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docs: Fix variable list in man vfs_crossrename.
[Samba.git] / source3 / smbd / open.c
blob447de808e4c3d5abb5462a4e0786504feb32901d
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 (SMB1 only).
2006 */
2007
2008 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2009 !conn->sconn->using_smb2 &&
2010 lp_defer_sharing_violations()) {
2011 struct timeval timeout;
2012 struct deferred_open_record state;
2013 int timeout_usecs;
2014
2015 /* this is a hack to speed up torture tests
2016 in 'make test' */
2017 timeout_usecs = lp_parm_int(SNUM(conn),
2018 "smbd","sharedelay",
2019 SHARING_VIOLATION_USEC_WAIT);
2020
2021 /* This is a relative time, added to the absolute
2022 request_time value to get the absolute timeout time.
2023 Note that if this is the second or greater time we enter
2024 this codepath for this particular request mid then
2025 request_time is left as the absolute time of the *first*
2026 time this request mid was processed. This is what allows
2027 the request to eventually time out. */
2028
2029 timeout = timeval_set(0, timeout_usecs);
2030
2031 /* Nothing actually uses state.delayed_for_oplocks
2032 but it's handy to differentiate in debug messages
2033 between a 30 second delay due to oplock break, and
2034 a 1 second delay for share mode conflicts. */
2035
2036 state.delayed_for_oplocks = False;
2037 state.id = id;
2038
2039 if ((req != NULL)
2040 && !request_timed_out(request_time,
2041 timeout)) {
2042 defer_open(lck, request_time, timeout,
2043 req, &state);
2044 }
2045 }
2046
2047 TALLOC_FREE(lck);
2048 if (can_access) {
2049 /*
2050 * We have detected a sharing violation here
2051 * so return the correct error code
2052 */
2053 status = NT_STATUS_SHARING_VIOLATION;
2054 } else {
2055 status = NT_STATUS_ACCESS_DENIED;
2056 }
2057 return status;
2058 }
2059
2060 /*
2061 * We exit this block with the share entry *locked*.....
2062 */
2063 }
2064
2065 SMB_ASSERT(!file_existed || (lck != NULL));
2066
2067 /*
2068 * Ensure we pay attention to default ACLs on directories if required.
2069 */
2070
2071 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2072 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2073 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2074 }
2075
2076 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2077 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2078 (unsigned int)flags, (unsigned int)flags2,
2079 (unsigned int)unx_mode, (unsigned int)access_mask,
2080 (unsigned int)open_access_mask));
2081
2082 /*
2083 * open_file strips any O_TRUNC flags itself.
2084 */
2085
2086 fsp_open = open_file(fsp, conn, req, parent_dir,
2087 flags|flags2, unx_mode, access_mask,
2088 open_access_mask);
2089
2090 if (!NT_STATUS_IS_OK(fsp_open)) {
2091 if (lck != NULL) {
2092 TALLOC_FREE(lck);
2093 }
2094 return fsp_open;
2095 }
2096
2097 if (!file_existed) {
2098 struct byte_range_lock *br_lck = NULL;
2099 struct share_mode_entry *batch_entry = NULL;
2100 struct share_mode_entry *exclusive_entry = NULL;
2101 bool got_level2_oplock = false;
2102 bool got_a_none_oplock = false;
2103 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2104 /*
2105 * Deal with the race condition where two smbd's detect the
2106 * file doesn't exist and do the create at the same time. One
2107 * of them will win and set a share mode, the other (ie. this
2108 * one) should check if the requested share mode for this
2109 * create is allowed.
2110 */
2111
2112 /*
2113 * Now the file exists and fsp is successfully opened,
2114 * fsp->dev and fsp->inode are valid and should replace the
2115 * dev=0,inode=0 from a non existent file. Spotted by
2116 * Nadav Danieli <nadavd@exanet.com>. JRA.
2117 */
2118
2119 id = fsp->file_id;
2120
2121 if (!acquire_ordered_locks(talloc_tos(),
2122 fsp,
2123 id,
2124 conn->connectpath,
2125 smb_fname,
2126 &old_write_time,
2127 &lck,
2128 &br_lck)) {
2129 return NT_STATUS_SHARING_VIOLATION;
2130 }
2131
2132 /* Get the types we need to examine. */
2133 find_oplock_types(fsp,
2134 oplock_request,
2135 lck,
2136 &batch_entry,
2137 &exclusive_entry,
2138 &got_level2_oplock,
2139 &got_a_none_oplock);
2140
2141 /* First pass - send break only on batch oplocks. */
2142 if ((req != NULL) &&
2143 delay_for_batch_oplocks(fsp,
2144 req->mid,
2145 oplock_request,
2146 batch_entry)) {
2147 schedule_defer_open(lck, request_time, req);
2148 TALLOC_FREE(lck);
2149 fd_close(fsp);
2150 return NT_STATUS_SHARING_VIOLATION;
2151 }
2152
2153 status = open_mode_check(conn, lck, fsp->name_hash,
2154 access_mask, share_access,
2155 create_options, &file_existed);
2156
2157 if (NT_STATUS_IS_OK(status)) {
2158 /* We might be going to allow this open. Check oplock
2159 * status again. */
2160 /* Second pass - send break for both batch or
2161 * exclusive oplocks. */
2162 if ((req != NULL) &&
2163 delay_for_exclusive_oplocks(
2164 fsp,
2165 req->mid,
2166 oplock_request,
2167 exclusive_entry)) {
2168 schedule_defer_open(lck, request_time, req);
2169 TALLOC_FREE(lck);
2170 fd_close(fsp);
2171 return NT_STATUS_SHARING_VIOLATION;
2172 }
2173 }
2174
2175 if (!NT_STATUS_IS_OK(status)) {
2176 struct deferred_open_record state;
2177
2178 fd_close(fsp);
2179
2180 state.delayed_for_oplocks = False;
2181 state.id = id;
2182
2183 /* Do it all over again immediately. In the second
2184 * round we will find that the file existed and handle
2185 * the DELETE_PENDING and FCB cases correctly. No need
2186 * to duplicate the code here. Essentially this is a
2187 * "goto top of this function", but don't tell
2188 * anybody... */
2189
2190 if (req != NULL) {
2191 defer_open(lck, request_time, timeval_zero(),
2192 req, &state);
2193 }
2194 TALLOC_FREE(lck);
2195 return status;
2196 }
2197
2198 grant_fsp_oplock_type(fsp,
2199 br_lck,
2200 oplock_request,
2201 got_level2_oplock,
2202 got_a_none_oplock);
2203
2204 /*
2205 * We exit this block with the share entry *locked*.....
