source: trunk/server/source3/smbd/open.c@ 752

Last change on this file since 752 was 751, checked in by Silvan Scherrer, 13 years ago

Samba Server: updated trunk to 3.6.9
File size: 103.8 KB
Line 
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
33extern const struct generic_mapping file_generic_mapping;
34
35struct 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
44NTSTATUS 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
71NTSTATUS 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
151static 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
198NTSTATUS 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
225void 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
279NTSTATUS 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
397static 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
715static 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, \
761sa = 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, \
769sa = 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)
795static 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
861bool 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
876static 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/*
938 * Send a break message to the oplock holder and delay the open for
939 * our client.
940 */
941
942static NTSTATUS send_break_message(files_struct *fsp,
943 struct share_mode_entry *exclusive,
944 uint64_t mid,
945 int oplock_request)
946{
947 NTSTATUS status;
948 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
949
950 DEBUG(10, ("Sending break request to PID %s\n",
951 procid_str_static(&exclusive->pid)));
952 exclusive->op_mid = mid;
953
954 /* Create the message. */
955 share_mode_entry_to_message(msg, exclusive);
956
957 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
958 don't want this set in the share mode struct pointed to by lck. */
959
960 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
961 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
962 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
963 }
964
965 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
966 MSG_SMB_BREAK_REQUEST,
967 (uint8 *)msg,
968 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
969 if (!NT_STATUS_IS_OK(status)) {
970 DEBUG(3, ("Could not send oplock break message: %s\n",
971 nt_errstr(status)));
972 }
973
974 return status;
975}
976
977/*
978 * Return share_mode_entry pointers for :
979 * 1). Batch oplock entry.
980 * 2). Batch or exclusive oplock entry (may be identical to #1).
981 * bool have_level2_oplock
982 * bool have_no_oplock.
983 * Do internal consistency checks on the share mode for a file.
984 */
985
986static void find_oplock_types(files_struct *fsp,
987 int oplock_request,
988 struct share_mode_lock *lck,
989 struct share_mode_entry **pp_batch,
990 struct share_mode_entry **pp_ex_or_batch,
991 bool *got_level2,
992 bool *got_no_oplock)
993{
994 int i;
995
996 *pp_batch = NULL;
997 *pp_ex_or_batch = NULL;
998 *got_level2 = false;
999 *got_no_oplock = false;
1000
1001 /* Ignore stat or internal opens, as is done in
1002 delay_for_batch_oplocks() and
1003 delay_for_exclusive_oplocks().
1004 */
1005 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1006 return;
1007 }
1008
1009 for (i=0; i<lck->num_share_modes; i++) {
1010 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1011 continue;
1012 }
1013
1014 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1015 is_stat_open(lck->share_modes[i].access_mask)) {
1016 /* We ignore stat opens in the table - they
1017 always have NO_OPLOCK and never get or
1018 cause breaks. JRA. */
1019 continue;
1020 }
1021
1022 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1023 /* batch - can only be one. */
1024 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1025 smb_panic("Bad batch oplock entry.");
1026 }
1027 *pp_batch = &lck->share_modes[i];
1028 }
1029
1030 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1031 /* Exclusive or batch - can only be one. */
1032 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1033 smb_panic("Bad exclusive or batch oplock entry.");
1034 }
1035 *pp_ex_or_batch = &lck->share_modes[i];
1036 }
1037
1038 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1039 if (*pp_batch || *pp_ex_or_batch) {
1040 smb_panic("Bad levelII oplock entry.");
1041 }
1042 *got_level2 = true;
1043 }
1044
1045 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1046 if (*pp_batch || *pp_ex_or_batch) {
1047 smb_panic("Bad no oplock entry.");
1048 }
1049 *got_no_oplock = true;
1050 }
1051 }
1052}
1053
1054static bool delay_for_batch_oplocks(files_struct *fsp,
1055 uint64_t mid,
1056 int oplock_request,
1057 struct share_mode_entry *batch_entry)
1058{
1059 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1060 return false;
1061 }
1062
1063 if (batch_entry != NULL) {
1064 /* Found a batch oplock */
1065 send_break_message(fsp, batch_entry, mid, oplock_request);
1066 return true;
1067 }
1068 return false;
1069}
1070
1071static bool delay_for_exclusive_oplocks(files_struct *fsp,
1072 uint64_t mid,
1073 int oplock_request,
1074 struct share_mode_entry *ex_entry)
1075{
1076 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1077 return false;
1078 }
1079
1080 if (ex_entry != NULL) {
1081 send_break_message(fsp, ex_entry, mid, oplock_request);
1082 return true;
1083 }
1084 return false;
1085}
1086
1087static void grant_fsp_oplock_type(files_struct *fsp,
1088 const struct byte_range_lock *br_lck,
1089 int oplock_request,
1090 bool got_level2_oplock,
1091 bool got_a_none_oplock)
1092{
1093 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1094 lp_level2_oplocks(SNUM(fsp->conn));
1095
1096 /* Start by granting what the client asked for,
1097 but ensure no SAMBA_PRIVATE bits can be set. */
1098 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1099
1100 if (oplock_request & INTERNAL_OPEN_ONLY) {
1101 /* No oplocks on internal open. */
1102 fsp->oplock_type = NO_OPLOCK;
1103 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1104 fsp->oplock_type, fsp_str_dbg(fsp)));
1105 return;
1106 } else if (br_lck && br_lck->num_locks > 0) {
1107 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1108 fsp_str_dbg(fsp)));
1109 fsp->oplock_type = NO_OPLOCK;
1110 }
1111
1112 if (is_stat_open(fsp->access_mask)) {
1113 /* Leave the value already set. */
1114 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1115 fsp->oplock_type, fsp_str_dbg(fsp)));
1116 return;
1117 }
1118
1119 /*
1120 * Match what was requested (fsp->oplock_type) with
1121 * what was found in the existing share modes.
1122 */
1123
1124 if (got_a_none_oplock) {
1125 fsp->oplock_type = NO_OPLOCK;
1126 } else if (got_level2_oplock) {
1127 if (fsp->oplock_type == NO_OPLOCK ||
1128 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1129 /* Store a level2 oplock, but don't tell the client */
1130 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1131 } else {
1132 fsp->oplock_type = LEVEL_II_OPLOCK;
1133 }
1134 } else {
1135 /* All share_mode_entries are placeholders or deferred.
1136 * Silently upgrade to fake levelII if the client didn't
1137 * ask for an oplock. */
1138 if (fsp->oplock_type == NO_OPLOCK) {
1139 /* Store a level2 oplock, but don't tell the client */
1140 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1141 }
1142 }
1143
1144 /*
1145 * Don't grant level2 to clients that don't want them
1146 * or if we've turned them off.
1147 */
1148 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1149 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1150 }
1151
1152 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1153 fsp->oplock_type, fsp_str_dbg(fsp)));
1154}
1155
1156bool request_timed_out(struct timeval request_time,
1157 struct timeval timeout)
1158{
1159 struct timeval now, end_time;
1160 GetTimeOfDay(&now);
1161 end_time = timeval_sum(&request_time, &timeout);
1162 return (timeval_compare(&end_time, &now) < 0);
1163}
1164
1165/****************************************************************************
1166 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1167****************************************************************************/
1168
1169static void defer_open(struct share_mode_lock *lck,
1170 struct timeval request_time,
1171 struct timeval timeout,
1172 struct smb_request *req,
1173 struct deferred_open_record *state)
1174{
1175 int i;
1176
1177 /* Paranoia check */
1178
1179 for (i=0; i<lck->num_share_modes; i++) {
1180 struct share_mode_entry *e = &lck->share_modes[i];
1181
1182 if (!is_deferred_open_entry(e)) {
1183 continue;
1184 }
1185
1186 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1187 DEBUG(0, ("Trying to defer an already deferred "
1188 "request: mid=%llu, exiting\n",
1189 (unsigned long long)req->mid));
1190 exit_server("attempt to defer a deferred request");
1191 }
1192 }
1193
1194 /* End paranoia check */
1195
1196 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1197 "open entry for mid %llu\n",
1198 (unsigned int)request_time.tv_sec,
1199 (unsigned int)request_time.tv_usec,
1200 (unsigned long long)req->mid));
1201
1202 if (!push_deferred_open_message_smb(req, request_time, timeout,
1203 state->id, (char *)state, sizeof(*state))) {
1204 exit_server("push_deferred_open_message_smb failed");
1205 }
1206 add_deferred_open(lck, req->mid, request_time,
1207 sconn_server_id(req->sconn), state->id);
1208}
1209
1210
1211/****************************************************************************
1212 On overwrite open ensure that the attributes match.
1213****************************************************************************/
1214
1215bool open_match_attributes(connection_struct *conn,
1216 uint32 old_dos_attr,
1217 uint32 new_dos_attr,
1218 mode_t existing_unx_mode,
1219 mode_t new_unx_mode,
1220 mode_t *returned_unx_mode)
1221{
1222 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1223
1224 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1225 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1226
1227 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1228 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1229 *returned_unx_mode = new_unx_mode;
1230 } else {
1231 *returned_unx_mode = (mode_t)0;
1232 }
1233
1234 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1235 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1236 "returned_unx_mode = 0%o\n",
1237 (unsigned int)old_dos_attr,
1238 (unsigned int)existing_unx_mode,
1239 (unsigned int)new_dos_attr,
1240 (unsigned int)*returned_unx_mode ));
1241
1242 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1243 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1244 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1245 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1246 return False;
1247 }
1248 }
1249 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1250 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1251 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1252 return False;
1253 }
1254 }
1255 return True;
1256}
1257
1258/****************************************************************************
1259 Special FCB or DOS processing in the case of a sharing violation.
1260 Try and find a duplicated file handle.
1261****************************************************************************/
1262
1263NTSTATUS fcb_or_dos_open(struct smb_request *req,
1264 connection_struct *conn,
1265 files_struct *fsp_to_dup_into,
1266 const struct smb_filename *smb_fname,
1267 struct file_id id,
1268 uint16 file_pid,
1269 uint16 vuid,
1270 uint32 access_mask,
1271 uint32 share_access,
1272 uint32 create_options)
1273{
1274 files_struct *fsp;
1275
1276 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1277 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1278
1279 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1280 fsp = file_find_di_next(fsp)) {
1281
1282 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1283 "vuid = %u, file_pid = %u, private_options = 0x%x "
1284 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1285 fsp->fh->fd, (unsigned int)fsp->vuid,
1286 (unsigned int)fsp->file_pid,
1287 (unsigned int)fsp->fh->private_options,
1288 (unsigned int)fsp->access_mask ));
1289
1290 if (fsp->fh->fd != -1 &&
1291 fsp->vuid == vuid &&
1292 fsp->file_pid == file_pid &&
1293 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1294 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1295 (fsp->access_mask & FILE_WRITE_DATA) &&
1296 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1297 strequal(fsp->fsp_name->stream_name,
1298 smb_fname->stream_name)) {
1299 DEBUG(10,("fcb_or_dos_open: file match\n"));
1300 break;
1301 }
1302 }
1303
1304 if (!fsp) {
1305 return NT_STATUS_NOT_FOUND;
1306 }
1307
1308 /* quite an insane set of semantics ... */
1309 if (is_executable(smb_fname->base_name) &&
1310 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1311 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1312 return NT_STATUS_INVALID_PARAMETER;
1313 }
1314
1315 /* We need to duplicate this fsp. */
1316 return dup_file_fsp(req, fsp, access_mask, share_access,
1317 create_options, fsp_to_dup_into);
1318}
1319
1320static void schedule_defer_open(struct share_mode_lock *lck,
1321 struct timeval request_time,
1322 struct smb_request *req)
1323{
1324 struct deferred_open_record state;
1325
1326 /* This is a relative time, added to the absolute
1327 request_time value to get the absolute timeout time.
