s3: Fix rejecting mkdir on read-only shares
[Samba.git] / source3 / smbd / open.c
blob40a64115e107a4630f97456a15f6bedba3976e1f
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
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
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.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #include "includes.h"
23 #include "system/filesys.h"
24 #include "printing.h"
25 #include "smbd/smbd.h"
26 #include "smbd/globals.h"
27 #include "fake_file.h"
28 #include "../libcli/security/security.h"
29 #include "../librpc/gen_ndr/ndr_security.h"
30 #include "../librpc/gen_ndr/open_files.h"
31 #include "auth.h"
32 #include "serverid.h"
33 #include "messages.h"
35 extern const struct generic_mapping file_generic_mapping;
37 struct deferred_open_record {
38 bool delayed_for_oplocks;
39 bool async_open;
40 struct file_id id;
43 /****************************************************************************
44 If the requester wanted DELETE_ACCESS and was rejected because
45 the file ACL didn't include DELETE_ACCESS, see if the parent ACL
46 overrides this.
47 ****************************************************************************/
49 static bool parent_override_delete(connection_struct *conn,
50 const struct smb_filename *smb_fname,
51 uint32_t access_mask,
52 uint32_t rejected_mask)
54 if ((access_mask & DELETE_ACCESS) &&
55 (rejected_mask & DELETE_ACCESS) &&
56 can_delete_file_in_directory(conn, smb_fname)) {
57 return true;
59 return false;
62 /****************************************************************************
63 Check if we have open rights.
64 ****************************************************************************/
66 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
67 const struct smb_filename *smb_fname,
68 bool use_privs,
69 uint32_t access_mask)
71 /* Check if we have rights to open. */
72 NTSTATUS status;
73 struct security_descriptor *sd = NULL;
74 uint32_t rejected_share_access;
75 uint32_t rejected_mask = access_mask;
77 rejected_share_access = access_mask & ~(conn->share_access);
79 if (rejected_share_access) {
80 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
81 "on %s (0x%x)\n",
82 (unsigned int)access_mask,
83 smb_fname_str_dbg(smb_fname),
84 (unsigned int)rejected_share_access ));
85 return NT_STATUS_ACCESS_DENIED;
88 if (!use_privs && get_current_uid(conn) == (uid_t)0) {
89 /* I'm sorry sir, I didn't know you were root... */
90 DEBUG(10,("smbd_check_access_rights: root override "
91 "on %s. Granting 0x%x\n",
92 smb_fname_str_dbg(smb_fname),
93 (unsigned int)access_mask ));
94 return NT_STATUS_OK;
97 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
98 DEBUG(10,("smbd_check_access_rights: not checking ACL "
99 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
100 smb_fname_str_dbg(smb_fname),
101 (unsigned int)access_mask ));
102 return NT_STATUS_OK;
105 if (access_mask == DELETE_ACCESS &&
106 VALID_STAT(smb_fname->st) &&
107 S_ISLNK(smb_fname->st.st_ex_mode)) {
108 /* We can always delete a symlink. */
109 DEBUG(10,("smbd_check_access_rights: not checking ACL "
110 "on DELETE_ACCESS on symlink %s.\n",
111 smb_fname_str_dbg(smb_fname) ));
112 return NT_STATUS_OK;
115 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
116 (SECINFO_OWNER |
117 SECINFO_GROUP |
118 SECINFO_DACL),&sd);
120 if (!NT_STATUS_IS_OK(status)) {
121 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
122 "on %s: %s\n",
123 smb_fname_str_dbg(smb_fname),
124 nt_errstr(status)));
126 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
127 goto access_denied;
130 return status;
134 * Never test FILE_READ_ATTRIBUTES. se_file_access_check() also takes care of
135 * owner WRITE_DAC and READ_CONTROL.
137 status = se_file_access_check(sd,
138 get_current_nttok(conn),
139 use_privs,
140 (access_mask & ~FILE_READ_ATTRIBUTES),
141 &rejected_mask);
143 DEBUG(10,("smbd_check_access_rights: file %s requesting "
144 "0x%x returning 0x%x (%s)\n",
145 smb_fname_str_dbg(smb_fname),
146 (unsigned int)access_mask,
147 (unsigned int)rejected_mask,
148 nt_errstr(status) ));
150 if (!NT_STATUS_IS_OK(status)) {
151 if (DEBUGLEVEL >= 10) {
152 DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
153 smb_fname_str_dbg(smb_fname) ));
154 NDR_PRINT_DEBUG(security_descriptor, sd);
158 TALLOC_FREE(sd);
160 if (NT_STATUS_IS_OK(status) ||
161 !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
162 return status;
165 /* Here we know status == NT_STATUS_ACCESS_DENIED. */
167 access_denied:
169 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
170 (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
171 !lp_store_dos_attributes(SNUM(conn)) &&
172 (lp_map_readonly(SNUM(conn)) ||
173 lp_map_archive(SNUM(conn)) ||
174 lp_map_hidden(SNUM(conn)) ||
175 lp_map_system(SNUM(conn)))) {
176 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
178 DEBUG(10,("smbd_check_access_rights: "
179 "overrode "
180 "FILE_WRITE_ATTRIBUTES "
181 "on file %s\n",
182 smb_fname_str_dbg(smb_fname)));
185 if (parent_override_delete(conn,
186 smb_fname,
187 access_mask,
188 rejected_mask)) {
189 /* Were we trying to do an open
190 * for delete and didn't get DELETE
191 * access (only) ? Check if the
192 * directory allows DELETE_CHILD.
193 * See here:
194 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
195 * for details. */
197 rejected_mask &= ~DELETE_ACCESS;
199 DEBUG(10,("smbd_check_access_rights: "
200 "overrode "
201 "DELETE_ACCESS on "
202 "file %s\n",
203 smb_fname_str_dbg(smb_fname)));
206 if (rejected_mask != 0) {
207 return NT_STATUS_ACCESS_DENIED;
209 return NT_STATUS_OK;
212 static NTSTATUS check_parent_access(struct connection_struct *conn,
213 struct smb_filename *smb_fname,
214 uint32_t access_mask)
216 NTSTATUS status;
217 char *parent_dir = NULL;
218 struct security_descriptor *parent_sd = NULL;
219 uint32_t access_granted = 0;
221 if (!parent_dirname(talloc_tos(),
222 smb_fname->base_name,
223 &parent_dir,
224 NULL)) {
225 return NT_STATUS_NO_MEMORY;
228 if (get_current_uid(conn) == (uid_t)0) {
229 /* I'm sorry sir, I didn't know you were root... */
230 DEBUG(10,("check_parent_access: root override "
231 "on %s. Granting 0x%x\n",
232 smb_fname_str_dbg(smb_fname),
233 (unsigned int)access_mask ));
234 return NT_STATUS_OK;
237 status = SMB_VFS_GET_NT_ACL(conn,
238 parent_dir,
239 SECINFO_DACL,
240 &parent_sd);
242 if (!NT_STATUS_IS_OK(status)) {
243 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
244 "%s with error %s\n",
245 parent_dir,
246 nt_errstr(status)));
247 return status;
251 * Never test FILE_READ_ATTRIBUTES. se_file_access_check() also takes care of
252 * owner WRITE_DAC and READ_CONTROL.
254 status = se_file_access_check(parent_sd,
255 get_current_nttok(conn),
256 false,
257 (access_mask & ~FILE_READ_ATTRIBUTES),
258 &access_granted);
259 if(!NT_STATUS_IS_OK(status)) {
260 DEBUG(5,("check_parent_access: access check "
261 "on directory %s for "
262 "path %s for mask 0x%x returned (0x%x) %s\n",
263 parent_dir,
264 smb_fname->base_name,
265 access_mask,
266 access_granted,
267 nt_errstr(status) ));
268 return status;
271 return NT_STATUS_OK;
274 /****************************************************************************
275 fd support routines - attempt to do a dos_open.
276 ****************************************************************************/
278 NTSTATUS fd_open(struct connection_struct *conn,
279 files_struct *fsp,
280 int flags,
281 mode_t mode)
283 struct smb_filename *smb_fname = fsp->fsp_name;
284 NTSTATUS status = NT_STATUS_OK;
286 #ifdef O_NOFOLLOW
288 * Never follow symlinks on a POSIX client. The
289 * client should be doing this.
292 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
293 flags |= O_NOFOLLOW;
295 #endif
297 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
298 if (fsp->fh->fd == -1) {
299 int posix_errno = errno;
300 #ifdef O_NOFOLLOW
301 #if defined(ENOTSUP) && defined(OSF1)
302 /* handle special Tru64 errno */
303 if (errno == ENOTSUP) {
304 posix_errno = ELOOP;
306 #endif /* ENOTSUP */
307 #ifdef EFTYPE
308 /* fix broken NetBSD errno */
309 if (errno == EFTYPE) {
310 posix_errno = ELOOP;
312 #endif /* EFTYPE */
313 /* fix broken FreeBSD errno */
314 if (errno == EMLINK) {
315 posix_errno = ELOOP;
317 #endif /* O_NOFOLLOW */
318 status = map_nt_error_from_unix(posix_errno);
319 if (errno == EMFILE) {
320 static time_t last_warned = 0L;
322 if (time((time_t *) NULL) > last_warned) {
323 DEBUG(0,("Too many open files, unable "
324 "to open more! smbd's max "
325 "open files = %d\n",
326 lp_max_open_files()));
327 last_warned = time((time_t *) NULL);
333 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
334 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
335 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
337 return status;
340 /****************************************************************************
341 Close the file associated with a fsp.
342 ****************************************************************************/
344 NTSTATUS fd_close(files_struct *fsp)
346 int ret;
348 if (fsp->dptr) {
349 dptr_CloseDir(fsp);
351 if (fsp->fh->fd == -1) {
352 return NT_STATUS_OK; /* What we used to call a stat open. */
354 if (fsp->fh->ref_count > 1) {
355 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
358 ret = SMB_VFS_CLOSE(fsp);
359 fsp->fh->fd = -1;
360 if (ret == -1) {
361 return map_nt_error_from_unix(errno);
363 return NT_STATUS_OK;
366 /****************************************************************************
367 Change the ownership of a file to that of the parent directory.
368 Do this by fd if possible.
369 ****************************************************************************/
371 void change_file_owner_to_parent(connection_struct *conn,
372 const char *inherit_from_dir,
373 files_struct *fsp)
375 struct smb_filename *smb_fname_parent = NULL;
376 NTSTATUS status;
377 int ret;
379 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
380 NULL, NULL, &smb_fname_parent);
381 if (!NT_STATUS_IS_OK(status)) {
382 return;
385 ret = SMB_VFS_STAT(conn, smb_fname_parent);
386 if (ret == -1) {
387 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
388 "directory %s. Error was %s\n",
389 smb_fname_str_dbg(smb_fname_parent),
390 strerror(errno)));
391 TALLOC_FREE(smb_fname_parent);
392 return;
395 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
396 /* Already this uid - no need to change. */
397 DEBUG(10,("change_file_owner_to_parent: file %s "
398 "is already owned by uid %d\n",
399 fsp_str_dbg(fsp),
400 (int)fsp->fsp_name->st.st_ex_uid ));
401 TALLOC_FREE(smb_fname_parent);
402 return;
405 become_root();
406 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
407 unbecome_root();
408 if (ret == -1) {
409 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
410 "file %s to parent directory uid %u. Error "
411 "was %s\n", fsp_str_dbg(fsp),
412 (unsigned int)smb_fname_parent->st.st_ex_uid,
413 strerror(errno) ));
414 } else {
415 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
416 "parent directory uid %u.\n", fsp_str_dbg(fsp),
417 (unsigned int)smb_fname_parent->st.st_ex_uid));
418 /* Ensure the uid entry is updated. */
419 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
422 TALLOC_FREE(smb_fname_parent);
425 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
426 const char *inherit_from_dir,
427 const char *fname,
428 SMB_STRUCT_STAT *psbuf)
430 struct smb_filename *smb_fname_parent = NULL;
431 struct smb_filename *smb_fname_cwd = NULL;
432 char *saved_dir = NULL;
433 TALLOC_CTX *ctx = talloc_tos();
434 NTSTATUS status = NT_STATUS_OK;
435 int ret;
437 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
438 &smb_fname_parent);
439 if (!NT_STATUS_IS_OK(status)) {
440 return status;
443 ret = SMB_VFS_STAT(conn, smb_fname_parent);
444 if (ret == -1) {
445 status = map_nt_error_from_unix(errno);
446 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
447 "directory %s. Error was %s\n",
448 smb_fname_str_dbg(smb_fname_parent),
449 strerror(errno)));
450 goto out;
453 /* We've already done an lstat into psbuf, and we know it's a
454 directory. If we can cd into the directory and the dev/ino
455 are the same then we can safely chown without races as
456 we're locking the directory in place by being in it. This
457 should work on any UNIX (thanks tridge :-). JRA.
460 saved_dir = vfs_GetWd(ctx,conn);
461 if (!saved_dir) {
462 status = map_nt_error_from_unix(errno);
463 DEBUG(0,("change_dir_owner_to_parent: failed to get "
464 "current working directory. Error was %s\n",
465 strerror(errno)));
466 goto out;
469 /* Chdir into the new path. */
470 if (vfs_ChDir(conn, fname) == -1) {
471 status = map_nt_error_from_unix(errno);
472 DEBUG(0,("change_dir_owner_to_parent: failed to change "
473 "current working directory to %s. Error "
474 "was %s\n", fname, strerror(errno) ));
475 goto chdir;
478 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
479 &smb_fname_cwd);
480 if (!NT_STATUS_IS_OK(status)) {
481 return status;
484 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
485 if (ret == -1) {
486 status = map_nt_error_from_unix(errno);
487 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
488 "directory '.' (%s) Error was %s\n",
489 fname, strerror(errno)));
490 goto chdir;
493 /* Ensure we're pointing at the same place. */
494 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
495 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
496 DEBUG(0,("change_dir_owner_to_parent: "
497 "device/inode on directory %s changed. "
498 "Refusing to chown !\n", fname ));
499 status = NT_STATUS_ACCESS_DENIED;
500 goto chdir;
503 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
504 /* Already this uid - no need to change. */
505 DEBUG(10,("change_dir_owner_to_parent: directory %s "
506 "is already owned by uid %d\n",
507 fname,
508 (int)smb_fname_cwd->st.st_ex_uid ));
509 status = NT_STATUS_OK;
510 goto chdir;
513 become_root();
514 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
515 (gid_t)-1);
516 unbecome_root();
517 if (ret == -1) {
518 status = map_nt_error_from_unix(errno);
519 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
520 "directory %s to parent directory uid %u. "
521 "Error was %s\n", fname,
522 (unsigned int)smb_fname_parent->st.st_ex_uid,
523 strerror(errno) ));
524 } else {
525 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
526 "directory %s to parent directory uid %u.\n",
527 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
528 /* Ensure the uid entry is updated. */
529 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
532 chdir:
533 vfs_ChDir(conn,saved_dir);
534 out:
535 TALLOC_FREE(smb_fname_parent);
536 TALLOC_FREE(smb_fname_cwd);
537 return status;
540 /****************************************************************************
541 Open a file - returning a guaranteed ATOMIC indication of if the
542 file was created or not.
