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"
31 #include "../librpc/gen_ndr/idmap.h"
32 #include "../librpc/gen_ndr/ioctl.h"
33 #include "passdb/lookup_sid.h"
37 #include "source3/lib/dbwrap/dbwrap_watch.h"
38 #include "locking/leases_db.h"
39 #include "librpc/gen_ndr/ndr_leases_db.h"
41 extern const struct generic_mapping file_generic_mapping;
43 struct deferred_open_record {
44 bool delayed_for_oplocks;
49 /****************************************************************************
50 If the requester wanted DELETE_ACCESS and was rejected because
51 the file ACL didn't include DELETE_ACCESS, see if the parent ACL
53 ****************************************************************************/
55 static bool parent_override_delete(connection_struct *conn,
56 const struct smb_filename *smb_fname,
58 uint32_t rejected_mask)
60 if ((access_mask & DELETE_ACCESS) &&
61 (rejected_mask & DELETE_ACCESS) &&
62 can_delete_file_in_directory(conn, smb_fname)) {
68 /****************************************************************************
69 Check if we have open rights.
70 ****************************************************************************/
72 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
73 const struct smb_filename *smb_fname,
77 /* Check if we have rights to open. */
79 struct security_descriptor *sd = NULL;
80 uint32_t rejected_share_access;
81 uint32_t rejected_mask = access_mask;
82 uint32_t do_not_check_mask = 0;
84 rejected_share_access = access_mask & ~(conn->share_access);
86 if (rejected_share_access) {
87 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
89 (unsigned int)access_mask,
90 smb_fname_str_dbg(smb_fname),
91 (unsigned int)rejected_share_access ));
92 return NT_STATUS_ACCESS_DENIED;
95 if (!use_privs && get_current_uid(conn) == (uid_t)0) {
96 /* I'm sorry sir, I didn't know you were root... */
97 DEBUG(10,("smbd_check_access_rights: root override "
98 "on %s. Granting 0x%x\n",
99 smb_fname_str_dbg(smb_fname),
100 (unsigned int)access_mask ));
104 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
105 DEBUG(10,("smbd_check_access_rights: not checking ACL "
106 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
107 smb_fname_str_dbg(smb_fname),
108 (unsigned int)access_mask ));
112 if (access_mask == DELETE_ACCESS &&
113 VALID_STAT(smb_fname->st) &&
114 S_ISLNK(smb_fname->st.st_ex_mode)) {
115 /* We can always delete a symlink. */
116 DEBUG(10,("smbd_check_access_rights: not checking ACL "
117 "on DELETE_ACCESS on symlink %s.\n",
118 smb_fname_str_dbg(smb_fname) ));
122 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
125 SECINFO_DACL), talloc_tos(), &sd);
127 if (!NT_STATUS_IS_OK(status)) {
128 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
130 smb_fname_str_dbg(smb_fname),
133 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
141 * If we can access the path to this file, by
142 * default we have FILE_READ_ATTRIBUTES from the
143 * containing directory. See the section:
144 * "Algorithm to Check Access to an Existing File"
147 * se_file_access_check() also takes care of
148 * owner WRITE_DAC and READ_CONTROL.
150 do_not_check_mask = FILE_READ_ATTRIBUTES;
153 * Samba 3.6 and earlier granted execute access even
154 * if the ACL did not contain execute rights.
155 * Samba 4.0 is more correct and checks it.
156 * The compatibilty mode allows to skip this check
157 * to smoothen upgrades.
159 if (lp_acl_allow_execute_always(SNUM(conn))) {
160 do_not_check_mask |= FILE_EXECUTE;
163 status = se_file_access_check(sd,
164 get_current_nttok(conn),
166 (access_mask & ~do_not_check_mask),
169 DEBUG(10,("smbd_check_access_rights: file %s requesting "
170 "0x%x returning 0x%x (%s)\n",
171 smb_fname_str_dbg(smb_fname),
172 (unsigned int)access_mask,
173 (unsigned int)rejected_mask,
174 nt_errstr(status) ));
176 if (!NT_STATUS_IS_OK(status)) {
177 if (DEBUGLEVEL >= 10) {
178 DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
179 smb_fname_str_dbg(smb_fname) ));
180 NDR_PRINT_DEBUG(security_descriptor, sd);
186 if (NT_STATUS_IS_OK(status) ||
187 !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
191 /* Here we know status == NT_STATUS_ACCESS_DENIED. */
195 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
196 (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
197 !lp_store_dos_attributes(SNUM(conn)) &&
198 (lp_map_readonly(SNUM(conn)) ||
199 lp_map_archive(SNUM(conn)) ||
200 lp_map_hidden(SNUM(conn)) ||
201 lp_map_system(SNUM(conn)))) {
202 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
204 DEBUG(10,("smbd_check_access_rights: "
206 "FILE_WRITE_ATTRIBUTES "
208 smb_fname_str_dbg(smb_fname)));
211 if (parent_override_delete(conn,
215 /* Were we trying to do an open
216 * for delete and didn't get DELETE
217 * access (only) ? Check if the
218 * directory allows DELETE_CHILD.
220 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
223 rejected_mask &= ~DELETE_ACCESS;
225 DEBUG(10,("smbd_check_access_rights: "
229 smb_fname_str_dbg(smb_fname)));
232 if (rejected_mask != 0) {
233 return NT_STATUS_ACCESS_DENIED;
238 static NTSTATUS check_parent_access(struct connection_struct *conn,
239 struct smb_filename *smb_fname,
240 uint32_t access_mask)
243 char *parent_dir = NULL;
244 struct security_descriptor *parent_sd = NULL;
245 uint32_t access_granted = 0;
247 if (!parent_dirname(talloc_tos(),
248 smb_fname->base_name,
251 return NT_STATUS_NO_MEMORY;
254 if (get_current_uid(conn) == (uid_t)0) {
255 /* I'm sorry sir, I didn't know you were root... */
256 DEBUG(10,("check_parent_access: root override "
257 "on %s. Granting 0x%x\n",
258 smb_fname_str_dbg(smb_fname),
259 (unsigned int)access_mask ));
263 status = SMB_VFS_GET_NT_ACL(conn,
269 if (!NT_STATUS_IS_OK(status)) {
270 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
271 "%s with error %s\n",
278 * If we can access the path to this file, by
279 * default we have FILE_READ_ATTRIBUTES from the
280 * containing directory. See the section:
281 * "Algorithm to Check Access to an Existing File"
284 * se_file_access_check() also takes care of
285 * owner WRITE_DAC and READ_CONTROL.
287 status = se_file_access_check(parent_sd,
288 get_current_nttok(conn),
290 (access_mask & ~FILE_READ_ATTRIBUTES),
292 if(!NT_STATUS_IS_OK(status)) {
293 DEBUG(5,("check_parent_access: access check "
294 "on directory %s for "
295 "path %s for mask 0x%x returned (0x%x) %s\n",
297 smb_fname->base_name,
300 nt_errstr(status) ));
307 /****************************************************************************
308 Ensure when opening a base file for a stream open that we have permissions
309 to do so given the access mask on the base file.
310 ****************************************************************************/
312 static NTSTATUS check_base_file_access(struct connection_struct *conn,
313 struct smb_filename *smb_fname,
314 uint32_t access_mask)
318 status = smbd_calculate_access_mask(conn, smb_fname,
322 if (!NT_STATUS_IS_OK(status)) {
323 DEBUG(10, ("smbd_calculate_access_mask "
324 "on file %s returned %s\n",
325 smb_fname_str_dbg(smb_fname),
330 if (access_mask & (FILE_WRITE_DATA|FILE_APPEND_DATA)) {
332 if (!CAN_WRITE(conn)) {
333 return NT_STATUS_ACCESS_DENIED;
335 dosattrs = dos_mode(conn, smb_fname);
336 if (IS_DOS_READONLY(dosattrs)) {
337 return NT_STATUS_ACCESS_DENIED;
341 return smbd_check_access_rights(conn,
347 /****************************************************************************
348 fd support routines - attempt to do a dos_open.