1328 Note that if this is the second or greater time we enter
1329 this codepath for this particular request mid then
1330 request_time is left as the absolute time of the *first*
1331 time this request mid was processed. This is what allows
1332 the request to eventually time out. */
1333
1334 struct timeval timeout;
1335
1336 /* Normally the smbd we asked should respond within
1337 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1338 * the client did, give twice the timeout as a safety
1339 * measure here in case the other smbd is stuck
1340 * somewhere else. */
1341
1342 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1343
1344 /* Nothing actually uses state.delayed_for_oplocks
1345 but it's handy to differentiate in debug messages
1346 between a 30 second delay due to oplock break, and
1347 a 1 second delay for share mode conflicts. */
1348
1349 state.delayed_for_oplocks = True;
1350 state.id = lck->id;
1351
1352 if (!request_timed_out(request_time, timeout)) {
1353 defer_open(lck, request_time, timeout, req, &state);
1354 }
1355}
1356
1357/****************************************************************************
1358 Work out what access_mask to use from what the client sent us.
1359****************************************************************************/
1360
1361NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1362 const struct smb_filename *smb_fname,
1363 bool file_existed,
1364 uint32_t access_mask,
1365 uint32_t *access_mask_out)
1366{
1367 NTSTATUS status;
1368 uint32_t orig_access_mask = access_mask;
1369 uint32_t rejected_share_access;
1370
1371 /*
1372 * Convert GENERIC bits to specific bits.
1373 */
1374
1375 se_map_generic(&access_mask, &file_generic_mapping);
1376
1377 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1378 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1379 if (file_existed) {
1380
1381 struct security_descriptor *sd;
1382 uint32_t access_granted = 0;
1383
1384 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1385 (SECINFO_OWNER |
1386 SECINFO_GROUP |
1387 SECINFO_DACL),&sd);
1388
1389 if (!NT_STATUS_IS_OK(status)) {
1390 DEBUG(10,("smbd_calculate_access_mask: "
1391 "Could not get acl on file %s: %s\n",
1392 smb_fname_str_dbg(smb_fname),
1393 nt_errstr(status)));
1394 return NT_STATUS_ACCESS_DENIED;
1395 }
1396
1397 status = smb1_file_se_access_check(conn,
1398 sd,
1399 get_current_nttok(conn),
1400 access_mask,
1401 &access_granted);
1402
1403 TALLOC_FREE(sd);
1404
1405 if (!NT_STATUS_IS_OK(status)) {
1406 DEBUG(10, ("smbd_calculate_access_mask: "
1407 "Access denied on file %s: "
1408 "when calculating maximum access\n",
1409 smb_fname_str_dbg(smb_fname)));
1410 return NT_STATUS_ACCESS_DENIED;
1411 }
1412
1413 if (!(access_granted & DELETE_ACCESS)) {
1414 if (can_delete_file_in_directory(conn, smb_fname)) {
1415 access_granted |= DELETE_ACCESS;
1416 }
1417 }
1418
1419 access_mask = access_granted;
1420 } else {
1421 access_mask = FILE_GENERIC_ALL;
1422 }
1423
1424 access_mask &= conn->share_access;
1425 }
1426
1427 rejected_share_access = access_mask & ~(conn->share_access);
1428
1429 if (rejected_share_access) {
1430 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1431 "file %s: rejected by share access mask[0x%08X] "
1432 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1433 smb_fname_str_dbg(smb_fname),
1434 conn->share_access,
1435 orig_access_mask, access_mask,
1436 rejected_share_access));
1437 return NT_STATUS_ACCESS_DENIED;
1438 }
1439
1440 *access_mask_out = access_mask;
1441 return NT_STATUS_OK;
1442}
1443
1444/****************************************************************************
1445 Remove the deferred open entry under lock.
1446****************************************************************************/
1447
1448void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1449 struct server_id pid)
1450{
1451 struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1452 NULL, NULL, NULL);
1453 if (lck == NULL) {
1454 DEBUG(0, ("could not get share mode lock\n"));
1455 } else {
1456 del_deferred_open_entry(lck, mid, pid);
1457 TALLOC_FREE(lck);
1458 }
1459}
1460
1461/****************************************************************
1462 Ensure we get the brlock lock followed by the share mode lock
1463 in the correct order to prevent deadlocks if other smbd's are
1464 using the brlock database on this file simultaneously with this open
1465 (that code also gets the locks in brlock -> share mode lock order).
1466****************************************************************/
1467
1468static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1469 files_struct *fsp,
1470 const struct file_id id,
1471 const char *connectpath,
1472 const struct smb_filename *smb_fname,
1473 const struct timespec *p_old_write_time,
1474 struct share_mode_lock **p_lck,
1475 struct byte_range_lock **p_br_lck)
1476{
1477 /* Ordering - we must get the br_lck for this
1478 file before the share mode. */
1479 if (lp_locking(fsp->conn->params)) {
1480 *p_br_lck = brl_get_locks_readonly(fsp);
1481 if (*p_br_lck == NULL) {
1482 DEBUG(0, ("Could not get br_lock\n"));
1483 return false;
1484 }
1485 /* Note - we don't need to free the returned
1486 br_lck explicitly as it was allocated on talloc_tos()
1487 and so will be autofreed (and release the lock)
1488 once the frame context disappears.
1489
1490 If it was set to fsp->brlock_rec then it was
1491 talloc_move'd to hang off the fsp pointer and
1492 in this case is guarenteed to not be holding the
1493 lock on the brlock database. */
1494 }
1495
1496 *p_lck = get_share_mode_lock(mem_ctx,
1497 id,
1498 connectpath,
1499 smb_fname,
1500 p_old_write_time);
1501
1502 if (*p_lck == NULL) {
1503 DEBUG(0, ("Could not get share mode lock\n"));
1504 TALLOC_FREE(*p_br_lck);
1505 return false;
1506 }
1507 return true;
1508}
1509
1510/****************************************************************************
1511 Open a file with a share mode. Passed in an already created files_struct *.
1512****************************************************************************/
1513
1514static NTSTATUS open_file_ntcreate(connection_struct *conn,
1515 struct smb_request *req,
1516 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1517 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1518 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1519 uint32 create_options, /* options such as delete on close. */
1520 uint32 new_dos_attributes, /* attributes used for new file. */
1521 int oplock_request, /* internal Samba oplock codes. */
1522 /* Information (FILE_EXISTS etc.) */
1523 uint32_t private_flags, /* Samba specific flags. */
1524 int *pinfo,
1525 files_struct *fsp)
1526{
1527 struct smb_filename *smb_fname = fsp->fsp_name;
1528 int flags=0;
1529 int flags2=0;
1530 bool file_existed = VALID_STAT(smb_fname->st);
1531 bool def_acl = False;
1532 bool posix_open = False;
1533 bool new_file_created = False;
1534 bool clear_ads = false;
1535 struct file_id id;
1536 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1537 mode_t new_unx_mode = (mode_t)0;
1538 mode_t unx_mode = (mode_t)0;
1539 int info;
1540 uint32 existing_dos_attributes = 0;
1541 struct timeval request_time = timeval_zero();
1542 struct share_mode_lock *lck = NULL;
1543 uint32 open_access_mask = access_mask;
1544 NTSTATUS status;
1545 char *parent_dir;
1546
1547 ZERO_STRUCT(id);
1548
1549 if (conn->printer) {
1550 /*
1551 * Printers are handled completely differently.
1552 * Most of the passed parameters are ignored.
1553 */
1554
1555 if (pinfo) {
1556 *pinfo = FILE_WAS_CREATED;
1557 }
1558
1559 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1560 smb_fname_str_dbg(smb_fname)));
1561
1562 if (!req) {
1563 DEBUG(0,("open_file_ntcreate: printer open without "
1564 "an SMB request!\n"));
1565 return NT_STATUS_INTERNAL_ERROR;
1566 }
1567
1568 return print_spool_open(fsp, smb_fname->base_name,
1569 req->vuid);
1570 }
1571
1572 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1573 NULL)) {
1574 return NT_STATUS_NO_MEMORY;
1575 }
1576
1577 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1578 posix_open = True;
1579 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1580 new_dos_attributes = 0;
1581 } else {
1582 /* Windows allows a new file to be created and
1583 silently removes a FILE_ATTRIBUTE_DIRECTORY
1584 sent by the client. Do the same. */
1585
1586 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1587
1588 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1589 * created new. */
1590 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1591 smb_fname, parent_dir);
1592 }
1593
1594 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1595 "access_mask=0x%x share_access=0x%x "
1596 "create_disposition = 0x%x create_options=0x%x "
1597 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1598 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1599 access_mask, share_access, create_disposition,
1600 create_options, (unsigned int)unx_mode, oplock_request,
1601 (unsigned int)private_flags));
1602
1603 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1604 DEBUG(0, ("No smb request but not an internal only open!\n"));
1605 return NT_STATUS_INTERNAL_ERROR;
1606 }
1607
1608 /*
1609 * Only non-internal opens can be deferred at all
1610 */
1611
1612 if (req) {
1613 void *ptr;
1614 if (get_deferred_open_message_state(req,
1615 &request_time,
1616 &ptr)) {
1617
1618 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1619 /* Remember the absolute time of the original
1620 request with this mid. We'll use it later to
1621 see if this has timed out. */
1622
1623 /* Remove the deferred open entry under lock. */
1624 remove_deferred_open_entry(
1625 state->id, req->mid,
1626 sconn_server_id(req->sconn));
1627
1628 /* Ensure we don't reprocess this message. */
1629 remove_deferred_open_message_smb(req->mid);
1630 }
1631 }
1632
1633 if (!posix_open) {
1634 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1635 if (file_existed) {
1636 existing_dos_attributes = dos_mode(conn, smb_fname);
1637 }
1638 }
1639
1640 /* ignore any oplock requests if oplocks are disabled */
1641 if (!lp_oplocks(SNUM(conn)) ||
1642 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1643 /* Mask off everything except the private Samba bits. */
1644 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1645 }
1646
1647 /* this is for OS/2 long file names - say we don't support them */
1648 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1649 /* OS/2 Workplace shell fix may be main code stream in a later
1650 * release. */
1651 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1652 "supported.\n"));
1653 if (use_nt_status()) {
1654 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1655 }
1656 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1657 }
1658
1659 switch( create_disposition ) {
1660 /*
1661 * Currently we're using FILE_SUPERSEDE as the same as
1662 * FILE_OVERWRITE_IF but they really are
1663 * different. FILE_SUPERSEDE deletes an existing file
1664 * (requiring delete access) then recreates it.
