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Add streams support
[Samba.git] / source / smbd / open.c
blob0d6e07a032374f0a65fbae3715b25675f0e12f26
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
24 extern const struct generic_mapping file_generic_mapping;
25 extern struct current_user current_user;
26 extern userdom_struct current_user_info;
27 extern bool global_client_failed_oplock_break;
28
29 struct deferred_open_record {
30 bool delayed_for_oplocks;
31 struct file_id id;
32 };
33
34 /****************************************************************************
35 fd support routines - attempt to do a dos_open.
36 ****************************************************************************/
37
38 static NTSTATUS fd_open(struct connection_struct *conn,
39 const char *fname,
40 files_struct *fsp,
41 int flags,
42 mode_t mode)
43 {
44 NTSTATUS status = NT_STATUS_OK;
45
46 #ifdef O_NOFOLLOW
47 /*
48 * Never follow symlinks on a POSIX client. The
49 * client should be doing this.
50 */
51
52 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
53 flags |= O_NOFOLLOW;
54 }
55 #endif
56
57 fsp->fh->fd = SMB_VFS_OPEN(conn,fname,fsp,flags,mode);
58 if (fsp->fh->fd == -1) {
59 status = map_nt_error_from_unix(errno);
60 }
61
62 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
63 fname, flags, (int)mode, fsp->fh->fd,
64 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
65
66 return status;
67 }
68
69 /****************************************************************************
70 Close the file associated with a fsp.
71 ****************************************************************************/
72
73 NTSTATUS fd_close(files_struct *fsp)
74 {
75 if (fsp->fh->fd == -1) {
76 return NT_STATUS_OK; /* What we used to call a stat open. */
77 }
78 if (fsp->fh->ref_count > 1) {
79 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
80 }
81 return fd_close_posix(fsp);
82 }
83
84 /****************************************************************************
85 Change the ownership of a file to that of the parent directory.
86 Do this by fd if possible.
87 ****************************************************************************/
88
89 static void change_file_owner_to_parent(connection_struct *conn,
90 const char *inherit_from_dir,
91 files_struct *fsp)
92 {
93 SMB_STRUCT_STAT parent_st;
94 int ret;
95
96 ret = SMB_VFS_STAT(conn, inherit_from_dir, &parent_st);
97 if (ret == -1) {
98 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
99 "directory %s. Error was %s\n",
100 inherit_from_dir, strerror(errno) ));
101 return;
102 }
103
104 become_root();
105 ret = SMB_VFS_FCHOWN(fsp, parent_st.st_uid, (gid_t)-1);
106 unbecome_root();
107 if (ret == -1) {
108 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
109 "file %s to parent directory uid %u. Error "
110 "was %s\n", fsp->fsp_name,
111 (unsigned int)parent_st.st_uid,
112 strerror(errno) ));
113 }
114
115 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
116 "parent directory uid %u.\n", fsp->fsp_name,
117 (unsigned int)parent_st.st_uid ));
118 }
119
120 static NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
121 const char *inherit_from_dir,
122 const char *fname,
123 SMB_STRUCT_STAT *psbuf)
124 {
125 char *saved_dir = NULL;
126 SMB_STRUCT_STAT sbuf;
127 SMB_STRUCT_STAT parent_st;
128 TALLOC_CTX *ctx = talloc_tos();
129 NTSTATUS status = NT_STATUS_OK;
130 int ret;
131
132 ret = SMB_VFS_STAT(conn, inherit_from_dir, &parent_st);
133 if (ret == -1) {
134 status = map_nt_error_from_unix(errno);
135 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
136 "directory %s. Error was %s\n",
137 inherit_from_dir, strerror(errno) ));
138 return status;
139 }
140
141 /* We've already done an lstat into psbuf, and we know it's a
142 directory. If we can cd into the directory and the dev/ino
143 are the same then we can safely chown without races as
144 we're locking the directory in place by being in it. This
145 should work on any UNIX (thanks tridge :-). JRA.
146 */
147
148 saved_dir = vfs_GetWd(ctx,conn);
149 if (!saved_dir) {
150 status = map_nt_error_from_unix(errno);
151 DEBUG(0,("change_dir_owner_to_parent: failed to get "
152 "current working directory. Error was %s\n",
153 strerror(errno)));
154 return status;
155 }
156
157 /* Chdir into the new path. */
158 if (vfs_ChDir(conn, fname) == -1) {
159 status = map_nt_error_from_unix(errno);
160 DEBUG(0,("change_dir_owner_to_parent: failed to change "
161 "current working directory to %s. Error "
162 "was %s\n", fname, strerror(errno) ));
163 goto out;
164 }
165
166 if (SMB_VFS_STAT(conn,".",&sbuf) == -1) {
167 status = map_nt_error_from_unix(errno);
168 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
169 "directory '.' (%s) Error was %s\n",
170 fname, strerror(errno)));
171 goto out;
172 }
173
174 /* Ensure we're pointing at the same place. */
175 if (sbuf.st_dev != psbuf->st_dev ||
176 sbuf.st_ino != psbuf->st_ino ||
177 sbuf.st_mode != psbuf->st_mode ) {
178 DEBUG(0,("change_dir_owner_to_parent: "
179 "device/inode/mode on directory %s changed. "
180 "Refusing to chown !\n", fname ));
181 status = NT_STATUS_ACCESS_DENIED;
182 goto out;
183 }
184
185 become_root();
186 ret = SMB_VFS_CHOWN(conn, ".", parent_st.st_uid, (gid_t)-1);
187 unbecome_root();
188 if (ret == -1) {
189 status = map_nt_error_from_unix(errno);
190 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
191 "directory %s to parent directory uid %u. "
192 "Error was %s\n", fname,
193 (unsigned int)parent_st.st_uid, strerror(errno) ));
194 goto out;
195 }
196
197 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
198 "directory %s to parent directory uid %u.\n",
199 fname, (unsigned int)parent_st.st_uid ));
200
201 out:
202
203 vfs_ChDir(conn,saved_dir);
204 return status;
205 }
206
207 /****************************************************************************
208 Open a file.
209 ****************************************************************************/
210
211 static NTSTATUS open_file(files_struct *fsp,
212 connection_struct *conn,
213 struct smb_request *req,
214 const char *parent_dir,
215 const char *name,
216 const char *path,
217 SMB_STRUCT_STAT *psbuf,
218 int flags,
219 mode_t unx_mode,
220 uint32 access_mask, /* client requested access mask. */
221 uint32 open_access_mask) /* what we're actually using in the open. */
222 {
223 NTSTATUS status = NT_STATUS_OK;
224 int accmode = (flags & O_ACCMODE);
225 int local_flags = flags;
226 bool file_existed = VALID_STAT(*psbuf);
227
228 fsp->fh->fd = -1;
229 errno = EPERM;
230
231 /* Check permissions */
232
233 /*
234 * This code was changed after seeing a client open request
235 * containing the open mode of (DENY_WRITE/read-only) with
236 * the 'create if not exist' bit set. The previous code
237 * would fail to open the file read only on a read-only share
238 * as it was checking the flags parameter directly against O_RDONLY,
239 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
240 * JRA.
241 */
242
243 if (!CAN_WRITE(conn)) {
244 /* It's a read-only share - fail if we wanted to write. */
245 if(accmode != O_RDONLY) {
246 DEBUG(3,("Permission denied opening %s\n", path));
247 return NT_STATUS_ACCESS_DENIED;
248 } else if(flags & O_CREAT) {
249 /* We don't want to write - but we must make sure that
250 O_CREAT doesn't create the file if we have write
251 access into the directory.
252 */
253 flags &= ~O_CREAT;
254 local_flags &= ~O_CREAT;
255 }
256 }
257
258 /*
259 * This little piece of insanity is inspired by the
260 * fact that an NT client can open a file for O_RDONLY,
261 * but set the create disposition to FILE_EXISTS_TRUNCATE.
262 * If the client *can* write to the file, then it expects to
263 * truncate the file, even though it is opening for readonly.
264 * Quicken uses this stupid trick in backup file creation...
265 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
266 * for helping track this one down. It didn't bite us in 2.0.x
267 * as we always opened files read-write in that release. JRA.
268 */
269
270 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
271 DEBUG(10,("open_file: truncate requested on read-only open "
272 "for file %s\n", path));
273 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
274 }
275
276 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
277 (!file_existed && (local_flags & O_CREAT)) ||
278 ((local_flags & O_TRUNC) == O_TRUNC) ) {
279
280 /*
281 * We can't actually truncate here as the file may be locked.
282 * open_file_ntcreate will take care of the truncate later. JRA.
283 */
284
285 local_flags &= ~O_TRUNC;
286
287 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
288 /*
289 * We would block on opening a FIFO with no one else on the
290 * other end. Do what we used to do and add O_NONBLOCK to the
291 * open flags. JRA.
292 */
293
294 if (file_existed && S_ISFIFO(psbuf->st_mode)) {
295 local_flags |= O_NONBLOCK;
296 }
297 #endif
298
299 /* Don't create files with Microsoft wildcard characters. */
300 if ((local_flags & O_CREAT) && !file_existed &&
301 ms_has_wild(path)) {
302 return NT_STATUS_OBJECT_NAME_INVALID;
303 }
304
305 /* Actually do the open */
306 status = fd_open(conn, path, fsp, local_flags, unx_mode);
307 if (!NT_STATUS_IS_OK(status)) {
308 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
309 "(flags=%d)\n",
310 path,nt_errstr(status),local_flags,flags));
311 return status;
312 }
313
314 if ((local_flags & O_CREAT) && !file_existed) {
315
316 /* Inherit the ACL if required */
317 if (lp_inherit_perms(SNUM(conn))) {
318 inherit_access_acl(conn, parent_dir, path,
319 unx_mode);
320 }
321
322 /* Change the owner if required. */
323 if (lp_inherit_owner(SNUM(conn))) {
324 change_file_owner_to_parent(conn, parent_dir,
325 fsp);
326 }
327
328 notify_fname(conn, NOTIFY_ACTION_ADDED,
329 FILE_NOTIFY_CHANGE_FILE_NAME, path);
330 }
331
332 } else {
333 fsp->fh->fd = -1; /* What we used to call a stat open. */
334 }
335
336 if (!file_existed) {
337 int ret;
338
339 if (fsp->fh->fd == -1) {
340 ret = SMB_VFS_STAT(conn, path, psbuf);
341 } else {
342 ret = SMB_VFS_FSTAT(fsp, psbuf);
343 /* If we have an fd, this stat should succeed. */
344 if (ret == -1) {
345 DEBUG(0,("Error doing fstat on open file %s "
346 "(%s)\n", path,strerror(errno) ));
347 }
348 }
349
350 /* For a non-io open, this stat failing means file not found. JRA */
351 if (ret == -1) {
352 status = map_nt_error_from_unix(errno);
353 fd_close(fsp);
354 return status;
355 }
356 }
357
358 /*
359 * POSIX allows read-only opens of directories. We don't
360 * want to do this (we use a different code path for this)
361 * so catch a directory open and return an EISDIR. JRA.
362 */
363
364 if(S_ISDIR(psbuf->st_mode)) {
365 fd_close(fsp);
366 errno = EISDIR;
367 return NT_STATUS_FILE_IS_A_DIRECTORY;
368 }
369
370 fsp->mode = psbuf->st_mode;
371 fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
372 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
373 fsp->file_pid = req ? req->smbpid : 0;
374 fsp->can_lock = True;
375 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
376 if (!CAN_WRITE(conn)) {
377 fsp->can_write = False;
378 } else {
379 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
380 True : False;
381 }
382 fsp->print_file = False;
383 fsp->modified = False;
384 fsp->sent_oplock_break = NO_BREAK_SENT;
385 fsp->is_directory = False;
386 fsp->is_stat = False;
387 if (conn->aio_write_behind_list &&
388 is_in_path(path, conn->aio_write_behind_list, conn->case_sensitive)) {
389 fsp->aio_write_behind = True;
390 }
391
392 string_set(&fsp->fsp_name, path);
393 fsp->wcp = NULL; /* Write cache pointer. */
394
395 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
396 *current_user_info.smb_name ?
