%x create_options=0x%x "
1743 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1744 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1745 access_mask, share_access, create_disposition,
1746 create_options, (unsigned int)unx_mode, oplock_request,
1747 (unsigned int)private_flags));
1748
1749 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1750 DEBUG(0, ("No smb request but not an internal only open!\n"));
1751 return NT_STATUS_INTERNAL_ERROR;
1752 }
1753
1754 /*
1755 * Only non-internal opens can be deferred at all
1756 */
1757
1758 if (req) {
1759 void *ptr;
1760 if (get_deferred_open_message_state(req,
1761 &request_time,
1762 &ptr)) {
1763
1764 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1765 /* Remember the absolute time of the original
1766 request with this mid. We'll use it later to
1767 see if this has timed out. */
1768
1769 /* Remove the deferred open entry under lock. */
1770 remove_deferred_open_entry(
1771 state->id, req->mid,
1772 messaging_server_id(req->sconn->msg_ctx));
1773
1774 /* Ensure we don't reprocess this message. */
1775 remove_deferred_open_message_smb(req->sconn, req->mid);
1776 }
1777 }
1778
1779 if (!posix_open) {
1780 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1781 if (file_existed) {
1782 existing_dos_attributes = dos_mode(conn, smb_fname);
1783 }
1784 }
1785
1786 /* ignore any oplock requests if oplocks are disabled */
1787 if (!lp_oplocks(SNUM(conn)) ||
1788 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1789 /* Mask off everything except the private Samba bits. */
1790 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1791 }
1792
1793 /* this is for OS/2 long file names - say we don't support them */
1794 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1795 /* OS/2 Workplace shell fix may be main code stream in a later
1796 * release. */
1797 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1798 "supported.\n"));
1799 if (use_nt_status()) {
1800 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1801 }
1802 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1803 }
1804
1805 switch( create_disposition ) {
1806 /*
1807 * Currently we're using FILE_SUPERSEDE as the same as
1808 * FILE_OVERWRITE_IF but they really are
1809 * different. FILE_SUPERSEDE deletes an existing file
1810 * (requiring delete access) then recreates it.
1811 */
1812 case FILE_SUPERSEDE:
1813 /* If file exists replace/overwrite. If file doesn't
1814 * exist create. */
1815 flags2 |= (O_CREAT | O_TRUNC);
1816 clear_ads = true;
1817 break;
1818
1819 case FILE_OVERWRITE_IF:
1820 /* If file exists replace/overwrite. If file doesn't
1821 * exist create. */
1822 flags2 |= (O_CREAT | O_TRUNC);
1823 clear_ads = true;
1824 break;
1825
1826 case FILE_OPEN:
1827 /* If file exists open. If file doesn't exist error. */
1828 if (!file_existed) {
1829 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1830 "requested for file %s and file "
1831 "doesn't exist.\n",
1832 smb_fname_str_dbg(smb_fname)));
1833 errno = ENOENT;
1834 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1835 }
1836 break;
1837
1838 case FILE_OVERWRITE:
1839 /* If file exists overwrite. If file doesn't exist
1840 * error. */
1841 if (!file_existed) {
1842 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1843 "requested for file %s and file "
1844 "doesn't exist.\n",
1845 smb_fname_str_dbg(smb_fname) ));
1846 errno = ENOENT;
1847 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1848 }
1849 flags2 |= O_TRUNC;
1850 clear_ads = true;
1851 break;
1852
1853 case FILE_CREATE:
1854 /* If file exists error. If file doesn't exist
1855 * create. */
1856 if (file_existed) {
1857 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1858 "requested for file %s and file "
1859 "already exists.\n",
1860 smb_fname_str_dbg(smb_fname)));
1861 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1862 errno = EISDIR;
1863 } else {
1864 errno = EEXIST;
1865 }
1866 return map_nt_error_from_unix(errno);
1867 }
1868 flags2 |= (O_CREAT|O_EXCL);
1869 break;
1870
1871 case FILE_OPEN_IF:
1872 /* If file exists open. If file doesn't exist
1873 * create. */
1874 flags2 |= O_CREAT;
1875 break;
1876
1877 default:
1878 return NT_STATUS_INVALID_PARAMETER;
1879 }
1880
1881 /* We only care about matching attributes on file exists and
1882 * overwrite. */
1883
1884 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1885 (create_disposition == FILE_OVERWRITE_IF))) {
1886 if (!open_match_attributes(conn, existing_dos_attributes,
1887 new_dos_attributes,
1888 smb_fname->st.st_ex_mode,
1889 unx_mode, &new_unx_mode)) {
1890 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1891 "for file %s (%x %x) (0%o, 0%o)\n",
1892 smb_fname_str_dbg(smb_fname),
1893 existing_dos_attributes,
1894 new_dos_attributes,
1895 (unsigned int)smb_fname->st.st_ex_mode,
1896 (unsigned int)unx_mode ));
1897 errno = EACCES;
1898 return NT_STATUS_ACCESS_DENIED;
1899 }
1900 }
1901
1902 status = smbd_calculate_access_mask(conn, smb_fname,
1903 access_mask,
1904 &access_mask);
1905 if (!NT_STATUS_IS_OK(status)) {
1906 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1907 "on file %s returned %s\n",
1908 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1909 return status;
1910 }
1911
1912 open_access_mask = access_mask;
1913
1914 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1915 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1916 }
1917
1918 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1919 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1920 access_mask));
1921
1922 /*
1923 * Note that we ignore the append flag as append does not
1924 * mean the same thing under DOS and Unix.
1925 */
1926
1927 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1928 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1929 /* DENY_DOS opens are always underlying read-write on the
1930 file handle, no matter what the requested access mask
1931 says. */
1932 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1933 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1934 flags = O_RDWR;
1935 } else {
1936 flags = O_WRONLY;
1937 }
1938 } else {
1939 flags = O_RDONLY;
1940 }
1941
1942 /*
1943 * Currently we only look at FILE_WRITE_THROUGH for create options.
1944 */
1945
1946 #if defined(O_SYNC)
1947 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1948 flags2 |= O_SYNC;
1949 }
1950 #endif /* O_SYNC */
1951
1952 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1953 flags2 |= O_APPEND;
1954 }
1955
1956 if (!posix_open && !CAN_WRITE(conn)) {
1957 /*
1958 * We should really return a permission denied error if either
1959 * O_CREAT or O_TRUNC are set, but for compatibility with
1960 * older versions of Samba we just AND them out.
1961 */
1962 flags2 &= ~(O_CREAT|O_TRUNC);
1963 }
1964
1965 /*
1966 * Ensure we can't write on a read-only share or file.
