source: branches/samba-3.0/source/smbd/open.c

Last change on this file was 124, checked in by Paul Smedley, 17 years ago

Update source to 3.0.28a
File size: 66.2 KB
RevLine 
[22]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 2 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, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21*/
22
23#include "includes.h"
24
25extern struct generic_mapping file_generic_mapping;
26extern struct current_user current_user;
27extern userdom_struct current_user_info;
28extern uint16 global_smbpid;
29extern BOOL global_client_failed_oplock_break;
30
31struct deferred_open_record {
32 BOOL delayed_for_oplocks;
33 SMB_DEV_T dev;
34 SMB_INO_T inode;
35};
36
37/****************************************************************************
38 fd support routines - attempt to do a dos_open.
39****************************************************************************/
40
41static NTSTATUS fd_open(struct connection_struct *conn,
42 const char *fname,
43 files_struct *fsp,
44 int flags,
45 mode_t mode)
46{
47 NTSTATUS status = NT_STATUS_OK;
48
49#ifdef O_NOFOLLOW
[39]50 /*
51 * Never follow symlinks on a POSIX client. The
52 * client should be doing this.
53 */
54
55 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
[22]56 flags |= O_NOFOLLOW;
57 }
58#endif
59
60 fsp->fh->fd = SMB_VFS_OPEN(conn,fname,fsp,flags,mode);
61 if (fsp->fh->fd == -1) {
62 status = map_nt_error_from_unix(errno);
63 }
64
65 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
66 fname, flags, (int)mode, fsp->fh->fd,
67 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
68
69 return status;
70}
71
72/****************************************************************************
73 Close the file associated with a fsp.
74****************************************************************************/
75
76NTSTATUS fd_close(struct connection_struct *conn, files_struct *fsp)
77{
78 if (fsp->fh->fd == -1) {
79 return NT_STATUS_OK; /* What we used to call a stat open. */
80 }
81 if (fsp->fh->ref_count > 1) {
82 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
83 }
84 return fd_close_posix(conn, fsp);
85}
86
87/****************************************************************************
88 Change the ownership of a file to that of the parent directory.
89 Do this by fd if possible.
90****************************************************************************/
91
92static void change_file_owner_to_parent(connection_struct *conn,
93 const char *inherit_from_dir,
94 files_struct *fsp)
95{
96 SMB_STRUCT_STAT parent_st;
97 int ret;
98
99 ret = SMB_VFS_STAT(conn, inherit_from_dir, &parent_st);
100 if (ret == -1) {
101 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
102 "directory %s. Error was %s\n",
103 inherit_from_dir, strerror(errno) ));
104 return;
105 }
106
107 become_root();
108 ret = SMB_VFS_FCHOWN(fsp, fsp->fh->fd, parent_st.st_uid, (gid_t)-1);
109 unbecome_root();
110 if (ret == -1) {
111 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
112 "file %s to parent directory uid %u. Error "
113 "was %s\n", fsp->fsp_name,
114 (unsigned int)parent_st.st_uid,
115 strerror(errno) ));
116 }
117
118 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
119 "parent directory uid %u.\n", fsp->fsp_name,
120 (unsigned int)parent_st.st_uid ));
121}
122
123static void change_dir_owner_to_parent(connection_struct *conn,
124 const char *inherit_from_dir,
125 const char *fname,
126 SMB_STRUCT_STAT *psbuf)
127{
128 pstring saved_dir;
129 SMB_STRUCT_STAT sbuf;
130 SMB_STRUCT_STAT parent_st;
131 int ret;
132
133 ret = SMB_VFS_STAT(conn, inherit_from_dir, &parent_st);
134 if (ret == -1) {
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;
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 if (!vfs_GetWd(conn,saved_dir)) {
149 DEBUG(0,("change_dir_owner_to_parent: failed to get "
150 "current working directory\n"));
151 return;
152 }
153
154 /* Chdir into the new path. */
155 if (vfs_ChDir(conn, fname) == -1) {
156 DEBUG(0,("change_dir_owner_to_parent: failed to change "
157 "current working directory to %s. Error "
158 "was %s\n", fname, strerror(errno) ));
159 goto out;
160 }
161
162 if (SMB_VFS_STAT(conn,".",&sbuf) == -1) {
163 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
164 "directory '.' (%s) Error was %s\n",
165 fname, strerror(errno)));
166 goto out;
167 }
168
169 /* Ensure we're pointing at the same place. */
170 if (sbuf.st_dev != psbuf->st_dev ||
171 sbuf.st_ino != psbuf->st_ino ||
172 sbuf.st_mode != psbuf->st_mode ) {
173 DEBUG(0,("change_dir_owner_to_parent: "
174 "device/inode/mode on directory %s changed. "
175 "Refusing to chown !\n", fname ));
176 goto out;
177 }
178
179 become_root();
180 ret = SMB_VFS_CHOWN(conn, ".", parent_st.st_uid, (gid_t)-1);
181 unbecome_root();
182 if (ret == -1) {
183 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
184 "directory %s to parent directory uid %u. "
185 "Error was %s\n", fname,
186 (unsigned int)parent_st.st_uid, strerror(errno) ));
187 goto out;
188 }
189
190 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
191 "directory %s to parent directory uid %u.\n",
192 fname, (unsigned int)parent_st.st_uid ));
193
194 out:
195
196 vfs_ChDir(conn,saved_dir);
197}
198
199/****************************************************************************
200 Open a file.
201****************************************************************************/
202
203static NTSTATUS open_file(files_struct *fsp,
204 connection_struct *conn,
205 const char *parent_dir,
206 const char *name,
207 const char *path,
208 SMB_STRUCT_STAT *psbuf,
209 int flags,
210 mode_t unx_mode,
211 uint32 access_mask, /* client requested access mask. */
212 uint32 open_access_mask) /* what we're actually using in the open. */
213{
214 NTSTATUS status = NT_STATUS_OK;
215 int accmode = (flags & O_ACCMODE);
216 int local_flags = flags;
217 BOOL file_existed = VALID_STAT(*psbuf);
218
219 fsp->fh->fd = -1;
220 errno = EPERM;
221
222 /* Check permissions */
223
224 /*
225 * This code was changed after seeing a client open request
226 * containing the open mode of (DENY_WRITE/read-only) with
227 * the 'create if not exist' bit set. The previous code
228 * would fail to open the file read only on a read-only share
229 * as it was checking the flags parameter directly against O_RDONLY,
230 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
231 * JRA.
232 */
233
234 if (!CAN_WRITE(conn)) {
235 /* It's a read-only share - fail if we wanted to write. */
236 if(accmode != O_RDONLY) {
237 DEBUG(3,("Permission denied opening %s\n", path));
238 return NT_STATUS_ACCESS_DENIED;
239 } else if(flags & O_CREAT) {
240 /* We don't want to write - but we must make sure that
241 O_CREAT doesn't create the file if we have write
242 access into the directory.
243 */
244 flags &= ~O_CREAT;
245 local_flags &= ~O_CREAT;
246 }
247 }
248
249 /*
250 * This little piece of insanity is inspired by the
251 * fact that an NT client can open a file for O_RDONLY,
252 * but set the create disposition to FILE_EXISTS_TRUNCATE.
253 * If the client *can* write to the file, then it expects to
254 * truncate the file, even though it is opening for readonly.
255 * Quicken uses this stupid trick in backup file creation...
256 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
257 * for helping track this one down. It didn't bite us in 2.0.x
258 * as we always opened files read-write in that release. JRA.
259 */
260
261 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
262 DEBUG(10,("open_file: truncate requested on read-only open "
263 "for file %s\n", path));
264 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
265 }
266
267 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
268 (!file_existed && (local_flags & O_CREAT)) ||
269 ((local_flags & O_TRUNC) == O_TRUNC) ) {
270
271 /*
272 * We can't actually truncate here as the file may be locked.
273 * open_file_ntcreate will take care of the truncate later. JRA.
274 */
275
276 local_flags &= ~O_TRUNC;
277
278#if defined(O_NONBLOCK) && defined(S_ISFIFO)
279 /*
280 * We would block on opening a FIFO with no one else on the
281 * other end. Do what we used to do and add O_NONBLOCK to the
282 * open flags. JRA.