397 current_user_info.smb_name : conn->user,fsp->fsp_name,
398 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
399 conn->num_files_open + 1));
400
401 errno = 0;
402 return NT_STATUS_OK;
403 }
404
405 /*******************************************************************
406 Return True if the filename is one of the special executable types.
407 ********************************************************************/
408
409 static bool is_executable(const char *fname)
410 {
411 if ((fname = strrchr_m(fname,'.'))) {
412 if (strequal(fname,".com") ||
413 strequal(fname,".dll") ||
414 strequal(fname,".exe") ||
415 strequal(fname,".sym")) {
416 return True;
417 }
418 }
419 return False;
420 }
421
422 /****************************************************************************
423 Check if we can open a file with a share mode.
424 Returns True if conflict, False if not.
425 ****************************************************************************/
426
427 static bool share_conflict(struct share_mode_entry *entry,
428 uint32 access_mask,
429 uint32 share_access)
430 {
431 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
432 "entry->share_access = 0x%x, "
433 "entry->private_options = 0x%x\n",
434 (unsigned int)entry->access_mask,
435 (unsigned int)entry->share_access,
436 (unsigned int)entry->private_options));
437
438 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
439 (unsigned int)access_mask, (unsigned int)share_access));
440
441 if ((entry->access_mask & (FILE_WRITE_DATA|
442 FILE_APPEND_DATA|
443 FILE_READ_DATA|
444 FILE_EXECUTE|
445 DELETE_ACCESS)) == 0) {
446 DEBUG(10,("share_conflict: No conflict due to "
447 "entry->access_mask = 0x%x\n",
448 (unsigned int)entry->access_mask ));
449 return False;
450 }
451
452 if ((access_mask & (FILE_WRITE_DATA|
453 FILE_APPEND_DATA|
454 FILE_READ_DATA|
455 FILE_EXECUTE|
456 DELETE_ACCESS)) == 0) {
457 DEBUG(10,("share_conflict: No conflict due to "
458 "access_mask = 0x%x\n",
459 (unsigned int)access_mask ));
460 return False;
461 }
462
463 #if 1 /* JRA TEST - Superdebug. */
464 #define CHECK_MASK(num, am, right, sa, share) \
465 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
466 (unsigned int)(num), (unsigned int)(am), \
467 (unsigned int)(right), (unsigned int)(am)&(right) )); \
468 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
469 (unsigned int)(num), (unsigned int)(sa), \
470 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
471 if (((am) & (right)) && !((sa) & (share))) { \
472 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
473 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
474 (unsigned int)(share) )); \
475 return True; \
476 }
477 #else
478 #define CHECK_MASK(num, am, right, sa, share) \
479 if (((am) & (right)) && !((sa) & (share))) { \
480 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
481 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
482 (unsigned int)(share) )); \
483 return True; \
484 }
485 #endif
486
487 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
488 share_access, FILE_SHARE_WRITE);
489 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
490 entry->share_access, FILE_SHARE_WRITE);
491
492 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
493 share_access, FILE_SHARE_READ);
494 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
495 entry->share_access, FILE_SHARE_READ);
496
497 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
498 share_access, FILE_SHARE_DELETE);
499 CHECK_MASK(6, access_mask, DELETE_ACCESS,
500 entry->share_access, FILE_SHARE_DELETE);
501
502 DEBUG(10,("share_conflict: No conflict.\n"));
503 return False;
504 }
505
506 #if defined(DEVELOPER)
507 static void validate_my_share_entries(int num,
508 struct share_mode_entry *share_entry)
509 {
510 files_struct *fsp;
511
512 if (!procid_is_me(&share_entry->pid)) {
513 return;
514 }
515
516 if (is_deferred_open_entry(share_entry) &&
517 !open_was_deferred(share_entry->op_mid)) {
518 char *str = talloc_asprintf(talloc_tos(),
519 "Got a deferred entry without a request: "
520 "PANIC: %s\n",
521 share_mode_str(talloc_tos(), num, share_entry));
522 smb_panic(str);
523 }
524
525 if (!is_valid_share_mode_entry(share_entry)) {
526 return;
527 }
528
529 fsp = file_find_dif(share_entry->id,
530 share_entry->share_file_id);
531 if (!fsp) {
532 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
533 share_mode_str(talloc_tos(), num, share_entry) ));
534 smb_panic("validate_my_share_entries: Cannot match a "
535 "share entry with an open file\n");
536 }
537
538 if (is_deferred_open_entry(share_entry) ||
539 is_unused_share_mode_entry(share_entry)) {
540 goto panic;
541 }
542
543 if ((share_entry->op_type == NO_OPLOCK) &&
544 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
545 /* Someone has already written to it, but I haven't yet
546 * noticed */
547 return;
548 }
549
550 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
551 goto panic;
552 }
553
554 return;
555
556 panic:
557 {
558 char *str;
559 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
560 share_mode_str(talloc_tos(), num, share_entry) ));
561 str = talloc_asprintf(talloc_tos(),
562 "validate_my_share_entries: "
563 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
564 fsp->fsp_name, (unsigned int)fsp->oplock_type,
565 (unsigned int)share_entry->op_type );
566 smb_panic(str);
567 }
568 }
569 #endif
570
571 static bool is_stat_open(uint32 access_mask)
572 {
573 return (access_mask &&
574 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
575 FILE_WRITE_ATTRIBUTES))==0) &&
576 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
577 FILE_WRITE_ATTRIBUTES)) != 0));
578 }
579
580 /****************************************************************************
581 Deal with share modes
582 Invarient: Share mode must be locked on entry and exit.
583 Returns -1 on error, or number of share modes on success (may be zero).
584 ****************************************************************************/
585
586 static NTSTATUS open_mode_check(connection_struct *conn,
587 const char *fname,
588 struct share_mode_lock *lck,
589 uint32 access_mask,
590 uint32 share_access,
591 uint32 create_options,
592 bool *file_existed)
593 {
594 int i;
595
596 if(lck->num_share_modes == 0) {
597 return NT_STATUS_OK;
598 }
599
600 *file_existed = True;
601
602 /* A delete on close prohibits everything */
603
604 if (lck->delete_on_close) {
605 return NT_STATUS_DELETE_PENDING;
606 }
607
608 if (is_stat_open(access_mask)) {
609 /* Stat open that doesn't trigger oplock breaks or share mode
610 * checks... ! JRA. */
611 return NT_STATUS_OK;
612 }
613
614 /*
615 * Check if the share modes will give us access.
616 */
617
618 #if defined(DEVELOPER)
619 for(i = 0; i < lck->num_share_modes; i++) {
620 validate_my_share_entries(i, &lck->share_modes[i]);
621 }
622 #endif
623
624 if (!lp_share_modes(SNUM(conn))) {
625 return NT_STATUS_OK;
626 }
627
628 /* Now we check the share modes, after any oplock breaks. */
629 for(i = 0; i < lck->num_share_modes; i++) {
630
631 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
632 continue;
633 }
634
635 /* someone else has a share lock on it, check to see if we can
636 * too */
637 if (share_conflict(&lck->share_modes[i],
638 access_mask, share_access)) {
639 return NT_STATUS_SHARING_VIOLATION;
640 }
641 }
642
643 return NT_STATUS_OK;
644 }
645
646 static bool is_delete_request(files_struct *fsp) {
647 return ((fsp->access_mask == DELETE_ACCESS) &&
648 (fsp->oplock_type == NO_OPLOCK));
649 }
650
651 /*
652 * 1) No files open at all or internal open: Grant whatever the client wants.
653 *
654 * 2) Exclusive (or batch) oplock around: If the requested access is a delete
655 * request, break if the oplock around is a batch oplock. If it's another
656 * requested access type, break.
657 *
658 * 3) Only level2 around: Grant level2 and do nothing else.
659 */
660
661 static bool delay_for_oplocks(struct share_mode_lock *lck,
662 files_struct *fsp,
663 uint16 mid,
664 int pass_number,
665 int oplock_request)
666 {
667 int i;
668 struct share_mode_entry *exclusive = NULL;
669 bool valid_entry = False;
670 bool delay_it = False;
671 bool have_level2 = False;
672 NTSTATUS status;
673 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
674
675 if (oplock_request & INTERNAL_OPEN_ONLY) {
676 fsp->oplock_type = NO_OPLOCK;
677 }
678
679 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
680 return False;
681 }
682
683 for (i=0; i<lck->num_share_modes; i++) {
684
685 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
686 continue;
687 }
688
689 /* At least one entry is not an invalid or deferred entry. */
690 valid_entry = True;
691
692 if (pass_number == 1) {
693 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
694 SMB_ASSERT(exclusive == NULL);
695 exclusive = &lck->share_modes[i];
696 }
697 } else {
698 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
699 SMB_ASSERT(exclusive == NULL);
700 exclusive = &lck->share_modes[i];
701 }
702 }
703
704 if (lck->share_modes[i].op_type == LEVEL_II_OPLOCK) {
705 SMB_ASSERT(exclusive == NULL);
706 have_level2 = True;
707 }
708 }
709
710 if (!valid_entry) {
711 /* All entries are placeholders or deferred.
712 * Directly grant whatever the client wants. */
713 if (fsp->oplock_type == NO_OPLOCK) {
714 /* Store a level2 oplock, but don't tell the client */
715 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
716 }
717 return False;
718 }
719
720 if (exclusive != NULL) { /* Found an exclusive oplock */
721 SMB_ASSERT(!have_level2);
722 delay_it = is_delete_request(fsp) ?
723 BATCH_OPLOCK_TYPE(exclusive->op_type) : True;
724 }
725
726 if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
727 /* We can at most grant level2 as there are other
728 * level2 or NO_OPLOCK entries. */
729 fsp->oplock_type = LEVEL_II_OPLOCK;
730 }
731
732 if ((fsp->oplock_type == NO_OPLOCK) && have_level2) {
733 /* Store a level2 oplock, but don't tell the client */
734 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
735 }
736
737 if (!delay_it) {
738 return False;
739 }
740
741 /*
742 * Send a break message to the oplock holder and delay the open for
743 * our client.
744 */
745
746 DEBUG(10, ("Sending break request to PID %s\n",
747 procid_str_static(&exclusive->pid)));
748 exclusive->op_mid = mid;
749
750 /* Create the message. */
751 share_mode_entry_to_message(msg, exclusive);
752
753 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
754 don't want this set in the share mode struct pointed to by lck. */
755
756 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
757 SSVAL(msg,6,exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
758 }
759
760 status = messaging_send_buf(smbd_messaging_context(), exclusive->pid,
761 MSG_SMB_BREAK_REQUEST,
762 (uint8 *)msg,
763 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
764 if (!NT_STATUS_IS_OK(status)) {
765 DEBUG(3, ("Could not send oplock break message: %s\n",
766 nt_errstr(status)));
767 }
768
769 return True;
770 }
771
772 static bool request_timed_out(struct timeval request_time,
773 struct timeval timeout)
774 {
775 struct timeval now, end_time;
776 GetTimeOfDay(&now);
777 end_time = timeval_sum(&request_time, &timeout);
778 return (timeval_compare(&end_time, &now) < 0);
779 }
780
781 /****************************************************************************
782 Handle the 1 second delay in returning a SHARING_VIOLATION error.
783 ****************************************************************************/
784
785 static void defer_open(struct share_mode_lock *lck,
786 struct timeval request_time,
787 struct timeval timeout,
788 struct smb_request *req,
789 struct deferred_open_record *state)
790 {
791 int i;
792
793 /* Paranoia check */
794
795 for (i=0; i<lck->num_share_modes; i++) {
796 struct share_mode_entry *e = &lck->share_modes[i];
797
798 if (!is_deferred_open_entry(e)) {
799 continue;
800 }
801
802 if (procid_is_me(&e->pid) && (e->op_mid == req->mid)) {
803 DEBUG(0, ("Trying to defer an already deferred "
804 "request: mid=%d, exiting\n", req->mid));
805 exit_server("attempt to defer a deferred request");
806 }
807 }
808
809 /* End paranoia check */
810
811 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
812 "open entry for mid %u\n",
813 (unsigned int)request_time.tv_sec,
814 (unsigned int)request_time.tv_usec,
815 (unsigned int)req->mid));
816
817 if (!push_deferred_smb_message(req, request_time, timeout,
818 (char *)state, sizeof(*state))) {
819 exit_server("push_deferred_smb_message failed");
820 }
821 add_deferred_open(lck, req->mid, request_time, state->id);
822
823 /*
824 * Push the MID of this packet on the signing queue.
