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Fix bug #8972 - Directory group write permission bit is set if unix extensions are...
[Samba.git] / source3 / smbd / open.c
blob72b7d8e42d292117bdad1b2d81ad61f012f79602
1 /*
2 Unix SMB/CIFS implementation.
3 file opening and share modes
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2004
6 Copyright (C) Volker Lendecke 2005
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "system/filesys.h"
24 #include "printing.h"
25 #include "smbd/smbd.h"
26 #include "smbd/globals.h"
27 #include "fake_file.h"
28 #include "../libcli/security/security.h"
29 #include "../librpc/gen_ndr/ndr_security.h"
30 #include "auth.h"
31 #include "messages.h"
32
33 extern const struct generic_mapping file_generic_mapping;
34
35 struct deferred_open_record {
36 bool delayed_for_oplocks;
37 struct file_id id;
38 };
39
40 /****************************************************************************
41 SMB1 file varient of se_access_check. Never test FILE_READ_ATTRIBUTES.
42 ****************************************************************************/
43
44 NTSTATUS smb1_file_se_access_check(struct connection_struct *conn,
45 const struct security_descriptor *sd,
46 const struct security_token *token,
47 uint32_t access_desired,
48 uint32_t *access_granted)
49 {
50 *access_granted = 0;
51
52 if (get_current_uid(conn) == (uid_t)0) {
53 /* I'm sorry sir, I didn't know you were root... */
54 *access_granted = access_desired;
55 if (access_desired & SEC_FLAG_MAXIMUM_ALLOWED) {
56 *access_granted |= FILE_GENERIC_ALL;
57 }
58 return NT_STATUS_OK;
59 }
60
61 return se_access_check(sd,
62 token,
63 (access_desired & ~FILE_READ_ATTRIBUTES),
64 access_granted);
65 }
66
67 /****************************************************************************
68 Check if we have open rights.
69 ****************************************************************************/
70
71 NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
72 const struct smb_filename *smb_fname,
73 uint32_t access_mask,
74 uint32_t *access_granted)
75 {
76 /* Check if we have rights to open. */
77 NTSTATUS status;
78 struct security_descriptor *sd = NULL;
79 uint32_t rejected_share_access;
80
81 rejected_share_access = access_mask & ~(conn->share_access);
82
83 if (rejected_share_access) {
84 *access_granted = rejected_share_access;
85 return NT_STATUS_ACCESS_DENIED;
86 }
87
88 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
89 *access_granted = access_mask;
90
91 DEBUG(10,("smbd_check_open_rights: not checking ACL "
92 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
93 smb_fname_str_dbg(smb_fname),
94 (unsigned int)*access_granted ));
95 return NT_STATUS_OK;
96 }
97
98 if (access_mask == DELETE_ACCESS &&
99 VALID_STAT(smb_fname->st) &&
100 S_ISLNK(smb_fname->st.st_ex_mode)) {
101 /* We can always delete a symlink. */
102 DEBUG(10,("smbd_check_open_rights: not checking ACL "
103 "on DELETE_ACCESS on symlink %s.\n",
104 smb_fname_str_dbg(smb_fname) ));
105 return NT_STATUS_OK;
106 }
107
108 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
109 (SECINFO_OWNER |
110 SECINFO_GROUP |
111 SECINFO_DACL),&sd);
112
113 if (!NT_STATUS_IS_OK(status)) {
114 DEBUG(10, ("smbd_check_open_rights: Could not get acl "
115 "on %s: %s\n",
116 smb_fname_str_dbg(smb_fname),
117 nt_errstr(status)));
118 return status;
119 }
120
121 status = smb1_file_se_access_check(conn,
122 sd,
123 get_current_nttok(conn),
124 access_mask,
125 access_granted);
126
127 DEBUG(10,("smbd_check_open_rights: file %s requesting "
128 "0x%x returning 0x%x (%s)\n",
129 smb_fname_str_dbg(smb_fname),
130 (unsigned int)access_mask,
131 (unsigned int)*access_granted,
132 nt_errstr(status) ));
133
134 if (!NT_STATUS_IS_OK(status)) {
135 if (DEBUGLEVEL >= 10) {
136 DEBUG(10,("smbd_check_open_rights: acl for %s is:\n",
137 smb_fname_str_dbg(smb_fname) ));
138 NDR_PRINT_DEBUG(security_descriptor, sd);
139 }
140 }
141
142 TALLOC_FREE(sd);
143
144 return status;
145 }
146
147 /****************************************************************************
148 fd support routines - attempt to do a dos_open.
149 ****************************************************************************/
150
151 static NTSTATUS fd_open(struct connection_struct *conn,
152 files_struct *fsp,
153 int flags,
154 mode_t mode)
155 {
156 struct smb_filename *smb_fname = fsp->fsp_name;
157 NTSTATUS status = NT_STATUS_OK;
158
159 #ifdef O_NOFOLLOW
160 /*
161 * Never follow symlinks on a POSIX client. The
162 * client should be doing this.
163 */
164
165 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
166 flags |= O_NOFOLLOW;
167 }
168 #endif
169
170 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
171 if (fsp->fh->fd == -1) {
172 status = map_nt_error_from_unix(errno);
173 if (errno == EMFILE) {
174 static time_t last_warned = 0L;
175
176 if (time((time_t *) NULL) > last_warned) {
177 DEBUG(0,("Too many open files, unable "
178 "to open more! smbd's max "
179 "open files = %d\n",
180 lp_max_open_files()));
181 last_warned = time((time_t *) NULL);
182 }
183 }
184
185 }
186
187 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
188 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
189 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
190
191 return status;
192 }
193
194 /****************************************************************************
195 Close the file associated with a fsp.
196 ****************************************************************************/
197
198 NTSTATUS fd_close(files_struct *fsp)
199 {
200 int ret;
201
202 if (fsp->dptr) {
203 dptr_CloseDir(fsp);
204 }
205 if (fsp->fh->fd == -1) {
206 return NT_STATUS_OK; /* What we used to call a stat open. */
207 }
208 if (fsp->fh->ref_count > 1) {
209 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
210 }
211
212 ret = SMB_VFS_CLOSE(fsp);
213 fsp->fh->fd = -1;
214 if (ret == -1) {
215 return map_nt_error_from_unix(errno);
216 }
217 return NT_STATUS_OK;
218 }
219
220 /****************************************************************************
221 Change the ownership of a file to that of the parent directory.
222 Do this by fd if possible.
223 ****************************************************************************/
224
225 void change_file_owner_to_parent(connection_struct *conn,
226 const char *inherit_from_dir,
227 files_struct *fsp)
228 {
229 struct smb_filename *smb_fname_parent = NULL;
230 NTSTATUS status;
231 int ret;
232
233 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
234 NULL, NULL, &smb_fname_parent);
235 if (!NT_STATUS_IS_OK(status)) {
236 return;
237 }
238
239 ret = SMB_VFS_STAT(conn, smb_fname_parent);
240 if (ret == -1) {
241 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
242 "directory %s. Error was %s\n",
243 smb_fname_str_dbg(smb_fname_parent),
244 strerror(errno)));
245 TALLOC_FREE(smb_fname_parent);
246 return;
247 }
248
249 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
250 /* Already this uid - no need to change. */
251 DEBUG(10,("change_file_owner_to_parent: file %s "
252 "is already owned by uid %d\n",
253 fsp_str_dbg(fsp),
254 (int)fsp->fsp_name->st.st_ex_uid ));
255 TALLOC_FREE(smb_fname_parent);
256 return;
257 }
258
259 become_root();
260 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
261 unbecome_root();
262 if (ret == -1) {
263 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
264 "file %s to parent directory uid %u. Error "
265 "was %s\n", fsp_str_dbg(fsp),
266 (unsigned int)smb_fname_parent->st.st_ex_uid,
267 strerror(errno) ));
268 } else {
269 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
270 "parent directory uid %u.\n", fsp_str_dbg(fsp),
271 (unsigned int)smb_fname_parent->st.st_ex_uid));
272 /* Ensure the uid entry is updated. */
273 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
274 }
275
276 TALLOC_FREE(smb_fname_parent);
277 }
278
279 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
280 const char *inherit_from_dir,
281 const char *fname,
282 SMB_STRUCT_STAT *psbuf)
283 {
284 struct smb_filename *smb_fname_parent = NULL;
285 struct smb_filename *smb_fname_cwd = NULL;
286 char *saved_dir = NULL;
287 TALLOC_CTX *ctx = talloc_tos();
288 NTSTATUS status = NT_STATUS_OK;
289 int ret;
290
291 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
292 &smb_fname_parent);
293 if (!NT_STATUS_IS_OK(status)) {
294 return status;
295 }
296
297 ret = SMB_VFS_STAT(conn, smb_fname_parent);
298 if (ret == -1) {
299 status = map_nt_error_from_unix(errno);
300 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
301 "directory %s. Error was %s\n",
302 smb_fname_str_dbg(smb_fname_parent),
303 strerror(errno)));
304 goto out;
305 }
306
307 /* We've already done an lstat into psbuf, and we know it's a
308 directory. If we can cd into the directory and the dev/ino
309 are the same then we can safely chown without races as
310 we're locking the directory in place by being in it. This
311 should work on any UNIX (thanks tridge :-). JRA.
312 */
313
314 saved_dir = vfs_GetWd(ctx,conn);
315 if (!saved_dir) {
316 status = map_nt_error_from_unix(errno);
317 DEBUG(0,("change_dir_owner_to_parent: failed to get "
318 "current working directory. Error was %s\n",
319 strerror(errno)));
320 goto out;
321 }
322
323 /* Chdir into the new path. */
324 if (vfs_ChDir(conn, fname) == -1) {
325 status = map_nt_error_from_unix(errno);
326 DEBUG(0,("change_dir_owner_to_parent: failed to change "
327 "current working directory to %s. Error "
328 "was %s\n", fname, strerror(errno) ));
329 goto chdir;
330 }
331
332 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
333 &smb_fname_cwd);
334 if (!NT_STATUS_IS_OK(status)) {
335 return status;
336 }
337
338 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
339 if (ret == -1) {
340 status = map_nt_error_from_unix(errno);
341 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
342 "directory '.' (%s) Error was %s\n",
343 fname, strerror(errno)));
344 goto chdir;
345 }
346
347 /* Ensure we're pointing at the same place. */
348 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
349 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
350 DEBUG(0,("change_dir_owner_to_parent: "
351 "device/inode on directory %s changed. "
352 "Refusing to chown !\n", fname ));
353 status = NT_STATUS_ACCESS_DENIED;
354 goto chdir;
355 }
356
357 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
358 /* Already this uid - no need to change. */
359 DEBUG(10,("change_dir_owner_to_parent: directory %s "
360 "is already owned by uid %d\n",
361 fname,
362 (int)smb_fname_cwd->st.st_ex_uid ));
363 status = NT_STATUS_OK;
364 goto chdir;
365 }
366
367 become_root();
368 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
369 (gid_t)-1);
370 unbecome_root();
371 if (ret == -1) {
372 status = map_nt_error_from_unix(errno);
373 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
374 "directory %s to parent directory uid %u. "
375 "Error was %s\n", fname,
376 (unsigned int)smb_fname_parent->st.st_ex_uid,
377 strerror(errno) ));
378 goto chdir;
379 }
380
381 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
382 "directory %s to parent directory uid %u.\n",
383 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
384
385 chdir:
386 vfs_ChDir(conn,saved_dir);
387 out:
388 TALLOC_FREE(smb_fname_parent);
389 TALLOC_FREE(smb_fname_cwd);
390 return status;
391 }
392
393 /****************************************************************************
394 Open a file.
395 ****************************************************************************/
396
397 static NTSTATUS open_file(files_struct *fsp,
398 connection_struct *conn,
399 struct smb_request *req,
400 const char *parent_dir,
401 int flags,
402 mode_t unx_mode,
403 uint32 access_mask, /* client requested access mask. */
404 uint32 open_access_mask) /* what we're actually using in the open. */
405 {
406 struct smb_filename *smb_fname = fsp->fsp_name;
407 NTSTATUS status = NT_STATUS_OK;
408 int accmode = (flags & O_ACCMODE);
409 int local_flags = flags;
410 bool file_existed = VALID_STAT(fsp->fsp_name->st);
411 bool file_created = false;
412
413 fsp->fh->fd = -1;
414 errno = EPERM;
415
416 /* Check permissions */
417
418 /*
419 * This code was changed after seeing a client open request
420 * containing the open mode of (DENY_WRITE/read-only) with
421 * the 'create if not exist' bit set. The previous code
422 * would fail to open the file read only on a read-only share
423 * as it was checking the flags parameter directly against O_RDONLY,
424 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
425 * JRA.
426 */
427
428 if (!CAN_WRITE(conn)) {
429 /* It's a read-only share - fail if we wanted to write. */
430 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
431 DEBUG(3,("Permission denied opening %s\n",
432 smb_fname_str_dbg(smb_fname)));
433 return NT_STATUS_ACCESS_DENIED;
434 } else if(flags & O_CREAT) {
435 /* We don't want to write - but we must make sure that
436 O_CREAT doesn't create the file if we have write
437 access into the directory.
438 */
439 flags &= ~(O_CREAT|O_EXCL);
440 local_flags &= ~(O_CREAT|O_EXCL);
441 }
442 }
443
444 /*
445 * This little piece of insanity is inspired by the
446 * fact that an NT client can open a file for O_RDONLY,
447 * but set the create disposition to FILE_EXISTS_TRUNCATE.
448 * If the client *can* write to the file, then it expects to
449 * truncate the file, even though it is opening for readonly.
450 * Quicken uses this stupid trick in backup file creation...
451 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
452 * for helping track this one down. It didn't bite us in 2.0.x
453 * as we always opened files read-write in that release. JRA.
454 */
455
456 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
457 DEBUG(10,("open_file: truncate requested on read-only open "
458 "for file %s\n", smb_fname_str_dbg(smb_fname)));
459 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
460 }
461
462 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
463 (!file_existed && (local_flags & O_CREAT)) ||
464 ((local_flags & O_TRUNC) == O_TRUNC) ) {
465 const char *wild;
466
467 /*
468 * We can't actually truncate here as the file may be locked.