349 ****************************************************************************/
351 NTSTATUS fd_open(struct connection_struct *conn,
356 struct smb_filename *smb_fname = fsp->fsp_name;
357 NTSTATUS status = NT_STATUS_OK;
361 * Never follow symlinks on a POSIX client. The
362 * client should be doing this.
365 if (fsp->posix_open || !lp_follow_symlinks(SNUM(conn))) {
370 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
371 if (fsp->fh->fd == -1) {
372 int posix_errno = errno;
374 #if defined(ENOTSUP) && defined(OSF1)
375 /* handle special Tru64 errno */
376 if (errno == ENOTSUP) {
381 /* fix broken NetBSD errno */
382 if (errno == EFTYPE) {
386 /* fix broken FreeBSD errno */
387 if (errno == EMLINK) {
390 #endif /* O_NOFOLLOW */
391 status = map_nt_error_from_unix(posix_errno);
392 if (errno == EMFILE) {
393 static time_t last_warned = 0L;
395 if (time((time_t *) NULL) > last_warned) {
396 DEBUG(0,("Too many open files, unable "
397 "to open more! smbd's max "
399 lp_max_open_files()));
400 last_warned = time((time_t *) NULL);
406 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
407 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
408 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
413 /****************************************************************************
414 Close the file associated with a fsp.
415 ****************************************************************************/
417 NTSTATUS fd_close(files_struct *fsp)
424 if (fsp->fh->fd == -1) {
425 return NT_STATUS_OK; /* What we used to call a stat open. */
427 if (fsp->fh->ref_count > 1) {
428 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
431 ret = SMB_VFS_CLOSE(fsp);
434 return map_nt_error_from_unix(errno);
439 /****************************************************************************
440 Change the ownership of a file to that of the parent directory.
441 Do this by fd if possible.
442 ****************************************************************************/
444 void change_file_owner_to_parent(connection_struct *conn,
445 const char *inherit_from_dir,
448 struct smb_filename *smb_fname_parent;
451 smb_fname_parent = synthetic_smb_fname(talloc_tos(), inherit_from_dir,
453 if (smb_fname_parent == NULL) {
457 ret = SMB_VFS_STAT(conn, smb_fname_parent);
459 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
460 "directory %s. Error was %s\n",
461 smb_fname_str_dbg(smb_fname_parent),
463 TALLOC_FREE(smb_fname_parent);
467 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
468 /* Already this uid - no need to change. */
469 DEBUG(10,("change_file_owner_to_parent: file %s "
470 "is already owned by uid %d\n",
472 (int)fsp->fsp_name->st.st_ex_uid ));
473 TALLOC_FREE(smb_fname_parent);
478 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
481 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
482 "file %s to parent directory uid %u. Error "
483 "was %s\n", fsp_str_dbg(fsp),
484 (unsigned int)smb_fname_parent->st.st_ex_uid,
487 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
488 "parent directory uid %u.\n", fsp_str_dbg(fsp),
489 (unsigned int)smb_fname_parent->st.st_ex_uid));
490 /* Ensure the uid entry is updated. */
491 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
494 TALLOC_FREE(smb_fname_parent);
497 NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
498 const char *inherit_from_dir,
500 SMB_STRUCT_STAT *psbuf)
502 struct smb_filename *smb_fname_parent;
503 struct smb_filename *smb_fname_cwd = NULL;
504 char *saved_dir = NULL;
505 TALLOC_CTX *ctx = talloc_tos();
506 NTSTATUS status = NT_STATUS_OK;
509 smb_fname_parent = synthetic_smb_fname(ctx, inherit_from_dir,
511 if (smb_fname_parent == NULL) {
512 return NT_STATUS_NO_MEMORY;
515 ret = SMB_VFS_STAT(conn, smb_fname_parent);
517 status = map_nt_error_from_unix(errno);
518 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
519 "directory %s. Error was %s\n",
520 smb_fname_str_dbg(smb_fname_parent),
525 /* We've already done an lstat into psbuf, and we know it's a
526 directory. If we can cd into the directory and the dev/ino
527 are the same then we can safely chown without races as
528 we're locking the directory in place by being in it. This
529 should work on any UNIX (thanks tridge :-). JRA.
532 saved_dir = vfs_GetWd(ctx,conn);
534 status = map_nt_error_from_unix(errno);
535 DEBUG(0,("change_dir_owner_to_parent: failed to get "
536 "current working directory. Error was %s\n",
541 /* Chdir into the new path. */
542 if (vfs_ChDir(conn, fname) == -1) {
543 status = map_nt_error_from_unix(errno);
544 DEBUG(0,("change_dir_owner_to_parent: failed to change "
545 "current working directory to %s. Error "
546 "was %s\n", fname, strerror(errno) ));
550 smb_fname_cwd = synthetic_smb_fname(ctx, ".", NULL, NULL);
551 if (smb_fname_cwd == NULL) {
552 status = NT_STATUS_NO_MEMORY;
556 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
558 status = map_nt_error_from_unix(errno);
559 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
560 "directory '.' (%s) Error was %s\n",
561 fname, strerror(errno)));
565 /* Ensure we're pointing at the same place. */
566 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
567 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
568 DEBUG(0,("change_dir_owner_to_parent: "
569 "device/inode on directory %s changed. "
570 "Refusing to chown !\n", fname ));
571 status = NT_STATUS_ACCESS_DENIED;
575 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
576 /* Already this uid - no need to change. */
577 DEBUG(10,("change_dir_owner_to_parent: directory %s "
578 "is already owned by uid %d\n",
580 (int)smb_fname_cwd->st.st_ex_uid ));
581 status = NT_STATUS_OK;
586 ret = SMB_VFS_LCHOWN(conn, ".", smb_fname_parent->st.st_ex_uid,
590 status = map_nt_error_from_unix(errno);
591 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
592 "directory %s to parent directory uid %u. "
593 "Error was %s\n", fname,
594 (unsigned int)smb_fname_parent->st.st_ex_uid,
597 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
598 "directory %s to parent directory uid %u.\n",
599 fname, (unsigned int)smb_fname_parent->st.st_ex_uid ));
600 /* Ensure the uid entry is updated. */
601 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
605 vfs_ChDir(conn,saved_dir);
607 TALLOC_FREE(smb_fname_parent);
608 TALLOC_FREE(smb_fname_cwd);
612 /****************************************************************************
613 Open a file - returning a guaranteed ATOMIC indication of if the
614 file was created or not.
615 ****************************************************************************/
617 static NTSTATUS fd_open_atomic(struct connection_struct *conn,
623 NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
624 bool file_existed = VALID_STAT(fsp->fsp_name->st);
626 *file_created = false;
628 if (!(flags & O_CREAT)) {
630 * We're not creating the file, just pass through.
632 return fd_open(conn, fsp, flags, mode);
635 if (flags & O_EXCL) {
637 * Fail if already exists, just pass through.
639 status = fd_open(conn, fsp, flags, mode);
642 * Here we've opened with O_CREAT|O_EXCL. If that went
643 * NT_STATUS_OK, we *know* we created this file.
645 *file_created = NT_STATUS_IS_OK(status);
651 * Now it gets tricky. We have O_CREAT, but not O_EXCL.
652 * To know absolutely if we created the file or not,
653 * we can never call O_CREAT without O_EXCL. So if
654 * we think the file existed, try without O_CREAT|O_EXCL.
655 * If we think the file didn't exist, try with
656 * O_CREAT|O_EXCL. Keep bouncing between these two
657 * requests until either the file is created, or
658 * opened. Either way, we keep going until we get
659 * a returnable result (error, or open/create).
663 int curr_flags = flags;
666 /* Just try open, do not create. */
667 curr_flags &= ~(O_CREAT);
668 status = fd_open(conn, fsp, curr_flags, mode);
669 if (NT_STATUS_EQUAL(status,
670 NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
672 * Someone deleted it in the meantime.