543 ****************************************************************************/
545 static NTSTATUS fd_open_atomic(struct connection_struct *conn,
546 files_struct *fsp,
547 int flags,
548 mode_t mode,
549 bool *file_created)
551 NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
552 bool file_existed = VALID_STAT(fsp->fsp_name->st);
554 *file_created = false;
556 if (!(flags & O_CREAT)) {
558 * We're not creating the file, just pass through.
560 return fd_open(conn, fsp, flags, mode);
563 if (flags & O_EXCL) {
565 * Fail if already exists, just pass through.
567 status = fd_open(conn, fsp, flags, mode);
570 * Here we've opened with O_CREAT|O_EXCL. If that went
571 * NT_STATUS_OK, we *know* we created this file.
573 *file_created = NT_STATUS_IS_OK(status);
575 return status;
579 * Now it gets tricky. We have O_CREAT, but not O_EXCL.
580 * To know absolutely if we created the file or not,
581 * we can never call O_CREAT without O_EXCL. So if
582 * we think the file existed, try without O_CREAT|O_EXCL.
583 * If we think the file didn't exist, try with
584 * O_CREAT|O_EXCL. Keep bouncing between these two
585 * requests until either the file is created, or
586 * opened. Either way, we keep going until we get
587 * a returnable result (error, or open/create).
590 while(1) {
591 int curr_flags = flags;
593 if (file_existed) {
594 /* Just try open, do not create. */
595 curr_flags &= ~(O_CREAT);
596 status = fd_open(conn, fsp, curr_flags, mode);
597 if (NT_STATUS_EQUAL(status,
598 NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
600 * Someone deleted it in the meantime.
601 * Retry with O_EXCL.
603 file_existed = false;
604 DEBUG(10,("fd_open_atomic: file %s existed. "
605 "Retry.\n",
606 smb_fname_str_dbg(fsp->fsp_name)));
607 continue;
609 } else {
610 /* Try create exclusively, fail if it exists. */
611 curr_flags |= O_EXCL;
612 status = fd_open(conn, fsp, curr_flags, mode);
613 if (NT_STATUS_EQUAL(status,
614 NT_STATUS_OBJECT_NAME_COLLISION)) {
616 * Someone created it in the meantime.
617 * Retry without O_CREAT.
619 file_existed = true;
620 DEBUG(10,("fd_open_atomic: file %s "
621 "did not exist. Retry.\n",
622 smb_fname_str_dbg(fsp->fsp_name)));
623 continue;
625 if (NT_STATUS_IS_OK(status)) {
627 * Here we've opened with O_CREAT|O_EXCL
628 * and got success. We *know* we created
629 * this file.
631 *file_created = true;
634 /* Create is done, or failed. */
635 break;
637 return status;
640 /****************************************************************************
641 Open a file.
642 ****************************************************************************/
644 static NTSTATUS open_file(files_struct *fsp,
645 connection_struct *conn,
646 struct smb_request *req,
647 const char *parent_dir,
648 int flags,
649 mode_t unx_mode,
650 uint32 access_mask, /* client requested access mask. */
651 uint32 open_access_mask, /* what we're actually using in the open. */
652 bool *p_file_created)
654 struct smb_filename *smb_fname = fsp->fsp_name;
655 NTSTATUS status = NT_STATUS_OK;
656 int accmode = (flags & O_ACCMODE);
657 int local_flags = flags;
658 bool file_existed = VALID_STAT(fsp->fsp_name->st);
660 fsp->fh->fd = -1;
661 errno = EPERM;
663 /* Check permissions */
666 * This code was changed after seeing a client open request
667 * containing the open mode of (DENY_WRITE/read-only) with
668 * the 'create if not exist' bit set. The previous code
669 * would fail to open the file read only on a read-only share
670 * as it was checking the flags parameter directly against O_RDONLY,
671 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
672 * JRA.
675 if (!CAN_WRITE(conn)) {
676 /* It's a read-only share - fail if we wanted to write. */
677 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
678 DEBUG(3,("Permission denied opening %s\n",
679 smb_fname_str_dbg(smb_fname)));
680 return NT_STATUS_ACCESS_DENIED;
682 if (flags & O_CREAT) {
683 /* We don't want to write - but we must make sure that
684 O_CREAT doesn't create the file if we have write
685 access into the directory.
687 flags &= ~(O_CREAT|O_EXCL);
688 local_flags &= ~(O_CREAT|O_EXCL);
693 * This little piece of insanity is inspired by the
694 * fact that an NT client can open a file for O_RDONLY,
695 * but set the create disposition to FILE_EXISTS_TRUNCATE.
696 * If the client *can* write to the file, then it expects to
697 * truncate the file, even though it is opening for readonly.
698 * Quicken uses this stupid trick in backup file creation...
699 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
700 * for helping track this one down. It didn't bite us in 2.0.x
701 * as we always opened files read-write in that release. JRA.
704 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
705 DEBUG(10,("open_file: truncate requested on read-only open "
706 "for file %s\n", smb_fname_str_dbg(smb_fname)));
707 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
710 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
711 (!file_existed && (local_flags & O_CREAT)) ||
712 ((local_flags & O_TRUNC) == O_TRUNC) ) {
713 const char *wild;
714 int ret;
716 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
718 * We would block on opening a FIFO with no one else on the
719 * other end. Do what we used to do and add O_NONBLOCK to the
720 * open flags. JRA.
723 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
724 local_flags &= ~O_TRUNC; /* Can't truncate a FIFO. */
725 local_flags |= O_NONBLOCK;
727 #endif
729 /* Don't create files with Microsoft wildcard characters. */
730 if (fsp->base_fsp) {
732 * wildcard characters are allowed in stream names
733 * only test the basefilename
735 wild = fsp->base_fsp->fsp_name->base_name;
736 } else {
737 wild = smb_fname->base_name;
739 if ((local_flags & O_CREAT) && !file_existed &&
740 ms_has_wild(wild)) {
741 return NT_STATUS_OBJECT_NAME_INVALID;
744 /* Can we access this file ? */
745 if (!fsp->base_fsp) {
746 /* Only do this check on non-stream open. */
747 if (file_existed) {
748 status = smbd_check_access_rights(conn,
749 smb_fname,
750 false,
751 access_mask);
752 } else if (local_flags & O_CREAT){
753 status = check_parent_access(conn,
754 smb_fname,
755 SEC_DIR_ADD_FILE);
756 } else {
757 /* File didn't exist and no O_CREAT. */
758 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
760 if (!NT_STATUS_IS_OK(status)) {
761 DEBUG(10,("open_file: "
762 "%s on file "
763 "%s returned %s\n",
764 file_existed ?
765 "smbd_check_access_rights" :
766 "check_parent_access",
767 smb_fname_str_dbg(smb_fname),
768 nt_errstr(status) ));
769 return status;
773 /* Actually do the open */
774 status = fd_open_atomic(conn, fsp, local_flags,
775 unx_mode, p_file_created);
776 if (!NT_STATUS_IS_OK(status)) {
777 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
778 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
779 nt_errstr(status),local_flags,flags));
780 return status;
783 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
784 if (ret == -1) {
785 /* If we have an fd, this stat should succeed. */
786 DEBUG(0,("Error doing fstat on open file %s "
787 "(%s)\n",
788 smb_fname_str_dbg(smb_fname),
789 strerror(errno) ));
790 status = map_nt_error_from_unix(errno);
791 fd_close(fsp);
792 return status;
795 if (*p_file_created) {
796 /* We created this file. */
798 bool need_re_stat = false;
799 /* Do all inheritance work after we've
800 done a successful fstat call and filled
801 in the stat struct in fsp->fsp_name. */
803 /* Inherit the ACL if required */
804 if (lp_inherit_perms(SNUM(conn))) {
805 inherit_access_posix_acl(conn, parent_dir,
806 smb_fname->base_name,
807 unx_mode);
808 need_re_stat = true;
811 /* Change the owner if required. */
812 if (lp_inherit_owner(SNUM(conn))) {
813 change_file_owner_to_parent(conn, parent_dir,
814 fsp);
815 need_re_stat = true;
818 if (need_re_stat) {
819 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
820 /* If we have an fd, this stat should succeed. */
821 if (ret == -1) {
822 DEBUG(0,("Error doing fstat on open file %s "
823 "(%s)\n",
824 smb_fname_str_dbg(smb_fname),
825 strerror(errno) ));
829 notify_fname(conn, NOTIFY_ACTION_ADDED,
830 FILE_NOTIFY_CHANGE_FILE_NAME,
831 smb_fname->base_name);
833 } else {
834 fsp->fh->fd = -1; /* What we used to call a stat open. */
835 if (!file_existed) {
836 /* File must exist for a stat open. */
837 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
840 status = smbd_check_access_rights(conn,
841 smb_fname,
842 false,
843 access_mask);
845 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
846 fsp->posix_open &&
847 S_ISLNK(smb_fname->st.st_ex_mode)) {
848 /* This is a POSIX stat open for delete
849 * or rename on a symlink that points
850 * nowhere. Allow. */
851 DEBUG(10,("open_file: allowing POSIX "
852 "open on bad symlink %s\n",
853 smb_fname_str_dbg(smb_fname)));
854 status = NT_STATUS_OK;
857 if (!NT_STATUS_IS_OK(status)) {
858 DEBUG(10,("open_file: "
859 "smbd_check_access_rights on file "
860 "%s returned %s\n",
861 smb_fname_str_dbg(smb_fname),
862 nt_errstr(status) ));
863 return status;
868 * POSIX allows read-only opens of directories. We don't
869 * want to do this (we use a different code path for this)
870 * so catch a directory open and return an EISDIR. JRA.
873 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
874 fd_close(fsp);
875 errno = EISDIR;
876 return NT_STATUS_FILE_IS_A_DIRECTORY;
879 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
880 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
881 fsp->file_pid = req ? req->smbpid : 0;
882 fsp->can_lock = True;
883 fsp->can_read = ((access_mask & FILE_READ_DATA) != 0);
884 fsp->can_write =
885 CAN_WRITE(conn) &&
886 ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0);
887 fsp->print_file = NULL;
888 fsp->modified = False;
889 fsp->sent_oplock_break = NO_BREAK_SENT;
890 fsp->is_directory = False;
891 if (conn->aio_write_behind_list &&
892 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
893 conn->case_sensitive)) {
894 fsp->aio_write_behind = True;
897 fsp->wcp = NULL; /* Write cache pointer. */
899 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
900 conn->session_info->unix_info->unix_name,
901 smb_fname_str_dbg(smb_fname),
902 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
903 conn->num_files_open));
905 errno = 0;
906 return NT_STATUS_OK;
909 /****************************************************************************
910 Check if we can open a file with a share mode.
911 Returns True if conflict, False if not.
912 ****************************************************************************/
914 static bool share_conflict(struct share_mode_entry *entry,
915 uint32 access_mask,
916 uint32 share_access)
918 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
919 "entry->share_access = 0x%x, "
920 "entry->private_options = 0x%x\n",
921 (unsigned int)entry->access_mask,
922 (unsigned int)entry->share_access,
923 (unsigned int)entry->private_options));
925 if (server_id_is_disconnected(&entry->pid)) {
927 * note: cleanup should have been done by
928 * delay_for_batch_oplocks()
930 return false;
933 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
934 (unsigned int)access_mask, (unsigned int)share_access));
936 if ((entry->access_mask & (FILE_WRITE_DATA|
937 FILE_APPEND_DATA|
938 FILE_READ_DATA|
939 FILE_EXECUTE|
940 DELETE_ACCESS)) == 0) {
941 DEBUG(10,("share_conflict: No conflict due to "
942 "entry->access_mask = 0x%x\n",
943 (unsigned int)entry->access_mask ));
944 return False;
947 if ((access_mask & (FILE_WRITE_DATA|
948 FILE_APPEND_DATA|
949 FILE_READ_DATA|
950 FILE_EXECUTE|
951 DELETE_ACCESS)) == 0) {
952 DEBUG(10,("share_conflict: No conflict due to "
953 "access_mask = 0x%x\n",
954 (unsigned int)access_mask ));
955 return False;
958 #if 1 /* JRA TEST - Superdebug. */
959 #define CHECK_MASK(num, am, right, sa, share) \
960 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
961 (unsigned int)(num), (unsigned int)(am), \
962 (unsigned int)(right), (unsigned int)(am)&(right) )); \
963 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
964 (unsigned int)(num), (unsigned int)(sa), \
965 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
966 if (((am) & (right)) && !((sa) & (share))) { \
967 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
968 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
969 (unsigned int)(share) )); \
970 return True; \
972 #else
973 #define CHECK_MASK(num, am, right, sa, share) \
974 if (((am) & (right)) && !((sa) & (share))) { \
975 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
976 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
977 (unsigned int)(share) )); \
978 return True; \
980 #endif
982 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
983 share_access, FILE_SHARE_WRITE);
984 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
985 entry->share_access, FILE_SHARE_WRITE);
987 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
988 share_access, FILE_SHARE_READ);
989 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
990 entry->share_access, FILE_SHARE_READ);
992 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
993 share_access, FILE_SHARE_DELETE);
994 CHECK_MASK(6, access_mask, DELETE_ACCESS,
995 entry->share_access, FILE_SHARE_DELETE);
997 DEBUG(10,("share_conflict: No conflict.\n"));
998 return False;
1001 #if defined(DEVELOPER)
1002 static void validate_my_share_entries(struct smbd_server_connection *sconn,
1003 int num,
1004 struct share_mode_entry *share_entry)
1006 struct server_id self = messaging_server_id(sconn->msg_ctx);
1007 files_struct *fsp;
1009 if (!serverid_equal(&self, &share_entry->pid)) {
1010 return;
1013 if (is_deferred_open_entry(share_entry) &&
1014 !open_was_deferred(sconn, share_entry->op_mid)) {
1015 char *str = talloc_asprintf(talloc_tos(),
1016 "Got a deferred entry without a request: "
1017 "PANIC: %s\n",
1018 share_mode_str(talloc_tos(), num, share_entry));
1019 smb_panic(str);
1022 if (!is_valid_share_mode_entry(share_entry)) {
1023 return;
1026 fsp = file_find_dif(sconn, share_entry->id,
1027 share_entry->share_file_id);
1028 if (!fsp) {
1029 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1030 share_mode_str(talloc_tos(), num, share_entry) ));
1031 smb_panic("validate_my_share_entries: Cannot match a "
1032 "share entry with an open file\n");
1035 if (is_deferred_open_entry(share_entry)) {
1036 goto panic;
1039 if ((share_entry->op_type == NO_OPLOCK) &&
1040 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
1041 /* Someone has already written to it, but I haven't yet
1042 * noticed */
1043 return;
1046 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
1047 goto panic;
1050 return;
1052 panic:
1054 char *str;
1055 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1056 share_mode_str(talloc_tos(), num, share_entry) ));
1057 str = talloc_asprintf(talloc_tos(),
1058 "validate_my_share_entries: "
1059 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
1060 fsp->fsp_name->base_name,
1061 (unsigned int)fsp->oplock_type,
1062 (unsigned int)share_entry->op_type );
1063 smb_panic(str);
1066 #endif
1068 bool is_stat_open(uint32 access_mask)
1070 const uint32_t stat_open_bits =
1071 (SYNCHRONIZE_ACCESS|
1072 FILE_READ_ATTRIBUTES|
1073 FILE_WRITE_ATTRIBUTES);
1075 return (((access_mask & stat_open_bits) != 0) &&
1076 ((access_mask & ~stat_open_bits) == 0));
1079 /****************************************************************************