469 * open_file_ntcreate will take care of the truncate later. JRA.
470 */
471
472 local_flags &= ~O_TRUNC;
473
474 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
475 /*
476 * We would block on opening a FIFO with no one else on the
477 * other end. Do what we used to do and add O_NONBLOCK to the
478 * open flags. JRA.
479 */
480
481 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
482 local_flags |= O_NONBLOCK;
483 }
484 #endif
485
486 /* Don't create files with Microsoft wildcard characters. */
487 if (fsp->base_fsp) {
488 /*
489 * wildcard characters are allowed in stream names
490 * only test the basefilename
491 */
492 wild = fsp->base_fsp->fsp_name->base_name;
493 } else {
494 wild = smb_fname->base_name;
495 }
496 if ((local_flags & O_CREAT) && !file_existed &&
497 ms_has_wild(wild)) {
498 return NT_STATUS_OBJECT_NAME_INVALID;
499 }
500
501 /* Actually do the open */
502 status = fd_open(conn, fsp, local_flags, unx_mode);
503 if (!NT_STATUS_IS_OK(status)) {
504 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
505 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
506 nt_errstr(status),local_flags,flags));
507 return status;
508 }
509
510 if ((local_flags & O_CREAT) && !file_existed) {
511 file_created = true;
512 }
513
514 } else {
515 fsp->fh->fd = -1; /* What we used to call a stat open. */
516 if (file_existed) {
517 uint32_t access_granted = 0;
518
519 status = smbd_check_open_rights(conn,
520 smb_fname,
521 access_mask,
522 &access_granted);
523 if (!NT_STATUS_IS_OK(status)) {
524 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
525 /*
526 * On NT_STATUS_ACCESS_DENIED, access_granted
527 * contains the denied bits.
528 */
529
530 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
531 (access_granted & FILE_WRITE_ATTRIBUTES) &&
532 (lp_map_readonly(SNUM(conn)) ||
533 lp_map_archive(SNUM(conn)) ||
534 lp_map_hidden(SNUM(conn)) ||
535 lp_map_system(SNUM(conn)))) {
536 access_granted &= ~FILE_WRITE_ATTRIBUTES;
537
538 DEBUG(10,("open_file: "
539 "overrode "
540 "FILE_WRITE_"
541 "ATTRIBUTES "
542 "on file %s\n",
543 smb_fname_str_dbg(
544 smb_fname)));
545 }
546
547 if ((access_mask & DELETE_ACCESS) &&
548 (access_granted & DELETE_ACCESS) &&
549 can_delete_file_in_directory(conn,
550 smb_fname)) {
551 /* Were we trying to do a stat open
552 * for delete and didn't get DELETE
553 * access (only) ? Check if the
554 * directory allows DELETE_CHILD.
555 * See here:
556 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
557 * for details. */
558
559 access_granted &= ~DELETE_ACCESS;
560
561 DEBUG(10,("open_file: "
562 "overrode "
563 "DELETE_ACCESS on "
564 "file %s\n",
565 smb_fname_str_dbg(
566 smb_fname)));
567 }
568
569 if (access_granted != 0) {
570 DEBUG(10,("open_file: Access "
571 "denied on file "
572 "%s\n",
573 smb_fname_str_dbg(
574 smb_fname)));
575 return status;
576 }
577 } else if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
578 fsp->posix_open &&
579 S_ISLNK(smb_fname->st.st_ex_mode)) {
580 /* This is a POSIX stat open for delete
581 * or rename on a symlink that points
582 * nowhere. Allow. */
583 DEBUG(10,("open_file: allowing POSIX "
584 "open on bad symlink %s\n",
585 smb_fname_str_dbg(
586 smb_fname)));
587 } else {
588 DEBUG(10,("open_file: "
589 "smbd_check_open_rights on file "
590 "%s returned %s\n",
591 smb_fname_str_dbg(smb_fname),
592 nt_errstr(status) ));
593 return status;
594 }
595 }
596 }
597 }
598
599 if (!file_existed) {
600 int ret;
601
602 if (fsp->fh->fd == -1) {
603 ret = SMB_VFS_STAT(conn, smb_fname);
604 } else {
605 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
606 /* If we have an fd, this stat should succeed. */
607 if (ret == -1) {
608 DEBUG(0,("Error doing fstat on open file %s "
609 "(%s)\n",
610 smb_fname_str_dbg(smb_fname),
611 strerror(errno) ));
612 }
613 }
614
615 /* For a non-io open, this stat failing means file not found. JRA */
616 if (ret == -1) {
617 status = map_nt_error_from_unix(errno);
618 fd_close(fsp);
619 return status;
620 }
621
622 if (file_created) {
623 bool need_re_stat = false;
624 /* Do all inheritance work after we've
625 done a successful stat call and filled
626 in the stat struct in fsp->fsp_name. */
627
628 /* Inherit the ACL if required */
629 if (lp_inherit_perms(SNUM(conn))) {
630 inherit_access_posix_acl(conn, parent_dir,
631 smb_fname->base_name,
632 unx_mode);
633 need_re_stat = true;
634 }
635
636 /* Change the owner if required. */
637 if (lp_inherit_owner(SNUM(conn))) {
638 change_file_owner_to_parent(conn, parent_dir,
639 fsp);
640 need_re_stat = true;
641 }
642
643 if (need_re_stat) {
644 if (fsp->fh->fd == -1) {
645 ret = SMB_VFS_STAT(conn, smb_fname);
646 } else {
647 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
648 /* If we have an fd, this stat should succeed. */
649 if (ret == -1) {
650 DEBUG(0,("Error doing fstat on open file %s "
651 "(%s)\n",
652 smb_fname_str_dbg(smb_fname),
653 strerror(errno) ));
654 }
655 }
656 }
657
658 notify_fname(conn, NOTIFY_ACTION_ADDED,
659 FILE_NOTIFY_CHANGE_FILE_NAME,
660 smb_fname->base_name);
661 }
662 }
663
664 /*
665 * POSIX allows read-only opens of directories. We don't
666 * want to do this (we use a different code path for this)
667 * so catch a directory open and return an EISDIR. JRA.
668 */
669
670 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
671 fd_close(fsp);
672 errno = EISDIR;
673 return NT_STATUS_FILE_IS_A_DIRECTORY;
674 }
675
676 fsp->mode = smb_fname->st.st_ex_mode;
677 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
678 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
679 fsp->file_pid = req ? req->smbpid : 0;
680 fsp->can_lock = True;
681 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
682 if (!CAN_WRITE(conn)) {
683 fsp->can_write = False;
684 } else {
685 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
686 True : False;
687 }
688 fsp->print_file = NULL;
689 fsp->modified = False;
690 fsp->sent_oplock_break = NO_BREAK_SENT;
691 fsp->is_directory = False;
692 if (conn->aio_write_behind_list &&
693 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
694 conn->case_sensitive)) {
695 fsp->aio_write_behind = True;
696 }
697
698 fsp->wcp = NULL; /* Write cache pointer. */
699
700 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
701 conn->session_info->unix_name,
702 smb_fname_str_dbg(smb_fname),
703 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
704 conn->num_files_open));
705
706 errno = 0;
707 return NT_STATUS_OK;
708 }
709
710 /****************************************************************************
711 Check if we can open a file with a share mode.
712 Returns True if conflict, False if not.
713 ****************************************************************************/
714
715 static bool share_conflict(struct share_mode_entry *entry,
716 uint32 access_mask,
717 uint32 share_access)
718 {
719 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
720 "entry->share_access = 0x%x, "
721 "entry->private_options = 0x%x\n",
722 (unsigned int)entry->access_mask,
723 (unsigned int)entry->share_access,
724 (unsigned int)entry->private_options));
725
726 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
727 (unsigned int)access_mask, (unsigned int)share_access));
728
729 if ((entry->access_mask & (FILE_WRITE_DATA|
730 FILE_APPEND_DATA|
731 FILE_READ_DATA|
732 FILE_EXECUTE|
733 DELETE_ACCESS)) == 0) {
734 DEBUG(10,("share_conflict: No conflict due to "
735 "entry->access_mask = 0x%x\n",
736 (unsigned int)entry->access_mask ));
737 return False;
738 }
739
740 if ((access_mask & (FILE_WRITE_DATA|
741 FILE_APPEND_DATA|
742 FILE_READ_DATA|
743 FILE_EXECUTE|
744 DELETE_ACCESS)) == 0) {
745 DEBUG(10,("share_conflict: No conflict due to "
746 "access_mask = 0x%x\n",
747 (unsigned int)access_mask ));
748 return False;
749 }
750
751 #if 1 /* JRA TEST - Superdebug. */
752 #define CHECK_MASK(num, am, right, sa, share) \
753 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
754 (unsigned int)(num), (unsigned int)(am), \
755 (unsigned int)(right), (unsigned int)(am)&(right) )); \
756 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
757 (unsigned int)(num), (unsigned int)(sa), \
758 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
759 if (((am) & (right)) && !((sa) & (share))) { \
760 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
761 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
762 (unsigned int)(share) )); \
763 return True; \
764 }
765 #else
766 #define CHECK_MASK(num, am, right, sa, share) \
767 if (((am) & (right)) && !((sa) & (share))) { \
768 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
769 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
770 (unsigned int)(share) )); \
771 return True; \
772 }
773 #endif
774
775 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
776 share_access, FILE_SHARE_WRITE);
777 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
778 entry->share_access, FILE_SHARE_WRITE);
779
780 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
781 share_access, FILE_SHARE_READ);
782 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
783 entry->share_access, FILE_SHARE_READ);
784
785 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
786 share_access, FILE_SHARE_DELETE);
787 CHECK_MASK(6, access_mask, DELETE_ACCESS,
788 entry->share_access, FILE_SHARE_DELETE);
789
790 DEBUG(10,("share_conflict: No conflict.\n"));
791 return False;
792 }
793
794 #if defined(DEVELOPER)
795 static void validate_my_share_entries(struct smbd_server_connection *sconn,
796 int num,
797 struct share_mode_entry *share_entry)
798 {
799 files_struct *fsp;
800
801 if (!procid_is_me(&share_entry->pid)) {
802 return;
803 }
804
805 if (is_deferred_open_entry(share_entry) &&
806 !open_was_deferred(share_entry->op_mid)) {
807 char *str = talloc_asprintf(talloc_tos(),
808 "Got a deferred entry without a request: "
809 "PANIC: %s\n",
810 share_mode_str(talloc_tos(), num, share_entry));
811 smb_panic(str);
812 }
813
814 if (!is_valid_share_mode_entry(share_entry)) {
815 return;
816 }
817
818 fsp = file_find_dif(sconn, share_entry->id,
819 share_entry->share_file_id);
820 if (!fsp) {
821 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
822 share_mode_str(talloc_tos(), num, share_entry) ));
823 smb_panic("validate_my_share_entries: Cannot match a "
824 "share entry with an open file\n");
825 }
826
827 if (is_deferred_open_entry(share_entry) ||
828 is_unused_share_mode_entry(share_entry)) {
829 goto panic;
830 }
831
832 if ((share_entry->op_type == NO_OPLOCK) &&
833 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
834 /* Someone has already written to it, but I haven't yet
835 * noticed */
836 return;
837 }
838
839 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
840 goto panic;
841 }
842
843 return;
844
845 panic:
846 {
847 char *str;
848 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
849 share_mode_str(talloc_tos(), num, share_entry) ));
850 str = talloc_asprintf(talloc_tos(),
851 "validate_my_share_entries: "
852 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
853 fsp->fsp_name->base_name,
854 (unsigned int)fsp->oplock_type,
855 (unsigned int)share_entry->op_type );
856 smb_panic(str);
857 }
858 }
859 #endif
860
861 bool is_stat_open(uint32 access_mask)
862 {
863 return (access_mask &&
864 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
865 FILE_WRITE_ATTRIBUTES))==0) &&
866 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
867 FILE_WRITE_ATTRIBUTES)) != 0));
868 }
869
870 /****************************************************************************
871 Deal with share modes
872 Invarient: Share mode must be locked on entry and exit.
873 Returns -1 on error, or number of share modes on success (may be zero).
874 ****************************************************************************/
875
876 static NTSTATUS open_mode_check(connection_struct *conn,
877 struct share_mode_lock *lck,
878 uint32_t name_hash,
879 uint32 access_mask,
880 uint32 share_access,
881 uint32 create_options,
882 bool *file_existed)
883 {
884 int i;
885
886 if(lck->num_share_modes == 0) {
887 return NT_STATUS_OK;
888 }
889
890 *file_existed = True;
891
892 /* A delete on close prohibits everything */
893
894 if (is_delete_on_close_set(lck, name_hash)) {
895 return NT_STATUS_DELETE_PENDING;
896 }
897
898 if (is_stat_open(access_mask)) {
899 /* Stat open that doesn't trigger oplock breaks or share mode
900 * checks... ! JRA. */
901 return NT_STATUS_OK;
902 }
903
904 /*
905 * Check if the share modes will give us access.
906 */
907
908 #if defined(DEVELOPER)
909 for(i = 0; i < lck->num_share_modes; i++) {
910 validate_my_share_entries(conn->sconn, i,
911 &lck->share_modes[i]);
912 }
913 #endif
914
915 if (!lp_share_modes(SNUM(conn))) {
916 return NT_STATUS_OK;
917 }
918
919 /* Now we check the share modes, after any oplock breaks. */
920 for(i = 0; i < lck->num_share_modes; i++) {
921
922 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
923 continue;
924 }
925
926 /* someone else has a share lock on it, check to see if we can
927 * too */
928 if (share_conflict(&lck->share_modes[i],
929 access_mask, share_access)) {
930 return NT_STATUS_SHARING_VIOLATION;
931 }
932 }
933
934 return NT_STATUS_OK;
935 }
936
937 static bool is_delete_request(files_struct *fsp) {
938 return ((fsp->access_mask == DELETE_ACCESS) &&
939 (fsp->oplock_type == NO_OPLOCK));
940 }
941
942 /*
943 * Send a break message to the oplock holder and delay the open for
944 * our client.
