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/>.
23 #include "system/filesys.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"
34 extern const struct generic_mapping file_generic_mapping;
36 struct deferred_open_record {
37 bool delayed_for_oplocks;
42 /****************************************************************************
43 If the requester wanted DELETE_ACCESS and was rejected because
44 the file ACL didn't include DELETE_ACCESS, see if the parent ACL
46 ****************************************************************************/
48 static bool parent_override_delete(connection_struct *conn,
49 const struct smb_filename *smb_fname,
51 uint32_t rejected_mask)
53 if ((access_mask & DELETE_ACCESS) &&
54 (rejected_mask & DELETE_ACCESS) &&
55 can_delete_file_in_directory(conn, smb_fname)) {
61 /****************************************************************************
62 Check if we have open rights.
63 ****************************************************************************/
65 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
66 const struct smb_filename *smb_fname,
69 /* Check if we have rights to open. */
71 struct security_descriptor *sd = NULL;
72 uint32_t rejected_share_access;
73 uint32_t rejected_mask = access_mask;
75 rejected_share_access = access_mask & ~(conn->share_access);
77 if (rejected_share_access) {
78 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
80 (unsigned int)access_mask,
81 smb_fname_str_dbg(smb_fname),
82 (unsigned int)rejected_share_access ));
83 return NT_STATUS_ACCESS_DENIED;
86 if (get_current_uid(conn) == (uid_t)0) {
87 /* I'm sorry sir, I didn't know you were root... */
88 DEBUG(10,("smbd_check_access_rights: root override "
89 "on %s. Granting 0x%x\n",
90 smb_fname_str_dbg(smb_fname),
91 (unsigned int)access_mask ));
95 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
96 DEBUG(10,("smbd_check_access_rights: not checking ACL "
97 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
98 smb_fname_str_dbg(smb_fname),
99 (unsigned int)access_mask ));
103 if (access_mask == DELETE_ACCESS &&
104 VALID_STAT(smb_fname->st) &&
105 S_ISLNK(smb_fname->st.st_ex_mode)) {
106 /* We can always delete a symlink. */
107 DEBUG(10,("smbd_check_access_rights: not checking ACL "
108 "on DELETE_ACCESS on symlink %s.\n",
109 smb_fname_str_dbg(smb_fname) ));
113 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
118 if (!NT_STATUS_IS_OK(status)) {
119 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
121 smb_fname_str_dbg(smb_fname),
124 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
132 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
133 * owner WRITE_DAC and READ_CONTROL.
135 status = se_access_check(sd,
136 get_current_nttok(conn),
137 (access_mask & ~FILE_READ_ATTRIBUTES),
140 DEBUG(10,("smbd_check_access_rights: file %s requesting "
141 "0x%x returning 0x%x (%s)\n",
142 smb_fname_str_dbg(smb_fname),
143 (unsigned int)access_mask,
144 (unsigned int)rejected_mask,
145 nt_errstr(status) ));
147 if (!NT_STATUS_IS_OK(status)) {
148 if (DEBUGLEVEL >= 10) {
149 DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
150 smb_fname_str_dbg(smb_fname) ));
151 NDR_PRINT_DEBUG(security_descriptor, sd);
157 if (NT_STATUS_IS_OK(status) ||
158 !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
162 /* Here we know status == NT_STATUS_ACCESS_DENIED. */
166 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
167 (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
168 !lp_store_dos_attributes(SNUM(conn)) &&
169 (lp_map_readonly(SNUM(conn)) ||
170 lp_map_archive(SNUM(conn)) ||
171 lp_map_hidden(SNUM(conn)) ||
172 lp_map_system(SNUM(conn)))) {
173 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
175 DEBUG(10,("smbd_check_access_rights: "
177 "FILE_WRITE_ATTRIBUTES "
179 smb_fname_str_dbg(smb_fname)));
182 if (parent_override_delete(conn,
186 /* Were we trying to do an open
187 * for delete and didn't get DELETE
188 * access (only) ? Check if the
189 * directory allows DELETE_CHILD.
191 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
194 rejected_mask &= ~DELETE_ACCESS;
196 DEBUG(10,("smbd_check_access_rights: "
200 smb_fname_str_dbg(smb_fname)));
203 if (rejected_mask != 0) {
204 return NT_STATUS_ACCESS_DENIED;
209 static NTSTATUS check_parent_access(struct connection_struct *conn,
210 struct smb_filename *smb_fname,
211 uint32_t access_mask)
214 char *parent_dir = NULL;
215 struct security_descriptor *parent_sd = NULL;
216 uint32_t access_granted = 0;
218 if (!parent_dirname(talloc_tos(),
219 smb_fname->base_name,
222 return NT_STATUS_NO_MEMORY;
225 if (get_current_uid(conn) == (uid_t)0) {
226 /* I'm sorry sir, I didn't know you were root... */
227 DEBUG(10,("check_parent_access: root override "
228 "on %s. Granting 0x%x\n",
229 smb_fname_str_dbg(smb_fname),
230 (unsigned int)access_mask ));
234 status = SMB_VFS_GET_NT_ACL(conn,
239 if (!NT_STATUS_IS_OK(status)) {
240 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
241 "%s with error %s\n",
248 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
249 * owner WRITE_DAC and READ_CONTROL.
251 status = se_access_check(parent_sd,
252 get_current_nttok(conn),
253 (access_mask & ~FILE_READ_ATTRIBUTES),
255 if(!NT_STATUS_IS_OK(status)) {
256 DEBUG(5,("check_parent_access: access check "
257 "on directory %s for "
258 "path %s for mask 0x%x returned (0x%x) %s\n",
260 smb_fname->base_name,
263 nt_errstr(status) ));
270 /****************************************************************************
271 fd support routines - attempt to do a dos_open.
272 ****************************************************************************/
274 static NTSTATUS fd_open(struct connection_struct *conn,
279 struct smb_filename *smb_fname = fsp->fsp_name;
280 NTSTATUS status = NT_STATUS_OK;
284 * Never follow symlinks on a POSIX client. The
285 * client should be doing this.
288 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
293 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
294 if (fsp->fh->fd == -1) {
295 int posix_errno = errno;
297 #if defined(ENOTSUP) && defined(OSF1)
298 /* handle special Tru64 errno */
299 if (errno == ENOTSUP) {
304 /* fix broken NetBSD errno */
305 if (errno == EFTYPE) {
309 /* fix broken FreeBSD errno */
310 if (errno == EMLINK) {
313 #endif /* O_NOFOLLOW */
314 status = map_nt_error_from_unix(posix_errno);
315 if (errno == EMFILE) {
316 static time_t last_warned = 0L;
318 if (time((time_t *) NULL) > last_warned) {
319 DEBUG(0,("Too many open files, unable "
320 "to open more! smbd's max "
322 lp_max_open_files()));
323 last_warned = time((time_t *) NULL);
329 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
330 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
331 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
336 /****************************************************************************
337 Close the file associated with a fsp.
338 ****************************************************************************/
340 NTSTATUS fd_close(files_struct *fsp)
347 if (fsp->fh->fd == -1) {
348 return NT_STATUS_OK; /* What we used to call a stat open. */
350 if (fsp->fh->ref_count > 1) {
351 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
354 ret = SMB_VFS_CLOSE(fsp);
357 return map_nt_error_from_unix(errno);
362 /****************************************************************************
363 Change the ownership of a file to that of the parent directory.
364 Do this by fd if possible.
365 ****************************************************************************/
367 void change_file_owner_to_parent(connection_struct *conn,
368 const char *inherit_from_dir,
371 struct smb_filename *smb_fname_parent = NULL;
375 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
376 NULL, NULL, &smb_fname_parent);
377 if (!NT_STATUS_IS_OK(status)) {
381 ret = SMB_VFS_STAT(conn, smb_fname_parent);
383 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
384 "directory %s. Error was %s\n",
385 smb_fname_str_dbg(smb_fname_parent),
387 TALLOC_FREE(smb_fname_parent);
391 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
392 /* Already this uid - no need to change. */
393 DEBUG(10,("change_file_owner_to_parent: file %s "
394 "is already owned by uid %d\n",
396 (int)fsp->fsp_name->st.st_ex_uid ));
397 TALLOC_FREE(smb_fname_parent);
402 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
405 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
406 "file %s to parent directory uid %u. Error "
407 "was %s\n", fsp_str_dbg(fsp),
408 (unsigned int)smb_fname_parent->st.st_ex_uid,
411 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
412 "parent directory uid %u.\n", fsp_str_dbg(fsp),
413 (unsigned int)smb_fname_parent->st.st_ex_uid));
414 /* Ensure the uid entry is updated. */
415 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
418 TALLOC_FREE(smb_fname_parent);
421 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
422 const char *inherit_from_dir,
424 SMB_STRUCT_STAT *psbuf)
426 struct smb_filename *smb_fname_parent = NULL;
427 struct smb_filename *smb_fname_cwd = NULL;
428 char *saved_dir = NULL;
429 TALLOC_CTX *ctx = talloc_tos();
430 NTSTATUS status = NT_STATUS_OK;
433 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
435 if (!NT_STATUS_IS_OK(status)) {
439 ret = SMB_VFS_STAT(conn, smb_fname_parent);
441 status = map_nt_error_from_unix(errno);
442 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
443 "directory %s. Error was %s\n",
444 smb_fname_str_dbg(smb_fname_parent),
449 /* We've already done an lstat into psbuf, and we know it's a
450 directory. If we can cd into the directory and the dev/ino
451 are the same then we can safely chown without races as
452 we're locking the directory in place by being in it. This
453 should work on any UNIX (thanks tridge :-). JRA.
456 saved_dir = vfs_GetWd(ctx,conn);
458 status = map_nt_error_from_unix(errno);
459 DEBUG(0,("change_dir_owner_to_parent: failed to get "
460 "current working directory. Error was %s\n",
465 /* Chdir into the new path. */
466 if (vfs_ChDir(conn, fname) == -1) {
467 status = map_nt_error_from_unix(errno);
468 DEBUG(0,("change_dir_owner_to_parent: failed to change "
469 "current working directory to %s. Error "
470 "was %s\n", fname, strerror(errno) ));
474 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
476 if (!NT_STATUS_IS_OK(status)) {
480 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
482 status = map_nt_error_from_unix(errno);
483 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
484 "directory '.' (%s) Error was %s\n",
485 fname, strerror(errno)));
489 /* Ensure we're pointing at the same place. */
490 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
491 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
492 DEBUG(0,("change_dir_owner_to_parent: "
493 "device/inode on directory %s changed. "
494 "Refusing to chown !\n", fname ));
495 status = NT_STATUS_ACCESS_DENIED;
499 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
500 /* Already this uid - no need to change. */
501 DEBUG(10,("change_dir_owner_to_parent: directory %s "
502 "is already owned by uid %d\n",
504 (int)smb_fname_cwd->st.st_ex_uid ));
505 status = NT_STATUS_OK;
510 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
514 status = map_nt_error_from_unix(errno);
515 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
516 "directory %s to parent directory uid %u. "
517 "Error was %s\n", fname,
518 (unsigned int)smb_fname_parent->st.st_ex_uid,
521 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
522 "directory %s to parent directory uid %u.\n",
523 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
524 /* Ensure the uid entry is updated. */
525 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
529 vfs_ChDir(conn,saved_dir);
531 TALLOC_FREE(smb_fname_parent);
532 TALLOC_FREE(smb_fname_cwd);
536 /****************************************************************************
537 Open a file - returning a guaranteed ATOMIC indication of if the
538 file was created or not.
