2 Unix SMB/CIFS implementation.
3 file opening and share modes
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 2001-2004
6 Copyright (C) Volker Lendecke 2005
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include "system/filesys.h"
25 #include "smbd/smbd.h"
26 #include "smbd/globals.h"
27 #include "fake_file.h"
28 #include "../libcli/security/security.h"
29 #include "../librpc/gen_ndr/ndr_security.h"
30 #include "../librpc/gen_ndr/open_files.h"
34 extern const struct generic_mapping file_generic_mapping;
36 struct deferred_open_record {
37 bool delayed_for_oplocks;
41 /****************************************************************************
42 If the requester wanted DELETE_ACCESS and was rejected because
43 the file ACL didn't include DELETE_ACCESS, see if the parent ACL
45 ****************************************************************************/
47 static bool parent_override_delete(connection_struct *conn,
48 const struct smb_filename *smb_fname,
50 uint32_t rejected_mask)
52 if ((access_mask & DELETE_ACCESS) &&
53 (rejected_mask & DELETE_ACCESS) &&
54 can_delete_file_in_directory(conn, smb_fname)) {
60 /****************************************************************************
61 Check if we have open rights.
62 ****************************************************************************/
64 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
65 const struct smb_filename *smb_fname,
68 /* Check if we have rights to open. */
70 struct security_descriptor *sd = NULL;
71 uint32_t rejected_share_access;
72 uint32_t rejected_mask = 0;
74 rejected_share_access = access_mask & ~(conn->share_access);
76 if (rejected_share_access) {
77 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
79 (unsigned int)access_mask,
80 smb_fname_str_dbg(smb_fname),
81 (unsigned int)rejected_share_access ));
82 return NT_STATUS_ACCESS_DENIED;
85 if (get_current_uid(conn) == (uid_t)0) {
86 /* I'm sorry sir, I didn't know you were root... */
87 DEBUG(10,("smbd_check_access_rights: root override "
88 "on %s. Granting 0x%x\n",
89 smb_fname_str_dbg(smb_fname),
90 (unsigned int)access_mask ));
94 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
95 DEBUG(10,("smbd_check_access_rights: not checking ACL "
96 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
97 smb_fname_str_dbg(smb_fname),
98 (unsigned int)access_mask ));
102 if (access_mask == DELETE_ACCESS && S_ISLNK(smb_fname->st.st_ex_mode)) {
103 /* We can always delete a symlink. */
104 DEBUG(10,("smbd_check_access_rights: not checking ACL "
105 "on DELETE_ACCESS on symlink %s.\n",
106 smb_fname_str_dbg(smb_fname) ));
110 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
115 if (!NT_STATUS_IS_OK(status)) {
116 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
118 smb_fname_str_dbg(smb_fname),
124 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
125 * owner WRITE_DAC and READ_CONTROL.
127 status = se_access_check(sd,
128 get_current_nttok(conn),
129 (access_mask & ~FILE_READ_ATTRIBUTES),
132 DEBUG(10,("smbd_check_access_rights: file %s requesting "
133 "0x%x returning 0x%x (%s)\n",
134 smb_fname_str_dbg(smb_fname),
135 (unsigned int)access_mask,
136 (unsigned int)rejected_mask,
137 nt_errstr(status) ));
139 if (!NT_STATUS_IS_OK(status)) {
140 if (DEBUGLEVEL >= 10) {
141 DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
142 smb_fname_str_dbg(smb_fname) ));
143 NDR_PRINT_DEBUG(security_descriptor, sd);
149 if (NT_STATUS_IS_OK(status) ||
150 !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
154 /* Here we know status == NT_STATUS_ACCESS_DENIED. */
155 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
156 (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
157 (lp_map_readonly(SNUM(conn)) ||
158 lp_map_archive(SNUM(conn)) ||
159 lp_map_hidden(SNUM(conn)) ||
160 lp_map_system(SNUM(conn)))) {
161 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
163 DEBUG(10,("smbd_check_access_rights: "
165 "FILE_WRITE_ATTRIBUTES "
167 smb_fname_str_dbg(smb_fname)));
170 if (parent_override_delete(conn,
174 /* Were we trying to do an open
175 * for delete and didn't get DELETE
176 * access (only) ? Check if the
177 * directory allows DELETE_CHILD.
179 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
182 rejected_mask &= ~DELETE_ACCESS;
184 DEBUG(10,("smbd_check_access_rights: "
188 smb_fname_str_dbg(smb_fname)));
191 if (rejected_mask != 0) {
192 return NT_STATUS_ACCESS_DENIED;
198 static NTSTATUS check_parent_access(struct connection_struct *conn,
199 struct smb_filename *smb_fname,
200 uint32_t access_mask,
201 char **pp_parent_dir)
204 char *parent_dir = NULL;
205 struct security_descriptor *parent_sd = NULL;
206 uint32_t access_granted = 0;
208 if (!parent_dirname(talloc_tos(),
209 smb_fname->base_name,
212 return NT_STATUS_NO_MEMORY;
216 *pp_parent_dir = parent_dir;
219 if (get_current_uid(conn) == (uid_t)0) {
220 /* I'm sorry sir, I didn't know you were root... */
221 DEBUG(10,("check_parent_access: root override "
222 "on %s. Granting 0x%x\n",
223 smb_fname_str_dbg(smb_fname),
224 (unsigned int)access_mask ));
228 status = SMB_VFS_GET_NT_ACL(conn,
233 if (!NT_STATUS_IS_OK(status)) {
234 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
235 "%s with error %s\n",
242 * Never test FILE_READ_ATTRIBUTES. se_access_check() also takes care of
243 * owner WRITE_DAC and READ_CONTROL.
245 status = se_access_check(parent_sd,
246 get_current_nttok(conn),
247 (access_mask & ~FILE_READ_ATTRIBUTES),
249 if(!NT_STATUS_IS_OK(status)) {
250 DEBUG(5,("check_parent_access: access check "
251 "on directory %s for "
252 "path %s for mask 0x%x returned (0x%x) %s\n",
254 smb_fname->base_name,
257 nt_errstr(status) ));
264 /****************************************************************************
265 fd support routines - attempt to do a dos_open.
266 ****************************************************************************/
268 static NTSTATUS fd_open(struct connection_struct *conn,
273 struct smb_filename *smb_fname = fsp->fsp_name;
274 NTSTATUS status = NT_STATUS_OK;
278 * Never follow symlinks on a POSIX client. The
279 * client should be doing this.
282 if (fsp->posix_open || !lp_symlinks(SNUM(conn))) {
287 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
288 if (fsp->fh->fd == -1) {
289 status = map_nt_error_from_unix(errno);
290 if (errno == EMFILE) {
291 static time_t last_warned = 0L;
293 if (time((time_t *) NULL) > last_warned) {
294 DEBUG(0,("Too many open files, unable "
295 "to open more! smbd's max "
297 lp_max_open_files()));
298 last_warned = time((time_t *) NULL);
304 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
305 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
306 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
311 /****************************************************************************
312 Close the file associated with a fsp.
313 ****************************************************************************/
315 NTSTATUS fd_close(files_struct *fsp)
322 if (fsp->fh->fd == -1) {
323 return NT_STATUS_OK; /* What we used to call a stat open. */
325 if (fsp->fh->ref_count > 1) {
326 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
329 ret = SMB_VFS_CLOSE(fsp);
332 return map_nt_error_from_unix(errno);
337 /****************************************************************************
338 Change the ownership of a file to that of the parent directory.
339 Do this by fd if possible.
340 ****************************************************************************/
342 void change_file_owner_to_parent(connection_struct *conn,
343 const char *inherit_from_dir,
346 struct smb_filename *smb_fname_parent = NULL;
350 status = create_synthetic_smb_fname(talloc_tos(), inherit_from_dir,
351 NULL, NULL, &smb_fname_parent);
352 if (!NT_STATUS_IS_OK(status)) {
356 ret = SMB_VFS_STAT(conn, smb_fname_parent);
358 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
359 "directory %s. Error was %s\n",
360 smb_fname_str_dbg(smb_fname_parent),
362 TALLOC_FREE(smb_fname_parent);
366 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
367 /* Already this uid - no need to change. */
368 DEBUG(10,("change_file_owner_to_parent: file %s "
369 "is already owned by uid %d\n",
371 (int)fsp->fsp_name->st.st_ex_uid ));
372 TALLOC_FREE(smb_fname_parent);
377 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
380 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
381 "file %s to parent directory uid %u. Error "
382 "was %s\n", fsp_str_dbg(fsp),
383 (unsigned int)smb_fname_parent->st.st_ex_uid,
386 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
387 "parent directory uid %u.\n", fsp_str_dbg(fsp),
388 (unsigned int)smb_fname_parent->st.st_ex_uid));
389 /* Ensure the uid entry is updated. */
390 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
393 TALLOC_FREE(smb_fname_parent);
396 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
397 const char *inherit_from_dir,
399 SMB_STRUCT_STAT *psbuf)
401 struct smb_filename *smb_fname_parent = NULL;
402 struct smb_filename *smb_fname_cwd = NULL;
403 char *saved_dir = NULL;
404 TALLOC_CTX *ctx = talloc_tos();
405 NTSTATUS status = NT_STATUS_OK;
408 status = create_synthetic_smb_fname(ctx, inherit_from_dir, NULL, NULL,
410 if (!NT_STATUS_IS_OK(status)) {
414 ret = SMB_VFS_STAT(conn, smb_fname_parent);
416 status = map_nt_error_from_unix(errno);
417 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
418 "directory %s. Error was %s\n",
419 smb_fname_str_dbg(smb_fname_parent),
424 /* We've already done an lstat into psbuf, and we know it's a
425 directory. If we can cd into the directory and the dev/ino
426 are the same then we can safely chown without races as
427 we're locking the directory in place by being in it. This
428 should work on any UNIX (thanks tridge :-). JRA.
431 saved_dir = vfs_GetWd(ctx,conn);
433 status = map_nt_error_from_unix(errno);
434 DEBUG(0,("change_dir_owner_to_parent: failed to get "
435 "current working directory. Error was %s\n",
440 /* Chdir into the new path. */
441 if (vfs_ChDir(conn, fname) == -1) {
442 status = map_nt_error_from_unix(errno);
443 DEBUG(0,("change_dir_owner_to_parent: failed to change "
444 "current working directory to %s. Error "
445 "was %s\n", fname, strerror(errno) ));
449 status = create_synthetic_smb_fname(ctx, ".", NULL, NULL,
451 if (!NT_STATUS_IS_OK(status)) {
455 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
457 status = map_nt_error_from_unix(errno);
458 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
459 "directory '.' (%s) Error was %s\n",
460 fname, strerror(errno)));
464 /* Ensure we're pointing at the same place. */
465 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
466 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
467 DEBUG(0,("change_dir_owner_to_parent: "
468 "device/inode on directory %s changed. "
469 "Refusing to chown !\n", fname ));
470 status = NT_STATUS_ACCESS_DENIED;
474 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
475 /* Already this uid - no need to change. */
476 DEBUG(10,("change_dir_owner_to_parent: directory %s "
477 "is already owned by uid %d\n",
479 (int)smb_fname_cwd->st.st_ex_uid ));
480 status = NT_STATUS_OK;
485 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
489 status = map_nt_error_from_unix(errno);
490 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
491 "directory %s to parent directory uid %u. "
492 "Error was %s\n", fname,
493 (unsigned int)smb_fname_parent->st.st_ex_uid,
496 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
497 "directory %s to parent directory uid %u.\n",
498 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
499 /* Ensure the uid entry is updated. */
500 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
504 vfs_ChDir(conn,saved_dir);
506 TALLOC_FREE(smb_fname_parent);
507 TALLOC_FREE(smb_fname_cwd);
511 /****************************************************************************
513 ****************************************************************************/
515 static NTSTATUS open_file(files_struct *fsp,
516 connection_struct *conn,
517 struct smb_request *req,
518 const char *parent_dir,
521 uint32 access_mask, /* client requested access mask. */
522 uint32 open_access_mask) /* what we're actually using in the open. */
524 struct smb_filename *smb_fname = fsp->fsp_name;
525 NTSTATUS status = NT_STATUS_OK;
526 int accmode = (flags & O_ACCMODE);
527 int local_flags = flags;
528 bool file_existed = VALID_STAT(fsp->fsp_name->st);
529 bool file_created = false;
534 /* Check permissions */
537 * This code was changed after seeing a client open request
538 * containing the open mode of (DENY_WRITE/read-only) with
539 * the 'create if not exist' bit set. The previous code
540 * would fail to open the file read only on a read-only share
541 * as it was checking the flags parameter directly against O_RDONLY,
542 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
546 if (!CAN_WRITE(conn)) {
547 /* It's a read-only share - fail if we wanted to write. */
548 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
549 DEBUG(3,("Permission denied opening %s\n",
550 smb_fname_str_dbg(smb_fname)));
551 return NT_STATUS_ACCESS_DENIED;
552 } else if(flags & O_CREAT) {
553 /* We don't want to write - but we must make sure that
554 O_CREAT doesn't create the file if we have write
555 access into the directory.