825 * We only do this once, the first time we push the packet
826 * onto the deferred open queue, as this has a side effect
827 * of incrementing the response sequence number.
828 */
829
830 srv_defer_sign_response(req->mid);
831 }
832
833
834 /****************************************************************************
835 On overwrite open ensure that the attributes match.
836 ****************************************************************************/
837
838 static bool open_match_attributes(connection_struct *conn,
839 const char *path,
840 uint32 old_dos_attr,
841 uint32 new_dos_attr,
842 mode_t existing_unx_mode,
843 mode_t new_unx_mode,
844 mode_t *returned_unx_mode)
845 {
846 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
847
848 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
849 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
850
851 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
852 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
853 *returned_unx_mode = new_unx_mode;
854 } else {
855 *returned_unx_mode = (mode_t)0;
856 }
857
858 DEBUG(10,("open_match_attributes: file %s old_dos_attr = 0x%x, "
859 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
860 "returned_unx_mode = 0%o\n",
861 path,
862 (unsigned int)old_dos_attr,
863 (unsigned int)existing_unx_mode,
864 (unsigned int)new_dos_attr,
865 (unsigned int)*returned_unx_mode ));
866
867 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
868 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
869 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
870 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
871 return False;
872 }
873 }
874 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
875 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
876 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
877 return False;
878 }
879 }
880 return True;
881 }
882
883 /****************************************************************************
884 Special FCB or DOS processing in the case of a sharing violation.
885 Try and find a duplicated file handle.
886 ****************************************************************************/
887
888 static files_struct *fcb_or_dos_open(connection_struct *conn,
889 const char *fname,
890 struct file_id id,
891 uint16 file_pid,
892 uint16 vuid,
893 uint32 access_mask,
894 uint32 share_access,
895 uint32 create_options)
896 {
897 files_struct *fsp;
898 files_struct *dup_fsp;
899
900 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
901 "file %s.\n", fname ));
902
903 for(fsp = file_find_di_first(id); fsp;
904 fsp = file_find_di_next(fsp)) {
905
906 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
907 "vuid = %u, file_pid = %u, private_options = 0x%x "
908 "access_mask = 0x%x\n", fsp->fsp_name,
909 fsp->fh->fd, (unsigned int)fsp->vuid,
910 (unsigned int)fsp->file_pid,
911 (unsigned int)fsp->fh->private_options,
912 (unsigned int)fsp->access_mask ));
913
914 if (fsp->fh->fd != -1 &&
915 fsp->vuid == vuid &&
916 fsp->file_pid == file_pid &&
917 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
918 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
919 (fsp->access_mask & FILE_WRITE_DATA) &&
920 strequal(fsp->fsp_name, fname)) {
921 DEBUG(10,("fcb_or_dos_open: file match\n"));
922 break;
923 }
924 }
925
926 if (!fsp) {
927 return NULL;
928 }
929
930 /* quite an insane set of semantics ... */
931 if (is_executable(fname) &&
932 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
933 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
934 return NULL;
935 }
936
937 /* We need to duplicate this fsp. */
938 if (!NT_STATUS_IS_OK(dup_file_fsp(fsp, access_mask, share_access,
939 create_options, &dup_fsp))) {
940 return NULL;
941 }
942
943 return dup_fsp;
944 }
945
946 /****************************************************************************
947 Open a file with a share mode - old openX method - map into NTCreate.
948 ****************************************************************************/
949
950 bool map_open_params_to_ntcreate(const char *fname, int deny_mode, int open_func,
951 uint32 *paccess_mask,
952 uint32 *pshare_mode,
953 uint32 *pcreate_disposition,
954 uint32 *pcreate_options)
955 {
956 uint32 access_mask;
957 uint32 share_mode;
958 uint32 create_disposition;
959 uint32 create_options = 0;
960
961 DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
962 "open_func = 0x%x\n",
963 fname, (unsigned int)deny_mode, (unsigned int)open_func ));
964
965 /* Create the NT compatible access_mask. */
966 switch (GET_OPENX_MODE(deny_mode)) {
967 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
968 case DOS_OPEN_RDONLY:
969 access_mask = FILE_GENERIC_READ;
970 break;
971 case DOS_OPEN_WRONLY:
972 access_mask = FILE_GENERIC_WRITE;
973 break;
974 case DOS_OPEN_RDWR:
975 case DOS_OPEN_FCB:
976 access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
977 break;
978 default:
979 DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
980 (unsigned int)GET_OPENX_MODE(deny_mode)));
981 return False;
982 }
983
984 /* Create the NT compatible create_disposition. */
985 switch (open_func) {
986 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
987 create_disposition = FILE_CREATE;
988 break;
989
990 case OPENX_FILE_EXISTS_OPEN:
991 create_disposition = FILE_OPEN;
992 break;
993
994 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
995 create_disposition = FILE_OPEN_IF;
996 break;
997
998 case OPENX_FILE_EXISTS_TRUNCATE:
999 create_disposition = FILE_OVERWRITE;
1000 break;
1001
1002 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
1003 create_disposition = FILE_OVERWRITE_IF;
1004 break;
1005
1006 default:
1007 /* From samba4 - to be confirmed. */
1008 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
1009 create_disposition = FILE_CREATE;
1010 break;
1011 }
1012 DEBUG(10,("map_open_params_to_ntcreate: bad "
1013 "open_func 0x%x\n", (unsigned int)open_func));
1014 return False;
1015 }
1016
1017 /* Create the NT compatible share modes. */
1018 switch (GET_DENY_MODE(deny_mode)) {
1019 case DENY_ALL:
1020 share_mode = FILE_SHARE_NONE;
1021 break;
1022
1023 case DENY_WRITE:
1024 share_mode = FILE_SHARE_READ;
1025 break;
1026
1027 case DENY_READ:
1028 share_mode = FILE_SHARE_WRITE;
1029 break;
1030
1031 case DENY_NONE:
1032 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1033 break;
1034
1035 case DENY_DOS:
1036 create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1037 if (is_executable(fname)) {
1038 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1039 } else {
1040 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1041 share_mode = FILE_SHARE_READ;
1042 } else {
1043 share_mode = FILE_SHARE_NONE;
1044 }
1045 }
1046 break;
1047
1048 case DENY_FCB:
1049 create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1050 share_mode = FILE_SHARE_NONE;
1051 break;
1052
1053 default:
1054 DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1055 (unsigned int)GET_DENY_MODE(deny_mode) ));
1056 return False;
1057 }
1058
1059 DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1060 "share_mode = 0x%x, create_disposition = 0x%x, "
1061 "create_options = 0x%x\n",
1062 fname,
1063 (unsigned int)access_mask,
1064 (unsigned int)share_mode,
1065 (unsigned int)create_disposition,
1066 (unsigned int)create_options ));
1067
1068 if (paccess_mask) {
1069 *paccess_mask = access_mask;
1070 }
1071 if (pshare_mode) {
1072 *pshare_mode = share_mode;
1073 }
1074 if (pcreate_disposition) {
1075 *pcreate_disposition = create_disposition;
1076 }
1077 if (pcreate_options) {
1078 *pcreate_options = create_options;
1079 }
1080
1081 return True;
1082
1083 }
1084
1085 static void schedule_defer_open(struct share_mode_lock *lck,
1086 struct timeval request_time,
1087 struct smb_request *req)
1088 {
1089 struct deferred_open_record state;
1090
1091 /* This is a relative time, added to the absolute
1092 request_time value to get the absolute timeout time.
1093 Note that if this is the second or greater time we enter
1094 this codepath for this particular request mid then
1095 request_time is left as the absolute time of the *first*
1096 time this request mid was processed. This is what allows
1097 the request to eventually time out. */
1098
1099 struct timeval timeout;
1100
1101 /* Normally the smbd we asked should respond within
1102 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1103 * the client did, give twice the timeout as a safety
1104 * measure here in case the other smbd is stuck
1105 * somewhere else. */
1106
1107 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1108
1109 /* Nothing actually uses state.delayed_for_oplocks
1110 but it's handy to differentiate in debug messages
1111 between a 30 second delay due to oplock break, and
1112 a 1 second delay for share mode conflicts. */
1113
1114 state.delayed_for_oplocks = True;
1115 state.id = lck->id;
1116
1117 if (!request_timed_out(request_time, timeout)) {
1118 defer_open(lck, request_time, timeout, req, &state);
1119 }
1120 }
1121
1122 /****************************************************************************
1123 Open a file with a share mode.
1124 ****************************************************************************/
1125
1126 NTSTATUS open_file_ntcreate(connection_struct *conn,
1127 struct smb_request *req,
1128 const char *fname,
1129 SMB_STRUCT_STAT *psbuf,
1130 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1131 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1132 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1133 uint32 create_options, /* options such as delete on close. */
1134 uint32 new_dos_attributes, /* attributes used for new file. */
1135 int oplock_request, /* internal Samba oplock codes. */
1136 /* Information (FILE_EXISTS etc.) */
1137 int *pinfo,
1138 files_struct **result)
1139 {
1140 int flags=0;
1141 int flags2=0;
1142 bool file_existed = VALID_STAT(*psbuf);
1143 bool def_acl = False;
1144 bool posix_open = False;
1145 bool new_file_created = False;
1146 struct file_id id;
1147 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1148 files_struct *fsp = NULL;
1149 mode_t new_unx_mode = (mode_t)0;
1150 mode_t unx_mode = (mode_t)0;
1151 int info;
1152 uint32 existing_dos_attributes = 0;
1153 struct pending_message_list *pml = NULL;
1154 struct timeval request_time = timeval_zero();
1155 struct share_mode_lock *lck = NULL;
1156 uint32 open_access_mask = access_mask;
1157 NTSTATUS status;
1158 int ret_flock;
1159 char *parent_dir;
1160 const char *newname;
1161
1162 ZERO_STRUCT(id);
1163
1164 if (conn->printer) {
1165 /*
1166 * Printers are handled completely differently.
1167 * Most of the passed parameters are ignored.
1168 */
1169
1170 if (pinfo) {
1171 *pinfo = FILE_WAS_CREATED;
1172 }
1173
1174 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n", fname));
1175
1176 return print_fsp_open(conn, fname, result);
1177 }
1178
1179 if (!parent_dirname_talloc(talloc_tos(), fname, &parent_dir,
1180 &newname)) {
1181 return NT_STATUS_NO_MEMORY;
1182 }
1183
1184 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1185 posix_open = True;
1186 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1187 new_dos_attributes = 0;
1188 } else {
1189 /* We add aARCH to this as this mode is only used if the file is
1190 * created new. */
1191 unx_mode = unix_mode(conn, new_dos_attributes | aARCH, fname,
1192 parent_dir);
1193 }
1194
1195 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1196 "access_mask=0x%x share_access=0x%x "
1197 "create_disposition = 0x%x create_options=0x%x "
1198 "unix mode=0%o oplock_request=%d\n",
1199 fname, new_dos_attributes, access_mask, share_access,
1200 create_disposition, create_options, unx_mode,
1201 oplock_request));
1202
1203 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1204 DEBUG(0, ("No smb request but not an internal only open!\n"));
1205 return NT_STATUS_INTERNAL_ERROR;
1206 }
1207
1208 /*
1209 * Only non-internal opens can be deferred at all
1210 */
1211
1212 if ((req != NULL)
1213 && ((pml = get_open_deferred_message(req->mid)) != NULL)) {
1214 struct deferred_open_record *state =
1215 (struct deferred_open_record *)pml->private_data.data;
1216
1217 /* Remember the absolute time of the original
1218 request with this mid. We'll use it later to
1219 see if this has timed out. */
1220
1221 request_time = pml->request_time;
1222
1223 /* Remove the deferred open entry under lock. */
1224 lck = get_share_mode_lock(talloc_tos(), state->id, NULL, NULL);
1225 if (lck == NULL) {
1226 DEBUG(0, ("could not get share mode lock\n"));
1227 } else {
1228 del_deferred_open_entry(lck, req->mid);
1229 TALLOC_FREE(lck);
1230 }
1231
1232 /* Ensure we don't reprocess this message. */
1233 remove_deferred_open_smb_message(req->mid);
1234 }
1235
1236 status = check_name(conn, fname);
1237 if (!NT_STATUS_IS_OK(status)) {
1238 return status;
1239 }
1240
1241 if (!posix_open) {
1242 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1243 if (file_existed) {
1244 existing_dos_attributes = dos_mode(conn, fname, psbuf);
1245 }
1246 }
1247
1248 /* ignore any oplock requests if oplocks are disabled */
1249 if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break ||
1250 IS_VETO_OPLOCK_PATH(conn, fname)) {
1251 /* Mask off everything except the private Samba bits. */
1252 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1253 }
1254
1255 /* this is for OS/2 long file names - say we don't support them */
1256 if (!lp_posix_pathnames() && strstr(fname,".+,;=[].")) {
1257 /* OS/2 Workplace shell fix may be main code stream in a later
1258 * release. */
1259 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1260 "supported.\n"));
1261 if (use_nt_status()) {
1262 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1263 }
1264 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1265 }
1266
1267 switch( create_disposition ) {
1268 /*
1269 * Currently we're using FILE_SUPERSEDE as the same as
1270 * FILE_OVERWRITE_IF but they really are
1271 * different. FILE_SUPERSEDE deletes an existing file
1272 * (requiring delete access) then recreates it.
