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WHATSNEW: Start release notes for Samba 3.6.11.
[Samba.git] / source3 / smbd / open.c
blobd10b6978be6058be9474c88d90d4a4314e160825
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 /*
62 * If we can access the path to this file, by
63 * default we have FILE_READ_ATTRIBUTES from the
64 * containing directory. See the section:
65 * "Algorithm to Check Access to an Existing File"
66 * in MS-FSA.pdf.
67 */
68 return se_access_check(sd,
69 token,
70 (access_desired & ~FILE_READ_ATTRIBUTES),
71 access_granted);
72 }
73
74 /****************************************************************************
75 Check if we have open rights.
76 ****************************************************************************/
77
78 NTSTATUS smbd_check_open_rights(struct connection_struct *conn,
79 const struct smb_filename *smb_fname,
80 uint32_t access_mask,
81 uint32_t *access_granted)
82 {
83 /* Check if we have rights to open. */
84 NTSTATUS status;
85 struct security_descriptor *sd = NULL;
86 uint32_t rejected_share_access;
87
88 rejected_share_access = access_mask & ~(conn->share_access);
89
90 if (rejected_share_access) {
91 *access_granted = rejected_share_access;
92 return NT_STATUS_ACCESS_DENIED;
93 }
94
95 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
96 *access_granted = access_mask;
97
98 DEBUG(10,("smbd_check_open_rights: not checking ACL "
99 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
100 smb_fname_str_dbg(smb_fname),
101 (unsigned int)*access_granted ));
102 return NT_STATUS_OK;
103 }
104
105 if (access_mask == DELETE_ACCESS &&
106 VALID_STAT(smb_fname->st) &&
107 S_ISLNK(smb_fname->st.st_ex_mode)) {
108 /* We can always delete a symlink. */
109 DEBUG(10,("smbd_check_open_rights: not checking ACL "
110 "on DELETE_ACCESS on symlink %s.\n",
111 smb_fname_str_dbg(smb_fname) ));
112 return NT_STATUS_OK;
113 }
114
115 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
116 (SECINFO_OWNER |
117 SECINFO_GROUP |
118 SECINFO_DACL),&sd);
119
120 if (!NT_STATUS_IS_OK(status)) {
121 DEBUG(10, ("smbd_check_open_rights: Could not get acl "
122 "on %s: %s\n",
123 smb_fname_str_dbg(smb_fname),
124 nt_errstr(status)));
125 return status;
126 }
127
128 status = smb1_file_se_access_check(conn,
129 sd,
130 get_current_nttok(conn),
131 access_mask,
132 access_granted);
133
134 DEBUG(10,("smbd_check_open_rights: file %s requesting "
135 "0x%x returning 0x%x (%s)\n",
136 smb_fname_str_dbg(smb_fname),
137 (unsigned int)access_mask,
138 (unsigned int)*access_granted,
139 nt_errstr(status) ));
140
141 if (!NT_STATUS_IS_OK(status)) {
142 if (DEBUGLEVEL >= 10) {
143 DEBUG(10,("smbd_check_open_rights: acl for %s is:\n",
144 smb_fname_str_dbg(smb_fname) ));
145 NDR_PRINT_DEBUG(security_descriptor, sd);
146 }
147 }
148
149 TALLOC_FREE(sd);
150
151 return status;
152 }
153
154 /****************************************************************************
155 fd support routines - attempt to do a dos_open.
156 ****************************************************************************/
157
158 static NTSTATUS fd_open(struct connection_struct *conn,
159 files_struct *fsp,
160 int flags,
161 mode_t mode)
162 {
163 struct smb_filename *smb_fname = fsp->fsp_name;
164 NTSTATUS status = NT_STATUS_OK;
165
166 #ifdef O_NOFOLLOW
167 /*
168 * Never follow symlinks on a POSIX client. The
169 * client should be doing this.
170 */
171
172 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
173 flags |= O_NOFOLLOW;
174 }
175 #endif
176
177 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
178 if (fsp->fh->fd == -1) {
179 status = map_nt_error_from_unix(errno);
180 if (errno == EMFILE) {
181 static time_t last_warned = 0L;
182
183 if (time((time_t *) NULL) > last_warned) {
184 DEBUG(0,("Too many open files, unable "
185 "to open more! smbd's max "
186 "open files = %d\n",
187 lp_max_open_files()));
188 last_warned = time((time_t *) NULL);
189 }
190 }
191
192 }
193
194 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
195 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
196 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
197
198 return status;
199 }
200
201 /****************************************************************************
202 Close the file associated with a fsp.
203 ****************************************************************************/
204
205 NTSTATUS fd_close(files_struct *fsp)
206 {
207 int ret;
208
209 if (fsp->dptr) {
210 dptr_CloseDir(fsp);
211 }
212 if (fsp->fh->fd == -1) {
213 return NT_STATUS_OK; /* What we used to call a stat open. */
214 }
215 if (fsp->fh->ref_count > 1) {
216 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
217 }
218
219 ret = SMB_VFS_CLOSE(fsp);
220 fsp->fh->fd = -1;
221 if (ret == -1) {
222 return map_nt_error_from_unix(errno);
223 }
224 return NT_STATUS_OK;
225 }
226
227 /****************************************************************************
228 Change the ownership of a file to that of the parent directory.
229 Do this by fd if possible.
230 ****************************************************************************/
231
232 void change_file_owner_to_parent(connection_struct *conn,
233 const char *inherit_from_dir,
234 files_struct *fsp)
235 {
236 struct smb_filename *smb_fname_parent = NULL;
237 NTSTATUS status;
238 int ret;
239
240 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
241 NULL, NULL, &smb_fname_parent);
242 if (!NT_STATUS_IS_OK(status)) {
243 return;
244 }
245
246 ret = SMB_VFS_STAT(conn, smb_fname_parent);
247 if (ret == -1) {
248 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
249 "directory %s. Error was %s\n",
250 smb_fname_str_dbg(smb_fname_parent),
251 strerror(errno)));
252 TALLOC_FREE(smb_fname_parent);
253 return;
254 }
255
256 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
257 /* Already this uid - no need to change. */
258 DEBUG(10,("change_file_owner_to_parent: file %s "
259 "is already owned by uid %d\n",
260 fsp_str_dbg(fsp),
261 (int)fsp->fsp_name->st.st_ex_uid ));
262 TALLOC_FREE(smb_fname_parent);
263 return;
264 }
265
266 become_root();
267 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
268 unbecome_root();
269 if (ret == -1) {
270 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
271 "file %s to parent directory uid %u. Error "
272 "was %s\n", fsp_str_dbg(fsp),
273 (unsigned int)smb_fname_parent->st.st_ex_uid,
274 strerror(errno) ));
275 } else {
276 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
277 "parent directory uid %u.\n", fsp_str_dbg(fsp),
278 (unsigned int)smb_fname_parent->st.st_ex_uid));
279 /* Ensure the uid entry is updated. */
280 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
281 }
282
283 TALLOC_FREE(smb_fname_parent);
284 }
285
286 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
287 const char *inherit_from_dir,
288 const char *fname,
289 SMB_STRUCT_STAT *psbuf)
290 {
291 struct smb_filename *smb_fname_parent = NULL;
292 struct smb_filename *smb_fname_cwd = NULL;
293 char *saved_dir = NULL;
294 TALLOC_CTX *ctx = talloc_tos();
295 NTSTATUS status = NT_STATUS_OK;
296 int ret;
297
298 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
299 &smb_fname_parent);
300 if (!NT_STATUS_IS_OK(status)) {
301 return status;
302 }
303
304 ret = SMB_VFS_STAT(conn, smb_fname_parent);
305 if (ret == -1) {
306 status = map_nt_error_from_unix(errno);
307 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
308 "directory %s. Error was %s\n",
309 smb_fname_str_dbg(smb_fname_parent),
310 strerror(errno)));
311 goto out;
312 }
313
314 /* We've already done an lstat into psbuf, and we know it's a
315 directory. If we can cd into the directory and the dev/ino
316 are the same then we can safely chown without races as
317 we're locking the directory in place by being in it. This
318 should work on any UNIX (thanks tridge :-). JRA.
319 */
320
321 saved_dir = vfs_GetWd(ctx,conn);
322 if (!saved_dir) {
323 status = map_nt_error_from_unix(errno);
324 DEBUG(0,("change_dir_owner_to_parent: failed to get "
325 "current working directory. Error was %s\n",
326 strerror(errno)));
327 goto out;
328 }
329
330 /* Chdir into the new path. */
331 if (vfs_ChDir(conn, fname) == -1) {
332 status = map_nt_error_from_unix(errno);
333 DEBUG(0,("change_dir_owner_to_parent: failed to change "
334 "current working directory to %s. Error "
335 "was %s\n", fname, strerror(errno) ));
336 goto chdir;
337 }
338
339 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
340 &smb_fname_cwd);
341 if (!NT_STATUS_IS_OK(status)) {
342 return status;
343 }
344
345 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
346 if (ret == -1) {
347 status = map_nt_error_from_unix(errno);
348 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
349 "directory '.' (%s) Error was %s\n",
350 fname, strerror(errno)));
351 goto chdir;
352 }
353
354 /* Ensure we're pointing at the same place. */
355 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
356 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
357 DEBUG(0,("change_dir_owner_to_parent: "
358 "device/inode on directory %s changed. "
359 "Refusing to chown !\n", fname ));
360 status = NT_STATUS_ACCESS_DENIED;
361 goto chdir;
362 }
363
364 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
365 /* Already this uid - no need to change. */
366 DEBUG(10,("change_dir_owner_to_parent: directory %s "
367 "is already owned by uid %d\n",
368 fname,
369 (int)smb_fname_cwd->st.st_ex_uid ));
370 status = NT_STATUS_OK;
371 goto chdir;
372 }
373
374 become_root();
375 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
376 (gid_t)-1);
377 unbecome_root();
378 if (ret == -1) {
379 status = map_nt_error_from_unix(errno);
380 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
381 "directory %s to parent directory uid %u. "
382 "Error was %s\n", fname,
383 (unsigned int)smb_fname_parent->st.st_ex_uid,
384 strerror(errno) ));
385 goto chdir;
386 }
387
388 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
389 "directory %s to parent directory uid %u.\n",
390 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
391
392 chdir:
393 vfs_ChDir(conn,saved_dir);
394 out:
395 TALLOC_FREE(smb_fname_parent);
396 TALLOC_FREE(smb_fname_cwd);
397 return status;
398 }
399
400 /****************************************************************************
401 Open a file.
402 ****************************************************************************/
403
404 static NTSTATUS open_file(files_struct *fsp,
405 connection_struct *conn,
406 struct smb_request *req,
407 const char *parent_dir,
408 int flags,
409 mode_t unx_mode,
410 uint32 access_mask, /* client requested access mask. */
411 uint32 open_access_mask) /* what we're actually using in the open. */
412 {
413 struct smb_filename *smb_fname = fsp->fsp_name;
414 NTSTATUS status = NT_STATUS_OK;
415 int accmode = (flags & O_ACCMODE);
416 int local_flags = flags;
417 bool file_existed = VALID_STAT(fsp->fsp_name->st);
418 bool file_created = false;
419
420 fsp->fh->fd = -1;
421 errno = EPERM;
422
423 /* Check permissions */
424
425 /*
426 * This code was changed after seeing a client open request
427 * containing the open mode of (DENY_WRITE/read-only) with
428 * the 'create if not exist' bit set. The previous code
429 * would fail to open the file read only on a read-only share
430 * as it was checking the flags parameter directly against O_RDONLY,
431 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
432 * JRA.
433 */
434
435 if (!CAN_WRITE(conn)) {
436 /* It's a read-only share - fail if we wanted to write. */
437 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
438 DEBUG(3,("Permission denied opening %s\n",
439 smb_fname_str_dbg(smb_fname)));
440 return NT_STATUS_ACCESS_DENIED;
441 } else if(flags & O_CREAT) {
442 /* We don't want to write - but we must make sure that
443 O_CREAT doesn't create the file if we have write
444 access into the directory.
445 */
446 flags &= ~(O_CREAT|O_EXCL);
447 local_flags &= ~(O_CREAT|O_EXCL);
448 }
449 }
450
451 /*
452 * This little piece of insanity is inspired by the
453 * fact that an NT client can open a file for O_RDONLY,
454 * but set the create disposition to FILE_EXISTS_TRUNCATE.
455 * If the client *can* write to the file, then it expects to
456 * truncate the file, even though it is opening for readonly.
457 * Quicken uses this stupid trick in backup file creation...
458 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
459 * for helping track this one down. It didn't bite us in 2.0.x
460 * as we always opened files read-write in that release. JRA.
461 */
462
463 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
464 DEBUG(10,("open_file: truncate requested on read-only open "
465 "for file %s\n", smb_fname_str_dbg(smb_fname)));
466 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
467 }
468
469 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
470 (!file_existed && (local_flags & O_CREAT)) ||
471 ((local_flags & O_TRUNC) == O_TRUNC) ) {
472 const char *wild;
473
474 /*
475 * We can't actually truncate here as the file may be locked.
476 * open_file_ntcreate will take care of the truncate later. JRA.
477 */
478
479 local_flags &= ~O_TRUNC;
480
481 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
482 /*
483 * We would block on opening a FIFO with no one else on the
484 * other end. Do what we used to do and add O_NONBLOCK to the
485 * open flags. JRA.
