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Simplify smbd_check_open_rights() and move all the special casing inside it.
[Samba/gebeck_regimport.git] / source3 / smbd / open.c
blob973a5d2b47284efede1daf078bc6b667b4e6035a
1 /*
2 Unix SMB/CIFS implementation.
3 file opening and share modes
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2004
6 Copyright (C) Volker Lendecke 2005
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "system/filesys.h"
24 #include "printing.h"
25 #include "smbd/smbd.h"
26 #include "smbd/globals.h"
27 #include "fake_file.h"
28 #include "../libcli/security/security.h"
29 #include "../librpc/gen_ndr/ndr_security.h"
30 #include "auth.h"
31 #include "messages.h"
32
33 extern const struct generic_mapping file_generic_mapping;
34
35 struct deferred_open_record {
36 bool delayed_for_oplocks;
37 struct file_id id;
38 };
39
40 /****************************************************************************
41 SMB1 file varient of se_access_check. Never test FILE_READ_ATTRIBUTES.
42 ****************************************************************************/
43
44 NTSTATUS smb1_file_se_access_check(struct connection_struct *conn,
45 const struct security_descriptor *sd,
46 const struct security_token *token,
47 uint32_t access_desired,
48 uint32_t *access_granted)
49 {
50 *access_granted = 0;
51
52 if (get_current_uid(conn) == (uid_t)0) {
53 /* I'm sorry sir, I didn't know you were root... */
54 *access_granted = access_desired;
55 if (access_desired & SEC_FLAG_MAXIMUM_ALLOWED) {
56 *access_granted |= FILE_GENERIC_ALL;
57 }
58 return NT_STATUS_OK;
59 }
60
61 return se_access_check(sd,
62 token,
63 (access_desired & ~FILE_READ_ATTRIBUTES),
64 access_granted);
65 }
66
67 /****************************************************************************
68 If the requester wanted DELETE_ACCESS and was only rejected because
69 the file ACL didn't include DELETE_ACCESS, see if the parent ACL
70 ovverrides this.
71 ****************************************************************************/
72
73 static bool parent_override_delete(connection_struct *conn,
74 struct smb_filename *smb_fname,
75 uint32_t access_mask,
76 uint32_t rejected_mask)
77 {
78 if ((access_mask & DELETE_ACCESS) &&
79 (rejected_mask == DELETE_ACCESS) &&
80 can_delete_file_in_directory(conn, smb_fname)) {
81 return true;
82 }
83 return false;
84 }
85
86 /****************************************************************************
87 Check if we have open rights.
88 ****************************************************************************/
89
90 static NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
91 struct smb_filename *smb_fname,
92 uint32_t access_mask)
93 {
94 /* Check if we have rights to open. */
95 NTSTATUS status;
96 struct security_descriptor *sd = NULL;
97 uint32_t rejected_share_access;
98 uint32_t rejected_mask = 0;
99
100 rejected_share_access = access_mask & ~(conn->share_access);
101
102 if (rejected_share_access) {
103 DEBUG(10, ("smbd_check_open_rights: rejected share access 0x%x "
104 "on %s (0x%x)\n",
105 (unsigned int)access_mask,
106 smb_fname_str_dbg(smb_fname),
107 (unsigned int)rejected_share_access ));
108 return NT_STATUS_ACCESS_DENIED;
109 }
110
111 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
112 DEBUG(10,("smbd_check_open_rights: not checking ACL "
113 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
114 smb_fname_str_dbg(smb_fname),
115 (unsigned int)access_mask ));
116 return NT_STATUS_OK;
117 }
118
119 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
120 (SECINFO_OWNER |
121 SECINFO_GROUP |
122 SECINFO_DACL),&sd);
123
124 if (!NT_STATUS_IS_OK(status)) {
125 DEBUG(10, ("smbd_check_open_rights: Could not get acl "
126 "on %s: %s\n",
127 smb_fname_str_dbg(smb_fname),
128 nt_errstr(status)));
129 return status;
130 }
131
132 status = smb1_file_se_access_check(conn,
133 sd,
134 get_current_nttok(conn),
135 access_mask,
136 &rejected_mask);
137
138 DEBUG(10,("smbd_check_open_rights: file %s requesting "
139 "0x%x returning 0x%x (%s)\n",
140 smb_fname_str_dbg(smb_fname),
141 (unsigned int)access_mask,
142 (unsigned int)rejected_mask,
143 nt_errstr(status) ));
144
145 if (!NT_STATUS_IS_OK(status)) {
146 if (DEBUGLEVEL >= 10) {
147 DEBUG(10,("smbd_check_open_rights: acl for %s is:\n",
148 smb_fname_str_dbg(smb_fname) ));
149 NDR_PRINT_DEBUG(security_descriptor, sd);
150 }
151 }
152
153 TALLOC_FREE(sd);
154
155 if (NT_STATUS_IS_OK(status) ||
156 !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
157 return status;
158 }
159
160 /* Here we know status == NT_STATUS_ACCESS_DENIED. */
161 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
162 (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
163 (lp_map_readonly(SNUM(conn)) ||
164 lp_map_archive(SNUM(conn)) ||
165 lp_map_hidden(SNUM(conn)) ||
166 lp_map_system(SNUM(conn)))) {
167 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
168
169 DEBUG(10,("smbd_check_open_rights: "
170 "overrode "
171 "FILE_WRITE_ATTRIBUTES "
172 "on file %s\n",
173 smb_fname_str_dbg(smb_fname)));
174 }
175
176 if (parent_override_delete(conn,
177 smb_fname,
178 access_mask,
179 rejected_mask)) {
180 /* Were we trying to do an open
181 * for delete and didn't get DELETE
182 * access (only) ? Check if the
183 * directory allows DELETE_CHILD.
184 * See here:
185 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
186 * for details. */
187
188 rejected_mask &= ~DELETE_ACCESS;
189
190 DEBUG(10,("smbd_check_open_rights: "
191 "overrode "
192 "DELETE_ACCESS on "
193 "file %s\n",
194 smb_fname_str_dbg(smb_fname)));
195 }
196
197 if (rejected_mask != 0) {
198 return NT_STATUS_ACCESS_DENIED;
199 } else {
200 return NT_STATUS_OK;
201 }
202 }
203
204 static NTSTATUS check_parent_access(struct connection_struct *conn,
205 struct smb_filename *smb_fname,
206 uint32_t access_mask,
207 char **pp_parent_dir,
208 struct security_descriptor **pp_parent_sd)
209 {
210 NTSTATUS status;
211 char *parent_dir = NULL;
212 struct security_descriptor *parent_sd = NULL;
213 uint32_t access_granted = 0;
214
215 if (!parent_dirname(talloc_tos(),
216 smb_fname->base_name,
217 &parent_dir,
218 NULL)) {
219 return NT_STATUS_NO_MEMORY;
220 }
221
222 status = SMB_VFS_GET_NT_ACL(conn,
223 parent_dir,
224 SECINFO_DACL,
225 &parent_sd);
226
227 if (!NT_STATUS_IS_OK(status)) {
228 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
229 "%s with error %s\n",
230 parent_dir,
231 nt_errstr(status)));
232 return status;
233 }
234
235 status = smb1_file_se_access_check(conn,
236 parent_sd,
237 get_current_nttok(conn),
238 access_mask,
239 &access_granted);
240 if(!NT_STATUS_IS_OK(status)) {
241 DEBUG(5,("check_parent_access: access check "
242 "on directory %s for "
243 "path %s for mask 0x%x returned (0x%x) %s\n",
244 parent_dir,
245 smb_fname->base_name,
246 access_mask,
247 access_granted,
248 nt_errstr(status) ));
249 return status;
250 }
251
252 if (pp_parent_dir) {
253 *pp_parent_dir = parent_dir;
254 }
255 if (pp_parent_sd) {
256 *pp_parent_sd = parent_sd;
257 }
258 return NT_STATUS_OK;
259 }
260
261 /****************************************************************************
262 fd support routines - attempt to do a dos_open.
263 ****************************************************************************/
264
265 static NTSTATUS fd_open(struct connection_struct *conn,
266 files_struct *fsp,
267 int flags,
268 mode_t mode)
269 {
270 struct smb_filename *smb_fname = fsp->fsp_name;
271 NTSTATUS status = NT_STATUS_OK;
272
273 #ifdef O_NOFOLLOW
274 /*
275 * Never follow symlinks on a POSIX client. The
276 * client should be doing this.
277 */
278
279 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
280 flags |= O_NOFOLLOW;
281 }
282 #endif
283
284 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
285 if (fsp->fh->fd == -1) {
286 status = map_nt_error_from_unix(errno);
287 if (errno == EMFILE) {
288 static time_t last_warned = 0L;
289
290 if (time((time_t *) NULL) > last_warned) {
291 DEBUG(0,("Too many open files, unable "
292 "to open more! smbd's max "
293 "open files = %d\n",
294 lp_max_open_files()));
295 last_warned = time((time_t *) NULL);
296 }
297 }
298
299 }
300
301 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
302 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
303 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
304
305 return status;
306 }
307
308 /****************************************************************************
309 Close the file associated with a fsp.
310 ****************************************************************************/
311
312 NTSTATUS fd_close(files_struct *fsp)
313 {
314 int ret;
315
316 if (fsp->dptr) {
317 dptr_CloseDir(fsp);
318 }
319 if (fsp->fh->fd == -1) {
320 return NT_STATUS_OK; /* What we used to call a stat open. */
321 }
322 if (fsp->fh->ref_count > 1) {
323 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
324 }
325
326 ret = SMB_VFS_CLOSE(fsp);
327 fsp->fh->fd = -1;
328 if (ret == -1) {
329 return map_nt_error_from_unix(errno);
330 }
331 return NT_STATUS_OK;
332 }
333
334 /****************************************************************************
335 Change the ownership of a file to that of the parent directory.
336 Do this by fd if possible.
337 ****************************************************************************/
338
339 void change_file_owner_to_parent(connection_struct *conn,
340 const char *inherit_from_dir,
341 files_struct *fsp)
342 {
343 struct smb_filename *smb_fname_parent = NULL;
344 NTSTATUS status;
345 int ret;
346
347 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
348 NULL, NULL, &smb_fname_parent);
349 if (!NT_STATUS_IS_OK(status)) {
350 return;
351 }
352
353 ret = SMB_VFS_STAT(conn, smb_fname_parent);
354 if (ret == -1) {
355 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
356 "directory %s. Error was %s\n",
357 smb_fname_str_dbg(smb_fname_parent),
358 strerror(errno)));
359 TALLOC_FREE(smb_fname_parent);
360 return;
361 }
362
363 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
364 /* Already this uid - no need to change. */
365 DEBUG(10,("change_file_owner_to_parent: file %s "
366 "is already owned by uid %d\n",
367 fsp_str_dbg(fsp),
368 (int)fsp->fsp_name->st.st_ex_uid ));
369 TALLOC_FREE(smb_fname_parent);
370 return;
371 }
372
373 become_root();
374 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
375 unbecome_root();
376 if (ret == -1) {
377 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
378 "file %s to parent directory uid %u. Error "
379 "was %s\n", fsp_str_dbg(fsp),
380 (unsigned int)smb_fname_parent->st.st_ex_uid,
381 strerror(errno) ));
382 } else {
383 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
384 "parent directory uid %u.\n", fsp_str_dbg(fsp),
385 (unsigned int)smb_fname_parent->st.st_ex_uid));
386 /* Ensure the uid entry is updated. */
387 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
388 }
389
390 TALLOC_FREE(smb_fname_parent);
391 }
392
393 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
394 const char *inherit_from_dir,
395 const char *fname,
396 SMB_STRUCT_STAT *psbuf)
397 {
398 struct smb_filename *smb_fname_parent = NULL;
399 struct smb_filename *smb_fname_cwd = NULL;
400 char *saved_dir = NULL;
401 TALLOC_CTX *ctx = talloc_tos();
402 NTSTATUS status = NT_STATUS_OK;
403 int ret;
404
405 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
406 &smb_fname_parent);
407 if (!NT_STATUS_IS_OK(status)) {
408 return status;
409 }
410
411 ret = SMB_VFS_STAT(conn, smb_fname_parent);
412 if (ret == -1) {
413 status = map_nt_error_from_unix(errno);
414 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
415 "directory %s. Error was %s\n",
416 smb_fname_str_dbg(smb_fname_parent),
417 strerror(errno)));
418 goto out;
419 }
420
421 /* We've already done an lstat into psbuf, and we know it's a
422 directory. If we can cd into the directory and the dev/ino
423 are the same then we can safely chown without races as
424 we're locking the directory in place by being in it. This
425 should work on any UNIX (thanks tridge :-). JRA.
