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"
35 extern const struct generic_mapping file_generic_mapping;
37 struct deferred_open_record {
38 bool delayed_for_oplocks;
43 /****************************************************************************
44 If the requester wanted DELETE_ACCESS and was rejected because
45 the file ACL didn't include DELETE_ACCESS, see if the parent ACL
47 ****************************************************************************/
49 static bool parent_override_delete(connection_struct *conn,
50 const struct smb_filename *smb_fname,
52 uint32_t rejected_mask)
54 if ((access_mask & DELETE_ACCESS) &&
55 (rejected_mask & DELETE_ACCESS) &&
56 can_delete_file_in_directory(conn, smb_fname)) {
62 /****************************************************************************
63 Check if we have open rights.
64 ****************************************************************************/
66 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
67 const struct smb_filename *smb_fname,
71 /* Check if we have rights to open. */
73 struct security_descriptor *sd = NULL;
74 uint32_t rejected_share_access;
75 uint32_t rejected_mask = access_mask;
77 rejected_share_access = access_mask & ~(conn->share_access);
79 if (rejected_share_access) {
80 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
82 (unsigned int)access_mask,
83 smb_fname_str_dbg(smb_fname),
84 (unsigned int)rejected_share_access ));
85 return NT_STATUS_ACCESS_DENIED;
88 if (!use_privs && get_current_uid(conn) == (uid_t)0) {
89 /* I'm sorry sir, I didn't know you were root... */
90 DEBUG(10,("smbd_check_access_rights: root override "
91 "on %s. Granting 0x%x\n",
92 smb_fname_str_dbg(smb_fname),
93 (unsigned int)access_mask ));
97 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
98 DEBUG(10,("smbd_check_access_rights: not checking ACL "
99 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
100 smb_fname_str_dbg(smb_fname),
101 (unsigned int)access_mask ));
105 if (access_mask == DELETE_ACCESS &&
106 VALID_STAT(smb_fname->st) &&
107 S_ISLNK(smb_fname->st.st_ex_mode)) {
108 /* We can always delete a symlink. */
109 DEBUG(10,("smbd_check_access_rights: not checking ACL "
110 "on DELETE_ACCESS on symlink %s.\n",
111 smb_fname_str_dbg(smb_fname) ));
115 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
120 if (!NT_STATUS_IS_OK(status)) {
121 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
123 smb_fname_str_dbg(smb_fname),
126 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
134 * Never test FILE_READ_ATTRIBUTES. se_file_access_check() also takes care of
135 * owner WRITE_DAC and READ_CONTROL.
137 status = se_file_access_check(sd,
138 get_current_nttok(conn),
140 (access_mask & ~FILE_READ_ATTRIBUTES),
143 DEBUG(10,("smbd_check_access_rights: file %s requesting "
144 "0x%x returning 0x%x (%s)\n",
145 smb_fname_str_dbg(smb_fname),
146 (unsigned int)access_mask,
147 (unsigned int)rejected_mask,
148 nt_errstr(status) ));
150 if (!NT_STATUS_IS_OK(status)) {
151 if (DEBUGLEVEL >= 10) {
152 DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
153 smb_fname_str_dbg(smb_fname) ));
154 NDR_PRINT_DEBUG(security_descriptor, sd);
160 if (NT_STATUS_IS_OK(status) ||
161 !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
165 /* Here we know status == NT_STATUS_ACCESS_DENIED. */
169 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
170 (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
171 !lp_store_dos_attributes(SNUM(conn)) &&
172 (lp_map_readonly(SNUM(conn)) ||
173 lp_map_archive(SNUM(conn)) ||
174 lp_map_hidden(SNUM(conn)) ||
175 lp_map_system(SNUM(conn)))) {
176 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
178 DEBUG(10,("smbd_check_access_rights: "
180 "FILE_WRITE_ATTRIBUTES "
182 smb_fname_str_dbg(smb_fname)));
185 if (parent_override_delete(conn,
189 /* Were we trying to do an open
190 * for delete and didn't get DELETE
191 * access (only) ? Check if the
192 * directory allows DELETE_CHILD.
194 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
197 rejected_mask &= ~DELETE_ACCESS;
199 DEBUG(10,("smbd_check_access_rights: "
203 smb_fname_str_dbg(smb_fname)));
206 if (rejected_mask != 0) {
207 return NT_STATUS_ACCESS_DENIED;
212 static NTSTATUS check_parent_access(struct connection_struct *conn,
213 struct smb_filename *smb_fname,
214 uint32_t access_mask)
217 char *parent_dir = NULL;
218 struct security_descriptor *parent_sd = NULL;
219 uint32_t access_granted = 0;
221 if (!parent_dirname(talloc_tos(),
222 smb_fname->base_name,
225 return NT_STATUS_NO_MEMORY;
228 if (get_current_uid(conn) == (uid_t)0) {
229 /* I'm sorry sir, I didn't know you were root... */
230 DEBUG(10,("check_parent_access: root override "
231 "on %s. Granting 0x%x\n",
232 smb_fname_str_dbg(smb_fname),
233 (unsigned int)access_mask ));
237 status = SMB_VFS_GET_NT_ACL(conn,
242 if (!NT_STATUS_IS_OK(status)) {
243 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
244 "%s with error %s\n",
251 * Never test FILE_READ_ATTRIBUTES. se_file_access_check() also takes care of
252 * owner WRITE_DAC and READ_CONTROL.
254 status = se_file_access_check(parent_sd,
255 get_current_nttok(conn),
257 (access_mask & ~FILE_READ_ATTRIBUTES),
259 if(!NT_STATUS_IS_OK(status)) {
260 DEBUG(5,("check_parent_access: access check "
261 "on directory %s for "
262 "path %s for mask 0x%x returned (0x%x) %s\n",
264 smb_fname->base_name,
267 nt_errstr(status) ));
274 /****************************************************************************
275 fd support routines - attempt to do a dos_open.
276 ****************************************************************************/
278 NTSTATUS fd_open(struct connection_struct *conn,
283 struct smb_filename *smb_fname = fsp->fsp_name;
284 NTSTATUS status = NT_STATUS_OK;
288 * Never follow symlinks on a POSIX client. The
289 * client should be doing this.
292 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
297 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
298 if (fsp->fh->fd == -1) {
299 int posix_errno = errno;
301 #if defined(ENOTSUP) && defined(OSF1)
302 /* handle special Tru64 errno */
303 if (errno == ENOTSUP) {
308 /* fix broken NetBSD errno */
309 if (errno == EFTYPE) {
313 /* fix broken FreeBSD errno */
314 if (errno == EMLINK) {
317 #endif /* O_NOFOLLOW */
318 status = map_nt_error_from_unix(posix_errno);
319 if (errno == EMFILE) {
320 static time_t last_warned = 0L;
322 if (time((time_t *) NULL) > last_warned) {
323 DEBUG(0,("Too many open files, unable "
324 "to open more! smbd's max "
326 lp_max_open_files()));
327 last_warned = time((time_t *) NULL);
333 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
334 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
335 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
340 /****************************************************************************
341 Close the file associated with a fsp.
342 ****************************************************************************/
344 NTSTATUS fd_close(files_struct *fsp)
351 if (fsp->fh->fd == -1) {
352 return NT_STATUS_OK; /* What we used to call a stat open. */
354 if (fsp->fh->ref_count > 1) {
355 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
358 ret = SMB_VFS_CLOSE(fsp);
361 return map_nt_error_from_unix(errno);
366 /****************************************************************************
367 Change the ownership of a file to that of the parent directory.
368 Do this by fd if possible.
369 ****************************************************************************/
371 void change_file_owner_to_parent(connection_struct *conn,
372 const char *inherit_from_dir,
375 struct smb_filename *smb_fname_parent = NULL;
379 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
380 NULL, NULL, &smb_fname_parent);
381 if (!NT_STATUS_IS_OK(status)) {
385 ret = SMB_VFS_STAT(conn, smb_fname_parent);
387 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
388 "directory %s. Error was %s\n",
389 smb_fname_str_dbg(smb_fname_parent),
391 TALLOC_FREE(smb_fname_parent);
395 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
396 /* Already this uid - no need to change. */
397 DEBUG(10,("change_file_owner_to_parent: file %s "
398 "is already owned by uid %d\n",
400 (int)fsp->fsp_name->st.st_ex_uid ));
401 TALLOC_FREE(smb_fname_parent);
406 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
409 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
410 "file %s to parent directory uid %u. Error "
411 "was %s\n", fsp_str_dbg(fsp),
412 (unsigned int)smb_fname_parent->st.st_ex_uid,
415 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
416 "parent directory uid %u.\n", fsp_str_dbg(fsp),
417 (unsigned int)smb_fname_parent->st.st_ex_uid));
418 /* Ensure the uid entry is updated. */
419 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
422 TALLOC_FREE(smb_fname_parent);
425 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
426 const char *inherit_from_dir,
428 SMB_STRUCT_STAT *psbuf)
430 struct smb_filename *smb_fname_parent = NULL;
431 struct smb_filename *smb_fname_cwd = NULL;
432 char *saved_dir = NULL;
433 TALLOC_CTX *ctx = talloc_tos();
434 NTSTATUS status = NT_STATUS_OK;
437 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
439 if (!NT_STATUS_IS_OK(status)) {
443 ret = SMB_VFS_STAT(conn, smb_fname_parent);
445 status = map_nt_error_from_unix(errno);
446 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
447 "directory %s. Error was %s\n",
448 smb_fname_str_dbg(smb_fname_parent),
453 /* We've already done an lstat into psbuf, and we know it's a
454 directory. If we can cd into the directory and the dev/ino
455 are the same then we can safely chown without races as
456 we're locking the directory in place by being in it. This
457 should work on any UNIX (thanks tridge :-). JRA.
460 saved_dir = vfs_GetWd(ctx,conn);
462 status = map_nt_error_from_unix(errno);
463 DEBUG(0,("change_dir_owner_to_parent: failed to get "
464 "current working directory. Error was %s\n",
469 /* Chdir into the new path. */
470 if (vfs_ChDir(conn, fname) == -1) {
471 status = map_nt_error_from_unix(errno);
472 DEBUG(0,("change_dir_owner_to_parent: failed to change "
473 "current working directory to %s. Error "
474 "was %s\n", fname, strerror(errno) ));
478 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
480 if (!NT_STATUS_IS_OK(status)) {
484 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
486 status = map_nt_error_from_unix(errno);
487 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
488 "directory '.' (%s) Error was %s\n",
489 fname, strerror(errno)));
493 /* Ensure we're pointing at the same place. */
494 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
495 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
496 DEBUG(0,("change_dir_owner_to_parent: "
497 "device/inode on directory %s changed. "
498 "Refusing to chown !\n", fname ));
499 status = NT_STATUS_ACCESS_DENIED;
503 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
504 /* Already this uid - no need to change. */
505 DEBUG(10,("change_dir_owner_to_parent: directory %s "
506 "is already owned by uid %d\n",
508 (int)smb_fname_cwd->st.st_ex_uid ));
509 status = NT_STATUS_OK;
514 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
518 status = map_nt_error_from_unix(errno);
519 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
520 "directory %s to parent directory uid %u. "
521 "Error was %s\n", fname,
522 (unsigned int)smb_fname_parent->st.st_ex_uid,
525 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
526 "directory %s to parent directory uid %u.\n",
527 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
528 /* Ensure the uid entry is updated. */
529 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
533 vfs_ChDir(conn,saved_dir);
535 TALLOC_FREE(smb_fname_parent);
536 TALLOC_FREE(smb_fname_cwd);
540 /****************************************************************************
541 Open a file - returning a guaranteed ATOMIC indication of if the
542 file was created or not.
543 ****************************************************************************/
545 static NTSTATUS fd_open_atomic(struct connection_struct *conn,
551 NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
552 bool file_existed = VALID_STAT(fsp->fsp_name->st);
554 *file_created = false;
556 if (!(flags & O_CREAT)) {
558 * We're not creating the file, just pass through.