2206 */
2207
2208 }
2209
2210 SMB_ASSERT(lck != NULL);
2211
2212 /* Delete streams if create_disposition requires it */
2213 if (file_existed && clear_ads &&
2214 !is_ntfs_stream_smb_fname(smb_fname)) {
2215 status = delete_all_streams(conn, smb_fname->base_name);
2216 if (!NT_STATUS_IS_OK(status)) {
2217 TALLOC_FREE(lck);
2218 fd_close(fsp);
2219 return status;
2220 }
2221 }
2222
2223 /* note that we ignore failure for the following. It is
2224 basically a hack for NFS, and NFS will never set one of
2225 these only read them. Nobody but Samba can ever set a deny
2226 mode and we have already checked our more authoritative
2227 locking database for permission to set this deny mode. If
2228 the kernel refuses the operations then the kernel is wrong.
2229 note that GPFS supports it as well - jmcd */
2230
2231 if (fsp->fh->fd != -1) {
2232 int ret_flock;
2233 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2234 if(ret_flock == -1 ){
2235
2236 TALLOC_FREE(lck);
2237 fd_close(fsp);
2238
2239 return NT_STATUS_SHARING_VIOLATION;
2240 }
2241 }
2242
2243 /*
2244 * At this point onwards, we can guarentee that the share entry
2245 * is locked, whether we created the file or not, and that the
2246 * deny mode is compatible with all current opens.
2247 */
2248
2249 /*
2250 * If requested, truncate the file.
2251 */
2252
2253 if (file_existed && (flags2&O_TRUNC)) {
2254 /*
2255 * We are modifing the file after open - update the stat
2256 * struct..
2257 */
2258 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2259 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2260 status = map_nt_error_from_unix(errno);
2261 TALLOC_FREE(lck);
2262 fd_close(fsp);
2263 return status;
2264 }
2265 }
2266
2267 /*
2268 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2269 * but we don't have to store this - just ignore it on access check.
2270 */
2271 if (conn->sconn->using_smb2) {
2272 /*
2273 * SMB2 doesn't return it (according to Microsoft tests).
2274 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2275 * File created with access = 0x7 (Read, Write, Delete)
2276 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2277 */
2278 fsp->access_mask = access_mask;
2279 } else {
2280 /* But SMB1 does. */
2281 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2282 }
2283
2284 if (file_existed) {
2285 /* stat opens on existing files don't get oplocks. */
2286 if (is_stat_open(open_access_mask)) {
2287 fsp->oplock_type = NO_OPLOCK;
2288 }
2289
2290 if (!(flags2 & O_TRUNC)) {
2291 info = FILE_WAS_OPENED;
2292 } else {
2293 info = FILE_WAS_OVERWRITTEN;
2294 }
2295 } else {
2296 info = FILE_WAS_CREATED;
2297 }
2298
2299 if (pinfo) {
2300 *pinfo = info;
2301 }
2302
2303 /*
2304 * Setup the oplock info in both the shared memory and
2305 * file structs.
2306 */
2307
2308 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2309 /*
2310 * Could not get the kernel oplock or there are byte-range
2311 * locks on the file.
2312 */
2313 fsp->oplock_type = NO_OPLOCK;
2314 }
2315
2316 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2317 new_file_created = True;
2318 }
2319
2320 set_share_mode(lck, fsp, get_current_uid(conn),
2321 req ? req->mid : 0,
2322 fsp->oplock_type);
2323
2324 /* Handle strange delete on close create semantics. */
2325 if (create_options & FILE_DELETE_ON_CLOSE) {
2326
2327 status = can_set_delete_on_close(fsp, new_dos_attributes);
2328
2329 if (!NT_STATUS_IS_OK(status)) {
2330 /* Remember to delete the mode we just added. */
2331 del_share_mode(lck, fsp);
2332 TALLOC_FREE(lck);
2333 fd_close(fsp);
2334 return status;
2335 }
2336 /* Note that here we set the *inital* delete on close flag,
2337 not the regular one. The magic gets handled in close. */
2338 fsp->initial_delete_on_close = True;
2339 }
2340
2341 if (new_file_created) {
2342 /* Files should be initially set as archive */
2343 if (lp_map_archive(SNUM(conn)) ||
2344 lp_store_dos_attributes(SNUM(conn))) {
2345 if (!posix_open) {
2346 if (file_set_dosmode(conn, smb_fname,
2347 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2348 parent_dir, true) == 0) {
2349 unx_mode = smb_fname->st.st_ex_mode;
2350 }
2351 }
2352 }
2353 }
2354
2355 /* Determine sparse flag. */
2356 if (posix_open) {
2357 /* POSIX opens are sparse by default. */
2358 fsp->is_sparse = true;
2359 } else {
2360 fsp->is_sparse = (file_existed &&
2361 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2362 }
2363
2364 /*
2365 * Take care of inherited ACLs on created files - if default ACL not
2366 * selected.
2367 */
2368
2369 if (!posix_open && !file_existed && !def_acl) {
2370
2371 int saved_errno = errno; /* We might get ENOSYS in the next
2372 * call.. */
2373
2374 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2375 errno == ENOSYS) {
2376 errno = saved_errno; /* Ignore ENOSYS */
2377 }
2378
2379 } else if (new_unx_mode) {
2380
2381 int ret = -1;
2382
2383 /* Attributes need changing. File already existed. */
2384
2385 {
2386 int saved_errno = errno; /* We might get ENOSYS in the
2387 * next call.. */
2388 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2389
2390 if (ret == -1 && errno == ENOSYS) {
2391 errno = saved_errno; /* Ignore ENOSYS */
2392 } else {
2393 DEBUG(5, ("open_file_ntcreate: reset "
2394 "attributes of file %s to 0%o\n",
2395 smb_fname_str_dbg(smb_fname),
2396 (unsigned int)new_unx_mode));
2397 ret = 0; /* Don't do the fchmod below. */
2398 }
2399 }
2400
2401 if ((ret == -1) &&
2402 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2403 DEBUG(5, ("open_file_ntcreate: failed to reset "
2404 "attributes of file %s to 0%o\n",
2405 smb_fname_str_dbg(smb_fname),
2406 (unsigned int)new_unx_mode));
2407 }
2408
2409 /* If this is a successful open, we must remove any deferred open
2410 * records. */
2411 if (req != NULL) {
2412 del_deferred_open_entry(lck, req->mid,
2413 sconn_server_id(req->sconn));
2414 }
2415 TALLOC_FREE(lck);
2416
2417 return NT_STATUS_OK;
2418 }
2419
2420
2421 /****************************************************************************
