?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
r20837: Use real type name, to fix compilation with -WC++-compat
[Samba.git] / source / smbd / open.c
blobbccc91bbd3e9b6d758cb2ecca04ad7a946486e9a
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
25 extern struct generic_mapping file_generic_mapping;
26 extern struct current_user current_user;
27 extern userdom_struct current_user_info;
28 extern uint16 global_smbpid;
29 extern BOOL global_client_failed_oplock_break;
30
31 struct 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
41 static BOOL fd_open(struct connection_struct *conn,
42 const char *fname,
43 files_struct *fsp,
44 int flags,
45 mode_t mode)
46 {
47 int sav;
48
49 #ifdef O_NOFOLLOW
50 if (!lp_symlinks(SNUM(conn))) {
51 flags |= O_NOFOLLOW;
52 }
53 #endif
54
55 fsp->fh->fd = SMB_VFS_OPEN(conn,fname,fsp,flags,mode);
56 sav = errno;
57
58 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
59 fname, flags, (int)mode, fsp->fh->fd,
60 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
61
62 errno = sav;
63 return fsp->fh->fd != -1;
64 }
65
66 /****************************************************************************
67 Close the file associated with a fsp.
68 ****************************************************************************/
69
70 int fd_close(struct connection_struct *conn,
71 files_struct *fsp)
72 {
73 if (fsp->fh->fd == -1) {
74 return 0; /* What we used to call a stat open. */
75 }
76 if (fsp->fh->ref_count > 1) {
77 return 0; /* Shared handle. Only close last reference. */
78 }
79 return fd_close_posix(conn, fsp);
80 }
81
82 /****************************************************************************
83 Change the ownership of a file to that of the parent directory.
84 Do this by fd if possible.
85 ****************************************************************************/
86
87 static void change_file_owner_to_parent(connection_struct *conn,
88 const char *inherit_from_dir,
89 files_struct *fsp)
90 {
91 SMB_STRUCT_STAT parent_st;
92 int ret;
93
94 ret = SMB_VFS_STAT(conn, inherit_from_dir, &parent_st);
95 if (ret == -1) {
96 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
97 "directory %s. Error was %s\n",
98 inherit_from_dir, strerror(errno) ));
99 return;
100 }
101
102 become_root();
103 ret = SMB_VFS_FCHOWN(fsp, fsp->fh->fd, parent_st.st_uid, (gid_t)-1);
104 unbecome_root();
105 if (ret == -1) {
106 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
107 "file %s to parent directory uid %u. Error "
108 "was %s\n", fsp->fsp_name,
109 (unsigned int)parent_st.st_uid,
110 strerror(errno) ));
111 }
112
113 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
114 "parent directory uid %u.\n", fsp->fsp_name,
115 (unsigned int)parent_st.st_uid ));
116 }
117
118 static void change_dir_owner_to_parent(connection_struct *conn,
119 const char *inherit_from_dir,
120 const char *fname,
121 SMB_STRUCT_STAT *psbuf)
122 {
123 pstring saved_dir;
124 SMB_STRUCT_STAT sbuf;
125 SMB_STRUCT_STAT parent_st;
126 int ret;
127
128 ret = SMB_VFS_STAT(conn, inherit_from_dir, &parent_st);
129 if (ret == -1) {
130 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
131 "directory %s. Error was %s\n",
132 inherit_from_dir, strerror(errno) ));
133 return;
134 }
135
136 /* We've already done an lstat into psbuf, and we know it's a
137 directory. If we can cd into the directory and the dev/ino
138 are the same then we can safely chown without races as
139 we're locking the directory in place by being in it. This
140 should work on any UNIX (thanks tridge :-). JRA.
141 */
142
143 if (!vfs_GetWd(conn,saved_dir)) {
144 DEBUG(0,("change_dir_owner_to_parent: failed to get "
145 "current working directory\n"));
146 return;
147 }
148
149 /* Chdir into the new path. */
150 if (vfs_ChDir(conn, fname) == -1) {
151 DEBUG(0,("change_dir_owner_to_parent: failed to change "
152 "current working directory to %s. Error "
153 "was %s\n", fname, strerror(errno) ));
154 goto out;
155 }
156
157 if (SMB_VFS_STAT(conn,".",&sbuf) == -1) {
158 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
159 "directory '.' (%s) Error was %s\n",
160 fname, strerror(errno)));
161 goto out;
162 }
163
164 /* Ensure we're pointing at the same place. */
165 if (sbuf.st_dev != psbuf->st_dev ||
166 sbuf.st_ino != psbuf->st_ino ||
167 sbuf.st_mode != psbuf->st_mode ) {
168 DEBUG(0,("change_dir_owner_to_parent: "
169 "device/inode/mode on directory %s changed. "
170 "Refusing to chown !\n", fname ));
171 goto out;
172 }
173
174 become_root();
175 ret = SMB_VFS_CHOWN(conn, ".", parent_st.st_uid, (gid_t)-1);
176 unbecome_root();
177 if (ret == -1) {
178 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
179 "directory %s to parent directory uid %u. "
180 "Error was %s\n", fname,
181 (unsigned int)parent_st.st_uid, strerror(errno) ));
182 goto out;
183 }
184
185 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
186 "directory %s to parent directory uid %u.\n",
187 fname, (unsigned int)parent_st.st_uid ));
188
189 out:
190
191 vfs_ChDir(conn,saved_dir);
192 }
193
194 /****************************************************************************
195 Open a file.
196 ****************************************************************************/
197
198 static NTSTATUS open_file(files_struct *fsp,
199 connection_struct *conn,
200 const char *parent_dir,
201 const char *name,
202 const char *path,
203 SMB_STRUCT_STAT *psbuf,
204 int flags,
205 mode_t unx_mode,
206 uint32 access_mask, /* client requested access mask. */
207 uint32 open_access_mask) /* what we're actually using in the open. */
208 {
209 int accmode = (flags & O_ACCMODE);
210 int local_flags = flags;
211 BOOL file_existed = VALID_STAT(*psbuf);
212
213 fsp->fh->fd = -1;
214 errno = EPERM;
215
216 /* Check permissions */
217
218 /*
219 * This code was changed after seeing a client open request
220 * containing the open mode of (DENY_WRITE/read-only) with
221 * the 'create if not exist' bit set. The previous code
222 * would fail to open the file read only on a read-only share
223 * as it was checking the flags parameter directly against O_RDONLY,
224 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
225 * JRA.
226 */
227
228 if (!CAN_WRITE(conn)) {
229 /* It's a read-only share - fail if we wanted to write. */
230 if(accmode != O_RDONLY) {
231 DEBUG(3,("Permission denied opening %s\n", path));
232 return NT_STATUS_ACCESS_DENIED;
233 } else if(flags & O_CREAT) {
234 /* We don't want to write - but we must make sure that
235 O_CREAT doesn't create the file if we have write
236 access into the directory.
237 */
238 flags &= ~O_CREAT;
239 local_flags &= ~O_CREAT;
240 }
241 }
242
243 /*
244 * This little piece of insanity is inspired by the
245 * fact that an NT client can open a file for O_RDONLY,
246 * but set the create disposition to FILE_EXISTS_TRUNCATE.
247 * If the client *can* write to the file, then it expects to
248 * truncate the file, even though it is opening for readonly.
249 * Quicken uses this stupid trick in backup file creation...
250 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
251 * for helping track this one down. It didn't bite us in 2.0.x
252 * as we always opened files read-write in that release. JRA.
253 */
254
255 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
256 DEBUG(10,("open_file: truncate requested on read-only open "
257 "for file %s\n", path));
258 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
259 }
260
261 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
262 (!file_existed && (local_flags & O_CREAT)) ||
263 ((local_flags & O_TRUNC) == O_TRUNC) ) {
264
265 /*
266 * We can't actually truncate here as the file may be locked.
267 * open_file_ntcreate will take care of the truncate later. JRA.
268 */
269
270 local_flags &= ~O_TRUNC;
271
272 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
273 /*
274 * We would block on opening a FIFO with no one else on the
275 * other end. Do what we used to do and add O_NONBLOCK to the
276 * open flags. JRA.