486 */
487
488 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
489 local_flags |= O_NONBLOCK;
490 }
491 #endif
492
493 /* Don't create files with Microsoft wildcard characters. */
494 if (fsp->base_fsp) {
495 /*
496 * wildcard characters are allowed in stream names
497 * only test the basefilename
498 */
499 wild = fsp->base_fsp->fsp_name->base_name;
500 } else {
501 wild = smb_fname->base_name;
502 }
503 if ((local_flags & O_CREAT) && !file_existed &&
504 ms_has_wild(wild)) {
505 return NT_STATUS_OBJECT_NAME_INVALID;
506 }
507
508 /* Actually do the open */
509 status = fd_open(conn, fsp, local_flags, unx_mode);
510 if (!NT_STATUS_IS_OK(status)) {
511 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
512 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
513 nt_errstr(status),local_flags,flags));
514 return status;
515 }
516
517 if ((local_flags & O_CREAT) && !file_existed) {
518 file_created = true;
519 }
520
521 } else {
522 fsp->fh->fd = -1; /* What we used to call a stat open. */
523 if (file_existed) {
524 uint32_t access_granted = 0;
525
526 status = smbd_check_open_rights(conn,
527 smb_fname,
528 access_mask,
529 &access_granted);
530 if (!NT_STATUS_IS_OK(status)) {
531 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
532 /*
533 * On NT_STATUS_ACCESS_DENIED, access_granted
534 * contains the denied bits.
535 */
536
537 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
538 (access_granted & FILE_WRITE_ATTRIBUTES) &&
539 (lp_map_readonly(SNUM(conn)) ||
540 lp_map_archive(SNUM(conn)) ||
541 lp_map_hidden(SNUM(conn)) ||
542 lp_map_system(SNUM(conn)))) {
543 access_granted &= ~FILE_WRITE_ATTRIBUTES;
544
545 DEBUG(10,("open_file: "
546 "overrode "
547 "FILE_WRITE_"
548 "ATTRIBUTES "
549 "on file %s\n",
550 smb_fname_str_dbg(
551 smb_fname)));
552 }
553
554 if ((access_mask & DELETE_ACCESS) &&
555 (access_granted & DELETE_ACCESS) &&
556 can_delete_file_in_directory(conn,
557 smb_fname)) {
558 /* Were we trying to do a stat open
559 * for delete and didn't get DELETE
560 * access (only) ? Check if the
561 * directory allows DELETE_CHILD.
562 * See here:
563 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
564 * for details. */
565
566 access_granted &= ~DELETE_ACCESS;
567
568 DEBUG(10,("open_file: "
569 "overrode "
570 "DELETE_ACCESS on "
571 "file %s\n",
572 smb_fname_str_dbg(
573 smb_fname)));
574 }
575
576 if (access_granted != 0) {
577 DEBUG(10,("open_file: Access "
578 "denied on file "
579 "%s\n",
580 smb_fname_str_dbg(
581 smb_fname)));
582 return status;
583 }
584 } else if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
585 fsp->posix_open &&
586 S_ISLNK(smb_fname->st.st_ex_mode)) {
587 /* This is a POSIX stat open for delete
588 * or rename on a symlink that points
589 * nowhere. Allow. */
590 DEBUG(10,("open_file: allowing POSIX "
591 "open on bad symlink %s\n",
592 smb_fname_str_dbg(
593 smb_fname)));
594 } else {
595 DEBUG(10,("open_file: "
596 "smbd_check_open_rights on file "
597 "%s returned %s\n",
598 smb_fname_str_dbg(smb_fname),
599 nt_errstr(status) ));
600 return status;
601 }
602 }
603 }
604 }
605
606 if (!file_existed) {
607 int ret;
608
609 if (fsp->fh->fd == -1) {
610 ret = SMB_VFS_STAT(conn, smb_fname);
611 } else {
612 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
613 /* If we have an fd, this stat should succeed. */
614 if (ret == -1) {
615 DEBUG(0,("Error doing fstat on open file %s "
616 "(%s)\n",
617 smb_fname_str_dbg(smb_fname),
618 strerror(errno) ));
619 }
620 }
621
622 /* For a non-io open, this stat failing means file not found. JRA */
623 if (ret == -1) {
624 status = map_nt_error_from_unix(errno);
625 fd_close(fsp);
626 return status;
627 }
628
629 if (file_created) {
630 bool need_re_stat = false;
631 /* Do all inheritance work after we've
632 done a successful stat call and filled
633 in the stat struct in fsp->fsp_name. */
634
635 /* Inherit the ACL if required */
636 if (lp_inherit_perms(SNUM(conn))) {
637 inherit_access_posix_acl(conn, parent_dir,
638 smb_fname->base_name,
639 unx_mode);
640 need_re_stat = true;
641 }
642
643 /* Change the owner if required. */
644 if (lp_inherit_owner(SNUM(conn))) {
645 change_file_owner_to_parent(conn, parent_dir,
646 fsp);
647 need_re_stat = true;
648 }
649
650 if (need_re_stat) {
651 if (fsp->fh->fd == -1) {
652 ret = SMB_VFS_STAT(conn, smb_fname);
653 } else {
654 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
655 /* If we have an fd, this stat should succeed. */
656 if (ret == -1) {
657 DEBUG(0,("Error doing fstat on open file %s "
658 "(%s)\n",
659 smb_fname_str_dbg(smb_fname),
660 strerror(errno) ));
661 }
662 }
663 }
664
665 notify_fname(conn, NOTIFY_ACTION_ADDED,
666 FILE_NOTIFY_CHANGE_FILE_NAME,
667 smb_fname->base_name);
668 }
669 }
670
671 /*
672 * POSIX allows read-only opens of directories. We don't
673 * want to do this (we use a different code path for this)
674 * so catch a directory open and return an EISDIR. JRA.
675 */
676
677 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
678 fd_close(fsp);
679 errno = EISDIR;
680 return NT_STATUS_FILE_IS_A_DIRECTORY;
681 }
682
683 fsp->mode = smb_fname->st.st_ex_mode;
684 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
685 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
686 fsp->file_pid = req ? req->smbpid : 0;
687 fsp->can_lock = True;
688 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
689 if (!CAN_WRITE(conn)) {
690 fsp->can_write = False;
691 } else {
692 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
693 True : False;
694 }
695 fsp->print_file = NULL;
696 fsp->modified = False;
697 fsp->sent_oplock_break = NO_BREAK_SENT;
698 fsp->is_directory = False;
699 if (conn->aio_write_behind_list &&
700 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
701 conn->case_sensitive)) {
702 fsp->aio_write_behind = True;
703 }
704
705 fsp->wcp = NULL; /* Write cache pointer. */
706
707 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
708 conn->session_info->unix_name,
709 smb_fname_str_dbg(smb_fname),
710 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
711 conn->num_files_open));
712
713 errno = 0;
714 return NT_STATUS_OK;
715 }
716
717 /****************************************************************************
718 Check if we can open a file with a share mode.
719 Returns True if conflict, False if not.
720 ****************************************************************************/
721
722 static bool share_conflict(struct share_mode_entry *entry,
723 uint32 access_mask,
724 uint32 share_access)
725 {
726 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
727 "entry->share_access = 0x%x, "
728 "entry->private_options = 0x%x\n",
729 (unsigned int)entry->access_mask,
730 (unsigned int)entry->share_access,
731 (unsigned int)entry->private_options));
732
733 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
734 (unsigned int)access_mask, (unsigned int)share_access));
735
736 if ((entry->access_mask & (FILE_WRITE_DATA|
737 FILE_APPEND_DATA|
738 FILE_READ_DATA|
739 FILE_EXECUTE|
740 DELETE_ACCESS)) == 0) {
741 DEBUG(10,("share_conflict: No conflict due to "
742 "entry->access_mask = 0x%x\n",
743 (unsigned int)entry->access_mask ));
744 return False;
745 }
746
747 if ((access_mask & (FILE_WRITE_DATA|
748 FILE_APPEND_DATA|
749 FILE_READ_DATA|
750 FILE_EXECUTE|
751 DELETE_ACCESS)) == 0) {
752 DEBUG(10,("share_conflict: No conflict due to "
753 "access_mask = 0x%x\n",
754 (unsigned int)access_mask ));
755 return False;
756 }
757
758 #if 1 /* JRA TEST - Superdebug. */
759 #define CHECK_MASK(num, am, right, sa, share) \
760 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
761 (unsigned int)(num), (unsigned int)(am), \
762 (unsigned int)(right), (unsigned int)(am)&(right) )); \
763 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
764 (unsigned int)(num), (unsigned int)(sa), \
765 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
766 if (((am) & (right)) && !((sa) & (share))) { \
767 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
768 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
769 (unsigned int)(share) )); \
770 return True; \
771 }
772 #else
773 #define CHECK_MASK(num, am, right, sa, share) \
774 if (((am) & (right)) && !((sa) & (share))) { \
775 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
776 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
777 (unsigned int)(share) )); \
778 return True; \
779 }
780 #endif
781
782 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
783 share_access, FILE_SHARE_WRITE);
784 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
785 entry->share_access, FILE_SHARE_WRITE);
786
787 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
788 share_access, FILE_SHARE_READ);
789 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
790 entry->share_access, FILE_SHARE_READ);
791
792 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
793 share_access, FILE_SHARE_DELETE);
794 CHECK_MASK(6, access_mask, DELETE_ACCESS,
795 entry->share_access, FILE_SHARE_DELETE);
796
797 DEBUG(10,("share_conflict: No conflict.\n"));
798 return False;
799 }
800
801 #if defined(DEVELOPER)
802 static void validate_my_share_entries(struct smbd_server_connection *sconn,
803 int num,
804 struct share_mode_entry *share_entry)
805 {
806 files_struct *fsp;
807
808 if (!procid_is_me(&share_entry->pid)) {
809 return;
810 }
811
812 if (is_deferred_open_entry(share_entry) &&
813 !open_was_deferred(share_entry->op_mid)) {
814 char *str = talloc_asprintf(talloc_tos(),
815 "Got a deferred entry without a request: "
816 "PANIC: %s\n",
817 share_mode_str(talloc_tos(), num, share_entry));
818 smb_panic(str);
819 }
820
821 if (!is_valid_share_mode_entry(share_entry)) {
822 return;
823 }
824
825 fsp = file_find_dif(sconn, share_entry->id,
826 share_entry->share_file_id);
827 if (!fsp) {
828 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
829 share_mode_str(talloc_tos(), num, share_entry) ));
830 smb_panic("validate_my_share_entries: Cannot match a "
831 "share entry with an open file\n");
832 }
833
834 if (is_deferred_open_entry(share_entry) ||
835 is_unused_share_mode_entry(share_entry)) {
836 goto panic;
837 }
838
839 if ((share_entry->op_type == NO_OPLOCK) &&
840 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
841 /* Someone has already written to it, but I haven't yet
842 * noticed */
843 return;
844 }
845
846 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
847 goto panic;
848 }
849
850 return;
851
852 panic:
853 {
854 char *str;
855 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
856 share_mode_str(talloc_tos(), num, share_entry) ));
857 str = talloc_asprintf(talloc_tos(),
858 "validate_my_share_entries: "
859 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
860 fsp->fsp_name->base_name,
861 (unsigned int)fsp->oplock_type,
862 (unsigned int)share_entry->op_type );
863 smb_panic(str);
864 }
865 }
866 #endif
867
868 bool is_stat_open(uint32 access_mask)
869 {
870 return (access_mask &&
871 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
872 FILE_WRITE_ATTRIBUTES))==0) &&
873 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
874 FILE_WRITE_ATTRIBUTES)) != 0));
875 }
876
877 /****************************************************************************
878 Deal with share modes
879 Invarient: Share mode must be locked on entry and exit.
880 Returns -1 on error, or number of share modes on success (may be zero).
881 ****************************************************************************/
882
883 static NTSTATUS open_mode_check(connection_struct *conn,
884 struct share_mode_lock *lck,
885 uint32_t name_hash,
886 uint32 access_mask,
887 uint32 share_access,
888 uint32 create_options,
889 bool *file_existed)
890 {
891 int i;
892
893 if(lck->num_share_modes == 0) {
894 return NT_STATUS_OK;
895 }
896
897 *file_existed = True;
898
899 /* A delete on close prohibits everything */
900
901 if (is_delete_on_close_set(lck, name_hash)) {
902 return NT_STATUS_DELETE_PENDING;
903 }
904
905 if (is_stat_open(access_mask)) {
906 /* Stat open that doesn't trigger oplock breaks or share mode
907 * checks... ! JRA. */
908 return NT_STATUS_OK;
909 }
910
911 /*
912 * Check if the share modes will give us access.
913 */
914
915 #if defined(DEVELOPER)
916 for(i = 0; i < lck->num_share_modes; i++) {
917 validate_my_share_entries(conn->sconn, i,
918 &lck->share_modes[i]);
919 }
920 #endif
921
922 if (!lp_share_modes(SNUM(conn))) {
923 return NT_STATUS_OK;
924 }
925
926 /* Now we check the share modes, after any oplock breaks. */
927 for(i = 0; i < lck->num_share_modes; i++) {
928
929 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
930 continue;
931 }
932
933 /* someone else has a share lock on it, check to see if we can
934 * too */
935 if (share_conflict(&lck->share_modes[i],
936 access_mask, share_access)) {
937 return NT_STATUS_SHARING_VIOLATION;
938 }
939 }
940
941 return NT_STATUS_OK;
942 }
943
944 /*
945 * Send a break message to the oplock holder and delay the open for
946 * our client.
947 */
948
949 static NTSTATUS send_break_message(files_struct *fsp,
950 struct share_mode_entry *exclusive,
951 uint64_t mid,
952 int oplock_request)
953 {
954 NTSTATUS status;
955 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
956
957 DEBUG(10, ("Sending break request to PID %s\n",
958 procid_str_static(&exclusive->pid)));
959 exclusive->op_mid = mid;
960
961 /* Create the message. */
962 share_mode_entry_to_message(msg, exclusive);
963
964 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
965 don't want this set in the share mode struct pointed to by lck. */
966
967 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
968 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
969 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
970 }
971
972 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
973 MSG_SMB_BREAK_REQUEST,
974 (uint8 *)msg,
975 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
976 if (!NT_STATUS_IS_OK(status)) {
977 DEBUG(3, ("Could not send oplock break message: %s\n",
978 nt_errstr(status)));
979 }
980
981 return status;
982 }
983
984 /*
985 * Return share_mode_entry pointers for :
986 * 1). Batch oplock entry.