539 ****************************************************************************/
541 static NTSTATUS fd_open_atomic(struct connection_struct *conn,
547 NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
548 bool file_existed = VALID_STAT(fsp->fsp_name->st);
550 *file_created = false;
552 if (!(flags & O_CREAT)) {
554 * We're not creating the file, just pass through.
556 return fd_open(conn, fsp, flags, mode);
559 if (flags & O_EXCL) {
561 * Fail if already exists, just pass through.
563 status = fd_open(conn, fsp, flags, mode);
564 if (NT_STATUS_IS_OK(status)) {
566 * Here we've opened with O_CREAT|O_EXCL
567 * and got success. We *know* we created
570 *file_created = true;
576 * Now it gets tricky. We have O_CREAT, but not O_EXCL.
577 * To know absolutely if we created the file or not,
578 * we can never call O_CREAT without O_EXCL. So if
579 * we think the file existed, try without O_CREAT|O_EXCL.
580 * If we think the file didn't exist, try with
581 * O_CREAT|O_EXCL. Keep bouncing between these two
582 * requests until either the file is created, or
583 * opened. Either way, we keep going until we get
584 * a returnable result (error, or open/create).
588 int curr_flags = flags;
591 /* Just try open, do not create. */
592 curr_flags &= ~(O_CREAT);
593 status = fd_open(conn, fsp, curr_flags, mode);
594 if (NT_STATUS_EQUAL(status,
595 NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
597 * Someone deleted it in the meantime.
600 file_existed = false;
601 DEBUG(10,("fd_open_atomic: file %s existed. "
603 smb_fname_str_dbg(fsp->fsp_name)));
607 /* Try create exclusively, fail if it exists. */
608 curr_flags |= O_EXCL;
609 status = fd_open(conn, fsp, curr_flags, mode);
610 if (NT_STATUS_EQUAL(status,
611 NT_STATUS_OBJECT_NAME_COLLISION)) {
613 * Someone created it in the meantime.
614 * Retry without O_CREAT.
617 DEBUG(10,("fd_open_atomic: file %s "
618 "did not exist. Retry.\n",
619 smb_fname_str_dbg(fsp->fsp_name)));
622 if (NT_STATUS_IS_OK(status)) {
624 * Here we've opened with O_CREAT|O_EXCL
625 * and got success. We *know* we created
628 *file_created = true;
631 /* Create is done, or failed. */
637 /****************************************************************************
639 ****************************************************************************/
641 static NTSTATUS open_file(files_struct *fsp,
642 connection_struct *conn,
643 struct smb_request *req,
644 const char *parent_dir,
647 uint32 access_mask, /* client requested access mask. */
648 uint32 open_access_mask, /* what we're actually using in the open. */
649 bool *p_file_created)
651 struct smb_filename *smb_fname = fsp->fsp_name;
652 NTSTATUS status = NT_STATUS_OK;
653 int accmode = (flags & O_ACCMODE);
654 int local_flags = flags;
655 bool file_existed = VALID_STAT(fsp->fsp_name->st);
660 /* Check permissions */
663 * This code was changed after seeing a client open request
664 * containing the open mode of (DENY_WRITE/read-only) with
665 * the 'create if not exist' bit set. The previous code
666 * would fail to open the file read only on a read-only share
667 * as it was checking the flags parameter directly against O_RDONLY,
668 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
672 if (!CAN_WRITE(conn)) {
673 /* It's a read-only share - fail if we wanted to write. */
674 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
675 DEBUG(3,("Permission denied opening %s\n",
676 smb_fname_str_dbg(smb_fname)));
677 return NT_STATUS_ACCESS_DENIED;
678 } else if(flags & O_CREAT) {
679 /* We don't want to write - but we must make sure that
680 O_CREAT doesn't create the file if we have write
681 access into the directory.
683 flags &= ~(O_CREAT|O_EXCL);
684 local_flags &= ~(O_CREAT|O_EXCL);
689 * This little piece of insanity is inspired by the
690 * fact that an NT client can open a file for O_RDONLY,
691 * but set the create disposition to FILE_EXISTS_TRUNCATE.
692 * If the client *can* write to the file, then it expects to
693 * truncate the file, even though it is opening for readonly.
694 * Quicken uses this stupid trick in backup file creation...
695 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
696 * for helping track this one down. It didn't bite us in 2.0.x
697 * as we always opened files read-write in that release. JRA.
700 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
701 DEBUG(10,("open_file: truncate requested on read-only open "
702 "for file %s\n", smb_fname_str_dbg(smb_fname)));
703 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
706 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
707 (!file_existed && (local_flags & O_CREAT)) ||
708 ((local_flags & O_TRUNC) == O_TRUNC) ) {
713 * We can't actually truncate here as the file may be locked.
714 * open_file_ntcreate will take care of the truncate later. JRA.
717 local_flags &= ~O_TRUNC;
719 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
721 * We would block on opening a FIFO with no one else on the
722 * other end. Do what we used to do and add O_NONBLOCK to the
726 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
727 local_flags |= O_NONBLOCK;
731 /* Don't create files with Microsoft wildcard characters. */
734 * wildcard characters are allowed in stream names
735 * only test the basefilename
737 wild = fsp->base_fsp->fsp_name->base_name;
739 wild = smb_fname->base_name;
741 if ((local_flags & O_CREAT) && !file_existed &&
743 return NT_STATUS_OBJECT_NAME_INVALID;
746 /* Can we access this file ? */
747 if (!fsp->base_fsp) {
748 /* Only do this check on non-stream open. */
750 status = smbd_check_access_rights(conn,
753 } else if (local_flags & O_CREAT){
754 status = check_parent_access(conn,
758 /* File didn't exist and no O_CREAT. */
759 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
761 if (!NT_STATUS_IS_OK(status)) {
762 DEBUG(10,("open_file: "
766 "smbd_check_access_rights" :
767 "check_parent_access",
768 smb_fname_str_dbg(smb_fname),
769 nt_errstr(status) ));
774 /* Actually do the open */
775 status = fd_open_atomic(conn, fsp, local_flags,
776 unx_mode, p_file_created);
777 if (!NT_STATUS_IS_OK(status)) {
778 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
779 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
780 nt_errstr(status),local_flags,flags));
784 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
786 /* If we have an fd, this stat should succeed. */
787 DEBUG(0,("Error doing fstat on open file %s "
789 smb_fname_str_dbg(smb_fname),
791 status = map_nt_error_from_unix(errno);
796 if (*p_file_created) {
797 /* We created this file. */
799 bool need_re_stat = false;
800 /* Do all inheritance work after we've
801 done a successful fstat call and filled
802 in the stat struct in fsp->fsp_name. */
804 /* Inherit the ACL if required */
805 if (lp_inherit_perms(SNUM(conn))) {
806 inherit_access_posix_acl(conn, parent_dir,
807 smb_fname->base_name,
812 /* Change the owner if required. */
813 if (lp_inherit_owner(SNUM(conn))) {
814 change_file_owner_to_parent(conn, parent_dir,
820 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
821 /* If we have an fd, this stat should succeed. */
823 DEBUG(0,("Error doing fstat on open file %s "
825 smb_fname_str_dbg(smb_fname),
830 notify_fname(conn, NOTIFY_ACTION_ADDED,
831 FILE_NOTIFY_CHANGE_FILE_NAME,
832 smb_fname->base_name);
835 fsp->fh->fd = -1; /* What we used to call a stat open. */
837 /* File must exist for a stat open. */
838 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
841 status = smbd_check_access_rights(conn,
845 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
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
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 "
861 smb_fname_str_dbg(smb_fname),
862 nt_errstr(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)) {
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);
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));
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,
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 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
926 (unsigned int)access_mask, (unsigned int)share_access));
928 if ((entry->access_mask & (FILE_WRITE_DATA|
932 DELETE_ACCESS)) == 0) {
933 DEBUG(10,("share_conflict: No conflict due to "
934 "entry->access_mask = 0x%x\n",
935 (unsigned int)entry->access_mask ));
939 if ((access_mask & (FILE_WRITE_DATA|
943 DELETE_ACCESS)) == 0) {
944 DEBUG(10,("share_conflict: No conflict due to "
945 "access_mask = 0x%x\n",
946 (unsigned int)access_mask ));
950 #if 1 /* JRA TEST - Superdebug. */
951 #define CHECK_MASK(num, am, right, sa, share) \
952 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
953 (unsigned int)(num), (unsigned int)(am), \
954 (unsigned int)(right), (unsigned int)(am)&(right) )); \
955 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
956 (unsigned int)(num), (unsigned int)(sa), \
957 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
958 if (((am) & (right)) && !((sa) & (share))) { \
959 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
960 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
961 (unsigned int)(share) )); \
965 #define CHECK_MASK(num, am, right, 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) )); \
974 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
975 share_access, FILE_SHARE_WRITE);
976 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
977 entry->share_access, FILE_SHARE_WRITE);
979 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
980 share_access, FILE_SHARE_READ);
981 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
982 entry->share_access, FILE_SHARE_READ);
984 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
985 share_access, FILE_SHARE_DELETE);
986 CHECK_MASK(6, access_mask, DELETE_ACCESS,
987 entry->share_access, FILE_SHARE_DELETE);
989 DEBUG(10,("share_conflict: No conflict.\n"));
993 #if defined(DEVELOPER)
994 static void validate_my_share_entries(struct smbd_server_connection *sconn,
996 struct share_mode_entry *share_entry)
998 struct server_id self = messaging_server_id(sconn->msg_ctx);
1001 if (!serverid_equal(&self, &share_entry->pid)) {
1005 if (is_deferred_open_entry(share_entry) &&
1006 !open_was_deferred(sconn, share_entry->op_mid)) {
1007 char *str = talloc_asprintf(talloc_tos(),
1008 "Got a deferred entry without a request: "
1010 share_mode_str(talloc_tos(), num, share_entry));
1014 if (!is_valid_share_mode_entry(share_entry)) {
1018 fsp = file_find_dif(sconn, share_entry->id,
1019 share_entry->share_file_id);
1021 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1022 share_mode_str(talloc_tos(), num, share_entry) ));
1023 smb_panic("validate_my_share_entries: Cannot match a "
1024 "share entry with an open file\n");
1027 if (is_deferred_open_entry(share_entry)) {
1031 if ((share_entry->op_type == NO_OPLOCK) &&
1032 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
1033 /* Someone has already written to it, but I haven't yet
1038 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
1047 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1048 share_mode_str(talloc_tos(), num, share_entry) ));
1049 str = talloc_asprintf(talloc_tos(),
1050 "validate_my_share_entries: "
1051 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
1052 fsp->fsp_name->base_name,
1053 (unsigned int)fsp->oplock_type,
1054 (unsigned int)share_entry->op_type );
1060 bool is_stat_open(uint32 access_mask)
1062 return (access_mask &&
1063 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
1064 FILE_WRITE_ATTRIBUTES))==0) &&
1065 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
1066 FILE_WRITE_ATTRIBUTES)) != 0));
1069 /****************************************************************************
1070 Deal with share modes
1071 Invarient: Share mode must be locked on entry and exit.
1072 Returns -1 on error, or number of share modes on success (may be zero).
1073 ****************************************************************************/
1075 static NTSTATUS open_mode_check(connection_struct *conn,
1076 struct share_mode_lock *lck,
1079 uint32 share_access,
1080 uint32 create_options,
1085 if(lck->data->num_share_modes == 0) {
1086 return NT_STATUS_OK;
1089 /* A delete on close prohibits everything */
1091 if (is_delete_on_close_set(lck, name_hash)) {
1093 * Check the delete on close token
1094 * is valid. It could have been left
1095 * after a server crash.
