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_file_access_check() also takes care of
133 * owner WRITE_DAC and READ_CONTROL.
135 status = se_file_access_check(sd,
136 get_current_nttok(conn),
138 (access_mask & ~FILE_READ_ATTRIBUTES),
141 DEBUG(10,("smbd_check_access_rights: file %s requesting "
142 "0x%x returning 0x%x (%s)\n",
143 smb_fname_str_dbg(smb_fname),
144 (unsigned int)access_mask,
145 (unsigned int)rejected_mask,
146 nt_errstr(status) ));
148 if (!NT_STATUS_IS_OK(status)) {
149 if (DEBUGLEVEL >= 10) {
150 DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
151 smb_fname_str_dbg(smb_fname) ));
152 NDR_PRINT_DEBUG(security_descriptor, sd);
158 if (NT_STATUS_IS_OK(status) ||
159 !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
163 /* Here we know status == NT_STATUS_ACCESS_DENIED. */
167 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
168 (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
169 !lp_store_dos_attributes(SNUM(conn)) &&
170 (lp_map_readonly(SNUM(conn)) ||
171 lp_map_archive(SNUM(conn)) ||
172 lp_map_hidden(SNUM(conn)) ||
173 lp_map_system(SNUM(conn)))) {
174 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
176 DEBUG(10,("smbd_check_access_rights: "
178 "FILE_WRITE_ATTRIBUTES "
180 smb_fname_str_dbg(smb_fname)));
183 if (parent_override_delete(conn,
187 /* Were we trying to do an open
188 * for delete and didn't get DELETE
189 * access (only) ? Check if the
190 * directory allows DELETE_CHILD.
192 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
195 rejected_mask &= ~DELETE_ACCESS;
197 DEBUG(10,("smbd_check_access_rights: "
201 smb_fname_str_dbg(smb_fname)));
204 if (rejected_mask != 0) {
205 return NT_STATUS_ACCESS_DENIED;
210 static NTSTATUS check_parent_access(struct connection_struct *conn,
211 struct smb_filename *smb_fname,
212 uint32_t access_mask)
215 char *parent_dir = NULL;
216 struct security_descriptor *parent_sd = NULL;
217 uint32_t access_granted = 0;
219 if (!parent_dirname(talloc_tos(),
220 smb_fname->base_name,
223 return NT_STATUS_NO_MEMORY;
226 if (get_current_uid(conn) == (uid_t)0) {
227 /* I'm sorry sir, I didn't know you were root... */
228 DEBUG(10,("check_parent_access: root override "
229 "on %s. Granting 0x%x\n",
230 smb_fname_str_dbg(smb_fname),
231 (unsigned int)access_mask ));
235 status = SMB_VFS_GET_NT_ACL(conn,
240 if (!NT_STATUS_IS_OK(status)) {
241 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
242 "%s with error %s\n",
249 * Never test FILE_READ_ATTRIBUTES. se_file_access_check() also takes care of
250 * owner WRITE_DAC and READ_CONTROL.
252 status = se_file_access_check(parent_sd,
253 get_current_nttok(conn),
255 (access_mask & ~FILE_READ_ATTRIBUTES),
257 if(!NT_STATUS_IS_OK(status)) {
258 DEBUG(5,("check_parent_access: access check "
259 "on directory %s for "
260 "path %s for mask 0x%x returned (0x%x) %s\n",
262 smb_fname->base_name,
265 nt_errstr(status) ));
272 /****************************************************************************
273 fd support routines - attempt to do a dos_open.
274 ****************************************************************************/
276 static NTSTATUS fd_open(struct connection_struct *conn,
281 struct smb_filename *smb_fname = fsp->fsp_name;
282 NTSTATUS status = NT_STATUS_OK;
286 * Never follow symlinks on a POSIX client. The
287 * client should be doing this.
290 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
295 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
296 if (fsp->fh->fd == -1) {
297 int posix_errno = errno;
299 #if defined(ENOTSUP) && defined(OSF1)
300 /* handle special Tru64 errno */
301 if (errno == ENOTSUP) {
306 /* fix broken NetBSD errno */
307 if (errno == EFTYPE) {
311 /* fix broken FreeBSD errno */
312 if (errno == EMLINK) {
315 #endif /* O_NOFOLLOW */
316 status = map_nt_error_from_unix(posix_errno);
317 if (errno == EMFILE) {
318 static time_t last_warned = 0L;
320 if (time((time_t *) NULL) > last_warned) {
321 DEBUG(0,("Too many open files, unable "
322 "to open more! smbd's max "
324 lp_max_open_files()));
325 last_warned = time((time_t *) NULL);
331 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
332 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
333 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
338 /****************************************************************************
339 Close the file associated with a fsp.
340 ****************************************************************************/
342 NTSTATUS fd_close(files_struct *fsp)
349 if (fsp->fh->fd == -1) {
350 return NT_STATUS_OK; /* What we used to call a stat open. */
352 if (fsp->fh->ref_count > 1) {
353 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
356 ret = SMB_VFS_CLOSE(fsp);
359 return map_nt_error_from_unix(errno);
364 /****************************************************************************
365 Change the ownership of a file to that of the parent directory.
366 Do this by fd if possible.
367 ****************************************************************************/
369 void change_file_owner_to_parent(connection_struct *conn,
370 const char *inherit_from_dir,
373 struct smb_filename *smb_fname_parent = NULL;
377 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
378 NULL, NULL, &smb_fname_parent);
379 if (!NT_STATUS_IS_OK(status)) {
383 ret = SMB_VFS_STAT(conn, smb_fname_parent);
385 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
386 "directory %s. Error was %s\n",
387 smb_fname_str_dbg(smb_fname_parent),
389 TALLOC_FREE(smb_fname_parent);
393 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
394 /* Already this uid - no need to change. */
395 DEBUG(10,("change_file_owner_to_parent: file %s "
396 "is already owned by uid %d\n",
398 (int)fsp->fsp_name->st.st_ex_uid ));
399 TALLOC_FREE(smb_fname_parent);
404 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
407 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
408 "file %s to parent directory uid %u. Error "
409 "was %s\n", fsp_str_dbg(fsp),
410 (unsigned int)smb_fname_parent->st.st_ex_uid,
413 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
414 "parent directory uid %u.\n", fsp_str_dbg(fsp),
415 (unsigned int)smb_fname_parent->st.st_ex_uid));
416 /* Ensure the uid entry is updated. */
417 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
420 TALLOC_FREE(smb_fname_parent);
423 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
424 const char *inherit_from_dir,
426 SMB_STRUCT_STAT *psbuf)
428 struct smb_filename *smb_fname_parent = NULL;
429 struct smb_filename *smb_fname_cwd = NULL;
430 char *saved_dir = NULL;
431 TALLOC_CTX *ctx = talloc_tos();
432 NTSTATUS status = NT_STATUS_OK;
435 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
437 if (!NT_STATUS_IS_OK(status)) {
441 ret = SMB_VFS_STAT(conn, smb_fname_parent);
443 status = map_nt_error_from_unix(errno);
444 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
445 "directory %s. Error was %s\n",
446 smb_fname_str_dbg(smb_fname_parent),
451 /* We've already done an lstat into psbuf, and we know it's a
452 directory. If we can cd into the directory and the dev/ino
453 are the same then we can safely chown without races as
454 we're locking the directory in place by being in it. This
455 should work on any UNIX (thanks tridge :-). JRA.
458 saved_dir = vfs_GetWd(ctx,conn);
460 status = map_nt_error_from_unix(errno);
461 DEBUG(0,("change_dir_owner_to_parent: failed to get "
462 "current working directory. Error was %s\n",
467 /* Chdir into the new path. */
468 if (vfs_ChDir(conn, fname) == -1) {
469 status = map_nt_error_from_unix(errno);
470 DEBUG(0,("change_dir_owner_to_parent: failed to change "
471 "current working directory to %s. Error "
472 "was %s\n", fname, strerror(errno) ));
476 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
478 if (!NT_STATUS_IS_OK(status)) {
482 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
484 status = map_nt_error_from_unix(errno);
485 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
486 "directory '.' (%s) Error was %s\n",
487 fname, strerror(errno)));
491 /* Ensure we're pointing at the same place. */
492 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
493 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
494 DEBUG(0,("change_dir_owner_to_parent: "
495 "device/inode on directory %s changed. "
496 "Refusing to chown !\n", fname ));
497 status = NT_STATUS_ACCESS_DENIED;
501 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
502 /* Already this uid - no need to change. */
503 DEBUG(10,("change_dir_owner_to_parent: directory %s "
504 "is already owned by uid %d\n",
506 (int)smb_fname_cwd->st.st_ex_uid ));
507 status = NT_STATUS_OK;
512 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
516 status = map_nt_error_from_unix(errno);
517 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
518 "directory %s to parent directory uid %u. "
519 "Error was %s\n", fname,
520 (unsigned int)smb_fname_parent->st.st_ex_uid,
523 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
524 "directory %s to parent directory uid %u.\n",
525 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
526 /* Ensure the uid entry is updated. */
527 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
531 vfs_ChDir(conn,saved_dir);
533 TALLOC_FREE(smb_fname_parent);
534 TALLOC_FREE(smb_fname_cwd);
538 /****************************************************************************
539 Open a file - returning a guaranteed ATOMIC indication of if the
540 file was created or not.
541 ****************************************************************************/
543 static NTSTATUS fd_open_atomic(struct connection_struct *conn,
549 NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
550 bool file_existed = VALID_STAT(fsp->fsp_name->st);
552 *file_created = false;
554 if (!(flags & O_CREAT)) {
556 * We're not creating the file, just pass through.
558 return fd_open(conn, fsp, flags, mode);
561 if (flags & O_EXCL) {
563 * Fail if already exists, just pass through.
565 status = fd_open(conn, fsp, flags, mode);
568 * Here we've opened with O_CREAT|O_EXCL. If that went
569 * NT_STATUS_OK, we *know* we created this file.
571 *file_created = NT_STATUS_IS_OK(status);
577 * Now it gets tricky. We have O_CREAT, but not O_EXCL.
578 * To know absolutely if we created the file or not,
579 * we can never call O_CREAT without O_EXCL. So if
580 * we think the file existed, try without O_CREAT|O_EXCL.
581 * If we think the file didn't exist, try with
582 * O_CREAT|O_EXCL. Keep bouncing between these two
583 * requests until either the file is created, or
584 * opened. Either way, we keep going until we get
585 * a returnable result (error, or open/create).
589 int curr_flags = flags;
592 /* Just try open, do not create. */
593 curr_flags &= ~(O_CREAT);
594 status = fd_open(conn, fsp, curr_flags, mode);
595 if (NT_STATUS_EQUAL(status,
596 NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
598 * Someone deleted it in the meantime.
601 file_existed = false;
602 DEBUG(10,("fd_open_atomic: file %s existed. "
604 smb_fname_str_dbg(fsp->fsp_name)));
608 /* Try create exclusively, fail if it exists. */
609 curr_flags |= O_EXCL;
610 status = fd_open(conn, fsp, curr_flags, mode);
611 if (NT_STATUS_EQUAL(status,
612 NT_STATUS_OBJECT_NAME_COLLISION)) {
614 * Someone created it in the meantime.
615 * Retry without O_CREAT.