2422 Open a file for for write to ensure that we can fchmod it.
2423 ****************************************************************************/
2424
2425 NTSTATUS open_file_fchmod(connection_struct *conn,
2426 struct smb_filename *smb_fname,
2427 files_struct **result)
2428 {
2429 if (!VALID_STAT(smb_fname->st)) {
2430 return NT_STATUS_INVALID_PARAMETER;
2431 }
2432
2433 return SMB_VFS_CREATE_FILE(
2434 conn, /* conn */
2435 NULL, /* req */
2436 0, /* root_dir_fid */
2437 smb_fname, /* fname */
2438 FILE_WRITE_DATA, /* access_mask */
2439 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2440 FILE_SHARE_DELETE),
2441 FILE_OPEN, /* create_disposition*/
2442 0, /* create_options */
2443 0, /* file_attributes */
2444 INTERNAL_OPEN_ONLY, /* oplock_request */
2445 0, /* allocation_size */
2446 0, /* private_flags */
2447 NULL, /* sd */
2448 NULL, /* ea_list */
2449 result, /* result */
2450 NULL); /* pinfo */
2451 }
2452
2453 static NTSTATUS mkdir_internal(connection_struct *conn,
2454 struct smb_filename *smb_dname,
2455 uint32 file_attributes)
2456 {
2457 mode_t mode;
2458 char *parent_dir;
2459 NTSTATUS status;
2460 bool posix_open = false;
2461 bool need_re_stat = false;
2462
2463 if(!CAN_WRITE(conn)) {
2464 DEBUG(5,("mkdir_internal: failing create on read-only share "
2465 "%s\n", lp_servicename(SNUM(conn))));
2466 return NT_STATUS_ACCESS_DENIED;
2467 }
2468
2469 status = check_name(conn, smb_dname->base_name);
2470 if (!NT_STATUS_IS_OK(status)) {
2471 return status;
2472 }
2473
2474 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2475 NULL)) {
2476 return NT_STATUS_NO_MEMORY;
2477 }
2478
2479 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2480 posix_open = true;
2481 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2482 } else {
2483 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2484 }
2485
2486 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2487 return map_nt_error_from_unix(errno);
2488 }
2489
2490 /* Ensure we're checking for a symlink here.... */
2491 /* We don't want to get caught by a symlink racer. */
2492
2493 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2494 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2495 smb_fname_str_dbg(smb_dname), strerror(errno)));
2496 return map_nt_error_from_unix(errno);
2497 }
2498
2499 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2500 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2501 smb_fname_str_dbg(smb_dname)));
2502 return NT_STATUS_ACCESS_DENIED;
2503 }
2504
2505 if (lp_store_dos_attributes(SNUM(conn))) {
2506 if (!posix_open) {
2507 file_set_dosmode(conn, smb_dname,
2508 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2509 parent_dir, true);
2510 }
2511 }
2512
2513 if (lp_inherit_perms(SNUM(conn))) {
2514 inherit_access_posix_acl(conn, parent_dir,
2515 smb_dname->base_name, mode);
2516 need_re_stat = true;
2517 }
2518
2519 if (!posix_open) {
2520 /*
2521 * Check if high bits should have been set,
2522 * then (if bits are missing): add them.
2523 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2524 * dir.
2525 */
2526 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2527 (mode & ~smb_dname->st.st_ex_mode)) {
2528 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2529 (smb_dname->st.st_ex_mode |
2530 (mode & ~smb_dname->st.st_ex_mode)));
2531 need_re_stat = true;
2532 }
2533 }
2534
2535 /* Change the owner if required. */
2536 if (lp_inherit_owner(SNUM(conn))) {
2537 change_dir_owner_to_parent(conn, parent_dir,
2538 smb_dname->base_name,
2539 &smb_dname->st);
2540 need_re_stat = true;
2541 }
2542
2543 if (need_re_stat) {
2544 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2545 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2546 smb_fname_str_dbg(smb_dname), strerror(errno)));
2547 return map_nt_error_from_unix(errno);
2548 }
2549 }
2550
2551 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2552 smb_dname->base_name);
2553
2554 return NT_STATUS_OK;
2555 }
2556
2557 /****************************************************************************
2558 Ensure we didn't get symlink raced on opening a directory.
2559 ****************************************************************************/
2560
2561 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2562 const SMB_STRUCT_STAT *sbuf2)
2563 {
2564 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2565 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2566 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2567 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2568 return false;
2569 }
2570 return true;
2571 }
2572
2573 /****************************************************************************
2574 Open a directory from an NT SMB call.
2575 ****************************************************************************/
2576
2577 static NTSTATUS open_directory(connection_struct *conn,
2578 struct smb_request *req,
2579 struct smb_filename *smb_dname,
2580 uint32 access_mask,
2581 uint32 share_access,
2582 uint32 create_disposition,
2583 uint32 create_options,
2584 uint32 file_attributes,
2585 int *pinfo,
2586 files_struct **result)
2587 {
2588 files_struct *fsp = NULL;
2589 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2590 struct share_mode_lock *lck = NULL;
2591 NTSTATUS status;
2592 struct timespec mtimespec;
2593 int info = 0;
2594
2595 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2596
2597 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2598 /* Ensure we have a directory attribute. */
2599 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2600 }
2601
2602 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2603 "share_access = 0x%x create_options = 0x%x, "
2604 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2605 smb_fname_str_dbg(smb_dname),
2606 (unsigned int)access_mask,
2607 (unsigned int)share_access,
2608 (unsigned int)create_options,
2609 (unsigned int)create_disposition,
2610 (unsigned int)file_attributes));
2611
2612 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2613 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2614 is_ntfs_stream_smb_fname(smb_dname)) {
2615 DEBUG(2, ("open_directory: %s is a stream name!\n",
2616 smb_fname_str_dbg(smb_dname)));
2617 return NT_STATUS_NOT_A_DIRECTORY;
2618 }
2619
2620 status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2621 access_mask, &access_mask);
2622 if (!NT_STATUS_IS_OK(status)) {
2623 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2624 "on file %s returned %s\n",
2625 smb_fname_str_dbg(smb_dname),
2626 nt_errstr(status)));
2627 return status;
2628 }
2629
2630 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2631 !security_token_has_privilege(get_current_nttok(conn),
2632 SEC_PRIV_SECURITY)) {
2633 DEBUG(10, ("open_directory: open on %s "
2634 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2635 smb_fname_str_dbg(smb_dname)));
2636 return NT_STATUS_PRIVILEGE_NOT_HELD;
2637 }
2638
2639 switch( create_disposition ) {
2640 case FILE_OPEN:
2641
2642 if (!dir_existed) {
2643 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2644 }
2645
2646 info = FILE_WAS_OPENED;
2647 break;
2648
2649 case FILE_CREATE:
2650
2651 /* If directory exists error. If directory doesn't
2652 * exist create. */
2653
2654 status = mkdir_internal(conn, smb_dname,
2655 file_attributes);
2656
2657 if (!NT_STATUS_IS_OK(status)) {
2658 DEBUG(2, ("open_directory: unable to create "
2659 "%s. Error was %s\n",
2660 smb_fname_str_dbg(smb_dname),
2661 nt_errstr(status)));
2662 return status;
2663 }
2664
2665 info = FILE_WAS_CREATED;
2666 break;
2667
2668 case FILE_OPEN_IF:
2669 /*
2670 * If directory exists open. If directory doesn't
2671 * exist create.