1665 */
1666 case FILE_SUPERSEDE:
1667 /* If file exists replace/overwrite. If file doesn't
1668 * exist create. */
1669 flags2 |= (O_CREAT | O_TRUNC);
1670 clear_ads = true;
1671 break;
1672
1673 case FILE_OVERWRITE_IF:
1674 /* If file exists replace/overwrite. If file doesn't
1675 * exist create. */
1676 flags2 |= (O_CREAT | O_TRUNC);
1677 clear_ads = true;
1678 break;
1679
1680 case FILE_OPEN:
1681 /* If file exists open. If file doesn't exist error. */
1682 if (!file_existed) {
1683 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1684 "requested for file %s and file "
1685 "doesn't exist.\n",
1686 smb_fname_str_dbg(smb_fname)));
1687 errno = ENOENT;
1688 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1689 }
1690 break;
1691
1692 case FILE_OVERWRITE:
1693 /* If file exists overwrite. If file doesn't exist
1694 * error. */
1695 if (!file_existed) {
1696 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1697 "requested for file %s and file "
1698 "doesn't exist.\n",
1699 smb_fname_str_dbg(smb_fname) ));
1700 errno = ENOENT;
1701 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1702 }
1703 flags2 |= O_TRUNC;
1704 clear_ads = true;
1705 break;
1706
1707 case FILE_CREATE:
1708 /* If file exists error. If file doesn't exist
1709 * create. */
1710 if (file_existed) {
1711 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1712 "requested for file %s and file "
1713 "already exists.\n",
1714 smb_fname_str_dbg(smb_fname)));
1715 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1716 errno = EISDIR;
1717 } else {
1718 errno = EEXIST;
1719 }
1720 return map_nt_error_from_unix(errno);
1721 }
1722 flags2 |= (O_CREAT|O_EXCL);
1723 break;
1724
1725 case FILE_OPEN_IF:
1726 /* If file exists open. If file doesn't exist
1727 * create. */
1728 flags2 |= O_CREAT;
1729 break;
1730
1731 default:
1732 return NT_STATUS_INVALID_PARAMETER;
1733 }
1734
1735 /* We only care about matching attributes on file exists and
1736 * overwrite. */
1737
1738 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1739 (create_disposition == FILE_OVERWRITE_IF))) {
1740 if (!open_match_attributes(conn, existing_dos_attributes,
1741 new_dos_attributes,
1742 smb_fname->st.st_ex_mode,
1743 unx_mode, &new_unx_mode)) {
1744 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1745 "for file %s (%x %x) (0%o, 0%o)\n",
1746 smb_fname_str_dbg(smb_fname),
1747 existing_dos_attributes,
1748 new_dos_attributes,
1749 (unsigned int)smb_fname->st.st_ex_mode,
1750 (unsigned int)unx_mode ));
1751 errno = EACCES;
1752 return NT_STATUS_ACCESS_DENIED;
1753 }
1754 }
1755
1756 status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1757 access_mask,
1758 &access_mask);
1759 if (!NT_STATUS_IS_OK(status)) {
1760 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1761 "on file %s returned %s\n",
1762 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1763 return status;
1764 }
1765
1766 open_access_mask = access_mask;
1767
1768 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1769 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1770 }
1771
1772 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1773 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1774 access_mask));
1775
1776 /*
1777 * Note that we ignore the append flag as append does not
1778 * mean the same thing under DOS and Unix.
1779 */
1780
1781 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1782 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1783 /* DENY_DOS opens are always underlying read-write on the
1784 file handle, no matter what the requested access mask
1785 says. */
1786 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1787 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1788 flags = O_RDWR;
1789 } else {
1790 flags = O_WRONLY;
1791 }
1792 } else {
1793 flags = O_RDONLY;
1794 }
1795
1796 /*
1797 * Currently we only look at FILE_WRITE_THROUGH for create options.
1798 */
1799
1800#if defined(O_SYNC)
1801 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1802 flags2 |= O_SYNC;
1803 }
1804#endif /* O_SYNC */
1805
1806 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1807 flags2 |= O_APPEND;
1808 }
1809
1810 if (!posix_open && !CAN_WRITE(conn)) {
1811 /*
1812 * We should really return a permission denied error if either
1813 * O_CREAT or O_TRUNC are set, but for compatibility with
1814 * older versions of Samba we just AND them out.
1815 */
1816 flags2 &= ~(O_CREAT|O_TRUNC);
1817 }
1818
1819 /*
1820 * Ensure we can't write on a read-only share or file.
1821 */
1822
1823 if (flags != O_RDONLY && file_existed &&
1824 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1825 DEBUG(5,("open_file_ntcreate: write access requested for "
1826 "file %s on read only %s\n",
1827 smb_fname_str_dbg(smb_fname),
1828 !CAN_WRITE(conn) ? "share" : "file" ));
1829 errno = EACCES;
1830 return NT_STATUS_ACCESS_DENIED;
1831 }
1832
1833 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1834 fsp->share_access = share_access;
1835 fsp->fh->private_options = private_flags;
1836 fsp->access_mask = open_access_mask; /* We change this to the
1837 * requested access_mask after
1838 * the open is done. */
1839 fsp->posix_open = posix_open;
1840
1841 /* Ensure no SAMBA_PRIVATE bits can be set. */
1842 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1843
1844 if (timeval_is_zero(&request_time)) {
1845 request_time = fsp->open_time;
1846 }
1847
1848 if (file_existed) {
1849 struct byte_range_lock *br_lck = NULL;
1850 struct share_mode_entry *batch_entry = NULL;
1851 struct share_mode_entry *exclusive_entry = NULL;
1852 bool got_level2_oplock = false;
1853 bool got_a_none_oplock = false;
1854
1855 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1856 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1857
1858 if (!acquire_ordered_locks(talloc_tos(),
1859 fsp,
1860 id,
1861 conn->connectpath,
1862 smb_fname,
1863 &old_write_time,
1864 &lck,
1865 &br_lck)) {
1866 return NT_STATUS_SHARING_VIOLATION;
1867 }
1868
1869 /* Get the types we need to examine. */
1870 find_oplock_types(fsp,
1871 oplock_request,
1872 lck,
1873 &batch_entry,
1874 &exclusive_entry,
1875 &got_level2_oplock,
1876 &got_a_none_oplock);
1877
1878 /* First pass - send break only on batch oplocks. */
1879 if ((req != NULL) &&
1880 delay_for_batch_oplocks(fsp,
1881 req->mid,
1882 oplock_request,
1883 batch_entry)) {
1884 schedule_defer_open(lck, request_time, req);
1885 TALLOC_FREE(lck);
1886 return NT_STATUS_SHARING_VIOLATION;
1887 }
1888
1889 /* Use the client requested access mask here, not the one we
1890 * open with. */
1891 status = open_mode_check(conn, lck, fsp->name_hash,
1892 access_mask, share_access,
1893 create_options, &file_existed);
1894
1895 if (NT_STATUS_IS_OK(status)) {
1896 /* We might be going to allow this open. Check oplock
1897 * status again. */
1898 /* Second pass - send break for both batch or
1899 * exclusive oplocks. */
1900 if ((req != NULL) &&
1901 delay_for_exclusive_oplocks(
1902 fsp,
1903 req->mid,
1904 oplock_request,
1905 exclusive_entry)) {
1906 schedule_defer_open(lck, request_time, req);
1907 TALLOC_FREE(lck);
1908 return NT_STATUS_SHARING_VIOLATION;
1909 }
1910 }
1911
1912 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1913 /* DELETE_PENDING is not deferred for a second */
1914 TALLOC_FREE(lck);
1915 return status;
1916 }
1917
1918 grant_fsp_oplock_type(fsp,
1919 br_lck,
1920 oplock_request,
1921 got_level2_oplock,
1922 got_a_none_oplock);
1923
1924 if (!NT_STATUS_IS_OK(status)) {
1925 uint32 can_access_mask;
1926 bool can_access = True;
1927
1928 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1929
1930 /* Check if this can be done with the deny_dos and fcb
1931 * calls. */
1932 if (private_flags &
1933 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1934 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1935 if (req == NULL) {
1936 DEBUG(0, ("DOS open without an SMB "
1937 "request!\n"));
1938 TALLOC_FREE(lck);
1939 return NT_STATUS_INTERNAL_ERROR;
1940 }
1941
1942 /* Use the client requested access mask here,
1943 * not the one we open with. */
1944 status = fcb_or_dos_open(req,
1945 conn,
1946 fsp,
1947 smb_fname,
1948 id,
1949 req->smbpid,
1950 req->vuid,
1951 access_mask,
1952 share_access,
1953 create_options);
1954
1955 if (NT_STATUS_IS_OK(status)) {
1956 TALLOC_FREE(lck);
1957 if (pinfo) {
1958 *pinfo = FILE_WAS_OPENED;
1959 }
1960 return NT_STATUS_OK;
1961 }
1962 }
1963
1964 /*
1965 * This next line is a subtlety we need for
1966 * MS-Access. If a file open will fail due to share
1967 * permissions and also for security (access) reasons,
1968 * we need to return the access failed error, not the
1969 * share error. We can't open the file due to kernel
1970 * oplock deadlock (it's possible we failed above on
1971 * the open_mode_check()) so use a userspace check.
1972 */
1973
1974 if (flags & O_RDWR) {
1975 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1976 } else if (flags & O_WRONLY) {
1977 can_access_mask = FILE_WRITE_DATA;
1978 } else {
1979 can_access_mask = FILE_READ_DATA;
1980 }
1981
1982 if (((can_access_mask & FILE_WRITE_DATA) &&
1983 !CAN_WRITE(conn)) ||
1984 !can_access_file_data(conn, smb_fname,
1985 can_access_mask)) {
1986 can_access = False;
1987 }
1988
1989 /*
1990 * If we're returning a share violation, ensure we
1991 * cope with the braindead 1 second delay.