1273 */
1274 case FILE_SUPERSEDE:
1275 /* If file exists replace/overwrite. If file doesn't
1276 * exist create. */
1277 flags2 |= (O_CREAT | O_TRUNC);
1278 break;
1279
1280 case FILE_OVERWRITE_IF:
1281 /* If file exists replace/overwrite. If file doesn't
1282 * exist create. */
1283 flags2 |= (O_CREAT | O_TRUNC);
1284 break;
1285
1286 case FILE_OPEN:
1287 /* If file exists open. If file doesn't exist error. */
1288 if (!file_existed) {
1289 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1290 "requested for file %s and file "
1291 "doesn't exist.\n", fname ));
1292 errno = ENOENT;
1293 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1294 }
1295 break;
1296
1297 case FILE_OVERWRITE:
1298 /* If file exists overwrite. If file doesn't exist
1299 * error. */
1300 if (!file_existed) {
1301 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1302 "requested for file %s and file "
1303 "doesn't exist.\n", fname ));
1304 errno = ENOENT;
1305 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1306 }
1307 flags2 |= O_TRUNC;
1308 break;
1309
1310 case FILE_CREATE:
1311 /* If file exists error. If file doesn't exist
1312 * create. */
1313 if (file_existed) {
1314 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1315 "requested for file %s and file "
1316 "already exists.\n", fname ));
1317 if (S_ISDIR(psbuf->st_mode)) {
1318 errno = EISDIR;
1319 } else {
1320 errno = EEXIST;
1321 }
1322 return map_nt_error_from_unix(errno);
1323 }
1324 flags2 |= (O_CREAT|O_EXCL);
1325 break;
1326
1327 case FILE_OPEN_IF:
1328 /* If file exists open. If file doesn't exist
1329 * create. */
1330 flags2 |= O_CREAT;
1331 break;
1332
1333 default:
1334 return NT_STATUS_INVALID_PARAMETER;
1335 }
1336
1337 /* We only care about matching attributes on file exists and
1338 * overwrite. */
1339
1340 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1341 (create_disposition == FILE_OVERWRITE_IF))) {
1342 if (!open_match_attributes(conn, fname,
1343 existing_dos_attributes,
1344 new_dos_attributes, psbuf->st_mode,
1345 unx_mode, &new_unx_mode)) {
1346 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1347 "for file %s (%x %x) (0%o, 0%o)\n",
1348 fname, existing_dos_attributes,
1349 new_dos_attributes,
1350 (unsigned int)psbuf->st_mode,
1351 (unsigned int)unx_mode ));
1352 errno = EACCES;
1353 return NT_STATUS_ACCESS_DENIED;
1354 }
1355 }
1356
1357 /* This is a nasty hack - must fix... JRA. */
1358 if (access_mask == MAXIMUM_ALLOWED_ACCESS) {
1359 open_access_mask = access_mask = FILE_GENERIC_ALL;
1360 }
1361
1362 /*
1363 * Convert GENERIC bits to specific bits.
1364 */
1365
1366 se_map_generic(&access_mask, &file_generic_mapping);
1367 open_access_mask = access_mask;
1368
1369 if (flags2 & O_TRUNC) {
1370 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1371 }
1372
1373 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1374 "access_mask=0x%x\n", fname, access_mask ));
1375
1376 /*
1377 * Note that we ignore the append flag as append does not
1378 * mean the same thing under DOS and Unix.
1379 */
1380
1381 if (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) {
1382 /* DENY_DOS opens are always underlying read-write on the
1383 file handle, no matter what the requested access mask
1384 says. */
1385 if ((create_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1386 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1387 flags = O_RDWR;
1388 } else {
1389 flags = O_WRONLY;
1390 }
1391 } else {
1392 flags = O_RDONLY;
1393 }
1394
1395 /*
1396 * Currently we only look at FILE_WRITE_THROUGH for create options.
1397 */
1398
1399 #if defined(O_SYNC)
1400 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1401 flags2 |= O_SYNC;
1402 }
1403 #endif /* O_SYNC */
1404
1405 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1406 flags2 |= O_APPEND;
1407 }
1408
1409 if (!posix_open && !CAN_WRITE(conn)) {
1410 /*
1411 * We should really return a permission denied error if either
1412 * O_CREAT or O_TRUNC are set, but for compatibility with
1413 * older versions of Samba we just AND them out.
1414 */
1415 flags2 &= ~(O_CREAT|O_TRUNC);
1416 }
1417
1418 /*
1419 * Ensure we can't write on a read-only share or file.
1420 */
1421
1422 if (flags != O_RDONLY && file_existed &&
1423 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1424 DEBUG(5,("open_file_ntcreate: write access requested for "
1425 "file %s on read only %s\n",
1426 fname, !CAN_WRITE(conn) ? "share" : "file" ));
1427 errno = EACCES;
1428 return NT_STATUS_ACCESS_DENIED;
1429 }
1430
1431 status = file_new(conn, &fsp);
1432 if(!NT_STATUS_IS_OK(status)) {
1433 return status;
1434 }
1435
1436 fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
1437 fsp->share_access = share_access;
1438 fsp->fh->private_options = create_options;
1439 fsp->access_mask = open_access_mask; /* We change this to the
1440 * requested access_mask after
1441 * the open is done. */
1442 fsp->posix_open = posix_open;
1443
1444 /* Ensure no SAMBA_PRIVATE bits can be set. */
1445 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1446
1447 if (timeval_is_zero(&request_time)) {
1448 request_time = fsp->open_time;
1449 }
1450
1451 if (file_existed) {
1452 id = vfs_file_id_from_sbuf(conn, psbuf);
1453
1454 lck = get_share_mode_lock(talloc_tos(), id,
1455 conn->connectpath,
1456 fname);
1457
1458 if (lck == NULL) {
1459 file_free(fsp);
1460 DEBUG(0, ("Could not get share mode lock\n"));
1461 return NT_STATUS_SHARING_VIOLATION;
1462 }
1463
1464 /* First pass - send break only on batch oplocks. */
1465 if ((req != NULL)
1466 && delay_for_oplocks(lck, fsp, req->mid, 1,
1467 oplock_request)) {
1468 schedule_defer_open(lck, request_time, req);
1469 TALLOC_FREE(lck);
1470 file_free(fsp);
1471 return NT_STATUS_SHARING_VIOLATION;
1472 }
1473
1474 /* Use the client requested access mask here, not the one we
1475 * open with. */
1476 status = open_mode_check(conn, fname, lck,
1477 access_mask, share_access,
1478 create_options, &file_existed);
1479
1480 if (NT_STATUS_IS_OK(status)) {
1481 /* We might be going to allow this open. Check oplock
1482 * status again. */
1483 /* Second pass - send break for both batch or
1484 * exclusive oplocks. */
1485 if ((req != NULL)
1486 && delay_for_oplocks(lck, fsp, req->mid, 2,
1487 oplock_request)) {
1488 schedule_defer_open(lck, request_time, req);
1489 TALLOC_FREE(lck);
1490 file_free(fsp);
1491 return NT_STATUS_SHARING_VIOLATION;
1492 }
1493 }
1494
1495 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1496 /* DELETE_PENDING is not deferred for a second */
1497 TALLOC_FREE(lck);
1498 file_free(fsp);
1499 return status;
1500 }
1501
1502 if (!NT_STATUS_IS_OK(status)) {
1503 uint32 can_access_mask;
1504 bool can_access = True;
1505
1506 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1507
1508 /* Check if this can be done with the deny_dos and fcb
1509 * calls. */
1510 if (create_options &
1511 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1512 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1513 files_struct *fsp_dup;
1514
1515 if (req == NULL) {
1516 DEBUG(0, ("DOS open without an SMB "
1517 "request!\n"));
1518 TALLOC_FREE(lck);
1519 file_free(fsp);
1520 return NT_STATUS_INTERNAL_ERROR;
1521 }
1522
1523 /* Use the client requested access mask here,
1524 * not the one we open with. */
1525 fsp_dup = fcb_or_dos_open(conn, fname, id,
1526 req->smbpid,
1527 req->vuid,
1528 access_mask,
1529 share_access,
1530 create_options);
1531
1532 if (fsp_dup) {
1533 TALLOC_FREE(lck);
1534 file_free(fsp);
1535 if (pinfo) {
1536 *pinfo = FILE_WAS_OPENED;
1537 }
1538 conn->num_files_open++;
1539 *result = fsp_dup;
1540 return NT_STATUS_OK;
1541 }
1542 }
1543
1544 /*
1545 * This next line is a subtlety we need for
1546 * MS-Access. If a file open will fail due to share
1547 * permissions and also for security (access) reasons,
1548 * we need to return the access failed error, not the
1549 * share error. We can't open the file due to kernel
1550 * oplock deadlock (it's possible we failed above on
1551 * the open_mode_check()) so use a userspace check.
1552 */
1553
1554 if (flags & O_RDWR) {
1555 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1556 } else if (flags & O_WRONLY) {
1557 can_access_mask = FILE_WRITE_DATA;
1558 } else {
1559 can_access_mask = FILE_READ_DATA;
1560 }
1561
1562 if (((can_access_mask & FILE_WRITE_DATA) && !CAN_WRITE(conn)) ||
1563 !can_access_file(conn,fname,psbuf,can_access_mask)) {
1564 can_access = False;
1565 }
1566
1567 /*
1568 * If we're returning a share violation, ensure we
1569 * cope with the braindead 1 second delay.
1570 */
1571
1572 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1573 lp_defer_sharing_violations()) {
1574 struct timeval timeout;
1575 struct deferred_open_record state;
1576 int timeout_usecs;
1577
1578 /* this is a hack to speed up torture tests
1579 in 'make test' */
1580 timeout_usecs = lp_parm_int(SNUM(conn),
1581 "smbd","sharedelay",
1582 SHARING_VIOLATION_USEC_WAIT);
1583
1584 /* This is a relative time, added to the absolute
1585 request_time value to get the absolute timeout time.
1586 Note that if this is the second or greater time we enter
1587 this codepath for this particular request mid then
1588 request_time is left as the absolute time of the *first*
1589 time this request mid was processed. This is what allows
1590 the request to eventually time out. */
1591
1592 timeout = timeval_set(0, timeout_usecs);
1593
1594 /* Nothing actually uses state.delayed_for_oplocks
1595 but it's handy to differentiate in debug messages
1596 between a 30 second delay due to oplock break, and
1597 a 1 second delay for share mode conflicts. */
1598
1599 state.delayed_for_oplocks = False;
1600 state.id = id;
1601
1602 if ((req != NULL)
1603 && !request_timed_out(request_time,
1604 timeout)) {
1605 defer_open(lck, request_time, timeout,
1606 req, &state);
1607 }
1608 }
1609
1610 TALLOC_FREE(lck);
1611 if (can_access) {
1612 /*
1613 * We have detected a sharing violation here
1614 * so return the correct error code
1615 */
1616 status = NT_STATUS_SHARING_VIOLATION;
1617 } else {
1618 status = NT_STATUS_ACCESS_DENIED;
1619 }
1620 file_free(fsp);
1621 return status;
1622 }
1623
1624 /*
1625 * We exit this block with the share entry *locked*.....