1097 for(i = 0; i < lck->data->num_share_modes; i++) {
1098 if (!share_mode_stale_pid(lck->data, i)) {
1100 *file_existed = true;
1102 return NT_STATUS_DELETE_PENDING;
1105 return NT_STATUS_OK;
1108 if (is_stat_open(access_mask)) {
1109 /* Stat open that doesn't trigger oplock breaks or share mode
1110 * checks... ! JRA. */
1111 return NT_STATUS_OK;
1115 * Check if the share modes will give us access.
1118 #if defined(DEVELOPER)
1119 for(i = 0; i < lck->data->num_share_modes; i++) {
1120 validate_my_share_entries(conn->sconn, i,
1121 &lck->data->share_modes[i]);
1125 /* Now we check the share modes, after any oplock breaks. */
1126 for(i = 0; i < lck->data->num_share_modes; i++) {
1128 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1132 /* someone else has a share lock on it, check to see if we can
1134 if (share_conflict(&lck->data->share_modes[i],
1135 access_mask, share_access)) {
1137 if (share_mode_stale_pid(lck->data, i)) {
1141 *file_existed = true;
1143 return NT_STATUS_SHARING_VIOLATION;
1147 if (lck->data->num_share_modes != 0) {
1148 *file_existed = true;
1151 return NT_STATUS_OK;
1154 static bool is_delete_request(files_struct *fsp) {
1155 return ((fsp->access_mask == DELETE_ACCESS) &&
1156 (fsp->oplock_type == NO_OPLOCK));
1160 * Send a break message to the oplock holder and delay the open for
1164 static NTSTATUS send_break_message(files_struct *fsp,
1165 struct share_mode_entry *exclusive,
1170 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1172 DEBUG(10, ("Sending break request to PID %s\n",
1173 procid_str_static(&exclusive->pid)));
1174 exclusive->op_mid = mid;
1176 /* Create the message. */
1177 share_mode_entry_to_message(msg, exclusive);
1179 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1180 don't want this set in the share mode struct pointed to by lck. */
1182 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1183 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1184 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1187 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1188 MSG_SMB_BREAK_REQUEST,
1190 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1191 if (!NT_STATUS_IS_OK(status)) {
1192 DEBUG(3, ("Could not send oplock break message: %s\n",
1193 nt_errstr(status)));
1200 * Return share_mode_entry pointers for :
1201 * 1). Batch oplock entry.
1202 * 2). Batch or exclusive oplock entry (may be identical to #1).
1203 * bool have_level2_oplock
1204 * bool have_no_oplock.
1205 * Do internal consistency checks on the share mode for a file.
1208 static void find_oplock_types(files_struct *fsp,
1210 const struct share_mode_lock *lck,
1211 struct share_mode_entry **pp_batch,
1212 struct share_mode_entry **pp_ex_or_batch,
1214 bool *got_no_oplock)
1219 *pp_ex_or_batch = NULL;
1220 *got_level2 = false;
1221 *got_no_oplock = false;
1223 /* Ignore stat or internal opens, as is done in
1224 delay_for_batch_oplocks() and
1225 delay_for_exclusive_oplocks().
1227 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1231 for (i=0; i<lck->data->num_share_modes; i++) {
1232 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1236 if (lck->data->share_modes[i].op_type == NO_OPLOCK &&
1237 is_stat_open(lck->data->share_modes[i].access_mask)) {
1238 /* We ignore stat opens in the table - they
1239 always have NO_OPLOCK and never get or
1240 cause breaks. JRA. */
1244 if (BATCH_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1245 /* batch - can only be one. */
1246 if (share_mode_stale_pid(lck->data, i)) {
1247 DEBUG(10, ("Found stale batch oplock\n"));
1250 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1251 smb_panic("Bad batch oplock entry.");
1253 *pp_batch = &lck->data->share_modes[i];
1256 if (EXCLUSIVE_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1257 if (share_mode_stale_pid(lck->data, i)) {
1258 DEBUG(10, ("Found stale duplicate oplock\n"));
1261 /* Exclusive or batch - can only be one. */
1262 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1263 smb_panic("Bad exclusive or batch oplock entry.");
1265 *pp_ex_or_batch = &lck->data->share_modes[i];
1268 if (LEVEL_II_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1269 if (*pp_batch || *pp_ex_or_batch) {
1270 if (share_mode_stale_pid(lck->data, i)) {
1271 DEBUG(10, ("Found stale LevelII "
1275 smb_panic("Bad levelII oplock entry.");
1280 if (lck->data->share_modes[i].op_type == NO_OPLOCK) {
1281 if (*pp_batch || *pp_ex_or_batch) {
1282 if (share_mode_stale_pid(lck->data, i)) {
1283 DEBUG(10, ("Found stale NO_OPLOCK "
1287 smb_panic("Bad no oplock entry.");
1289 *got_no_oplock = true;
1294 static bool delay_for_batch_oplocks(files_struct *fsp,
1297 struct share_mode_entry *batch_entry)
1299 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1302 if (batch_entry == NULL) {
1306 /* Found a batch oplock */
1307 send_break_message(fsp, batch_entry, mid, oplock_request);
1311 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1314 struct share_mode_entry *ex_entry)
1318 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1321 if (ex_entry == NULL) {
1325 /* Found an exclusive or batch oplock */
1327 delay_it = is_delete_request(fsp) ?
1328 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1334 send_break_message(fsp, ex_entry, mid, oplock_request);
1338 static bool file_has_brlocks(files_struct *fsp)
1340 struct byte_range_lock *br_lck;
1342 br_lck = brl_get_locks_readonly(fsp);
1346 return br_lck->num_locks > 0 ? true : false;
1349 static void grant_fsp_oplock_type(files_struct *fsp,
1351 bool got_level2_oplock,
1352 bool got_a_none_oplock)
1354 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1355 lp_level2_oplocks(SNUM(fsp->conn));
1357 /* Start by granting what the client asked for,
1358 but ensure no SAMBA_PRIVATE bits can be set. */
1359 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1361 if (oplock_request & INTERNAL_OPEN_ONLY) {
1362 /* No oplocks on internal open. */
1363 fsp->oplock_type = NO_OPLOCK;
1364 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1365 fsp->oplock_type, fsp_str_dbg(fsp)));
1369 if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1370 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1372 fsp->oplock_type = NO_OPLOCK;
1375 if (is_stat_open(fsp->access_mask)) {
1376 /* Leave the value already set. */
1377 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1378 fsp->oplock_type, fsp_str_dbg(fsp)));
1383 * Match what was requested (fsp->oplock_type) with
1384 * what was found in the existing share modes.
1387 if (got_a_none_oplock) {
1388 fsp->oplock_type = NO_OPLOCK;
1389 } else if (got_level2_oplock) {
1390 if (fsp->oplock_type == NO_OPLOCK ||
1391 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1392 /* Store a level2 oplock, but don't tell the client */
1393 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1395 fsp->oplock_type = LEVEL_II_OPLOCK;
1398 /* All share_mode_entries are placeholders or deferred.
1399 * Silently upgrade to fake levelII if the client didn't
1400 * ask for an oplock. */
1401 if (fsp->oplock_type == NO_OPLOCK) {
1402 /* Store a level2 oplock, but don't tell the client */
1403 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1408 * Don't grant level2 to clients that don't want them
1409 * or if we've turned them off.
1411 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1412 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1415 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1416 fsp->oplock_type, fsp_str_dbg(fsp)));
1419 bool request_timed_out(struct timeval request_time,
1420 struct timeval timeout)
1422 struct timeval now, end_time;
1424 end_time = timeval_sum(&request_time, &timeout);
1425 return (timeval_compare(&end_time, &now) < 0);
1428 /****************************************************************************
1429 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1430 ****************************************************************************/
1432 static void defer_open(struct share_mode_lock *lck,
1433 struct timeval request_time,
1434 struct timeval timeout,
1435 struct smb_request *req,
1436 struct deferred_open_record *state)
1438 struct server_id self = messaging_server_id(req->sconn->msg_ctx);
1440 /* Paranoia check */
1445 for (i=0; i<lck->data->num_share_modes; i++) {
1446 struct share_mode_entry *e = &lck->data->share_modes[i];
1448 if (is_deferred_open_entry(e) &&
1449 serverid_equal(&self, &e->pid) &&
1450 (e->op_mid == req->mid)) {
1451 DEBUG(0, ("Trying to defer an already deferred "
1452 "request: mid=%llu, exiting\n",
1453 (unsigned long long)req->mid));
1454 exit_server("attempt to defer a deferred request");
1459 /* End paranoia check */
1461 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1462 "open entry for mid %llu\n",
1463 (unsigned int)request_time.tv_sec,
1464 (unsigned int)request_time.tv_usec,
1465 (unsigned long long)req->mid));
1467 if (!push_deferred_open_message_smb(req, request_time, timeout,
1468 state->id, (char *)state, sizeof(*state))) {
1469 exit_server("push_deferred_open_message_smb failed");
1472 add_deferred_open(lck, req->mid, request_time, self, state->id);
1477 /****************************************************************************
1478 On overwrite open ensure that the attributes match.
1479 ****************************************************************************/
1481 bool open_match_attributes(connection_struct *conn,
1482 uint32 old_dos_attr,
1483 uint32 new_dos_attr,
1484 mode_t existing_unx_mode,
1485 mode_t new_unx_mode,
1486 mode_t *returned_unx_mode)
1488 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1490 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1491 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1493 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1494 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1495 *returned_unx_mode = new_unx_mode;
1497 *returned_unx_mode = (mode_t)0;
1500 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1501 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1502 "returned_unx_mode = 0%o\n",
1503 (unsigned int)old_dos_attr,
1504 (unsigned int)existing_unx_mode,
1505 (unsigned int)new_dos_attr,
1506 (unsigned int)*returned_unx_mode ));
1508 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1509 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1510 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1511 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1515 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1516 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1517 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1524 /****************************************************************************
1525 Special FCB or DOS processing in the case of a sharing violation.
1526 Try and find a duplicated file handle.
1527 ****************************************************************************/
1529 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
1530 connection_struct *conn,
1531 files_struct *fsp_to_dup_into,
1532 const struct smb_filename *smb_fname,
1537 uint32 share_access,
1538 uint32 create_options)
1542 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1543 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1545 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1546 fsp = file_find_di_next(fsp)) {
1548 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1549 "vuid = %llu, file_pid = %u, private_options = 0x%x "
1550 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1551 fsp->fh->fd, (unsigned long long)fsp->vuid,
1552 (unsigned int)fsp->file_pid,
1553 (unsigned int)fsp->fh->private_options,
1554 (unsigned int)fsp->access_mask ));
1556 if (fsp->fh->fd != -1 &&
1557 fsp->vuid == vuid &&
1558 fsp->file_pid == file_pid &&
1559 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1560 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1561 (fsp->access_mask & FILE_WRITE_DATA) &&
1562 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1563 strequal(fsp->fsp_name->stream_name,
1564 smb_fname->stream_name)) {
1565 DEBUG(10,("fcb_or_dos_open: file match\n"));
1571 return NT_STATUS_NOT_FOUND;
1574 /* quite an insane set of semantics ... */
1575 if (is_executable(smb_fname->base_name) &&
1576 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1577 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1578 return NT_STATUS_INVALID_PARAMETER;
1581 /* We need to duplicate this fsp. */
1582 return dup_file_fsp(req, fsp, access_mask, share_access,
1583 create_options, fsp_to_dup_into);
1586 static void schedule_defer_open(struct share_mode_lock *lck,
1587 struct timeval request_time,
1588 struct smb_request *req)
1590 struct deferred_open_record state;
1592 /* This is a relative time, added to the absolute
1593 request_time value to get the absolute timeout time.