1992 */
1993
1994 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1995 lp_defer_sharing_violations()) {
1996 struct timeval timeout;
1997 struct deferred_open_record state;
1998 int timeout_usecs;
1999
2000 /* this is a hack to speed up torture tests
2001 in 'make test' */
2002 timeout_usecs = lp_parm_int(SNUM(conn),
2003 "smbd","sharedelay",
2004 SHARING_VIOLATION_USEC_WAIT);
2005
2006 /* This is a relative time, added to the absolute
2007 request_time value to get the absolute timeout time.
2008 Note that if this is the second or greater time we enter
2009 this codepath for this particular request mid then
2010 request_time is left as the absolute time of the *first*
2011 time this request mid was processed. This is what allows
2012 the request to eventually time out. */
2013
2014 timeout = timeval_set(0, timeout_usecs);
2015
2016 /* Nothing actually uses state.delayed_for_oplocks
2017 but it's handy to differentiate in debug messages
2018 between a 30 second delay due to oplock break, and
2019 a 1 second delay for share mode conflicts. */
2020
2021 state.delayed_for_oplocks = False;
2022 state.id = id;
2023
2024 if ((req != NULL)
2025 && !request_timed_out(request_time,
2026 timeout)) {
2027 defer_open(lck, request_time, timeout,
2028 req, &state);
2029 }
2030 }
2031
2032 TALLOC_FREE(lck);
2033 if (can_access) {
2034 /*
2035 * We have detected a sharing violation here
2036 * so return the correct error code
2037 */
2038 status = NT_STATUS_SHARING_VIOLATION;
2039 } else {
2040 status = NT_STATUS_ACCESS_DENIED;
2041 }
2042 return status;
2043 }
2044
2045 /*
2046 * We exit this block with the share entry *locked*.....
2047 */
2048 }
2049
2050 SMB_ASSERT(!file_existed || (lck != NULL));
2051
2052 /*
2053 * Ensure we pay attention to default ACLs on directories if required.
2054 */
2055
2056 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2057 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2058 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2059 }
2060
2061 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2062 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2063 (unsigned int)flags, (unsigned int)flags2,
2064 (unsigned int)unx_mode, (unsigned int)access_mask,
2065 (unsigned int)open_access_mask));
2066
2067 /*
2068 * open_file strips any O_TRUNC flags itself.
2069 */
2070
2071 fsp_open = open_file(fsp, conn, req, parent_dir,
2072 flags|flags2, unx_mode, access_mask,
2073 open_access_mask);
2074
2075 if (!NT_STATUS_IS_OK(fsp_open)) {
2076 if (lck != NULL) {
2077 TALLOC_FREE(lck);
2078 }
2079 return fsp_open;
2080 }
2081
2082 if (!file_existed) {
2083 struct byte_range_lock *br_lck = NULL;
2084 struct share_mode_entry *batch_entry = NULL;
2085 struct share_mode_entry *exclusive_entry = NULL;
2086 bool got_level2_oplock = false;
2087 bool got_a_none_oplock = false;
2088 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2089 /*
2090 * Deal with the race condition where two smbd's detect the
2091 * file doesn't exist and do the create at the same time. One
2092 * of them will win and set a share mode, the other (ie. this
2093 * one) should check if the requested share mode for this
2094 * create is allowed.
2095 */
2096
2097 /*
2098 * Now the file exists and fsp is successfully opened,
2099 * fsp->dev and fsp->inode are valid and should replace the
2100 * dev=0,inode=0 from a non existent file. Spotted by
2101 * Nadav Danieli <nadavd@exanet.com>. JRA.
2102 */
2103
2104 id = fsp->file_id;
2105
2106 if (!acquire_ordered_locks(talloc_tos(),
2107 fsp,
2108 id,
2109 conn->connectpath,
2110 smb_fname,
2111 &old_write_time,
2112 &lck,
2113 &br_lck)) {
2114 return NT_STATUS_SHARING_VIOLATION;
2115 }
2116
2117 /* Get the types we need to examine. */
2118 find_oplock_types(fsp,
2119 oplock_request,
2120 lck,
2121 &batch_entry,
2122 &exclusive_entry,
2123 &got_level2_oplock,
2124 &got_a_none_oplock);
2125
2126 /* First pass - send break only on batch oplocks. */
2127 if ((req != NULL) &&
2128 delay_for_batch_oplocks(fsp,
2129 req->mid,
2130 oplock_request,
2131 batch_entry)) {
2132 schedule_defer_open(lck, request_time, req);
2133 TALLOC_FREE(lck);
2134 fd_close(fsp);
2135 return NT_STATUS_SHARING_VIOLATION;
2136 }
2137
2138 status = open_mode_check(conn, lck, fsp->name_hash,
2139 access_mask, share_access,
2140 create_options, &file_existed);
2141
2142 if (NT_STATUS_IS_OK(status)) {
2143 /* We might be going to allow this open. Check oplock
2144 * status again. */
2145 /* Second pass - send break for both batch or
2146 * exclusive oplocks. */
2147 if ((req != NULL) &&
2148 delay_for_exclusive_oplocks(
2149 fsp,
2150 req->mid,
2151 oplock_request,
2152 exclusive_entry)) {
2153 schedule_defer_open(lck, request_time, req);
2154 TALLOC_FREE(lck);
2155 fd_close(fsp);
2156 return NT_STATUS_SHARING_VIOLATION;
2157 }
2158 }
2159
2160 if (!NT_STATUS_IS_OK(status)) {
2161 struct deferred_open_record state;
2162
2163 fd_close(fsp);
2164
2165 state.delayed_for_oplocks = False;
2166 state.id = id;
2167
2168 /* Do it all over again immediately. In the second
2169 * round we will find that the file existed and handle
2170 * the DELETE_PENDING and FCB cases correctly. No need
2171 * to duplicate the code here. Essentially this is a
2172 * "goto top of this function", but don't tell
2173 * anybody... */
2174
2175 if (req != NULL) {
2176 defer_open(lck, request_time, timeval_zero(),
2177 req, &state);
2178 }
2179 TALLOC_FREE(lck);
2180 return status;
2181 }
2182
2183 grant_fsp_oplock_type(fsp,
2184 br_lck,
2185 oplock_request,
2186 got_level2_oplock,
2187 got_a_none_oplock);
2188
2189 /*
2190 * We exit this block with the share entry *locked*.....
2191 */
2192
2193 }
2194
2195 SMB_ASSERT(lck != NULL);
2196
2197 /* Delete streams if create_disposition requires it */
2198 if (file_existed && clear_ads &&
2199 !is_ntfs_stream_smb_fname(smb_fname)) {
2200 status = delete_all_streams(conn, smb_fname->base_name);
2201 if (!NT_STATUS_IS_OK(status)) {
2202 TALLOC_FREE(lck);
2203 fd_close(fsp);
2204 return status;
2205 }
2206 }
2207
2208 /* note that we ignore failure for the following. It is
2209 basically a hack for NFS, and NFS will never set one of
2210 these only read them. Nobody but Samba can ever set a deny
2211 mode and we have already checked our more authoritative
2212 locking database for permission to set this deny mode. If
2213 the kernel refuses the operations then the kernel is wrong.
2214 note that GPFS supports it as well - jmcd */
2215
2216 if (fsp->fh->fd != -1) {
2217 int ret_flock;
2218 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2219 if(ret_flock == -1 ){
2220
2221 TALLOC_FREE(lck);
2222 fd_close(fsp);
2223
2224 return NT_STATUS_SHARING_VIOLATION;
2225 }
2226 }
2227
2228 /*
2229 * At this point onwards, we can guarentee that the share entry
2230 * is locked, whether we created the file or not, and that the
2231 * deny mode is compatible with all current opens.
2232 */
2233
2234 /*
2235 * If requested, truncate the file.
2236 */
2237
2238 if (file_existed && (flags2&O_TRUNC)) {
2239 /*
2240 * We are modifing the file after open - update the stat
2241 * struct..
2242 */
2243 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2244 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2245 status = map_nt_error_from_unix(errno);
2246 TALLOC_FREE(lck);
2247 fd_close(fsp);
2248 return status;
2249 }
2250 }
2251
2252 /*
2253 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2254 * but we don't have to store this - just ignore it on access check.
2255 */
2256 if (conn->sconn->using_smb2) {
2257 /*
2258 * SMB2 doesn't return it (according to Microsoft tests).
2259 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2260 * File created with access = 0x7 (Read, Write, Delete)
2261 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2262 */
2263 fsp->access_mask = access_mask;
2264 } else {
2265 /* But SMB1 does. */
2266 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2267 }
2268
2269 if (file_existed) {
2270 /* stat opens on existing files don't get oplocks. */
2271 if (is_stat_open(open_access_mask)) {
2272 fsp->oplock_type = NO_OPLOCK;
2273 }
2274
2275 if (!(flags2 & O_TRUNC)) {
2276 info = FILE_WAS_OPENED;
2277 } else {
2278 info = FILE_WAS_OVERWRITTEN;
2279 }
2280 } else {
2281 info = FILE_WAS_CREATED;
2282 }
2283
2284 if (pinfo) {
2285 *pinfo = info;
2286 }
2287
2288 /*
2289 * Setup the oplock info in both the shared memory and
2290 * file structs.
2291 */
2292
2293 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2294 /*
2295 * Could not get the kernel oplock or there are byte-range
2296 * locks on the file.
2297 */
2298 fsp->oplock_type = NO_OPLOCK;
2299 }
2300
2301 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2302 new_file_created = True;
2303 }
2304
2305 set_share_mode(lck, fsp, get_current_uid(conn),
2306 req ? req->mid : 0,
2307 fsp->oplock_type);
2308
2309 /* Handle strange delete on close create semantics. */
2310 if (create_options & FILE_DELETE_ON_CLOSE) {
2311
2312 status = can_set_delete_on_close(fsp, new_dos_attributes);
2313
2314 if (!NT_STATUS_IS_OK(status)) {
2315 /* Remember to delete the mode we just added. */
2316 del_share_mode(lck, fsp);
2317 TALLOC_FREE(lck);
2318 fd_close(fsp);
2319 return status;
2320 }
2321 /* Note that here we set the *inital* delete on close flag,
2322 not the regular one. The magic gets handled in close. */
2323 fsp->initial_delete_on_close = True;
2324 }
2325
2326 if (new_file_created) {
2327 /* Files should be initially set as archive */
2328 if (lp_map_archive(SNUM(conn)) ||
2329 lp_store_dos_attributes(SNUM(conn))) {
2330 if (!posix_open) {
2331 if (file_set_dosmode(conn, smb_fname,
2332 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2333 parent_dir, true) == 0) {
2334 unx_mode = smb_fname->st.st_ex_mode;
2335 }
2336 }
2337 }
2338 }
2339
2340 /* Determine sparse flag. */
2341 if (posix_open) {
2342 /* POSIX opens are sparse by default. */
2343 fsp->is_sparse = true;
2344 } else {
2345 fsp->is_sparse = (file_existed &&
2346 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2347 }
2348
2349 /*
2350 * Take care of inherited ACLs on created files - if default ACL not
2351 * selected.