1967 */
1968
1969 if (flags != O_RDONLY && file_existed &&
1970 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1971 DEBUG(5,("open_file_ntcreate: write access requested for "
1972 "file %s on read only %s\n",
1973 smb_fname_str_dbg(smb_fname),
1974 !CAN_WRITE(conn) ? "share" : "file" ));
1975 errno = EACCES;
1976 return NT_STATUS_ACCESS_DENIED;
1977 }
1978
1979 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1980 fsp->share_access = share_access;
1981 fsp->fh->private_options = private_flags;
1982 fsp->access_mask = open_access_mask; /* We change this to the
1983 * requested access_mask after
1984 * the open is done. */
1985 fsp->posix_open = posix_open;
1986
1987 /* Ensure no SAMBA_PRIVATE bits can be set. */
1988 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1989
1990 if (timeval_is_zero(&request_time)) {
1991 request_time = fsp->open_time;
1992 }
1993
1994 if (file_existed) {
1995 struct share_mode_entry *batch_entry = NULL;
1996 struct share_mode_entry *exclusive_entry = NULL;
1997 bool got_level2_oplock = false;
1998 bool got_a_none_oplock = false;
1999 struct file_id id;
2000
2001 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2002 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2003
2004 lck = get_share_mode_lock(talloc_tos(), id,
2005 conn->connectpath,
2006 smb_fname, &old_write_time);
2007 if (lck == NULL) {
2008 DEBUG(0, ("Could not get share mode lock\n"));
2009 return NT_STATUS_SHARING_VIOLATION;
2010 }
2011
2012 /* Get the types we need to examine. */
2013 find_oplock_types(fsp,
2014 oplock_request,
2015 lck,
2016 &batch_entry,
2017 &exclusive_entry,
2018 &got_level2_oplock,
2019 &got_a_none_oplock);
2020
2021 /* First pass - send break only on batch oplocks. */
2022 if ((req != NULL) &&
2023 delay_for_batch_oplocks(fsp,
2024 req->mid,
2025 oplock_request,
2026 batch_entry)) {
2027 schedule_defer_open(lck, request_time, req);
2028 TALLOC_FREE(lck);
2029 return NT_STATUS_SHARING_VIOLATION;
2030 }
2031
2032 /* Use the client requested access mask here, not the one we
2033 * open with. */
2034 status = open_mode_check(conn, lck, fsp->name_hash,
2035 access_mask, share_access,
2036 create_options, &file_existed);
2037
2038 if (NT_STATUS_IS_OK(status)) {
2039 /* We might be going to allow this open. Check oplock
2040 * status again. */
2041 /* Second pass - send break for both batch or
2042 * exclusive oplocks. */
2043 if ((req != NULL) &&
2044 delay_for_exclusive_oplocks(
2045 fsp,
2046 req->mid,
2047 oplock_request,
2048 exclusive_entry)) {
2049 schedule_defer_open(lck, request_time, req);
2050 TALLOC_FREE(lck);
2051 return NT_STATUS_SHARING_VIOLATION;
2052 }
2053 }
2054
2055 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2056 /* DELETE_PENDING is not deferred for a second */
2057 TALLOC_FREE(lck);
2058 return status;
2059 }
2060
2061 grant_fsp_oplock_type(fsp,
2062 oplock_request,
2063 got_level2_oplock,
2064 got_a_none_oplock);
2065
2066 if (!NT_STATUS_IS_OK(status)) {
2067 uint32 can_access_mask;
2068 bool can_access = True;
2069
2070 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2071
2072 /* Check if this can be done with the deny_dos and fcb
2073 * calls. */
2074 if (private_flags &
2075 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2076 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2077 if (req == NULL) {
2078 DEBUG(0, ("DOS open without an SMB "
2079 "request!\n"));
2080 TALLOC_FREE(lck);
2081 return NT_STATUS_INTERNAL_ERROR;
2082 }
2083
2084 /* Use the client requested access mask here,
2085 * not the one we open with. */
2086 status = fcb_or_dos_open(req,
2087 conn,
2088 fsp,
2089 smb_fname,
2090 id,
2091 req->smbpid,
2092 req->vuid,
2093 access_mask,
2094 share_access,
2095 create_options);
2096
2097 if (NT_STATUS_IS_OK(status)) {
2098 TALLOC_FREE(lck);
2099 if (pinfo) {
2100 *pinfo = FILE_WAS_OPENED;
2101 }
2102 return NT_STATUS_OK;
2103 }
2104 }
2105
2106 /*
2107 * This next line is a subtlety we need for
2108 * MS-Access. If a file open will fail due to share
2109 * permissions and also for security (access) reasons,
2110 * we need to return the access failed error, not the
2111 * share error. We can't open the file due to kernel
2112 * oplock deadlock (it's possible we failed above on
2113 * the open_mode_check()) so use a userspace check.
2114 */
2115
2116 if (flags & O_RDWR) {
2117 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2118 } else if (flags & O_WRONLY) {
2119 can_access_mask = FILE_WRITE_DATA;
2120 } else {
2121 can_access_mask = FILE_READ_DATA;
2122 }
2123
2124 if (((can_access_mask & FILE_WRITE_DATA) &&
2125 !CAN_WRITE(conn)) ||
2126 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2127 smb_fname, can_access_mask))) {
2128 can_access = False;
2129 }
2130
2131 /*
2132 * If we're returning a share violation, ensure we
2133 * cope with the braindead 1 second delay.
2134 */
2135
2136 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2137 lp_defer_sharing_violations()) {
2138 struct timeval timeout;
2139 struct deferred_open_record state;
2140 int timeout_usecs;
2141
2142 /* this is a hack to speed up torture tests
2143 in 'make test' */
2144 timeout_usecs = lp_parm_int(SNUM(conn),
2145 "smbd","sharedelay",
2146 SHARING_VIOLATION_USEC_WAIT);
2147
2148 /* This is a relative time, added to the absolute
2149 request_time value to get the absolute timeout time.
2150 Note that if this is the second or greater time we enter
2151 this codepath for this particular request mid then
2152 request_time is left as the absolute time of the *first*
2153 time this request mid was processed. This is what allows
2154 the request to eventually time out. */
2155
2156 timeout = timeval_set(0, timeout_usecs);
2157
2158 /* Nothing actually uses state.delayed_for_oplocks
2159 but it's handy to differentiate in debug messages
2160 between a 30 second delay due to oplock break, and
2161 a 1 second delay for share mode conflicts. */
2162
2163 state.delayed_for_oplocks = False;
2164 state.id = id;
2165
2166 if ((req != NULL)
2167 && !request_timed_out(request_time,
2168 timeout)) {
2169 defer_open(lck, request_time, timeout,
2170 req, &state);
2171 }
2172 }
2173
2174 TALLOC_FREE(lck);
2175 if (can_access) {
2176 /*
2177 * We have detected a sharing violation here
2178 * so return the correct error code
2179 */
2180 status = NT_STATUS_SHARING_VIOLATION;
2181 } else {
2182 status = NT_STATUS_ACCESS_DENIED;
2183 }
2184 return status;
2185 }
2186
2187 /*
2188 * We exit this block with the share entry *locked*.....
2189 */
2190 }
2191
2192 SMB_ASSERT(!file_existed || (lck != NULL));
2193
2194 /*
2195 * Ensure we pay attention to default ACLs on directories if required.
2196 */
2197
2198 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2199 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2200 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2201 }
2202
2203 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2204 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2205 (unsigned int)flags, (unsigned int)flags2,
2206 (unsigned int)unx_mode, (unsigned int)access_mask,
2207 (unsigned int)open_access_mask));
2208
2209 /*
2210 * open_file strips any O_TRUNC flags itself.
2211 */
2212
2213 fsp_open = open_file(fsp, conn, req, parent_dir,
2214 flags|flags2, unx_mode, access_mask,
2215 open_access_mask);
2216
2217 if (!NT_STATUS_IS_OK(fsp_open)) {
2218 TALLOC_FREE(lck);
2219 return fsp_open;
2220 }
2221
2222 if (!file_existed) {
2223 struct share_mode_entry *batch_entry = NULL;
2224 struct share_mode_entry *exclusive_entry = NULL;
2225 bool got_level2_oplock = false;
2226 bool got_a_none_oplock = false;
2227 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2228 struct file_id id;
2229 /*
2230 * Deal with the race condition where two smbd's detect the
2231 * file doesn't exist and do the create at the same time. One
2232 * of them will win and set a share mode, the other (ie. this
2233 * one) should check if the requested share mode for this
2234 * create is allowed.
2235 */
2236
2237 /*
2238 * Now the file exists and fsp is successfully opened,
2239 * fsp->dev and fsp->inode are valid and should replace the
2240 * dev=0,inode=0 from a non existent file. Spotted by
2241 * Nadav Danieli <nadavd@exanet.com>. JRA.
2242 */
2243
2244 id = fsp->file_id;
2245
2246 lck = get_share_mode_lock(talloc_tos(), id,
2247 conn->connectpath,
2248 smb_fname, &old_write_time);
2249
2250 if (lck == NULL) {
2251 DEBUG(0, ("open_file_ntcreate: Could not get share "
2252 "mode lock for %s\n",
2253 smb_fname_str_dbg(smb_fname)));
2254 fd_close(fsp);
2255 return NT_STATUS_SHARING_VIOLATION;
2256 }
2257
2258 /* Get the types we need to examine. */
2259 find_oplock_types(fsp,
2260 oplock_request,
2261 lck,
2262 &batch_entry,
2263 &exclusive_entry,
2264 &got_level2_oplock,
2265 &got_a_none_oplock);
2266
2267 /* First pass - send break only on batch oplocks. */
2268 if ((req != NULL) &&
2269 delay_for_batch_oplocks(fsp,
2270 req->mid,
2271 oplock_request,
2272 batch_entry)) {
2273 schedule_defer_open(lck, request_time, req);
2274 TALLOC_FREE(lck);
2275 fd_close(fsp);
2276 return NT_STATUS_SHARING_VIOLATION;
2277 }
2278
2279 status = open_mode_check(conn, lck, fsp->name_hash,
2280 access_mask, share_access,
2281 create_options, &file_existed);
2282
2283 if (NT_STATUS_IS_OK(status)) {
2284 /* We might be going to allow this open. Check oplock
2285 * status again. */
2286 /* Second pass - send break for both batch or
2287 * exclusive oplocks. */
2288 if ((req != NULL) &&
2289 delay_for_exclusive_oplocks(
2290 fsp,
2291 req->mid,
2292 oplock_request,
2293 exclusive_entry)) {
2294 schedule_defer_open(lck, request_time, req);
2295 TALLOC_FREE(lck);
2296 fd_close(fsp);
2297 return NT_STATUS_SHARING_VIOLATION;
2298 }
2299 }
2300
2301 if (!NT_STATUS_IS_OK(status)) {
2302 struct deferred_open_record state;
2303
2304 state.delayed_for_oplocks = False;
2305 state.id = id;
2306
2307 /* Do it all over again immediately. In the second
2308 * round we will find that the file existed and handle
2309 * the DELETE_PENDING and FCB cases correctly. No need
2310 * to duplicate the code here. Essentially this is a
2311 * "goto top of this function", but don't tell
2312 * anybody... */
2313
2314 if (req != NULL) {
2315 defer_open(lck, request_time, timeval_zero(),
2316 req, &state);
2317 }
2318 TALLOC_FREE(lck);
2319 fd_close(fsp);
2320 return status;
2321 }
2322
2323 grant_fsp_oplock_type(fsp,
2324 oplock_request,
2325 got_level2_oplock,
2326 got_a_none_oplock);
2327
2328 /*
2329 * We exit this block with the share entry *locked*.....
