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Fix error return to be NT_STATUS_NOT_A_DIRECTORY.
[Samba/id10ts.git] / source3 / smbd / open.c
bloba56dd6bfa1e8411eda1abc15d010062617dec857
1 /*
2 Unix SMB/CIFS implementation.
3 file opening and share modes
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2004
6 Copyright (C) Volker Lendecke 2005
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "system/filesys.h"
24 #include "printing.h"
25 #include "smbd/smbd.h"
26 #include "smbd/globals.h"
27 #include "fake_file.h"
28 #include "../libcli/security/security.h"
29 #include "../librpc/gen_ndr/ndr_security.h"
30 #include "auth.h"
31 #include "messages.h"
32
33 extern const struct generic_mapping file_generic_mapping;
34
35 struct deferred_open_record {
36 bool delayed_for_oplocks;
37 struct file_id id;
38 };
39
40 /****************************************************************************
41 SMB1 file varient of se_access_check. Never test FILE_READ_ATTRIBUTES.
42 ****************************************************************************/
43
44 NTSTATUS smb1_file_se_access_check(struct connection_struct *conn,
45 const struct security_descriptor *sd,
46 const struct security_token *token,
47 uint32_t access_desired,
48 uint32_t *access_granted)
49 {
50 *access_granted = 0;
51
52 if (get_current_uid(conn) == (uid_t)0) {
53 /* I'm sorry sir, I didn't know you were root... */
54 *access_granted = access_desired;
55 if (access_desired & SEC_FLAG_MAXIMUM_ALLOWED) {
56 *access_granted |= FILE_GENERIC_ALL;
57 }
58 return NT_STATUS_OK;
59 }
60
61 return se_access_check(sd,
62 token,
63 (access_desired & ~FILE_READ_ATTRIBUTES),
64 access_granted);
65 }
66
67 /****************************************************************************
68 Check if we have open rights.
69 ****************************************************************************/
70
71 NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
72 const struct smb_filename *smb_fname,
73 uint32_t access_mask,
74 uint32_t *access_granted)
75 {
76 /* Check if we have rights to open. */
77 NTSTATUS status;
78 struct security_descriptor *sd = NULL;
79 uint32_t rejected_share_access;
80
81 rejected_share_access = access_mask & ~(conn->share_access);
82
83 if (rejected_share_access) {
84 *access_granted = rejected_share_access;
85 return NT_STATUS_ACCESS_DENIED;
86 }
87
88 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
89 *access_granted = access_mask;
90
91 DEBUG(10,("smbd_check_open_rights: not checking ACL "
92 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
93 smb_fname_str_dbg(smb_fname),
94 (unsigned int)*access_granted ));
95 return NT_STATUS_OK;
96 }
97
98 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
99 (SECINFO_OWNER |
100 SECINFO_GROUP |
101 SECINFO_DACL),&sd);
102
103 if (!NT_STATUS_IS_OK(status)) {
104 DEBUG(10, ("smbd_check_open_rights: Could not get acl "
105 "on %s: %s\n",
106 smb_fname_str_dbg(smb_fname),
107 nt_errstr(status)));
108 return status;
109 }
110
111 status = smb1_file_se_access_check(conn,
112 sd,
113 get_current_nttok(conn),
114 access_mask,
115 access_granted);
116
117 DEBUG(10,("smbd_check_open_rights: file %s requesting "
118 "0x%x returning 0x%x (%s)\n",
119 smb_fname_str_dbg(smb_fname),
120 (unsigned int)access_mask,
121 (unsigned int)*access_granted,
122 nt_errstr(status) ));
123
124 if (!NT_STATUS_IS_OK(status)) {
125 if (DEBUGLEVEL >= 10) {
126 DEBUG(10,("smbd_check_open_rights: acl for %s is:\n",
127 smb_fname_str_dbg(smb_fname) ));
128 NDR_PRINT_DEBUG(security_descriptor, sd);
129 }
130 }
131
132 TALLOC_FREE(sd);
133
134 return status;
135 }
136
137 /****************************************************************************
138 fd support routines - attempt to do a dos_open.
139 ****************************************************************************/
140
141 static NTSTATUS fd_open(struct connection_struct *conn,
142 files_struct *fsp,
143 int flags,
144 mode_t mode)
145 {
146 struct smb_filename *smb_fname = fsp->fsp_name;
147 NTSTATUS status = NT_STATUS_OK;
148
149 #ifdef O_NOFOLLOW
150 /*
151 * Never follow symlinks on a POSIX client. The
152 * client should be doing this.
153 */
154
155 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
156 flags |= O_NOFOLLOW;
157 }
158 #endif
159
160 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
161 if (fsp->fh->fd == -1) {
162 status = map_nt_error_from_unix(errno);
163 if (errno == EMFILE) {
164 static time_t last_warned = 0L;
165
166 if (time((time_t *) NULL) > last_warned) {
167 DEBUG(0,("Too many open files, unable "
168 "to open more! smbd's max "
169 "open files = %d\n",
170 lp_max_open_files()));
171 last_warned = time((time_t *) NULL);
172 }
173 }
174
175 }
176
177 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
178 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
179 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
180
181 return status;
182 }
183
184 /****************************************************************************
185 Close the file associated with a fsp.
186 ****************************************************************************/
187
188 NTSTATUS fd_close(files_struct *fsp)
189 {
190 int ret;
191
192 if (fsp->dptr) {
193 dptr_CloseDir(fsp);
194 }
195 if (fsp->fh->fd == -1) {
196 return NT_STATUS_OK; /* What we used to call a stat open. */
197 }
198 if (fsp->fh->ref_count > 1) {
199 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
200 }
201
202 ret = SMB_VFS_CLOSE(fsp);
203 fsp->fh->fd = -1;
204 if (ret == -1) {
205 return map_nt_error_from_unix(errno);
206 }
207 return NT_STATUS_OK;
208 }
209
210 /****************************************************************************
211 Change the ownership of a file to that of the parent directory.
212 Do this by fd if possible.
213 ****************************************************************************/
214
215 void change_file_owner_to_parent(connection_struct *conn,
216 const char *inherit_from_dir,
217 files_struct *fsp)
218 {
219 struct smb_filename *smb_fname_parent = NULL;
220 NTSTATUS status;
221 int ret;
222
223 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
224 NULL, NULL, &smb_fname_parent);
225 if (!NT_STATUS_IS_OK(status)) {
226 return;
227 }
228
229 ret = SMB_VFS_STAT(conn, smb_fname_parent);
230 if (ret == -1) {
231 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
232 "directory %s. Error was %s\n",
233 smb_fname_str_dbg(smb_fname_parent),
234 strerror(errno)));
235 TALLOC_FREE(smb_fname_parent);
236 return;
237 }
238
239 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
240 /* Already this uid - no need to change. */
241 DEBUG(10,("change_file_owner_to_parent: file %s "
242 "is already owned by uid %d\n",
243 fsp_str_dbg(fsp),
244 (int)fsp->fsp_name->st.st_ex_uid ));
245 TALLOC_FREE(smb_fname_parent);
246 return;
247 }
248
249 become_root();
250 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
251 unbecome_root();
252 if (ret == -1) {
253 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
254 "file %s to parent directory uid %u. Error "
255 "was %s\n", fsp_str_dbg(fsp),
256 (unsigned int)smb_fname_parent->st.st_ex_uid,
257 strerror(errno) ));
258 } else {
259 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
260 "parent directory uid %u.\n", fsp_str_dbg(fsp),
261 (unsigned int)smb_fname_parent->st.st_ex_uid));
262 /* Ensure the uid entry is updated. */
263 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
264 }
265
266 TALLOC_FREE(smb_fname_parent);
267 }
268
269 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
270 const char *inherit_from_dir,
271 const char *fname,
272 SMB_STRUCT_STAT *psbuf)
273 {
274 struct smb_filename *smb_fname_parent = NULL;
275 struct smb_filename *smb_fname_cwd = NULL;
276 char *saved_dir = NULL;
277 TALLOC_CTX *ctx = talloc_tos();
278 NTSTATUS status = NT_STATUS_OK;
279 int ret;
280
281 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
282 &smb_fname_parent);
283 if (!NT_STATUS_IS_OK(status)) {
284 return status;
285 }
286
287 ret = SMB_VFS_STAT(conn, smb_fname_parent);
288 if (ret == -1) {
289 status = map_nt_error_from_unix(errno);
290 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
291 "directory %s. Error was %s\n",
292 smb_fname_str_dbg(smb_fname_parent),
293 strerror(errno)));
294 goto out;
295 }
296
297 /* We've already done an lstat into psbuf, and we know it's a
298 directory. If we can cd into the directory and the dev/ino
299 are the same then we can safely chown without races as
300 we're locking the directory in place by being in it. This
301 should work on any UNIX (thanks tridge :-). JRA.
302 */
303
304 saved_dir = vfs_GetWd(ctx,conn);
305 if (!saved_dir) {
306 status = map_nt_error_from_unix(errno);
307 DEBUG(0,("change_dir_owner_to_parent: failed to get "
308 "current working directory. Error was %s\n",
309 strerror(errno)));
310 goto out;
311 }
312
313 /* Chdir into the new path. */
314 if (vfs_ChDir(conn, fname) == -1) {
315 status = map_nt_error_from_unix(errno);
316 DEBUG(0,("change_dir_owner_to_parent: failed to change "
317 "current working directory to %s. Error "
318 "was %s\n", fname, strerror(errno) ));
319 goto chdir;
320 }
321
322 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
323 &smb_fname_cwd);
324 if (!NT_STATUS_IS_OK(status)) {
325 return status;
326 }
327
328 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
329 if (ret == -1) {
330 status = map_nt_error_from_unix(errno);
331 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
332 "directory '.' (%s) Error was %s\n",
333 fname, strerror(errno)));
334 goto chdir;
335 }
336
337 /* Ensure we're pointing at the same place. */
338 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
339 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
340 DEBUG(0,("change_dir_owner_to_parent: "
341 "device/inode on directory %s changed. "
342 "Refusing to chown !\n", fname ));
343 status = NT_STATUS_ACCESS_DENIED;
344 goto chdir;
345 }
346
347 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
348 /* Already this uid - no need to change. */
349 DEBUG(10,("change_dir_owner_to_parent: directory %s "
350 "is already owned by uid %d\n",
351 fname,
352 (int)smb_fname_cwd->st.st_ex_uid ));
353 status = NT_STATUS_OK;
354 goto chdir;
355 }
356
357 become_root();
358 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
359 (gid_t)-1);
360 unbecome_root();
361 if (ret == -1) {
362 status = map_nt_error_from_unix(errno);
363 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
364 "directory %s to parent directory uid %u. "
365 "Error was %s\n", fname,
366 (unsigned int)smb_fname_parent->st.st_ex_uid,
367 strerror(errno) ));
368 } else {
369 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
370 "directory %s to parent directory uid %u.\n",
371 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
372 /* Ensure the uid entry is updated. */
373 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
374 }
375
376 chdir:
377 vfs_ChDir(conn,saved_dir);
378 out:
379 TALLOC_FREE(smb_fname_parent);
380 TALLOC_FREE(smb_fname_cwd);
381 return status;
382 }
383
384 /****************************************************************************
385 Open a file.
386 ****************************************************************************/
387
388 static NTSTATUS open_file(files_struct *fsp,
389 connection_struct *conn,
390 struct smb_request *req,
391 const char *parent_dir,
392 int flags,
393 mode_t unx_mode,
394 uint32 access_mask, /* client requested access mask. */
395 uint32 open_access_mask) /* what we're actually using in the open. */
396 {
397 struct smb_filename *smb_fname = fsp->fsp_name;
398 NTSTATUS status = NT_STATUS_OK;
399 int accmode = (flags & O_ACCMODE);
400 int local_flags = flags;
401 bool file_existed = VALID_STAT(fsp->fsp_name->st);
402 bool file_created = false;
403
404 fsp->fh->fd = -1;
405 errno = EPERM;
406
407 /* Check permissions */
408
409 /*
410 * This code was changed after seeing a client open request
411 * containing the open mode of (DENY_WRITE/read-only) with
412 * the 'create if not exist' bit set. The previous code
413 * would fail to open the file read only on a read-only share
414 * as it was checking the flags parameter directly against O_RDONLY,
415 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
416 * JRA.