560 return fd_open(conn, fsp, flags, mode);
563 if (flags & O_EXCL) {
565 * Fail if already exists, just pass through.
567 status = fd_open(conn, fsp, flags, mode);
570 * Here we've opened with O_CREAT|O_EXCL. If that went
571 * NT_STATUS_OK, we *know* we created this file.
573 *file_created = NT_STATUS_IS_OK(status);
579 * Now it gets tricky. We have O_CREAT, but not O_EXCL.
580 * To know absolutely if we created the file or not,
581 * we can never call O_CREAT without O_EXCL. So if
582 * we think the file existed, try without O_CREAT|O_EXCL.
583 * If we think the file didn't exist, try with
584 * O_CREAT|O_EXCL. Keep bouncing between these two
585 * requests until either the file is created, or
586 * opened. Either way, we keep going until we get
587 * a returnable result (error, or open/create).
591 int curr_flags = flags;
594 /* Just try open, do not create. */
595 curr_flags &= ~(O_CREAT);
596 status = fd_open(conn, fsp, curr_flags, mode);
597 if (NT_STATUS_EQUAL(status,
598 NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
600 * Someone deleted it in the meantime.
603 file_existed = false;
604 DEBUG(10,("fd_open_atomic: file %s existed. "
606 smb_fname_str_dbg(fsp->fsp_name)));
610 /* Try create exclusively, fail if it exists. */
611 curr_flags |= O_EXCL;
612 status = fd_open(conn, fsp, curr_flags, mode);
613 if (NT_STATUS_EQUAL(status,
614 NT_STATUS_OBJECT_NAME_COLLISION)) {
616 * Someone created it in the meantime.
617 * Retry without O_CREAT.
620 DEBUG(10,("fd_open_atomic: file %s "
621 "did not exist. Retry.\n",
622 smb_fname_str_dbg(fsp->fsp_name)));
625 if (NT_STATUS_IS_OK(status)) {
627 * Here we've opened with O_CREAT|O_EXCL
628 * and got success. We *know* we created
631 *file_created = true;
634 /* Create is done, or failed. */
640 /****************************************************************************
642 ****************************************************************************/
644 static NTSTATUS open_file(files_struct *fsp,
645 connection_struct *conn,
646 struct smb_request *req,
647 const char *parent_dir,
650 uint32 access_mask, /* client requested access mask. */
651 uint32 open_access_mask, /* what we're actually using in the open. */
652 bool *p_file_created)
654 struct smb_filename *smb_fname = fsp->fsp_name;
655 NTSTATUS status = NT_STATUS_OK;
656 int accmode = (flags & O_ACCMODE);
657 int local_flags = flags;
658 bool file_existed = VALID_STAT(fsp->fsp_name->st);
663 /* Check permissions */
666 * This code was changed after seeing a client open request
667 * containing the open mode of (DENY_WRITE/read-only) with
668 * the 'create if not exist' bit set. The previous code
669 * would fail to open the file read only on a read-only share
670 * as it was checking the flags parameter directly against O_RDONLY,
671 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
675 if (!CAN_WRITE(conn)) {
676 /* It's a read-only share - fail if we wanted to write. */
677 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
678 DEBUG(3,("Permission denied opening %s\n",
679 smb_fname_str_dbg(smb_fname)));
680 return NT_STATUS_ACCESS_DENIED;
681 } else if(flags & O_CREAT) {
682 /* We don't want to write - but we must make sure that
683 O_CREAT doesn't create the file if we have write
684 access into the directory.
686 flags &= ~(O_CREAT|O_EXCL);
687 local_flags &= ~(O_CREAT|O_EXCL);
692 * This little piece of insanity is inspired by the
693 * fact that an NT client can open a file for O_RDONLY,
694 * but set the create disposition to FILE_EXISTS_TRUNCATE.
695 * If the client *can* write to the file, then it expects to
696 * truncate the file, even though it is opening for readonly.
697 * Quicken uses this stupid trick in backup file creation...
698 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
699 * for helping track this one down. It didn't bite us in 2.0.x
700 * as we always opened files read-write in that release. JRA.
703 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
704 DEBUG(10,("open_file: truncate requested on read-only open "
705 "for file %s\n", smb_fname_str_dbg(smb_fname)));
706 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
709 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
710 (!file_existed && (local_flags & O_CREAT)) ||
711 ((local_flags & O_TRUNC) == O_TRUNC) ) {
715 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
717 * We would block on opening a FIFO with no one else on the
718 * other end. Do what we used to do and add O_NONBLOCK to the
722 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
723 local_flags &= ~O_TRUNC; /* Can't truncate a FIFO. */
724 local_flags |= O_NONBLOCK;
728 /* Don't create files with Microsoft wildcard characters. */
731 * wildcard characters are allowed in stream names
732 * only test the basefilename
734 wild = fsp->base_fsp->fsp_name->base_name;
736 wild = smb_fname->base_name;
738 if ((local_flags & O_CREAT) && !file_existed &&
740 return NT_STATUS_OBJECT_NAME_INVALID;
743 /* Can we access this file ? */
744 if (!fsp->base_fsp) {
745 /* Only do this check on non-stream open. */
747 status = smbd_check_access_rights(conn,
751 } else if (local_flags & O_CREAT){
752 status = check_parent_access(conn,
756 /* File didn't exist and no O_CREAT. */
757 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
759 if (!NT_STATUS_IS_OK(status)) {
760 DEBUG(10,("open_file: "
764 "smbd_check_access_rights" :
765 "check_parent_access",
766 smb_fname_str_dbg(smb_fname),
767 nt_errstr(status) ));
772 /* Actually do the open */
773 status = fd_open_atomic(conn, fsp, local_flags,
774 unx_mode, p_file_created);
775 if (!NT_STATUS_IS_OK(status)) {
776 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
777 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
778 nt_errstr(status),local_flags,flags));
782 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
784 /* If we have an fd, this stat should succeed. */
785 DEBUG(0,("Error doing fstat on open file %s "
787 smb_fname_str_dbg(smb_fname),
789 status = map_nt_error_from_unix(errno);
794 if (*p_file_created) {
795 /* We created this file. */
797 bool need_re_stat = false;
798 /* Do all inheritance work after we've
799 done a successful fstat call and filled
800 in the stat struct in fsp->fsp_name. */
802 /* Inherit the ACL if required */
803 if (lp_inherit_perms(SNUM(conn))) {
804 inherit_access_posix_acl(conn, parent_dir,
805 smb_fname->base_name,
810 /* Change the owner if required. */
811 if (lp_inherit_owner(SNUM(conn))) {
812 change_file_owner_to_parent(conn, parent_dir,
818 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
819 /* If we have an fd, this stat should succeed. */
821 DEBUG(0,("Error doing fstat on open file %s "
823 smb_fname_str_dbg(smb_fname),
828 notify_fname(conn, NOTIFY_ACTION_ADDED,
829 FILE_NOTIFY_CHANGE_FILE_NAME,
830 smb_fname->base_name);
833 fsp->fh->fd = -1; /* What we used to call a stat open. */
835 /* File must exist for a stat open. */
836 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
839 status = smbd_check_access_rights(conn,
844 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
846 S_ISLNK(smb_fname->st.st_ex_mode)) {
847 /* This is a POSIX stat open for delete
848 * or rename on a symlink that points
850 DEBUG(10,("open_file: allowing POSIX "
851 "open on bad symlink %s\n",
852 smb_fname_str_dbg(smb_fname)));
853 status = NT_STATUS_OK;
856 if (!NT_STATUS_IS_OK(status)) {
857 DEBUG(10,("open_file: "
858 "smbd_check_access_rights on file "
860 smb_fname_str_dbg(smb_fname),
861 nt_errstr(status) ));
867 * POSIX allows read-only opens of directories. We don't
868 * want to do this (we use a different code path for this)
869 * so catch a directory open and return an EISDIR. JRA.
872 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
875 return NT_STATUS_FILE_IS_A_DIRECTORY;
878 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
879 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
880 fsp->file_pid = req ? req->smbpid : 0;
881 fsp->can_lock = True;
882 fsp->can_read = ((access_mask & FILE_READ_DATA) != 0);
885 ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0);
886 fsp->print_file = NULL;
887 fsp->modified = False;
888 fsp->sent_oplock_break = NO_BREAK_SENT;
889 fsp->is_directory = False;
890 if (conn->aio_write_behind_list &&
891 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
892 conn->case_sensitive)) {
893 fsp->aio_write_behind = True;
896 fsp->wcp = NULL; /* Write cache pointer. */
898 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
899 conn->session_info->unix_info->unix_name,
900 smb_fname_str_dbg(smb_fname),
901 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
902 conn->num_files_open));
908 /****************************************************************************
909 Check if we can open a file with a share mode.
910 Returns True if conflict, False if not.
911 ****************************************************************************/
913 static bool share_conflict(struct share_mode_entry *entry,
917 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
918 "entry->share_access = 0x%x, "
919 "entry->private_options = 0x%x\n",
920 (unsigned int)entry->access_mask,
921 (unsigned int)entry->share_access,
922 (unsigned int)entry->private_options));
924 if (server_id_is_disconnected(&entry->pid)) {
926 * note: cleanup should have been done by
927 * delay_for_batch_oplocks()
932 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
933 (unsigned int)access_mask, (unsigned int)share_access));
935 if ((entry->access_mask & (FILE_WRITE_DATA|
939 DELETE_ACCESS)) == 0) {
940 DEBUG(10,("share_conflict: No conflict due to "
941 "entry->access_mask = 0x%x\n",
942 (unsigned int)entry->access_mask ));
946 if ((access_mask & (FILE_WRITE_DATA|
950 DELETE_ACCESS)) == 0) {
951 DEBUG(10,("share_conflict: No conflict due to "
952 "access_mask = 0x%x\n",
953 (unsigned int)access_mask ));
957 #if 1 /* JRA TEST - Superdebug. */
958 #define CHECK_MASK(num, am, right, sa, share) \
959 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
960 (unsigned int)(num), (unsigned int)(am), \
961 (unsigned int)(right), (unsigned int)(am)&(right) )); \
962 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
963 (unsigned int)(num), (unsigned int)(sa), \
964 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
965 if (((am) & (right)) && !((sa) & (share))) { \
966 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
967 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
968 (unsigned int)(share) )); \
972 #define CHECK_MASK(num, am, right, sa, share) \
973 if (((am) & (right)) && !((sa) & (share))) { \
974 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
975 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
976 (unsigned int)(share) )); \
981 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
982 share_access, FILE_SHARE_WRITE);
983 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
984 entry->share_access, FILE_SHARE_WRITE);
986 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
987 share_access, FILE_SHARE_READ);
988 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
989 entry->share_access, FILE_SHARE_READ);
991 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
992 share_access, FILE_SHARE_DELETE);
993 CHECK_MASK(6, access_mask, DELETE_ACCESS,
994 entry->share_access, FILE_SHARE_DELETE);
996 DEBUG(10,("share_conflict: No conflict.\n"));
1000 #if defined(DEVELOPER)
1001 static void validate_my_share_entries(struct smbd_server_connection *sconn,
1003 struct share_mode_entry *share_entry)
1005 struct server_id self = messaging_server_id(sconn->msg_ctx);
1008 if (!serverid_equal(&self, &share_entry->pid)) {
1012 if (is_deferred_open_entry(share_entry) &&
1013 !open_was_deferred(sconn, share_entry->op_mid)) {
1014 char *str = talloc_asprintf(talloc_tos(),
1015 "Got a deferred entry without a request: "
1017 share_mode_str(talloc_tos(), num, share_entry));
1021 if (!is_valid_share_mode_entry(share_entry)) {
1025 fsp = file_find_dif(sconn, share_entry->id,
1026 share_entry->share_file_id);
1028 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1029 share_mode_str(talloc_tos(), num, share_entry) ));
1030 smb_panic("validate_my_share_entries: Cannot match a "
1031 "share entry with an open file\n");
1034 if (is_deferred_open_entry(share_entry)) {
1038 if ((share_entry->op_type == NO_OPLOCK) &&
1039 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
1040 /* Someone has already written to it, but I haven't yet
1045 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
1054 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1055 share_mode_str(talloc_tos(), num, share_entry) ));
1056 str = talloc_asprintf(talloc_tos(),
1057 "validate_my_share_entries: "
1058 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
1059 fsp->fsp_name->base_name,
1060 (unsigned int)fsp->oplock_type,
1061 (unsigned int)share_entry->op_type );
1067 bool is_stat_open(uint32 access_mask)
1069 return (access_mask &&
1070 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
1071 FILE_WRITE_ATTRIBUTES))==0) &&
1072 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
1073 FILE_WRITE_ATTRIBUTES)) != 0));
1076 /****************************************************************************
1077 Deal with share modes
1078 Invarient: Share mode must be locked on entry and exit.
1079 Returns -1 on error, or number of share modes on success (may be zero).
1080 ****************************************************************************/
1082 static NTSTATUS open_mode_check(connection_struct *conn,
1083 struct share_mode_lock *lck,
1086 uint32 share_access,
1087 uint32 create_options,
1092 if(lck->data->num_share_modes == 0) {
1093 return NT_STATUS_OK;
1096 /* A delete on close prohibits everything */
1098 if (is_delete_on_close_set(lck, name_hash)) {
1100 * Check the delete on close token
1101 * is valid. It could have been left
1102 * after a server crash.