1626 */
1627 }
1628
1629 SMB_ASSERT(!file_existed || (lck != NULL));
1630
1631 /*
1632 * Ensure we pay attention to default ACLs on directories if required.
1633 */
1634
1635 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1636 (def_acl = directory_has_default_acl(conn, parent_dir))) {
1637 unx_mode = 0777;
1638 }
1639
1640 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1641 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1642 (unsigned int)flags, (unsigned int)flags2,
1643 (unsigned int)unx_mode, (unsigned int)access_mask,
1644 (unsigned int)open_access_mask));
1645
1646 /*
1647 * open_file strips any O_TRUNC flags itself.
1648 */
1649
1650 fsp_open = open_file(fsp, conn, req, parent_dir, newname, fname, psbuf,
1651 flags|flags2, unx_mode, access_mask,
1652 open_access_mask);
1653
1654 if (!NT_STATUS_IS_OK(fsp_open)) {
1655 if (lck != NULL) {
1656 TALLOC_FREE(lck);
1657 }
1658 file_free(fsp);
1659 return fsp_open;
1660 }
1661
1662 if (!file_existed) {
1663
1664 /*
1665 * Deal with the race condition where two smbd's detect the
1666 * file doesn't exist and do the create at the same time. One
1667 * of them will win and set a share mode, the other (ie. this
1668 * one) should check if the requested share mode for this
1669 * create is allowed.
1670 */
1671
1672 /*
1673 * Now the file exists and fsp is successfully opened,
1674 * fsp->dev and fsp->inode are valid and should replace the
1675 * dev=0,inode=0 from a non existent file. Spotted by
1676 * Nadav Danieli <nadavd@exanet.com>. JRA.
1677 */
1678
1679 id = fsp->file_id;
1680
1681 lck = get_share_mode_lock(talloc_tos(), id,
1682 conn->connectpath,
1683 fname);
1684
1685 if (lck == NULL) {
1686 DEBUG(0, ("open_file_ntcreate: Could not get share "
1687 "mode lock for %s\n", fname));
1688 fd_close(fsp);
1689 file_free(fsp);
1690 return NT_STATUS_SHARING_VIOLATION;
1691 }
1692
1693 /* First pass - send break only on batch oplocks. */
1694 if ((req != NULL)
1695 && delay_for_oplocks(lck, fsp, req->mid, 1,
1696 oplock_request)) {
1697 schedule_defer_open(lck, request_time, req);
1698 TALLOC_FREE(lck);
1699 fd_close(fsp);
1700 file_free(fsp);
1701 return NT_STATUS_SHARING_VIOLATION;
1702 }
1703
1704 status = open_mode_check(conn, fname, lck,
1705 access_mask, share_access,
1706 create_options, &file_existed);
1707
1708 if (NT_STATUS_IS_OK(status)) {
1709 /* We might be going to allow this open. Check oplock
1710 * status again. */
1711 /* Second pass - send break for both batch or
1712 * exclusive oplocks. */
1713 if ((req != NULL)
1714 && delay_for_oplocks(lck, fsp, req->mid, 2,
1715 oplock_request)) {
1716 schedule_defer_open(lck, request_time, req);
1717 TALLOC_FREE(lck);
1718 fd_close(fsp);
1719 file_free(fsp);
1720 return NT_STATUS_SHARING_VIOLATION;
1721 }
1722 }
1723
1724 if (!NT_STATUS_IS_OK(status)) {
1725 struct deferred_open_record state;
1726
1727 fd_close(fsp);
1728 file_free(fsp);
1729
1730 state.delayed_for_oplocks = False;
1731 state.id = id;
1732
1733 /* Do it all over again immediately. In the second
1734 * round we will find that the file existed and handle
1735 * the DELETE_PENDING and FCB cases correctly. No need
1736 * to duplicate the code here. Essentially this is a
1737 * "goto top of this function", but don't tell
1738 * anybody... */
1739
1740 if (req != NULL) {
1741 defer_open(lck, request_time, timeval_zero(),
1742 req, &state);
1743 }
1744 TALLOC_FREE(lck);
1745 return status;
1746 }
1747
1748 /*
1749 * We exit this block with the share entry *locked*.....
1750 */
1751
1752 }
1753
1754 SMB_ASSERT(lck != NULL);
1755
1756 /* note that we ignore failure for the following. It is
1757 basically a hack for NFS, and NFS will never set one of
1758 these only read them. Nobody but Samba can ever set a deny
1759 mode and we have already checked our more authoritative
1760 locking database for permission to set this deny mode. If
1761 the kernel refuses the operations then the kernel is wrong.
1762 note that GPFS supports it as well - jmcd */
1763
1764 if (fsp->fh->fd != -1) {
1765 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access);
1766 if(ret_flock == -1 ){
1767
1768 TALLOC_FREE(lck);
1769 fd_close(fsp);
1770 file_free(fsp);
1771
1772 return NT_STATUS_SHARING_VIOLATION;
1773 }
1774 }
1775
1776 /*
1777 * At this point onwards, we can guarentee that the share entry
1778 * is locked, whether we created the file or not, and that the
1779 * deny mode is compatible with all current opens.
1780 */
1781
1782 /*
1783 * If requested, truncate the file.
1784 */
1785
1786 if (flags2&O_TRUNC) {
1787 /*
1788 * We are modifing the file after open - update the stat
1789 * struct..
1790 */
1791 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
1792 (SMB_VFS_FSTAT(fsp, psbuf)==-1)) {
1793 status = map_nt_error_from_unix(errno);
1794 TALLOC_FREE(lck);
1795 fd_close(fsp);
1796 file_free(fsp);
1797 return status;
1798 }
1799 }
1800
1801 /* Record the options we were opened with. */
1802 fsp->share_access = share_access;
1803 fsp->fh->private_options = create_options;
1804 fsp->access_mask = access_mask;
1805
1806 if (file_existed) {
1807 /* stat opens on existing files don't get oplocks. */
1808 if (is_stat_open(open_access_mask)) {
1809 fsp->oplock_type = NO_OPLOCK;
1810 }
1811
1812 if (!(flags2 & O_TRUNC)) {
1813 info = FILE_WAS_OPENED;
1814 } else {
1815 info = FILE_WAS_OVERWRITTEN;
1816 }
1817 } else {
1818 info = FILE_WAS_CREATED;
1819 }
1820
1821 if (pinfo) {
1822 *pinfo = info;
1823 }
1824
1825 /*
1826 * Setup the oplock info in both the shared memory and
1827 * file structs.
1828 */
1829
1830 if ((fsp->oplock_type != NO_OPLOCK) &&
1831 (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK)) {
1832 if (!set_file_oplock(fsp, fsp->oplock_type)) {
1833 /* Could not get the kernel oplock */
1834 fsp->oplock_type = NO_OPLOCK;
1835 }
1836 }
1837
1838 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
1839 new_file_created = True;
1840 }
1841
1842 set_share_mode(lck, fsp, current_user.ut.uid, 0, fsp->oplock_type, new_file_created);
1843
1844 /* Handle strange delete on close create semantics. */
1845 if ((create_options & FILE_DELETE_ON_CLOSE)
1846 && (is_ntfs_stream_name(fname)
1847 || can_set_initial_delete_on_close(lck))) {
1848 status = can_set_delete_on_close(fsp, True, new_dos_attributes);
1849
1850 if (!NT_STATUS_IS_OK(status)) {
1851 /* Remember to delete the mode we just added. */
1852 del_share_mode(lck, fsp);
1853 TALLOC_FREE(lck);
1854 fd_close(fsp);
1855 file_free(fsp);
1856 return status;
1857 }
1858 /* Note that here we set the *inital* delete on close flag,
1859 not the regular one. The magic gets handled in close. */
1860 fsp->initial_delete_on_close = True;
1861 }
1862
1863 if (new_file_created) {
1864 /* Files should be initially set as archive */
1865 if (lp_map_archive(SNUM(conn)) ||
1866 lp_store_dos_attributes(SNUM(conn))) {
1867 if (!posix_open) {
1868 SMB_STRUCT_STAT tmp_sbuf;
1869 SET_STAT_INVALID(tmp_sbuf);
1870 if (file_set_dosmode(
1871 conn, fname,
1872 new_dos_attributes | aARCH,
1873 &tmp_sbuf, parent_dir,
1874 true) == 0) {
1875 unx_mode = tmp_sbuf.st_mode;
1876 }
1877 }
1878 }
1879 }
1880
1881 /*
1882 * Take care of inherited ACLs on created files - if default ACL not
1883 * selected.
1884 */
1885
1886 if (!posix_open && !file_existed && !def_acl) {
1887
1888 int saved_errno = errno; /* We might get ENOSYS in the next
1889 * call.. */
1890
1891 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
1892 errno == ENOSYS) {
1893 errno = saved_errno; /* Ignore ENOSYS */
1894 }
1895
1896 } else if (new_unx_mode) {
1897
1898 int ret = -1;
1899
1900 /* Attributes need changing. File already existed. */
1901
1902 {
1903 int saved_errno = errno; /* We might get ENOSYS in the
1904 * next call.. */
1905 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
1906
1907 if (ret == -1 && errno == ENOSYS) {
1908 errno = saved_errno; /* Ignore ENOSYS */
1909 } else {
1910 DEBUG(5, ("open_file_ntcreate: reset "
1911 "attributes of file %s to 0%o\n",
1912 fname, (unsigned int)new_unx_mode));
1913 ret = 0; /* Don't do the fchmod below. */
1914 }
1915 }
1916
1917 if ((ret == -1) &&
1918 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
1919 DEBUG(5, ("open_file_ntcreate: failed to reset "
1920 "attributes of file %s to 0%o\n",
1921 fname, (unsigned int)new_unx_mode));
1922 }
1923
1924 /* If this is a successful open, we must remove any deferred open
1925 * records. */
1926 if (req != NULL) {
1927 del_deferred_open_entry(lck, req->mid);
1928 }
1929 TALLOC_FREE(lck);
1930
1931 conn->num_files_open++;
1932
1933 *result = fsp;
1934 return NT_STATUS_OK;
1935 }
1936
1937 /****************************************************************************
1938 Open a file for for write to ensure that we can fchmod it.
1939 ****************************************************************************/
1940
1941 NTSTATUS open_file_fchmod(connection_struct *conn, const char *fname,
1942 SMB_STRUCT_STAT *psbuf, files_struct **result)
1943 {
1944 files_struct *fsp = NULL;
1945 NTSTATUS status;
1946
1947 if (!VALID_STAT(*psbuf)) {
1948 return NT_STATUS_INVALID_PARAMETER;
1949 }
1950
1951 status = file_new(conn, &fsp);
1952 if(!NT_STATUS_IS_OK(status)) {
1953 return status;
1954 }
1955
1956 /* note! we must use a non-zero desired access or we don't get
1957 a real file descriptor. Oh what a twisted web we weave. */
1958 status = open_file(fsp, conn, NULL, NULL, NULL, fname, psbuf, O_WRONLY,
1959 0, FILE_WRITE_DATA, FILE_WRITE_DATA);
1960
1961 /*
1962 * This is not a user visible file open.
1963 * Don't set a share mode and don't increment
1964 * the conn->num_files_open.