618 DEBUG(10,("fd_open_atomic: file %s "
619 "did not exist. Retry.\n",
620 smb_fname_str_dbg(fsp->fsp_name)));
623 if (NT_STATUS_IS_OK(status)) {
625 * Here we've opened with O_CREAT|O_EXCL
626 * and got success. We *know* we created
629 *file_created = true;
632 /* Create is done, or failed. */
638 /****************************************************************************
640 ****************************************************************************/
642 static NTSTATUS open_file(files_struct *fsp,
643 connection_struct *conn,
644 struct smb_request *req,
645 const char *parent_dir,
648 uint32 access_mask, /* client requested access mask. */
649 uint32 open_access_mask, /* what we're actually using in the open. */
650 bool *p_file_created)
652 struct smb_filename *smb_fname = fsp->fsp_name;
653 NTSTATUS status = NT_STATUS_OK;
654 int accmode = (flags & O_ACCMODE);
655 int local_flags = flags;
656 bool file_existed = VALID_STAT(fsp->fsp_name->st);
661 /* Check permissions */
664 * This code was changed after seeing a client open request
665 * containing the open mode of (DENY_WRITE/read-only) with
666 * the 'create if not exist' bit set. The previous code
667 * would fail to open the file read only on a read-only share
668 * as it was checking the flags parameter directly against O_RDONLY,
669 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
673 if (!CAN_WRITE(conn)) {
674 /* It's a read-only share - fail if we wanted to write. */
675 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
676 DEBUG(3,("Permission denied opening %s\n",
677 smb_fname_str_dbg(smb_fname)));
678 return NT_STATUS_ACCESS_DENIED;
679 } else if(flags & O_CREAT) {
680 /* We don't want to write - but we must make sure that
681 O_CREAT doesn't create the file if we have write
682 access into the directory.
684 flags &= ~(O_CREAT|O_EXCL);
685 local_flags &= ~(O_CREAT|O_EXCL);
690 * This little piece of insanity is inspired by the
691 * fact that an NT client can open a file for O_RDONLY,
692 * but set the create disposition to FILE_EXISTS_TRUNCATE.
693 * If the client *can* write to the file, then it expects to
694 * truncate the file, even though it is opening for readonly.
695 * Quicken uses this stupid trick in backup file creation...
696 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
697 * for helping track this one down. It didn't bite us in 2.0.x
698 * as we always opened files read-write in that release. JRA.
701 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
702 DEBUG(10,("open_file: truncate requested on read-only open "
703 "for file %s\n", smb_fname_str_dbg(smb_fname)));
704 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
707 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
708 (!file_existed && (local_flags & O_CREAT)) ||
709 ((local_flags & O_TRUNC) == O_TRUNC) ) {
713 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
715 * We would block on opening a FIFO with no one else on the
716 * other end. Do what we used to do and add O_NONBLOCK to the
720 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
721 local_flags &= ~O_TRUNC; /* Can't truncate a FIFO. */
722 local_flags |= O_NONBLOCK;
726 /* Don't create files with Microsoft wildcard characters. */
729 * wildcard characters are allowed in stream names
730 * only test the basefilename
732 wild = fsp->base_fsp->fsp_name->base_name;
734 wild = smb_fname->base_name;
736 if ((local_flags & O_CREAT) && !file_existed &&
738 return NT_STATUS_OBJECT_NAME_INVALID;
741 /* Can we access this file ? */
742 if (!fsp->base_fsp) {
743 /* Only do this check on non-stream open. */
745 status = smbd_check_access_rights(conn,
748 } else if (local_flags & O_CREAT){
749 status = check_parent_access(conn,
753 /* File didn't exist and no O_CREAT. */
754 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
756 if (!NT_STATUS_IS_OK(status)) {
757 DEBUG(10,("open_file: "
761 "smbd_check_access_rights" :
762 "check_parent_access",
763 smb_fname_str_dbg(smb_fname),
764 nt_errstr(status) ));
769 /* Actually do the open */
770 status = fd_open_atomic(conn, fsp, local_flags,
771 unx_mode, p_file_created);
772 if (!NT_STATUS_IS_OK(status)) {
773 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
774 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
775 nt_errstr(status),local_flags,flags));
779 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
781 /* If we have an fd, this stat should succeed. */
782 DEBUG(0,("Error doing fstat on open file %s "
784 smb_fname_str_dbg(smb_fname),
786 status = map_nt_error_from_unix(errno);
791 if (*p_file_created) {
792 /* We created this file. */
794 bool need_re_stat = false;
795 /* Do all inheritance work after we've
796 done a successful fstat call and filled
797 in the stat struct in fsp->fsp_name. */
799 /* Inherit the ACL if required */
800 if (lp_inherit_perms(SNUM(conn))) {
801 inherit_access_posix_acl(conn, parent_dir,
802 smb_fname->base_name,
807 /* Change the owner if required. */
808 if (lp_inherit_owner(SNUM(conn))) {
809 change_file_owner_to_parent(conn, parent_dir,
815 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
816 /* If we have an fd, this stat should succeed. */
818 DEBUG(0,("Error doing fstat on open file %s "
820 smb_fname_str_dbg(smb_fname),
825 notify_fname(conn, NOTIFY_ACTION_ADDED,
826 FILE_NOTIFY_CHANGE_FILE_NAME,
827 smb_fname->base_name);
830 fsp->fh->fd = -1; /* What we used to call a stat open. */
832 /* File must exist for a stat open. */
833 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
836 status = smbd_check_access_rights(conn,
840 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
842 S_ISLNK(smb_fname->st.st_ex_mode)) {
843 /* This is a POSIX stat open for delete
844 * or rename on a symlink that points
846 DEBUG(10,("open_file: allowing POSIX "
847 "open on bad symlink %s\n",
848 smb_fname_str_dbg(smb_fname)));
849 status = NT_STATUS_OK;
852 if (!NT_STATUS_IS_OK(status)) {
853 DEBUG(10,("open_file: "
854 "smbd_check_access_rights on file "
856 smb_fname_str_dbg(smb_fname),
857 nt_errstr(status) ));
863 * POSIX allows read-only opens of directories. We don't
864 * want to do this (we use a different code path for this)
865 * so catch a directory open and return an EISDIR. JRA.
868 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
871 return NT_STATUS_FILE_IS_A_DIRECTORY;
874 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
875 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
876 fsp->file_pid = req ? req->smbpid : 0;
877 fsp->can_lock = True;
878 fsp->can_read = ((access_mask & FILE_READ_DATA) != 0);
881 ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0);
882 fsp->print_file = NULL;
883 fsp->modified = False;
884 fsp->sent_oplock_break = NO_BREAK_SENT;
885 fsp->is_directory = False;
886 if (conn->aio_write_behind_list &&
887 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
888 conn->case_sensitive)) {
889 fsp->aio_write_behind = True;
892 fsp->wcp = NULL; /* Write cache pointer. */
894 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
895 conn->session_info->unix_info->unix_name,
896 smb_fname_str_dbg(smb_fname),
897 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
898 conn->num_files_open));
904 /****************************************************************************
905 Check if we can open a file with a share mode.
906 Returns True if conflict, False if not.
907 ****************************************************************************/
909 static bool share_conflict(struct share_mode_entry *entry,
913 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
914 "entry->share_access = 0x%x, "
915 "entry->private_options = 0x%x\n",
916 (unsigned int)entry->access_mask,
917 (unsigned int)entry->share_access,
918 (unsigned int)entry->private_options));
920 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
921 (unsigned int)access_mask, (unsigned int)share_access));
923 if ((entry->access_mask & (FILE_WRITE_DATA|
927 DELETE_ACCESS)) == 0) {
928 DEBUG(10,("share_conflict: No conflict due to "
929 "entry->access_mask = 0x%x\n",
930 (unsigned int)entry->access_mask ));
934 if ((access_mask & (FILE_WRITE_DATA|
938 DELETE_ACCESS)) == 0) {
939 DEBUG(10,("share_conflict: No conflict due to "
940 "access_mask = 0x%x\n",
941 (unsigned int)access_mask ));
945 #if 1 /* JRA TEST - Superdebug. */
946 #define CHECK_MASK(num, am, right, sa, share) \
947 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
948 (unsigned int)(num), (unsigned int)(am), \
949 (unsigned int)(right), (unsigned int)(am)&(right) )); \
950 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
951 (unsigned int)(num), (unsigned int)(sa), \
952 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
953 if (((am) & (right)) && !((sa) & (share))) { \
954 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
955 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
956 (unsigned int)(share) )); \
960 #define CHECK_MASK(num, am, right, sa, share) \
961 if (((am) & (right)) && !((sa) & (share))) { \
962 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
963 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
964 (unsigned int)(share) )); \
969 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
970 share_access, FILE_SHARE_WRITE);
971 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
972 entry->share_access, FILE_SHARE_WRITE);
974 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
975 share_access, FILE_SHARE_READ);
976 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
977 entry->share_access, FILE_SHARE_READ);
979 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
980 share_access, FILE_SHARE_DELETE);
981 CHECK_MASK(6, access_mask, DELETE_ACCESS,
982 entry->share_access, FILE_SHARE_DELETE);
984 DEBUG(10,("share_conflict: No conflict.\n"));
988 #if defined(DEVELOPER)
989 static void validate_my_share_entries(struct smbd_server_connection *sconn,
991 struct share_mode_entry *share_entry)
993 struct server_id self = messaging_server_id(sconn->msg_ctx);
996 if (!serverid_equal(&self, &share_entry->pid)) {
1000 if (is_deferred_open_entry(share_entry) &&
1001 !open_was_deferred(sconn, share_entry->op_mid)) {
1002 char *str = talloc_asprintf(talloc_tos(),
1003 "Got a deferred entry without a request: "
1005 share_mode_str(talloc_tos(), num, share_entry));
1009 if (!is_valid_share_mode_entry(share_entry)) {
1013 fsp = file_find_dif(sconn, share_entry->id,
1014 share_entry->share_file_id);
1016 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1017 share_mode_str(talloc_tos(), num, share_entry) ));
1018 smb_panic("validate_my_share_entries: Cannot match a "
1019 "share entry with an open file\n");
1022 if (is_deferred_open_entry(share_entry)) {
1026 if ((share_entry->op_type == NO_OPLOCK) &&
1027 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
1028 /* Someone has already written to it, but I haven't yet
1033 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
1042 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1043 share_mode_str(talloc_tos(), num, share_entry) ));
1044 str = talloc_asprintf(talloc_tos(),
1045 "validate_my_share_entries: "
1046 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
1047 fsp->fsp_name->base_name,
1048 (unsigned int)fsp->oplock_type,
1049 (unsigned int)share_entry->op_type );
1055 bool is_stat_open(uint32 access_mask)
1057 return (access_mask &&
1058 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
1059 FILE_WRITE_ATTRIBUTES))==0) &&
1060 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
1061 FILE_WRITE_ATTRIBUTES)) != 0));
1064 /****************************************************************************
1065 Deal with share modes
1066 Invarient: Share mode must be locked on entry and exit.
1067 Returns -1 on error, or number of share modes on success (may be zero).
1068 ****************************************************************************/
1070 static NTSTATUS open_mode_check(connection_struct *conn,
1071 struct share_mode_lock *lck,
1074 uint32 share_access,
1075 uint32 create_options,
1080 if(lck->data->num_share_modes == 0) {
1081 return NT_STATUS_OK;
1084 /* A delete on close prohibits everything */
1086 if (is_delete_on_close_set(lck, name_hash)) {
1088 * Check the delete on close token
1089 * is valid. It could have been left
1090 * after a server crash.
1092 for(i = 0; i < lck->data->num_share_modes; i++) {
1093 if (!share_mode_stale_pid(lck->data, i)) {
1095 *file_existed = true;
1097 return NT_STATUS_DELETE_PENDING;
1100 return NT_STATUS_OK;
1103 if (is_stat_open(access_mask)) {
1104 /* Stat open that doesn't trigger oplock breaks or share mode
1105 * checks... ! JRA. */
1106 return NT_STATUS_OK;
1110 * Check if the share modes will give us access.