675 file_existed = false;
676 DEBUG(10,("fd_open_atomic: file %s existed. "
678 smb_fname_str_dbg(fsp->fsp_name)));
682 /* Try create exclusively, fail if it exists. */
683 curr_flags |= O_EXCL;
684 status = fd_open(conn, fsp, curr_flags, mode);
685 if (NT_STATUS_EQUAL(status,
686 NT_STATUS_OBJECT_NAME_COLLISION)) {
688 * Someone created it in the meantime.
689 * Retry without O_CREAT.
692 DEBUG(10,("fd_open_atomic: file %s "
693 "did not exist. Retry.\n",
694 smb_fname_str_dbg(fsp->fsp_name)));
697 if (NT_STATUS_IS_OK(status)) {
699 * Here we've opened with O_CREAT|O_EXCL
700 * and got success. We *know* we created
703 *file_created = true;
706 /* Create is done, or failed. */
712 /****************************************************************************
714 ****************************************************************************/
716 static NTSTATUS open_file(files_struct *fsp,
717 connection_struct *conn,
718 struct smb_request *req,
719 const char *parent_dir,
722 uint32_t access_mask, /* client requested access mask. */
723 uint32_t open_access_mask, /* what we're actually using in the open. */
724 bool *p_file_created)
726 struct smb_filename *smb_fname = fsp->fsp_name;
727 NTSTATUS status = NT_STATUS_OK;
728 int accmode = (flags & O_ACCMODE);
729 int local_flags = flags;
730 bool file_existed = VALID_STAT(fsp->fsp_name->st);
735 /* Check permissions */
738 * This code was changed after seeing a client open request
739 * containing the open mode of (DENY_WRITE/read-only) with
740 * the 'create if not exist' bit set. The previous code
741 * would fail to open the file read only on a read-only share
742 * as it was checking the flags parameter directly against O_RDONLY,
743 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
747 if (!CAN_WRITE(conn)) {
748 /* It's a read-only share - fail if we wanted to write. */
749 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
750 DEBUG(3,("Permission denied opening %s\n",
751 smb_fname_str_dbg(smb_fname)));
752 return NT_STATUS_ACCESS_DENIED;
754 if (flags & O_CREAT) {
755 /* We don't want to write - but we must make sure that
756 O_CREAT doesn't create the file if we have write
757 access into the directory.
759 flags &= ~(O_CREAT|O_EXCL);
760 local_flags &= ~(O_CREAT|O_EXCL);
765 * This little piece of insanity is inspired by the
766 * fact that an NT client can open a file for O_RDONLY,
767 * but set the create disposition to FILE_EXISTS_TRUNCATE.
768 * If the client *can* write to the file, then it expects to
769 * truncate the file, even though it is opening for readonly.
770 * Quicken uses this stupid trick in backup file creation...
771 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
772 * for helping track this one down. It didn't bite us in 2.0.x
773 * as we always opened files read-write in that release. JRA.
776 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
777 DEBUG(10,("open_file: truncate requested on read-only open "
778 "for file %s\n", smb_fname_str_dbg(smb_fname)));
779 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
782 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
783 (!file_existed && (local_flags & O_CREAT)) ||
784 ((local_flags & O_TRUNC) == O_TRUNC) ) {
788 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
790 * We would block on opening a FIFO with no one else on the
791 * other end. Do what we used to do and add O_NONBLOCK to the
795 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
796 local_flags &= ~O_TRUNC; /* Can't truncate a FIFO. */
797 local_flags |= O_NONBLOCK;
801 /* Don't create files with Microsoft wildcard characters. */
804 * wildcard characters are allowed in stream names
805 * only test the basefilename
807 wild = fsp->base_fsp->fsp_name->base_name;
809 wild = smb_fname->base_name;
811 if ((local_flags & O_CREAT) && !file_existed &&
813 return NT_STATUS_OBJECT_NAME_INVALID;
816 /* Can we access this file ? */
817 if (!fsp->base_fsp) {
818 /* Only do this check on non-stream open. */
820 status = smbd_check_access_rights(conn,
825 if (!NT_STATUS_IS_OK(status)) {
826 DEBUG(10, ("open_file: "
827 "smbd_check_access_rights "
828 "on file %s returned %s\n",
829 smb_fname_str_dbg(smb_fname),
833 if (!NT_STATUS_IS_OK(status) &&
834 !NT_STATUS_EQUAL(status,
835 NT_STATUS_OBJECT_NAME_NOT_FOUND))
840 if (NT_STATUS_EQUAL(status,
841 NT_STATUS_OBJECT_NAME_NOT_FOUND))
843 DEBUG(10, ("open_file: "
844 "file %s vanished since we "
845 "checked for existence.\n",
846 smb_fname_str_dbg(smb_fname)));
847 file_existed = false;
848 SET_STAT_INVALID(fsp->fsp_name->st);
853 if (!(local_flags & O_CREAT)) {
854 /* File didn't exist and no O_CREAT. */
855 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
858 status = check_parent_access(conn,
861 if (!NT_STATUS_IS_OK(status)) {
862 DEBUG(10, ("open_file: "
863 "check_parent_access on "
864 "file %s returned %s\n",
865 smb_fname_str_dbg(smb_fname),
866 nt_errstr(status) ));
873 * Actually do the open - if O_TRUNC is needed handle it
874 * below under the share mode lock.
876 status = fd_open_atomic(conn, fsp, local_flags & ~O_TRUNC,
877 unx_mode, p_file_created);
878 if (!NT_STATUS_IS_OK(status)) {
879 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
880 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
881 nt_errstr(status),local_flags,flags));
885 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
887 /* If we have an fd, this stat should succeed. */
888 DEBUG(0,("Error doing fstat on open file %s "
890 smb_fname_str_dbg(smb_fname),
892 status = map_nt_error_from_unix(errno);
897 if (*p_file_created) {
898 /* We created this file. */
900 bool need_re_stat = false;
901 /* Do all inheritance work after we've
902 done a successful fstat call and filled
903 in the stat struct in fsp->fsp_name. */
905 /* Inherit the ACL if required */
906 if (lp_inherit_permissions(SNUM(conn))) {
907 inherit_access_posix_acl(conn, parent_dir,
908 smb_fname->base_name,
913 /* Change the owner if required. */
914 if (lp_inherit_owner(SNUM(conn))) {
915 change_file_owner_to_parent(conn, parent_dir,
921 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
922 /* If we have an fd, this stat should succeed. */
924 DEBUG(0,("Error doing fstat on open file %s "
926 smb_fname_str_dbg(smb_fname),
931 notify_fname(conn, NOTIFY_ACTION_ADDED,
932 FILE_NOTIFY_CHANGE_FILE_NAME,
933 smb_fname->base_name);
936 fsp->fh->fd = -1; /* What we used to call a stat open. */
938 /* File must exist for a stat open. */
939 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
942 status = smbd_check_access_rights(conn,
947 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
949 S_ISLNK(smb_fname->st.st_ex_mode)) {
950 /* This is a POSIX stat open for delete
951 * or rename on a symlink that points
953 DEBUG(10,("open_file: allowing POSIX "
954 "open on bad symlink %s\n",
955 smb_fname_str_dbg(smb_fname)));
956 status = NT_STATUS_OK;
959 if (!NT_STATUS_IS_OK(status)) {
960 DEBUG(10,("open_file: "
961 "smbd_check_access_rights on file "
963 smb_fname_str_dbg(smb_fname),
964 nt_errstr(status) ));
970 * POSIX allows read-only opens of directories. We don't
971 * want to do this (we use a different code path for this)
972 * so catch a directory open and return an EISDIR. JRA.