283 */
284
285 if (file_existed && S_ISFIFO(psbuf->st_mode)) {
286 local_flags |= O_NONBLOCK;
287 }
288#endif
289
290 /* Don't create files with Microsoft wildcard characters. */
291 if ((local_flags & O_CREAT) && !file_existed &&
292 ms_has_wild(path)) {
293 return NT_STATUS_OBJECT_NAME_INVALID;
294 }
295
296 /* Actually do the open */
297 status = fd_open(conn, path, fsp, local_flags, unx_mode);
298 if (!NT_STATUS_IS_OK(status)) {
299 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
300 "(flags=%d)\n",
301 path,nt_errstr(status),local_flags,flags));
302 return status;
303 }
304
305 if ((local_flags & O_CREAT) && !file_existed) {
306
307 /* Inherit the ACL if required */
308 if (lp_inherit_perms(SNUM(conn))) {
309 inherit_access_acl(conn, parent_dir, path,
310 unx_mode);
311 }
312
313 /* Change the owner if required. */
314 if (lp_inherit_owner(SNUM(conn))) {
315 change_file_owner_to_parent(conn, parent_dir,
316 fsp);
317 }
318
319 notify_fname(conn, NOTIFY_ACTION_ADDED,
320 FILE_NOTIFY_CHANGE_FILE_NAME, path);
321 }
322
323 } else {
324 fsp->fh->fd = -1; /* What we used to call a stat open. */
325 }
326
327 if (!file_existed) {
328 int ret;
329
330 if (fsp->fh->fd == -1) {
331 ret = SMB_VFS_STAT(conn, path, psbuf);
332 } else {
333 ret = SMB_VFS_FSTAT(fsp,fsp->fh->fd,psbuf);
334 /* If we have an fd, this stat should succeed. */
335 if (ret == -1) {
336 DEBUG(0,("Error doing fstat on open file %s "
337 "(%s)\n", path,strerror(errno) ));
338 }
339 }
340
341 /* For a non-io open, this stat failing means file not found. JRA */
342 if (ret == -1) {
343 status = map_nt_error_from_unix(errno);
344 fd_close(conn, fsp);
345 return status;
346 }
347 }
348
349 /*
350 * POSIX allows read-only opens of directories. We don't
351 * want to do this (we use a different code path for this)
352 * so catch a directory open and return an EISDIR. JRA.
353 */
354
355 if(S_ISDIR(psbuf->st_mode)) {
356 fd_close(conn, fsp);
357 errno = EISDIR;
358 return NT_STATUS_FILE_IS_A_DIRECTORY;
359 }
360
361 fsp->mode = psbuf->st_mode;
362 fsp->inode = psbuf->st_ino;
363 fsp->dev = psbuf->st_dev;
364 fsp->vuid = current_user.vuid;
365 fsp->file_pid = global_smbpid;
366 fsp->can_lock = True;
367 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
368 if (!CAN_WRITE(conn)) {
369 fsp->can_write = False;
370 } else {
371 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
372 True : False;
373 }
374 fsp->print_file = False;
375 fsp->modified = False;
376 fsp->sent_oplock_break = NO_BREAK_SENT;
377 fsp->is_directory = False;
378 fsp->is_stat = False;
379 if (conn->aio_write_behind_list &&
380 is_in_path(path, conn->aio_write_behind_list, conn->case_sensitive)) {
381 fsp->aio_write_behind = True;
382 }
383
384 string_set(&fsp->fsp_name, path);
385 fsp->wcp = NULL; /* Write cache pointer. */
386
387 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
388 *current_user_info.smb_name ?
389 current_user_info.smb_name : conn->user,fsp->fsp_name,
390 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
391 conn->num_files_open + 1));
392
393 errno = 0;
394 return NT_STATUS_OK;
395}
396
397/*******************************************************************
398 Return True if the filename is one of the special executable types.
399********************************************************************/
400
401static BOOL is_executable(const char *fname)
402{
403 if ((fname = strrchr_m(fname,'.'))) {
404 if (strequal(fname,".com") ||
405 strequal(fname,".dll") ||
406 strequal(fname,".exe") ||
407 strequal(fname,".sym")) {
408 return True;
409 }
410 }
411 return False;
412}
413
414/****************************************************************************
415 Check if we can open a file with a share mode.
416 Returns True if conflict, False if not.
417****************************************************************************/
418
419static BOOL share_conflict(struct share_mode_entry *entry,
420 uint32 access_mask,
421 uint32 share_access)
422{
423 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
424 "entry->share_access = 0x%x, "
425 "entry->private_options = 0x%x\n",
426 (unsigned int)entry->access_mask,
427 (unsigned int)entry->share_access,
428 (unsigned int)entry->private_options));
429
430 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
431 (unsigned int)access_mask, (unsigned int)share_access));
432
433 if ((entry->access_mask & (FILE_WRITE_DATA|
434 FILE_APPEND_DATA|
435 FILE_READ_DATA|
436 FILE_EXECUTE|
437 DELETE_ACCESS)) == 0) {
438 DEBUG(10,("share_conflict: No conflict due to "
439 "entry->access_mask = 0x%x\n",
440 (unsigned int)entry->access_mask ));
441 return False;
442 }
443
444 if ((access_mask & (FILE_WRITE_DATA|
445 FILE_APPEND_DATA|
446 FILE_READ_DATA|
447 FILE_EXECUTE|
448 DELETE_ACCESS)) == 0) {
449 DEBUG(10,("share_conflict: No conflict due to "
450 "access_mask = 0x%x\n",
451 (unsigned int)access_mask ));
452 return False;
453 }
454
455#if 1 /* JRA TEST - Superdebug. */
456#define CHECK_MASK(num, am, right, sa, share) \
457 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
458 (unsigned int)(num), (unsigned int)(am), \
459 (unsigned int)(right), (unsigned int)(am)&(right) )); \
460 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
461 (unsigned int)(num), (unsigned int)(sa), \
462 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
463 if (((am) & (right)) && !((sa) & (share))) { \
464 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
465sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
466 (unsigned int)(share) )); \
467 return True; \
468 }
469#else
470#define CHECK_MASK(num, am, right, sa, share) \
471 if (((am) & (right)) && !((sa) & (share))) { \
472 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
473sa = 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#endif
478
479 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
480 share_access, FILE_SHARE_WRITE);
481 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
482 entry->share_access, FILE_SHARE_WRITE);
483
484 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
485 share_access, FILE_SHARE_READ);
486 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
487 entry->share_access, FILE_SHARE_READ);
488
489 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
490 share_access, FILE_SHARE_DELETE);
491 CHECK_MASK(6, access_mask, DELETE_ACCESS,
492 entry->share_access, FILE_SHARE_DELETE);
493
494 DEBUG(10,("share_conflict: No conflict.\n"));
495 return False;
496}
497
498#if defined(DEVELOPER)
499static void validate_my_share_entries(int num,
500 struct share_mode_entry *share_entry)
501{
502 files_struct *fsp;
503
504 if (!procid_is_me(&share_entry->pid)) {
505 return;
506 }
507
508 if (is_deferred_open_entry(share_entry) &&
509 !open_was_deferred(share_entry->op_mid)) {
510 pstring str;
511 pstr_sprintf(str, "Got a deferred entry without a request: "
512 "PANIC: %s\n", share_mode_str(num, share_entry));
513 smb_panic(str);
514 }
515
516 if (!is_valid_share_mode_entry(share_entry)) {
517 return;
518 }
519
520 fsp = file_find_dif(share_entry->dev, share_entry->inode,
521 share_entry->share_file_id);
522 if (!fsp) {
523 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
524 share_mode_str(num, share_entry) ));
525 smb_panic("validate_my_share_entries: Cannot match a "
526 "share entry with an open file\n");
527 }
528
529 if (is_deferred_open_entry(share_entry) ||
530 is_unused_share_mode_entry(share_entry)) {
531 goto panic;
532 }
533
534 if ((share_entry->op_type == NO_OPLOCK) &&
535 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
536 /* Someone has already written to it, but I haven't yet
537 * noticed */
538 return;
539 }
540
541 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
542 goto panic;
543 }
544
545 return;
546
547 panic:
548 {
549 pstring str;
550 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
551 share_mode_str(num, share_entry) ));
552 slprintf(str, sizeof(str)-1, "validate_my_share_entries: "
553 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
554 fsp->fsp_name, (unsigned int)fsp->oplock_type,
555 (unsigned int)share_entry->op_type );
556 smb_panic(str);
557 }
558}
559#endif
560
561static BOOL is_stat_open(uint32 access_mask)
562{
563 return (access_mask &&
564 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
565 FILE_WRITE_ATTRIBUTES))==0) &&
566 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
567 FILE_WRITE_ATTRIBUTES)) != 0));
568}
569
570/****************************************************************************
571 Deal with share modes
572 Invarient: Share mode must be locked on entry and exit.
573 Returns -1 on error, or number of share modes on success (may be zero).
574****************************************************************************/
575
576static NTSTATUS open_mode_check(connection_struct *conn,
577 const char *fname,
578 struct share_mode_lock *lck,
579 uint32 access_mask,
580 uint32 share_access,
581 uint32 create_options,
582 BOOL *file_existed)
583{
584 int i;
585
586 if(lck->num_share_modes == 0) {
587 return NT_STATUS_OK;
588 }
589
590 *file_existed = True;
591
592 if (is_stat_open(access_mask)) {
593 /* Stat open that doesn't trigger oplock breaks or share mode
594 * checks... ! JRA. */
595 return NT_STATUS_OK;
596 }
597
598 /* A delete on close prohibits everything */
599
600 if (lck->delete_on_close) {
601 return NT_STATUS_DELETE_PENDING;
602 }
603
604 /*
605 * Check if the share modes will give us access.