1594 Note that if this is the second or greater time we enter
1595 this codepath for this particular request mid then
1596 request_time is left as the absolute time of the *first*
1597 time this request mid was processed. This is what allows
1598 the request to eventually time out. */
1600 struct timeval timeout;
1602 /* Normally the smbd we asked should respond within
1603 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1604 * the client did, give twice the timeout as a safety
1605 * measure here in case the other smbd is stuck
1606 * somewhere else. */
1608 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1610 /* Nothing actually uses state.delayed_for_oplocks
1611 but it's handy to differentiate in debug messages
1612 between a 30 second delay due to oplock break, and
1613 a 1 second delay for share mode conflicts. */
1615 state.delayed_for_oplocks = True;
1616 state.async_open = false;
1617 state.id = lck->data->id;
1619 if (!request_timed_out(request_time, timeout)) {
1620 defer_open(lck, request_time, timeout, req, &state);
1624 /****************************************************************************
1625 Reschedule an open call that went asynchronous.
1626 ****************************************************************************/
1628 static void schedule_async_open(struct timeval request_time,
1629 struct smb_request *req)
1631 struct deferred_open_record state;
1632 struct timeval timeout;
1634 timeout = timeval_set(20, 0);
1637 state.delayed_for_oplocks = false;
1638 state.async_open = true;
1640 if (!request_timed_out(request_time, timeout)) {
1641 defer_open(NULL, request_time, timeout, req, &state);
1645 /****************************************************************************
1646 Work out what access_mask to use from what the client sent us.
1647 ****************************************************************************/
1649 static NTSTATUS smbd_calculate_maximum_allowed_access(
1650 connection_struct *conn,
1651 const struct smb_filename *smb_fname,
1652 uint32_t *p_access_mask)
1654 struct security_descriptor *sd;
1655 uint32_t access_granted;
1658 if (get_current_uid(conn) == (uid_t)0) {
1659 *p_access_mask |= FILE_GENERIC_ALL;
1660 return NT_STATUS_OK;
1663 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1668 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1670 * File did not exist
1672 *p_access_mask = FILE_GENERIC_ALL;
1673 return NT_STATUS_OK;
1675 if (!NT_STATUS_IS_OK(status)) {
1676 DEBUG(10,("smbd_calculate_access_mask: "
1677 "Could not get acl on file %s: %s\n",
1678 smb_fname_str_dbg(smb_fname),
1679 nt_errstr(status)));
1680 return NT_STATUS_ACCESS_DENIED;
1684 * Never test FILE_READ_ATTRIBUTES. se_access_check()
1685 * also takes care of owner WRITE_DAC and READ_CONTROL.
1687 status = se_access_check(sd,
1688 get_current_nttok(conn),
1689 (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1694 if (!NT_STATUS_IS_OK(status)) {
1695 DEBUG(10, ("smbd_calculate_access_mask: "
1696 "Access denied on file %s: "
1697 "when calculating maximum access\n",
1698 smb_fname_str_dbg(smb_fname)));
1699 return NT_STATUS_ACCESS_DENIED;
1701 *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1702 return NT_STATUS_OK;
1705 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1706 const struct smb_filename *smb_fname,
1707 uint32_t access_mask,
1708 uint32_t *access_mask_out)
1711 uint32_t orig_access_mask = access_mask;
1712 uint32_t rejected_share_access;
1715 * Convert GENERIC bits to specific bits.
1718 se_map_generic(&access_mask, &file_generic_mapping);
1720 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1721 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1723 status = smbd_calculate_maximum_allowed_access(
1724 conn, smb_fname, &access_mask);
1726 if (!NT_STATUS_IS_OK(status)) {
1730 access_mask &= conn->share_access;
1733 rejected_share_access = access_mask & ~(conn->share_access);
1735 if (rejected_share_access) {
1736 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1737 "file %s: rejected by share access mask[0x%08X] "
1738 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1739 smb_fname_str_dbg(smb_fname),
1741 orig_access_mask, access_mask,
1742 rejected_share_access));
1743 return NT_STATUS_ACCESS_DENIED;
1746 *access_mask_out = access_mask;
1747 return NT_STATUS_OK;
1750 /****************************************************************************
1751 Remove the deferred open entry under lock.
1752 ****************************************************************************/
1754 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1755 struct server_id pid)
1757 struct share_mode_lock *lck = get_existing_share_mode_lock(
1760 DEBUG(0, ("could not get share mode lock\n"));
1763 del_deferred_open_entry(lck, mid, pid);
1767 /****************************************************************************
1768 Return true if this is a state pointer to an asynchronous create.
1769 ****************************************************************************/
1771 bool is_deferred_open_async(const void *ptr)
1773 const struct deferred_open_record *state = (const struct deferred_open_record *)ptr;
1775 return state->async_open;
1778 /****************************************************************************
1779 Open a file with a share mode. Passed in an already created files_struct *.
1780 ****************************************************************************/
1782 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1783 struct smb_request *req,
1784 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1785 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1786 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1787 uint32 create_options, /* options such as delete on close. */
1788 uint32 new_dos_attributes, /* attributes used for new file. */
1789 int oplock_request, /* internal Samba oplock codes. */
1790 /* Information (FILE_EXISTS etc.) */
1791 uint32_t private_flags, /* Samba specific flags. */
1795 struct smb_filename *smb_fname = fsp->fsp_name;
1798 bool file_existed = VALID_STAT(smb_fname->st);
1799 bool def_acl = False;
1800 bool posix_open = False;
1801 bool new_file_created = False;
1802 bool clear_ads = false;
1803 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1804 mode_t new_unx_mode = (mode_t)0;
1805 mode_t unx_mode = (mode_t)0;
1807 uint32 existing_dos_attributes = 0;
1808 struct timeval request_time = timeval_zero();
1809 struct share_mode_lock *lck = NULL;
1810 uint32 open_access_mask = access_mask;
1814 if (conn->printer) {
1816 * Printers are handled completely differently.
1817 * Most of the passed parameters are ignored.
1821 *pinfo = FILE_WAS_CREATED;
1824 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1825 smb_fname_str_dbg(smb_fname)));
1828 DEBUG(0,("open_file_ntcreate: printer open without "
1829 "an SMB request!\n"));
1830 return NT_STATUS_INTERNAL_ERROR;
1833 return print_spool_open(fsp, smb_fname->base_name,
1837 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1839 return NT_STATUS_NO_MEMORY;
1842 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1844 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1845 new_dos_attributes = 0;
1847 /* Windows allows a new file to be created and
1848 silently removes a FILE_ATTRIBUTE_DIRECTORY
1849 sent by the client. Do the same. */
1851 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1853 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1855 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1856 smb_fname, parent_dir);
1859 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1860 "access_mask=0x%x share_access=0x%x "
1861 "create_disposition = 0x%x create_options=0x%x "
1862 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1863 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1864 access_mask, share_access, create_disposition,
1865 create_options, (unsigned int)unx_mode, oplock_request,
1866 (unsigned int)private_flags));
1868 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1869 DEBUG(0, ("No smb request but not an internal only open!\n"));
1870 return NT_STATUS_INTERNAL_ERROR;
1874 * Only non-internal opens can be deferred at all
1879 if (get_deferred_open_message_state(req,
1882 /* Remember the absolute time of the original
1883 request with this mid. We'll use it later to
1884 see if this has timed out. */
1886 /* If it was an async create retry, the file
1889 if (is_deferred_open_async(ptr)) {
1890 SET_STAT_INVALID(smb_fname->st);
1891 file_existed = false;
1893 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1894 /* Remove the deferred open entry under lock. */
1895 remove_deferred_open_entry(
1896 state->id, req->mid,
1897 messaging_server_id(req->sconn->msg_ctx));
1900 /* Ensure we don't reprocess this message. */
1901 remove_deferred_open_message_smb(req->sconn, req->mid);
1906 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1908 existing_dos_attributes = dos_mode(conn, smb_fname);
1912 /* ignore any oplock requests if oplocks are disabled */
1913 if (!lp_oplocks(SNUM(conn)) ||
1914 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1915 /* Mask off everything except the private Samba bits. */
1916 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1919 /* this is for OS/2 long file names - say we don't support them */
1920 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1921 /* OS/2 Workplace shell fix may be main code stream in a later
1923 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1925 if (use_nt_status()) {
1926 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1928 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1931 switch( create_disposition ) {
1933 * Currently we're using FILE_SUPERSEDE as the same as
1934 * FILE_OVERWRITE_IF but they really are
1935 * different. FILE_SUPERSEDE deletes an existing file
1936 * (requiring delete access) then recreates it.
1938 case FILE_SUPERSEDE:
1939 /* If file exists replace/overwrite. If file doesn't
1941 flags2 |= (O_CREAT | O_TRUNC);
1945 case FILE_OVERWRITE_IF:
1946 /* If file exists replace/overwrite. If file doesn't
1948 flags2 |= (O_CREAT | O_TRUNC);
1953 /* If file exists open. If file doesn't exist error. */
1954 if (!file_existed) {
1955 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1956 "requested for file %s and file "
1958 smb_fname_str_dbg(smb_fname)));
1960 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1964 case FILE_OVERWRITE:
1965 /* If file exists overwrite. If file doesn't exist
1967 if (!file_existed) {
1968 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1969 "requested for file %s and file "
1971 smb_fname_str_dbg(smb_fname) ));
1973 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1980 /* If file exists error. If file doesn't exist
1983 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1984 "requested for file %s and file "
1985 "already exists.\n",
1986 smb_fname_str_dbg(smb_fname)));
1987 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1992 return map_nt_error_from_unix(errno);
1994 flags2 |= (O_CREAT|O_EXCL);
1998 /* If file exists open. If file doesn't exist
2004 return NT_STATUS_INVALID_PARAMETER;
2007 /* We only care about matching attributes on file exists and
2010 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
2011 (create_disposition == FILE_OVERWRITE_IF))) {
2012 if (!open_match_attributes(conn, existing_dos_attributes,
2014 smb_fname->st.st_ex_mode,
2015 unx_mode, &new_unx_mode)) {
2016 DEBUG(5,("open_file_ntcreate: attributes missmatch "
2017 "for file %s (%x %x) (0%o, 0%o)\n",
2018 smb_fname_str_dbg(smb_fname),
2019 existing_dos_attributes,
2021 (unsigned int)smb_fname->st.st_ex_mode,
2022 (unsigned int)unx_mode ));
2024 return NT_STATUS_ACCESS_DENIED;
2028 status = smbd_calculate_access_mask(conn, smb_fname,
2031 if (!NT_STATUS_IS_OK(status)) {
2032 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
2033 "on file %s returned %s\n",
2034 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
2038 open_access_mask = access_mask;
2040 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
2041 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
2044 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
2045 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
2049 * Note that we ignore the append flag as append does not
2050 * mean the same thing under DOS and Unix.