2352 */
2353
2354 if (!posix_open && !file_existed && !def_acl) {
2355
2356 int saved_errno = errno; /* We might get ENOSYS in the next
2357 * call.. */
2358
2359 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2360 errno == ENOSYS) {
2361 errno = saved_errno; /* Ignore ENOSYS */
2362 }
2363
2364 } else if (new_unx_mode) {
2365
2366 int ret = -1;
2367
2368 /* Attributes need changing. File already existed. */
2369
2370 {
2371 int saved_errno = errno; /* We might get ENOSYS in the
2372 * next call.. */
2373 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2374
2375 if (ret == -1 && errno == ENOSYS) {
2376 errno = saved_errno; /* Ignore ENOSYS */
2377 } else {
2378 DEBUG(5, ("open_file_ntcreate: reset "
2379 "attributes of file %s to 0%o\n",
2380 smb_fname_str_dbg(smb_fname),
2381 (unsigned int)new_unx_mode));
2382 ret = 0; /* Don't do the fchmod below. */
2383 }
2384 }
2385
2386 if ((ret == -1) &&
2387 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2388 DEBUG(5, ("open_file_ntcreate: failed to reset "
2389 "attributes of file %s to 0%o\n",
2390 smb_fname_str_dbg(smb_fname),
2391 (unsigned int)new_unx_mode));
2392 }
2393
2394 /* If this is a successful open, we must remove any deferred open
2395 * records. */
2396 if (req != NULL) {
2397 del_deferred_open_entry(lck, req->mid,
2398 sconn_server_id(req->sconn));
2399 }
2400 TALLOC_FREE(lck);
2401
2402 return NT_STATUS_OK;
2403}
2404
2405
2406/****************************************************************************
2407 Open a file for for write to ensure that we can fchmod it.
2408****************************************************************************/
2409
2410NTSTATUS open_file_fchmod(connection_struct *conn,
2411 struct smb_filename *smb_fname,
2412 files_struct **result)
2413{
2414 if (!VALID_STAT(smb_fname->st)) {
2415 return NT_STATUS_INVALID_PARAMETER;
2416 }
2417
2418 return SMB_VFS_CREATE_FILE(
2419 conn, /* conn */
2420 NULL, /* req */
2421 0, /* root_dir_fid */
2422 smb_fname, /* fname */
2423 FILE_WRITE_DATA, /* access_mask */
2424 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2425 FILE_SHARE_DELETE),
2426 FILE_OPEN, /* create_disposition*/
2427 0, /* create_options */
2428 0, /* file_attributes */
2429 INTERNAL_OPEN_ONLY, /* oplock_request */
2430 0, /* allocation_size */
2431 0, /* private_flags */
2432 NULL, /* sd */
2433 NULL, /* ea_list */
2434 result, /* result */
2435 NULL); /* pinfo */
2436}
2437
2438static NTSTATUS mkdir_internal(connection_struct *conn,
2439 struct smb_filename *smb_dname,
2440 uint32 file_attributes)
2441{
2442 mode_t mode;
2443 char *parent_dir;
2444 NTSTATUS status;
2445 bool posix_open = false;
2446 bool need_re_stat = false;
2447
2448 if(!CAN_WRITE(conn)) {
2449 DEBUG(5,("mkdir_internal: failing create on read-only share "
2450 "%s\n", lp_servicename(SNUM(conn))));
2451 return NT_STATUS_ACCESS_DENIED;
2452 }
2453
2454 status = check_name(conn, smb_dname->base_name);
2455 if (!NT_STATUS_IS_OK(status)) {
2456 return status;
2457 }
2458
2459 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2460 NULL)) {
2461 return NT_STATUS_NO_MEMORY;
2462 }
2463
2464 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2465 posix_open = true;
2466 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2467 } else {
2468 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2469 }
2470
2471 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2472 return map_nt_error_from_unix(errno);
2473 }
2474
2475 /* Ensure we're checking for a symlink here.... */
2476 /* We don't want to get caught by a symlink racer. */
2477
2478 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2479 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2480 smb_fname_str_dbg(smb_dname), strerror(errno)));
2481 return map_nt_error_from_unix(errno);
2482 }
2483
2484 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2485 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2486 smb_fname_str_dbg(smb_dname)));
2487 return NT_STATUS_ACCESS_DENIED;
2488 }
2489
2490 if (lp_store_dos_attributes(SNUM(conn))) {
2491 if (!posix_open) {
2492 file_set_dosmode(conn, smb_dname,
2493 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2494 parent_dir, true);
2495 }
2496 }
2497
2498 if (lp_inherit_perms(SNUM(conn))) {
2499 inherit_access_posix_acl(conn, parent_dir,
2500 smb_dname->base_name, mode);
2501 need_re_stat = true;
2502 }
2503
2504 if (!posix_open) {
2505 /*
2506 * Check if high bits should have been set,
2507 * then (if bits are missing): add them.
2508 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2509 * dir.
2510 */
2511 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2512 (mode & ~smb_dname->st.st_ex_mode)) {
2513 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2514 (smb_dname->st.st_ex_mode |
2515 (mode & ~smb_dname->st.st_ex_mode)));
2516 need_re_stat = true;
2517 }
2518 }
2519
2520 /* Change the owner if required. */
2521 if (lp_inherit_owner(SNUM(conn))) {
2522 change_dir_owner_to_parent(conn, parent_dir,
2523 smb_dname->base_name,
2524 &smb_dname->st);
2525 need_re_stat = true;
2526 }
2527
2528 if (need_re_stat) {
2529 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2530 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2531 smb_fname_str_dbg(smb_dname), strerror(errno)));
2532 return map_nt_error_from_unix(errno);
2533 }
2534 }
2535
2536 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2537 smb_dname->base_name);
2538
2539 return NT_STATUS_OK;
2540}
2541
2542/****************************************************************************
2543 Ensure we didn't get symlink raced on opening a directory.
2544****************************************************************************/
2545
2546bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2547 const SMB_STRUCT_STAT *sbuf2)
2548{
2549 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2550 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2551 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2552 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2553 return false;
2554 }
2555 return true;
2556}
2557
2558/****************************************************************************
2559 Open a directory from an NT SMB call.
2560****************************************************************************/
2561
2562static NTSTATUS open_directory(connection_struct *conn,
2563 struct smb_request *req,
2564 struct smb_filename *smb_dname,
2565 uint32 access_mask,
2566 uint32 share_access,
2567 uint32 create_disposition,
2568 uint32 create_options,
2569 uint32 file_attributes,
2570 int *pinfo,
2571 files_struct **result)
2572{
2573 files_struct *fsp = NULL;
2574 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2575 struct share_mode_lock *lck = NULL;
2576 NTSTATUS status;
2577 struct timespec mtimespec;
2578 int info = 0;
2579
2580 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2581
2582 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2583 /* Ensure we have a directory attribute. */
2584 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2585 }
2586
2587 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2588 "share_access = 0x%x create_options = 0x%x, "
2589 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2590 smb_fname_str_dbg(smb_dname),
2591 (unsigned int)access_mask,
2592 (unsigned int)share_access,
2593 (unsigned int)create_options,
2594 (unsigned int)create_disposition,
2595 (unsigned int)file_attributes));
2596
2597 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2598 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2599 is_ntfs_stream_smb_fname(smb_dname)) {
2600 DEBUG(2, ("open_directory: %s is a stream name!\n",
2601 smb_fname_str_dbg(smb_dname)));
2602 return NT_STATUS_NOT_A_DIRECTORY;
2603 }
2604
2605 status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2606 access_mask, &access_mask);
2607 if (!NT_STATUS_IS_OK(status)) {
2608 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2609 "on file %s returned %s\n",
2610 smb_fname_str_dbg(smb_dname),
2611 nt_errstr(status)));
2612 return status;
2613 }
2614
2615 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2616 !security_token_has_privilege(get_current_nttok(conn),
2617 SEC_PRIV_SECURITY)) {
2618 DEBUG(10, ("open_directory: open on %s "
2619 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2620 smb_fname_str_dbg(smb_dname)));
2621 return NT_STATUS_PRIVILEGE_NOT_HELD;
2622 }
2623
2624 switch( create_disposition ) {
2625 case FILE_OPEN:
2626
2627 if (!dir_existed) {
2628 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2629 }
2630
2631 info = FILE_WAS_OPENED;
2632 break;
2633
2634 case FILE_CREATE:
2635
2636 /* If directory exists error. If directory doesn't
2637 * exist create. */
2638
2639 status = mkdir_internal(conn, smb_dname,
2640 file_attributes);
2641
2642 if (!NT_STATUS_IS_OK(status)) {
2643 DEBUG(2, ("open_directory: unable to create "
2644 "%s. Error was %s\n",
2645 smb_fname_str_dbg(smb_dname),
2646 nt_errstr(status)));
2647 return status;
2648 }
2649
2650 info = FILE_WAS_CREATED;
2651 break;
2652
2653 case FILE_OPEN_IF:
2654 /*
2655 * If directory exists open. If directory doesn't
2656 * exist create.
2657 */
2658
2659 status = mkdir_internal(conn, smb_dname,
2660 file_attributes);
2661
2662 if (NT_STATUS_IS_OK(status)) {
2663 info = FILE_WAS_CREATED;
2664 }
2665
2666 if (NT_STATUS_EQUAL(status,
2667 NT_STATUS_OBJECT_NAME_COLLISION)) {
2668 info = FILE_WAS_OPENED;
2669 status = NT_STATUS_OK;
2670 }
2671 break;
2672
2673 case FILE_SUPERSEDE:
2674 case FILE_OVERWRITE:
2675 case FILE_OVERWRITE_IF:
2676 default:
2677 DEBUG(5,("open_directory: invalid create_disposition "
2678 "0x%x for directory %s\n",
2679 (unsigned int)create_disposition,
2680 smb_fname_str_dbg(smb_dname)));
2681 return NT_STATUS_INVALID_PARAMETER;
2682 }
2683
2684 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2685 DEBUG(5,("open_directory: %s is not a directory !\n",
2686 smb_fname_str_dbg(smb_dname)));
2687 return NT_STATUS_NOT_A_DIRECTORY;
2688 }
2689
2690 if (info == FILE_WAS_OPENED) {
2691 uint32_t access_granted = 0;
2692 status = smbd_check_open_rights(conn, smb_dname, access_mask,
2693 &access_granted);
2694
2695 /* Were we trying to do a directory open
2696 * for delete and didn't get DELETE
2697 * access (only) ? Check if the
2698 * directory allows DELETE_CHILD.