1080 Deal with share modes
1081 Invarient: Share mode must be locked on entry and exit.
1082 Returns -1 on error, or number of share modes on success (may be zero).
1083 ****************************************************************************/
1085 static NTSTATUS open_mode_check(connection_struct *conn,
1086 struct share_mode_lock *lck,
1087 uint32_t name_hash,
1088 uint32 access_mask,
1089 uint32 share_access,
1090 uint32 create_options,
1091 bool *file_existed)
1093 int i;
1095 if(lck->data->num_share_modes == 0) {
1096 return NT_STATUS_OK;
1099 /* A delete on close prohibits everything */
1101 if (is_delete_on_close_set(lck, name_hash)) {
1103 * Check the delete on close token
1104 * is valid. It could have been left
1105 * after a server crash.
1107 for(i = 0; i < lck->data->num_share_modes; i++) {
1108 if (!share_mode_stale_pid(lck->data, i)) {
1110 *file_existed = true;
1112 return NT_STATUS_DELETE_PENDING;
1115 return NT_STATUS_OK;
1118 if (is_stat_open(access_mask)) {
1119 /* Stat open that doesn't trigger oplock breaks or share mode
1120 * checks... ! JRA. */
1121 return NT_STATUS_OK;
1125 * Check if the share modes will give us access.
1128 #if defined(DEVELOPER)
1129 for(i = 0; i < lck->data->num_share_modes; i++) {
1130 validate_my_share_entries(conn->sconn, i,
1131 &lck->data->share_modes[i]);
1133 #endif
1135 /* Now we check the share modes, after any oplock breaks. */
1136 for(i = 0; i < lck->data->num_share_modes; i++) {
1138 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1139 continue;
1142 /* someone else has a share lock on it, check to see if we can
1143 * too */
1144 if (share_conflict(&lck->data->share_modes[i],
1145 access_mask, share_access)) {
1147 if (share_mode_stale_pid(lck->data, i)) {
1148 continue;
1151 *file_existed = true;
1153 return NT_STATUS_SHARING_VIOLATION;
1157 if (lck->data->num_share_modes != 0) {
1158 *file_existed = true;
1161 return NT_STATUS_OK;
1165 * Send a break message to the oplock holder and delay the open for
1166 * our client.
1169 static NTSTATUS send_break_message(files_struct *fsp,
1170 struct share_mode_entry *exclusive,
1171 uint64_t mid,
1172 int oplock_request)
1174 NTSTATUS status;
1175 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1177 DEBUG(10, ("Sending break request to PID %s\n",
1178 procid_str_static(&exclusive->pid)));
1179 exclusive->op_mid = mid;
1181 /* Create the message. */
1182 share_mode_entry_to_message(msg, exclusive);
1184 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1185 don't want this set in the share mode struct pointed to by lck. */
1187 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1188 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1189 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1192 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1193 MSG_SMB_BREAK_REQUEST,
1194 (uint8 *)msg,
1195 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1196 if (!NT_STATUS_IS_OK(status)) {
1197 DEBUG(3, ("Could not send oplock break message: %s\n",
1198 nt_errstr(status)));
1201 return status;
1205 * Return share_mode_entry pointers for :
1206 * 1). Batch oplock entry.
1207 * 2). Batch or exclusive oplock entry (may be identical to #1).
1208 * bool have_level2_oplock
1209 * bool have_no_oplock.
1210 * Do internal consistency checks on the share mode for a file.
1213 static void find_oplock_types(files_struct *fsp,
1214 int oplock_request,
1215 const struct share_mode_lock *lck,
1216 struct share_mode_entry **pp_batch,
1217 struct share_mode_entry **pp_ex_or_batch,
1218 bool *got_level2,
1219 bool *got_no_oplock)
1221 int i;
1223 *pp_batch = NULL;
1224 *pp_ex_or_batch = NULL;
1225 *got_level2 = false;
1226 *got_no_oplock = false;
1228 /* Ignore stat or internal opens, as is done in
1229 delay_for_batch_oplocks() and
1230 delay_for_exclusive_oplocks().
1232 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1233 return;
1236 for (i=0; i<lck->data->num_share_modes; i++) {
1237 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1238 continue;
1241 if (lck->data->share_modes[i].op_type == NO_OPLOCK &&
1242 is_stat_open(lck->data->share_modes[i].access_mask)) {
1243 /* We ignore stat opens in the table - they
1244 always have NO_OPLOCK and never get or
1245 cause breaks. JRA. */
1246 continue;
1249 if (BATCH_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1250 /* batch - can only be one. */
1251 if (share_mode_stale_pid(lck->data, i)) {
1252 DEBUG(10, ("Found stale batch oplock\n"));
1253 continue;
1255 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1256 smb_panic("Bad batch oplock entry.");
1258 *pp_batch = &lck->data->share_modes[i];
1261 if (EXCLUSIVE_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1262 if (share_mode_stale_pid(lck->data, i)) {
1263 DEBUG(10, ("Found stale duplicate oplock\n"));
1264 continue;
1266 /* Exclusive or batch - can only be one. */
1267 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1268 smb_panic("Bad exclusive or batch oplock entry.");
1270 *pp_ex_or_batch = &lck->data->share_modes[i];
1273 if (LEVEL_II_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1274 if (*pp_batch || *pp_ex_or_batch) {
1275 if (share_mode_stale_pid(lck->data, i)) {
1276 DEBUG(10, ("Found stale LevelII "
1277 "oplock\n"));
1278 continue;
1280 smb_panic("Bad levelII oplock entry.");
1282 *got_level2 = true;
1285 if (lck->data->share_modes[i].op_type == NO_OPLOCK) {
1286 if (*pp_batch || *pp_ex_or_batch) {
1287 if (share_mode_stale_pid(lck->data, i)) {
1288 DEBUG(10, ("Found stale NO_OPLOCK "
1289 "entry\n"));
1290 continue;
1292 smb_panic("Bad no oplock entry.");
1294 *got_no_oplock = true;
1299 static bool delay_for_batch_oplocks(files_struct *fsp,
1300 uint64_t mid,
1301 int oplock_request,
1302 struct share_mode_entry *batch_entry)
1304 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1305 return false;
1307 if (batch_entry == NULL) {
1308 return false;
1311 if (server_id_is_disconnected(&batch_entry->pid)) {
1313 * TODO: clean up.
1314 * This could be achieved by sending a break message
1315 * to ourselves. Special considerations for files
1316 * with delete_on_close flag set!
1318 * For now we keep it simple and do not
1319 * allow delete on close for durable handles.
1321 return false;
1324 /* Found a batch oplock */
1325 send_break_message(fsp, batch_entry, mid, oplock_request);
1326 return true;
1329 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1330 uint64_t mid,
1331 int oplock_request,
1332 struct share_mode_entry *ex_entry)
1334 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1335 return false;
1337 if (ex_entry == NULL) {
1338 return false;
1341 if (server_id_is_disconnected(&ex_entry->pid)) {
1343 * since only durable handles can get disconnected,
1344 * and we can only get durable handles with batch oplocks,
1345 * this should actually never be reached...
1347 return false;
1350 send_break_message(fsp, ex_entry, mid, oplock_request);
1351 return true;
1354 static bool file_has_brlocks(files_struct *fsp)
1356 struct byte_range_lock *br_lck;
1358 br_lck = brl_get_locks_readonly(fsp);
1359 if (!br_lck)
1360 return false;
1362 return br_lck->num_locks > 0 ? true : false;
1365 static void grant_fsp_oplock_type(files_struct *fsp,
1366 int oplock_request,
1367 bool got_level2_oplock,
1368 bool got_a_none_oplock)
1370 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1371 lp_level2_oplocks(SNUM(fsp->conn));
1373 /* Start by granting what the client asked for,
1374 but ensure no SAMBA_PRIVATE bits can be set. */
1375 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1377 if (oplock_request & INTERNAL_OPEN_ONLY) {
1378 /* No oplocks on internal open. */
1379 fsp->oplock_type = NO_OPLOCK;
1380 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1381 fsp->oplock_type, fsp_str_dbg(fsp)));
1382 return;
1385 if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1386 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1387 fsp_str_dbg(fsp)));
1388 fsp->oplock_type = NO_OPLOCK;
1391 if (is_stat_open(fsp->access_mask)) {
1392 /* Leave the value already set. */
1393 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1394 fsp->oplock_type, fsp_str_dbg(fsp)));
1395 return;
1399 * Match what was requested (fsp->oplock_type) with
1400 * what was found in the existing share modes.
1403 if (got_a_none_oplock) {
1404 fsp->oplock_type = NO_OPLOCK;
1405 } else if (got_level2_oplock) {
1406 if (fsp->oplock_type == NO_OPLOCK ||
1407 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1408 /* Store a level2 oplock, but don't tell the client */
1409 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1410 } else {
1411 fsp->oplock_type = LEVEL_II_OPLOCK;
1413 } else {
1414 /* All share_mode_entries are placeholders or deferred.
1415 * Silently upgrade to fake levelII if the client didn't
1416 * ask for an oplock. */
1417 if (fsp->oplock_type == NO_OPLOCK) {
1418 /* Store a level2 oplock, but don't tell the client */
1419 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1424 * Don't grant level2 to clients that don't want them
1425 * or if we've turned them off.
1427 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1428 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1431 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1432 fsp->oplock_type, fsp_str_dbg(fsp)));
1435 static bool request_timed_out(struct timeval request_time,
1436 struct timeval timeout)
1438 struct timeval now, end_time;
1439 GetTimeOfDay(&now);
1440 end_time = timeval_sum(&request_time, &timeout);
1441 return (timeval_compare(&end_time, &now) < 0);
1444 /****************************************************************************
1445 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1446 ****************************************************************************/
1448 static void defer_open(struct share_mode_lock *lck,
1449 struct timeval request_time,
1450 struct timeval timeout,
1451 struct smb_request *req,
1452 struct deferred_open_record *state)
1454 struct server_id self = messaging_server_id(req->sconn->msg_ctx);
1456 /* Paranoia check */
1458 if (lck) {
1459 int i;
1461 for (i=0; i<lck->data->num_share_modes; i++) {
1462 struct share_mode_entry *e = &lck->data->share_modes[i];
1464 if (is_deferred_open_entry(e) &&
1465 serverid_equal(&self, &e->pid) &&
1466 (e->op_mid == req->mid)) {
1467 DEBUG(0, ("Trying to defer an already deferred "
1468 "request: mid=%llu, exiting\n",
1469 (unsigned long long)req->mid));
1470 TALLOC_FREE(lck);
1471 exit_server("attempt to defer a deferred request");
1476 /* End paranoia check */
1478 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1479 "open entry for mid %llu\n",
1480 (unsigned int)request_time.tv_sec,
1481 (unsigned int)request_time.tv_usec,
1482 (unsigned long long)req->mid));
1484 if (!push_deferred_open_message_smb(req, request_time, timeout,
1485 state->id, (char *)state, sizeof(*state))) {
1486 TALLOC_FREE(lck);
1487 exit_server("push_deferred_open_message_smb failed");
1489 if (lck) {
1490 add_deferred_open(lck, req->mid, request_time, self, state->id);
1495 /****************************************************************************
1496 On overwrite open ensure that the attributes match.
1497 ****************************************************************************/
1499 static bool open_match_attributes(connection_struct *conn,
1500 uint32 old_dos_attr,
1501 uint32 new_dos_attr,
1502 mode_t existing_unx_mode,
1503 mode_t new_unx_mode,
1504 mode_t *returned_unx_mode)
1506 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1508 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1509 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1511 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1512 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1513 *returned_unx_mode = new_unx_mode;
1514 } else {
1515 *returned_unx_mode = (mode_t)0;
1518 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1519 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1520 "returned_unx_mode = 0%o\n",
1521 (unsigned int)old_dos_attr,
1522 (unsigned int)existing_unx_mode,
1523 (unsigned int)new_dos_attr,
1524 (unsigned int)*returned_unx_mode ));
1526 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1527 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1528 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1529 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1530 return False;
1533 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1534 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1535 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1536 return False;
1539 return True;
1542 /****************************************************************************
1543 Special FCB or DOS processing in the case of a sharing violation.
1544 Try and find a duplicated file handle.
1545 ****************************************************************************/
1547 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
1548 connection_struct *conn,
1549 files_struct *fsp_to_dup_into,
1550 const struct smb_filename *smb_fname,
1551 struct file_id id,
1552 uint16 file_pid,
1553 uint64_t vuid,
1554 uint32 access_mask,
1555 uint32 share_access,
1556 uint32 create_options)
1558 files_struct *fsp;
1560 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1561 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1563 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1564 fsp = file_find_di_next(fsp)) {
1566 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1567 "vuid = %llu, file_pid = %u, private_options = 0x%x "
1568 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1569 fsp->fh->fd, (unsigned long long)fsp->vuid,
1570 (unsigned int)fsp->file_pid,
1571 (unsigned int)fsp->fh->private_options,
1572 (unsigned int)fsp->access_mask ));
1574 if (fsp->fh->fd != -1 &&
1575 fsp->vuid == vuid &&
1576 fsp->file_pid == file_pid &&
1577 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1578 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1579 (fsp->access_mask & FILE_WRITE_DATA) &&
1580 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1581 strequal(fsp->fsp_name->stream_name,
1582 smb_fname->stream_name)) {
1583 DEBUG(10,("fcb_or_dos_open: file match\n"));
1584 break;
1588 if (!fsp) {
1589 return NT_STATUS_NOT_FOUND;
1592 /* quite an insane set of semantics ... */
1593 if (is_executable(smb_fname->base_name) &&
1594 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1595 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1596 return NT_STATUS_INVALID_PARAMETER;
1599 /* We need to duplicate this fsp. */
1600 return dup_file_fsp(req, fsp, access_mask, share_access,
1601 create_options, fsp_to_dup_into);
1604 static void schedule_defer_open(struct share_mode_lock *lck,
1605 struct timeval request_time,
1606 struct smb_request *req)
1608 struct deferred_open_record state;
1610 /* This is a relative time, added to the absolute
1611 request_time value to get the absolute timeout time.