277 */
278
279 if (file_existed && S_ISFIFO(psbuf->st_mode)) {
280 local_flags |= O_NONBLOCK;
281 }
282 #endif
283
284 /* Don't create files with Microsoft wildcard characters. */
285 if ((local_flags & O_CREAT) && !file_existed &&
286 ms_has_wild(path)) {
287 return NT_STATUS_OBJECT_NAME_INVALID;
288 }
289
290 /* Actually do the open */
291 if (!fd_open(conn, path, fsp, local_flags, unx_mode)) {
292 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
293 "(flags=%d)\n",
294 path,strerror(errno),local_flags,flags));
295 return map_nt_error_from_unix(errno);
296 }
297
298 if ((local_flags & O_CREAT) && !file_existed) {
299
300 /* Inherit the ACL if required */
301 if (lp_inherit_perms(SNUM(conn))) {
302 inherit_access_acl(conn, parent_dir, path,
303 unx_mode);
304 }
305
306 /* Change the owner if required. */
307 if (lp_inherit_owner(SNUM(conn))) {
308 change_file_owner_to_parent(conn, parent_dir,
309 fsp);
310 }
311
312 }
313
314 } else {
315 fsp->fh->fd = -1; /* What we used to call a stat open. */
316 }
317
318 if (!file_existed) {
319 int ret;
320
321 if (fsp->fh->fd == -1) {
322 ret = SMB_VFS_STAT(conn, path, psbuf);
323 } else {
324 ret = SMB_VFS_FSTAT(fsp,fsp->fh->fd,psbuf);
325 /* If we have an fd, this stat should succeed. */
326 if (ret == -1) {
327 DEBUG(0,("Error doing fstat on open file %s "
328 "(%s)\n", path,strerror(errno) ));
329 }
330 }
331
332 /* For a non-io open, this stat failing means file not found. JRA */
333 if (ret == -1) {
334 NTSTATUS status = map_nt_error_from_unix(errno);
335 fd_close(conn, fsp);
336 return status;
337 }
338 }
339
340 /*
341 * POSIX allows read-only opens of directories. We don't
342 * want to do this (we use a different code path for this)
343 * so catch a directory open and return an EISDIR. JRA.
344 */
345
346 if(S_ISDIR(psbuf->st_mode)) {
347 fd_close(conn, fsp);
348 errno = EISDIR;
349 return NT_STATUS_FILE_IS_A_DIRECTORY;
350 }
351
352 fsp->mode = psbuf->st_mode;
353 fsp->inode = psbuf->st_ino;
354 fsp->dev = psbuf->st_dev;
355 fsp->vuid = current_user.vuid;
356 fsp->file_pid = global_smbpid;
357 fsp->can_lock = True;
358 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
359 if (!CAN_WRITE(conn)) {
360 fsp->can_write = False;
361 } else {
362 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
363 True : False;
364 }
365 fsp->print_file = False;
366 fsp->modified = False;
367 fsp->sent_oplock_break = NO_BREAK_SENT;
368 fsp->is_directory = False;
369 fsp->is_stat = False;
370 if (conn->aio_write_behind_list
371 && is_in_path(path, conn->aio_write_behind_list,
372 conn->case_sensitive)) {
373 fsp->aio_write_behind = True;
374 }
375
376 string_set(&fsp->fsp_name, path);
377 fsp->wcp = NULL; /* Write cache pointer. */
378
379 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
380 *current_user_info.smb_name ?
381 current_user_info.smb_name : conn->user,fsp->fsp_name,
382 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
383 conn->num_files_open + 1));
384
385 errno = 0;
386 return NT_STATUS_OK;
387 }
388
389 /*******************************************************************
390 Return True if the filename is one of the special executable types.
391 ********************************************************************/
392
393 static BOOL is_executable(const char *fname)
394 {
395 if ((fname = strrchr_m(fname,'.'))) {
396 if (strequal(fname,".com") ||
397 strequal(fname,".dll") ||
398 strequal(fname,".exe") ||
399 strequal(fname,".sym")) {
400 return True;
401 }
402 }
403 return False;
404 }
405
406 /****************************************************************************
407 Check if we can open a file with a share mode.
408 Returns True if conflict, False if not.
409 ****************************************************************************/
410
411 static BOOL share_conflict(struct share_mode_entry *entry,
412 uint32 access_mask,
413 uint32 share_access)
414 {
415 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
416 "entry->share_access = 0x%x, "
417 "entry->private_options = 0x%x\n",
418 (unsigned int)entry->access_mask,
419 (unsigned int)entry->share_access,
420 (unsigned int)entry->private_options));
421
422 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
423 (unsigned int)access_mask, (unsigned int)share_access));
424
425 if ((entry->access_mask & (FILE_WRITE_DATA|
426 FILE_APPEND_DATA|
427 FILE_READ_DATA|
428 FILE_EXECUTE|
429 DELETE_ACCESS)) == 0) {
430 DEBUG(10,("share_conflict: No conflict due to "
431 "entry->access_mask = 0x%x\n",
432 (unsigned int)entry->access_mask ));
433 return False;
434 }
435
436 if ((access_mask & (FILE_WRITE_DATA|
437 FILE_APPEND_DATA|
438 FILE_READ_DATA|
439 FILE_EXECUTE|
440 DELETE_ACCESS)) == 0) {
441 DEBUG(10,("share_conflict: No conflict due to "
442 "access_mask = 0x%x\n",
443 (unsigned int)access_mask ));
444 return False;
445 }
446
447 #if 1 /* JRA TEST - Superdebug. */
448 #define CHECK_MASK(num, am, right, sa, share) \
449 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
450 (unsigned int)(num), (unsigned int)(am), \
451 (unsigned int)(right), (unsigned int)(am)&(right) )); \
452 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
453 (unsigned int)(num), (unsigned int)(sa), \
454 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
455 if (((am) & (right)) && !((sa) & (share))) { \
456 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
457 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
458 (unsigned int)(share) )); \
459 return True; \
460 }
461 #else
462 #define CHECK_MASK(num, am, right, sa, share) \
463 if (((am) & (right)) && !((sa) & (share))) { \
464 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
465 sa = 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 #endif
470
471 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
472 share_access, FILE_SHARE_WRITE);
473 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
474 entry->share_access, FILE_SHARE_WRITE);
475
476 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
477 share_access, FILE_SHARE_READ);
478 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
479 entry->share_access, FILE_SHARE_READ);
480
481 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
482 share_access, FILE_SHARE_DELETE);
483 CHECK_MASK(6, access_mask, DELETE_ACCESS,
484 entry->share_access, FILE_SHARE_DELETE);
485
486 DEBUG(10,("share_conflict: No conflict.\n"));
487 return False;
488 }
489
490 #if defined(DEVELOPER)
491 static void validate_my_share_entries(int num,
492 struct share_mode_entry *share_entry)
493 {
494 files_struct *fsp;
495
496 if (!procid_is_me(&share_entry->pid)) {
497 return;
498 }
499
500 if (is_deferred_open_entry(share_entry) &&
501 !open_was_deferred(share_entry->op_mid)) {
502 pstring str;
503 pstr_sprintf(str, "Got a deferred entry without a request: "
504 "PANIC: %s\n", share_mode_str(num, share_entry));
505 smb_panic(str);
506 }
507
508 if (!is_valid_share_mode_entry(share_entry)) {
509 return;
510 }
511
512 fsp = file_find_dif(share_entry->dev, share_entry->inode,
513 share_entry->share_file_id);
514 if (!fsp) {
515 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
516 share_mode_str(num, share_entry) ));
517 smb_panic("validate_my_share_entries: Cannot match a "
518 "share entry with an open file\n");
519 }
520
521 if (is_deferred_open_entry(share_entry) ||
522 is_unused_share_mode_entry(share_entry)) {
523 goto panic;
524 }
525
526 if ((share_entry->op_type == NO_OPLOCK) &&
527 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
528 /* Someone has already written to it, but I haven't yet
529 * noticed */
530 return;
531 }
532
533 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
534 goto panic;
535 }
536
537 return;
538
539 panic:
540 {
541 pstring str;
542 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
543 share_mode_str(num, share_entry) ));
544 slprintf(str, sizeof(str)-1, "validate_my_share_entries: "
545 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
546 fsp->fsp_name, (unsigned int)fsp->oplock_type,
547 (unsigned int)share_entry->op_type );
548 smb_panic(str);
549 }
550 }
551 #endif
552
553 static BOOL is_stat_open(uint32 access_mask)
554 {
555 return (access_mask &&
556 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
557 FILE_WRITE_ATTRIBUTES))==0) &&
558 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
559 FILE_WRITE_ATTRIBUTES)) != 0));
560 }
561
562 /****************************************************************************
563 Deal with share modes
564 Invarient: Share mode must be locked on entry and exit.
565 Returns -1 on error, or number of share modes on success (may be zero).
566 ****************************************************************************/
567
568 static NTSTATUS open_mode_check(connection_struct *conn,
569 const char *fname,
570 struct share_mode_lock *lck,
571 uint32 access_mask,
572 uint32 share_access,
573 uint32 create_options,
574 BOOL *file_existed)
575 {
576 int i;
577
578 if(lck->num_share_modes == 0) {
579 return NT_STATUS_OK;
580 }
581
582 *file_existed = True;
583
584 if (is_stat_open(access_mask)) {
585 /* Stat open that doesn't trigger oplock breaks or share mode
586 * checks... ! JRA. */
587 return NT_STATUS_OK;
588 }
589
590 /* A delete on close prohibits everything */
591
592 if (lck->delete_on_close) {
593 return NT_STATUS_DELETE_PENDING;
594 }
595
596 /*
597 * Check if the share modes will give us access.