2699 * See here:
2700 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
2701 * for details. */
2702
2703 if ((NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
2704 (access_mask & DELETE_ACCESS) &&
2705 (access_granted == DELETE_ACCESS) &&
2706 can_delete_file_in_directory(conn, smb_dname))) {
2707 DEBUG(10,("open_directory: overrode ACCESS_DENIED "
2708 "on directory %s\n",
2709 smb_fname_str_dbg(smb_dname)));
2710 status = NT_STATUS_OK;
2711 }
2712
2713 if (!NT_STATUS_IS_OK(status)) {
2714 DEBUG(10, ("open_directory: smbd_check_open_rights on "
2715 "file %s failed with %s\n",
2716 smb_fname_str_dbg(smb_dname),
2717 nt_errstr(status)));
2718 return status;
2719 }
2720 }
2721
2722 status = file_new(req, conn, &fsp);
2723 if(!NT_STATUS_IS_OK(status)) {
2724 return status;
2725 }
2726
2727 /*
2728 * Setup the files_struct for it.
2729 */
2730
2731 fsp->mode = smb_dname->st.st_ex_mode;
2732 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2733 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2734 fsp->file_pid = req ? req->smbpid : 0;
2735 fsp->can_lock = False;
2736 fsp->can_read = False;
2737 fsp->can_write = False;
2738
2739 fsp->share_access = share_access;
2740 fsp->fh->private_options = 0;
2741 fsp->print_file = NULL;
2742 fsp->modified = False;
2743 fsp->oplock_type = NO_OPLOCK;
2744 fsp->sent_oplock_break = NO_BREAK_SENT;
2745 fsp->is_directory = True;
2746 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2747 status = fsp_set_smb_fname(fsp, smb_dname);
2748 if (!NT_STATUS_IS_OK(status)) {
2749 file_free(req, fsp);
2750 return status;
2751 }
2752
2753 mtimespec = smb_dname->st.st_ex_mtime;
2754
2755 /* Temporary access mask used to open the directory fd. */
2756 fsp->access_mask = FILE_READ_DATA | FILE_READ_ATTRIBUTES;
2757#ifdef O_DIRECTORY
2758 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2759#else
2760 /* POSIX allows us to open a directory with O_RDONLY. */
2761 status = fd_open(conn, fsp, O_RDONLY, 0);
2762#endif
2763 if (!NT_STATUS_IS_OK(status)) {
2764 DEBUG(5, ("open_directory: Could not open fd for "
2765 "%s (%s)\n",
2766 smb_fname_str_dbg(smb_dname),
2767 nt_errstr(status)));
2768 file_free(req, fsp);
2769 return status;
2770 }
2771
2772 /*
2773 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2774 * Set the real access mask for later access (possibly delete).
2775 */
2776 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2777
2778 status = vfs_stat_fsp(fsp);
2779 if (!NT_STATUS_IS_OK(status)) {
2780 fd_close(fsp);
2781 file_free(req, fsp);
2782 return status;
2783 }
2784
2785 /* Ensure there was no race condition. */
2786 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2787 DEBUG(5,("open_directory: stat struct differs for "
2788 "directory %s.\n",
2789 smb_fname_str_dbg(smb_dname)));
2790 fd_close(fsp);
2791 file_free(req, fsp);
2792 return NT_STATUS_ACCESS_DENIED;
2793 }
2794
2795 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2796 conn->connectpath, smb_dname, &mtimespec);
2797
2798 if (lck == NULL) {
2799 DEBUG(0, ("open_directory: Could not get share mode lock for "
2800 "%s\n", smb_fname_str_dbg(smb_dname)));
2801 fd_close(fsp);
2802 file_free(req, fsp);
2803 return NT_STATUS_SHARING_VIOLATION;
2804 }
2805
2806 status = open_mode_check(conn, lck, fsp->name_hash,
2807 access_mask, share_access,
2808 create_options, &dir_existed);
2809
2810 if (!NT_STATUS_IS_OK(status)) {
2811 TALLOC_FREE(lck);
2812 fd_close(fsp);
2813 file_free(req, fsp);
2814 return status;
2815 }
2816
2817 set_share_mode(lck, fsp, get_current_uid(conn),
2818 req ? req->mid : 0, NO_OPLOCK);
2819
2820 /* For directories the delete on close bit at open time seems
2821 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2822 if (create_options & FILE_DELETE_ON_CLOSE) {
2823 status = can_set_delete_on_close(fsp, 0);
2824 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2825 TALLOC_FREE(lck);
2826 fd_close(fsp);
2827 file_free(req, fsp);
2828 return status;
2829 }
2830
2831 if (NT_STATUS_IS_OK(status)) {
2832 /* Note that here we set the *inital* delete on close flag,
2833 not the regular one. The magic gets handled in close. */
2834 fsp->initial_delete_on_close = True;
2835 }
2836 }
2837
2838 TALLOC_FREE(lck);
2839
2840 if (pinfo) {
2841 *pinfo = info;
2842 }
2843
2844 *result = fsp;
2845 return NT_STATUS_OK;
2846}
2847
2848NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2849 struct smb_filename *smb_dname)
2850{
2851 NTSTATUS status;
2852 files_struct *fsp;
2853
2854 status = SMB_VFS_CREATE_FILE(
2855 conn, /* conn */
2856 req, /* req */
2857 0, /* root_dir_fid */
2858 smb_dname, /* fname */
2859 FILE_READ_ATTRIBUTES, /* access_mask */
2860 FILE_SHARE_NONE, /* share_access */
2861 FILE_CREATE, /* create_disposition*/
2862 FILE_DIRECTORY_FILE, /* create_options */
2863 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2864 0, /* oplock_request */
2865 0, /* allocation_size */
2866 0, /* private_flags */
2867 NULL, /* sd */
2868 NULL, /* ea_list */
2869 &fsp, /* result */
2870 NULL); /* pinfo */
2871
2872 if (NT_STATUS_IS_OK(status)) {
2873 close_file(req, fsp, NORMAL_CLOSE);
2874 }
2875
2876 return status;
2877}
2878
2879/****************************************************************************
2880 Receive notification that one of our open files has been renamed by another
2881 smbd process.
2882****************************************************************************/
2883
2884void msg_file_was_renamed(struct messaging_context *msg,
2885 void *private_data,
2886 uint32_t msg_type,
2887 struct server_id server_id,
2888 DATA_BLOB *data)
2889{
2890 struct smbd_server_connection *sconn;
2891 files_struct *fsp;
2892 char *frm = (char *)data->data;
2893 struct file_id id;
2894 const char *sharepath;
2895 const char *base_name;
2896 const char *stream_name;
2897 struct smb_filename *smb_fname = NULL;
2898 size_t sp_len, bn_len;
2899 NTSTATUS status;
2900
2901 sconn = msg_ctx_to_sconn(msg);
2902 if (sconn == NULL) {
2903 DEBUG(1, ("could not find sconn\n"));
2904 return;
2905 }
2906
2907 if (data->data == NULL
2908 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2909 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2910 (int)data->length));
2911 return;
2912 }
2913
2914 /* Unpack the message. */
2915 pull_file_id_24(frm, &id);
2916 sharepath = &frm[24];
2917 sp_len = strlen(sharepath);
2918 base_name = sharepath + sp_len + 1;
2919 bn_len = strlen(base_name);
2920 stream_name = sharepath + sp_len + 1 + bn_len + 1;
2921
2922 /* stream_name must always be NULL if there is no stream. */
2923 if (stream_name[0] == '\0') {
2924 stream_name = NULL;
2925 }
2926
2927 status = create_synthetic_smb_fname(talloc_tos(), base_name,
2928 stream_name, NULL, &smb_fname);
2929 if (!NT_STATUS_IS_OK(status)) {
2930 return;
2931 }
2932
2933 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2934 "file_id %s\n",
2935 sharepath, smb_fname_str_dbg(smb_fname),
2936 file_id_string_tos(&id)));
2937
2938 for(fsp = file_find_di_first(sconn, id); fsp;
2939 fsp = file_find_di_next(fsp)) {
2940 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2941
2942 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2943 fsp->fnum, fsp_str_dbg(fsp),
2944 smb_fname_str_dbg(smb_fname)));
2945 status = fsp_set_smb_fname(fsp, smb_fname);
2946 if (!NT_STATUS_IS_OK(status)) {
2947 goto out;
2948 }
2949 } else {
2950 /* TODO. JRA. */
2951 /* Now we have the complete path we can work out if this is
2952 actually within this share and adjust newname accordingly. */
2953 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2954 "not sharepath %s) "
2955 "fnum %d from %s -> %s\n",
2956 fsp->conn->connectpath,
2957 sharepath,
2958 fsp->fnum,
2959 fsp_str_dbg(fsp),
2960 smb_fname_str_dbg(smb_fname)));
2961 }
2962 }
2963 out:
2964 TALLOC_FREE(smb_fname);
2965 return;
2966}
2967
2968/*
2969 * If a main file is opened for delete, all streams need to be checked for
2970 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2971 * If that works, delete them all by setting the delete on close and close.