975 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
978 return NT_STATUS_FILE_IS_A_DIRECTORY;
981 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
982 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
983 fsp->file_pid = req ? req->smbpid : 0;
984 fsp->can_lock = True;
985 fsp->can_read = ((access_mask & FILE_READ_DATA) != 0);
988 ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0);
989 fsp->print_file = NULL;
990 fsp->modified = False;
991 fsp->sent_oplock_break = NO_BREAK_SENT;
992 fsp->is_directory = False;
993 if (conn->aio_write_behind_list &&
994 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
995 conn->case_sensitive)) {
996 fsp->aio_write_behind = True;
999 fsp->wcp = NULL; /* Write cache pointer. */
1001 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
1002 conn->session_info->unix_info->unix_name,
1003 smb_fname_str_dbg(smb_fname),
1004 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
1005 conn->num_files_open));
1008 return NT_STATUS_OK;
1011 /****************************************************************************
1012 Check if we can open a file with a share mode.
1013 Returns True if conflict, False if not.
1014 ****************************************************************************/
1016 static bool share_conflict(struct share_mode_entry *entry,
1017 uint32_t access_mask,
1018 uint32_t share_access)
1020 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
1021 "entry->share_access = 0x%x, "
1022 "entry->private_options = 0x%x\n",
1023 (unsigned int)entry->access_mask,
1024 (unsigned int)entry->share_access,
1025 (unsigned int)entry->private_options));
1027 if (server_id_is_disconnected(&entry->pid)) {
1029 * note: cleanup should have been done by
1030 * delay_for_batch_oplocks()
1035 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
1036 (unsigned int)access_mask, (unsigned int)share_access));
1038 if ((entry->access_mask & (FILE_WRITE_DATA|
1042 DELETE_ACCESS)) == 0) {
1043 DEBUG(10,("share_conflict: No conflict due to "
1044 "entry->access_mask = 0x%x\n",
1045 (unsigned int)entry->access_mask ));
1049 if ((access_mask & (FILE_WRITE_DATA|
1053 DELETE_ACCESS)) == 0) {
1054 DEBUG(10,("share_conflict: No conflict due to "
1055 "access_mask = 0x%x\n",
1056 (unsigned int)access_mask ));
1060 #if 1 /* JRA TEST - Superdebug. */
1061 #define CHECK_MASK(num, am, right, sa, share) \
1062 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
1063 (unsigned int)(num), (unsigned int)(am), \
1064 (unsigned int)(right), (unsigned int)(am)&(right) )); \
1065 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
1066 (unsigned int)(num), (unsigned int)(sa), \
1067 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
1068 if (((am) & (right)) && !((sa) & (share))) { \
1069 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
1070 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
1071 (unsigned int)(share) )); \
1075 #define CHECK_MASK(num, am, right, sa, share) \
1076 if (((am) & (right)) && !((sa) & (share))) { \
1077 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
1078 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
1079 (unsigned int)(share) )); \
1084 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
1085 share_access, FILE_SHARE_WRITE);
1086 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
1087 entry->share_access, FILE_SHARE_WRITE);
1089 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
1090 share_access, FILE_SHARE_READ);
1091 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
1092 entry->share_access, FILE_SHARE_READ);
1094 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
1095 share_access, FILE_SHARE_DELETE);
1096 CHECK_MASK(6, access_mask, DELETE_ACCESS,
1097 entry->share_access, FILE_SHARE_DELETE);
1099 DEBUG(10,("share_conflict: No conflict.\n"));
1103 #if defined(DEVELOPER)
1104 static void validate_my_share_entries(struct smbd_server_connection *sconn,
1106 struct share_mode_entry *share_entry)
1108 struct server_id self = messaging_server_id(sconn->msg_ctx);
1111 if (!serverid_equal(&self, &share_entry->pid)) {
1115 if (share_entry->op_mid == 0) {
1116 /* INTERNAL_OPEN_ONLY */
1120 if (!is_valid_share_mode_entry(share_entry)) {
1124 fsp = file_find_dif(sconn, share_entry->id,
1125 share_entry->share_file_id);
1127 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1128 share_mode_str(talloc_tos(), num, share_entry) ));
1129 smb_panic("validate_my_share_entries: Cannot match a "
1130 "share entry with an open file\n");
1133 if (((uint16_t)fsp->oplock_type) != share_entry->op_type) {
1142 DEBUG(0,("validate_my_share_entries: PANIC : %s\n",
1143 share_mode_str(talloc_tos(), num, share_entry) ));
1144 str = talloc_asprintf(talloc_tos(),
1145 "validate_my_share_entries: "
1146 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
1147 fsp->fsp_name->base_name,
1148 (unsigned int)fsp->oplock_type,
1149 (unsigned int)share_entry->op_type );
1155 bool is_stat_open(uint32_t access_mask)
1157 const uint32_t stat_open_bits =
1158 (SYNCHRONIZE_ACCESS|
1159 FILE_READ_ATTRIBUTES|
1160 FILE_WRITE_ATTRIBUTES);
1162 return (((access_mask & stat_open_bits) != 0) &&
1163 ((access_mask & ~stat_open_bits) == 0));
1166 static bool has_delete_on_close(struct share_mode_lock *lck,
1169 struct share_mode_data *d = lck->data;
1172 if (d->num_share_modes == 0) {
1175 if (!is_delete_on_close_set(lck, name_hash)) {
1178 for (i=0; i<d->num_share_modes; i++) {
1179 if (!share_mode_stale_pid(d, i)) {
1186 /****************************************************************************
1187 Deal with share modes
1188 Invariant: Share mode must be locked on entry and exit.
1189 Returns -1 on error, or number of share modes on success (may be zero).
1190 ****************************************************************************/
1192 static NTSTATUS open_mode_check(connection_struct *conn,
1193 struct share_mode_lock *lck,
1194 uint32_t access_mask,
1195 uint32_t share_access)
1199 if(lck->data->num_share_modes == 0) {
1200 return NT_STATUS_OK;
1203 if (is_stat_open(access_mask)) {
1204 /* Stat open that doesn't trigger oplock breaks or share mode
1205 * checks... ! JRA. */
1206 return NT_STATUS_OK;
1210 * Check if the share modes will give us access.
1213 #if defined(DEVELOPER)
1214 for(i = 0; i < lck->data->num_share_modes; i++) {
1215 validate_my_share_entries(conn->sconn, i,
1216 &lck->data->share_modes[i]);
1220 /* Now we check the share modes, after any oplock breaks. */
1221 for(i = 0; i < lck->data->num_share_modes; i++) {
1223 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1227 /* someone else has a share lock on it, check to see if we can
1229 if (share_conflict(&lck->data->share_modes[i],
1230 access_mask, share_access)) {
1232 if (share_mode_stale_pid(lck->data, i)) {
1236 return NT_STATUS_SHARING_VIOLATION;
1240 return NT_STATUS_OK;
1244 * Send a break message to the oplock holder and delay the open for
1248 NTSTATUS send_break_message(struct messaging_context *msg_ctx,
1249 const struct share_mode_entry *exclusive,
1253 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1254 struct server_id_buf tmp;
1256 DEBUG(10, ("Sending break request to PID %s\n",
1257 server_id_str_buf(exclusive->pid, &tmp)));
1259 /* Create the message. */
1260 share_mode_entry_to_message(msg, exclusive);
1262 /* Overload entry->op_type */
1264 * This is a cut from uint32_t to uint16_t, but so far only the lower 3
1265 * bits (LEASE_WRITE/HANDLE/READ are used anyway.
1267 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET, break_to);
1269 status = messaging_send_buf(msg_ctx, exclusive->pid,
1270 MSG_SMB_BREAK_REQUEST,
1271 (uint8_t *)msg, sizeof(msg));
1272 if (!NT_STATUS_IS_OK(status)) {
1273 DEBUG(3, ("Could not send oplock break message: %s\n",
1274 nt_errstr(status)));
1281 * Do internal consistency checks on the share mode for a file.