1113 #if defined(DEVELOPER)
1114 for(i = 0; i < lck->data->num_share_modes; i++) {
1115 validate_my_share_entries(conn->sconn, i,
1116 &lck->data->share_modes[i]);
1120 /* Now we check the share modes, after any oplock breaks. */
1121 for(i = 0; i < lck->data->num_share_modes; i++) {
1123 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1127 /* someone else has a share lock on it, check to see if we can
1129 if (share_conflict(&lck->data->share_modes[i],
1130 access_mask, share_access)) {
1132 if (share_mode_stale_pid(lck->data, i)) {
1136 *file_existed = true;
1138 return NT_STATUS_SHARING_VIOLATION;
1142 if (lck->data->num_share_modes != 0) {
1143 *file_existed = true;
1146 return NT_STATUS_OK;
1149 static bool is_delete_request(files_struct *fsp) {
1150 return ((fsp->access_mask == DELETE_ACCESS) &&
1151 (fsp->oplock_type == NO_OPLOCK));
1155 * Send a break message to the oplock holder and delay the open for
1159 static NTSTATUS send_break_message(files_struct *fsp,
1160 struct share_mode_entry *exclusive,
1165 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1167 DEBUG(10, ("Sending break request to PID %s\n",
1168 procid_str_static(&exclusive->pid)));
1169 exclusive->op_mid = mid;
1171 /* Create the message. */
1172 share_mode_entry_to_message(msg, exclusive);
1174 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1175 don't want this set in the share mode struct pointed to by lck. */
1177 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1178 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1179 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1182 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1183 MSG_SMB_BREAK_REQUEST,
1185 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1186 if (!NT_STATUS_IS_OK(status)) {
1187 DEBUG(3, ("Could not send oplock break message: %s\n",
1188 nt_errstr(status)));
1195 * Return share_mode_entry pointers for :
1196 * 1). Batch oplock entry.
1197 * 2). Batch or exclusive oplock entry (may be identical to #1).
1198 * bool have_level2_oplock
1199 * bool have_no_oplock.
1200 * Do internal consistency checks on the share mode for a file.
1203 static void find_oplock_types(files_struct *fsp,
1205 const struct share_mode_lock *lck,
1206 struct share_mode_entry **pp_batch,
1207 struct share_mode_entry **pp_ex_or_batch,
1209 bool *got_no_oplock)
1214 *pp_ex_or_batch = NULL;
1215 *got_level2 = false;
1216 *got_no_oplock = false;
1218 /* Ignore stat or internal opens, as is done in
1219 delay_for_batch_oplocks() and
1220 delay_for_exclusive_oplocks().
1222 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1226 for (i=0; i<lck->data->num_share_modes; i++) {
1227 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1231 if (lck->data->share_modes[i].op_type == NO_OPLOCK &&
1232 is_stat_open(lck->data->share_modes[i].access_mask)) {
1233 /* We ignore stat opens in the table - they
1234 always have NO_OPLOCK and never get or
1235 cause breaks. JRA. */
1239 if (BATCH_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1240 /* batch - can only be one. */
1241 if (share_mode_stale_pid(lck->data, i)) {
1242 DEBUG(10, ("Found stale batch oplock\n"));
1245 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1246 smb_panic("Bad batch oplock entry.");
1248 *pp_batch = &lck->data->share_modes[i];
1251 if (EXCLUSIVE_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1252 if (share_mode_stale_pid(lck->data, i)) {
1253 DEBUG(10, ("Found stale duplicate oplock\n"));
1256 /* Exclusive or batch - can only be one. */
1257 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1258 smb_panic("Bad exclusive or batch oplock entry.");
1260 *pp_ex_or_batch = &lck->data->share_modes[i];
1263 if (LEVEL_II_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1264 if (*pp_batch || *pp_ex_or_batch) {
1265 if (share_mode_stale_pid(lck->data, i)) {
1266 DEBUG(10, ("Found stale LevelII "
1270 smb_panic("Bad levelII oplock entry.");
1275 if (lck->data->share_modes[i].op_type == NO_OPLOCK) {
1276 if (*pp_batch || *pp_ex_or_batch) {
1277 if (share_mode_stale_pid(lck->data, i)) {
1278 DEBUG(10, ("Found stale NO_OPLOCK "
1282 smb_panic("Bad no oplock entry.");
1284 *got_no_oplock = true;
1289 static bool delay_for_batch_oplocks(files_struct *fsp,
1292 struct share_mode_entry *batch_entry)
1294 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1297 if (batch_entry == NULL) {
1301 /* Found a batch oplock */
1302 send_break_message(fsp, batch_entry, mid, oplock_request);
1306 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1309 struct share_mode_entry *ex_entry)
1313 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1316 if (ex_entry == NULL) {
1320 /* Found an exclusive or batch oplock */
1322 delay_it = is_delete_request(fsp) ?
1323 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1329 send_break_message(fsp, ex_entry, mid, oplock_request);
1333 static bool file_has_brlocks(files_struct *fsp)
1335 struct byte_range_lock *br_lck;
1337 br_lck = brl_get_locks_readonly(fsp);
1341 return br_lck->num_locks > 0 ? true : false;
1344 static void grant_fsp_oplock_type(files_struct *fsp,
1346 bool got_level2_oplock,
1347 bool got_a_none_oplock)
1349 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1350 lp_level2_oplocks(SNUM(fsp->conn));
1352 /* Start by granting what the client asked for,
1353 but ensure no SAMBA_PRIVATE bits can be set. */
1354 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1356 if (oplock_request & INTERNAL_OPEN_ONLY) {
1357 /* No oplocks on internal open. */
1358 fsp->oplock_type = NO_OPLOCK;
1359 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1360 fsp->oplock_type, fsp_str_dbg(fsp)));
1364 if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1365 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1367 fsp->oplock_type = NO_OPLOCK;
1370 if (is_stat_open(fsp->access_mask)) {
1371 /* Leave the value already set. */
1372 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1373 fsp->oplock_type, fsp_str_dbg(fsp)));
1378 * Match what was requested (fsp->oplock_type) with
1379 * what was found in the existing share modes.
1382 if (got_a_none_oplock) {
1383 fsp->oplock_type = NO_OPLOCK;
1384 } else if (got_level2_oplock) {
1385 if (fsp->oplock_type == NO_OPLOCK ||
1386 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1387 /* Store a level2 oplock, but don't tell the client */
1388 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1390 fsp->oplock_type = LEVEL_II_OPLOCK;
1393 /* All share_mode_entries are placeholders or deferred.
1394 * Silently upgrade to fake levelII if the client didn't
1395 * ask for an oplock. */
1396 if (fsp->oplock_type == NO_OPLOCK) {
1397 /* Store a level2 oplock, but don't tell the client */
1398 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1403 * Don't grant level2 to clients that don't want them
1404 * or if we've turned them off.
1406 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1407 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1410 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1411 fsp->oplock_type, fsp_str_dbg(fsp)));
1414 static bool request_timed_out(struct timeval request_time,
1415 struct timeval timeout)
1417 struct timeval now, end_time;
1419 end_time = timeval_sum(&request_time, &timeout);
1420 return (timeval_compare(&end_time, &now) < 0);
1423 /****************************************************************************
1424 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1425 ****************************************************************************/
1427 static void defer_open(struct share_mode_lock *lck,
1428 struct timeval request_time,
1429 struct timeval timeout,
1430 struct smb_request *req,
1431 struct deferred_open_record *state)
1433 struct server_id self = messaging_server_id(req->sconn->msg_ctx);
1435 /* Paranoia check */
1440 for (i=0; i<lck->data->num_share_modes; i++) {
1441 struct share_mode_entry *e = &lck->data->share_modes[i];
1443 if (is_deferred_open_entry(e) &&
1444 serverid_equal(&self, &e->pid) &&
1445 (e->op_mid == req->mid)) {
1446 DEBUG(0, ("Trying to defer an already deferred "
1447 "request: mid=%llu, exiting\n",
1448 (unsigned long long)req->mid));
1449 exit_server("attempt to defer a deferred request");
1454 /* End paranoia check */
1456 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1457 "open entry for mid %llu\n",
1458 (unsigned int)request_time.tv_sec,
1459 (unsigned int)request_time.tv_usec,
1460 (unsigned long long)req->mid));
1462 if (!push_deferred_open_message_smb(req, request_time, timeout,
1463 state->id, (char *)state, sizeof(*state))) {
1464 exit_server("push_deferred_open_message_smb failed");
1467 add_deferred_open(lck, req->mid, request_time, self, state->id);
1472 /****************************************************************************
1473 On overwrite open ensure that the attributes match.
1474 ****************************************************************************/
1476 static bool open_match_attributes(connection_struct *conn,
1477 uint32 old_dos_attr,
1478 uint32 new_dos_attr,
1479 mode_t existing_unx_mode,
1480 mode_t new_unx_mode,
1481 mode_t *returned_unx_mode)
1483 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1485 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1486 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1488 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1489 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1490 *returned_unx_mode = new_unx_mode;
1492 *returned_unx_mode = (mode_t)0;
1495 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1496 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1497 "returned_unx_mode = 0%o\n",
1498 (unsigned int)old_dos_attr,
1499 (unsigned int)existing_unx_mode,
1500 (unsigned int)new_dos_attr,
1501 (unsigned int)*returned_unx_mode ));
1503 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1504 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1505 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1506 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1510 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1511 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1512 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1519 /****************************************************************************
1520 Special FCB or DOS processing in the case of a sharing violation.
1521 Try and find a duplicated file handle.
1522 ****************************************************************************/
1524 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
1525 connection_struct *conn,
1526 files_struct *fsp_to_dup_into,
1527 const struct smb_filename *smb_fname,
1532 uint32 share_access,
1533 uint32 create_options)
1537 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1538 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1540 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1541 fsp = file_find_di_next(fsp)) {
1543 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1544 "vuid = %llu, file_pid = %u, private_options = 0x%x "
1545 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1546 fsp->fh->fd, (unsigned long long)fsp->vuid,
1547 (unsigned int)fsp->file_pid,
1548 (unsigned int)fsp->fh->private_options,
1549 (unsigned int)fsp->access_mask ));
1551 if (fsp->fh->fd != -1 &&
1552 fsp->vuid == vuid &&
1553 fsp->file_pid == file_pid &&
1554 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1555 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1556 (fsp->access_mask & FILE_WRITE_DATA) &&
1557 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1558 strequal(fsp->fsp_name->stream_name,
1559 smb_fname->stream_name)) {
1560 DEBUG(10,("fcb_or_dos_open: file match\n"));
1566 return NT_STATUS_NOT_FOUND;
1569 /* quite an insane set of semantics ... */
1570 if (is_executable(smb_fname->base_name) &&
1571 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1572 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1573 return NT_STATUS_INVALID_PARAMETER;
1576 /* We need to duplicate this fsp. */
1577 return dup_file_fsp(req, fsp, access_mask, share_access,
1578 create_options, fsp_to_dup_into);
1581 static void schedule_defer_open(struct share_mode_lock *lck,
1582 struct timeval request_time,
1583 struct smb_request *req)
1585 struct deferred_open_record state;
1587 /* This is a relative time, added to the absolute
1588 request_time value to get the absolute timeout time.