606 */
607
608#if defined(DEVELOPER)
609 for(i = 0; i < lck->num_share_modes; i++) {
610 validate_my_share_entries(i, &lck->share_modes[i]);
611 }
612#endif
613
614 if (!lp_share_modes(SNUM(conn))) {
615 return NT_STATUS_OK;
616 }
617
618 /* Now we check the share modes, after any oplock breaks. */
619 for(i = 0; i < lck->num_share_modes; i++) {
620
621 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
622 continue;
623 }
624
625 /* someone else has a share lock on it, check to see if we can
626 * too */
627 if (share_conflict(&lck->share_modes[i],
628 access_mask, share_access)) {
629 return NT_STATUS_SHARING_VIOLATION;
630 }
631 }
632
633 return NT_STATUS_OK;
634}
635
636static BOOL is_delete_request(files_struct *fsp) {
637 return ((fsp->access_mask == DELETE_ACCESS) &&
638 (fsp->oplock_type == NO_OPLOCK));
639}
640
641/*
642 * 1) No files open at all or internal open: Grant whatever the client wants.
643 *
644 * 2) Exclusive (or batch) oplock around: If the requested access is a delete
645 * request, break if the oplock around is a batch oplock. If it's another
646 * requested access type, break.
647 *
648 * 3) Only level2 around: Grant level2 and do nothing else.
649 */
650
651static BOOL delay_for_oplocks(struct share_mode_lock *lck,
652 files_struct *fsp,
653 int pass_number,
654 int oplock_request)
655{
656 int i;
657 struct share_mode_entry *exclusive = NULL;
658 BOOL valid_entry = False;
659 BOOL delay_it = False;
660 BOOL have_level2 = False;
661 NTSTATUS status;
662 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
663
664 if (oplock_request & INTERNAL_OPEN_ONLY) {
665 fsp->oplock_type = NO_OPLOCK;
666 }
667
668 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
669 return False;
670 }
671
672 for (i=0; i<lck->num_share_modes; i++) {
673
674 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
675 continue;
676 }
677
678 /* At least one entry is not an invalid or deferred entry. */
679 valid_entry = True;
680
681 if (pass_number == 1) {
682 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
683 SMB_ASSERT(exclusive == NULL);
684 exclusive = &lck->share_modes[i];
685 }
686 } else {
687 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
688 SMB_ASSERT(exclusive == NULL);
689 exclusive = &lck->share_modes[i];
690 }
691 }
692
693 if (lck->share_modes[i].op_type == LEVEL_II_OPLOCK) {
694 SMB_ASSERT(exclusive == NULL);
695 have_level2 = True;
696 }
697 }
698
699 if (!valid_entry) {
700 /* All entries are placeholders or deferred.
701 * Directly grant whatever the client wants. */
702 if (fsp->oplock_type == NO_OPLOCK) {
703 /* Store a level2 oplock, but don't tell the client */
704 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
705 }
706 return False;
707 }
708
709 if (exclusive != NULL) { /* Found an exclusive oplock */
710 SMB_ASSERT(!have_level2);
711 delay_it = is_delete_request(fsp) ?
712 BATCH_OPLOCK_TYPE(exclusive->op_type) : True;
713 }
714
715 if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
716 /* We can at most grant level2 as there are other
717 * level2 or NO_OPLOCK entries. */
718 fsp->oplock_type = LEVEL_II_OPLOCK;
719 }
720
721 if ((fsp->oplock_type == NO_OPLOCK) && have_level2) {
722 /* Store a level2 oplock, but don't tell the client */
723 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
724 }
725
726 if (!delay_it) {
727 return False;
728 }
729
730 /*
731 * Send a break message to the oplock holder and delay the open for
732 * our client.
733 */
734
735 DEBUG(10, ("Sending break request to PID %s\n",
736 procid_str_static(&exclusive->pid)));
737 exclusive->op_mid = get_current_mid();
738
739 /* Create the message. */
740 share_mode_entry_to_message(msg, exclusive);
741
742 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
743 don't want this set in the share mode struct pointed to by lck. */
744
745 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
746 SSVAL(msg,6,exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
747 }
748
749 status = message_send_pid(exclusive->pid, MSG_SMB_BREAK_REQUEST,
750 msg, MSG_SMB_SHARE_MODE_ENTRY_SIZE, True);
751 if (!NT_STATUS_IS_OK(status)) {
752 DEBUG(3, ("Could not send oplock break message: %s\n",
753 nt_errstr(status)));
754 }
755
756 return True;
757}
758
759static BOOL request_timed_out(struct timeval request_time,
760 struct timeval timeout)
761{
762 struct timeval now, end_time;
763 GetTimeOfDay(&now);
764 end_time = timeval_sum(&request_time, &timeout);
765 return (timeval_compare(&end_time, &now) < 0);
766}
767
768/****************************************************************************
769 Handle the 1 second delay in returning a SHARING_VIOLATION error.
770****************************************************************************/
771
772static void defer_open(struct share_mode_lock *lck,
773 struct timeval request_time,
774 struct timeval timeout,
775 struct deferred_open_record *state)
776{
777 uint16 mid = get_current_mid();
778 int i;
779
780 /* Paranoia check */
781
782 for (i=0; i<lck->num_share_modes; i++) {
783 struct share_mode_entry *e = &lck->share_modes[i];
784
785 if (!is_deferred_open_entry(e)) {
786 continue;
787 }
788
789 if (procid_is_me(&e->pid) && (e->op_mid == mid)) {
790 DEBUG(0, ("Trying to defer an already deferred "
791 "request: mid=%d, exiting\n", mid));
792 exit_server("attempt to defer a deferred request");
793 }
794 }
795
796 /* End paranoia check */
797
798 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
799 "open entry for mid %u\n",
800 (unsigned int)request_time.tv_sec,
801 (unsigned int)request_time.tv_usec,
802 (unsigned int)mid));
803
804 if (!push_deferred_smb_message(mid, request_time, timeout,
805 (char *)state, sizeof(*state))) {
806 exit_server("push_deferred_smb_message failed");
807 }
808 add_deferred_open(lck, mid, request_time, state->dev, state->inode);
809
810 /*
811 * Push the MID of this packet on the signing queue.
812 * We only do this once, the first time we push the packet
813 * onto the deferred open queue, as this has a side effect
814 * of incrementing the response sequence number.
815 */
816
817 srv_defer_sign_response(mid);
818}
819
820
821/****************************************************************************
822 On overwrite open ensure that the attributes match.
823****************************************************************************/
824
825static BOOL open_match_attributes(connection_struct *conn,
826 const char *path,
827 uint32 old_dos_attr,
828 uint32 new_dos_attr,
829 mode_t existing_unx_mode,
830 mode_t new_unx_mode,
831 mode_t *returned_unx_mode)
832{
833 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
834
835 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
836 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
837
838 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
839 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
840 *returned_unx_mode = new_unx_mode;
841 } else {
842 *returned_unx_mode = (mode_t)0;
843 }
844
845 DEBUG(10,("open_match_attributes: file %s old_dos_attr = 0x%x, "
846 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
847 "returned_unx_mode = 0%o\n",
848 path,
849 (unsigned int)old_dos_attr,
850 (unsigned int)existing_unx_mode,
851 (unsigned int)new_dos_attr,
852 (unsigned int)*returned_unx_mode ));
853
854 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
855 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
856 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
857 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
858 return False;
859 }
860 }
861 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
862 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
863 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
864 return False;
865 }
866 }
867 return True;
868}
869
870/****************************************************************************
871 Special FCB or DOS processing in the case of a sharing violation.
872 Try and find a duplicated file handle.
873****************************************************************************/
874
875static files_struct *fcb_or_dos_open(connection_struct *conn,
876 const char *fname, SMB_DEV_T dev,
877 SMB_INO_T inode,
878 uint32 access_mask,
879 uint32 share_access,
880 uint32 create_options)
881{
882 files_struct *fsp;
883 files_struct *dup_fsp;
884
885 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
886 "file %s.\n", fname ));
887
888 for(fsp = file_find_di_first(dev, inode); fsp;
889 fsp = file_find_di_next(fsp)) {
890
891 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
892 "vuid = %u, file_pid = %u, private_options = 0x%x "
893 "access_mask = 0x%x\n", fsp->fsp_name,
894 fsp->fh->fd, (unsigned int)fsp->vuid,
895 (unsigned int)fsp->file_pid,
896 (unsigned int)fsp->fh->private_options,
897 (unsigned int)fsp->access_mask ));
898
899 if (fsp->fh->fd != -1 &&
900 fsp->vuid == current_user.vuid &&
901 fsp->file_pid == global_smbpid &&
902 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
903 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
904 (fsp->access_mask & FILE_WRITE_DATA) &&
905 strequal(fsp->fsp_name, fname)) {
906 DEBUG(10,("fcb_or_dos_open: file match\n"));
907 break;
908 }
909 }
910
911 if (!fsp) {
912 return NULL;
913 }
914
915 /* quite an insane set of semantics ... */
916 if (is_executable(fname) &&
917 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
918 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
919 return NULL;
920 }
921
922 /* We need to duplicate this fsp. */
923 if (!NT_STATUS_IS_OK(dup_file_fsp(fsp, access_mask, share_access,
924 create_options, &dup_fsp))) {
925 return NULL;
926 }
927
928 return dup_fsp;