1965 */
1966
1967 if (!NT_STATUS_IS_OK(status)) {
1968 file_free(fsp);
1969 return status;
1970 }
1971
1972 *result = fsp;
1973 return NT_STATUS_OK;
1974 }
1975
1976 /****************************************************************************
1977 Close the fchmod file fd - ensure no locks are lost.
1978 ****************************************************************************/
1979
1980 NTSTATUS close_file_fchmod(files_struct *fsp)
1981 {
1982 NTSTATUS status = fd_close(fsp);
1983 file_free(fsp);
1984 return status;
1985 }
1986
1987 static NTSTATUS mkdir_internal(connection_struct *conn,
1988 const char *name,
1989 uint32 file_attributes,
1990 SMB_STRUCT_STAT *psbuf)
1991 {
1992 mode_t mode;
1993 char *parent_dir;
1994 const char *dirname;
1995 NTSTATUS status;
1996 bool posix_open = false;
1997
1998 if(!CAN_WRITE(conn)) {
1999 DEBUG(5,("mkdir_internal: failing create on read-only share "
2000 "%s\n", lp_servicename(SNUM(conn))));
2001 return NT_STATUS_ACCESS_DENIED;
2002 }
2003
2004 status = check_name(conn, name);
2005 if (!NT_STATUS_IS_OK(status)) {
2006 return status;
2007 }
2008
2009 if (!parent_dirname_talloc(talloc_tos(), name, &parent_dir,
2010 &dirname)) {
2011 return NT_STATUS_NO_MEMORY;
2012 }
2013
2014 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2015 posix_open = true;
2016 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2017 } else {
2018 mode = unix_mode(conn, aDIR, name, parent_dir);
2019 }
2020
2021 if (SMB_VFS_MKDIR(conn, name, mode) != 0) {
2022 return map_nt_error_from_unix(errno);
2023 }
2024
2025 /* Ensure we're checking for a symlink here.... */
2026 /* We don't want to get caught by a symlink racer. */
2027
2028 if (SMB_VFS_LSTAT(conn, name, psbuf) == -1) {
2029 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2030 name, strerror(errno)));
2031 return map_nt_error_from_unix(errno);
2032 }
2033
2034 if (!S_ISDIR(psbuf->st_mode)) {
2035 DEBUG(0, ("Directory just '%s' created is not a directory\n",
2036 name));
2037 return NT_STATUS_ACCESS_DENIED;
2038 }
2039
2040 if (lp_store_dos_attributes(SNUM(conn))) {
2041 if (!posix_open) {
2042 file_set_dosmode(conn, name,
2043 file_attributes | aDIR, NULL,
2044 parent_dir,
2045 true);
2046 }
2047 }
2048
2049 if (lp_inherit_perms(SNUM(conn))) {
2050 inherit_access_acl(conn, parent_dir, name, mode);
2051 }
2052
2053 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2054 /*
2055 * Check if high bits should have been set,
2056 * then (if bits are missing): add them.
2057 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2058 * dir.
2059 */
2060 if (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO) && (mode & ~psbuf->st_mode)) {
2061 SMB_VFS_CHMOD(conn, name,
2062 psbuf->st_mode | (mode & ~psbuf->st_mode));
2063 }
2064 }
2065
2066 /* Change the owner if required. */
2067 if (lp_inherit_owner(SNUM(conn))) {
2068 change_dir_owner_to_parent(conn, parent_dir, name, psbuf);
2069 }
2070
2071 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2072 name);
2073
2074 return NT_STATUS_OK;
2075 }
2076
2077 /****************************************************************************
2078 Open a directory from an NT SMB call.
2079 ****************************************************************************/
2080
2081 NTSTATUS open_directory(connection_struct *conn,
2082 struct smb_request *req,
2083 const char *fname,
2084 SMB_STRUCT_STAT *psbuf,
2085 uint32 access_mask,
2086 uint32 share_access,
2087 uint32 create_disposition,
2088 uint32 create_options,
2089 uint32 file_attributes,
2090 int *pinfo,
2091 files_struct **result)
2092 {
2093 files_struct *fsp = NULL;
2094 bool dir_existed = VALID_STAT(*psbuf) ? True : False;
2095 struct share_mode_lock *lck = NULL;
2096 NTSTATUS status;
2097 int info = 0;
2098
2099 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2100 "share_access = 0x%x create_options = 0x%x, "
2101 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2102 fname,
2103 (unsigned int)access_mask,
2104 (unsigned int)share_access,
2105 (unsigned int)create_options,
2106 (unsigned int)create_disposition,
2107 (unsigned int)file_attributes));
2108
2109 if (is_ntfs_stream_name(fname)) {
2110 DEBUG(2, ("open_directory: %s is a stream name!\n", fname));
2111 return NT_STATUS_NOT_A_DIRECTORY;
2112 }
2113
2114 switch( create_disposition ) {
2115 case FILE_OPEN:
2116
2117 info = FILE_WAS_OPENED;
2118
2119 /*
2120 * We want to follow symlinks here.
2121 */
2122
2123 if (SMB_VFS_STAT(conn, fname, psbuf) != 0) {
2124 return map_nt_error_from_unix(errno);
2125 }
2126
2127 break;
2128
2129 case FILE_CREATE:
2130
2131 /* If directory exists error. If directory doesn't
2132 * exist create. */
2133
2134 status = mkdir_internal(conn,
2135 fname,
2136 file_attributes,
2137 psbuf);
2138
2139 if (!NT_STATUS_IS_OK(status)) {
2140 DEBUG(2, ("open_directory: unable to create "
2141 "%s. Error was %s\n", fname,
2142 nt_errstr(status)));
2143 return status;
2144 }
2145
2146 info = FILE_WAS_CREATED;
2147 break;
2148
2149 case FILE_OPEN_IF:
2150 /*
2151 * If directory exists open. If directory doesn't
2152 * exist create.
2153 */
2154
2155 status = mkdir_internal(conn,
2156 fname,
2157 file_attributes,
2158 psbuf);
2159
2160 if (NT_STATUS_IS_OK(status)) {
2161 info = FILE_WAS_CREATED;
2162 }
2163
2164 if (NT_STATUS_EQUAL(status,
2165 NT_STATUS_OBJECT_NAME_COLLISION)) {
2166 info = FILE_WAS_OPENED;
2167 status = NT_STATUS_OK;
2168 }
2169
2170 break;
2171
2172 case FILE_SUPERSEDE:
2173 case FILE_OVERWRITE:
2174 case FILE_OVERWRITE_IF:
2175 default:
2176 DEBUG(5,("open_directory: invalid create_disposition "
2177 "0x%x for directory %s\n",
2178 (unsigned int)create_disposition, fname));
2179 return NT_STATUS_INVALID_PARAMETER;
2180 }
2181
2182 if(!S_ISDIR(psbuf->st_mode)) {
2183 DEBUG(5,("open_directory: %s is not a directory !\n",
2184 fname ));
2185 return NT_STATUS_NOT_A_DIRECTORY;
2186 }
2187
2188 status = file_new(conn, &fsp);
2189 if(!NT_STATUS_IS_OK(status)) {
2190 return status;
2191 }
2192
2193 /*
2194 * Setup the files_struct for it.
2195 */
2196
2197 fsp->mode = psbuf->st_mode;
2198 fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
2199 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2200 fsp->file_pid = req ? req->smbpid : 0;
2201 fsp->can_lock = False;
2202 fsp->can_read = False;
2203 fsp->can_write = False;
2204
2205 fsp->share_access = share_access;
2206 fsp->fh->private_options = create_options;
2207 fsp->access_mask = access_mask;
2208
2209 fsp->print_file = False;
2210 fsp->modified = False;
2211 fsp->oplock_type = NO_OPLOCK;
2212 fsp->sent_oplock_break = NO_BREAK_SENT;
2213 fsp->is_directory = True;
2214 fsp->is_stat = False;
2215 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2216
2217 string_set(&fsp->fsp_name,fname);
2218
2219 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2220 conn->connectpath,
2221 fname);
2222
2223 if (lck == NULL) {
2224 DEBUG(0, ("open_directory: Could not get share mode lock for %s\n", fname));
2225 file_free(fsp);
2226 return NT_STATUS_SHARING_VIOLATION;
2227 }
2228
2229 status = open_mode_check(conn, fname, lck,
2230 access_mask, share_access,
2231 create_options, &dir_existed);
2232
2233 if (!NT_STATUS_IS_OK(status)) {
2234 TALLOC_FREE(lck);
2235 file_free(fsp);
2236 return status;
2237 }
2238
2239 set_share_mode(lck, fsp, current_user.ut.uid, 0, NO_OPLOCK, True);
2240
2241 /* For directories the delete on close bit at open time seems
2242 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2243 if (create_options & FILE_DELETE_ON_CLOSE) {
2244 status = can_set_delete_on_close(fsp, True, 0);
2245 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2246 TALLOC_FREE(lck);
2247 file_free(fsp);
2248 return status;
2249 }
2250
2251 if (NT_STATUS_IS_OK(status)) {
2252 /* Note that here we set the *inital* delete on close flag,
2253 not the regular one. The magic gets handled in close. */
2254 fsp->initial_delete_on_close = True;
2255 }
2256 }
2257
2258 TALLOC_FREE(lck);
2259
2260 if (pinfo) {
2261 *pinfo = info;
2262 }
2263
2264 conn->num_files_open++;
2265
2266 *result = fsp;
2267 return NT_STATUS_OK;
2268 }
2269
2270 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req, const char *directory)
2271 {
2272 NTSTATUS status;
2273 SMB_STRUCT_STAT sbuf;
2274 files_struct *fsp;
2275
2276 SET_STAT_INVALID(sbuf);
2277
2278 status = open_directory(conn, req, directory, &sbuf,
2279 FILE_READ_ATTRIBUTES, /* Just a stat open */
2280 FILE_SHARE_NONE, /* Ignored for stat opens */
2281 FILE_CREATE,
2282 0,
2283 FILE_ATTRIBUTE_DIRECTORY,
2284 NULL,
2285 &fsp);
2286
2287 if (NT_STATUS_IS_OK(status)) {
2288 close_file(fsp, NORMAL_CLOSE);
2289 }
2290
2291 return status;
2292 }
2293
2294 /****************************************************************************
2295 Open a pseudo-file (no locking checks - a 'stat' open).
2296 ****************************************************************************/
2297
2298 NTSTATUS open_file_stat(connection_struct *conn, struct smb_request *req,
2299 const char *fname, SMB_STRUCT_STAT *psbuf,
2300 files_struct **result)
2301 {
2302 files_struct *fsp = NULL;
2303 NTSTATUS status;
2304
2305 if (!VALID_STAT(*psbuf)) {
2306 return NT_STATUS_INVALID_PARAMETER;
2307 }
2308
2309 /* Can't 'stat' open directories. */
2310 if(S_ISDIR(psbuf->st_mode)) {
2311 return NT_STATUS_FILE_IS_A_DIRECTORY;
2312 }
2313
2314 status = file_new(conn, &fsp);
2315 if(!NT_STATUS_IS_OK(status)) {
2316 return status;
2317 }
2318
2319 DEBUG(5,("open_file_stat: 'opening' file %s\n", fname));
2320
2321 /*
2322 * Setup the files_struct for it.
2323 */
2324
2325 fsp->mode = psbuf->st_mode;
2326 fsp->file_id = vfs_file_id_from_sbuf(conn, psbuf);
2327 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2328 fsp->file_pid = req ? req->smbpid : 0;
2329 fsp->can_lock = False;
2330 fsp->can_read = False;
2331 fsp->can_write = False;
2332 fsp->print_file = False;
2333 fsp->modified = False;
2334 fsp->oplock_type = NO_OPLOCK;
2335 fsp->sent_oplock_break = NO_BREAK_SENT;
2336 fsp->is_directory = False;
2337 fsp->is_stat = True;
2338 string_set(&fsp->fsp_name,fname);
2339
2340 conn->num_files_open++;
2341
2342 *result = fsp;
2343 return NT_STATUS_OK;
2344 }
2345
2346 /****************************************************************************
2347 Receive notification that one of our open files has been renamed by another
2348 smbd process.