2672 */
2673
2674 status = mkdir_internal(conn, smb_dname,
2675 file_attributes);
2676
2677 if (NT_STATUS_IS_OK(status)) {
2678 info = FILE_WAS_CREATED;
2679 }
2680
2681 if (NT_STATUS_EQUAL(status,
2682 NT_STATUS_OBJECT_NAME_COLLISION)) {
2683 info = FILE_WAS_OPENED;
2684 status = NT_STATUS_OK;
2685 }
2686 break;
2687
2688 case FILE_SUPERSEDE:
2689 case FILE_OVERWRITE:
2690 case FILE_OVERWRITE_IF:
2691 default:
2692 DEBUG(5,("open_directory: invalid create_disposition "
2693 "0x%x for directory %s\n",
2694 (unsigned int)create_disposition,
2695 smb_fname_str_dbg(smb_dname)));
2696 return NT_STATUS_INVALID_PARAMETER;
2697 }
2698
2699 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2700 DEBUG(5,("open_directory: %s is not a directory !\n",
2701 smb_fname_str_dbg(smb_dname)));
2702 return NT_STATUS_NOT_A_DIRECTORY;
2703 }
2704
2705 if (info == FILE_WAS_OPENED) {
2706 uint32_t access_granted = 0;
2707 status = smbd_check_open_rights(conn, smb_dname, access_mask,
2708 &access_granted);
2709
2710 /* Were we trying to do a directory open
2711 * for delete and didn't get DELETE
2712 * access (only) ? Check if the
2713 * directory allows DELETE_CHILD.
2714 * See here:
2715 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
2716 * for details. */
2717
2718 if ((NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED) &&
2719 (access_mask & DELETE_ACCESS) &&
2720 (access_granted == DELETE_ACCESS) &&
2721 can_delete_file_in_directory(conn, smb_dname))) {
2722 DEBUG(10,("open_directory: overrode ACCESS_DENIED "
2723 "on directory %s\n",
2724 smb_fname_str_dbg(smb_dname)));
2725 status = NT_STATUS_OK;
2726 }
2727
2728 if (!NT_STATUS_IS_OK(status)) {
2729 DEBUG(10, ("open_directory: smbd_check_open_rights on "
2730 "file %s failed with %s\n",
2731 smb_fname_str_dbg(smb_dname),
2732 nt_errstr(status)));
2733 return status;
2734 }
2735 }
2736
2737 status = file_new(req, conn, &fsp);
2738 if(!NT_STATUS_IS_OK(status)) {
2739 return status;
2740 }
2741
2742 /*
2743 * Setup the files_struct for it.
2744 */
2745
2746 fsp->mode = smb_dname->st.st_ex_mode;
2747 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2748 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2749 fsp->file_pid = req ? req->smbpid : 0;
2750 fsp->can_lock = False;
2751 fsp->can_read = False;
2752 fsp->can_write = False;
2753
2754 fsp->share_access = share_access;
2755 fsp->fh->private_options = 0;
2756 fsp->print_file = NULL;
2757 fsp->modified = False;
2758 fsp->oplock_type = NO_OPLOCK;
2759 fsp->sent_oplock_break = NO_BREAK_SENT;
2760 fsp->is_directory = True;
2761 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2762 status = fsp_set_smb_fname(fsp, smb_dname);
2763 if (!NT_STATUS_IS_OK(status)) {
2764 file_free(req, fsp);
2765 return status;
2766 }
2767
2768 mtimespec = smb_dname->st.st_ex_mtime;
2769
2770 fsp->access_mask = access_mask;
2771
2772 #ifdef O_DIRECTORY
2773 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2774 #else
2775 /* POSIX allows us to open a directory with O_RDONLY. */
2776 status = fd_open(conn, fsp, O_RDONLY, 0);
2777 #endif
2778 if (!NT_STATUS_IS_OK(status)) {
2779 DEBUG(5, ("open_directory: Could not open fd for "
2780 "%s (%s)\n",
2781 smb_fname_str_dbg(smb_dname),
2782 nt_errstr(status)));
2783 file_free(req, fsp);
2784 return status;
2785 }
2786
2787 /*
2788 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2789 * Set the real access mask for later access (possibly delete).
2790 */
2791 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2792
2793 status = vfs_stat_fsp(fsp);
2794 if (!NT_STATUS_IS_OK(status)) {
2795 fd_close(fsp);
2796 file_free(req, fsp);
2797 return status;
2798 }
2799
2800 /* Ensure there was no race condition. */
2801 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2802 DEBUG(5,("open_directory: stat struct differs for "
2803 "directory %s.\n",
2804 smb_fname_str_dbg(smb_dname)));
2805 fd_close(fsp);
2806 file_free(req, fsp);
2807 return NT_STATUS_ACCESS_DENIED;
2808 }
2809
2810 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2811 conn->connectpath, smb_dname, &mtimespec);
2812
2813 if (lck == NULL) {
2814 DEBUG(0, ("open_directory: Could not get share mode lock for "
2815 "%s\n", smb_fname_str_dbg(smb_dname)));
2816 fd_close(fsp);
2817 file_free(req, fsp);
2818 return NT_STATUS_SHARING_VIOLATION;
2819 }
2820
2821 status = open_mode_check(conn, lck, fsp->name_hash,
2822 access_mask, share_access,
2823 create_options, &dir_existed);
2824
2825 if (!NT_STATUS_IS_OK(status)) {
2826 TALLOC_FREE(lck);
2827 fd_close(fsp);
2828 file_free(req, fsp);
2829 return status;
2830 }
2831
2832 set_share_mode(lck, fsp, get_current_uid(conn),
2833 req ? req->mid : 0, NO_OPLOCK);
2834
2835 /* For directories the delete on close bit at open time seems
2836 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2837 if (create_options & FILE_DELETE_ON_CLOSE) {
2838 status = can_set_delete_on_close(fsp, 0);
2839 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2840 TALLOC_FREE(lck);
2841 fd_close(fsp);
2842 file_free(req, fsp);
2843 return status;
2844 }
2845
2846 if (NT_STATUS_IS_OK(status)) {
2847 /* Note that here we set the *inital* delete on close flag,
2848 not the regular one. The magic gets handled in close. */
2849 fsp->initial_delete_on_close = True;
2850 }
2851 }
2852
2853 TALLOC_FREE(lck);
2854
2855 if (pinfo) {
2856 *pinfo = info;
2857 }
2858
2859 *result = fsp;
2860 return NT_STATUS_OK;
2861 }
2862
2863 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2864 struct smb_filename *smb_dname)
2865 {
2866 NTSTATUS status;
2867 files_struct *fsp;
2868
2869 status = SMB_VFS_CREATE_FILE(
2870 conn, /* conn */
2871 req, /* req */
2872 0, /* root_dir_fid */
2873 smb_dname, /* fname */
2874 FILE_READ_ATTRIBUTES, /* access_mask */
2875 FILE_SHARE_NONE, /* share_access */
2876 FILE_CREATE, /* create_disposition*/
2877 FILE_DIRECTORY_FILE, /* create_options */
2878 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2879 0, /* oplock_request */
2880 0, /* allocation_size */
2881 0, /* private_flags */
2882 NULL, /* sd */
2883 NULL, /* ea_list */
2884 &fsp, /* result */
2885 NULL); /* pinfo */
2886
2887 if (NT_STATUS_IS_OK(status)) {
2888 close_file(req, fsp, NORMAL_CLOSE);
2889 }
2890
2891 return status;
2892 }
2893
2894 /****************************************************************************
2895 Receive notification that one of our open files has been renamed by another
2896 smbd process.