1589 Note that if this is the second or greater time we enter
1590 this codepath for this particular request mid then
1591 request_time is left as the absolute time of the *first*
1592 time this request mid was processed. This is what allows
1593 the request to eventually time out. */
1595 struct timeval timeout;
1597 /* Normally the smbd we asked should respond within
1598 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1599 * the client did, give twice the timeout as a safety
1600 * measure here in case the other smbd is stuck
1601 * somewhere else. */
1603 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1605 /* Nothing actually uses state.delayed_for_oplocks
1606 but it's handy to differentiate in debug messages
1607 between a 30 second delay due to oplock break, and
1608 a 1 second delay for share mode conflicts. */
1610 state.delayed_for_oplocks = True;
1611 state.async_open = false;
1612 state.id = lck->data->id;
1614 if (!request_timed_out(request_time, timeout)) {
1615 defer_open(lck, request_time, timeout, req, &state);
1619 /****************************************************************************
1620 Reschedule an open call that went asynchronous.
1621 ****************************************************************************/
1623 static void schedule_async_open(struct timeval request_time,
1624 struct smb_request *req)
1626 struct deferred_open_record state;
1627 struct timeval timeout;
1629 timeout = timeval_set(20, 0);
1632 state.delayed_for_oplocks = false;
1633 state.async_open = true;
1635 if (!request_timed_out(request_time, timeout)) {
1636 defer_open(NULL, request_time, timeout, req, &state);
1640 /****************************************************************************
1641 Work out what access_mask to use from what the client sent us.
1642 ****************************************************************************/
1644 static NTSTATUS smbd_calculate_maximum_allowed_access(
1645 connection_struct *conn,
1646 const struct smb_filename *smb_fname,
1647 uint32_t *p_access_mask)
1649 struct security_descriptor *sd;
1650 uint32_t access_granted;
1653 if (get_current_uid(conn) == (uid_t)0) {
1654 *p_access_mask |= FILE_GENERIC_ALL;
1655 return NT_STATUS_OK;
1658 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1663 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1665 * File did not exist
1667 *p_access_mask = FILE_GENERIC_ALL;
1668 return NT_STATUS_OK;
1670 if (!NT_STATUS_IS_OK(status)) {
1671 DEBUG(10,("smbd_calculate_access_mask: "
1672 "Could not get acl on file %s: %s\n",
1673 smb_fname_str_dbg(smb_fname),
1674 nt_errstr(status)));
1675 return NT_STATUS_ACCESS_DENIED;
1679 * Never test FILE_READ_ATTRIBUTES. se_file_access_check()
1680 * also takes care of owner WRITE_DAC and READ_CONTROL.
1682 status = se_file_access_check(sd,
1683 get_current_nttok(conn),
1685 (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1690 if (!NT_STATUS_IS_OK(status)) {
1691 DEBUG(10, ("smbd_calculate_access_mask: "
1692 "Access denied on file %s: "
1693 "when calculating maximum access\n",
1694 smb_fname_str_dbg(smb_fname)));
1695 return NT_STATUS_ACCESS_DENIED;
1697 *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1698 return NT_STATUS_OK;
1701 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1702 const struct smb_filename *smb_fname,
1703 uint32_t access_mask,
1704 uint32_t *access_mask_out)
1707 uint32_t orig_access_mask = access_mask;
1708 uint32_t rejected_share_access;
1711 * Convert GENERIC bits to specific bits.
1714 se_map_generic(&access_mask, &file_generic_mapping);
1716 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1717 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1719 status = smbd_calculate_maximum_allowed_access(
1720 conn, smb_fname, &access_mask);
1722 if (!NT_STATUS_IS_OK(status)) {
1726 access_mask &= conn->share_access;
1729 rejected_share_access = access_mask & ~(conn->share_access);
1731 if (rejected_share_access) {
1732 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1733 "file %s: rejected by share access mask[0x%08X] "
1734 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1735 smb_fname_str_dbg(smb_fname),
1737 orig_access_mask, access_mask,
1738 rejected_share_access));
1739 return NT_STATUS_ACCESS_DENIED;
1742 *access_mask_out = access_mask;
1743 return NT_STATUS_OK;
1746 /****************************************************************************
1747 Remove the deferred open entry under lock.
1748 ****************************************************************************/
1750 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1751 struct server_id pid)
1753 struct share_mode_lock *lck = get_existing_share_mode_lock(
1756 DEBUG(0, ("could not get share mode lock\n"));
1759 del_deferred_open_entry(lck, mid, pid);
1763 /****************************************************************************
1764 Return true if this is a state pointer to an asynchronous create.
1765 ****************************************************************************/
1767 bool is_deferred_open_async(const void *ptr)
1769 const struct deferred_open_record *state = (const struct deferred_open_record *)ptr;
1771 return state->async_open;
1774 static bool clear_ads(uint32_t create_disposition)
1778 switch (create_disposition) {
1779 case FILE_SUPERSEDE:
1780 case FILE_OVERWRITE_IF:
1781 case FILE_OVERWRITE:
1790 static int disposition_to_open_flags(uint32_t create_disposition)
1795 * Currently we're using FILE_SUPERSEDE as the same as
1796 * FILE_OVERWRITE_IF but they really are
1797 * different. FILE_SUPERSEDE deletes an existing file
1798 * (requiring delete access) then recreates it.
1801 switch (create_disposition) {
1802 case FILE_SUPERSEDE:
1803 case FILE_OVERWRITE_IF:
1805 * If file exists replace/overwrite. If file doesn't
1808 ret = O_CREAT|O_TRUNC;
1813 * If file exists open. If file doesn't exist error.
1818 case FILE_OVERWRITE:
1820 * If file exists overwrite. If file doesn't exist
1828 * If file exists error. If file doesn't exist create.
1830 ret = O_CREAT|O_EXCL;
1835 * If file exists open. If file doesn't exist create.
1843 /****************************************************************************
1844 Open a file with a share mode. Passed in an already created files_struct *.
1845 ****************************************************************************/
1847 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1848 struct smb_request *req,
1849 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1850 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1851 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1852 uint32 create_options, /* options such as delete on close. */
1853 uint32 new_dos_attributes, /* attributes used for new file. */
1854 int oplock_request, /* internal Samba oplock codes. */
1855 /* Information (FILE_EXISTS etc.) */
1856 uint32_t private_flags, /* Samba specific flags. */
1860 struct smb_filename *smb_fname = fsp->fsp_name;
1863 bool file_existed = VALID_STAT(smb_fname->st);
1864 bool def_acl = False;
1865 bool posix_open = False;
1866 bool new_file_created = False;
1867 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1868 mode_t new_unx_mode = (mode_t)0;
1869 mode_t unx_mode = (mode_t)0;
1871 uint32 existing_dos_attributes = 0;
1872 struct timeval request_time = timeval_zero();
1873 struct share_mode_lock *lck = NULL;
1874 uint32 open_access_mask = access_mask;
1877 SMB_STRUCT_STAT saved_stat = smb_fname->st;
1879 if (conn->printer) {
1881 * Printers are handled completely differently.
1882 * Most of the passed parameters are ignored.
1886 *pinfo = FILE_WAS_CREATED;
1889 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1890 smb_fname_str_dbg(smb_fname)));
1893 DEBUG(0,("open_file_ntcreate: printer open without "
1894 "an SMB request!\n"));
1895 return NT_STATUS_INTERNAL_ERROR;
1898 return print_spool_open(fsp, smb_fname->base_name,
1902 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1904 return NT_STATUS_NO_MEMORY;
1907 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1909 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1910 new_dos_attributes = 0;
1912 /* Windows allows a new file to be created and
1913 silently removes a FILE_ATTRIBUTE_DIRECTORY
1914 sent by the client. Do the same. */
1916 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1918 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1920 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1921 smb_fname, parent_dir);
1924 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1925 "access_mask=0x%x share_access=0x%x "
1926 "create_disposition = 0x%x create_options=0x%x "
1927 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1928 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1929 access_mask, share_access, create_disposition,
1930 create_options, (unsigned int)unx_mode, oplock_request,
1931 (unsigned int)private_flags));
1933 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1934 DEBUG(0, ("No smb request but not an internal only open!\n"));
1935 return NT_STATUS_INTERNAL_ERROR;
1939 * Only non-internal opens can be deferred at all
1944 if (get_deferred_open_message_state(req,
1947 /* Remember the absolute time of the original
1948 request with this mid. We'll use it later to
1949 see if this has timed out. */
1951 /* If it was an async create retry, the file
1954 if (is_deferred_open_async(ptr)) {
1955 SET_STAT_INVALID(smb_fname->st);
1956 file_existed = false;
1958 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1959 /* Remove the deferred open entry under lock. */
1960 remove_deferred_open_entry(
1961 state->id, req->mid,
1962 messaging_server_id(req->sconn->msg_ctx));
1965 /* Ensure we don't reprocess this message. */
1966 remove_deferred_open_message_smb(req->sconn, req->mid);
1971 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1973 existing_dos_attributes = dos_mode(conn, smb_fname);
1977 /* ignore any oplock requests if oplocks are disabled */
1978 if (!lp_oplocks(SNUM(conn)) ||
1979 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1980 /* Mask off everything except the private Samba bits. */
1981 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1984 /* this is for OS/2 long file names - say we don't support them */
1985 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1986 /* OS/2 Workplace shell fix may be main code stream in a later
1988 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1990 if (use_nt_status()) {
1991 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1993 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1996 switch( create_disposition ) {
1998 /* If file exists open. If file doesn't exist error. */
1999 if (!file_existed) {
2000 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
2001 "requested for file %s and file "
2003 smb_fname_str_dbg(smb_fname)));
2005 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2009 case FILE_OVERWRITE:
2010 /* If file exists overwrite. If file doesn't exist
2012 if (!file_existed) {
2013 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
2014 "requested for file %s and file "
2016 smb_fname_str_dbg(smb_fname) ));
2018 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2023 /* If file exists error. If file doesn't exist
2026 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
2027 "requested for file %s and file "
2028 "already exists.\n",
2029 smb_fname_str_dbg(smb_fname)));
2030 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
2035 return map_nt_error_from_unix(errno);
2039 case FILE_SUPERSEDE:
2040 case FILE_OVERWRITE_IF:
2044 return NT_STATUS_INVALID_PARAMETER;
2047 flags2 = disposition_to_open_flags(create_disposition);
2049 /* We only care about matching attributes on file exists and
2052 if (!posix_open && file_existed &&
2053 ((create_disposition == FILE_OVERWRITE) ||
2054 (create_disposition == FILE_OVERWRITE_IF))) {
2055 if (!open_match_attributes(conn, existing_dos_attributes,
2057 smb_fname->st.st_ex_mode,
2058 unx_mode, &new_unx_mode)) {
2059 DEBUG(5,("open_file_ntcreate: attributes missmatch "
2060 "for file %s (%x %x) (0%o, 0%o)\n",
2061 smb_fname_str_dbg(smb_fname),
2062 existing_dos_attributes,
2064 (unsigned int)smb_fname->st.st_ex_mode,
2065 (unsigned int)unx_mode ));
2067 return NT_STATUS_ACCESS_DENIED;
2071 status = smbd_calculate_access_mask(conn, smb_fname,
2074 if (!NT_STATUS_IS_OK(status)) {
2075 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
2076 "on file %s returned %s\n",
2077 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
2081 open_access_mask = access_mask;
2083 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
2084 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
2087 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
2088 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
2092 * Note that we ignore the append flag as append does not
2093 * mean the same thing under DOS and Unix.
2096 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
2097 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
2098 /* DENY_DOS opens are always underlying read-write on the
2099 file handle, no matter what the requested access mask
2101 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
2102 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
2112 * Currently we only look at FILE_WRITE_THROUGH for create options.