2053 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
2054 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
2055 /* DENY_DOS opens are always underlying read-write on the
2056 file handle, no matter what the requested access mask
2058 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
2059 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
2069 * Currently we only look at FILE_WRITE_THROUGH for create options.
2073 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
2078 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
2082 if (!posix_open && !CAN_WRITE(conn)) {
2084 * We should really return a permission denied error if either
2085 * O_CREAT or O_TRUNC are set, but for compatibility with
2086 * older versions of Samba we just AND them out.
2088 flags2 &= ~(O_CREAT|O_TRUNC);
2092 * Ensure we can't write on a read-only share or file.
2095 if (flags != O_RDONLY && file_existed &&
2096 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
2097 DEBUG(5,("open_file_ntcreate: write access requested for "
2098 "file %s on read only %s\n",
2099 smb_fname_str_dbg(smb_fname),
2100 !CAN_WRITE(conn) ? "share" : "file" ));
2102 return NT_STATUS_ACCESS_DENIED;
2105 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2106 fsp->share_access = share_access;
2107 fsp->fh->private_options = private_flags;
2108 fsp->access_mask = open_access_mask; /* We change this to the
2109 * requested access_mask after
2110 * the open is done. */
2111 fsp->posix_open = posix_open;
2113 /* Ensure no SAMBA_PRIVATE bits can be set. */
2114 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
2116 if (timeval_is_zero(&request_time)) {
2117 request_time = fsp->open_time;
2121 struct share_mode_entry *batch_entry = NULL;
2122 struct share_mode_entry *exclusive_entry = NULL;
2123 bool got_level2_oplock = false;
2124 bool got_a_none_oplock = false;
2127 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2128 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2130 lck = get_share_mode_lock(talloc_tos(), id,
2132 smb_fname, &old_write_time);
2134 DEBUG(0, ("Could not get share mode lock\n"));
2135 return NT_STATUS_SHARING_VIOLATION;
2138 /* Get the types we need to examine. */
2139 find_oplock_types(fsp,
2145 &got_a_none_oplock);
2147 /* First pass - send break only on batch oplocks. */
2148 if ((req != NULL) &&
2149 delay_for_batch_oplocks(fsp,
2153 schedule_defer_open(lck, request_time, req);
2155 return NT_STATUS_SHARING_VIOLATION;
2158 /* Use the client requested access mask here, not the one we
2160 status = open_mode_check(conn, lck, fsp->name_hash,
2161 access_mask, share_access,
2162 create_options, &file_existed);
2164 if (NT_STATUS_IS_OK(status)) {
2165 /* We might be going to allow this open. Check oplock
2167 /* Second pass - send break for both batch or
2168 * exclusive oplocks. */
2169 if ((req != NULL) &&
2170 delay_for_exclusive_oplocks(
2175 schedule_defer_open(lck, request_time, req);
2177 return NT_STATUS_SHARING_VIOLATION;
2181 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2182 /* DELETE_PENDING is not deferred for a second */
2187 grant_fsp_oplock_type(fsp,
2192 if (!NT_STATUS_IS_OK(status)) {
2193 uint32 can_access_mask;
2194 bool can_access = True;
2196 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2198 /* Check if this can be done with the deny_dos and fcb
2201 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2202 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2204 DEBUG(0, ("DOS open without an SMB "
2207 return NT_STATUS_INTERNAL_ERROR;
2210 /* Use the client requested access mask here,
2211 * not the one we open with. */
2212 status = fcb_or_dos_open(req,
2223 if (NT_STATUS_IS_OK(status)) {
2226 *pinfo = FILE_WAS_OPENED;
2228 return NT_STATUS_OK;
2233 * This next line is a subtlety we need for
2234 * MS-Access. If a file open will fail due to share
2235 * permissions and also for security (access) reasons,
2236 * we need to return the access failed error, not the
2237 * share error. We can't open the file due to kernel
2238 * oplock deadlock (it's possible we failed above on
2239 * the open_mode_check()) so use a userspace check.
2242 if (flags & O_RDWR) {
2243 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2244 } else if (flags & O_WRONLY) {
2245 can_access_mask = FILE_WRITE_DATA;
2247 can_access_mask = FILE_READ_DATA;
2250 if (((can_access_mask & FILE_WRITE_DATA) &&
2251 !CAN_WRITE(conn)) ||
2252 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2253 smb_fname, can_access_mask))) {
2258 * If we're returning a share violation, ensure we
2259 * cope with the braindead 1 second delay.
2262 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2263 lp_defer_sharing_violations()) {
2264 struct timeval timeout;
2265 struct deferred_open_record state;
2268 /* this is a hack to speed up torture tests
2270 timeout_usecs = lp_parm_int(SNUM(conn),
2271 "smbd","sharedelay",
2272 SHARING_VIOLATION_USEC_WAIT);
2274 /* This is a relative time, added to the absolute
2275 request_time value to get the absolute timeout time.
2276 Note that if this is the second or greater time we enter
2277 this codepath for this particular request mid then
2278 request_time is left as the absolute time of the *first*
2279 time this request mid was processed. This is what allows
2280 the request to eventually time out. */
2282 timeout = timeval_set(0, timeout_usecs);
2284 /* Nothing actually uses state.delayed_for_oplocks
2285 but it's handy to differentiate in debug messages
2286 between a 30 second delay due to oplock break, and
2287 a 1 second delay for share mode conflicts. */
2289 state.delayed_for_oplocks = False;
2290 state.async_open = false;
2294 && !request_timed_out(request_time,
2296 defer_open(lck, request_time, timeout,
2304 * We have detected a sharing violation here
2305 * so return the correct error code
2307 status = NT_STATUS_SHARING_VIOLATION;
2309 status = NT_STATUS_ACCESS_DENIED;
2315 * We exit this block with the share entry *locked*.....
2319 SMB_ASSERT(!file_existed || (lck != NULL));
2322 * Ensure we pay attention to default ACLs on directories if required.
2325 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2326 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2327 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2330 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2331 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2332 (unsigned int)flags, (unsigned int)flags2,
2333 (unsigned int)unx_mode, (unsigned int)access_mask,
2334 (unsigned int)open_access_mask));
2337 * open_file strips any O_TRUNC flags itself.
2340 fsp_open = open_file(fsp, conn, req, parent_dir,
2341 flags|flags2, unx_mode, access_mask,
2342 open_access_mask, &new_file_created);
2344 if (!NT_STATUS_IS_OK(fsp_open)) {
2345 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_RETRY)) {
2346 schedule_async_open(request_time, req);
2352 if (!file_existed) {
2353 struct share_mode_entry *batch_entry = NULL;
2354 struct share_mode_entry *exclusive_entry = NULL;
2355 bool got_level2_oplock = false;
2356 bool got_a_none_oplock = false;
2357 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2360 * Deal with the race condition where two smbd's detect the
2361 * file doesn't exist and do the create at the same time. One
2362 * of them will win and set a share mode, the other (ie. this
2363 * one) should check if the requested share mode for this
2364 * create is allowed.
2368 * Now the file exists and fsp is successfully opened,
2369 * fsp->dev and fsp->inode are valid and should replace the
2370 * dev=0,inode=0 from a non existent file. Spotted by
2371 * Nadav Danieli <nadavd@exanet.com>. JRA.
2376 lck = get_share_mode_lock(talloc_tos(), id,
2378 smb_fname, &old_write_time);
2381 DEBUG(0, ("open_file_ntcreate: Could not get share "
2382 "mode lock for %s\n",
2383 smb_fname_str_dbg(smb_fname)));
2385 return NT_STATUS_SHARING_VIOLATION;
2388 /* Get the types we need to examine. */
2389 find_oplock_types(fsp,
2395 &got_a_none_oplock);
2397 /* First pass - send break only on batch oplocks. */
2398 if ((req != NULL) &&
2399 delay_for_batch_oplocks(fsp,
2403 schedule_defer_open(lck, request_time, req);
2406 return NT_STATUS_SHARING_VIOLATION;
2409 status = open_mode_check(conn, lck, fsp->name_hash,
2410 access_mask, share_access,
2411 create_options, &file_existed);
2413 if (NT_STATUS_IS_OK(status)) {
2414 /* We might be going to allow this open. Check oplock
2416 /* Second pass - send break for both batch or
2417 * exclusive oplocks. */
2418 if ((req != NULL) &&
2419 delay_for_exclusive_oplocks(
2424 schedule_defer_open(lck, request_time, req);
2427 return NT_STATUS_SHARING_VIOLATION;
2431 if (!NT_STATUS_IS_OK(status)) {
2432 struct deferred_open_record state;
2434 state.delayed_for_oplocks = False;
2435 state.async_open = false;
2438 /* Do it all over again immediately. In the second
2439 * round we will find that the file existed and handle
2440 * the DELETE_PENDING and FCB cases correctly. No need
2441 * to duplicate the code here. Essentially this is a
2442 * "goto top of this function", but don't tell
2446 defer_open(lck, request_time, timeval_zero(),
2454 grant_fsp_oplock_type(fsp,
2460 * We exit this block with the share entry *locked*.....
2465 SMB_ASSERT(lck != NULL);
2467 /* Delete streams if create_disposition requires it */
2468 if (!new_file_created && clear_ads &&
2469 !is_ntfs_stream_smb_fname(smb_fname)) {
2470 status = delete_all_streams(conn, smb_fname->base_name);
2471 if (!NT_STATUS_IS_OK(status)) {
2478 /* note that we ignore failure for the following. It is
2479 basically a hack for NFS, and NFS will never set one of
2480 these only read them. Nobody but Samba can ever set a deny
2481 mode and we have already checked our more authoritative
2482 locking database for permission to set this deny mode. If
2483 the kernel refuses the operations then the kernel is wrong.
2484 note that GPFS supports it as well - jmcd */
2486 if (fsp->fh->fd != -1) {
2488 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2489 if(ret_flock == -1 ){
2494 return NT_STATUS_SHARING_VIOLATION;
2499 * At this point onwards, we can guarentee that the share entry
2500 * is locked, whether we created the file or not, and that the
2501 * deny mode is compatible with all current opens.
2505 * If requested, truncate the file.
2508 if (!new_file_created && (flags2&O_TRUNC)) {
2510 * We are modifying the file after open - update the stat
2513 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2514 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2515 status = map_nt_error_from_unix(errno);
2523 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2524 * but we don't have to store this - just ignore it on access check.
2526 if (conn->sconn->using_smb2) {
2528 * SMB2 doesn't return it (according to Microsoft tests).
2529 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2530 * File created with access = 0x7 (Read, Write, Delete)
2531 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2533 fsp->access_mask = access_mask;
2535 /* But SMB1 does. */
2536 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2540 /* stat opens on existing files don't get oplocks. */
2541 if (is_stat_open(open_access_mask)) {
2542 fsp->oplock_type = NO_OPLOCK;
2546 if (new_file_created) {
2547 info = FILE_WAS_CREATED;
2549 if (flags2 & O_TRUNC) {
2550 info = FILE_WAS_OVERWRITTEN;
2552 info = FILE_WAS_OPENED;
2561 * Setup the oplock info in both the shared memory and
2565 status = set_file_oplock(fsp, fsp->oplock_type);
2566 if (!NT_STATUS_IS_OK(status)) {
2568 * Could not get the kernel oplock or there are byte-range
2569 * locks on the file.