2897 ****************************************************************************/
2898
2899 void msg_file_was_renamed(struct messaging_context *msg,
2900 void *private_data,
2901 uint32_t msg_type,
2902 struct server_id server_id,
2903 DATA_BLOB *data)
2904 {
2905 struct smbd_server_connection *sconn;
2906 files_struct *fsp;
2907 char *frm = (char *)data->data;
2908 struct file_id id;
2909 const char *sharepath;
2910 const char *base_name;
2911 const char *stream_name;
2912 struct smb_filename *smb_fname = NULL;
2913 size_t sp_len, bn_len;
2914 NTSTATUS status;
2915
2916 sconn = msg_ctx_to_sconn(msg);
2917 if (sconn == NULL) {
2918 DEBUG(1, ("could not find sconn\n"));
2919 return;
2920 }
2921
2922 if (data->data == NULL
2923 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2924 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2925 (int)data->length));
2926 return;
2927 }
2928
2929 /* Unpack the message. */
2930 pull_file_id_24(frm, &id);
2931 sharepath = &frm[24];
2932 sp_len = strlen(sharepath);
2933 base_name = sharepath + sp_len + 1;
2934 bn_len = strlen(base_name);
2935 stream_name = sharepath + sp_len + 1 + bn_len + 1;
2936
2937 /* stream_name must always be NULL if there is no stream. */
2938 if (stream_name[0] == '\0') {
2939 stream_name = NULL;
2940 }
2941
2942 status = create_synthetic_smb_fname(talloc_tos(), base_name,
2943 stream_name, NULL, &smb_fname);
2944 if (!NT_STATUS_IS_OK(status)) {
2945 return;
2946 }
2947
2948 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2949 "file_id %s\n",
2950 sharepath, smb_fname_str_dbg(smb_fname),
2951 file_id_string_tos(&id)));
2952
2953 for(fsp = file_find_di_first(sconn, id); fsp;
2954 fsp = file_find_di_next(fsp)) {
2955 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2956
2957 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2958 fsp->fnum, fsp_str_dbg(fsp),
2959 smb_fname_str_dbg(smb_fname)));
2960 status = fsp_set_smb_fname(fsp, smb_fname);
2961 if (!NT_STATUS_IS_OK(status)) {
2962 goto out;
2963 }
2964 } else {
2965 /* TODO. JRA. */
2966 /* Now we have the complete path we can work out if this is
2967 actually within this share and adjust newname accordingly. */
2968 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2969 "not sharepath %s) "
2970 "fnum %d from %s -> %s\n",
2971 fsp->conn->connectpath,
2972 sharepath,
2973 fsp->fnum,
2974 fsp_str_dbg(fsp),
2975 smb_fname_str_dbg(smb_fname)));
2976 }
2977 }
2978 out:
2979 TALLOC_FREE(smb_fname);
2980 return;
2981 }
2982
2983 /*
2984 * If a main file is opened for delete, all streams need to be checked for
2985 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2986 * If that works, delete them all by setting the delete on close and close.
2987 */
2988
2989 NTSTATUS open_streams_for_delete(connection_struct *conn,
2990 const char *fname)
2991 {
2992 struct stream_struct *stream_info = NULL;
2993 files_struct **streams = NULL;
2994 int i;
2995 unsigned int num_streams = 0;
2996 TALLOC_CTX *frame = talloc_stackframe();
2997 NTSTATUS status;
2998
2999 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3000 &num_streams, &stream_info);
3001
3002 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3003 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3004 DEBUG(10, ("no streams around\n"));
3005 TALLOC_FREE(frame);
3006 return NT_STATUS_OK;
3007 }
3008
3009 if (!NT_STATUS_IS_OK(status)) {
3010 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3011 nt_errstr(status)));
3012 goto fail;
3013 }
3014
3015 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3016 num_streams));
3017
3018 if (num_streams == 0) {
3019 TALLOC_FREE(frame);
3020 return NT_STATUS_OK;
3021 }
3022
3023 streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
3024 if (streams == NULL) {
3025 DEBUG(0, ("talloc failed\n"));
3026 status = NT_STATUS_NO_MEMORY;
3027 goto fail;
3028 }
3029
3030 for (i=0; i<num_streams; i++) {
3031 struct smb_filename *smb_fname = NULL;
3032
3033 if (strequal(stream_info[i].name, "::$DATA")) {
3034 streams[i] = NULL;
3035 continue;
3036 }
3037
3038 status = create_synthetic_smb_fname(talloc_tos(), fname,
3039 stream_info[i].name,
3040 NULL, &smb_fname);
3041 if (!NT_STATUS_IS_OK(status)) {
3042 goto fail;
3043 }
3044
3045 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3046 DEBUG(10, ("Unable to stat stream: %s\n",
3047 smb_fname_str_dbg(smb_fname)));
3048 }
3049
3050 status = SMB_VFS_CREATE_FILE(
3051 conn, /* conn */
3052 NULL, /* req */
3053 0, /* root_dir_fid */
3054 smb_fname, /* fname */
3055 DELETE_ACCESS, /* access_mask */
3056 (FILE_SHARE_READ | /* share_access */
3057 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3058 FILE_OPEN, /* create_disposition*/
3059 0, /* create_options */
3060 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3061 0, /* oplock_request */
3062 0, /* allocation_size */
3063 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3064 NULL, /* sd */
3065 NULL, /* ea_list */
3066 &streams[i], /* result */
3067 NULL); /* pinfo */
3068
3069 if (!NT_STATUS_IS_OK(status)) {
3070 DEBUG(10, ("Could not open stream %s: %s\n",
3071 smb_fname_str_dbg(smb_fname),
3072 nt_errstr(status)));
3073
3074 TALLOC_FREE(smb_fname);
3075 break;
3076 }
3077 TALLOC_FREE(smb_fname);