1104 for(i = 0; i < lck->data->num_share_modes; i++) {
1105 if (!share_mode_stale_pid(lck->data, i)) {
1107 *file_existed = true;
1109 return NT_STATUS_DELETE_PENDING;
1112 return NT_STATUS_OK;
1115 if (is_stat_open(access_mask)) {
1116 /* Stat open that doesn't trigger oplock breaks or share mode
1117 * checks... ! JRA. */
1118 return NT_STATUS_OK;
1122 * Check if the share modes will give us access.
1125 #if defined(DEVELOPER)
1126 for(i = 0; i < lck->data->num_share_modes; i++) {
1127 validate_my_share_entries(conn->sconn, i,
1128 &lck->data->share_modes[i]);
1132 /* Now we check the share modes, after any oplock breaks. */
1133 for(i = 0; i < lck->data->num_share_modes; i++) {
1135 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1139 /* someone else has a share lock on it, check to see if we can
1141 if (share_conflict(&lck->data->share_modes[i],
1142 access_mask, share_access)) {
1144 if (share_mode_stale_pid(lck->data, i)) {
1148 *file_existed = true;
1150 return NT_STATUS_SHARING_VIOLATION;
1154 if (lck->data->num_share_modes != 0) {
1155 *file_existed = true;
1158 return NT_STATUS_OK;
1162 * Send a break message to the oplock holder and delay the open for
1166 static NTSTATUS send_break_message(files_struct *fsp,
1167 struct share_mode_entry *exclusive,
1172 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1174 DEBUG(10, ("Sending break request to PID %s\n",
1175 procid_str_static(&exclusive->pid)));
1176 exclusive->op_mid = mid;
1178 /* Create the message. */
1179 share_mode_entry_to_message(msg, exclusive);
1181 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1182 don't want this set in the share mode struct pointed to by lck. */
1184 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1185 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1186 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1189 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1190 MSG_SMB_BREAK_REQUEST,
1192 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1193 if (!NT_STATUS_IS_OK(status)) {
1194 DEBUG(3, ("Could not send oplock break message: %s\n",
1195 nt_errstr(status)));
1202 * Return share_mode_entry pointers for :
1203 * 1). Batch oplock entry.
1204 * 2). Batch or exclusive oplock entry (may be identical to #1).
1205 * bool have_level2_oplock
1206 * bool have_no_oplock.
1207 * Do internal consistency checks on the share mode for a file.
1210 static void find_oplock_types(files_struct *fsp,
1212 const struct share_mode_lock *lck,
1213 struct share_mode_entry **pp_batch,
1214 struct share_mode_entry **pp_ex_or_batch,
1216 bool *got_no_oplock)
1221 *pp_ex_or_batch = NULL;
1222 *got_level2 = false;
1223 *got_no_oplock = false;
1225 /* Ignore stat or internal opens, as is done in
1226 delay_for_batch_oplocks() and
1227 delay_for_exclusive_oplocks().
1229 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1233 for (i=0; i<lck->data->num_share_modes; i++) {
1234 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1238 if (lck->data->share_modes[i].op_type == NO_OPLOCK &&
1239 is_stat_open(lck->data->share_modes[i].access_mask)) {
1240 /* We ignore stat opens in the table - they
1241 always have NO_OPLOCK and never get or
1242 cause breaks. JRA. */
1246 if (BATCH_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1247 /* batch - can only be one. */
1248 if (share_mode_stale_pid(lck->data, i)) {
1249 DEBUG(10, ("Found stale batch oplock\n"));
1252 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1253 smb_panic("Bad batch oplock entry.");
1255 *pp_batch = &lck->data->share_modes[i];
1258 if (EXCLUSIVE_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1259 if (share_mode_stale_pid(lck->data, i)) {
1260 DEBUG(10, ("Found stale duplicate oplock\n"));
1263 /* Exclusive or batch - can only be one. */
1264 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1265 smb_panic("Bad exclusive or batch oplock entry.");
1267 *pp_ex_or_batch = &lck->data->share_modes[i];
1270 if (LEVEL_II_OPLOCK_TYPE(lck->data->share_modes[i].op_type)) {
1271 if (*pp_batch || *pp_ex_or_batch) {
1272 if (share_mode_stale_pid(lck->data, i)) {
1273 DEBUG(10, ("Found stale LevelII "
1277 smb_panic("Bad levelII oplock entry.");
1282 if (lck->data->share_modes[i].op_type == NO_OPLOCK) {
1283 if (*pp_batch || *pp_ex_or_batch) {
1284 if (share_mode_stale_pid(lck->data, i)) {
1285 DEBUG(10, ("Found stale NO_OPLOCK "
1289 smb_panic("Bad no oplock entry.");
1291 *got_no_oplock = true;
1296 static bool delay_for_batch_oplocks(files_struct *fsp,
1299 struct share_mode_entry *batch_entry)
1301 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1304 if (batch_entry == NULL) {
1308 if (server_id_is_disconnected(&batch_entry->pid)) {
1311 * This could be achieved by sending a break message
1312 * to ourselves. Special considerations for files
1313 * with delete_on_close flag set!
1315 * For now we keep it simple and do not
1316 * allow delete on close for durable handles.
1321 /* Found a batch oplock */
1322 send_break_message(fsp, batch_entry, mid, oplock_request);
1326 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1329 struct share_mode_entry *ex_entry)
1331 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1334 if (ex_entry == NULL) {
1338 if (server_id_is_disconnected(&ex_entry->pid)) {
1340 * since only durable handles can get disconnected,
1341 * and we can only get durable handles with batch oplocks,
1342 * this should actually never be reached...
1347 send_break_message(fsp, ex_entry, mid, oplock_request);
1351 static bool file_has_brlocks(files_struct *fsp)
1353 struct byte_range_lock *br_lck;
1355 br_lck = brl_get_locks_readonly(fsp);
1359 return br_lck->num_locks > 0 ? true : false;
1362 static void grant_fsp_oplock_type(files_struct *fsp,
1364 bool got_level2_oplock,
1365 bool got_a_none_oplock)
1367 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1368 lp_level2_oplocks(SNUM(fsp->conn));
1370 /* Start by granting what the client asked for,
1371 but ensure no SAMBA_PRIVATE bits can be set. */
1372 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1374 if (oplock_request & INTERNAL_OPEN_ONLY) {
1375 /* No oplocks on internal open. */
1376 fsp->oplock_type = NO_OPLOCK;
1377 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1378 fsp->oplock_type, fsp_str_dbg(fsp)));
1382 if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1383 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1385 fsp->oplock_type = NO_OPLOCK;
1388 if (is_stat_open(fsp->access_mask)) {
1389 /* Leave the value already set. */
1390 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1391 fsp->oplock_type, fsp_str_dbg(fsp)));
1396 * Match what was requested (fsp->oplock_type) with
1397 * what was found in the existing share modes.
1400 if (got_a_none_oplock) {
1401 fsp->oplock_type = NO_OPLOCK;
1402 } else if (got_level2_oplock) {
1403 if (fsp->oplock_type == NO_OPLOCK ||
1404 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1405 /* Store a level2 oplock, but don't tell the client */
1406 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1408 fsp->oplock_type = LEVEL_II_OPLOCK;
1411 /* All share_mode_entries are placeholders or deferred.
1412 * Silently upgrade to fake levelII if the client didn't
1413 * ask for an oplock. */
1414 if (fsp->oplock_type == NO_OPLOCK) {
1415 /* Store a level2 oplock, but don't tell the client */
1416 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1421 * Don't grant level2 to clients that don't want them
1422 * or if we've turned them off.
1424 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1425 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1428 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1429 fsp->oplock_type, fsp_str_dbg(fsp)));
1432 static bool request_timed_out(struct timeval request_time,
1433 struct timeval timeout)
1435 struct timeval now, end_time;
1437 end_time = timeval_sum(&request_time, &timeout);
1438 return (timeval_compare(&end_time, &now) < 0);
1441 /****************************************************************************
1442 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1443 ****************************************************************************/
1445 static void defer_open(struct share_mode_lock *lck,
1446 struct timeval request_time,
1447 struct timeval timeout,
1448 struct smb_request *req,
1449 struct deferred_open_record *state)
1451 struct server_id self = messaging_server_id(req->sconn->msg_ctx);
1453 /* Paranoia check */
1458 for (i=0; i<lck->data->num_share_modes; i++) {
1459 struct share_mode_entry *e = &lck->data->share_modes[i];
1461 if (is_deferred_open_entry(e) &&
1462 serverid_equal(&self, &e->pid) &&
1463 (e->op_mid == req->mid)) {
1464 DEBUG(0, ("Trying to defer an already deferred "
1465 "request: mid=%llu, exiting\n",
1466 (unsigned long long)req->mid));
1467 exit_server("attempt to defer a deferred request");
1472 /* End paranoia check */
1474 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1475 "open entry for mid %llu\n",
1476 (unsigned int)request_time.tv_sec,
1477 (unsigned int)request_time.tv_usec,
1478 (unsigned long long)req->mid));
1480 if (!push_deferred_open_message_smb(req, request_time, timeout,
1481 state->id, (char *)state, sizeof(*state))) {
1482 exit_server("push_deferred_open_message_smb failed");
1485 add_deferred_open(lck, req->mid, request_time, self, state->id);
1490 /****************************************************************************
1491 On overwrite open ensure that the attributes match.
1492 ****************************************************************************/
1494 static bool open_match_attributes(connection_struct *conn,
1495 uint32 old_dos_attr,
1496 uint32 new_dos_attr,
1497 mode_t existing_unx_mode,
1498 mode_t new_unx_mode,
1499 mode_t *returned_unx_mode)
1501 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1503 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1504 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1506 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1507 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1508 *returned_unx_mode = new_unx_mode;
1510 *returned_unx_mode = (mode_t)0;
1513 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1514 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1515 "returned_unx_mode = 0%o\n",
1516 (unsigned int)old_dos_attr,
1517 (unsigned int)existing_unx_mode,
1518 (unsigned int)new_dos_attr,
1519 (unsigned int)*returned_unx_mode ));
1521 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1522 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1523 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1524 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1528 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1529 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1530 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1537 /****************************************************************************
1538 Special FCB or DOS processing in the case of a sharing violation.
1539 Try and find a duplicated file handle.
1540 ****************************************************************************/
1542 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
1543 connection_struct *conn,
1544 files_struct *fsp_to_dup_into,
1545 const struct smb_filename *smb_fname,
1550 uint32 share_access,
1551 uint32 create_options)
1555 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1556 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1558 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1559 fsp = file_find_di_next(fsp)) {
1561 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1562 "vuid = %llu, file_pid = %u, private_options = 0x%x "
1563 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1564 fsp->fh->fd, (unsigned long long)fsp->vuid,
1565 (unsigned int)fsp->file_pid,
1566 (unsigned int)fsp->fh->private_options,
1567 (unsigned int)fsp->access_mask ));
1569 if (fsp->fh->fd != -1 &&
1570 fsp->vuid == vuid &&
1571 fsp->file_pid == file_pid &&
1572 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1573 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1574 (fsp->access_mask & FILE_WRITE_DATA) &&
1575 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1576 strequal(fsp->fsp_name->stream_name,
1577 smb_fname->stream_name)) {
1578 DEBUG(10,("fcb_or_dos_open: file match\n"));
1584 return NT_STATUS_NOT_FOUND;
1587 /* quite an insane set of semantics ... */
1588 if (is_executable(smb_fname->base_name) &&
1589 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1590 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1591 return NT_STATUS_INVALID_PARAMETER;
1594 /* We need to duplicate this fsp. */
1595 return dup_file_fsp(req, fsp, access_mask, share_access,
1596 create_options, fsp_to_dup_into);
1599 static void schedule_defer_open(struct share_mode_lock *lck,
1600 struct timeval request_time,
1601 struct smb_request *req)
1603 struct deferred_open_record state;
1605 /* This is a relative time, added to the absolute
1606 request_time value to get the absolute timeout time.