2571 fsp->oplock_type = NO_OPLOCK;
2574 set_share_mode(lck, fsp, get_current_uid(conn),
2578 /* Handle strange delete on close create semantics. */
2579 if (create_options & FILE_DELETE_ON_CLOSE) {
2581 status = can_set_delete_on_close(fsp, new_dos_attributes);
2583 if (!NT_STATUS_IS_OK(status)) {
2584 /* Remember to delete the mode we just added. */
2585 del_share_mode(lck, fsp);
2590 /* Note that here we set the *inital* delete on close flag,
2591 not the regular one. The magic gets handled in close. */
2592 fsp->initial_delete_on_close = True;
2595 if (info != FILE_WAS_OPENED) {
2596 /* Files should be initially set as archive */
2597 if (lp_map_archive(SNUM(conn)) ||
2598 lp_store_dos_attributes(SNUM(conn))) {
2600 if (file_set_dosmode(conn, smb_fname,
2601 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2602 parent_dir, true) == 0) {
2603 unx_mode = smb_fname->st.st_ex_mode;
2609 /* Determine sparse flag. */
2611 /* POSIX opens are sparse by default. */
2612 fsp->is_sparse = true;
2614 fsp->is_sparse = (file_existed &&
2615 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2619 * Take care of inherited ACLs on created files - if default ACL not
2623 if (!posix_open && new_file_created && !def_acl) {
2625 int saved_errno = errno; /* We might get ENOSYS in the next
2628 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2630 errno = saved_errno; /* Ignore ENOSYS */
2633 } else if (new_unx_mode) {
2637 /* Attributes need changing. File already existed. */
2640 int saved_errno = errno; /* We might get ENOSYS in the
2642 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2644 if (ret == -1 && errno == ENOSYS) {
2645 errno = saved_errno; /* Ignore ENOSYS */
2647 DEBUG(5, ("open_file_ntcreate: reset "
2648 "attributes of file %s to 0%o\n",
2649 smb_fname_str_dbg(smb_fname),
2650 (unsigned int)new_unx_mode));
2651 ret = 0; /* Don't do the fchmod below. */
2656 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2657 DEBUG(5, ("open_file_ntcreate: failed to reset "
2658 "attributes of file %s to 0%o\n",
2659 smb_fname_str_dbg(smb_fname),
2660 (unsigned int)new_unx_mode));
2663 /* If this is a successful open, we must remove any deferred open
2666 del_deferred_open_entry(lck, req->mid,
2667 messaging_server_id(req->sconn->msg_ctx));
2671 return NT_STATUS_OK;
2675 /****************************************************************************
2676 Open a file for for write to ensure that we can fchmod it.
2677 ****************************************************************************/
2679 NTSTATUS open_file_fchmod(connection_struct *conn,
2680 struct smb_filename *smb_fname,
2681 files_struct **result)
2683 if (!VALID_STAT(smb_fname->st)) {
2684 return NT_STATUS_INVALID_PARAMETER;
2687 return SMB_VFS_CREATE_FILE(
2690 0, /* root_dir_fid */
2691 smb_fname, /* fname */
2692 FILE_WRITE_DATA, /* access_mask */
2693 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2695 FILE_OPEN, /* create_disposition*/
2696 0, /* create_options */
2697 0, /* file_attributes */
2698 INTERNAL_OPEN_ONLY, /* oplock_request */
2699 0, /* allocation_size */
2700 0, /* private_flags */
2703 result, /* result */
2707 static NTSTATUS mkdir_internal(connection_struct *conn,
2708 struct smb_filename *smb_dname,
2709 uint32 file_attributes)
2712 char *parent_dir = NULL;
2714 bool posix_open = false;
2715 bool need_re_stat = false;
2716 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2718 if(access_mask & ~(conn->share_access)) {
2719 DEBUG(5,("mkdir_internal: failing share access "
2720 "%s\n", lp_servicename(SNUM(conn))));
2721 return NT_STATUS_ACCESS_DENIED;
2724 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2726 return NT_STATUS_NO_MEMORY;
2729 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2731 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2733 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2736 status = check_parent_access(conn,
2739 if(!NT_STATUS_IS_OK(status)) {
2740 DEBUG(5,("mkdir_internal: check_parent_access "
2741 "on directory %s for path %s returned %s\n",
2743 smb_dname->base_name,
2744 nt_errstr(status) ));
2748 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2749 return map_nt_error_from_unix(errno);
2752 /* Ensure we're checking for a symlink here.... */
2753 /* We don't want to get caught by a symlink racer. */
2755 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2756 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2757 smb_fname_str_dbg(smb_dname), strerror(errno)));
2758 return map_nt_error_from_unix(errno);
2761 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2762 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2763 smb_fname_str_dbg(smb_dname)));
2764 return NT_STATUS_NOT_A_DIRECTORY;
2767 if (lp_store_dos_attributes(SNUM(conn))) {
2769 file_set_dosmode(conn, smb_dname,
2770 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2775 if (lp_inherit_perms(SNUM(conn))) {
2776 inherit_access_posix_acl(conn, parent_dir,
2777 smb_dname->base_name, mode);
2778 need_re_stat = true;
2783 * Check if high bits should have been set,
2784 * then (if bits are missing): add them.
2785 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2788 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2789 (mode & ~smb_dname->st.st_ex_mode)) {
2790 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2791 (smb_dname->st.st_ex_mode |
2792 (mode & ~smb_dname->st.st_ex_mode)));
2793 need_re_stat = true;
2797 /* Change the owner if required. */
2798 if (lp_inherit_owner(SNUM(conn))) {
2799 change_dir_owner_to_parent(conn, parent_dir,
2800 smb_dname->base_name,
2802 need_re_stat = true;
2806 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2807 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2808 smb_fname_str_dbg(smb_dname), strerror(errno)));
2809 return map_nt_error_from_unix(errno);
2813 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2814 smb_dname->base_name);
2816 return NT_STATUS_OK;
2819 /****************************************************************************
2820 Open a directory from an NT SMB call.
2821 ****************************************************************************/
2823 static NTSTATUS open_directory(connection_struct *conn,
2824 struct smb_request *req,
2825 struct smb_filename *smb_dname,
2827 uint32 share_access,
2828 uint32 create_disposition,
2829 uint32 create_options,
2830 uint32 file_attributes,
2832 files_struct **result)
2834 files_struct *fsp = NULL;
2835 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2836 struct share_mode_lock *lck = NULL;
2838 struct timespec mtimespec;
2841 if (is_ntfs_stream_smb_fname(smb_dname)) {
2842 DEBUG(2, ("open_directory: %s is a stream name!\n",
2843 smb_fname_str_dbg(smb_dname)));
2844 return NT_STATUS_NOT_A_DIRECTORY;
2847 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2848 /* Ensure we have a directory attribute. */
2849 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2852 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2853 "share_access = 0x%x create_options = 0x%x, "
2854 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2855 smb_fname_str_dbg(smb_dname),
2856 (unsigned int)access_mask,
2857 (unsigned int)share_access,
2858 (unsigned int)create_options,
2859 (unsigned int)create_disposition,
2860 (unsigned int)file_attributes));
2862 status = smbd_calculate_access_mask(conn, smb_dname,
2863 access_mask, &access_mask);
2864 if (!NT_STATUS_IS_OK(status)) {
2865 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2866 "on file %s returned %s\n",
2867 smb_fname_str_dbg(smb_dname),
2868 nt_errstr(status)));
2872 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2873 !security_token_has_privilege(get_current_nttok(conn),
2874 SEC_PRIV_SECURITY)) {
2875 DEBUG(10, ("open_directory: open on %s "
2876 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2877 smb_fname_str_dbg(smb_dname)));
2878 return NT_STATUS_PRIVILEGE_NOT_HELD;
2881 switch( create_disposition ) {
2885 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2888 info = FILE_WAS_OPENED;
2893 /* If directory exists error. If directory doesn't
2897 status = NT_STATUS_OBJECT_NAME_COLLISION;
2898 DEBUG(2, ("open_directory: unable to create "
2899 "%s. Error was %s\n",
2900 smb_fname_str_dbg(smb_dname),
2901 nt_errstr(status)));
2905 status = mkdir_internal(conn, smb_dname,
2908 if (!NT_STATUS_IS_OK(status)) {
2909 DEBUG(2, ("open_directory: unable to create "
2910 "%s. Error was %s\n",
2911 smb_fname_str_dbg(smb_dname),
2912 nt_errstr(status)));
2916 info = FILE_WAS_CREATED;
2921 * If directory exists open. If directory doesn't
2926 status = NT_STATUS_OK;
2927 info = FILE_WAS_OPENED;
2929 status = mkdir_internal(conn, smb_dname,
2932 if (NT_STATUS_IS_OK(status)) {
2933 info = FILE_WAS_CREATED;
2935 /* Cope with create race. */
2936 if (!NT_STATUS_EQUAL(status,
2937 NT_STATUS_OBJECT_NAME_COLLISION)) {
2938 DEBUG(2, ("open_directory: unable to create "
2939 "%s. Error was %s\n",
2940 smb_fname_str_dbg(smb_dname),
2941 nt_errstr(status)));
2944 info = FILE_WAS_OPENED;
2950 case FILE_SUPERSEDE:
2951 case FILE_OVERWRITE:
2952 case FILE_OVERWRITE_IF:
2954 DEBUG(5,("open_directory: invalid create_disposition "
2955 "0x%x for directory %s\n",
2956 (unsigned int)create_disposition,
2957 smb_fname_str_dbg(smb_dname)));
2958 return NT_STATUS_INVALID_PARAMETER;
2961 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2962 DEBUG(5,("open_directory: %s is not a directory !\n",
2963 smb_fname_str_dbg(smb_dname)));
2964 return NT_STATUS_NOT_A_DIRECTORY;
2967 if (info == FILE_WAS_OPENED) {
2968 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2969 if (!NT_STATUS_IS_OK(status)) {
2970 DEBUG(10, ("open_directory: smbd_check_access_rights on "
2971 "file %s failed with %s\n",
2972 smb_fname_str_dbg(smb_dname),
2973 nt_errstr(status)));
2978 status = file_new(req, conn, &fsp);
2979 if(!NT_STATUS_IS_OK(status)) {
2984 * Setup the files_struct for it.