417 */
418
419 if (!CAN_WRITE(conn)) {
420 /* It's a read-only share - fail if we wanted to write. */
421 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
422 DEBUG(3,("Permission denied opening %s\n",
423 smb_fname_str_dbg(smb_fname)));
424 return NT_STATUS_ACCESS_DENIED;
425 } else if(flags & O_CREAT) {
426 /* We don't want to write - but we must make sure that
427 O_CREAT doesn't create the file if we have write
428 access into the directory.
429 */
430 flags &= ~(O_CREAT|O_EXCL);
431 local_flags &= ~(O_CREAT|O_EXCL);
432 }
433 }
434
435 /*
436 * This little piece of insanity is inspired by the
437 * fact that an NT client can open a file for O_RDONLY,
438 * but set the create disposition to FILE_EXISTS_TRUNCATE.
439 * If the client *can* write to the file, then it expects to
440 * truncate the file, even though it is opening for readonly.
441 * Quicken uses this stupid trick in backup file creation...
442 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
443 * for helping track this one down. It didn't bite us in 2.0.x
444 * as we always opened files read-write in that release. JRA.
445 */
446
447 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
448 DEBUG(10,("open_file: truncate requested on read-only open "
449 "for file %s\n", smb_fname_str_dbg(smb_fname)));
450 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
451 }
452
453 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
454 (!file_existed && (local_flags & O_CREAT)) ||
455 ((local_flags & O_TRUNC) == O_TRUNC) ) {
456 const char *wild;
457
458 /*
459 * We can't actually truncate here as the file may be locked.
460 * open_file_ntcreate will take care of the truncate later. JRA.
461 */
462
463 local_flags &= ~O_TRUNC;
464
465 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
466 /*
467 * We would block on opening a FIFO with no one else on the
468 * other end. Do what we used to do and add O_NONBLOCK to the
469 * open flags. JRA.
470 */
471
472 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
473 local_flags |= O_NONBLOCK;
474 }
475 #endif
476
477 /* Don't create files with Microsoft wildcard characters. */
478 if (fsp->base_fsp) {
479 /*
480 * wildcard characters are allowed in stream names
481 * only test the basefilename
482 */
483 wild = fsp->base_fsp->fsp_name->base_name;
484 } else {
485 wild = smb_fname->base_name;
486 }
487 if ((local_flags & O_CREAT) && !file_existed &&
488 ms_has_wild(wild)) {
489 return NT_STATUS_OBJECT_NAME_INVALID;
490 }
491
492 /* Actually do the open */
493 status = fd_open(conn, fsp, local_flags, unx_mode);
494 if (!NT_STATUS_IS_OK(status)) {
495 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
496 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
497 nt_errstr(status),local_flags,flags));
498 return status;
499 }
500
501 if ((local_flags & O_CREAT) && !file_existed) {
502 file_created = true;
503 }
504
505 } else {
506 fsp->fh->fd = -1; /* What we used to call a stat open. */
507 if (file_existed) {
508 uint32_t access_granted = 0;
509
510 status = smbd_check_open_rights(conn,
511 smb_fname,
512 access_mask,
513 &access_granted);
514 if (!NT_STATUS_IS_OK(status)) {
515 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
516 /*
517 * On NT_STATUS_ACCESS_DENIED, access_granted
518 * contains the denied bits.
519 */
520
521 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
522 (access_granted & FILE_WRITE_ATTRIBUTES) &&
523 (lp_map_readonly(SNUM(conn)) ||
524 lp_map_archive(SNUM(conn)) ||
525 lp_map_hidden(SNUM(conn)) ||
526 lp_map_system(SNUM(conn)))) {
527 access_granted &= ~FILE_WRITE_ATTRIBUTES;
528
529 DEBUG(10,("open_file: "
530 "overrode "
531 "FILE_WRITE_"
532 "ATTRIBUTES "
533 "on file %s\n",
534 smb_fname_str_dbg(
535 smb_fname)));
536 }
537
538 if ((access_mask & DELETE_ACCESS) &&
539 (access_granted & DELETE_ACCESS) &&
540 can_delete_file_in_directory(conn,
541 smb_fname)) {
542 /* Were we trying to do a stat open
543 * for delete and didn't get DELETE
544 * access (only) ? Check if the
545 * directory allows DELETE_CHILD.
546 * See here:
547 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
548 * for details. */
549
550 access_granted &= ~DELETE_ACCESS;
551
552 DEBUG(10,("open_file: "
553 "overrode "
554 "DELETE_ACCESS on "
555 "file %s\n",
556 smb_fname_str_dbg(
557 smb_fname)));
558 }
559
560 if (access_granted != 0) {
561 DEBUG(10,("open_file: Access "
562 "denied on file "
563 "%s\n",
564 smb_fname_str_dbg(
565 smb_fname)));
566 return status;
567 }
568 } else if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
569 fsp->posix_open &&
570 S_ISLNK(smb_fname->st.st_ex_mode)) {
571 /* This is a POSIX stat open for delete
572 * or rename on a symlink that points
573 * nowhere. Allow. */
574 DEBUG(10,("open_file: allowing POSIX "
575 "open on bad symlink %s\n",
576 smb_fname_str_dbg(
577 smb_fname)));
578 } else {
579 DEBUG(10,("open_file: "
580 "smbd_check_open_rights on file "
581 "%s returned %s\n",
582 smb_fname_str_dbg(smb_fname),
583 nt_errstr(status) ));
584 return status;
585 }
586 }
587 }
588 }
589
590 if (!file_existed) {
591 int ret;
592
593 if (fsp->fh->fd == -1) {
594 ret = SMB_VFS_STAT(conn, smb_fname);
595 } else {
596 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
597 /* If we have an fd, this stat should succeed. */
598 if (ret == -1) {
599 DEBUG(0,("Error doing fstat on open file %s "
600 "(%s)\n",
601 smb_fname_str_dbg(smb_fname),
602 strerror(errno) ));
603 }
604 }
605
606 /* For a non-io open, this stat failing means file not found. JRA */
607 if (ret == -1) {
608 status = map_nt_error_from_unix(errno);
609 fd_close(fsp);
610 return status;
611 }
612
613 if (file_created) {
614 bool need_re_stat = false;
615 /* Do all inheritance work after we've
616 done a successful stat call and filled
617 in the stat struct in fsp->fsp_name. */
618
619 /* Inherit the ACL if required */
620 if (lp_inherit_perms(SNUM(conn))) {
621 inherit_access_posix_acl(conn, parent_dir,
622 smb_fname->base_name,
623 unx_mode);
624 need_re_stat = true;
625 }
626
627 /* Change the owner if required. */
628 if (lp_inherit_owner(SNUM(conn))) {
629 change_file_owner_to_parent(conn, parent_dir,
630 fsp);
631 need_re_stat = true;
632 }
633
634 if (need_re_stat) {
635 if (fsp->fh->fd == -1) {
636 ret = SMB_VFS_STAT(conn, smb_fname);
637 } else {
638 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
639 /* If we have an fd, this stat should succeed. */
640 if (ret == -1) {
641 DEBUG(0,("Error doing fstat on open file %s "
642 "(%s)\n",
643 smb_fname_str_dbg(smb_fname),
644 strerror(errno) ));
645 }
646 }
647 }
648
649 notify_fname(conn, NOTIFY_ACTION_ADDED,
650 FILE_NOTIFY_CHANGE_FILE_NAME,
651 smb_fname->base_name);
652 }
653 }
654
655 /*
656 * POSIX allows read-only opens of directories. We don't
657 * want to do this (we use a different code path for this)
658 * so catch a directory open and return an EISDIR. JRA.
659 */
660
661 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
662 fd_close(fsp);
663 errno = EISDIR;
664 return NT_STATUS_FILE_IS_A_DIRECTORY;
665 }
666
667 fsp->mode = smb_fname->st.st_ex_mode;
668 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
669 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
670 fsp->file_pid = req ? req->smbpid : 0;
671 fsp->can_lock = True;
672 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
673 if (!CAN_WRITE(conn)) {
674 fsp->can_write = False;
675 } else {
676 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
677 True : False;
678 }
679 fsp->print_file = NULL;
680 fsp->modified = False;
681 fsp->sent_oplock_break = NO_BREAK_SENT;
682 fsp->is_directory = False;
683 if (conn->aio_write_behind_list &&
684 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
685 conn->case_sensitive)) {
686 fsp->aio_write_behind = True;
687 }
688
689 fsp->wcp = NULL; /* Write cache pointer. */
690
691 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
692 conn->session_info->unix_info->unix_name,
693 smb_fname_str_dbg(smb_fname),
694 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
695 conn->num_files_open));
696
697 errno = 0;
698 return NT_STATUS_OK;
699 }
700
701 /****************************************************************************
702 Check if we can open a file with a share mode.
703 Returns True if conflict, False if not.
704 ****************************************************************************/
705
706 static bool share_conflict(struct share_mode_entry *entry,
707 uint32 access_mask,
708 uint32 share_access)
709 {
710 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
711 "entry->share_access = 0x%x, "
712 "entry->private_options = 0x%x\n",
713 (unsigned int)entry->access_mask,
714 (unsigned int)entry->share_access,
715 (unsigned int)entry->private_options));
716
717 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
718 (unsigned int)access_mask, (unsigned int)share_access));
719
720 if ((entry->access_mask & (FILE_WRITE_DATA|
721 FILE_APPEND_DATA|
722 FILE_READ_DATA|
723 FILE_EXECUTE|
724 DELETE_ACCESS)) == 0) {
725 DEBUG(10,("share_conflict: No conflict due to "
726 "entry->access_mask = 0x%x\n",
727 (unsigned int)entry->access_mask ));
728 return False;
729 }
730
731 if ((access_mask & (FILE_WRITE_DATA|
732 FILE_APPEND_DATA|
733 FILE_READ_DATA|
734 FILE_EXECUTE|
735 DELETE_ACCESS)) == 0) {
736 DEBUG(10,("share_conflict: No conflict due to "
737 "access_mask = 0x%x\n",
738 (unsigned int)access_mask ));
739 return False;
740 }
741
742 #if 1 /* JRA TEST - Superdebug. */
743 #define CHECK_MASK(num, am, right, sa, share) \
744 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
745 (unsigned int)(num), (unsigned int)(am), \
746 (unsigned int)(right), (unsigned int)(am)&(right) )); \
747 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
748 (unsigned int)(num), (unsigned int)(sa), \
749 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
750 if (((am) & (right)) && !((sa) & (share))) { \
751 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
752 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
753 (unsigned int)(share) )); \
754 return True; \
755 }
756 #else
757 #define CHECK_MASK(num, am, right, sa, share) \
758 if (((am) & (right)) && !((sa) & (share))) { \
759 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
760 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
761 (unsigned int)(share) )); \
762 return True; \
763 }
764 #endif
765
766 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
767 share_access, FILE_SHARE_WRITE);
768 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
769 entry->share_access, FILE_SHARE_WRITE);
770
771 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
772 share_access, FILE_SHARE_READ);
773 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
774 entry->share_access, FILE_SHARE_READ);
775
776 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
777 share_access, FILE_SHARE_DELETE);
778 CHECK_MASK(6, access_mask, DELETE_ACCESS,
779 entry->share_access, FILE_SHARE_DELETE);
780
781 DEBUG(10,("share_conflict: No conflict.\n"));
782 return False;
783 }
784
785 #if defined(DEVELOPER)
786 static void validate_my_share_entries(struct smbd_server_connection *sconn,
787 int num,
788 struct share_mode_entry *share_entry)
789 {
790 files_struct *fsp;
791
792 if (!procid_is_me(&share_entry->pid)) {
793 return;
794 }
795
796 if (is_deferred_open_entry(share_entry) &&
797 !open_was_deferred(sconn, share_entry->op_mid)) {
798 char *str = talloc_asprintf(talloc_tos(),
799 "Got a deferred entry without a request: "
800 "PANIC: %s\n",
801 share_mode_str(talloc_tos(), num, share_entry));
802 smb_panic(str);
803 }
804
805 if (!is_valid_share_mode_entry(share_entry)) {
806 return;
807 }
808
809 fsp = file_find_dif(sconn, share_entry->id,
810 share_entry->share_file_id);
811 if (!fsp) {
812 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
813 share_mode_str(talloc_tos(), num, share_entry) ));
814 smb_panic("validate_my_share_entries: Cannot match a "
815 "share entry with an open file\n");
816 }
817
818 if (is_deferred_open_entry(share_entry) ||
819 is_unused_share_mode_entry(share_entry)) {
820 goto panic;
821 }
822
823 if ((share_entry->op_type == NO_OPLOCK) &&
824 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
825 /* Someone has already written to it, but I haven't yet
826 * noticed */
827 return;
828 }
829
830 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
831 goto panic;
832 }
833
834 return;
835
836 panic:
837 {
838 char *str;
839 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
840 share_mode_str(talloc_tos(), num, share_entry) ));
841 str = talloc_asprintf(talloc_tos(),
842 "validate_my_share_entries: "
843 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
844 fsp->fsp_name->base_name,
845 (unsigned int)fsp->oplock_type,
846 (unsigned int)share_entry->op_type );
847 smb_panic(str);
848 }
849 }
850 #endif
851
852 bool is_stat_open(uint32 access_mask)
853 {
854 return (access_mask &&
855 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
856 FILE_WRITE_ATTRIBUTES))==0) &&
857 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
858 FILE_WRITE_ATTRIBUTES)) != 0));
859 }
860
861 /****************************************************************************