2972 */
2973
2974NTSTATUS open_streams_for_delete(connection_struct *conn,
2975 const char *fname)
2976{
2977 struct stream_struct *stream_info = NULL;
2978 files_struct **streams = NULL;
2979 int i;
2980 unsigned int num_streams = 0;
2981 TALLOC_CTX *frame = talloc_stackframe();
2982 NTSTATUS status;
2983
2984 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
2985 &num_streams, &stream_info);
2986
2987 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2988 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2989 DEBUG(10, ("no streams around\n"));
2990 TALLOC_FREE(frame);
2991 return NT_STATUS_OK;
2992 }
2993
2994 if (!NT_STATUS_IS_OK(status)) {
2995 DEBUG(10, ("vfs_streaminfo failed: %s\n",
2996 nt_errstr(status)));
2997 goto fail;
2998 }
2999
3000 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3001 num_streams));
3002
3003 if (num_streams == 0) {
3004 TALLOC_FREE(frame);
3005 return NT_STATUS_OK;
3006 }
3007
3008 streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
3009 if (streams == NULL) {
3010 DEBUG(0, ("talloc failed\n"));
3011 status = NT_STATUS_NO_MEMORY;
3012 goto fail;
3013 }
3014
3015 for (i=0; i<num_streams; i++) {
3016 struct smb_filename *smb_fname = NULL;
3017
3018 if (strequal(stream_info[i].name, "::$DATA")) {
3019 streams[i] = NULL;
3020 continue;
3021 }
3022
3023 status = create_synthetic_smb_fname(talloc_tos(), fname,
3024 stream_info[i].name,
3025 NULL, &smb_fname);
3026 if (!NT_STATUS_IS_OK(status)) {
3027 goto fail;
3028 }
3029
3030 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3031 DEBUG(10, ("Unable to stat stream: %s\n",
3032 smb_fname_str_dbg(smb_fname)));
3033 }
3034
3035 status = SMB_VFS_CREATE_FILE(
3036 conn, /* conn */
3037 NULL, /* req */
3038 0, /* root_dir_fid */
3039 smb_fname, /* fname */
3040 DELETE_ACCESS, /* access_mask */
3041 (FILE_SHARE_READ | /* share_access */
3042 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3043 FILE_OPEN, /* create_disposition*/
3044 0, /* create_options */
3045 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3046 0, /* oplock_request */
3047 0, /* allocation_size */
3048 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3049 NULL, /* sd */
3050 NULL, /* ea_list */
3051 &streams[i], /* result */
3052 NULL); /* pinfo */
3053
3054 if (!NT_STATUS_IS_OK(status)) {
3055 DEBUG(10, ("Could not open stream %s: %s\n",
3056 smb_fname_str_dbg(smb_fname),
3057 nt_errstr(status)));
3058
3059 TALLOC_FREE(smb_fname);
3060 break;
3061 }
3062 TALLOC_FREE(smb_fname);
3063 }
3064
3065 /*
3066 * don't touch the variable "status" beyond this point :-)
3067 */
3068
3069 for (i -= 1 ; i >= 0; i--) {
3070 if (streams[i] == NULL) {
3071 continue;
3072 }
3073
3074 DEBUG(10, ("Closing stream # %d, %s\n", i,
3075 fsp_str_dbg(streams[i])));
3076 close_file(NULL, streams[i], NORMAL_CLOSE);
3077 }
3078
3079 fail:
3080 TALLOC_FREE(frame);
3081 return status;
3082}
3083
3084/*
3085 * Wrapper around open_file_ntcreate and open_directory
3086 */
3087
3088static NTSTATUS create_file_unixpath(connection_struct *conn,
3089 struct smb_request *req,
3090 struct smb_filename *smb_fname,
3091 uint32_t access_mask,
3092 uint32_t share_access,
3093 uint32_t create_disposition,
3094 uint32_t create_options,
3095 uint32_t file_attributes,
3096 uint32_t oplock_request,
3097 uint64_t allocation_size,
3098 uint32_t private_flags,
3099 struct security_descriptor *sd,
3100 struct ea_list *ea_list,
3101
3102 files_struct **result,
3103 int *pinfo)
3104{
3105 int info = FILE_WAS_OPENED;
3106 files_struct *base_fsp = NULL;
3107 files_struct *fsp = NULL;
3108 NTSTATUS status;
3109
3110 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3111 "file_attributes = 0x%x, share_access = 0x%x, "
3112 "create_disposition = 0x%x create_options = 0x%x "
3113 "oplock_request = 0x%x private_flags = 0x%x "
3114 "ea_list = 0x%p, sd = 0x%p, "
3115 "fname = %s\n",
3116 (unsigned int)access_mask,
3117 (unsigned int)file_attributes,
3118 (unsigned int)share_access,
3119 (unsigned int)create_disposition,
3120 (unsigned int)create_options,
3121 (unsigned int)oplock_request,
3122 (unsigned int)private_flags,
3123 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3124
3125 if (create_options & FILE_OPEN_BY_FILE_ID) {
3126 status = NT_STATUS_NOT_SUPPORTED;
3127 goto fail;
3128 }
3129
3130 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3131 status = NT_STATUS_INVALID_PARAMETER;
3132 goto fail;
3133 }
3134
3135 if (req == NULL) {
3136 oplock_request |= INTERNAL_OPEN_ONLY;
3137 }
3138
3139 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3140 && (access_mask & DELETE_ACCESS)
3141 && !is_ntfs_stream_smb_fname(smb_fname)) {
3142 /*
3143 * We can't open a file with DELETE access if any of the
3144 * streams is open without FILE_SHARE_DELETE
3145 */
3146 status = open_streams_for_delete(conn, smb_fname->base_name);
3147
3148 if (!NT_STATUS_IS_OK(status)) {
3149 goto fail;
3150 }
3151 }
3152
3153 /* This is the correct thing to do (check every time) but can_delete
3154 * is expensive (it may have to read the parent directory
3155 * permissions). So for now we're not doing it unless we have a strong
3156 * hint the client is really going to delete this file. If the client
3157 * is forcing FILE_CREATE let the filesystem take care of the
3158 * permissions. */
3159
3160 /* Setting FILE_SHARE_DELETE is the hint. */
3161
3162 if ((create_disposition != FILE_CREATE)
3163 && (access_mask & DELETE_ACCESS)
3164 && (!(can_delete_file_in_directory(conn, smb_fname) ||
3165 can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
3166 status = NT_STATUS_ACCESS_DENIED;
3167 DEBUG(10,("create_file_unixpath: open file %s "
3168 "for delete ACCESS_DENIED\n",
3169 smb_fname_str_dbg(smb_fname)));
3170 goto fail;
3171 }
3172
3173 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3174 !security_token_has_privilege(get_current_nttok(conn),
3175 SEC_PRIV_SECURITY)) {
3176 DEBUG(10, ("create_file_unixpath: open on %s "
3177 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3178 smb_fname_str_dbg(smb_fname)));
3179 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3180 goto fail;
3181 }
3182
3183 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3184 && is_ntfs_stream_smb_fname(smb_fname)
3185 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3186 uint32 base_create_disposition;
3187 struct smb_filename *smb_fname_base = NULL;
3188
3189 if (create_options & FILE_DIRECTORY_FILE) {
3190 status = NT_STATUS_NOT_A_DIRECTORY;
3191 goto fail;
3192 }
3193
3194 switch (create_disposition) {
3195 case FILE_OPEN:
3196 base_create_disposition = FILE_OPEN;
3197 break;
3198 default:
3199 base_create_disposition = FILE_OPEN_IF;
3200 break;
3201 }
3202
3203 /* Create an smb_filename with stream_name == NULL. */
3204 status = create_synthetic_smb_fname(talloc_tos(),
3205 smb_fname->base_name,
3206 NULL, NULL,
3207 &smb_fname_base);
3208 if (!NT_STATUS_IS_OK(status)) {
3209 goto fail;
3210 }
3211
3212 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3213 DEBUG(10, ("Unable to stat stream: %s\n",
3214 smb_fname_str_dbg(smb_fname_base)));
3215 }
3216
3217 /* Open the base file. */
3218 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3219 FILE_SHARE_READ
3220 | FILE_SHARE_WRITE
3221 | FILE_SHARE_DELETE,
3222 base_create_disposition,
3223 0, 0, 0, 0, 0, NULL, NULL,
3224 &base_fsp, NULL);
3225 TALLOC_FREE(smb_fname_base);
3226
3227 if (!NT_STATUS_IS_OK(status)) {
3228 DEBUG(10, ("create_file_unixpath for base %s failed: "
3229 "%s\n", smb_fname->base_name,
3230 nt_errstr(status)));
3231 goto fail;
3232 }
3233 /* we don't need to low level fd */
3234 fd_close(base_fsp);
3235 }
3236
3237 /*
3238 * If it's a request for a directory open, deal with it separately.
3239 */
3240
3241 if (create_options & FILE_DIRECTORY_FILE) {
3242
3243 if (create_options & FILE_NON_DIRECTORY_FILE) {
3244 status = NT_STATUS_INVALID_PARAMETER;
3245 goto fail;
3246 }
3247
3248 /* Can't open a temp directory. IFS kit test. */
3249 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3250 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3251 status = NT_STATUS_INVALID_PARAMETER;
3252 goto fail;
3253 }
3254
3255 /*
3256 * We will get a create directory here if the Win32
3257 * app specified a security descriptor in the
3258 * CreateDirectory() call.
3259 */
3260
3261 oplock_request = 0;
3262 status = open_directory(
3263 conn, req, smb_fname, access_mask, share_access,
3264 create_disposition, create_options, file_attributes,
3265 &info, &fsp);
3266 } else {
3267
3268 /*
3269 * Ordinary file case.
3270 */
3271
3272 status = file_new(req, conn, &fsp);
3273 if(!NT_STATUS_IS_OK(status)) {
3274 goto fail;
3275 }
3276
3277 status = fsp_set_smb_fname(fsp, smb_fname);
3278 if (!NT_STATUS_IS_OK(status)) {
3279 goto fail;
3280 }
3281
3282 /*
3283 * We're opening the stream element of a base_fsp
3284 * we already opened. Set up the base_fsp pointer.
3285 */
3286 if (base_fsp) {
3287 fsp->base_fsp = base_fsp;
3288 }
3289
3290 status = open_file_ntcreate(conn,
3291 req,
3292 access_mask,
3293 share_access,
3294 create_disposition,
3295 create_options,
3296 file_attributes,
3297 oplock_request,
3298 private_flags,
3299 &info,
3300 fsp);
3301
3302 if(!NT_STATUS_IS_OK(status)) {
3303 file_free(req, fsp);
3304 fsp = NULL;
3305 }
3306
3307 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3308
3309 /* A stream open never opens a directory */
3310
3311 if (base_fsp) {
3312 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3313 goto fail;
3314 }
3315
3316 /*
3317 * Fail the open if it was explicitly a non-directory
3318 * file.
3319 */
3320
3321 if (create_options & FILE_NON_DIRECTORY_FILE) {
3322 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3323 goto fail;
3324 }
3325
3326 oplock_request = 0;
3327 status = open_directory(
3328 conn, req, smb_fname, access_mask,
3329 share_access, create_disposition,
3330 create_options, file_attributes,
3331 &info, &fsp);
3332 }
3333 }
3334
3335 if (!NT_STATUS_IS_OK(status)) {
3336 goto fail;
3337 }
3338
3339 fsp->base_fsp = base_fsp;
3340
3341 /*
3342 * According to the MS documentation, the only time the security
3343 * descriptor is applied to the opened file is iff we *created* the
3344 * file; an existing file stays the same.