1284 static bool validate_oplock_types(struct share_mode_lock *lck)
1286 struct share_mode_data *d = lck->data;
1288 bool ex_or_batch = false;
1289 bool level2 = false;
1290 bool no_oplock = false;
1291 uint32_t num_non_stat_opens = 0;
1294 for (i=0; i<d->num_share_modes; i++) {
1295 struct share_mode_entry *e = &d->share_modes[i];
1297 if (!is_valid_share_mode_entry(e)) {
1301 if (e->op_mid == 0) {
1302 /* INTERNAL_OPEN_ONLY */
1306 if (e->op_type == NO_OPLOCK && is_stat_open(e->access_mask)) {
1307 /* We ignore stat opens in the table - they
1308 always have NO_OPLOCK and never get or
1309 cause breaks. JRA. */
1313 num_non_stat_opens += 1;
1315 if (BATCH_OPLOCK_TYPE(e->op_type)) {
1316 /* batch - can only be one. */
1317 if (share_mode_stale_pid(d, i)) {
1318 DEBUG(10, ("Found stale batch oplock\n"));
1321 if (ex_or_batch || batch || level2 || no_oplock) {
1322 DEBUG(0, ("Bad batch oplock entry %u.",
1329 if (EXCLUSIVE_OPLOCK_TYPE(e->op_type)) {
1330 if (share_mode_stale_pid(d, i)) {
1331 DEBUG(10, ("Found stale duplicate oplock\n"));
1334 /* Exclusive or batch - can only be one. */
1335 if (ex_or_batch || level2 || no_oplock) {
1336 DEBUG(0, ("Bad exclusive or batch oplock "
1337 "entry %u.", (unsigned)i));
1343 if (LEVEL_II_OPLOCK_TYPE(e->op_type)) {
1344 if (batch || ex_or_batch) {
1345 if (share_mode_stale_pid(d, i)) {
1346 DEBUG(10, ("Found stale LevelII "
1350 DEBUG(0, ("Bad levelII oplock entry %u.",
1357 if (e->op_type == NO_OPLOCK) {
1358 if (batch || ex_or_batch) {
1359 if (share_mode_stale_pid(d, i)) {
1360 DEBUG(10, ("Found stale NO_OPLOCK "
1364 DEBUG(0, ("Bad no oplock entry %u.",
1372 remove_stale_share_mode_entries(d);
1374 if ((batch || ex_or_batch) && (num_non_stat_opens != 1)) {
1375 DEBUG(1, ("got batch (%d) or ex (%d) non-exclusively (%d)\n",
1376 (int)batch, (int)ex_or_batch,
1377 (int)d->num_share_modes));
1384 static bool delay_for_oplock(files_struct *fsp,
1386 const struct smb2_lease *lease,
1387 struct share_mode_lock *lck,
1388 bool have_sharing_violation,
1389 uint32_t create_disposition,
1390 bool first_open_attempt)
1392 struct share_mode_data *d = lck->data;
1395 bool will_overwrite;
1397 if ((oplock_request & INTERNAL_OPEN_ONLY) ||
1398 is_stat_open(fsp->access_mask)) {
1402 switch (create_disposition) {
1403 case FILE_SUPERSEDE:
1404 case FILE_OVERWRITE:
1405 case FILE_OVERWRITE_IF:
1406 will_overwrite = true;
1409 will_overwrite = false;
1413 for (i=0; i<d->num_share_modes; i++) {
1414 struct share_mode_entry *e = &d->share_modes[i];
1415 struct share_mode_lease *l = NULL;
1416 uint32_t e_lease_type = get_lease_type(d, e);
1418 uint32_t delay_mask = 0;
1420 if (e->op_type == LEASE_OPLOCK) {
1421 l = &d->leases[e->lease_idx];
1424 if (have_sharing_violation) {
1425 delay_mask = SMB2_LEASE_HANDLE;
1427 delay_mask = SMB2_LEASE_WRITE;
1430 break_to = e_lease_type & ~delay_mask;
1432 if (will_overwrite) {
1434 * we'll decide about SMB2_LEASE_READ later.
1436 * Maybe the break will be defered
1438 break_to &= ~SMB2_LEASE_HANDLE;
1441 DEBUG(10, ("entry %u: e_lease_type %u, will_overwrite: %u\n",
1442 (unsigned)i, (unsigned)e_lease_type,
1443 (unsigned)will_overwrite));
1445 if (lease != NULL && l != NULL) {
1448 ign = smb2_lease_equal(fsp_client_guid(fsp),
1457 if ((e_lease_type & ~break_to) == 0) {
1458 if (l != NULL && l->breaking) {
1464 if (share_mode_stale_pid(d, i)) {
1468 if (will_overwrite) {
1470 * If we break anyway break to NONE directly.
1471 * Otherwise vfs_set_filelen() will trigger the
1474 break_to &= ~(SMB2_LEASE_READ|SMB2_LEASE_WRITE);
1477 if (e->op_type != LEASE_OPLOCK) {
1479 * Oplocks only support breaking to R or NONE.
1481 break_to &= ~(SMB2_LEASE_HANDLE|SMB2_LEASE_WRITE);
1484 DEBUG(10, ("breaking from %d to %d\n",
1485 (int)e_lease_type, (int)break_to));
1486 send_break_message(fsp->conn->sconn->msg_ctx, e,
1488 if (e_lease_type & delay_mask) {
1491 if (l != NULL && l->breaking && !first_open_attempt) {
1500 static bool file_has_brlocks(files_struct *fsp)
1502 struct byte_range_lock *br_lck;
1504 br_lck = brl_get_locks_readonly(fsp);
1508 return (brl_num_locks(br_lck) > 0);
1511 int find_share_mode_lease(struct share_mode_data *d,
1512 const struct GUID *client_guid,
1513 const struct smb2_lease_key *key)
1517 for (i=0; i<d->num_leases; i++) {
1518 struct share_mode_lease *l = &d->leases[i];
1520 if (smb2_lease_equal(client_guid,
1531 struct fsp_lease *find_fsp_lease(struct files_struct *new_fsp,
1532 const struct smb2_lease_key *key,
1533 const struct share_mode_lease *l)
1535 struct files_struct *fsp;
1538 * TODO: Measure how expensive this loop is with thousands of open
1542 for (fsp = file_find_di_first(new_fsp->conn->sconn, new_fsp->file_id);
1544 fsp = file_find_di_next(fsp)) {
1546 if (fsp == new_fsp) {
1549 if (fsp->oplock_type != LEASE_OPLOCK) {
1552 if (smb2_lease_key_equal(&fsp->lease->lease.lease_key, key)) {
1553 fsp->lease->ref_count += 1;
1558 /* Not found - must be leased in another smbd. */
1559 new_fsp->lease = talloc_zero(new_fsp->conn->sconn, struct fsp_lease);
1560 if (new_fsp->lease == NULL) {
1563 new_fsp->lease->ref_count = 1;
1564 new_fsp->lease->sconn = new_fsp->conn->sconn;
1565 new_fsp->lease->lease.lease_key = *key;
1566 new_fsp->lease->lease.lease_state = l->current_state;
1568 * We internally treat all leases as V2 and update
1569 * the epoch, but when sending breaks it matters if
1570 * the requesting lease was v1 or v2.
1572 new_fsp->lease->lease.lease_version = l->lease_version;
1573 new_fsp->lease->lease.lease_epoch = l->epoch;
1574 return new_fsp->lease;
1577 static NTSTATUS grant_fsp_lease(struct files_struct *fsp,
1578 struct share_mode_lock *lck,
1579 const struct smb2_lease *lease,
1580 uint32_t *p_lease_idx,
1583 struct share_mode_data *d = lck->data;
1584 const struct GUID *client_guid = fsp_client_guid(fsp);
1585 struct share_mode_lease *tmp;
1589 idx = find_share_mode_lease(d, client_guid, &lease->lease_key);
1592 struct share_mode_lease *l = &d->leases[idx];
1594 uint32_t existing, requested;
1596 fsp->lease = find_fsp_lease(fsp, &lease->lease_key, l);
1597 if (fsp->lease == NULL) {
1598 DEBUG(1, ("Did not find existing lease for file %s\n",
1600 return NT_STATUS_NO_MEMORY;
1606 * Upgrade only if the requested lease is a strict upgrade.
1608 existing = l->current_state;
1609 requested = lease->lease_state;
1612 * Tricky: This test makes sure that "requested" is a
1613 * strict bitwise superset of "existing".