598 */
599
600 #if defined(DEVELOPER)
601 for(i = 0; i < lck->num_share_modes; i++) {
602 validate_my_share_entries(i, &lck->share_modes[i]);
603 }
604 #endif
605
606 if (!lp_share_modes(SNUM(conn))) {
607 return NT_STATUS_OK;
608 }
609
610 /* Now we check the share modes, after any oplock breaks. */
611 for(i = 0; i < lck->num_share_modes; i++) {
612
613 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
614 continue;
615 }
616
617 /* someone else has a share lock on it, check to see if we can
618 * too */
619 if (share_conflict(&lck->share_modes[i],
620 access_mask, share_access)) {
621 return NT_STATUS_SHARING_VIOLATION;
622 }
623 }
624
625 return NT_STATUS_OK;
626 }
627
628 static BOOL is_delete_request(files_struct *fsp) {
629 return ((fsp->access_mask == DELETE_ACCESS) &&
630 (fsp->oplock_type == NO_OPLOCK));
631 }
632
633 /*
634 * 1) No files open at all or internal open: Grant whatever the client wants.
635 *
636 * 2) Exclusive (or batch) oplock around: If the requested access is a delete
637 * request, break if the oplock around is a batch oplock. If it's another
638 * requested access type, break.
639 *
640 * 3) Only level2 around: Grant level2 and do nothing else.
641 */
642
643 static BOOL delay_for_oplocks(struct share_mode_lock *lck,
644 files_struct *fsp,
645 int pass_number,
646 int oplock_request)
647 {
648 int i;
649 struct share_mode_entry *exclusive = NULL;
650 BOOL valid_entry = False;
651 BOOL delay_it = False;
652 BOOL have_level2 = False;
653 BOOL ret;
654 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
655
656 if (oplock_request & INTERNAL_OPEN_ONLY) {
657 fsp->oplock_type = NO_OPLOCK;
658 }
659
660 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
661 return False;
662 }
663
664 for (i=0; i<lck->num_share_modes; i++) {
665
666 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
667 continue;
668 }
669
670 /* At least one entry is not an invalid or deferred entry. */
671 valid_entry = True;
672
673 if (pass_number == 1) {
674 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
675 SMB_ASSERT(exclusive == NULL);
676 exclusive = &lck->share_modes[i];
677 }
678 } else {
679 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
680 SMB_ASSERT(exclusive == NULL);
681 exclusive = &lck->share_modes[i];
682 }
683 }
684
685 if (lck->share_modes[i].op_type == LEVEL_II_OPLOCK) {
686 SMB_ASSERT(exclusive == NULL);
687 have_level2 = True;
688 }
689 }
690
691 if (!valid_entry) {
692 /* All entries are placeholders or deferred.
693 * Directly grant whatever the client wants. */
694 if (fsp->oplock_type == NO_OPLOCK) {
695 /* Store a level2 oplock, but don't tell the client */
696 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
697 }
698 return False;
699 }
700
701 if (exclusive != NULL) { /* Found an exclusive oplock */
702 SMB_ASSERT(!have_level2);
703 delay_it = is_delete_request(fsp) ?
704 BATCH_OPLOCK_TYPE(exclusive->op_type) : True;
705 }
706
707 if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
708 /* We can at most grant level2 as there are other
709 * level2 or NO_OPLOCK entries. */
710 fsp->oplock_type = LEVEL_II_OPLOCK;
711 }
712
713 if ((fsp->oplock_type == NO_OPLOCK) && have_level2) {
714 /* Store a level2 oplock, but don't tell the client */
715 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
716 }
717
718 if (!delay_it) {
719 return False;
720 }
721
722 /*
723 * Send a break message to the oplock holder and delay the open for
724 * our client.
725 */
726
727 DEBUG(10, ("Sending break request to PID %s\n",
728 procid_str_static(&exclusive->pid)));
729 exclusive->op_mid = get_current_mid();
730
731 /* Create the message. */
732 share_mode_entry_to_message(msg, exclusive);
733
734 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
735 don't want this set in the share mode struct pointed to by lck. */
736
737 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
738 SSVAL(msg,6,exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
739 }
740
741 ret = message_send_pid(exclusive->pid, MSG_SMB_BREAK_REQUEST,
742 msg, MSG_SMB_SHARE_MODE_ENTRY_SIZE, True);
743 if (!ret) {
744 DEBUG(3, ("Could not send oplock break message\n"));
745 }
746
747 return True;
748 }
749
750 static BOOL request_timed_out(struct timeval request_time,
751 struct timeval timeout)
752 {
753 struct timeval now, end_time;
754 GetTimeOfDay(&now);
755 end_time = timeval_sum(&request_time, &timeout);
756 return (timeval_compare(&end_time, &now) < 0);
757 }
758
759 /****************************************************************************
760 Handle the 1 second delay in returning a SHARING_VIOLATION error.
761 ****************************************************************************/
762
763 static void defer_open(struct share_mode_lock *lck,
764 struct timeval request_time,
765 struct timeval timeout,
766 struct deferred_open_record *state)
767 {
768 uint16 mid = get_current_mid();
769 int i;
770
771 /* Paranoia check */
772
773 for (i=0; i<lck->num_share_modes; i++) {
774 struct share_mode_entry *e = &lck->share_modes[i];
775
776 if (!is_deferred_open_entry(e)) {
777 continue;
778 }
779
780 if (procid_is_me(&e->pid) && (e->op_mid == mid)) {
781 DEBUG(0, ("Trying to defer an already deferred "
782 "request: mid=%d, exiting\n", mid));
783 exit_server("attempt to defer a deferred request");
784 }
785 }
786
787 /* End paranoia check */
788
789 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
790 "open entry for mid %u\n",
791 (unsigned int)request_time.tv_sec,
792 (unsigned int)request_time.tv_usec,
793 (unsigned int)mid));
794
795 if (!push_deferred_smb_message(mid, request_time, timeout,
796 (char *)state, sizeof(*state))) {
797 exit_server("push_deferred_smb_message failed");
798 }
799 add_deferred_open(lck, mid, request_time, state->dev, state->inode);
800
801 /*
802 * Push the MID of this packet on the signing queue.
803 * We only do this once, the first time we push the packet
804 * onto the deferred open queue, as this has a side effect
805 * of incrementing the response sequence number.
806 */
807
808 srv_defer_sign_response(mid);
809 }
810
811
812 /****************************************************************************
813 On overwrite open ensure that the attributes match.
814 ****************************************************************************/
815
816 static BOOL open_match_attributes(connection_struct *conn,
817 const char *path,
818 uint32 old_dos_attr,
819 uint32 new_dos_attr,
820 mode_t existing_unx_mode,
821 mode_t new_unx_mode,
822 mode_t *returned_unx_mode)
823 {
824 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
825
826 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
827 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
828
829 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
830 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
831 *returned_unx_mode = new_unx_mode;
832 } else {
833 *returned_unx_mode = (mode_t)0;
834 }
835
836 DEBUG(10,("open_match_attributes: file %s old_dos_attr = 0x%x, "
837 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
838 "returned_unx_mode = 0%o\n",
839 path,
840 (unsigned int)old_dos_attr,
841 (unsigned int)existing_unx_mode,
842 (unsigned int)new_dos_attr,
843 (unsigned int)*returned_unx_mode ));
844
845 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
846 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
847 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
848 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
849 return False;
850 }
851 }
852 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
853 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
854 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
855 return False;
856 }
857 }
858 return True;
859 }
860
861 /****************************************************************************
862 Special FCB or DOS processing in the case of a sharing violation.
863 Try and find a duplicated file handle.
864 ****************************************************************************/
865
866 static files_struct *fcb_or_dos_open(connection_struct *conn,
867 const char *fname, SMB_DEV_T dev,
868 SMB_INO_T inode,
869 uint32 access_mask,
870 uint32 share_access,
871 uint32 create_options)
872 {
873 files_struct *fsp;
874 files_struct *dup_fsp;
875
876 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
877 "file %s.\n", fname ));
878
879 for(fsp = file_find_di_first(dev, inode); fsp;
880 fsp = file_find_di_next(fsp)) {
881
882 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
883 "vuid = %u, file_pid = %u, private_options = 0x%x "
884 "access_mask = 0x%x\n", fsp->fsp_name,
885 fsp->fh->fd, (unsigned int)fsp->vuid,
886 (unsigned int)fsp->file_pid,
887 (unsigned int)fsp->fh->private_options,
888 (unsigned int)fsp->access_mask ));
889
890 if (fsp->fh->fd != -1 &&
891 fsp->vuid == current_user.vuid &&
892 fsp->file_pid == global_smbpid &&
893 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
894 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
895 (fsp->access_mask & FILE_WRITE_DATA) &&
896 strequal(fsp->fsp_name, fname)) {
897 DEBUG(10,("fcb_or_dos_open: file match\n"));
898 break;
899 }
900 }
901
902 if (!fsp) {
903 return NULL;
904 }
905
906 /* quite an insane set of semantics ... */
907 if (is_executable(fname) &&
908 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
909 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
910 return NULL;
911 }
912
913 /* We need to duplicate this fsp. */
914 if (!NT_STATUS_IS_OK(dup_file_fsp(fsp, access_mask, share_access,
915 create_options, &dup_fsp))) {
916 return NULL;
917 }
918
919 return dup_fsp;
920 }
921
922 /****************************************************************************