1612 Note that if this is the second or greater time we enter
1613 this codepath for this particular request mid then
1614 request_time is left as the absolute time of the *first*
1615 time this request mid was processed. This is what allows
1616 the request to eventually time out. */
1618 struct timeval timeout;
1620 /* Normally the smbd we asked should respond within
1621 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1622 * the client did, give twice the timeout as a safety
1623 * measure here in case the other smbd is stuck
1624 * somewhere else. */
1626 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1628 /* Nothing actually uses state.delayed_for_oplocks
1629 but it's handy to differentiate in debug messages
1630 between a 30 second delay due to oplock break, and
1631 a 1 second delay for share mode conflicts. */
1633 state.delayed_for_oplocks = True;
1634 state.async_open = false;
1635 state.id = lck->data->id;
1637 if (!request_timed_out(request_time, timeout)) {
1638 defer_open(lck, request_time, timeout, req, &state);
1642 /****************************************************************************
1643 Reschedule an open call that went asynchronous.
1644 ****************************************************************************/
1646 static void schedule_async_open(struct timeval request_time,
1647 struct smb_request *req)
1649 struct deferred_open_record state;
1650 struct timeval timeout;
1652 timeout = timeval_set(20, 0);
1654 ZERO_STRUCT(state);
1655 state.delayed_for_oplocks = false;
1656 state.async_open = true;
1658 if (!request_timed_out(request_time, timeout)) {
1659 defer_open(NULL, request_time, timeout, req, &state);
1663 /****************************************************************************
1664 Work out what access_mask to use from what the client sent us.
1665 ****************************************************************************/
1667 static NTSTATUS smbd_calculate_maximum_allowed_access(
1668 connection_struct *conn,
1669 const struct smb_filename *smb_fname,
1670 bool use_privs,
1671 uint32_t *p_access_mask)
1673 struct security_descriptor *sd;
1674 uint32_t access_granted;
1675 NTSTATUS status;
1677 if (!use_privs && (get_current_uid(conn) == (uid_t)0)) {
1678 *p_access_mask |= FILE_GENERIC_ALL;
1679 return NT_STATUS_OK;
1682 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1683 (SECINFO_OWNER |
1684 SECINFO_GROUP |
1685 SECINFO_DACL),&sd);
1687 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1689 * File did not exist
1691 *p_access_mask = FILE_GENERIC_ALL;
1692 return NT_STATUS_OK;
1694 if (!NT_STATUS_IS_OK(status)) {
1695 DEBUG(10,("Could not get acl on file %s: %s\n",
1696 smb_fname_str_dbg(smb_fname),
1697 nt_errstr(status)));
1698 return NT_STATUS_ACCESS_DENIED;
1702 * Never test FILE_READ_ATTRIBUTES. se_file_access_check()
1703 * also takes care of owner WRITE_DAC and READ_CONTROL.
1705 status = se_file_access_check(sd,
1706 get_current_nttok(conn),
1707 use_privs,
1708 (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1709 &access_granted);
1711 TALLOC_FREE(sd);
1713 if (!NT_STATUS_IS_OK(status)) {
1714 DEBUG(10, ("Access denied on file %s: "
1715 "when calculating maximum access\n",
1716 smb_fname_str_dbg(smb_fname)));
1717 return NT_STATUS_ACCESS_DENIED;
1719 *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1721 if (!(access_granted & DELETE_ACCESS)) {
1722 if (can_delete_file_in_directory(conn, smb_fname)) {
1723 *p_access_mask |= DELETE_ACCESS;
1727 return NT_STATUS_OK;
1730 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1731 const struct smb_filename *smb_fname,
1732 bool use_privs,
1733 uint32_t access_mask,
1734 uint32_t *access_mask_out)
1736 NTSTATUS status;
1737 uint32_t orig_access_mask = access_mask;
1738 uint32_t rejected_share_access;
1741 * Convert GENERIC bits to specific bits.
1744 se_map_generic(&access_mask, &file_generic_mapping);
1746 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1747 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1749 status = smbd_calculate_maximum_allowed_access(
1750 conn, smb_fname, use_privs, &access_mask);
1752 if (!NT_STATUS_IS_OK(status)) {
1753 return status;
1756 access_mask &= conn->share_access;
1759 rejected_share_access = access_mask & ~(conn->share_access);
1761 if (rejected_share_access) {
1762 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1763 "file %s: rejected by share access mask[0x%08X] "
1764 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1765 smb_fname_str_dbg(smb_fname),
1766 conn->share_access,
1767 orig_access_mask, access_mask,
1768 rejected_share_access));
1769 return NT_STATUS_ACCESS_DENIED;
1772 *access_mask_out = access_mask;
1773 return NT_STATUS_OK;
1776 /****************************************************************************
1777 Remove the deferred open entry under lock.
1778 ****************************************************************************/
1780 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1781 struct server_id pid)
1783 struct share_mode_lock *lck = get_existing_share_mode_lock(
1784 talloc_tos(), id);
1785 if (lck == NULL) {
1786 DEBUG(0, ("could not get share mode lock\n"));
1787 return;
1789 del_deferred_open_entry(lck, mid, pid);
1790 TALLOC_FREE(lck);
1793 /****************************************************************************
1794 Return true if this is a state pointer to an asynchronous create.
1795 ****************************************************************************/
1797 bool is_deferred_open_async(const void *ptr)
1799 const struct deferred_open_record *state = (const struct deferred_open_record *)ptr;
1801 return state->async_open;
1804 static bool clear_ads(uint32_t create_disposition)
1806 bool ret = false;
1808 switch (create_disposition) {
1809 case FILE_SUPERSEDE:
1810 case FILE_OVERWRITE_IF:
1811 case FILE_OVERWRITE:
1812 ret = true;
1813 break;
1814 default:
1815 break;
1817 return ret;
1820 static int disposition_to_open_flags(uint32_t create_disposition)
1822 int ret = 0;
1825 * Currently we're using FILE_SUPERSEDE as the same as
1826 * FILE_OVERWRITE_IF but they really are
1827 * different. FILE_SUPERSEDE deletes an existing file
1828 * (requiring delete access) then recreates it.
1831 switch (create_disposition) {
1832 case FILE_SUPERSEDE:
1833 case FILE_OVERWRITE_IF:
1835 * If file exists replace/overwrite. If file doesn't
1836 * exist create.
1838 ret = O_CREAT|O_TRUNC;
1839 break;
1841 case FILE_OPEN:
1843 * If file exists open. If file doesn't exist error.
1845 ret = 0;
1846 break;
1848 case FILE_OVERWRITE:
1850 * If file exists overwrite. If file doesn't exist
1851 * error.
1853 ret = O_TRUNC;
1854 break;
1856 case FILE_CREATE:
1858 * If file exists error. If file doesn't exist create.
1860 ret = O_CREAT|O_EXCL;
1861 break;
1863 case FILE_OPEN_IF:
1865 * If file exists open. If file doesn't exist create.
1867 ret = O_CREAT;
1868 break;
1870 return ret;
1873 static int calculate_open_access_flags(uint32_t access_mask,
1874 int oplock_request,
1875 uint32_t private_flags)
1877 bool need_write, need_read;
1880 * Note that we ignore the append flag as append does not
1881 * mean the same thing under DOS and Unix.
1884 need_write =
1885 ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1886 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE));
1888 if (!need_write) {
1889 return O_RDONLY;
1892 /* DENY_DOS opens are always underlying read-write on the
1893 file handle, no matter what the requested access mask
1894 says. */
1896 need_read =
1897 ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1898 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|
1899 FILE_READ_EA|FILE_EXECUTE));
1901 if (!need_read) {
1902 return O_WRONLY;
1904 return O_RDWR;
1907 /****************************************************************************
1908 Open a file with a share mode. Passed in an already created files_struct *.
1909 ****************************************************************************/
1911 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1912 struct smb_request *req,
1913 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1914 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1915 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1916 uint32 create_options, /* options such as delete on close. */
1917 uint32 new_dos_attributes, /* attributes used for new file. */
1918 int oplock_request, /* internal Samba oplock codes. */
1919 /* Information (FILE_EXISTS etc.) */
1920 uint32_t private_flags, /* Samba specific flags. */
1921 int *pinfo,
1922 files_struct *fsp)
1924 struct smb_filename *smb_fname = fsp->fsp_name;
1925 int flags=0;
1926 int flags2=0;
1927 bool file_existed = VALID_STAT(smb_fname->st);
1928 bool def_acl = False;
1929 bool posix_open = False;
1930 bool new_file_created = False;
1931 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1932 mode_t new_unx_mode = (mode_t)0;
1933 mode_t unx_mode = (mode_t)0;
1934 int info;
1935 uint32 existing_dos_attributes = 0;
1936 struct timeval request_time = timeval_zero();
1937 struct share_mode_lock *lck = NULL;
1938 uint32 open_access_mask = access_mask;
1939 NTSTATUS status;
1940 char *parent_dir;
1941 SMB_STRUCT_STAT saved_stat = smb_fname->st;
1943 if (conn->printer) {
1945 * Printers are handled completely differently.
1946 * Most of the passed parameters are ignored.
1949 if (pinfo) {
1950 *pinfo = FILE_WAS_CREATED;
1953 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1954 smb_fname_str_dbg(smb_fname)));
1956 if (!req) {
1957 DEBUG(0,("open_file_ntcreate: printer open without "
1958 "an SMB request!\n"));
1959 return NT_STATUS_INTERNAL_ERROR;
1962 return print_spool_open(fsp, smb_fname->base_name,
1963 req->vuid);
1966 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1967 NULL)) {
1968 return NT_STATUS_NO_MEMORY;
1971 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1972 posix_open = True;
1973 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1974 new_dos_attributes = 0;
1975 } else {
1976 /* Windows allows a new file to be created and
1977 silently removes a FILE_ATTRIBUTE_DIRECTORY
1978 sent by the client. Do the same. */
1980 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1982 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1983 * created new. */
1984 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1985 smb_fname, parent_dir);
1988 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1989 "access_mask=0x%x share_access=0x%x "
1990 "create_disposition = 0x%x create_options=0x%x "
1991 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1992 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1993 access_mask, share_access, create_disposition,
1994 create_options, (unsigned int)unx_mode, oplock_request,
1995 (unsigned int)private_flags));
1997 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1998 DEBUG(0, ("No smb request but not an internal only open!\n"));
1999 return NT_STATUS_INTERNAL_ERROR;
2003 * Only non-internal opens can be deferred at all
2006 if (req) {
2007 void *ptr;
2008 if (get_deferred_open_message_state(req,
2009 &request_time,
2010 &ptr)) {
2011 /* Remember the absolute time of the original
2012 request with this mid. We'll use it later to
2013 see if this has timed out. */
2015 /* If it was an async create retry, the file
2016 didn't exist. */
2018 if (is_deferred_open_async(ptr)) {
2019 SET_STAT_INVALID(smb_fname->st);
2020 file_existed = false;
2021 } else {
2022 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
2023 /* Remove the deferred open entry under lock. */
2024 remove_deferred_open_entry(
2025 state->id, req->mid,
2026 messaging_server_id(req->sconn->msg_ctx));
2029 /* Ensure we don't reprocess this message. */
2030 remove_deferred_open_message_smb(req->sconn, req->mid);
2034 if (!posix_open) {
2035 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
2036 if (file_existed) {
2037 existing_dos_attributes = dos_mode(conn, smb_fname);
2041 /* ignore any oplock requests if oplocks are disabled */
2042 if (!lp_oplocks(SNUM(conn)) ||
2043 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
2044 /* Mask off everything except the private Samba bits. */
2045 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
2048 /* this is for OS/2 long file names - say we don't support them */
2049 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
2050 /* OS/2 Workplace shell fix may be main code stream in a later
2051 * release. */
2052 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
2053 "supported.\n"));
2054 if (use_nt_status()) {
2055 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2057 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
2060 switch( create_disposition ) {
2061 case FILE_OPEN:
2062 /* If file exists open. If file doesn't exist error. */
2063 if (!file_existed) {
2064 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
2065 "requested for file %s and file "
2066 "doesn't exist.\n",
2067 smb_fname_str_dbg(smb_fname)));
2068 errno = ENOENT;
2069 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2071 break;
2073 case FILE_OVERWRITE:
2074 /* If file exists overwrite. If file doesn't exist
2075 * error. */
2076 if (!file_existed) {
2077 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
2078 "requested for file %s and file "
2079 "doesn't exist.\n",
2080 smb_fname_str_dbg(smb_fname) ));
2081 errno = ENOENT;
2082 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2084 break;
2086 case FILE_CREATE:
2087 /* If file exists error. If file doesn't exist
2088 * create. */
2089 if (file_existed) {
2090 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
2091 "requested for file %s and file "
2092 "already exists.\n",
2093 smb_fname_str_dbg(smb_fname)));
2094 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
2095 errno = EISDIR;
2096 } else {
2097 errno = EEXIST;
2099 return map_nt_error_from_unix(errno);
2101 break;
2103 case FILE_SUPERSEDE:
2104 case FILE_OVERWRITE_IF:
2105 case FILE_OPEN_IF:
2106 break;
2107 default:
2108 return NT_STATUS_INVALID_PARAMETER;
2111 flags2 = disposition_to_open_flags(create_disposition);
2113 /* We only care about matching attributes on file exists and
2114 * overwrite. */
2116 if (!posix_open && file_existed &&
2117 ((create_disposition == FILE_OVERWRITE) ||
2118 (create_disposition == FILE_OVERWRITE_IF))) {
2119 if (!open_match_attributes(conn, existing_dos_attributes,
2120 new_dos_attributes,
2121 smb_fname->st.st_ex_mode,
2122 unx_mode, &new_unx_mode)) {
2123 DEBUG(5,("open_file_ntcreate: attributes missmatch "
2124 "for file %s (%x %x) (0%o, 0%o)\n",
2125 smb_fname_str_dbg(smb_fname),
2126 existing_dos_attributes,
2127 new_dos_attributes,
2128 (unsigned int)smb_fname->st.st_ex_mode,
2129 (unsigned int)unx_mode ));
2130 errno = EACCES;
2131 return NT_STATUS_ACCESS_DENIED;
2135 status = smbd_calculate_access_mask(conn, smb_fname,
2136 false,
2137 access_mask,
2138 &access_mask);
2139 if (!NT_STATUS_IS_OK(status)) {
2140 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
2141 "on file %s returned %s\n",
2142 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
2143 return status;
2146 open_access_mask = access_mask;
2148 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
2149 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
2152 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
2153 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
2154 access_mask));
2157 * Note that we ignore the append flag as append does not
2158 * mean the same thing under DOS and Unix.