862 Deal with share modes
863 Invarient: Share mode must be locked on entry and exit.
864 Returns -1 on error, or number of share modes on success (may be zero).
865 ****************************************************************************/
866
867 static NTSTATUS open_mode_check(connection_struct *conn,
868 struct share_mode_lock *lck,
869 uint32_t name_hash,
870 uint32 access_mask,
871 uint32 share_access,
872 uint32 create_options,
873 bool *file_existed)
874 {
875 int i;
876
877 if(lck->num_share_modes == 0) {
878 return NT_STATUS_OK;
879 }
880
881 *file_existed = True;
882
883 /* A delete on close prohibits everything */
884
885 if (is_delete_on_close_set(lck, name_hash)) {
886 return NT_STATUS_DELETE_PENDING;
887 }
888
889 if (is_stat_open(access_mask)) {
890 /* Stat open that doesn't trigger oplock breaks or share mode
891 * checks... ! JRA. */
892 return NT_STATUS_OK;
893 }
894
895 /*
896 * Check if the share modes will give us access.
897 */
898
899 #if defined(DEVELOPER)
900 for(i = 0; i < lck->num_share_modes; i++) {
901 validate_my_share_entries(conn->sconn, i,
902 &lck->share_modes[i]);
903 }
904 #endif
905
906 if (!lp_share_modes(SNUM(conn))) {
907 return NT_STATUS_OK;
908 }
909
910 /* Now we check the share modes, after any oplock breaks. */
911 for(i = 0; i < lck->num_share_modes; i++) {
912
913 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
914 continue;
915 }
916
917 /* someone else has a share lock on it, check to see if we can
918 * too */
919 if (share_conflict(&lck->share_modes[i],
920 access_mask, share_access)) {
921 return NT_STATUS_SHARING_VIOLATION;
922 }
923 }
924
925 return NT_STATUS_OK;
926 }
927
928 static bool is_delete_request(files_struct *fsp) {
929 return ((fsp->access_mask == DELETE_ACCESS) &&
930 (fsp->oplock_type == NO_OPLOCK));
931 }
932
933 /*
934 * Send a break message to the oplock holder and delay the open for
935 * our client.
936 */
937
938 static NTSTATUS send_break_message(files_struct *fsp,
939 struct share_mode_entry *exclusive,
940 uint64_t mid,
941 int oplock_request)
942 {
943 NTSTATUS status;
944 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
945
946 DEBUG(10, ("Sending break request to PID %s\n",
947 procid_str_static(&exclusive->pid)));
948 exclusive->op_mid = mid;
949
950 /* Create the message. */
951 share_mode_entry_to_message(msg, exclusive);
952
953 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
954 don't want this set in the share mode struct pointed to by lck. */
955
956 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
957 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
958 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
959 }
960
961 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
962 MSG_SMB_BREAK_REQUEST,
963 (uint8 *)msg,
964 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
965 if (!NT_STATUS_IS_OK(status)) {
966 DEBUG(3, ("Could not send oplock break message: %s\n",
967 nt_errstr(status)));
968 }
969
970 return status;
971 }
972
973 /*
974 * Return share_mode_entry pointers for :
975 * 1). Batch oplock entry.
976 * 2). Batch or exclusive oplock entry (may be identical to #1).
977 * bool have_level2_oplock
978 * bool have_no_oplock.
979 * Do internal consistency checks on the share mode for a file.
980 */
981
982 static void find_oplock_types(files_struct *fsp,
983 int oplock_request,
984 struct share_mode_lock *lck,
985 struct share_mode_entry **pp_batch,
986 struct share_mode_entry **pp_ex_or_batch,
987 bool *got_level2,
988 bool *got_no_oplock)
989 {
990 int i;
991
992 *pp_batch = NULL;
993 *pp_ex_or_batch = NULL;
994 *got_level2 = false;
995 *got_no_oplock = false;
996
997 /* Ignore stat or internal opens, as is done in
998 delay_for_batch_oplocks() and
999 delay_for_exclusive_oplocks().
1000 */
1001 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1002 return;
1003 }
1004
1005 for (i=0; i<lck->num_share_modes; i++) {
1006 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1007 continue;
1008 }
1009
1010 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1011 is_stat_open(lck->share_modes[i].access_mask)) {
1012 /* We ignore stat opens in the table - they
1013 always have NO_OPLOCK and never get or
1014 cause breaks. JRA. */
1015 continue;
1016 }
1017
1018 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1019 /* batch - can only be one. */
1020 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1021 smb_panic("Bad batch oplock entry.");
1022 }
1023 *pp_batch = &lck->share_modes[i];
1024 }
1025
1026 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1027 /* Exclusive or batch - can only be one. */
1028 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1029 smb_panic("Bad exclusive or batch oplock entry.");
1030 }
1031 *pp_ex_or_batch = &lck->share_modes[i];
1032 }
1033
1034 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1035 if (*pp_batch || *pp_ex_or_batch) {
1036 smb_panic("Bad levelII oplock entry.");
1037 }
1038 *got_level2 = true;
1039 }
1040
1041 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1042 if (*pp_batch || *pp_ex_or_batch) {
1043 smb_panic("Bad no oplock entry.");
1044 }
1045 *got_no_oplock = true;
1046 }
1047 }
1048 }
1049
1050 static bool delay_for_batch_oplocks(files_struct *fsp,
1051 uint64_t mid,
1052 int oplock_request,
1053 struct share_mode_entry *batch_entry)
1054 {
1055 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1056 return false;
1057 }
1058
1059 if (batch_entry != NULL) {
1060 /* Found a batch oplock */
1061 send_break_message(fsp, batch_entry, mid, oplock_request);
1062 return true;
1063 }
1064 return false;
1065 }
1066
1067 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1068 uint64_t mid,
1069 int oplock_request,
1070 struct share_mode_entry *ex_entry)
1071 {
1072 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1073 return false;
1074 }
1075
1076 if (ex_entry != NULL) {
1077 /* Found an exclusive or batch oplock */
1078 bool delay_it = is_delete_request(fsp) ?
1079 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1080 if (delay_it) {
1081 send_break_message(fsp, ex_entry, mid, oplock_request);
1082 return true;
1083 }
1084 }
1085 return false;
1086 }
1087
1088 static void grant_fsp_oplock_type(files_struct *fsp,
1089 const struct byte_range_lock *br_lck,
1090 int oplock_request,
1091 bool got_level2_oplock,
1092 bool got_a_none_oplock)
1093 {
1094 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1095 lp_level2_oplocks(SNUM(fsp->conn));
1096
1097 /* Start by granting what the client asked for,
1098 but ensure no SAMBA_PRIVATE bits can be set. */
1099 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1100
1101 if (oplock_request & INTERNAL_OPEN_ONLY) {
1102 /* No oplocks on internal open. */
1103 fsp->oplock_type = NO_OPLOCK;
1104 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1105 fsp->oplock_type, fsp_str_dbg(fsp)));
1106 return;
1107 } else if (br_lck && br_lck->num_locks > 0) {
1108 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1109 fsp_str_dbg(fsp)));
1110 fsp->oplock_type = NO_OPLOCK;
1111 }
1112
1113 if (is_stat_open(fsp->access_mask)) {
1114 /* Leave the value already set. */
1115 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1116 fsp->oplock_type, fsp_str_dbg(fsp)));
1117 return;
1118 }
1119
1120 /*
1121 * Match what was requested (fsp->oplock_type) with
1122 * what was found in the existing share modes.
1123 */
1124
1125 if (got_a_none_oplock) {
1126 fsp->oplock_type = NO_OPLOCK;
1127 } else if (got_level2_oplock) {
1128 if (fsp->oplock_type == NO_OPLOCK ||
1129 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1130 /* Store a level2 oplock, but don't tell the client */
1131 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1132 } else {
1133 fsp->oplock_type = LEVEL_II_OPLOCK;
1134 }
1135 } else {
1136 /* All share_mode_entries are placeholders or deferred.
1137 * Silently upgrade to fake levelII if the client didn't
1138 * ask for an oplock. */
1139 if (fsp->oplock_type == NO_OPLOCK) {
1140 /* Store a level2 oplock, but don't tell the client */
1141 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1142 }
1143 }
1144
1145 /*
1146 * Don't grant level2 to clients that don't want them
1147 * or if we've turned them off.
1148 */
1149 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1150 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1151 }
1152
1153 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1154 fsp->oplock_type, fsp_str_dbg(fsp)));
1155 }
1156
1157 bool request_timed_out(struct timeval request_time,
1158 struct timeval timeout)
1159 {
1160 struct timeval now, end_time;
1161 GetTimeOfDay(&now);
1162 end_time = timeval_sum(&request_time, &timeout);
1163 return (timeval_compare(&end_time, &now) < 0);
1164 }
1165
1166 /****************************************************************************
1167 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1168 ****************************************************************************/
1169
1170 static void defer_open(struct share_mode_lock *lck,
1171 struct timeval request_time,
1172 struct timeval timeout,
1173 struct smb_request *req,
1174 struct deferred_open_record *state)
1175 {
1176 int i;
1177
1178 /* Paranoia check */
1179
1180 for (i=0; i<lck->num_share_modes; i++) {
1181 struct share_mode_entry *e = &lck->share_modes[i];
1182
1183 if (!is_deferred_open_entry(e)) {
1184 continue;
1185 }
1186
1187 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1188 DEBUG(0, ("Trying to defer an already deferred "
1189 "request: mid=%llu, exiting\n",
1190 (unsigned long long)req->mid));
1191 exit_server("attempt to defer a deferred request");
1192 }
1193 }
1194
1195 /* End paranoia check */
1196
1197 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1198 "open entry for mid %llu\n",
1199 (unsigned int)request_time.tv_sec,
1200 (unsigned int)request_time.tv_usec,
1201 (unsigned long long)req->mid));
1202
1203 if (!push_deferred_open_message_smb(req, request_time, timeout,
1204 state->id, (char *)state, sizeof(*state))) {
1205 exit_server("push_deferred_open_message_smb failed");
1206 }
1207 add_deferred_open(lck, req->mid, request_time,
1208 sconn_server_id(req->sconn), state->id);
1209 }
1210
1211
1212 /****************************************************************************
1213 On overwrite open ensure that the attributes match.
1214 ****************************************************************************/
1215
1216 bool open_match_attributes(connection_struct *conn,
1217 uint32 old_dos_attr,
1218 uint32 new_dos_attr,
1219 mode_t existing_unx_mode,
1220 mode_t new_unx_mode,
1221 mode_t *returned_unx_mode)
1222 {
1223 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1224
1225 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1226 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1227
1228 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1229 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1230 *returned_unx_mode = new_unx_mode;
1231 } else {
1232 *returned_unx_mode = (mode_t)0;
1233 }
1234
1235 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1236 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1237 "returned_unx_mode = 0%o\n",
1238 (unsigned int)old_dos_attr,
1239 (unsigned int)existing_unx_mode,
1240 (unsigned int)new_dos_attr,
1241 (unsigned int)*returned_unx_mode ));
1242
1243 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1244 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1245 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1246 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1247 return False;
1248 }
1249 }
1250 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1251 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1252 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1253 return False;
1254 }
1255 }
1256 return True;
1257 }
1258
1259 /****************************************************************************
1260 Special FCB or DOS processing in the case of a sharing violation.
1261 Try and find a duplicated file handle.
1262 ****************************************************************************/
1263
1264 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1265 connection_struct *conn,
1266 files_struct *fsp_to_dup_into,
1267 const struct smb_filename *smb_fname,
1268 struct file_id id,
1269 uint16 file_pid,
1270 uint16 vuid,
1271 uint32 access_mask,
1272 uint32 share_access,
1273 uint32 create_options)
1274 {
1275 files_struct *fsp;
1276
1277 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1278 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1279
1280 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1281 fsp = file_find_di_next(fsp)) {
1282
1283 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1284 "vuid = %u, file_pid = %u, private_options = 0x%x "
1285 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1286 fsp->fh->fd, (unsigned int)fsp->vuid,
1287 (unsigned int)fsp->file_pid,
1288 (unsigned int)fsp->fh->private_options,
1289 (unsigned int)fsp->access_mask ));
1290
1291 if (fsp->fh->fd != -1 &&
1292 fsp->vuid == vuid &&
1293 fsp->file_pid == file_pid &&
1294 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1295 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1296 (fsp->access_mask & FILE_WRITE_DATA) &&
1297 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1298 strequal(fsp->fsp_name->stream_name,
1299 smb_fname->stream_name)) {
1300 DEBUG(10,("fcb_or_dos_open: file match\n"));
1301 break;
1302 }
1303 }
1304
1305 if (!fsp) {
1306 return NT_STATUS_NOT_FOUND;
1307 }
1308
1309 /* quite an insane set of semantics ... */
1310 if (is_executable(smb_fname->base_name) &&
1311 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1312 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1313 return NT_STATUS_INVALID_PARAMETER;
1314 }
1315
1316 /* We need to duplicate this fsp. */
1317 return dup_file_fsp(req, fsp, access_mask, share_access,
1318 create_options, fsp_to_dup_into);
1319 }
1320
1321 static void schedule_defer_open(struct share_mode_lock *lck,
1322 struct timeval request_time,
1323 struct smb_request *req)
1324 {
1325 struct deferred_open_record state;
1326
1327 /* This is a relative time, added to the absolute
1328 request_time value to get the absolute timeout time.