557 flags &= ~(O_CREAT|O_EXCL);
558 local_flags &= ~(O_CREAT|O_EXCL);
563 * This little piece of insanity is inspired by the
564 * fact that an NT client can open a file for O_RDONLY,
565 * but set the create disposition to FILE_EXISTS_TRUNCATE.
566 * If the client *can* write to the file, then it expects to
567 * truncate the file, even though it is opening for readonly.
568 * Quicken uses this stupid trick in backup file creation...
569 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
570 * for helping track this one down. It didn't bite us in 2.0.x
571 * as we always opened files read-write in that release. JRA.
574 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
575 DEBUG(10,("open_file: truncate requested on read-only open "
576 "for file %s\n", smb_fname_str_dbg(smb_fname)));
577 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
580 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
581 (!file_existed && (local_flags & O_CREAT)) ||
582 ((local_flags & O_TRUNC) == O_TRUNC) ) {
586 * We can't actually truncate here as the file may be locked.
587 * open_file_ntcreate will take care of the truncate later. JRA.
590 local_flags &= ~O_TRUNC;
592 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
594 * We would block on opening a FIFO with no one else on the
595 * other end. Do what we used to do and add O_NONBLOCK to the
599 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
600 local_flags |= O_NONBLOCK;
604 /* Don't create files with Microsoft wildcard characters. */
607 * wildcard characters are allowed in stream names
608 * only test the basefilename
610 wild = fsp->base_fsp->fsp_name->base_name;
612 wild = smb_fname->base_name;
614 if ((local_flags & O_CREAT) && !file_existed &&
616 return NT_STATUS_OBJECT_NAME_INVALID;
619 /* Can we access this file ? */
620 if (!fsp->base_fsp) {
621 /* Only do this check on non-stream open. */
623 status = smbd_check_access_rights(conn,
626 } else if (local_flags & O_CREAT){
627 status = check_parent_access(conn,
632 /* File didn't exist and no O_CREAT. */
633 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
635 if (!NT_STATUS_IS_OK(status)) {
636 DEBUG(10,("open_file: "
640 "smbd_check_access_rights" :
641 "check_parent_access",
642 smb_fname_str_dbg(smb_fname),
643 nt_errstr(status) ));
648 /* Actually do the open */
649 status = fd_open(conn, fsp, local_flags, unx_mode);
650 if (!NT_STATUS_IS_OK(status)) {
651 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
652 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
653 nt_errstr(status),local_flags,flags));
657 if ((local_flags & O_CREAT) && !file_existed) {
662 fsp->fh->fd = -1; /* What we used to call a stat open. */
664 /* File must exist for a stat open. */
665 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
668 status = smbd_check_access_rights(conn,
672 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
674 S_ISLNK(smb_fname->st.st_ex_mode)) {
675 /* This is a POSIX stat open for delete
676 * or rename on a symlink that points
678 DEBUG(10,("open_file: allowing POSIX "
679 "open on bad symlink %s\n",
680 smb_fname_str_dbg(smb_fname)));
681 status = NT_STATUS_OK;
684 if (!NT_STATUS_IS_OK(status)) {
685 DEBUG(10,("open_file: "
686 "smbd_check_access_rights on file "
688 smb_fname_str_dbg(smb_fname),
689 nt_errstr(status) ));
697 if (fsp->fh->fd == -1) {
698 ret = SMB_VFS_STAT(conn, smb_fname);
700 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
701 /* If we have an fd, this stat should succeed. */
703 DEBUG(0,("Error doing fstat on open file %s "
705 smb_fname_str_dbg(smb_fname),
710 /* For a non-io open, this stat failing means file not found. JRA */
712 status = map_nt_error_from_unix(errno);
718 bool need_re_stat = false;
719 /* Do all inheritance work after we've
720 done a successful stat call and filled
721 in the stat struct in fsp->fsp_name. */
723 /* Inherit the ACL if required */
724 if (lp_inherit_perms(SNUM(conn))) {
725 inherit_access_posix_acl(conn, parent_dir,
726 smb_fname->base_name,
731 /* Change the owner if required. */
732 if (lp_inherit_owner(SNUM(conn))) {
733 change_file_owner_to_parent(conn, parent_dir,
739 if (fsp->fh->fd == -1) {
740 ret = SMB_VFS_STAT(conn, smb_fname);
742 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
743 /* If we have an fd, this stat should succeed. */
745 DEBUG(0,("Error doing fstat on open file %s "
747 smb_fname_str_dbg(smb_fname),
753 notify_fname(conn, NOTIFY_ACTION_ADDED,
754 FILE_NOTIFY_CHANGE_FILE_NAME,
755 smb_fname->base_name);
760 * POSIX allows read-only opens of directories. We don't
761 * want to do this (we use a different code path for this)
762 * so catch a directory open and return an EISDIR. JRA.
765 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
768 return NT_STATUS_FILE_IS_A_DIRECTORY;
771 fsp->mode = smb_fname->st.st_ex_mode;
772 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
773 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
774 fsp->file_pid = req ? req->smbpid : 0;
775 fsp->can_lock = True;
776 fsp->can_read = (access_mask & (FILE_READ_DATA)) ? True : False;
777 if (!CAN_WRITE(conn)) {
778 fsp->can_write = False;
780 fsp->can_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ?
783 fsp->print_file = NULL;
784 fsp->modified = False;
785 fsp->sent_oplock_break = NO_BREAK_SENT;
786 fsp->is_directory = False;
787 if (conn->aio_write_behind_list &&
788 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
789 conn->case_sensitive)) {
790 fsp->aio_write_behind = True;
793 fsp->wcp = NULL; /* Write cache pointer. */
795 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
796 conn->session_info->unix_info->unix_name,
797 smb_fname_str_dbg(smb_fname),
798 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
799 conn->num_files_open));
805 /****************************************************************************
806 Check if we can open a file with a share mode.
807 Returns True if conflict, False if not.
808 ****************************************************************************/
810 static bool share_conflict(struct share_mode_entry *entry,
814 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
815 "entry->share_access = 0x%x, "
816 "entry->private_options = 0x%x\n",
817 (unsigned int)entry->access_mask,
818 (unsigned int)entry->share_access,
819 (unsigned int)entry->private_options));
821 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
822 (unsigned int)access_mask, (unsigned int)share_access));
824 if ((entry->access_mask & (FILE_WRITE_DATA|
828 DELETE_ACCESS)) == 0) {
829 DEBUG(10,("share_conflict: No conflict due to "
830 "entry->access_mask = 0x%x\n",
831 (unsigned int)entry->access_mask ));
835 if ((access_mask & (FILE_WRITE_DATA|
839 DELETE_ACCESS)) == 0) {
840 DEBUG(10,("share_conflict: No conflict due to "
841 "access_mask = 0x%x\n",
842 (unsigned int)access_mask ));
846 #if 1 /* JRA TEST - Superdebug. */
847 #define CHECK_MASK(num, am, right, sa, share) \
848 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
849 (unsigned int)(num), (unsigned int)(am), \
850 (unsigned int)(right), (unsigned int)(am)&(right) )); \
851 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
852 (unsigned int)(num), (unsigned int)(sa), \
853 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
854 if (((am) & (right)) && !((sa) & (share))) { \
855 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
856 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
857 (unsigned int)(share) )); \
861 #define CHECK_MASK(num, am, right, sa, share) \
862 if (((am) & (right)) && !((sa) & (share))) { \
863 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
864 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
865 (unsigned int)(share) )); \
870 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
871 share_access, FILE_SHARE_WRITE);
872 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
873 entry->share_access, FILE_SHARE_WRITE);
875 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
876 share_access, FILE_SHARE_READ);
877 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
878 entry->share_access, FILE_SHARE_READ);
880 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
881 share_access, FILE_SHARE_DELETE);
882 CHECK_MASK(6, access_mask, DELETE_ACCESS,
883 entry->share_access, FILE_SHARE_DELETE);
885 DEBUG(10,("share_conflict: No conflict.\n"));
889 #if defined(DEVELOPER)
890 static void validate_my_share_entries(struct smbd_server_connection *sconn,
892 struct share_mode_entry *share_entry)
896 if (!procid_is_me(&share_entry->pid)) {
900 if (is_deferred_open_entry(share_entry) &&
901 !open_was_deferred(sconn, share_entry->op_mid)) {
902 char *str = talloc_asprintf(talloc_tos(),
903 "Got a deferred entry without a request: "
905 share_mode_str(talloc_tos(), num, share_entry));
909 if (!is_valid_share_mode_entry(share_entry)) {
913 fsp = file_find_dif(sconn, share_entry->id,
914 share_entry->share_file_id);
916 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
917 share_mode_str(talloc_tos(), num, share_entry) ));
918 smb_panic("validate_my_share_entries: Cannot match a "
919 "share entry with an open file\n");
922 if (is_deferred_open_entry(share_entry)) {
926 if ((share_entry->op_type == NO_OPLOCK) &&
927 (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK)) {
928 /* Someone has already written to it, but I haven't yet
933 if (((uint16)fsp->oplock_type) != share_entry->op_type) {
942 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
943 share_mode_str(talloc_tos(), num, share_entry) ));
944 str = talloc_asprintf(talloc_tos(),
945 "validate_my_share_entries: "
946 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
947 fsp->fsp_name->base_name,
948 (unsigned int)fsp->oplock_type,
949 (unsigned int)share_entry->op_type );
955 bool is_stat_open(uint32 access_mask)
957 return (access_mask &&
958 ((access_mask & ~(SYNCHRONIZE_ACCESS| FILE_READ_ATTRIBUTES|
959 FILE_WRITE_ATTRIBUTES))==0) &&
960 ((access_mask & (SYNCHRONIZE_ACCESS|FILE_READ_ATTRIBUTES|
961 FILE_WRITE_ATTRIBUTES)) != 0));
964 /****************************************************************************
965 Deal with share modes
966 Invarient: Share mode must be locked on entry and exit.
967 Returns -1 on error, or number of share modes on success (may be zero).
968 ****************************************************************************/
970 static NTSTATUS open_mode_check(connection_struct *conn,
971 struct share_mode_lock *lck,
975 uint32 create_options,
980 if(lck->num_share_modes == 0) {
984 *file_existed = True;
986 /* A delete on close prohibits everything */
988 if (is_delete_on_close_set(lck, name_hash)) {
989 return NT_STATUS_DELETE_PENDING;
992 if (is_stat_open(access_mask)) {
993 /* Stat open that doesn't trigger oplock breaks or share mode
994 * checks... ! JRA. */
999 * Check if the share modes will give us access.