2116 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
2121 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
2125 if (!posix_open && !CAN_WRITE(conn)) {
2127 * We should really return a permission denied error if either
2128 * O_CREAT or O_TRUNC are set, but for compatibility with
2129 * older versions of Samba we just AND them out.
2131 flags2 &= ~(O_CREAT|O_TRUNC);
2135 * Ensure we can't write on a read-only share or file.
2138 if (flags != O_RDONLY && file_existed &&
2139 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
2140 DEBUG(5,("open_file_ntcreate: write access requested for "
2141 "file %s on read only %s\n",
2142 smb_fname_str_dbg(smb_fname),
2143 !CAN_WRITE(conn) ? "share" : "file" ));
2145 return NT_STATUS_ACCESS_DENIED;
2148 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2149 fsp->share_access = share_access;
2150 fsp->fh->private_options = private_flags;
2151 fsp->access_mask = open_access_mask; /* We change this to the
2152 * requested access_mask after
2153 * the open is done. */
2154 fsp->posix_open = posix_open;
2156 /* Ensure no SAMBA_PRIVATE bits can be set. */
2157 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
2159 if (timeval_is_zero(&request_time)) {
2160 request_time = fsp->open_time;
2164 struct share_mode_entry *batch_entry = NULL;
2165 struct share_mode_entry *exclusive_entry = NULL;
2166 bool got_level2_oplock = false;
2167 bool got_a_none_oplock = false;
2170 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2171 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2173 lck = get_share_mode_lock(talloc_tos(), id,
2175 smb_fname, &old_write_time);
2177 DEBUG(0, ("Could not get share mode lock\n"));
2178 return NT_STATUS_SHARING_VIOLATION;
2181 /* Get the types we need to examine. */
2182 find_oplock_types(fsp,
2188 &got_a_none_oplock);
2190 /* First pass - send break only on batch oplocks. */
2191 if ((req != NULL) &&
2192 delay_for_batch_oplocks(fsp,
2196 schedule_defer_open(lck, request_time, req);
2198 return NT_STATUS_SHARING_VIOLATION;
2201 /* Use the client requested access mask here, not the one we
2203 status = open_mode_check(conn, lck, fsp->name_hash,
2204 access_mask, share_access,
2205 create_options, &file_existed);
2207 if (NT_STATUS_IS_OK(status)) {
2208 /* We might be going to allow this open. Check oplock
2210 /* Second pass - send break for both batch or
2211 * exclusive oplocks. */
2212 if ((req != NULL) &&
2213 delay_for_exclusive_oplocks(
2218 schedule_defer_open(lck, request_time, req);
2220 return NT_STATUS_SHARING_VIOLATION;
2224 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2225 /* DELETE_PENDING is not deferred for a second */
2230 grant_fsp_oplock_type(fsp,
2235 if (!NT_STATUS_IS_OK(status)) {
2236 uint32 can_access_mask;
2237 bool can_access = True;
2239 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2241 /* Check if this can be done with the deny_dos and fcb
2244 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2245 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2247 DEBUG(0, ("DOS open without an SMB "
2250 return NT_STATUS_INTERNAL_ERROR;
2253 /* Use the client requested access mask here,
2254 * not the one we open with. */
2255 status = fcb_or_dos_open(req,
2266 if (NT_STATUS_IS_OK(status)) {
2269 *pinfo = FILE_WAS_OPENED;
2271 return NT_STATUS_OK;
2276 * This next line is a subtlety we need for
2277 * MS-Access. If a file open will fail due to share
2278 * permissions and also for security (access) reasons,
2279 * we need to return the access failed error, not the
2280 * share error. We can't open the file due to kernel
2281 * oplock deadlock (it's possible we failed above on
2282 * the open_mode_check()) so use a userspace check.
2285 if (flags & O_RDWR) {
2286 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2287 } else if (flags & O_WRONLY) {
2288 can_access_mask = FILE_WRITE_DATA;
2290 can_access_mask = FILE_READ_DATA;
2293 if (((can_access_mask & FILE_WRITE_DATA) &&
2294 !CAN_WRITE(conn)) ||
2295 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2296 smb_fname, can_access_mask))) {
2301 * If we're returning a share violation, ensure we
2302 * cope with the braindead 1 second delay.
2305 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2306 lp_defer_sharing_violations()) {
2307 struct timeval timeout;
2308 struct deferred_open_record state;
2311 /* this is a hack to speed up torture tests
2313 timeout_usecs = lp_parm_int(SNUM(conn),
2314 "smbd","sharedelay",
2315 SHARING_VIOLATION_USEC_WAIT);
2317 /* This is a relative time, added to the absolute
2318 request_time value to get the absolute timeout time.
2319 Note that if this is the second or greater time we enter
2320 this codepath for this particular request mid then
2321 request_time is left as the absolute time of the *first*
2322 time this request mid was processed. This is what allows
2323 the request to eventually time out. */
2325 timeout = timeval_set(0, timeout_usecs);
2327 /* Nothing actually uses state.delayed_for_oplocks
2328 but it's handy to differentiate in debug messages
2329 between a 30 second delay due to oplock break, and
2330 a 1 second delay for share mode conflicts. */
2332 state.delayed_for_oplocks = False;
2333 state.async_open = false;
2337 && !request_timed_out(request_time,
2339 defer_open(lck, request_time, timeout,
2347 * We have detected a sharing violation here
2348 * so return the correct error code
2350 status = NT_STATUS_SHARING_VIOLATION;
2352 status = NT_STATUS_ACCESS_DENIED;
2358 * We exit this block with the share entry *locked*.....
2362 SMB_ASSERT(!file_existed || (lck != NULL));
2365 * Ensure we pay attention to default ACLs on directories if required.
2368 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2369 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2370 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2373 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2374 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2375 (unsigned int)flags, (unsigned int)flags2,
2376 (unsigned int)unx_mode, (unsigned int)access_mask,
2377 (unsigned int)open_access_mask));
2379 fsp_open = open_file(fsp, conn, req, parent_dir,
2380 flags|flags2, unx_mode, access_mask,
2381 open_access_mask, &new_file_created);
2383 if (!NT_STATUS_IS_OK(fsp_open)) {
2384 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_RETRY)) {
2385 schedule_async_open(request_time, req);
2391 if (file_existed && !check_same_dev_ino(&saved_stat, &smb_fname->st)) {
2393 * The file did exist, but some other (local or NFS)
2394 * process either renamed/unlinked and re-created the
2395 * file with different dev/ino after we walked the path,
2396 * but before we did the open. We could retry the
2397 * open but it's a rare enough case it's easier to
2398 * just fail the open to prevent creating any problems
2399 * in the open file db having the wrong dev/ino key.
2403 DEBUG(1,("open_file_ntcreate: file %s - dev/ino mismatch. "
2404 "Old (dev=0x%llu, ino =0x%llu). "
2405 "New (dev=0x%llu, ino=0x%llu). Failing open "
2406 " with NT_STATUS_ACCESS_DENIED.\n",
2407 smb_fname_str_dbg(smb_fname),
2408 (unsigned long long)saved_stat.st_ex_dev,
2409 (unsigned long long)saved_stat.st_ex_ino,
2410 (unsigned long long)smb_fname->st.st_ex_dev,
2411 (unsigned long long)smb_fname->st.st_ex_ino));
2412 return NT_STATUS_ACCESS_DENIED;
2415 if (!file_existed) {
2416 struct share_mode_entry *batch_entry = NULL;
2417 struct share_mode_entry *exclusive_entry = NULL;
2418 bool got_level2_oplock = false;
2419 bool got_a_none_oplock = false;
2420 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2423 * Deal with the race condition where two smbd's detect the
2424 * file doesn't exist and do the create at the same time. One
2425 * of them will win and set a share mode, the other (ie. this
2426 * one) should check if the requested share mode for this
2427 * create is allowed.
2431 * Now the file exists and fsp is successfully opened,
2432 * fsp->dev and fsp->inode are valid and should replace the
2433 * dev=0,inode=0 from a non existent file. Spotted by
2434 * Nadav Danieli <nadavd@exanet.com>. JRA.
2439 lck = get_share_mode_lock(talloc_tos(), id,
2441 smb_fname, &old_write_time);
2444 DEBUG(0, ("open_file_ntcreate: Could not get share "
2445 "mode lock for %s\n",
2446 smb_fname_str_dbg(smb_fname)));
2448 return NT_STATUS_SHARING_VIOLATION;
2451 /* Get the types we need to examine. */
2452 find_oplock_types(fsp,
2458 &got_a_none_oplock);
2460 /* First pass - send break only on batch oplocks. */
2461 if ((req != NULL) &&
2462 delay_for_batch_oplocks(fsp,
2466 schedule_defer_open(lck, request_time, req);
2469 return NT_STATUS_SHARING_VIOLATION;
2472 status = open_mode_check(conn, lck, fsp->name_hash,
2473 access_mask, share_access,
2474 create_options, &file_existed);
2476 if (NT_STATUS_IS_OK(status)) {
2477 /* We might be going to allow this open. Check oplock
2479 /* Second pass - send break for both batch or
2480 * exclusive oplocks. */
2481 if ((req != NULL) &&
2482 delay_for_exclusive_oplocks(
2487 schedule_defer_open(lck, request_time, req);
2490 return NT_STATUS_SHARING_VIOLATION;
2494 if (!NT_STATUS_IS_OK(status)) {
2495 struct deferred_open_record state;
2497 state.delayed_for_oplocks = False;
2498 state.async_open = false;
2501 /* Do it all over again immediately. In the second
2502 * round we will find that the file existed and handle
2503 * the DELETE_PENDING and FCB cases correctly. No need
2504 * to duplicate the code here. Essentially this is a
2505 * "goto top of this function", but don't tell
2509 defer_open(lck, request_time, timeval_zero(),
2517 grant_fsp_oplock_type(fsp,
2523 * We exit this block with the share entry *locked*.....
2528 SMB_ASSERT(lck != NULL);
2530 /* Delete streams if create_disposition requires it */
2531 if (!new_file_created && clear_ads(create_disposition) &&
2532 !is_ntfs_stream_smb_fname(smb_fname)) {
2533 status = delete_all_streams(conn, smb_fname->base_name);
2534 if (!NT_STATUS_IS_OK(status)) {
2541 /* note that we ignore failure for the following. It is
2542 basically a hack for NFS, and NFS will never set one of
2543 these only read them. Nobody but Samba can ever set a deny
2544 mode and we have already checked our more authoritative
2545 locking database for permission to set this deny mode. If
2546 the kernel refuses the operations then the kernel is wrong.
2547 note that GPFS supports it as well - jmcd */
2549 if (fsp->fh->fd != -1) {
2551 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2552 if(ret_flock == -1 ){
2557 return NT_STATUS_SHARING_VIOLATION;
2562 * At this point onwards, we can guarentee that the share entry
2563 * is locked, whether we created the file or not, and that the
2564 * deny mode is compatible with all current opens.
2568 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2569 * but we don't have to store this - just ignore it on access check.
2571 if (conn->sconn->using_smb2) {
2573 * SMB2 doesn't return it (according to Microsoft tests).
2574 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2575 * File created with access = 0x7 (Read, Write, Delete)
2576 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2578 fsp->access_mask = access_mask;
2580 /* But SMB1 does. */
2581 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2585 /* stat opens on existing files don't get oplocks. */
2586 if (is_stat_open(open_access_mask)) {
2587 fsp->oplock_type = NO_OPLOCK;
2591 if (new_file_created) {
2592 info = FILE_WAS_CREATED;
2594 if (flags2 & O_TRUNC) {
2595 info = FILE_WAS_OVERWRITTEN;
2597 info = FILE_WAS_OPENED;
2606 * Setup the oplock info in both the shared memory and
2610 status = set_file_oplock(fsp, fsp->oplock_type);
2611 if (!NT_STATUS_IS_OK(status)) {
2613 * Could not get the kernel oplock or there are byte-range
2614 * locks on the file.