3078 }
3079
3080 /*
3081 * don't touch the variable "status" beyond this point :-)
3082 */
3083
3084 for (i -= 1 ; i >= 0; i--) {
3085 if (streams[i] == NULL) {
3086 continue;
3087 }
3088
3089 DEBUG(10, ("Closing stream # %d, %s\n", i,
3090 fsp_str_dbg(streams[i])));
3091 close_file(NULL, streams[i], NORMAL_CLOSE);
3092 }
3093
3094 fail:
3095 TALLOC_FREE(frame);
3096 return status;
3097 }
3098
3099 /*
3100 * Wrapper around open_file_ntcreate and open_directory
3101 */
3102
3103 static NTSTATUS create_file_unixpath(connection_struct *conn,
3104 struct smb_request *req,
3105 struct smb_filename *smb_fname,
3106 uint32_t access_mask,
3107 uint32_t share_access,
3108 uint32_t create_disposition,
3109 uint32_t create_options,
3110 uint32_t file_attributes,
3111 uint32_t oplock_request,
3112 uint64_t allocation_size,
3113 uint32_t private_flags,
3114 struct security_descriptor *sd,
3115 struct ea_list *ea_list,
3116
3117 files_struct **result,
3118 int *pinfo)
3119 {
3120 int info = FILE_WAS_OPENED;
3121 files_struct *base_fsp = NULL;
3122 files_struct *fsp = NULL;
3123 NTSTATUS status;
3124
3125 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3126 "file_attributes = 0x%x, share_access = 0x%x, "
3127 "create_disposition = 0x%x create_options = 0x%x "
3128 "oplock_request = 0x%x private_flags = 0x%x "
3129 "ea_list = 0x%p, sd = 0x%p, "
3130 "fname = %s\n",
3131 (unsigned int)access_mask,
3132 (unsigned int)file_attributes,
3133 (unsigned int)share_access,
3134 (unsigned int)create_disposition,
3135 (unsigned int)create_options,
3136 (unsigned int)oplock_request,
3137 (unsigned int)private_flags,
3138 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3139
3140 if (create_options & FILE_OPEN_BY_FILE_ID) {
3141 status = NT_STATUS_NOT_SUPPORTED;
3142 goto fail;
3143 }
3144
3145 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3146 status = NT_STATUS_INVALID_PARAMETER;
3147 goto fail;
3148 }
3149
3150 if (req == NULL) {
3151 oplock_request |= INTERNAL_OPEN_ONLY;
3152 }
3153
3154 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3155 && (access_mask & DELETE_ACCESS)
3156 && !is_ntfs_stream_smb_fname(smb_fname)) {
3157 /*
3158 * We can't open a file with DELETE access if any of the
3159 * streams is open without FILE_SHARE_DELETE
3160 */
3161 status = open_streams_for_delete(conn, smb_fname->base_name);
3162
3163 if (!NT_STATUS_IS_OK(status)) {
3164 goto fail;
3165 }
3166 }
3167
3168 /* This is the correct thing to do (check every time) but can_delete
3169 * is expensive (it may have to read the parent directory
3170 * permissions). So for now we're not doing it unless we have a strong
3171 * hint the client is really going to delete this file. If the client
3172 * is forcing FILE_CREATE let the filesystem take care of the
3173 * permissions. */
3174
3175 /* Setting FILE_SHARE_DELETE is the hint. */
3176
3177 if ((create_disposition != FILE_CREATE)
3178 && (access_mask & DELETE_ACCESS)
3179 && (!(can_delete_file_in_directory(conn, smb_fname) ||
3180 can_access_file_acl(conn, smb_fname, DELETE_ACCESS)))) {
3181 status = NT_STATUS_ACCESS_DENIED;
3182 DEBUG(10,("create_file_unixpath: open file %s "
3183 "for delete ACCESS_DENIED\n",
3184 smb_fname_str_dbg(smb_fname)));
3185 goto fail;
3186 }
3187
3188 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3189 !security_token_has_privilege(get_current_nttok(conn),
3190 SEC_PRIV_SECURITY)) {
3191 DEBUG(10, ("create_file_unixpath: open on %s "
3192 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3193 smb_fname_str_dbg(smb_fname)));
3194 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3195 goto fail;
3196 }
3197
3198 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3199 && is_ntfs_stream_smb_fname(smb_fname)
3200 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3201 uint32 base_create_disposition;
3202 struct smb_filename *smb_fname_base = NULL;
3203
3204 if (create_options & FILE_DIRECTORY_FILE) {
3205 status = NT_STATUS_NOT_A_DIRECTORY;
3206 goto fail;
3207 }
3208
3209 switch (create_disposition) {
3210 case FILE_OPEN:
3211 base_create_disposition = FILE_OPEN;
3212 break;
3213 default:
3214 base_create_disposition = FILE_OPEN_IF;
3215 break;
3216 }
3217
3218 /* Create an smb_filename with stream_name == NULL. */
3219 status = create_synthetic_smb_fname(talloc_tos(),
3220 smb_fname->base_name,
3221 NULL, NULL,
3222 &smb_fname_base);
3223 if (!NT_STATUS_IS_OK(status)) {
3224 goto fail;
3225 }
3226
3227 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3228 DEBUG(10, ("Unable to stat stream: %s\n",
3229 smb_fname_str_dbg(smb_fname_base)));
3230 }
3231
3232 /* Open the base file. */
3233 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3234 FILE_SHARE_READ
3235 | FILE_SHARE_WRITE
3236 | FILE_SHARE_DELETE,
3237 base_create_disposition,
3238 0, 0, 0, 0, 0, NULL, NULL,
3239 &base_fsp, NULL);
3240 TALLOC_FREE(smb_fname_base);
3241
3242 if (!NT_STATUS_IS_OK(status)) {
3243 DEBUG(10, ("create_file_unixpath for base %s failed: "
3244 "%s\n", smb_fname->base_name,
3245 nt_errstr(status)));
3246 goto fail;
3247 }
3248 /* we don't need to low level fd */
3249 fd_close(base_fsp);
3250 }
3251
3252 /*
3253 * If it's a request for a directory open, deal with it separately.