1002 #if defined(DEVELOPER)
1003 for(i = 0; i < lck->num_share_modes; i++) {
1004 validate_my_share_entries(conn->sconn, i,
1005 &lck->share_modes[i]);
1009 if (!lp_share_modes(SNUM(conn))) {
1010 return NT_STATUS_OK;
1013 /* Now we check the share modes, after any oplock breaks. */
1014 for(i = 0; i < lck->num_share_modes; i++) {
1016 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1020 /* someone else has a share lock on it, check to see if we can
1022 if (share_conflict(&lck->share_modes[i],
1023 access_mask, share_access)) {
1024 return NT_STATUS_SHARING_VIOLATION;
1028 return NT_STATUS_OK;
1031 static bool is_delete_request(files_struct *fsp) {
1032 return ((fsp->access_mask == DELETE_ACCESS) &&
1033 (fsp->oplock_type == NO_OPLOCK));
1037 * Send a break message to the oplock holder and delay the open for
1041 static NTSTATUS send_break_message(files_struct *fsp,
1042 struct share_mode_entry *exclusive,
1047 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1049 DEBUG(10, ("Sending break request to PID %s\n",
1050 procid_str_static(&exclusive->pid)));
1051 exclusive->op_mid = mid;
1053 /* Create the message. */
1054 share_mode_entry_to_message(msg, exclusive);
1056 /* Add in the FORCE_OPLOCK_BREAK_TO_NONE bit in the message if set. We
1057 don't want this set in the share mode struct pointed to by lck. */
1059 if (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE) {
1060 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,
1061 exclusive->op_type | FORCE_OPLOCK_BREAK_TO_NONE);
1064 status = messaging_send_buf(fsp->conn->sconn->msg_ctx, exclusive->pid,
1065 MSG_SMB_BREAK_REQUEST,
1067 MSG_SMB_SHARE_MODE_ENTRY_SIZE);
1068 if (!NT_STATUS_IS_OK(status)) {
1069 DEBUG(3, ("Could not send oplock break message: %s\n",
1070 nt_errstr(status)));
1077 * Return share_mode_entry pointers for :
1078 * 1). Batch oplock entry.
1079 * 2). Batch or exclusive oplock entry (may be identical to #1).
1080 * bool have_level2_oplock
1081 * bool have_no_oplock.
1082 * Do internal consistency checks on the share mode for a file.
1085 static void find_oplock_types(files_struct *fsp,
1087 struct share_mode_lock *lck,
1088 struct share_mode_entry **pp_batch,
1089 struct share_mode_entry **pp_ex_or_batch,
1091 bool *got_no_oplock)
1096 *pp_ex_or_batch = NULL;
1097 *got_level2 = false;
1098 *got_no_oplock = false;
1100 /* Ignore stat or internal opens, as is done in
1101 delay_for_batch_oplocks() and
1102 delay_for_exclusive_oplocks().
1104 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1108 for (i=0; i<lck->num_share_modes; i++) {
1109 if (!is_valid_share_mode_entry(&lck->share_modes[i])) {
1113 if (lck->share_modes[i].op_type == NO_OPLOCK &&
1114 is_stat_open(lck->share_modes[i].access_mask)) {
1115 /* We ignore stat opens in the table - they
1116 always have NO_OPLOCK and never get or
1117 cause breaks. JRA. */
1121 if (BATCH_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1122 /* batch - can only be one. */
1123 if (*pp_ex_or_batch || *pp_batch || *got_level2 || *got_no_oplock) {
1124 smb_panic("Bad batch oplock entry.");
1126 *pp_batch = &lck->share_modes[i];
1129 if (EXCLUSIVE_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1130 /* Exclusive or batch - can only be one. */
1131 if (*pp_ex_or_batch || *got_level2 || *got_no_oplock) {
1132 smb_panic("Bad exclusive or batch oplock entry.");
1134 *pp_ex_or_batch = &lck->share_modes[i];
1137 if (LEVEL_II_OPLOCK_TYPE(lck->share_modes[i].op_type)) {
1138 if (*pp_batch || *pp_ex_or_batch) {
1139 smb_panic("Bad levelII oplock entry.");
1144 if (lck->share_modes[i].op_type == NO_OPLOCK) {
1145 if (*pp_batch || *pp_ex_or_batch) {
1146 smb_panic("Bad no oplock entry.");
1148 *got_no_oplock = true;
1153 static bool delay_for_batch_oplocks(files_struct *fsp,
1156 struct share_mode_entry *batch_entry)
1158 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1161 if (batch_entry == NULL) {
1165 /* Found a batch oplock */
1166 send_break_message(fsp, batch_entry, mid, oplock_request);
1170 static bool delay_for_exclusive_oplocks(files_struct *fsp,
1173 struct share_mode_entry *ex_entry)
1177 if ((oplock_request & INTERNAL_OPEN_ONLY) || is_stat_open(fsp->access_mask)) {
1180 if (ex_entry == NULL) {
1184 /* Found an exclusive or batch oplock */
1186 delay_it = is_delete_request(fsp) ?
1187 BATCH_OPLOCK_TYPE(ex_entry->op_type) : true;
1193 send_break_message(fsp, ex_entry, mid, oplock_request);
1197 static void grant_fsp_oplock_type(files_struct *fsp,
1198 const struct byte_range_lock *br_lck,
1200 bool got_level2_oplock,
1201 bool got_a_none_oplock)
1203 bool allow_level2 = (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1204 lp_level2_oplocks(SNUM(fsp->conn));
1206 /* Start by granting what the client asked for,
1207 but ensure no SAMBA_PRIVATE bits can be set. */
1208 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1210 if (oplock_request & INTERNAL_OPEN_ONLY) {
1211 /* No oplocks on internal open. */
1212 fsp->oplock_type = NO_OPLOCK;
1213 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1214 fsp->oplock_type, fsp_str_dbg(fsp)));
1216 } else if (br_lck && br_lck->num_locks > 0) {
1217 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1219 fsp->oplock_type = NO_OPLOCK;
1222 if (is_stat_open(fsp->access_mask)) {
1223 /* Leave the value already set. */
1224 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1225 fsp->oplock_type, fsp_str_dbg(fsp)));
1230 * Match what was requested (fsp->oplock_type) with
1231 * what was found in the existing share modes.
1234 if (got_a_none_oplock) {
1235 fsp->oplock_type = NO_OPLOCK;
1236 } else if (got_level2_oplock) {
1237 if (fsp->oplock_type == NO_OPLOCK ||
1238 fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
1239 /* Store a level2 oplock, but don't tell the client */
1240 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1242 fsp->oplock_type = LEVEL_II_OPLOCK;
1245 /* All share_mode_entries are placeholders or deferred.
1246 * Silently upgrade to fake levelII if the client didn't
1247 * ask for an oplock. */
1248 if (fsp->oplock_type == NO_OPLOCK) {
1249 /* Store a level2 oplock, but don't tell the client */
1250 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1255 * Don't grant level2 to clients that don't want them
1256 * or if we've turned them off.
1258 if (fsp->oplock_type == LEVEL_II_OPLOCK && !allow_level2) {
1259 fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
1262 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1263 fsp->oplock_type, fsp_str_dbg(fsp)));
1266 bool request_timed_out(struct timeval request_time,
1267 struct timeval timeout)
1269 struct timeval now, end_time;
1271 end_time = timeval_sum(&request_time, &timeout);
1272 return (timeval_compare(&end_time, &now) < 0);
1275 /****************************************************************************
1276 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1277 ****************************************************************************/
1279 static void defer_open(struct share_mode_lock *lck,
1280 struct timeval request_time,
1281 struct timeval timeout,
1282 struct smb_request *req,
1283 struct deferred_open_record *state)
1287 /* Paranoia check */
1289 for (i=0; i<lck->num_share_modes; i++) {
1290 struct share_mode_entry *e = &lck->share_modes[i];
1292 if (is_deferred_open_entry(e) &&
1293 procid_is_me(&e->pid) &&
1294 (e->op_mid == req->mid)) {
1295 DEBUG(0, ("Trying to defer an already deferred "
1296 "request: mid=%llu, exiting\n",
1297 (unsigned long long)req->mid));
1298 exit_server("attempt to defer a deferred request");
1302 /* End paranoia check */
1304 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1305 "open entry for mid %llu\n",
1306 (unsigned int)request_time.tv_sec,
1307 (unsigned int)request_time.tv_usec,
1308 (unsigned long long)req->mid));
1310 if (!push_deferred_open_message_smb(req, request_time, timeout,
1311 state->id, (char *)state, sizeof(*state))) {
1312 exit_server("push_deferred_open_message_smb failed");
1314 add_deferred_open(lck, req->mid, request_time,
1315 sconn_server_id(req->sconn), state->id);
1319 /****************************************************************************
1320 On overwrite open ensure that the attributes match.
1321 ****************************************************************************/
1323 bool open_match_attributes(connection_struct *conn,
1324 uint32 old_dos_attr,
1325 uint32 new_dos_attr,
1326 mode_t existing_unx_mode,
1327 mode_t new_unx_mode,
1328 mode_t *returned_unx_mode)
1330 uint32 noarch_old_dos_attr, noarch_new_dos_attr;
1332 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1333 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1335 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
1336 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
1337 *returned_unx_mode = new_unx_mode;
1339 *returned_unx_mode = (mode_t)0;
1342 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
1343 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
1344 "returned_unx_mode = 0%o\n",
1345 (unsigned int)old_dos_attr,
1346 (unsigned int)existing_unx_mode,
1347 (unsigned int)new_dos_attr,
1348 (unsigned int)*returned_unx_mode ));
1350 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
1351 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1352 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
1353 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
1357 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
1358 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
1359 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
1366 /****************************************************************************
1367 Special FCB or DOS processing in the case of a sharing violation.
1368 Try and find a duplicated file handle.
1369 ****************************************************************************/
1371 NTSTATUS fcb_or_dos_open(struct smb_request *req,
1372 connection_struct *conn,
1373 files_struct *fsp_to_dup_into,
1374 const struct smb_filename *smb_fname,
1379 uint32 share_access,
1380 uint32 create_options)
1384 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
1385 "file %s.\n", smb_fname_str_dbg(smb_fname)));
1387 for(fsp = file_find_di_first(conn->sconn, id); fsp;
1388 fsp = file_find_di_next(fsp)) {
1390 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
1391 "vuid = %u, file_pid = %u, private_options = 0x%x "
1392 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
1393 fsp->fh->fd, (unsigned int)fsp->vuid,
1394 (unsigned int)fsp->file_pid,
1395 (unsigned int)fsp->fh->private_options,
1396 (unsigned int)fsp->access_mask ));
1398 if (fsp->fh->fd != -1 &&
1399 fsp->vuid == vuid &&
1400 fsp->file_pid == file_pid &&
1401 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
1402 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
1403 (fsp->access_mask & FILE_WRITE_DATA) &&
1404 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
1405 strequal(fsp->fsp_name->stream_name,
1406 smb_fname->stream_name)) {
1407 DEBUG(10,("fcb_or_dos_open: file match\n"));
1413 return NT_STATUS_NOT_FOUND;
1416 /* quite an insane set of semantics ... */
1417 if (is_executable(smb_fname->base_name) &&
1418 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
1419 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
1420 return NT_STATUS_INVALID_PARAMETER;
1423 /* We need to duplicate this fsp. */
1424 return dup_file_fsp(req, fsp, access_mask, share_access,
1425 create_options, fsp_to_dup_into);
1428 static void schedule_defer_open(struct share_mode_lock *lck,
1429 struct timeval request_time,
1430 struct smb_request *req)
1432 struct deferred_open_record state;
1434 /* This is a relative time, added to the absolute
1435 request_time value to get the absolute timeout time.