426 */
427
428 saved_dir = vfs_GetWd(ctx,conn);
429 if (!saved_dir) {
430 status = map_nt_error_from_unix(errno);
431 DEBUG(0,("change_dir_owner_to_parent: failed to get "
432 "current working directory. Error was %s\n",
433 strerror(errno)));
434 goto out;
435 }
436
437 /* Chdir into the new path. */
438 if (vfs_ChDir(conn, fname) == -1) {
439 status = map_nt_error_from_unix(errno);
440 DEBUG(0,("change_dir_owner_to_parent: failed to change "
441 "current working directory to %s. Error "
442 "was %s\n", fname, strerror(errno) ));
443 goto chdir;
444 }
445
446 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
447 &smb_fname_cwd);
448 if (!NT_STATUS_IS_OK(status)) {
449 return status;
450 }
451
452 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
453 if (ret == -1) {
454 status = map_nt_error_from_unix(errno);
455 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
456 "directory '.' (%s) Error was %s\n",
457 fname, strerror(errno)));
458 goto chdir;
459 }
460
461 /* Ensure we're pointing at the same place. */
462 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
463 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
464 DEBUG(0,("change_dir_owner_to_parent: "
465 "device/inode on directory %s changed. "
466 "Refusing to chown !\n", fname ));
467 status = NT_STATUS_ACCESS_DENIED;
468 goto chdir;
469 }
470
471 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
472 /* Already this uid - no need to change. */
473 DEBUG(10,("change_dir_owner_to_parent: directory %s "
474 "is already owned by uid %d\n",
475 fname,
476 (int)smb_fname_cwd->st.st_ex_uid ));
477 status = NT_STATUS_OK;
478 goto chdir;
479 }
480
481 become_root();
482 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
483 (gid_t)-1);
484 unbecome_root();
485 if (ret == -1) {
486 status = map_nt_error_from_unix(errno);
487 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
488 "directory %s to parent directory uid %u. "
489 "Error was %s\n", fname,
490 (unsigned int)smb_fname_parent->st.st_ex_uid,
491 strerror(errno) ));
492 } else {
493 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
494 "directory %s to parent directory uid %u.\n",
495 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
496 /* Ensure the uid entry is updated. */
497 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
498 }
499
500 chdir:
501 vfs_ChDir(conn,saved_dir);
502 out:
503 TALLOC_FREE(smb_fname_parent);
504 TALLOC_FREE(smb_fname_cwd);
505 return status;
506 }
507
508 /****************************************************************************
509 Open a file.
510 ****************************************************************************/
511
512 static NTSTATUS open_file(files_struct *fsp,
513 connection_struct *conn,
514 struct smb_request *req,
515 const char *parent_dir,
516 int flags,
517 mode_t unx_mode,
518 uint32 access_mask, /* client requested access mask. */
519 uint32 open_access_mask) /* what we're actually using in the open. */
520 {
521 struct smb_filename *smb_fname = fsp->fsp_name;
522 NTSTATUS status = NT_STATUS_OK;
523 int accmode = (flags & O_ACCMODE);
524 int local_flags = flags;
525 bool file_existed = VALID_STAT(fsp->fsp_name->st);
526 bool file_created = false;
527
528 fsp->fh->fd = -1;
529 errno = EPERM;
530
531 /* Check permissions */
532
533 /*
534 * This code was changed after seeing a client open request
535 * containing the open mode of (DENY_WRITE/read-only) with
536 * the 'create if not exist' bit set. The previous code
537 * would fail to open the file read only on a read-only share
538 * as it was checking the flags parameter directly against O_RDONLY,
539 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
540 * JRA.
541 */
542
543 if (!CAN_WRITE(conn)) {
544 /* It's a read-only share - fail if we wanted to write. */
545 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
546 DEBUG(3,("Permission denied opening %s\n",
547 smb_fname_str_dbg(smb_fname)));
548 return NT_STATUS_ACCESS_DENIED;
549 } else if(flags & O_CREAT) {
550 /* We don't want to write - but we must make sure that
551 O_CREAT doesn't create the file if we have write
552 access into the directory.
553 */
554 flags &= ~(O_CREAT|O_EXCL);
555 local_flags &= ~(O_CREAT|O_EXCL);
556 }
557 }
558
559 /*
560 * This little piece of insanity is inspired by the
561 * fact that an NT client can open a file for O_RDONLY,
562 * but set the create disposition to FILE_EXISTS_TRUNCATE.
563 * If the client *can* write to the file, then it expects to
564 * truncate the file, even though it is opening for readonly.
565 * Quicken uses this stupid trick in backup file creation...
566 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
567 * for helping track this one down. It didn't bite us in 2.0.x
568 * as we always opened files read-write in that release. JRA.
569 */
570
571 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
572 DEBUG(10,("open_file: truncate requested on read-only open "
573 "for file %s\n", smb_fname_str_dbg(smb_fname)));
574 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
575 }
576
577 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
578 (!file_existed && (local_flags & O_CREAT)) ||
579 ((local_flags & O_TRUNC) == O_TRUNC) ) {
580 const char *wild;
581
582 /*
583 * We can't actually truncate here as the file may be locked.
584 * open_file_ntcreate will take care of the truncate later. JRA.
585 */
586
587 local_flags &= ~O_TRUNC;
588
589 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
590 /*
591 * We would block on opening a FIFO with no one else on the
592 * other end. Do what we used to do and add O_NONBLOCK to the
593 * open flags. JRA.
594 */
595
596 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
597 local_flags |= O_NONBLOCK;
598 }
599 #endif
600
601 /* Don't create files with Microsoft wildcard characters. */
602 if (fsp->base_fsp) {
603 /*
604 * wildcard characters are allowed in stream names
605 * only test the basefilename
606 */
607 wild = fsp->base_fsp->fsp_name->base_name;
608 } else {
609 wild = smb_fname->base_name;
610 }
611 if ((local_flags & O_CREAT) && !file_existed &&
612 ms_has_wild(wild)) {
613 return NT_STATUS_OBJECT_NAME_INVALID;
614 }
615
616 /* Actually do the open */
617 status = fd_open(conn, fsp, local_flags, unx_mode);
618 if (!NT_STATUS_IS_OK(status)) {
619 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
620 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
621 nt_errstr(status),local_flags,flags));
622 return status;
623 }
624
625 if ((local_flags & O_CREAT) && !file_existed) {
626 file_created = true;
627 }
628
629 } else {
630 fsp->fh->fd = -1; /* What we used to call a stat open. */
631 if (!file_existed) {
632 /* File must exist for a stat open. */
633 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
634 }
635
636 status = smbd_check_open_rights(conn,
637 smb_fname,
638 access_mask);
639
640 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
641 fsp->posix_open &&
642 S_ISLNK(smb_fname->st.st_ex_mode)) {
643 /* This is a POSIX stat open for delete
644 * or rename on a symlink that points
645 * nowhere. Allow. */
646 DEBUG(10,("open_file: allowing POSIX "
647 "open on bad symlink %s\n",
648 smb_fname_str_dbg(smb_fname)));
649 status = NT_STATUS_OK;
650 }
651
652 if (!NT_STATUS_IS_OK(status)) {
653 DEBUG(10,("open_file: "
654 "smbd_check_open_rights on file "
655 "%s returned %s\n",
656 smb_fname_str_dbg(smb_fname),
657 nt_errstr(status) ));
658 return status;
659 }
660 }
661
662 if (!file_existed) {
663 int ret;
664
665 if (fsp->fh->fd == -1) {
666 ret = SMB_VFS_STAT(conn, smb_fname);
667 } else {
668 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
669 /* If we have an fd, this stat should succeed. */
670 if (ret == -1) {
671 DEBUG(0,("Error doing fstat on open file %s "
672 "(%s)\n",
673 smb_fname_str_dbg(smb_fname),
674 strerror(errno) ));
675 }
676 }
677
678 /* For a non-io open, this stat failing means file not found. JRA */
679 if (ret == -1) {
680 status = map_nt_error_from_unix(errno);
681 fd_close(fsp);
682 return status;
683 }
684
685 if (file_created) {
686 bool need_re_stat = false;
687 /* Do all inheritance work after we've
688 done a successful stat call and filled
689 in the stat struct in fsp->fsp_name. */
690
691 /* Inherit the ACL if required */
692 if (lp_inherit_perms(SNUM(conn))) {
693 inherit_access_posix_acl(conn, parent_dir,
694 smb_fname->base_name,
695 unx_mode);
696 need_re_stat = true;
697 }
698
699 /* Change the owner if required. */
700 if (lp_inherit_owner(SNUM(conn))) {
701 change_file_owner_to_parent(conn, parent_dir,
702 fsp);
703 need_re_stat = true;
704 }
705
706 if (need_re_stat) {
707 if (fsp->fh->fd == -1) {
708 ret = SMB_VFS_STAT(conn, smb_fname);
709 } else {
710 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
711 /* If we have an fd, this stat should succeed. */
712 if (ret == -1) {
713 DEBUG(0,("Error doing fstat on open file %s "
714 "(%s)\n",
715 smb_fname_str_dbg(smb_fname),
716 strerror(errno) ));
717 }
718 }
719 }
720
721 notify_fname(conn, NOTIFY_ACTION_ADDED,
722 FILE_NOTIFY_CHANGE_FILE_NAME,
723 smb_fname->base_name);
724 }
725 }
726
727 /*
728 * POSIX allows read-only opens of directories. We don't
729 * want to do this (we use a different code path for this)
730 * so catch a directory open and return an EISDIR. JRA.
731 */
732
733 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
734 fd_close(fsp);
735 errno = EISDIR;
736 return NT_STATUS_FILE_IS_A_DIRECTORY;
737 }
738
739 fsp->mode = smb_fname->st.st_ex_mode;
740 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
741 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
742 fsp->file_pid = req ? req->smbpid : 0;
743 fsp->can_lock = True;
744 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
745 if (!CAN_WRITE(conn)) {
746 fsp->can_write = False;
747 } else {
748 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
749 True : False;
750 }
751 fsp->print_file = NULL;
752 fsp->modified = False;
753 fsp->sent_oplock_break = NO_BREAK_SENT;
754 fsp->is_directory = False;
755 if (conn->aio_write_behind_list &&
756 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
757 conn->case_sensitive)) {
758 fsp->aio_write_behind = True;
759 }
760
761 fsp->wcp = NULL; /* Write cache pointer. */
762
763 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
764 conn->session_info->unix_info->unix_name,
765 smb_fname_str_dbg(smb_fname),
766 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
767 conn->num_files_open));
768
769 errno = 0;
770 return NT_STATUS_OK;
771 }
772
773 /****************************************************************************
774 Check if we can open a file with a share mode.
775 Returns True if conflict, False if not.
776 ****************************************************************************/
777
778 static bool share_conflict(struct share_mode_entry *entry,
779 uint32 access_mask,
780 uint32 share_access)
781 {
782 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
783 "entry->share_access = 0x%x, "
784 "entry->private_options = 0x%x\n",
785 (unsigned int)entry->access_mask,
786 (unsigned int)entry->share_access,
787 (unsigned int)entry->private_options));
788
789 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
790 (unsigned int)access_mask, (unsigned int)share_access));
791
792 if ((entry->access_mask & (FILE_WRITE_DATA|
793 FILE_APPEND_DATA|
794 FILE_READ_DATA|
795 FILE_EXECUTE|
796 DELETE_ACCESS)) == 0) {
797 DEBUG(10,("share_conflict: No conflict due to "
798 "entry->access_mask = 0x%x\n",
799 (unsigned int)entry->access_mask ));
800 return False;
801 }
802
803 if ((access_mask & (FILE_WRITE_DATA|
804 FILE_APPEND_DATA|
805 FILE_READ_DATA|
806 FILE_EXECUTE|
807 DELETE_ACCESS)) == 0) {
808 DEBUG(10,("share_conflict: No conflict due to "
809 "access_mask = 0x%x\n",
810 (unsigned int)access_mask ));
811 return False;
812 }
813
814 #if 1 /* JRA TEST - Superdebug. */
815 #define CHECK_MASK(num, am, right, sa, share) \
816 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
817 (unsigned int)(num), (unsigned int)(am), \
818 (unsigned int)(right), (unsigned int)(am)&(right) )); \
819 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
820 (unsigned int)(num), (unsigned int)(sa), \
821 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
822 if (((am) & (right)) && !((sa) & (share))) { \
823 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
824 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
825 (unsigned int)(share) )); \
826 return True; \
827 }
828 #else
829 #define CHECK_MASK(num, am, right, sa, share) \
830 if (((am) & (right)) && !((sa) & (share))) { \
831 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
832 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
833 (unsigned int)(share) )); \
834 return True; \
835 }
836 #endif
837
838 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
839 share_access, FILE_SHARE_WRITE);
840 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
841 entry->share_access, FILE_SHARE_WRITE);
842
843 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
844 share_access, FILE_SHARE_READ);
845 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
846 entry->share_access, FILE_SHARE_READ);
847
848 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
849 share_access, FILE_SHARE_DELETE);
850 CHECK_MASK(6, access_mask, DELETE_ACCESS,
851 entry->share_access, FILE_SHARE_DELETE);
852
853 DEBUG(10,("share_conflict: No conflict.\n"));
854 return False;
855 }
856
857 #if defined(DEVELOPER)
858 static void validate_my_share_entries(struct smbd_server_connection *sconn,
859 int num,
860 struct share_mode_entry *share_entry)
861 {
862 files_struct *fsp;
863
864 if (!procid_is_me(&share_entry->pid)) {
865 return;
866 }
867
868 if (is_deferred_open_entry(share_entry) &&
869 !open_was_deferred(sconn, share_entry->op_mid)) {
870 char *str = talloc_asprintf(talloc_tos(),
871 "Got a deferred entry without a request: "
872 "PANIC: %s\n",
873 share_mode_str(talloc_tos(), num, share_entry));
874 smb_panic(str);
875 }
876
877 if (!is_valid_share_mode_entry(share_entry)) {
878 return;
879 }
880
881 fsp = file_find_dif(sconn, share_entry->id,
882 share_entry->share_file_id);
883 if (!fsp) {
884 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
885 share_mode_str(talloc_tos(), num, share_entry) ));
886 smb_panic("validate_my_share_entries: Cannot match a "
887 "share entry with an open file\n");
888 }
889
890 if (is_deferred_open_entry(share_entry) ||
891 is_unused_share_mode_entry(share_entry)) {
892 goto panic;
893 }
894
895 if ((share_entry->op_type == NO_OPLOCK) &&
896 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
897 /* Someone has already written to it, but I haven't yet
898 * noticed */
899 return;
900 }
901
902 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
903 goto panic;
904 }
905
906 return;
907
908 panic:
909 {
910 char *str;
911 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
912 share_mode_str(talloc_tos(), num, share_entry) ));
913 str = talloc_asprintf(talloc_tos(),
914 "validate_my_share_entries: "
915 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
916 fsp->fsp_name->base_name,
917 (unsigned int)fsp->oplock_type,
918 (unsigned int)share_entry->op_type );
919 smb_panic(str);
920 }
921 }
922 #endif
923
924 bool is_stat_open(uint32 access_mask)
925 {
926 return (access_mask &&
927 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
928 FILE_WRITE_ATTRIBUTES))==0) &&
929 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
930 FILE_WRITE_ATTRIBUTES)) != 0));
931 }
932
933 /****************************************************************************
934 Deal with share modes
935 Invarient: Share mode must be locked on entry and exit.
936 Returns -1 on error, or number of share modes on success (may be zero).
937 ****************************************************************************/
938
939 static NTSTATUS open_mode_check(connection_struct *conn,
940 struct share_mode_lock *lck,
941 uint32_t name_hash,
942 uint32 access_mask,
943 uint32 share_access,
944 uint32 create_options,
945 bool *file_existed)
946 {
947 int i;
948
949 if(lck->num_share_modes == 0) {
950 return NT_STATUS_OK;
951 }
952
953 *file_existed = True;
954
955 /* A delete on close prohibits everything */
956
957 if (is_delete_on_close_set(lck, name_hash)) {
958 return NT_STATUS_DELETE_PENDING;
959 }
960
961 if (is_stat_open(access_mask)) {
962 /* Stat open that doesn't trigger oplock breaks or share mode
963 * checks... ! JRA. */
964 return NT_STATUS_OK;
965 }
966
967 /*
968 * Check if the share modes will give us access.