945 */
946
947 static NTSTATUS send_break_message(files_struct *fsp,
948 struct share_mode_entry *exclusive,
949 uint64_t mid,
950 int oplock_request)
951 {
952 NTSTATUS status;
953 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
954
955 DEBUG(10, ("Sending break request to PID %s\n",
956 procid_str_static(&exclusive->pid)));
957 exclusive->op_mid = mid;
958
959 /* Create the message. */
960 share_mode_entry_to_message(msg, exclusive);
961
962 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
963 don't want this set in the share mode struct pointed to by lck. */
964
965 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
966 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
967 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
968 }
969
970 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
971 MSG_SMB_BREAK_REQUEST,
972 (uint8 *)msg,
973 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
974 if (!NT_STATUS_IS_OK(status)) {
975 DEBUG(3, ("Could not send oplock break message: %s\n",
976 nt_errstr(status)));
977 }
978
979 return status;
980 }
981
982 /*
983 * Return share_mode_entry pointers for :
984 * 1). Batch oplock entry.
985 * 2). Batch or exclusive oplock entry (may be identical to #1).
986 * bool have_level2_oplock
987 * bool have_no_oplock.
988 * Do internal consistency checks on the share mode for a file.
989 */
990
991 static void find_oplock_types(files_struct *fsp,
992 int oplock_request,
993 struct share_mode_lock *lck,
994 struct share_mode_entry **pp_batch,
995 struct share_mode_entry **pp_ex_or_batch,
996 bool *got_level2,
997 bool *got_no_oplock)
998 {
999 int i;
1000
1001 *pp_batch = NULL;
1002 *pp_ex_or_batch = NULL;
1003 *got_level2 = false;
1004 *got_no_oplock = false;
1005
1006 /* Ignore stat or internal opens, as is done in
1007 delay_for_batch_oplocks() and
1008 delay_for_exclusive_oplocks().
1009 */
1010 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1011 return;
1012 }
1013
1014 for (i=0; i<lck->num_share_modes; i++) {
1015 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1016 continue;
1017 }
1018
1019 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1020 is_stat_open(lck->share_modes[i].access_mask)) {
1021 /* We ignore stat opens in the table - they
1022 always have NO_OPLOCK and never get or
1023 cause breaks. JRA. */
1024 continue;
1025 }
1026
1027 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1028 /* batch - can only be one. */
1029 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1030 smb_panic("Bad batch oplock entry.");
1031 }
1032 *pp_batch = &lck->share_modes[i];
1033 }
1034
1035 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1036 /* Exclusive or batch - can only be one. */
1037 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1038 smb_panic("Bad exclusive or batch oplock entry.");
1039 }
1040 *pp_ex_or_batch = &lck->share_modes[i];
1041 }
1042
1043 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1044 if (*pp_batch || *pp_ex_or_batch) {
1045 smb_panic("Bad levelII oplock entry.");
1046 }
1047 *got_level2 = true;
1048 }
1049
1050 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1051 if (*pp_batch || *pp_ex_or_batch) {
1052 smb_panic("Bad no oplock entry.");
1053 }
1054 *got_no_oplock = true;
1055 }
1056 }
1057 }
1058
1059 static bool delay_for_batch_oplocks(files_struct *fsp,
1060 uint64_t mid,
1061 int oplock_request,
1062 struct share_mode_entry *batch_entry)
1063 {
1064 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1065 return false;
1066 }
1067
1068 if (batch_entry != NULL) {
1069 /* Found a batch oplock */
1070 send_break_message(fsp, batch_entry, mid, oplock_request);
1071 return true;
1072 }
1073 return false;
1074 }
1075
1076 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1077 uint64_t mid,
1078 int oplock_request,
1079 struct share_mode_entry *ex_entry)
1080 {
1081 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1082 return false;
1083 }
1084
1085 if (ex_entry != NULL) {
1086 /* Found an exclusive or batch oplock */
1087 bool delay_it = is_delete_request(fsp) ?
1088 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1089 if (delay_it) {
1090 send_break_message(fsp, ex_entry, mid, oplock_request);
1091 return true;
1092 }
1093 }
1094 return false;
1095 }
1096
1097 static void grant_fsp_oplock_type(files_struct *fsp,
1098 const struct byte_range_lock *br_lck,
1099 int oplock_request,
1100 bool got_level2_oplock,
1101 bool got_a_none_oplock)
1102 {
1103 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1104 lp_level2_oplocks(SNUM(fsp->conn));
1105
1106 /* Start by granting what the client asked for,
1107 but ensure no SAMBA_PRIVATE bits can be set. */
1108 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1109
1110 if (oplock_request & INTERNAL_OPEN_ONLY) {
1111 /* No oplocks on internal open. */
1112 fsp->oplock_type = NO_OPLOCK;
1113 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1114 fsp->oplock_type, fsp_str_dbg(fsp)));
1115 return;
1116 } else if (br_lck && br_lck->num_locks > 0) {
1117 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1118 fsp_str_dbg(fsp)));
1119 fsp->oplock_type = NO_OPLOCK;
1120 }
1121
1122 if (is_stat_open(fsp->access_mask)) {
1123 /* Leave the value already set. */
1124 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1125 fsp->oplock_type, fsp_str_dbg(fsp)));
1126 return;
1127 }
1128
1129 /*
1130 * Match what was requested (fsp->oplock_type) with
1131 * what was found in the existing share modes.
1132 */
1133
1134 if (got_a_none_oplock) {
1135 fsp->oplock_type = NO_OPLOCK;
1136 } else if (got_level2_oplock) {
1137 if (fsp->oplock_type == NO_OPLOCK ||
1138 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1139 /* Store a level2 oplock, but don't tell the client */
1140 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1141 } else {
1142 fsp->oplock_type = LEVEL_II_OPLOCK;
1143 }
1144 } else {
1145 /* All share_mode_entries are placeholders or deferred.
1146 * Silently upgrade to fake levelII if the client didn't
1147 * ask for an oplock. */
1148 if (fsp->oplock_type == NO_OPLOCK) {
1149 /* Store a level2 oplock, but don't tell the client */
1150 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1151 }
1152 }
1153
1154 /*
1155 * Don't grant level2 to clients that don't want them
1156 * or if we've turned them off.
1157 */
1158 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1159 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1160 }
1161
1162 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1163 fsp->oplock_type, fsp_str_dbg(fsp)));
1164 }
1165
1166 bool request_timed_out(struct timeval request_time,
1167 struct timeval timeout)
1168 {
1169 struct timeval now, end_time;
1170 GetTimeOfDay(&now);
1171 end_time = timeval_sum(&request_time, &timeout);
1172 return (timeval_compare(&end_time, &now) < 0);
1173 }
1174
1175 /****************************************************************************
1176 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1177 ****************************************************************************/
1178
1179 static void defer_open(struct share_mode_lock *lck,
1180 struct timeval request_time,
1181 struct timeval timeout,
1182 struct smb_request *req,
1183 struct deferred_open_record *state)
1184 {
1185 int i;
1186
1187 /* Paranoia check */
1188
1189 for (i=0; i<lck->num_share_modes; i++) {
1190 struct share_mode_entry *e = &lck->share_modes[i];
1191
1192 if (!is_deferred_open_entry(e)) {
1193 continue;
1194 }
1195
1196 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1197 DEBUG(0, ("Trying to defer an already deferred "
1198 "request: mid=%llu, exiting\n",
1199 (unsigned long long)req->mid));
1200 exit_server("attempt to defer a deferred request");
1201 }
1202 }
1203
1204 /* End paranoia check */
1205
1206 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1207 "open entry for mid %llu\n",
1208 (unsigned int)request_time.tv_sec,
1209 (unsigned int)request_time.tv_usec,
1210 (unsigned long long)req->mid));
1211
1212 if (!push_deferred_open_message_smb(req, request_time, timeout,
1213 state->id, (char *)state, sizeof(*state))) {
1214 exit_server("push_deferred_open_message_smb failed");
1215 }
1216 add_deferred_open(lck, req->mid, request_time,
1217 sconn_server_id(req->sconn), state->id);
1218 }
1219
1220
1221 /****************************************************************************
1222 On overwrite open ensure that the attributes match.
1223 ****************************************************************************/
1224
1225 bool open_match_attributes(connection_struct *conn,
1226 uint32 old_dos_attr,
1227 uint32 new_dos_attr,
1228 mode_t existing_unx_mode,
1229 mode_t new_unx_mode,
1230 mode_t *returned_unx_mode)
1231 {
1232 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1233
1234 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1235 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1236
1237 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1238 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1239 *returned_unx_mode = new_unx_mode;
1240 } else {
1241 *returned_unx_mode = (mode_t)0;
1242 }
1243
1244 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1245 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1246 "returned_unx_mode = 0%o\n",
1247 (unsigned int)old_dos_attr,
1248 (unsigned int)existing_unx_mode,
1249 (unsigned int)new_dos_attr,
1250 (unsigned int)*returned_unx_mode ));
1251
1252 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1253 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1254 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1255 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1256 return False;
1257 }
1258 }
1259 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1260 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1261 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1262 return False;
1263 }
1264 }
1265 return True;
1266 }
1267
1268 /****************************************************************************
1269 Special FCB or DOS processing in the case of a sharing violation.
1270 Try and find a duplicated file handle.
1271 ****************************************************************************/
1272
1273 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1274 connection_struct *conn,
1275 files_struct *fsp_to_dup_into,
1276 const struct smb_filename *smb_fname,
1277 struct file_id id,
1278 uint16 file_pid,
1279 uint16 vuid,
1280 uint32 access_mask,
1281 uint32 share_access,
1282 uint32 create_options)
1283 {
1284 files_struct *fsp;
1285
1286 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1287 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1288
1289 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1290 fsp = file_find_di_next(fsp)) {
1291
1292 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1293 "vuid = %u, file_pid = %u, private_options = 0x%x "
1294 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1295 fsp->fh->fd, (unsigned int)fsp->vuid,
1296 (unsigned int)fsp->file_pid,
1297 (unsigned int)fsp->fh->private_options,
1298 (unsigned int)fsp->access_mask ));
1299
1300 if (fsp->fh->fd != -1 &&
1301 fsp->vuid == vuid &&
1302 fsp->file_pid == file_pid &&
1303 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1304 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1305 (fsp->access_mask & FILE_WRITE_DATA) &&
1306 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1307 strequal(fsp->fsp_name->stream_name,
1308 smb_fname->stream_name)) {
1309 DEBUG(10,("fcb_or_dos_open: file match\n"));
1310 break;
1311 }
1312 }
1313
1314 if (!fsp) {
1315 return NT_STATUS_NOT_FOUND;
1316 }
1317
1318 /* quite an insane set of semantics ... */
1319 if (is_executable(smb_fname->base_name) &&
1320 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1321 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1322 return NT_STATUS_INVALID_PARAMETER;
1323 }
1324
1325 /* We need to duplicate this fsp. */
1326 return dup_file_fsp(req, fsp, access_mask, share_access,
1327 create_options, fsp_to_dup_into);
1328 }
1329
1330 static void schedule_defer_open(struct share_mode_lock *lck,
1331 struct timeval request_time,
1332 struct smb_request *req)
1333 {
1334 struct deferred_open_record state;
1335
1336 /* This is a relative time, added to the absolute
1337 request_time value to get the absolute timeout time.
1338 Note that if this is the second or greater time we enter
1339 this codepath for this particular request mid then
1340 request_time is left as the absolute time of the *first*
1341 time this request mid was processed. This is what allows
1342 the request to eventually time out. */
1343
1344 struct timeval timeout;
1345
1346 /* Normally the smbd we asked should respond within
1347 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1348 * the client did, give twice the timeout as a safety
1349 * measure here in case the other smbd is stuck
1350 * somewhere else. */
1351
1352 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1353
1354 /* Nothing actually uses state.delayed_for_oplocks
1355 but it's handy to differentiate in debug messages
1356 between a 30 second delay due to oplock break, and
1357 a 1 second delay for share mode conflicts. */
1358
1359 state.delayed_for_oplocks = True;
1360 state.id = lck->id;
1361
1362 if (!request_timed_out(request_time, timeout)) {
1363 defer_open(lck, request_time, timeout, req, &state);
1364 }
1365 }
1366
1367 /****************************************************************************
1368 Work out what access_mask to use from what the client sent us.
1369 ****************************************************************************/
1370
1371 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1372 const struct smb_filename *smb_fname,
1373 bool file_existed,
1374 uint32_t access_mask,
1375 uint32_t *access_mask_out)
1376 {
1377 NTSTATUS status;
1378 uint32_t orig_access_mask = access_mask;
1379 uint32_t rejected_share_access;
1380
1381 /*
1382 * Convert GENERIC bits to specific bits.