1607 Note that if this is the second or greater time we enter
1608 this codepath for this particular request mid then
1609 request_time is left as the absolute time of the *first*
1610 time this request mid was processed. This is what allows
1611 the request to eventually time out. */
1613 struct timeval timeout;
1615 /* Normally the smbd we asked should respond within
1616 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1617 * the client did, give twice the timeout as a safety
1618 * measure here in case the other smbd is stuck
1619 * somewhere else. */
1621 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1623 /* Nothing actually uses state.delayed_for_oplocks
1624 but it's handy to differentiate in debug messages
1625 between a 30 second delay due to oplock break, and
1626 a 1 second delay for share mode conflicts. */
1628 state.delayed_for_oplocks = True;
1629 state.async_open = false;
1630 state.id = lck->data->id;
1632 if (!request_timed_out(request_time, timeout)) {
1633 defer_open(lck, request_time, timeout, req, &state);
1637 /****************************************************************************
1638 Reschedule an open call that went asynchronous.
1639 ****************************************************************************/
1641 static void schedule_async_open(struct timeval request_time,
1642 struct smb_request *req)
1644 struct deferred_open_record state;
1645 struct timeval timeout;
1647 timeout = timeval_set(20, 0);
1650 state.delayed_for_oplocks = false;
1651 state.async_open = true;
1653 if (!request_timed_out(request_time, timeout)) {
1654 defer_open(NULL, request_time, timeout, req, &state);
1658 /****************************************************************************
1659 Work out what access_mask to use from what the client sent us.
1660 ****************************************************************************/
1662 static NTSTATUS smbd_calculate_maximum_allowed_access(
1663 connection_struct *conn,
1664 const struct smb_filename *smb_fname,
1665 uint32_t *p_access_mask)
1667 struct security_descriptor *sd;
1668 uint32_t access_granted;
1671 if (get_current_uid(conn) == (uid_t)0) {
1672 *p_access_mask |= FILE_GENERIC_ALL;
1673 return NT_STATUS_OK;
1676 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1681 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1683 * File did not exist
1685 *p_access_mask = FILE_GENERIC_ALL;
1686 return NT_STATUS_OK;
1688 if (!NT_STATUS_IS_OK(status)) {
1689 DEBUG(10,("Could not get acl on file %s: %s\n",
1690 smb_fname_str_dbg(smb_fname),
1691 nt_errstr(status)));
1692 return NT_STATUS_ACCESS_DENIED;
1696 * Never test FILE_READ_ATTRIBUTES. se_file_access_check()
1697 * also takes care of owner WRITE_DAC and READ_CONTROL.
1699 status = se_file_access_check(sd,
1700 get_current_nttok(conn),
1702 (*p_access_mask & ~FILE_READ_ATTRIBUTES),
1707 if (!NT_STATUS_IS_OK(status)) {
1708 DEBUG(10, ("Access denied on file %s: "
1709 "when calculating maximum access\n",
1710 smb_fname_str_dbg(smb_fname)));
1711 return NT_STATUS_ACCESS_DENIED;
1713 *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1714 return NT_STATUS_OK;
1717 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1718 const struct smb_filename *smb_fname,
1719 uint32_t access_mask,
1720 uint32_t *access_mask_out)
1723 uint32_t orig_access_mask = access_mask;
1724 uint32_t rejected_share_access;
1727 * Convert GENERIC bits to specific bits.
1730 se_map_generic(&access_mask, &file_generic_mapping);
1732 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1733 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1735 status = smbd_calculate_maximum_allowed_access(
1736 conn, smb_fname, &access_mask);
1738 if (!NT_STATUS_IS_OK(status)) {
1742 access_mask &= conn->share_access;
1745 rejected_share_access = access_mask & ~(conn->share_access);
1747 if (rejected_share_access) {
1748 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1749 "file %s: rejected by share access mask[0x%08X] "
1750 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1751 smb_fname_str_dbg(smb_fname),
1753 orig_access_mask, access_mask,
1754 rejected_share_access));
1755 return NT_STATUS_ACCESS_DENIED;
1758 *access_mask_out = access_mask;
1759 return NT_STATUS_OK;
1762 /****************************************************************************
1763 Remove the deferred open entry under lock.
1764 ****************************************************************************/
1766 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1767 struct server_id pid)
1769 struct share_mode_lock *lck = get_existing_share_mode_lock(
1772 DEBUG(0, ("could not get share mode lock\n"));
1775 del_deferred_open_entry(lck, mid, pid);
1779 /****************************************************************************
1780 Return true if this is a state pointer to an asynchronous create.
1781 ****************************************************************************/
1783 bool is_deferred_open_async(const void *ptr)
1785 const struct deferred_open_record *state = (const struct deferred_open_record *)ptr;
1787 return state->async_open;
1790 static bool clear_ads(uint32_t create_disposition)
1794 switch (create_disposition) {
1795 case FILE_SUPERSEDE:
1796 case FILE_OVERWRITE_IF:
1797 case FILE_OVERWRITE:
1806 static int disposition_to_open_flags(uint32_t create_disposition)
1811 * Currently we're using FILE_SUPERSEDE as the same as
1812 * FILE_OVERWRITE_IF but they really are
1813 * different. FILE_SUPERSEDE deletes an existing file
1814 * (requiring delete access) then recreates it.
1817 switch (create_disposition) {
1818 case FILE_SUPERSEDE:
1819 case FILE_OVERWRITE_IF:
1821 * If file exists replace/overwrite. If file doesn't
1824 ret = O_CREAT|O_TRUNC;
1829 * If file exists open. If file doesn't exist error.
1834 case FILE_OVERWRITE:
1836 * If file exists overwrite. If file doesn't exist
1844 * If file exists error. If file doesn't exist create.
1846 ret = O_CREAT|O_EXCL;
1851 * If file exists open. If file doesn't exist create.
1859 /****************************************************************************
1860 Open a file with a share mode. Passed in an already created files_struct *.
1861 ****************************************************************************/
1863 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1864 struct smb_request *req,
1865 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1866 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1867 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1868 uint32 create_options, /* options such as delete on close. */
1869 uint32 new_dos_attributes, /* attributes used for new file. */
1870 int oplock_request, /* internal Samba oplock codes. */
1871 /* Information (FILE_EXISTS etc.) */
1872 uint32_t private_flags, /* Samba specific flags. */
1876 struct smb_filename *smb_fname = fsp->fsp_name;
1879 bool file_existed = VALID_STAT(smb_fname->st);
1880 bool def_acl = False;
1881 bool posix_open = False;
1882 bool new_file_created = False;
1883 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1884 mode_t new_unx_mode = (mode_t)0;
1885 mode_t unx_mode = (mode_t)0;
1887 uint32 existing_dos_attributes = 0;
1888 struct timeval request_time = timeval_zero();
1889 struct share_mode_lock *lck = NULL;
1890 uint32 open_access_mask = access_mask;
1893 SMB_STRUCT_STAT saved_stat = smb_fname->st;
1895 if (conn->printer) {
1897 * Printers are handled completely differently.
1898 * Most of the passed parameters are ignored.
1902 *pinfo = FILE_WAS_CREATED;
1905 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1906 smb_fname_str_dbg(smb_fname)));
1909 DEBUG(0,("open_file_ntcreate: printer open without "
1910 "an SMB request!\n"));
1911 return NT_STATUS_INTERNAL_ERROR;
1914 return print_spool_open(fsp, smb_fname->base_name,
1918 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1920 return NT_STATUS_NO_MEMORY;
1923 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1925 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1926 new_dos_attributes = 0;
1928 /* Windows allows a new file to be created and
1929 silently removes a FILE_ATTRIBUTE_DIRECTORY
1930 sent by the client. Do the same. */
1932 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1934 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1936 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1937 smb_fname, parent_dir);
1940 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1941 "access_mask=0x%x share_access=0x%x "
1942 "create_disposition = 0x%x create_options=0x%x "
1943 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1944 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1945 access_mask, share_access, create_disposition,
1946 create_options, (unsigned int)unx_mode, oplock_request,
1947 (unsigned int)private_flags));
1949 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1950 DEBUG(0, ("No smb request but not an internal only open!\n"));
1951 return NT_STATUS_INTERNAL_ERROR;
1955 * Only non-internal opens can be deferred at all
1960 if (get_deferred_open_message_state(req,
1963 /* Remember the absolute time of the original
1964 request with this mid. We'll use it later to
1965 see if this has timed out. */
1967 /* If it was an async create retry, the file
1970 if (is_deferred_open_async(ptr)) {
1971 SET_STAT_INVALID(smb_fname->st);
1972 file_existed = false;
1974 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1975 /* Remove the deferred open entry under lock. */
1976 remove_deferred_open_entry(
1977 state->id, req->mid,
1978 messaging_server_id(req->sconn->msg_ctx));
1981 /* Ensure we don't reprocess this message. */
1982 remove_deferred_open_message_smb(req->sconn, req->mid);
1987 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1989 existing_dos_attributes = dos_mode(conn, smb_fname);
1993 /* ignore any oplock requests if oplocks are disabled */
1994 if (!lp_oplocks(SNUM(conn)) ||
1995 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1996 /* Mask off everything except the private Samba bits. */
1997 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
2000 /* this is for OS/2 long file names - say we don't support them */
2001 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
2002 /* OS/2 Workplace shell fix may be main code stream in a later
2004 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
2006 if (use_nt_status()) {
2007 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2009 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
2012 switch( create_disposition ) {
2014 /* If file exists open. If file doesn't exist error. */
2015 if (!file_existed) {
2016 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
2017 "requested for file %s and file "
2019 smb_fname_str_dbg(smb_fname)));
2021 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2025 case FILE_OVERWRITE:
2026 /* If file exists overwrite. If file doesn't exist
2028 if (!file_existed) {
2029 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
2030 "requested for file %s and file "
2032 smb_fname_str_dbg(smb_fname) ));
2034 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2039 /* If file exists error. If file doesn't exist
2042 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
2043 "requested for file %s and file "
2044 "already exists.\n",
2045 smb_fname_str_dbg(smb_fname)));
2046 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
2051 return map_nt_error_from_unix(errno);
2055 case FILE_SUPERSEDE:
2056 case FILE_OVERWRITE_IF:
2060 return NT_STATUS_INVALID_PARAMETER;
2063 flags2 = disposition_to_open_flags(create_disposition);
2065 /* We only care about matching attributes on file exists and
2068 if (!posix_open && file_existed &&
2069 ((create_disposition == FILE_OVERWRITE) ||
2070 (create_disposition == FILE_OVERWRITE_IF))) {
2071 if (!open_match_attributes(conn, existing_dos_attributes,
2073 smb_fname->st.st_ex_mode,
2074 unx_mode, &new_unx_mode)) {
2075 DEBUG(5,("open_file_ntcreate: attributes missmatch "
2076 "for file %s (%x %x) (0%o, 0%o)\n",
2077 smb_fname_str_dbg(smb_fname),
2078 existing_dos_attributes,
2080 (unsigned int)smb_fname->st.st_ex_mode,
2081 (unsigned int)unx_mode ));
2083 return NT_STATUS_ACCESS_DENIED;
2087 status = smbd_calculate_access_mask(conn, smb_fname,
2090 if (!NT_STATUS_IS_OK(status)) {
2091 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
2092 "on file %s returned %s\n",
2093 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
2097 open_access_mask = access_mask;
2099 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
2100 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
2103 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
2104 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
2108 * Note that we ignore the append flag as append does not
2109 * mean the same thing under DOS and Unix.