1436 Note that if this is the second or greater time we enter
1437 this codepath for this particular request mid then
1438 request_time is left as the absolute time of the *first*
1439 time this request mid was processed. This is what allows
1440 the request to eventually time out. */
1442 struct timeval timeout;
1444 /* Normally the smbd we asked should respond within
1445 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
1446 * the client did, give twice the timeout as a safety
1447 * measure here in case the other smbd is stuck
1448 * somewhere else. */
1450 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
1452 /* Nothing actually uses state.delayed_for_oplocks
1453 but it's handy to differentiate in debug messages
1454 between a 30 second delay due to oplock break, and
1455 a 1 second delay for share mode conflicts. */
1457 state.delayed_for_oplocks = True;
1460 if (!request_timed_out(request_time, timeout)) {
1461 defer_open(lck, request_time, timeout, req, &state);
1465 /****************************************************************************
1466 Work out what access_mask to use from what the client sent us.
1467 ****************************************************************************/
1469 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
1470 const struct smb_filename *smb_fname,
1472 uint32_t access_mask,
1473 uint32_t *access_mask_out)
1476 uint32_t orig_access_mask = access_mask;
1477 uint32_t rejected_share_access;
1480 * Convert GENERIC bits to specific bits.
1483 se_map_generic(&access_mask, &file_generic_mapping);
1485 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
1486 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
1487 if (get_current_uid(conn) == (uid_t)0) {
1488 access_mask |= FILE_GENERIC_ALL;
1489 } else if (file_existed) {
1491 struct security_descriptor *sd;
1492 uint32_t access_granted = 0;
1494 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
1499 if (!NT_STATUS_IS_OK(status)) {
1500 DEBUG(10,("smbd_calculate_access_mask: "
1501 "Could not get acl on file %s: %s\n",
1502 smb_fname_str_dbg(smb_fname),
1503 nt_errstr(status)));
1504 return NT_STATUS_ACCESS_DENIED;
1508 * Never test FILE_READ_ATTRIBUTES. se_access_check()
1509 * also takes care of owner WRITE_DAC and READ_CONTROL.
1511 status = se_access_check(sd,
1512 get_current_nttok(conn),
1513 (access_mask & ~FILE_READ_ATTRIBUTES),
1518 if (!NT_STATUS_IS_OK(status)) {
1519 DEBUG(10, ("smbd_calculate_access_mask: "
1520 "Access denied on file %s: "
1521 "when calculating maximum access\n",
1522 smb_fname_str_dbg(smb_fname)));
1523 return NT_STATUS_ACCESS_DENIED;
1526 access_mask = (access_granted | FILE_READ_ATTRIBUTES);
1528 access_mask = FILE_GENERIC_ALL;
1531 access_mask &= conn->share_access;
1534 rejected_share_access = access_mask & ~(conn->share_access);
1536 if (rejected_share_access) {
1537 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
1538 "file %s: rejected by share access mask[0x%08X] "
1539 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
1540 smb_fname_str_dbg(smb_fname),
1542 orig_access_mask, access_mask,
1543 rejected_share_access));
1544 return NT_STATUS_ACCESS_DENIED;
1547 *access_mask_out = access_mask;
1548 return NT_STATUS_OK;
1551 /****************************************************************************
1552 Remove the deferred open entry under lock.
1553 ****************************************************************************/
1555 void remove_deferred_open_entry(struct file_id id, uint64_t mid,
1556 struct server_id pid)
1558 struct share_mode_lock *lck = get_share_mode_lock(talloc_tos(), id,
1561 DEBUG(0, ("could not get share mode lock\n"));
1564 del_deferred_open_entry(lck, mid, pid);
1568 /****************************************************************
1569 Ensure we get the brlock lock followed by the share mode lock
1570 in the correct order to prevent deadlocks if other smbd's are
1571 using the brlock database on this file simultaneously with this open
1572 (that code also gets the locks in brlock -> share mode lock order).
1573 ****************************************************************/
1575 static bool acquire_ordered_locks(TALLOC_CTX *mem_ctx,
1577 const struct file_id id,
1578 const char *connectpath,
1579 const struct smb_filename *smb_fname,
1580 const struct timespec *p_old_write_time,
1581 struct share_mode_lock **p_lck,
1582 struct byte_range_lock **p_br_lck)
1584 /* Ordering - we must get the br_lck for this
1585 file before the share mode. */
1586 if (lp_locking(fsp->conn->params)) {
1587 *p_br_lck = brl_get_locks_readonly(fsp);
1588 if (*p_br_lck == NULL) {
1589 DEBUG(0, ("Could not get br_lock\n"));
1592 /* Note - we don't need to free the returned
1593 br_lck explicitly as it was allocated on talloc_tos()
1594 and so will be autofreed (and release the lock)
1595 once the frame context disappears.
1597 If it was set to fsp->brlock_rec then it was
1598 talloc_move'd to hang off the fsp pointer and
1599 in this case is guarenteed to not be holding the
1600 lock on the brlock database. */
1603 *p_lck = get_share_mode_lock(mem_ctx,
1609 if (*p_lck == NULL) {
1610 DEBUG(0, ("Could not get share mode lock\n"));
1611 TALLOC_FREE(*p_br_lck);
1617 /****************************************************************************
1618 Open a file with a share mode. Passed in an already created files_struct *.
1619 ****************************************************************************/
1621 static NTSTATUS open_file_ntcreate(connection_struct *conn,
1622 struct smb_request *req,
1623 uint32 access_mask, /* access bits (FILE_READ_DATA etc.) */
1624 uint32 share_access, /* share constants (FILE_SHARE_READ etc) */
1625 uint32 create_disposition, /* FILE_OPEN_IF etc. */
1626 uint32 create_options, /* options such as delete on close. */
1627 uint32 new_dos_attributes, /* attributes used for new file. */
1628 int oplock_request, /* internal Samba oplock codes. */
1629 /* Information (FILE_EXISTS etc.) */
1630 uint32_t private_flags, /* Samba specific flags. */
1634 struct smb_filename *smb_fname = fsp->fsp_name;
1637 bool file_existed = VALID_STAT(smb_fname->st);
1638 bool def_acl = False;
1639 bool posix_open = False;
1640 bool new_file_created = False;
1641 bool clear_ads = false;
1643 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
1644 mode_t new_unx_mode = (mode_t)0;
1645 mode_t unx_mode = (mode_t)0;
1647 uint32 existing_dos_attributes = 0;
1648 struct timeval request_time = timeval_zero();
1649 struct share_mode_lock *lck = NULL;
1650 uint32 open_access_mask = access_mask;
1656 if (conn->printer) {
1658 * Printers are handled completely differently.
1659 * Most of the passed parameters are ignored.
1663 *pinfo = FILE_WAS_CREATED;
1666 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
1667 smb_fname_str_dbg(smb_fname)));
1670 DEBUG(0,("open_file_ntcreate: printer open without "
1671 "an SMB request!\n"));
1672 return NT_STATUS_INTERNAL_ERROR;
1675 return print_spool_open(fsp, smb_fname->base_name,
1679 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
1681 return NT_STATUS_NO_MEMORY;
1684 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
1686 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
1687 new_dos_attributes = 0;
1689 /* Windows allows a new file to be created and
1690 silently removes a FILE_ATTRIBUTE_DIRECTORY
1691 sent by the client. Do the same. */
1693 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
1695 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
1697 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
1698 smb_fname, parent_dir);
1701 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
1702 "access_mask=0x%x share_access=0x%x "
1703 "create_disposition = 0x%x create_options=0x%x "
1704 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
1705 smb_fname_str_dbg(smb_fname), new_dos_attributes,
1706 access_mask, share_access, create_disposition,
1707 create_options, (unsigned int)unx_mode, oplock_request,
1708 (unsigned int)private_flags));
1710 if ((req == NULL) && ((oplock_request & INTERNAL_OPEN_ONLY) == 0)) {
1711 DEBUG(0, ("No smb request but not an internal only open!\n"));
1712 return NT_STATUS_INTERNAL_ERROR;
1716 * Only non-internal opens can be deferred at all
1721 if (get_deferred_open_message_state(req,
1725 struct deferred_open_record *state = (struct deferred_open_record *)ptr;
1726 /* Remember the absolute time of the original
1727 request with this mid. We'll use it later to
1728 see if this has timed out. */
1730 /* Remove the deferred open entry under lock. */
1731 remove_deferred_open_entry(
1732 state->id, req->mid,
1733 sconn_server_id(req->sconn));
1735 /* Ensure we don't reprocess this message. */
1736 remove_deferred_open_message_smb(req->sconn, req->mid);
1741 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
1743 existing_dos_attributes = dos_mode(conn, smb_fname);
1747 /* ignore any oplock requests if oplocks are disabled */
1748 if (!lp_oplocks(SNUM(conn)) ||
1749 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
1750 /* Mask off everything except the private Samba bits. */
1751 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
1754 /* this is for OS/2 long file names - say we don't support them */
1755 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
1756 /* OS/2 Workplace shell fix may be main code stream in a later
1758 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
1760 if (use_nt_status()) {
1761 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1763 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
1766 switch( create_disposition ) {
1768 * Currently we're using FILE_SUPERSEDE as the same as
1769 * FILE_OVERWRITE_IF but they really are
1770 * different. FILE_SUPERSEDE deletes an existing file
1771 * (requiring delete access) then recreates it.
1773 case FILE_SUPERSEDE:
1774 /* If file exists replace/overwrite. If file doesn't
1776 flags2 |= (O_CREAT | O_TRUNC);
1780 case FILE_OVERWRITE_IF:
1781 /* If file exists replace/overwrite. If file doesn't
1783 flags2 |= (O_CREAT | O_TRUNC);
1788 /* If file exists open. If file doesn't exist error. */
1789 if (!file_existed) {
1790 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
1791 "requested for file %s and file "
1793 smb_fname_str_dbg(smb_fname)));
1795 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1799 case FILE_OVERWRITE:
1800 /* If file exists overwrite. If file doesn't exist
1802 if (!file_existed) {
1803 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
1804 "requested for file %s and file "
1806 smb_fname_str_dbg(smb_fname) ));
1808 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1815 /* If file exists error. If file doesn't exist
1818 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
1819 "requested for file %s and file "
1820 "already exists.\n",
1821 smb_fname_str_dbg(smb_fname)));
1822 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
1827 return map_nt_error_from_unix(errno);
1829 flags2 |= (O_CREAT|O_EXCL);
1833 /* If file exists open. If file doesn't exist
1839 return NT_STATUS_INVALID_PARAMETER;
1842 /* We only care about matching attributes on file exists and
1845 if (!posix_open && file_existed && ((create_disposition == FILE_OVERWRITE) ||
1846 (create_disposition == FILE_OVERWRITE_IF))) {
1847 if (!open_match_attributes(conn, existing_dos_attributes,
1849 smb_fname->st.st_ex_mode,
1850 unx_mode, &new_unx_mode)) {
1851 DEBUG(5,("open_file_ntcreate: attributes missmatch "
1852 "for file %s (%x %x) (0%o, 0%o)\n",
1853 smb_fname_str_dbg(smb_fname),
1854 existing_dos_attributes,
1856 (unsigned int)smb_fname->st.st_ex_mode,
1857 (unsigned int)unx_mode ));
1859 return NT_STATUS_ACCESS_DENIED;
1863 status = smbd_calculate_access_mask(conn, smb_fname, file_existed,
1866 if (!NT_STATUS_IS_OK(status)) {
1867 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
1868 "on file %s returned %s\n",
1869 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
1873 open_access_mask = access_mask;
1875 if ((flags2 & O_TRUNC) || (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1876 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
1879 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
1880 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
1884 * Note that we ignore the append flag as append does not
1885 * mean the same thing under DOS and Unix.
1888 if ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) ||
1889 (oplock_request & FORCE_OPLOCK_BREAK_TO_NONE)) {
1890 /* DENY_DOS opens are always underlying read-write on the
1891 file handle, no matter what the requested access mask
1893 if ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
1894 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|FILE_READ_EA|FILE_EXECUTE)) {
1904 * Currently we only look at FILE_WRITE_THROUGH for create options.