1383 */
1384
1385 se_map_generic(&access_mask, &file_generic_mapping);
1386
1387 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1388 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1389 if (file_existed) {
1390
1391 struct security_descriptor *sd;
1392 uint32_t access_granted = 0;
1393
1394 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1395 (SECINFO_OWNER |
1396 SECINFO_GROUP |
1397 SECINFO_DACL),&sd);
1398
1399 if (!NT_STATUS_IS_OK(status)) {
1400 DEBUG(10,("smbd_calculate_access_mask: "
1401 "Could not get acl on file %s: %s\n",
1402 smb_fname_str_dbg(smb_fname),
1403 nt_errstr(status)));
1404 return NT_STATUS_ACCESS_DENIED;
1405 }
1406
1407 status = smb1_file_se_access_check(conn,
1408 sd,
1409 get_current_nttok(conn),
1410 access_mask,
1411 &access_granted);
1412
1413 TALLOC_FREE(sd);
1414
1415 if (!NT_STATUS_IS_OK(status)) {
1416 DEBUG(10, ("smbd_calculate_access_mask: "
1417 "Access denied on file %s: "
1418 "when calculating maximum access\n",
1419 smb_fname_str_dbg(smb_fname)));
1420 return NT_STATUS_ACCESS_DENIED;
1421 }
1422
1423 access_mask = access_granted;
1424 } else {
1425 access_mask = FILE_GENERIC_ALL;
1426 }
1427
1428 access_mask &= conn->share_access;
1429 }
1430
1431 rejected_share_access = access_mask & ~(conn->share_access);
1432
1433 if (rejected_share_access) {
1434 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1435 "file %s: rejected by share access mask[0x%08X] "
1436 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1437 smb_fname_str_dbg(smb_fname),
1438 conn->share_access,
1439 orig_access_mask, access_mask,
1440 rejected_share_access));
1441 return NT_STATUS_ACCESS_DENIED;
1442 }
1443
1444 *access_mask_out = access_mask;
1445 return NT_STATUS_OK;
1446 }
1447
1448 /****************************************************************************
1449 Remove the deferred open entry under lock.
1450 ****************************************************************************/
1451
1452 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1453 struct server_id pid)
1454 {
1455 struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1456 NULL, NULL, NULL);
1457 if (lck == NULL) {
1458 DEBUG(0, ("could not get share mode lock\n"));
1459 } else {
1460 del_deferred_open_entry(lck, mid, pid);
1461 TALLOC_FREE(lck);
1462 }
1463 }
1464
1465 /****************************************************************
1466 Ensure we get the brlock lock followed by the share mode lock
1467 in the correct order to prevent deadlocks if other smbd's are
1468 using the brlock database on this file simultaneously with this open
1469 (that code also gets the locks in brlock -> share mode lock order).
1470 ****************************************************************/
1471
1472 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1473 files_struct *fsp,
1474 const struct file_id id,
1475 const char *connectpath,
1476 const struct smb_filename *smb_fname,
1477 const struct timespec *p_old_write_time,
1478 struct share_mode_lock **p_lck,
1479 struct byte_range_lock **p_br_lck)
1480 {
1481 /* Ordering - we must get the br_lck for this
1482 file before the share mode. */
1483 if (lp_locking(fsp->conn->params)) {
1484 *p_br_lck = brl_get_locks_readonly(fsp);
1485 if (*p_br_lck == NULL) {
1486 DEBUG(0, ("Could not get br_lock\n"));
1487 return false;
1488 }
1489 /* Note - we don't need to free the returned
1490 br_lck explicitly as it was allocated on talloc_tos()
1491 and so will be autofreed (and release the lock)
1492 once the frame context disappears.
1493
1494 If it was set to fsp->brlock_rec then it was
1495 talloc_move'd to hang off the fsp pointer and
1496 in this case is guarenteed to not be holding the
1497 lock on the brlock database. */
1498 }
1499
1500 *p_lck = get_share_mode_lock(mem_ctx,
1501 id,
1502 connectpath,
1503 smb_fname,
1504 p_old_write_time);
1505
1506 if (*p_lck == NULL) {
1507 DEBUG(0, ("Could not get share mode lock\n"));
1508 TALLOC_FREE(*p_br_lck);
1509 return false;
1510 }
1511 return true;
1512 }
1513
1514 /****************************************************************************
1515 Open a file with a share mode. Passed in an already created files_struct *.
1516 ****************************************************************************/
1517
1518 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1519 struct smb_request *req,
1520 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1521 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1522 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1523 uint32 create_options, /* options such as delete on close. */
1524 uint32 new_dos_attributes, /* attributes used for new file. */
1525 int oplock_request, /* internal Samba oplock codes. */
1526 /* Information (FILE_EXISTS etc.) */
1527 uint32_t private_flags, /* Samba specific flags. */
1528 int *pinfo,
1529 files_struct *fsp)
1530 {
1531 struct smb_filename *smb_fname = fsp->fsp_name;
1532 int flags=0;
1533 int flags2=0;
1534 bool file_existed = VALID_STAT(smb_fname->st);
1535 bool def_acl = False;
1536 bool posix_open = False;
1537 bool new_file_created = False;
1538 bool clear_ads = false;
1539 struct file_id id;
1540 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1541 mode_t new_unx_mode = (mode_t)0;
1542 mode_t unx_mode = (mode_t)0;
1543 int info;
1544 uint32 existing_dos_attributes = 0;
1545 struct timeval request_time = timeval_zero();
1546 struct share_mode_lock *lck = NULL;
1547 uint32 open_access_mask = access_mask;
1548 NTSTATUS status;
1549 char *parent_dir;
1550
1551 ZERO_STRUCT(id);
1552
1553 if (conn->printer) {
1554 /*
1555 * Printers are handled completely differently.
1556 * Most of the passed parameters are ignored.
1557 */
1558
1559 if (pinfo) {
1560 *pinfo = FILE_WAS_CREATED;
1561 }
1562
1563 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1564 smb_fname_str_dbg(smb_fname)));
1565
1566 if (!req) {
1567 DEBUG(0,("open_file_ntcreate: printer open without "
1568 "an SMB request!\n"));
1569 return NT_STATUS_INTERNAL_ERROR;
1570 }
1571
1572 return print_spool_open(fsp, smb_fname->base_name,
1573 req->vuid);
1574 }
1575
1576 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1577 NULL)) {
1578 return NT_STATUS_NO_MEMORY;
1579 }
1580
1581 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1582 posix_open = True;
1583 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1584 new_dos_attributes = 0;
1585 } else {
1586 /* Windows allows a new file to be created and
1587 silently removes a FILE_ATTRIBUTE_DIRECTORY
1588 sent by the client. Do the same. */
1589
1590 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1591
1592 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1593 * created new. */
1594 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1595 smb_fname, parent_dir);
1596 }
1597
1598 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1599 "access_mask=0x%x share_access=0x%x "
1600 "create_disposition = 0x%x create_options=0x%x "
1601 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1602 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1603 access_mask, share_access, create_disposition,
1604 create_options, (unsigned int)unx_mode, oplock_request,
1605 (unsigned int)private_flags));
1606
1607 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1608 DEBUG(0, ("No smb request but not an internal only open!\n"));
1609 return NT_STATUS_INTERNAL_ERROR;
1610 }
1611
1612 /*
1613 * Only non-internal opens can be deferred at all
1614 */
1615
1616 if (req) {
1617 void *ptr;
1618 if (get_deferred_open_message_state(req,
1619 &request_time,
1620 &ptr)) {
1621
1622 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1623 /* Remember the absolute time of the original
1624 request with this mid. We'll use it later to
1625 see if this has timed out. */
1626
1627 /* Remove the deferred open entry under lock. */
1628 remove_deferred_open_entry(
1629 state->id, req->mid,
1630 sconn_server_id(req->sconn));
1631
1632 /* Ensure we don't reprocess this message. */
1633 remove_deferred_open_message_smb(req->mid);
1634 }
1635 }
1636
1637 if (!posix_open) {
1638 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1639 if (file_existed) {
1640 existing_dos_attributes = dos_mode(conn, smb_fname);
1641 }
1642 }
1643
1644 /* ignore any oplock requests if oplocks are disabled */
1645 if (!lp_oplocks(SNUM(conn)) ||
1646 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1647 /* Mask off everything except the private Samba bits. */
1648 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1649 }
1650
1651 /* this is for OS/2 long file names - say we don't support them */
1652 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1653 /* OS/2 Workplace shell fix may be main code stream in a later
1654 * release. */
1655 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1656 "supported.\n"));
1657 if (use_nt_status()) {
1658 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1659 }
1660 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1661 }
1662
1663 switch( create_disposition ) {
1664 /*
1665 * Currently we're using FILE_SUPERSEDE as the same as
1666 * FILE_OVERWRITE_IF but they really are
1667 * different. FILE_SUPERSEDE deletes an existing file
1668 * (requiring delete access) then recreates it.
1669 */
1670 case FILE_SUPERSEDE:
1671 /* If file exists replace/overwrite. If file doesn't
1672 * exist create. */
1673 flags2 |= (O_CREAT | O_TRUNC);
1674 clear_ads = true;
1675 break;
1676
1677 case FILE_OVERWRITE_IF:
1678 /* If file exists replace/overwrite. If file doesn't
1679 * exist create. */
1680 flags2 |= (O_CREAT | O_TRUNC);
1681 clear_ads = true;
1682 break;
1683
1684 case FILE_OPEN:
1685 /* If file exists open. If file doesn't exist error. */
1686 if (!file_existed) {
1687 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1688 "requested for file %s and file "
1689 "doesn't exist.\n",
1690 smb_fname_str_dbg(smb_fname)));
1691 errno = ENOENT;
1692 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1693 }
1694 break;
1695
1696 case FILE_OVERWRITE:
1697 /* If file exists overwrite. If file doesn't exist
1698 * error. */
1699 if (!file_existed) {
1700 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1701 "requested for file %s and file "
1702 "doesn't exist.\n",
1703 smb_fname_str_dbg(smb_fname) ));
1704 errno = ENOENT;
1705 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1706 }
1707 flags2 |= O_TRUNC;
1708 clear_ads = true;
1709 break;
1710
1711 case FILE_CREATE:
1712 /* If file exists error. If file doesn't exist
1713 * create. */
1714 if (file_existed) {
1715 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1716 "requested for file %s and file "
1717 "already exists.\n",
1718 smb_fname_str_dbg(smb_fname)));
1719 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1720 errno = EISDIR;
1721 } else {
1722 errno = EEXIST;
1723 }
1724 return map_nt_error_from_unix(errno);
1725 }
1726 flags2 |= (O_CREAT|O_EXCL);
1727 break;
1728
1729 case FILE_OPEN_IF:
1730 /* If file exists open. If file doesn't exist
1731 * create. */
1732 flags2 |= O_CREAT;
1733 break;
1734
1735 default:
1736 return NT_STATUS_INVALID_PARAMETER;
1737 }
1738
1739 /* We only care about matching attributes on file exists and
1740 * overwrite. */
1741
1742 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1743 (create_disposition == FILE_OVERWRITE_IF))) {
1744 if (!open_match_attributes(conn, existing_dos_attributes,
1745 new_dos_attributes,
1746 smb_fname->st.st_ex_mode,
1747 unx_mode, &new_unx_mode)) {
1748 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1749 "for file %s (%x %x) (0%o, 0%o)\n",
1750 smb_fname_str_dbg(smb_fname),
1751 existing_dos_attributes,
1752 new_dos_attributes,
1753 (unsigned int)smb_fname->st.st_ex_mode,
1754 (unsigned int)unx_mode ));
1755 errno = EACCES;
1756 return NT_STATUS_ACCESS_DENIED;
1757 }
1758 }
1759
1760 status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1761 access_mask,
1762 &access_mask);
1763 if (!NT_STATUS_IS_OK(status)) {
1764 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1765 "on file %s returned %s\n",
1766 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1767 return status;
1768 }
1769
1770 open_access_mask = access_mask;
1771
1772 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1773 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1774 }
1775
1776 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1777 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1778 access_mask));
1779
1780 /*
1781 * Note that we ignore the append flag as append does not
1782 * mean the same thing under DOS and Unix.
1783 */
1784
1785 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1786 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1787 /* DENY_DOS opens are always underlying read-write on the
1788 file handle, no matter what the requested access mask
1789 says. */
1790 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1791 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1792 flags = O_RDWR;
1793 } else {
1794 flags = O_WRONLY;
1795 }
1796 } else {
1797 flags = O_RDONLY;
1798 }
1799
1800 /*
1801 * Currently we only look at FILE_WRITE_THROUGH for create options.
1802 */
1803
1804 #if defined(O_SYNC)
1805 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1806 flags2 |= O_SYNC;
1807 }
1808 #endif /* O_SYNC */
1809
1810 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1811 flags2 |= O_APPEND;
1812 }
1813
1814 if (!posix_open && !CAN_WRITE(conn)) {
1815 /*
1816 * We should really return a permission denied error if either
1817 * O_CREAT or O_TRUNC are set, but for compatibility with
1818 * older versions of Samba we just AND them out.
1819 */
1820 flags2 &= ~(O_CREAT|O_TRUNC);
1821 }
1822
1823 /*
1824 * Ensure we can't write on a read-only share or file.