1329 Note that if this is the second or greater time we enter
1330 this codepath for this particular request mid then
1331 request_time is left as the absolute time of the *first*
1332 time this request mid was processed. This is what allows
1333 the request to eventually time out. */
1334
1335 struct timeval timeout;
1336
1337 /* Normally the smbd we asked should respond within
1338 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1339 * the client did, give twice the timeout as a safety
1340 * measure here in case the other smbd is stuck
1341 * somewhere else. */
1342
1343 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1344
1345 /* Nothing actually uses state.delayed_for_oplocks
1346 but it's handy to differentiate in debug messages
1347 between a 30 second delay due to oplock break, and
1348 a 1 second delay for share mode conflicts. */
1349
1350 state.delayed_for_oplocks = True;
1351 state.id = lck->id;
1352
1353 if (!request_timed_out(request_time, timeout)) {
1354 defer_open(lck, request_time, timeout, req, &state);
1355 }
1356 }
1357
1358 /****************************************************************************
1359 Work out what access_mask to use from what the client sent us.
1360 ****************************************************************************/
1361
1362 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1363 const struct smb_filename *smb_fname,
1364 bool file_existed,
1365 uint32_t access_mask,
1366 uint32_t *access_mask_out)
1367 {
1368 NTSTATUS status;
1369 uint32_t orig_access_mask = access_mask;
1370 uint32_t rejected_share_access;
1371
1372 /*
1373 * Convert GENERIC bits to specific bits.
1374 */
1375
1376 se_map_generic(&access_mask, &file_generic_mapping);
1377
1378 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1379 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1380 if (file_existed) {
1381
1382 struct security_descriptor *sd;
1383 uint32_t access_granted = 0;
1384
1385 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1386 (SECINFO_OWNER |
1387 SECINFO_GROUP |
1388 SECINFO_DACL),&sd);
1389
1390 if (!NT_STATUS_IS_OK(status)) {
1391 DEBUG(10,("smbd_calculate_access_mask: "
1392 "Could not get acl on file %s: %s\n",
1393 smb_fname_str_dbg(smb_fname),
1394 nt_errstr(status)));
1395 return NT_STATUS_ACCESS_DENIED;
1396 }
1397
1398 status = smb1_file_se_access_check(conn,
1399 sd,
1400 get_current_nttok(conn),
1401 access_mask,
1402 &access_granted);
1403
1404 TALLOC_FREE(sd);
1405
1406 if (!NT_STATUS_IS_OK(status)) {
1407 DEBUG(10, ("smbd_calculate_access_mask: "
1408 "Access denied on file %s: "
1409 "when calculating maximum access\n",
1410 smb_fname_str_dbg(smb_fname)));
1411 return NT_STATUS_ACCESS_DENIED;
1412 }
1413
1414 access_mask = access_granted;
1415 } else {
1416 access_mask = FILE_GENERIC_ALL;
1417 }
1418
1419 access_mask &= conn->share_access;
1420 }
1421
1422 rejected_share_access = access_mask & ~(conn->share_access);
1423
1424 if (rejected_share_access) {
1425 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1426 "file %s: rejected by share access mask[0x%08X] "
1427 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1428 smb_fname_str_dbg(smb_fname),
1429 conn->share_access,
1430 orig_access_mask, access_mask,
1431 rejected_share_access));
1432 return NT_STATUS_ACCESS_DENIED;
1433 }
1434
1435 *access_mask_out = access_mask;
1436 return NT_STATUS_OK;
1437 }
1438
1439 /****************************************************************************
1440 Remove the deferred open entry under lock.
1441 ****************************************************************************/
1442
1443 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1444 struct server_id pid)
1445 {
1446 struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1447 NULL, NULL, NULL);
1448 if (lck == NULL) {
1449 DEBUG(0, ("could not get share mode lock\n"));
1450 } else {
1451 del_deferred_open_entry(lck, mid, pid);
1452 TALLOC_FREE(lck);
1453 }
1454 }
1455
1456 /****************************************************************
1457 Ensure we get the brlock lock followed by the share mode lock
1458 in the correct order to prevent deadlocks if other smbd's are
1459 using the brlock database on this file simultaneously with this open
1460 (that code also gets the locks in brlock -> share mode lock order).
1461 ****************************************************************/
1462
1463 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1464 files_struct *fsp,
1465 const struct file_id id,
1466 const char *connectpath,
1467 const struct smb_filename *smb_fname,
1468 const struct timespec *p_old_write_time,
1469 struct share_mode_lock **p_lck,
1470 struct byte_range_lock **p_br_lck)
1471 {
1472 /* Ordering - we must get the br_lck for this
1473 file before the share mode. */
1474 if (lp_locking(fsp->conn->params)) {
1475 *p_br_lck = brl_get_locks_readonly(fsp);
1476 if (*p_br_lck == NULL) {
1477 DEBUG(0, ("Could not get br_lock\n"));
1478 return false;
1479 }
1480 /* Note - we don't need to free the returned
1481 br_lck explicitly as it was allocated on talloc_tos()
1482 and so will be autofreed (and release the lock)
1483 once the frame context disappears.
1484
1485 If it was set to fsp->brlock_rec then it was
1486 talloc_move'd to hang off the fsp pointer and
1487 in this case is guarenteed to not be holding the
1488 lock on the brlock database. */
1489 }
1490
1491 *p_lck = get_share_mode_lock(mem_ctx,
1492 id,
1493 connectpath,
1494 smb_fname,
1495 p_old_write_time);
1496
1497 if (*p_lck == NULL) {
1498 DEBUG(0, ("Could not get share mode lock\n"));
1499 TALLOC_FREE(*p_br_lck);
1500 return false;
1501 }
1502 return true;
1503 }
1504
1505 /****************************************************************************
1506 Open a file with a share mode. Passed in an already created files_struct *.
1507 ****************************************************************************/
1508
1509 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1510 struct smb_request *req,
1511 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1512 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1513 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1514 uint32 create_options, /* options such as delete on close. */
1515 uint32 new_dos_attributes, /* attributes used for new file. */
1516 int oplock_request, /* internal Samba oplock codes. */
1517 /* Information (FILE_EXISTS etc.) */
1518 uint32_t private_flags, /* Samba specific flags. */
1519 int *pinfo,
1520 files_struct *fsp)
1521 {
1522 struct smb_filename *smb_fname = fsp->fsp_name;
1523 int flags=0;
1524 int flags2=0;
1525 bool file_existed = VALID_STAT(smb_fname->st);
1526 bool def_acl = False;
1527 bool posix_open = False;
1528 bool new_file_created = False;
1529 bool clear_ads = false;
1530 struct file_id id;
1531 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1532 mode_t new_unx_mode = (mode_t)0;
1533 mode_t unx_mode = (mode_t)0;
1534 int info;
1535 uint32 existing_dos_attributes = 0;
1536 struct timeval request_time = timeval_zero();
1537 struct share_mode_lock *lck = NULL;
1538 uint32 open_access_mask = access_mask;
1539 NTSTATUS status;
1540 char *parent_dir;
1541
1542 ZERO_STRUCT(id);
1543
1544 if (conn->printer) {
1545 /*
1546 * Printers are handled completely differently.
1547 * Most of the passed parameters are ignored.
1548 */
1549
1550 if (pinfo) {
1551 *pinfo = FILE_WAS_CREATED;
1552 }
1553
1554 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1555 smb_fname_str_dbg(smb_fname)));
1556
1557 if (!req) {
1558 DEBUG(0,("open_file_ntcreate: printer open without "
1559 "an SMB request!\n"));
1560 return NT_STATUS_INTERNAL_ERROR;
1561 }
1562
1563 return print_spool_open(fsp, smb_fname->base_name,
1564 req->vuid);
1565 }
1566
1567 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1568 NULL)) {
1569 return NT_STATUS_NO_MEMORY;
1570 }
1571
1572 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1573 posix_open = True;
1574 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1575 new_dos_attributes = 0;
1576 } else {
1577 /* Windows allows a new file to be created and
1578 silently removes a FILE_ATTRIBUTE_DIRECTORY
1579 sent by the client. Do the same. */
1580
1581 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1582
1583 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1584 * created new. */
1585 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1586 smb_fname, parent_dir);
1587 }
1588
1589 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1590 "access_mask=0x%x share_access=0x%x "
1591 "create_disposition = 0x%x create_options=0x%x "
1592 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1593 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1594 access_mask, share_access, create_disposition,
1595 create_options, (unsigned int)unx_mode, oplock_request,
1596 (unsigned int)private_flags));
1597
1598 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1599 DEBUG(0, ("No smb request but not an internal only open!\n"));
1600 return NT_STATUS_INTERNAL_ERROR;
1601 }
1602
1603 /*
1604 * Only non-internal opens can be deferred at all
1605 */
1606
1607 if (req) {
1608 void *ptr;
1609 if (get_deferred_open_message_state(req,
1610 &request_time,
1611 &ptr)) {
1612
1613 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1614 /* Remember the absolute time of the original
1615 request with this mid. We'll use it later to
1616 see if this has timed out. */
1617
1618 /* Remove the deferred open entry under lock. */
1619 remove_deferred_open_entry(
1620 state->id, req->mid,
1621 sconn_server_id(req->sconn));
1622
1623 /* Ensure we don't reprocess this message. */
1624 remove_deferred_open_message_smb(req->sconn, req->mid);
1625 }
1626 }
1627
1628 status = check_name(conn, smb_fname->base_name);
1629 if (!NT_STATUS_IS_OK(status)) {
1630 return status;
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 TALLOC_FREE(lck);
2077 return fsp_open;
2078 }
2079
2080 if (!file_existed) {
2081 struct byte_range_lock *br_lck = NULL;
2082 struct share_mode_entry *batch_entry = NULL;
2083 struct share_mode_entry *exclusive_entry = NULL;
2084 bool got_level2_oplock = false;
2085 bool got_a_none_oplock = false;
2086 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2087 /*
2088 * Deal with the race condition where two smbd's detect the
2089 * file doesn't exist and do the create at the same time. One
2090 * of them will win and set a share mode, the other (ie. this
2091 * one) should check if the requested share mode for this
2092 * create is allowed.
2093 */
2094
2095 /*
2096 * Now the file exists and fsp is successfully opened,
2097 * fsp->dev and fsp->inode are valid and should replace the
2098 * dev=0,inode=0 from a non existent file. Spotted by
2099 * Nadav Danieli <nadavd@exanet.com>. JRA.