2330 */
2331
2332 }
2333
2334 SMB_ASSERT(lck != NULL);
2335
2336 /* Delete streams if create_disposition requires it */
2337 if (file_existed && clear_ads &&
2338 !is_ntfs_stream_smb_fname(smb_fname)) {
2339 status = delete_all_streams(conn, smb_fname->base_name);
2340 if (!NT_STATUS_IS_OK(status)) {
2341 TALLOC_FREE(lck);
2342 fd_close(fsp);
2343 return status;
2344 }
2345 }
2346
2347 /* note that we ignore failure for the following. It is
2348 basically a hack for NFS, and NFS will never set one of
2349 these only read them. Nobody but Samba can ever set a deny
2350 mode and we have already checked our more authoritative
2351 locking database for permission to set this deny mode. If
2352 the kernel refuses the operations then the kernel is wrong.
2353 note that GPFS supports it as well - jmcd */
2354
2355 if (fsp->fh->fd != -1) {
2356 int ret_flock;
2357 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2358 if(ret_flock == -1 ){
2359
2360 TALLOC_FREE(lck);
2361 fd_close(fsp);
2362
2363 return NT_STATUS_SHARING_VIOLATION;
2364 }
2365 }
2366
2367 /*
2368 * At this point onwards, we can guarentee that the share entry
2369 * is locked, whether we created the file or not, and that the
2370 * deny mode is compatible with all current opens.
2371 */
2372
2373 /*
2374 * If requested, truncate the file.
2375 */
2376
2377 if (file_existed && (flags2&O_TRUNC)) {
2378 /*
2379 * We are modifying the file after open - update the stat
2380 * struct..
2381 */
2382 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2383 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2384 status = map_nt_error_from_unix(errno);
2385 TALLOC_FREE(lck);
2386 fd_close(fsp);
2387 return status;
2388 }
2389 }
2390
2391 /*
2392 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2393 * but we don't have to store this - just ignore it on access check.
2394 */
2395 if (conn->sconn->using_smb2) {
2396 /*
2397 * SMB2 doesn't return it (according to Microsoft tests).
2398 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2399 * File created with access = 0x7 (Read, Write, Delete)
2400 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2401 */
2402 fsp->access_mask = access_mask;
2403 } else {
2404 /* But SMB1 does. */
2405 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2406 }
2407
2408 if (file_existed) {
2409 /* stat opens on existing files don't get oplocks. */
2410 if (is_stat_open(open_access_mask)) {
2411 fsp->oplock_type = NO_OPLOCK;
2412 }
2413
2414 if (flags2 & O_TRUNC) {
2415 info = FILE_WAS_OVERWRITTEN;
2416 } else {
2417 info = FILE_WAS_OPENED;
2418 }
2419 } else {
2420 info = FILE_WAS_CREATED;
2421 }
2422
2423 if (pinfo) {
2424 *pinfo = info;
2425 }
2426
2427 /*
2428 * Setup the oplock info in both the shared memory and
2429 * file structs.
2430 */
2431
2432 status = set_file_oplock(fsp, fsp->oplock_type);
2433 if (!NT_STATUS_IS_OK(status)) {
2434 /*
2435 * Could not get the kernel oplock or there are byte-range
2436 * locks on the file.
2437 */
2438 fsp->oplock_type = NO_OPLOCK;
2439 }
2440
2441 set_share_mode(lck, fsp, get_current_uid(conn),
2442 req ? req->mid : 0,
2443 fsp->oplock_type);
2444
2445 /* Handle strange delete on close create semantics. */
2446 if (create_options & FILE_DELETE_ON_CLOSE) {
2447
2448 status = can_set_delete_on_close(fsp, new_dos_attributes);
2449
2450 if (!NT_STATUS_IS_OK(status)) {
2451 /* Remember to delete the mode we just added. */
2452 del_share_mode(lck, fsp);
2453 TALLOC_FREE(lck);
2454 fd_close(fsp);
2455 return status;
2456 }
2457 /* Note that here we set the *inital* delete on close flag,
2458 not the regular one. The magic gets handled in close. */
2459 fsp->initial_delete_on_close = True;
2460 }
2461
2462 if (info == FILE_WAS_OVERWRITTEN
2463 || info == FILE_WAS_CREATED
2464 || info == FILE_WAS_SUPERSEDED) {
2465 new_file_created = True;
2466 }
2467
2468 if (new_file_created) {
2469 /* Files should be initially set as archive */
2470 if (lp_map_archive(SNUM(conn)) ||
2471 lp_store_dos_attributes(SNUM(conn))) {
2472 if (!posix_open) {
2473 if (file_set_dosmode(conn, smb_fname,
2474 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2475 parent_dir, true) == 0) {
2476 unx_mode = smb_fname->st.st_ex_mode;
2477 }
2478 }
2479 }
2480 }
2481
2482 /* Determine sparse flag. */
2483 if (posix_open) {
2484 /* POSIX opens are sparse by default. */
2485 fsp->is_sparse = true;
2486 } else {
2487 fsp->is_sparse = (file_existed &&
2488 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2489 }
2490
2491 /*
2492 * Take care of inherited ACLs on created files - if default ACL not
2493 * selected.
2494 */
2495
2496 if (!posix_open && !file_existed && !def_acl) {
2497
2498 int saved_errno = errno; /* We might get ENOSYS in the next
2499 * call.. */
2500
2501 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2502 errno == ENOSYS) {
2503 errno = saved_errno; /* Ignore ENOSYS */
2504 }
2505
2506 } else if (new_unx_mode) {
2507
2508 int ret = -1;
2509
2510 /* Attributes need changing. File already existed. */
2511
2512 {
2513 int saved_errno = errno; /* We might get ENOSYS in the
2514 * next call.. */
2515 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2516
2517 if (ret == -1 && errno == ENOSYS) {
2518 errno = saved_errno; /* Ignore ENOSYS */
2519 } else {
2520 DEBUG(5, ("open_file_ntcreate: reset "
2521 "attributes of file %s to 0%o\n",
2522 smb_fname_str_dbg(smb_fname),
2523 (unsigned int)new_unx_mode));
2524 ret = 0; /* Don't do the fchmod below. */
2525 }
2526 }
2527
2528 if ((ret == -1) &&
2529 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2530 DEBUG(5, ("open_file_ntcreate: failed to reset "
2531 "attributes of file %s to 0%o\n",
2532 smb_fname_str_dbg(smb_fname),
2533 (unsigned int)new_unx_mode));
2534 }
2535
2536 /* If this is a successful open, we must remove any deferred open
2537 * records. */
2538 if (req != NULL) {
2539 del_deferred_open_entry(lck, req->mid,
2540 messaging_server_id(req->sconn->msg_ctx));
2541 }
2542 TALLOC_FREE(lck);
2543
2544 return NT_STATUS_OK;
2545 }
2546
2547
2548 /****************************************************************************