987 * 2). Batch or exclusive oplock entry (may be identical to #1).
988 * bool have_level2_oplock
989 * bool have_no_oplock.
990 * Do internal consistency checks on the share mode for a file.
991 */
992
993 static void find_oplock_types(files_struct *fsp,
994 int oplock_request,
995 struct share_mode_lock *lck,
996 struct share_mode_entry **pp_batch,
997 struct share_mode_entry **pp_ex_or_batch,
998 bool *got_level2,
999 bool *got_no_oplock)
1000 {
1001 int i;
1002
1003 *pp_batch = NULL;
1004 *pp_ex_or_batch = NULL;
1005 *got_level2 = false;
1006 *got_no_oplock = false;
1007
1008 /* Ignore stat or internal opens, as is done in
1009 delay_for_batch_oplocks() and
1010 delay_for_exclusive_oplocks().
1011 */
1012 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1013 return;
1014 }
1015
1016 for (i=0; i<lck->num_share_modes; i++) {
1017 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1018 continue;
1019 }
1020
1021 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1022 is_stat_open(lck->share_modes[i].access_mask)) {
1023 /* We ignore stat opens in the table - they
1024 always have NO_OPLOCK and never get or
1025 cause breaks. JRA. */
1026 continue;
1027 }
1028
1029 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1030 /* batch - can only be one. */
1031 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1032 smb_panic("Bad batch oplock entry.");
1033 }
1034 *pp_batch = &lck->share_modes[i];
1035 }
1036
1037 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1038 /* Exclusive or batch - can only be one. */
1039 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1040 smb_panic("Bad exclusive or batch oplock entry.");
1041 }
1042 *pp_ex_or_batch = &lck->share_modes[i];
1043 }
1044
1045 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1046 if (*pp_batch || *pp_ex_or_batch) {
1047 smb_panic("Bad levelII oplock entry.");
1048 }
1049 *got_level2 = true;
1050 }
1051
1052 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1053 if (*pp_batch || *pp_ex_or_batch) {
1054 smb_panic("Bad no oplock entry.");
1055 }
1056 *got_no_oplock = true;
1057 }
1058 }
1059 }
1060
1061 static bool delay_for_batch_oplocks(files_struct *fsp,
1062 uint64_t mid,
1063 int oplock_request,
1064 struct share_mode_entry *batch_entry)
1065 {
1066 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1067 return false;
1068 }
1069
1070 if (batch_entry != NULL) {
1071 /* Found a batch oplock */
1072 send_break_message(fsp, batch_entry, mid, oplock_request);
1073 return true;
1074 }
1075 return false;
1076 }
1077
1078 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1079 uint64_t mid,
1080 int oplock_request,
1081 struct share_mode_entry *ex_entry)
1082 {
1083 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1084 return false;
1085 }
1086
1087 if (ex_entry != NULL) {
1088 send_break_message(fsp, ex_entry, mid, oplock_request);
1089 return true;
1090 }
1091 return false;
1092 }
1093
1094 static void grant_fsp_oplock_type(files_struct *fsp,
1095 const struct byte_range_lock *br_lck,
1096 int oplock_request,
1097 bool got_level2_oplock,
1098 bool got_a_none_oplock)
1099 {
1100 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1101 lp_level2_oplocks(SNUM(fsp->conn));
1102
1103 /* Start by granting what the client asked for,
1104 but ensure no SAMBA_PRIVATE bits can be set. */
1105 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1106
1107 if (oplock_request & INTERNAL_OPEN_ONLY) {
1108 /* No oplocks on internal open. */
1109 fsp->oplock_type = NO_OPLOCK;
1110 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1111 fsp->oplock_type, fsp_str_dbg(fsp)));
1112 return;
1113 } else if (br_lck && br_lck->num_locks > 0) {
1114 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1115 fsp_str_dbg(fsp)));
1116 fsp->oplock_type = NO_OPLOCK;
1117 }
1118
1119 if (is_stat_open(fsp->access_mask)) {
1120 /* Leave the value already set. */
1121 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1122 fsp->oplock_type, fsp_str_dbg(fsp)));
1123 return;
1124 }
1125
1126 /*
1127 * Match what was requested (fsp->oplock_type) with
1128 * what was found in the existing share modes.
1129 */
1130
1131 if (got_a_none_oplock) {
1132 fsp->oplock_type = NO_OPLOCK;
1133 } else if (got_level2_oplock) {
1134 if (fsp->oplock_type == NO_OPLOCK ||
1135 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1136 /* Store a level2 oplock, but don't tell the client */
1137 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1138 } else {
1139 fsp->oplock_type = LEVEL_II_OPLOCK;
1140 }
1141 } else {
1142 /* All share_mode_entries are placeholders or deferred.
1143 * Silently upgrade to fake levelII if the client didn't
1144 * ask for an oplock. */
1145 if (fsp->oplock_type == NO_OPLOCK) {
1146 /* Store a level2 oplock, but don't tell the client */
1147 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1148 }
1149 }
1150
1151 /*
1152 * Don't grant level2 to clients that don't want them
1153 * or if we've turned them off.
1154 */
1155 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1156 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1157 }
1158
1159 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1160 fsp->oplock_type, fsp_str_dbg(fsp)));
1161 }
1162
1163 bool request_timed_out(struct timeval request_time,
1164 struct timeval timeout)
1165 {
1166 struct timeval now, end_time;
1167 GetTimeOfDay(&now);
1168 end_time = timeval_sum(&request_time, &timeout);
1169 return (timeval_compare(&end_time, &now) < 0);
1170 }
1171
1172 /****************************************************************************
1173 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1174 ****************************************************************************/
1175
1176 static void defer_open(struct share_mode_lock *lck,
1177 struct timeval request_time,
1178 struct timeval timeout,
1179 struct smb_request *req,
1180 struct deferred_open_record *state)
1181 {
1182 int i;
1183
1184 /* Paranoia check */
1185
1186 for (i=0; i<lck->num_share_modes; i++) {
1187 struct share_mode_entry *e = &lck->share_modes[i];
1188
1189 if (!is_deferred_open_entry(e)) {
1190 continue;
1191 }
1192
1193 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
1194 DEBUG(0, ("Trying to defer an already deferred "
1195 "request: mid=%llu, exiting\n",
1196 (unsigned long long)req->mid));
1197 exit_server("attempt to defer a deferred request");
1198 }
1199 }
1200
1201 /* End paranoia check */
1202
1203 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1204 "open entry for mid %llu\n",
1205 (unsigned int)request_time.tv_sec,
1206 (unsigned int)request_time.tv_usec,
1207 (unsigned long long)req->mid));
1208
1209 if (!push_deferred_open_message_smb(req, request_time, timeout,
1210 state->id, (char *)state, sizeof(*state))) {
1211 exit_server("push_deferred_open_message_smb failed");
1212 }
1213 add_deferred_open(lck, req->mid, request_time,
1214 sconn_server_id(req->sconn), state->id);
1215 }
1216
1217
1218 /****************************************************************************
1219 On overwrite open ensure that the attributes match.
1220 ****************************************************************************/
1221
1222 bool open_match_attributes(connection_struct *conn,
1223 uint32 old_dos_attr,
1224 uint32 new_dos_attr,
1225 mode_t existing_unx_mode,
1226 mode_t new_unx_mode,
1227 mode_t *returned_unx_mode)
1228 {
1229 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1230
1231 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1232 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1233
1234 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1235 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1236 *returned_unx_mode = new_unx_mode;
1237 } else {
1238 *returned_unx_mode = (mode_t)0;
1239 }
1240
1241 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1242 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1243 "returned_unx_mode = 0%o\n",
1244 (unsigned int)old_dos_attr,
1245 (unsigned int)existing_unx_mode,
1246 (unsigned int)new_dos_attr,
1247 (unsigned int)*returned_unx_mode ));
1248
1249 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1250 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1251 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1252 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1253 return False;
1254 }
1255 }
1256 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1257 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1258 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1259 return False;
1260 }
1261 }
1262 return True;
1263 }
1264
1265 /****************************************************************************
1266 Special FCB or DOS processing in the case of a sharing violation.
1267 Try and find a duplicated file handle.
1268 ****************************************************************************/
1269
1270 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1271 connection_struct *conn,
1272 files_struct *fsp_to_dup_into,
1273 const struct smb_filename *smb_fname,
1274 struct file_id id,
1275 uint16 file_pid,
1276 uint16 vuid,
1277 uint32 access_mask,
1278 uint32 share_access,
1279 uint32 create_options)
1280 {
1281 files_struct *fsp;
1282
1283 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1284 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1285
1286 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1287 fsp = file_find_di_next(fsp)) {
1288
1289 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1290 "vuid = %u, file_pid = %u, private_options = 0x%x "
1291 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1292 fsp->fh->fd, (unsigned int)fsp->vuid,
1293 (unsigned int)fsp->file_pid,
1294 (unsigned int)fsp->fh->private_options,
1295 (unsigned int)fsp->access_mask ));
1296
1297 if (fsp->fh->fd != -1 &&
1298 fsp->vuid == vuid &&
1299 fsp->file_pid == file_pid &&
1300 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1301 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1302 (fsp->access_mask & FILE_WRITE_DATA) &&
1303 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1304 strequal(fsp->fsp_name->stream_name,
1305 smb_fname->stream_name)) {
1306 DEBUG(10,("fcb_or_dos_open: file match\n"));
1307 break;
1308 }
1309 }
1310
1311 if (!fsp) {
1312 return NT_STATUS_NOT_FOUND;
1313 }
1314
1315 /* quite an insane set of semantics ... */
1316 if (is_executable(smb_fname->base_name) &&
1317 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1318 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1319 return NT_STATUS_INVALID_PARAMETER;
1320 }
1321
1322 /* We need to duplicate this fsp. */
1323 return dup_file_fsp(req, fsp, access_mask, share_access,
1324 create_options, fsp_to_dup_into);
1325 }
1326
1327 static void schedule_defer_open(struct share_mode_lock *lck,
1328 struct timeval request_time,
1329 struct smb_request *req)
1330 {
1331 struct deferred_open_record state;
1332
1333 /* This is a relative time, added to the absolute
1334 request_time value to get the absolute timeout time.
1335 Note that if this is the second or greater time we enter
1336 this codepath for this particular request mid then
1337 request_time is left as the absolute time of the *first*
1338 time this request mid was processed. This is what allows
1339 the request to eventually time out. */
1340
1341 struct timeval timeout;
1342
1343 /* Normally the smbd we asked should respond within
1344 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1345 * the client did, give twice the timeout as a safety
1346 * measure here in case the other smbd is stuck
1347 * somewhere else. */
1348
1349 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1350
1351 /* Nothing actually uses state.delayed_for_oplocks
1352 but it's handy to differentiate in debug messages
1353 between a 30 second delay due to oplock break, and
1354 a 1 second delay for share mode conflicts. */
1355
1356 state.delayed_for_oplocks = True;
1357 state.id = lck->id;
1358
1359 if (!request_timed_out(request_time, timeout)) {
1360 defer_open(lck, request_time, timeout, req, &state);
1361 }
1362 }
1363
1364 /****************************************************************************
1365 Work out what access_mask to use from what the client sent us.
1366 ****************************************************************************/
1367
1368 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1369 const struct smb_filename *smb_fname,
1370 bool file_existed,
1371 uint32_t access_mask,
1372 uint32_t *access_mask_out)
1373 {
1374 NTSTATUS status;
1375 uint32_t orig_access_mask = access_mask;
1376 uint32_t rejected_share_access;
1377
1378 /*
1379 * Convert GENERIC bits to specific bits.
1380 */
1381
1382 se_map_generic(&access_mask, &file_generic_mapping);
1383
1384 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1385 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1386 if (file_existed) {
1387
1388 struct security_descriptor *sd;
1389 uint32_t access_granted = 0;
1390
1391 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1392 (SECINFO_OWNER |
1393 SECINFO_GROUP |
1394 SECINFO_DACL),&sd);
1395
1396 if (!NT_STATUS_IS_OK(status)) {
1397 DEBUG(10,("smbd_calculate_access_mask: "
1398 "Could not get acl on file %s: %s\n",
1399 smb_fname_str_dbg(smb_fname),
1400 nt_errstr(status)));
1401 return NT_STATUS_ACCESS_DENIED;
1402 }
1403
1404 status = smb1_file_se_access_check(conn,
1405 sd,
1406 get_current_nttok(conn),
1407 access_mask,
1408 &access_granted);
1409
1410 TALLOC_FREE(sd);
1411
1412 if (!NT_STATUS_IS_OK(status)) {
1413 DEBUG(10, ("smbd_calculate_access_mask: "
1414 "Access denied on file %s: "
1415 "when calculating maximum access\n",
1416 smb_fname_str_dbg(smb_fname)));
1417 return NT_STATUS_ACCESS_DENIED;
1418 }
1419
1420 if (!(access_granted & DELETE_ACCESS)) {
1421 if (can_delete_file_in_directory(conn, smb_fname)) {
1422 access_granted |= DELETE_ACCESS;
1423 }
1424 }
1425
1426 /*
1427 * If we can access the path to this file, by
1428 * default we have FILE_READ_ATTRIBUTES from the
1429 * containing directory. See the section.
1430 * "Algorithm to Check Access to an Existing File"
1431 * in MS-FSA.pdf.