2100 */
2101
2102 id = fsp->file_id;
2103
2104 if (!acquire_ordered_locks(talloc_tos(),
2105 fsp,
2106 id,
2107 conn->connectpath,
2108 smb_fname,
2109 &old_write_time,
2110 &lck,
2111 &br_lck)) {
2112 return NT_STATUS_SHARING_VIOLATION;
2113 }
2114
2115 /* Get the types we need to examine. */
2116 find_oplock_types(fsp,
2117 oplock_request,
2118 lck,
2119 &batch_entry,
2120 &exclusive_entry,
2121 &got_level2_oplock,
2122 &got_a_none_oplock);
2123
2124 /* First pass - send break only on batch oplocks. */
2125 if ((req != NULL) &&
2126 delay_for_batch_oplocks(fsp,
2127 req->mid,
2128 oplock_request,
2129 batch_entry)) {
2130 schedule_defer_open(lck, request_time, req);
2131 TALLOC_FREE(lck);
2132 fd_close(fsp);
2133 return NT_STATUS_SHARING_VIOLATION;
2134 }
2135
2136 status = open_mode_check(conn, lck, fsp->name_hash,
2137 access_mask, share_access,
2138 create_options, &file_existed);
2139
2140 if (NT_STATUS_IS_OK(status)) {
2141 /* We might be going to allow this open. Check oplock
2142 * status again. */
2143 /* Second pass - send break for both batch or
2144 * exclusive oplocks. */
2145 if ((req != NULL) &&
2146 delay_for_exclusive_oplocks(
2147 fsp,
2148 req->mid,
2149 oplock_request,
2150 exclusive_entry)) {
2151 schedule_defer_open(lck, request_time, req);
2152 TALLOC_FREE(lck);
2153 fd_close(fsp);
2154 return NT_STATUS_SHARING_VIOLATION;
2155 }
2156 }
2157
2158 if (!NT_STATUS_IS_OK(status)) {
2159 struct deferred_open_record state;
2160
2161 state.delayed_for_oplocks = False;
2162 state.id = id;
2163
2164 /* Do it all over again immediately. In the second
2165 * round we will find that the file existed and handle
2166 * the DELETE_PENDING and FCB cases correctly. No need
2167 * to duplicate the code here. Essentially this is a
2168 * "goto top of this function", but don't tell
2169 * anybody... */
2170
2171 if (req != NULL) {
2172 defer_open(lck, request_time, timeval_zero(),
2173 req, &state);
2174 }
2175 TALLOC_FREE(lck);
2176 fd_close(fsp);
2177 return status;
2178 }
2179
2180 grant_fsp_oplock_type(fsp,
2181 br_lck,
2182 oplock_request,
2183 got_level2_oplock,
2184 got_a_none_oplock);
2185
2186 /*
2187 * We exit this block with the share entry *locked*.....
2188 */
2189
2190 }
2191
2192 SMB_ASSERT(lck != NULL);
2193
2194 /* Delete streams if create_disposition requires it */
2195 if (file_existed && clear_ads &&
2196 !is_ntfs_stream_smb_fname(smb_fname)) {
2197 status = delete_all_streams(conn, smb_fname->base_name);
2198 if (!NT_STATUS_IS_OK(status)) {
2199 TALLOC_FREE(lck);
2200 fd_close(fsp);
2201 return status;
2202 }
2203 }
2204
2205 /* note that we ignore failure for the following. It is
2206 basically a hack for NFS, and NFS will never set one of
2207 these only read them. Nobody but Samba can ever set a deny
2208 mode and we have already checked our more authoritative
2209 locking database for permission to set this deny mode. If
2210 the kernel refuses the operations then the kernel is wrong.
2211 note that GPFS supports it as well - jmcd */
2212
2213 if (fsp->fh->fd != -1) {
2214 int ret_flock;
2215 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2216 if(ret_flock == -1 ){
2217
2218 TALLOC_FREE(lck);
2219 fd_close(fsp);
2220
2221 return NT_STATUS_SHARING_VIOLATION;
2222 }
2223 }
2224
2225 /*
2226 * At this point onwards, we can guarentee that the share entry
2227 * is locked, whether we created the file or not, and that the
2228 * deny mode is compatible with all current opens.
2229 */
2230
2231 /*
2232 * If requested, truncate the file.
2233 */
2234
2235 if (file_existed && (flags2&O_TRUNC)) {
2236 /*
2237 * We are modifing the file after open - update the stat
2238 * struct..
2239 */
2240 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2241 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2242 status = map_nt_error_from_unix(errno);
2243 TALLOC_FREE(lck);
2244 fd_close(fsp);
2245 return status;
2246 }
2247 }
2248
2249 /*
2250 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2251 * but we don't have to store this - just ignore it on access check.
2252 */
2253 if (conn->sconn->using_smb2) {
2254 /*
2255 * SMB2 doesn't return it (according to Microsoft tests).
2256 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2257 * File created with access = 0x7 (Read, Write, Delete)
2258 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2259 */
2260 fsp->access_mask = access_mask;
2261 } else {
2262 /* But SMB1 does. */
2263 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2264 }
2265
2266 if (file_existed) {
2267 /* stat opens on existing files don't get oplocks. */
2268 if (is_stat_open(open_access_mask)) {
2269 fsp->oplock_type = NO_OPLOCK;
2270 }
2271
2272 if (!(flags2 & O_TRUNC)) {
2273 info = FILE_WAS_OPENED;
2274 } else {
2275 info = FILE_WAS_OVERWRITTEN;
2276 }
2277 } else {
2278 info = FILE_WAS_CREATED;
2279 }
2280
2281 if (pinfo) {
2282 *pinfo = info;
2283 }
2284
2285 /*
2286 * Setup the oplock info in both the shared memory and
2287 * file structs.
2288 */
2289
2290 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2291 /*
2292 * Could not get the kernel oplock or there are byte-range
2293 * locks on the file.
2294 */
2295 fsp->oplock_type = NO_OPLOCK;
2296 }
2297
2298 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2299 new_file_created = True;
2300 }
2301
2302 set_share_mode(lck, fsp, get_current_uid(conn),
2303 req ? req->mid : 0,
2304 fsp->oplock_type);
2305
2306 /* Handle strange delete on close create semantics. */
2307 if (create_options & FILE_DELETE_ON_CLOSE) {
2308
2309 status = can_set_delete_on_close(fsp, new_dos_attributes);
2310
2311 if (!NT_STATUS_IS_OK(status)) {
2312 /* Remember to delete the mode we just added. */
2313 del_share_mode(lck, fsp);
2314 TALLOC_FREE(lck);
2315 fd_close(fsp);
2316 return status;
2317 }
2318 /* Note that here we set the *inital* delete on close flag,
2319 not the regular one. The magic gets handled in close. */
2320 fsp->initial_delete_on_close = True;
2321 }
2322
2323 if (new_file_created) {
2324 /* Files should be initially set as archive */
2325 if (lp_map_archive(SNUM(conn)) ||
2326 lp_store_dos_attributes(SNUM(conn))) {
2327 if (!posix_open) {
2328 if (file_set_dosmode(conn, smb_fname,
2329 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2330 parent_dir, true) == 0) {
2331 unx_mode = smb_fname->st.st_ex_mode;
2332 }
2333 }
2334 }
2335 }
2336
2337 /* Determine sparse flag. */
2338 if (posix_open) {
2339 /* POSIX opens are sparse by default. */
2340 fsp->is_sparse = true;
2341 } else {
2342 fsp->is_sparse = (file_existed &&
2343 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2344 }
2345
2346 /*
2347 * Take care of inherited ACLs on created files - if default ACL not
2348 * selected.
2349 */
2350
2351 if (!posix_open && !file_existed && !def_acl) {
2352
2353 int saved_errno = errno; /* We might get ENOSYS in the next
2354 * call.. */
2355
2356 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2357 errno == ENOSYS) {
2358 errno = saved_errno; /* Ignore ENOSYS */
2359 }
2360
2361 } else if (new_unx_mode) {
2362
2363 int ret = -1;
2364
2365 /* Attributes need changing. File already existed. */
2366
2367 {
2368 int saved_errno = errno; /* We might get ENOSYS in the
2369 * next call.. */
2370 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2371
2372 if (ret == -1 && errno == ENOSYS) {
2373 errno = saved_errno; /* Ignore ENOSYS */
2374 } else {
2375 DEBUG(5, ("open_file_ntcreate: reset "
2376 "attributes of file %s to 0%o\n",
2377 smb_fname_str_dbg(smb_fname),
2378 (unsigned int)new_unx_mode));
2379 ret = 0; /* Don't do the fchmod below. */
2380 }
2381 }
2382
2383 if ((ret == -1) &&
2384 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2385 DEBUG(5, ("open_file_ntcreate: failed to reset "
2386 "attributes of file %s to 0%o\n",
2387 smb_fname_str_dbg(smb_fname),
2388 (unsigned int)new_unx_mode));
2389 }
2390
2391 /* If this is a successful open, we must remove any deferred open
2392 * records. */
2393 if (req != NULL) {
2394 del_deferred_open_entry(lck, req->mid,
2395 sconn_server_id(req->sconn));
2396 }
2397 TALLOC_FREE(lck);
2398
2399 return NT_STATUS_OK;
2400 }
2401
2402
2403 /****************************************************************************
2404 Open a file for for write to ensure that we can fchmod it.
2405 ****************************************************************************/
2406
2407 NTSTATUS open_file_fchmod(connection_struct *conn,
2408 struct smb_filename *smb_fname,
2409 files_struct **result)
2410 {
2411 if (!VALID_STAT(smb_fname->st)) {
2412 return NT_STATUS_INVALID_PARAMETER;
2413 }
2414
2415 return SMB_VFS_CREATE_FILE(
2416 conn, /* conn */
2417 NULL, /* req */
2418 0, /* root_dir_fid */
2419 smb_fname, /* fname */
2420 FILE_WRITE_DATA, /* access_mask */
2421 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2422 FILE_SHARE_DELETE),
2423 FILE_OPEN, /* create_disposition*/
2424 0, /* create_options */
2425 0, /* file_attributes */
2426 INTERNAL_OPEN_ONLY, /* oplock_request */
2427 0, /* allocation_size */
2428 0, /* private_flags */
2429 NULL, /* sd */
2430 NULL, /* ea_list */
2431 result, /* result */
2432 NULL); /* pinfo */
2433 }
2434
2435 static NTSTATUS mkdir_internal(connection_struct *conn,
2436 struct smb_filename *smb_dname,
2437 uint32 file_attributes)
2438 {
2439 mode_t mode;
2440 char *parent_dir;
2441 NTSTATUS status;
2442 bool posix_open = false;
2443 bool need_re_stat = false;
2444
2445 if(!CAN_WRITE(conn)) {
2446 DEBUG(5,("mkdir_internal: failing create on read-only share "
2447 "%s\n", lp_servicename(SNUM(conn))));
2448 return NT_STATUS_ACCESS_DENIED;
2449 }
2450
2451 status = check_name(conn, smb_dname->base_name);
2452 if (!NT_STATUS_IS_OK(status)) {
2453 return status;
2454 }
2455
2456 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2457 NULL)) {
2458 return NT_STATUS_NO_MEMORY;
2459 }
2460
2461 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2462 posix_open = true;
2463 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2464 } else {
2465 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2466 }
2467
2468 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2469 return map_nt_error_from_unix(errno);
2470 }
2471
2472 /* Ensure we're checking for a symlink here.... */
2473 /* We don't want to get caught by a symlink racer. */
2474
2475 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2476 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2477 smb_fname_str_dbg(smb_dname), strerror(errno)));
2478 return map_nt_error_from_unix(errno);
2479 }
2480
2481 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2482 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2483 smb_fname_str_dbg(smb_dname)));
2484 return NT_STATUS_NOT_A_DIRECTORY;
2485 }
2486
2487 if (lp_store_dos_attributes(SNUM(conn))) {
2488 if (!posix_open) {
2489 file_set_dosmode(conn, smb_dname,
2490 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2491 parent_dir, true);
2492 }
2493 }
2494
2495 if (lp_inherit_perms(SNUM(conn))) {
2496 inherit_access_posix_acl(conn, parent_dir,
2497 smb_dname->base_name, mode);
2498 need_re_stat = true;
2499 }
2500
2501 if (!posix_open) {
2502 /*
2503 * Check if high bits should have been set,
2504 * then (if bits are missing): add them.
2505 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2506 * dir.