1825 */
1826
1827 if (flags != O_RDONLY && file_existed &&
1828 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1829 DEBUG(5,("open_file_ntcreate: write access requested for "
1830 "file %s on read only %s\n",
1831 smb_fname_str_dbg(smb_fname),
1832 !CAN_WRITE(conn) ? "share" : "file" ));
1833 errno = EACCES;
1834 return NT_STATUS_ACCESS_DENIED;
1835 }
1836
1837 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1838 fsp->share_access = share_access;
1839 fsp->fh->private_options = private_flags;
1840 fsp->access_mask = open_access_mask; /* We change this to the
1841 * requested access_mask after
1842 * the open is done. */
1843 fsp->posix_open = posix_open;
1844
1845 /* Ensure no SAMBA_PRIVATE bits can be set. */
1846 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1847
1848 if (timeval_is_zero(&request_time)) {
1849 request_time = fsp->open_time;
1850 }
1851
1852 if (file_existed) {
1853 struct byte_range_lock *br_lck = NULL;
1854 struct share_mode_entry *batch_entry = NULL;
1855 struct share_mode_entry *exclusive_entry = NULL;
1856 bool got_level2_oplock = false;
1857 bool got_a_none_oplock = false;
1858
1859 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1860 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1861
1862 if (!acquire_ordered_locks(talloc_tos(),
1863 fsp,
1864 id,
1865 conn->connectpath,
1866 smb_fname,
1867 &old_write_time,
1868 &lck,
1869 &br_lck)) {
1870 return NT_STATUS_SHARING_VIOLATION;
1871 }
1872
1873 /* Get the types we need to examine. */
1874 find_oplock_types(fsp,
1875 oplock_request,
1876 lck,
1877 &batch_entry,
1878 &exclusive_entry,
1879 &got_level2_oplock,
1880 &got_a_none_oplock);
1881
1882 /* First pass - send break only on batch oplocks. */
1883 if ((req != NULL) &&
1884 delay_for_batch_oplocks(fsp,
1885 req->mid,
1886 oplock_request,
1887 batch_entry)) {
1888 schedule_defer_open(lck, request_time, req);
1889 TALLOC_FREE(lck);
1890 return NT_STATUS_SHARING_VIOLATION;
1891 }
1892
1893 /* Use the client requested access mask here, not the one we
1894 * open with. */
1895 status = open_mode_check(conn, lck, fsp->name_hash,
1896 access_mask, share_access,
1897 create_options, &file_existed);
1898
1899 if (NT_STATUS_IS_OK(status)) {
1900 /* We might be going to allow this open. Check oplock
1901 * status again. */
1902 /* Second pass - send break for both batch or
1903 * exclusive oplocks. */
1904 if ((req != NULL) &&
1905 delay_for_exclusive_oplocks(
1906 fsp,
1907 req->mid,
1908 oplock_request,
1909 exclusive_entry)) {
1910 schedule_defer_open(lck, request_time, req);
1911 TALLOC_FREE(lck);
1912 return NT_STATUS_SHARING_VIOLATION;
1913 }
1914 }
1915
1916 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1917 /* DELETE_PENDING is not deferred for a second */
1918 TALLOC_FREE(lck);
1919 return status;
1920 }
1921
1922 grant_fsp_oplock_type(fsp,
1923 br_lck,
1924 oplock_request,
1925 got_level2_oplock,
1926 got_a_none_oplock);
1927
1928 if (!NT_STATUS_IS_OK(status)) {
1929 uint32 can_access_mask;
1930 bool can_access = True;
1931
1932 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1933
1934 /* Check if this can be done with the deny_dos and fcb
1935 * calls. */
1936 if (private_flags &
1937 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1938 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1939 if (req == NULL) {
1940 DEBUG(0, ("DOS open without an SMB "
1941 "request!\n"));
1942 TALLOC_FREE(lck);
1943 return NT_STATUS_INTERNAL_ERROR;
1944 }
1945
1946 /* Use the client requested access mask here,
1947 * not the one we open with. */
1948 status = fcb_or_dos_open(req,
1949 conn,
1950 fsp,
1951 smb_fname,
1952 id,
1953 req->smbpid,
1954 req->vuid,
1955 access_mask,
1956 share_access,
1957 create_options);
1958
1959 if (NT_STATUS_IS_OK(status)) {
1960 TALLOC_FREE(lck);
1961 if (pinfo) {
1962 *pinfo = FILE_WAS_OPENED;
1963 }
1964 return NT_STATUS_OK;
1965 }
1966 }
1967
1968 /*
1969 * This next line is a subtlety we need for
1970 * MS-Access. If a file open will fail due to share
1971 * permissions and also for security (access) reasons,
1972 * we need to return the access failed error, not the
1973 * share error. We can't open the file due to kernel
1974 * oplock deadlock (it's possible we failed above on
1975 * the open_mode_check()) so use a userspace check.
1976 */
1977
1978 if (flags & O_RDWR) {
1979 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1980 } else if (flags & O_WRONLY) {
1981 can_access_mask = FILE_WRITE_DATA;
1982 } else {
1983 can_access_mask = FILE_READ_DATA;
1984 }
1985
1986 if (((can_access_mask & FILE_WRITE_DATA) &&
1987 !CAN_WRITE(conn)) ||
1988 !can_access_file_data(conn, smb_fname,
1989 can_access_mask)) {
1990 can_access = False;
1991 }
1992
1993 /*
1994 * If we're returning a share violation, ensure we
1995 * cope with the braindead 1 second delay.
1996 */
1997
1998 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1999 lp_defer_sharing_violations()) {
2000 struct timeval timeout;
2001 struct deferred_open_record state;
2002 int timeout_usecs;
2003
2004 /* this is a hack to speed up torture tests
2005 in 'make test' */
2006 timeout_usecs = lp_parm_int(SNUM(conn),
2007 "smbd","sharedelay",
2008 SHARING_VIOLATION_USEC_WAIT);
2009
2010 /* This is a relative time, added to the absolute
2011 request_time value to get the absolute timeout time.
2012 Note that if this is the second or greater time we enter
2013 this codepath for this particular request mid then
2014 request_time is left as the absolute time of the *first*
2015 time this request mid was processed. This is what allows
2016 the request to eventually time out. */
2017
2018 timeout = timeval_set(0, timeout_usecs);
2019
2020 /* Nothing actually uses state.delayed_for_oplocks
2021 but it's handy to differentiate in debug messages
2022 between a 30 second delay due to oplock break, and
2023 a 1 second delay for share mode conflicts. */
2024
2025 state.delayed_for_oplocks = False;
2026 state.id = id;
2027
2028 if ((req != NULL)
2029 && !request_timed_out(request_time,
2030 timeout)) {
2031 defer_open(lck, request_time, timeout,
2032 req, &state);
2033 }
2034 }
2035
2036 TALLOC_FREE(lck);
2037 if (can_access) {
2038 /*
2039 * We have detected a sharing violation here
2040 * so return the correct error code
2041 */
2042 status = NT_STATUS_SHARING_VIOLATION;
2043 } else {
2044 status = NT_STATUS_ACCESS_DENIED;
2045 }
2046 return status;
2047 }
2048
2049 /*
2050 * We exit this block with the share entry *locked*.....
2051 */
2052 }
2053
2054 SMB_ASSERT(!file_existed || (lck != NULL));
2055
2056 /*
2057 * Ensure we pay attention to default ACLs on directories if required.
2058 */
2059
2060 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2061 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2062 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2063 }
2064
2065 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2066 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2067 (unsigned int)flags, (unsigned int)flags2,
2068 (unsigned int)unx_mode, (unsigned int)access_mask,
2069 (unsigned int)open_access_mask));
2070
2071 /*
2072 * open_file strips any O_TRUNC flags itself.
2073 */
2074
2075 fsp_open = open_file(fsp, conn, req, parent_dir,
2076 flags|flags2, unx_mode, access_mask,
2077 open_access_mask);
2078
2079 if (!NT_STATUS_IS_OK(fsp_open)) {
2080 if (lck != NULL) {
2081 TALLOC_FREE(lck);
2082 }
2083 return fsp_open;
2084 }
2085
2086 if (!file_existed) {
2087 struct byte_range_lock *br_lck = NULL;
2088 struct share_mode_entry *batch_entry = NULL;
2089 struct share_mode_entry *exclusive_entry = NULL;
2090 bool got_level2_oplock = false;
2091 bool got_a_none_oplock = false;
2092 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2093 /*
2094 * Deal with the race condition where two smbd's detect the
2095 * file doesn't exist and do the create at the same time. One
2096 * of them will win and set a share mode, the other (ie. this
2097 * one) should check if the requested share mode for this
2098 * create is allowed.
2099 */
2100
2101 /*
2102 * Now the file exists and fsp is successfully opened,
2103 * fsp->dev and fsp->inode are valid and should replace the
2104 * dev=0,inode=0 from a non existent file. Spotted by
2105 * Nadav Danieli <nadavd@exanet.com>. JRA.
2106 */
2107
2108 id = fsp->file_id;
2109
2110 if (!acquire_ordered_locks(talloc_tos(),
2111 fsp,
2112 id,
2113 conn->connectpath,
2114 smb_fname,
2115 &old_write_time,
2116 &lck,
2117 &br_lck)) {
2118 return NT_STATUS_SHARING_VIOLATION;
2119 }
2120
2121 /* Get the types we need to examine. */
2122 find_oplock_types(fsp,
2123 oplock_request,
2124 lck,
2125 &batch_entry,
2126 &exclusive_entry,
2127 &got_level2_oplock,
2128 &got_a_none_oplock);
2129
2130 /* First pass - send break only on batch oplocks. */
2131 if ((req != NULL) &&
2132 delay_for_batch_oplocks(fsp,
2133 req->mid,
2134 oplock_request,
2135 batch_entry)) {
2136 schedule_defer_open(lck, request_time, req);
2137 TALLOC_FREE(lck);
2138 fd_close(fsp);
2139 return NT_STATUS_SHARING_VIOLATION;
2140 }
2141
2142 status = open_mode_check(conn, lck, fsp->name_hash,
2143 access_mask, share_access,
2144 create_options, &file_existed);
2145
2146 if (NT_STATUS_IS_OK(status)) {
2147 /* We might be going to allow this open. Check oplock
2148 * status again. */
2149 /* Second pass - send break for both batch or
2150 * exclusive oplocks. */
2151 if ((req != NULL) &&
2152 delay_for_exclusive_oplocks(
2153 fsp,
2154 req->mid,
2155 oplock_request,
2156 exclusive_entry)) {
2157 schedule_defer_open(lck, request_time, req);
2158 TALLOC_FREE(lck);
2159 fd_close(fsp);
2160 return NT_STATUS_SHARING_VIOLATION;
2161 }
2162 }
2163
2164 if (!NT_STATUS_IS_OK(status)) {
2165 struct deferred_open_record state;
2166
2167 fd_close(fsp);
2168
2169 state.delayed_for_oplocks = False;
2170 state.id = id;
2171
2172 /* Do it all over again immediately. In the second
2173 * round we will find that the file existed and handle
2174 * the DELETE_PENDING and FCB cases correctly. No need
2175 * to duplicate the code here. Essentially this is a
2176 * "goto top of this function", but don't tell
2177 * anybody... */
2178
2179 if (req != NULL) {
2180 defer_open(lck, request_time, timeval_zero(),
2181 req, &state);
2182 }
2183 TALLOC_FREE(lck);
2184 return status;
2185 }
2186
2187 grant_fsp_oplock_type(fsp,
2188 br_lck,
2189 oplock_request,
2190 got_level2_oplock,
2191 got_a_none_oplock);
2192
2193 /*
2194 * We exit this block with the share entry *locked*.....
2195 */
2196
2197 }
2198
2199 SMB_ASSERT(lck != NULL);
2200
2201 /* Delete streams if create_disposition requires it */
2202 if (file_existed && clear_ads &&
2203 !is_ntfs_stream_smb_fname(smb_fname)) {
2204 status = delete_all_streams(conn, smb_fname->base_name);
2205 if (!NT_STATUS_IS_OK(status)) {
2206 TALLOC_FREE(lck);
2207 fd_close(fsp);
2208 return status;
2209 }
2210 }
2211
2212 /* note that we ignore failure for the following. It is
2213 basically a hack for NFS, and NFS will never set one of
2214 these only read them. Nobody but Samba can ever set a deny
2215 mode and we have already checked our more authoritative
2216 locking database for permission to set this deny mode. If
2217 the kernel refuses the operations then the kernel is wrong.
2218 note that GPFS supports it as well - jmcd */
2219
2220 if (fsp->fh->fd != -1) {
2221 int ret_flock;
2222 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2223 if(ret_flock == -1 ){
2224
2225 TALLOC_FREE(lck);
2226 fd_close(fsp);
2227
2228 return NT_STATUS_SHARING_VIOLATION;
2229 }
2230 }
2231
2232 /*
2233 * At this point onwards, we can guarentee that the share entry
2234 * is locked, whether we created the file or not, and that the
2235 * deny mode is compatible with all current opens.
2236 */
2237
2238 /*
2239 * If requested, truncate the file.
2240 */
2241
2242 if (file_existed && (flags2&O_TRUNC)) {
2243 /*
2244 * We are modifing the file after open - update the stat
2245 * struct..
2246 */
2247 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2248 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2249 status = map_nt_error_from_unix(errno);
2250 TALLOC_FREE(lck);
2251 fd_close(fsp);
2252 return status;
2253 }
2254 }
2255
2256 /*
2257 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2258 * but we don't have to store this - just ignore it on access check.
2259 */
2260 if (conn->sconn->using_smb2) {
2261 /*
2262 * SMB2 doesn't return it (according to Microsoft tests).
2263 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2264 * File created with access = 0x7 (Read, Write, Delete)
2265 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2266 */
2267 fsp->access_mask = access_mask;
2268 } else {
2269 /* But SMB1 does. */
2270 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2271 }
2272
2273 if (file_existed) {
2274 /* stat opens on existing files don't get oplocks. */
2275 if (is_stat_open(open_access_mask)) {
2276 fsp->oplock_type = NO_OPLOCK;
2277 }
2278
2279 if (!(flags2 & O_TRUNC)) {
2280 info = FILE_WAS_OPENED;
2281 } else {
2282 info = FILE_WAS_OVERWRITTEN;
2283 }
2284 } else {
2285 info = FILE_WAS_CREATED;
2286 }
2287
2288 if (pinfo) {
2289 *pinfo = info;
2290 }
2291
2292 /*
2293 * Setup the oplock info in both the shared memory and
2294 * file structs.
2295 */
2296
2297 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2298 /*
2299 * Could not get the kernel oplock or there are byte-range
2300 * locks on the file.
2301 */
2302 fsp->oplock_type = NO_OPLOCK;
2303 }
2304
2305 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2306 new_file_created = True;
2307 }
2308
2309 set_share_mode(lck, fsp, get_current_uid(conn),
2310 req ? req->mid : 0,
2311 fsp->oplock_type);
2312
2313 /* Handle strange delete on close create semantics. */
2314 if (create_options & FILE_DELETE_ON_CLOSE) {
2315
2316 status = can_set_delete_on_close(fsp, new_dos_attributes);
2317
2318 if (!NT_STATUS_IS_OK(status)) {
2319 /* Remember to delete the mode we just added. */
2320 del_share_mode(lck, fsp);
2321 TALLOC_FREE(lck);
2322 fd_close(fsp);
2323 return status;
2324 }
2325 /* Note that here we set the *inital* delete on close flag,
2326 not the regular one. The magic gets handled in close. */
2327 fsp->initial_delete_on_close = True;
2328 }
2329
2330 if (new_file_created) {
2331 /* Files should be initially set as archive */
2332 if (lp_map_archive(SNUM(conn)) ||
2333 lp_store_dos_attributes(SNUM(conn))) {
2334 if (!posix_open) {
2335 if (file_set_dosmode(conn, smb_fname,
2336 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2337 parent_dir, true) == 0) {
2338 unx_mode = smb_fname->st.st_ex_mode;
2339 }
2340 }
2341 }
2342 }
2343
2344 /* Determine sparse flag. */
2345 if (posix_open) {
2346 /* POSIX opens are sparse by default. */
2347 fsp->is_sparse = true;
2348 } else {
2349 fsp->is_sparse = (file_existed &&
2350 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2351 }
2352
2353 /*
2354 * Take care of inherited ACLs on created files - if default ACL not
2355 * selected.