2112 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
2113 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
2114 /* DENY_DOS opens are always underlying read-write on the
2115 file handle, no matter what the requested access mask
2117 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
2118 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
2128 * Currently we only look at FILE_WRITE_THROUGH for create options.
2132 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
2137 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
2141 if (!posix_open && !CAN_WRITE(conn)) {
2143 * We should really return a permission denied error if either
2144 * O_CREAT or O_TRUNC are set, but for compatibility with
2145 * older versions of Samba we just AND them out.
2147 flags2 &= ~(O_CREAT|O_TRUNC);
2151 * Ensure we can't write on a read-only share or file.
2154 if (flags != O_RDONLY && file_existed &&
2155 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
2156 DEBUG(5,("open_file_ntcreate: write access requested for "
2157 "file %s on read only %s\n",
2158 smb_fname_str_dbg(smb_fname),
2159 !CAN_WRITE(conn) ? "share" : "file" ));
2161 return NT_STATUS_ACCESS_DENIED;
2164 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2165 fsp->share_access = share_access;
2166 fsp->fh->private_options = private_flags;
2167 fsp->access_mask = open_access_mask; /* We change this to the
2168 * requested access_mask after
2169 * the open is done. */
2170 fsp->posix_open = posix_open;
2172 /* Ensure no SAMBA_PRIVATE bits can be set. */
2173 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
2175 if (timeval_is_zero(&request_time)) {
2176 request_time = fsp->open_time;
2180 struct share_mode_entry *batch_entry = NULL;
2181 struct share_mode_entry *exclusive_entry = NULL;
2182 bool got_level2_oplock = false;
2183 bool got_a_none_oplock = false;
2186 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2187 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2189 lck = get_share_mode_lock(talloc_tos(), id,
2191 smb_fname, &old_write_time);
2193 DEBUG(0, ("Could not get share mode lock\n"));
2194 return NT_STATUS_SHARING_VIOLATION;
2197 /* Get the types we need to examine. */
2198 find_oplock_types(fsp,
2204 &got_a_none_oplock);
2206 /* First pass - send break only on batch oplocks. */
2207 if ((req != NULL) &&
2208 delay_for_batch_oplocks(fsp,
2212 schedule_defer_open(lck, request_time, req);
2214 return NT_STATUS_SHARING_VIOLATION;
2217 /* Use the client requested access mask here, not the one we
2219 status = open_mode_check(conn, lck, fsp->name_hash,
2220 access_mask, share_access,
2221 create_options, &file_existed);
2223 if (NT_STATUS_IS_OK(status)) {
2224 /* We might be going to allow this open. Check oplock
2226 /* Second pass - send break for both batch or
2227 * exclusive oplocks. */
2228 if ((req != NULL) &&
2229 delay_for_exclusive_oplocks(
2234 schedule_defer_open(lck, request_time, req);
2236 return NT_STATUS_SHARING_VIOLATION;
2240 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2241 /* DELETE_PENDING is not deferred for a second */
2246 grant_fsp_oplock_type(fsp,
2251 if (!NT_STATUS_IS_OK(status)) {
2252 uint32 can_access_mask;
2253 bool can_access = True;
2255 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2257 /* Check if this can be done with the deny_dos and fcb
2260 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2261 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2263 DEBUG(0, ("DOS open without an SMB "
2266 return NT_STATUS_INTERNAL_ERROR;
2269 /* Use the client requested access mask here,
2270 * not the one we open with. */
2271 status = fcb_or_dos_open(req,
2282 if (NT_STATUS_IS_OK(status)) {
2285 *pinfo = FILE_WAS_OPENED;
2287 return NT_STATUS_OK;
2292 * This next line is a subtlety we need for
2293 * MS-Access. If a file open will fail due to share
2294 * permissions and also for security (access) reasons,
2295 * we need to return the access failed error, not the
2296 * share error. We can't open the file due to kernel
2297 * oplock deadlock (it's possible we failed above on
2298 * the open_mode_check()) so use a userspace check.
2301 if (flags & O_RDWR) {
2302 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2303 } else if (flags & O_WRONLY) {
2304 can_access_mask = FILE_WRITE_DATA;
2306 can_access_mask = FILE_READ_DATA;
2309 if (((can_access_mask & FILE_WRITE_DATA) &&
2310 !CAN_WRITE(conn)) ||
2311 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2314 can_access_mask))) {
2319 * If we're returning a share violation, ensure we
2320 * cope with the braindead 1 second delay.
2323 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2324 lp_defer_sharing_violations()) {
2325 struct timeval timeout;
2326 struct deferred_open_record state;
2329 /* this is a hack to speed up torture tests
2331 timeout_usecs = lp_parm_int(SNUM(conn),
2332 "smbd","sharedelay",
2333 SHARING_VIOLATION_USEC_WAIT);
2335 /* This is a relative time, added to the absolute
2336 request_time value to get the absolute timeout time.
2337 Note that if this is the second or greater time we enter
2338 this codepath for this particular request mid then
2339 request_time is left as the absolute time of the *first*
2340 time this request mid was processed. This is what allows
2341 the request to eventually time out. */
2343 timeout = timeval_set(0, timeout_usecs);
2345 /* Nothing actually uses state.delayed_for_oplocks
2346 but it's handy to differentiate in debug messages
2347 between a 30 second delay due to oplock break, and
2348 a 1 second delay for share mode conflicts. */
2350 state.delayed_for_oplocks = False;
2351 state.async_open = false;
2355 && !request_timed_out(request_time,
2357 defer_open(lck, request_time, timeout,
2365 * We have detected a sharing violation here
2366 * so return the correct error code
2368 status = NT_STATUS_SHARING_VIOLATION;
2370 status = NT_STATUS_ACCESS_DENIED;
2376 * We exit this block with the share entry *locked*.....
2380 SMB_ASSERT(!file_existed || (lck != NULL));
2383 * Ensure we pay attention to default ACLs on directories if required.
2386 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2387 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2388 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2391 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2392 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2393 (unsigned int)flags, (unsigned int)flags2,
2394 (unsigned int)unx_mode, (unsigned int)access_mask,
2395 (unsigned int)open_access_mask));
2397 fsp_open = open_file(fsp, conn, req, parent_dir,
2398 flags|flags2, unx_mode, access_mask,
2399 open_access_mask, &new_file_created);
2401 if (!NT_STATUS_IS_OK(fsp_open)) {
2402 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_RETRY)) {
2403 schedule_async_open(request_time, req);
2409 if (file_existed && !check_same_dev_ino(&saved_stat, &smb_fname->st)) {
2411 * The file did exist, but some other (local or NFS)
2412 * process either renamed/unlinked and re-created the
2413 * file with different dev/ino after we walked the path,
2414 * but before we did the open. We could retry the
2415 * open but it's a rare enough case it's easier to
2416 * just fail the open to prevent creating any problems
2417 * in the open file db having the wrong dev/ino key.
2421 DEBUG(1,("open_file_ntcreate: file %s - dev/ino mismatch. "
2422 "Old (dev=0x%llu, ino =0x%llu). "
2423 "New (dev=0x%llu, ino=0x%llu). Failing open "
2424 " with NT_STATUS_ACCESS_DENIED.\n",
2425 smb_fname_str_dbg(smb_fname),
2426 (unsigned long long)saved_stat.st_ex_dev,
2427 (unsigned long long)saved_stat.st_ex_ino,
2428 (unsigned long long)smb_fname->st.st_ex_dev,
2429 (unsigned long long)smb_fname->st.st_ex_ino));
2430 return NT_STATUS_ACCESS_DENIED;
2433 if (!file_existed) {
2434 struct share_mode_entry *batch_entry = NULL;
2435 struct share_mode_entry *exclusive_entry = NULL;
2436 bool got_level2_oplock = false;
2437 bool got_a_none_oplock = false;
2438 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2441 * Deal with the race condition where two smbd's detect the
2442 * file doesn't exist and do the create at the same time. One
2443 * of them will win and set a share mode, the other (ie. this
2444 * one) should check if the requested share mode for this
2445 * create is allowed.
2449 * Now the file exists and fsp is successfully opened,
2450 * fsp->dev and fsp->inode are valid and should replace the
2451 * dev=0,inode=0 from a non existent file. Spotted by
2452 * Nadav Danieli <nadavd@exanet.com>. JRA.
2457 lck = get_share_mode_lock(talloc_tos(), id,
2459 smb_fname, &old_write_time);
2462 DEBUG(0, ("open_file_ntcreate: Could not get share "
2463 "mode lock for %s\n",
2464 smb_fname_str_dbg(smb_fname)));
2466 return NT_STATUS_SHARING_VIOLATION;
2469 /* Get the types we need to examine. */
2470 find_oplock_types(fsp,
2476 &got_a_none_oplock);
2478 /* First pass - send break only on batch oplocks. */
2479 if ((req != NULL) &&
2480 delay_for_batch_oplocks(fsp,
2484 schedule_defer_open(lck, request_time, req);
2487 return NT_STATUS_SHARING_VIOLATION;
2490 status = open_mode_check(conn, lck, fsp->name_hash,
2491 access_mask, share_access,
2492 create_options, &file_existed);
2494 if (NT_STATUS_IS_OK(status)) {
2495 /* We might be going to allow this open. Check oplock
2497 /* Second pass - send break for both batch or
2498 * exclusive oplocks. */
2499 if ((req != NULL) &&
2500 delay_for_exclusive_oplocks(
2505 schedule_defer_open(lck, request_time, req);
2508 return NT_STATUS_SHARING_VIOLATION;
2512 if (!NT_STATUS_IS_OK(status)) {
2513 struct deferred_open_record state;
2515 state.delayed_for_oplocks = False;
2516 state.async_open = false;
2519 /* Do it all over again immediately. In the second
2520 * round we will find that the file existed and handle
2521 * the DELETE_PENDING and FCB cases correctly. No need
2522 * to duplicate the code here. Essentially this is a
2523 * "goto top of this function", but don't tell
2527 defer_open(lck, request_time, timeval_zero(),
2535 grant_fsp_oplock_type(fsp,
2541 * We exit this block with the share entry *locked*.....
2546 SMB_ASSERT(lck != NULL);
2548 /* Delete streams if create_disposition requires it */
2549 if (!new_file_created && clear_ads(create_disposition) &&
2550 !is_ntfs_stream_smb_fname(smb_fname)) {
2551 status = delete_all_streams(conn, smb_fname->base_name);
2552 if (!NT_STATUS_IS_OK(status)) {
2559 /* note that we ignore failure for the following. It is
2560 basically a hack for NFS, and NFS will never set one of
2561 these only read them. Nobody but Samba can ever set a deny
2562 mode and we have already checked our more authoritative
2563 locking database for permission to set this deny mode. If
2564 the kernel refuses the operations then the kernel is wrong.