3345 *
3346 * Also, it seems (from observation) that you can open the file with
3347 * any access mask but you can still write the sd. We need to override
3348 * the granted access before we call set_sd
3349 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3350 */
3351
3352 if ((sd != NULL) && (info == FILE_WAS_CREATED)
3353 && lp_nt_acl_support(SNUM(conn))) {
3354
3355 uint32_t sec_info_sent;
3356 uint32_t saved_access_mask = fsp->access_mask;
3357
3358 sec_info_sent = get_sec_info(sd);
3359
3360 fsp->access_mask = FILE_GENERIC_ALL;
3361
3362 if (sec_info_sent & (SECINFO_OWNER|
3363 SECINFO_GROUP|
3364 SECINFO_DACL|
3365 SECINFO_SACL)) {
3366 status = set_sd(fsp, sd, sec_info_sent);
3367 }
3368
3369 fsp->access_mask = saved_access_mask;
3370
3371 if (!NT_STATUS_IS_OK(status)) {
3372 goto fail;
3373 }
3374 }
3375
3376 if ((ea_list != NULL) &&
3377 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3378 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3379 if (!NT_STATUS_IS_OK(status)) {
3380 goto fail;
3381 }
3382 }
3383
3384 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3385 status = NT_STATUS_ACCESS_DENIED;
3386 goto fail;
3387 }
3388
3389 /* Save the requested allocation size. */
3390 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3391 if (allocation_size
3392 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3393 fsp->initial_allocation_size = smb_roundup(
3394 fsp->conn, allocation_size);
3395 if (fsp->is_directory) {
3396 /* Can't set allocation size on a directory. */
3397 status = NT_STATUS_ACCESS_DENIED;
3398 goto fail;
3399 }
3400 if (vfs_allocate_file_space(
3401 fsp, fsp->initial_allocation_size) == -1) {
3402 status = NT_STATUS_DISK_FULL;
3403 goto fail;
3404 }
3405 } else {
3406 fsp->initial_allocation_size = smb_roundup(
3407 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3408 }
3409 }
3410
3411 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3412
3413 *result = fsp;
3414 if (pinfo != NULL) {
3415 *pinfo = info;
3416 }
3417
3418 smb_fname->st = fsp->fsp_name->st;
3419
3420 return NT_STATUS_OK;
3421
3422 fail:
3423 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3424
3425 if (fsp != NULL) {
3426 if (base_fsp && fsp->base_fsp == base_fsp) {
3427 /*
3428 * The close_file below will close
3429 * fsp->base_fsp.
3430 */
3431 base_fsp = NULL;
3432 }
3433 close_file(req, fsp, ERROR_CLOSE);
3434 fsp = NULL;
3435 }
3436 if (base_fsp != NULL) {
3437 close_file(req, base_fsp, ERROR_CLOSE);
3438 base_fsp = NULL;
3439 }
3440 return status;
3441}
3442
3443/*
3444 * Calculate the full path name given a relative fid.
3445 */
3446NTSTATUS get_relative_fid_filename(connection_struct *conn,
3447 struct smb_request *req,
3448 uint16_t root_dir_fid,
3449 const struct smb_filename *smb_fname,
3450 struct smb_filename **smb_fname_out)
3451{
3452 files_struct *dir_fsp;
3453 char *parent_fname = NULL;
3454 char *new_base_name = NULL;
3455 NTSTATUS status;
3456
3457 if (root_dir_fid == 0 || !smb_fname) {
3458 status = NT_STATUS_INTERNAL_ERROR;
3459 goto out;
3460 }
3461
3462 dir_fsp = file_fsp(req, root_dir_fid);
3463
3464 if (dir_fsp == NULL) {
3465 status = NT_STATUS_INVALID_HANDLE;
3466 goto out;
3467 }
3468
3469 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3470 status = NT_STATUS_INVALID_HANDLE;
3471 goto out;
3472 }
3473
3474 if (!dir_fsp->is_directory) {
3475
3476 /*
3477 * Check to see if this is a mac fork of some kind.
3478 */
3479
3480 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3481 is_ntfs_stream_smb_fname(smb_fname)) {
3482 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3483 goto out;
3484 }
3485
3486 /*
3487 we need to handle the case when we get a
3488 relative open relative to a file and the
3489 pathname is blank - this is a reopen!
3490 (hint from demyn plantenberg)
3491 */
3492
3493 status = NT_STATUS_INVALID_HANDLE;
3494 goto out;
3495 }
3496
3497 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3498 /*
3499 * We're at the toplevel dir, the final file name
3500 * must not contain ./, as this is filtered out
3501 * normally by srvstr_get_path and unix_convert
3502 * explicitly rejects paths containing ./.
3503 */
3504 parent_fname = talloc_strdup(talloc_tos(), "");
3505 if (parent_fname == NULL) {
3506 status = NT_STATUS_NO_MEMORY;
3507 goto out;
3508 }
3509 } else {
3510 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3511
3512 /*
3513 * Copy in the base directory name.
3514 */
3515
3516 parent_fname = TALLOC_ARRAY(talloc_tos(), char,
3517 dir_name_len+2);
3518 if (parent_fname == NULL) {
3519 status = NT_STATUS_NO_MEMORY;
3520 goto out;
3521 }
3522 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3523 dir_name_len+1);
3524
3525 /*
3526 * Ensure it ends in a '/'.
3527 * We used TALLOC_SIZE +2 to add space for the '/'.
3528 */
3529
3530 if(dir_name_len
3531 && (parent_fname[dir_name_len-1] != '\\')
3532 && (parent_fname[dir_name_len-1] != '/')) {
3533 parent_fname[dir_name_len] = '/';
3534 parent_fname[dir_name_len+1] = '\0';
3535 }
3536 }
3537
3538 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3539 smb_fname->base_name);
3540 if (new_base_name == NULL) {
3541 status = NT_STATUS_NO_MEMORY;
3542 goto out;
3543 }
3544
3545 status = filename_convert(req,
3546 conn,
3547 req->flags2 & FLAGS2_DFS_PATHNAMES,
3548 new_base_name,
3549 0,
3550 NULL,
3551 smb_fname_out);
3552 if (!NT_STATUS_IS_OK(status)) {
3553 goto out;
3554 }
3555
3556 out:
3557 TALLOC_FREE(parent_fname);
3558 TALLOC_FREE(new_base_name);
3559 return status;
3560}
3561
3562NTSTATUS create_file_default(connection_struct *conn,
3563 struct smb_request *req,
3564 uint16_t root_dir_fid,
3565 struct smb_filename *smb_fname,
3566 uint32_t access_mask,
3567 uint32_t share_access,
3568 uint32_t create_disposition,
3569 uint32_t create_options,
3570 uint32_t file_attributes,
3571 uint32_t oplock_request,
3572 uint64_t allocation_size,
3573 uint32_t private_flags,
3574 struct security_descriptor *sd,
3575 struct ea_list *ea_list,
3576 files_struct **result,
3577 int *pinfo)
3578{
3579 int info = FILE_WAS_OPENED;
3580 files_struct *fsp = NULL;
3581 NTSTATUS status;
3582 bool stream_name = false;
3583
3584 DEBUG(10,("create_file: access_mask = 0x%x "
3585 "file_attributes = 0x%x, share_access = 0x%x, "
3586 "create_disposition = 0x%x create_options = 0x%x "
3587 "oplock_request = 0x%x "
3588 "private_flags = 0x%x "
3589 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3590 "fname = %s\n",
3591 (unsigned int)access_mask,
3592 (unsigned int)file_attributes,
3593 (unsigned int)share_access,
3594 (unsigned int)create_disposition,
3595 (unsigned int)create_options,
3596 (unsigned int)oplock_request,
3597 (unsigned int)private_flags,
3598 (unsigned int)root_dir_fid,
3599 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3600
3601 /*
3602 * Calculate the filename from the root_dir_if if necessary.
3603 */
3604
3605 if (root_dir_fid != 0) {
3606 struct smb_filename *smb_fname_out = NULL;
3607 status = get_relative_fid_filename(conn, req, root_dir_fid,
3608 smb_fname, &smb_fname_out);
3609 if (!NT_STATUS_IS_OK(status)) {
3610 goto fail;
3611 }
3612 smb_fname = smb_fname_out;
3613 }
3614
3615 /*
3616 * Check to see if this is a mac fork of some kind.
3617 */
3618
3619 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3620 if (stream_name) {
3621 enum FAKE_FILE_TYPE fake_file_type;
3622
3623 fake_file_type = is_fake_file(smb_fname);
3624
3625 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3626
3627 /*
3628 * Here we go! support for changing the disk quotas
3629 * --metze
3630 *
3631 * We need to fake up to open this MAGIC QUOTA file
3632 * and return a valid FID.
3633 *
3634 * w2k close this file directly after openening xp
3635 * also tries a QUERY_FILE_INFO on the file and then
3636 * close it
3637 */
3638 status = open_fake_file(req, conn, req->vuid,
3639 fake_file_type, smb_fname,
3640 access_mask, &fsp);
3641 if (!NT_STATUS_IS_OK(status)) {
3642 goto fail;
3643 }
3644
3645 ZERO_STRUCT(smb_fname->st);
3646 goto done;
3647 }
3648
3649 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3650 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3651 goto fail;
3652 }
3653 }
3654
3655 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3656 int ret;
3657 smb_fname->stream_name = NULL;
3658 /* We have to handle this error here. */
3659 if (create_options & FILE_DIRECTORY_FILE) {
3660 status = NT_STATUS_NOT_A_DIRECTORY;
3661 goto fail;
3662 }
3663 if (lp_posix_pathnames()) {
3664 ret = SMB_VFS_LSTAT(conn, smb_fname);
3665 } else {
3666 ret = SMB_VFS_STAT(conn, smb_fname);
3667 }
3668
3669 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3670 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3671 goto fail;
3672 }
3673 }
3674
3675 status = create_file_unixpath(
3676 conn, req, smb_fname, access_mask, share_access,
3677 create_disposition, create_options, file_attributes,
3678 oplock_request, allocation_size, private_flags,
3679 sd, ea_list,
3680 &fsp, &info);
3681
3682 if (!NT_STATUS_IS_OK(status)) {
3683 goto fail;
3684 }
3685
3686 done:
3687 DEBUG(10, ("create_file: info=%d\n", info));
3688
3689 *result = fsp;
3690 if (pinfo != NULL) {
3691 *pinfo = info;
3692 }
3693 return NT_STATUS_OK;
3694
3695 fail:
3696 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3697
3698 if (fsp != NULL) {
3699 close_file(req, fsp, ERROR_CLOSE);
3700 fsp = NULL;
3701 }
3702 return status;
3703}
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