2507 */
2508 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2509 (mode & ~smb_dname->st.st_ex_mode)) {
2510 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2511 (smb_dname->st.st_ex_mode |
2512 (mode & ~smb_dname->st.st_ex_mode)));
2513 need_re_stat = true;
2514 }
2515 }
2516
2517 /* Change the owner if required. */
2518 if (lp_inherit_owner(SNUM(conn))) {
2519 change_dir_owner_to_parent(conn, parent_dir,
2520 smb_dname->base_name,
2521 &smb_dname->st);
2522 need_re_stat = true;
2523 }
2524
2525 if (need_re_stat) {
2526 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2527 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2528 smb_fname_str_dbg(smb_dname), strerror(errno)));
2529 return map_nt_error_from_unix(errno);
2530 }
2531 }
2532
2533 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2534 smb_dname->base_name);
2535
2536 return NT_STATUS_OK;
2537 }
2538
2539 /****************************************************************************
2540 Ensure we didn't get symlink raced on opening a directory.
2541 ****************************************************************************/
2542
2543 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2544 const SMB_STRUCT_STAT *sbuf2)
2545 {
2546 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2547 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2548 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2549 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2550 return false;
2551 }
2552 return true;
2553 }
2554
2555 /****************************************************************************
2556 Open a directory from an NT SMB call.
2557 ****************************************************************************/
2558
2559 static NTSTATUS open_directory(connection_struct *conn,
2560 struct smb_request *req,
2561 struct smb_filename *smb_dname,
2562 uint32 access_mask,
2563 uint32 share_access,
2564 uint32 create_disposition,
2565 uint32 create_options,
2566 uint32 file_attributes,
2567 int *pinfo,
2568 files_struct **result)
2569 {
2570 files_struct *fsp = NULL;
2571 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2572 struct share_mode_lock *lck = NULL;
2573 NTSTATUS status;
2574 struct timespec mtimespec;
2575 int info = 0;
2576
2577 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2578
2579 /* Ensure we have a directory attribute. */
2580 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2581
2582 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2583 "share_access = 0x%x create_options = 0x%x, "
2584 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2585 smb_fname_str_dbg(smb_dname),
2586 (unsigned int)access_mask,
2587 (unsigned int)share_access,
2588 (unsigned int)create_options,
2589 (unsigned int)create_disposition,
2590 (unsigned int)file_attributes));
2591
2592 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2593 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2594 is_ntfs_stream_smb_fname(smb_dname)) {
2595 DEBUG(2, ("open_directory: %s is a stream name!\n",
2596 smb_fname_str_dbg(smb_dname)));
2597 return NT_STATUS_NOT_A_DIRECTORY;
2598 }
2599
2600 status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2601 access_mask, &access_mask);
2602 if (!NT_STATUS_IS_OK(status)) {
2603 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2604 "on file %s returned %s\n",
2605 smb_fname_str_dbg(smb_dname),
2606 nt_errstr(status)));
2607 return status;
2608 }
2609
2610 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2611 !security_token_has_privilege(get_current_nttok(conn),
2612 SEC_PRIV_SECURITY)) {
2613 DEBUG(10, ("open_directory: open on %s "
2614 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2615 smb_fname_str_dbg(smb_dname)));
2616 return NT_STATUS_PRIVILEGE_NOT_HELD;
2617 }
2618
2619 switch( create_disposition ) {
2620 case FILE_OPEN:
2621
2622 if (!dir_existed) {
2623 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2624 }
2625
2626 info = FILE_WAS_OPENED;
2627 break;
2628
2629 case FILE_CREATE:
2630
2631 /* If directory exists error. If directory doesn't
2632 * exist create. */
2633
2634 if (dir_existed) {
2635 status = NT_STATUS_OBJECT_NAME_COLLISION;
2636 DEBUG(2, ("open_directory: unable to create "
2637 "%s. Error was %s\n",
2638 smb_fname_str_dbg(smb_dname),
2639 nt_errstr(status)));
2640 return status;
2641 }
2642
2643 status = mkdir_internal(conn, smb_dname,
2644 file_attributes);
2645
2646 if (!NT_STATUS_IS_OK(status)) {
2647 DEBUG(2, ("open_directory: unable to create "
2648 "%s. Error was %s\n",
2649 smb_fname_str_dbg(smb_dname),
2650 nt_errstr(status)));
2651 return status;
2652 }
2653
2654 info = FILE_WAS_CREATED;
2655 break;
2656
2657 case FILE_OPEN_IF:
2658 /*
2659 * If directory exists open. If directory doesn't
2660 * exist create.
2661 */
2662
2663 if (dir_existed) {
2664 status = NT_STATUS_OK;
2665 info = FILE_WAS_OPENED;
2666 } else {
2667 status = mkdir_internal(conn, smb_dname,
2668 file_attributes);
2669
2670 if (NT_STATUS_IS_OK(status)) {
2671 info = FILE_WAS_CREATED;
2672 } else {
2673 /* Cope with create race. */
2674 if (!NT_STATUS_EQUAL(status,
2675 NT_STATUS_OBJECT_NAME_COLLISION)) {
2676 DEBUG(2, ("open_directory: unable to create "
2677 "%s. Error was %s\n",
2678 smb_fname_str_dbg(smb_dname),
2679 nt_errstr(status)));
2680 return status;
2681 }
2682 info = FILE_WAS_OPENED;
2683 }
2684 }
2685
2686 break;
2687
2688 case FILE_SUPERSEDE:
2689 case FILE_OVERWRITE:
2690 case FILE_OVERWRITE_IF:
2691 default:
2692 DEBUG(5,("open_directory: invalid create_disposition "
2693 "0x%x for directory %s\n",
2694 (unsigned int)create_disposition,
2695 smb_fname_str_dbg(smb_dname)));
2696 return NT_STATUS_INVALID_PARAMETER;
2697 }
2698
2699 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2700 DEBUG(5,("open_directory: %s is not a directory !\n",
2701 smb_fname_str_dbg(smb_dname)));
2702 return NT_STATUS_NOT_A_DIRECTORY;
2703 }
2704
2705 if (info == FILE_WAS_OPENED) {
2706 uint32_t access_granted = 0;
2707 status = smbd_check_open_rights(conn, smb_dname, access_mask,
2708 &access_granted);
2709
2710 /* Were we trying to do a directory open
2711 * for delete and didn't get DELETE
2712 * access (only) ? Check if the
2713 * directory allows DELETE_CHILD.
2714 * See here:
2715 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
2716 * for details. */
2717
2718 if ((NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
2719 (access_mask & DELETE_ACCESS) &&
2720 (access_granted == DELETE_ACCESS) &&
2721 can_delete_file_in_directory(conn, smb_dname))) {
2722 DEBUG(10,("open_directory: overrode ACCESS_DENIED "
2723 "on directory %s\n",
2724 smb_fname_str_dbg(smb_dname)));
2725 status = NT_STATUS_OK;
2726 }
2727
2728 if (!NT_STATUS_IS_OK(status)) {
2729 DEBUG(10, ("open_directory: smbd_check_open_rights on "
2730 "file %s failed with %s\n",
2731 smb_fname_str_dbg(smb_dname),
2732 nt_errstr(status)));
2733 return status;
2734 }
2735 }
2736
2737 status = file_new(req, conn, &fsp);
2738 if(!NT_STATUS_IS_OK(status)) {
2739 return status;
2740 }
2741
2742 /*
2743 * Setup the files_struct for it.
2744 */
2745
2746 fsp->mode = smb_dname->st.st_ex_mode;
2747 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2748 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2749 fsp->file_pid = req ? req->smbpid : 0;
2750 fsp->can_lock = False;
2751 fsp->can_read = False;
2752 fsp->can_write = False;
2753
2754 fsp->share_access = share_access;
2755 fsp->fh->private_options = 0;
2756 /*
2757 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2758 */
2759 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2760 fsp->print_file = NULL;
2761 fsp->modified = False;
2762 fsp->oplock_type = NO_OPLOCK;
2763 fsp->sent_oplock_break = NO_BREAK_SENT;
2764 fsp->is_directory = True;
2765 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2766 status = fsp_set_smb_fname(fsp, smb_dname);
2767 if (!NT_STATUS_IS_OK(status)) {
2768 file_free(req, fsp);
2769 return status;
2770 }
2771
2772 mtimespec = smb_dname->st.st_ex_mtime;
2773
2774 #ifdef O_DIRECTORY
2775 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2776 #else
2777 /* POSIX allows us to open a directory with O_RDONLY. */
2778 status = fd_open(conn, fsp, O_RDONLY, 0);
2779 #endif
2780 if (!NT_STATUS_IS_OK(status)) {
2781 DEBUG(5, ("open_directory: Could not open fd for "
2782 "%s (%s)\n",
2783 smb_fname_str_dbg(smb_dname),
2784 nt_errstr(status)));
2785 file_free(req, fsp);
2786 return status;
2787 }
2788
2789 status = vfs_stat_fsp(fsp);
2790 if (!NT_STATUS_IS_OK(status)) {
2791 fd_close(fsp);
2792 file_free(req, fsp);
2793 return status;
2794 }
2795
2796 /* Ensure there was no race condition. */
2797 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2798 DEBUG(5,("open_directory: stat struct differs for "
2799 "directory %s.\n",
2800 smb_fname_str_dbg(smb_dname)));
2801 fd_close(fsp);
2802 file_free(req, fsp);
2803 return NT_STATUS_ACCESS_DENIED;
2804 }
2805
2806 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2807 conn->connectpath, smb_dname, &mtimespec);
2808
2809 if (lck == NULL) {
2810 DEBUG(0, ("open_directory: Could not get share mode lock for "
2811 "%s\n", smb_fname_str_dbg(smb_dname)));
2812 fd_close(fsp);
2813 file_free(req, fsp);
2814 return NT_STATUS_SHARING_VIOLATION;
2815 }
2816
2817 status = open_mode_check(conn, lck, fsp->name_hash,
2818 access_mask, share_access,
2819 create_options, &dir_existed);
2820
2821 if (!NT_STATUS_IS_OK(status)) {
2822 TALLOC_FREE(lck);
2823 fd_close(fsp);
2824 file_free(req, fsp);
2825 return status;
2826 }
2827
2828 set_share_mode(lck, fsp, get_current_uid(conn),
2829 req ? req->mid : 0, NO_OPLOCK);
2830
2831 /* For directories the delete on close bit at open time seems
2832 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2833 if (create_options & FILE_DELETE_ON_CLOSE) {
2834 status = can_set_delete_on_close(fsp, 0);
2835 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2836 TALLOC_FREE(lck);
2837 fd_close(fsp);
2838 file_free(req, fsp);
2839 return status;
2840 }
2841
2842 if (NT_STATUS_IS_OK(status)) {
2843 /* Note that here we set the *inital* delete on close flag,
2844 not the regular one. The magic gets handled in close. */
2845 fsp->initial_delete_on_close = True;
2846 }
2847 }
2848
2849 TALLOC_FREE(lck);
2850
2851 if (pinfo) {
2852 *pinfo = info;
2853 }
2854
2855 *result = fsp;
2856 return NT_STATUS_OK;
2857 }
2858
2859 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2860 struct smb_filename *smb_dname)
2861 {
2862 NTSTATUS status;
2863 files_struct *fsp;
2864
2865 status = SMB_VFS_CREATE_FILE(
2866 conn, /* conn */
2867 req, /* req */
2868 0, /* root_dir_fid */
2869 smb_dname, /* fname */
2870 FILE_READ_ATTRIBUTES, /* access_mask */
2871 FILE_SHARE_NONE, /* share_access */
2872 FILE_CREATE, /* create_disposition*/
2873 FILE_DIRECTORY_FILE, /* create_options */
2874 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2875 0, /* oplock_request */
2876 0, /* allocation_size */
2877 0, /* private_flags */
2878 NULL, /* sd */
2879 NULL, /* ea_list */
2880 &fsp, /* result */
2881 NULL); /* pinfo */
2882
2883 if (NT_STATUS_IS_OK(status)) {
2884 close_file(req, fsp, NORMAL_CLOSE);
2885 }
2886
2887 return status;
2888 }
2889
2890 /****************************************************************************
2891 Receive notification that one of our open files has been renamed by another
2892 smbd process.