2549 Open a file for for write to ensure that we can fchmod it.
2550 ****************************************************************************/
2551
2552 NTSTATUS open_file_fchmod(connection_struct *conn,
2553 struct smb_filename *smb_fname,
2554 files_struct **result)
2555 {
2556 if (!VALID_STAT(smb_fname->st)) {
2557 return NT_STATUS_INVALID_PARAMETER;
2558 }
2559
2560 return SMB_VFS_CREATE_FILE(
2561 conn, /* conn */
2562 NULL, /* req */
2563 0, /* root_dir_fid */
2564 smb_fname, /* fname */
2565 FILE_WRITE_DATA, /* access_mask */
2566 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2567 FILE_SHARE_DELETE),
2568 FILE_OPEN, /* create_disposition*/
2569 0, /* create_options */
2570 0, /* file_attributes */
2571 INTERNAL_OPEN_ONLY, /* oplock_request */
2572 0, /* allocation_size */
2573 0, /* private_flags */
2574 NULL, /* sd */
2575 NULL, /* ea_list */
2576 result, /* result */
2577 NULL); /* pinfo */
2578 }
2579
2580 static NTSTATUS mkdir_internal(connection_struct *conn,
2581 struct smb_filename *smb_dname,
2582 uint32 file_attributes)
2583 {
2584 mode_t mode;
2585 char *parent_dir = NULL;
2586 NTSTATUS status;
2587 bool posix_open = false;
2588 bool need_re_stat = false;
2589 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2590
2591 if(access_mask & ~(conn->share_access)) {
2592 DEBUG(5,("mkdir_internal: failing share access "
2593 "%s\n", lp_servicename(SNUM(conn))));
2594 return NT_STATUS_ACCESS_DENIED;
2595 }
2596
2597 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2598 NULL)) {
2599 return NT_STATUS_NO_MEMORY;
2600 }
2601
2602 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2603 posix_open = true;
2604 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2605 } else {
2606 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2607 }
2608
2609 status = check_parent_access(conn,
2610 smb_dname,
2611 access_mask);
2612 if(!NT_STATUS_IS_OK(status)) {
2613 DEBUG(5,("mkdir_internal: check_parent_access "
2614 "on directory %s for path %s returned %s\n",
2615 parent_dir,
2616 smb_dname->base_name,
2617 nt_errstr(status) ));
2618 return status;
2619 }
2620
2621 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2622 return map_nt_error_from_unix(errno);
2623 }
2624
2625 /* Ensure we're checking for a symlink here.... */
2626 /* We don't want to get caught by a symlink racer. */
2627
2628 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2629 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2630 smb_fname_str_dbg(smb_dname), strerror(errno)));
2631 return map_nt_error_from_unix(errno);
2632 }
2633
2634 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2635 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2636 smb_fname_str_dbg(smb_dname)));
2637 return NT_STATUS_NOT_A_DIRECTORY;
2638 }
2639
2640 if (lp_store_dos_attributes(SNUM(conn))) {
2641 if (!posix_open) {
2642 file_set_dosmode(conn, smb_dname,
2643 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2644 parent_dir, true);
2645 }
2646 }
2647
2648 if (lp_inherit_perms(SNUM(conn))) {
2649 inherit_access_posix_acl(conn, parent_dir,
2650 smb_dname->base_name, mode);
2651 need_re_stat = true;
2652 }
2653
2654 if (!posix_open) {
2655 /*
2656 * Check if high bits should have been set,
2657 * then (if bits are missing): add them.
2658 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2659 * dir.
2660 */
2661 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2662 (mode & ~smb_dname->st.st_ex_mode)) {
2663 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2664 (smb_dname->st.st_ex_mode |
2665 (mode & ~smb_dname->st.st_ex_mode)));
2666 need_re_stat = true;
2667 }
2668 }
2669
2670 /* Change the owner if required. */
2671 if (lp_inherit_owner(SNUM(conn))) {
2672 change_dir_owner_to_parent(conn, parent_dir,
2673 smb_dname->base_name,
2674 &smb_dname->st);
2675 need_re_stat = true;
2676 }
2677
2678 if (need_re_stat) {
2679 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2680 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2681 smb_fname_str_dbg(smb_dname), strerror(errno)));
2682 return map_nt_error_from_unix(errno);
2683 }
2684 }
2685
2686 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2687 smb_dname->base_name);
2688
2689 return NT_STATUS_OK;
2690 }
2691
2692 /****************************************************************************
2693 Ensure we didn't get symlink raced on opening a directory.
2694 ****************************************************************************/
2695
2696 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2697 const SMB_STRUCT_STAT *sbuf2)
2698 {
2699 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2700 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2701 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2702 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2703 return false;
2704 }
2705 return true;
2706 }
2707
2708 /****************************************************************************
2709 Open a directory from an NT SMB call.
2710 ****************************************************************************/
2711
2712 static NTSTATUS open_directory(connection_struct *conn,
2713 struct smb_request *req,
2714 struct smb_filename *smb_dname,
2715 uint32 access_mask,
2716 uint32 share_access,
2717 uint32 create_disposition,
2718 uint32 create_options,
2719 uint32 file_attributes,
2720 int *pinfo,
2721 files_struct **result)
2722 {
2723 files_struct *fsp = NULL;
2724 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2725 struct share_mode_lock *lck = NULL;
2726 NTSTATUS status;
2727 struct timespec mtimespec;
2728 int info = 0;
2729
2730 if (is_ntfs_stream_smb_fname(smb_dname)) {
2731 DEBUG(2, ("open_directory: %s is a stream name!\n",
2732 smb_fname_str_dbg(smb_dname)));
2733 return NT_STATUS_NOT_A_DIRECTORY;
2734 }
2735
2736 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2737 /* Ensure we have a directory attribute. */
2738 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2739 }
2740
2741 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2742 "share_access = 0x%x create_options = 0x%x, "
2743 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2744 smb_fname_str_dbg(smb_dname),
2745 (unsigned int)access_mask,
2746 (unsigned int)share_access,
2747 (unsigned int)create_options,
2748 (unsigned int)create_disposition,
2749 (unsigned int)file_attributes));
2750
2751 status = smbd_calculate_access_mask(conn, smb_dname,
2752 access_mask, &access_mask);
2753 if (!NT_STATUS_IS_OK(status)) {
2754 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2755 "on file %s returned %s\n",
2756 smb_fname_str_dbg(smb_dname),
2757 nt_errstr(status)));
2758 return status;
2759 }
2760
2761 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2762 !security_token_has_privilege(get_current_nttok(conn),
2763 SEC_PRIV_SECURITY)) {
2764 DEBUG(10, ("open_directory: open on %s "
2765 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2766 smb_fname_str_dbg(smb_dname)));
2767 return NT_STATUS_PRIVILEGE_NOT_HELD;
2768 }
2769
2770 switch( create_disposition ) {
2771 case FILE_OPEN:
2772
2773 if (!dir_existed) {
2774 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2775 }
2776
2777 info = FILE_WAS_OPENED;
2778 break;
2779
2780 case FILE_CREATE:
2781
2782 /* If directory exists error. If directory doesn't
2783 * exist create. */
2784
2785 if (dir_existed) {
2786 status = NT_STATUS_OBJECT_NAME_COLLISION;
2787 DEBUG(2, ("open_directory: unable to create "
2788 "%s. Error was %s\n",
2789 smb_fname_str_dbg(smb_dname),
2790 nt_errstr(status)));
2791 return status;
2792 }
2793
2794 status = mkdir_internal(conn, smb_dname,
2795 file_attributes);
2796
2797 if (!NT_STATUS_IS_OK(status)) {
2798 DEBUG(2, ("open_directory: unable to create "
2799 "%s. Error was %s\n",
2800 smb_fname_str_dbg(smb_dname),
2801 nt_errstr(status)));
2802 return status;
2803 }
2804
2805 info = FILE_WAS_CREATED;
2806 break;
2807
2808 case FILE_OPEN_IF:
2809 /*
2810 * If directory exists open. If directory doesn't
2811 * exist create.