2161 flags = calculate_open_access_flags(access_mask, oplock_request,
2162 private_flags);
2165 * Currently we only look at FILE_WRITE_THROUGH for create options.
2168 #if defined(O_SYNC)
2169 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
2170 flags2 |= O_SYNC;
2172 #endif /* O_SYNC */
2174 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
2175 flags2 |= O_APPEND;
2178 if (!posix_open && !CAN_WRITE(conn)) {
2180 * We should really return a permission denied error if either
2181 * O_CREAT or O_TRUNC are set, but for compatibility with
2182 * older versions of Samba we just AND them out.
2184 flags2 &= ~(O_CREAT|O_TRUNC);
2188 * Ensure we can't write on a read-only share or file.
2191 if (flags != O_RDONLY && file_existed &&
2192 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
2193 DEBUG(5,("open_file_ntcreate: write access requested for "
2194 "file %s on read only %s\n",
2195 smb_fname_str_dbg(smb_fname),
2196 !CAN_WRITE(conn) ? "share" : "file" ));
2197 errno = EACCES;
2198 return NT_STATUS_ACCESS_DENIED;
2201 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2202 fsp->share_access = share_access;
2203 fsp->fh->private_options = private_flags;
2204 fsp->access_mask = open_access_mask; /* We change this to the
2205 * requested access_mask after
2206 * the open is done. */
2207 fsp->posix_open = posix_open;
2209 /* Ensure no SAMBA_PRIVATE bits can be set. */
2210 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
2212 if (timeval_is_zero(&request_time)) {
2213 request_time = fsp->open_time;
2216 if (file_existed) {
2217 struct share_mode_entry *batch_entry = NULL;
2218 struct share_mode_entry *exclusive_entry = NULL;
2219 bool got_level2_oplock = false;
2220 bool got_a_none_oplock = false;
2221 struct file_id id;
2223 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2224 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2226 lck = get_share_mode_lock(talloc_tos(), id,
2227 conn->connectpath,
2228 smb_fname, &old_write_time);
2229 if (lck == NULL) {
2230 DEBUG(0, ("Could not get share mode lock\n"));
2231 return NT_STATUS_SHARING_VIOLATION;
2234 /* Get the types we need to examine. */
2235 find_oplock_types(fsp,
2236 oplock_request,
2237 lck,
2238 &batch_entry,
2239 &exclusive_entry,
2240 &got_level2_oplock,
2241 &got_a_none_oplock);
2243 /* First pass - send break only on batch oplocks. */
2244 if ((req != NULL) &&
2245 delay_for_batch_oplocks(fsp,
2246 req->mid,
2247 oplock_request,
2248 batch_entry)) {
2249 schedule_defer_open(lck, request_time, req);
2250 TALLOC_FREE(lck);
2251 return NT_STATUS_SHARING_VIOLATION;
2254 /* Use the client requested access mask here, not the one we
2255 * open with. */
2256 status = open_mode_check(conn, lck, fsp->name_hash,
2257 access_mask, share_access,
2258 create_options, &file_existed);
2260 if (NT_STATUS_IS_OK(status)) {
2261 /* We might be going to allow this open. Check oplock
2262 * status again. */
2263 /* Second pass - send break for both batch or
2264 * exclusive oplocks. */
2265 if ((req != NULL) &&
2266 delay_for_exclusive_oplocks(
2267 fsp,
2268 req->mid,
2269 oplock_request,
2270 exclusive_entry)) {
2271 schedule_defer_open(lck, request_time, req);
2272 TALLOC_FREE(lck);
2273 return NT_STATUS_SHARING_VIOLATION;
2277 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2278 /* DELETE_PENDING is not deferred for a second */
2279 TALLOC_FREE(lck);
2280 return status;
2283 grant_fsp_oplock_type(fsp,
2284 oplock_request,
2285 got_level2_oplock,
2286 got_a_none_oplock);
2288 if (!NT_STATUS_IS_OK(status)) {
2289 uint32 can_access_mask;
2290 bool can_access = True;
2292 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2294 /* Check if this can be done with the deny_dos and fcb
2295 * calls. */
2296 if (private_flags &
2297 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2298 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2299 if (req == NULL) {
2300 DEBUG(0, ("DOS open without an SMB "
2301 "request!\n"));
2302 TALLOC_FREE(lck);
2303 return NT_STATUS_INTERNAL_ERROR;
2306 /* Use the client requested access mask here,
2307 * not the one we open with. */
2308 status = fcb_or_dos_open(req,
2309 conn,
2310 fsp,
2311 smb_fname,
2313 req->smbpid,
2314 req->vuid,
2315 access_mask,
2316 share_access,
2317 create_options);
2319 if (NT_STATUS_IS_OK(status)) {
2320 TALLOC_FREE(lck);
2321 if (pinfo) {
2322 *pinfo = FILE_WAS_OPENED;
2324 return NT_STATUS_OK;
2329 * This next line is a subtlety we need for
2330 * MS-Access. If a file open will fail due to share
2331 * permissions and also for security (access) reasons,
2332 * we need to return the access failed error, not the
2333 * share error. We can't open the file due to kernel
2334 * oplock deadlock (it's possible we failed above on
2335 * the open_mode_check()) so use a userspace check.
2338 if (flags & O_RDWR) {
2339 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2340 } else if (flags & O_WRONLY) {
2341 can_access_mask = FILE_WRITE_DATA;
2342 } else {
2343 can_access_mask = FILE_READ_DATA;
2346 if (((can_access_mask & FILE_WRITE_DATA) &&
2347 !CAN_WRITE(conn)) ||
2348 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2349 smb_fname,
2350 false,
2351 can_access_mask))) {
2352 can_access = False;
2356 * If we're returning a share violation, ensure we
2357 * cope with the braindead 1 second delay.
2360 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2361 lp_defer_sharing_violations()) {
2362 struct timeval timeout;
2363 struct deferred_open_record state;
2364 int timeout_usecs;
2366 /* this is a hack to speed up torture tests
2367 in 'make test' */
2368 timeout_usecs = lp_parm_int(SNUM(conn),
2369 "smbd","sharedelay",
2370 SHARING_VIOLATION_USEC_WAIT);
2372 /* This is a relative time, added to the absolute
2373 request_time value to get the absolute timeout time.
2374 Note that if this is the second or greater time we enter
2375 this codepath for this particular request mid then
2376 request_time is left as the absolute time of the *first*
2377 time this request mid was processed. This is what allows
2378 the request to eventually time out. */
2380 timeout = timeval_set(0, timeout_usecs);
2382 /* Nothing actually uses state.delayed_for_oplocks
2383 but it's handy to differentiate in debug messages
2384 between a 30 second delay due to oplock break, and
2385 a 1 second delay for share mode conflicts. */
2387 state.delayed_for_oplocks = False;
2388 state.async_open = false;
2389 state.id = id;
2391 if ((req != NULL)
2392 && !request_timed_out(request_time,
2393 timeout)) {
2394 defer_open(lck, request_time, timeout,
2395 req, &state);
2399 TALLOC_FREE(lck);
2400 if (can_access) {
2402 * We have detected a sharing violation here
2403 * so return the correct error code
2405 status = NT_STATUS_SHARING_VIOLATION;
2406 } else {
2407 status = NT_STATUS_ACCESS_DENIED;
2409 return status;
2413 * We exit this block with the share entry *locked*.....
2417 SMB_ASSERT(!file_existed || (lck != NULL));
2420 * Ensure we pay attention to default ACLs on directories if required.
2423 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2424 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2425 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2428 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2429 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2430 (unsigned int)flags, (unsigned int)flags2,
2431 (unsigned int)unx_mode, (unsigned int)access_mask,
2432 (unsigned int)open_access_mask));
2434 fsp_open = open_file(fsp, conn, req, parent_dir,
2435 flags|flags2, unx_mode, access_mask,
2436 open_access_mask, &new_file_created);
2438 if (!NT_STATUS_IS_OK(fsp_open)) {
2439 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_RETRY)) {
2440 schedule_async_open(request_time, req);
2442 TALLOC_FREE(lck);
2443 return fsp_open;
2446 if (file_existed && !check_same_dev_ino(&saved_stat, &smb_fname->st)) {
2448 * The file did exist, but some other (local or NFS)
2449 * process either renamed/unlinked and re-created the
2450 * file with different dev/ino after we walked the path,
2451 * but before we did the open. We could retry the
2452 * open but it's a rare enough case it's easier to
2453 * just fail the open to prevent creating any problems
2454 * in the open file db having the wrong dev/ino key.
2456 TALLOC_FREE(lck);
2457 fd_close(fsp);
2458 DEBUG(1,("open_file_ntcreate: file %s - dev/ino mismatch. "
2459 "Old (dev=0x%llu, ino =0x%llu). "
2460 "New (dev=0x%llu, ino=0x%llu). Failing open "
2461 " with NT_STATUS_ACCESS_DENIED.\n",
2462 smb_fname_str_dbg(smb_fname),
2463 (unsigned long long)saved_stat.st_ex_dev,
2464 (unsigned long long)saved_stat.st_ex_ino,
2465 (unsigned long long)smb_fname->st.st_ex_dev,
2466 (unsigned long long)smb_fname->st.st_ex_ino));
2467 return NT_STATUS_ACCESS_DENIED;
2470 if (!file_existed) {
2471 struct share_mode_entry *batch_entry = NULL;
2472 struct share_mode_entry *exclusive_entry = NULL;
2473 bool got_level2_oplock = false;
2474 bool got_a_none_oplock = false;
2475 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2476 struct file_id id;
2478 * Deal with the race condition where two smbd's detect the
2479 * file doesn't exist and do the create at the same time. One
2480 * of them will win and set a share mode, the other (ie. this
2481 * one) should check if the requested share mode for this
2482 * create is allowed.
2486 * Now the file exists and fsp is successfully opened,
2487 * fsp->dev and fsp->inode are valid and should replace the
2488 * dev=0,inode=0 from a non existent file. Spotted by
2489 * Nadav Danieli <nadavd@exanet.com>. JRA.
2492 id = fsp->file_id;
2494 lck = get_share_mode_lock(talloc_tos(), id,
2495 conn->connectpath,
2496 smb_fname, &old_write_time);
2498 if (lck == NULL) {
2499 DEBUG(0, ("open_file_ntcreate: Could not get share "
2500 "mode lock for %s\n",
2501 smb_fname_str_dbg(smb_fname)));
2502 fd_close(fsp);
2503 return NT_STATUS_SHARING_VIOLATION;
2506 /* Get the types we need to examine. */
2507 find_oplock_types(fsp,
2508 oplock_request,
2509 lck,
2510 &batch_entry,
2511 &exclusive_entry,
2512 &got_level2_oplock,
2513 &got_a_none_oplock);
2515 /* First pass - send break only on batch oplocks. */
2516 if ((req != NULL) &&
2517 delay_for_batch_oplocks(fsp,
2518 req->mid,
2519 oplock_request,
2520 batch_entry)) {
2521 schedule_defer_open(lck, request_time, req);
2522 TALLOC_FREE(lck);
2523 fd_close(fsp);
2524 return NT_STATUS_SHARING_VIOLATION;
2527 status = open_mode_check(conn, lck, fsp->name_hash,
2528 access_mask, share_access,
2529 create_options, &file_existed);
2531 if (NT_STATUS_IS_OK(status)) {
2532 /* We might be going to allow this open. Check oplock
2533 * status again. */
2534 /* Second pass - send break for both batch or
2535 * exclusive oplocks. */
2536 if ((req != NULL) &&
2537 delay_for_exclusive_oplocks(
2538 fsp,
2539 req->mid,
2540 oplock_request,
2541 exclusive_entry)) {
2542 schedule_defer_open(lck, request_time, req);
2543 TALLOC_FREE(lck);
2544 fd_close(fsp);
2545 return NT_STATUS_SHARING_VIOLATION;
2549 if (!NT_STATUS_IS_OK(status)) {
2550 struct deferred_open_record state;
2552 state.delayed_for_oplocks = False;
2553 state.async_open = false;
2554 state.id = id;
2556 /* Do it all over again immediately. In the second
2557 * round we will find that the file existed and handle
2558 * the DELETE_PENDING and FCB cases correctly. No need
2559 * to duplicate the code here. Essentially this is a
2560 * "goto top of this function", but don't tell
2561 * anybody... */
2563 if (req != NULL) {
2564 defer_open(lck, request_time, timeval_zero(),
2565 req, &state);
2567 TALLOC_FREE(lck);
2568 fd_close(fsp);
2569 return status;
2572 grant_fsp_oplock_type(fsp,
2573 oplock_request,
2574 got_level2_oplock,
2575 got_a_none_oplock);
2578 * We exit this block with the share entry *locked*.....
2583 SMB_ASSERT(lck != NULL);
2585 /* Delete streams if create_disposition requires it */
2586 if (!new_file_created && clear_ads(create_disposition) &&
2587 !is_ntfs_stream_smb_fname(smb_fname)) {
2588 status = delete_all_streams(conn, smb_fname->base_name);
2589 if (!NT_STATUS_IS_OK(status)) {
2590 TALLOC_FREE(lck);
2591 fd_close(fsp);
2592 return status;
2596 /* note that we ignore failure for the following. It is
2597 basically a hack for NFS, and NFS will never set one of
2598 these only read them. Nobody but Samba can ever set a deny
2599 mode and we have already checked our more authoritative
2600 locking database for permission to set this deny mode. If
2601 the kernel refuses the operations then the kernel is wrong.