2893 ****************************************************************************/
2894
2895 void msg_file_was_renamed(struct messaging_context *msg,
2896 void *private_data,
2897 uint32_t msg_type,
2898 struct server_id server_id,
2899 DATA_BLOB *data)
2900 {
2901 struct smbd_server_connection *sconn;
2902 files_struct *fsp;
2903 char *frm = (char *)data->data;
2904 struct file_id id;
2905 const char *sharepath;
2906 const char *base_name;
2907 const char *stream_name;
2908 struct smb_filename *smb_fname = NULL;
2909 size_t sp_len, bn_len;
2910 NTSTATUS status;
2911
2912 sconn = msg_ctx_to_sconn(msg);
2913 if (sconn == NULL) {
2914 DEBUG(1, ("could not find sconn\n"));
2915 return;
2916 }
2917
2918 if (data->data == NULL
2919 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2920 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2921 (int)data->length));
2922 return;
2923 }
2924
2925 /* Unpack the message. */
2926 pull_file_id_24(frm, &id);
2927 sharepath = &frm[24];
2928 sp_len = strlen(sharepath);
2929 base_name = sharepath + sp_len + 1;
2930 bn_len = strlen(base_name);
2931 stream_name = sharepath + sp_len + 1 + bn_len + 1;
2932
2933 /* stream_name must always be NULL if there is no stream. */
2934 if (stream_name[0] == '\0') {
2935 stream_name = NULL;
2936 }
2937
2938 status = create_synthetic_smb_fname(talloc_tos(), base_name,
2939 stream_name, NULL, &smb_fname);
2940 if (!NT_STATUS_IS_OK(status)) {
2941 return;
2942 }
2943
2944 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2945 "file_id %s\n",
2946 sharepath, smb_fname_str_dbg(smb_fname),
2947 file_id_string_tos(&id)));
2948
2949 for(fsp = file_find_di_first(sconn, id); fsp;
2950 fsp = file_find_di_next(fsp)) {
2951 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2952
2953 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2954 fsp->fnum, fsp_str_dbg(fsp),
2955 smb_fname_str_dbg(smb_fname)));
2956 status = fsp_set_smb_fname(fsp, smb_fname);
2957 if (!NT_STATUS_IS_OK(status)) {
2958 goto out;
2959 }
2960 } else {
2961 /* TODO. JRA. */
2962 /* Now we have the complete path we can work out if this is
2963 actually within this share and adjust newname accordingly. */
2964 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2965 "not sharepath %s) "
2966 "fnum %d from %s -> %s\n",
2967 fsp->conn->connectpath,
2968 sharepath,
2969 fsp->fnum,
2970 fsp_str_dbg(fsp),
2971 smb_fname_str_dbg(smb_fname)));
2972 }
2973 }
2974 out:
2975 TALLOC_FREE(smb_fname);
2976 return;
2977 }
2978
2979 /*
2980 * If a main file is opened for delete, all streams need to be checked for
2981 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2982 * If that works, delete them all by setting the delete on close and close.
2983 */
2984
2985 NTSTATUS open_streams_for_delete(connection_struct *conn,
2986 const char *fname)
2987 {
2988 struct stream_struct *stream_info = NULL;
2989 files_struct **streams = NULL;
2990 int i;
2991 unsigned int num_streams = 0;
2992 TALLOC_CTX *frame = talloc_stackframe();
2993 NTSTATUS status;
2994
2995 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
2996 &num_streams, &stream_info);
2997
2998 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
2999 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3000 DEBUG(10, ("no streams around\n"));
3001 TALLOC_FREE(frame);
3002 return NT_STATUS_OK;
3003 }
3004
3005 if (!NT_STATUS_IS_OK(status)) {
3006 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3007 nt_errstr(status)));
3008 goto fail;
3009 }
3010
3011 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3012 num_streams));
3013
3014 if (num_streams == 0) {
3015 TALLOC_FREE(frame);
3016 return NT_STATUS_OK;
3017 }
3018
3019 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3020 if (streams == NULL) {
3021 DEBUG(0, ("talloc failed\n"));
3022 status = NT_STATUS_NO_MEMORY;
3023 goto fail;
3024 }
3025
3026 for (i=0; i<num_streams; i++) {
3027 struct smb_filename *smb_fname = NULL;
3028
3029 if (strequal(stream_info[i].name, "::$DATA")) {
3030 streams[i] = NULL;
3031 continue;
3032 }
3033
3034 status = create_synthetic_smb_fname(talloc_tos(), fname,
3035 stream_info[i].name,
3036 NULL, &smb_fname);
3037 if (!NT_STATUS_IS_OK(status)) {
3038 goto fail;
3039 }
3040
3041 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3042 DEBUG(10, ("Unable to stat stream: %s\n",
3043 smb_fname_str_dbg(smb_fname)));
3044 }
3045
3046 status = SMB_VFS_CREATE_FILE(
3047 conn, /* conn */
3048 NULL, /* req */
3049 0, /* root_dir_fid */
3050 smb_fname, /* fname */
3051 DELETE_ACCESS, /* access_mask */
3052 (FILE_SHARE_READ | /* share_access */
3053 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3054 FILE_OPEN, /* create_disposition*/
3055 0, /* create_options */
3056 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3057 0, /* oplock_request */
3058 0, /* allocation_size */
3059 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3060 NULL, /* sd */
3061 NULL, /* ea_list */
3062 &streams[i], /* result */
3063 NULL); /* pinfo */
3064
3065 if (!NT_STATUS_IS_OK(status)) {
3066 DEBUG(10, ("Could not open stream %s: %s\n",
3067 smb_fname_str_dbg(smb_fname),
3068 nt_errstr(status)));
3069
3070 TALLOC_FREE(smb_fname);
3071 break;
3072 }
3073 TALLOC_FREE(smb_fname);
3074 }
3075
3076 /*
3077 * don't touch the variable "status" beyond this point :-)
3078 */
3079
3080 for (i -= 1 ; i >= 0; i--) {
3081 if (streams[i] == NULL) {
3082 continue;
3083 }
3084
3085 DEBUG(10, ("Closing stream # %d, %s\n", i,
3086 fsp_str_dbg(streams[i])));
3087 close_file(NULL, streams[i], NORMAL_CLOSE);
3088 }
3089
3090 fail:
3091 TALLOC_FREE(frame);
3092 return status;
3093 }
3094
3095 /*
3096 * Wrapper around open_file_ntcreate and open_directory
3097 */
3098
3099 static NTSTATUS create_file_unixpath(connection_struct *conn,
3100 struct smb_request *req,
3101 struct smb_filename *smb_fname,
3102 uint32_t access_mask,
3103 uint32_t share_access,
3104 uint32_t create_disposition,
3105 uint32_t create_options,
3106 uint32_t file_attributes,
3107 uint32_t oplock_request,
3108 uint64_t allocation_size,
3109 uint32_t private_flags,
3110 struct security_descriptor *sd,
3111 struct ea_list *ea_list,
3112
3113 files_struct **result,
3114 int *pinfo)
3115 {
3116 int info = FILE_WAS_OPENED;
3117 files_struct *base_fsp = NULL;
3118 files_struct *fsp = NULL;
3119 NTSTATUS status;
3120
3121 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3122 "file_attributes = 0x%x, share_access = 0x%x, "
3123 "create_disposition = 0x%x create_options = 0x%x "
3124 "oplock_request = 0x%x private_flags = 0x%x "
3125 "ea_list = 0x%p, sd = 0x%p, "
3126 "fname = %s\n",
3127 (unsigned int)access_mask,
3128 (unsigned int)file_attributes,
3129 (unsigned int)share_access,
3130 (unsigned int)create_disposition,
3131 (unsigned int)create_options,
3132 (unsigned int)oplock_request,
3133 (unsigned int)private_flags,
3134 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3135
3136 if (create_options & FILE_OPEN_BY_FILE_ID) {
3137 status = NT_STATUS_NOT_SUPPORTED;
3138 goto fail;
3139 }
3140
3141 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3142 status = NT_STATUS_INVALID_PARAMETER;
3143 goto fail;
3144 }
3145
3146 if (req == NULL) {
3147 oplock_request |= INTERNAL_OPEN_ONLY;
3148 }
3149
3150 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3151 && (access_mask & DELETE_ACCESS)
3152 && !is_ntfs_stream_smb_fname(smb_fname)) {
3153 /*
3154 * We can't open a file with DELETE access if any of the
3155 * streams is open without FILE_SHARE_DELETE
3156 */
3157 status = open_streams_for_delete(conn, smb_fname->base_name);
3158
3159 if (!NT_STATUS_IS_OK(status)) {
3160 goto fail;
3161 }
3162 }
3163
3164 /* This is the correct thing to do (check every time) but can_delete
3165 * is expensive (it may have to read the parent directory
3166 * permissions). So for now we're not doing it unless we have a strong
3167 * hint the client is really going to delete this file. If the client
3168 * is forcing FILE_CREATE let the filesystem take care of the
3169 * permissions. */
3170
3171 /* Setting FILE_SHARE_DELETE is the hint. */
3172
3173 if ((create_disposition != FILE_CREATE)
3174 && (access_mask & DELETE_ACCESS)
3175 && (!(can_delete_file_in_directory(conn, smb_fname) ||
3176 can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
3177 status = NT_STATUS_ACCESS_DENIED;
3178 DEBUG(10,("create_file_unixpath: open file %s "
3179 "for delete ACCESS_DENIED\n",
3180 smb_fname_str_dbg(smb_fname)));
3181 goto fail;
3182 }
3183
3184 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3185 !security_token_has_privilege(get_current_nttok(conn),
3186 SEC_PRIV_SECURITY)) {
3187 DEBUG(10, ("create_file_unixpath: open on %s "
3188 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3189 smb_fname_str_dbg(smb_fname)));
3190 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3191 goto fail;
3192 }
3193
3194 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3195 && is_ntfs_stream_smb_fname(smb_fname)
3196 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3197 uint32 base_create_disposition;
3198 struct smb_filename *smb_fname_base = NULL;
3199
3200 if (create_options & FILE_DIRECTORY_FILE) {
3201 status = NT_STATUS_NOT_A_DIRECTORY;
3202 goto fail;
3203 }
3204
3205 switch (create_disposition) {
3206 case FILE_OPEN:
3207 base_create_disposition = FILE_OPEN;
3208 break;
3209 default:
3210 base_create_disposition = FILE_OPEN_IF;
3211 break;
3212 }
3213
3214 /* Create an smb_filename with stream_name == NULL. */
3215 status = create_synthetic_smb_fname(talloc_tos(),
3216 smb_fname->base_name,
3217 NULL, NULL,
3218 &smb_fname_base);
3219 if (!NT_STATUS_IS_OK(status)) {
3220 goto fail;
3221 }
3222
3223 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3224 DEBUG(10, ("Unable to stat stream: %s\n",
3225 smb_fname_str_dbg(smb_fname_base)));
3226 }
3227
3228 /* Open the base file. */
3229 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3230 FILE_SHARE_READ
3231 | FILE_SHARE_WRITE
3232 | FILE_SHARE_DELETE,
3233 base_create_disposition,
3234 0, 0, 0, 0, 0, NULL, NULL,
3235 &base_fsp, NULL);
3236 TALLOC_FREE(smb_fname_base);
3237
3238 if (!NT_STATUS_IS_OK(status)) {
3239 DEBUG(10, ("create_file_unixpath for base %s failed: "
3240 "%s\n", smb_fname->base_name,
3241 nt_errstr(status)));
3242 goto fail;
3243 }
3244 /* we don't need to low level fd */
3245 fd_close(base_fsp);
3246 }
3247
3248 /*
3249 * If it's a request for a directory open, deal with it separately.
3250 */
3251
3252 if (create_options & FILE_DIRECTORY_FILE) {
3253
3254 if (create_options & FILE_NON_DIRECTORY_FILE) {
3255 status = NT_STATUS_INVALID_PARAMETER;
3256 goto fail;
3257 }
3258
3259 /* Can't open a temp directory. IFS kit test. */
3260 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3261 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3262 status = NT_STATUS_INVALID_PARAMETER;
3263 goto fail;
3264 }
3265
3266 /*
3267 * We will get a create directory here if the Win32
3268 * app specified a security descriptor in the
3269 * CreateDirectory() call.
3270 */
3271
3272 oplock_request = 0;
3273 status = open_directory(
3274 conn, req, smb_fname, access_mask, share_access,
3275 create_disposition, create_options, file_attributes,
3276 &info, &fsp);
3277 } else {
3278
3279 /*
3280 * Ordinary file case.
3281 */
3282
3283 status = file_new(req, conn, &fsp);
3284 if(!NT_STATUS_IS_OK(status)) {
3285 goto fail;
3286 }
3287
3288 status = fsp_set_smb_fname(fsp, smb_fname);
3289 if (!NT_STATUS_IS_OK(status)) {
3290 goto fail;
3291 }
3292
3293 /*
3294 * We're opening the stream element of a base_fsp
3295 * we already opened. Set up the base_fsp pointer.