929}
930
931/****************************************************************************
932 Open a file with a share mode - old openX method - map into NTCreate.
933****************************************************************************/
934
935BOOL map_open_params_to_ntcreate(const char *fname, int deny_mode, int open_func,
936 uint32 *paccess_mask,
937 uint32 *pshare_mode,
938 uint32 *pcreate_disposition,
939 uint32 *pcreate_options)
940{
941 uint32 access_mask;
942 uint32 share_mode;
943 uint32 create_disposition;
944 uint32 create_options = 0;
945
946 DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
947 "open_func = 0x%x\n",
948 fname, (unsigned int)deny_mode, (unsigned int)open_func ));
949
950 /* Create the NT compatible access_mask. */
951 switch (GET_OPENX_MODE(deny_mode)) {
952 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
953 case DOS_OPEN_RDONLY:
954 access_mask = FILE_GENERIC_READ;
955 break;
956 case DOS_OPEN_WRONLY:
957 access_mask = FILE_GENERIC_WRITE;
958 break;
959 case DOS_OPEN_RDWR:
960 case DOS_OPEN_FCB:
961 access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
962 break;
963 default:
964 DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
965 (unsigned int)GET_OPENX_MODE(deny_mode)));
966 return False;
967 }
968
969 /* Create the NT compatible create_disposition. */
970 switch (open_func) {
971 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
972 create_disposition = FILE_CREATE;
973 break;
974
975 case OPENX_FILE_EXISTS_OPEN:
976 create_disposition = FILE_OPEN;
977 break;
978
979 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
980 create_disposition = FILE_OPEN_IF;
981 break;
982
983 case OPENX_FILE_EXISTS_TRUNCATE:
984 create_disposition = FILE_OVERWRITE;
985 break;
986
987 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
988 create_disposition = FILE_OVERWRITE_IF;
989 break;
990
991 default:
992 /* From samba4 - to be confirmed. */
993 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
994 create_disposition = FILE_CREATE;
995 break;
996 }
997 DEBUG(10,("map_open_params_to_ntcreate: bad "
998 "open_func 0x%x\n", (unsigned int)open_func));
999 return False;
1000 }
1001
1002 /* Create the NT compatible share modes. */
1003 switch (GET_DENY_MODE(deny_mode)) {
1004 case DENY_ALL:
1005 share_mode = FILE_SHARE_NONE;
1006 break;
1007
1008 case DENY_WRITE:
1009 share_mode = FILE_SHARE_READ;
1010 break;
1011
1012 case DENY_READ:
1013 share_mode = FILE_SHARE_WRITE;
1014 break;
1015
1016 case DENY_NONE:
1017 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1018 break;
1019
1020 case DENY_DOS:
1021 create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1022 if (is_executable(fname)) {
1023 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1024 } else {
1025 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1026 share_mode = FILE_SHARE_READ;
1027 } else {
1028 share_mode = FILE_SHARE_NONE;
1029 }
1030 }
1031 break;
1032
1033 case DENY_FCB:
1034 create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1035 share_mode = FILE_SHARE_NONE;
1036 break;
1037
1038 default:
1039 DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1040 (unsigned int)GET_DENY_MODE(deny_mode) ));
1041 return False;
1042 }
1043
1044 DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1045 "share_mode = 0x%x, create_disposition = 0x%x, "
1046 "create_options = 0x%x\n",
1047 fname,
1048 (unsigned int)access_mask,
1049 (unsigned int)share_mode,
1050 (unsigned int)create_disposition,
1051 (unsigned int)create_options ));
1052
1053 if (paccess_mask) {
1054 *paccess_mask = access_mask;
1055 }
1056 if (pshare_mode) {
1057 *pshare_mode = share_mode;
1058 }
1059 if (pcreate_disposition) {
1060 *pcreate_disposition = create_disposition;
1061 }
1062 if (pcreate_options) {
1063 *pcreate_options = create_options;
1064 }
1065
1066 return True;
1067
1068}
1069
1070static void schedule_defer_open(struct share_mode_lock *lck, struct timeval request_time)
1071{
1072 struct deferred_open_record state;
1073
1074 /* This is a relative time, added to the absolute
1075 request_time value to get the absolute timeout time.
1076 Note that if this is the second or greater time we enter
1077 this codepath for this particular request mid then
1078 request_time is left as the absolute time of the *first*
1079 time this request mid was processed. This is what allows
1080 the request to eventually time out. */
1081
1082 struct timeval timeout;
1083
1084 /* Normally the smbd we asked should respond within
1085 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1086 * the client did, give twice the timeout as a safety
1087 * measure here in case the other smbd is stuck
1088 * somewhere else. */
1089
1090 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1091
1092 /* Nothing actually uses state.delayed_for_oplocks
1093 but it's handy to differentiate in debug messages
1094 between a 30 second delay due to oplock break, and
1095 a 1 second delay for share mode conflicts. */
1096
1097 state.delayed_for_oplocks = True;
1098 state.dev = lck->dev;
1099 state.inode = lck->ino;
1100
1101 if (!request_timed_out(request_time, timeout)) {
1102 defer_open(lck, request_time, timeout, &state);
1103 }
1104}
1105
1106/****************************************************************************
1107 Open a file with a share mode.
1108****************************************************************************/
1109
1110NTSTATUS open_file_ntcreate(connection_struct *conn,
1111 const char *fname,
1112 SMB_STRUCT_STAT *psbuf,
1113 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1114 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1115 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1116 uint32 create_options, /* options such as delete on close. */
1117 uint32 new_dos_attributes, /* attributes used for new file. */
1118 int oplock_request, /* internal Samba oplock codes. */
1119 /* Information (FILE_EXISTS etc.) */
1120 int *pinfo,
1121 files_struct **result)
1122{
1123 int flags=0;
1124 int flags2=0;
1125 BOOL file_existed = VALID_STAT(*psbuf);
1126 BOOL def_acl = False;
1127 BOOL posix_open = False;
[39]1128 BOOL new_file_created = False;
[22]1129 SMB_DEV_T dev = 0;
1130 SMB_INO_T inode = 0;
1131 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1132 files_struct *fsp = NULL;
1133 mode_t new_unx_mode = (mode_t)0;
1134 mode_t unx_mode = (mode_t)0;
1135 int info;
1136 uint32 existing_dos_attributes = 0;
1137 struct pending_message_list *pml = NULL;
1138 uint16 mid = get_current_mid();
1139 struct timeval request_time = timeval_zero();
1140 struct share_mode_lock *lck = NULL;
1141 uint32 open_access_mask = access_mask;
1142 NTSTATUS status;
1143 int ret_flock;
1144 char *parent_dir;
1145 const char *newname;
1146
1147 if (conn->printer) {
1148 /*
1149 * Printers are handled completely differently.
1150 * Most of the passed parameters are ignored.
1151 */
1152
1153 if (pinfo) {
1154 *pinfo = FILE_WAS_CREATED;
1155 }
1156
1157 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n", fname));
1158
1159 return print_fsp_open(conn, fname, result);
1160 }
1161
1162 if (!parent_dirname_talloc(tmp_talloc_ctx(), fname, &parent_dir,
1163 &newname)) {
1164 return NT_STATUS_NO_MEMORY;
1165 }
1166
1167 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1168 posix_open = True;
1169 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1170 new_dos_attributes = 0;
1171 } else {
1172 /* We add aARCH to this as this mode is only used if the file is
1173 * created new. */
1174 unx_mode = unix_mode(conn, new_dos_attributes | aARCH, fname,
1175 parent_dir);
1176 }
1177
1178 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1179 "access_mask=0x%x share_access=0x%x "
1180 "create_disposition = 0x%x create_options=0x%x "
1181 "unix mode=0%o oplock_request=%d\n",
1182 fname, new_dos_attributes, access_mask, share_access,
1183 create_disposition, create_options, unx_mode,
1184 oplock_request));
1185
1186 if ((pml = get_open_deferred_message(mid)) != NULL) {
1187 struct deferred_open_record *state =
1188 (struct deferred_open_record *)pml->private_data.data;
1189
1190 /* Remember the absolute time of the original
1191 request with this mid. We'll use it later to
1192 see if this has timed out. */
1193
1194 request_time = pml->request_time;
1195
1196 /* Remove the deferred open entry under lock. */
1197 lck = get_share_mode_lock(NULL, state->dev, state->inode, NULL, NULL);
1198 if (lck == NULL) {
1199 DEBUG(0, ("could not get share mode lock\n"));
1200 } else {
1201 del_deferred_open_entry(lck, mid);
1202 TALLOC_FREE(lck);
1203 }
1204
1205 /* Ensure we don't reprocess this message. */
1206 remove_deferred_open_smb_message(mid);
1207 }
1208
1209 status = check_name(conn, fname);
1210 if (!NT_STATUS_IS_OK(status)) {
1211 return status;
1212 }
1213
1214 if (!posix_open) {
1215 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1216 if (file_existed) {
1217 existing_dos_attributes = dos_mode(conn, fname, psbuf);
1218 }
1219 }
1220
1221 /* ignore any oplock requests if oplocks are disabled */
1222 if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break ||
1223 IS_VETO_OPLOCK_PATH(conn, fname)) {
1224 /* Mask off everything except the private Samba bits. */
1225 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1226 }
1227
1228 /* this is for OS/2 long file names - say we don't support them */
1229 if (!lp_posix_pathnames() && strstr(fname,".+,;=[].")) {
1230 /* OS/2 Workplace shell fix may be main code stream in a later
1231 * release. */
1232 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1233 "supported.\n"));
1234 if (use_nt_status()) {
1235 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1236 }
1237 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1238 }
1239
1240 switch( create_disposition ) {
1241 /*
1242 * Currently we're using FILE_SUPERSEDE as the same as
1243 * FILE_OVERWRITE_IF but they really are
1244 * different. FILE_SUPERSEDE deletes an existing file
1245 * (requiring delete access) then recreates it.