1432 */
1433 access_mask = access_granted | FILE_READ_ATTRIBUTES;
1434 } else {
1435 access_mask = FILE_GENERIC_ALL;
1436 }
1437
1438 access_mask &= conn->share_access;
1439 }
1440
1441 rejected_share_access = access_mask & ~(conn->share_access);
1442
1443 if (rejected_share_access) {
1444 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1445 "file %s: rejected by share access mask[0x%08X] "
1446 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1447 smb_fname_str_dbg(smb_fname),
1448 conn->share_access,
1449 orig_access_mask, access_mask,
1450 rejected_share_access));
1451 return NT_STATUS_ACCESS_DENIED;
1452 }
1453
1454 *access_mask_out = access_mask;
1455 return NT_STATUS_OK;
1456 }
1457
1458 /****************************************************************************
1459 Remove the deferred open entry under lock.
1460 ****************************************************************************/
1461
1462 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1463 struct server_id pid)
1464 {
1465 struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1466 NULL, NULL, NULL);
1467 if (lck == NULL) {
1468 DEBUG(0, ("could not get share mode lock\n"));
1469 } else {
1470 del_deferred_open_entry(lck, mid, pid);
1471 TALLOC_FREE(lck);
1472 }
1473 }
1474
1475 /****************************************************************
1476 Ensure we get the brlock lock followed by the share mode lock
1477 in the correct order to prevent deadlocks if other smbd's are
1478 using the brlock database on this file simultaneously with this open
1479 (that code also gets the locks in brlock -> share mode lock order).
1480 ****************************************************************/
1481
1482 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1483 files_struct *fsp,
1484 const struct file_id id,
1485 const char *connectpath,
1486 const struct smb_filename *smb_fname,
1487 const struct timespec *p_old_write_time,
1488 struct share_mode_lock **p_lck,
1489 struct byte_range_lock **p_br_lck)
1490 {
1491 /* Ordering - we must get the br_lck for this
1492 file before the share mode. */
1493 if (lp_locking(fsp->conn->params)) {
1494 *p_br_lck = brl_get_locks_readonly(fsp);
1495 if (*p_br_lck == NULL) {
1496 DEBUG(0, ("Could not get br_lock\n"));
1497 return false;
1498 }
1499 /* Note - we don't need to free the returned
1500 br_lck explicitly as it was allocated on talloc_tos()
1501 and so will be autofreed (and release the lock)
1502 once the frame context disappears.
1503
1504 If it was set to fsp->brlock_rec then it was
1505 talloc_move'd to hang off the fsp pointer and
1506 in this case is guarenteed to not be holding the
1507 lock on the brlock database. */
1508 }
1509
1510 *p_lck = get_share_mode_lock(mem_ctx,
1511 id,
1512 connectpath,
1513 smb_fname,
1514 p_old_write_time);
1515
1516 if (*p_lck == NULL) {
1517 DEBUG(0, ("Could not get share mode lock\n"));
1518 TALLOC_FREE(*p_br_lck);
1519 return false;
1520 }
1521 return true;
1522 }
1523
1524 /****************************************************************************
1525 Open a file with a share mode. Passed in an already created files_struct *.
1526 ****************************************************************************/
1527
1528 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1529 struct smb_request *req,
1530 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1531 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1532 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1533 uint32 create_options, /* options such as delete on close. */
1534 uint32 new_dos_attributes, /* attributes used for new file. */
1535 int oplock_request, /* internal Samba oplock codes. */
1536 /* Information (FILE_EXISTS etc.) */
1537 uint32_t private_flags, /* Samba specific flags. */
1538 int *pinfo,
1539 files_struct *fsp)
1540 {
1541 struct smb_filename *smb_fname = fsp->fsp_name;
1542 int flags=0;
1543 int flags2=0;
1544 bool file_existed = VALID_STAT(smb_fname->st);
1545 bool def_acl = False;
1546 bool posix_open = False;
1547 bool new_file_created = False;
1548 bool clear_ads = false;
1549 struct file_id id;
1550 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1551 mode_t new_unx_mode = (mode_t)0;
1552 mode_t unx_mode = (mode_t)0;
1553 int info;
1554 uint32 existing_dos_attributes = 0;
1555 struct timeval request_time = timeval_zero();
1556 struct share_mode_lock *lck = NULL;
1557 uint32 open_access_mask = access_mask;
1558 NTSTATUS status;
1559 char *parent_dir;
1560
1561 ZERO_STRUCT(id);
1562
1563 if (conn->printer) {
1564 /*
1565 * Printers are handled completely differently.
1566 * Most of the passed parameters are ignored.
1567 */
1568
1569 if (pinfo) {
1570 *pinfo = FILE_WAS_CREATED;
1571 }
1572
1573 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1574 smb_fname_str_dbg(smb_fname)));
1575
1576 if (!req) {
1577 DEBUG(0,("open_file_ntcreate: printer open without "
1578 "an SMB request!\n"));
1579 return NT_STATUS_INTERNAL_ERROR;
1580 }
1581
1582 return print_spool_open(fsp, smb_fname->base_name,
1583 req->vuid);
1584 }
1585
1586 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1587 NULL)) {
1588 return NT_STATUS_NO_MEMORY;
1589 }
1590
1591 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1592 posix_open = True;
1593 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1594 new_dos_attributes = 0;
1595 } else {
1596 /* Windows allows a new file to be created and
1597 silently removes a FILE_ATTRIBUTE_DIRECTORY
1598 sent by the client. Do the same. */
1599
1600 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1601
1602 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1603 * created new. */
1604 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1605 smb_fname, parent_dir);
1606 }
1607
1608 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1609 "access_mask=0x%x share_access=0x%x "
1610 "create_disposition = 0x%x create_options=0x%x "
1611 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1612 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1613 access_mask, share_access, create_disposition,
1614 create_options, (unsigned int)unx_mode, oplock_request,
1615 (unsigned int)private_flags));
1616
1617 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1618 DEBUG(0, ("No smb request but not an internal only open!\n"));
1619 return NT_STATUS_INTERNAL_ERROR;
1620 }
1621
1622 /*
1623 * Only non-internal opens can be deferred at all
1624 */
1625
1626 if (req) {
1627 void *ptr;
1628 if (get_deferred_open_message_state(req,
1629 &request_time,
1630 &ptr)) {
1631
1632 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1633 /* Remember the absolute time of the original
1634 request with this mid. We'll use it later to
1635 see if this has timed out. */
1636
1637 /* Remove the deferred open entry under lock. */
1638 remove_deferred_open_entry(
1639 state->id, req->mid,
1640 sconn_server_id(req->sconn));
1641
1642 /* Ensure we don't reprocess this message. */
1643 remove_deferred_open_message_smb(req->mid);
1644 }
1645 }
1646
1647 if (!posix_open) {
1648 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1649 if (file_existed) {
1650 existing_dos_attributes = dos_mode(conn, smb_fname);
1651 }
1652 }
1653
1654 /* ignore any oplock requests if oplocks are disabled */
1655 if (!lp_oplocks(SNUM(conn)) ||
1656 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1657 /* Mask off everything except the private Samba bits. */
1658 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1659 }
1660
1661 /* this is for OS/2 long file names - say we don't support them */
1662 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1663 /* OS/2 Workplace shell fix may be main code stream in a later
1664 * release. */
1665 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1666 "supported.\n"));
1667 if (use_nt_status()) {
1668 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1669 }
1670 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1671 }
1672
1673 switch( create_disposition ) {
1674 /*
1675 * Currently we're using FILE_SUPERSEDE as the same as
1676 * FILE_OVERWRITE_IF but they really are
1677 * different. FILE_SUPERSEDE deletes an existing file
1678 * (requiring delete access) then recreates it.
1679 */
1680 case FILE_SUPERSEDE:
1681 /* If file exists replace/overwrite. If file doesn't
1682 * exist create. */
1683 flags2 |= (O_CREAT | O_TRUNC);
1684 clear_ads = true;
1685 break;
1686
1687 case FILE_OVERWRITE_IF:
1688 /* If file exists replace/overwrite. If file doesn't
1689 * exist create. */
1690 flags2 |= (O_CREAT | O_TRUNC);
1691 clear_ads = true;
1692 break;
1693
1694 case FILE_OPEN:
1695 /* If file exists open. If file doesn't exist error. */
1696 if (!file_existed) {
1697 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1698 "requested for file %s and file "
1699 "doesn't exist.\n",
1700 smb_fname_str_dbg(smb_fname)));
1701 errno = ENOENT;
1702 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1703 }
1704 break;
1705
1706 case FILE_OVERWRITE:
1707 /* If file exists overwrite. If file doesn't exist
1708 * error. */
1709 if (!file_existed) {
1710 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1711 "requested for file %s and file "
1712 "doesn't exist.\n",
1713 smb_fname_str_dbg(smb_fname) ));
1714 errno = ENOENT;
1715 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1716 }
1717 flags2 |= O_TRUNC;
1718 clear_ads = true;
1719 break;
1720
1721 case FILE_CREATE:
1722 /* If file exists error. If file doesn't exist
1723 * create. */
1724 if (file_existed) {
1725 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1726 "requested for file %s and file "
1727 "already exists.\n",
1728 smb_fname_str_dbg(smb_fname)));
1729 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1730 errno = EISDIR;
1731 } else {
1732 errno = EEXIST;
1733 }
1734 return map_nt_error_from_unix(errno);
1735 }
1736 flags2 |= (O_CREAT|O_EXCL);
1737 break;
1738
1739 case FILE_OPEN_IF:
1740 /* If file exists open. If file doesn't exist
1741 * create. */
1742 flags2 |= O_CREAT;
1743 break;
1744
1745 default:
1746 return NT_STATUS_INVALID_PARAMETER;
1747 }
1748
1749 /* We only care about matching attributes on file exists and
1750 * overwrite. */
1751
1752 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1753 (create_disposition == FILE_OVERWRITE_IF))) {
1754 if (!open_match_attributes(conn, existing_dos_attributes,
1755 new_dos_attributes,
1756 smb_fname->st.st_ex_mode,
1757 unx_mode, &new_unx_mode)) {
1758 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1759 "for file %s (%x %x) (0%o, 0%o)\n",
1760 smb_fname_str_dbg(smb_fname),
1761 existing_dos_attributes,
1762 new_dos_attributes,
1763 (unsigned int)smb_fname->st.st_ex_mode,
1764 (unsigned int)unx_mode ));
1765 errno = EACCES;
1766 return NT_STATUS_ACCESS_DENIED;
1767 }
1768 }
1769
1770 status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1771 access_mask,
1772 &access_mask);
1773 if (!NT_STATUS_IS_OK(status)) {
1774 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1775 "on file %s returned %s\n",
1776 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1777 return status;
1778 }
1779
1780 open_access_mask = access_mask;
1781
1782 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1783 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1784 }
1785
1786 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1787 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1788 access_mask));
1789
1790 /*
1791 * Note that we ignore the append flag as append does not
1792 * mean the same thing under DOS and Unix.
1793 */
1794
1795 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1796 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1797 /* DENY_DOS opens are always underlying read-write on the
1798 file handle, no matter what the requested access mask
1799 says. */
1800 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1801 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1802 flags = O_RDWR;
1803 } else {
1804 flags = O_WRONLY;
1805 }
1806 } else {
1807 flags = O_RDONLY;
1808 }
1809
1810 /*
1811 * Currently we only look at FILE_WRITE_THROUGH for create options.
1812 */
1813
1814 #if defined(O_SYNC)
1815 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1816 flags2 |= O_SYNC;
1817 }
1818 #endif /* O_SYNC */
1819
1820 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1821 flags2 |= O_APPEND;
1822 }
1823
1824 if (!posix_open && !CAN_WRITE(conn)) {
1825 /*
1826 * We should really return a permission denied error if either
1827 * O_CREAT or O_TRUNC are set, but for compatibility with
1828 * older versions of Samba we just AND them out.
1829 */
1830 flags2 &= ~(O_CREAT|O_TRUNC);
1831 }
1832
1833 /*
1834 * Ensure we can't write on a read-only share or file.