2565 note that GPFS supports it as well - jmcd */
2567 if (fsp->fh->fd != -1 && lp_kernel_share_modes(SNUM(conn))) {
2569 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2570 if(ret_flock == -1 ){
2575 return NT_STATUS_SHARING_VIOLATION;
2580 * At this point onwards, we can guarentee that the share entry
2581 * is locked, whether we created the file or not, and that the
2582 * deny mode is compatible with all current opens.
2586 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2587 * but we don't have to store this - just ignore it on access check.
2589 if (conn->sconn->using_smb2) {
2591 * SMB2 doesn't return it (according to Microsoft tests).
2592 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2593 * File created with access = 0x7 (Read, Write, Delete)
2594 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2596 fsp->access_mask = access_mask;
2598 /* But SMB1 does. */
2599 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2603 /* stat opens on existing files don't get oplocks. */
2604 if (is_stat_open(open_access_mask)) {
2605 fsp->oplock_type = NO_OPLOCK;
2609 if (new_file_created) {
2610 info = FILE_WAS_CREATED;
2612 if (flags2 & O_TRUNC) {
2613 info = FILE_WAS_OVERWRITTEN;
2615 info = FILE_WAS_OPENED;
2624 * Setup the oplock info in both the shared memory and
2628 status = set_file_oplock(fsp, fsp->oplock_type);
2629 if (!NT_STATUS_IS_OK(status)) {
2631 * Could not get the kernel oplock or there are byte-range
2632 * locks on the file.
2634 fsp->oplock_type = NO_OPLOCK;
2637 set_share_mode(lck, fsp, get_current_uid(conn),
2641 /* Handle strange delete on close create semantics. */
2642 if (create_options & FILE_DELETE_ON_CLOSE) {
2644 status = can_set_delete_on_close(fsp, new_dos_attributes);
2646 if (!NT_STATUS_IS_OK(status)) {
2647 /* Remember to delete the mode we just added. */
2648 del_share_mode(lck, fsp);
2653 /* Note that here we set the *inital* delete on close flag,
2654 not the regular one. The magic gets handled in close. */
2655 fsp->initial_delete_on_close = True;
2658 if (info != FILE_WAS_OPENED) {
2659 /* Files should be initially set as archive */
2660 if (lp_map_archive(SNUM(conn)) ||
2661 lp_store_dos_attributes(SNUM(conn))) {
2663 if (file_set_dosmode(conn, smb_fname,
2664 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2665 parent_dir, true) == 0) {
2666 unx_mode = smb_fname->st.st_ex_mode;
2672 /* Determine sparse flag. */
2674 /* POSIX opens are sparse by default. */
2675 fsp->is_sparse = true;
2677 fsp->is_sparse = (file_existed &&
2678 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2682 * Take care of inherited ACLs on created files - if default ACL not
2686 if (!posix_open && new_file_created && !def_acl) {
2688 int saved_errno = errno; /* We might get ENOSYS in the next
2691 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2693 errno = saved_errno; /* Ignore ENOSYS */
2696 } else if (new_unx_mode) {
2700 /* Attributes need changing. File already existed. */
2703 int saved_errno = errno; /* We might get ENOSYS in the
2705 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2707 if (ret == -1 && errno == ENOSYS) {
2708 errno = saved_errno; /* Ignore ENOSYS */
2710 DEBUG(5, ("open_file_ntcreate: reset "
2711 "attributes of file %s to 0%o\n",
2712 smb_fname_str_dbg(smb_fname),
2713 (unsigned int)new_unx_mode));
2714 ret = 0; /* Don't do the fchmod below. */
2719 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2720 DEBUG(5, ("open_file_ntcreate: failed to reset "
2721 "attributes of file %s to 0%o\n",
2722 smb_fname_str_dbg(smb_fname),
2723 (unsigned int)new_unx_mode));
2726 /* If this is a successful open, we must remove any deferred open
2729 del_deferred_open_entry(lck, req->mid,
2730 messaging_server_id(req->sconn->msg_ctx));
2734 return NT_STATUS_OK;
2738 /****************************************************************************
2739 Open a file for for write to ensure that we can fchmod it.
2740 ****************************************************************************/
2742 NTSTATUS open_file_fchmod(connection_struct *conn,
2743 struct smb_filename *smb_fname,
2744 files_struct **result)
2746 if (!VALID_STAT(smb_fname->st)) {
2747 return NT_STATUS_INVALID_PARAMETER;
2750 return SMB_VFS_CREATE_FILE(
2753 0, /* root_dir_fid */
2754 smb_fname, /* fname */
2755 FILE_WRITE_DATA, /* access_mask */
2756 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2758 FILE_OPEN, /* create_disposition*/
2759 0, /* create_options */
2760 0, /* file_attributes */
2761 INTERNAL_OPEN_ONLY, /* oplock_request */
2762 0, /* allocation_size */
2763 0, /* private_flags */
2766 result, /* result */
2770 static NTSTATUS mkdir_internal(connection_struct *conn,
2771 struct smb_filename *smb_dname,
2772 uint32 file_attributes)
2775 char *parent_dir = NULL;
2777 bool posix_open = false;
2778 bool need_re_stat = false;
2779 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2781 if(access_mask & ~(conn->share_access)) {
2782 DEBUG(5,("mkdir_internal: failing share access "
2783 "%s\n", lp_servicename(talloc_tos(), SNUM(conn))));
2784 return NT_STATUS_ACCESS_DENIED;
2787 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2789 return NT_STATUS_NO_MEMORY;
2792 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2794 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2796 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2799 status = check_parent_access(conn,
2802 if(!NT_STATUS_IS_OK(status)) {
2803 DEBUG(5,("mkdir_internal: check_parent_access "
2804 "on directory %s for path %s returned %s\n",
2806 smb_dname->base_name,
2807 nt_errstr(status) ));
2811 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2812 return map_nt_error_from_unix(errno);
2815 /* Ensure we're checking for a symlink here.... */
2816 /* We don't want to get caught by a symlink racer. */
2818 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2819 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2820 smb_fname_str_dbg(smb_dname), strerror(errno)));
2821 return map_nt_error_from_unix(errno);
2824 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2825 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2826 smb_fname_str_dbg(smb_dname)));
2827 return NT_STATUS_NOT_A_DIRECTORY;
2830 if (lp_store_dos_attributes(SNUM(conn))) {
2832 file_set_dosmode(conn, smb_dname,
2833 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2838 if (lp_inherit_perms(SNUM(conn))) {
2839 inherit_access_posix_acl(conn, parent_dir,
2840 smb_dname->base_name, mode);
2841 need_re_stat = true;
2846 * Check if high bits should have been set,
2847 * then (if bits are missing): add them.
2848 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2851 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2852 (mode & ~smb_dname->st.st_ex_mode)) {
2853 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2854 (smb_dname->st.st_ex_mode |
2855 (mode & ~smb_dname->st.st_ex_mode)));
2856 need_re_stat = true;
2860 /* Change the owner if required. */
2861 if (lp_inherit_owner(SNUM(conn))) {
2862 change_dir_owner_to_parent(conn, parent_dir,
2863 smb_dname->base_name,
2865 need_re_stat = true;
2869 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2870 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2871 smb_fname_str_dbg(smb_dname), strerror(errno)));
2872 return map_nt_error_from_unix(errno);
2876 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2877 smb_dname->base_name);
2879 return NT_STATUS_OK;
2882 /****************************************************************************
2883 Open a directory from an NT SMB call.
2884 ****************************************************************************/
2886 static NTSTATUS open_directory(connection_struct *conn,
2887 struct smb_request *req,
2888 struct smb_filename *smb_dname,
2890 uint32 share_access,
2891 uint32 create_disposition,
2892 uint32 create_options,
2893 uint32 file_attributes,
2895 files_struct **result)
2897 files_struct *fsp = NULL;
2898 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2899 struct share_mode_lock *lck = NULL;
2901 struct timespec mtimespec;
2904 if (is_ntfs_stream_smb_fname(smb_dname)) {
2905 DEBUG(2, ("open_directory: %s is a stream name!\n",
2906 smb_fname_str_dbg(smb_dname)));
2907 return NT_STATUS_NOT_A_DIRECTORY;
2910 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
2911 /* Ensure we have a directory attribute. */
2912 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2915 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2916 "share_access = 0x%x create_options = 0x%x, "
2917 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2918 smb_fname_str_dbg(smb_dname),
2919 (unsigned int)access_mask,
2920 (unsigned int)share_access,
2921 (unsigned int)create_options,
2922 (unsigned int)create_disposition,
2923 (unsigned int)file_attributes));
2925 status = smbd_calculate_access_mask(conn, smb_dname,
2926 access_mask, &access_mask);
2927 if (!NT_STATUS_IS_OK(status)) {
2928 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2929 "on file %s returned %s\n",
2930 smb_fname_str_dbg(smb_dname),
2931 nt_errstr(status)));
2935 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2936 !security_token_has_privilege(get_current_nttok(conn),
2937 SEC_PRIV_SECURITY)) {
2938 DEBUG(10, ("open_directory: open on %s "
2939 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2940 smb_fname_str_dbg(smb_dname)));
2941 return NT_STATUS_PRIVILEGE_NOT_HELD;
2944 switch( create_disposition ) {
2948 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2951 info = FILE_WAS_OPENED;
2956 /* If directory exists error. If directory doesn't
2960 status = NT_STATUS_OBJECT_NAME_COLLISION;
2961 DEBUG(2, ("open_directory: unable to create "
2962 "%s. Error was %s\n",
2963 smb_fname_str_dbg(smb_dname),
2964 nt_errstr(status)));
2968 status = mkdir_internal(conn, smb_dname,
2971 if (!NT_STATUS_IS_OK(status)) {
2972 DEBUG(2, ("open_directory: unable to create "
2973 "%s. Error was %s\n",
2974 smb_fname_str_dbg(smb_dname),
2975 nt_errstr(status)));
2979 info = FILE_WAS_CREATED;
2984 * If directory exists open. If directory doesn't
2989 status = NT_STATUS_OK;
2990 info = FILE_WAS_OPENED;
2992 status = mkdir_internal(conn, smb_dname,
2995 if (NT_STATUS_IS_OK(status)) {
2996 info = FILE_WAS_CREATED;
2998 /* Cope with create race. */
2999 if (!NT_STATUS_EQUAL(status,
3000 NT_STATUS_OBJECT_NAME_COLLISION)) {
3001 DEBUG(2, ("open_directory: unable to create "
3002 "%s. Error was %s\n",
3003 smb_fname_str_dbg(smb_dname),
3004 nt_errstr(status)));
3007 info = FILE_WAS_OPENED;
3013 case FILE_SUPERSEDE:
3014 case FILE_OVERWRITE:
3015 case FILE_OVERWRITE_IF:
3017 DEBUG(5,("open_directory: invalid create_disposition "
3018 "0x%x for directory %s\n",
3019 (unsigned int)create_disposition,
3020 smb_fname_str_dbg(smb_dname)));
3021 return NT_STATUS_INVALID_PARAMETER;
3024 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
3025 DEBUG(5,("open_directory: %s is not a directory !\n",
3026 smb_fname_str_dbg(smb_dname)));
3027 return NT_STATUS_NOT_A_DIRECTORY;
3030 if (info == FILE_WAS_OPENED) {
3031 status = smbd_check_access_rights(conn,
3035 if (!NT_STATUS_IS_OK(status)) {
3036 DEBUG(10, ("open_directory: smbd_check_access_rights on "
3037 "file %s failed with %s\n",
3038 smb_fname_str_dbg(smb_dname),
3039 nt_errstr(status)));
3044 status = file_new(req, conn, &fsp);
3045 if(!NT_STATUS_IS_OK(status)) {
3050 * Setup the files_struct for it.