969 */
970
971 #if defined(DEVELOPER)
972 for(i = 0; i < lck->num_share_modes; i++) {
973 validate_my_share_entries(conn->sconn, i,
974 &lck->share_modes[i]);
975 }
976 #endif
977
978 if (!lp_share_modes(SNUM(conn))) {
979 return NT_STATUS_OK;
980 }
981
982 /* Now we check the share modes, after any oplock breaks. */
983 for(i = 0; i < lck->num_share_modes; i++) {
984
985 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
986 continue;
987 }
988
989 /* someone else has a share lock on it, check to see if we can
990 * too */
991 if (share_conflict(&lck->share_modes[i],
992 access_mask, share_access)) {
993 return NT_STATUS_SHARING_VIOLATION;
994 }
995 }
996
997 return NT_STATUS_OK;
998 }
999
1000 static bool is_delete_request(files_struct *fsp) {
1001 return ((fsp->access_mask == DELETE_ACCESS) &&
1002 (fsp->oplock_type == NO_OPLOCK));
1003 }
1004
1005 /*
1006 * Send a break message to the oplock holder and delay the open for
1007 * our client.
1008 */
1009
1010 static NTSTATUS send_break_message(files_struct *fsp,
1011 struct share_mode_entry *exclusive,
1012 uint64_t mid,
1013 int oplock_request)
1014 {
1015 NTSTATUS status;
1016 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1017
1018 DEBUG(10, ("Sending break request to PID %s\n",
1019 procid_str_static(&exclusive->pid)));
1020 exclusive->op_mid = mid;
1021
1022 /* Create the message. */
1023 share_mode_entry_to_message(msg, exclusive);
1024
1025 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1026 don't want this set in the share mode struct pointed to by lck. */
1027
1028 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1029 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1030 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1031 }
1032
1033 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1034 MSG_SMB_BREAK_REQUEST,
1035 (uint8 *)msg,
1036 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1037 if (!NT_STATUS_IS_OK(status)) {
1038 DEBUG(3, ("Could not send oplock break message: %s\n",
1039 nt_errstr(status)));
1040 }
1041
1042 return status;
1043 }
1044
1045 /*
1046 * Return share_mode_entry pointers for :
1047 * 1). Batch oplock entry.
1048 * 2). Batch or exclusive oplock entry (may be identical to #1).
1049 * bool have_level2_oplock
1050 * bool have_no_oplock.
1051 * Do internal consistency checks on the share mode for a file.
1052 */
1053
1054 static void find_oplock_types(files_struct *fsp,
1055 int oplock_request,
1056 struct share_mode_lock *lck,
1057 struct share_mode_entry **pp_batch,
1058 struct share_mode_entry **pp_ex_or_batch,
1059 bool *got_level2,
1060 bool *got_no_oplock)
1061 {
1062 int i;
1063
1064 *pp_batch = NULL;
1065 *pp_ex_or_batch = NULL;
1066 *got_level2 = false;
1067 *got_no_oplock = false;
1068
1069 /* Ignore stat or internal opens, as is done in
1070 delay_for_batch_oplocks() and
1071 delay_for_exclusive_oplocks().
1072 */
1073 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1074 return;
1075 }
1076
1077 for (i=0; i<lck->num_share_modes; i++) {
1078 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1079 continue;
1080 }
1081
1082 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1083 is_stat_open(lck->share_modes[i].access_mask)) {
1084 /* We ignore stat opens in the table - they
1085 always have NO_OPLOCK and never get or
1086 cause breaks. JRA. */
1087 continue;
1088 }
1089
1090 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1091 /* batch - can only be one. */
1092 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1093 smb_panic("Bad batch oplock entry.");
1094 }
1095 *pp_batch = &lck->share_modes[i];
1096 }
1097
1098 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1099 /* Exclusive or batch - can only be one. */
1100 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1101 smb_panic("Bad exclusive or batch oplock entry.");
1102 }
1103 *pp_ex_or_batch = &lck->share_modes[i];
1104 }
1105
1106 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1107 if (*pp_batch || *pp_ex_or_batch) {
1108 smb_panic("Bad levelII oplock entry.");
1109 }
1110 *got_level2 = true;
1111 }
1112
1113 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1114 if (*pp_batch || *pp_ex_or_batch) {
1115 smb_panic("Bad no oplock entry.");
1116 }
1117 *got_no_oplock = true;
1118 }
1119 }
1120 }
1121
1122 static bool delay_for_batch_oplocks(files_struct *fsp,
1123 uint64_t mid,
1124 int oplock_request,
1125 struct share_mode_entry *batch_entry)
1126 {
1127 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1128 return false;
1129 }
1130
1131 if (batch_entry != NULL) {
1132 /* Found a batch oplock */
1133 send_break_message(fsp, batch_entry, mid, oplock_request);
1134 return true;
1135 }
1136 return false;
1137 }
1138
1139 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1140 uint64_t mid,
1141 int oplock_request,
1142 struct share_mode_entry *ex_entry)
1143 {
1144 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1145 return false;
1146 }
1147
1148 if (ex_entry != NULL) {
1149 /* Found an exclusive or batch oplock */
1150 bool delay_it = is_delete_request(fsp) ?
1151 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1152 if (delay_it) {
1153 send_break_message(fsp, ex_entry, mid, oplock_request);
1154 return true;
1155 }
1156 }
1157 return false;
1158 }
1159
1160 static void grant_fsp_oplock_type(files_struct *fsp,
1161 const struct byte_range_lock *br_lck,
1162 int oplock_request,
1163 bool got_level2_oplock,
1164 bool got_a_none_oplock)
1165 {
1166 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1167 lp_level2_oplocks(SNUM(fsp->conn));
1168
1169 /* Start by granting what the client asked for,
1170 but ensure no SAMBA_PRIVATE bits can be set. */
1171 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1172
1173 if (oplock_request & INTERNAL_OPEN_ONLY) {
1174 /* No oplocks on internal open. */
1175 fsp->oplock_type = NO_OPLOCK;
1176 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1177 fsp->oplock_type, fsp_str_dbg(fsp)));
1178 return;
1179 } else if (br_lck && br_lck->num_locks > 0) {
1180 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1181 fsp_str_dbg(fsp)));
1182 fsp->oplock_type = NO_OPLOCK;
1183 }
1184
1185 if (is_stat_open(fsp->access_mask)) {
1186 /* Leave the value already set. */
1187 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1188 fsp->oplock_type, fsp_str_dbg(fsp)));
1189 return;
1190 }
1191
1192 /*
1193 * Match what was requested (fsp->oplock_type) with
1194 * what was found in the existing share modes.
1195 */
1196
1197 if (got_a_none_oplock) {
1198 fsp->oplock_type = NO_OPLOCK;
1199 } else if (got_level2_oplock) {
1200 if (fsp->oplock_type == NO_OPLOCK ||
1201 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1202 /* Store a level2 oplock, but don't tell the client */
1203 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1204 } else {
1205 fsp->oplock_type = LEVEL_II_OPLOCK;
1206 }
1207 } else {
1208 /* All share_mode_entries are placeholders or deferred.
1209 * Silently upgrade to fake levelII if the client didn't
1210 * ask for an oplock. */
1211 if (fsp->oplock_type == NO_OPLOCK) {
1212 /* Store a level2 oplock, but don't tell the client */
1213 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1214 }
1215 }
1216
1217 /*
1218 * Don't grant level2 to clients that don't want them
1219 * or if we've turned them off.
1220 */
1221 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1222 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1223 }
1224
1225 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1226 fsp->oplock_type, fsp_str_dbg(fsp)));
1227 }
1228
1229 bool request_timed_out(struct timeval request_time,
1230 struct timeval timeout)
1231 {
1232 struct timeval now, end_time;
1233 GetTimeOfDay(&now);
1234 end_time = timeval_sum(&request_time, &timeout);
1235 return (timeval_compare(&end_time, &now) < 0);
1236 }
1237
1238 /****************************************************************************
1239 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1240 ****************************************************************************/
1241
1242 static void defer_open(struct share_mode_lock *lck,
1243 struct timeval request_time,
1244 struct timeval timeout,
1245 struct smb_request *req,
1246 struct deferred_open_record *state)
1247 {
1248 int i;
1249
1250 /* Paranoia check */
1251
1252 for (i=0; i<lck->num_share_modes; i++) {
1253 struct share_mode_entry *e = &lck->share_modes[i];
1254
1255 if (!is_deferred_open_entry(e)) {
1256 continue;
1257 }
1258
1259 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1260 DEBUG(0, ("Trying to defer an already deferred "
1261 "request: mid=%llu, exiting\n",
1262 (unsigned long long)req->mid));
1263 exit_server("attempt to defer a deferred request");
1264 }
1265 }
1266
1267 /* End paranoia check */
1268
1269 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1270 "open entry for mid %llu\n",
1271 (unsigned int)request_time.tv_sec,
1272 (unsigned int)request_time.tv_usec,
1273 (unsigned long long)req->mid));
1274
1275 if (!push_deferred_open_message_smb(req, request_time, timeout,
1276 state->id, (char *)state, sizeof(*state))) {
1277 exit_server("push_deferred_open_message_smb failed");
1278 }
1279 add_deferred_open(lck, req->mid, request_time,
1280 sconn_server_id(req->sconn), state->id);
1281 }
1282
1283
1284 /****************************************************************************
1285 On overwrite open ensure that the attributes match.
1286 ****************************************************************************/
1287
1288 bool open_match_attributes(connection_struct *conn,
1289 uint32 old_dos_attr,
1290 uint32 new_dos_attr,
1291 mode_t existing_unx_mode,
1292 mode_t new_unx_mode,
1293 mode_t *returned_unx_mode)
1294 {
1295 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1296
1297 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1298 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1299
1300 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1301 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1302 *returned_unx_mode = new_unx_mode;
1303 } else {
1304 *returned_unx_mode = (mode_t)0;
1305 }
1306
1307 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1308 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1309 "returned_unx_mode = 0%o\n",
1310 (unsigned int)old_dos_attr,
1311 (unsigned int)existing_unx_mode,
1312 (unsigned int)new_dos_attr,
1313 (unsigned int)*returned_unx_mode ));
1314
1315 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1316 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1317 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1318 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1319 return False;
1320 }
1321 }
1322 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1323 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1324 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1325 return False;
1326 }
1327 }
1328 return True;
1329 }
1330
1331 /****************************************************************************
1332 Special FCB or DOS processing in the case of a sharing violation.
1333 Try and find a duplicated file handle.
1334 ****************************************************************************/
1335
1336 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1337 connection_struct *conn,
1338 files_struct *fsp_to_dup_into,
1339 const struct smb_filename *smb_fname,
1340 struct file_id id,
1341 uint16 file_pid,
1342 uint16 vuid,
1343 uint32 access_mask,
1344 uint32 share_access,
1345 uint32 create_options)
1346 {
1347 files_struct *fsp;
1348
1349 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1350 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1351
1352 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1353 fsp = file_find_di_next(fsp)) {
1354
1355 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1356 "vuid = %u, file_pid = %u, private_options = 0x%x "
1357 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1358 fsp->fh->fd, (unsigned int)fsp->vuid,
1359 (unsigned int)fsp->file_pid,
1360 (unsigned int)fsp->fh->private_options,
1361 (unsigned int)fsp->access_mask ));
1362
1363 if (fsp->fh->fd != -1 &&
1364 fsp->vuid == vuid &&
1365 fsp->file_pid == file_pid &&
1366 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1367 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1368 (fsp->access_mask & FILE_WRITE_DATA) &&
1369 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1370 strequal(fsp->fsp_name->stream_name,
1371 smb_fname->stream_name)) {
1372 DEBUG(10,("fcb_or_dos_open: file match\n"));
1373 break;
1374 }
1375 }
1376
1377 if (!fsp) {
1378 return NT_STATUS_NOT_FOUND;
1379 }
1380
1381 /* quite an insane set of semantics ... */
1382 if (is_executable(smb_fname->base_name) &&
1383 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1384 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1385 return NT_STATUS_INVALID_PARAMETER;
1386 }
1387
1388 /* We need to duplicate this fsp. */
1389 return dup_file_fsp(req, fsp, access_mask, share_access,
1390 create_options, fsp_to_dup_into);
1391 }
1392
1393 static void schedule_defer_open(struct share_mode_lock *lck,
1394 struct timeval request_time,
1395 struct smb_request *req)
1396 {
1397 struct deferred_open_record state;
1398
1399 /* This is a relative time, added to the absolute
1400 request_time value to get the absolute timeout time.
1401 Note that if this is the second or greater time we enter
1402 this codepath for this particular request mid then
1403 request_time is left as the absolute time of the *first*
1404 time this request mid was processed. This is what allows
1405 the request to eventually time out. */
1406
1407 struct timeval timeout;
1408
1409 /* Normally the smbd we asked should respond within
1410 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1411 * the client did, give twice the timeout as a safety
1412 * measure here in case the other smbd is stuck
1413 * somewhere else. */
1414
1415 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1416
1417 /* Nothing actually uses state.delayed_for_oplocks
1418 but it's handy to differentiate in debug messages
1419 between a 30 second delay due to oplock break, and
1420 a 1 second delay for share mode conflicts. */
1421
1422 state.delayed_for_oplocks = True;
1423 state.id = lck->id;
1424
1425 if (!request_timed_out(request_time, timeout)) {
1426 defer_open(lck, request_time, timeout, req, &state);
1427 }
1428 }
1429
1430 /****************************************************************************
1431 Work out what access_mask to use from what the client sent us.
1432 ****************************************************************************/
1433
1434 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1435 const struct smb_filename *smb_fname,
1436 bool file_existed,
1437 uint32_t access_mask,
1438 uint32_t *access_mask_out)
1439 {
1440 NTSTATUS status;
1441 uint32_t orig_access_mask = access_mask;
1442 uint32_t rejected_share_access;
1443
1444 /*
1445 * Convert GENERIC bits to specific bits.