1908 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
1913 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
1917 if (!posix_open && !CAN_WRITE(conn)) {
1919 * We should really return a permission denied error if either
1920 * O_CREAT or O_TRUNC are set, but for compatibility with
1921 * older versions of Samba we just AND them out.
1923 flags2 &= ~(O_CREAT|O_TRUNC);
1927 * Ensure we can't write on a read-only share or file.
1930 if (flags != O_RDONLY && file_existed &&
1931 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
1932 DEBUG(5,("open_file_ntcreate: write access requested for "
1933 "file %s on read only %s\n",
1934 smb_fname_str_dbg(smb_fname),
1935 !CAN_WRITE(conn) ? "share" : "file" ));
1937 return NT_STATUS_ACCESS_DENIED;
1940 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1941 fsp->share_access = share_access;
1942 fsp->fh->private_options = private_flags;
1943 fsp->access_mask = open_access_mask; /* We change this to the
1944 * requested access_mask after
1945 * the open is done. */
1946 fsp->posix_open = posix_open;
1948 /* Ensure no SAMBA_PRIVATE bits can be set. */
1949 fsp->oplock_type = (oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1951 if (timeval_is_zero(&request_time)) {
1952 request_time = fsp->open_time;
1956 struct byte_range_lock *br_lck = NULL;
1957 struct share_mode_entry *batch_entry = NULL;
1958 struct share_mode_entry *exclusive_entry = NULL;
1959 bool got_level2_oplock = false;
1960 bool got_a_none_oplock = false;
1962 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
1963 id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1965 if (!acquire_ordered_locks(talloc_tos(),
1973 return NT_STATUS_SHARING_VIOLATION;
1976 /* Get the types we need to examine. */
1977 find_oplock_types(fsp,
1983 &got_a_none_oplock);
1985 /* First pass - send break only on batch oplocks. */
1986 if ((req != NULL) &&
1987 delay_for_batch_oplocks(fsp,
1991 schedule_defer_open(lck, request_time, req);
1993 return NT_STATUS_SHARING_VIOLATION;
1996 /* Use the client requested access mask here, not the one we
1998 status = open_mode_check(conn, lck, fsp->name_hash,
1999 access_mask, share_access,
2000 create_options, &file_existed);
2002 if (NT_STATUS_IS_OK(status)) {
2003 /* We might be going to allow this open. Check oplock
2005 /* Second pass - send break for both batch or
2006 * exclusive oplocks. */
2007 if ((req != NULL) &&
2008 delay_for_exclusive_oplocks(
2013 schedule_defer_open(lck, request_time, req);
2015 return NT_STATUS_SHARING_VIOLATION;
2019 if (NT_STATUS_EQUAL(status, NT_STATUS_DELETE_PENDING)) {
2020 /* DELETE_PENDING is not deferred for a second */
2025 grant_fsp_oplock_type(fsp,
2031 if (!NT_STATUS_IS_OK(status)) {
2032 uint32 can_access_mask;
2033 bool can_access = True;
2035 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2037 /* Check if this can be done with the deny_dos and fcb
2040 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2041 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2043 DEBUG(0, ("DOS open without an SMB "
2046 return NT_STATUS_INTERNAL_ERROR;
2049 /* Use the client requested access mask here,
2050 * not the one we open with. */
2051 status = fcb_or_dos_open(req,
2062 if (NT_STATUS_IS_OK(status)) {
2065 *pinfo = FILE_WAS_OPENED;
2067 return NT_STATUS_OK;
2072 * This next line is a subtlety we need for
2073 * MS-Access. If a file open will fail due to share
2074 * permissions and also for security (access) reasons,
2075 * we need to return the access failed error, not the
2076 * share error. We can't open the file due to kernel
2077 * oplock deadlock (it's possible we failed above on
2078 * the open_mode_check()) so use a userspace check.
2081 if (flags & O_RDWR) {
2082 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2083 } else if (flags & O_WRONLY) {
2084 can_access_mask = FILE_WRITE_DATA;
2086 can_access_mask = FILE_READ_DATA;
2089 if (((can_access_mask & FILE_WRITE_DATA) &&
2090 !CAN_WRITE(conn)) ||
2091 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2092 smb_fname, can_access_mask))) {
2097 * If we're returning a share violation, ensure we
2098 * cope with the braindead 1 second delay.
2101 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2102 lp_defer_sharing_violations()) {
2103 struct timeval timeout;
2104 struct deferred_open_record state;
2107 /* this is a hack to speed up torture tests
2109 timeout_usecs = lp_parm_int(SNUM(conn),
2110 "smbd","sharedelay",
2111 SHARING_VIOLATION_USEC_WAIT);
2113 /* This is a relative time, added to the absolute
2114 request_time value to get the absolute timeout time.
2115 Note that if this is the second or greater time we enter
2116 this codepath for this particular request mid then
2117 request_time is left as the absolute time of the *first*
2118 time this request mid was processed. This is what allows
2119 the request to eventually time out. */
2121 timeout = timeval_set(0, timeout_usecs);
2123 /* Nothing actually uses state.delayed_for_oplocks
2124 but it's handy to differentiate in debug messages
2125 between a 30 second delay due to oplock break, and
2126 a 1 second delay for share mode conflicts. */
2128 state.delayed_for_oplocks = False;
2132 && !request_timed_out(request_time,
2134 defer_open(lck, request_time, timeout,
2142 * We have detected a sharing violation here
2143 * so return the correct error code
2145 status = NT_STATUS_SHARING_VIOLATION;
2147 status = NT_STATUS_ACCESS_DENIED;
2153 * We exit this block with the share entry *locked*.....
2157 SMB_ASSERT(!file_existed || (lck != NULL));
2160 * Ensure we pay attention to default ACLs on directories if required.
2163 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2164 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2165 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2168 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2169 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2170 (unsigned int)flags, (unsigned int)flags2,
2171 (unsigned int)unx_mode, (unsigned int)access_mask,
2172 (unsigned int)open_access_mask));
2175 * open_file strips any O_TRUNC flags itself.
2178 fsp_open = open_file(fsp, conn, req, parent_dir,
2179 flags|flags2, unx_mode, access_mask,
2182 if (!NT_STATUS_IS_OK(fsp_open)) {
2187 if (!file_existed) {
2188 struct byte_range_lock *br_lck = NULL;
2189 struct share_mode_entry *batch_entry = NULL;
2190 struct share_mode_entry *exclusive_entry = NULL;
2191 bool got_level2_oplock = false;
2192 bool got_a_none_oplock = false;
2193 struct timespec old_write_time = smb_fname->st.st_ex_mtime;
2195 * Deal with the race condition where two smbd's detect the
2196 * file doesn't exist and do the create at the same time. One
2197 * of them will win and set a share mode, the other (ie. this
2198 * one) should check if the requested share mode for this
2199 * create is allowed.
2203 * Now the file exists and fsp is successfully opened,
2204 * fsp->dev and fsp->inode are valid and should replace the
2205 * dev=0,inode=0 from a non existent file. Spotted by
2206 * Nadav Danieli <nadavd@exanet.com>. JRA.
2211 if (!acquire_ordered_locks(talloc_tos(),
2219 return NT_STATUS_SHARING_VIOLATION;
2222 /* Get the types we need to examine. */
2223 find_oplock_types(fsp,
2229 &got_a_none_oplock);
2231 /* First pass - send break only on batch oplocks. */
2232 if ((req != NULL) &&
2233 delay_for_batch_oplocks(fsp,
2237 schedule_defer_open(lck, request_time, req);
2240 return NT_STATUS_SHARING_VIOLATION;
2243 status = open_mode_check(conn, lck, fsp->name_hash,
2244 access_mask, share_access,
2245 create_options, &file_existed);
2247 if (NT_STATUS_IS_OK(status)) {
2248 /* We might be going to allow this open. Check oplock
2250 /* Second pass - send break for both batch or
2251 * exclusive oplocks. */
2252 if ((req != NULL) &&
2253 delay_for_exclusive_oplocks(
2258 schedule_defer_open(lck, request_time, req);
2261 return NT_STATUS_SHARING_VIOLATION;
2265 if (!NT_STATUS_IS_OK(status)) {
2266 struct deferred_open_record state;
2268 state.delayed_for_oplocks = False;
2271 /* Do it all over again immediately. In the second
2272 * round we will find that the file existed and handle
2273 * the DELETE_PENDING and FCB cases correctly. No need
2274 * to duplicate the code here. Essentially this is a
2275 * "goto top of this function", but don't tell
2279 defer_open(lck, request_time, timeval_zero(),
2287 grant_fsp_oplock_type(fsp,
2294 * We exit this block with the share entry *locked*.....
2299 SMB_ASSERT(lck != NULL);
2301 /* Delete streams if create_disposition requires it */
2302 if (file_existed && clear_ads &&
2303 !is_ntfs_stream_smb_fname(smb_fname)) {
2304 status = delete_all_streams(conn, smb_fname->base_name);
2305 if (!NT_STATUS_IS_OK(status)) {
2312 /* note that we ignore failure for the following. It is
2313 basically a hack for NFS, and NFS will never set one of
2314 these only read them. Nobody but Samba can ever set a deny
2315 mode and we have already checked our more authoritative
2316 locking database for permission to set this deny mode. If
2317 the kernel refuses the operations then the kernel is wrong.
2318 note that GPFS supports it as well - jmcd */
2320 if (fsp->fh->fd != -1) {
2322 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
2323 if(ret_flock == -1 ){
2328 return NT_STATUS_SHARING_VIOLATION;
2333 * At this point onwards, we can guarentee that the share entry
2334 * is locked, whether we created the file or not, and that the
2335 * deny mode is compatible with all current opens.
2339 * If requested, truncate the file.
2342 if (file_existed && (flags2&O_TRUNC)) {
2344 * We are modifing the file after open - update the stat
2347 if ((SMB_VFS_FTRUNCATE(fsp, 0) == -1) ||
2348 (SMB_VFS_FSTAT(fsp, &smb_fname->st)==-1)) {
2349 status = map_nt_error_from_unix(errno);
2357 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2358 * but we don't have to store this - just ignore it on access check.
2360 if (conn->sconn->using_smb2) {
2362 * SMB2 doesn't return it (according to Microsoft tests).
2363 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
2364 * File created with access = 0x7 (Read, Write, Delete)
2365 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
2367 fsp->access_mask = access_mask;
2369 /* But SMB1 does. */
2370 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2374 /* stat opens on existing files don't get oplocks. */
2375 if (is_stat_open(open_access_mask)) {
2376 fsp->oplock_type = NO_OPLOCK;
2379 if (flags2 & O_TRUNC) {
2380 info = FILE_WAS_OVERWRITTEN;
2382 info = FILE_WAS_OPENED;
2385 info = FILE_WAS_CREATED;
2393 * Setup the oplock info in both the shared memory and
2397 if (!set_file_oplock(fsp, fsp->oplock_type)) {
2399 * Could not get the kernel oplock or there are byte-range
2400 * locks on the file.