1615 do_upgrade = ((existing & requested) == existing);
1618 * Upgrade only if there's a change.
1620 do_upgrade &= (granted != existing);
1623 * Upgrade only if other leases don't prevent what was asked
1626 do_upgrade &= (granted == requested);
1629 * only upgrade if we are not in breaking state
1631 do_upgrade &= !l->breaking;
1633 DEBUG(10, ("existing=%"PRIu32", requested=%"PRIu32", "
1634 "granted=%"PRIu32", do_upgrade=%d\n",
1635 existing, requested, granted, (int)do_upgrade));
1638 l->current_state = granted;
1642 /* Ensure we're in sync with current lease state. */
1643 fsp_lease_update(lck, fsp_client_guid(fsp), fsp->lease);
1644 return NT_STATUS_OK;
1651 tmp = talloc_realloc(d, d->leases, struct share_mode_lease,
1657 return NT_STATUS_INSUFFICIENT_RESOURCES;
1661 fsp->lease = talloc_zero(fsp->conn->sconn, struct fsp_lease);
1662 if (fsp->lease == NULL) {
1663 return NT_STATUS_INSUFFICIENT_RESOURCES;
1665 fsp->lease->ref_count = 1;
1666 fsp->lease->sconn = fsp->conn->sconn;
1667 fsp->lease->lease.lease_version = lease->lease_version;
1668 fsp->lease->lease.lease_key = lease->lease_key;
1669 fsp->lease->lease.lease_state = granted;
1670 fsp->lease->lease.lease_epoch = lease->lease_epoch + 1;
1672 *p_lease_idx = d->num_leases;
1674 d->leases[d->num_leases] = (struct share_mode_lease) {
1675 .client_guid = *client_guid,
1676 .lease_key = fsp->lease->lease.lease_key,
1677 .current_state = fsp->lease->lease.lease_state,
1678 .lease_version = fsp->lease->lease.lease_version,
1679 .epoch = fsp->lease->lease.lease_epoch,
1682 status = leases_db_add(client_guid,
1685 fsp->conn->connectpath,
1686 fsp->fsp_name->base_name,
1687 fsp->fsp_name->stream_name);
1688 if (!NT_STATUS_IS_OK(status)) {
1689 DEBUG(10, ("%s: leases_db_add failed: %s\n", __func__,
1690 nt_errstr(status)));
1691 TALLOC_FREE(fsp->lease);
1692 return NT_STATUS_INSUFFICIENT_RESOURCES;
1698 return NT_STATUS_OK;
1701 static bool is_same_lease(const files_struct *fsp,
1702 const struct share_mode_data *d,
1703 const struct share_mode_entry *e,
1704 const struct smb2_lease *lease)
1706 if (e->op_type != LEASE_OPLOCK) {
1709 if (lease == NULL) {
1713 return smb2_lease_equal(fsp_client_guid(fsp),
1715 &d->leases[e->lease_idx].client_guid,
1716 &d->leases[e->lease_idx].lease_key);
1719 static NTSTATUS grant_fsp_oplock_type(struct smb_request *req,
1720 struct files_struct *fsp,
1721 struct share_mode_lock *lck,
1723 struct smb2_lease *lease)
1725 struct share_mode_data *d = lck->data;
1726 bool got_handle_lease = false;
1727 bool got_oplock = false;
1730 uint32_t lease_idx = UINT32_MAX;
1734 if (oplock_request & INTERNAL_OPEN_ONLY) {
1735 /* No oplocks on internal open. */
1736 oplock_request = NO_OPLOCK;
1737 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1738 fsp->oplock_type, fsp_str_dbg(fsp)));
1741 if (oplock_request == LEASE_OPLOCK) {
1742 if (lease == NULL) {
1744 * The SMB2 layer should have checked this
1746 return NT_STATUS_INTERNAL_ERROR;
1749 granted = lease->lease_state;
1751 if (lp_kernel_oplocks(SNUM(fsp->conn))) {
1752 DEBUG(10, ("No lease granted because kernel oplocks are enabled\n"));
1753 granted = SMB2_LEASE_NONE;
1755 if ((granted & (SMB2_LEASE_READ|SMB2_LEASE_WRITE)) == 0) {
1756 DEBUG(10, ("No read or write lease requested\n"));
1757 granted = SMB2_LEASE_NONE;
1759 if (granted == SMB2_LEASE_WRITE) {
1760 DEBUG(10, ("pure write lease requested\n"));
1761 granted = SMB2_LEASE_NONE;
1763 if (granted == (SMB2_LEASE_WRITE|SMB2_LEASE_HANDLE)) {
1764 DEBUG(10, ("write and handle lease requested\n"));
1765 granted = SMB2_LEASE_NONE;
1768 granted = map_oplock_to_lease_type(
1769 oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
1772 if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
1773 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
1775 granted &= ~SMB2_LEASE_READ;
1778 for (i=0; i<d->num_share_modes; i++) {
1779 struct share_mode_entry *e = &d->share_modes[i];
1780 uint32_t e_lease_type;
1782 e_lease_type = get_lease_type(d, e);
1784 if ((granted & SMB2_LEASE_WRITE) &&
1785 !is_same_lease(fsp, d, e, lease) &&
1786 !share_mode_stale_pid(d, i)) {
1788 * Can grant only one writer
1790 granted &= ~SMB2_LEASE_WRITE;
1793 if ((e_lease_type & SMB2_LEASE_HANDLE) && !got_handle_lease &&
1794 !share_mode_stale_pid(d, i)) {
1795 got_handle_lease = true;
1798 if ((e->op_type != LEASE_OPLOCK) && !got_oplock &&
1799 !share_mode_stale_pid(d, i)) {
1804 if ((granted & SMB2_LEASE_READ) && !(granted & SMB2_LEASE_WRITE)) {
1806 (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
1807 lp_level2_oplocks(SNUM(fsp->conn));
1809 if (!allow_level2) {
1810 granted = SMB2_LEASE_NONE;
1814 if (oplock_request == LEASE_OPLOCK) {
1816 granted &= ~SMB2_LEASE_HANDLE;
1819 fsp->oplock_type = LEASE_OPLOCK;
1821 status = grant_fsp_lease(fsp, lck, lease, &lease_idx,
1823 if (!NT_STATUS_IS_OK(status)) {
1827 *lease = fsp->lease->lease;
1828 DEBUG(10, ("lease_state=%d\n", lease->lease_state));
1830 if (got_handle_lease) {
1831 granted = SMB2_LEASE_NONE;
1835 case SMB2_LEASE_READ|SMB2_LEASE_WRITE|SMB2_LEASE_HANDLE:
1836 fsp->oplock_type = BATCH_OPLOCK|EXCLUSIVE_OPLOCK;
1838 case SMB2_LEASE_READ|SMB2_LEASE_WRITE:
1839 fsp->oplock_type = EXCLUSIVE_OPLOCK;
1841 case SMB2_LEASE_READ|SMB2_LEASE_HANDLE:
1842 case SMB2_LEASE_READ:
1843 fsp->oplock_type = LEVEL_II_OPLOCK;
1846 fsp->oplock_type = NO_OPLOCK;
1850 status = set_file_oplock(fsp);
1851 if (!NT_STATUS_IS_OK(status)) {
1853 * Could not get the kernel oplock
1855 fsp->oplock_type = NO_OPLOCK;
1859 ok = set_share_mode(lck, fsp, get_current_uid(fsp->conn),
1864 return NT_STATUS_NO_MEMORY;
1867 ok = update_num_read_oplocks(fsp, lck);
1869 del_share_mode(lck, fsp);
1870 return NT_STATUS_INTERNAL_ERROR;
1873 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
1874 fsp->oplock_type, fsp_str_dbg(fsp)));
1876 return NT_STATUS_OK;
1879 static bool request_timed_out(struct timeval request_time,
1880 struct timeval timeout)
1882 struct timeval now, end_time;
1884 end_time = timeval_sum(&request_time, &timeout);
1885 return (timeval_compare(&end_time, &now) < 0);
1888 struct defer_open_state {
1889 struct smbXsrv_connection *xconn;
1893 static void defer_open_done(struct tevent_req *req);
1895 /****************************************************************************