923 Open a file with a share mode - old openX method - map into NTCreate.
924 ****************************************************************************/
925
926 BOOL map_open_params_to_ntcreate(const char *fname, int deny_mode, int open_func,
927 uint32 *paccess_mask,
928 uint32 *pshare_mode,
929 uint32 *pcreate_disposition,
930 uint32 *pcreate_options)
931 {
932 uint32 access_mask;
933 uint32 share_mode;
934 uint32 create_disposition;
935 uint32 create_options = 0;
936
937 DEBUG(10,("map_open_params_to_ntcreate: fname = %s, deny_mode = 0x%x, "
938 "open_func = 0x%x\n",
939 fname, (unsigned int)deny_mode, (unsigned int)open_func ));
940
941 /* Create the NT compatible access_mask. */
942 switch (GET_OPENX_MODE(deny_mode)) {
943 case DOS_OPEN_EXEC: /* Implies read-only - used to be FILE_READ_DATA */
944 case DOS_OPEN_RDONLY:
945 access_mask = FILE_GENERIC_READ;
946 break;
947 case DOS_OPEN_WRONLY:
948 access_mask = FILE_GENERIC_WRITE;
949 break;
950 case DOS_OPEN_RDWR:
951 case DOS_OPEN_FCB:
952 access_mask = FILE_GENERIC_READ|FILE_GENERIC_WRITE;
953 break;
954 default:
955 DEBUG(10,("map_open_params_to_ntcreate: bad open mode = 0x%x\n",
956 (unsigned int)GET_OPENX_MODE(deny_mode)));
957 return False;
958 }
959
960 /* Create the NT compatible create_disposition. */
961 switch (open_func) {
962 case OPENX_FILE_EXISTS_FAIL|OPENX_FILE_CREATE_IF_NOT_EXIST:
963 create_disposition = FILE_CREATE;
964 break;
965
966 case OPENX_FILE_EXISTS_OPEN:
967 create_disposition = FILE_OPEN;
968 break;
969
970 case OPENX_FILE_EXISTS_OPEN|OPENX_FILE_CREATE_IF_NOT_EXIST:
971 create_disposition = FILE_OPEN_IF;
972 break;
973
974 case OPENX_FILE_EXISTS_TRUNCATE:
975 create_disposition = FILE_OVERWRITE;
976 break;
977
978 case OPENX_FILE_EXISTS_TRUNCATE|OPENX_FILE_CREATE_IF_NOT_EXIST:
979 create_disposition = FILE_OVERWRITE_IF;
980 break;
981
982 default:
983 /* From samba4 - to be confirmed. */
984 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_EXEC) {
985 create_disposition = FILE_CREATE;
986 break;
987 }
988 DEBUG(10,("map_open_params_to_ntcreate: bad "
989 "open_func 0x%x\n", (unsigned int)open_func));
990 return False;
991 }
992
993 /* Create the NT compatible share modes. */
994 switch (GET_DENY_MODE(deny_mode)) {
995 case DENY_ALL:
996 share_mode = FILE_SHARE_NONE;
997 break;
998
999 case DENY_WRITE:
1000 share_mode = FILE_SHARE_READ;
1001 break;
1002
1003 case DENY_READ:
1004 share_mode = FILE_SHARE_WRITE;
1005 break;
1006
1007 case DENY_NONE:
1008 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1009 break;
1010
1011 case DENY_DOS:
1012 create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_DOS;
1013 if (is_executable(fname)) {
1014 share_mode = FILE_SHARE_READ|FILE_SHARE_WRITE;
1015 } else {
1016 if (GET_OPENX_MODE(deny_mode) == DOS_OPEN_RDONLY) {
1017 share_mode = FILE_SHARE_READ;
1018 } else {
1019 share_mode = FILE_SHARE_NONE;
1020 }
1021 }
1022 break;
1023
1024 case DENY_FCB:
1025 create_options |= NTCREATEX_OPTIONS_PRIVATE_DENY_FCB;
1026 share_mode = FILE_SHARE_NONE;
1027 break;
1028
1029 default:
1030 DEBUG(10,("map_open_params_to_ntcreate: bad deny_mode 0x%x\n",
1031 (unsigned int)GET_DENY_MODE(deny_mode) ));
1032 return False;
1033 }
1034
1035 DEBUG(10,("map_open_params_to_ntcreate: file %s, access_mask = 0x%x, "
1036 "share_mode = 0x%x, create_disposition = 0x%x, "
1037 "create_options = 0x%x\n",
1038 fname,
1039 (unsigned int)access_mask,
1040 (unsigned int)share_mode,
1041 (unsigned int)create_disposition,
1042 (unsigned int)create_options ));
1043
1044 if (paccess_mask) {
1045 *paccess_mask = access_mask;
1046 }
1047 if (pshare_mode) {
1048 *pshare_mode = share_mode;
1049 }
1050 if (pcreate_disposition) {
1051 *pcreate_disposition = create_disposition;
1052 }
1053 if (pcreate_options) {
1054 *pcreate_options = create_options;
1055 }
1056
1057 return True;
1058
1059 }
1060
1061 static void schedule_defer_open(struct share_mode_lock *lck, struct timeval request_time)
1062 {
1063 struct deferred_open_record state;
1064
1065 /* This is a relative time, added to the absolute
1066 request_time value to get the absolute timeout time.
1067 Note that if this is the second or greater time we enter
1068 this codepath for this particular request mid then
1069 request_time is left as the absolute time of the *first*
1070 time this request mid was processed. This is what allows
1071 the request to eventually time out. */
1072
1073 struct timeval timeout;
1074
1075 /* Normally the smbd we asked should respond within
1076 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1077 * the client did, give twice the timeout as a safety
1078 * measure here in case the other smbd is stuck
1079 * somewhere else. */
1080
1081 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1082
1083 /* Nothing actually uses state.delayed_for_oplocks
1084 but it's handy to differentiate in debug messages
1085 between a 30 second delay due to oplock break, and
1086 a 1 second delay for share mode conflicts. */
1087
1088 state.delayed_for_oplocks = True;
1089 state.dev = lck->dev;
1090 state.inode = lck->ino;
1091
1092 if (!request_timed_out(request_time, timeout)) {
1093 defer_open(lck, request_time, timeout, &state);
1094 }
1095 }
1096
1097 /****************************************************************************
1098 Open a file with a share mode.
1099 ****************************************************************************/
1100
1101 NTSTATUS open_file_ntcreate(connection_struct *conn,
1102 const char *fname,
1103 SMB_STRUCT_STAT *psbuf,
1104 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1105 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1106 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1107 uint32 create_options, /* options such as delete on close. */
1108 uint32 new_dos_attributes, /* attributes used for new file. */
1109 int oplock_request, /* internal Samba oplock codes. */
1110 /* Information (FILE_EXISTS etc.) */
1111 int *pinfo,
1112 files_struct **result)
1113 {
1114 int flags=0;
1115 int flags2=0;
1116 BOOL file_existed = VALID_STAT(*psbuf);
1117 BOOL def_acl = False;
1118 SMB_DEV_T dev = 0;
1119 SMB_INO_T inode = 0;
1120 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1121 files_struct *fsp = NULL;
1122 mode_t new_unx_mode = (mode_t)0;
1123 mode_t unx_mode = (mode_t)0;
1124 int info;
1125 uint32 existing_dos_attributes = 0;
1126 struct pending_message_list *pml = NULL;
1127 uint16 mid = get_current_mid();
1128 struct timeval request_time = timeval_zero();
1129 struct share_mode_lock *lck = NULL;
1130 uint32 open_access_mask = access_mask;
1131 NTSTATUS status;
1132 int ret_flock;
1133 char *parent_dir;
1134 const char *newname;
1135
1136 if (conn->printer) {
1137 /*
1138 * Printers are handled completely differently.
1139 * Most of the passed parameters are ignored.