2349 ****************************************************************************/
2350
2351 void msg_file_was_renamed(struct messaging_context *msg,
2352 void *private_data,
2353 uint32_t msg_type,
2354 struct server_id server_id,
2355 DATA_BLOB *data)
2356 {
2357 files_struct *fsp;
2358 char *frm = (char *)data->data;
2359 struct file_id id;
2360 const char *sharepath;
2361 const char *newname;
2362 size_t sp_len;
2363
2364 if (data->data == NULL
2365 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2366 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
2367 (int)data->length));
2368 return;
2369 }
2370
2371 /* Unpack the message. */
2372 pull_file_id_16(frm, &id);
2373 sharepath = &frm[16];
2374 newname = sharepath + strlen(sharepath) + 1;
2375 sp_len = strlen(sharepath);
2376
2377 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2378 "file_id %s\n",
2379 sharepath, newname, file_id_string_tos(&id)));
2380
2381 for(fsp = file_find_di_first(id); fsp; fsp = file_find_di_next(fsp)) {
2382 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2383 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2384 fsp->fnum, fsp->fsp_name, newname ));
2385 string_set(&fsp->fsp_name, newname);
2386 } else {
2387 /* TODO. JRA. */
2388 /* Now we have the complete path we can work out if this is
2389 actually within this share and adjust newname accordingly. */
2390 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2391 "not sharepath %s) "
2392 "fnum %d from %s -> %s\n",
2393 fsp->conn->connectpath,
2394 sharepath,
2395 fsp->fnum,
2396 fsp->fsp_name,
2397 newname ));
2398 }
2399 }
2400 }
2401
2402 struct case_semantics_state {
2403 connection_struct *conn;
2404 bool case_sensitive;
2405 bool case_preserve;
2406 bool short_case_preserve;
2407 };
2408
2409 /****************************************************************************
2410 Restore case semantics.
2411 ****************************************************************************/
2412 static int restore_case_semantics(struct case_semantics_state *state)
2413 {
2414 state->conn->case_sensitive = state->case_sensitive;
2415 state->conn->case_preserve = state->case_preserve;
2416 state->conn->short_case_preserve = state->short_case_preserve;
2417 return 0;
2418 }
2419
2420 /****************************************************************************
2421 Save case semantics.
2422 ****************************************************************************/
2423 static struct case_semantics_state *set_posix_case_semantics(TALLOC_CTX *mem_ctx,
2424 connection_struct *conn)
2425 {
2426 struct case_semantics_state *result;
2427
2428 if (!(result = talloc(mem_ctx, struct case_semantics_state))) {
2429 DEBUG(0, ("talloc failed\n"));
2430 return NULL;
2431 }
2432
2433 result->conn = conn;
2434 result->case_sensitive = conn->case_sensitive;
2435 result->case_preserve = conn->case_preserve;
2436 result->short_case_preserve = conn->short_case_preserve;
2437
2438 /* Set to POSIX. */
2439 conn->case_sensitive = True;
2440 conn->case_preserve = True;
2441 conn->short_case_preserve = True;
2442
2443 talloc_set_destructor(result, restore_case_semantics);
2444
2445 return result;
2446 }
2447
2448 /*
2449 * If a main file is opened for delete, all streams need to be checked for
2450 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
2451 * If that works, delete them all by setting the delete on close and close.
2452 */
2453
2454 static NTSTATUS open_streams_for_delete(connection_struct *conn,
2455 const char *fname)
2456 {
2457 struct stream_struct *stream_info;
2458 files_struct **streams;
2459 int i;
2460 unsigned int num_streams;
2461 TALLOC_CTX *frame = talloc_stackframe();
2462 NTSTATUS status;
2463
2464 status = SMB_VFS_STREAMINFO(conn, NULL, fname, talloc_tos(),
2465 &num_streams, &stream_info);
2466
2467 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)) {
2468 DEBUG(10, ("no streams around\n"));
2469 TALLOC_FREE(frame);
2470 return NT_STATUS_OK;
2471 }
2472
2473 if (!NT_STATUS_IS_OK(status)) {
2474 DEBUG(10, ("SMB_VFS_STREAMINFO failed: %s\n",
2475 nt_errstr(status)));
2476 goto fail;
2477 }
2478
2479 DEBUG(10, ("open_streams_for_delete found %d streams\n",
2480 num_streams));
2481
2482 if (num_streams == 0) {
2483 TALLOC_FREE(frame);
2484 return NT_STATUS_OK;
2485 }
2486
2487 streams = TALLOC_ARRAY(talloc_tos(), files_struct *, num_streams);
2488 if (streams == NULL) {
2489 DEBUG(0, ("talloc failed\n"));
2490 status = NT_STATUS_NO_MEMORY;
2491 goto fail;
2492 }
2493
2494 for (i=0; i<num_streams; i++) {
2495 char *streamname;
2496
2497 if (strequal(stream_info[i].name, "::$DATA")) {
2498 streams[i] = NULL;
2499 continue;
2500 }
2501
2502 streamname = talloc_asprintf(talloc_tos(), "%s%s", fname,
2503 stream_info[i].name);
2504
2505 if (streamname == NULL) {
2506 DEBUG(0, ("talloc_aprintf failed\n"));
2507 status = NT_STATUS_NO_MEMORY;
2508 goto fail;
2509 }
2510
2511 status = create_file_unixpath
2512 (conn, /* conn */
2513 NULL, /* req */
2514 streamname, /* fname */
2515 DELETE_ACCESS, /* access_mask */
2516 FILE_SHARE_READ | FILE_SHARE_WRITE
2517 | FILE_SHARE_DELETE, /* share_access */
2518 FILE_OPEN, /* create_disposition*/
2519 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* create_options */
2520 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
2521 0, /* oplock_request */
2522 0, /* allocation_size */
2523 NULL, /* sd */
2524 NULL, /* ea_list */
2525 &streams[i], /* result */
2526 NULL, /* pinfo */
2527 NULL); /* psbuf */
2528
2529 TALLOC_FREE(streamname);
2530
2531 if (!NT_STATUS_IS_OK(status)) {
2532 DEBUG(10, ("Could not open stream %s: %s\n",
2533 streamname, nt_errstr(status)));
2534 break;
2535 }
2536 }
2537
2538 /*
2539 * don't touch the variable "status" beyond this point :-)
2540 */
2541
2542 for (i -= 1 ; i >= 0; i--) {
2543 if (streams[i] == NULL) {
2544 continue;
2545 }
2546
2547 DEBUG(10, ("Closing stream # %d, %s\n", i,
2548 streams[i]->fsp_name));
2549 close_file(streams[i], NORMAL_CLOSE);
2550 }
2551
2552 fail:
2553 TALLOC_FREE(frame);
2554 return status;
2555 }
2556
2557 /*
2558 * Wrapper around open_file_ntcreate and open_directory
2559 */
2560
2561 NTSTATUS create_file_unixpath(connection_struct *conn,
2562 struct smb_request *req,
2563 const char *fname,
2564 uint32_t access_mask,
2565 uint32_t share_access,
2566 uint32_t create_disposition,
2567 uint32_t create_options,
2568 uint32_t file_attributes,
2569 uint32_t oplock_request,
2570 SMB_BIG_UINT allocation_size,
2571 struct security_descriptor *sd,
2572 struct ea_list *ea_list,
2573
2574 files_struct **result,
2575 int *pinfo,
2576 SMB_STRUCT_STAT *psbuf)
2577 {
2578 SMB_STRUCT_STAT sbuf;
2579 int info = FILE_WAS_OPENED;
2580 files_struct *base_fsp = NULL;
2581 files_struct *fsp = NULL;
2582 NTSTATUS status;
2583
2584 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
2585 "file_attributes = 0x%x, share_access = 0x%x, "
2586 "create_disposition = 0x%x create_options = 0x%x "
2587 "oplock_request = 0x%x ea_list = 0x%p, sd = 0x%p, "
2588 "fname = %s\n",
2589 (unsigned int)access_mask,
2590 (unsigned int)file_attributes,
2591 (unsigned int)share_access,
2592 (unsigned int)create_disposition,
2593 (unsigned int)create_options,
2594 (unsigned int)oplock_request,
2595 ea_list, sd, fname));
2596
2597 if (create_options & FILE_OPEN_BY_FILE_ID) {
2598 status = NT_STATUS_NOT_SUPPORTED;
2599 goto fail;
2600 }
2601
2602 if (req == NULL) {
2603 oplock_request |= INTERNAL_OPEN_ONLY;
2604 }
2605
2606 if (psbuf != NULL) {
2607 sbuf = *psbuf;
2608 }
2609 else {
2610 if (SMB_VFS_STAT(conn, fname, &sbuf) == -1) {
2611 SET_STAT_INVALID(sbuf);
2612 }
2613 }
2614
2615 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2616 && (access_mask & DELETE_ACCESS)
2617 && !is_ntfs_stream_name(fname)) {
2618 /*
2619 * We can't open a file with DELETE access if any of the
2620 * streams is open without FILE_SHARE_DELETE
2621 */
2622 status = open_streams_for_delete(conn, fname);
2623
2624 if (!NT_STATUS_IS_OK(status)) {
2625 goto fail;
2626 }
2627 }
2628
2629 /* This is the correct thing to do (check every time) but can_delete
2630 * is expensive (it may have to read the parent directory
2631 * permissions). So for now we're not doing it unless we have a strong
2632 * hint the client is really going to delete this file. If the client
2633 * is forcing FILE_CREATE let the filesystem take care of the
2634 * permissions. */
2635
2636 /* Setting FILE_SHARE_DELETE is the hint. */
2637
2638 if (lp_acl_check_permissions(SNUM(conn))
2639 && (create_disposition != FILE_CREATE)
2640 && (share_access & FILE_SHARE_DELETE)
2641 && (access_mask & DELETE_ACCESS)
2642 && (((dos_mode(conn, fname, &sbuf) & FILE_ATTRIBUTE_READONLY)
2643 && !lp_delete_readonly(SNUM(conn)))
2644 || !can_delete_file_in_directory(conn, fname))) {
2645 status = NT_STATUS_ACCESS_DENIED;
2646 goto fail;
2647 }
2648
2649 #if 0
2650 /* We need to support SeSecurityPrivilege for this. */
2651 if ((access_mask & SEC_RIGHT_SYSTEM_SECURITY) &&
2652 !user_has_privileges(current_user.nt_user_token,
2653 &se_security)) {
2654 status = NT_STATUS_PRIVILEGE_NOT_HELD;
2655 goto fail;
2656 }
2657 #endif
2658
2659 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
2660 && is_ntfs_stream_name(fname)
2661 && (!(create_options & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
2662 char *base;
2663 uint32 base_create_disposition;
2664
2665 if (create_options & FILE_DIRECTORY_FILE) {
2666 status = NT_STATUS_NOT_A_DIRECTORY;
2667 goto fail;
2668 }
2669
2670 status = split_ntfs_stream_name(talloc_tos(), fname,
2671 &base, NULL);
2672 if (!NT_STATUS_IS_OK(status)) {
2673 DEBUG(10, ("split_ntfs_stream_name failed: %s\n",
2674 nt_errstr(status)));
2675 goto fail;
2676 }
2677
2678 SMB_ASSERT(!is_ntfs_stream_name(base)); /* paranoia.. */
2679
2680 switch (create_disposition) {
2681 case FILE_OPEN:
2682 base_create_disposition = FILE_OPEN;
2683 break;
2684 default:
2685 base_create_disposition = FILE_OPEN_IF;
2686 break;
2687 }
2688
2689 status = create_file_unixpath(conn, NULL, base, 0,
2690 FILE_SHARE_READ
2691 | FILE_SHARE_WRITE
2692 | FILE_SHARE_DELETE,
2693 base_create_disposition,
2694 0, 0, 0, 0, NULL, NULL,
2695 &base_fsp, NULL, NULL);
2696 if (!NT_STATUS_IS_OK(status)) {
2697 DEBUG(10, ("create_file_unixpath for base %s failed: "
2698 "%s\n", base, nt_errstr(status)));
2699 goto fail;
2700 }
2701 }
2702
2703 /*
2704 * If it's a request for a directory open, deal with it separately.
2705 */
2706
2707 if (create_options & FILE_DIRECTORY_FILE) {
2708
2709 if (create_options & FILE_NON_DIRECTORY_FILE) {
2710 status = NT_STATUS_INVALID_PARAMETER;
2711 goto fail;
2712 }
2713
2714 /* Can't open a temp directory. IFS kit test. */
2715 if (file_attributes & FILE_ATTRIBUTE_TEMPORARY) {
2716 status = NT_STATUS_INVALID_PARAMETER;
2717 goto fail;
2718 }
2719
2720 /*
2721 * We will get a create directory here if the Win32
2722 * app specified a security descriptor in the
2723 * CreateDirectory() call.
2724 */
2725
2726 oplock_request = 0;
2727 status = open_directory(
2728 conn, req, fname, &sbuf, access_mask, share_access,
2729 create_disposition, create_options, file_attributes,
2730 &info, &fsp);
2731 } else {
2732
2733 /*
2734 * Ordinary file case.