1446 */
1447
1448 se_map_generic(&access_mask, &file_generic_mapping);
1449
1450 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1451 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1452 if (file_existed) {
1453
1454 struct security_descriptor *sd;
1455 uint32_t access_granted = 0;
1456
1457 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1458 (SECINFO_OWNER |
1459 SECINFO_GROUP |
1460 SECINFO_DACL),&sd);
1461
1462 if (!NT_STATUS_IS_OK(status)) {
1463 DEBUG(10,("smbd_calculate_access_mask: "
1464 "Could not get acl on file %s: %s\n",
1465 smb_fname_str_dbg(smb_fname),
1466 nt_errstr(status)));
1467 return NT_STATUS_ACCESS_DENIED;
1468 }
1469
1470 status = smb1_file_se_access_check(conn,
1471 sd,
1472 get_current_nttok(conn),
1473 access_mask,
1474 &access_granted);
1475
1476 TALLOC_FREE(sd);
1477
1478 if (!NT_STATUS_IS_OK(status)) {
1479 DEBUG(10, ("smbd_calculate_access_mask: "
1480 "Access denied on file %s: "
1481 "when calculating maximum access\n",
1482 smb_fname_str_dbg(smb_fname)));
1483 return NT_STATUS_ACCESS_DENIED;
1484 }
1485
1486 access_mask = access_granted;
1487 } else {
1488 access_mask = FILE_GENERIC_ALL;
1489 }
1490
1491 access_mask &= conn->share_access;
1492 }
1493
1494 rejected_share_access = access_mask & ~(conn->share_access);
1495
1496 if (rejected_share_access) {
1497 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1498 "file %s: rejected by share access mask[0x%08X] "
1499 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1500 smb_fname_str_dbg(smb_fname),
1501 conn->share_access,
1502 orig_access_mask, access_mask,
1503 rejected_share_access));
1504 return NT_STATUS_ACCESS_DENIED;
1505 }
1506
1507 *access_mask_out = access_mask;
1508 return NT_STATUS_OK;
1509 }
1510
1511 /****************************************************************************
1512 Remove the deferred open entry under lock.
1513 ****************************************************************************/
1514
1515 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1516 struct server_id pid)
1517 {
1518 struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1519 NULL, NULL, NULL);
1520 if (lck == NULL) {
1521 DEBUG(0, ("could not get share mode lock\n"));
1522 } else {
1523 del_deferred_open_entry(lck, mid, pid);
1524 TALLOC_FREE(lck);
1525 }
1526 }
1527
1528 /****************************************************************
1529 Ensure we get the brlock lock followed by the share mode lock
1530 in the correct order to prevent deadlocks if other smbd's are
1531 using the brlock database on this file simultaneously with this open
1532 (that code also gets the locks in brlock -> share mode lock order).
1533 ****************************************************************/
1534
1535 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1536 files_struct *fsp,
1537 const struct file_id id,
1538 const char *connectpath,
1539 const struct smb_filename *smb_fname,
1540 const struct timespec *p_old_write_time,
1541 struct share_mode_lock **p_lck,
1542 struct byte_range_lock **p_br_lck)
1543 {
1544 /* Ordering - we must get the br_lck for this
1545 file before the share mode. */
1546 if (lp_locking(fsp->conn->params)) {
1547 *p_br_lck = brl_get_locks_readonly(fsp);
1548 if (*p_br_lck == NULL) {
1549 DEBUG(0, ("Could not get br_lock\n"));
1550 return false;
1551 }
1552 /* Note - we don't need to free the returned
1553 br_lck explicitly as it was allocated on talloc_tos()
1554 and so will be autofreed (and release the lock)
1555 once the frame context disappears.
1556
1557 If it was set to fsp->brlock_rec then it was
1558 talloc_move'd to hang off the fsp pointer and
1559 in this case is guarenteed to not be holding the
1560 lock on the brlock database. */
1561 }
1562
1563 *p_lck = get_share_mode_lock(mem_ctx,
1564 id,
1565 connectpath,
1566 smb_fname,
1567 p_old_write_time);
1568
1569 if (*p_lck == NULL) {
1570 DEBUG(0, ("Could not get share mode lock\n"));
1571 TALLOC_FREE(*p_br_lck);
1572 return false;
1573 }
1574 return true;
1575 }
1576
1577 /****************************************************************************
1578 Open a file with a share mode. Passed in an already created files_struct *.
1579 ****************************************************************************/
1580
1581 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1582 struct smb_request *req,
1583 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1584 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1585 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1586 uint32 create_options, /* options such as delete on close. */
1587 uint32 new_dos_attributes, /* attributes used for new file. */
1588 int oplock_request, /* internal Samba oplock codes. */
1589 /* Information (FILE_EXISTS etc.) */
1590 uint32_t private_flags, /* Samba specific flags. */
1591 int *pinfo,
1592 files_struct *fsp)
1593 {
1594 struct smb_filename *smb_fname = fsp->fsp_name;
1595 int flags=0;
1596 int flags2=0;
1597 bool file_existed = VALID_STAT(smb_fname->st);
1598 bool def_acl = False;
1599 bool posix_open = False;
1600 bool new_file_created = False;
1601 bool clear_ads = false;
1602 struct file_id id;
1603 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1604 mode_t new_unx_mode = (mode_t)0;
1605 mode_t unx_mode = (mode_t)0;
1606 int info;
1607 uint32 existing_dos_attributes = 0;
1608 struct timeval request_time = timeval_zero();
1609 struct share_mode_lock *lck = NULL;
1610 uint32 open_access_mask = access_mask;
1611 NTSTATUS status;
1612 char *parent_dir;
1613
1614 ZERO_STRUCT(id);
1615
1616 if (conn->printer) {
1617 /*
1618 * Printers are handled completely differently.
1619 * Most of the passed parameters are ignored.
1620 */
1621
1622 if (pinfo) {
1623 *pinfo = FILE_WAS_CREATED;
1624 }
1625
1626 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1627 smb_fname_str_dbg(smb_fname)));
1628
1629 if (!req) {
1630 DEBUG(0,("open_file_ntcreate: printer open without "
1631 "an SMB request!\n"));
1632 return NT_STATUS_INTERNAL_ERROR;
1633 }
1634
1635 return print_spool_open(fsp, smb_fname->base_name,
1636 req->vuid);
1637 }
1638
1639 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1640 NULL)) {
1641 return NT_STATUS_NO_MEMORY;
1642 }
1643
1644 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1645 posix_open = True;
1646 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1647 new_dos_attributes = 0;
1648 } else {
1649 /* Windows allows a new file to be created and
1650 silently removes a FILE_ATTRIBUTE_DIRECTORY
1651 sent by the client. Do the same. */
1652
1653 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1654
1655 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1656 * created new. */
1657 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1658 smb_fname, parent_dir);
1659 }
1660
1661 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1662 "access_mask=0x%x share_access=0x%x "
1663 "create_disposition = 0x%x create_options=0x%x "
1664 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1665 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1666 access_mask, share_access, create_disposition,
1667 create_options, (unsigned int)unx_mode, oplock_request,
1668 (unsigned int)private_flags));
1669
1670 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1671 DEBUG(0, ("No smb request but not an internal only open!\n"));
1672 return NT_STATUS_INTERNAL_ERROR;
1673 }
1674
1675 /*
1676 * Only non-internal opens can be deferred at all
1677 */
1678
1679 if (req) {
1680 void *ptr;
1681 if (get_deferred_open_message_state(req,
1682 &request_time,
1683 &ptr)) {
1684
1685 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1686 /* Remember the absolute time of the original
1687 request with this mid. We'll use it later to
1688 see if this has timed out. */
1689
1690 /* Remove the deferred open entry under lock. */
1691 remove_deferred_open_entry(
1692 state->id, req->mid,
1693 sconn_server_id(req->sconn));
1694
1695 /* Ensure we don't reprocess this message. */
1696 remove_deferred_open_message_smb(req->sconn, req->mid);
1697 }
1698 }
1699
1700 status = check_name(conn, smb_fname->base_name);
1701 if (!NT_STATUS_IS_OK(status)) {
1702 return status;
1703 }
1704
1705 if (!posix_open) {
1706 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1707 if (file_existed) {
1708 existing_dos_attributes = dos_mode(conn, smb_fname);
1709 }
1710 }
1711
1712 /* ignore any oplock requests if oplocks are disabled */
1713 if (!lp_oplocks(SNUM(conn)) ||
1714 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1715 /* Mask off everything except the private Samba bits. */
1716 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1717 }
1718
1719 /* this is for OS/2 long file names - say we don't support them */
1720 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1721 /* OS/2 Workplace shell fix may be main code stream in a later
1722 * release. */
1723 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1724 "supported.\n"));
1725 if (use_nt_status()) {
1726 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1727 }
1728 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1729 }
1730
1731 switch( create_disposition ) {
1732 /*
1733 * Currently we're using FILE_SUPERSEDE as the same as
1734 * FILE_OVERWRITE_IF but they really are
1735 * different. FILE_SUPERSEDE deletes an existing file
1736 * (requiring delete access) then recreates it.
1737 */
1738 case FILE_SUPERSEDE:
1739 /* If file exists replace/overwrite. If file doesn't
1740 * exist create. */
1741 flags2 |= (O_CREAT | O_TRUNC);
1742 clear_ads = true;
1743 break;
1744
1745 case FILE_OVERWRITE_IF:
1746 /* If file exists replace/overwrite. If file doesn't
1747 * exist create. */
1748 flags2 |= (O_CREAT | O_TRUNC);
1749 clear_ads = true;
1750 break;
1751
1752 case FILE_OPEN:
1753 /* If file exists open. If file doesn't exist error. */
1754 if (!file_existed) {
1755 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1756 "requested for file %s and file "
1757 "doesn't exist.\n",
1758 smb_fname_str_dbg(smb_fname)));
1759 errno = ENOENT;
1760 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1761 }
1762 break;
1763
1764 case FILE_OVERWRITE:
1765 /* If file exists overwrite. If file doesn't exist
1766 * error. */
1767 if (!file_existed) {
1768 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1769 "requested for file %s and file "
1770 "doesn't exist.\n",
1771 smb_fname_str_dbg(smb_fname) ));
1772 errno = ENOENT;
1773 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1774 }
1775 flags2 |= O_TRUNC;
1776 clear_ads = true;
1777 break;
1778
1779 case FILE_CREATE:
1780 /* If file exists error. If file doesn't exist
1781 * create. */
1782 if (file_existed) {
1783 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1784 "requested for file %s and file "
1785 "already exists.\n",
1786 smb_fname_str_dbg(smb_fname)));
1787 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1788 errno = EISDIR;
1789 } else {
1790 errno = EEXIST;
1791 }
1792 return map_nt_error_from_unix(errno);
1793 }
1794 flags2 |= (O_CREAT|O_EXCL);
1795 break;
1796
1797 case FILE_OPEN_IF:
1798 /* If file exists open. If file doesn't exist
1799 * create. */
1800 flags2 |= O_CREAT;
1801 break;
1802
1803 default:
1804 return NT_STATUS_INVALID_PARAMETER;
1805 }
1806
1807 /* We only care about matching attributes on file exists and
1808 * overwrite. */
1809
1810 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1811 (create_disposition == FILE_OVERWRITE_IF))) {
1812 if (!open_match_attributes(conn, existing_dos_attributes,
1813 new_dos_attributes,
1814 smb_fname->st.st_ex_mode,
1815 unx_mode, &new_unx_mode)) {
1816 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1817 "for file %s (%x %x) (0%o, 0%o)\n",
1818 smb_fname_str_dbg(smb_fname),
1819 existing_dos_attributes,
1820 new_dos_attributes,
1821 (unsigned int)smb_fname->st.st_ex_mode,
1822 (unsigned int)unx_mode ));
1823 errno = EACCES;
1824 return NT_STATUS_ACCESS_DENIED;
1825 }
1826 }
1827
1828 status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1829 access_mask,
1830 &access_mask);
1831 if (!NT_STATUS_IS_OK(status)) {
1832 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1833 "on file %s returned %s\n",
1834 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1835 return status;
1836 }
1837
1838 open_access_mask = access_mask;
1839
1840 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1841 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1842 }
1843
1844 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1845 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1846 access_mask));
1847
1848 /*
1849 * Note that we ignore the append flag as append does not
1850 * mean the same thing under DOS and Unix.
1851 */
1852
1853 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1854 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1855 /* DENY_DOS opens are always underlying read-write on the
1856 file handle, no matter what the requested access mask
1857 says. */
1858 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1859 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1860 flags = O_RDWR;
1861 } else {
1862 flags = O_WRONLY;
1863 }
1864 } else {
1865 flags = O_RDONLY;
1866 }
1867
1868 /*
1869 * Currently we only look at FILE_WRITE_THROUGH for create options.
1870 */
1871
1872 #if defined(O_SYNC)
1873 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1874 flags2 |= O_SYNC;
1875 }
1876 #endif /* O_SYNC */
1877
1878 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1879 flags2 |= O_APPEND;
1880 }
1881
1882 if (!posix_open && !CAN_WRITE(conn)) {
1883 /*
1884 * We should really return a permission denied error if either
1885 * O_CREAT or O_TRUNC are set, but for compatibility with
1886 * older versions of Samba we just AND them out.
1887 */
1888 flags2 &= ~(O_CREAT|O_TRUNC);
1889 }
1890
1891 /*
1892 * Ensure we can't write on a read-only share or file.