2402 fsp->oplock_type = NO_OPLOCK;
2405 if (info == FILE_WAS_OVERWRITTEN || info == FILE_WAS_CREATED || info == FILE_WAS_SUPERSEDED) {
2406 new_file_created = True;
2409 set_share_mode(lck, fsp, get_current_uid(conn),
2413 /* Handle strange delete on close create semantics. */
2414 if (create_options & FILE_DELETE_ON_CLOSE) {
2416 status = can_set_delete_on_close(fsp, new_dos_attributes);
2418 if (!NT_STATUS_IS_OK(status)) {
2419 /* Remember to delete the mode we just added. */
2420 del_share_mode(lck, fsp);
2425 /* Note that here we set the *inital* delete on close flag,
2426 not the regular one. The magic gets handled in close. */
2427 fsp->initial_delete_on_close = True;
2430 if (new_file_created) {
2431 /* Files should be initially set as archive */
2432 if (lp_map_archive(SNUM(conn)) ||
2433 lp_store_dos_attributes(SNUM(conn))) {
2435 if (file_set_dosmode(conn, smb_fname,
2436 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2437 parent_dir, true) == 0) {
2438 unx_mode = smb_fname->st.st_ex_mode;
2444 /* Determine sparse flag. */
2446 /* POSIX opens are sparse by default. */
2447 fsp->is_sparse = true;
2449 fsp->is_sparse = (file_existed &&
2450 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
2454 * Take care of inherited ACLs on created files - if default ACL not
2458 if (!posix_open && !file_existed && !def_acl) {
2460 int saved_errno = errno; /* We might get ENOSYS in the next
2463 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
2465 errno = saved_errno; /* Ignore ENOSYS */
2468 } else if (new_unx_mode) {
2472 /* Attributes need changing. File already existed. */
2475 int saved_errno = errno; /* We might get ENOSYS in the
2477 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
2479 if (ret == -1 && errno == ENOSYS) {
2480 errno = saved_errno; /* Ignore ENOSYS */
2482 DEBUG(5, ("open_file_ntcreate: reset "
2483 "attributes of file %s to 0%o\n",
2484 smb_fname_str_dbg(smb_fname),
2485 (unsigned int)new_unx_mode));
2486 ret = 0; /* Don't do the fchmod below. */
2491 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
2492 DEBUG(5, ("open_file_ntcreate: failed to reset "
2493 "attributes of file %s to 0%o\n",
2494 smb_fname_str_dbg(smb_fname),
2495 (unsigned int)new_unx_mode));
2498 /* If this is a successful open, we must remove any deferred open
2501 del_deferred_open_entry(lck, req->mid,
2502 sconn_server_id(req->sconn));
2506 return NT_STATUS_OK;
2510 /****************************************************************************
2511 Open a file for for write to ensure that we can fchmod it.
2512 ****************************************************************************/
2514 NTSTATUS open_file_fchmod(connection_struct *conn,
2515 struct smb_filename *smb_fname,
2516 files_struct **result)
2518 if (!VALID_STAT(smb_fname->st)) {
2519 return NT_STATUS_INVALID_PARAMETER;
2522 return SMB_VFS_CREATE_FILE(
2525 0, /* root_dir_fid */
2526 smb_fname, /* fname */
2527 FILE_WRITE_DATA, /* access_mask */
2528 (FILE_SHARE_READ | FILE_SHARE_WRITE | /* share_access */
2530 FILE_OPEN, /* create_disposition*/
2531 0, /* create_options */
2532 0, /* file_attributes */
2533 INTERNAL_OPEN_ONLY, /* oplock_request */
2534 0, /* allocation_size */
2535 0, /* private_flags */
2538 result, /* result */
2542 static NTSTATUS mkdir_internal(connection_struct *conn,
2543 struct smb_filename *smb_dname,
2544 uint32 file_attributes)
2547 char *parent_dir = NULL;
2549 bool posix_open = false;
2550 bool need_re_stat = false;
2551 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
2553 if(access_mask & ~(conn->share_access)) {
2554 DEBUG(5,("mkdir_internal: failing share access "
2555 "%s\n", lp_servicename(SNUM(conn))));
2556 return NT_STATUS_ACCESS_DENIED;
2559 status = check_name(conn, smb_dname->base_name);
2560 if (!NT_STATUS_IS_OK(status)) {
2564 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
2566 return NT_STATUS_NO_MEMORY;
2569 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2571 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2573 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
2576 status = check_parent_access(conn,
2580 if(!NT_STATUS_IS_OK(status)) {
2581 DEBUG(5,("mkdir_internal: check_parent_access "
2582 "on directory %s for path %s returned %s\n",
2584 smb_dname->base_name,
2585 nt_errstr(status) ));
2589 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
2590 return map_nt_error_from_unix(errno);
2593 /* Ensure we're checking for a symlink here.... */
2594 /* We don't want to get caught by a symlink racer. */
2596 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2597 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2598 smb_fname_str_dbg(smb_dname), strerror(errno)));
2599 return map_nt_error_from_unix(errno);
2602 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
2603 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
2604 smb_fname_str_dbg(smb_dname)));
2605 return NT_STATUS_NOT_A_DIRECTORY;
2608 if (lp_store_dos_attributes(SNUM(conn))) {
2610 file_set_dosmode(conn, smb_dname,
2611 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
2616 if (lp_inherit_perms(SNUM(conn))) {
2617 inherit_access_posix_acl(conn, parent_dir,
2618 smb_dname->base_name, mode);
2619 need_re_stat = true;
2624 * Check if high bits should have been set,
2625 * then (if bits are missing): add them.
2626 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
2629 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
2630 (mode & ~smb_dname->st.st_ex_mode)) {
2631 SMB_VFS_CHMOD(conn, smb_dname->base_name,
2632 (smb_dname->st.st_ex_mode |
2633 (mode & ~smb_dname->st.st_ex_mode)));
2634 need_re_stat = true;
2638 /* Change the owner if required. */
2639 if (lp_inherit_owner(SNUM(conn))) {
2640 change_dir_owner_to_parent(conn, parent_dir,
2641 smb_dname->base_name,
2643 need_re_stat = true;
2647 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
2648 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
2649 smb_fname_str_dbg(smb_dname), strerror(errno)));
2650 return map_nt_error_from_unix(errno);
2654 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
2655 smb_dname->base_name);
2657 return NT_STATUS_OK;
2660 /****************************************************************************
2661 Ensure we didn't get symlink raced on opening a directory.
2662 ****************************************************************************/
2664 bool check_same_stat(const SMB_STRUCT_STAT *sbuf1,
2665 const SMB_STRUCT_STAT *sbuf2)
2667 if (sbuf1->st_ex_uid != sbuf2->st_ex_uid ||
2668 sbuf1->st_ex_gid != sbuf2->st_ex_gid ||
2669 sbuf1->st_ex_dev != sbuf2->st_ex_dev ||
2670 sbuf1->st_ex_ino != sbuf2->st_ex_ino) {
2676 /****************************************************************************
2677 Open a directory from an NT SMB call.
2678 ****************************************************************************/
2680 static NTSTATUS open_directory(connection_struct *conn,
2681 struct smb_request *req,
2682 struct smb_filename *smb_dname,
2684 uint32 share_access,
2685 uint32 create_disposition,
2686 uint32 create_options,
2687 uint32 file_attributes,
2689 files_struct **result)
2691 files_struct *fsp = NULL;
2692 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
2693 struct share_mode_lock *lck = NULL;
2695 struct timespec mtimespec;
2698 SMB_ASSERT(!is_ntfs_stream_smb_fname(smb_dname));
2700 /* Ensure we have a directory attribute. */
2701 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
2703 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
2704 "share_access = 0x%x create_options = 0x%x, "
2705 "create_disposition = 0x%x, file_attributes = 0x%x\n",
2706 smb_fname_str_dbg(smb_dname),
2707 (unsigned int)access_mask,
2708 (unsigned int)share_access,
2709 (unsigned int)create_options,
2710 (unsigned int)create_disposition,
2711 (unsigned int)file_attributes));
2713 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
2714 (conn->fs_capabilities & FILE_NAMED_STREAMS) &&
2715 is_ntfs_stream_smb_fname(smb_dname)) {
2716 DEBUG(2, ("open_directory: %s is a stream name!\n",
2717 smb_fname_str_dbg(smb_dname)));
2718 return NT_STATUS_NOT_A_DIRECTORY;
2721 status = smbd_calculate_access_mask(conn, smb_dname, dir_existed,
2722 access_mask, &access_mask);
2723 if (!NT_STATUS_IS_OK(status)) {
2724 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
2725 "on file %s returned %s\n",
2726 smb_fname_str_dbg(smb_dname),
2727 nt_errstr(status)));
2731 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
2732 !security_token_has_privilege(get_current_nttok(conn),
2733 SEC_PRIV_SECURITY)) {
2734 DEBUG(10, ("open_directory: open on %s "
2735 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
2736 smb_fname_str_dbg(smb_dname)));
2737 return NT_STATUS_PRIVILEGE_NOT_HELD;
2740 switch( create_disposition ) {
2744 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2747 info = FILE_WAS_OPENED;
2752 /* If directory exists error. If directory doesn't
2756 status = NT_STATUS_OBJECT_NAME_COLLISION;
2757 DEBUG(2, ("open_directory: unable to create "
2758 "%s. Error was %s\n",
2759 smb_fname_str_dbg(smb_dname),
2760 nt_errstr(status)));
2764 status = mkdir_internal(conn, smb_dname,
2767 if (!NT_STATUS_IS_OK(status)) {
2768 DEBUG(2, ("open_directory: unable to create "
2769 "%s. Error was %s\n",
2770 smb_fname_str_dbg(smb_dname),
2771 nt_errstr(status)));
2775 info = FILE_WAS_CREATED;
2780 * If directory exists open. If directory doesn't
2785 status = NT_STATUS_OK;
2786 info = FILE_WAS_OPENED;
2788 status = mkdir_internal(conn, smb_dname,
2791 if (NT_STATUS_IS_OK(status)) {
2792 info = FILE_WAS_CREATED;
2794 /* Cope with create race. */
2795 if (!NT_STATUS_EQUAL(status,
2796 NT_STATUS_OBJECT_NAME_COLLISION)) {
2797 DEBUG(2, ("open_directory: unable to create "
2798 "%s. Error was %s\n",
2799 smb_fname_str_dbg(smb_dname),
2800 nt_errstr(status)));
2803 info = FILE_WAS_OPENED;
2809 case FILE_SUPERSEDE:
2810 case FILE_OVERWRITE:
2811 case FILE_OVERWRITE_IF:
2813 DEBUG(5,("open_directory: invalid create_disposition "
2814 "0x%x for directory %s\n",
2815 (unsigned int)create_disposition,
2816 smb_fname_str_dbg(smb_dname)));
2817 return NT_STATUS_INVALID_PARAMETER;
2820 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
2821 DEBUG(5,("open_directory: %s is not a directory !\n",
2822 smb_fname_str_dbg(smb_dname)));
2823 return NT_STATUS_NOT_A_DIRECTORY;
2826 if (info == FILE_WAS_OPENED) {
2827 status = smbd_check_access_rights(conn, smb_dname, access_mask);
2828 if (!NT_STATUS_IS_OK(status)) {
2829 DEBUG(10, ("open_directory: smbd_check_access_rights on "
2830 "file %s failed with %s\n",
2831 smb_fname_str_dbg(smb_dname),
2832 nt_errstr(status)));
2837 status = file_new(req, conn, &fsp);
2838 if(!NT_STATUS_IS_OK(status)) {
2843 * Setup the files_struct for it.