1835 */
1836
1837 if (flags != O_RDONLY && file_existed &&
1838 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1839 DEBUG(5,("open_file_ntcreate: write access requested for "
1840 "file %s on read only %s\n",
1841 smb_fname_str_dbg(smb_fname),
1842 !CAN_WRITE(conn) ? "share" : "file" ));
1843 errno = EACCES;
1844 return NT_STATUS_ACCESS_DENIED;
1845 }
1846
1847 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1848 fsp->share_access = share_access;
1849 fsp->fh->private_options = private_flags;
1850 fsp->access_mask = open_access_mask; /* We change this to the
1851 * requested access_mask after
1852 * the open is done. */
1853 fsp->posix_open = posix_open;
1854
1855 /* Ensure no SAMBA_PRIVATE bits can be set. */
1856 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1857
1858 if (timeval_is_zero(&request_time)) {
1859 request_time = fsp->open_time;
1860 }
1861
1862 if (file_existed) {
1863 struct byte_range_lock *br_lck = NULL;
1864 struct share_mode_entry *batch_entry = NULL;
1865 struct share_mode_entry *exclusive_entry = NULL;
1866 bool got_level2_oplock = false;
1867 bool got_a_none_oplock = false;
1868
1869 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1870 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1871
1872 if (!acquire_ordered_locks(talloc_tos(),
1873 fsp,
1874 id,
1875 conn->connectpath,
1876 smb_fname,
1877 &old_write_time,
1878 &lck,
1879 &br_lck)) {
1880 return NT_STATUS_SHARING_VIOLATION;
1881 }
1882
1883 /* Get the types we need to examine. */
1884 find_oplock_types(fsp,
1885 oplock_request,
1886 lck,
1887 &batch_entry,
1888 &exclusive_entry,
1889 &got_level2_oplock,
1890 &got_a_none_oplock);
1891
1892 /* First pass - send break only on batch oplocks. */
1893 if ((req != NULL) &&
1894 delay_for_batch_oplocks(fsp,
1895 req->mid,
1896 oplock_request,
1897 batch_entry)) {
1898 schedule_defer_open(lck, request_time, req);
1899 TALLOC_FREE(lck);
1900 return NT_STATUS_SHARING_VIOLATION;
1901 }
1902
1903 /* Use the client requested access mask here, not the one we
1904 * open with. */
1905 status = open_mode_check(conn, lck, fsp->name_hash,
1906 access_mask, share_access,
1907 create_options, &file_existed);
1908
1909 if (NT_STATUS_IS_OK(status)) {
1910 /* We might be going to allow this open. Check oplock
1911 * status again. */
1912 /* Second pass - send break for both batch or
1913 * exclusive oplocks. */
1914 if ((req != NULL) &&
1915 delay_for_exclusive_oplocks(
1916 fsp,
1917 req->mid,
1918 oplock_request,
1919 exclusive_entry)) {
1920 schedule_defer_open(lck, request_time, req);
1921 TALLOC_FREE(lck);
1922 return NT_STATUS_SHARING_VIOLATION;
1923 }
1924 }
1925
1926 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1927 /* DELETE_PENDING is not deferred for a second */
1928 TALLOC_FREE(lck);
1929 return status;
1930 }
1931
1932 grant_fsp_oplock_type(fsp,
1933 br_lck,
1934 oplock_request,
1935 got_level2_oplock,
1936 got_a_none_oplock);
1937
1938 if (!NT_STATUS_IS_OK(status)) {
1939 uint32 can_access_mask;
1940 bool can_access = True;
1941
1942 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1943
1944 /* Check if this can be done with the deny_dos and fcb
1945 * calls. */
1946 if (private_flags &
1947 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1948 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1949 if (req == NULL) {
1950 DEBUG(0, ("DOS open without an SMB "
1951 "request!\n"));
1952 TALLOC_FREE(lck);
1953 return NT_STATUS_INTERNAL_ERROR;
1954 }
1955
1956 /* Use the client requested access mask here,
1957 * not the one we open with. */
1958 status = fcb_or_dos_open(req,
1959 conn,
1960 fsp,
1961 smb_fname,
1962 id,
1963 req->smbpid,
1964 req->vuid,
1965 access_mask,
1966 share_access,
1967 create_options);
1968
1969 if (NT_STATUS_IS_OK(status)) {
1970 TALLOC_FREE(lck);
1971 if (pinfo) {
1972 *pinfo = FILE_WAS_OPENED;
1973 }
1974 return NT_STATUS_OK;
1975 }
1976 }
1977
1978 /*
1979 * This next line is a subtlety we need for
1980 * MS-Access. If a file open will fail due to share
1981 * permissions and also for security (access) reasons,
1982 * we need to return the access failed error, not the
1983 * share error. We can't open the file due to kernel
1984 * oplock deadlock (it's possible we failed above on
1985 * the open_mode_check()) so use a userspace check.
1986 */
1987
1988 if (flags & O_RDWR) {
1989 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1990 } else if (flags & O_WRONLY) {
1991 can_access_mask = FILE_WRITE_DATA;
1992 } else {
1993 can_access_mask = FILE_READ_DATA;
1994 }
1995
1996 if (((can_access_mask & FILE_WRITE_DATA) &&
1997 !CAN_WRITE(conn)) ||
1998 !can_access_file_data(conn, smb_fname,
1999 can_access_mask)) {
2000 can_access = False;
2001 }
2002
2003 /*
2004 * If we're returning a share violation, ensure we
2005 * cope with the braindead 1 second delay.
2006 */
2007
2008 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2009 lp_defer_sharing_violations()) {
2010 struct timeval timeout;
2011 struct deferred_open_record state;
2012 int timeout_usecs;
2013
2014 /* this is a hack to speed up torture tests
2015 in 'make test' */
2016 timeout_usecs = lp_parm_int(SNUM(conn),
2017 "smbd","sharedelay",
2018 SHARING_VIOLATION_USEC_WAIT);
2019
2020 /* This is a relative time, added to the absolute
2021 request_time value to get the absolute timeout time.
2022 Note that if this is the second or greater time we enter
2023 this codepath for this particular request mid then
2024 request_time is left as the absolute time of the *first*
2025 time this request mid was processed. This is what allows
2026 the request to eventually time out. */
2027
2028 timeout = timeval_set(0, timeout_usecs);
2029
2030 /* Nothing actually uses state.delayed_for_oplocks
2031 but it's handy to differentiate in debug messages
2032 between a 30 second delay due to oplock break, and
2033 a 1 second delay for share mode conflicts. */
2034
2035 state.delayed_for_oplocks = False;
2036 state.id = id;
2037
2038 if ((req != NULL)
2039 && !request_timed_out(request_time,
2040 timeout)) {
2041 defer_open(lck, request_time, timeout,
2042 req, &state);
2043 }
2044 }
2045
2046 TALLOC_FREE(lck);
2047 if (can_access) {
2048 /*
2049 * We have detected a sharing violation here
2050 * so return the correct error code
2051 */
2052 status = NT_STATUS_SHARING_VIOLATION;
2053 } else {
2054 status = NT_STATUS_ACCESS_DENIED;
2055 }
2056 return status;
2057 }
2058
2059 /*
2060 * We exit this block with the share entry *locked*.....
2061 */
2062 }
2063
2064 SMB_ASSERT(!file_existed || (lck != NULL));
2065
2066 /*
2067 * Ensure we pay attention to default ACLs on directories if required.
2068 */
2069
2070 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2071 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2072 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2073 }
2074
2075 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2076 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2077 (unsigned int)flags, (unsigned int)flags2,
2078 (unsigned int)unx_mode, (unsigned int)access_mask,
2079 (unsigned int)open_access_mask));
2080
2081 /*
2082 * open_file strips any O_TRUNC flags itself.
2083 */
2084
2085 fsp_open = open_file(fsp, conn, req, parent_dir,
2086 flags|flags2, unx_mode, access_mask,
2087 open_access_mask);
2088
2089 if (!NT_STATUS_IS_OK(fsp_open)) {
2090 if (lck != NULL) {
2091 TALLOC_FREE(lck);
2092 }
2093 return fsp_open;
2094 }
2095
2096 if (!file_existed) {
2097 struct byte_range_lock *br_lck = NULL;
2098 struct share_mode_entry *batch_entry = NULL;
2099 struct share_mode_entry *exclusive_entry = NULL;
2100 bool got_level2_oplock = false;
2101 bool got_a_none_oplock = false;
2102 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2103 /*
2104 * Deal with the race condition where two smbd's detect the
2105 * file doesn't exist and do the create at the same time. One
2106 * of them will win and set a share mode, the other (ie. this
2107 * one) should check if the requested share mode for this
2108 * create is allowed.
2109 */
2110
2111 /*
2112 * Now the file exists and fsp is successfully opened,
2113 * fsp->dev and fsp->inode are valid and should replace the
2114 * dev=0,inode=0 from a non existent file. Spotted by
2115 * Nadav Danieli <nadavd@exanet.com>. JRA.
2116 */
2117
2118 id = fsp->file_id;
2119
2120 if (!acquire_ordered_locks(talloc_tos(),
2121 fsp,
2122 id,
2123 conn->connectpath,
2124 smb_fname,
2125 &old_write_time,
2126 &lck,
2127 &br_lck)) {
2128 return NT_STATUS_SHARING_VIOLATION;
2129 }
2130
2131 /* Get the types we need to examine. */
2132 find_oplock_types(fsp,
2133 oplock_request,
2134 lck,
2135 &batch_entry,
2136 &exclusive_entry,
2137 &got_level2_oplock,
2138 &got_a_none_oplock);
2139
2140 /* First pass - send break only on batch oplocks. */
2141 if ((req != NULL) &&
2142 delay_for_batch_oplocks(fsp,
2143 req->mid,
2144 oplock_request,
2145 batch_entry)) {
2146 schedule_defer_open(lck, request_time, req);
2147 TALLOC_FREE(lck);
2148 fd_close(fsp);
2149 return NT_STATUS_SHARING_VIOLATION;
2150 }
2151
2152 status = open_mode_check(conn, lck, fsp->name_hash,
2153 access_mask, share_access,
2154 create_options, &file_existed);
2155
2156 if (NT_STATUS_IS_OK(status)) {
2157 /* We might be going to allow this open. Check oplock
2158 * status again. */
2159 /* Second pass - send break for both batch or
2160 * exclusive oplocks. */
2161 if ((req != NULL) &&
2162 delay_for_exclusive_oplocks(
2163 fsp,
2164 req->mid,
2165 oplock_request,
2166 exclusive_entry)) {
2167 schedule_defer_open(lck, request_time, req);
2168 TALLOC_FREE(lck);
2169 fd_close(fsp);
2170 return NT_STATUS_SHARING_VIOLATION;
2171 }
2172 }
2173
2174 if (!NT_STATUS_IS_OK(status)) {
2175 struct deferred_open_record state;
2176
2177 fd_close(fsp);
2178
2179 state.delayed_for_oplocks = False;
2180 state.id = id;
2181
2182 /* Do it all over again immediately. In the second
2183 * round we will find that the file existed and handle
2184 * the DELETE_PENDING and FCB cases correctly. No need
2185 * to duplicate the code here. Essentially this is a
2186 * "goto top of this function", but don't tell
2187 * anybody... */
2188
2189 if (req != NULL) {
2190 defer_open(lck, request_time, timeval_zero(),
2191 req, &state);
2192 }
2193 TALLOC_FREE(lck);
2194 return status;
2195 }
2196
2197 grant_fsp_oplock_type(fsp,
2198 br_lck,
2199 oplock_request,
2200 got_level2_oplock,
2201 got_a_none_oplock);
2202
2203 /*
2204 * We exit this block with the share entry *locked*.....
2205 */
2206
2207 }
2208
2209 SMB_ASSERT(lck != NULL);
2210
2211 /* Delete streams if create_disposition requires it */
2212 if (file_existed && clear_ads &&
2213 !is_ntfs_stream_smb_fname(smb_fname)) {
2214 status = delete_all_streams(conn, smb_fname->base_name);
2215 if (!NT_STATUS_IS_OK(status)) {
2216 TALLOC_FREE(lck);
2217 fd_close(fsp);
2218 return status;
2219 }
2220 }
2221
2222 /* note that we ignore failure for the following. It is
2223 basically a hack for NFS, and NFS will never set one of
2224 these only read them. Nobody but Samba can ever set a deny
2225 mode and we have already checked our more authoritative
2226 locking database for permission to set this deny mode. If
2227 the kernel refuses the operations then the kernel is wrong.
2228 note that GPFS supports it as well - jmcd */
2229
2230 if (fsp->fh->fd != -1) {
2231 int ret_flock;
2232 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2233 if(ret_flock == -1 ){
2234
2235 TALLOC_FREE(lck);
2236 fd_close(fsp);
2237
2238 return NT_STATUS_SHARING_VIOLATION;
2239 }
2240 }
2241
2242 /*
2243 * At this point onwards, we can guarentee that the share entry
2244 * is locked, whether we created the file or not, and that the
2245 * deny mode is compatible with all current opens.
2246 */
2247
2248 /*
2249 * If requested, truncate the file.
2250 */
2251
2252 if (file_existed && (flags2&O_TRUNC)) {
2253 /*
2254 * We are modifing the file after open - update the stat
2255 * struct..
2256 */
2257 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2258 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2259 status = map_nt_error_from_unix(errno);
2260 TALLOC_FREE(lck);
2261 fd_close(fsp);
2262 return status;
2263 }
2264 }
2265
2266 /*
2267 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2268 * but we don't have to store this - just ignore it on access check.
2269 */
2270 if (conn->sconn->using_smb2) {
2271 /*
2272 * SMB2 doesn't return it (according to Microsoft tests).
2273 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2274 * File created with access = 0x7 (Read, Write, Delete)
2275 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2276 */
2277 fsp->access_mask = access_mask;
2278 } else {
2279 /* But SMB1 does. */
2280 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2281 }
2282
2283 if (file_existed) {
2284 /* stat opens on existing files don't get oplocks. */
2285 if (is_stat_open(open_access_mask)) {
2286 fsp->oplock_type = NO_OPLOCK;
2287 }
2288
2289 if (!(flags2 & O_TRUNC)) {
2290 info = FILE_WAS_OPENED;
2291 } else {
2292 info = FILE_WAS_OVERWRITTEN;
2293 }
2294 } else {
2295 info = FILE_WAS_CREATED;
2296 }
2297
2298 if (pinfo) {
2299 *pinfo = info;
2300 }
2301
2302 /*
2303 * Setup the oplock info in both the shared memory and
2304 * file structs.
2305 */
2306
2307 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2308 /*
2309 * Could not get the kernel oplock or there are byte-range
2310 * locks on the file.
2311 */
2312 fsp->oplock_type = NO_OPLOCK;
2313 }
2314
2315 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2316 new_file_created = True;
2317 }
2318
2319 set_share_mode(lck, fsp, get_current_uid(conn),
2320 req ? req->mid : 0,
2321 fsp->oplock_type);
2322
2323 /* Handle strange delete on close create semantics. */
2324 if (create_options & FILE_DELETE_ON_CLOSE) {
2325
2326 status = can_set_delete_on_close(fsp, new_dos_attributes);
2327
2328 if (!NT_STATUS_IS_OK(status)) {
2329 /* Remember to delete the mode we just added. */
2330 del_share_mode(lck, fsp);
2331 TALLOC_FREE(lck);
2332 fd_close(fsp);
2333 return status;
2334 }
2335 /* Note that here we set the *inital* delete on close flag,
2336 not the regular one. The magic gets handled in close. */
2337 fsp->initial_delete_on_close = True;
2338 }
2339
2340 if (new_file_created) {
2341 /* Files should be initially set as archive */
2342 if (lp_map_archive(SNUM(conn)) ||
2343 lp_store_dos_attributes(SNUM(conn))) {
2344 if (!posix_open) {
2345 if (file_set_dosmode(conn, smb_fname,
2346 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2347 parent_dir, true) == 0) {
2348 unx_mode = smb_fname->st.st_ex_mode;
2349 }
2350 }
2351 }
2352 }
2353
2354 /* Determine sparse flag. */
2355 if (posix_open) {
2356 /* POSIX opens are sparse by default. */
2357 fsp->is_sparse = true;
2358 } else {
2359 fsp->is_sparse = (file_existed &&
2360 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2361 }
2362
2363 /*
2364 * Take care of inherited ACLs on created files - if default ACL not
2365 * selected.