1246 */
1247 case FILE_SUPERSEDE:
1248 /* If file exists replace/overwrite. If file doesn't
1249 * exist create. */
1250 flags2 |= (O_CREAT | O_TRUNC);
1251 break;
1252
1253 case FILE_OVERWRITE_IF:
1254 /* If file exists replace/overwrite. If file doesn't
1255 * exist create. */
1256 flags2 |= (O_CREAT | O_TRUNC);
1257 break;
1258
1259 case FILE_OPEN:
1260 /* If file exists open. If file doesn't exist error. */
1261 if (!file_existed) {
1262 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1263 "requested for file %s and file "
1264 "doesn't exist.\n", fname ));
1265 errno = ENOENT;
1266 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1267 }
1268 break;
1269
1270 case FILE_OVERWRITE:
1271 /* If file exists overwrite. If file doesn't exist
1272 * error. */
1273 if (!file_existed) {
1274 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1275 "requested for file %s and file "
1276 "doesn't exist.\n", fname ));
1277 errno = ENOENT;
1278 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1279 }
1280 flags2 |= O_TRUNC;
1281 break;
1282
1283 case FILE_CREATE:
1284 /* If file exists error. If file doesn't exist
1285 * create. */
1286 if (file_existed) {
1287 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1288 "requested for file %s and file "
1289 "already exists.\n", fname ));
1290 if (S_ISDIR(psbuf->st_mode)) {
1291 errno = EISDIR;
1292 } else {
1293 errno = EEXIST;
1294 }
1295 return map_nt_error_from_unix(errno);
1296 }
1297 flags2 |= (O_CREAT|O_EXCL);
1298 break;
1299
1300 case FILE_OPEN_IF:
1301 /* If file exists open. If file doesn't exist
1302 * create. */
1303 flags2 |= O_CREAT;
1304 break;
1305
1306 default:
1307 return NT_STATUS_INVALID_PARAMETER;
1308 }
1309
1310 /* We only care about matching attributes on file exists and
1311 * overwrite. */
1312
1313 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1314 (create_disposition == FILE_OVERWRITE_IF))) {
1315 if (!open_match_attributes(conn, fname,
1316 existing_dos_attributes,
1317 new_dos_attributes, psbuf->st_mode,
1318 unx_mode, &new_unx_mode)) {
1319 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1320 "for file %s (%x %x) (0%o, 0%o)\n",
1321 fname, existing_dos_attributes,
1322 new_dos_attributes,
1323 (unsigned int)psbuf->st_mode,
1324 (unsigned int)unx_mode ));
1325 errno = EACCES;
1326 return NT_STATUS_ACCESS_DENIED;
1327 }
1328 }
1329
1330 /* This is a nasty hack - must fix... JRA. */
1331 if (access_mask == MAXIMUM_ALLOWED_ACCESS) {
1332 open_access_mask = access_mask = FILE_GENERIC_ALL;
1333 }
1334
1335 /*
1336 * Convert GENERIC bits to specific bits.
1337 */
1338
1339 se_map_generic(&access_mask, &file_generic_mapping);
1340 open_access_mask = access_mask;
1341
1342 if (flags2 & O_TRUNC) {
1343 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1344 }
1345
1346 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1347 "access_mask=0x%x\n", fname, access_mask ));
1348
1349 /*
1350 * Note that we ignore the append flag as append does not
1351 * mean the same thing under DOS and Unix.
1352 */
1353
1354 if (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) {
1355 /* DENY_DOS opens are always underlying read-write on the
1356 file handle, no matter what the requested access mask
1357 says. */
1358 if ((create_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1359 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1360 flags = O_RDWR;
1361 } else {
1362 flags = O_WRONLY;
1363 }
1364 } else {
1365 flags = O_RDONLY;
1366 }
1367
1368 /*
1369 * Currently we only look at FILE_WRITE_THROUGH for create options.
1370 */
1371
1372#if defined(O_SYNC)
1373 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1374 flags2 |= O_SYNC;
1375 }
1376#endif /* O_SYNC */
1377
[124]1378 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
[22]1379 flags2 |= O_APPEND;
1380 }
1381
1382 if (!posix_open && !CAN_WRITE(conn)) {
1383 /*
1384 * We should really return a permission denied error if either
1385 * O_CREAT or O_TRUNC are set, but for compatibility with
1386 * older versions of Samba we just AND them out.
1387 */
1388 flags2 &= ~(O_CREAT|O_TRUNC);
1389 }
1390
1391 /*
1392 * Ensure we can't write on a read-only share or file.
1393 */
1394
1395 if (flags != O_RDONLY && file_existed &&
1396 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1397 DEBUG(5,("open_file_ntcreate: write access requested for "
1398 "file %s on read only %s\n",
1399 fname, !CAN_WRITE(conn) ? "share" : "file" ));
1400 errno = EACCES;
1401 return NT_STATUS_ACCESS_DENIED;
1402 }
1403
1404 status = file_new(conn, &fsp);
1405 if(!NT_STATUS_IS_OK(status)) {
1406 return status;
1407 }
1408
1409 fsp->dev = psbuf->st_dev;
1410 fsp->inode = psbuf->st_ino;
1411 fsp->share_access = share_access;
1412 fsp->fh->private_options = create_options;
1413 fsp->access_mask = open_access_mask; /* We change this to the
1414 * requested access_mask after
1415 * the open is done. */
1416 fsp->posix_open = posix_open;
1417
1418 /* Ensure no SAMBA_PRIVATE bits can be set. */
1419 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1420
1421 if (timeval_is_zero(&request_time)) {
1422 request_time = fsp->open_time;
1423 }
1424
1425 if (file_existed) {
1426 dev = psbuf->st_dev;
1427 inode = psbuf->st_ino;
1428
1429 lck = get_share_mode_lock(NULL, dev, inode,
1430 conn->connectpath,
1431 fname);
1432
1433 if (lck == NULL) {
1434 file_free(fsp);
1435 DEBUG(0, ("Could not get share mode lock\n"));
1436 return NT_STATUS_SHARING_VIOLATION;
1437 }
1438
1439 /* First pass - send break only on batch oplocks. */
1440 if (delay_for_oplocks(lck, fsp, 1, oplock_request)) {
1441 schedule_defer_open(lck, request_time);
1442 TALLOC_FREE(lck);
1443 file_free(fsp);
1444 return NT_STATUS_SHARING_VIOLATION;
1445 }
1446
1447 /* Use the client requested access mask here, not the one we
1448 * open with. */
1449 status = open_mode_check(conn, fname, lck,
1450 access_mask, share_access,
1451 create_options, &file_existed);
1452
1453 if (NT_STATUS_IS_OK(status)) {
1454 /* We might be going to allow this open. Check oplock
1455 * status again. */
1456 /* Second pass - send break for both batch or
1457 * exclusive oplocks. */
1458 if (delay_for_oplocks(lck, fsp, 2, oplock_request)) {
1459 schedule_defer_open(lck, request_time);
1460 TALLOC_FREE(lck);
1461 file_free(fsp);
1462 return NT_STATUS_SHARING_VIOLATION;
1463 }
1464 }
1465
1466 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1467 /* DELETE_PENDING is not deferred for a second */
1468 TALLOC_FREE(lck);
1469 file_free(fsp);
1470 return status;
1471 }
1472
1473 if (!NT_STATUS_IS_OK(status)) {
1474 uint32 can_access_mask;
1475 BOOL can_access = True;
1476
1477 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1478
1479 /* Check if this can be done with the deny_dos and fcb
1480 * calls. */
1481 if (create_options &
1482 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1483 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1484 files_struct *fsp_dup;
1485
1486 /* Use the client requested access mask here,
1487 * not the one we open with. */
1488 fsp_dup = fcb_or_dos_open(conn, fname, dev,
1489 inode, access_mask,
1490 share_access,
1491 create_options);
1492
1493 if (fsp_dup) {
1494 TALLOC_FREE(lck);
1495 file_free(fsp);
1496 if (pinfo) {
1497 *pinfo = FILE_WAS_OPENED;
1498 }
1499 conn->num_files_open++;
1500 *result = fsp_dup;
1501 return NT_STATUS_OK;
1502 }
1503 }
1504
1505 /*
1506 * This next line is a subtlety we need for
1507 * MS-Access. If a file open will fail due to share
1508 * permissions and also for security (access) reasons,
1509 * we need to return the access failed error, not the
1510 * share error. We can't open the file due to kernel
1511 * oplock deadlock (it's possible we failed above on
1512 * the open_mode_check()) so use a userspace check.
1513 */
1514
1515 if (flags & O_RDWR) {
1516 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1517 } else if (flags & O_WRONLY) {
1518 can_access_mask = FILE_WRITE_DATA;
1519 } else {
1520 can_access_mask = FILE_READ_DATA;
1521 }
1522
1523 if (((can_access_mask & FILE_WRITE_DATA) && !CAN_WRITE(conn)) ||
1524 !can_access_file(conn,fname,psbuf,can_access_mask)) {
1525 can_access = False;
1526 }
1527
1528 /*
1529 * If we're returning a share violation, ensure we
1530 * cope with the braindead 1 second delay.