2812 */
2813
2814 if (dir_existed) {
2815 status = NT_STATUS_OK;
2816 info = FILE_WAS_OPENED;
2817 } else {
2818 status = mkdir_internal(conn, smb_dname,
2819 file_attributes);
2820
2821 if (NT_STATUS_IS_OK(status)) {
2822 info = FILE_WAS_CREATED;
2823 } else {
2824 /* Cope with create race. */
2825 if (!NT_STATUS_EQUAL(status,
2826 NT_STATUS_OBJECT_NAME_COLLISION)) {
2827 DEBUG(2, ("open_directory: unable to create "
2828 "%s. Error was %s\n",
2829 smb_fname_str_dbg(smb_dname),
2830 nt_errstr(status)));
2831 return status;
2832 }
2833 info = FILE_WAS_OPENED;
2834 }
2835 }
2836
2837 break;
2838
2839 case FILE_SUPERSEDE:
2840 case FILE_OVERWRITE:
2841 case FILE_OVERWRITE_IF:
2842 default:
2843 DEBUG(5,("open_directory: invalid create_disposition "
2844 "0x%x for directory %s\n",
2845 (unsigned int)create_disposition,
2846 smb_fname_str_dbg(smb_dname)));
2847 return NT_STATUS_INVALID_PARAMETER;
2848 }
2849
2850 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2851 DEBUG(5,("open_directory: %s is not a directory !\n",
2852 smb_fname_str_dbg(smb_dname)));
2853 return NT_STATUS_NOT_A_DIRECTORY;
2854 }
2855
2856 if (info == FILE_WAS_OPENED) {
2857 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2858 if (!NT_STATUS_IS_OK(status)) {
2859 DEBUG(10, ("open_directory: smbd_check_access_rights on "
2860 "file %s failed with %s\n",
2861 smb_fname_str_dbg(smb_dname),
2862 nt_errstr(status)));
2863 return status;
2864 }
2865 }
2866
2867 status = file_new(req, conn, &fsp);
2868 if(!NT_STATUS_IS_OK(status)) {
2869 return status;
2870 }
2871
2872 /*
2873 * Setup the files_struct for it.
2874 */
2875
2876 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2877 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2878 fsp->file_pid = req ? req->smbpid : 0;
2879 fsp->can_lock = False;
2880 fsp->can_read = False;
2881 fsp->can_write = False;
2882
2883 fsp->share_access = share_access;
2884 fsp->fh->private_options = 0;
2885 /*
2886 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2887 */
2888 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2889 fsp->print_file = NULL;
2890 fsp->modified = False;
2891 fsp->oplock_type = NO_OPLOCK;
2892 fsp->sent_oplock_break = NO_BREAK_SENT;
2893 fsp->is_directory = True;
2894 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2895 status = fsp_set_smb_fname(fsp, smb_dname);
2896 if (!NT_STATUS_IS_OK(status)) {
2897 file_free(req, fsp);
2898 return status;
2899 }
2900
2901 mtimespec = smb_dname->st.st_ex_mtime;
2902
2903 #ifdef O_DIRECTORY
2904 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2905 #else
2906 /* POSIX allows us to open a directory with O_RDONLY. */
2907 status = fd_open(conn, fsp, O_RDONLY, 0);
2908 #endif
2909 if (!NT_STATUS_IS_OK(status)) {
2910 DEBUG(5, ("open_directory: Could not open fd for "
2911 "%s (%s)\n",
2912 smb_fname_str_dbg(smb_dname),
2913 nt_errstr(status)));
2914 file_free(req, fsp);
2915 return status;
2916 }
2917
2918 status = vfs_stat_fsp(fsp);
2919 if (!NT_STATUS_IS_OK(status)) {
2920 fd_close(fsp);
2921 file_free(req, fsp);
2922 return status;
2923 }
2924
2925 /* Ensure there was no race condition. */
2926 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2927 DEBUG(5,("open_directory: stat struct differs for "
2928 "directory %s.\n",
2929 smb_fname_str_dbg(smb_dname)));
2930 fd_close(fsp);
2931 file_free(req, fsp);
2932 return NT_STATUS_ACCESS_DENIED;
2933 }
2934
2935 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2936 conn->connectpath, smb_dname,
2937 &mtimespec);
2938
2939 if (lck == NULL) {
2940 DEBUG(0, ("open_directory: Could not get share mode lock for "
2941 "%s\n", smb_fname_str_dbg(smb_dname)));
2942 fd_close(fsp);
2943 file_free(req, fsp);
2944 return NT_STATUS_SHARING_VIOLATION;
2945 }
2946
2947 status = open_mode_check(conn, lck, fsp->name_hash,
2948 access_mask, share_access,
2949 create_options, &dir_existed);
2950
2951 if (!NT_STATUS_IS_OK(status)) {
2952 TALLOC_FREE(lck);
2953 fd_close(fsp);
2954 file_free(req, fsp);
2955 return status;
2956 }
2957
2958 set_share_mode(lck, fsp, get_current_uid(conn),
2959 req ? req->mid : 0, NO_OPLOCK);
2960
2961 /* For directories the delete on close bit at open time seems
2962 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2963 if (create_options & FILE_DELETE_ON_CLOSE) {
2964 status = can_set_delete_on_close(fsp, 0);
2965 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2966 TALLOC_FREE(lck);
2967 fd_close(fsp);
2968 file_free(req, fsp);
2969 return status;
2970 }
2971
2972 if (NT_STATUS_IS_OK(status)) {
2973 /* Note that here we set the *inital* delete on close flag,
2974 not the regular one. The magic gets handled in close. */
2975 fsp->initial_delete_on_close = True;
2976 }
2977 }
2978
2979 TALLOC_FREE(lck);
2980
2981 if (pinfo) {
2982 *pinfo = info;
2983 }
2984
2985 *result = fsp;
2986 return NT_STATUS_OK;
2987 }
2988
2989 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2990 struct smb_filename *smb_dname)
2991 {
2992 NTSTATUS status;
2993 files_struct *fsp;
2994
2995 status = SMB_VFS_CREATE_FILE(
2996 conn, /* conn */
2997 req, /* req */
2998 0, /* root_dir_fid */
2999 smb_dname, /* fname */
3000 FILE_READ_ATTRIBUTES, /* access_mask */
3001 FILE_SHARE_NONE, /* share_access */
3002 FILE_CREATE, /* create_disposition*/
3003 FILE_DIRECTORY_FILE, /* create_options */
3004 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
3005 0, /* oplock_request */
3006 0, /* allocation_size */
3007 0, /* private_flags */
3008 NULL, /* sd */
3009 NULL, /* ea_list */
3010 &fsp, /* result */
3011 NULL); /* pinfo */
3012
3013 if (NT_STATUS_IS_OK(status)) {
3014 close_file(req, fsp, NORMAL_CLOSE);
3015 }
3016
3017 return status;
3018 }
3019
3020 /****************************************************************************
3021 Receive notification that one of our open files has been renamed by another
3022 smbd process.
3023 ****************************************************************************/
3024
3025 void msg_file_was_renamed(struct messaging_context *msg,
3026 void *private_data,
3027 uint32_t msg_type,
3028 struct server_id server_id,
3029 DATA_BLOB *data)
3030 {
3031 files_struct *fsp;
3032 char *frm = (char *)data->data;
3033 struct file_id id;
3034 const char *sharepath;
3035 const char *base_name;
3036 const char *stream_name;
3037 struct smb_filename *smb_fname = NULL;
3038 size_t sp_len, bn_len;
3039 NTSTATUS status;
3040 struct smbd_server_connection *sconn =
3041 talloc_get_type_abort(private_data,
3042 struct smbd_server_connection);
3043
3044 if (data->data == NULL
3045 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3046 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3047 (int)data->length));
3048 return;
3049 }
3050
3051 /* Unpack the message. */
3052 pull_file_id_24(frm, &id);
3053 sharepath = &frm[24];
3054 sp_len = strlen(sharepath);
3055 base_name = sharepath + sp_len + 1;
3056 bn_len = strlen(base_name);
3057 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3058
3059 /* stream_name must always be NULL if there is no stream. */
3060 if (stream_name[0] == '\0') {
3061 stream_name = NULL;
3062 }
3063
3064 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3065 stream_name, NULL, &smb_fname);
3066 if (!NT_STATUS_IS_OK(status)) {
3067 return;
3068 }
3069
3070 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3071 "file_id %s\n",
3072 sharepath, smb_fname_str_dbg(smb_fname),
3073 file_id_string_tos(&id)));
3074
3075 for(fsp = file_find_di_first(sconn, id); fsp;
3076 fsp = file_find_di_next(fsp)) {
3077 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3078
3079 DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
3080 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
3081 smb_fname_str_dbg(smb_fname)));
3082 status = fsp_set_smb_fname(fsp, smb_fname);
3083 if (!NT_STATUS_IS_OK(status)) {
3084 goto out;
3085 }
3086 } else {
3087 /* TODO. JRA. */
3088 /* Now we have the complete path we can work out if this is
3089 actually within this share and adjust newname accordingly. */
3090 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3091 "not sharepath %s) "
3092 "%s from %s -> %s\n",
3093 fsp->conn->connectpath,
3094 sharepath,
3095 fsp_fnum_dbg(fsp),
3096 fsp_str_dbg(fsp),
3097 smb_fname_str_dbg(smb_fname)));
3098 }
3099 }
3100 out:
3101 TALLOC_FREE(smb_fname);
3102 return;
3103 }
3104
3105 /*
3106 * If a main file is opened for delete, all streams need to be checked for
3107 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3108 * If that works, delete them all by setting the delete on close and close.