2846 fsp->mode = smb_dname->st.st_ex_mode;
2847 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
2848 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
2849 fsp->file_pid = req ? req->smbpid : 0;
2850 fsp->can_lock = False;
2851 fsp->can_read = False;
2852 fsp->can_write = False;
2854 fsp->share_access = share_access;
2855 fsp->fh->private_options = 0;
2857 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
2859 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
2860 fsp->print_file = NULL;
2861 fsp->modified = False;
2862 fsp->oplock_type = NO_OPLOCK;
2863 fsp->sent_oplock_break = NO_BREAK_SENT;
2864 fsp->is_directory = True;
2865 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
2866 status = fsp_set_smb_fname(fsp, smb_dname);
2867 if (!NT_STATUS_IS_OK(status)) {
2868 file_free(req, fsp);
2872 mtimespec = smb_dname->st.st_ex_mtime;
2875 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
2877 /* POSIX allows us to open a directory with O_RDONLY. */
2878 status = fd_open(conn, fsp, O_RDONLY, 0);
2880 if (!NT_STATUS_IS_OK(status)) {
2881 DEBUG(5, ("open_directory: Could not open fd for "
2883 smb_fname_str_dbg(smb_dname),
2884 nt_errstr(status)));
2885 file_free(req, fsp);
2889 status = vfs_stat_fsp(fsp);
2890 if (!NT_STATUS_IS_OK(status)) {
2892 file_free(req, fsp);
2896 /* Ensure there was no race condition. */
2897 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
2898 DEBUG(5,("open_directory: stat struct differs for "
2900 smb_fname_str_dbg(smb_dname)));
2902 file_free(req, fsp);
2903 return NT_STATUS_ACCESS_DENIED;
2906 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
2907 conn->connectpath, smb_dname, &mtimespec);
2910 DEBUG(0, ("open_directory: Could not get share mode lock for "
2911 "%s\n", smb_fname_str_dbg(smb_dname)));
2913 file_free(req, fsp);
2914 return NT_STATUS_SHARING_VIOLATION;
2917 status = open_mode_check(conn, lck, fsp->name_hash,
2918 access_mask, share_access,
2919 create_options, &dir_existed);
2921 if (!NT_STATUS_IS_OK(status)) {
2924 file_free(req, fsp);
2928 set_share_mode(lck, fsp, get_current_uid(conn),
2929 req ? req->mid : 0, NO_OPLOCK);
2931 /* For directories the delete on close bit at open time seems
2932 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
2933 if (create_options & FILE_DELETE_ON_CLOSE) {
2934 status = can_set_delete_on_close(fsp, 0);
2935 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
2938 file_free(req, fsp);
2942 if (NT_STATUS_IS_OK(status)) {
2943 /* Note that here we set the *inital* delete on close flag,
2944 not the regular one. The magic gets handled in close. */
2945 fsp->initial_delete_on_close = True;
2956 return NT_STATUS_OK;
2959 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
2960 struct smb_filename *smb_dname)
2965 status = SMB_VFS_CREATE_FILE(
2968 0, /* root_dir_fid */
2969 smb_dname, /* fname */
2970 FILE_READ_ATTRIBUTES, /* access_mask */
2971 FILE_SHARE_NONE, /* share_access */
2972 FILE_CREATE, /* create_disposition*/
2973 FILE_DIRECTORY_FILE, /* create_options */
2974 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
2975 0, /* oplock_request */
2976 0, /* allocation_size */
2977 0, /* private_flags */
2983 if (NT_STATUS_IS_OK(status)) {
2984 close_file(req, fsp, NORMAL_CLOSE);
2990 /****************************************************************************
2991 Receive notification that one of our open files has been renamed by another
2993 ****************************************************************************/
2995 void msg_file_was_renamed(struct messaging_context *msg,
2998 struct server_id server_id,
3002 char *frm = (char *)data->data;
3004 const char *sharepath;
3005 const char *base_name;
3006 const char *stream_name;
3007 struct smb_filename *smb_fname = NULL;
3008 size_t sp_len, bn_len;
3010 struct smbd_server_connection *sconn =
3011 talloc_get_type_abort(private_data,
3012 struct smbd_server_connection);
3014 if (data->data == NULL
3015 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3016 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3017 (int)data->length));
3021 /* Unpack the message. */
3022 pull_file_id_24(frm, &id);
3023 sharepath = &frm[24];
3024 sp_len = strlen(sharepath);
3025 base_name = sharepath + sp_len + 1;
3026 bn_len = strlen(base_name);
3027 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3029 /* stream_name must always be NULL if there is no stream. */
3030 if (stream_name[0] == '\0') {
3034 status = create_synthetic_smb_fname(talloc_tos(), base_name,
3035 stream_name, NULL, &smb_fname);
3036 if (!NT_STATUS_IS_OK(status)) {
3040 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3042 sharepath, smb_fname_str_dbg(smb_fname),
3043 file_id_string_tos(&id)));
3045 for(fsp = file_find_di_first(sconn, id); fsp;
3046 fsp = file_find_di_next(fsp)) {
3047 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3049 DEBUG(10,("msg_file_was_renamed: renaming file fnum %d from %s -> %s\n",
3050 fsp->fnum, fsp_str_dbg(fsp),
3051 smb_fname_str_dbg(smb_fname)));
3052 status = fsp_set_smb_fname(fsp, smb_fname);
3053 if (!NT_STATUS_IS_OK(status)) {
3058 /* Now we have the complete path we can work out if this is
3059 actually within this share and adjust newname accordingly. */
3060 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3061 "not sharepath %s) "
3062 "fnum %d from %s -> %s\n",
3063 fsp->conn->connectpath,
3067 smb_fname_str_dbg(smb_fname)));
3071 TALLOC_FREE(smb_fname);
3076 * If a main file is opened for delete, all streams need to be checked for
3077 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3078 * If that works, delete them all by setting the delete on close and close.
3081 NTSTATUS open_streams_for_delete(connection_struct *conn,
3084 struct stream_struct *stream_info = NULL;
3085 files_struct **streams = NULL;
3087 unsigned int num_streams = 0;
3088 TALLOC_CTX *frame = talloc_stackframe();
3091 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3092 &num_streams, &stream_info);
3094 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3095 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3096 DEBUG(10, ("no streams around\n"));
3098 return NT_STATUS_OK;
3101 if (!NT_STATUS_IS_OK(status)) {
3102 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3103 nt_errstr(status)));
3107 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3110 if (num_streams == 0) {
3112 return NT_STATUS_OK;
3115 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3116 if (streams == NULL) {
3117 DEBUG(0, ("talloc failed\n"));
3118 status = NT_STATUS_NO_MEMORY;
3122 for (i=0; i<num_streams; i++) {
3123 struct smb_filename *smb_fname = NULL;
3125 if (strequal(stream_info[i].name, "::$DATA")) {
3130 status = create_synthetic_smb_fname(talloc_tos(), fname,
3131 stream_info[i].name,
3133 if (!NT_STATUS_IS_OK(status)) {
3137 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3138 DEBUG(10, ("Unable to stat stream: %s\n",
3139 smb_fname_str_dbg(smb_fname)));
3142 status = SMB_VFS_CREATE_FILE(
3145 0, /* root_dir_fid */
3146 smb_fname, /* fname */
3147 DELETE_ACCESS, /* access_mask */
3148 (FILE_SHARE_READ | /* share_access */
3149 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3150 FILE_OPEN, /* create_disposition*/
3151 0, /* create_options */
3152 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3153 0, /* oplock_request */
3154 0, /* allocation_size */
3155 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3158 &streams[i], /* result */
3161 if (!NT_STATUS_IS_OK(status)) {
3162 DEBUG(10, ("Could not open stream %s: %s\n",
3163 smb_fname_str_dbg(smb_fname),
3164 nt_errstr(status)));
3166 TALLOC_FREE(smb_fname);
3169 TALLOC_FREE(smb_fname);
3173 * don't touch the variable "status" beyond this point :-)
3176 for (i -= 1 ; i >= 0; i--) {
3177 if (streams[i] == NULL) {
3181 DEBUG(10, ("Closing stream # %d, %s\n", i,
3182 fsp_str_dbg(streams[i])));
3183 close_file(NULL, streams[i], NORMAL_CLOSE);
3191 /*********************************************************************
3192 Create a default ACL by inheriting from the parent. If no inheritance
3193 from the parent available, don't set anything. This will leave the actual
3194 permissions the new file or directory already got from the filesystem
3195 as the NT ACL when read.
3196 *********************************************************************/
3198 static NTSTATUS inherit_new_acl(files_struct *fsp)
3200 TALLOC_CTX *ctx = talloc_tos();
3201 char *parent_name = NULL;
3202 struct security_descriptor *parent_desc = NULL;
3203 NTSTATUS status = NT_STATUS_OK;
3204 struct security_descriptor *psd = NULL;
3205 struct dom_sid *owner_sid = NULL;
3206 struct dom_sid *group_sid = NULL;
3207 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3208 bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3209 bool inheritable_components = false;
3212 if (!parent_dirname(ctx, fsp->fsp_name->base_name, &parent_name, NULL)) {
3213 return NT_STATUS_NO_MEMORY;
3216 status = SMB_VFS_GET_NT_ACL(fsp->conn,
3218 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3220 if (!NT_STATUS_IS_OK(status)) {
3224 inheritable_components = sd_has_inheritable_components(parent_desc,
3227 if (!inheritable_components && !inherit_owner) {
3228 /* Nothing to inherit and not setting owner. */
3229 return NT_STATUS_OK;
3232 /* Create an inherited descriptor from the parent. */
3234 if (DEBUGLEVEL >= 10) {
3235 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
3236 fsp_str_dbg(fsp) ));
3237 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
3240 /* Inherit from parent descriptor if "inherit owner" set. */
3241 if (inherit_owner) {
3242 owner_sid = parent_desc->owner_sid;
3243 group_sid = parent_desc->group_sid;
3246 if (owner_sid == NULL) {
3247 owner_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
3249 if (group_sid == NULL) {
3250 group_sid = &fsp->conn->session_info->security_token->sids[PRIMARY_GROUP_SID_INDEX];
3253 status = se_create_child_secdesc(ctx,
3260 if (!NT_STATUS_IS_OK(status)) {
3264 /* If inheritable_components == false,
3265 se_create_child_secdesc()
3266 creates a security desriptor with a NULL dacl
3267 entry, but with SEC_DESC_DACL_PRESENT. We need
3268 to remove that flag. */
3270 if (!inheritable_components) {
3271 security_info_sent &= ~SECINFO_DACL;
3272 psd->type &= ~SEC_DESC_DACL_PRESENT;
3275 if (DEBUGLEVEL >= 10) {
3276 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
3277 fsp_str_dbg(fsp) ));
3278 NDR_PRINT_DEBUG(security_descriptor, psd);
3281 if (inherit_owner) {
3282 /* We need to be root to force this. */
3285 status = SMB_VFS_FSET_NT_ACL(fsp,
3288 if (inherit_owner) {
3295 * Wrapper around open_file_ntcreate and open_directory
3298 static NTSTATUS create_file_unixpath(connection_struct *conn,
3299 struct smb_request *req,
3300 struct smb_filename *smb_fname,
3301 uint32_t access_mask,
3302 uint32_t share_access,
3303 uint32_t create_disposition,
3304 uint32_t create_options,
3305 uint32_t file_attributes,
3306 uint32_t oplock_request,
3307 uint64_t allocation_size,
3308 uint32_t private_flags,
3309 struct security_descriptor *sd,
3310 struct ea_list *ea_list,
3312 files_struct **result,
3315 int info = FILE_WAS_OPENED;
3316 files_struct *base_fsp = NULL;
3317 files_struct *fsp = NULL;
3320 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
3321 "file_attributes = 0x%x, share_access = 0x%x, "
3322 "create_disposition = 0x%x create_options = 0x%x "
3323 "oplock_request = 0x%x private_flags = 0x%x "
3324 "ea_list = 0x%p, sd = 0x%p, "
3326 (unsigned int)access_mask,
3327 (unsigned int)file_attributes,
3328 (unsigned int)share_access,
3329 (unsigned int)create_disposition,
3330 (unsigned int)create_options,
3331 (unsigned int)oplock_request,
3332 (unsigned int)private_flags,
3333 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3335 if (create_options & FILE_OPEN_BY_FILE_ID) {
3336 status = NT_STATUS_NOT_SUPPORTED;
3340 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
3341 status = NT_STATUS_INVALID_PARAMETER;
3346 oplock_request |= INTERNAL_OPEN_ONLY;
3349 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3350 && (access_mask & DELETE_ACCESS)
3351 && !is_ntfs_stream_smb_fname(smb_fname)) {
3353 * We can't open a file with DELETE access if any of the
3354 * streams is open without FILE_SHARE_DELETE
3356 status = open_streams_for_delete(conn, smb_fname->base_name);
3358 if (!NT_STATUS_IS_OK(status)) {
3363 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3364 !security_token_has_privilege(get_current_nttok(conn),
3365 SEC_PRIV_SECURITY)) {
3366 DEBUG(10, ("create_file_unixpath: open on %s "
3367 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3368 smb_fname_str_dbg(smb_fname)));
3369 status = NT_STATUS_PRIVILEGE_NOT_HELD;
3373 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
3374 && is_ntfs_stream_smb_fname(smb_fname)
3375 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
3376 uint32 base_create_disposition;
3377 struct smb_filename *smb_fname_base = NULL;
3379 if (create_options & FILE_DIRECTORY_FILE) {
3380 status = NT_STATUS_NOT_A_DIRECTORY;
3384 switch (create_disposition) {
3386 base_create_disposition = FILE_OPEN;
3389 base_create_disposition = FILE_OPEN_IF;
3393 /* Create an smb_filename with stream_name == NULL. */
3394 status = create_synthetic_smb_fname(talloc_tos(),
3395 smb_fname->base_name,
3398 if (!NT_STATUS_IS_OK(status)) {
3402 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
3403 DEBUG(10, ("Unable to stat stream: %s\n",
3404 smb_fname_str_dbg(smb_fname_base)));
3407 /* Open the base file. */
3408 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
3411 | FILE_SHARE_DELETE,
3412 base_create_disposition,
3413 0, 0, 0, 0, 0, NULL, NULL,
3415 TALLOC_FREE(smb_fname_base);
3417 if (!NT_STATUS_IS_OK(status)) {
3418 DEBUG(10, ("create_file_unixpath for base %s failed: "
3419 "%s\n", smb_fname->base_name,
3420 nt_errstr(status)));
3423 /* we don't need to low level fd */
3428 * If it's a request for a directory open, deal with it separately.