2356 */
2357
2358 if (!posix_open && !file_existed && !def_acl) {
2359
2360 int saved_errno = errno; /* We might get ENOSYS in the next
2361 * call.. */
2362
2363 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2364 errno == ENOSYS) {
2365 errno = saved_errno; /* Ignore ENOSYS */
2366 }
2367
2368 } else if (new_unx_mode) {
2369
2370 int ret = -1;
2371
2372 /* Attributes need changing. File already existed. */
2373
2374 {
2375 int saved_errno = errno; /* We might get ENOSYS in the
2376 * next call.. */
2377 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2378
2379 if (ret == -1 && errno == ENOSYS) {
2380 errno = saved_errno; /* Ignore ENOSYS */
2381 } else {
2382 DEBUG(5, ("open_file_ntcreate: reset "
2383 "attributes of file %s to 0%o\n",
2384 smb_fname_str_dbg(smb_fname),
2385 (unsigned int)new_unx_mode));
2386 ret = 0; /* Don't do the fchmod below. */
2387 }
2388 }
2389
2390 if ((ret == -1) &&
2391 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2392 DEBUG(5, ("open_file_ntcreate: failed to reset "
2393 "attributes of file %s to 0%o\n",
2394 smb_fname_str_dbg(smb_fname),
2395 (unsigned int)new_unx_mode));
2396 }
2397
2398 /* If this is a successful open, we must remove any deferred open
2399 * records. */
2400 if (req != NULL) {
2401 del_deferred_open_entry(lck, req->mid,
2402 sconn_server_id(req->sconn));
2403 }
2404 TALLOC_FREE(lck);
2405
2406 return NT_STATUS_OK;
2407 }
2408
2409
2410 /****************************************************************************
2411 Open a file for for write to ensure that we can fchmod it.
2412 ****************************************************************************/
2413
2414 NTSTATUS open_file_fchmod(connection_struct *conn,
2415 struct smb_filename *smb_fname,
2416 files_struct **result)
2417 {
2418 if (!VALID_STAT(smb_fname->st)) {
2419 return NT_STATUS_INVALID_PARAMETER;
2420 }
2421
2422 return SMB_VFS_CREATE_FILE(
2423 conn, /* conn */
2424 NULL, /* req */
2425 0, /* root_dir_fid */
2426 smb_fname, /* fname */
2427 FILE_WRITE_DATA, /* access_mask */
2428 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2429 FILE_SHARE_DELETE),
2430 FILE_OPEN, /* create_disposition*/
2431 0, /* create_options */
2432 0, /* file_attributes */
2433 INTERNAL_OPEN_ONLY, /* oplock_request */
2434 0, /* allocation_size */
2435 0, /* private_flags */
2436 NULL, /* sd */
2437 NULL, /* ea_list */
2438 result, /* result */
2439 NULL); /* pinfo */
2440 }
2441
2442 static NTSTATUS mkdir_internal(connection_struct *conn,
2443 struct smb_filename *smb_dname,
2444 uint32 file_attributes)
2445 {
2446 mode_t mode;
2447 char *parent_dir;
2448 NTSTATUS status;
2449 bool posix_open = false;
2450 bool need_re_stat = false;
2451
2452 if(!CAN_WRITE(conn)) {
2453 DEBUG(5,("mkdir_internal: failing create on read-only share "
2454 "%s\n", lp_servicename(SNUM(conn))));
2455 return NT_STATUS_ACCESS_DENIED;
2456 }
2457
2458 status = check_name(conn, smb_dname->base_name);
2459 if (!NT_STATUS_IS_OK(status)) {
2460 return status;
2461 }
2462
2463 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2464 NULL)) {
2465 return NT_STATUS_NO_MEMORY;
2466 }
2467
2468 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2469 posix_open = true;
2470 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2471 } else {
2472 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2473 }
2474
2475 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2476 return map_nt_error_from_unix(errno);
2477 }
2478
2479 /* Ensure we're checking for a symlink here.... */
2480 /* We don't want to get caught by a symlink racer. */
2481
2482 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2483 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2484 smb_fname_str_dbg(smb_dname), strerror(errno)));
2485 return map_nt_error_from_unix(errno);
2486 }
2487
2488 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2489 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2490 smb_fname_str_dbg(smb_dname)));
2491 return NT_STATUS_ACCESS_DENIED;
2492 }
2493
2494 if (lp_store_dos_attributes(SNUM(conn))) {
2495 if (!posix_open) {
2496 file_set_dosmode(conn, smb_dname,
2497 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2498 parent_dir, true);
2499 }
2500 }
2501
2502 if (lp_inherit_perms(SNUM(conn))) {
2503 inherit_access_posix_acl(conn, parent_dir,
2504 smb_dname->base_name, mode);
2505 need_re_stat = true;
2506 }
2507
2508 if (!posix_open) {
2509 /*
2510 * Check if high bits should have been set,
2511 * then (if bits are missing): add them.
2512 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2513 * dir.
2514 */
2515 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2516 (mode & ~smb_dname->st.st_ex_mode)) {
2517 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2518 (smb_dname->st.st_ex_mode |
2519 (mode & ~smb_dname->st.st_ex_mode)));
2520 need_re_stat = true;
2521 }
2522 }
2523
2524 /* Change the owner if required. */
2525 if (lp_inherit_owner(SNUM(conn))) {
2526 change_dir_owner_to_parent(conn, parent_dir,
2527 smb_dname->base_name,
2528 &smb_dname->st);
2529 need_re_stat = true;
2530 }
2531
2532 if (need_re_stat) {
2533 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2534 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2535 smb_fname_str_dbg(smb_dname), strerror(errno)));
2536 return map_nt_error_from_unix(errno);
2537 }
2538 }
2539
2540 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2541 smb_dname->base_name);
2542
2543 return NT_STATUS_OK;
2544 }
2545
2546 /****************************************************************************
2547 Ensure we didn't get symlink raced on opening a directory.
2548 ****************************************************************************/
2549
2550 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2551 const SMB_STRUCT_STAT *sbuf2)
2552 {
2553 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2554 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2555 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2556 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2557 return false;
2558 }
2559 return true;
2560 }
2561
2562 /****************************************************************************
2563 Open a directory from an NT SMB call.
2564 ****************************************************************************/
2565
2566 static NTSTATUS open_directory(connection_struct *conn,
2567 struct smb_request *req,
2568 struct smb_filename *smb_dname,
2569 uint32 access_mask,
2570 uint32 share_access,
2571 uint32 create_disposition,
2572 uint32 create_options,
2573 uint32 file_attributes,
2574 int *pinfo,
2575 files_struct **result)
2576 {
2577 files_struct *fsp = NULL;
2578 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2579 struct share_mode_lock *lck = NULL;
2580 NTSTATUS status;
2581 struct timespec mtimespec;
2582 int info = 0;
2583
2584 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2585
2586 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2587 /* Ensure we have a directory attribute. */
2588 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2589 }
2590
2591 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2592 "share_access = 0x%x create_options = 0x%x, "
2593 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2594 smb_fname_str_dbg(smb_dname),
2595 (unsigned int)access_mask,
2596 (unsigned int)share_access,
2597 (unsigned int)create_options,
2598 (unsigned int)create_disposition,
2599 (unsigned int)file_attributes));
2600
2601 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2602 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2603 is_ntfs_stream_smb_fname(smb_dname)) {
2604 DEBUG(2, ("open_directory: %s is a stream name!\n",
2605 smb_fname_str_dbg(smb_dname)));
2606 return NT_STATUS_NOT_A_DIRECTORY;
2607 }
2608
2609 status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2610 access_mask, &access_mask);
2611 if (!NT_STATUS_IS_OK(status)) {
2612 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2613 "on file %s returned %s\n",
2614 smb_fname_str_dbg(smb_dname),
2615 nt_errstr(status)));
2616 return status;
2617 }
2618
2619 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2620 !security_token_has_privilege(get_current_nttok(conn),
2621 SEC_PRIV_SECURITY)) {
2622 DEBUG(10, ("open_directory: open on %s "
2623 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2624 smb_fname_str_dbg(smb_dname)));
2625 return NT_STATUS_PRIVILEGE_NOT_HELD;
2626 }
2627
2628 switch( create_disposition ) {
2629 case FILE_OPEN:
2630
2631 if (!dir_existed) {
2632 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2633 }
2634
2635 info = FILE_WAS_OPENED;
2636 break;
2637
2638 case FILE_CREATE:
2639
2640 /* If directory exists error. If directory doesn't
2641 * exist create. */
2642
2643 status = mkdir_internal(conn, smb_dname,
2644 file_attributes);
2645
2646 if (!NT_STATUS_IS_OK(status)) {
2647 DEBUG(2, ("open_directory: unable to create "
2648 "%s. Error was %s\n",
2649 smb_fname_str_dbg(smb_dname),
2650 nt_errstr(status)));
2651 return status;
2652 }
2653
2654 info = FILE_WAS_CREATED;
2655 break;
2656
2657 case FILE_OPEN_IF:
2658 /*
2659 * If directory exists open. If directory doesn't
2660 * exist create.
2661 */
2662
2663 status = mkdir_internal(conn, smb_dname,
2664 file_attributes);
2665
2666 if (NT_STATUS_IS_OK(status)) {
2667 info = FILE_WAS_CREATED;
2668 }
2669
2670 if (NT_STATUS_EQUAL(status,
2671 NT_STATUS_OBJECT_NAME_COLLISION)) {
2672 info = FILE_WAS_OPENED;
2673 status = NT_STATUS_OK;
2674 }
2675 break;
2676
2677 case FILE_SUPERSEDE:
2678 case FILE_OVERWRITE:
2679 case FILE_OVERWRITE_IF:
2680 default:
2681 DEBUG(5,("open_directory: invalid create_disposition "
2682 "0x%x for directory %s\n",
2683 (unsigned int)create_disposition,
2684 smb_fname_str_dbg(smb_dname)));
2685 return NT_STATUS_INVALID_PARAMETER;
2686 }
2687
2688 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2689 DEBUG(5,("open_directory: %s is not a directory !\n",
2690 smb_fname_str_dbg(smb_dname)));
2691 return NT_STATUS_NOT_A_DIRECTORY;
2692 }
2693
2694 if (info == FILE_WAS_OPENED) {
2695 uint32_t access_granted = 0;
2696 status = smbd_check_open_rights(conn, smb_dname, access_mask,
2697 &access_granted);
2698
2699 /* Were we trying to do a directory open
2700 * for delete and didn't get DELETE
2701 * access (only) ? Check if the
2702 * directory allows DELETE_CHILD.
2703 * See here:
2704 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
2705 * for details. */
2706
2707 if ((NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
2708 (access_mask & DELETE_ACCESS) &&
2709 (access_granted == DELETE_ACCESS) &&
2710 can_delete_file_in_directory(conn, smb_dname))) {
2711 DEBUG(10,("open_directory: overrode ACCESS_DENIED "
2712 "on directory %s\n",
2713 smb_fname_str_dbg(smb_dname)));
2714 status = NT_STATUS_OK;
2715 }
2716
2717 if (!NT_STATUS_IS_OK(status)) {
2718 DEBUG(10, ("open_directory: smbd_check_open_rights on "
2719 "file %s failed with %s\n",
2720 smb_fname_str_dbg(smb_dname),
2721 nt_errstr(status)));
2722 return status;
2723 }
2724 }
2725
2726 status = file_new(req, conn, &fsp);
2727 if(!NT_STATUS_IS_OK(status)) {
2728 return status;
2729 }
2730
2731 /*
2732 * Setup the files_struct for it.
2733 */
2734
2735 fsp->mode = smb_dname->st.st_ex_mode;
2736 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2737 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2738 fsp->file_pid = req ? req->smbpid : 0;
2739 fsp->can_lock = False;
2740 fsp->can_read = False;
2741 fsp->can_write = False;
2742
2743 fsp->share_access = share_access;
2744 fsp->fh->private_options = 0;
2745 fsp->print_file = NULL;
2746 fsp->modified = False;
2747 fsp->oplock_type = NO_OPLOCK;
2748 fsp->sent_oplock_break = NO_BREAK_SENT;
2749 fsp->is_directory = True;
2750 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2751 status = fsp_set_smb_fname(fsp, smb_dname);
2752 if (!NT_STATUS_IS_OK(status)) {
2753 file_free(req, fsp);
2754 return status;
2755 }
2756
2757 mtimespec = smb_dname->st.st_ex_mtime;
2758
2759 /* Temporary access mask used to open the directory fd. */
2760 fsp->access_mask = FILE_READ_DATA | FILE_READ_ATTRIBUTES;
2761 #ifdef O_DIRECTORY
2762 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2763 #else
2764 /* POSIX allows us to open a directory with O_RDONLY. */
2765 status = fd_open(conn, fsp, O_RDONLY, 0);
2766 #endif
2767 if (!NT_STATUS_IS_OK(status)) {
2768 DEBUG(5, ("open_directory: Could not open fd for "
2769 "%s (%s)\n",
2770 smb_fname_str_dbg(smb_dname),
2771 nt_errstr(status)));
2772 file_free(req, fsp);
2773 return status;
2774 }
2775
2776 /*
2777 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2778 * Set the real access mask for later access (possibly delete).