1531 */
1532
1533 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1534 lp_defer_sharing_violations()) {
1535 struct timeval timeout;
1536 struct deferred_open_record state;
1537 int timeout_usecs;
1538
1539 /* this is a hack to speed up torture tests
1540 in 'make test' */
1541 timeout_usecs = lp_parm_int(SNUM(conn),
1542 "smbd","sharedelay",
1543 SHARING_VIOLATION_USEC_WAIT);
1544
1545 /* This is a relative time, added to the absolute
1546 request_time value to get the absolute timeout time.
1547 Note that if this is the second or greater time we enter
1548 this codepath for this particular request mid then
1549 request_time is left as the absolute time of the *first*
1550 time this request mid was processed. This is what allows
1551 the request to eventually time out. */
1552
1553 timeout = timeval_set(0, timeout_usecs);
1554
1555 /* Nothing actually uses state.delayed_for_oplocks
1556 but it's handy to differentiate in debug messages
1557 between a 30 second delay due to oplock break, and
1558 a 1 second delay for share mode conflicts. */
1559
1560 state.delayed_for_oplocks = False;
1561 state.dev = dev;
1562 state.inode = inode;
1563
1564 if (!request_timed_out(request_time,
1565 timeout)) {
1566 defer_open(lck, request_time, timeout,
1567 &state);
1568 }
1569 }
1570
1571 TALLOC_FREE(lck);
1572 if (can_access) {
1573 /*
1574 * We have detected a sharing violation here
1575 * so return the correct error code
1576 */
1577 status = NT_STATUS_SHARING_VIOLATION;
1578 } else {
1579 status = NT_STATUS_ACCESS_DENIED;
1580 }
1581 file_free(fsp);
1582 return status;
1583 }
1584
1585 /*
1586 * We exit this block with the share entry *locked*.....
1587 */
1588 }
1589
1590 SMB_ASSERT(!file_existed || (lck != NULL));
1591
1592 /*
1593 * Ensure we pay attention to default ACLs on directories if required.
1594 */
1595
1596 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1597 (def_acl = directory_has_default_acl(conn, parent_dir))) {
1598 unx_mode = 0777;
1599 }
1600
1601 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1602 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1603 (unsigned int)flags, (unsigned int)flags2,
1604 (unsigned int)unx_mode, (unsigned int)access_mask,
1605 (unsigned int)open_access_mask));
1606
1607 /*
1608 * open_file strips any O_TRUNC flags itself.
1609 */
1610
1611 fsp_open = open_file(fsp, conn, parent_dir, newname, fname, psbuf,
1612 flags|flags2, unx_mode, access_mask,
1613 open_access_mask);
1614
1615 if (!NT_STATUS_IS_OK(fsp_open)) {
1616 if (lck != NULL) {
1617 TALLOC_FREE(lck);
1618 }
1619 file_free(fsp);
1620 return fsp_open;
1621 }
1622
1623 if (!file_existed) {
1624
1625 /*
1626 * Deal with the race condition where two smbd's detect the
1627 * file doesn't exist and do the create at the same time. One
1628 * of them will win and set a share mode, the other (ie. this
1629 * one) should check if the requested share mode for this
1630 * create is allowed.
1631 */
1632
1633 /*
1634 * Now the file exists and fsp is successfully opened,
1635 * fsp->dev and fsp->inode are valid and should replace the
1636 * dev=0,inode=0 from a non existent file. Spotted by
1637 * Nadav Danieli <nadavd@exanet.com>. JRA.
1638 */
1639
1640 dev = fsp->dev;
1641 inode = fsp->inode;
1642
1643 lck = get_share_mode_lock(NULL, dev, inode,
1644 conn->connectpath,
1645 fname);
1646
1647 if (lck == NULL) {
1648 DEBUG(0, ("open_file_ntcreate: Could not get share "
1649 "mode lock for %s\n", fname));
1650 fd_close(conn, fsp);
1651 file_free(fsp);
1652 return NT_STATUS_SHARING_VIOLATION;
1653 }
1654
[44]1655 /* First pass - send break only on batch oplocks. */
1656 if (delay_for_oplocks(lck, fsp, 1, oplock_request)) {
1657 schedule_defer_open(lck, request_time);
1658 TALLOC_FREE(lck);
1659 fd_close(conn, fsp);
1660 file_free(fsp);
1661 return NT_STATUS_SHARING_VIOLATION;
1662 }
1663
[22]1664 status = open_mode_check(conn, fname, lck,
1665 access_mask, share_access,
1666 create_options, &file_existed);
1667
[44]1668 if (NT_STATUS_IS_OK(status)) {
1669 /* We might be going to allow this open. Check oplock
1670 * status again. */
1671 /* Second pass - send break for both batch or
1672 * exclusive oplocks. */
1673 if (delay_for_oplocks(lck, fsp, 2, oplock_request)) {
1674 schedule_defer_open(lck, request_time);
1675 TALLOC_FREE(lck);
1676 fd_close(conn, fsp);
1677 file_free(fsp);
1678 return NT_STATUS_SHARING_VIOLATION;
1679 }
1680 }
1681
[22]1682 if (!NT_STATUS_IS_OK(status)) {
1683 struct deferred_open_record state;
1684
1685 fd_close(conn, fsp);
1686 file_free(fsp);
1687
1688 state.delayed_for_oplocks = False;
1689 state.dev = dev;
1690 state.inode = inode;
1691
1692 /* Do it all over again immediately. In the second
1693 * round we will find that the file existed and handle
1694 * the DELETE_PENDING and FCB cases correctly. No need
1695 * to duplicate the code here. Essentially this is a
1696 * "goto top of this function", but don't tell
1697 * anybody... */
1698
1699 defer_open(lck, request_time, timeval_zero(),
1700 &state);
1701 TALLOC_FREE(lck);
1702 return status;
1703 }
1704
1705 /*
1706 * We exit this block with the share entry *locked*.....
1707 */
1708
1709 }
1710
1711 SMB_ASSERT(lck != NULL);
1712
1713 /* note that we ignore failure for the following. It is
1714 basically a hack for NFS, and NFS will never set one of
1715 these only read them. Nobody but Samba can ever set a deny
1716 mode and we have already checked our more authoritative
1717 locking database for permission to set this deny mode. If
1718 the kernel refuses the operations then the kernel is wrong.
1719 note that GPFS supports it as well - jmcd */
1720
1721 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, fsp->fh->fd, share_access);
1722 if(ret_flock == -1 ){
1723
1724 TALLOC_FREE(lck);
1725 fd_close(conn, fsp);
1726 file_free(fsp);
1727
1728 return NT_STATUS_SHARING_VIOLATION;
1729 }
1730
1731 /*
1732 * At this point onwards, we can guarentee that the share entry
1733 * is locked, whether we created the file or not, and that the
1734 * deny mode is compatible with all current opens.
1735 */
1736
1737 /*
1738 * If requested, truncate the file.
1739 */
1740
1741 if (flags2&O_TRUNC) {
1742 /*
1743 * We are modifing the file after open - update the stat
1744 * struct..
1745 */
1746 if ((SMB_VFS_FTRUNCATE(fsp,fsp->fh->fd,0) == -1) ||
1747 (SMB_VFS_FSTAT(fsp,fsp->fh->fd,psbuf)==-1)) {
1748 status = map_nt_error_from_unix(errno);
1749 TALLOC_FREE(lck);
1750 fd_close(conn,fsp);
1751 file_free(fsp);
1752 return status;
1753 }
1754 }
1755
1756 /* Record the options we were opened with. */
1757 fsp->share_access = share_access;
1758 fsp->fh->private_options = create_options;
1759 fsp->access_mask = access_mask;
1760
1761 if (file_existed) {
1762 /* stat opens on existing files don't get oplocks. */
1763 if (is_stat_open(open_access_mask)) {
1764 fsp->oplock_type = NO_OPLOCK;
1765 }
1766
1767 if (!(flags2 & O_TRUNC)) {
1768 info = FILE_WAS_OPENED;
1769 } else {
1770 info = FILE_WAS_OVERWRITTEN;
1771 }
1772 } else {
1773 info = FILE_WAS_CREATED;
1774 }
1775
1776 if (pinfo) {
1777 *pinfo = info;
1778 }
1779
1780 /*
1781 * Setup the oplock info in both the shared memory and
1782 * file structs.