2987 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2988 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2989 fsp->file_pid = req ? req->smbpid : 0;
2990 fsp->can_lock = False;
2991 fsp->can_read = False;
2992 fsp->can_write = False;
2994 fsp->share_access = share_access;
2995 fsp->fh->private_options = 0;
2997 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2999 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3000 fsp->print_file = NULL;
3001 fsp->modified = False;
3002 fsp->oplock_type = NO_OPLOCK;
3003 fsp->sent_oplock_break = NO_BREAK_SENT;
3004 fsp->is_directory = True;
3005 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
3006 status = fsp_set_smb_fname(fsp, smb_dname);
3007 if (!NT_STATUS_IS_OK(status)) {
3008 file_free(req, fsp);
3012 mtimespec = smb_dname->st.st_ex_mtime;
3015 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
3017 /* POSIX allows us to open a directory with O_RDONLY. */
3018 status = fd_open(conn, fsp, O_RDONLY, 0);
3020 if (!NT_STATUS_IS_OK(status)) {
3021 DEBUG(5, ("open_directory: Could not open fd for "
3023 smb_fname_str_dbg(smb_dname),
3024 nt_errstr(status)));
3025 file_free(req, fsp);
3029 status = vfs_stat_fsp(fsp);
3030 if (!NT_STATUS_IS_OK(status)) {
3032 file_free(req, fsp);
3036 /* Ensure there was no race condition. */
3037 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
3038 DEBUG(5,("open_directory: stat struct differs for "
3040 smb_fname_str_dbg(smb_dname)));
3042 file_free(req, fsp);
3043 return NT_STATUS_ACCESS_DENIED;
3046 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
3047 conn->connectpath, smb_dname,
3051 DEBUG(0, ("open_directory: Could not get share mode lock for "
3052 "%s\n", smb_fname_str_dbg(smb_dname)));
3054 file_free(req, fsp);
3055 return NT_STATUS_SHARING_VIOLATION;
3058 status = open_mode_check(conn, lck, fsp->name_hash,
3059 access_mask, share_access,
3060 create_options, &dir_existed);
3062 if (!NT_STATUS_IS_OK(status)) {
3065 file_free(req, fsp);
3069 set_share_mode(lck, fsp, get_current_uid(conn),
3070 req ? req->mid : 0, NO_OPLOCK);
3072 /* For directories the delete on close bit at open time seems
3073 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
3074 if (create_options & FILE_DELETE_ON_CLOSE) {
3075 status = can_set_delete_on_close(fsp, 0);
3076 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
3079 file_free(req, fsp);
3083 if (NT_STATUS_IS_OK(status)) {
3084 /* Note that here we set the *inital* delete on close flag,
3085 not the regular one. The magic gets handled in close. */
3086 fsp->initial_delete_on_close = True;
3097 return NT_STATUS_OK;
3100 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
3101 struct smb_filename *smb_dname)
3106 status = SMB_VFS_CREATE_FILE(
3109 0, /* root_dir_fid */
3110 smb_dname, /* fname */
3111 FILE_READ_ATTRIBUTES, /* access_mask */
3112 FILE_SHARE_NONE, /* share_access */
3113 FILE_CREATE, /* create_disposition*/
3114 FILE_DIRECTORY_FILE, /* create_options */
3115 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
3116 0, /* oplock_request */
3117 0, /* allocation_size */
3118 0, /* private_flags */
3124 if (NT_STATUS_IS_OK(status)) {
3125 close_file(req, fsp, NORMAL_CLOSE);
3131 /****************************************************************************
3132 Receive notification that one of our open files has been renamed by another
3134 ****************************************************************************/
3136 void msg_file_was_renamed(struct messaging_context *msg,
3139 struct server_id server_id,
3143 char *frm = (char *)data->data;
3145 const char *sharepath;
3146 const char *base_name;
3147 const char *stream_name;
3148 struct smb_filename *smb_fname = NULL;
3149 size_t sp_len, bn_len;
3151 struct smbd_server_connection *sconn =
3152 talloc_get_type_abort(private_data,
3153 struct smbd_server_connection);
3155 if (data->data == NULL
3156 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3157 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3158 (int)data->length));
3162 /* Unpack the message. */
3163 pull_file_id_24(frm, &id);
3164 sharepath = &frm[24];
3165 sp_len = strlen(sharepath);
3166 base_name = sharepath + sp_len + 1;
3167 bn_len = strlen(base_name);
3168 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3170 /* stream_name must always be NULL if there is no stream. */
3171 if (stream_name[0] == '\0') {
3175 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3176 stream_name, NULL, &smb_fname);
3177 if (!NT_STATUS_IS_OK(status)) {
3181 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3183 sharepath, smb_fname_str_dbg(smb_fname),
3184 file_id_string_tos(&id)));
3186 for(fsp = file_find_di_first(sconn, id); fsp;
3187 fsp = file_find_di_next(fsp)) {
3188 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3190 DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
3191 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
3192 smb_fname_str_dbg(smb_fname)));
3193 status = fsp_set_smb_fname(fsp, smb_fname);
3194 if (!NT_STATUS_IS_OK(status)) {
3199 /* Now we have the complete path we can work out if this is
3200 actually within this share and adjust newname accordingly. */
3201 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3202 "not sharepath %s) "
3203 "%s from %s -> %s\n",
3204 fsp->conn->connectpath,
3208 smb_fname_str_dbg(smb_fname)));
3212 TALLOC_FREE(smb_fname);
3217 * If a main file is opened for delete, all streams need to be checked for
3218 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3219 * If that works, delete them all by setting the delete on close and close.
3222 NTSTATUS open_streams_for_delete(connection_struct *conn,
3225 struct stream_struct *stream_info = NULL;
3226 files_struct **streams = NULL;
3228 unsigned int num_streams = 0;
3229 TALLOC_CTX *frame = talloc_stackframe();
3232 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3233 &num_streams, &stream_info);
3235 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3236 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3237 DEBUG(10, ("no streams around\n"));
3239 return NT_STATUS_OK;
3242 if (!NT_STATUS_IS_OK(status)) {
3243 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3244 nt_errstr(status)));
3248 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3251 if (num_streams == 0) {
3253 return NT_STATUS_OK;
3256 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3257 if (streams == NULL) {
3258 DEBUG(0, ("talloc failed\n"));
3259 status = NT_STATUS_NO_MEMORY;
3263 for (i=0; i<num_streams; i++) {
3264 struct smb_filename *smb_fname = NULL;
3266 if (strequal(stream_info[i].name, "::$DATA")) {
3271 status = create_synthetic_smb_fname(talloc_tos(), fname,
3272 stream_info[i].name,
3274 if (!NT_STATUS_IS_OK(status)) {
3278 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3279 DEBUG(10, ("Unable to stat stream: %s\n",
3280 smb_fname_str_dbg(smb_fname)));
3283 status = SMB_VFS_CREATE_FILE(
3286 0, /* root_dir_fid */
3287 smb_fname, /* fname */
3288 DELETE_ACCESS, /* access_mask */
3289 (FILE_SHARE_READ | /* share_access */
3290 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3291 FILE_OPEN, /* create_disposition*/
3292 0, /* create_options */
3293 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3294 0, /* oplock_request */
3295 0, /* allocation_size */
3296 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3299 &streams[i], /* result */
3302 if (!NT_STATUS_IS_OK(status)) {
3303 DEBUG(10, ("Could not open stream %s: %s\n",
3304 smb_fname_str_dbg(smb_fname),
3305 nt_errstr(status)));
3307 TALLOC_FREE(smb_fname);
3310 TALLOC_FREE(smb_fname);
3314 * don't touch the variable "status" beyond this point :-)
3317 for (i -= 1 ; i >= 0; i--) {
3318 if (streams[i] == NULL) {
3322 DEBUG(10, ("Closing stream # %d, %s\n", i,
3323 fsp_str_dbg(streams[i])));
3324 close_file(NULL, streams[i], NORMAL_CLOSE);
3332 /*********************************************************************
3333 Create a default ACL by inheriting from the parent. If no inheritance
3334 from the parent available, don't set anything. This will leave the actual
3335 permissions the new file or directory already got from the filesystem
3336 as the NT ACL when read.
3337 *********************************************************************/
3339 static NTSTATUS inherit_new_acl(files_struct *fsp)
3341 TALLOC_CTX *ctx = talloc_tos();
3342 char *parent_name = NULL;
3343 struct security_descriptor *parent_desc = NULL;
3344 NTSTATUS status = NT_STATUS_OK;
3345 struct security_descriptor *psd = NULL;
3346 struct dom_sid *owner_sid = NULL;
3347 struct dom_sid *group_sid = NULL;
3348 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3349 bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3350 bool inheritable_components = false;
3353 if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3354 return NT_STATUS_NO_MEMORY;
3357 status = SMB_VFS_GET_NT_ACL(fsp->conn,
3359 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3361 if (!NT_STATUS_IS_OK(status)) {
3365 inheritable_components = sd_has_inheritable_components(parent_desc,
3368 if (!inheritable_components && !inherit_owner) {
3369 /* Nothing to inherit and not setting owner. */
3370 return NT_STATUS_OK;
3373 /* Create an inherited descriptor from the parent. */
3375 if (DEBUGLEVEL >= 10) {
3376 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3377 fsp_str_dbg(fsp) ));
3378 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3381 /* Inherit from parent descriptor if "inherit owner" set. */
3382 if (inherit_owner) {
3383 owner_sid = parent_desc->owner_sid;
3384 group_sid = parent_desc->group_sid;
3387 if (owner_sid == NULL) {
3388 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3390 if (group_sid == NULL) {
3391 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3394 status = se_create_child_secdesc(ctx,
3401 if (!NT_STATUS_IS_OK(status)) {
3405 /* If inheritable_components == false,
3406 se_create_child_secdesc()
3407 creates a security desriptor with a NULL dacl
3408 entry, but with SEC_DESC_DACL_PRESENT. We need
3409 to remove that flag. */
3411 if (!inheritable_components) {
3412 security_info_sent &= ~SECINFO_DACL;
3413 psd->type &= ~SEC_DESC_DACL_PRESENT;
3416 if (DEBUGLEVEL >= 10) {
3417 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3418 fsp_str_dbg(fsp) ));
3419 NDR_PRINT_DEBUG(security_descriptor, psd);
3422 if (inherit_owner) {
3423 /* We need to be root to force this. */
3426 status = SMB_VFS_FSET_NT_ACL(fsp,
3429 if (inherit_owner) {
3436 * Wrapper around open_file_ntcreate and open_directory
3439 static NTSTATUS create_file_unixpath(connection_struct *conn,
3440 struct smb_request *req,
3441 struct smb_filename *smb_fname,
3442 uint32_t access_mask,
3443 uint32_t share_access,
3444 uint32_t create_disposition,
3445 uint32_t create_options,
3446 uint32_t file_attributes,
3447 uint32_t oplock_request,
3448 uint64_t allocation_size,
3449 uint32_t private_flags,
3450 struct security_descriptor *sd,
3451 struct ea_list *ea_list,
3453 files_struct **result,
3456 int info = FILE_WAS_OPENED;
3457 files_struct *base_fsp = NULL;
3458 files_struct *fsp = NULL;
3461 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3462 "file_attributes = 0x%x, share_access = 0x%x, "
3463 "create_disposition = 0x%x create_options = 0x%x "
3464 "oplock_request = 0x%x private_flags = 0x%x "
3465 "ea_list = 0x%p, sd = 0x%p, "
3467 (unsigned int)access_mask,
3468 (unsigned int)file_attributes,
3469 (unsigned int)share_access,
3470 (unsigned int)create_disposition,
3471 (unsigned int)create_options,
3472 (unsigned int)oplock_request,
3473 (unsigned int)private_flags,
3474 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3476 if (create_options & FILE_OPEN_BY_FILE_ID) {
3477 status = NT_STATUS_NOT_SUPPORTED;
3481 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3482 status = NT_STATUS_INVALID_PARAMETER;
3487 oplock_request |= INTERNAL_OPEN_ONLY;
3490 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3491 && (access_mask & DELETE_ACCESS)
3492 && !is_ntfs_stream_smb_fname(smb_fname)) {
3494 * We can't open a file with DELETE access if any of the
3495 * streams is open without FILE_SHARE_DELETE
3497 status = open_streams_for_delete(conn, smb_fname->base_name);
3499 if (!NT_STATUS_IS_OK(status)) {
3504 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3505 !security_token_has_privilege(get_current_nttok(conn),
3506 SEC_PRIV_SECURITY)) {
3507 DEBUG(10, ("create_file_unixpath: open on %s "
3508 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3509 smb_fname_str_dbg(smb_fname)));
3510 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3514 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3515 && is_ntfs_stream_smb_fname(smb_fname)
3516 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3517 uint32 base_create_disposition;
3518 struct smb_filename *smb_fname_base = NULL;
3520 if (create_options & FILE_DIRECTORY_FILE) {
3521 status = NT_STATUS_NOT_A_DIRECTORY;
3525 switch (create_disposition) {
3527 base_create_disposition = FILE_OPEN;
3530 base_create_disposition = FILE_OPEN_IF;
3534 /* Create an smb_filename with stream_name == NULL. */
3535 status = create_synthetic_smb_fname(talloc_tos(),
3536 smb_fname->base_name,
3539 if (!NT_STATUS_IS_OK(status)) {
3543 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3544 DEBUG(10, ("Unable to stat stream: %s\n",
3545 smb_fname_str_dbg(smb_fname_base)));
3548 /* Open the base file. */
3549 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3552 | FILE_SHARE_DELETE,
3553 base_create_disposition,
3554 0, 0, 0, 0, 0, NULL, NULL,
3556 TALLOC_FREE(smb_fname_base);
3558 if (!NT_STATUS_IS_OK(status)) {
3559 DEBUG(10, ("create_file_unixpath for base %s failed: "
3560 "%s\n", smb_fname->base_name,
3561 nt_errstr(status)));
3564 /* we don't need to low level fd */
3569 * If it's a request for a directory open, deal with it separately.