2616 fsp->oplock_type = NO_OPLOCK;
2619 set_share_mode(lck, fsp, get_current_uid(conn),
2623 /* Handle strange delete on close create semantics. */
2624 if (create_options & FILE_DELETE_ON_CLOSE) {
2626 status = can_set_delete_on_close(fsp, new_dos_attributes);
2628 if (!NT_STATUS_IS_OK(status)) {
2629 /* Remember to delete the mode we just added. */
2630 del_share_mode(lck, fsp);
2635 /* Note that here we set the *inital* delete on close flag,
2636 not the regular one. The magic gets handled in close. */
2637 fsp->initial_delete_on_close = True;
2640 if (info != FILE_WAS_OPENED) {
2641 /* Files should be initially set as archive */
2642 if (lp_map_archive(SNUM(conn)) ||
2643 lp_store_dos_attributes(SNUM(conn))) {
2645 if (file_set_dosmode(conn, smb_fname,
2646 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2647 parent_dir, true) == 0) {
2648 unx_mode = smb_fname->st.st_ex_mode;
2654 /* Determine sparse flag. */
2656 /* POSIX opens are sparse by default. */
2657 fsp->is_sparse = true;
2659 fsp->is_sparse = (file_existed &&
2660 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2664 * Take care of inherited ACLs on created files - if default ACL not
2668 if (!posix_open && new_file_created && !def_acl) {
2670 int saved_errno = errno; /* We might get ENOSYS in the next
2673 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2675 errno = saved_errno; /* Ignore ENOSYS */
2678 } else if (new_unx_mode) {
2682 /* Attributes need changing. File already existed. */
2685 int saved_errno = errno; /* We might get ENOSYS in the
2687 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2689 if (ret == -1 && errno == ENOSYS) {
2690 errno = saved_errno; /* Ignore ENOSYS */
2692 DEBUG(5, ("open_file_ntcreate: reset "
2693 "attributes of file %s to 0%o\n",
2694 smb_fname_str_dbg(smb_fname),
2695 (unsigned int)new_unx_mode));
2696 ret = 0; /* Don't do the fchmod below. */
2701 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2702 DEBUG(5, ("open_file_ntcreate: failed to reset "
2703 "attributes of file %s to 0%o\n",
2704 smb_fname_str_dbg(smb_fname),
2705 (unsigned int)new_unx_mode));
2708 /* If this is a successful open, we must remove any deferred open
2711 del_deferred_open_entry(lck, req->mid,
2712 messaging_server_id(req->sconn->msg_ctx));
2716 return NT_STATUS_OK;
2720 /****************************************************************************
2721 Open a file for for write to ensure that we can fchmod it.
2722 ****************************************************************************/
2724 NTSTATUS open_file_fchmod(connection_struct *conn,
2725 struct smb_filename *smb_fname,
2726 files_struct **result)
2728 if (!VALID_STAT(smb_fname->st)) {
2729 return NT_STATUS_INVALID_PARAMETER;
2732 return SMB_VFS_CREATE_FILE(
2735 0, /* root_dir_fid */
2736 smb_fname, /* fname */
2737 FILE_WRITE_DATA, /* access_mask */
2738 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2740 FILE_OPEN, /* create_disposition*/
2741 0, /* create_options */
2742 0, /* file_attributes */
2743 INTERNAL_OPEN_ONLY, /* oplock_request */
2744 0, /* allocation_size */
2745 0, /* private_flags */
2748 result, /* result */
2752 static NTSTATUS mkdir_internal(connection_struct *conn,
2753 struct smb_filename *smb_dname,
2754 uint32 file_attributes)
2757 char *parent_dir = NULL;
2759 bool posix_open = false;
2760 bool need_re_stat = false;
2761 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2763 if(access_mask & ~(conn->share_access)) {
2764 DEBUG(5,("mkdir_internal: failing share access "
2765 "%s\n", lp_servicename(talloc_tos(), SNUM(conn))));
2766 return NT_STATUS_ACCESS_DENIED;
2769 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2771 return NT_STATUS_NO_MEMORY;
2774 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2776 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2778 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2781 status = check_parent_access(conn,
2784 if(!NT_STATUS_IS_OK(status)) {
2785 DEBUG(5,("mkdir_internal: check_parent_access "
2786 "on directory %s for path %s returned %s\n",
2788 smb_dname->base_name,
2789 nt_errstr(status) ));
2793 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2794 return map_nt_error_from_unix(errno);
2797 /* Ensure we're checking for a symlink here.... */
2798 /* We don't want to get caught by a symlink racer. */
2800 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2801 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2802 smb_fname_str_dbg(smb_dname), strerror(errno)));
2803 return map_nt_error_from_unix(errno);
2806 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2807 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2808 smb_fname_str_dbg(smb_dname)));
2809 return NT_STATUS_NOT_A_DIRECTORY;
2812 if (lp_store_dos_attributes(SNUM(conn))) {
2814 file_set_dosmode(conn, smb_dname,
2815 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2820 if (lp_inherit_perms(SNUM(conn))) {
2821 inherit_access_posix_acl(conn, parent_dir,
2822 smb_dname->base_name, mode);
2823 need_re_stat = true;
2828 * Check if high bits should have been set,
2829 * then (if bits are missing): add them.
2830 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2833 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2834 (mode & ~smb_dname->st.st_ex_mode)) {
2835 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2836 (smb_dname->st.st_ex_mode |
2837 (mode & ~smb_dname->st.st_ex_mode)));
2838 need_re_stat = true;
2842 /* Change the owner if required. */
2843 if (lp_inherit_owner(SNUM(conn))) {
2844 change_dir_owner_to_parent(conn, parent_dir,
2845 smb_dname->base_name,
2847 need_re_stat = true;
2851 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2852 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2853 smb_fname_str_dbg(smb_dname), strerror(errno)));
2854 return map_nt_error_from_unix(errno);
2858 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2859 smb_dname->base_name);
2861 return NT_STATUS_OK;
2864 /****************************************************************************
2865 Open a directory from an NT SMB call.
2866 ****************************************************************************/
2868 static NTSTATUS open_directory(connection_struct *conn,
2869 struct smb_request *req,
2870 struct smb_filename *smb_dname,
2872 uint32 share_access,
2873 uint32 create_disposition,
2874 uint32 create_options,
2875 uint32 file_attributes,
2877 files_struct **result)
2879 files_struct *fsp = NULL;
2880 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2881 struct share_mode_lock *lck = NULL;
2883 struct timespec mtimespec;
2886 if (is_ntfs_stream_smb_fname(smb_dname)) {
2887 DEBUG(2, ("open_directory: %s is a stream name!\n",
2888 smb_fname_str_dbg(smb_dname)));
2889 return NT_STATUS_NOT_A_DIRECTORY;
2892 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2893 /* Ensure we have a directory attribute. */
2894 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2897 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2898 "share_access = 0x%x create_options = 0x%x, "
2899 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2900 smb_fname_str_dbg(smb_dname),
2901 (unsigned int)access_mask,
2902 (unsigned int)share_access,
2903 (unsigned int)create_options,
2904 (unsigned int)create_disposition,
2905 (unsigned int)file_attributes));
2907 status = smbd_calculate_access_mask(conn, smb_dname,
2908 access_mask, &access_mask);
2909 if (!NT_STATUS_IS_OK(status)) {
2910 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2911 "on file %s returned %s\n",
2912 smb_fname_str_dbg(smb_dname),
2913 nt_errstr(status)));
2917 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2918 !security_token_has_privilege(get_current_nttok(conn),
2919 SEC_PRIV_SECURITY)) {
2920 DEBUG(10, ("open_directory: open on %s "
2921 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2922 smb_fname_str_dbg(smb_dname)));
2923 return NT_STATUS_PRIVILEGE_NOT_HELD;
2926 switch( create_disposition ) {
2930 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2933 info = FILE_WAS_OPENED;
2938 /* If directory exists error. If directory doesn't
2942 status = NT_STATUS_OBJECT_NAME_COLLISION;
2943 DEBUG(2, ("open_directory: unable to create "
2944 "%s. Error was %s\n",
2945 smb_fname_str_dbg(smb_dname),
2946 nt_errstr(status)));
2950 status = mkdir_internal(conn, smb_dname,
2953 if (!NT_STATUS_IS_OK(status)) {
2954 DEBUG(2, ("open_directory: unable to create "
2955 "%s. Error was %s\n",
2956 smb_fname_str_dbg(smb_dname),
2957 nt_errstr(status)));
2961 info = FILE_WAS_CREATED;
2966 * If directory exists open. If directory doesn't
2971 status = NT_STATUS_OK;
2972 info = FILE_WAS_OPENED;
2974 status = mkdir_internal(conn, smb_dname,
2977 if (NT_STATUS_IS_OK(status)) {
2978 info = FILE_WAS_CREATED;
2980 /* Cope with create race. */
2981 if (!NT_STATUS_EQUAL(status,
2982 NT_STATUS_OBJECT_NAME_COLLISION)) {
2983 DEBUG(2, ("open_directory: unable to create "
2984 "%s. Error was %s\n",
2985 smb_fname_str_dbg(smb_dname),
2986 nt_errstr(status)));
2989 info = FILE_WAS_OPENED;
2995 case FILE_SUPERSEDE:
2996 case FILE_OVERWRITE:
2997 case FILE_OVERWRITE_IF:
2999 DEBUG(5,("open_directory: invalid create_disposition "
3000 "0x%x for directory %s\n",
3001 (unsigned int)create_disposition,
3002 smb_fname_str_dbg(smb_dname)));
3003 return NT_STATUS_INVALID_PARAMETER;
3006 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
3007 DEBUG(5,("open_directory: %s is not a directory !\n",
3008 smb_fname_str_dbg(smb_dname)));
3009 return NT_STATUS_NOT_A_DIRECTORY;
3012 if (info == FILE_WAS_OPENED) {
3013 status = smbd_check_access_rights(conn, smb_dname, access_mask);
3014 if (!NT_STATUS_IS_OK(status)) {
3015 DEBUG(10, ("open_directory: smbd_check_access_rights on "
3016 "file %s failed with %s\n",
3017 smb_fname_str_dbg(smb_dname),
3018 nt_errstr(status)));
3023 status = file_new(req, conn, &fsp);
3024 if(!NT_STATUS_IS_OK(status)) {
3029 * Setup the files_struct for it.