2602 note that GPFS supports it as well - jmcd */
2604 if (fsp->fh->fd != -1 && lp_kernel_share_modes(SNUM(conn))) {
2605 int ret_flock;
2606 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2607 if(ret_flock == -1 ){
2609 TALLOC_FREE(lck);
2610 fd_close(fsp);
2612 return NT_STATUS_SHARING_VIOLATION;
2617 * At this point onwards, we can guarantee that the share entry
2618 * is locked, whether we created the file or not, and that the
2619 * deny mode is compatible with all current opens.
2623 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2624 * but we don't have to store this - just ignore it on access check.
2626 if (conn->sconn->using_smb2) {
2628 * SMB2 doesn't return it (according to Microsoft tests).
2629 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2630 * File created with access = 0x7 (Read, Write, Delete)
2631 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2633 fsp->access_mask = access_mask;
2634 } else {
2635 /* But SMB1 does. */
2636 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2639 if (file_existed) {
2640 /* stat opens on existing files don't get oplocks. */
2641 if (is_stat_open(open_access_mask)) {
2642 fsp->oplock_type = NO_OPLOCK;
2646 if (new_file_created) {
2647 info = FILE_WAS_CREATED;
2648 } else {
2649 if (flags2 & O_TRUNC) {
2650 info = FILE_WAS_OVERWRITTEN;
2651 } else {
2652 info = FILE_WAS_OPENED;
2656 if (pinfo) {
2657 *pinfo = info;
2661 * Setup the oplock info in both the shared memory and
2662 * file structs.
2665 status = set_file_oplock(fsp, fsp->oplock_type);
2666 if (!NT_STATUS_IS_OK(status)) {
2668 * Could not get the kernel oplock or there are byte-range
2669 * locks on the file.
2671 fsp->oplock_type = NO_OPLOCK;
2674 set_share_mode(lck, fsp, get_current_uid(conn),
2675 req ? req->mid : 0,
2676 fsp->oplock_type);
2678 /* Handle strange delete on close create semantics. */
2679 if (create_options & FILE_DELETE_ON_CLOSE) {
2681 status = can_set_delete_on_close(fsp, new_dos_attributes);
2683 if (!NT_STATUS_IS_OK(status)) {
2684 /* Remember to delete the mode we just added. */
2685 del_share_mode(lck, fsp);
2686 TALLOC_FREE(lck);
2687 fd_close(fsp);
2688 return status;
2690 /* Note that here we set the *inital* delete on close flag,
2691 not the regular one. The magic gets handled in close. */
2692 fsp->initial_delete_on_close = True;
2695 if (info != FILE_WAS_OPENED) {
2696 /* Files should be initially set as archive */
2697 if (lp_map_archive(SNUM(conn)) ||
2698 lp_store_dos_attributes(SNUM(conn))) {
2699 if (!posix_open) {
2700 if (file_set_dosmode(conn, smb_fname,
2701 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2702 parent_dir, true) == 0) {
2703 unx_mode = smb_fname->st.st_ex_mode;
2709 /* Determine sparse flag. */
2710 if (posix_open) {
2711 /* POSIX opens are sparse by default. */
2712 fsp->is_sparse = true;
2713 } else {
2714 fsp->is_sparse = (file_existed &&
2715 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2719 * Take care of inherited ACLs on created files - if default ACL not
2720 * selected.
2723 if (!posix_open && new_file_created && !def_acl) {
2725 int saved_errno = errno; /* We might get ENOSYS in the next
2726 * call.. */
2728 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2729 errno == ENOSYS) {
2730 errno = saved_errno; /* Ignore ENOSYS */
2733 } else if (new_unx_mode) {
2735 int ret = -1;
2737 /* Attributes need changing. File already existed. */
2740 int saved_errno = errno; /* We might get ENOSYS in the
2741 * next call.. */
2742 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2744 if (ret == -1 && errno == ENOSYS) {
2745 errno = saved_errno; /* Ignore ENOSYS */
2746 } else {
2747 DEBUG(5, ("open_file_ntcreate: reset "
2748 "attributes of file %s to 0%o\n",
2749 smb_fname_str_dbg(smb_fname),
2750 (unsigned int)new_unx_mode));
2751 ret = 0; /* Don't do the fchmod below. */
2755 if ((ret == -1) &&
2756 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2757 DEBUG(5, ("open_file_ntcreate: failed to reset "
2758 "attributes of file %s to 0%o\n",
2759 smb_fname_str_dbg(smb_fname),
2760 (unsigned int)new_unx_mode));
2763 /* If this is a successful open, we must remove any deferred open
2764 * records. */
2765 if (req != NULL) {
2766 del_deferred_open_entry(lck, req->mid,
2767 messaging_server_id(req->sconn->msg_ctx));
2769 TALLOC_FREE(lck);
2771 return NT_STATUS_OK;
2775 /****************************************************************************
2776 Open a file for for write to ensure that we can fchmod it.
2777 ****************************************************************************/
2779 NTSTATUS open_file_fchmod(connection_struct *conn,
2780 struct smb_filename *smb_fname,
2781 files_struct **result)
2783 if (!VALID_STAT(smb_fname->st)) {
2784 return NT_STATUS_INVALID_PARAMETER;
2787 return SMB_VFS_CREATE_FILE(
2788 conn, /* conn */
2789 NULL, /* req */
2790 0, /* root_dir_fid */
2791 smb_fname, /* fname */
2792 FILE_WRITE_DATA, /* access_mask */
2793 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2794 FILE_SHARE_DELETE),
2795 FILE_OPEN, /* create_disposition*/
2796 0, /* create_options */
2797 0, /* file_attributes */
2798 INTERNAL_OPEN_ONLY, /* oplock_request */
2799 0, /* allocation_size */
2800 0, /* private_flags */
2801 NULL, /* sd */
2802 NULL, /* ea_list */
2803 result, /* result */
2804 NULL); /* pinfo */
2807 static NTSTATUS mkdir_internal(connection_struct *conn,
2808 struct smb_filename *smb_dname,
2809 uint32 file_attributes)
2811 mode_t mode;
2812 char *parent_dir = NULL;
2813 NTSTATUS status;
2814 bool posix_open = false;
2815 bool need_re_stat = false;
2816 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2818 if (!CAN_WRITE(conn) || (access_mask & ~(conn->share_access))) {
2819 DEBUG(5,("mkdir_internal: failing share access "
2820 "%s\n", lp_servicename(talloc_tos(), SNUM(conn))));
2821 return NT_STATUS_ACCESS_DENIED;
2824 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2825 NULL)) {
2826 return NT_STATUS_NO_MEMORY;
2829 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2830 posix_open = true;
2831 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2832 } else {
2833 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2836 status = check_parent_access(conn,
2837 smb_dname,
2838 access_mask);
2839 if(!NT_STATUS_IS_OK(status)) {
2840 DEBUG(5,("mkdir_internal: check_parent_access "
2841 "on directory %s for path %s returned %s\n",
2842 parent_dir,
2843 smb_dname->base_name,
2844 nt_errstr(status) ));
2845 return status;
2848 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2849 return map_nt_error_from_unix(errno);
2852 /* Ensure we're checking for a symlink here.... */
2853 /* We don't want to get caught by a symlink racer. */
2855 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2856 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2857 smb_fname_str_dbg(smb_dname), strerror(errno)));
2858 return map_nt_error_from_unix(errno);
2861 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2862 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2863 smb_fname_str_dbg(smb_dname)));
2864 return NT_STATUS_NOT_A_DIRECTORY;
2867 if (lp_store_dos_attributes(SNUM(conn))) {
2868 if (!posix_open) {
2869 file_set_dosmode(conn, smb_dname,
2870 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2871 parent_dir, true);
2875 if (lp_inherit_perms(SNUM(conn))) {
2876 inherit_access_posix_acl(conn, parent_dir,
2877 smb_dname->base_name, mode);
2878 need_re_stat = true;
2881 if (!posix_open) {
2883 * Check if high bits should have been set,
2884 * then (if bits are missing): add them.
2885 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2886 * dir.
2888 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2889 (mode & ~smb_dname->st.st_ex_mode)) {
2890 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2891 (smb_dname->st.st_ex_mode |
2892 (mode & ~smb_dname->st.st_ex_mode)));
2893 need_re_stat = true;
2897 /* Change the owner if required. */
2898 if (lp_inherit_owner(SNUM(conn))) {
2899 change_dir_owner_to_parent(conn, parent_dir,
2900 smb_dname->base_name,
2901 &smb_dname->st);
2902 need_re_stat = true;
2905 if (need_re_stat) {
2906 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2907 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2908 smb_fname_str_dbg(smb_dname), strerror(errno)));
2909 return map_nt_error_from_unix(errno);
2913 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2914 smb_dname->base_name);
2916 return NT_STATUS_OK;
2919 /****************************************************************************
2920 Open a directory from an NT SMB call.
2921 ****************************************************************************/
2923 static NTSTATUS open_directory(connection_struct *conn,
2924 struct smb_request *req,
2925 struct smb_filename *smb_dname,
2926 uint32 access_mask,
2927 uint32 share_access,
2928 uint32 create_disposition,
2929 uint32 create_options,
2930 uint32 file_attributes,
2931 int *pinfo,
2932 files_struct **result)
2934 files_struct *fsp = NULL;
2935 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2936 struct share_mode_lock *lck = NULL;
2937 NTSTATUS status;
2938 struct timespec mtimespec;
2939 int info = 0;
2941 if (is_ntfs_stream_smb_fname(smb_dname)) {
2942 DEBUG(2, ("open_directory: %s is a stream name!\n",
2943 smb_fname_str_dbg(smb_dname)));
2944 return NT_STATUS_NOT_A_DIRECTORY;
2947 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2948 /* Ensure we have a directory attribute. */
2949 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2952 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2953 "share_access = 0x%x create_options = 0x%x, "
2954 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2955 smb_fname_str_dbg(smb_dname),
2956 (unsigned int)access_mask,
2957 (unsigned int)share_access,
2958 (unsigned int)create_options,
2959 (unsigned int)create_disposition,
2960 (unsigned int)file_attributes));
2962 status = smbd_calculate_access_mask(conn, smb_dname, false,
2963 access_mask, &access_mask);
2964 if (!NT_STATUS_IS_OK(status)) {
2965 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2966 "on file %s returned %s\n",
2967 smb_fname_str_dbg(smb_dname),
2968 nt_errstr(status)));
2969 return status;
2972 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2973 !security_token_has_privilege(get_current_nttok(conn),
2974 SEC_PRIV_SECURITY)) {
2975 DEBUG(10, ("open_directory: open on %s "
2976 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2977 smb_fname_str_dbg(smb_dname)));
2978 return NT_STATUS_PRIVILEGE_NOT_HELD;
2981 switch( create_disposition ) {
2982 case FILE_OPEN:
2984 if (!dir_existed) {
2985 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2988 info = FILE_WAS_OPENED;
2989 break;
2991 case FILE_CREATE:
2993 /* If directory exists error. If directory doesn't
2994 * exist create. */
2996 if (dir_existed) {
2997 status = NT_STATUS_OBJECT_NAME_COLLISION;
2998 DEBUG(2, ("open_directory: unable to create "
2999 "%s. Error was %s\n",
3000 smb_fname_str_dbg(smb_dname),
3001 nt_errstr(status)));
3002 return status;
3005 status = mkdir_internal(conn, smb_dname,
3006 file_attributes);
3008 if (!NT_STATUS_IS_OK(status)) {
3009 DEBUG(2, ("open_directory: unable to create "
3010 "%s. Error was %s\n",
3011 smb_fname_str_dbg(smb_dname),
3012 nt_errstr(status)));
3013 return status;
3016 info = FILE_WAS_CREATED;
3017 break;
3019 case FILE_OPEN_IF:
3021 * If directory exists open. If directory doesn't
3022 * exist create.
3025 if (dir_existed) {
3026 status = NT_STATUS_OK;
3027 info = FILE_WAS_OPENED;
3028 } else {
3029 status = mkdir_internal(conn, smb_dname,
3030 file_attributes);
3032 if (NT_STATUS_IS_OK(status)) {
3033 info = FILE_WAS_CREATED;
3034 } else {
3035 /* Cope with create race. */
3036 if (!NT_STATUS_EQUAL(status,
3037 NT_STATUS_OBJECT_NAME_COLLISION)) {
3038 DEBUG(2, ("open_directory: unable to create "
3039 "%s. Error was %s\n",
3040 smb_fname_str_dbg(smb_dname),
3041 nt_errstr(status)));
3042 return status;
3044 info = FILE_WAS_OPENED;
3048 break;
3050 case FILE_SUPERSEDE:
3051 case FILE_OVERWRITE:
3052 case FILE_OVERWRITE_IF:
3053 default:
3054 DEBUG(5,("open_directory: invalid create_disposition "
3055 "0x%x for directory %s\n",
3056 (unsigned int)create_disposition,
3057 smb_fname_str_dbg(smb_dname)));
3058 return NT_STATUS_INVALID_PARAMETER;
3061 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
3062 DEBUG(5,("open_directory: %s is not a directory !\n",
3063 smb_fname_str_dbg(smb_dname)));
3064 return NT_STATUS_NOT_A_DIRECTORY;
3067 if (info == FILE_WAS_OPENED) {
3068 status = smbd_check_access_rights(conn,
3069 smb_dname,
3070 false,
3071 access_mask);
3072 if (!NT_STATUS_IS_OK(status)) {
3073 DEBUG(10, ("open_directory: smbd_check_access_rights on "
3074 "file %s failed with %s\n",
3075 smb_fname_str_dbg(smb_dname),
3076 nt_errstr(status)));
3077 return status;
3081 status = file_new(req, conn, &fsp);
3082 if(!NT_STATUS_IS_OK(status)) {
3083 return status;
3087 * Setup the files_struct for it.