3572 if (create_options & FILE_DIRECTORY_FILE) {
3574 if (create_options & FILE_NON_DIRECTORY_FILE) {
3575 status = NT_STATUS_INVALID_PARAMETER;
3579 /* Can't open a temp directory. IFS kit test. */
3580 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3581 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3582 status = NT_STATUS_INVALID_PARAMETER;
3587 * We will get a create directory here if the Win32
3588 * app specified a security descriptor in the
3589 * CreateDirectory() call.
3593 status = open_directory(
3594 conn, req, smb_fname, access_mask, share_access,
3595 create_disposition, create_options, file_attributes,
3600 * Ordinary file case.
3603 status = file_new(req, conn, &fsp);
3604 if(!NT_STATUS_IS_OK(status)) {
3608 status = fsp_set_smb_fname(fsp, smb_fname);
3609 if (!NT_STATUS_IS_OK(status)) {
3614 * We're opening the stream element of a base_fsp
3615 * we already opened. Set up the base_fsp pointer.
3618 fsp->base_fsp = base_fsp;
3621 status = open_file_ntcreate(conn,
3633 if(!NT_STATUS_IS_OK(status)) {
3634 file_free(req, fsp);
3638 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3640 /* A stream open never opens a directory */
3643 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3648 * Fail the open if it was explicitly a non-directory
3652 if (create_options & FILE_NON_DIRECTORY_FILE) {
3653 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3658 status = open_directory(
3659 conn, req, smb_fname, access_mask,
3660 share_access, create_disposition,
3661 create_options, file_attributes,
3666 if (!NT_STATUS_IS_OK(status)) {
3670 fsp->base_fsp = base_fsp;
3672 if ((ea_list != NULL) &&
3673 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3674 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3675 if (!NT_STATUS_IS_OK(status)) {
3680 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3681 status = NT_STATUS_ACCESS_DENIED;
3685 /* Save the requested allocation size. */
3686 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3688 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3689 fsp->initial_allocation_size = smb_roundup(
3690 fsp->conn, allocation_size);
3691 if (fsp->is_directory) {
3692 /* Can't set allocation size on a directory. */
3693 status = NT_STATUS_ACCESS_DENIED;
3696 if (vfs_allocate_file_space(
3697 fsp, fsp->initial_allocation_size) == -1) {
3698 status = NT_STATUS_DISK_FULL;
3702 fsp->initial_allocation_size = smb_roundup(
3703 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3707 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3708 fsp->base_fsp == NULL) {
3711 * According to the MS documentation, the only time the security
3712 * descriptor is applied to the opened file is iff we *created* the
3713 * file; an existing file stays the same.
3715 * Also, it seems (from observation) that you can open the file with
3716 * any access mask but you can still write the sd. We need to override
3717 * the granted access before we call set_sd
3718 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3721 uint32_t sec_info_sent;
3722 uint32_t saved_access_mask = fsp->access_mask;
3724 sec_info_sent = get_sec_info(sd);
3726 fsp->access_mask = FILE_GENERIC_ALL;
3728 /* Convert all the generic bits. */
3729 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3730 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3732 if (sec_info_sent & (SECINFO_OWNER|
3736 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3739 fsp->access_mask = saved_access_mask;
3741 if (!NT_STATUS_IS_OK(status)) {
3744 } else if (lp_inherit_acls(SNUM(conn))) {
3745 /* Inherit from parent. Errors here are not fatal. */
3746 status = inherit_new_acl(fsp);
3747 if (!NT_STATUS_IS_OK(status)) {
3748 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3750 nt_errstr(status) ));
3755 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3758 if (pinfo != NULL) {
3762 smb_fname->st = fsp->fsp_name->st;
3764 return NT_STATUS_OK;
3767 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3770 if (base_fsp && fsp->base_fsp == base_fsp) {
3772 * The close_file below will close
3777 close_file(req, fsp, ERROR_CLOSE);
3780 if (base_fsp != NULL) {
3781 close_file(req, base_fsp, ERROR_CLOSE);
3788 * Calculate the full path name given a relative fid.
3790 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3791 struct smb_request *req,
3792 uint16_t root_dir_fid,
3793 const struct smb_filename *smb_fname,
3794 struct smb_filename **smb_fname_out)
3796 files_struct *dir_fsp;
3797 char *parent_fname = NULL;
3798 char *new_base_name = NULL;
3801 if (root_dir_fid == 0 || !smb_fname) {
3802 status = NT_STATUS_INTERNAL_ERROR;
3806 dir_fsp = file_fsp(req, root_dir_fid);
3808 if (dir_fsp == NULL) {
3809 status = NT_STATUS_INVALID_HANDLE;
3813 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3814 status = NT_STATUS_INVALID_HANDLE;
3818 if (!dir_fsp->is_directory) {
3821 * Check to see if this is a mac fork of some kind.
3824 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3825 is_ntfs_stream_smb_fname(smb_fname)) {
3826 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3831 we need to handle the case when we get a
3832 relative open relative to a file and the
3833 pathname is blank - this is a reopen!
3834 (hint from demyn plantenberg)
3837 status = NT_STATUS_INVALID_HANDLE;
3841 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3843 * We're at the toplevel dir, the final file name
3844 * must not contain ./, as this is filtered out
3845 * normally by srvstr_get_path and unix_convert
3846 * explicitly rejects paths containing ./.
3848 parent_fname = talloc_strdup(talloc_tos(), "");
3849 if (parent_fname == NULL) {
3850 status = NT_STATUS_NO_MEMORY;
3854 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3857 * Copy in the base directory name.
3860 parent_fname = talloc_array(talloc_tos(), char,
3862 if (parent_fname == NULL) {
3863 status = NT_STATUS_NO_MEMORY;
3866 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3870 * Ensure it ends in a '/'.
3871 * We used TALLOC_SIZE +2 to add space for the '/'.
3875 && (parent_fname[dir_name_len-1] != '\\')
3876 && (parent_fname[dir_name_len-1] != '/')) {
3877 parent_fname[dir_name_len] = '/';
3878 parent_fname[dir_name_len+1] = '\0';
3882 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3883 smb_fname->base_name);
3884 if (new_base_name == NULL) {
3885 status = NT_STATUS_NO_MEMORY;
3889 status = filename_convert(req,
3891 req->flags2 & FLAGS2_DFS_PATHNAMES,
3896 if (!NT_STATUS_IS_OK(status)) {
3901 TALLOC_FREE(parent_fname);
3902 TALLOC_FREE(new_base_name);
3906 NTSTATUS create_file_default(connection_struct *conn,
3907 struct smb_request *req,
3908 uint16_t root_dir_fid,
3909 struct smb_filename *smb_fname,
3910 uint32_t access_mask,
3911 uint32_t share_access,
3912 uint32_t create_disposition,
3913 uint32_t create_options,
3914 uint32_t file_attributes,
3915 uint32_t oplock_request,
3916 uint64_t allocation_size,
3917 uint32_t private_flags,
3918 struct security_descriptor *sd,
3919 struct ea_list *ea_list,
3920 files_struct **result,
3923 int info = FILE_WAS_OPENED;
3924 files_struct *fsp = NULL;
3926 bool stream_name = false;
3928 DEBUG(10,("create_file: access_mask = 0x%x "
3929 "file_attributes = 0x%x, share_access = 0x%x, "
3930 "create_disposition = 0x%x create_options = 0x%x "
3931 "oplock_request = 0x%x "
3932 "private_flags = 0x%x "
3933 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3935 (unsigned int)access_mask,
3936 (unsigned int)file_attributes,
3937 (unsigned int)share_access,
3938 (unsigned int)create_disposition,
3939 (unsigned int)create_options,
3940 (unsigned int)oplock_request,
3941 (unsigned int)private_flags,
3942 (unsigned int)root_dir_fid,
3943 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3946 * Calculate the filename from the root_dir_if if necessary.
3949 if (root_dir_fid != 0) {
3950 struct smb_filename *smb_fname_out = NULL;
3951 status = get_relative_fid_filename(conn, req, root_dir_fid,
3952 smb_fname, &smb_fname_out);
3953 if (!NT_STATUS_IS_OK(status)) {
3956 smb_fname = smb_fname_out;
3960 * Check to see if this is a mac fork of some kind.
3963 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3965 enum FAKE_FILE_TYPE fake_file_type;
3967 fake_file_type = is_fake_file(smb_fname);
3969 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3972 * Here we go! support for changing the disk quotas
3975 * We need to fake up to open this MAGIC QUOTA file
3976 * and return a valid FID.
3978 * w2k close this file directly after openening xp
3979 * also tries a QUERY_FILE_INFO on the file and then
3982 status = open_fake_file(req, conn, req->vuid,
3983 fake_file_type, smb_fname,
3985 if (!NT_STATUS_IS_OK(status)) {
3989 ZERO_STRUCT(smb_fname->st);
3993 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3994 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3999 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
4001 smb_fname->stream_name = NULL;
4002 /* We have to handle this error here. */
4003 if (create_options & FILE_DIRECTORY_FILE) {
4004 status = NT_STATUS_NOT_A_DIRECTORY;
4007 if (lp_posix_pathnames()) {
4008 ret = SMB_VFS_LSTAT(conn, smb_fname);
4010 ret = SMB_VFS_STAT(conn, smb_fname);
4013 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
4014 status = NT_STATUS_FILE_IS_A_DIRECTORY;
4019 status = create_file_unixpath(
4020 conn, req, smb_fname, access_mask, share_access,
4021 create_disposition, create_options, file_attributes,
4022 oplock_request, allocation_size, private_flags,
4026 if (!NT_STATUS_IS_OK(status)) {
4031 DEBUG(10, ("create_file: info=%d\n", info));
4034 if (pinfo != NULL) {
4037 return NT_STATUS_OK;
4040 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
4043 close_file(req, fsp, ERROR_CLOSE);