3254 */
3255
3256 if (create_options & FILE_DIRECTORY_FILE) {
3257
3258 if (create_options & FILE_NON_DIRECTORY_FILE) {
3259 status = NT_STATUS_INVALID_PARAMETER;
3260 goto fail;
3261 }
3262
3263 /* Can't open a temp directory. IFS kit test. */
3264 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3265 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3266 status = NT_STATUS_INVALID_PARAMETER;
3267 goto fail;
3268 }
3269
3270 /*
3271 * We will get a create directory here if the Win32
3272 * app specified a security descriptor in the
3273 * CreateDirectory() call.
3274 */
3275
3276 oplock_request = 0;
3277 status = open_directory(
3278 conn, req, smb_fname, access_mask, share_access,
3279 create_disposition, create_options, file_attributes,
3280 &info, &fsp);
3281 } else {
3282
3283 /*
3284 * Ordinary file case.
3285 */
3286
3287 status = file_new(req, conn, &fsp);
3288 if(!NT_STATUS_IS_OK(status)) {
3289 goto fail;
3290 }
3291
3292 status = fsp_set_smb_fname(fsp, smb_fname);
3293 if (!NT_STATUS_IS_OK(status)) {
3294 goto fail;
3295 }
3296
3297 /*
3298 * We're opening the stream element of a base_fsp
3299 * we already opened. Set up the base_fsp pointer.
3300 */
3301 if (base_fsp) {
3302 fsp->base_fsp = base_fsp;
3303 }
3304
3305 status = open_file_ntcreate(conn,
3306 req,
3307 access_mask,
3308 share_access,
3309 create_disposition,
3310 create_options,
3311 file_attributes,
3312 oplock_request,
3313 private_flags,
3314 &info,
3315 fsp);
3316
3317 if(!NT_STATUS_IS_OK(status)) {
3318 file_free(req, fsp);
3319 fsp = NULL;
3320 }
3321
3322 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3323
3324 /* A stream open never opens a directory */
3325
3326 if (base_fsp) {
3327 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3328 goto fail;
3329 }
3330
3331 /*
3332 * Fail the open if it was explicitly a non-directory
3333 * file.
3334 */
3335
3336 if (create_options & FILE_NON_DIRECTORY_FILE) {
3337 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3338 goto fail;
3339 }
3340
3341 oplock_request = 0;
3342 status = open_directory(
3343 conn, req, smb_fname, access_mask,
3344 share_access, create_disposition,
3345 create_options, file_attributes,
3346 &info, &fsp);
3347 }
3348 }
3349
3350 if (!NT_STATUS_IS_OK(status)) {
3351 goto fail;
3352 }
3353
3354 fsp->base_fsp = base_fsp;
3355
3356 /*
3357 * According to the MS documentation, the only time the security
3358 * descriptor is applied to the opened file is iff we *created* the
3359 * file; an existing file stays the same.
3360 *
3361 * Also, it seems (from observation) that you can open the file with
3362 * any access mask but you can still write the sd. We need to override
3363 * the granted access before we call set_sd
3364 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3365 */
3366
3367 if ((sd != NULL) && (info == FILE_WAS_CREATED)
3368 && lp_nt_acl_support(SNUM(conn))) {
3369
3370 uint32_t sec_info_sent;
3371 uint32_t saved_access_mask = fsp->access_mask;
3372
3373 sec_info_sent = get_sec_info(sd);
3374
3375 fsp->access_mask = FILE_GENERIC_ALL;
3376
3377 if (sec_info_sent & (SECINFO_OWNER|
3378 SECINFO_GROUP|
3379 SECINFO_DACL|
3380 SECINFO_SACL)) {
3381 status = set_sd(fsp, sd, sec_info_sent);
3382 }
3383
3384 fsp->access_mask = saved_access_mask;
3385
3386 if (!NT_STATUS_IS_OK(status)) {
3387 goto fail;
3388 }
3389 }
3390
3391 if ((ea_list != NULL) &&
3392 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3393 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3394 if (!NT_STATUS_IS_OK(status)) {
3395 goto fail;
3396 }
3397 }
3398
3399 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3400 status = NT_STATUS_ACCESS_DENIED;
3401 goto fail;
3402 }
3403
3404 /* Save the requested allocation size. */
3405 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3406 if (allocation_size
3407 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3408 fsp->initial_allocation_size = smb_roundup(
3409 fsp->conn, allocation_size);
3410 if (fsp->is_directory) {
3411 /* Can't set allocation size on a directory. */
3412 status = NT_STATUS_ACCESS_DENIED;
3413 goto fail;
3414 }
3415 if (vfs_allocate_file_space(
3416 fsp, fsp->initial_allocation_size) == -1) {
3417 status = NT_STATUS_DISK_FULL;
3418 goto fail;
3419 }
3420 } else {
3421 fsp->initial_allocation_size = smb_roundup(
3422 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3423 }
3424 }
3425
3426 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3427
3428 *result = fsp;
3429 if (pinfo != NULL) {
3430 *pinfo = info;
3431 }
3432
3433 smb_fname->st = fsp->fsp_name->st;
3434
3435 return NT_STATUS_OK;
3436
3437 fail:
3438 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3439
3440 if (fsp != NULL) {
3441 if (base_fsp && fsp->base_fsp == base_fsp) {
3442 /*
3443 * The close_file below will close
3444 * fsp->base_fsp.
3445 */
3446 base_fsp = NULL;
3447 }
3448 close_file(req, fsp, ERROR_CLOSE);
3449 fsp = NULL;
3450 }
3451 if (base_fsp != NULL) {
3452 close_file(req, base_fsp, ERROR_CLOSE);
3453 base_fsp = NULL;
3454 }
3455 return status;
3456 }
3457
3458 /*
3459 * Calculate the full path name given a relative fid.
3460 */
3461 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3462 struct smb_request *req,
3463 uint16_t root_dir_fid,
3464 const struct smb_filename *smb_fname,
3465 struct smb_filename **smb_fname_out)
3466 {
3467 files_struct *dir_fsp;
3468 char *parent_fname = NULL;
3469 char *new_base_name = NULL;
3470 NTSTATUS status;
3471
3472 if (root_dir_fid == 0 || !smb_fname) {
3473 status = NT_STATUS_INTERNAL_ERROR;
3474 goto out;
3475 }
3476
3477 dir_fsp = file_fsp(req, root_dir_fid);
3478
3479 if (dir_fsp == NULL) {
3480 status = NT_STATUS_INVALID_HANDLE;
3481 goto out;
3482 }
3483
3484 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3485 status = NT_STATUS_INVALID_HANDLE;
3486 goto out;
3487 }
3488
3489 if (!dir_fsp->is_directory) {
3490
3491 /*
3492 * Check to see if this is a mac fork of some kind.