2779 */
2780 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2781
2782 status = vfs_stat_fsp(fsp);
2783 if (!NT_STATUS_IS_OK(status)) {
2784 fd_close(fsp);
2785 file_free(req, fsp);
2786 return status;
2787 }
2788
2789 /* Ensure there was no race condition. */
2790 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2791 DEBUG(5,("open_directory: stat struct differs for "
2792 "directory %s.\n",
2793 smb_fname_str_dbg(smb_dname)));
2794 fd_close(fsp);
2795 file_free(req, fsp);
2796 return NT_STATUS_ACCESS_DENIED;
2797 }
2798
2799 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2800 conn->connectpath, smb_dname, &mtimespec);
2801
2802 if (lck == NULL) {
2803 DEBUG(0, ("open_directory: Could not get share mode lock for "
2804 "%s\n", smb_fname_str_dbg(smb_dname)));
2805 fd_close(fsp);
2806 file_free(req, fsp);
2807 return NT_STATUS_SHARING_VIOLATION;
2808 }
2809
2810 status = open_mode_check(conn, lck, fsp->name_hash,
2811 access_mask, share_access,
2812 create_options, &dir_existed);
2813
2814 if (!NT_STATUS_IS_OK(status)) {
2815 TALLOC_FREE(lck);
2816 fd_close(fsp);
2817 file_free(req, fsp);
2818 return status;
2819 }
2820
2821 set_share_mode(lck, fsp, get_current_uid(conn),
2822 req ? req->mid : 0, NO_OPLOCK);
2823
2824 /* For directories the delete on close bit at open time seems
2825 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2826 if (create_options & FILE_DELETE_ON_CLOSE) {
2827 status = can_set_delete_on_close(fsp, 0);
2828 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2829 TALLOC_FREE(lck);
2830 fd_close(fsp);
2831 file_free(req, fsp);
2832 return status;
2833 }
2834
2835 if (NT_STATUS_IS_OK(status)) {
2836 /* Note that here we set the *inital* delete on close flag,
2837 not the regular one. The magic gets handled in close. */
2838 fsp->initial_delete_on_close = True;
2839 }
2840 }
2841
2842 TALLOC_FREE(lck);
2843
2844 if (pinfo) {
2845 *pinfo = info;
2846 }
2847
2848 *result = fsp;
2849 return NT_STATUS_OK;
2850 }
2851
2852 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2853 struct smb_filename *smb_dname)
2854 {
2855 NTSTATUS status;
2856 files_struct *fsp;
2857
2858 status = SMB_VFS_CREATE_FILE(
2859 conn, /* conn */
2860 req, /* req */
2861 0, /* root_dir_fid */
2862 smb_dname, /* fname */
2863 FILE_READ_ATTRIBUTES, /* access_mask */
2864 FILE_SHARE_NONE, /* share_access */
2865 FILE_CREATE, /* create_disposition*/
2866 FILE_DIRECTORY_FILE, /* create_options */
2867 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2868 0, /* oplock_request */
2869 0, /* allocation_size */
2870 0, /* private_flags */
2871 NULL, /* sd */
2872 NULL, /* ea_list */
2873 &fsp, /* result */
2874 NULL); /* pinfo */
2875
2876 if (NT_STATUS_IS_OK(status)) {
2877 close_file(req, fsp, NORMAL_CLOSE);
2878 }
2879
2880 return status;
2881 }
2882
2883 /****************************************************************************
2884 Receive notification that one of our open files has been renamed by another
2885 smbd process.
2886 ****************************************************************************/
2887
2888 void msg_file_was_renamed(struct messaging_context *msg,
2889 void *private_data,
2890 uint32_t msg_type,
2891 struct server_id server_id,
2892 DATA_BLOB *data)
2893 {
2894 struct smbd_server_connection *sconn;
2895 files_struct *fsp;
2896 char *frm = (char *)data->data;
2897 struct file_id id;
2898 const char *sharepath;
2899 const char *base_name;
2900 const char *stream_name;
2901 struct smb_filename *smb_fname = NULL;
2902 size_t sp_len, bn_len;
2903 NTSTATUS status;
2904
2905 sconn = msg_ctx_to_sconn(msg);
2906 if (sconn == NULL) {
2907 DEBUG(1, ("could not find sconn\n"));
2908 return;
2909 }
2910
2911 if (data->data == NULL
2912 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2913 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2914 (int)data->length));
2915 return;
2916 }
2917
2918 /* Unpack the message. */
2919 pull_file_id_24(frm, &id);
2920 sharepath = &frm[24];
2921 sp_len = strlen(sharepath);
2922 base_name = sharepath + sp_len + 1;
2923 bn_len = strlen(base_name);
2924 stream_name = sharepath + sp_len + 1 + bn_len + 1;
2925
2926 /* stream_name must always be NULL if there is no stream. */
2927 if (stream_name[0] == '\0') {
2928 stream_name = NULL;
2929 }
2930
2931 status = create_synthetic_smb_fname(talloc_tos(), base_name,
2932 stream_name, NULL, &smb_fname);
2933 if (!NT_STATUS_IS_OK(status)) {
2934 return;
2935 }
2936
2937 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2938 "file_id %s\n",
2939 sharepath, smb_fname_str_dbg(smb_fname),
2940 file_id_string_tos(&id)));
2941
2942 for(fsp = file_find_di_first(sconn, id); fsp;
2943 fsp = file_find_di_next(fsp)) {
2944 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2945
2946 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2947 fsp->fnum, fsp_str_dbg(fsp),
2948 smb_fname_str_dbg(smb_fname)));
2949 status = fsp_set_smb_fname(fsp, smb_fname);
2950 if (!NT_STATUS_IS_OK(status)) {
2951 goto out;
2952 }
2953 } else {
2954 /* TODO. JRA. */
2955 /* Now we have the complete path we can work out if this is
2956 actually within this share and adjust newname accordingly. */
2957 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2958 "not sharepath %s) "
2959 "fnum %d from %s -> %s\n",
2960 fsp->conn->connectpath,
2961 sharepath,
2962 fsp->fnum,
2963 fsp_str_dbg(fsp),
2964 smb_fname_str_dbg(smb_fname)));
2965 }
2966 }
2967 out:
2968 TALLOC_FREE(smb_fname);
2969 return;
2970 }
2971
2972 /*
2973 * If a main file is opened for delete, all streams need to be checked for
2974 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2975 * If that works, delete them all by setting the delete on close and close.
2976 */
2977
2978 NTSTATUS open_streams_for_delete(connection_struct *conn,
2979 const char *fname)
2980 {
2981 struct stream_struct *stream_info = NULL;
2982 files_struct **streams = NULL;
2983 int i;
2984 unsigned int num_streams = 0;
2985 TALLOC_CTX *frame = talloc_stackframe();
2986 NTSTATUS status;
2987
2988 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
2989 &num_streams, &stream_info);
2990
2991 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2992 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2993 DEBUG(10, ("no streams around\n"));
2994 TALLOC_FREE(frame);
2995 return NT_STATUS_OK;
2996 }
2997
2998 if (!NT_STATUS_IS_OK(status)) {
2999 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3000 nt_errstr(status)));
3001 goto fail;
3002 }
3003
3004 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3005 num_streams));
3006
3007 if (num_streams == 0) {
3008 TALLOC_FREE(frame);
3009 return NT_STATUS_OK;
3010 }
3011
3012 streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
3013 if (streams == NULL) {
3014 DEBUG(0, ("talloc failed\n"));
3015 status = NT_STATUS_NO_MEMORY;
3016 goto fail;
3017 }
3018
3019 for (i=0; i<num_streams; i++) {
3020 struct smb_filename *smb_fname = NULL;
3021
3022 if (strequal(stream_info[i].name, "::$DATA")) {
3023 streams[i] = NULL;
3024 continue;
3025 }
3026
3027 status = create_synthetic_smb_fname(talloc_tos(), fname,
3028 stream_info[i].name,
3029 NULL, &smb_fname);
3030 if (!NT_STATUS_IS_OK(status)) {
3031 goto fail;
3032 }
3033
3034 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3035 DEBUG(10, ("Unable to stat stream: %s\n",
3036 smb_fname_str_dbg(smb_fname)));
3037 }
3038
3039 status = SMB_VFS_CREATE_FILE(
3040 conn, /* conn */
3041 NULL, /* req */
3042 0, /* root_dir_fid */
3043 smb_fname, /* fname */
3044 DELETE_ACCESS, /* access_mask */
3045 (FILE_SHARE_READ | /* share_access */
3046 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3047 FILE_OPEN, /* create_disposition*/
3048 0, /* create_options */
3049 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3050 0, /* oplock_request */
3051 0, /* allocation_size */
3052 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3053 NULL, /* sd */
3054 NULL, /* ea_list */
3055 &streams[i], /* result */
3056 NULL); /* pinfo */
3057
3058 if (!NT_STATUS_IS_OK(status)) {
3059 DEBUG(10, ("Could not open stream %s: %s\n",
3060 smb_fname_str_dbg(smb_fname),
3061 nt_errstr(status)));
3062
3063 TALLOC_FREE(smb_fname);
3064 break;
3065 }
3066 TALLOC_FREE(smb_fname);
3067 }
3068
3069 /*
3070 * don't touch the variable "status" beyond this point :-)
3071 */
3072
3073 for (i -= 1 ; i >= 0; i--) {
3074 if (streams[i] == NULL) {
3075 continue;
3076 }
3077
3078 DEBUG(10, ("Closing stream # %d, %s\n", i,
3079 fsp_str_dbg(streams[i])));
3080 close_file(NULL, streams[i], NORMAL_CLOSE);
3081 }
3082
3083 fail:
3084 TALLOC_FREE(frame);
3085 return status;
3086 }
3087
3088 /*
3089 * Wrapper around open_file_ntcreate and open_directory
3090 */
3091
3092 static NTSTATUS create_file_unixpath(connection_struct *conn,
3093 struct smb_request *req,
3094 struct smb_filename *smb_fname,
3095 uint32_t access_mask,
3096 uint32_t share_access,
3097 uint32_t create_disposition,
3098 uint32_t create_options,
3099 uint32_t file_attributes,
3100 uint32_t oplock_request,
3101 uint64_t allocation_size,
3102 uint32_t private_flags,
3103 struct security_descriptor *sd,
3104 struct ea_list *ea_list,
3105
3106 files_struct **result,
3107 int *pinfo)
3108 {
3109 int info = FILE_WAS_OPENED;
3110 files_struct *base_fsp = NULL;
3111 files_struct *fsp = NULL;
3112 NTSTATUS status;
3113
3114 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3115 "file_attributes = 0x%x, share_access = 0x%x, "
3116 "create_disposition = 0x%x create_options = 0x%x "
3117 "oplock_request = 0x%x private_flags = 0x%x "
3118 "ea_list = 0x%p, sd = 0x%p, "
3119 "fname = %s\n",
3120 (unsigned int)access_mask,
3121 (unsigned int)file_attributes,
3122 (unsigned int)share_access,
3123 (unsigned int)create_disposition,
3124 (unsigned int)create_options,
3125 (unsigned int)oplock_request,
3126 (unsigned int)private_flags,
3127 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3128
3129 if (create_options & FILE_OPEN_BY_FILE_ID) {
3130 status = NT_STATUS_NOT_SUPPORTED;
3131 goto fail;
3132 }
3133
3134 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3135 status = NT_STATUS_INVALID_PARAMETER;
3136 goto fail;
3137 }
3138
3139 if (req == NULL) {
3140 oplock_request |= INTERNAL_OPEN_ONLY;
3141 }
3142
3143 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3144 && (access_mask & DELETE_ACCESS)
3145 && !is_ntfs_stream_smb_fname(smb_fname)) {
3146 /*
3147 * We can't open a file with DELETE access if any of the
3148 * streams is open without FILE_SHARE_DELETE
3149 */
3150 status = open_streams_for_delete(conn, smb_fname->base_name);
3151
3152 if (!NT_STATUS_IS_OK(status)) {
3153 goto fail;
3154 }
3155 }
3156
3157 /* This is the correct thing to do (check every time) but can_delete
3158 * is expensive (it may have to read the parent directory
3159 * permissions). So for now we're not doing it unless we have a strong
3160 * hint the client is really going to delete this file. If the client
3161 * is forcing FILE_CREATE let the filesystem take care of the
3162 * permissions. */
3163
3164 /* Setting FILE_SHARE_DELETE is the hint. */
3165
3166 if ((create_disposition != FILE_CREATE)
3167 && (access_mask & DELETE_ACCESS)
3168 && (!(can_delete_file_in_directory(conn, smb_fname) ||
3169 can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
3170 status = NT_STATUS_ACCESS_DENIED;
3171 DEBUG(10,("create_file_unixpath: open file %s "
3172 "for delete ACCESS_DENIED\n",
3173 smb_fname_str_dbg(smb_fname)));
3174 goto fail;
3175 }
3176
3177 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3178 !security_token_has_privilege(get_current_nttok(conn),
3179 SEC_PRIV_SECURITY)) {
3180 DEBUG(10, ("create_file_unixpath: open on %s "
3181 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3182 smb_fname_str_dbg(smb_fname)));
3183 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3184 goto fail;
3185 }
3186
3187 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3188 && is_ntfs_stream_smb_fname(smb_fname)
3189 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3190 uint32 base_create_disposition;
3191 struct smb_filename *smb_fname_base = NULL;
3192
3193 if (create_options & FILE_DIRECTORY_FILE) {
3194 status = NT_STATUS_NOT_A_DIRECTORY;
3195 goto fail;
3196 }
3197
3198 switch (create_disposition) {
3199 case FILE_OPEN:
3200 base_create_disposition = FILE_OPEN;
3201 break;
3202 default:
3203 base_create_disposition = FILE_OPEN_IF;
3204 break;
3205 }
3206
3207 /* Create an smb_filename with stream_name == NULL. */
3208 status = create_synthetic_smb_fname(talloc_tos(),
3209 smb_fname->base_name,
3210 NULL, NULL,
3211 &smb_fname_base);
3212 if (!NT_STATUS_IS_OK(status)) {
3213 goto fail;
3214 }
3215
3216 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3217 DEBUG(10, ("Unable to stat stream: %s\n",
3218 smb_fname_str_dbg(smb_fname_base)));
3219 }
3220
3221 /* Open the base file. */
3222 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3223 FILE_SHARE_READ
3224 | FILE_SHARE_WRITE
3225 | FILE_SHARE_DELETE,
3226 base_create_disposition,
3227 0, 0, 0, 0, 0, NULL, NULL,
3228 &base_fsp, NULL);
3229 TALLOC_FREE(smb_fname_base);
3230
3231 if (!NT_STATUS_IS_OK(status)) {
3232 DEBUG(10, ("create_file_unixpath for base %s failed: "
3233 "%s\n", smb_fname->base_name,
3234 nt_errstr(status)));
3235 goto fail;
3236 }
3237 /* we don't need to low level fd */
3238 fd_close(base_fsp);
3239 }
3240
3241 /*
3242 * If it's a request for a directory open, deal with it separately.