3090 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
3091 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
3092 fsp->file_pid = req ? req->smbpid : 0;
3093 fsp->can_lock = False;
3094 fsp->can_read = False;
3095 fsp->can_write = False;
3097 fsp->share_access = share_access;
3098 fsp->fh->private_options = 0;
3100 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
3102 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3103 fsp->print_file = NULL;
3104 fsp->modified = False;
3105 fsp->oplock_type = NO_OPLOCK;
3106 fsp->sent_oplock_break = NO_BREAK_SENT;
3107 fsp->is_directory = True;
3108 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
3109 status = fsp_set_smb_fname(fsp, smb_dname);
3110 if (!NT_STATUS_IS_OK(status)) {
3111 file_free(req, fsp);
3112 return status;
3115 mtimespec = smb_dname->st.st_ex_mtime;
3117 #ifdef O_DIRECTORY
3118 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
3119 #else
3120 /* POSIX allows us to open a directory with O_RDONLY. */
3121 status = fd_open(conn, fsp, O_RDONLY, 0);
3122 #endif
3123 if (!NT_STATUS_IS_OK(status)) {
3124 DEBUG(5, ("open_directory: Could not open fd for "
3125 "%s (%s)\n",
3126 smb_fname_str_dbg(smb_dname),
3127 nt_errstr(status)));
3128 file_free(req, fsp);
3129 return status;
3132 status = vfs_stat_fsp(fsp);
3133 if (!NT_STATUS_IS_OK(status)) {
3134 fd_close(fsp);
3135 file_free(req, fsp);
3136 return status;
3139 /* Ensure there was no race condition. */
3140 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
3141 DEBUG(5,("open_directory: stat struct differs for "
3142 "directory %s.\n",
3143 smb_fname_str_dbg(smb_dname)));
3144 fd_close(fsp);
3145 file_free(req, fsp);
3146 return NT_STATUS_ACCESS_DENIED;
3149 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
3150 conn->connectpath, smb_dname,
3151 &mtimespec);
3153 if (lck == NULL) {
3154 DEBUG(0, ("open_directory: Could not get share mode lock for "
3155 "%s\n", smb_fname_str_dbg(smb_dname)));
3156 fd_close(fsp);
3157 file_free(req, fsp);
3158 return NT_STATUS_SHARING_VIOLATION;
3161 status = open_mode_check(conn, lck, fsp->name_hash,
3162 access_mask, share_access,
3163 create_options, &dir_existed);
3165 if (!NT_STATUS_IS_OK(status)) {
3166 TALLOC_FREE(lck);
3167 fd_close(fsp);
3168 file_free(req, fsp);
3169 return status;
3172 set_share_mode(lck, fsp, get_current_uid(conn),
3173 req ? req->mid : 0, NO_OPLOCK);
3175 /* For directories the delete on close bit at open time seems
3176 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
3177 if (create_options & FILE_DELETE_ON_CLOSE) {
3178 status = can_set_delete_on_close(fsp, 0);
3179 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
3180 TALLOC_FREE(lck);
3181 fd_close(fsp);
3182 file_free(req, fsp);
3183 return status;
3186 if (NT_STATUS_IS_OK(status)) {
3187 /* Note that here we set the *inital* delete on close flag,
3188 not the regular one. The magic gets handled in close. */
3189 fsp->initial_delete_on_close = True;
3193 TALLOC_FREE(lck);
3195 if (pinfo) {
3196 *pinfo = info;
3199 *result = fsp;
3200 return NT_STATUS_OK;
3203 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
3204 struct smb_filename *smb_dname)
3206 NTSTATUS status;
3207 files_struct *fsp;
3209 status = SMB_VFS_CREATE_FILE(
3210 conn, /* conn */
3211 req, /* req */
3212 0, /* root_dir_fid */
3213 smb_dname, /* fname */
3214 FILE_READ_ATTRIBUTES, /* access_mask */
3215 FILE_SHARE_NONE, /* share_access */
3216 FILE_CREATE, /* create_disposition*/
3217 FILE_DIRECTORY_FILE, /* create_options */
3218 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
3219 0, /* oplock_request */
3220 0, /* allocation_size */
3221 0, /* private_flags */
3222 NULL, /* sd */
3223 NULL, /* ea_list */
3224 &fsp, /* result */
3225 NULL); /* pinfo */
3227 if (NT_STATUS_IS_OK(status)) {
3228 close_file(req, fsp, NORMAL_CLOSE);
3231 return status;
3234 /****************************************************************************
3235 Receive notification that one of our open files has been renamed by another
3236 smbd process.
3237 ****************************************************************************/
3239 void msg_file_was_renamed(struct messaging_context *msg,
3240 void *private_data,
3241 uint32_t msg_type,
3242 struct server_id server_id,
3243 DATA_BLOB *data)
3245 files_struct *fsp;
3246 char *frm = (char *)data->data;
3247 struct file_id id;
3248 const char *sharepath;
3249 const char *base_name;
3250 const char *stream_name;
3251 struct smb_filename *smb_fname = NULL;
3252 size_t sp_len, bn_len;
3253 NTSTATUS status;
3254 struct smbd_server_connection *sconn =
3255 talloc_get_type_abort(private_data,
3256 struct smbd_server_connection);
3258 if (data->data == NULL
3259 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3260 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3261 (int)data->length));
3262 return;
3265 /* Unpack the message. */
3266 pull_file_id_24(frm, &id);
3267 sharepath = &frm[24];
3268 sp_len = strlen(sharepath);
3269 base_name = sharepath + sp_len + 1;
3270 bn_len = strlen(base_name);
3271 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3273 /* stream_name must always be NULL if there is no stream. */
3274 if (stream_name[0] == '\0') {
3275 stream_name = NULL;
3278 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3279 stream_name, NULL, &smb_fname);
3280 if (!NT_STATUS_IS_OK(status)) {
3281 return;
3284 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3285 "file_id %s\n",
3286 sharepath, smb_fname_str_dbg(smb_fname),
3287 file_id_string_tos(&id)));
3289 for(fsp = file_find_di_first(sconn, id); fsp;
3290 fsp = file_find_di_next(fsp)) {
3291 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3293 DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
3294 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
3295 smb_fname_str_dbg(smb_fname)));
3296 status = fsp_set_smb_fname(fsp, smb_fname);
3297 if (!NT_STATUS_IS_OK(status)) {
3298 goto out;
3300 } else {
3301 /* TODO. JRA. */
3302 /* Now we have the complete path we can work out if this is
3303 actually within this share and adjust newname accordingly. */
3304 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3305 "not sharepath %s) "
3306 "%s from %s -> %s\n",
3307 fsp->conn->connectpath,
3308 sharepath,
3309 fsp_fnum_dbg(fsp),
3310 fsp_str_dbg(fsp),
3311 smb_fname_str_dbg(smb_fname)));
3314 out:
3315 TALLOC_FREE(smb_fname);
3316 return;
3320 * If a main file is opened for delete, all streams need to be checked for
3321 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3322 * If that works, delete them all by setting the delete on close and close.
3325 NTSTATUS open_streams_for_delete(connection_struct *conn,
3326 const char *fname)
3328 struct stream_struct *stream_info = NULL;
3329 files_struct **streams = NULL;
3330 int i;
3331 unsigned int num_streams = 0;
3332 TALLOC_CTX *frame = talloc_stackframe();
3333 NTSTATUS status;
3335 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3336 &num_streams, &stream_info);
3338 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3339 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3340 DEBUG(10, ("no streams around\n"));
3341 TALLOC_FREE(frame);
3342 return NT_STATUS_OK;
3345 if (!NT_STATUS_IS_OK(status)) {
3346 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3347 nt_errstr(status)));
3348 goto fail;
3351 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3352 num_streams));
3354 if (num_streams == 0) {
3355 TALLOC_FREE(frame);
3356 return NT_STATUS_OK;
3359 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3360 if (streams == NULL) {
3361 DEBUG(0, ("talloc failed\n"));
3362 status = NT_STATUS_NO_MEMORY;
3363 goto fail;
3366 for (i=0; i<num_streams; i++) {
3367 struct smb_filename *smb_fname = NULL;
3369 if (strequal(stream_info[i].name, "::$DATA")) {
3370 streams[i] = NULL;
3371 continue;
3374 status = create_synthetic_smb_fname(talloc_tos(), fname,
3375 stream_info[i].name,
3376 NULL, &smb_fname);
3377 if (!NT_STATUS_IS_OK(status)) {
3378 goto fail;
3381 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3382 DEBUG(10, ("Unable to stat stream: %s\n",
3383 smb_fname_str_dbg(smb_fname)));
3386 status = SMB_VFS_CREATE_FILE(
3387 conn, /* conn */
3388 NULL, /* req */
3389 0, /* root_dir_fid */
3390 smb_fname, /* fname */
3391 DELETE_ACCESS, /* access_mask */
3392 (FILE_SHARE_READ | /* share_access */
3393 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3394 FILE_OPEN, /* create_disposition*/
3395 0, /* create_options */
3396 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3397 0, /* oplock_request */
3398 0, /* allocation_size */
3399 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3400 NULL, /* sd */
3401 NULL, /* ea_list */
3402 &streams[i], /* result */
3403 NULL); /* pinfo */
3405 if (!NT_STATUS_IS_OK(status)) {
3406 DEBUG(10, ("Could not open stream %s: %s\n",
3407 smb_fname_str_dbg(smb_fname),
3408 nt_errstr(status)));
3410 TALLOC_FREE(smb_fname);
3411 break;
3413 TALLOC_FREE(smb_fname);
3417 * don't touch the variable "status" beyond this point :-)
3420 for (i -= 1 ; i >= 0; i--) {
3421 if (streams[i] == NULL) {
3422 continue;
3425 DEBUG(10, ("Closing stream # %d, %s\n", i,
3426 fsp_str_dbg(streams[i])));
3427 close_file(NULL, streams[i], NORMAL_CLOSE);
3430 fail:
3431 TALLOC_FREE(frame);
3432 return status;
3435 /*********************************************************************
3436 Create a default ACL by inheriting from the parent. If no inheritance
3437 from the parent available, don't set anything. This will leave the actual
3438 permissions the new file or directory already got from the filesystem
3439 as the NT ACL when read.
3440 *********************************************************************/
3442 static NTSTATUS inherit_new_acl(files_struct *fsp)
3444 TALLOC_CTX *ctx = talloc_tos();
3445 char *parent_name = NULL;
3446 struct security_descriptor *parent_desc = NULL;
3447 NTSTATUS status = NT_STATUS_OK;
3448 struct security_descriptor *psd = NULL;
3449 struct dom_sid *owner_sid = NULL;
3450 struct dom_sid *group_sid = NULL;
3451 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3452 bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3453 bool inheritable_components = false;
3454 size_t size = 0;
3456 if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3457 return NT_STATUS_NO_MEMORY;
3460 status = SMB_VFS_GET_NT_ACL(fsp->conn,
3461 parent_name,
3462 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3463 &parent_desc);
3464 if (!NT_STATUS_IS_OK(status)) {
3465 return status;
3468 inheritable_components = sd_has_inheritable_components(parent_desc,
3469 fsp->is_directory);
3471 if (!inheritable_components && !inherit_owner) {
3472 /* Nothing to inherit and not setting owner. */
3473 return NT_STATUS_OK;
3476 /* Create an inherited descriptor from the parent. */
3478 if (DEBUGLEVEL >= 10) {
3479 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3480 fsp_str_dbg(fsp) ));
3481 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3484 /* Inherit from parent descriptor if "inherit owner" set. */
3485 if (inherit_owner) {
3486 owner_sid = parent_desc->owner_sid;
3487 group_sid = parent_desc->group_sid;
3490 if (owner_sid == NULL) {
3491 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3493 if (group_sid == NULL) {
3494 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3497 status = se_create_child_secdesc(ctx,
3498 &psd,
3499 &size,
3500 parent_desc,
3501 owner_sid,
3502 group_sid,
3503 fsp->is_directory);
3504 if (!NT_STATUS_IS_OK(status)) {
3505 return status;
3508 /* If inheritable_components == false,
3509 se_create_child_secdesc()
3510 creates a security desriptor with a NULL dacl
3511 entry, but with SEC_DESC_DACL_PRESENT. We need
3512 to remove that flag. */
3514 if (!inheritable_components) {
3515 security_info_sent &= ~SECINFO_DACL;
3516 psd->type &= ~SEC_DESC_DACL_PRESENT;
3519 if (DEBUGLEVEL >= 10) {
3520 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3521 fsp_str_dbg(fsp) ));
3522 NDR_PRINT_DEBUG(security_descriptor, psd);
3525 if (inherit_owner) {
3526 /* We need to be root to force this. */
3527 become_root();
3529 status = SMB_VFS_FSET_NT_ACL(fsp,
3530 security_info_sent,
3531 psd);
3532 if (inherit_owner) {
3533 unbecome_root();
3535 return status;
3539 * Wrapper around open_file_ntcreate and open_directory
3542 static NTSTATUS create_file_unixpath(connection_struct *conn,
3543 struct smb_request *req,
3544 struct smb_filename *smb_fname,
3545 uint32_t access_mask,
3546 uint32_t share_access,
3547 uint32_t create_disposition,
3548 uint32_t create_options,
3549 uint32_t file_attributes,
3550 uint32_t oplock_request,
3551 uint64_t allocation_size,
3552 uint32_t private_flags,
3553 struct security_descriptor *sd,
3554 struct ea_list *ea_list,
3556 files_struct **result,
3557 int *pinfo)
3559 int info = FILE_WAS_OPENED;
3560 files_struct *base_fsp = NULL;
3561 files_struct *fsp = NULL;
3562 NTSTATUS status;
3564 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3565 "file_attributes = 0x%x, share_access = 0x%x, "
3566 "create_disposition = 0x%x create_options = 0x%x "
3567 "oplock_request = 0x%x private_flags = 0x%x "
3568 "ea_list = 0x%p, sd = 0x%p, "
3569 "fname = %s\n",
3570 (unsigned int)access_mask,
3571 (unsigned int)file_attributes,
3572 (unsigned int)share_access,
3573 (unsigned int)create_disposition,
3574 (unsigned int)create_options,
3575 (unsigned int)oplock_request,
3576 (unsigned int)private_flags,
3577 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3579 if (create_options & FILE_OPEN_BY_FILE_ID) {
3580 status = NT_STATUS_NOT_SUPPORTED;
3581 goto fail;
3584 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3585 status = NT_STATUS_INVALID_PARAMETER;
3586 goto fail;
3589 if (req == NULL) {
3590 oplock_request |= INTERNAL_OPEN_ONLY;
3593 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3594 && (access_mask & DELETE_ACCESS)
3595 && !is_ntfs_stream_smb_fname(smb_fname)) {
3597 * We can't open a file with DELETE access if any of the
3598 * streams is open without FILE_SHARE_DELETE
3600 status = open_streams_for_delete(conn, smb_fname->base_name);
3602 if (!NT_STATUS_IS_OK(status)) {
3603 goto fail;
3607 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3608 !security_token_has_privilege(get_current_nttok(conn),
3609 SEC_PRIV_SECURITY)) {
3610 DEBUG(10, ("create_file_unixpath: open on %s "
3611 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3612 smb_fname_str_dbg(smb_fname)));
3613 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3614 goto fail;
3617 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3618 && is_ntfs_stream_smb_fname(smb_fname)
3619 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3620 uint32 base_create_disposition;
3621 struct smb_filename *smb_fname_base = NULL;
3623 if (create_options & FILE_DIRECTORY_FILE) {
3624 status = NT_STATUS_NOT_A_DIRECTORY;
3625 goto fail;
3628 switch (create_disposition) {
3629 case FILE_OPEN:
3630 base_create_disposition = FILE_OPEN;
3631 break;
3632 default:
3633 base_create_disposition = FILE_OPEN_IF;
3634 break;
3637 /* Create an smb_filename with stream_name == NULL. */
3638 status = create_synthetic_smb_fname(talloc_tos(),
3639 smb_fname->base_name,
3640 NULL, NULL,
3641 &smb_fname_base);
3642 if (!NT_STATUS_IS_OK(status)) {
3643 goto fail;
3646 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3647 DEBUG(10, ("Unable to stat stream: %s\n",
3648 smb_fname_str_dbg(smb_fname_base)));
3651 /* Open the base file. */
3652 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3653 FILE_SHARE_READ
3654 | FILE_SHARE_WRITE
3655 | FILE_SHARE_DELETE,
3656 base_create_disposition,
3657 0, 0, 0, 0, 0, NULL, NULL,
3658 &base_fsp, NULL);
3659 TALLOC_FREE(smb_fname_base);
3661 if (!NT_STATUS_IS_OK(status)) {
3662 DEBUG(10, ("create_file_unixpath for base %s failed: "
3663 "%s\n", smb_fname->base_name,
3664 nt_errstr(status)));
3665 goto fail;
3667 /* we don't need to low level fd */
3668 fd_close(base_fsp);
3672 * If it's a request for a directory open, deal with it separately.