2366 */
2367
2368 if (!posix_open && !file_existed && !def_acl) {
2369
2370 int saved_errno = errno; /* We might get ENOSYS in the next
2371 * call.. */
2372
2373 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2374 errno == ENOSYS) {
2375 errno = saved_errno; /* Ignore ENOSYS */
2376 }
2377
2378 } else if (new_unx_mode) {
2379
2380 int ret = -1;
2381
2382 /* Attributes need changing. File already existed. */
2383
2384 {
2385 int saved_errno = errno; /* We might get ENOSYS in the
2386 * next call.. */
2387 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2388
2389 if (ret == -1 && errno == ENOSYS) {
2390 errno = saved_errno; /* Ignore ENOSYS */
2391 } else {
2392 DEBUG(5, ("open_file_ntcreate: reset "
2393 "attributes of file %s to 0%o\n",
2394 smb_fname_str_dbg(smb_fname),
2395 (unsigned int)new_unx_mode));
2396 ret = 0; /* Don't do the fchmod below. */
2397 }
2398 }
2399
2400 if ((ret == -1) &&
2401 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2402 DEBUG(5, ("open_file_ntcreate: failed to reset "
2403 "attributes of file %s to 0%o\n",
2404 smb_fname_str_dbg(smb_fname),
2405 (unsigned int)new_unx_mode));
2406 }
2407
2408 /* If this is a successful open, we must remove any deferred open
2409 * records. */
2410 if (req != NULL) {
2411 del_deferred_open_entry(lck, req->mid,
2412 sconn_server_id(req->sconn));
2413 }
2414 TALLOC_FREE(lck);
2415
2416 return NT_STATUS_OK;
2417 }
2418
2419
2420 /****************************************************************************
2421 Open a file for for write to ensure that we can fchmod it.
2422 ****************************************************************************/
2423
2424 NTSTATUS open_file_fchmod(connection_struct *conn,
2425 struct smb_filename *smb_fname,
2426 files_struct **result)
2427 {
2428 if (!VALID_STAT(smb_fname->st)) {
2429 return NT_STATUS_INVALID_PARAMETER;
2430 }
2431
2432 return SMB_VFS_CREATE_FILE(
2433 conn, /* conn */
2434 NULL, /* req */
2435 0, /* root_dir_fid */
2436 smb_fname, /* fname */
2437 FILE_WRITE_DATA, /* access_mask */
2438 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2439 FILE_SHARE_DELETE),
2440 FILE_OPEN, /* create_disposition*/
2441 0, /* create_options */
2442 0, /* file_attributes */
2443 INTERNAL_OPEN_ONLY, /* oplock_request */
2444 0, /* allocation_size */
2445 0, /* private_flags */
2446 NULL, /* sd */
2447 NULL, /* ea_list */
2448 result, /* result */
2449 NULL); /* pinfo */
2450 }
2451
2452 static NTSTATUS mkdir_internal(connection_struct *conn,
2453 struct smb_filename *smb_dname,
2454 uint32 file_attributes)
2455 {
2456 mode_t mode;
2457 char *parent_dir;
2458 NTSTATUS status;
2459 bool posix_open = false;
2460 bool need_re_stat = false;
2461
2462 if(!CAN_WRITE(conn)) {
2463 DEBUG(5,("mkdir_internal: failing create on read-only share "
2464 "%s\n", lp_servicename(SNUM(conn))));
2465 return NT_STATUS_ACCESS_DENIED;
2466 }
2467
2468 status = check_name(conn, smb_dname->base_name);
2469 if (!NT_STATUS_IS_OK(status)) {
2470 return status;
2471 }
2472
2473 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2474 NULL)) {
2475 return NT_STATUS_NO_MEMORY;
2476 }
2477
2478 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2479 posix_open = true;
2480 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2481 } else {
2482 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2483 }
2484
2485 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2486 return map_nt_error_from_unix(errno);
2487 }
2488
2489 /* Ensure we're checking for a symlink here.... */
2490 /* We don't want to get caught by a symlink racer. */
2491
2492 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2493 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2494 smb_fname_str_dbg(smb_dname), strerror(errno)));
2495 return map_nt_error_from_unix(errno);
2496 }
2497
2498 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2499 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2500 smb_fname_str_dbg(smb_dname)));
2501 return NT_STATUS_ACCESS_DENIED;
2502 }
2503
2504 if (lp_store_dos_attributes(SNUM(conn))) {
2505 if (!posix_open) {
2506 file_set_dosmode(conn, smb_dname,
2507 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2508 parent_dir, true);
2509 }
2510 }
2511
2512 if (lp_inherit_perms(SNUM(conn))) {
2513 inherit_access_posix_acl(conn, parent_dir,
2514 smb_dname->base_name, mode);
2515 need_re_stat = true;
2516 }
2517
2518 if (!posix_open) {
2519 /*
2520 * Check if high bits should have been set,
2521 * then (if bits are missing): add them.
2522 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2523 * dir.
2524 */
2525 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2526 (mode & ~smb_dname->st.st_ex_mode)) {
2527 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2528 (smb_dname->st.st_ex_mode |
2529 (mode & ~smb_dname->st.st_ex_mode)));
2530 need_re_stat = true;
2531 }
2532 }
2533
2534 /* Change the owner if required. */
2535 if (lp_inherit_owner(SNUM(conn))) {
2536 change_dir_owner_to_parent(conn, parent_dir,
2537 smb_dname->base_name,
2538 &smb_dname->st);
2539 need_re_stat = true;
2540 }
2541
2542 if (need_re_stat) {
2543 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2544 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2545 smb_fname_str_dbg(smb_dname), strerror(errno)));
2546 return map_nt_error_from_unix(errno);
2547 }
2548 }
2549
2550 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2551 smb_dname->base_name);
2552
2553 return NT_STATUS_OK;
2554 }
2555
2556 /****************************************************************************
2557 Ensure we didn't get symlink raced on opening a directory.
2558 ****************************************************************************/
2559
2560 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2561 const SMB_STRUCT_STAT *sbuf2)
2562 {
2563 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2564 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2565 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2566 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2567 return false;
2568 }
2569 return true;
2570 }
2571
2572 /****************************************************************************
2573 Open a directory from an NT SMB call.
2574 ****************************************************************************/
2575
2576 static NTSTATUS open_directory(connection_struct *conn,
2577 struct smb_request *req,
2578 struct smb_filename *smb_dname,
2579 uint32 access_mask,
2580 uint32 share_access,
2581 uint32 create_disposition,
2582 uint32 create_options,
2583 uint32 file_attributes,
2584 int *pinfo,
2585 files_struct **result)
2586 {
2587 files_struct *fsp = NULL;
2588 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2589 struct share_mode_lock *lck = NULL;
2590 NTSTATUS status;
2591 struct timespec mtimespec;
2592 int info = 0;
2593
2594 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2595
2596 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2597 /* Ensure we have a directory attribute. */
2598 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2599 }
2600
2601 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2602 "share_access = 0x%x create_options = 0x%x, "
2603 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2604 smb_fname_str_dbg(smb_dname),
2605 (unsigned int)access_mask,
2606 (unsigned int)share_access,
2607 (unsigned int)create_options,
2608 (unsigned int)create_disposition,
2609 (unsigned int)file_attributes));
2610
2611 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2612 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2613 is_ntfs_stream_smb_fname(smb_dname)) {
2614 DEBUG(2, ("open_directory: %s is a stream name!\n",
2615 smb_fname_str_dbg(smb_dname)));
2616 return NT_STATUS_NOT_A_DIRECTORY;
2617 }
2618
2619 status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2620 access_mask, &access_mask);
2621 if (!NT_STATUS_IS_OK(status)) {
2622 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2623 "on file %s returned %s\n",
2624 smb_fname_str_dbg(smb_dname),
2625 nt_errstr(status)));
2626 return status;
2627 }
2628
2629 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2630 !security_token_has_privilege(get_current_nttok(conn),
2631 SEC_PRIV_SECURITY)) {
2632 DEBUG(10, ("open_directory: open on %s "
2633 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2634 smb_fname_str_dbg(smb_dname)));
2635 return NT_STATUS_PRIVILEGE_NOT_HELD;
2636 }
2637
2638 switch( create_disposition ) {
2639 case FILE_OPEN:
2640
2641 if (!dir_existed) {
2642 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2643 }
2644
2645 info = FILE_WAS_OPENED;
2646 break;
2647
2648 case FILE_CREATE:
2649
2650 /* If directory exists error. If directory doesn't
2651 * exist create. */
2652
2653 status = mkdir_internal(conn, smb_dname,
2654 file_attributes);
2655
2656 if (!NT_STATUS_IS_OK(status)) {
2657 DEBUG(2, ("open_directory: unable to create "
2658 "%s. Error was %s\n",
2659 smb_fname_str_dbg(smb_dname),
2660 nt_errstr(status)));
2661 return status;
2662 }
2663
2664 info = FILE_WAS_CREATED;
2665 break;
2666
2667 case FILE_OPEN_IF:
2668 /*
2669 * If directory exists open. If directory doesn't
2670 * exist create.
2671 */
2672
2673 status = mkdir_internal(conn, smb_dname,
2674 file_attributes);
2675
2676 if (NT_STATUS_IS_OK(status)) {
2677 info = FILE_WAS_CREATED;
2678 }
2679
2680 if (NT_STATUS_EQUAL(status,
2681 NT_STATUS_OBJECT_NAME_COLLISION)) {
2682 info = FILE_WAS_OPENED;
2683 status = NT_STATUS_OK;
2684 }
2685 break;
2686
2687 case FILE_SUPERSEDE:
2688 case FILE_OVERWRITE:
2689 case FILE_OVERWRITE_IF:
2690 default:
2691 DEBUG(5,("open_directory: invalid create_disposition "
2692 "0x%x for directory %s\n",
2693 (unsigned int)create_disposition,
2694 smb_fname_str_dbg(smb_dname)));
2695 return NT_STATUS_INVALID_PARAMETER;
2696 }
2697
2698 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2699 DEBUG(5,("open_directory: %s is not a directory !\n",
2700 smb_fname_str_dbg(smb_dname)));
2701 return NT_STATUS_NOT_A_DIRECTORY;
2702 }
2703
2704 if (info == FILE_WAS_OPENED) {
2705 uint32_t access_granted = 0;
2706 status = smbd_check_open_rights(conn, smb_dname, access_mask,
2707 &access_granted);
2708
2709 /* Were we trying to do a directory open
2710 * for delete and didn't get DELETE
2711 * access (only) ? Check if the
2712 * directory allows DELETE_CHILD.
2713 * See here:
2714 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
2715 * for details. */
2716
2717 if ((NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
2718 (access_mask & DELETE_ACCESS) &&
2719 (access_granted == DELETE_ACCESS) &&
2720 can_delete_file_in_directory(conn, smb_dname))) {
2721 DEBUG(10,("open_directory: overrode ACCESS_DENIED "
2722 "on directory %s\n",
2723 smb_fname_str_dbg(smb_dname)));
2724 status = NT_STATUS_OK;
2725 }
2726
2727 if (!NT_STATUS_IS_OK(status)) {
2728 DEBUG(10, ("open_directory: smbd_check_open_rights on "
2729 "file %s failed with %s\n",
2730 smb_fname_str_dbg(smb_dname),
2731 nt_errstr(status)));
2732 return status;
2733 }
2734 }
2735
2736 status = file_new(req, conn, &fsp);
2737 if(!NT_STATUS_IS_OK(status)) {
2738 return status;
2739 }
2740
2741 /*
2742 * Setup the files_struct for it.
2743 */
2744
2745 fsp->mode = smb_dname->st.st_ex_mode;
2746 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2747 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2748 fsp->file_pid = req ? req->smbpid : 0;
2749 fsp->can_lock = False;
2750 fsp->can_read = False;
2751 fsp->can_write = False;
2752
2753 fsp->share_access = share_access;
2754 fsp->fh->private_options = 0;
2755 fsp->print_file = NULL;
2756 fsp->modified = False;
2757 fsp->oplock_type = NO_OPLOCK;
2758 fsp->sent_oplock_break = NO_BREAK_SENT;
2759 fsp->is_directory = True;
2760 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2761 status = fsp_set_smb_fname(fsp, smb_dname);
2762 if (!NT_STATUS_IS_OK(status)) {
2763 file_free(req, fsp);
2764 return status;
2765 }
2766
2767 mtimespec = smb_dname->st.st_ex_mtime;
2768
2769 fsp->access_mask = access_mask;
2770
2771 #ifdef O_DIRECTORY
2772 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2773 #else
2774 /* POSIX allows us to open a directory with O_RDONLY. */
2775 status = fd_open(conn, fsp, O_RDONLY, 0);
2776 #endif
2777 if (!NT_STATUS_IS_OK(status)) {
2778 DEBUG(5, ("open_directory: Could not open fd for "
2779 "%s (%s)\n",
2780 smb_fname_str_dbg(smb_dname),
2781 nt_errstr(status)));
2782 file_free(req, fsp);
2783 return status;
2784 }
2785
2786 /*
2787 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2788 * Set the real access mask for later access (possibly delete).