1783 */
1784
1785 if ((fsp->oplock_type != NO_OPLOCK) &&
1786 (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK)) {
1787 if (!set_file_oplock(fsp, fsp->oplock_type)) {
1788 /* Could not get the kernel oplock */
1789 fsp->oplock_type = NO_OPLOCK;
1790 }
1791 }
1792
[39]1793 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
1794 new_file_created = True;
1795 }
[22]1796
[39]1797 set_share_mode(lck, fsp, current_user.ut.uid, 0, fsp->oplock_type, new_file_created);
[22]1798
[39]1799 /* Handle strange delete on close create semantics. */
1800 if ((create_options & FILE_DELETE_ON_CLOSE) && can_set_initial_delete_on_close(lck)) {
1801 status = can_set_delete_on_close(fsp, True, new_dos_attributes);
1802
1803 if (!NT_STATUS_IS_OK(status)) {
1804 /* Remember to delete the mode we just added. */
1805 del_share_mode(lck, fsp);
1806 TALLOC_FREE(lck);
1807 fd_close(conn,fsp);
1808 file_free(fsp);
1809 return status;
[22]1810 }
[39]1811 /* Note that here we set the *inital* delete on close flag,
1812 not the regular one. The magic gets handled in close. */
1813 fsp->initial_delete_on_close = True;
1814 }
[22]1815
[39]1816 if (new_file_created) {
[22]1817 /* Files should be initially set as archive */
1818 if (lp_map_archive(SNUM(conn)) ||
1819 lp_store_dos_attributes(SNUM(conn))) {
1820 if (!posix_open) {
[124]1821 SMB_STRUCT_STAT tmp_sbuf;
1822 SET_STAT_INVALID(tmp_sbuf);
1823 if (file_set_dosmode(
1824 conn, fname,
1825 new_dos_attributes | aARCH,
1826 &tmp_sbuf,
1827 parent_dir) == 0) {
1828 unx_mode = tmp_sbuf.st_mode;
1829 }
[22]1830 }
1831 }
1832 }
1833
1834 /*
1835 * Take care of inherited ACLs on created files - if default ACL not
1836 * selected.
1837 */
1838
1839 if (!posix_open && !file_existed && !def_acl) {
1840
1841 int saved_errno = errno; /* We might get ENOSYS in the next
1842 * call.. */
1843
1844 if (SMB_VFS_FCHMOD_ACL(fsp, fsp->fh->fd, unx_mode) == -1 &&
1845 errno == ENOSYS) {
1846 errno = saved_errno; /* Ignore ENOSYS */
1847 }
1848
1849 } else if (new_unx_mode) {
1850
1851 int ret = -1;
1852
1853 /* Attributes need changing. File already existed. */
1854
1855 {
1856 int saved_errno = errno; /* We might get ENOSYS in the
1857 * next call.. */
1858 ret = SMB_VFS_FCHMOD_ACL(fsp, fsp->fh->fd,
1859 new_unx_mode);
1860
1861 if (ret == -1 && errno == ENOSYS) {
1862 errno = saved_errno; /* Ignore ENOSYS */
1863 } else {
1864 DEBUG(5, ("open_file_ntcreate: reset "
1865 "attributes of file %s to 0%o\n",
1866 fname, (unsigned int)new_unx_mode));
1867 ret = 0; /* Don't do the fchmod below. */
1868 }
1869 }
1870
1871 if ((ret == -1) &&
1872 (SMB_VFS_FCHMOD(fsp, fsp->fh->fd, new_unx_mode) == -1))
1873 DEBUG(5, ("open_file_ntcreate: failed to reset "
1874 "attributes of file %s to 0%o\n",
1875 fname, (unsigned int)new_unx_mode));
1876 }
1877
1878 /* If this is a successful open, we must remove any deferred open
1879 * records. */
1880 del_deferred_open_entry(lck, mid);
1881 TALLOC_FREE(lck);
1882
1883 conn->num_files_open++;
1884
1885 *result = fsp;
1886 return NT_STATUS_OK;
1887}
1888
1889/****************************************************************************
1890 Open a file for for write to ensure that we can fchmod it.
1891****************************************************************************/
1892
1893NTSTATUS open_file_fchmod(connection_struct *conn, const char *fname,
1894 SMB_STRUCT_STAT *psbuf, files_struct **result)
1895{
1896 files_struct *fsp = NULL;
1897 NTSTATUS status;
1898
1899 if (!VALID_STAT(*psbuf)) {
1900 return NT_STATUS_INVALID_PARAMETER;
1901 }
1902
1903 status = file_new(conn, &fsp);
1904 if(!NT_STATUS_IS_OK(status)) {
1905 return status;
1906 }
1907
1908 /* note! we must use a non-zero desired access or we don't get
1909 a real file descriptor. Oh what a twisted web we weave. */
1910 status = open_file(fsp, conn, NULL, NULL, fname, psbuf, O_WRONLY, 0,
1911 FILE_WRITE_DATA, FILE_WRITE_DATA);
1912
1913 /*
1914 * This is not a user visible file open.
1915 * Don't set a share mode and don't increment
1916 * the conn->num_files_open.
1917 */
1918
1919 if (!NT_STATUS_IS_OK(status)) {
1920 file_free(fsp);
1921 return status;
1922 }
1923
1924 *result = fsp;
1925 return NT_STATUS_OK;
1926}
1927
1928/****************************************************************************
1929 Close the fchmod file fd - ensure no locks are lost.
1930****************************************************************************/
1931
1932NTSTATUS close_file_fchmod(files_struct *fsp)
1933{
1934 NTSTATUS status = fd_close(fsp->conn, fsp);
1935 file_free(fsp);
1936 return status;
1937}
1938
1939static NTSTATUS mkdir_internal(connection_struct *conn,
1940 const char *name,
1941 uint32 file_attributes,
1942 SMB_STRUCT_STAT *psbuf)
1943{
1944 mode_t mode;
1945 char *parent_dir;
1946 const char *dirname;
1947 NTSTATUS status;
[105]1948 BOOL posix_open = False;
[22]1949
1950 if(!CAN_WRITE(conn)) {
1951 DEBUG(5,("mkdir_internal: failing create on read-only share "
1952 "%s\n", lp_servicename(SNUM(conn))));
1953 return NT_STATUS_ACCESS_DENIED;
1954 }
1955
1956 status = check_name(conn, name);
1957 if (!NT_STATUS_IS_OK(status)) {
1958 return status;
1959 }
1960
1961 if (!parent_dirname_talloc(tmp_talloc_ctx(), name, &parent_dir,
1962 &dirname)) {
1963 return NT_STATUS_NO_MEMORY;
1964 }
1965
1966 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
[105]1967 posix_open = True;
[22]1968 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1969 } else {
1970 mode = unix_mode(conn, aDIR, name, parent_dir);
1971 }
1972
1973 if (SMB_VFS_MKDIR(conn, name, mode) != 0) {
1974 return map_nt_error_from_unix(errno);
1975 }
1976
1977 /* Ensure we're checking for a symlink here.... */
1978 /* We don't want to get caught by a symlink racer. */
1979
1980 if (SMB_VFS_LSTAT(conn, name, psbuf) == -1) {
1981 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
1982 name, strerror(errno)));
1983 return map_nt_error_from_unix(errno);
1984 }
1985
1986 if (!S_ISDIR(psbuf->st_mode)) {
1987 DEBUG(0, ("Directory just '%s' created is not a directory\n",
1988 name));
1989 return NT_STATUS_ACCESS_DENIED;
1990 }
1991
[105]1992 if (lp_store_dos_attributes(SNUM(conn))) {
1993 if (!posix_open) {
1994 file_set_dosmode(conn, name,
1995 file_attributes | aDIR, NULL,
1996 parent_dir);
1997 }
1998 }
1999
[22]2000 if (lp_inherit_perms(SNUM(conn))) {
2001 inherit_access_acl(conn, parent_dir, name, mode);
2002 }
2003
2004 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2005 /*
2006 * Check if high bits should have been set,
2007 * then (if bits are missing): add them.
2008 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2009 * dir.
2010 */
2011 if (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO) && (mode & ~psbuf->st_mode)) {
2012 SMB_VFS_CHMOD(conn, name,
2013 psbuf->st_mode | (mode & ~psbuf->st_mode));
2014 }
2015 }
2016
2017 /* Change the owner if required. */
2018 if (lp_inherit_owner(SNUM(conn))) {
2019 change_dir_owner_to_parent(conn, parent_dir, name, psbuf);
2020 }
2021
2022 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2023 name);
2024
2025 return NT_STATUS_OK;
2026}
2027
2028/****************************************************************************
2029 Open a directory from an NT SMB call.
2030****************************************************************************/
2031
2032NTSTATUS open_directory(connection_struct *conn,
2033 const char *fname,
2034 SMB_STRUCT_STAT *psbuf,
2035 uint32 access_mask,
2036 uint32 share_access,
2037 uint32 create_disposition,
2038 uint32 create_options,
2039 uint32 file_attributes,
2040 int *pinfo,
2041 files_struct **result)
2042{
2043 files_struct *fsp = NULL;
2044 BOOL dir_existed = VALID_STAT(*psbuf) ? True : False;
2045 struct share_mode_lock *lck = NULL;
2046 NTSTATUS status;
2047 int info = 0;
2048
2049 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2050 "share_access = 0x%x create_options = 0x%x, "
2051 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2052 fname,
2053 (unsigned int)access_mask,
2054 (unsigned int)share_access,
2055 (unsigned int)create_options,
2056 (unsigned int)create_disposition,
2057 (unsigned int)file_attributes));
2058
2059 if (is_ntfs_stream_name(fname)) {
2060 DEBUG(0,("open_directory: %s is a stream name!\n", fname ));
2061 return NT_STATUS_NOT_A_DIRECTORY;
2062 }
2063
2064 switch( create_disposition ) {
2065 case FILE_OPEN:
2066
2067 info = FILE_WAS_OPENED;
2068
2069 /*
2070 * We want to follow symlinks here.