1893 */
1894
1895 if (flags != O_RDONLY && file_existed &&
1896 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1897 DEBUG(5,("open_file_ntcreate: write access requested for "
1898 "file %s on read only %s\n",
1899 smb_fname_str_dbg(smb_fname),
1900 !CAN_WRITE(conn) ? "share" : "file" ));
1901 errno = EACCES;
1902 return NT_STATUS_ACCESS_DENIED;
1903 }
1904
1905 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1906 fsp->share_access = share_access;
1907 fsp->fh->private_options = private_flags;
1908 fsp->access_mask = open_access_mask; /* We change this to the
1909 * requested access_mask after
1910 * the open is done. */
1911 fsp->posix_open = posix_open;
1912
1913 /* Ensure no SAMBA_PRIVATE bits can be set. */
1914 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1915
1916 if (timeval_is_zero(&request_time)) {
1917 request_time = fsp->open_time;
1918 }
1919
1920 if (file_existed) {
1921 struct byte_range_lock *br_lck = NULL;
1922 struct share_mode_entry *batch_entry = NULL;
1923 struct share_mode_entry *exclusive_entry = NULL;
1924 bool got_level2_oplock = false;
1925 bool got_a_none_oplock = false;
1926
1927 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1928 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1929
1930 if (!acquire_ordered_locks(talloc_tos(),
1931 fsp,
1932 id,
1933 conn->connectpath,
1934 smb_fname,
1935 &old_write_time,
1936 &lck,
1937 &br_lck)) {
1938 return NT_STATUS_SHARING_VIOLATION;
1939 }
1940
1941 /* Get the types we need to examine. */
1942 find_oplock_types(fsp,
1943 oplock_request,
1944 lck,
1945 &batch_entry,
1946 &exclusive_entry,
1947 &got_level2_oplock,
1948 &got_a_none_oplock);
1949
1950 /* First pass - send break only on batch oplocks. */
1951 if ((req != NULL) &&
1952 delay_for_batch_oplocks(fsp,
1953 req->mid,
1954 oplock_request,
1955 batch_entry)) {
1956 schedule_defer_open(lck, request_time, req);
1957 TALLOC_FREE(lck);
1958 return NT_STATUS_SHARING_VIOLATION;
1959 }
1960
1961 /* Use the client requested access mask here, not the one we
1962 * open with. */
1963 status = open_mode_check(conn, lck, fsp->name_hash,
1964 access_mask, share_access,
1965 create_options, &file_existed);
1966
1967 if (NT_STATUS_IS_OK(status)) {
1968 /* We might be going to allow this open. Check oplock
1969 * status again. */
1970 /* Second pass - send break for both batch or
1971 * exclusive oplocks. */
1972 if ((req != NULL) &&
1973 delay_for_exclusive_oplocks(
1974 fsp,
1975 req->mid,
1976 oplock_request,
1977 exclusive_entry)) {
1978 schedule_defer_open(lck, request_time, req);
1979 TALLOC_FREE(lck);
1980 return NT_STATUS_SHARING_VIOLATION;
1981 }
1982 }
1983
1984 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1985 /* DELETE_PENDING is not deferred for a second */
1986 TALLOC_FREE(lck);
1987 return status;
1988 }
1989
1990 grant_fsp_oplock_type(fsp,
1991 br_lck,
1992 oplock_request,
1993 got_level2_oplock,
1994 got_a_none_oplock);
1995
1996 if (!NT_STATUS_IS_OK(status)) {
1997 uint32 can_access_mask;
1998 bool can_access = True;
1999
2000 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2001
2002 /* Check if this can be done with the deny_dos and fcb
2003 * calls. */
2004 if (private_flags &
2005 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2006 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2007 if (req == NULL) {
2008 DEBUG(0, ("DOS open without an SMB "
2009 "request!\n"));
2010 TALLOC_FREE(lck);
2011 return NT_STATUS_INTERNAL_ERROR;
2012 }
2013
2014 /* Use the client requested access mask here,
2015 * not the one we open with. */
2016 status = fcb_or_dos_open(req,
2017 conn,
2018 fsp,
2019 smb_fname,
2020 id,
2021 req->smbpid,
2022 req->vuid,
2023 access_mask,
2024 share_access,
2025 create_options);
2026
2027 if (NT_STATUS_IS_OK(status)) {
2028 TALLOC_FREE(lck);
2029 if (pinfo) {
2030 *pinfo = FILE_WAS_OPENED;
2031 }
2032 return NT_STATUS_OK;
2033 }
2034 }
2035
2036 /*
2037 * This next line is a subtlety we need for
2038 * MS-Access. If a file open will fail due to share
2039 * permissions and also for security (access) reasons,
2040 * we need to return the access failed error, not the
2041 * share error. We can't open the file due to kernel
2042 * oplock deadlock (it's possible we failed above on
2043 * the open_mode_check()) so use a userspace check.
2044 */
2045
2046 if (flags & O_RDWR) {
2047 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2048 } else if (flags & O_WRONLY) {
2049 can_access_mask = FILE_WRITE_DATA;
2050 } else {
2051 can_access_mask = FILE_READ_DATA;
2052 }
2053
2054 if (((can_access_mask & FILE_WRITE_DATA) &&
2055 !CAN_WRITE(conn)) ||
2056 !can_access_file_data(conn, smb_fname,
2057 can_access_mask)) {
2058 can_access = False;
2059 }
2060
2061 /*
2062 * If we're returning a share violation, ensure we
2063 * cope with the braindead 1 second delay.
2064 */
2065
2066 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2067 lp_defer_sharing_violations()) {
2068 struct timeval timeout;
2069 struct deferred_open_record state;
2070 int timeout_usecs;
2071
2072 /* this is a hack to speed up torture tests
2073 in 'make test' */
2074 timeout_usecs = lp_parm_int(SNUM(conn),
2075 "smbd","sharedelay",
2076 SHARING_VIOLATION_USEC_WAIT);
2077
2078 /* This is a relative time, added to the absolute
2079 request_time value to get the absolute timeout time.
2080 Note that if this is the second or greater time we enter
2081 this codepath for this particular request mid then
2082 request_time is left as the absolute time of the *first*
2083 time this request mid was processed. This is what allows
2084 the request to eventually time out. */
2085
2086 timeout = timeval_set(0, timeout_usecs);
2087
2088 /* Nothing actually uses state.delayed_for_oplocks
2089 but it's handy to differentiate in debug messages
2090 between a 30 second delay due to oplock break, and
2091 a 1 second delay for share mode conflicts. */
2092
2093 state.delayed_for_oplocks = False;
2094 state.id = id;
2095
2096 if ((req != NULL)
2097 && !request_timed_out(request_time,
2098 timeout)) {
2099 defer_open(lck, request_time, timeout,
2100 req, &state);
2101 }
2102 }
2103
2104 TALLOC_FREE(lck);
2105 if (can_access) {
2106 /*
2107 * We have detected a sharing violation here
2108 * so return the correct error code
2109 */
2110 status = NT_STATUS_SHARING_VIOLATION;
2111 } else {
2112 status = NT_STATUS_ACCESS_DENIED;
2113 }
2114 return status;
2115 }
2116
2117 /*
2118 * We exit this block with the share entry *locked*.....
2119 */
2120 }
2121
2122 SMB_ASSERT(!file_existed || (lck != NULL));
2123
2124 /*
2125 * Ensure we pay attention to default ACLs on directories if required.
2126 */
2127
2128 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2129 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2130 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2131 }
2132
2133 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2134 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2135 (unsigned int)flags, (unsigned int)flags2,
2136 (unsigned int)unx_mode, (unsigned int)access_mask,
2137 (unsigned int)open_access_mask));
2138
2139 /*
2140 * open_file strips any O_TRUNC flags itself.
2141 */
2142
2143 fsp_open = open_file(fsp, conn, req, parent_dir,
2144 flags|flags2, unx_mode, access_mask,
2145 open_access_mask);
2146
2147 if (!NT_STATUS_IS_OK(fsp_open)) {
2148 TALLOC_FREE(lck);
2149 return fsp_open;
2150 }
2151
2152 if (!file_existed) {
2153 struct byte_range_lock *br_lck = NULL;
2154 struct share_mode_entry *batch_entry = NULL;
2155 struct share_mode_entry *exclusive_entry = NULL;
2156 bool got_level2_oplock = false;
2157 bool got_a_none_oplock = false;
2158 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2159 /*
2160 * Deal with the race condition where two smbd's detect the
2161 * file doesn't exist and do the create at the same time. One
2162 * of them will win and set a share mode, the other (ie. this
2163 * one) should check if the requested share mode for this
2164 * create is allowed.
2165 */
2166
2167 /*
2168 * Now the file exists and fsp is successfully opened,
2169 * fsp->dev and fsp->inode are valid and should replace the
2170 * dev=0,inode=0 from a non existent file. Spotted by
2171 * Nadav Danieli <nadavd@exanet.com>. JRA.
2172 */
2173
2174 id = fsp->file_id;
2175
2176 if (!acquire_ordered_locks(talloc_tos(),
2177 fsp,
2178 id,
2179 conn->connectpath,
2180 smb_fname,
2181 &old_write_time,
2182 &lck,
2183 &br_lck)) {
2184 return NT_STATUS_SHARING_VIOLATION;
2185 }
2186
2187 /* Get the types we need to examine. */
2188 find_oplock_types(fsp,
2189 oplock_request,
2190 lck,
2191 &batch_entry,
2192 &exclusive_entry,
2193 &got_level2_oplock,
2194 &got_a_none_oplock);
2195
2196 /* First pass - send break only on batch oplocks. */
2197 if ((req != NULL) &&
2198 delay_for_batch_oplocks(fsp,
2199 req->mid,
2200 oplock_request,
2201 batch_entry)) {
2202 schedule_defer_open(lck, request_time, req);
2203 TALLOC_FREE(lck);
2204 fd_close(fsp);
2205 return NT_STATUS_SHARING_VIOLATION;
2206 }
2207
2208 status = open_mode_check(conn, lck, fsp->name_hash,
2209 access_mask, share_access,
2210 create_options, &file_existed);
2211
2212 if (NT_STATUS_IS_OK(status)) {
2213 /* We might be going to allow this open. Check oplock
2214 * status again. */
2215 /* Second pass - send break for both batch or
2216 * exclusive oplocks. */
2217 if ((req != NULL) &&
2218 delay_for_exclusive_oplocks(
2219 fsp,
2220 req->mid,
2221 oplock_request,
2222 exclusive_entry)) {
2223 schedule_defer_open(lck, request_time, req);
2224 TALLOC_FREE(lck);
2225 fd_close(fsp);
2226 return NT_STATUS_SHARING_VIOLATION;
2227 }
2228 }
2229
2230 if (!NT_STATUS_IS_OK(status)) {
2231 struct deferred_open_record state;
2232
2233 state.delayed_for_oplocks = False;
2234 state.id = id;
2235
2236 /* Do it all over again immediately. In the second
2237 * round we will find that the file existed and handle
2238 * the DELETE_PENDING and FCB cases correctly. No need
2239 * to duplicate the code here. Essentially this is a
2240 * "goto top of this function", but don't tell
2241 * anybody... */
2242
2243 if (req != NULL) {
2244 defer_open(lck, request_time, timeval_zero(),
2245 req, &state);
2246 }
2247 TALLOC_FREE(lck);
2248 fd_close(fsp);
2249 return status;
2250 }
2251
2252 grant_fsp_oplock_type(fsp,
2253 br_lck,
2254 oplock_request,
2255 got_level2_oplock,
2256 got_a_none_oplock);
2257
2258 /*
2259 * We exit this block with the share entry *locked*.....
2260 */
2261
2262 }
2263
2264 SMB_ASSERT(lck != NULL);
2265
2266 /* Delete streams if create_disposition requires it */
2267 if (file_existed && clear_ads &&
2268 !is_ntfs_stream_smb_fname(smb_fname)) {
2269 status = delete_all_streams(conn, smb_fname->base_name);
2270 if (!NT_STATUS_IS_OK(status)) {
2271 TALLOC_FREE(lck);
2272 fd_close(fsp);
2273 return status;
2274 }
2275 }
2276
2277 /* note that we ignore failure for the following. It is
2278 basically a hack for NFS, and NFS will never set one of
2279 these only read them. Nobody but Samba can ever set a deny
2280 mode and we have already checked our more authoritative
2281 locking database for permission to set this deny mode. If
2282 the kernel refuses the operations then the kernel is wrong.
2283 note that GPFS supports it as well - jmcd */
2284
2285 if (fsp->fh->fd != -1) {
2286 int ret_flock;
2287 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2288 if(ret_flock == -1 ){
2289
2290 TALLOC_FREE(lck);
2291 fd_close(fsp);
2292
2293 return NT_STATUS_SHARING_VIOLATION;
2294 }
2295 }
2296
2297 /*
2298 * At this point onwards, we can guarentee that the share entry
2299 * is locked, whether we created the file or not, and that the
2300 * deny mode is compatible with all current opens.
2301 */
2302
2303 /*
2304 * If requested, truncate the file.
2305 */
2306
2307 if (file_existed && (flags2&O_TRUNC)) {
2308 /*
2309 * We are modifing the file after open - update the stat
2310 * struct..
2311 */
2312 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2313 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2314 status = map_nt_error_from_unix(errno);
2315 TALLOC_FREE(lck);
2316 fd_close(fsp);
2317 return status;
2318 }
2319 }
2320
2321 /*
2322 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2323 * but we don't have to store this - just ignore it on access check.
2324 */
2325 if (conn->sconn->using_smb2) {
2326 /*
2327 * SMB2 doesn't return it (according to Microsoft tests).
2328 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2329 * File created with access = 0x7 (Read, Write, Delete)
2330 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2331 */
2332 fsp->access_mask = access_mask;
2333 } else {
2334 /* But SMB1 does. */
2335 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2336 }
2337
2338 if (file_existed) {
2339 /* stat opens on existing files don't get oplocks. */
2340 if (is_stat_open(open_access_mask)) {
2341 fsp->oplock_type = NO_OPLOCK;
2342 }
2343
2344 if (!(flags2 & O_TRUNC)) {
2345 info = FILE_WAS_OPENED;
2346 } else {
2347 info = FILE_WAS_OVERWRITTEN;
2348 }
2349 } else {
2350 info = FILE_WAS_CREATED;
2351 }
2352
2353 if (pinfo) {
2354 *pinfo = info;
2355 }
2356
2357 /*
2358 * Setup the oplock info in both the shared memory and
2359 * file structs.
2360 */
2361
2362 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2363 /*
2364 * Could not get the kernel oplock or there are byte-range
2365 * locks on the file.