3296 */
3297 if (base_fsp) {
3298 fsp->base_fsp = base_fsp;
3299 }
3300
3301 status = open_file_ntcreate(conn,
3302 req,
3303 access_mask,
3304 share_access,
3305 create_disposition,
3306 create_options,
3307 file_attributes,
3308 oplock_request,
3309 private_flags,
3310 &info,
3311 fsp);
3312
3313 if(!NT_STATUS_IS_OK(status)) {
3314 file_free(req, fsp);
3315 fsp = NULL;
3316 }
3317
3318 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3319
3320 /* A stream open never opens a directory */
3321
3322 if (base_fsp) {
3323 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3324 goto fail;
3325 }
3326
3327 /*
3328 * Fail the open if it was explicitly a non-directory
3329 * file.
3330 */
3331
3332 if (create_options & FILE_NON_DIRECTORY_FILE) {
3333 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3334 goto fail;
3335 }
3336
3337 oplock_request = 0;
3338 status = open_directory(
3339 conn, req, smb_fname, access_mask,
3340 share_access, create_disposition,
3341 create_options, file_attributes,
3342 &info, &fsp);
3343 }
3344 }
3345
3346 if (!NT_STATUS_IS_OK(status)) {
3347 goto fail;
3348 }
3349
3350 fsp->base_fsp = base_fsp;
3351
3352 /*
3353 * According to the MS documentation, the only time the security
3354 * descriptor is applied to the opened file is iff we *created* the
3355 * file; an existing file stays the same.
3356 *
3357 * Also, it seems (from observation) that you can open the file with
3358 * any access mask but you can still write the sd. We need to override
3359 * the granted access before we call set_sd
3360 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3361 */
3362
3363 if ((sd != NULL) && (info == FILE_WAS_CREATED)
3364 && lp_nt_acl_support(SNUM(conn))) {
3365
3366 uint32_t sec_info_sent;
3367 uint32_t saved_access_mask = fsp->access_mask;
3368
3369 sec_info_sent = get_sec_info(sd);
3370
3371 fsp->access_mask = FILE_GENERIC_ALL;
3372
3373 /* Convert all the generic bits. */
3374 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3375 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3376
3377 if (sec_info_sent & (SECINFO_OWNER|
3378 SECINFO_GROUP|
3379 SECINFO_DACL|
3380 SECINFO_SACL)) {
3381 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3382 }
3383
3384 fsp->access_mask = saved_access_mask;
3385
3386 if (!NT_STATUS_IS_OK(status)) {
3387 goto fail;
3388 }
3389 }
3390
3391 if ((ea_list != NULL) &&
3392 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3393 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3394 if (!NT_STATUS_IS_OK(status)) {
3395 goto fail;
3396 }
3397 }
3398
3399 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3400 status = NT_STATUS_ACCESS_DENIED;
3401 goto fail;
3402 }
3403
3404 /* Save the requested allocation size. */
3405 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3406 if (allocation_size
3407 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3408 fsp->initial_allocation_size = smb_roundup(
3409 fsp->conn, allocation_size);
3410 if (fsp->is_directory) {
3411 /* Can't set allocation size on a directory. */
3412 status = NT_STATUS_ACCESS_DENIED;
3413 goto fail;
3414 }
3415 if (vfs_allocate_file_space(
3416 fsp, fsp->initial_allocation_size) == -1) {
3417 status = NT_STATUS_DISK_FULL;
3418 goto fail;
3419 }
3420 } else {
3421 fsp->initial_allocation_size = smb_roundup(
3422 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3423 }
3424 }
3425
3426 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3427
3428 *result = fsp;
3429 if (pinfo != NULL) {
3430 *pinfo = info;
3431 }
3432
3433 smb_fname->st = fsp->fsp_name->st;
3434
3435 return NT_STATUS_OK;
3436
3437 fail:
3438 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3439
3440 if (fsp != NULL) {
3441 if (base_fsp && fsp->base_fsp == base_fsp) {
3442 /*
3443 * The close_file below will close
3444 * fsp->base_fsp.
3445 */
3446 base_fsp = NULL;
3447 }
3448 close_file(req, fsp, ERROR_CLOSE);
3449 fsp = NULL;
3450 }
3451 if (base_fsp != NULL) {
3452 close_file(req, base_fsp, ERROR_CLOSE);
3453 base_fsp = NULL;
3454 }
3455 return status;
3456 }
3457
3458 /*
3459 * Calculate the full path name given a relative fid.
3460 */
3461 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3462 struct smb_request *req,
3463 uint16_t root_dir_fid,
3464 const struct smb_filename *smb_fname,
3465 struct smb_filename **smb_fname_out)
3466 {
3467 files_struct *dir_fsp;
3468 char *parent_fname = NULL;
3469 char *new_base_name = NULL;
3470 NTSTATUS status;
3471
3472 if (root_dir_fid == 0 || !smb_fname) {
3473 status = NT_STATUS_INTERNAL_ERROR;
3474 goto out;
3475 }
3476
3477 dir_fsp = file_fsp(req, root_dir_fid);
3478
3479 if (dir_fsp == NULL) {
3480 status = NT_STATUS_INVALID_HANDLE;
3481 goto out;
3482 }
3483
3484 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3485 status = NT_STATUS_INVALID_HANDLE;
3486 goto out;
3487 }
3488
3489 if (!dir_fsp->is_directory) {
3490
3491 /*
3492 * Check to see if this is a mac fork of some kind.
3493 */
3494
3495 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3496 is_ntfs_stream_smb_fname(smb_fname)) {
3497 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3498 goto out;
3499 }
3500
3501 /*
3502 we need to handle the case when we get a
3503 relative open relative to a file and the
3504 pathname is blank - this is a reopen!
3505 (hint from demyn plantenberg)
3506 */
3507
3508 status = NT_STATUS_INVALID_HANDLE;
3509 goto out;
3510 }
3511
3512 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3513 /*
3514 * We're at the toplevel dir, the final file name
3515 * must not contain ./, as this is filtered out
3516 * normally by srvstr_get_path and unix_convert
3517 * explicitly rejects paths containing ./.
3518 */
3519 parent_fname = talloc_strdup(talloc_tos(), "");
3520 if (parent_fname == NULL) {
3521 status = NT_STATUS_NO_MEMORY;
3522 goto out;
3523 }
3524 } else {
3525 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3526
3527 /*
3528 * Copy in the base directory name.
3529 */
3530
3531 parent_fname = talloc_array(talloc_tos(), char,
3532 dir_name_len+2);
3533 if (parent_fname == NULL) {
3534 status = NT_STATUS_NO_MEMORY;
3535 goto out;
3536 }
3537 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3538 dir_name_len+1);
3539
3540 /*
3541 * Ensure it ends in a '/'.
3542 * We used TALLOC_SIZE +2 to add space for the '/'.
3543 */
3544
3545 if(dir_name_len
3546 && (parent_fname[dir_name_len-1] != '\\')
3547 && (parent_fname[dir_name_len-1] != '/')) {
3548 parent_fname[dir_name_len] = '/';
3549 parent_fname[dir_name_len+1] = '\0';
3550 }
3551 }
3552
3553 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3554 smb_fname->base_name);
3555 if (new_base_name == NULL) {
3556 status = NT_STATUS_NO_MEMORY;
3557 goto out;
3558 }
3559
3560 status = filename_convert(req,
3561 conn,
3562 req->flags2 & FLAGS2_DFS_PATHNAMES,
3563 new_base_name,
3564 0,
3565 NULL,
3566 smb_fname_out);
3567 if (!NT_STATUS_IS_OK(status)) {
3568 goto out;
3569 }
3570
3571 out:
3572 TALLOC_FREE(parent_fname);
3573 TALLOC_FREE(new_base_name);
3574 return status;
3575 }
3576
3577 NTSTATUS create_file_default(connection_struct *conn,
3578 struct smb_request *req,
3579 uint16_t root_dir_fid,
3580 struct smb_filename *smb_fname,
3581 uint32_t access_mask,
3582 uint32_t share_access,
3583 uint32_t create_disposition,
3584 uint32_t create_options,
3585 uint32_t file_attributes,
3586 uint32_t oplock_request,
3587 uint64_t allocation_size,
3588 uint32_t private_flags,
3589 struct security_descriptor *sd,
3590 struct ea_list *ea_list,
3591 files_struct **result,
3592 int *pinfo)
3593 {
3594 int info = FILE_WAS_OPENED;
3595 files_struct *fsp = NULL;
3596 NTSTATUS status;
3597 bool stream_name = false;
3598
3599 DEBUG(10,("create_file: access_mask = 0x%x "
3600 "file_attributes = 0x%x, share_access = 0x%x, "
3601 "create_disposition = 0x%x create_options = 0x%x "
3602 "oplock_request = 0x%x "
3603 "private_flags = 0x%x "
3604 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3605 "fname = %s\n",
3606 (unsigned int)access_mask,
3607 (unsigned int)file_attributes,
3608 (unsigned int)share_access,
3609 (unsigned int)create_disposition,
3610 (unsigned int)create_options,
3611 (unsigned int)oplock_request,
3612 (unsigned int)private_flags,
3613 (unsigned int)root_dir_fid,
3614 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3615
3616 /*
3617 * Calculate the filename from the root_dir_if if necessary.
3618 */
3619
3620 if (root_dir_fid != 0) {
3621 struct smb_filename *smb_fname_out = NULL;
3622 status = get_relative_fid_filename(conn, req, root_dir_fid,
3623 smb_fname, &smb_fname_out);
3624 if (!NT_STATUS_IS_OK(status)) {
3625 goto fail;
3626 }
3627 smb_fname = smb_fname_out;
3628 }
3629
3630 /*
3631 * Check to see if this is a mac fork of some kind.
3632 */
3633
3634 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3635 if (stream_name) {
3636 enum FAKE_FILE_TYPE fake_file_type;
3637
3638 fake_file_type = is_fake_file(smb_fname);
3639
3640 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3641
3642 /*
3643 * Here we go! support for changing the disk quotas
3644 * --metze
3645 *
3646 * We need to fake up to open this MAGIC QUOTA file
3647 * and return a valid FID.
3648 *
3649 * w2k close this file directly after openening xp
3650 * also tries a QUERY_FILE_INFO on the file and then
3651 * close it
3652 */
3653 status = open_fake_file(req, conn, req->vuid,
3654 fake_file_type, smb_fname,
3655 access_mask, &fsp);
3656 if (!NT_STATUS_IS_OK(status)) {
3657 goto fail;
3658 }
3659
3660 ZERO_STRUCT(smb_fname->st);
3661 goto done;
3662 }
3663
3664 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3665 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3666 goto fail;
3667 }
3668 }
3669
3670 /* All file access must go through check_name() */
3671
3672 status = check_name(conn, smb_fname->base_name);
3673 if (!NT_STATUS_IS_OK(status)) {
3674 goto fail;
3675 }
3676
3677 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3678 int ret;
3679 smb_fname->stream_name = NULL;
3680 /* We have to handle this error here. */
3681 if (create_options & FILE_DIRECTORY_FILE) {
3682 status = NT_STATUS_NOT_A_DIRECTORY;
3683 goto fail;
3684 }
3685 if (lp_posix_pathnames()) {
3686 ret = SMB_VFS_LSTAT(conn, smb_fname);
3687 } else {
3688 ret = SMB_VFS_STAT(conn, smb_fname);
3689 }
3690
3691 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3692 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3693 goto fail;
3694 }
3695 }
3696
3697 status = create_file_unixpath(
3698 conn, req, smb_fname, access_mask, share_access,
3699 create_disposition, create_options, file_attributes,
3700 oplock_request, allocation_size, private_flags,
3701 sd, ea_list,
3702 &fsp, &info);
3703
3704 if (!NT_STATUS_IS_OK(status)) {
3705 goto fail;
3706 }
3707
3708 done:
3709 DEBUG(10, ("create_file: info=%d\n", info));
3710
3711 *result = fsp;
3712 if (pinfo != NULL) {
3713 *pinfo = info;
3714 }
3715 return NT_STATUS_OK;
3716
3717 fail:
3718 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3719
3720 if (fsp != NULL) {
3721 close_file(req, fsp, ERROR_CLOSE);
3722 fsp = NULL;
3723 }
3724 return status;
3725 }
Working branch of Samba for id10ts