1140 */
1141
1142 if (pinfo) {
1143 *pinfo = FILE_WAS_CREATED;
1144 }
1145
1146 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n", fname));
1147
1148 return print_fsp_open(conn, fname, result);
1149 }
1150
1151 if (!parent_dirname_talloc(tmp_talloc_ctx(), fname, &parent_dir,
1152 &newname)) {
1153 return NT_STATUS_NO_MEMORY;
1154 }
1155
1156 /* We add aARCH to this as this mode is only used if the file is
1157 * created new. */
1158 unx_mode = unix_mode(conn, new_dos_attributes | aARCH, fname,
1159 parent_dir);
1160
1161 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1162 "access_mask=0x%x share_access=0x%x "
1163 "create_disposition = 0x%x create_options=0x%x "
1164 "unix mode=0%o oplock_request=%d\n",
1165 fname, new_dos_attributes, access_mask, share_access,
1166 create_disposition, create_options, unx_mode,
1167 oplock_request));
1168
1169 if ((pml = get_open_deferred_message(mid)) != NULL) {
1170 struct deferred_open_record *state =
1171 (struct deferred_open_record *)pml->private_data.data;
1172
1173 /* Remember the absolute time of the original
1174 request with this mid. We'll use it later to
1175 see if this has timed out. */
1176
1177 request_time = pml->request_time;
1178
1179 /* Remove the deferred open entry under lock. */
1180 lck = get_share_mode_lock(NULL, state->dev, state->inode, NULL, NULL);
1181 if (lck == NULL) {
1182 DEBUG(0, ("could not get share mode lock\n"));
1183 } else {
1184 del_deferred_open_entry(lck, mid);
1185 TALLOC_FREE(lck);
1186 }
1187
1188 /* Ensure we don't reprocess this message. */
1189 remove_deferred_open_smb_message(mid);
1190 }
1191
1192 if (!check_name(fname,conn)) {
1193 return map_nt_error_from_unix(errno);
1194 }
1195
1196 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1197 if (file_existed) {
1198 existing_dos_attributes = dos_mode(conn, fname, psbuf);
1199 }
1200
1201 /* ignore any oplock requests if oplocks are disabled */
1202 if (!lp_oplocks(SNUM(conn)) || global_client_failed_oplock_break ||
1203 IS_VETO_OPLOCK_PATH(conn, fname)) {
1204 /* Mask off everything except the private Samba bits. */
1205 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1206 }
1207
1208 /* this is for OS/2 long file names - say we don't support them */
1209 if (!lp_posix_pathnames() && strstr(fname,".+,;=[].")) {
1210 /* OS/2 Workplace shell fix may be main code stream in a later
1211 * release. */
1212 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1213 "supported.\n"));
1214 if (use_nt_status()) {
1215 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1216 }
1217 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1218 }
1219
1220 switch( create_disposition ) {
1221 /*
1222 * Currently we're using FILE_SUPERSEDE as the same as
1223 * FILE_OVERWRITE_IF but they really are
1224 * different. FILE_SUPERSEDE deletes an existing file
1225 * (requiring delete access) then recreates it.
1226 */
1227 case FILE_SUPERSEDE:
1228 /* If file exists replace/overwrite. If file doesn't
1229 * exist create. */
1230 flags2 |= (O_CREAT | O_TRUNC);
1231 break;
1232
1233 case FILE_OVERWRITE_IF:
1234 /* If file exists replace/overwrite. If file doesn't
1235 * exist create. */
1236 flags2 |= (O_CREAT | O_TRUNC);
1237 break;
1238
1239 case FILE_OPEN:
1240 /* If file exists open. If file doesn't exist error. */
1241 if (!file_existed) {
1242 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1243 "requested for file %s and file "
1244 "doesn't exist.\n", fname ));
1245 errno = ENOENT;
1246 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1247 }
1248 break;
1249
1250 case FILE_OVERWRITE:
1251 /* If file exists overwrite. If file doesn't exist
1252 * error. */
1253 if (!file_existed) {
1254 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1255 "requested for file %s and file "
1256 "doesn't exist.\n", fname ));
1257 errno = ENOENT;
1258 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1259 }
1260 flags2 |= O_TRUNC;
1261 break;
1262
1263 case FILE_CREATE:
1264 /* If file exists error. If file doesn't exist
1265 * create. */
1266 if (file_existed) {
1267 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1268 "requested for file %s and file "
1269 "already exists.\n", fname ));
1270 if (S_ISDIR(psbuf->st_mode)) {
1271 errno = EISDIR;
1272 } else {
1273 errno = EEXIST;
1274 }
1275 return map_nt_error_from_unix(errno);
1276 }
1277 flags2 |= (O_CREAT|O_EXCL);
1278 break;
1279
1280 case FILE_OPEN_IF:
1281 /* If file exists open. If file doesn't exist
1282 * create. */
1283 flags2 |= O_CREAT;
1284 break;
1285
1286 default:
1287 return NT_STATUS_INVALID_PARAMETER;
1288 }
1289
1290 /* We only care about matching attributes on file exists and
1291 * overwrite. */
1292
1293 if (file_existed && ((create_disposition == FILE_OVERWRITE) ||
1294 (create_disposition == FILE_OVERWRITE_IF))) {
1295 if (!open_match_attributes(conn, fname,
1296 existing_dos_attributes,
1297 new_dos_attributes, psbuf->st_mode,
1298 unx_mode, &new_unx_mode)) {
1299 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1300 "for file %s (%x %x) (0%o, 0%o)\n",
1301 fname, existing_dos_attributes,
1302 new_dos_attributes,
1303 (unsigned int)psbuf->st_mode,
1304 (unsigned int)unx_mode ));
1305 errno = EACCES;
1306 return NT_STATUS_ACCESS_DENIED;
1307 }
1308 }
1309
1310 /* This is a nasty hack - must fix... JRA. */
1311 if (access_mask == MAXIMUM_ALLOWED_ACCESS) {
1312 open_access_mask = access_mask = FILE_GENERIC_ALL;
1313 }
1314
1315 /*
1316 * Convert GENERIC bits to specific bits.
1317 */
1318
1319 se_map_generic(&access_mask, &file_generic_mapping);
1320 open_access_mask = access_mask;
1321
1322 if (flags2 & O_TRUNC) {
1323 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1324 }
1325
1326 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1327 "access_mask=0x%x\n", fname, access_mask ));
1328
1329 /*
1330 * Note that we ignore the append flag as append does not
1331 * mean the same thing under DOS and Unix.
1332 */
1333
1334 if (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) {
1335 /* DENY_DOS opens are always underlying read-write on the
1336 file handle, no matter what the requested access mask
1337 says. */
1338 if ((create_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1339 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1340 flags = O_RDWR;
1341 } else {
1342 flags = O_WRONLY;
1343 }
1344 } else {
1345 flags = O_RDONLY;
1346 }
1347
1348 /*
1349 * Currently we only look at FILE_WRITE_THROUGH for create options.
1350 */
1351
1352 #if defined(O_SYNC)
1353 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1354 flags2 |= O_SYNC;
1355 }
1356 #endif /* O_SYNC */
1357
1358 if (!CAN_WRITE(conn)) {
1359 /*
1360 * We should really return a permission denied error if either
1361 * O_CREAT or O_TRUNC are set, but for compatibility with
1362 * older versions of Samba we just AND them out.
1363 */
1364 flags2 &= ~(O_CREAT|O_TRUNC);
1365 }
1366
1367 /*
1368 * Ensure we can't write on a read-only share or file.
1369 */
1370
1371 if (flags != O_RDONLY && file_existed &&
1372 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1373 DEBUG(5,("open_file_ntcreate: write access requested for "
1374 "file %s on read only %s\n",
1375 fname, !CAN_WRITE(conn) ? "share" : "file" ));
1376 errno = EACCES;
1377 return NT_STATUS_ACCESS_DENIED;
1378 }
1379
1380 status = file_new(conn, &fsp);
1381 if(!NT_STATUS_IS_OK(status)) {
1382 return status;
1383 }
1384
1385 fsp->dev = psbuf->st_dev;
1386 fsp->inode = psbuf->st_ino;
1387 fsp->share_access = share_access;
1388 fsp->fh->private_options = create_options;
1389 fsp->access_mask = open_access_mask; /* We change this to the
1390 * requested access_mask after
1391 * the open is done. */
1392 /* Ensure no SAMBA_PRIVATE bits can be set. */
1393 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1394
1395 if (timeval_is_zero(&request_time)) {
1396 request_time = fsp->open_time;
1397 }
1398
1399 if (file_existed) {
1400 dev = psbuf->st_dev;
1401 inode = psbuf->st_ino;
1402
1403 lck = get_share_mode_lock(NULL, dev, inode,
1404 conn->connectpath,
1405 fname);
1406
1407 if (lck == NULL) {
1408 file_free(fsp);
1409 DEBUG(0, ("Could not get share mode lock\n"));
1410 return NT_STATUS_SHARING_VIOLATION;
1411 }
1412
1413 /* First pass - send break only on batch oplocks. */
1414 if (delay_for_oplocks(lck, fsp, 1, oplock_request)) {
1415 schedule_defer_open(lck, request_time);
1416 TALLOC_FREE(lck);
1417 file_free(fsp);
1418 return NT_STATUS_SHARING_VIOLATION;
1419 }
1420
1421 /* Use the client requested access mask here, not the one we
1422 * open with. */
1423 status = open_mode_check(conn, fname, lck,
1424 access_mask, share_access,
1425 create_options, &file_existed);
1426
1427 if (NT_STATUS_IS_OK(status)) {
1428 /* We might be going to allow this open. Check oplock
1429 * status again. */
1430 /* Second pass - send break for both batch or
1431 * exclusive oplocks. */
1432 if (delay_for_oplocks(lck, fsp, 2, oplock_request)) {
1433 schedule_defer_open(lck, request_time);
1434 TALLOC_FREE(lck);
1435 file_free(fsp);
1436 return NT_STATUS_SHARING_VIOLATION;
1437 }
1438 }
1439
1440 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
1441 /* DELETE_PENDING is not deferred for a second */
1442 TALLOC_FREE(lck);
1443 file_free(fsp);
1444 return status;
1445 }
1446
1447 if (!NT_STATUS_IS_OK(status)) {
1448 uint32 can_access_mask;
1449 BOOL can_access = True;
1450
1451 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
1452
1453 /* Check if this can be done with the deny_dos and fcb
1454 * calls. */
1455 if (create_options &
1456 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
1457 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
1458 files_struct *fsp_dup;
1459
1460 /* Use the client requested access mask here,
1461 * not the one we open with. */
1462 fsp_dup = fcb_or_dos_open(conn, fname, dev,
1463 inode, access_mask,
1464 share_access,
1465 create_options);
1466
1467 if (fsp_dup) {
1468 TALLOC_FREE(lck);
1469 file_free(fsp);
1470 if (pinfo) {
1471 *pinfo = FILE_WAS_OPENED;
1472 }
1473 conn->num_files_open++;
1474 *result = fsp_dup;
1475 return NT_STATUS_OK;
1476 }
1477 }
1478
1479 /*
1480 * This next line is a subtlety we need for
1481 * MS-Access. If a file open will fail due to share
1482 * permissions and also for security (access) reasons,
1483 * we need to return the access failed error, not the
1484 * share error. We can't open the file due to kernel
1485 * oplock deadlock (it's possible we failed above on
1486 * the open_mode_check()) so use a userspace check.