2789 */
2790 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2791
2792 status = vfs_stat_fsp(fsp);
2793 if (!NT_STATUS_IS_OK(status)) {
2794 fd_close(fsp);
2795 file_free(req, fsp);
2796 return status;
2797 }
2798
2799 /* Ensure there was no race condition. */
2800 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2801 DEBUG(5,("open_directory: stat struct differs for "
2802 "directory %s.\n",
2803 smb_fname_str_dbg(smb_dname)));
2804 fd_close(fsp);
2805 file_free(req, fsp);
2806 return NT_STATUS_ACCESS_DENIED;
2807 }
2808
2809 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2810 conn->connectpath, smb_dname, &mtimespec);
2811
2812 if (lck == NULL) {
2813 DEBUG(0, ("open_directory: Could not get share mode lock for "
2814 "%s\n", smb_fname_str_dbg(smb_dname)));
2815 fd_close(fsp);
2816 file_free(req, fsp);
2817 return NT_STATUS_SHARING_VIOLATION;
2818 }
2819
2820 status = open_mode_check(conn, lck, fsp->name_hash,
2821 access_mask, share_access,
2822 create_options, &dir_existed);
2823
2824 if (!NT_STATUS_IS_OK(status)) {
2825 TALLOC_FREE(lck);
2826 fd_close(fsp);
2827 file_free(req, fsp);
2828 return status;
2829 }
2830
2831 set_share_mode(lck, fsp, get_current_uid(conn),
2832 req ? req->mid : 0, NO_OPLOCK);
2833
2834 /* For directories the delete on close bit at open time seems
2835 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2836 if (create_options & FILE_DELETE_ON_CLOSE) {
2837 status = can_set_delete_on_close(fsp, 0);
2838 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2839 TALLOC_FREE(lck);
2840 fd_close(fsp);
2841 file_free(req, fsp);
2842 return status;
2843 }
2844
2845 if (NT_STATUS_IS_OK(status)) {
2846 /* Note that here we set the *inital* delete on close flag,
2847 not the regular one. The magic gets handled in close. */
2848 fsp->initial_delete_on_close = True;
2849 }
2850 }
2851
2852 TALLOC_FREE(lck);
2853
2854 if (pinfo) {
2855 *pinfo = info;
2856 }
2857
2858 *result = fsp;
2859 return NT_STATUS_OK;
2860 }
2861
2862 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2863 struct smb_filename *smb_dname)
2864 {
2865 NTSTATUS status;
2866 files_struct *fsp;
2867
2868 status = SMB_VFS_CREATE_FILE(
2869 conn, /* conn */
2870 req, /* req */
2871 0, /* root_dir_fid */
2872 smb_dname, /* fname */
2873 FILE_READ_ATTRIBUTES, /* access_mask */
2874 FILE_SHARE_NONE, /* share_access */
2875 FILE_CREATE, /* create_disposition*/
2876 FILE_DIRECTORY_FILE, /* create_options */
2877 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2878 0, /* oplock_request */
2879 0, /* allocation_size */
2880 0, /* private_flags */
2881 NULL, /* sd */
2882 NULL, /* ea_list */
2883 &fsp, /* result */
2884 NULL); /* pinfo */
2885
2886 if (NT_STATUS_IS_OK(status)) {
2887 close_file(req, fsp, NORMAL_CLOSE);
2888 }
2889
2890 return status;
2891 }
2892
2893 /****************************************************************************
2894 Receive notification that one of our open files has been renamed by another
2895 smbd process.
2896 ****************************************************************************/
2897
2898 void msg_file_was_renamed(struct messaging_context *msg,
2899 void *private_data,
2900 uint32_t msg_type,
2901 struct server_id server_id,
2902 DATA_BLOB *data)
2903 {
2904 struct smbd_server_connection *sconn;
2905 files_struct *fsp;
2906 char *frm = (char *)data->data;
2907 struct file_id id;
2908 const char *sharepath;
2909 const char *base_name;
2910 const char *stream_name;
2911 struct smb_filename *smb_fname = NULL;
2912 size_t sp_len, bn_len;
2913 NTSTATUS status;
2914
2915 sconn = msg_ctx_to_sconn(msg);
2916 if (sconn == NULL) {
2917 DEBUG(1, ("could not find sconn\n"));
2918 return;
2919 }
2920
2921 if (data->data == NULL
2922 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2923 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2924 (int)data->length));
2925 return;
2926 }
2927
2928 /* Unpack the message. */
2929 pull_file_id_24(frm, &id);
2930 sharepath = &frm[24];
2931 sp_len = strlen(sharepath);
2932 base_name = sharepath + sp_len + 1;
2933 bn_len = strlen(base_name);
2934 stream_name = sharepath + sp_len + 1 + bn_len + 1;
2935
2936 /* stream_name must always be NULL if there is no stream. */
2937 if (stream_name[0] == '\0') {
2938 stream_name = NULL;
2939 }
2940
2941 status = create_synthetic_smb_fname(talloc_tos(), base_name,
2942 stream_name, NULL, &smb_fname);
2943 if (!NT_STATUS_IS_OK(status)) {
2944 return;
2945 }
2946
2947 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2948 "file_id %s\n",
2949 sharepath, smb_fname_str_dbg(smb_fname),
2950 file_id_string_tos(&id)));
2951
2952 for(fsp = file_find_di_first(sconn, id); fsp;
2953 fsp = file_find_di_next(fsp)) {
2954 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2955
2956 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2957 fsp->fnum, fsp_str_dbg(fsp),
2958 smb_fname_str_dbg(smb_fname)));
2959 status = fsp_set_smb_fname(fsp, smb_fname);
2960 if (!NT_STATUS_IS_OK(status)) {
2961 goto out;
2962 }
2963 } else {
2964 /* TODO. JRA. */
2965 /* Now we have the complete path we can work out if this is
2966 actually within this share and adjust newname accordingly. */
2967 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2968 "not sharepath %s) "
2969 "fnum %d from %s -> %s\n",
2970 fsp->conn->connectpath,
2971 sharepath,
2972 fsp->fnum,
2973 fsp_str_dbg(fsp),
2974 smb_fname_str_dbg(smb_fname)));
2975 }
2976 }
2977 out:
2978 TALLOC_FREE(smb_fname);
2979 return;
2980 }
2981
2982 /*
2983 * If a main file is opened for delete, all streams need to be checked for
2984 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2985 * If that works, delete them all by setting the delete on close and close.
2986 */
2987
2988 NTSTATUS open_streams_for_delete(connection_struct *conn,
2989 const char *fname)
2990 {
2991 struct stream_struct *stream_info = NULL;
2992 files_struct **streams = NULL;
2993 int i;
2994 unsigned int num_streams = 0;
2995 TALLOC_CTX *frame = talloc_stackframe();
2996 NTSTATUS status;
2997
2998 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
2999 &num_streams, &stream_info);
3000
3001 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3002 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3003 DEBUG(10, ("no streams around\n"));
3004 TALLOC_FREE(frame);
3005 return NT_STATUS_OK;
3006 }
3007
3008 if (!NT_STATUS_IS_OK(status)) {
3009 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3010 nt_errstr(status)));
3011 goto fail;
3012 }
3013
3014 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3015 num_streams));
3016
3017 if (num_streams == 0) {
3018 TALLOC_FREE(frame);
3019 return NT_STATUS_OK;
3020 }
3021
3022 streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
3023 if (streams == NULL) {
3024 DEBUG(0, ("talloc failed\n"));
3025 status = NT_STATUS_NO_MEMORY;
3026 goto fail;
3027 }
3028
3029 for (i=0; i<num_streams; i++) {
3030 struct smb_filename *smb_fname = NULL;
3031
3032 if (strequal(stream_info[i].name, "::$DATA")) {
3033 streams[i] = NULL;
3034 continue;
3035 }
3036
3037 status = create_synthetic_smb_fname(talloc_tos(), fname,
3038 stream_info[i].name,
3039 NULL, &smb_fname);
3040 if (!NT_STATUS_IS_OK(status)) {
3041 goto fail;
3042 }
3043
3044 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3045 DEBUG(10, ("Unable to stat stream: %s\n",
3046 smb_fname_str_dbg(smb_fname)));
3047 }
3048
3049 status = SMB_VFS_CREATE_FILE(
3050 conn, /* conn */
3051 NULL, /* req */
3052 0, /* root_dir_fid */
3053 smb_fname, /* fname */
3054 DELETE_ACCESS, /* access_mask */
3055 (FILE_SHARE_READ | /* share_access */
3056 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3057 FILE_OPEN, /* create_disposition*/
3058 0, /* create_options */
3059 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3060 0, /* oplock_request */
3061 0, /* allocation_size */
3062 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3063 NULL, /* sd */
3064 NULL, /* ea_list */
3065 &streams[i], /* result */
3066 NULL); /* pinfo */
3067
3068 if (!NT_STATUS_IS_OK(status)) {
3069 DEBUG(10, ("Could not open stream %s: %s\n",
3070 smb_fname_str_dbg(smb_fname),
3071 nt_errstr(status)));
3072
3073 TALLOC_FREE(smb_fname);
3074 break;
3075 }
3076 TALLOC_FREE(smb_fname);
3077 }
3078
3079 /*
3080 * don't touch the variable "status" beyond this point :-)
3081 */
3082
3083 for (i -= 1 ; i >= 0; i--) {
3084 if (streams[i] == NULL) {
3085 continue;
3086 }
3087
3088 DEBUG(10, ("Closing stream # %d, %s\n", i,
3089 fsp_str_dbg(streams[i])));
3090 close_file(NULL, streams[i], NORMAL_CLOSE);
3091 }
3092
3093 fail:
3094 TALLOC_FREE(frame);
3095 return status;
3096 }
3097
3098 /*
3099 * Wrapper around open_file_ntcreate and open_directory
3100 */
3101
3102 static NTSTATUS create_file_unixpath(connection_struct *conn,
3103 struct smb_request *req,
3104 struct smb_filename *smb_fname,
3105 uint32_t access_mask,
3106 uint32_t share_access,
3107 uint32_t create_disposition,
3108 uint32_t create_options,
3109 uint32_t file_attributes,
3110 uint32_t oplock_request,
3111 uint64_t allocation_size,
3112 uint32_t private_flags,
3113 struct security_descriptor *sd,
3114 struct ea_list *ea_list,
3115
3116 files_struct **result,
3117 int *pinfo)
3118 {
3119 int info = FILE_WAS_OPENED;
3120 files_struct *base_fsp = NULL;
3121 files_struct *fsp = NULL;
3122 NTSTATUS status;
3123
3124 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3125 "file_attributes = 0x%x, share_access = 0x%x, "
3126 "create_disposition = 0x%x create_options = 0x%x "
3127 "oplock_request = 0x%x private_flags = 0x%x "
3128 "ea_list = 0x%p, sd = 0x%p, "
3129 "fname = %s\n",
3130 (unsigned int)access_mask,
3131 (unsigned int)file_attributes,
3132 (unsigned int)share_access,
3133 (unsigned int)create_disposition,
3134 (unsigned int)create_options,
3135 (unsigned int)oplock_request,
3136 (unsigned int)private_flags,
3137 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3138
3139 if (create_options & FILE_OPEN_BY_FILE_ID) {
3140 status = NT_STATUS_NOT_SUPPORTED;
3141 goto fail;
3142 }
3143
3144 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3145 status = NT_STATUS_INVALID_PARAMETER;
3146 goto fail;
3147 }
3148
3149 if (req == NULL) {
3150 oplock_request |= INTERNAL_OPEN_ONLY;
3151 }
3152
3153 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3154 && (access_mask & DELETE_ACCESS)
3155 && !is_ntfs_stream_smb_fname(smb_fname)) {
3156 /*
3157 * We can't open a file with DELETE access if any of the
3158 * streams is open without FILE_SHARE_DELETE
3159 */
3160 status = open_streams_for_delete(conn, smb_fname->base_name);
3161
3162 if (!NT_STATUS_IS_OK(status)) {
3163 goto fail;
3164 }
3165 }
3166
3167 /* This is the correct thing to do (check every time) but can_delete
3168 * is expensive (it may have to read the parent directory
3169 * permissions). So for now we're not doing it unless we have a strong
3170 * hint the client is really going to delete this file. If the client
3171 * is forcing FILE_CREATE let the filesystem take care of the
3172 * permissions. */
3173
3174 /* Setting FILE_SHARE_DELETE is the hint. */
3175
3176 if ((create_disposition != FILE_CREATE)
3177 && (access_mask & DELETE_ACCESS)
3178 && (!(can_delete_file_in_directory(conn, smb_fname) ||
3179 can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
3180 status = NT_STATUS_ACCESS_DENIED;
3181 DEBUG(10,("create_file_unixpath: open file %s "
3182 "for delete ACCESS_DENIED\n",
3183 smb_fname_str_dbg(smb_fname)));
3184 goto fail;
3185 }
3186
3187 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3188 !security_token_has_privilege(get_current_nttok(conn),
3189 SEC_PRIV_SECURITY)) {
3190 DEBUG(10, ("create_file_unixpath: open on %s "
3191 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3192 smb_fname_str_dbg(smb_fname)));
3193 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3194 goto fail;
3195 }
3196
3197 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3198 && is_ntfs_stream_smb_fname(smb_fname)
3199 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3200 uint32 base_create_disposition;
3201 struct smb_filename *smb_fname_base = NULL;
3202
3203 if (create_options & FILE_DIRECTORY_FILE) {
3204 status = NT_STATUS_NOT_A_DIRECTORY;
3205 goto fail;
3206 }
3207
3208 switch (create_disposition) {
3209 case FILE_OPEN:
3210 base_create_disposition = FILE_OPEN;
3211 break;
3212 default:
3213 base_create_disposition = FILE_OPEN_IF;
3214 break;
3215 }
3216
3217 /* Create an smb_filename with stream_name == NULL. */
3218 status = create_synthetic_smb_fname(talloc_tos(),
3219 smb_fname->base_name,
3220 NULL, NULL,
3221 &smb_fname_base);
3222 if (!NT_STATUS_IS_OK(status)) {
3223 goto fail;
3224 }
3225
3226 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3227 DEBUG(10, ("Unable to stat stream: %s\n",
3228 smb_fname_str_dbg(smb_fname_base)));
3229 }
3230
3231 /* Open the base file. */
3232 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3233 FILE_SHARE_READ
3234 | FILE_SHARE_WRITE
3235 | FILE_SHARE_DELETE,
3236 base_create_disposition,
3237 0, 0, 0, 0, 0, NULL, NULL,
3238 &base_fsp, NULL);
3239 TALLOC_FREE(smb_fname_base);
3240
3241 if (!NT_STATUS_IS_OK(status)) {
3242 DEBUG(10, ("create_file_unixpath for base %s failed: "
3243 "%s\n", smb_fname->base_name,
3244 nt_errstr(status)));
3245 goto fail;
3246 }
3247 /* we don't need to low level fd */
3248 fd_close(base_fsp);
3249 }
3250
3251 /*
3252 * If it's a request for a directory open, deal with it separately.