2366 */
2367 fsp->oplock_type = NO_OPLOCK;
2368 }
2369
2370 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2371 new_file_created = True;
2372 }
2373
2374 set_share_mode(lck, fsp, get_current_uid(conn),
2375 req ? req->mid : 0,
2376 fsp->oplock_type);
2377
2378 /* Handle strange delete on close create semantics. */
2379 if (create_options & FILE_DELETE_ON_CLOSE) {
2380
2381 status = can_set_delete_on_close(fsp, new_dos_attributes);
2382
2383 if (!NT_STATUS_IS_OK(status)) {
2384 /* Remember to delete the mode we just added. */
2385 del_share_mode(lck, fsp);
2386 TALLOC_FREE(lck);
2387 fd_close(fsp);
2388 return status;
2389 }
2390 /* Note that here we set the *inital* delete on close flag,
2391 not the regular one. The magic gets handled in close. */
2392 fsp->initial_delete_on_close = True;
2393 }
2394
2395 if (new_file_created) {
2396 /* Files should be initially set as archive */
2397 if (lp_map_archive(SNUM(conn)) ||
2398 lp_store_dos_attributes(SNUM(conn))) {
2399 if (!posix_open) {
2400 if (file_set_dosmode(conn, smb_fname,
2401 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2402 parent_dir, true) == 0) {
2403 unx_mode = smb_fname->st.st_ex_mode;
2404 }
2405 }
2406 }
2407 }
2408
2409 /* Determine sparse flag. */
2410 if (posix_open) {
2411 /* POSIX opens are sparse by default. */
2412 fsp->is_sparse = true;
2413 } else {
2414 fsp->is_sparse = (file_existed &&
2415 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2416 }
2417
2418 /*
2419 * Take care of inherited ACLs on created files - if default ACL not
2420 * selected.
2421 */
2422
2423 if (!posix_open && !file_existed && !def_acl) {
2424
2425 int saved_errno = errno; /* We might get ENOSYS in the next
2426 * call.. */
2427
2428 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2429 errno == ENOSYS) {
2430 errno = saved_errno; /* Ignore ENOSYS */
2431 }
2432
2433 } else if (new_unx_mode) {
2434
2435 int ret = -1;
2436
2437 /* Attributes need changing. File already existed. */
2438
2439 {
2440 int saved_errno = errno; /* We might get ENOSYS in the
2441 * next call.. */
2442 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2443
2444 if (ret == -1 && errno == ENOSYS) {
2445 errno = saved_errno; /* Ignore ENOSYS */
2446 } else {
2447 DEBUG(5, ("open_file_ntcreate: reset "
2448 "attributes of file %s to 0%o\n",
2449 smb_fname_str_dbg(smb_fname),
2450 (unsigned int)new_unx_mode));
2451 ret = 0; /* Don't do the fchmod below. */
2452 }
2453 }
2454
2455 if ((ret == -1) &&
2456 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2457 DEBUG(5, ("open_file_ntcreate: failed to reset "
2458 "attributes of file %s to 0%o\n",
2459 smb_fname_str_dbg(smb_fname),
2460 (unsigned int)new_unx_mode));
2461 }
2462
2463 /* If this is a successful open, we must remove any deferred open
2464 * records. */
2465 if (req != NULL) {
2466 del_deferred_open_entry(lck, req->mid,
2467 sconn_server_id(req->sconn));
2468 }
2469 TALLOC_FREE(lck);
2470
2471 return NT_STATUS_OK;
2472 }
2473
2474
2475 /****************************************************************************
2476 Open a file for for write to ensure that we can fchmod it.
2477 ****************************************************************************/
2478
2479 NTSTATUS open_file_fchmod(connection_struct *conn,
2480 struct smb_filename *smb_fname,
2481 files_struct **result)
2482 {
2483 if (!VALID_STAT(smb_fname->st)) {
2484 return NT_STATUS_INVALID_PARAMETER;
2485 }
2486
2487 return SMB_VFS_CREATE_FILE(
2488 conn, /* conn */
2489 NULL, /* req */
2490 0, /* root_dir_fid */
2491 smb_fname, /* fname */
2492 FILE_WRITE_DATA, /* access_mask */
2493 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2494 FILE_SHARE_DELETE),
2495 FILE_OPEN, /* create_disposition*/
2496 0, /* create_options */
2497 0, /* file_attributes */
2498 INTERNAL_OPEN_ONLY, /* oplock_request */
2499 0, /* allocation_size */
2500 0, /* private_flags */
2501 NULL, /* sd */
2502 NULL, /* ea_list */
2503 result, /* result */
2504 NULL); /* pinfo */
2505 }
2506
2507 static NTSTATUS mkdir_internal(connection_struct *conn,
2508 struct smb_filename *smb_dname,
2509 uint32 file_attributes)
2510 {
2511 mode_t mode;
2512 char *parent_dir = NULL;
2513 NTSTATUS status;
2514 bool posix_open = false;
2515 bool need_re_stat = false;
2516 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2517
2518 if(access_mask & ~(conn->share_access)) {
2519 DEBUG(5,("mkdir_internal: failing share access "
2520 "%s\n", lp_servicename(SNUM(conn))));
2521 return NT_STATUS_ACCESS_DENIED;
2522 }
2523
2524 status = check_name(conn, smb_dname->base_name);
2525 if (!NT_STATUS_IS_OK(status)) {
2526 return status;
2527 }
2528
2529 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2530 NULL)) {
2531 return NT_STATUS_NO_MEMORY;
2532 }
2533
2534 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2535 posix_open = true;
2536 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2537 } else {
2538 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2539 }
2540
2541 status = check_parent_access(conn,
2542 smb_dname,
2543 access_mask,
2544 &parent_dir,
2545 NULL);
2546 if(!NT_STATUS_IS_OK(status)) {
2547 DEBUG(5,("mkdir_internal: check_parent_access "
2548 "on directory %s for path %s returned %s\n",
2549 parent_dir,
2550 smb_dname->base_name,
2551 nt_errstr(status) ));
2552 return status;
2553 }
2554
2555 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2556 return map_nt_error_from_unix(errno);
2557 }
2558
2559 /* Ensure we're checking for a symlink here.... */
2560 /* We don't want to get caught by a symlink racer. */
2561
2562 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2563 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2564 smb_fname_str_dbg(smb_dname), strerror(errno)));
2565 return map_nt_error_from_unix(errno);
2566 }
2567
2568 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2569 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2570 smb_fname_str_dbg(smb_dname)));
2571 return NT_STATUS_NOT_A_DIRECTORY;
2572 }
2573
2574 if (lp_store_dos_attributes(SNUM(conn))) {
2575 if (!posix_open) {
2576 file_set_dosmode(conn, smb_dname,
2577 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2578 parent_dir, true);
2579 }
2580 }
2581
2582 if (lp_inherit_perms(SNUM(conn))) {
2583 inherit_access_posix_acl(conn, parent_dir,
2584 smb_dname->base_name, mode);
2585 need_re_stat = true;
2586 }
2587
2588 if (!posix_open) {
2589 /*
2590 * Check if high bits should have been set,
2591 * then (if bits are missing): add them.
2592 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2593 * dir.
2594 */
2595 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2596 (mode & ~smb_dname->st.st_ex_mode)) {
2597 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2598 (smb_dname->st.st_ex_mode |
2599 (mode & ~smb_dname->st.st_ex_mode)));
2600 need_re_stat = true;
2601 }
2602 }
2603
2604 /* Change the owner if required. */
2605 if (lp_inherit_owner(SNUM(conn))) {
2606 change_dir_owner_to_parent(conn, parent_dir,
2607 smb_dname->base_name,
2608 &smb_dname->st);
2609 need_re_stat = true;
2610 }
2611
2612 if (need_re_stat) {
2613 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2614 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2615 smb_fname_str_dbg(smb_dname), strerror(errno)));
2616 return map_nt_error_from_unix(errno);
2617 }
2618 }
2619
2620 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2621 smb_dname->base_name);
2622
2623 return NT_STATUS_OK;
2624 }
2625
2626 /****************************************************************************
2627 Ensure we didn't get symlink raced on opening a directory.
2628 ****************************************************************************/
2629
2630 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2631 const SMB_STRUCT_STAT *sbuf2)
2632 {
2633 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2634 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2635 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2636 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2637 return false;
2638 }
2639 return true;
2640 }
2641
2642 /****************************************************************************
2643 Open a directory from an NT SMB call.
2644 ****************************************************************************/
2645
2646 static NTSTATUS open_directory(connection_struct *conn,
2647 struct smb_request *req,
2648 struct smb_filename *smb_dname,
2649 uint32 access_mask,
2650 uint32 share_access,
2651 uint32 create_disposition,
2652 uint32 create_options,
2653 uint32 file_attributes,
2654 int *pinfo,
2655 files_struct **result)
2656 {
2657 files_struct *fsp = NULL;
2658 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2659 struct share_mode_lock *lck = NULL;
2660 NTSTATUS status;
2661 struct timespec mtimespec;
2662 int info = 0;
2663
2664 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2665
2666 /* Ensure we have a directory attribute. */
2667 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2668
2669 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2670 "share_access = 0x%x create_options = 0x%x, "
2671 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2672 smb_fname_str_dbg(smb_dname),
2673 (unsigned int)access_mask,
2674 (unsigned int)share_access,
2675 (unsigned int)create_options,
2676 (unsigned int)create_disposition,
2677 (unsigned int)file_attributes));
2678
2679 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2680 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2681 is_ntfs_stream_smb_fname(smb_dname)) {
2682 DEBUG(2, ("open_directory: %s is a stream name!\n",
2683 smb_fname_str_dbg(smb_dname)));
2684 return NT_STATUS_NOT_A_DIRECTORY;
2685 }
2686
2687 status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2688 access_mask, &access_mask);
2689 if (!NT_STATUS_IS_OK(status)) {
2690 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2691 "on file %s returned %s\n",
2692 smb_fname_str_dbg(smb_dname),
2693 nt_errstr(status)));
2694 return status;
2695 }
2696
2697 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2698 !security_token_has_privilege(get_current_nttok(conn),
2699 SEC_PRIV_SECURITY)) {
2700 DEBUG(10, ("open_directory: open on %s "
2701 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2702 smb_fname_str_dbg(smb_dname)));
2703 return NT_STATUS_PRIVILEGE_NOT_HELD;
2704 }
2705
2706 switch( create_disposition ) {
2707 case FILE_OPEN:
2708
2709 if (!dir_existed) {
2710 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2711 }
2712
2713 info = FILE_WAS_OPENED;
2714 break;
2715
2716 case FILE_CREATE:
2717
2718 /* If directory exists error. If directory doesn't
2719 * exist create. */
2720
2721 if (dir_existed) {
2722 status = NT_STATUS_OBJECT_NAME_COLLISION;
2723 DEBUG(2, ("open_directory: unable to create "
2724 "%s. Error was %s\n",
2725 smb_fname_str_dbg(smb_dname),
2726 nt_errstr(status)));
2727 return status;
2728 }
2729
2730 status = mkdir_internal(conn, smb_dname,
2731 file_attributes);
2732
2733 if (!NT_STATUS_IS_OK(status)) {
2734 DEBUG(2, ("open_directory: unable to create "
2735 "%s. Error was %s\n",
2736 smb_fname_str_dbg(smb_dname),
2737 nt_errstr(status)));
2738 return status;
2739 }
2740
2741 info = FILE_WAS_CREATED;
2742 break;
2743
2744 case FILE_OPEN_IF:
2745 /*
2746 * If directory exists open. If directory doesn't
2747 * exist create.
2748 */
2749
2750 if (dir_existed) {
2751 status = NT_STATUS_OK;
2752 info = FILE_WAS_OPENED;
2753 } else {
2754 status = mkdir_internal(conn, smb_dname,
2755 file_attributes);
2756
2757 if (NT_STATUS_IS_OK(status)) {
2758 info = FILE_WAS_CREATED;
2759 } else {
2760 /* Cope with create race. */
2761 if (!NT_STATUS_EQUAL(status,
2762 NT_STATUS_OBJECT_NAME_COLLISION)) {
2763 DEBUG(2, ("open_directory: unable to create "
2764 "%s. Error was %s\n",
2765 smb_fname_str_dbg(smb_dname),
2766 nt_errstr(status)));
2767 return status;
2768 }
2769 info = FILE_WAS_OPENED;
2770 }
2771 }
2772
2773 break;
2774
2775 case FILE_SUPERSEDE:
2776 case FILE_OVERWRITE:
2777 case FILE_OVERWRITE_IF:
2778 default:
2779 DEBUG(5,("open_directory: invalid create_disposition "
2780 "0x%x for directory %s\n",
2781 (unsigned int)create_disposition,
2782 smb_fname_str_dbg(smb_dname)));
2783 return NT_STATUS_INVALID_PARAMETER;
2784 }
2785
2786 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2787 DEBUG(5,("open_directory: %s is not a directory !\n",
2788 smb_fname_str_dbg(smb_dname)));
2789 return NT_STATUS_NOT_A_DIRECTORY;
2790 }
2791
2792 if (info == FILE_WAS_OPENED) {
2793 status = smbd_check_open_rights(conn, smb_dname, access_mask);
2794 if (!NT_STATUS_IS_OK(status)) {
2795 DEBUG(10, ("open_directory: smbd_check_open_rights on "
2796 "file %s failed with %s\n",
2797 smb_fname_str_dbg(smb_dname),
2798 nt_errstr(status)));
2799 return status;
2800 }
2801 }
2802
2803 status = file_new(req, conn, &fsp);
2804 if(!NT_STATUS_IS_OK(status)) {
2805 return status;
2806 }
2807
2808 /*
2809 * Setup the files_struct for it.