1896 Handle the 1 second delay in returning a SHARING_VIOLATION error.
1897 ****************************************************************************/
1899 static void defer_open(struct share_mode_lock *lck,
1900 struct timeval request_time,
1901 struct timeval timeout,
1902 struct smb_request *req,
1903 struct deferred_open_record *state)
1905 struct deferred_open_record *open_rec;
1907 DEBUG(10,("defer_open_sharing_error: time [%u.%06u] adding deferred "
1908 "open entry for mid %llu\n",
1909 (unsigned int)request_time.tv_sec,
1910 (unsigned int)request_time.tv_usec,
1911 (unsigned long long)req->mid));
1913 open_rec = talloc(NULL, struct deferred_open_record);
1914 if (open_rec == NULL) {
1916 exit_server("talloc failed");
1922 struct defer_open_state *watch_state;
1923 struct tevent_req *watch_req;
1926 watch_state = talloc(open_rec, struct defer_open_state);
1927 if (watch_state == NULL) {
1928 exit_server("talloc failed");
1930 watch_state->xconn = req->xconn;
1931 watch_state->mid = req->mid;
1933 DEBUG(10, ("defering mid %llu\n",
1934 (unsigned long long)req->mid));
1936 watch_req = dbwrap_record_watch_send(
1937 watch_state, req->sconn->ev_ctx, lck->data->record,
1938 req->sconn->msg_ctx);
1939 if (watch_req == NULL) {
1940 exit_server("Could not watch share mode record");
1942 tevent_req_set_callback(watch_req, defer_open_done,
1945 ret = tevent_req_set_endtime(
1946 watch_req, req->sconn->ev_ctx,
1947 timeval_sum(&request_time, &timeout));
1951 if (!push_deferred_open_message_smb(req, request_time, timeout,
1952 state->id, open_rec)) {
1954 exit_server("push_deferred_open_message_smb failed");
1958 static void defer_open_done(struct tevent_req *req)
1960 struct defer_open_state *state = tevent_req_callback_data(
1961 req, struct defer_open_state);
1965 status = dbwrap_record_watch_recv(req, talloc_tos(), NULL);
1967 if (!NT_STATUS_IS_OK(status)) {
1968 DEBUG(5, ("dbwrap_record_watch_recv returned %s\n",
1969 nt_errstr(status)));
1971 * Even if it failed, retry anyway. TODO: We need a way to
1972 * tell a re-scheduled open about that error.
1976 DEBUG(10, ("scheduling mid %llu\n", (unsigned long long)state->mid));
1978 ret = schedule_deferred_open_message_smb(state->xconn, state->mid);
1984 /****************************************************************************
1985 On overwrite open ensure that the attributes match.
1986 ****************************************************************************/
1988 static bool open_match_attributes(connection_struct *conn,
1989 uint32_t old_dos_attr,
1990 uint32_t new_dos_attr,
1991 mode_t existing_unx_mode,
1992 mode_t new_unx_mode,
1993 mode_t *returned_unx_mode)
1995 uint32_t noarch_old_dos_attr, noarch_new_dos_attr;
1997 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
1998 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
2000 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
2001 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
2002 *returned_unx_mode = new_unx_mode;
2004 *returned_unx_mode = (mode_t)0;
2007 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
2008 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
2009 "returned_unx_mode = 0%o\n",
2010 (unsigned int)old_dos_attr,
2011 (unsigned int)existing_unx_mode,
2012 (unsigned int)new_dos_attr,
2013 (unsigned int)*returned_unx_mode ));
2015 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
2016 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
2017 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
2018 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
2022 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
2023 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
2024 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
2031 /****************************************************************************
2032 Special FCB or DOS processing in the case of a sharing violation.
2033 Try and find a duplicated file handle.
2034 ****************************************************************************/
2036 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
2037 connection_struct *conn,
2038 files_struct *fsp_to_dup_into,
2039 const struct smb_filename *smb_fname,
2043 uint32_t access_mask,
2044 uint32_t share_access,
2045 uint32_t create_options)
2049 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
2050 "file %s.\n", smb_fname_str_dbg(smb_fname)));
2052 for(fsp = file_find_di_first(conn->sconn, id); fsp;
2053 fsp = file_find_di_next(fsp)) {
2055 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
2056 "vuid = %llu, file_pid = %u, private_options = 0x%x "
2057 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
2058 fsp->fh->fd, (unsigned long long)fsp->vuid,
2059 (unsigned int)fsp->file_pid,
2060 (unsigned int)fsp->fh->private_options,
2061 (unsigned int)fsp->access_mask ));
2063 if (fsp != fsp_to_dup_into &&
2064 fsp->fh->fd != -1 &&
2065 fsp->vuid == vuid &&
2066 fsp->file_pid == file_pid &&
2067 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
2068 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
2069 (fsp->access_mask & FILE_WRITE_DATA) &&
2070 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
2071 strequal(fsp->fsp_name->stream_name,
2072 smb_fname->stream_name)) {
2073 DEBUG(10,("fcb_or_dos_open: file match\n"));
2079 return NT_STATUS_NOT_FOUND;
2082 /* quite an insane set of semantics ... */
2083 if (is_executable(smb_fname->base_name) &&
2084 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
2085 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
2086 return NT_STATUS_INVALID_PARAMETER;
2089 /* We need to duplicate this fsp. */
2090 return dup_file_fsp(req, fsp, access_mask, share_access,
2091 create_options, fsp_to_dup_into);
2094 static void schedule_defer_open(struct share_mode_lock *lck,
2096 struct timeval request_time,
2097 struct smb_request *req)
2099 struct deferred_open_record state;
2101 /* This is a relative time, added to the absolute
2102 request_time value to get the absolute timeout time.
2103 Note that if this is the second or greater time we enter
2104 this codepath for this particular request mid then
2105 request_time is left as the absolute time of the *first*
2106 time this request mid was processed. This is what allows
2107 the request to eventually time out. */
2109 struct timeval timeout;
2111 /* Normally the smbd we asked should respond within
2112 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
2113 * the client did, give twice the timeout as a safety
2114 * measure here in case the other smbd is stuck
2115 * somewhere else. */
2117 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
2119 /* Nothing actually uses state.delayed_for_oplocks
2120 but it's handy to differentiate in debug messages
2121 between a 30 second delay due to oplock break, and
2122 a 1 second delay for share mode conflicts. */
2124 state.delayed_for_oplocks = True;
2125 state.async_open = false;
2128 if (!request_timed_out(request_time, timeout)) {
2129 defer_open(lck, request_time, timeout, req, &state);
2133 /****************************************************************************
2134 Reschedule an open call that went asynchronous.
2135 ****************************************************************************/
2137 static void schedule_async_open(struct timeval request_time,
2138 struct smb_request *req)
2140 struct deferred_open_record state;
2141 struct timeval timeout;
2143 timeout = timeval_set(20, 0);
2146 state.delayed_for_oplocks = false;
2147 state.async_open = true;
2149 if (!request_timed_out(request_time, timeout)) {
2150 defer_open(NULL, request_time, timeout, req, &state);
2154 /****************************************************************************
2155 Work out what access_mask to use from what the client sent us.
2156 ****************************************************************************/
2158 static NTSTATUS smbd_calculate_maximum_allowed_access(
2159 connection_struct *conn,
2160 const struct smb_filename *smb_fname,
2162 uint32_t *p_access_mask)
2164 struct security_descriptor *sd;
2165 uint32_t access_granted;
2168 if (!use_privs && (get_current_uid(conn) == (uid_t)0)) {
2169 *p_access_mask |= FILE_GENERIC_ALL;
2170 return NT_STATUS_OK;
2173 status = SMB_VFS_GET_NT_ACL(conn, smb_fname->base_name,
2179 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2181 * File did not exist
2183 *p_access_mask = FILE_GENERIC_ALL;
2184 return NT_STATUS_OK;
2186 if (!NT_STATUS_IS_OK(status)) {
2187 DEBUG(10,("Could not get acl on file %s: %s\n",
2188 smb_fname_str_dbg(smb_fname),
2189 nt_errstr(status)));
2190 return NT_STATUS_ACCESS_DENIED;
2194 * If we can access the path to this file, by
2195 * default we have FILE_READ_ATTRIBUTES from the
2196 * containing directory. See the section:
2197 * "Algorithm to Check Access to an Existing File"
2200 * se_file_access_check()
2201 * also takes care of owner WRITE_DAC and READ_CONTROL.