3243 */
3244
3245 if (create_options & FILE_DIRECTORY_FILE) {
3246
3247 if (create_options & FILE_NON_DIRECTORY_FILE) {
3248 status = NT_STATUS_INVALID_PARAMETER;
3249 goto fail;
3250 }
3251
3252 /* Can't open a temp directory. IFS kit test. */
3253 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3254 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3255 status = NT_STATUS_INVALID_PARAMETER;
3256 goto fail;
3257 }
3258
3259 /*
3260 * We will get a create directory here if the Win32
3261 * app specified a security descriptor in the
3262 * CreateDirectory() call.
3263 */
3264
3265 oplock_request = 0;
3266 status = open_directory(
3267 conn, req, smb_fname, access_mask, share_access,
3268 create_disposition, create_options, file_attributes,
3269 &info, &fsp);
3270 } else {
3271
3272 /*
3273 * Ordinary file case.
3274 */
3275
3276 status = file_new(req, conn, &fsp);
3277 if(!NT_STATUS_IS_OK(status)) {
3278 goto fail;
3279 }
3280
3281 status = fsp_set_smb_fname(fsp, smb_fname);
3282 if (!NT_STATUS_IS_OK(status)) {
3283 goto fail;
3284 }
3285
3286 /*
3287 * We're opening the stream element of a base_fsp
3288 * we already opened. Set up the base_fsp pointer.
3289 */
3290 if (base_fsp) {
3291 fsp->base_fsp = base_fsp;
3292 }
3293
3294 status = open_file_ntcreate(conn,
3295 req,
3296 access_mask,
3297 share_access,
3298 create_disposition,
3299 create_options,
3300 file_attributes,
3301 oplock_request,
3302 private_flags,
3303 &info,
3304 fsp);
3305
3306 if(!NT_STATUS_IS_OK(status)) {
3307 file_free(req, fsp);
3308 fsp = NULL;
3309 }
3310
3311 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3312
3313 /* A stream open never opens a directory */
3314
3315 if (base_fsp) {
3316 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3317 goto fail;
3318 }
3319
3320 /*
3321 * Fail the open if it was explicitly a non-directory
3322 * file.
3323 */
3324
3325 if (create_options & FILE_NON_DIRECTORY_FILE) {
3326 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3327 goto fail;
3328 }
3329
3330 oplock_request = 0;
3331 status = open_directory(
3332 conn, req, smb_fname, access_mask,
3333 share_access, create_disposition,
3334 create_options, file_attributes,
3335 &info, &fsp);
3336 }
3337 }
3338
3339 if (!NT_STATUS_IS_OK(status)) {
3340 goto fail;
3341 }
3342
3343 fsp->base_fsp = base_fsp;
3344
3345 /*
3346 * According to the MS documentation, the only time the security
3347 * descriptor is applied to the opened file is iff we *created* the
3348 * file; an existing file stays the same.
3349 *
3350 * Also, it seems (from observation) that you can open the file with
3351 * any access mask but you can still write the sd. We need to override
3352 * the granted access before we call set_sd
3353 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3354 */
3355
3356 if ((sd != NULL) && (info == FILE_WAS_CREATED)
3357 && lp_nt_acl_support(SNUM(conn))) {
3358
3359 uint32_t sec_info_sent;
3360 uint32_t saved_access_mask = fsp->access_mask;
3361
3362 sec_info_sent = get_sec_info(sd);
3363
3364 fsp->access_mask = FILE_GENERIC_ALL;
3365
3366 /* Convert all the generic bits. */
3367 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3368 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3369
3370 if (sec_info_sent & (SECINFO_OWNER|
3371 SECINFO_GROUP|
3372 SECINFO_DACL|
3373 SECINFO_SACL)) {
3374 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3375 }
3376
3377 fsp->access_mask = saved_access_mask;
3378
3379 if (!NT_STATUS_IS_OK(status)) {
3380 goto fail;
3381 }
3382 }
3383
3384 if ((ea_list != NULL) &&
3385 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3386 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3387 if (!NT_STATUS_IS_OK(status)) {
3388 goto fail;
3389 }
3390 }
3391
3392 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3393 status = NT_STATUS_ACCESS_DENIED;
3394 goto fail;
3395 }
3396
3397 /* Save the requested allocation size. */
3398 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3399 if (allocation_size
3400 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3401 fsp->initial_allocation_size = smb_roundup(
3402 fsp->conn, allocation_size);
3403 if (fsp->is_directory) {
3404 /* Can't set allocation size on a directory. */
3405 status = NT_STATUS_ACCESS_DENIED;
3406 goto fail;
3407 }
3408 if (vfs_allocate_file_space(
3409 fsp, fsp->initial_allocation_size) == -1) {
3410 status = NT_STATUS_DISK_FULL;
3411 goto fail;
3412 }
3413 } else {
3414 fsp->initial_allocation_size = smb_roundup(
3415 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3416 }
3417 }
3418
3419 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3420
3421 *result = fsp;
3422 if (pinfo != NULL) {
3423 *pinfo = info;
3424 }
3425
3426 smb_fname->st = fsp->fsp_name->st;
3427
3428 return NT_STATUS_OK;
3429
3430 fail:
3431 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3432
3433 if (fsp != NULL) {
3434 if (base_fsp && fsp->base_fsp == base_fsp) {
3435 /*
3436 * The close_file below will close
3437 * fsp->base_fsp.
3438 */
3439 base_fsp = NULL;
3440 }
3441 close_file(req, fsp, ERROR_CLOSE);
3442 fsp = NULL;
3443 }
3444 if (base_fsp != NULL) {
3445 close_file(req, base_fsp, ERROR_CLOSE);
3446 base_fsp = NULL;
3447 }
3448 return status;
3449 }
3450
3451 /*
3452 * Calculate the full path name given a relative fid.
3453 */
3454 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3455 struct smb_request *req,
3456 uint16_t root_dir_fid,
3457 const struct smb_filename *smb_fname,
3458 struct smb_filename **smb_fname_out)
3459 {
3460 files_struct *dir_fsp;
3461 char *parent_fname = NULL;
3462 char *new_base_name = NULL;
3463 NTSTATUS status;
3464
3465 if (root_dir_fid == 0 || !smb_fname) {
3466 status = NT_STATUS_INTERNAL_ERROR;
3467 goto out;
3468 }
3469
3470 dir_fsp = file_fsp(req, root_dir_fid);
3471
3472 if (dir_fsp == NULL) {
3473 status = NT_STATUS_INVALID_HANDLE;
3474 goto out;
3475 }
3476
3477 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3478 status = NT_STATUS_INVALID_HANDLE;
3479 goto out;
3480 }
3481
3482 if (!dir_fsp->is_directory) {
3483
3484 /*
3485 * Check to see if this is a mac fork of some kind.
3486 */
3487
3488 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3489 is_ntfs_stream_smb_fname(smb_fname)) {
3490 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3491 goto out;
3492 }
3493
3494 /*
3495 we need to handle the case when we get a
3496 relative open relative to a file and the
3497 pathname is blank - this is a reopen!
3498 (hint from demyn plantenberg)
3499 */
3500
3501 status = NT_STATUS_INVALID_HANDLE;
3502 goto out;
3503 }
3504
3505 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3506 /*
3507 * We're at the toplevel dir, the final file name
3508 * must not contain ./, as this is filtered out
3509 * normally by srvstr_get_path and unix_convert
3510 * explicitly rejects paths containing ./.
3511 */
3512 parent_fname = talloc_strdup(talloc_tos(), "");
3513 if (parent_fname == NULL) {
3514 status = NT_STATUS_NO_MEMORY;
3515 goto out;
3516 }
3517 } else {
3518 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3519
3520 /*
3521 * Copy in the base directory name.
3522 */
3523
3524 parent_fname = TALLOC_ARRAY(talloc_tos(), char,
3525 dir_name_len+2);
3526 if (parent_fname == NULL) {
3527 status = NT_STATUS_NO_MEMORY;
3528 goto out;
3529 }
3530 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3531 dir_name_len+1);
3532
3533 /*
3534 * Ensure it ends in a '/'.
3535 * We used TALLOC_SIZE +2 to add space for the '/'.
3536 */
3537
3538 if(dir_name_len
3539 && (parent_fname[dir_name_len-1] != '\\')
3540 && (parent_fname[dir_name_len-1] != '/')) {
3541 parent_fname[dir_name_len] = '/';
3542 parent_fname[dir_name_len+1] = '\0';
3543 }
3544 }
3545
3546 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3547 smb_fname->base_name);
3548 if (new_base_name == NULL) {
3549 status = NT_STATUS_NO_MEMORY;
3550 goto out;
3551 }
3552
3553 status = filename_convert(req,
3554 conn,
3555 req->flags2 & FLAGS2_DFS_PATHNAMES,
3556 new_base_name,
3557 0,
3558 NULL,
3559 smb_fname_out);
3560 if (!NT_STATUS_IS_OK(status)) {
3561 goto out;
3562 }
3563
3564 out:
3565 TALLOC_FREE(parent_fname);
3566 TALLOC_FREE(new_base_name);
3567 return status;
3568 }
3569
3570 NTSTATUS create_file_default(connection_struct *conn,
3571 struct smb_request *req,
3572 uint16_t root_dir_fid,
3573 struct smb_filename *smb_fname,
3574 uint32_t access_mask,
3575 uint32_t share_access,
3576 uint32_t create_disposition,
3577 uint32_t create_options,
3578 uint32_t file_attributes,
3579 uint32_t oplock_request,
3580 uint64_t allocation_size,
3581 uint32_t private_flags,
3582 struct security_descriptor *sd,
3583 struct ea_list *ea_list,
3584 files_struct **result,
3585 int *pinfo)
3586 {
3587 int info = FILE_WAS_OPENED;
3588 files_struct *fsp = NULL;
3589 NTSTATUS status;
3590 bool stream_name = false;
3591
3592 DEBUG(10,("create_file: access_mask = 0x%x "
3593 "file_attributes = 0x%x, share_access = 0x%x, "
3594 "create_disposition = 0x%x create_options = 0x%x "
3595 "oplock_request = 0x%x "
3596 "private_flags = 0x%x "
3597 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3598 "fname = %s\n",
3599 (unsigned int)access_mask,
3600 (unsigned int)file_attributes,
3601 (unsigned int)share_access,
3602 (unsigned int)create_disposition,
3603 (unsigned int)create_options,
3604 (unsigned int)oplock_request,
3605 (unsigned int)private_flags,
3606 (unsigned int)root_dir_fid,
3607 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3608
3609 /*
3610 * Calculate the filename from the root_dir_if if necessary.
3611 */
3612
3613 if (root_dir_fid != 0) {
3614 struct smb_filename *smb_fname_out = NULL;
3615 status = get_relative_fid_filename(conn, req, root_dir_fid,
3616 smb_fname, &smb_fname_out);
3617 if (!NT_STATUS_IS_OK(status)) {
3618 goto fail;
3619 }
3620 smb_fname = smb_fname_out;
3621 }
3622
3623 /*
3624 * Check to see if this is a mac fork of some kind.
3625 */
3626
3627 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3628 if (stream_name) {
3629 enum FAKE_FILE_TYPE fake_file_type;
3630
3631 fake_file_type = is_fake_file(smb_fname);
3632
3633 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3634
3635 /*
3636 * Here we go! support for changing the disk quotas
3637 * --metze
3638 *
3639 * We need to fake up to open this MAGIC QUOTA file
3640 * and return a valid FID.
3641 *
3642 * w2k close this file directly after openening xp
3643 * also tries a QUERY_FILE_INFO on the file and then
3644 * close it
3645 */
3646 status = open_fake_file(req, conn, req->vuid,
3647 fake_file_type, smb_fname,
3648 access_mask, &fsp);
3649 if (!NT_STATUS_IS_OK(status)) {
3650 goto fail;
3651 }
3652
3653 ZERO_STRUCT(smb_fname->st);
3654 goto done;
3655 }
3656
3657 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3658 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3659 goto fail;
3660 }
3661 }
3662
3663 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3664 int ret;
3665 smb_fname->stream_name = NULL;
3666 /* We have to handle this error here. */
3667 if (create_options & FILE_DIRECTORY_FILE) {
3668 status = NT_STATUS_NOT_A_DIRECTORY;
3669 goto fail;
3670 }
3671 if (lp_posix_pathnames()) {
3672 ret = SMB_VFS_LSTAT(conn, smb_fname);
3673 } else {
3674 ret = SMB_VFS_STAT(conn, smb_fname);
3675 }
3676
3677 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3678 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3679 goto fail;
3680 }
3681 }
3682
3683 status = create_file_unixpath(
3684 conn, req, smb_fname, access_mask, share_access,
3685 create_disposition, create_options, file_attributes,
3686 oplock_request, allocation_size, private_flags,
3687 sd, ea_list,
3688 &fsp, &info);
3689
3690 if (!NT_STATUS_IS_OK(status)) {
3691 goto fail;
3692 }
3693
3694 done:
3695 DEBUG(10, ("create_file: info=%d\n", info));
3696
3697 *result = fsp;
3698 if (pinfo != NULL) {
3699 *pinfo = info;
3700 }
3701 return NT_STATUS_OK;
3702
3703 fail:
3704 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3705
3706 if (fsp != NULL) {
3707 close_file(req, fsp, ERROR_CLOSE);
3708 fsp = NULL;
3709 }
3710 return status;
3711 }
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