2735 */
2736
2737 status = open_file_ntcreate(
2738 conn, req, fname, &sbuf, access_mask, share_access,
2739 create_disposition, create_options, file_attributes,
2740 oplock_request, &info, &fsp);
2741
2742 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
2743
2744 /*
2745 * Fail the open if it was explicitly a non-directory
2746 * file.
2747 */
2748
2749 if (create_options & FILE_NON_DIRECTORY_FILE) {
2750 status = NT_STATUS_FILE_IS_A_DIRECTORY;
2751 goto fail;
2752 }
2753
2754 oplock_request = 0;
2755 status = open_directory(
2756 conn, req, fname, &sbuf, access_mask,
2757 share_access, create_disposition,
2758 create_options, file_attributes,
2759 &info, &fsp);
2760 }
2761 }
2762
2763 if (!NT_STATUS_IS_OK(status)) {
2764 goto fail;
2765 }
2766
2767 /*
2768 * According to the MS documentation, the only time the security
2769 * descriptor is applied to the opened file is iff we *created* the
2770 * file; an existing file stays the same.
2771 *
2772 * Also, it seems (from observation) that you can open the file with
2773 * any access mask but you can still write the sd. We need to override
2774 * the granted access before we call set_sd
2775 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
2776 */
2777
2778 if ((sd != NULL) && (info == FILE_WAS_CREATED)
2779 && lp_nt_acl_support(SNUM(conn))) {
2780
2781 uint32_t sec_info_sent = ALL_SECURITY_INFORMATION;
2782 uint32_t saved_access_mask = fsp->access_mask;
2783
2784 if (sd->owner_sid == NULL) {
2785 sec_info_sent &= ~OWNER_SECURITY_INFORMATION;
2786 }
2787 if (sd->group_sid == NULL) {
2788 sec_info_sent &= ~GROUP_SECURITY_INFORMATION;
2789 }
2790 if (sd->sacl == NULL) {
2791 sec_info_sent &= ~SACL_SECURITY_INFORMATION;
2792 }
2793 if (sd->dacl == NULL) {
2794 sec_info_sent &= ~DACL_SECURITY_INFORMATION;
2795 }
2796
2797 fsp->access_mask = FILE_GENERIC_ALL;
2798
2799 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
2800
2801 fsp->access_mask = saved_access_mask;
2802
2803 if (!NT_STATUS_IS_OK(status)) {
2804 goto fail;
2805 }
2806 }
2807
2808 if ((ea_list != NULL) && (info == FILE_WAS_CREATED)) {
2809 status = set_ea(conn, fsp, fname, ea_list);
2810 if (!NT_STATUS_IS_OK(status)) {
2811 goto fail;
2812 }
2813 }
2814
2815 if (!fsp->is_directory && S_ISDIR(sbuf.st_mode)) {
2816 status = NT_STATUS_ACCESS_DENIED;
2817 goto fail;
2818 }
2819
2820 /* Save the requested allocation size. */
2821 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
2822 if (allocation_size
2823 && (allocation_size > sbuf.st_size)) {
2824 fsp->initial_allocation_size = smb_roundup(
2825 fsp->conn, allocation_size);
2826 if (fsp->is_directory) {
2827 /* Can't set allocation size on a directory. */
2828 status = NT_STATUS_ACCESS_DENIED;
2829 goto fail;
2830 }
2831 if (vfs_allocate_file_space(
2832 fsp, fsp->initial_allocation_size) == -1) {
2833 status = NT_STATUS_DISK_FULL;
2834 goto fail;
2835 }
2836 } else {
2837 fsp->initial_allocation_size = smb_roundup(
2838 fsp->conn, (SMB_BIG_UINT)sbuf.st_size);
2839 }
2840 }
2841
2842 DEBUG(10, ("create_file: info=%d\n", info));
2843
2844 /*
2845 * Set fsp->base_fsp late enough that we can't "goto fail" anymore. In
2846 * the fail: branch we call close_file(fsp, ERROR_CLOSE) which would
2847 * also close fsp->base_fsp which we have to also do explicitly in
2848 * this routine here, as not in all "goto fail:" we have the fsp set
2849 * up already to be initialized with the base_fsp.
2850 */
2851
2852 fsp->base_fsp = base_fsp;
2853
2854 *result = fsp;
2855 if (pinfo != NULL) {
2856 *pinfo = info;
2857 }
2858 if (psbuf != NULL) {
2859 if ((fsp->fh == NULL) || (fsp->fh->fd == -1)) {
2860 *psbuf = sbuf;
2861 }
2862 else {
2863 SMB_VFS_FSTAT(fsp, psbuf);
2864 }
2865 }
2866 return NT_STATUS_OK;
2867
2868 fail:
2869 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
2870
2871 if (fsp != NULL) {
2872 close_file(fsp, ERROR_CLOSE);
2873 fsp = NULL;
2874 }
2875 if (base_fsp != NULL) {
2876 close_file(base_fsp, ERROR_CLOSE);
2877 base_fsp = NULL;
2878 }
2879 return status;
2880 }
2881
2882 NTSTATUS create_file(connection_struct *conn,
2883 struct smb_request *req,
2884 uint16_t root_dir_fid,
2885 const char *fname,
2886 uint32_t access_mask,
2887 uint32_t share_access,
2888 uint32_t create_disposition,
2889 uint32_t create_options,
2890 uint32_t file_attributes,
2891 uint32_t oplock_request,
2892 SMB_BIG_UINT allocation_size,
2893 struct security_descriptor *sd,
2894 struct ea_list *ea_list,
2895
2896 files_struct **result,
2897 int *pinfo,
2898 SMB_STRUCT_STAT *psbuf)
2899 {
2900 struct case_semantics_state *case_state = NULL;
2901 SMB_STRUCT_STAT sbuf;
2902 int info = FILE_WAS_OPENED;
2903 files_struct *fsp = NULL;
2904 NTSTATUS status;
2905
2906 DEBUG(10,("create_file: access_mask = 0x%x "
2907 "file_attributes = 0x%x, share_access = 0x%x, "
2908 "create_disposition = 0x%x create_options = 0x%x "
2909 "oplock_request = 0x%x "
2910 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
2911 "fname = %s\n",
2912 (unsigned int)access_mask,
2913 (unsigned int)file_attributes,
2914 (unsigned int)share_access,
2915 (unsigned int)create_disposition,
2916 (unsigned int)create_options,
2917 (unsigned int)oplock_request,
2918 (unsigned int)root_dir_fid,
2919 ea_list, sd, fname));
2920
2921 /*
2922 * Get the file name.
2923 */
2924
2925 if (root_dir_fid != 0) {
2926 /*
2927 * This filename is relative to a directory fid.
2928 */
2929 char *parent_fname = NULL;
2930 files_struct *dir_fsp = file_fsp(root_dir_fid);
2931
2932 if (dir_fsp == NULL) {
2933 status = NT_STATUS_INVALID_HANDLE;
2934 goto fail;
2935 }
2936
2937 if (!dir_fsp->is_directory) {
2938
2939 /*
2940 * Check to see if this is a mac fork of some kind.
2941 */
2942
2943 if (is_ntfs_stream_name(fname)) {
2944 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
2945 goto fail;
2946 }
2947
2948 /*
2949 we need to handle the case when we get a
2950 relative open relative to a file and the
2951 pathname is blank - this is a reopen!
2952 (hint from demyn plantenberg)
2953 */
2954
2955 status = NT_STATUS_INVALID_HANDLE;
2956 goto fail;
2957 }
2958
2959 if (ISDOT(dir_fsp->fsp_name)) {
2960 /*
2961 * We're at the toplevel dir, the final file name
2962 * must not contain ./, as this is filtered out
2963 * normally by srvstr_get_path and unix_convert
2964 * explicitly rejects paths containing ./.
2965 */
2966 parent_fname = talloc_strdup(talloc_tos(), "");
2967 if (parent_fname == NULL) {
2968 status = NT_STATUS_NO_MEMORY;
2969 goto fail;
2970 }
2971 } else {
2972 size_t dir_name_len = strlen(dir_fsp->fsp_name);
2973
2974 /*
2975 * Copy in the base directory name.
2976 */
2977
2978 parent_fname = TALLOC_ARRAY(talloc_tos(), char,
2979 dir_name_len+2);
2980 if (parent_fname == NULL) {
2981 status = NT_STATUS_NO_MEMORY;
2982 goto fail;
2983 }
2984 memcpy(parent_fname, dir_fsp->fsp_name,
2985 dir_name_len+1);
2986
2987 /*
2988 * Ensure it ends in a '/'.
2989 * We used TALLOC_SIZE +2 to add space for the '/'.
2990 */
2991
2992 if(dir_name_len
2993 && (parent_fname[dir_name_len-1] != '\\')
2994 && (parent_fname[dir_name_len-1] != '/')) {
2995 parent_fname[dir_name_len] = '/';
2996 parent_fname[dir_name_len+1] = '\0';
2997 }
2998 }
2999
3000 fname = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3001 fname);
3002 if (fname == NULL) {
3003 status = NT_STATUS_NO_MEMORY;
3004 goto fail;
3005 }
3006 }
3007
3008 /*
3009 * Check to see if this is a mac fork of some kind.
3010 */
3011
3012 if (is_ntfs_stream_name(fname)) {
3013 enum FAKE_FILE_TYPE fake_file_type;
3014
3015 fake_file_type = is_fake_file(fname);
3016
3017 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3018
3019 /*
3020 * Here we go! support for changing the disk quotas
3021 * --metze
3022 *
3023 * We need to fake up to open this MAGIC QUOTA file
3024 * and return a valid FID.
3025 *
3026 * w2k close this file directly after openening xp
3027 * also tries a QUERY_FILE_INFO on the file and then
3028 * close it
3029 */
3030 status = open_fake_file(conn, fake_file_type, fname,
3031 access_mask, &fsp);
3032 if (!NT_STATUS_IS_OK(status)) {
3033 goto fail;
3034 }
3035
3036 SET_STAT_INVALID(sbuf);
3037
3038 goto done;
3039 }
3040 }
3041
3042 if ((req != NULL) && (req->flags2 & FLAGS2_DFS_PATHNAMES)) {
3043 char *resolved_fname;
3044
3045 status = resolve_dfspath(talloc_tos(), conn, true, fname,
3046 &resolved_fname);
3047
3048 if (!NT_STATUS_IS_OK(status)) {
3049 /*
3050 * For PATH_NOT_COVERED we had
3051 * reply_botherror(req, NT_STATUS_PATH_NOT_COVERED,
3052 * ERRSRV, ERRbadpath);
3053 * Need to fix in callers
3054 */
3055 goto fail;
3056 }
3057 fname = resolved_fname;
3058 }
3059
3060 /*
3061 * Check if POSIX semantics are wanted.
3062 */
3063
3064 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3065 case_state = set_posix_case_semantics(talloc_tos(), conn);
3066 file_attributes &= ~FILE_FLAG_POSIX_SEMANTICS;
3067 }
3068
3069 {
3070 char *converted_fname;
3071
3072 SET_STAT_INVALID(sbuf);
3073
3074 status = unix_convert(talloc_tos(), conn, fname, False,
3075 &converted_fname, NULL, &sbuf);
3076 if (!NT_STATUS_IS_OK(status)) {
3077 goto fail;
3078 }
3079 fname = converted_fname;
3080 }
3081
3082 /* All file access must go through check_name() */
3083
3084 status = check_name(conn, fname);
3085 if (!NT_STATUS_IS_OK(status)) {
3086 goto fail;
3087 }
3088
3089 status = create_file_unixpath(
3090 conn, req, fname, access_mask, share_access,
3091 create_disposition, create_options, file_attributes,
3092 oplock_request, allocation_size, sd, ea_list,
3093 &fsp, &info, &sbuf);
3094
3095 if (!NT_STATUS_IS_OK(status)) {
3096 goto fail;
3097 }
3098
3099 done:
3100 DEBUG(10, ("create_file: info=%d\n", info));
3101
3102 *result = fsp;
3103 if (pinfo != NULL) {
3104 *pinfo = info;
3105 }
3106 if (psbuf != NULL) {
3107 *psbuf = sbuf;
3108 }
3109 return NT_STATUS_OK;
3110
3111 fail:
3112 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3113
3114 if (fsp != NULL) {
3115 close_file(fsp, ERROR_CLOSE);
3116 fsp = NULL;
3117 }
3118 return status;
3119 }
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