1487 */
1488
1489 if (flags & O_RDWR) {
1490 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
1491 } else if (flags & O_WRONLY) {
1492 can_access_mask = FILE_WRITE_DATA;
1493 } else {
1494 can_access_mask = FILE_READ_DATA;
1495 }
1496
1497 if (((can_access_mask & FILE_WRITE_DATA) && !CAN_WRITE(conn)) ||
1498 !can_access_file(conn,fname,psbuf,can_access_mask)) {
1499 can_access = False;
1500 }
1501
1502 /*
1503 * If we're returning a share violation, ensure we
1504 * cope with the braindead 1 second delay.
1505 */
1506
1507 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
1508 lp_defer_sharing_violations()) {
1509 struct timeval timeout;
1510 struct deferred_open_record state;
1511 int timeout_usecs;
1512
1513 /* this is a hack to speed up torture tests
1514 in 'make test' */
1515 timeout_usecs = lp_parm_int(SNUM(conn),
1516 "smbd","sharedelay",
1517 SHARING_VIOLATION_USEC_WAIT);
1518
1519 /* This is a relative time, added to the absolute
1520 request_time value to get the absolute timeout time.
1521 Note that if this is the second or greater time we enter
1522 this codepath for this particular request mid then
1523 request_time is left as the absolute time of the *first*
1524 time this request mid was processed. This is what allows
1525 the request to eventually time out. */
1526
1527 timeout = timeval_set(0, timeout_usecs);
1528
1529 /* Nothing actually uses state.delayed_for_oplocks
1530 but it's handy to differentiate in debug messages
1531 between a 30 second delay due to oplock break, and
1532 a 1 second delay for share mode conflicts. */
1533
1534 state.delayed_for_oplocks = False;
1535 state.dev = dev;
1536 state.inode = inode;
1537
1538 if (!request_timed_out(request_time,
1539 timeout)) {
1540 defer_open(lck, request_time, timeout,
1541 &state);
1542 }
1543 }
1544
1545 TALLOC_FREE(lck);
1546 if (can_access) {
1547 /*
1548 * We have detected a sharing violation here
1549 * so return the correct error code
1550 */
1551 status = NT_STATUS_SHARING_VIOLATION;
1552 } else {
1553 status = NT_STATUS_ACCESS_DENIED;
1554 }
1555 file_free(fsp);
1556 return status;
1557 }
1558
1559 /*
1560 * We exit this block with the share entry *locked*.....
1561 */
1562 }
1563
1564 SMB_ASSERT(!file_existed || (lck != NULL));
1565
1566 /*
1567 * Ensure we pay attention to default ACLs on directories if required.
1568 */
1569
1570 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
1571 (def_acl = directory_has_default_acl(conn, parent_dir))) {
1572 unx_mode = 0777;
1573 }
1574
1575 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
1576 "access_mask = 0x%x, open_access_mask = 0x%x\n",
1577 (unsigned int)flags, (unsigned int)flags2,
1578 (unsigned int)unx_mode, (unsigned int)access_mask,
1579 (unsigned int)open_access_mask));
1580
1581 /*
1582 * open_file strips any O_TRUNC flags itself.
1583 */
1584
1585 fsp_open = open_file(fsp, conn, parent_dir, newname, fname, psbuf,
1586 flags|flags2, unx_mode, access_mask,
1587 open_access_mask);
1588
1589 if (!NT_STATUS_IS_OK(fsp_open)) {
1590 if (lck != NULL) {
1591 TALLOC_FREE(lck);
1592 }
1593 file_free(fsp);
1594 return fsp_open;
1595 }
1596
1597 if (!file_existed) {
1598
1599 /*
1600 * Deal with the race condition where two smbd's detect the
1601 * file doesn't exist and do the create at the same time. One
1602 * of them will win and set a share mode, the other (ie. this
1603 * one) should check if the requested share mode for this
1604 * create is allowed.
1605 */
1606
1607 /*
1608 * Now the file exists and fsp is successfully opened,
1609 * fsp->dev and fsp->inode are valid and should replace the
1610 * dev=0,inode=0 from a non existent file. Spotted by
1611 * Nadav Danieli <nadavd@exanet.com>. JRA.
1612 */
1613
1614 dev = fsp->dev;
1615 inode = fsp->inode;
1616
1617 lck = get_share_mode_lock(NULL, dev, inode,
1618 conn->connectpath,
1619 fname);
1620
1621 if (lck == NULL) {
1622 DEBUG(0, ("open_file_ntcreate: Could not get share "
1623 "mode lock for %s\n", fname));
1624 fd_close(conn, fsp);
1625 file_free(fsp);
1626 return NT_STATUS_SHARING_VIOLATION;
1627 }
1628
1629 status = open_mode_check(conn, fname, lck,
1630 access_mask, share_access,
1631 create_options, &file_existed);
1632
1633 if (!NT_STATUS_IS_OK(status)) {
1634 struct deferred_open_record state;
1635
1636 fd_close(conn, fsp);
1637 file_free(fsp);
1638
1639 state.delayed_for_oplocks = False;
1640 state.dev = dev;
1641 state.inode = inode;
1642
1643 /* Do it all over again immediately. In the second
1644 * round we will find that the file existed and handle
1645 * the DELETE_PENDING and FCB cases correctly. No need
1646 * to duplicate the code here. Essentially this is a
1647 * "goto top of this function", but don't tell
1648 * anybody... */
1649
1650 defer_open(lck, request_time, timeval_zero(),
1651 &state);
1652 TALLOC_FREE(lck);
1653 return status;
1654 }
1655
1656 /*
1657 * We exit this block with the share entry *locked*.....
1658 */
1659
1660 }
1661
1662 SMB_ASSERT(lck != NULL);
1663
1664 /* note that we ignore failure for the following. It is
1665 basically a hack for NFS, and NFS will never set one of
1666 these only read them. Nobody but Samba can ever set a deny
1667 mode and we have already checked our more authoritative
1668 locking database for permission to set this deny mode. If
1669 the kernel refuses the operations then the kernel is wrong.
1670 note that GPFS supports it as well - jmcd */
1671
1672 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, fsp->fh->fd, share_access);
1673 if(ret_flock == -1 ){
1674
1675 TALLOC_FREE(lck);
1676 fd_close(conn, fsp);
1677 file_free(fsp);
1678
1679 return NT_STATUS_SHARING_VIOLATION;
1680 }
1681
1682 /*
1683 * At this point onwards, we can guarentee that the share entry
1684 * is locked, whether we created the file or not, and that the
1685 * deny mode is compatible with all current opens.
1686 */
1687
1688 /*
1689 * If requested, truncate the file.
1690 */
1691
1692 if (flags2&O_TRUNC) {
1693 /*
1694 * We are modifing the file after open - update the stat
1695 * struct..
1696 */
1697 if ((SMB_VFS_FTRUNCATE(fsp,fsp->fh->fd,0) == -1) ||
1698 (SMB_VFS_FSTAT(fsp,fsp->fh->fd,psbuf)==-1)) {
1699 status = map_nt_error_from_unix(errno);
1700 TALLOC_FREE(lck);
1701 fd_close(conn,fsp);
1702 file_free(fsp);
1703 return status;
1704 }
1705 }
1706
1707 /* Record the options we were opened with. */
1708 fsp->share_access = share_access;
1709 fsp->fh->private_options = create_options;
1710 fsp->access_mask = access_mask;
1711
1712 if (file_existed) {
1713 /* stat opens on existing files don't get oplocks. */
1714 if (is_stat_open(open_access_mask)) {
1715 fsp->oplock_type = NO_OPLOCK;
1716 }
1717
1718 if (!(flags2 & O_TRUNC)) {
1719 info = FILE_WAS_OPENED;
1720 } else {
1721 info = FILE_WAS_OVERWRITTEN;
1722 }
1723 } else {
1724 info = FILE_WAS_CREATED;
1725 }
1726
1727 if (pinfo) {
1728 *pinfo = info;
1729 }
1730
1731 /*
1732 * Setup the oplock info in both the shared memory and
1733 * file structs.