3109 */
3110
3111 NTSTATUS open_streams_for_delete(connection_struct *conn,
3112 const char *fname)
3113 {
3114 struct stream_struct *stream_info = NULL;
3115 files_struct **streams = NULL;
3116 int i;
3117 unsigned int num_streams = 0;
3118 TALLOC_CTX *frame = talloc_stackframe();
3119 NTSTATUS status;
3120
3121 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3122 &num_streams, &stream_info);
3123
3124 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3125 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3126 DEBUG(10, ("no streams around\n"));
3127 TALLOC_FREE(frame);
3128 return NT_STATUS_OK;
3129 }
3130
3131 if (!NT_STATUS_IS_OK(status)) {
3132 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3133 nt_errstr(status)));
3134 goto fail;
3135 }
3136
3137 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3138 num_streams));
3139
3140 if (num_streams == 0) {
3141 TALLOC_FREE(frame);
3142 return NT_STATUS_OK;
3143 }
3144
3145 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3146 if (streams == NULL) {
3147 DEBUG(0, ("talloc failed\n"));
3148 status = NT_STATUS_NO_MEMORY;
3149 goto fail;
3150 }
3151
3152 for (i=0; i<num_streams; i++) {
3153 struct smb_filename *smb_fname = NULL;
3154
3155 if (strequal(stream_info[i].name, "::$DATA")) {
3156 streams[i] = NULL;
3157 continue;
3158 }
3159
3160 status = create_synthetic_smb_fname(talloc_tos(), fname,
3161 stream_info[i].name,
3162 NULL, &smb_fname);
3163 if (!NT_STATUS_IS_OK(status)) {
3164 goto fail;
3165 }
3166
3167 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3168 DEBUG(10, ("Unable to stat stream: %s\n",
3169 smb_fname_str_dbg(smb_fname)));
3170 }
3171
3172 status = SMB_VFS_CREATE_FILE(
3173 conn, /* conn */
3174 NULL, /* req */
3175 0, /* root_dir_fid */
3176 smb_fname, /* fname */
3177 DELETE_ACCESS, /* access_mask */
3178 (FILE_SHARE_READ | /* share_access */
3179 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3180 FILE_OPEN, /* create_disposition*/
3181 0, /* create_options */
3182 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3183 0, /* oplock_request */
3184 0, /* allocation_size */
3185 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3186 NULL, /* sd */
3187 NULL, /* ea_list */
3188 &streams[i], /* result */
3189 NULL); /* pinfo */
3190
3191 if (!NT_STATUS_IS_OK(status)) {
3192 DEBUG(10, ("Could not open stream %s: %s\n",
3193 smb_fname_str_dbg(smb_fname),
3194 nt_errstr(status)));
3195
3196 TALLOC_FREE(smb_fname);
3197 break;
3198 }
3199 TALLOC_FREE(smb_fname);
3200 }
3201
3202 /*
3203 * don't touch the variable "status" beyond this point :-)
3204 */
3205
3206 for (i -= 1 ; i >= 0; i--) {
3207 if (streams[i] == NULL) {
3208 continue;
3209 }
3210
3211 DEBUG(10, ("Closing stream # %d, %s\n", i,
3212 fsp_str_dbg(streams[i])));
3213 close_file(NULL, streams[i], NORMAL_CLOSE);
3214 }
3215
3216 fail:
3217 TALLOC_FREE(frame);
3218 return status;
3219 }
3220
3221 /*********************************************************************
3222 Create a default ACL by inheriting from the parent. If no inheritance
3223 from the parent available, don't set anything. This will leave the actual
3224 permissions the new file or directory already got from the filesystem
3225 as the NT ACL when read.
3226 *********************************************************************/
3227
3228 static NTSTATUS inherit_new_acl(files_struct *fsp)
3229 {
3230 TALLOC_CTX *ctx = talloc_tos();
3231 char *parent_name = NULL;
3232 struct security_descriptor *parent_desc = NULL;
3233 NTSTATUS status = NT_STATUS_OK;
3234 struct security_descriptor *psd = NULL;
3235 struct dom_sid *owner_sid = NULL;
3236 struct dom_sid *group_sid = NULL;
3237 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3238 bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3239 bool inheritable_components = false;
3240 size_t size = 0;
3241
3242 if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3243 return NT_STATUS_NO_MEMORY;
3244 }
3245
3246 status = SMB_VFS_GET_NT_ACL(fsp->conn,
3247 parent_name,
3248 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3249 &parent_desc);
3250 if (!NT_STATUS_IS_OK(status)) {
3251 return status;
3252 }
3253
3254 inheritable_components = sd_has_inheritable_components(parent_desc,
3255 fsp->is_directory);
3256
3257 if (!inheritable_components && !inherit_owner) {
3258 /* Nothing to inherit and not setting owner. */
3259 return NT_STATUS_OK;
3260 }
3261
3262 /* Create an inherited descriptor from the parent. */
3263
3264 if (DEBUGLEVEL >= 10) {
3265 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3266 fsp_str_dbg(fsp) ));
3267 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3268 }
3269
3270 /* Inherit from parent descriptor if "inherit owner" set. */
3271 if (inherit_owner) {
3272 owner_sid = parent_desc->owner_sid;
3273 group_sid = parent_desc->group_sid;
3274 }
3275
3276 if (owner_sid == NULL) {
3277 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3278 }
3279 if (group_sid == NULL) {
3280 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3281 }
3282
3283 status = se_create_child_secdesc(ctx,
3284 &psd,
3285 &size,
3286 parent_desc,
3287 owner_sid,
3288 group_sid,
3289 fsp->is_directory);
3290 if (!NT_STATUS_IS_OK(status)) {
3291 return status;
3292 }
3293
3294 /* If inheritable_components == false,
3295 se_create_child_secdesc()
3296 creates a security desriptor with a NULL dacl
3297 entry, but with SEC_DESC_DACL_PRESENT. We need
3298 to remove that flag. */
3299
3300 if (!inheritable_components) {
3301 security_info_sent &= ~SECINFO_DACL;
3302 psd->type &= ~SEC_DESC_DACL_PRESENT;
3303 }
3304
3305 if (DEBUGLEVEL >= 10) {
3306 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3307 fsp_str_dbg(fsp) ));
3308 NDR_PRINT_DEBUG(security_descriptor, psd);
3309 }
3310
3311 if (inherit_owner) {
3312 /* We need to be root to force this. */
3313 become_root();
3314 }
3315 status = SMB_VFS_FSET_NT_ACL(fsp,
3316 security_info_sent,
3317 psd);
3318 if (inherit_owner) {
3319 unbecome_root();
3320 }
3321 return status;
3322 }
3323
3324 /*
3325 * Wrapper around open_file_ntcreate and open_directory
3326 */
3327
3328 static NTSTATUS create_file_unixpath(connection_struct *conn,
3329 struct smb_request *req,
3330 struct smb_filename *smb_fname,
3331 uint32_t access_mask,
3332 uint32_t share_access,
3333 uint32_t create_disposition,
3334 uint32_t create_options,
3335 uint32_t file_attributes,
3336 uint32_t oplock_request,
3337 uint64_t allocation_size,
3338 uint32_t private_flags,
3339 struct security_descriptor *sd,
3340 struct ea_list *ea_list,
3341
3342 files_struct **result,
3343 int *pinfo)
3344 {
3345 int info = FILE_WAS_OPENED;
3346 files_struct *base_fsp = NULL;
3347 files_struct *fsp = NULL;
3348 NTSTATUS status;
3349
3350 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3351 "file_attributes = 0x%x, share_access = 0x%x, "
3352 "create_disposition = 0x%x create_options = 0x%x "
3353 "oplock_request = 0x%x private_flags = 0x%x "
3354 "ea_list = 0x%p, sd = 0x%p, "
3355 "fname = %s\n",
3356 (unsigned int)access_mask,
3357 (unsigned int)file_attributes,
3358 (unsigned int)share_access,
3359 (unsigned int)create_disposition,
3360 (unsigned int)create_options,
3361 (unsigned int)oplock_request,
3362 (unsigned int)private_flags,
3363 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3364
3365 if (create_options & FILE_OPEN_BY_FILE_ID) {
3366 status = NT_STATUS_NOT_SUPPORTED;
3367 goto fail;
3368 }
3369
3370 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3371 status = NT_STATUS_INVALID_PARAMETER;
3372 goto fail;
3373 }
3374
3375 if (req == NULL) {
3376 oplock_request |= INTERNAL_OPEN_ONLY;
3377 }
3378