3253 */
3254
3255 if (create_options & FILE_DIRECTORY_FILE) {
3256
3257 if (create_options & FILE_NON_DIRECTORY_FILE) {
3258 status = NT_STATUS_INVALID_PARAMETER;
3259 goto fail;
3260 }
3261
3262 /* Can't open a temp directory. IFS kit test. */
3263 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3264 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3265 status = NT_STATUS_INVALID_PARAMETER;
3266 goto fail;
3267 }
3268
3269 /*
3270 * We will get a create directory here if the Win32
3271 * app specified a security descriptor in the
3272 * CreateDirectory() call.
3273 */
3274
3275 oplock_request = 0;
3276 status = open_directory(
3277 conn, req, smb_fname, access_mask, share_access,
3278 create_disposition, create_options, file_attributes,
3279 &info, &fsp);
3280 } else {
3281
3282 /*
3283 * Ordinary file case.
3284 */
3285
3286 status = file_new(req, conn, &fsp);
3287 if(!NT_STATUS_IS_OK(status)) {
3288 goto fail;
3289 }
3290
3291 status = fsp_set_smb_fname(fsp, smb_fname);
3292 if (!NT_STATUS_IS_OK(status)) {
3293 goto fail;
3294 }
3295
3296 /*
3297 * We're opening the stream element of a base_fsp
3298 * we already opened. Set up the base_fsp pointer.
3299 */
3300 if (base_fsp) {
3301 fsp->base_fsp = base_fsp;
3302 }
3303
3304 status = open_file_ntcreate(conn,
3305 req,
3306 access_mask,
3307 share_access,
3308 create_disposition,
3309 create_options,
3310 file_attributes,
3311 oplock_request,
3312 private_flags,
3313 &info,
3314 fsp);
3315
3316 if(!NT_STATUS_IS_OK(status)) {
3317 file_free(req, fsp);
3318 fsp = NULL;
3319 }
3320
3321 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3322
3323 /* A stream open never opens a directory */
3324
3325 if (base_fsp) {
3326 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3327 goto fail;
3328 }
3329
3330 /*
3331 * Fail the open if it was explicitly a non-directory
3332 * file.
3333 */
3334
3335 if (create_options & FILE_NON_DIRECTORY_FILE) {
3336 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3337 goto fail;
3338 }
3339
3340 oplock_request = 0;
3341 status = open_directory(
3342 conn, req, smb_fname, access_mask,
3343 share_access, create_disposition,
3344 create_options, file_attributes,
3345 &info, &fsp);
3346 }
3347 }
3348
3349 if (!NT_STATUS_IS_OK(status)) {
3350 goto fail;
3351 }
3352
3353 fsp->base_fsp = base_fsp;
3354
3355 /*
3356 * According to the MS documentation, the only time the security
3357 * descriptor is applied to the opened file is iff we *created* the
3358 * file; an existing file stays the same.
3359 *
3360 * Also, it seems (from observation) that you can open the file with
3361 * any access mask but you can still write the sd. We need to override
3362 * the granted access before we call set_sd
3363 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3364 */
3365
3366 if ((sd != NULL) && (info == FILE_WAS_CREATED)
3367 && lp_nt_acl_support(SNUM(conn))) {
3368
3369 uint32_t sec_info_sent;
3370 uint32_t saved_access_mask = fsp->access_mask;
3371
3372 sec_info_sent = get_sec_info(sd);
3373
3374 fsp->access_mask = FILE_GENERIC_ALL;
3375
3376 if (sec_info_sent & (SECINFO_OWNER|
3377 SECINFO_GROUP|
3378 SECINFO_DACL|
3379 SECINFO_SACL)) {
3380 status = set_sd(fsp, sd, sec_info_sent);
3381 }
3382
3383 fsp->access_mask = saved_access_mask;
3384
3385 if (!NT_STATUS_IS_OK(status)) {
3386 goto fail;
3387 }
3388 }
3389
3390 if ((ea_list != NULL) &&
3391 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3392 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3393 if (!NT_STATUS_IS_OK(status)) {
3394 goto fail;
3395 }
3396 }
3397
3398 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3399 status = NT_STATUS_ACCESS_DENIED;
3400 goto fail;
3401 }
3402
3403 /* Save the requested allocation size. */
3404 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3405 if (allocation_size
3406 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3407 fsp->initial_allocation_size = smb_roundup(
3408 fsp->conn, allocation_size);
3409 if (fsp->is_directory) {
3410 /* Can't set allocation size on a directory. */
3411 status = NT_STATUS_ACCESS_DENIED;
3412 goto fail;
3413 }
3414 if (vfs_allocate_file_space(
3415 fsp, fsp->initial_allocation_size) == -1) {
3416 status = NT_STATUS_DISK_FULL;
3417 goto fail;
3418 }
3419 } else {
3420 fsp->initial_allocation_size = smb_roundup(
3421 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3422 }
3423 }
3424
3425 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3426
3427 *result = fsp;
3428 if (pinfo != NULL) {
3429 *pinfo = info;
3430 }
3431
3432 smb_fname->st = fsp->fsp_name->st;
3433
3434 return NT_STATUS_OK;
3435
3436 fail:
3437 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3438
3439 if (fsp != NULL) {
3440 if (base_fsp && fsp->base_fsp == base_fsp) {
3441 /*
3442 * The close_file below will close
3443 * fsp->base_fsp.
3444 */
3445 base_fsp = NULL;
3446 }
3447 close_file(req, fsp, ERROR_CLOSE);
3448 fsp = NULL;
3449 }
3450 if (base_fsp != NULL) {
3451 close_file(req, base_fsp, ERROR_CLOSE);
3452 base_fsp = NULL;
3453 }
3454 return status;
3455 }
3456
3457 /*
3458 * Calculate the full path name given a relative fid.
3459 */
3460 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3461 struct smb_request *req,
3462 uint16_t root_dir_fid,
3463 const struct smb_filename *smb_fname,
3464 struct smb_filename **smb_fname_out)
3465 {
3466 files_struct *dir_fsp;
3467 char *parent_fname = NULL;
3468 char *new_base_name = NULL;
3469 NTSTATUS status;
3470
3471 if (root_dir_fid == 0 || !smb_fname) {
3472 status = NT_STATUS_INTERNAL_ERROR;
3473 goto out;
3474 }
3475
3476 dir_fsp = file_fsp(req, root_dir_fid);
3477
3478 if (dir_fsp == NULL) {
3479 status = NT_STATUS_INVALID_HANDLE;
3480 goto out;
3481 }
3482
3483 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3484 status = NT_STATUS_INVALID_HANDLE;
3485 goto out;
3486 }
3487
3488 if (!dir_fsp->is_directory) {
3489
3490 /*
3491 * Check to see if this is a mac fork of some kind.
3492 */
3493
3494 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3495 is_ntfs_stream_smb_fname(smb_fname)) {
3496 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3497 goto out;
3498 }
3499
3500 /*
3501 we need to handle the case when we get a
3502 relative open relative to a file and the
3503 pathname is blank - this is a reopen!
3504 (hint from demyn plantenberg)
3505 */
3506
3507 status = NT_STATUS_INVALID_HANDLE;
3508 goto out;
3509 }
3510
3511 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3512 /*
3513 * We're at the toplevel dir, the final file name
3514 * must not contain ./, as this is filtered out
3515 * normally by srvstr_get_path and unix_convert
3516 * explicitly rejects paths containing ./.
3517 */
3518 parent_fname = talloc_strdup(talloc_tos(), "");
3519 if (parent_fname == NULL) {
3520 status = NT_STATUS_NO_MEMORY;
3521 goto out;
3522 }
3523 } else {
3524 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3525
3526 /*
3527 * Copy in the base directory name.
3528 */
3529
3530 parent_fname = TALLOC_ARRAY(talloc_tos(), char,
3531 dir_name_len+2);
3532 if (parent_fname == NULL) {
3533 status = NT_STATUS_NO_MEMORY;
3534 goto out;
3535 }
3536 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3537 dir_name_len+1);
3538
3539 /*
3540 * Ensure it ends in a '/'.
3541 * We used TALLOC_SIZE +2 to add space for the '/'.
3542 */
3543
3544 if(dir_name_len
3545 && (parent_fname[dir_name_len-1] != '\\')
3546 && (parent_fname[dir_name_len-1] != '/')) {
3547 parent_fname[dir_name_len] = '/';
3548 parent_fname[dir_name_len+1] = '\0';
3549 }
3550 }
3551
3552 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3553 smb_fname->base_name);
3554 if (new_base_name == NULL) {
3555 status = NT_STATUS_NO_MEMORY;
3556 goto out;
3557 }
3558
3559 status = filename_convert(req,
3560 conn,
3561 req->flags2 & FLAGS2_DFS_PATHNAMES,
3562 new_base_name,
3563 0,
3564 NULL,
3565 smb_fname_out);
3566 if (!NT_STATUS_IS_OK(status)) {
3567 goto out;
3568 }
3569
3570 out:
3571 TALLOC_FREE(parent_fname);
3572 TALLOC_FREE(new_base_name);
3573 return status;
3574 }
3575
3576 NTSTATUS create_file_default(connection_struct *conn,
3577 struct smb_request *req,
3578 uint16_t root_dir_fid,
3579 struct smb_filename *smb_fname,
3580 uint32_t access_mask,
3581 uint32_t share_access,
3582 uint32_t create_disposition,
3583 uint32_t create_options,
3584 uint32_t file_attributes,
3585 uint32_t oplock_request,
3586 uint64_t allocation_size,
3587 uint32_t private_flags,
3588 struct security_descriptor *sd,
3589 struct ea_list *ea_list,
3590 files_struct **result,
3591 int *pinfo)
3592 {
3593 int info = FILE_WAS_OPENED;
3594 files_struct *fsp = NULL;
3595 NTSTATUS status;
3596 bool stream_name = false;
3597
3598 DEBUG(10,("create_file: access_mask = 0x%x "
3599 "file_attributes = 0x%x, share_access = 0x%x, "
3600 "create_disposition = 0x%x create_options = 0x%x "
3601 "oplock_request = 0x%x "
3602 "private_flags = 0x%x "
3603 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3604 "fname = %s\n",
3605 (unsigned int)access_mask,
3606 (unsigned int)file_attributes,
3607 (unsigned int)share_access,
3608 (unsigned int)create_disposition,
3609 (unsigned int)create_options,
3610 (unsigned int)oplock_request,
3611 (unsigned int)private_flags,
3612 (unsigned int)root_dir_fid,
3613 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3614
3615 /*
3616 * Calculate the filename from the root_dir_if if necessary.
3617 */
3618
3619 if (root_dir_fid != 0) {
3620 struct smb_filename *smb_fname_out = NULL;
3621 status = get_relative_fid_filename(conn, req, root_dir_fid,
3622 smb_fname, &smb_fname_out);
3623 if (!NT_STATUS_IS_OK(status)) {
3624 goto fail;
3625 }
3626 smb_fname = smb_fname_out;
3627 }
3628
3629 /*
3630 * Check to see if this is a mac fork of some kind.
3631 */
3632
3633 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3634 if (stream_name) {
3635 enum FAKE_FILE_TYPE fake_file_type;
3636
3637 fake_file_type = is_fake_file(smb_fname);
3638
3639 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3640
3641 /*
3642 * Here we go! support for changing the disk quotas
3643 * --metze
3644 *
3645 * We need to fake up to open this MAGIC QUOTA file
3646 * and return a valid FID.
3647 *
3648 * w2k close this file directly after openening xp
3649 * also tries a QUERY_FILE_INFO on the file and then
3650 * close it
3651 */
3652 status = open_fake_file(req, conn, req->vuid,
3653 fake_file_type, smb_fname,
3654 access_mask, &fsp);
3655 if (!NT_STATUS_IS_OK(status)) {
3656 goto fail;
3657 }
3658
3659 ZERO_STRUCT(smb_fname->st);
3660 goto done;
3661 }
3662
3663 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3664 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3665 goto fail;
3666 }
3667 }
3668
3669 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3670 int ret;
3671 smb_fname->stream_name = NULL;
3672 /* We have to handle this error here. */
3673 if (create_options & FILE_DIRECTORY_FILE) {
3674 status = NT_STATUS_NOT_A_DIRECTORY;
3675 goto fail;
3676 }
3677 if (lp_posix_pathnames()) {
3678 ret = SMB_VFS_LSTAT(conn, smb_fname);
3679 } else {
3680 ret = SMB_VFS_STAT(conn, smb_fname);
3681 }
3682
3683 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3684 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3685 goto fail;
3686 }
3687 }
3688
3689 status = create_file_unixpath(
3690 conn, req, smb_fname, access_mask, share_access,
3691 create_disposition, create_options, file_attributes,
3692 oplock_request, allocation_size, private_flags,
3693 sd, ea_list,
3694 &fsp, &info);
3695
3696 if (!NT_STATUS_IS_OK(status)) {
3697 goto fail;
3698 }
3699
3700 done:
3701 DEBUG(10, ("create_file: info=%d\n", info));
3702
3703 *result = fsp;
3704 if (pinfo != NULL) {
3705 *pinfo = info;
3706 }
3707 return NT_STATUS_OK;
3708
3709 fail:
3710 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3711
3712 if (fsp != NULL) {
3713 close_file(req, fsp, ERROR_CLOSE);
3714 fsp = NULL;
3715 }
3716 return status;
3717 }
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