3032 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
3033 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
3034 fsp->file_pid = req ? req->smbpid : 0;
3035 fsp->can_lock = False;
3036 fsp->can_read = False;
3037 fsp->can_write = False;
3039 fsp->share_access = share_access;
3040 fsp->fh->private_options = 0;
3042 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
3044 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3045 fsp->print_file = NULL;
3046 fsp->modified = False;
3047 fsp->oplock_type = NO_OPLOCK;
3048 fsp->sent_oplock_break = NO_BREAK_SENT;
3049 fsp->is_directory = True;
3050 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
3051 status = fsp_set_smb_fname(fsp, smb_dname);
3052 if (!NT_STATUS_IS_OK(status)) {
3053 file_free(req, fsp);
3057 mtimespec = smb_dname->st.st_ex_mtime;
3060 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
3062 /* POSIX allows us to open a directory with O_RDONLY. */
3063 status = fd_open(conn, fsp, O_RDONLY, 0);
3065 if (!NT_STATUS_IS_OK(status)) {
3066 DEBUG(5, ("open_directory: Could not open fd for "
3068 smb_fname_str_dbg(smb_dname),
3069 nt_errstr(status)));
3070 file_free(req, fsp);
3074 status = vfs_stat_fsp(fsp);
3075 if (!NT_STATUS_IS_OK(status)) {
3077 file_free(req, fsp);
3081 /* Ensure there was no race condition. */
3082 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
3083 DEBUG(5,("open_directory: stat struct differs for "
3085 smb_fname_str_dbg(smb_dname)));
3087 file_free(req, fsp);
3088 return NT_STATUS_ACCESS_DENIED;
3091 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
3092 conn->connectpath, smb_dname,
3096 DEBUG(0, ("open_directory: Could not get share mode lock for "
3097 "%s\n", smb_fname_str_dbg(smb_dname)));
3099 file_free(req, fsp);
3100 return NT_STATUS_SHARING_VIOLATION;
3103 status = open_mode_check(conn, lck, fsp->name_hash,
3104 access_mask, share_access,
3105 create_options, &dir_existed);
3107 if (!NT_STATUS_IS_OK(status)) {
3110 file_free(req, fsp);
3114 set_share_mode(lck, fsp, get_current_uid(conn),
3115 req ? req->mid : 0, NO_OPLOCK);
3117 /* For directories the delete on close bit at open time seems
3118 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
3119 if (create_options & FILE_DELETE_ON_CLOSE) {
3120 status = can_set_delete_on_close(fsp, 0);
3121 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
3124 file_free(req, fsp);
3128 if (NT_STATUS_IS_OK(status)) {
3129 /* Note that here we set the *inital* delete on close flag,
3130 not the regular one. The magic gets handled in close. */
3131 fsp->initial_delete_on_close = True;
3142 return NT_STATUS_OK;
3145 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
3146 struct smb_filename *smb_dname)
3151 status = SMB_VFS_CREATE_FILE(
3154 0, /* root_dir_fid */
3155 smb_dname, /* fname */
3156 FILE_READ_ATTRIBUTES, /* access_mask */
3157 FILE_SHARE_NONE, /* share_access */
3158 FILE_CREATE, /* create_disposition*/
3159 FILE_DIRECTORY_FILE, /* create_options */
3160 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
3161 0, /* oplock_request */
3162 0, /* allocation_size */
3163 0, /* private_flags */
3169 if (NT_STATUS_IS_OK(status)) {
3170 close_file(req, fsp, NORMAL_CLOSE);
3176 /****************************************************************************
3177 Receive notification that one of our open files has been renamed by another
3179 ****************************************************************************/
3181 void msg_file_was_renamed(struct messaging_context *msg,
3184 struct server_id server_id,
3188 char *frm = (char *)data->data;
3190 const char *sharepath;
3191 const char *base_name;
3192 const char *stream_name;
3193 struct smb_filename *smb_fname = NULL;
3194 size_t sp_len, bn_len;
3196 struct smbd_server_connection *sconn =
3197 talloc_get_type_abort(private_data,
3198 struct smbd_server_connection);
3200 if (data->data == NULL
3201 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3202 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3203 (int)data->length));
3207 /* Unpack the message. */
3208 pull_file_id_24(frm, &id);
3209 sharepath = &frm[24];
3210 sp_len = strlen(sharepath);
3211 base_name = sharepath + sp_len + 1;
3212 bn_len = strlen(base_name);
3213 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3215 /* stream_name must always be NULL if there is no stream. */
3216 if (stream_name[0] == '\0') {
3220 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3221 stream_name, NULL, &smb_fname);
3222 if (!NT_STATUS_IS_OK(status)) {
3226 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3228 sharepath, smb_fname_str_dbg(smb_fname),
3229 file_id_string_tos(&id)));
3231 for(fsp = file_find_di_first(sconn, id); fsp;
3232 fsp = file_find_di_next(fsp)) {
3233 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3235 DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
3236 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
3237 smb_fname_str_dbg(smb_fname)));
3238 status = fsp_set_smb_fname(fsp, smb_fname);
3239 if (!NT_STATUS_IS_OK(status)) {
3244 /* Now we have the complete path we can work out if this is
3245 actually within this share and adjust newname accordingly. */
3246 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3247 "not sharepath %s) "
3248 "%s from %s -> %s\n",
3249 fsp->conn->connectpath,
3253 smb_fname_str_dbg(smb_fname)));
3257 TALLOC_FREE(smb_fname);
3262 * If a main file is opened for delete, all streams need to be checked for
3263 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3264 * If that works, delete them all by setting the delete on close and close.
3267 NTSTATUS open_streams_for_delete(connection_struct *conn,
3270 struct stream_struct *stream_info = NULL;
3271 files_struct **streams = NULL;
3273 unsigned int num_streams = 0;
3274 TALLOC_CTX *frame = talloc_stackframe();
3277 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3278 &num_streams, &stream_info);
3280 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3281 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3282 DEBUG(10, ("no streams around\n"));
3284 return NT_STATUS_OK;
3287 if (!NT_STATUS_IS_OK(status)) {
3288 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3289 nt_errstr(status)));
3293 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3296 if (num_streams == 0) {
3298 return NT_STATUS_OK;
3301 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3302 if (streams == NULL) {
3303 DEBUG(0, ("talloc failed\n"));
3304 status = NT_STATUS_NO_MEMORY;
3308 for (i=0; i<num_streams; i++) {
3309 struct smb_filename *smb_fname = NULL;
3311 if (strequal(stream_info[i].name, "::$DATA")) {
3316 status = create_synthetic_smb_fname(talloc_tos(), fname,
3317 stream_info[i].name,
3319 if (!NT_STATUS_IS_OK(status)) {
3323 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3324 DEBUG(10, ("Unable to stat stream: %s\n",
3325 smb_fname_str_dbg(smb_fname)));
3328 status = SMB_VFS_CREATE_FILE(
3331 0, /* root_dir_fid */
3332 smb_fname, /* fname */
3333 DELETE_ACCESS, /* access_mask */
3334 (FILE_SHARE_READ | /* share_access */
3335 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3336 FILE_OPEN, /* create_disposition*/
3337 0, /* create_options */
3338 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3339 0, /* oplock_request */
3340 0, /* allocation_size */
3341 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3344 &streams[i], /* result */
3347 if (!NT_STATUS_IS_OK(status)) {
3348 DEBUG(10, ("Could not open stream %s: %s\n",
3349 smb_fname_str_dbg(smb_fname),
3350 nt_errstr(status)));
3352 TALLOC_FREE(smb_fname);
3355 TALLOC_FREE(smb_fname);
3359 * don't touch the variable "status" beyond this point :-)
3362 for (i -= 1 ; i >= 0; i--) {
3363 if (streams[i] == NULL) {
3367 DEBUG(10, ("Closing stream # %d, %s\n", i,
3368 fsp_str_dbg(streams[i])));
3369 close_file(NULL, streams[i], NORMAL_CLOSE);
3377 /*********************************************************************
3378 Create a default ACL by inheriting from the parent. If no inheritance
3379 from the parent available, don't set anything. This will leave the actual
3380 permissions the new file or directory already got from the filesystem
3381 as the NT ACL when read.
3382 *********************************************************************/
3384 static NTSTATUS inherit_new_acl(files_struct *fsp)
3386 TALLOC_CTX *ctx = talloc_tos();
3387 char *parent_name = NULL;
3388 struct security_descriptor *parent_desc = NULL;
3389 NTSTATUS status = NT_STATUS_OK;
3390 struct security_descriptor *psd = NULL;
3391 struct dom_sid *owner_sid = NULL;
3392 struct dom_sid *group_sid = NULL;
3393 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3394 bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3395 bool inheritable_components = false;
3398 if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3399 return NT_STATUS_NO_MEMORY;
3402 status = SMB_VFS_GET_NT_ACL(fsp->conn,
3404 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3406 if (!NT_STATUS_IS_OK(status)) {
3410 inheritable_components = sd_has_inheritable_components(parent_desc,
3413 if (!inheritable_components && !inherit_owner) {
3414 /* Nothing to inherit and not setting owner. */
3415 return NT_STATUS_OK;
3418 /* Create an inherited descriptor from the parent. */
3420 if (DEBUGLEVEL >= 10) {
3421 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3422 fsp_str_dbg(fsp) ));
3423 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3426 /* Inherit from parent descriptor if "inherit owner" set. */
3427 if (inherit_owner) {
3428 owner_sid = parent_desc->owner_sid;
3429 group_sid = parent_desc->group_sid;
3432 if (owner_sid == NULL) {
3433 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3435 if (group_sid == NULL) {
3436 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3439 status = se_create_child_secdesc(ctx,
3446 if (!NT_STATUS_IS_OK(status)) {
3450 /* If inheritable_components == false,
3451 se_create_child_secdesc()
3452 creates a security desriptor with a NULL dacl
3453 entry, but with SEC_DESC_DACL_PRESENT. We need
3454 to remove that flag. */
3456 if (!inheritable_components) {
3457 security_info_sent &= ~SECINFO_DACL;
3458 psd->type &= ~SEC_DESC_DACL_PRESENT;
3461 if (DEBUGLEVEL >= 10) {
3462 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3463 fsp_str_dbg(fsp) ));
3464 NDR_PRINT_DEBUG(security_descriptor, psd);
3467 if (inherit_owner) {
3468 /* We need to be root to force this. */
3471 status = SMB_VFS_FSET_NT_ACL(fsp,
3474 if (inherit_owner) {
3481 * Wrapper around open_file_ntcreate and open_directory
3484 static NTSTATUS create_file_unixpath(connection_struct *conn,
3485 struct smb_request *req,
3486 struct smb_filename *smb_fname,
3487 uint32_t access_mask,
3488 uint32_t share_access,
3489 uint32_t create_disposition,
3490 uint32_t create_options,
3491 uint32_t file_attributes,
3492 uint32_t oplock_request,
3493 uint64_t allocation_size,
3494 uint32_t private_flags,
3495 struct security_descriptor *sd,
3496 struct ea_list *ea_list,
3498 files_struct **result,
3501 int info = FILE_WAS_OPENED;
3502 files_struct *base_fsp = NULL;
3503 files_struct *fsp = NULL;
3506 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3507 "file_attributes = 0x%x, share_access = 0x%x, "
3508 "create_disposition = 0x%x create_options = 0x%x "
3509 "oplock_request = 0x%x private_flags = 0x%x "
3510 "ea_list = 0x%p, sd = 0x%p, "
3512 (unsigned int)access_mask,
3513 (unsigned int)file_attributes,
3514 (unsigned int)share_access,
3515 (unsigned int)create_disposition,
3516 (unsigned int)create_options,
3517 (unsigned int)oplock_request,
3518 (unsigned int)private_flags,
3519 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3521 if (create_options & FILE_OPEN_BY_FILE_ID) {
3522 status = NT_STATUS_NOT_SUPPORTED;
3526 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3527 status = NT_STATUS_INVALID_PARAMETER;
3532 oplock_request |= INTERNAL_OPEN_ONLY;
3535 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3536 && (access_mask & DELETE_ACCESS)
3537 && !is_ntfs_stream_smb_fname(smb_fname)) {
3539 * We can't open a file with DELETE access if any of the
3540 * streams is open without FILE_SHARE_DELETE
3542 status = open_streams_for_delete(conn, smb_fname->base_name);
3544 if (!NT_STATUS_IS_OK(status)) {
3549 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3550 !security_token_has_privilege(get_current_nttok(conn),
3551 SEC_PRIV_SECURITY)) {
3552 DEBUG(10, ("create_file_unixpath: open on %s "
3553 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3554 smb_fname_str_dbg(smb_fname)));
3555 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3559 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3560 && is_ntfs_stream_smb_fname(smb_fname)
3561 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3562 uint32 base_create_disposition;
3563 struct smb_filename *smb_fname_base = NULL;
3565 if (create_options & FILE_DIRECTORY_FILE) {
3566 status = NT_STATUS_NOT_A_DIRECTORY;
3570 switch (create_disposition) {
3572 base_create_disposition = FILE_OPEN;
3575 base_create_disposition = FILE_OPEN_IF;
3579 /* Create an smb_filename with stream_name == NULL. */
3580 status = create_synthetic_smb_fname(talloc_tos(),
3581 smb_fname->base_name,
3584 if (!NT_STATUS_IS_OK(status)) {
3588 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3589 DEBUG(10, ("Unable to stat stream: %s\n",
3590 smb_fname_str_dbg(smb_fname_base)));
3593 /* Open the base file. */
3594 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3597 | FILE_SHARE_DELETE,
3598 base_create_disposition,
3599 0, 0, 0, 0, 0, NULL, NULL,
3601 TALLOC_FREE(smb_fname_base);
3603 if (!NT_STATUS_IS_OK(status)) {
3604 DEBUG(10, ("create_file_unixpath for base %s failed: "
3605 "%s\n", smb_fname->base_name,
3606 nt_errstr(status)));
3609 /* we don't need to low level fd */
3614 * If it's a request for a directory open, deal with it separately.