3053 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
3054 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
3055 fsp->file_pid = req ? req->smbpid : 0;
3056 fsp->can_lock = False;
3057 fsp->can_read = False;
3058 fsp->can_write = False;
3060 fsp->share_access = share_access;
3061 fsp->fh->private_options = 0;
3063 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
3065 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3066 fsp->print_file = NULL;
3067 fsp->modified = False;
3068 fsp->oplock_type = NO_OPLOCK;
3069 fsp->sent_oplock_break = NO_BREAK_SENT;
3070 fsp->is_directory = True;
3071 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
3072 status = fsp_set_smb_fname(fsp, smb_dname);
3073 if (!NT_STATUS_IS_OK(status)) {
3074 file_free(req, fsp);
3078 mtimespec = smb_dname->st.st_ex_mtime;
3081 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
3083 /* POSIX allows us to open a directory with O_RDONLY. */
3084 status = fd_open(conn, fsp, O_RDONLY, 0);
3086 if (!NT_STATUS_IS_OK(status)) {
3087 DEBUG(5, ("open_directory: Could not open fd for "
3089 smb_fname_str_dbg(smb_dname),
3090 nt_errstr(status)));
3091 file_free(req, fsp);
3095 status = vfs_stat_fsp(fsp);
3096 if (!NT_STATUS_IS_OK(status)) {
3098 file_free(req, fsp);
3102 /* Ensure there was no race condition. */
3103 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
3104 DEBUG(5,("open_directory: stat struct differs for "
3106 smb_fname_str_dbg(smb_dname)));
3108 file_free(req, fsp);
3109 return NT_STATUS_ACCESS_DENIED;
3112 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
3113 conn->connectpath, smb_dname,
3117 DEBUG(0, ("open_directory: Could not get share mode lock for "
3118 "%s\n", smb_fname_str_dbg(smb_dname)));
3120 file_free(req, fsp);
3121 return NT_STATUS_SHARING_VIOLATION;
3124 status = open_mode_check(conn, lck, fsp->name_hash,
3125 access_mask, share_access,
3126 create_options, &dir_existed);
3128 if (!NT_STATUS_IS_OK(status)) {
3131 file_free(req, fsp);
3135 set_share_mode(lck, fsp, get_current_uid(conn),
3136 req ? req->mid : 0, NO_OPLOCK);
3138 /* For directories the delete on close bit at open time seems
3139 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
3140 if (create_options & FILE_DELETE_ON_CLOSE) {
3141 status = can_set_delete_on_close(fsp, 0);
3142 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
3145 file_free(req, fsp);
3149 if (NT_STATUS_IS_OK(status)) {
3150 /* Note that here we set the *inital* delete on close flag,
3151 not the regular one. The magic gets handled in close. */
3152 fsp->initial_delete_on_close = True;
3163 return NT_STATUS_OK;
3166 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
3167 struct smb_filename *smb_dname)
3172 status = SMB_VFS_CREATE_FILE(
3175 0, /* root_dir_fid */
3176 smb_dname, /* fname */
3177 FILE_READ_ATTRIBUTES, /* access_mask */
3178 FILE_SHARE_NONE, /* share_access */
3179 FILE_CREATE, /* create_disposition*/
3180 FILE_DIRECTORY_FILE, /* create_options */
3181 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
3182 0, /* oplock_request */
3183 0, /* allocation_size */
3184 0, /* private_flags */
3190 if (NT_STATUS_IS_OK(status)) {
3191 close_file(req, fsp, NORMAL_CLOSE);
3197 /****************************************************************************
3198 Receive notification that one of our open files has been renamed by another
3200 ****************************************************************************/
3202 void msg_file_was_renamed(struct messaging_context *msg,
3205 struct server_id server_id,
3209 char *frm = (char *)data->data;
3211 const char *sharepath;
3212 const char *base_name;
3213 const char *stream_name;
3214 struct smb_filename *smb_fname = NULL;
3215 size_t sp_len, bn_len;
3217 struct smbd_server_connection *sconn =
3218 talloc_get_type_abort(private_data,
3219 struct smbd_server_connection);
3221 if (data->data == NULL
3222 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3223 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3224 (int)data->length));
3228 /* Unpack the message. */
3229 pull_file_id_24(frm, &id);
3230 sharepath = &frm[24];
3231 sp_len = strlen(sharepath);
3232 base_name = sharepath + sp_len + 1;
3233 bn_len = strlen(base_name);
3234 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3236 /* stream_name must always be NULL if there is no stream. */
3237 if (stream_name[0] == '\0') {
3241 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3242 stream_name, NULL, &smb_fname);
3243 if (!NT_STATUS_IS_OK(status)) {
3247 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3249 sharepath, smb_fname_str_dbg(smb_fname),
3250 file_id_string_tos(&id)));
3252 for(fsp = file_find_di_first(sconn, id); fsp;
3253 fsp = file_find_di_next(fsp)) {
3254 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3256 DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
3257 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
3258 smb_fname_str_dbg(smb_fname)));
3259 status = fsp_set_smb_fname(fsp, smb_fname);
3260 if (!NT_STATUS_IS_OK(status)) {
3265 /* Now we have the complete path we can work out if this is
3266 actually within this share and adjust newname accordingly. */
3267 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3268 "not sharepath %s) "
3269 "%s from %s -> %s\n",
3270 fsp->conn->connectpath,
3274 smb_fname_str_dbg(smb_fname)));
3278 TALLOC_FREE(smb_fname);
3283 * If a main file is opened for delete, all streams need to be checked for
3284 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3285 * If that works, delete them all by setting the delete on close and close.
3288 NTSTATUS open_streams_for_delete(connection_struct *conn,
3291 struct stream_struct *stream_info = NULL;
3292 files_struct **streams = NULL;
3294 unsigned int num_streams = 0;
3295 TALLOC_CTX *frame = talloc_stackframe();
3298 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3299 &num_streams, &stream_info);
3301 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3302 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3303 DEBUG(10, ("no streams around\n"));
3305 return NT_STATUS_OK;
3308 if (!NT_STATUS_IS_OK(status)) {
3309 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3310 nt_errstr(status)));
3314 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3317 if (num_streams == 0) {
3319 return NT_STATUS_OK;
3322 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3323 if (streams == NULL) {
3324 DEBUG(0, ("talloc failed\n"));
3325 status = NT_STATUS_NO_MEMORY;
3329 for (i=0; i<num_streams; i++) {
3330 struct smb_filename *smb_fname = NULL;
3332 if (strequal(stream_info[i].name, "::$DATA")) {
3337 status = create_synthetic_smb_fname(talloc_tos(), fname,
3338 stream_info[i].name,
3340 if (!NT_STATUS_IS_OK(status)) {
3344 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3345 DEBUG(10, ("Unable to stat stream: %s\n",
3346 smb_fname_str_dbg(smb_fname)));
3349 status = SMB_VFS_CREATE_FILE(
3352 0, /* root_dir_fid */
3353 smb_fname, /* fname */
3354 DELETE_ACCESS, /* access_mask */
3355 (FILE_SHARE_READ | /* share_access */
3356 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3357 FILE_OPEN, /* create_disposition*/
3358 0, /* create_options */
3359 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3360 0, /* oplock_request */
3361 0, /* allocation_size */
3362 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3365 &streams[i], /* result */
3368 if (!NT_STATUS_IS_OK(status)) {
3369 DEBUG(10, ("Could not open stream %s: %s\n",
3370 smb_fname_str_dbg(smb_fname),
3371 nt_errstr(status)));
3373 TALLOC_FREE(smb_fname);
3376 TALLOC_FREE(smb_fname);
3380 * don't touch the variable "status" beyond this point :-)
3383 for (i -= 1 ; i >= 0; i--) {
3384 if (streams[i] == NULL) {
3388 DEBUG(10, ("Closing stream # %d, %s\n", i,
3389 fsp_str_dbg(streams[i])));
3390 close_file(NULL, streams[i], NORMAL_CLOSE);
3398 /*********************************************************************
3399 Create a default ACL by inheriting from the parent. If no inheritance
3400 from the parent available, don't set anything. This will leave the actual
3401 permissions the new file or directory already got from the filesystem
3402 as the NT ACL when read.
3403 *********************************************************************/
3405 static NTSTATUS inherit_new_acl(files_struct *fsp)
3407 TALLOC_CTX *ctx = talloc_tos();
3408 char *parent_name = NULL;
3409 struct security_descriptor *parent_desc = NULL;
3410 NTSTATUS status = NT_STATUS_OK;
3411 struct security_descriptor *psd = NULL;
3412 struct dom_sid *owner_sid = NULL;
3413 struct dom_sid *group_sid = NULL;
3414 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3415 bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3416 bool inheritable_components = false;
3419 if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3420 return NT_STATUS_NO_MEMORY;
3423 status = SMB_VFS_GET_NT_ACL(fsp->conn,
3425 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3427 if (!NT_STATUS_IS_OK(status)) {
3431 inheritable_components = sd_has_inheritable_components(parent_desc,
3434 if (!inheritable_components && !inherit_owner) {
3435 /* Nothing to inherit and not setting owner. */
3436 return NT_STATUS_OK;
3439 /* Create an inherited descriptor from the parent. */
3441 if (DEBUGLEVEL >= 10) {
3442 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3443 fsp_str_dbg(fsp) ));
3444 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3447 /* Inherit from parent descriptor if "inherit owner" set. */
3448 if (inherit_owner) {
3449 owner_sid = parent_desc->owner_sid;
3450 group_sid = parent_desc->group_sid;
3453 if (owner_sid == NULL) {
3454 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3456 if (group_sid == NULL) {
3457 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3460 status = se_create_child_secdesc(ctx,
3467 if (!NT_STATUS_IS_OK(status)) {
3471 /* If inheritable_components == false,
3472 se_create_child_secdesc()
3473 creates a security desriptor with a NULL dacl
3474 entry, but with SEC_DESC_DACL_PRESENT. We need
3475 to remove that flag. */
3477 if (!inheritable_components) {
3478 security_info_sent &= ~SECINFO_DACL;
3479 psd->type &= ~SEC_DESC_DACL_PRESENT;
3482 if (DEBUGLEVEL >= 10) {
3483 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3484 fsp_str_dbg(fsp) ));
3485 NDR_PRINT_DEBUG(security_descriptor, psd);
3488 if (inherit_owner) {
3489 /* We need to be root to force this. */
3492 status = SMB_VFS_FSET_NT_ACL(fsp,
3495 if (inherit_owner) {
3502 * Wrapper around open_file_ntcreate and open_directory
3505 static NTSTATUS create_file_unixpath(connection_struct *conn,
3506 struct smb_request *req,
3507 struct smb_filename *smb_fname,
3508 uint32_t access_mask,
3509 uint32_t share_access,
3510 uint32_t create_disposition,
3511 uint32_t create_options,
3512 uint32_t file_attributes,
3513 uint32_t oplock_request,
3514 uint64_t allocation_size,
3515 uint32_t private_flags,
3516 struct security_descriptor *sd,
3517 struct ea_list *ea_list,
3519 files_struct **result,
3522 int info = FILE_WAS_OPENED;
3523 files_struct *base_fsp = NULL;
3524 files_struct *fsp = NULL;
3527 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3528 "file_attributes = 0x%x, share_access = 0x%x, "
3529 "create_disposition = 0x%x create_options = 0x%x "
3530 "oplock_request = 0x%x private_flags = 0x%x "
3531 "ea_list = 0x%p, sd = 0x%p, "
3533 (unsigned int)access_mask,
3534 (unsigned int)file_attributes,
3535 (unsigned int)share_access,
3536 (unsigned int)create_disposition,
3537 (unsigned int)create_options,
3538 (unsigned int)oplock_request,
3539 (unsigned int)private_flags,
3540 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3542 if (create_options & FILE_OPEN_BY_FILE_ID) {
3543 status = NT_STATUS_NOT_SUPPORTED;
3547 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3548 status = NT_STATUS_INVALID_PARAMETER;
3553 oplock_request |= INTERNAL_OPEN_ONLY;
3556 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3557 && (access_mask & DELETE_ACCESS)
3558 && !is_ntfs_stream_smb_fname(smb_fname)) {
3560 * We can't open a file with DELETE access if any of the
3561 * streams is open without FILE_SHARE_DELETE
3563 status = open_streams_for_delete(conn, smb_fname->base_name);
3565 if (!NT_STATUS_IS_OK(status)) {
3570 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3571 !security_token_has_privilege(get_current_nttok(conn),
3572 SEC_PRIV_SECURITY)) {
3573 DEBUG(10, ("create_file_unixpath: open on %s "
3574 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3575 smb_fname_str_dbg(smb_fname)));
3576 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3580 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3581 && is_ntfs_stream_smb_fname(smb_fname)
3582 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3583 uint32 base_create_disposition;
3584 struct smb_filename *smb_fname_base = NULL;
3586 if (create_options & FILE_DIRECTORY_FILE) {
3587 status = NT_STATUS_NOT_A_DIRECTORY;
3591 switch (create_disposition) {
3593 base_create_disposition = FILE_OPEN;
3596 base_create_disposition = FILE_OPEN_IF;
3600 /* Create an smb_filename with stream_name == NULL. */
3601 status = create_synthetic_smb_fname(talloc_tos(),
3602 smb_fname->base_name,
3605 if (!NT_STATUS_IS_OK(status)) {
3609 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3610 DEBUG(10, ("Unable to stat stream: %s\n",
3611 smb_fname_str_dbg(smb_fname_base)));
3614 /* Open the base file. */
3615 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3618 | FILE_SHARE_DELETE,
3619 base_create_disposition,
3620 0, 0, 0, 0, 0, NULL, NULL,
3622 TALLOC_FREE(smb_fname_base);
3624 if (!NT_STATUS_IS_OK(status)) {
3625 DEBUG(10, ("create_file_unixpath for base %s failed: "
3626 "%s\n", smb_fname->base_name,
3627 nt_errstr(status)));
3630 /* we don't need to low level fd */
3635 * If it's a request for a directory open, deal with it separately.