3493 */
3494
3495 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3496 is_ntfs_stream_smb_fname(smb_fname)) {
3497 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3498 goto out;
3499 }
3500
3501 /*
3502 we need to handle the case when we get a
3503 relative open relative to a file and the
3504 pathname is blank - this is a reopen!
3505 (hint from demyn plantenberg)
3506 */
3507
3508 status = NT_STATUS_INVALID_HANDLE;
3509 goto out;
3510 }
3511
3512 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3513 /*
3514 * We're at the toplevel dir, the final file name
3515 * must not contain ./, as this is filtered out
3516 * normally by srvstr_get_path and unix_convert
3517 * explicitly rejects paths containing ./.
3518 */
3519 parent_fname = talloc_strdup(talloc_tos(), "");
3520 if (parent_fname == NULL) {
3521 status = NT_STATUS_NO_MEMORY;
3522 goto out;
3523 }
3524 } else {
3525 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3526
3527 /*
3528 * Copy in the base directory name.
3529 */
3530
3531 parent_fname = TALLOC_ARRAY(talloc_tos(), char,
3532 dir_name_len+2);
3533 if (parent_fname == NULL) {
3534 status = NT_STATUS_NO_MEMORY;
3535 goto out;
3536 }
3537 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3538 dir_name_len+1);
3539
3540 /*
3541 * Ensure it ends in a '/'.
3542 * We used TALLOC_SIZE +2 to add space for the '/'.
3543 */
3544
3545 if(dir_name_len
3546 && (parent_fname[dir_name_len-1] != '\\')
3547 && (parent_fname[dir_name_len-1] != '/')) {
3548 parent_fname[dir_name_len] = '/';
3549 parent_fname[dir_name_len+1] = '\0';
3550 }
3551 }
3552
3553 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3554 smb_fname->base_name);
3555 if (new_base_name == NULL) {
3556 status = NT_STATUS_NO_MEMORY;
3557 goto out;
3558 }
3559
3560 status = filename_convert(req,
3561 conn,
3562 req->flags2 & FLAGS2_DFS_PATHNAMES,
3563 new_base_name,
3564 0,
3565 NULL,
3566 smb_fname_out);
3567 if (!NT_STATUS_IS_OK(status)) {
3568 goto out;
3569 }
3570
3571 out:
3572 TALLOC_FREE(parent_fname);
3573 TALLOC_FREE(new_base_name);
3574 return status;
3575 }
3576
3577 NTSTATUS create_file_default(connection_struct *conn,
3578 struct smb_request *req,
3579 uint16_t root_dir_fid,
3580 struct smb_filename *smb_fname,
3581 uint32_t access_mask,
3582 uint32_t share_access,
3583 uint32_t create_disposition,
3584 uint32_t create_options,
3585 uint32_t file_attributes,
3586 uint32_t oplock_request,
3587 uint64_t allocation_size,
3588 uint32_t private_flags,
3589 struct security_descriptor *sd,
3590 struct ea_list *ea_list,
3591 files_struct **result,
3592 int *pinfo)
3593 {
3594 int info = FILE_WAS_OPENED;
3595 files_struct *fsp = NULL;
3596 NTSTATUS status;
3597 bool stream_name = false;
3598
3599 DEBUG(10,("create_file: access_mask = 0x%x "
3600 "file_attributes = 0x%x, share_access = 0x%x, "
3601 "create_disposition = 0x%x create_options = 0x%x "
3602 "oplock_request = 0x%x "
3603 "private_flags = 0x%x "
3604 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3605 "fname = %s\n",
3606 (unsigned int)access_mask,
3607 (unsigned int)file_attributes,
3608 (unsigned int)share_access,
3609 (unsigned int)create_disposition,
3610 (unsigned int)create_options,
3611 (unsigned int)oplock_request,
3612 (unsigned int)private_flags,
3613 (unsigned int)root_dir_fid,
3614 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3615
3616 /*
3617 * Calculate the filename from the root_dir_if if necessary.
3618 */
3619
3620 if (root_dir_fid != 0) {
3621 struct smb_filename *smb_fname_out = NULL;
3622 status = get_relative_fid_filename(conn, req, root_dir_fid,
3623 smb_fname, &smb_fname_out);
3624 if (!NT_STATUS_IS_OK(status)) {
3625 goto fail;
3626 }
3627 smb_fname = smb_fname_out;
3628 }
3629
3630 /*
3631 * Check to see if this is a mac fork of some kind.
3632 */
3633
3634 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3635 if (stream_name) {
3636 enum FAKE_FILE_TYPE fake_file_type;
3637
3638 fake_file_type = is_fake_file(smb_fname);
3639
3640 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3641
3642 /*
3643 * Here we go! support for changing the disk quotas
3644 * --metze
3645 *
3646 * We need to fake up to open this MAGIC QUOTA file
3647 * and return a valid FID.
3648 *
3649 * w2k close this file directly after openening xp
3650 * also tries a QUERY_FILE_INFO on the file and then
3651 * close it
3652 */
3653 status = open_fake_file(req, conn, req->vuid,
3654 fake_file_type, smb_fname,
3655 access_mask, &fsp);
3656 if (!NT_STATUS_IS_OK(status)) {
3657 goto fail;
3658 }
3659
3660 ZERO_STRUCT(smb_fname->st);
3661 goto done;
3662 }
3663
3664 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3665 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3666 goto fail;
3667 }
3668 }
3669
3670 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3671 int ret;
3672 smb_fname->stream_name = NULL;
3673 /* We have to handle this error here. */
3674 if (create_options & FILE_DIRECTORY_FILE) {
3675 status = NT_STATUS_NOT_A_DIRECTORY;
3676 goto fail;
3677 }
3678 if (lp_posix_pathnames()) {
3679 ret = SMB_VFS_LSTAT(conn, smb_fname);
3680 } else {
3681 ret = SMB_VFS_STAT(conn, smb_fname);
3682 }
3683
3684 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3685 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3686 goto fail;
3687 }
3688 }
3689
3690 status = create_file_unixpath(
3691 conn, req, smb_fname, access_mask, share_access,
3692 create_disposition, create_options, file_attributes,
3693 oplock_request, allocation_size, private_flags,
3694 sd, ea_list,
3695 &fsp, &info);
3696
3697 if (!NT_STATUS_IS_OK(status)) {
3698 goto fail;
3699 }
3700
3701 done:
3702 DEBUG(10, ("create_file: info=%d\n", info));
3703
3704 *result = fsp;
3705 if (pinfo != NULL) {
3706 *pinfo = info;
3707 }
3708 return NT_STATUS_OK;
3709
3710 fail:
3711 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3712
3713 if (fsp != NULL) {
3714 close_file(req, fsp, ERROR_CLOSE);
3715 fsp = NULL;
3716 }
3717 return status;
3718 }
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