3379 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3380 && (access_mask & DELETE_ACCESS)
3381 && !is_ntfs_stream_smb_fname(smb_fname)) {
3382 /*
3383 * We can't open a file with DELETE access if any of the
3384 * streams is open without FILE_SHARE_DELETE
3385 */
3386 status = open_streams_for_delete(conn, smb_fname->base_name);
3387
3388 if (!NT_STATUS_IS_OK(status)) {
3389 goto fail;
3390 }
3391 }
3392
3393 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3394 !security_token_has_privilege(get_current_nttok(conn),
3395 SEC_PRIV_SECURITY)) {
3396 DEBUG(10, ("create_file_unixpath: open on %s "
3397 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3398 smb_fname_str_dbg(smb_fname)));
3399 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3400 goto fail;
3401 }
3402
3403 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3404 && is_ntfs_stream_smb_fname(smb_fname)
3405 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3406 uint32 base_create_disposition;
3407 struct smb_filename *smb_fname_base = NULL;
3408
3409 if (create_options & FILE_DIRECTORY_FILE) {
3410 status = NT_STATUS_NOT_A_DIRECTORY;
3411 goto fail;
3412 }
3413
3414 switch (create_disposition) {
3415 case FILE_OPEN:
3416 base_create_disposition = FILE_OPEN;
3417 break;
3418 default:
3419 base_create_disposition = FILE_OPEN_IF;
3420 break;
3421 }
3422
3423 /* Create an smb_filename with stream_name == NULL. */
3424 status = create_synthetic_smb_fname(talloc_tos(),
3425 smb_fname->base_name,
3426 NULL, NULL,
3427 &smb_fname_base);
3428 if (!NT_STATUS_IS_OK(status)) {
3429 goto fail;
3430 }
3431
3432 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3433 DEBUG(10, ("Unable to stat stream: %s\n",
3434 smb_fname_str_dbg(smb_fname_base)));
3435 }
3436
3437 /* Open the base file. */
3438 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3439 FILE_SHARE_READ
3440 | FILE_SHARE_WRITE
3441 | FILE_SHARE_DELETE,
3442 base_create_disposition,
3443 0, 0, 0, 0, 0, NULL, NULL,
3444 &base_fsp, NULL);
3445 TALLOC_FREE(smb_fname_base);
3446
3447 if (!NT_STATUS_IS_OK(status)) {
3448 DEBUG(10, ("create_file_unixpath for base %s failed: "
3449 "%s\n", smb_fname->base_name,
3450 nt_errstr(status)));
3451 goto fail;
3452 }
3453 /* we don't need to low level fd */
3454 fd_close(base_fsp);
3455 }
3456
3457 /*
3458 * If it's a request for a directory open, deal with it separately.
3459 */
3460
3461 if (create_options & FILE_DIRECTORY_FILE) {
3462
3463 if (create_options & FILE_NON_DIRECTORY_FILE) {
3464 status = NT_STATUS_INVALID_PARAMETER;
3465 goto fail;
3466 }
3467
3468 /* Can't open a temp directory. IFS kit test. */
3469 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3470 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3471 status = NT_STATUS_INVALID_PARAMETER;
3472 goto fail;
3473 }
3474
3475 /*
3476 * We will get a create directory here if the Win32
3477 * app specified a security descriptor in the
3478 * CreateDirectory() call.
3479 */
3480
3481 oplock_request = 0;
3482 status = open_directory(
3483 conn, req, smb_fname, access_mask, share_access,
3484 create_disposition, create_options, file_attributes,
3485 &info, &fsp);
3486 } else {
3487
3488 /*
3489 * Ordinary file case.
3490 */
3491
3492 status = file_new(req, conn, &fsp);
3493 if(!NT_STATUS_IS_OK(status)) {
3494 goto fail;
3495 }
3496
3497 status = fsp_set_smb_fname(fsp, smb_fname);
3498 if (!NT_STATUS_IS_OK(status)) {
3499 goto fail;
3500 }
3501
3502 /*
3503 * We're opening the stream element of a base_fsp
3504 * we already opened. Set up the base_fsp pointer.
3505 */
3506 if (base_fsp) {
3507 fsp->base_fsp = base_fsp;
3508 }
3509
3510 status = open_file_ntcreate(conn,
3511 req,
3512 access_mask,
3513 share_access,
3514 create_disposition,
3515 create_options,
3516 file_attributes,
3517 oplock_request,
3518 private_flags,
3519 &info,
3520 fsp);
3521
3522 if(!NT_STATUS_IS_OK(status)) {
3523 file_free(req, fsp);
3524 fsp = NULL;
3525 }
3526
3527 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3528
3529 /* A stream open never opens a directory */
3530
3531 if (base_fsp) {
3532 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3533 goto fail;
3534 }
3535
3536 /*
3537 * Fail the open if it was explicitly a non-directory
3538 * file.
3539 */
3540
3541 if (create_options & FILE_NON_DIRECTORY_FILE) {
3542 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3543 goto fail;
3544 }
3545
3546 oplock_request = 0;
3547 status = open_directory(
3548 conn, req, smb_fname, access_mask,
3549 share_access, create_disposition,
3550 create_options, file_attributes,
3551 &info, &fsp);
3552 }
3553 }
3554
3555 if (!NT_STATUS_IS_OK(status)) {
3556 goto fail;
3557 }
3558
3559 fsp->base_fsp = base_fsp;
3560
3561 if ((ea_list != NULL) &&
3562 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3563 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3564 if (!NT_STATUS_IS_OK(status)) {
3565 goto fail;
3566 }
3567 }
3568
3569 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3570 status = NT_STATUS_ACCESS_DENIED;
3571 goto fail;
3572 }
3573
3574 /* Save the requested allocation size. */
3575 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3576 if (allocation_size
3577 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3578 fsp->initial_allocation_size = smb_roundup(
3579 fsp->conn, allocation_size);
3580 if (fsp->is_directory) {
3581 /* Can't set allocation size on a directory. */
3582 status = NT_STATUS_ACCESS_DENIED;
3583 goto fail;
3584 }
3585 if (vfs_allocate_file_space(
3586 fsp, fsp->initial_allocation_size) == -1) {
3587 status = NT_STATUS_DISK_FULL;
3588 goto fail;
3589 }
3590 } else {
3591 fsp->initial_allocation_size = smb_roundup(
3592 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3593 }
3594 }
3595
3596 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3597 fsp->base_fsp == NULL) {
3598 if (sd != NULL) {
3599 /*
3600 * According to the MS documentation, the only time the security
3601 * descriptor is applied to the opened file is iff we *created* the
3602 * file; an existing file stays the same.
3603 *
3604 * Also, it seems (from observation) that you can open the file with
3605 * any access mask but you can still write the sd. We need to override
3606 * the granted access before we call set_sd
3607 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3608 */
3609
3610 uint32_t sec_info_sent;
3611 uint32_t saved_access_mask = fsp->access_mask;
3612
3613 sec_info_sent = get_sec_info(sd);
3614
3615 fsp->access_mask = FILE_GENERIC_ALL;
3616
3617 /* Convert all the generic bits. */
3618 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3619 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3620
3621 if (sec_info_sent & (SECINFO_OWNER|
3622 SECINFO_GROUP|
3623 SECINFO_DACL|
3624 SECINFO_SACL)) {
3625 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3626 }
3627
3628 fsp->access_mask = saved_access_mask;
3629
3630 if (!NT_STATUS_IS_OK(status)) {
3631 goto fail;
3632 }
3633 } else if (lp_inherit_acls(SNUM(conn))) {
3634 /* Inherit from parent. Errors here are not fatal. */
3635 status = inherit_new_acl(fsp);
3636 if (!NT_STATUS_IS_OK(status)) {
3637 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3638 fsp_str_dbg(fsp),
3639 nt_errstr(status) ));
3640 }
3641 }
3642 }
3643
3644 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3645
3646 *result = fsp;
3647 if (pinfo != NULL) {
3648 *pinfo = info;
3649 }
3650
3651 smb_fname->st = fsp->fsp_name->st;
3652
3653 return NT_STATUS_OK;
3654
3655 fail:
3656 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3657
3658 if (fsp != NULL) {
3659 if (base_fsp && fsp->base_fsp == base_fsp) {
3660 /*
3661 * The close_file below will close
3662 * fsp->base_fsp.