2810 */
2811
2812 fsp->mode = smb_dname->st.st_ex_mode;
2813 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2814 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2815 fsp->file_pid = req ? req->smbpid : 0;
2816 fsp->can_lock = False;
2817 fsp->can_read = False;
2818 fsp->can_write = False;
2819
2820 fsp->share_access = share_access;
2821 fsp->fh->private_options = 0;
2822 /*
2823 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2824 */
2825 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2826 fsp->print_file = NULL;
2827 fsp->modified = False;
2828 fsp->oplock_type = NO_OPLOCK;
2829 fsp->sent_oplock_break = NO_BREAK_SENT;
2830 fsp->is_directory = True;
2831 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2832 status = fsp_set_smb_fname(fsp, smb_dname);
2833 if (!NT_STATUS_IS_OK(status)) {
2834 file_free(req, fsp);
2835 return status;
2836 }
2837
2838 mtimespec = smb_dname->st.st_ex_mtime;
2839
2840 #ifdef O_DIRECTORY
2841 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2842 #else
2843 /* POSIX allows us to open a directory with O_RDONLY. */
2844 status = fd_open(conn, fsp, O_RDONLY, 0);
2845 #endif
2846 if (!NT_STATUS_IS_OK(status)) {
2847 DEBUG(5, ("open_directory: Could not open fd for "
2848 "%s (%s)\n",
2849 smb_fname_str_dbg(smb_dname),
2850 nt_errstr(status)));
2851 file_free(req, fsp);
2852 return status;
2853 }
2854
2855 status = vfs_stat_fsp(fsp);
2856 if (!NT_STATUS_IS_OK(status)) {
2857 fd_close(fsp);
2858 file_free(req, fsp);
2859 return status;
2860 }
2861
2862 /* Ensure there was no race condition. */
2863 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2864 DEBUG(5,("open_directory: stat struct differs for "
2865 "directory %s.\n",
2866 smb_fname_str_dbg(smb_dname)));
2867 fd_close(fsp);
2868 file_free(req, fsp);
2869 return NT_STATUS_ACCESS_DENIED;
2870 }
2871
2872 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2873 conn->connectpath, smb_dname, &mtimespec);
2874
2875 if (lck == NULL) {
2876 DEBUG(0, ("open_directory: Could not get share mode lock for "
2877 "%s\n", smb_fname_str_dbg(smb_dname)));
2878 fd_close(fsp);
2879 file_free(req, fsp);
2880 return NT_STATUS_SHARING_VIOLATION;
2881 }
2882
2883 status = open_mode_check(conn, lck, fsp->name_hash,
2884 access_mask, share_access,
2885 create_options, &dir_existed);
2886
2887 if (!NT_STATUS_IS_OK(status)) {
2888 TALLOC_FREE(lck);
2889 fd_close(fsp);
2890 file_free(req, fsp);
2891 return status;
2892 }
2893
2894 set_share_mode(lck, fsp, get_current_uid(conn),
2895 req ? req->mid : 0, NO_OPLOCK);
2896
2897 /* For directories the delete on close bit at open time seems
2898 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2899 if (create_options & FILE_DELETE_ON_CLOSE) {
2900 status = can_set_delete_on_close(fsp, 0);
2901 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2902 TALLOC_FREE(lck);
2903 fd_close(fsp);
2904 file_free(req, fsp);
2905 return status;
2906 }
2907
2908 if (NT_STATUS_IS_OK(status)) {
2909 /* Note that here we set the *inital* delete on close flag,
2910 not the regular one. The magic gets handled in close. */
2911 fsp->initial_delete_on_close = True;
2912 }
2913 }
2914
2915 TALLOC_FREE(lck);
2916
2917 if (pinfo) {
2918 *pinfo = info;
2919 }
2920
2921 *result = fsp;
2922 return NT_STATUS_OK;
2923 }
2924
2925 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2926 struct smb_filename *smb_dname)
2927 {
2928 NTSTATUS status;
2929 files_struct *fsp;
2930
2931 status = SMB_VFS_CREATE_FILE(
2932 conn, /* conn */
2933 req, /* req */
2934 0, /* root_dir_fid */
2935 smb_dname, /* fname */
2936 FILE_READ_ATTRIBUTES, /* access_mask */
2937 FILE_SHARE_NONE, /* share_access */
2938 FILE_CREATE, /* create_disposition*/
2939 FILE_DIRECTORY_FILE, /* create_options */
2940 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2941 0, /* oplock_request */
2942 0, /* allocation_size */
2943 0, /* private_flags */
2944 NULL, /* sd */
2945 NULL, /* ea_list */
2946 &fsp, /* result */
2947 NULL); /* pinfo */
2948
2949 if (NT_STATUS_IS_OK(status)) {
2950 close_file(req, fsp, NORMAL_CLOSE);
2951 }
2952
2953 return status;
2954 }
2955
2956 /****************************************************************************
2957 Receive notification that one of our open files has been renamed by another
2958 smbd process.
2959 ****************************************************************************/
2960
2961 void msg_file_was_renamed(struct messaging_context *msg,
2962 void *private_data,
2963 uint32_t msg_type,
2964 struct server_id server_id,
2965 DATA_BLOB *data)
2966 {
2967 struct smbd_server_connection *sconn;
2968 files_struct *fsp;
2969 char *frm = (char *)data->data;
2970 struct file_id id;
2971 const char *sharepath;
2972 const char *base_name;
2973 const char *stream_name;
2974 struct smb_filename *smb_fname = NULL;
2975 size_t sp_len, bn_len;
2976 NTSTATUS status;
2977
2978 sconn = msg_ctx_to_sconn(msg);
2979 if (sconn == NULL) {
2980 DEBUG(1, ("could not find sconn\n"));
2981 return;
2982 }
2983
2984 if (data->data == NULL
2985 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2986 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2987 (int)data->length));
2988 return;
2989 }
2990
2991 /* Unpack the message. */
2992 pull_file_id_24(frm, &id);
2993 sharepath = &frm[24];
2994 sp_len = strlen(sharepath);
2995 base_name = sharepath + sp_len + 1;
2996 bn_len = strlen(base_name);
2997 stream_name = sharepath + sp_len + 1 + bn_len + 1;
2998
2999 /* stream_name must always be NULL if there is no stream. */
3000 if (stream_name[0] == '\0') {
3001 stream_name = NULL;
3002 }
3003
3004 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3005 stream_name, NULL, &smb_fname);
3006 if (!NT_STATUS_IS_OK(status)) {
3007 return;
3008 }
3009
3010 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3011 "file_id %s\n",
3012 sharepath, smb_fname_str_dbg(smb_fname),
3013 file_id_string_tos(&id)));
3014
3015 for(fsp = file_find_di_first(sconn, id); fsp;
3016 fsp = file_find_di_next(fsp)) {
3017 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3018
3019 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3020 fsp->fnum, fsp_str_dbg(fsp),
3021 smb_fname_str_dbg(smb_fname)));
3022 status = fsp_set_smb_fname(fsp, smb_fname);
3023 if (!NT_STATUS_IS_OK(status)) {
3024 goto out;
3025 }
3026 } else {
3027 /* TODO. JRA. */
3028 /* Now we have the complete path we can work out if this is
3029 actually within this share and adjust newname accordingly. */
3030 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3031 "not sharepath %s) "
3032 "fnum %d from %s -> %s\n",
3033 fsp->conn->connectpath,
3034 sharepath,
3035 fsp->fnum,
3036 fsp_str_dbg(fsp),
3037 smb_fname_str_dbg(smb_fname)));
3038 }
3039 }
3040 out:
3041 TALLOC_FREE(smb_fname);
3042 return;
3043 }
3044
3045 /*
3046 * If a main file is opened for delete, all streams need to be checked for
3047 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3048 * If that works, delete them all by setting the delete on close and close.
3049 */
3050
3051 NTSTATUS open_streams_for_delete(connection_struct *conn,
3052 const char *fname)
3053 {
3054 struct stream_struct *stream_info = NULL;
3055 files_struct **streams = NULL;
3056 int i;
3057 unsigned int num_streams = 0;
3058 TALLOC_CTX *frame = talloc_stackframe();
3059 NTSTATUS status;
3060
3061 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3062 &num_streams, &stream_info);
3063
3064 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3065 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3066 DEBUG(10, ("no streams around\n"));
3067 TALLOC_FREE(frame);
3068 return NT_STATUS_OK;
3069 }
3070
3071 if (!NT_STATUS_IS_OK(status)) {
3072 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3073 nt_errstr(status)));
3074 goto fail;
3075 }
3076
3077 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3078 num_streams));
3079
3080 if (num_streams == 0) {
3081 TALLOC_FREE(frame);
3082 return NT_STATUS_OK;
3083 }
3084
3085 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3086 if (streams == NULL) {
3087 DEBUG(0, ("talloc failed\n"));
3088 status = NT_STATUS_NO_MEMORY;
3089 goto fail;
3090 }
3091
3092 for (i=0; i<num_streams; i++) {
3093 struct smb_filename *smb_fname = NULL;
3094
3095 if (strequal(stream_info[i].name, "::$DATA")) {
3096 streams[i] = NULL;
3097 continue;
3098 }
3099
3100 status = create_synthetic_smb_fname(talloc_tos(), fname,
3101 stream_info[i].name,
3102 NULL, &smb_fname);
3103 if (!NT_STATUS_IS_OK(status)) {
3104 goto fail;
3105 }
3106
3107 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3108 DEBUG(10, ("Unable to stat stream: %s\n",
3109 smb_fname_str_dbg(smb_fname)));
3110 }
3111
3112 status = SMB_VFS_CREATE_FILE(
3113 conn, /* conn */
3114 NULL, /* req */
3115 0, /* root_dir_fid */
3116 smb_fname, /* fname */
3117 DELETE_ACCESS, /* access_mask */
3118 (FILE_SHARE_READ | /* share_access */
3119 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3120 FILE_OPEN, /* create_disposition*/
3121 0, /* create_options */
3122 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3123 0, /* oplock_request */
3124 0, /* allocation_size */
3125 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3126 NULL, /* sd */
3127 NULL, /* ea_list */
3128 &streams[i], /* result */
3129 NULL); /* pinfo */
3130
3131 if (!NT_STATUS_IS_OK(status)) {
3132 DEBUG(10, ("Could not open stream %s: %s\n",
3133 smb_fname_str_dbg(smb_fname),
3134 nt_errstr(status)));
3135
3136 TALLOC_FREE(smb_fname);
3137 break;
3138 }
3139 TALLOC_FREE(smb_fname);
3140 }
3141
3142 /*
3143 * don't touch the variable "status" beyond this point :-)
3144 */
3145
3146 for (i -= 1 ; i >= 0; i--) {
3147 if (streams[i] == NULL) {
3148 continue;
3149 }
3150
3151 DEBUG(10, ("Closing stream # %d, %s\n", i,
3152 fsp_str_dbg(streams[i])));
3153 close_file(NULL, streams[i], NORMAL_CLOSE);
3154 }
3155
3156 fail:
3157 TALLOC_FREE(frame);
3158 return status;
3159 }
3160
3161 /*
3162 * Wrapper around open_file_ntcreate and open_directory
3163 */
3164
3165 static NTSTATUS create_file_unixpath(connection_struct *conn,
3166 struct smb_request *req,
3167 struct smb_filename *smb_fname,
3168 uint32_t access_mask,
3169 uint32_t share_access,
3170 uint32_t create_disposition,
3171 uint32_t create_options,
3172 uint32_t file_attributes,
3173 uint32_t oplock_request,
3174 uint64_t allocation_size,
3175 uint32_t private_flags,
3176 struct security_descriptor *sd,
3177 struct ea_list *ea_list,
3178
3179 files_struct **result,
3180 int *pinfo)
3181 {
3182 int info = FILE_WAS_OPENED;
3183 files_struct *base_fsp = NULL;
3184 files_struct *fsp = NULL;
3185 NTSTATUS status;
3186
3187 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3188 "file_attributes = 0x%x, share_access = 0x%x, "
3189 "create_disposition = 0x%x create_options = 0x%x "
3190 "oplock_request = 0x%x private_flags = 0x%x "
3191 "ea_list = 0x%p, sd = 0x%p, "
3192 "fname = %s\n",
3193 (unsigned int)access_mask,
3194 (unsigned int)file_attributes,
3195 (unsigned int)share_access,
3196 (unsigned int)create_disposition,
3197 (unsigned int)create_options,
3198 (unsigned int)oplock_request,
3199 (unsigned int)private_flags,
3200 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3201
3202 if (create_options & FILE_OPEN_BY_FILE_ID) {
3203 status = NT_STATUS_NOT_SUPPORTED;
3204 goto fail;
3205 }
3206
3207 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3208 status = NT_STATUS_INVALID_PARAMETER;
3209 goto fail;
3210 }
3211
3212 if (req == NULL) {
3213 oplock_request |= INTERNAL_OPEN_ONLY;
3214 }
3215
3216 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3217 && (access_mask & DELETE_ACCESS)
3218 && !is_ntfs_stream_smb_fname(smb_fname)) {
3219 /*
3220 * We can't open a file with DELETE access if any of the
3221 * streams is open without FILE_SHARE_DELETE
3222 */
3223 status = open_streams_for_delete(conn, smb_fname->base_name);
3224
3225 if (!NT_STATUS_IS_OK(status)) {
3226 goto fail;
3227 }
3228 }
3229
3230 /* This is the correct thing to do (check every time) but can_delete
3231 * is expensive (it may have to read the parent directory
3232 * permissions). So for now we're not doing it unless we have a strong
3233 * hint the client is really going to delete this file. If the client
3234 * is forcing FILE_CREATE let the filesystem take care of the
3235 * permissions. */
3236
3237 /* Setting FILE_SHARE_DELETE is the hint. */
3238
3239 if ((create_disposition != FILE_CREATE)
3240 && (access_mask & DELETE_ACCESS)
3241 && (!(can_delete_file_in_directory(conn, smb_fname) ||
3242 can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
3243 status = NT_STATUS_ACCESS_DENIED;
3244 DEBUG(10,("create_file_unixpath: open file %s "
3245 "for delete ACCESS_DENIED\n",
3246 smb_fname_str_dbg(smb_fname)));
3247 goto fail;
3248 }
3249
3250 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3251 !security_token_has_privilege(get_current_nttok(conn),
3252 SEC_PRIV_SECURITY)) {
3253 DEBUG(10, ("create_file_unixpath: open on %s "
3254 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3255 smb_fname_str_dbg(smb_fname)));
3256 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3257 goto fail;
3258 }
3259
3260 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3261 && is_ntfs_stream_smb_fname(smb_fname)
3262 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3263 uint32 base_create_disposition;
3264 struct smb_filename *smb_fname_base = NULL;
3265
3266 if (create_options & FILE_DIRECTORY_FILE) {
3267 status = NT_STATUS_NOT_A_DIRECTORY;
3268 goto fail;
3269 }
3270
3271 switch (create_disposition) {
3272 case FILE_OPEN:
3273 base_create_disposition = FILE_OPEN;
3274 break;
3275 default:
3276 base_create_disposition = FILE_OPEN_IF;
3277 break;
3278 }
3279
3280 /* Create an smb_filename with stream_name == NULL. */
3281 status = create_synthetic_smb_fname(talloc_tos(),
3282 smb_fname->base_name,
3283 NULL, NULL,
3284 &smb_fname_base);
3285 if (!NT_STATUS_IS_OK(status)) {
3286 goto fail;
3287 }
3288
3289 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3290 DEBUG(10, ("Unable to stat stream: %s\n",
3291 smb_fname_str_dbg(smb_fname_base)));
3292 }
3293
3294 /* Open the base file. */
3295 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3296 FILE_SHARE_READ
3297 | FILE_SHARE_WRITE
3298 | FILE_SHARE_DELETE,
3299 base_create_disposition,
3300 0, 0, 0, 0, 0, NULL, NULL,
3301 &base_fsp, NULL);
3302 TALLOC_FREE(smb_fname_base);
3303
3304 if (!NT_STATUS_IS_OK(status)) {
3305 DEBUG(10, ("create_file_unixpath for base %s failed: "
3306 "%s\n", smb_fname->base_name,
3307 nt_errstr(status)));
3308 goto fail;
3309 }
3310 /* we don't need to low level fd */
3311 fd_close(base_fsp);
3312 }
3313
3314 /*
3315 * If it's a request for a directory open, deal with it separately.