3675 if (create_options & FILE_DIRECTORY_FILE) {
3677 if (create_options & FILE_NON_DIRECTORY_FILE) {
3678 status = NT_STATUS_INVALID_PARAMETER;
3679 goto fail;
3682 /* Can't open a temp directory. IFS kit test. */
3683 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3684 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3685 status = NT_STATUS_INVALID_PARAMETER;
3686 goto fail;
3690 * We will get a create directory here if the Win32
3691 * app specified a security descriptor in the
3692 * CreateDirectory() call.
3695 oplock_request = 0;
3696 status = open_directory(
3697 conn, req, smb_fname, access_mask, share_access,
3698 create_disposition, create_options, file_attributes,
3699 &info, &fsp);
3700 } else {
3703 * Ordinary file case.
3706 status = file_new(req, conn, &fsp);
3707 if(!NT_STATUS_IS_OK(status)) {
3708 goto fail;
3711 status = fsp_set_smb_fname(fsp, smb_fname);
3712 if (!NT_STATUS_IS_OK(status)) {
3713 goto fail;
3716 if (base_fsp) {
3718 * We're opening the stream element of a
3719 * base_fsp we already opened. Set up the
3720 * base_fsp pointer.
3722 fsp->base_fsp = base_fsp;
3725 if (allocation_size) {
3726 fsp->initial_allocation_size = smb_roundup(fsp->conn,
3727 allocation_size);
3730 status = open_file_ntcreate(conn,
3731 req,
3732 access_mask,
3733 share_access,
3734 create_disposition,
3735 create_options,
3736 file_attributes,
3737 oplock_request,
3738 private_flags,
3739 &info,
3740 fsp);
3742 if(!NT_STATUS_IS_OK(status)) {
3743 file_free(req, fsp);
3744 fsp = NULL;
3747 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3749 /* A stream open never opens a directory */
3751 if (base_fsp) {
3752 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3753 goto fail;
3757 * Fail the open if it was explicitly a non-directory
3758 * file.
3761 if (create_options & FILE_NON_DIRECTORY_FILE) {
3762 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3763 goto fail;
3766 oplock_request = 0;
3767 status = open_directory(
3768 conn, req, smb_fname, access_mask,
3769 share_access, create_disposition,
3770 create_options, file_attributes,
3771 &info, &fsp);
3775 if (!NT_STATUS_IS_OK(status)) {
3776 goto fail;
3779 fsp->base_fsp = base_fsp;
3781 if ((ea_list != NULL) &&
3782 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3783 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3784 if (!NT_STATUS_IS_OK(status)) {
3785 goto fail;
3789 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3790 status = NT_STATUS_ACCESS_DENIED;
3791 goto fail;
3794 /* Save the requested allocation size. */
3795 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3796 if (allocation_size
3797 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3798 fsp->initial_allocation_size = smb_roundup(
3799 fsp->conn, allocation_size);
3800 if (fsp->is_directory) {
3801 /* Can't set allocation size on a directory. */
3802 status = NT_STATUS_ACCESS_DENIED;
3803 goto fail;
3805 if (vfs_allocate_file_space(
3806 fsp, fsp->initial_allocation_size) == -1) {
3807 status = NT_STATUS_DISK_FULL;
3808 goto fail;
3810 } else {
3811 fsp->initial_allocation_size = smb_roundup(
3812 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3814 } else {
3815 fsp->initial_allocation_size = 0;
3818 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3819 fsp->base_fsp == NULL) {
3820 if (sd != NULL) {
3822 * According to the MS documentation, the only time the security
3823 * descriptor is applied to the opened file is iff we *created* the
3824 * file; an existing file stays the same.
3826 * Also, it seems (from observation) that you can open the file with
3827 * any access mask but you can still write the sd. We need to override
3828 * the granted access before we call set_sd
3829 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3832 uint32_t sec_info_sent;
3833 uint32_t saved_access_mask = fsp->access_mask;
3835 sec_info_sent = get_sec_info(sd);
3837 fsp->access_mask = FILE_GENERIC_ALL;
3839 if (sec_info_sent & (SECINFO_OWNER|
3840 SECINFO_GROUP|
3841 SECINFO_DACL|
3842 SECINFO_SACL)) {
3843 status = set_sd(fsp, sd, sec_info_sent);
3846 fsp->access_mask = saved_access_mask;
3848 if (!NT_STATUS_IS_OK(status)) {
3849 goto fail;
3851 } else if (lp_inherit_acls(SNUM(conn))) {
3852 /* Inherit from parent. Errors here are not fatal. */
3853 status = inherit_new_acl(fsp);
3854 if (!NT_STATUS_IS_OK(status)) {
3855 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3856 fsp_str_dbg(fsp),
3857 nt_errstr(status) ));
3862 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3864 *result = fsp;
3865 if (pinfo != NULL) {
3866 *pinfo = info;
3869 smb_fname->st = fsp->fsp_name->st;
3871 return NT_STATUS_OK;
3873 fail:
3874 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3876 if (fsp != NULL) {
3877 if (base_fsp && fsp->base_fsp == base_fsp) {
3879 * The close_file below will close
3880 * fsp->base_fsp.
3882 base_fsp = NULL;
3884 close_file(req, fsp, ERROR_CLOSE);
3885 fsp = NULL;
3887 if (base_fsp != NULL) {
3888 close_file(req, base_fsp, ERROR_CLOSE);
3889 base_fsp = NULL;
3891 return status;
3895 * Calculate the full path name given a relative fid.
3897 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3898 struct smb_request *req,
3899 uint16_t root_dir_fid,
3900 const struct smb_filename *smb_fname,
3901 struct smb_filename **smb_fname_out)
3903 files_struct *dir_fsp;
3904 char *parent_fname = NULL;
3905 char *new_base_name = NULL;
3906 NTSTATUS status;
3908 if (root_dir_fid == 0 || !smb_fname) {
3909 status = NT_STATUS_INTERNAL_ERROR;
3910 goto out;
3913 dir_fsp = file_fsp(req, root_dir_fid);
3915 if (dir_fsp == NULL) {
3916 status = NT_STATUS_INVALID_HANDLE;
3917 goto out;
3920 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3921 status = NT_STATUS_INVALID_HANDLE;
3922 goto out;
3925 if (!dir_fsp->is_directory) {
3928 * Check to see if this is a mac fork of some kind.
3931 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3932 is_ntfs_stream_smb_fname(smb_fname)) {
3933 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3934 goto out;
3938 we need to handle the case when we get a
3939 relative open relative to a file and the
3940 pathname is blank - this is a reopen!
3941 (hint from demyn plantenberg)
3944 status = NT_STATUS_INVALID_HANDLE;
3945 goto out;
3948 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3950 * We're at the toplevel dir, the final file name
3951 * must not contain ./, as this is filtered out
3952 * normally by srvstr_get_path and unix_convert
3953 * explicitly rejects paths containing ./.
3955 parent_fname = talloc_strdup(talloc_tos(), "");
3956 if (parent_fname == NULL) {
3957 status = NT_STATUS_NO_MEMORY;
3958 goto out;
3960 } else {
3961 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3964 * Copy in the base directory name.
3967 parent_fname = talloc_array(talloc_tos(), char,
3968 dir_name_len+2);
3969 if (parent_fname == NULL) {
3970 status = NT_STATUS_NO_MEMORY;
3971 goto out;
3973 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3974 dir_name_len+1);
3977 * Ensure it ends in a '/'.
3978 * We used TALLOC_SIZE +2 to add space for the '/'.
3981 if(dir_name_len
3982 && (parent_fname[dir_name_len-1] != '\\')
3983 && (parent_fname[dir_name_len-1] != '/')) {
3984 parent_fname[dir_name_len] = '/';
3985 parent_fname[dir_name_len+1] = '\0';
3989 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3990 smb_fname->base_name);
3991 if (new_base_name == NULL) {
3992 status = NT_STATUS_NO_MEMORY;
3993 goto out;
3996 status = filename_convert(req,
3997 conn,
3998 req->flags2 & FLAGS2_DFS_PATHNAMES,
3999 new_base_name,
4001 NULL,
4002 smb_fname_out);
4003 if (!NT_STATUS_IS_OK(status)) {
4004 goto out;
4007 out:
4008 TALLOC_FREE(parent_fname);
4009 TALLOC_FREE(new_base_name);
4010 return status;
4013 NTSTATUS create_file_default(connection_struct *conn,
4014 struct smb_request *req,
4015 uint16_t root_dir_fid,
4016 struct smb_filename *smb_fname,
4017 uint32_t access_mask,
4018 uint32_t share_access,
4019 uint32_t create_disposition,
4020 uint32_t create_options,
4021 uint32_t file_attributes,
4022 uint32_t oplock_request,
4023 uint64_t allocation_size,
4024 uint32_t private_flags,
4025 struct security_descriptor *sd,
4026 struct ea_list *ea_list,
4027 files_struct **result,
4028 int *pinfo)
4030 int info = FILE_WAS_OPENED;
4031 files_struct *fsp = NULL;
4032 NTSTATUS status;
4033 bool stream_name = false;
4035 DEBUG(10,("create_file: access_mask = 0x%x "
4036 "file_attributes = 0x%x, share_access = 0x%x, "
4037 "create_disposition = 0x%x create_options = 0x%x "
4038 "oplock_request = 0x%x "
4039 "private_flags = 0x%x "
4040 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
4041 "fname = %s\n",
4042 (unsigned int)access_mask,
4043 (unsigned int)file_attributes,
4044 (unsigned int)share_access,
4045 (unsigned int)create_disposition,
4046 (unsigned int)create_options,
4047 (unsigned int)oplock_request,
4048 (unsigned int)private_flags,
4049 (unsigned int)root_dir_fid,
4050 ea_list, sd, smb_fname_str_dbg(smb_fname)));
4053 * Calculate the filename from the root_dir_if if necessary.
4056 if (root_dir_fid != 0) {
4057 struct smb_filename *smb_fname_out = NULL;
4058 status = get_relative_fid_filename(conn, req, root_dir_fid,
4059 smb_fname, &smb_fname_out);
4060 if (!NT_STATUS_IS_OK(status)) {
4061 goto fail;
4063 smb_fname = smb_fname_out;
4067 * Check to see if this is a mac fork of some kind.
4070 stream_name = is_ntfs_stream_smb_fname(smb_fname);
4071 if (stream_name) {
4072 enum FAKE_FILE_TYPE fake_file_type;
4074 fake_file_type = is_fake_file(smb_fname);
4076 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
4079 * Here we go! support for changing the disk quotas
4080 * --metze
4082 * We need to fake up to open this MAGIC QUOTA file
4083 * and return a valid FID.
4085 * w2k close this file directly after openening xp
4086 * also tries a QUERY_FILE_INFO on the file and then
4087 * close it
4089 status = open_fake_file(req, conn, req->vuid,
4090 fake_file_type, smb_fname,
4091 access_mask, &fsp);
4092 if (!NT_STATUS_IS_OK(status)) {
4093 goto fail;
4096 ZERO_STRUCT(smb_fname->st);
4097 goto done;
4100 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
4101 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
4102 goto fail;
4106 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
4107 int ret;
4108 smb_fname->stream_name = NULL;
4109 /* We have to handle this error here. */
4110 if (create_options & FILE_DIRECTORY_FILE) {
4111 status = NT_STATUS_NOT_A_DIRECTORY;
4112 goto fail;
4114 if (lp_posix_pathnames()) {
4115 ret = SMB_VFS_LSTAT(conn, smb_fname);
4116 } else {
4117 ret = SMB_VFS_STAT(conn, smb_fname);
4120 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
4121 status = NT_STATUS_FILE_IS_A_DIRECTORY;
4122 goto fail;
4126 status = create_file_unixpath(
4127 conn, req, smb_fname, access_mask, share_access,
4128 create_disposition, create_options, file_attributes,
4129 oplock_request, allocation_size, private_flags,
4130 sd, ea_list,
4131 &fsp, &info);
4133 if (!NT_STATUS_IS_OK(status)) {
4134 goto fail;
4137 done:
4138 DEBUG(10, ("create_file: info=%d\n", info));
4140 *result = fsp;
4141 if (pinfo != NULL) {
4142 *pinfo = info;
4144 return NT_STATUS_OK;
4146 fail:
4147 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
4149 if (fsp != NULL) {
4150 close_file(req, fsp, ERROR_CLOSE);
4151 fsp = NULL;
4153 return status;