1734 */
1735
1736 if ((fsp->oplock_type != NO_OPLOCK) &&
1737 (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK)) {
1738 if (!set_file_oplock(fsp, fsp->oplock_type)) {
1739 /* Could not get the kernel oplock */
1740 fsp->oplock_type = NO_OPLOCK;
1741 }
1742 }
1743 set_share_mode(lck, fsp, current_user.ut.uid, 0, fsp->oplock_type);
1744
1745 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED ||
1746 info == FILE_WAS_SUPERSEDED) {
1747
1748 /* Handle strange delete on close create semantics. */
1749 if (create_options & FILE_DELETE_ON_CLOSE) {
1750 status = can_set_delete_on_close(fsp, True, new_dos_attributes);
1751
1752 if (!NT_STATUS_IS_OK(status)) {
1753 /* Remember to delete the mode we just added. */
1754 del_share_mode(lck, fsp);
1755 TALLOC_FREE(lck);
1756 fd_close(conn,fsp);
1757 file_free(fsp);
1758 return status;
1759 }
1760 /* Note that here we set the *inital* delete on close flag,
1761 not the regular one. */
1762 set_delete_on_close_token(lck, &current_user.ut);
1763 lck->initial_delete_on_close = True;
1764 lck->modified = True;
1765 }
1766
1767 /* Files should be initially set as archive */
1768 if (lp_map_archive(SNUM(conn)) ||
1769 lp_store_dos_attributes(SNUM(conn))) {
1770 file_set_dosmode(conn, fname,
1771 new_dos_attributes | aARCH, NULL,
1772 parent_dir);
1773 }
1774 }
1775
1776 /*
1777 * Take care of inherited ACLs on created files - if default ACL not
1778 * selected.
1779 */
1780
1781 if (!file_existed && !def_acl) {
1782
1783 int saved_errno = errno; /* We might get ENOSYS in the next
1784 * call.. */
1785
1786 if (SMB_VFS_FCHMOD_ACL(fsp, fsp->fh->fd, unx_mode) == -1 &&
1787 errno == ENOSYS) {
1788 errno = saved_errno; /* Ignore ENOSYS */
1789 }
1790
1791 } else if (new_unx_mode) {
1792
1793 int ret = -1;
1794
1795 /* Attributes need changing. File already existed. */
1796
1797 {
1798 int saved_errno = errno; /* We might get ENOSYS in the
1799 * next call.. */
1800 ret = SMB_VFS_FCHMOD_ACL(fsp, fsp->fh->fd,
1801 new_unx_mode);
1802
1803 if (ret == -1 && errno == ENOSYS) {
1804 errno = saved_errno; /* Ignore ENOSYS */
1805 } else {
1806 DEBUG(5, ("open_file_ntcreate: reset "
1807 "attributes of file %s to 0%o\n",
1808 fname, (unsigned int)new_unx_mode));
1809 ret = 0; /* Don't do the fchmod below. */
1810 }
1811 }
1812
1813 if ((ret == -1) &&
1814 (SMB_VFS_FCHMOD(fsp, fsp->fh->fd, new_unx_mode) == -1))
1815 DEBUG(5, ("open_file_ntcreate: failed to reset "
1816 "attributes of file %s to 0%o\n",
1817 fname, (unsigned int)new_unx_mode));
1818 }
1819
1820 /* If this is a successful open, we must remove any deferred open
1821 * records. */
1822 del_deferred_open_entry(lck, mid);
1823 TALLOC_FREE(lck);
1824
1825 conn->num_files_open++;
1826
1827 *result = fsp;
1828 return NT_STATUS_OK;
1829 }
1830
1831 /****************************************************************************
1832 Open a file for for write to ensure that we can fchmod it.
1833 ****************************************************************************/
1834
1835 NTSTATUS open_file_fchmod(connection_struct *conn, const char *fname,
1836 SMB_STRUCT_STAT *psbuf, files_struct **result)
1837 {
1838 files_struct *fsp = NULL;
1839 NTSTATUS status;
1840
1841 if (!VALID_STAT(*psbuf)) {
1842 return NT_STATUS_INVALID_PARAMETER;
1843 }
1844
1845 status = file_new(conn, &fsp);
1846 if(!NT_STATUS_IS_OK(status)) {
1847 return status;
1848 }
1849
1850 /* note! we must use a non-zero desired access or we don't get
1851 a real file descriptor. Oh what a twisted web we weave. */
1852 status = open_file(fsp, conn, NULL, NULL, fname, psbuf, O_WRONLY, 0,
1853 FILE_WRITE_DATA, FILE_WRITE_DATA);
1854
1855 /*
1856 * This is not a user visible file open.
1857 * Don't set a share mode and don't increment
1858 * the conn->num_files_open.
1859 */
1860
1861 if (!NT_STATUS_IS_OK(status)) {
1862 file_free(fsp);
1863 return status;
1864 }
1865
1866 *result = fsp;
1867 return NT_STATUS_OK;
1868 }
1869
1870 /****************************************************************************
1871 Close the fchmod file fd - ensure no locks are lost.
1872 ****************************************************************************/
1873
1874 int close_file_fchmod(files_struct *fsp)
1875 {
1876 int ret = fd_close(fsp->conn, fsp);
1877 file_free(fsp);
1878 return ret;
1879 }
1880
1881 static NTSTATUS mkdir_internal(connection_struct *conn, const char *name,
1882 SMB_STRUCT_STAT *psbuf)
1883 {
1884 int ret= -1;
1885 mode_t mode;
1886 char *parent_dir;
1887 const char *dirname;
1888
1889 if(!CAN_WRITE(conn)) {
1890 DEBUG(5,("mkdir_internal: failing create on read-only share "
1891 "%s\n", lp_servicename(SNUM(conn))));
1892 return NT_STATUS_ACCESS_DENIED;
1893 }
1894
1895 if (!check_name(name, conn)) {
1896 return map_nt_error_from_unix(errno);
1897 }
1898
1899 if (!parent_dirname_talloc(tmp_talloc_ctx(), name, &parent_dir,
1900 &dirname)) {
1901 return NT_STATUS_NO_MEMORY;
1902 }
1903
1904 mode = unix_mode(conn, aDIR, name, parent_dir);
1905
1906 if ((ret=SMB_VFS_MKDIR(conn, name, mode)) != 0) {
1907 return map_nt_error_from_unix(errno);
1908 }
1909
1910 /* Ensure we're checking for a symlink here.... */
1911 /* We don't want to get caught by a symlink racer. */
1912
1913 if (SMB_VFS_LSTAT(conn, name, psbuf) == -1) {
1914 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
1915 name, strerror(errno)));
1916 return map_nt_error_from_unix(errno);
1917 }
1918
1919 if (!S_ISDIR(psbuf->st_mode)) {
1920 DEBUG(0, ("Directory just '%s' created is not a directory\n",
1921 name));
1922 return NT_STATUS_ACCESS_DENIED;
1923 }
1924
1925 if (lp_inherit_perms(SNUM(conn))) {
1926 inherit_access_acl(conn, parent_dir, name, mode);
1927 }
1928
1929 /*
1930 * Check if high bits should have been set,
1931 * then (if bits are missing): add them.
1932 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
1933 * dir.
1934 */
1935 if (mode & ~(S_IRWXU|S_IRWXG|S_IRWXO) && (mode & ~psbuf->st_mode)) {
1936 SMB_VFS_CHMOD(conn, name,
1937 psbuf->st_mode | (mode & ~psbuf->st_mode));
1938 }
1939
1940 /* Change the owner if required. */
1941 if (lp_inherit_owner(SNUM(conn))) {
1942 change_dir_owner_to_parent(conn, parent_dir, name, psbuf);
1943 }
1944
1945 return NT_STATUS_OK;
1946 }
1947
1948 /****************************************************************************
1949 Open a directory from an NT SMB call.
1950 ****************************************************************************/
1951
1952 NTSTATUS open_directory(connection_struct *conn,
1953 const char *fname,
1954 SMB_STRUCT_STAT *psbuf,
1955 uint32 access_mask,
1956 uint32 share_access,
1957 uint32 create_disposition,
1958 uint32 create_options,
1959 int *pinfo,
1960 files_struct **result)
1961 {
1962 files_struct *fsp = NULL;
1963 BOOL dir_existed = VALID_STAT(*psbuf) ? True : False;
1964 struct share_mode_lock *lck = NULL;
1965 NTSTATUS status;
1966 int info = 0;
1967
1968 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
1969 "share_access = 0x%x create_options = 0x%x, "
1970 "create_disposition = 0x%x\n",
1971 fname,
1972 (unsigned int)access_mask,
1973 (unsigned int)share_access,
1974 (unsigned int)create_options,
1975 (unsigned int)create_disposition));
1976
1977 if (is_ntfs_stream_name(fname)) {
1978 DEBUG(0,("open_directory: %s is a stream name!\n", fname ));
1979 return NT_STATUS_NOT_A_DIRECTORY;
1980 }
1981
1982 switch( create_disposition ) {
1983 case FILE_OPEN:
1984
1985 info = FILE_WAS_OPENED;
1986
1987 /*
1988 * We want to follow symlinks here.