3638 if (create_options & FILE_DIRECTORY_FILE) {
3640 if (create_options & FILE_NON_DIRECTORY_FILE) {
3641 status = NT_STATUS_INVALID_PARAMETER;
3645 /* Can't open a temp directory. IFS kit test. */
3646 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3647 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3648 status = NT_STATUS_INVALID_PARAMETER;
3653 * We will get a create directory here if the Win32
3654 * app specified a security descriptor in the
3655 * CreateDirectory() call.
3659 status = open_directory(
3660 conn, req, smb_fname, access_mask, share_access,
3661 create_disposition, create_options, file_attributes,
3666 * Ordinary file case.
3669 status = file_new(req, conn, &fsp);
3670 if(!NT_STATUS_IS_OK(status)) {
3674 status = fsp_set_smb_fname(fsp, smb_fname);
3675 if (!NT_STATUS_IS_OK(status)) {
3681 * We're opening the stream element of a
3682 * base_fsp we already opened. Set up the
3685 fsp->base_fsp = base_fsp;
3688 if (allocation_size) {
3689 fsp->initial_allocation_size = smb_roundup(fsp->conn,
3693 status = open_file_ntcreate(conn,
3705 if(!NT_STATUS_IS_OK(status)) {
3706 file_free(req, fsp);
3710 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3712 /* A stream open never opens a directory */
3715 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3720 * Fail the open if it was explicitly a non-directory
3724 if (create_options & FILE_NON_DIRECTORY_FILE) {
3725 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3730 status = open_directory(
3731 conn, req, smb_fname, access_mask,
3732 share_access, create_disposition,
3733 create_options, file_attributes,
3738 if (!NT_STATUS_IS_OK(status)) {
3742 fsp->base_fsp = base_fsp;
3744 if ((ea_list != NULL) &&
3745 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3746 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3747 if (!NT_STATUS_IS_OK(status)) {
3752 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3753 status = NT_STATUS_ACCESS_DENIED;
3757 /* Save the requested allocation size. */
3758 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3760 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3761 fsp->initial_allocation_size = smb_roundup(
3762 fsp->conn, allocation_size);
3763 if (fsp->is_directory) {
3764 /* Can't set allocation size on a directory. */
3765 status = NT_STATUS_ACCESS_DENIED;
3768 if (vfs_allocate_file_space(
3769 fsp, fsp->initial_allocation_size) == -1) {
3770 status = NT_STATUS_DISK_FULL;
3774 fsp->initial_allocation_size = smb_roundup(
3775 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3778 fsp->initial_allocation_size = 0;
3781 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3782 fsp->base_fsp == NULL) {
3785 * According to the MS documentation, the only time the security
3786 * descriptor is applied to the opened file is iff we *created* the
3787 * file; an existing file stays the same.
3789 * Also, it seems (from observation) that you can open the file with
3790 * any access mask but you can still write the sd. We need to override
3791 * the granted access before we call set_sd
3792 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3795 uint32_t sec_info_sent;
3796 uint32_t saved_access_mask = fsp->access_mask;
3798 sec_info_sent = get_sec_info(sd);
3800 fsp->access_mask = FILE_GENERIC_ALL;
3802 if (sec_info_sent & (SECINFO_OWNER|
3806 status = set_sd(fsp, sd, sec_info_sent);
3809 fsp->access_mask = saved_access_mask;
3811 if (!NT_STATUS_IS_OK(status)) {
3814 } else if (lp_inherit_acls(SNUM(conn))) {
3815 /* Inherit from parent. Errors here are not fatal. */
3816 status = inherit_new_acl(fsp);
3817 if (!NT_STATUS_IS_OK(status)) {
3818 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3820 nt_errstr(status) ));
3825 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3828 if (pinfo != NULL) {
3832 smb_fname->st = fsp->fsp_name->st;
3834 return NT_STATUS_OK;
3837 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3840 if (base_fsp && fsp->base_fsp == base_fsp) {
3842 * The close_file below will close
3847 close_file(req, fsp, ERROR_CLOSE);
3850 if (base_fsp != NULL) {
3851 close_file(req, base_fsp, ERROR_CLOSE);
3858 * Calculate the full path name given a relative fid.
3860 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3861 struct smb_request *req,
3862 uint16_t root_dir_fid,
3863 const struct smb_filename *smb_fname,
3864 struct smb_filename **smb_fname_out)
3866 files_struct *dir_fsp;
3867 char *parent_fname = NULL;
3868 char *new_base_name = NULL;
3871 if (root_dir_fid == 0 || !smb_fname) {
3872 status = NT_STATUS_INTERNAL_ERROR;
3876 dir_fsp = file_fsp(req, root_dir_fid);
3878 if (dir_fsp == NULL) {
3879 status = NT_STATUS_INVALID_HANDLE;
3883 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3884 status = NT_STATUS_INVALID_HANDLE;
3888 if (!dir_fsp->is_directory) {
3891 * Check to see if this is a mac fork of some kind.
3894 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3895 is_ntfs_stream_smb_fname(smb_fname)) {
3896 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3901 we need to handle the case when we get a
3902 relative open relative to a file and the
3903 pathname is blank - this is a reopen!
3904 (hint from demyn plantenberg)
3907 status = NT_STATUS_INVALID_HANDLE;
3911 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3913 * We're at the toplevel dir, the final file name
3914 * must not contain ./, as this is filtered out
3915 * normally by srvstr_get_path and unix_convert
3916 * explicitly rejects paths containing ./.
3918 parent_fname = talloc_strdup(talloc_tos(), "");
3919 if (parent_fname == NULL) {
3920 status = NT_STATUS_NO_MEMORY;
3924 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3927 * Copy in the base directory name.
3930 parent_fname = talloc_array(talloc_tos(), char,
3932 if (parent_fname == NULL) {
3933 status = NT_STATUS_NO_MEMORY;
3936 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3940 * Ensure it ends in a '/'.
3941 * We used TALLOC_SIZE +2 to add space for the '/'.
3945 && (parent_fname[dir_name_len-1] != '\\')
3946 && (parent_fname[dir_name_len-1] != '/')) {
3947 parent_fname[dir_name_len] = '/';
3948 parent_fname[dir_name_len+1] = '\0';
3952 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3953 smb_fname->base_name);
3954 if (new_base_name == NULL) {
3955 status = NT_STATUS_NO_MEMORY;
3959 status = filename_convert(req,
3961 req->flags2 & FLAGS2_DFS_PATHNAMES,
3966 if (!NT_STATUS_IS_OK(status)) {
3971 TALLOC_FREE(parent_fname);
3972 TALLOC_FREE(new_base_name);
3976 NTSTATUS create_file_default(connection_struct *conn,
3977 struct smb_request *req,
3978 uint16_t root_dir_fid,
3979 struct smb_filename *smb_fname,
3980 uint32_t access_mask,
3981 uint32_t share_access,
3982 uint32_t create_disposition,
3983 uint32_t create_options,
3984 uint32_t file_attributes,
3985 uint32_t oplock_request,
3986 uint64_t allocation_size,
3987 uint32_t private_flags,
3988 struct security_descriptor *sd,
3989 struct ea_list *ea_list,
3990 files_struct **result,
3993 int info = FILE_WAS_OPENED;
3994 files_struct *fsp = NULL;
3996 bool stream_name = false;
3998 DEBUG(10,("create_file: access_mask = 0x%x "
3999 "file_attributes = 0x%x, share_access = 0x%x, "
4000 "create_disposition = 0x%x create_options = 0x%x "
4001 "oplock_request = 0x%x "
4002 "private_flags = 0x%x "
4003 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
4005 (unsigned int)access_mask,
4006 (unsigned int)file_attributes,
4007 (unsigned int)share_access,
4008 (unsigned int)create_disposition,
4009 (unsigned int)create_options,
4010 (unsigned int)oplock_request,
4011 (unsigned int)private_flags,
4012 (unsigned int)root_dir_fid,
4013 ea_list, sd, smb_fname_str_dbg(smb_fname)));
4016 * Calculate the filename from the root_dir_if if necessary.
4019 if (root_dir_fid != 0) {
4020 struct smb_filename *smb_fname_out = NULL;
4021 status = get_relative_fid_filename(conn, req, root_dir_fid,
4022 smb_fname, &smb_fname_out);
4023 if (!NT_STATUS_IS_OK(status)) {
4026 smb_fname = smb_fname_out;
4030 * Check to see if this is a mac fork of some kind.
4033 stream_name = is_ntfs_stream_smb_fname(smb_fname);
4035 enum FAKE_FILE_TYPE fake_file_type;
4037 fake_file_type = is_fake_file(smb_fname);
4039 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
4042 * Here we go! support for changing the disk quotas
4045 * We need to fake up to open this MAGIC QUOTA file
4046 * and return a valid FID.
4048 * w2k close this file directly after openening xp
4049 * also tries a QUERY_FILE_INFO on the file and then
4052 status = open_fake_file(req, conn, req->vuid,
4053 fake_file_type, smb_fname,
4055 if (!NT_STATUS_IS_OK(status)) {
4059 ZERO_STRUCT(smb_fname->st);
4063 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
4064 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
4069 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
4071 smb_fname->stream_name = NULL;
4072 /* We have to handle this error here. */
4073 if (create_options & FILE_DIRECTORY_FILE) {
4074 status = NT_STATUS_NOT_A_DIRECTORY;
4077 if (lp_posix_pathnames()) {
4078 ret = SMB_VFS_LSTAT(conn, smb_fname);
4080 ret = SMB_VFS_STAT(conn, smb_fname);
4083 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
4084 status = NT_STATUS_FILE_IS_A_DIRECTORY;
4089 status = create_file_unixpath(
4090 conn, req, smb_fname, access_mask, share_access,
4091 create_disposition, create_options, file_attributes,
4092 oplock_request, allocation_size, private_flags,
4096 if (!NT_STATUS_IS_OK(status)) {
4101 DEBUG(10, ("create_file: info=%d\n", info));
4104 if (pinfo != NULL) {
4107 return NT_STATUS_OK;
4110 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
4113 close_file(req, fsp, ERROR_CLOSE);