2071 */
2072
2073 if (SMB_VFS_STAT(conn, fname, psbuf) != 0) {
2074 return map_nt_error_from_unix(errno);
2075 }
2076
2077 break;
2078
2079 case FILE_CREATE:
2080
2081 /* If directory exists error. If directory doesn't
2082 * exist create. */
2083
2084 status = mkdir_internal(conn,
2085 fname,
2086 file_attributes,
2087 psbuf);
2088
2089 if (!NT_STATUS_IS_OK(status)) {
2090 DEBUG(2, ("open_directory: unable to create "
2091 "%s. Error was %s\n", fname,
2092 nt_errstr(status)));
2093 return status;
2094 }
2095
2096 info = FILE_WAS_CREATED;
2097 break;
2098
2099 case FILE_OPEN_IF:
2100 /*
2101 * If directory exists open. If directory doesn't
2102 * exist create.
2103 */
2104
2105 status = mkdir_internal(conn,
2106 fname,
2107 file_attributes,
2108 psbuf);
2109
2110 if (NT_STATUS_IS_OK(status)) {
2111 info = FILE_WAS_CREATED;
2112 }
2113
2114 if (NT_STATUS_EQUAL(status,
2115 NT_STATUS_OBJECT_NAME_COLLISION)) {
2116 info = FILE_WAS_OPENED;
2117 status = NT_STATUS_OK;
2118 }
2119
2120 break;
2121
2122 case FILE_SUPERSEDE:
2123 case FILE_OVERWRITE:
2124 case FILE_OVERWRITE_IF:
2125 default:
2126 DEBUG(5,("open_directory: invalid create_disposition "
2127 "0x%x for directory %s\n",
2128 (unsigned int)create_disposition, fname));
2129 return NT_STATUS_INVALID_PARAMETER;
2130 }
2131
2132 if(!S_ISDIR(psbuf->st_mode)) {
2133 DEBUG(5,("open_directory: %s is not a directory !\n",
2134 fname ));
2135 return NT_STATUS_NOT_A_DIRECTORY;
2136 }
2137
2138 status = file_new(conn, &fsp);
2139 if(!NT_STATUS_IS_OK(status)) {
2140 return status;
2141 }
2142
2143 /*
2144 * Setup the files_struct for it.
2145 */
2146
2147 fsp->mode = psbuf->st_mode;
2148 fsp->inode = psbuf->st_ino;
2149 fsp->dev = psbuf->st_dev;
2150 fsp->vuid = current_user.vuid;
2151 fsp->file_pid = global_smbpid;
2152 fsp->can_lock = False;
2153 fsp->can_read = False;
2154 fsp->can_write = False;
2155
2156 fsp->share_access = share_access;
2157 fsp->fh->private_options = create_options;
2158 fsp->access_mask = access_mask;
2159
2160 fsp->print_file = False;
2161 fsp->modified = False;
2162 fsp->oplock_type = NO_OPLOCK;
2163 fsp->sent_oplock_break = NO_BREAK_SENT;
2164 fsp->is_directory = True;
2165 fsp->is_stat = False;
2166 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2167
2168 string_set(&fsp->fsp_name,fname);
2169
2170 lck = get_share_mode_lock(NULL, fsp->dev, fsp->inode,
2171 conn->connectpath,
2172 fname);
2173
2174 if (lck == NULL) {
2175 DEBUG(0, ("open_directory: Could not get share mode lock for %s\n", fname));
2176 file_free(fsp);
2177 return NT_STATUS_SHARING_VIOLATION;
2178 }
2179
2180 status = open_mode_check(conn, fname, lck,
2181 access_mask, share_access,
2182 create_options, &dir_existed);
2183
2184 if (!NT_STATUS_IS_OK(status)) {
2185 TALLOC_FREE(lck);
2186 file_free(fsp);
2187 return status;
2188 }
2189
[39]2190 set_share_mode(lck, fsp, current_user.ut.uid, 0, NO_OPLOCK, True);
[22]2191
2192 /* For directories the delete on close bit at open time seems
2193 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2194 if (create_options & FILE_DELETE_ON_CLOSE) {
2195 status = can_set_delete_on_close(fsp, True, 0);
2196 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2197 TALLOC_FREE(lck);
2198 file_free(fsp);
2199 return status;
2200 }
2201
2202 if (NT_STATUS_IS_OK(status)) {
2203 /* Note that here we set the *inital* delete on close flag,
2204 not the regular one. The magic gets handled in close. */
2205 fsp->initial_delete_on_close = True;
2206 }
2207 }
2208
2209 TALLOC_FREE(lck);
2210
2211 if (pinfo) {
2212 *pinfo = info;
2213 }
2214
2215 conn->num_files_open++;
2216
2217 *result = fsp;
2218 return NT_STATUS_OK;
2219}
2220
2221NTSTATUS create_directory(connection_struct *conn, const char *directory)
2222{
2223 NTSTATUS status;
2224 SMB_STRUCT_STAT sbuf;
2225 files_struct *fsp;
2226
2227 SET_STAT_INVALID(sbuf);
2228
2229 status = open_directory(conn, directory, &sbuf,
2230 FILE_READ_ATTRIBUTES, /* Just a stat open */
2231 FILE_SHARE_NONE, /* Ignored for stat opens */
2232 FILE_CREATE,
2233 0,
2234 FILE_ATTRIBUTE_DIRECTORY,
2235 NULL,
2236 &fsp);
2237
2238 if (NT_STATUS_IS_OK(status)) {
2239 close_file(fsp, NORMAL_CLOSE);
2240 }
2241
2242 return status;
2243}
2244
2245/****************************************************************************
2246 Open a pseudo-file (no locking checks - a 'stat' open).
2247****************************************************************************/
2248
2249NTSTATUS open_file_stat(connection_struct *conn, const char *fname,
2250 SMB_STRUCT_STAT *psbuf, files_struct **result)
2251{
2252 files_struct *fsp = NULL;
2253 NTSTATUS status;
2254
2255 if (!VALID_STAT(*psbuf)) {
2256 return NT_STATUS_INVALID_PARAMETER;
2257 }
2258
2259 /* Can't 'stat' open directories. */
2260 if(S_ISDIR(psbuf->st_mode)) {
2261 return NT_STATUS_FILE_IS_A_DIRECTORY;
2262 }
2263
2264 status = file_new(conn, &fsp);
2265 if(!NT_STATUS_IS_OK(status)) {
2266 return status;
2267 }
2268
2269 DEBUG(5,("open_file_stat: 'opening' file %s\n", fname));
2270
2271 /*
2272 * Setup the files_struct for it.
2273 */
2274
2275 fsp->mode = psbuf->st_mode;
2276 fsp->inode = psbuf->st_ino;
2277 fsp->dev = psbuf->st_dev;
2278 fsp->vuid = current_user.vuid;
2279 fsp->file_pid = global_smbpid;
2280 fsp->can_lock = False;
2281 fsp->can_read = False;
2282 fsp->can_write = False;
2283 fsp->print_file = False;
2284 fsp->modified = False;
2285 fsp->oplock_type = NO_OPLOCK;
2286 fsp->sent_oplock_break = NO_BREAK_SENT;
2287 fsp->is_directory = False;
2288 fsp->is_stat = True;
2289 string_set(&fsp->fsp_name,fname);
2290
2291 conn->num_files_open++;
2292
2293 *result = fsp;
2294 return NT_STATUS_OK;
2295}
2296
2297/****************************************************************************
2298 Receive notification that one of our open files has been renamed by another
2299 smbd process.
2300****************************************************************************/
2301
2302void msg_file_was_renamed(int msg_type, struct process_id src,
2303 void *buf, size_t len, void *private_data)
2304{
2305 files_struct *fsp;
2306 char *frm = (char *)buf;
2307 SMB_DEV_T dev;
2308 SMB_INO_T inode;
2309 const char *sharepath;
2310 const char *newname;
2311 size_t sp_len;
2312
2313 if (buf == NULL || len < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2314 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n", (int)len));
2315 return;
2316 }
2317
2318 /* Unpack the message. */
2319 dev = DEV_T_VAL(frm,0);
2320 inode = INO_T_VAL(frm,8);
2321 sharepath = &frm[16];
2322 newname = sharepath + strlen(sharepath) + 1;
2323 sp_len = strlen(sharepath);
2324
2325 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2326 "dev %x, inode %.0f\n",
2327 sharepath, newname, (unsigned int)dev, (double)inode ));
2328
2329 for(fsp = file_find_di_first(dev, inode); fsp; fsp = file_find_di_next(fsp)) {
2330 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2331 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2332 fsp->fnum, fsp->fsp_name, newname ));
2333 string_set(&fsp->fsp_name, newname);
2334 } else {
2335 /* TODO. JRA. */
2336 /* Now we have the complete path we can work out if this is
2337 actually within this share and adjust newname accordingly. */
2338 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2339 "not sharepath %s) "
2340 "fnum %d from %s -> %s\n",
2341 fsp->conn->connectpath,
2342 sharepath,
2343 fsp->fnum,
2344 fsp->fsp_name,
2345 newname ));
2346 }
2347 }
2348}
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