3316 */
3317
3318 if (create_options & FILE_DIRECTORY_FILE) {
3319
3320 if (create_options & FILE_NON_DIRECTORY_FILE) {
3321 status = NT_STATUS_INVALID_PARAMETER;
3322 goto fail;
3323 }
3324
3325 /* Can't open a temp directory. IFS kit test. */
3326 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3327 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3328 status = NT_STATUS_INVALID_PARAMETER;
3329 goto fail;
3330 }
3331
3332 /*
3333 * We will get a create directory here if the Win32
3334 * app specified a security descriptor in the
3335 * CreateDirectory() call.
3336 */
3337
3338 oplock_request = 0;
3339 status = open_directory(
3340 conn, req, smb_fname, access_mask, share_access,
3341 create_disposition, create_options, file_attributes,
3342 &info, &fsp);
3343 } else {
3344
3345 /*
3346 * Ordinary file case.
3347 */
3348
3349 status = file_new(req, conn, &fsp);
3350 if(!NT_STATUS_IS_OK(status)) {
3351 goto fail;
3352 }
3353
3354 status = fsp_set_smb_fname(fsp, smb_fname);
3355 if (!NT_STATUS_IS_OK(status)) {
3356 goto fail;
3357 }
3358
3359 /*
3360 * We're opening the stream element of a base_fsp
3361 * we already opened. Set up the base_fsp pointer.
3362 */
3363 if (base_fsp) {
3364 fsp->base_fsp = base_fsp;
3365 }
3366
3367 status = open_file_ntcreate(conn,
3368 req,
3369 access_mask,
3370 share_access,
3371 create_disposition,
3372 create_options,
3373 file_attributes,
3374 oplock_request,
3375 private_flags,
3376 &info,
3377 fsp);
3378
3379 if(!NT_STATUS_IS_OK(status)) {
3380 file_free(req, fsp);
3381 fsp = NULL;
3382 }
3383
3384 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3385
3386 /* A stream open never opens a directory */
3387
3388 if (base_fsp) {
3389 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3390 goto fail;
3391 }
3392
3393 /*
3394 * Fail the open if it was explicitly a non-directory
3395 * file.
3396 */
3397
3398 if (create_options & FILE_NON_DIRECTORY_FILE) {
3399 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3400 goto fail;
3401 }
3402
3403 oplock_request = 0;
3404 status = open_directory(
3405 conn, req, smb_fname, access_mask,
3406 share_access, create_disposition,
3407 create_options, file_attributes,
3408 &info, &fsp);
3409 }
3410 }
3411
3412 if (!NT_STATUS_IS_OK(status)) {
3413 goto fail;
3414 }
3415
3416 fsp->base_fsp = base_fsp;
3417
3418 /*
3419 * According to the MS documentation, the only time the security
3420 * descriptor is applied to the opened file is iff we *created* the
3421 * file; an existing file stays the same.
3422 *
3423 * Also, it seems (from observation) that you can open the file with
3424 * any access mask but you can still write the sd. We need to override
3425 * the granted access before we call set_sd
3426 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3427 */
3428
3429 if ((sd != NULL) && (info == FILE_WAS_CREATED)
3430 && lp_nt_acl_support(SNUM(conn))) {
3431
3432 uint32_t sec_info_sent;
3433 uint32_t saved_access_mask = fsp->access_mask;
3434
3435 sec_info_sent = get_sec_info(sd);
3436
3437 fsp->access_mask = FILE_GENERIC_ALL;
3438
3439 /* Convert all the generic bits. */
3440 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3441 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3442
3443 if (sec_info_sent & (SECINFO_OWNER|
3444 SECINFO_GROUP|
3445 SECINFO_DACL|
3446 SECINFO_SACL)) {
3447 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3448 }
3449
3450 fsp->access_mask = saved_access_mask;
3451
3452 if (!NT_STATUS_IS_OK(status)) {
3453 goto fail;
3454 }
3455 }
3456
3457 if ((ea_list != NULL) &&
3458 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3459 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3460 if (!NT_STATUS_IS_OK(status)) {
3461 goto fail;
3462 }
3463 }
3464
3465 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3466 status = NT_STATUS_ACCESS_DENIED;
3467 goto fail;
3468 }
3469
3470 /* Save the requested allocation size. */
3471 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3472 if (allocation_size
3473 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3474 fsp->initial_allocation_size = smb_roundup(
3475 fsp->conn, allocation_size);
3476 if (fsp->is_directory) {
3477 /* Can't set allocation size on a directory. */
3478 status = NT_STATUS_ACCESS_DENIED;
3479 goto fail;
3480 }
3481 if (vfs_allocate_file_space(
3482 fsp, fsp->initial_allocation_size) == -1) {
3483 status = NT_STATUS_DISK_FULL;
3484 goto fail;
3485 }
3486 } else {
3487 fsp->initial_allocation_size = smb_roundup(
3488 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3489 }
3490 }
3491
3492 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3493
3494 *result = fsp;
3495 if (pinfo != NULL) {
3496 *pinfo = info;
3497 }
3498
3499 smb_fname->st = fsp->fsp_name->st;
3500
3501 return NT_STATUS_OK;
3502
3503 fail:
3504 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3505
3506 if (fsp != NULL) {
3507 if (base_fsp && fsp->base_fsp == base_fsp) {
3508 /*
3509 * The close_file below will close
3510 * fsp->base_fsp.
3511 */
3512 base_fsp = NULL;
3513 }
3514 close_file(req, fsp, ERROR_CLOSE);
3515 fsp = NULL;
3516 }
3517 if (base_fsp != NULL) {
3518 close_file(req, base_fsp, ERROR_CLOSE);
3519 base_fsp = NULL;
3520 }
3521 return status;
3522 }
3523
3524 /*
3525 * Calculate the full path name given a relative fid.
3526 */
3527 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3528 struct smb_request *req,
3529 uint16_t root_dir_fid,
3530 const struct smb_filename *smb_fname,
3531 struct smb_filename **smb_fname_out)
3532 {
3533 files_struct *dir_fsp;
3534 char *parent_fname = NULL;
3535 char *new_base_name = NULL;
3536 NTSTATUS status;
3537
3538 if (root_dir_fid == 0 || !smb_fname) {
3539 status = NT_STATUS_INTERNAL_ERROR;
3540 goto out;
3541 }
3542
3543 dir_fsp = file_fsp(req, root_dir_fid);
3544
3545 if (dir_fsp == NULL) {
3546 status = NT_STATUS_INVALID_HANDLE;
3547 goto out;
3548 }
3549
3550 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3551 status = NT_STATUS_INVALID_HANDLE;
3552 goto out;
3553 }
3554
3555 if (!dir_fsp->is_directory) {
3556
3557 /*
3558 * Check to see if this is a mac fork of some kind.
3559 */
3560
3561 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3562 is_ntfs_stream_smb_fname(smb_fname)) {
3563 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3564 goto out;
3565 }
3566
3567 /*
3568 we need to handle the case when we get a
3569 relative open relative to a file and the
3570 pathname is blank - this is a reopen!
3571 (hint from demyn plantenberg)
3572 */
3573
3574 status = NT_STATUS_INVALID_HANDLE;
3575 goto out;
3576 }
3577
3578 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3579 /*
3580 * We're at the toplevel dir, the final file name
3581 * must not contain ./, as this is filtered out
3582 * normally by srvstr_get_path and unix_convert
3583 * explicitly rejects paths containing ./.
3584 */
3585 parent_fname = talloc_strdup(talloc_tos(), "");
3586 if (parent_fname == NULL) {
3587 status = NT_STATUS_NO_MEMORY;
3588 goto out;
3589 }
3590 } else {
3591 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3592
3593 /*
3594 * Copy in the base directory name.
3595 */
3596
3597 parent_fname = talloc_array(talloc_tos(), char,
3598 dir_name_len+2);
3599 if (parent_fname == NULL) {
3600 status = NT_STATUS_NO_MEMORY;
3601 goto out;
3602 }
3603 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3604 dir_name_len+1);
3605
3606 /*
3607 * Ensure it ends in a '/'.
3608 * We used TALLOC_SIZE +2 to add space for the '/'.
3609 */
3610
3611 if(dir_name_len
3612 && (parent_fname[dir_name_len-1] != '\\')
3613 && (parent_fname[dir_name_len-1] != '/')) {
3614 parent_fname[dir_name_len] = '/';
3615 parent_fname[dir_name_len+1] = '\0';
3616 }
3617 }
3618
3619 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3620 smb_fname->base_name);
3621 if (new_base_name == NULL) {
3622 status = NT_STATUS_NO_MEMORY;
3623 goto out;
3624 }
3625
3626 status = filename_convert(req,
3627 conn,
3628 req->flags2 & FLAGS2_DFS_PATHNAMES,
3629 new_base_name,
3630 0,
3631 NULL,
3632 smb_fname_out);
3633 if (!NT_STATUS_IS_OK(status)) {
3634 goto out;
3635 }
3636
3637 out:
3638 TALLOC_FREE(parent_fname);
3639 TALLOC_FREE(new_base_name);
3640 return status;
3641 }
3642
3643 NTSTATUS create_file_default(connection_struct *conn,
3644 struct smb_request *req,
3645 uint16_t root_dir_fid,
3646 struct smb_filename *smb_fname,
3647 uint32_t access_mask,
3648 uint32_t share_access,
3649 uint32_t create_disposition,
3650 uint32_t create_options,
3651 uint32_t file_attributes,
3652 uint32_t oplock_request,
3653 uint64_t allocation_size,
3654 uint32_t private_flags,
3655 struct security_descriptor *sd,
3656 struct ea_list *ea_list,
3657 files_struct **result,
3658 int *pinfo)
3659 {
3660 int info = FILE_WAS_OPENED;
3661 files_struct *fsp = NULL;
3662 NTSTATUS status;
3663 bool stream_name = false;
3664
3665 DEBUG(10,("create_file: access_mask = 0x%x "
3666 "file_attributes = 0x%x, share_access = 0x%x, "
3667 "create_disposition = 0x%x create_options = 0x%x "
3668 "oplock_request = 0x%x "
3669 "private_flags = 0x%x "
3670 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3671 "fname = %s\n",
3672 (unsigned int)access_mask,
3673 (unsigned int)file_attributes,
3674 (unsigned int)share_access,
3675 (unsigned int)create_disposition,
3676 (unsigned int)create_options,
3677 (unsigned int)oplock_request,
3678 (unsigned int)private_flags,
3679 (unsigned int)root_dir_fid,
3680 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3681
3682 /*
3683 * Calculate the filename from the root_dir_if if necessary.
3684 */
3685
3686 if (root_dir_fid != 0) {
3687 struct smb_filename *smb_fname_out = NULL;
3688 status = get_relative_fid_filename(conn, req, root_dir_fid,
3689 smb_fname, &smb_fname_out);
3690 if (!NT_STATUS_IS_OK(status)) {
3691 goto fail;
3692 }
3693 smb_fname = smb_fname_out;
3694 }
3695
3696 /*
3697 * Check to see if this is a mac fork of some kind.
3698 */
3699
3700 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3701 if (stream_name) {
3702 enum FAKE_FILE_TYPE fake_file_type;
3703
3704 fake_file_type = is_fake_file(smb_fname);
3705
3706 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3707
3708 /*
3709 * Here we go! support for changing the disk quotas
3710 * --metze
3711 *
3712 * We need to fake up to open this MAGIC QUOTA file
3713 * and return a valid FID.
3714 *
3715 * w2k close this file directly after openening xp
3716 * also tries a QUERY_FILE_INFO on the file and then
3717 * close it
3718 */
3719 status = open_fake_file(req, conn, req->vuid,
3720 fake_file_type, smb_fname,
3721 access_mask, &fsp);
3722 if (!NT_STATUS_IS_OK(status)) {
3723 goto fail;
3724 }
3725
3726 ZERO_STRUCT(smb_fname->st);
3727 goto done;
3728 }
3729
3730 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3731 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3732 goto fail;
3733 }
3734 }
3735
3736 /* All file access must go through check_name() */
3737
3738 status = check_name(conn, smb_fname->base_name);
3739 if (!NT_STATUS_IS_OK(status)) {
3740 goto fail;
3741 }
3742
3743 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3744 int ret;
3745 smb_fname->stream_name = NULL;
3746 /* We have to handle this error here. */
3747 if (create_options & FILE_DIRECTORY_FILE) {
3748 status = NT_STATUS_NOT_A_DIRECTORY;
3749 goto fail;
3750 }
3751 if (lp_posix_pathnames()) {
3752 ret = SMB_VFS_LSTAT(conn, smb_fname);
3753 } else {
3754 ret = SMB_VFS_STAT(conn, smb_fname);
3755 }
3756
3757 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3758 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3759 goto fail;
3760 }
3761 }
3762
3763 status = create_file_unixpath(
3764 conn, req, smb_fname, access_mask, share_access,
3765 create_disposition, create_options, file_attributes,
3766 oplock_request, allocation_size, private_flags,
3767 sd, ea_list,
3768 &fsp, &info);
3769
3770 if (!NT_STATUS_IS_OK(status)) {
3771 goto fail;
3772 }
3773
3774 done:
3775 DEBUG(10, ("create_file: info=%d\n", info));
3776
3777 *result = fsp;
3778 if (pinfo != NULL) {
3779 *pinfo = info;
3780 }
3781 return NT_STATUS_OK;
3782
3783 fail:
3784 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3785
3786 if (fsp != NULL) {
3787 close_file(req, fsp, ERROR_CLOSE);
3788 fsp = NULL;
3789 }
3790 return status;
3791 }
reg import