3663 */
3664 base_fsp = NULL;
3665 }
3666 close_file(req, fsp, ERROR_CLOSE);
3667 fsp = NULL;
3668 }
3669 if (base_fsp != NULL) {
3670 close_file(req, base_fsp, ERROR_CLOSE);
3671 base_fsp = NULL;
3672 }
3673 return status;
3674 }
3675
3676 /*
3677 * Calculate the full path name given a relative fid.
3678 */
3679 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3680 struct smb_request *req,
3681 uint16_t root_dir_fid,
3682 const struct smb_filename *smb_fname,
3683 struct smb_filename **smb_fname_out)
3684 {
3685 files_struct *dir_fsp;
3686 char *parent_fname = NULL;
3687 char *new_base_name = NULL;
3688 NTSTATUS status;
3689
3690 if (root_dir_fid == 0 || !smb_fname) {
3691 status = NT_STATUS_INTERNAL_ERROR;
3692 goto out;
3693 }
3694
3695 dir_fsp = file_fsp(req, root_dir_fid);
3696
3697 if (dir_fsp == NULL) {
3698 status = NT_STATUS_INVALID_HANDLE;
3699 goto out;
3700 }
3701
3702 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3703 status = NT_STATUS_INVALID_HANDLE;
3704 goto out;
3705 }
3706
3707 if (!dir_fsp->is_directory) {
3708
3709 /*
3710 * Check to see if this is a mac fork of some kind.
3711 */
3712
3713 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3714 is_ntfs_stream_smb_fname(smb_fname)) {
3715 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3716 goto out;
3717 }
3718
3719 /*
3720 we need to handle the case when we get a
3721 relative open relative to a file and the
3722 pathname is blank - this is a reopen!
3723 (hint from demyn plantenberg)
3724 */
3725
3726 status = NT_STATUS_INVALID_HANDLE;
3727 goto out;
3728 }
3729
3730 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3731 /*
3732 * We're at the toplevel dir, the final file name
3733 * must not contain ./, as this is filtered out
3734 * normally by srvstr_get_path and unix_convert
3735 * explicitly rejects paths containing ./.
3736 */
3737 parent_fname = talloc_strdup(talloc_tos(), "");
3738 if (parent_fname == NULL) {
3739 status = NT_STATUS_NO_MEMORY;
3740 goto out;
3741 }
3742 } else {
3743 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3744
3745 /*
3746 * Copy in the base directory name.
3747 */
3748
3749 parent_fname = talloc_array(talloc_tos(), char,
3750 dir_name_len+2);
3751 if (parent_fname == NULL) {
3752 status = NT_STATUS_NO_MEMORY;
3753 goto out;
3754 }
3755 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3756 dir_name_len+1);
3757
3758 /*
3759 * Ensure it ends in a '/'.
3760 * We used TALLOC_SIZE +2 to add space for the '/'.
3761 */
3762
3763 if(dir_name_len
3764 && (parent_fname[dir_name_len-1] != '\\')
3765 && (parent_fname[dir_name_len-1] != '/')) {
3766 parent_fname[dir_name_len] = '/';
3767 parent_fname[dir_name_len+1] = '\0';
3768 }
3769 }
3770
3771 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3772 smb_fname->base_name);
3773 if (new_base_name == NULL) {
3774 status = NT_STATUS_NO_MEMORY;
3775 goto out;
3776 }
3777
3778 status = filename_convert(req,
3779 conn,
3780 req->flags2 & FLAGS2_DFS_PATHNAMES,
3781 new_base_name,
3782 0,
3783 NULL,
3784 smb_fname_out);
3785 if (!NT_STATUS_IS_OK(status)) {
3786 goto out;
3787 }
3788
3789 out:
3790 TALLOC_FREE(parent_fname);
3791 TALLOC_FREE(new_base_name);
3792 return status;
3793 }
3794
3795 NTSTATUS create_file_default(connection_struct *conn,
3796 struct smb_request *req,
3797 uint16_t root_dir_fid,
3798 struct smb_filename *smb_fname,
3799 uint32_t access_mask,
3800 uint32_t share_access,
3801 uint32_t create_disposition,
3802 uint32_t create_options,
3803 uint32_t file_attributes,
3804 uint32_t oplock_request,
3805 uint64_t allocation_size,
3806 uint32_t private_flags,
3807 struct security_descriptor *sd,
3808 struct ea_list *ea_list,
3809 files_struct **result,
3810 int *pinfo)
3811 {
3812 int info = FILE_WAS_OPENED;
3813 files_struct *fsp = NULL;
3814 NTSTATUS status;
3815 bool stream_name = false;
3816
3817 DEBUG(10,("create_file: access_mask = 0x%x "
3818 "file_attributes = 0x%x, share_access = 0x%x, "
3819 "create_disposition = 0x%x create_options = 0x%x "
3820 "oplock_request = 0x%x "
3821 "private_flags = 0x%x "
3822 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3823 "fname = %s\n",
3824 (unsigned int)access_mask,
3825 (unsigned int)file_attributes,
3826 (unsigned int)share_access,
3827 (unsigned int)create_disposition,
3828 (unsigned int)create_options,
3829 (unsigned int)oplock_request,
3830 (unsigned int)private_flags,
3831 (unsigned int)root_dir_fid,
3832 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3833
3834 /*
3835 * Calculate the filename from the root_dir_if if necessary.
3836 */
3837
3838 if (root_dir_fid != 0) {
3839 struct smb_filename *smb_fname_out = NULL;
3840 status = get_relative_fid_filename(conn, req, root_dir_fid,
3841 smb_fname, &smb_fname_out);
3842 if (!NT_STATUS_IS_OK(status)) {
3843 goto fail;
3844 }
3845 smb_fname = smb_fname_out;
3846 }
3847
3848 /*
3849 * Check to see if this is a mac fork of some kind.
3850 */
3851
3852 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3853 if (stream_name) {
3854 enum FAKE_FILE_TYPE fake_file_type;
3855
3856 fake_file_type = is_fake_file(smb_fname);
3857
3858 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3859
3860 /*
3861 * Here we go! support for changing the disk quotas
3862 * --metze
3863 *
3864 * We need to fake up to open this MAGIC QUOTA file
3865 * and return a valid FID.
3866 *
3867 * w2k close this file directly after openening xp
3868 * also tries a QUERY_FILE_INFO on the file and then
3869 * close it
3870 */
3871 status = open_fake_file(req, conn, req->vuid,
3872 fake_file_type, smb_fname,
3873 access_mask, &fsp);
3874 if (!NT_STATUS_IS_OK(status)) {
3875 goto fail;
3876 }
3877
3878 ZERO_STRUCT(smb_fname->st);
3879 goto done;
3880 }
3881
3882 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3883 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3884 goto fail;
3885 }
3886 }
3887
3888 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
3889 int ret;
3890 smb_fname->stream_name = NULL;
3891 /* We have to handle this error here. */
3892 if (create_options & FILE_DIRECTORY_FILE) {
3893 status = NT_STATUS_NOT_A_DIRECTORY;
3894 goto fail;
3895 }
3896 if (lp_posix_pathnames()) {
3897 ret = SMB_VFS_LSTAT(conn, smb_fname);
3898 } else {
3899 ret = SMB_VFS_STAT(conn, smb_fname);
3900 }
3901
3902 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3903 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3904 goto fail;
3905 }
3906 }
3907
3908 status = create_file_unixpath(
3909 conn, req, smb_fname, access_mask, share_access,
3910 create_disposition, create_options, file_attributes,
3911 oplock_request, allocation_size, private_flags,
3912 sd, ea_list,
3913 &fsp, &info);
3914
3915 if (!NT_STATUS_IS_OK(status)) {
3916 goto fail;
3917 }
3918
3919 done:
3920 DEBUG(10, ("create_file: info=%d\n", info));
3921
3922 *result = fsp;
3923 if (pinfo != NULL) {
3924 *pinfo = info;
3925 }
3926 return NT_STATUS_OK;
3927
3928 fail:
3929 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3930
3931 if (fsp != NULL) {
3932 close_file(req, fsp, ERROR_CLOSE);
3933 fsp = NULL;
3934 }
3935 return status;
3936 }
reg import