3617 if (create_options & FILE_DIRECTORY_FILE) {
3619 if (create_options & FILE_NON_DIRECTORY_FILE) {
3620 status = NT_STATUS_INVALID_PARAMETER;
3624 /* Can't open a temp directory. IFS kit test. */
3625 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3626 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3627 status = NT_STATUS_INVALID_PARAMETER;
3632 * We will get a create directory here if the Win32
3633 * app specified a security descriptor in the
3634 * CreateDirectory() call.
3638 status = open_directory(
3639 conn, req, smb_fname, access_mask, share_access,
3640 create_disposition, create_options, file_attributes,
3645 * Ordinary file case.
3648 status = file_new(req, conn, &fsp);
3649 if(!NT_STATUS_IS_OK(status)) {
3653 status = fsp_set_smb_fname(fsp, smb_fname);
3654 if (!NT_STATUS_IS_OK(status)) {
3660 * We're opening the stream element of a
3661 * base_fsp we already opened. Set up the
3664 fsp->base_fsp = base_fsp;
3667 if (allocation_size) {
3668 fsp->initial_allocation_size = smb_roundup(fsp->conn,
3672 status = open_file_ntcreate(conn,
3684 if(!NT_STATUS_IS_OK(status)) {
3685 file_free(req, fsp);
3689 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3691 /* A stream open never opens a directory */
3694 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3699 * Fail the open if it was explicitly a non-directory
3703 if (create_options & FILE_NON_DIRECTORY_FILE) {
3704 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3709 status = open_directory(
3710 conn, req, smb_fname, access_mask,
3711 share_access, create_disposition,
3712 create_options, file_attributes,
3717 if (!NT_STATUS_IS_OK(status)) {
3721 fsp->base_fsp = base_fsp;
3723 if ((ea_list != NULL) &&
3724 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3725 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3726 if (!NT_STATUS_IS_OK(status)) {
3731 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3732 status = NT_STATUS_ACCESS_DENIED;
3736 /* Save the requested allocation size. */
3737 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3739 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3740 fsp->initial_allocation_size = smb_roundup(
3741 fsp->conn, allocation_size);
3742 if (fsp->is_directory) {
3743 /* Can't set allocation size on a directory. */
3744 status = NT_STATUS_ACCESS_DENIED;
3747 if (vfs_allocate_file_space(
3748 fsp, fsp->initial_allocation_size) == -1) {
3749 status = NT_STATUS_DISK_FULL;
3753 fsp->initial_allocation_size = smb_roundup(
3754 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3757 fsp->initial_allocation_size = 0;
3760 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3761 fsp->base_fsp == NULL) {
3764 * According to the MS documentation, the only time the security
3765 * descriptor is applied to the opened file is iff we *created* the
3766 * file; an existing file stays the same.
3768 * Also, it seems (from observation) that you can open the file with
3769 * any access mask but you can still write the sd. We need to override
3770 * the granted access before we call set_sd
3771 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3774 uint32_t sec_info_sent;
3775 uint32_t saved_access_mask = fsp->access_mask;
3777 sec_info_sent = get_sec_info(sd);
3779 fsp->access_mask = FILE_GENERIC_ALL;
3781 if (sec_info_sent & (SECINFO_OWNER|
3785 status = set_sd(fsp, sd, sec_info_sent);
3788 fsp->access_mask = saved_access_mask;
3790 if (!NT_STATUS_IS_OK(status)) {
3793 } else if (lp_inherit_acls(SNUM(conn))) {
3794 /* Inherit from parent. Errors here are not fatal. */
3795 status = inherit_new_acl(fsp);
3796 if (!NT_STATUS_IS_OK(status)) {
3797 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3799 nt_errstr(status) ));
3804 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3807 if (pinfo != NULL) {
3811 smb_fname->st = fsp->fsp_name->st;
3813 return NT_STATUS_OK;
3816 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3819 if (base_fsp && fsp->base_fsp == base_fsp) {
3821 * The close_file below will close
3826 close_file(req, fsp, ERROR_CLOSE);
3829 if (base_fsp != NULL) {
3830 close_file(req, base_fsp, ERROR_CLOSE);
3837 * Calculate the full path name given a relative fid.
3839 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3840 struct smb_request *req,
3841 uint16_t root_dir_fid,
3842 const struct smb_filename *smb_fname,
3843 struct smb_filename **smb_fname_out)
3845 files_struct *dir_fsp;
3846 char *parent_fname = NULL;
3847 char *new_base_name = NULL;
3850 if (root_dir_fid == 0 || !smb_fname) {
3851 status = NT_STATUS_INTERNAL_ERROR;
3855 dir_fsp = file_fsp(req, root_dir_fid);
3857 if (dir_fsp == NULL) {
3858 status = NT_STATUS_INVALID_HANDLE;
3862 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3863 status = NT_STATUS_INVALID_HANDLE;
3867 if (!dir_fsp->is_directory) {
3870 * Check to see if this is a mac fork of some kind.
3873 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3874 is_ntfs_stream_smb_fname(smb_fname)) {
3875 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3880 we need to handle the case when we get a
3881 relative open relative to a file and the
3882 pathname is blank - this is a reopen!
3883 (hint from demyn plantenberg)
3886 status = NT_STATUS_INVALID_HANDLE;
3890 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3892 * We're at the toplevel dir, the final file name
3893 * must not contain ./, as this is filtered out
3894 * normally by srvstr_get_path and unix_convert
3895 * explicitly rejects paths containing ./.
3897 parent_fname = talloc_strdup(talloc_tos(), "");
3898 if (parent_fname == NULL) {
3899 status = NT_STATUS_NO_MEMORY;
3903 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3906 * Copy in the base directory name.
3909 parent_fname = talloc_array(talloc_tos(), char,
3911 if (parent_fname == NULL) {
3912 status = NT_STATUS_NO_MEMORY;
3915 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3919 * Ensure it ends in a '/'.
3920 * We used TALLOC_SIZE +2 to add space for the '/'.
3924 && (parent_fname[dir_name_len-1] != '\\')
3925 && (parent_fname[dir_name_len-1] != '/')) {
3926 parent_fname[dir_name_len] = '/';
3927 parent_fname[dir_name_len+1] = '\0';
3931 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3932 smb_fname->base_name);
3933 if (new_base_name == NULL) {
3934 status = NT_STATUS_NO_MEMORY;
3938 status = filename_convert(req,
3940 req->flags2 & FLAGS2_DFS_PATHNAMES,
3945 if (!NT_STATUS_IS_OK(status)) {
3950 TALLOC_FREE(parent_fname);
3951 TALLOC_FREE(new_base_name);
3955 NTSTATUS create_file_default(connection_struct *conn,
3956 struct smb_request *req,
3957 uint16_t root_dir_fid,
3958 struct smb_filename *smb_fname,
3959 uint32_t access_mask,
3960 uint32_t share_access,
3961 uint32_t create_disposition,
3962 uint32_t create_options,
3963 uint32_t file_attributes,
3964 uint32_t oplock_request,
3965 uint64_t allocation_size,
3966 uint32_t private_flags,
3967 struct security_descriptor *sd,
3968 struct ea_list *ea_list,
3969 files_struct **result,
3972 int info = FILE_WAS_OPENED;
3973 files_struct *fsp = NULL;
3975 bool stream_name = false;
3977 DEBUG(10,("create_file: access_mask = 0x%x "
3978 "file_attributes = 0x%x, share_access = 0x%x, "
3979 "create_disposition = 0x%x create_options = 0x%x "
3980 "oplock_request = 0x%x "
3981 "private_flags = 0x%x "
3982 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3984 (unsigned int)access_mask,
3985 (unsigned int)file_attributes,
3986 (unsigned int)share_access,
3987 (unsigned int)create_disposition,
3988 (unsigned int)create_options,
3989 (unsigned int)oplock_request,
3990 (unsigned int)private_flags,
3991 (unsigned int)root_dir_fid,
3992 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3995 * Calculate the filename from the root_dir_if if necessary.
3998 if (root_dir_fid != 0) {
3999 struct smb_filename *smb_fname_out = NULL;
4000 status = get_relative_fid_filename(conn, req, root_dir_fid,
4001 smb_fname, &smb_fname_out);
4002 if (!NT_STATUS_IS_OK(status)) {
4005 smb_fname = smb_fname_out;
4009 * Check to see if this is a mac fork of some kind.
4012 stream_name = is_ntfs_stream_smb_fname(smb_fname);
4014 enum FAKE_FILE_TYPE fake_file_type;
4016 fake_file_type = is_fake_file(smb_fname);
4018 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
4021 * Here we go! support for changing the disk quotas
4024 * We need to fake up to open this MAGIC QUOTA file
4025 * and return a valid FID.
4027 * w2k close this file directly after openening xp
4028 * also tries a QUERY_FILE_INFO on the file and then
4031 status = open_fake_file(req, conn, req->vuid,
4032 fake_file_type, smb_fname,
4034 if (!NT_STATUS_IS_OK(status)) {
4038 ZERO_STRUCT(smb_fname->st);
4042 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
4043 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
4048 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
4050 smb_fname->stream_name = NULL;
4051 /* We have to handle this error here. */
4052 if (create_options & FILE_DIRECTORY_FILE) {
4053 status = NT_STATUS_NOT_A_DIRECTORY;
4056 if (lp_posix_pathnames()) {
4057 ret = SMB_VFS_LSTAT(conn, smb_fname);
4059 ret = SMB_VFS_STAT(conn, smb_fname);
4062 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
4063 status = NT_STATUS_FILE_IS_A_DIRECTORY;
4068 status = create_file_unixpath(
4069 conn, req, smb_fname, access_mask, share_access,
4070 create_disposition, create_options, file_attributes,
4071 oplock_request, allocation_size, private_flags,
4075 if (!NT_STATUS_IS_OK(status)) {
4080 DEBUG(10, ("create_file: info=%d\n", info));
4083 if (pinfo != NULL) {
4086 return NT_STATUS_OK;
4089 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
4092 close_file(req, fsp, ERROR_CLOSE);