3431 if (create_options & FILE_DIRECTORY_FILE) {
3433 if (create_options & FILE_NON_DIRECTORY_FILE) {
3434 status = NT_STATUS_INVALID_PARAMETER;
3438 /* Can't open a temp directory. IFS kit test. */
3439 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
3440 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
3441 status = NT_STATUS_INVALID_PARAMETER;
3446 * We will get a create directory here if the Win32
3447 * app specified a security descriptor in the
3448 * CreateDirectory() call.
3452 status = open_directory(
3453 conn, req, smb_fname, access_mask, share_access,
3454 create_disposition, create_options, file_attributes,
3459 * Ordinary file case.
3462 status = file_new(req, conn, &fsp);
3463 if(!NT_STATUS_IS_OK(status)) {
3467 status = fsp_set_smb_fname(fsp, smb_fname);
3468 if (!NT_STATUS_IS_OK(status)) {
3473 * We're opening the stream element of a base_fsp
3474 * we already opened. Set up the base_fsp pointer.
3477 fsp->base_fsp = base_fsp;
3480 status = open_file_ntcreate(conn,
3492 if(!NT_STATUS_IS_OK(status)) {
3493 file_free(req, fsp);
3497 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
3499 /* A stream open never opens a directory */
3502 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3507 * Fail the open if it was explicitly a non-directory
3511 if (create_options & FILE_NON_DIRECTORY_FILE) {
3512 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3517 status = open_directory(
3518 conn, req, smb_fname, access_mask,
3519 share_access, create_disposition,
3520 create_options, file_attributes,
3525 if (!NT_STATUS_IS_OK(status)) {
3529 fsp->base_fsp = base_fsp;
3531 if ((ea_list != NULL) &&
3532 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
3533 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
3534 if (!NT_STATUS_IS_OK(status)) {
3539 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
3540 status = NT_STATUS_ACCESS_DENIED;
3544 /* Save the requested allocation size. */
3545 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
3547 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
3548 fsp->initial_allocation_size = smb_roundup(
3549 fsp->conn, allocation_size);
3550 if (fsp->is_directory) {
3551 /* Can't set allocation size on a directory. */
3552 status = NT_STATUS_ACCESS_DENIED;
3555 if (vfs_allocate_file_space(
3556 fsp, fsp->initial_allocation_size) == -1) {
3557 status = NT_STATUS_DISK_FULL;
3561 fsp->initial_allocation_size = smb_roundup(
3562 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
3566 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
3567 fsp->base_fsp == NULL) {
3570 * According to the MS documentation, the only time the security
3571 * descriptor is applied to the opened file is iff we *created* the
3572 * file; an existing file stays the same.
3574 * Also, it seems (from observation) that you can open the file with
3575 * any access mask but you can still write the sd. We need to override
3576 * the granted access before we call set_sd
3577 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
3580 uint32_t sec_info_sent;
3581 uint32_t saved_access_mask = fsp->access_mask;
3583 sec_info_sent = get_sec_info(sd);
3585 fsp->access_mask = FILE_GENERIC_ALL;
3587 /* Convert all the generic bits. */
3588 security_acl_map_generic(sd->dacl, &file_generic_mapping);
3589 security_acl_map_generic(sd->sacl, &file_generic_mapping);
3591 if (sec_info_sent & (SECINFO_OWNER|
3595 status = SMB_VFS_FSET_NT_ACL(fsp, sec_info_sent, sd);
3598 fsp->access_mask = saved_access_mask;
3600 if (!NT_STATUS_IS_OK(status)) {
3603 } else if (lp_inherit_acls(SNUM(conn))) {
3604 /* Inherit from parent. Errors here are not fatal. */
3605 status = inherit_new_acl(fsp);
3606 if (!NT_STATUS_IS_OK(status)) {
3607 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
3609 nt_errstr(status) ));
3614 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
3617 if (pinfo != NULL) {
3621 smb_fname->st = fsp->fsp_name->st;
3623 return NT_STATUS_OK;
3626 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
3629 if (base_fsp && fsp->base_fsp == base_fsp) {
3631 * The close_file below will close
3636 close_file(req, fsp, ERROR_CLOSE);
3639 if (base_fsp != NULL) {
3640 close_file(req, base_fsp, ERROR_CLOSE);
3647 * Calculate the full path name given a relative fid.
3649 NTSTATUS get_relative_fid_filename(connection_struct *conn,
3650 struct smb_request *req,
3651 uint16_t root_dir_fid,
3652 const struct smb_filename *smb_fname,
3653 struct smb_filename **smb_fname_out)
3655 files_struct *dir_fsp;
3656 char *parent_fname = NULL;
3657 char *new_base_name = NULL;
3660 if (root_dir_fid == 0 || !smb_fname) {
3661 status = NT_STATUS_INTERNAL_ERROR;
3665 dir_fsp = file_fsp(req, root_dir_fid);
3667 if (dir_fsp == NULL) {
3668 status = NT_STATUS_INVALID_HANDLE;
3672 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
3673 status = NT_STATUS_INVALID_HANDLE;
3677 if (!dir_fsp->is_directory) {
3680 * Check to see if this is a mac fork of some kind.
3683 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
3684 is_ntfs_stream_smb_fname(smb_fname)) {
3685 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
3690 we need to handle the case when we get a
3691 relative open relative to a file and the
3692 pathname is blank - this is a reopen!
3693 (hint from demyn plantenberg)
3696 status = NT_STATUS_INVALID_HANDLE;
3700 if (ISDOT(dir_fsp->fsp_name->base_name)) {
3702 * We're at the toplevel dir, the final file name
3703 * must not contain ./, as this is filtered out
3704 * normally by srvstr_get_path and unix_convert
3705 * explicitly rejects paths containing ./.
3707 parent_fname = talloc_strdup(talloc_tos(), "");
3708 if (parent_fname == NULL) {
3709 status = NT_STATUS_NO_MEMORY;
3713 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
3716 * Copy in the base directory name.
3719 parent_fname = talloc_array(talloc_tos(), char,
3721 if (parent_fname == NULL) {
3722 status = NT_STATUS_NO_MEMORY;
3725 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
3729 * Ensure it ends in a '/'.
3730 * We used TALLOC_SIZE +2 to add space for the '/'.
3734 && (parent_fname[dir_name_len-1] != '\\')
3735 && (parent_fname[dir_name_len-1] != '/')) {
3736 parent_fname[dir_name_len] = '/';
3737 parent_fname[dir_name_len+1] = '\0';
3741 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
3742 smb_fname->base_name);
3743 if (new_base_name == NULL) {
3744 status = NT_STATUS_NO_MEMORY;
3748 status = filename_convert(req,
3750 req->flags2 & FLAGS2_DFS_PATHNAMES,
3755 if (!NT_STATUS_IS_OK(status)) {
3760 TALLOC_FREE(parent_fname);
3761 TALLOC_FREE(new_base_name);
3765 NTSTATUS create_file_default(connection_struct *conn,
3766 struct smb_request *req,
3767 uint16_t root_dir_fid,
3768 struct smb_filename *smb_fname,
3769 uint32_t access_mask,
3770 uint32_t share_access,
3771 uint32_t create_disposition,
3772 uint32_t create_options,
3773 uint32_t file_attributes,
3774 uint32_t oplock_request,
3775 uint64_t allocation_size,
3776 uint32_t private_flags,
3777 struct security_descriptor *sd,
3778 struct ea_list *ea_list,
3779 files_struct **result,
3782 int info = FILE_WAS_OPENED;
3783 files_struct *fsp = NULL;
3785 bool stream_name = false;
3787 DEBUG(10,("create_file: access_mask = 0x%x "
3788 "file_attributes = 0x%x, share_access = 0x%x, "
3789 "create_disposition = 0x%x create_options = 0x%x "
3790 "oplock_request = 0x%x "
3791 "private_flags = 0x%x "
3792 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
3794 (unsigned int)access_mask,
3795 (unsigned int)file_attributes,
3796 (unsigned int)share_access,
3797 (unsigned int)create_disposition,
3798 (unsigned int)create_options,
3799 (unsigned int)oplock_request,
3800 (unsigned int)private_flags,
3801 (unsigned int)root_dir_fid,
3802 ea_list, sd, smb_fname_str_dbg(smb_fname)));
3805 * Calculate the filename from the root_dir_if if necessary.
3808 if (root_dir_fid != 0) {
3809 struct smb_filename *smb_fname_out = NULL;
3810 status = get_relative_fid_filename(conn, req, root_dir_fid,
3811 smb_fname, &smb_fname_out);
3812 if (!NT_STATUS_IS_OK(status)) {
3815 smb_fname = smb_fname_out;
3819 * Check to see if this is a mac fork of some kind.
3822 stream_name = is_ntfs_stream_smb_fname(smb_fname);
3824 enum FAKE_FILE_TYPE fake_file_type;
3826 fake_file_type = is_fake_file(smb_fname);
3828 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
3831 * Here we go! support for changing the disk quotas
3834 * We need to fake up to open this MAGIC QUOTA file
3835 * and return a valid FID.
3837 * w2k close this file directly after openening xp
3838 * also tries a QUERY_FILE_INFO on the file and then
3841 status = open_fake_file(req, conn, req->vuid,
3842 fake_file_type, smb_fname,
3844 if (!NT_STATUS_IS_OK(status)) {
3848 ZERO_STRUCT(smb_fname->st);
3852 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
3853 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
3858 if (stream_name && is_ntfs_default_stream_smb_fname(smb_fname)) {
3860 smb_fname->stream_name = NULL;
3861 /* We have to handle this error here. */
3862 if (create_options & FILE_DIRECTORY_FILE) {
3863 status = NT_STATUS_NOT_A_DIRECTORY;
3866 if (lp_posix_pathnames()) {
3867 ret = SMB_VFS_LSTAT(conn, smb_fname);
3869 ret = SMB_VFS_STAT(conn, smb_fname);
3872 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
3873 status = NT_STATUS_FILE_IS_A_DIRECTORY;
3878 status = create_file_unixpath(
3879 conn, req, smb_fname, access_mask, share_access,
3880 create_disposition, create_options, file_attributes,
3881 oplock_request, allocation_size, private_flags,
3885 if (!NT_STATUS_IS_OK(status)) {
3890 DEBUG(10, ("create_file: info=%d\n", info));
3893 if (pinfo != NULL) {
3896 return NT_STATUS_OK;
3899 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
3902 close_file(req, fsp, ERROR_CLOSE);