1989 */
1990
1991 if (SMB_VFS_STAT(conn, fname, psbuf) != 0) {
1992 return map_nt_error_from_unix(errno);
1993 }
1994
1995 break;
1996
1997 case FILE_CREATE:
1998
1999 /* If directory exists error. If directory doesn't
2000 * exist create. */
2001
2002 status = mkdir_internal(conn, fname, psbuf);
2003 if (!NT_STATUS_IS_OK(status)) {
2004 DEBUG(2, ("open_directory: unable to create "
2005 "%s. Error was %s\n", fname,
2006 nt_errstr(status)));
2007 return status;
2008 }
2009
2010 info = FILE_WAS_CREATED;
2011 break;
2012
2013 case FILE_OPEN_IF:
2014 /*
2015 * If directory exists open. If directory doesn't
2016 * exist create.
2017 */
2018
2019 status = mkdir_internal(conn, fname, psbuf);
2020
2021 if (NT_STATUS_IS_OK(status)) {
2022 info = FILE_WAS_CREATED;
2023 }
2024
2025 if (NT_STATUS_EQUAL(status,
2026 NT_STATUS_OBJECT_NAME_COLLISION)) {
2027 info = FILE_WAS_OPENED;
2028 status = NT_STATUS_OK;
2029 }
2030
2031 break;
2032
2033 case FILE_SUPERSEDE:
2034 case FILE_OVERWRITE:
2035 case FILE_OVERWRITE_IF:
2036 default:
2037 DEBUG(5,("open_directory: invalid create_disposition "
2038 "0x%x for directory %s\n",
2039 (unsigned int)create_disposition, fname));
2040 return NT_STATUS_INVALID_PARAMETER;
2041 }
2042
2043 if(!S_ISDIR(psbuf->st_mode)) {
2044 DEBUG(5,("open_directory: %s is not a directory !\n",
2045 fname ));
2046 return NT_STATUS_NOT_A_DIRECTORY;
2047 }
2048
2049 status = file_new(conn, &fsp);
2050 if(!NT_STATUS_IS_OK(status)) {
2051 return status;
2052 }
2053
2054 /*
2055 * Setup the files_struct for it.
2056 */
2057
2058 fsp->mode = psbuf->st_mode;
2059 fsp->inode = psbuf->st_ino;
2060 fsp->dev = psbuf->st_dev;
2061 fsp->vuid = current_user.vuid;
2062 fsp->file_pid = global_smbpid;
2063 fsp->can_lock = False;
2064 fsp->can_read = False;
2065 fsp->can_write = False;
2066
2067 fsp->share_access = share_access;
2068 fsp->fh->private_options = create_options;
2069 fsp->access_mask = access_mask;
2070
2071 fsp->print_file = False;
2072 fsp->modified = False;
2073 fsp->oplock_type = NO_OPLOCK;
2074 fsp->sent_oplock_break = NO_BREAK_SENT;
2075 fsp->is_directory = True;
2076 fsp->is_stat = False;
2077 string_set(&fsp->fsp_name,fname);
2078
2079 lck = get_share_mode_lock(NULL, fsp->dev, fsp->inode,
2080 conn->connectpath,
2081 fname);
2082
2083 if (lck == NULL) {
2084 DEBUG(0, ("open_directory: Could not get share mode lock for %s\n", fname));
2085 file_free(fsp);
2086 return NT_STATUS_SHARING_VIOLATION;
2087 }
2088
2089 status = open_mode_check(conn, fname, lck,
2090 access_mask, share_access,
2091 create_options, &dir_existed);
2092
2093 if (!NT_STATUS_IS_OK(status)) {
2094 TALLOC_FREE(lck);
2095 file_free(fsp);
2096 return status;
2097 }
2098
2099 set_share_mode(lck, fsp, current_user.ut.uid, 0, NO_OPLOCK);
2100
2101 /* For directories the delete on close bit at open time seems
2102 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2103 if (create_options & FILE_DELETE_ON_CLOSE) {
2104 status = can_set_delete_on_close(fsp, True, 0);
2105 if (!NT_STATUS_IS_OK(status)) {
2106 TALLOC_FREE(lck);
2107 file_free(fsp);
2108 return status;
2109 }
2110
2111 set_delete_on_close_token(lck, &current_user.ut);
2112 lck->initial_delete_on_close = True;
2113 lck->modified = True;
2114 }
2115
2116 TALLOC_FREE(lck);
2117
2118 if (pinfo) {
2119 *pinfo = info;
2120 }
2121
2122 conn->num_files_open++;
2123
2124 *result = fsp;
2125 return NT_STATUS_OK;
2126 }
2127
2128 NTSTATUS create_directory(connection_struct *conn, const char *directory)
2129 {
2130 NTSTATUS status;
2131 SMB_STRUCT_STAT sbuf;
2132 files_struct *fsp;
2133
2134 SET_STAT_INVALID(sbuf);
2135
2136 status = open_directory(conn, directory, &sbuf,
2137 FILE_READ_ATTRIBUTES, /* Just a stat open */
2138 FILE_SHARE_NONE, /* Ignored for stat opens */
2139 FILE_CREATE, 0, NULL, &fsp);
2140
2141 if (NT_STATUS_IS_OK(status)) {
2142 close_file(fsp, NORMAL_CLOSE);
2143 }
2144
2145 return status;
2146 }
2147
2148 /****************************************************************************
2149 Open a pseudo-file (no locking checks - a 'stat' open).
2150 ****************************************************************************/
2151
2152 NTSTATUS open_file_stat(connection_struct *conn, const char *fname,
2153 SMB_STRUCT_STAT *psbuf, files_struct **result)
2154 {
2155 files_struct *fsp = NULL;
2156 NTSTATUS status;
2157
2158 if (!VALID_STAT(*psbuf)) {
2159 return NT_STATUS_INVALID_PARAMETER;
2160 }
2161
2162 /* Can't 'stat' open directories. */
2163 if(S_ISDIR(psbuf->st_mode)) {
2164 return NT_STATUS_FILE_IS_A_DIRECTORY;
2165 }
2166
2167 status = file_new(conn, &fsp);
2168 if(!NT_STATUS_IS_OK(status)) {
2169 return status;
2170 }
2171
2172 DEBUG(5,("open_file_stat: 'opening' file %s\n", fname));
2173
2174 /*
2175 * Setup the files_struct for it.
2176 */
2177
2178 fsp->mode = psbuf->st_mode;
2179 fsp->inode = psbuf->st_ino;
2180 fsp->dev = psbuf->st_dev;
2181 fsp->vuid = current_user.vuid;
2182 fsp->file_pid = global_smbpid;
2183 fsp->can_lock = False;
2184 fsp->can_read = False;
2185 fsp->can_write = False;
2186 fsp->print_file = False;
2187 fsp->modified = False;
2188 fsp->oplock_type = NO_OPLOCK;
2189 fsp->sent_oplock_break = NO_BREAK_SENT;
2190 fsp->is_directory = False;
2191 fsp->is_stat = True;
2192 string_set(&fsp->fsp_name,fname);
2193
2194 conn->num_files_open++;
2195
2196 *result = fsp;
2197 return NT_STATUS_OK;
2198 }
2199
2200 /****************************************************************************
2201 Receive notification that one of our open files has been renamed by another
2202 smbd process.
2203 ****************************************************************************/
2204
2205 void msg_file_was_renamed(int msg_type, struct process_id src, void *buf, size_t len)
2206 {
2207 files_struct *fsp;
2208 char *frm = (char *)buf;
2209 SMB_DEV_T dev;
2210 SMB_INO_T inode;
2211 const char *sharepath;
2212 const char *newname;
2213 size_t sp_len;
2214
2215 if (buf == NULL || len < MSG_FILE_RENAMED_MIN_SIZE + 2) {
2216 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n", (int)len));
2217 return;
2218 }
2219
2220 /* Unpack the message. */
2221 dev = DEV_T_VAL(frm,0);
2222 inode = INO_T_VAL(frm,8);
2223 sharepath = &frm[16];
2224 newname = sharepath + strlen(sharepath) + 1;
2225 sp_len = strlen(sharepath);
2226
2227 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
2228 "dev %x, inode %.0f\n",
2229 sharepath, newname, (unsigned int)dev, (double)inode ));
2230
2231 for(fsp = file_find_di_first(dev, inode); fsp; fsp = file_find_di_next(fsp)) {
2232 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
2233 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
2234 fsp->fnum, fsp->fsp_name, newname ));
2235 string_set(&fsp->fsp_name, newname);
2236 } else {
2237 /* TODO. JRA. */
2238 /* Now we have the complete path we can work out if this is
2239 actually within this share and adjust newname accordingly. */
2240 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
2241 "not sharepath %s) "
2242 "fnum %d from %s -> %s\n",
2243 fsp->conn->connectpath,
2244 sharepath,
2245 fsp->fnum,
2246 fsp->fsp_name,
2247 newname ));
2248 }
2249 }
2250 }
Samba GIT mirror