2203 status = se_file_access_check(sd,
2204 get_current_nttok(conn),
2206 (*p_access_mask & ~FILE_READ_ATTRIBUTES),
2211 if (!NT_STATUS_IS_OK(status)) {
2212 DEBUG(10, ("Access denied on file %s: "
2213 "when calculating maximum access\n",
2214 smb_fname_str_dbg(smb_fname)));
2215 return NT_STATUS_ACCESS_DENIED;
2217 *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
2219 if (!(access_granted & DELETE_ACCESS)) {
2220 if (can_delete_file_in_directory(conn, smb_fname)) {
2221 *p_access_mask |= DELETE_ACCESS;
2225 return NT_STATUS_OK;
2228 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
2229 const struct smb_filename *smb_fname,
2231 uint32_t access_mask,
2232 uint32_t *access_mask_out)
2235 uint32_t orig_access_mask = access_mask;
2236 uint32_t rejected_share_access;
2239 * Convert GENERIC bits to specific bits.
2242 se_map_generic(&access_mask, &file_generic_mapping);
2244 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
2245 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
2247 status = smbd_calculate_maximum_allowed_access(
2248 conn, smb_fname, use_privs, &access_mask);
2250 if (!NT_STATUS_IS_OK(status)) {
2254 access_mask &= conn->share_access;
2257 rejected_share_access = access_mask & ~(conn->share_access);
2259 if (rejected_share_access) {
2260 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
2261 "file %s: rejected by share access mask[0x%08X] "
2262 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
2263 smb_fname_str_dbg(smb_fname),
2265 orig_access_mask, access_mask,
2266 rejected_share_access));
2267 return NT_STATUS_ACCESS_DENIED;
2270 *access_mask_out = access_mask;
2271 return NT_STATUS_OK;
2274 /****************************************************************************
2275 Remove the deferred open entry under lock.
2276 ****************************************************************************/
2278 /****************************************************************************
2279 Return true if this is a state pointer to an asynchronous create.
2280 ****************************************************************************/
2282 bool is_deferred_open_async(const struct deferred_open_record *rec)
2284 return rec->async_open;
2287 static bool clear_ads(uint32_t create_disposition)
2291 switch (create_disposition) {
2292 case FILE_SUPERSEDE:
2293 case FILE_OVERWRITE_IF:
2294 case FILE_OVERWRITE:
2303 static int disposition_to_open_flags(uint32_t create_disposition)
2308 * Currently we're using FILE_SUPERSEDE as the same as
2309 * FILE_OVERWRITE_IF but they really are
2310 * different. FILE_SUPERSEDE deletes an existing file
2311 * (requiring delete access) then recreates it.
2314 switch (create_disposition) {
2315 case FILE_SUPERSEDE:
2316 case FILE_OVERWRITE_IF:
2318 * If file exists replace/overwrite. If file doesn't
2321 ret = O_CREAT|O_TRUNC;
2326 * If file exists open. If file doesn't exist error.
2331 case FILE_OVERWRITE:
2333 * If file exists overwrite. If file doesn't exist
2341 * If file exists error. If file doesn't exist create.
2343 ret = O_CREAT|O_EXCL;
2348 * If file exists open. If file doesn't exist create.
2356 static int calculate_open_access_flags(uint32_t access_mask,
2357 uint32_t private_flags)
2359 bool need_write, need_read;
2362 * Note that we ignore the append flag as append does not
2363 * mean the same thing under DOS and Unix.
2366 need_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA));
2371 /* DENY_DOS opens are always underlying read-write on the
2372 file handle, no matter what the requested access mask
2376 ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
2377 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|
2378 FILE_READ_EA|FILE_EXECUTE));
2386 /****************************************************************************
2387 Open a file with a share mode. Passed in an already created files_struct *.
2388 ****************************************************************************/
2390 static NTSTATUS open_file_ntcreate(connection_struct *conn,
2391 struct smb_request *req,
2392 uint32_t access_mask, /* access bits (FILE_READ_DATA etc.) */
2393 uint32_t share_access, /* share constants (FILE_SHARE_READ etc) */
2394 uint32_t create_disposition, /* FILE_OPEN_IF etc. */
2395 uint32_t create_options, /* options such as delete on close. */
2396 uint32_t new_dos_attributes, /* attributes used for new file. */
2397 int oplock_request, /* internal Samba oplock codes. */
2398 struct smb2_lease *lease,
2399 /* Information (FILE_EXISTS etc.) */
2400 uint32_t private_flags, /* Samba specific flags. */
2404 struct smb_filename *smb_fname = fsp->fsp_name;
2407 bool file_existed = VALID_STAT(smb_fname->st);
2408 bool def_acl = False;
2409 bool posix_open = False;
2410 bool new_file_created = False;
2411 bool first_open_attempt = true;
2412 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
2413 mode_t new_unx_mode = (mode_t)0;
2414 mode_t unx_mode = (mode_t)0;
2416 uint32_t existing_dos_attributes = 0;
2417 struct timeval request_time = timeval_zero();
2418 struct share_mode_lock *lck = NULL;
2419 uint32_t open_access_mask = access_mask;
2422 SMB_STRUCT_STAT saved_stat = smb_fname->st;
2423 struct timespec old_write_time;
2426 if (conn->printer) {
2428 * Printers are handled completely differently.
2429 * Most of the passed parameters are ignored.
2433 *pinfo = FILE_WAS_CREATED;
2436 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
2437 smb_fname_str_dbg(smb_fname)));
2440 DEBUG(0,("open_file_ntcreate: printer open without "
2441 "an SMB request!\n"));
2442 return NT_STATUS_INTERNAL_ERROR;
2445 return print_spool_open(fsp, smb_fname->base_name,
2449 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
2451 return NT_STATUS_NO_MEMORY;
2454 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
2456 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
2457 new_dos_attributes = 0;
2459 /* Windows allows a new file to be created and
2460 silently removes a FILE_ATTRIBUTE_DIRECTORY
2461 sent by the client. Do the same. */
2463 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
2465 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
2467 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
2468 smb_fname, parent_dir);
2471 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
2472 "access_mask=0x%x share_access=0x%x "
2473 "create_disposition = 0x%x create_options=0x%x "
2474 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
2475 smb_fname_str_dbg(smb_fname), new_dos_attributes,
2476 access_mask, share_access, create_disposition,
2477 create_options, (unsigned int)unx_mode, oplock_request,
2478 (unsigned int)private_flags));
2481 /* Ensure req == NULL means INTERNAL_OPEN_ONLY */
2482 SMB_ASSERT(((oplock_request & INTERNAL_OPEN_ONLY) != 0));
2484 /* And req != NULL means no INTERNAL_OPEN_ONLY */
2485 SMB_ASSERT(((oplock_request & INTERNAL_OPEN_ONLY) == 0));
2489 * Only non-internal opens can be deferred at all
2493 struct deferred_open_record *open_rec;
2494 if (get_deferred_open_message_state(req,
2497 /* Remember the absolute time of the original
2498 request with this mid. We'll use it later to
2499 see if this has timed out. */
2501 /* If it was an async create retry, the file
2504 if (is_deferred_open_async(open_rec)) {
2505 SET_STAT_INVALID(smb_fname->st);
2506 file_existed = false;
2509 /* Ensure we don't reprocess this message. */
2510 remove_deferred_open_message_smb(req->xconn, req->mid);
2512 first_open_attempt = false;
2517 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
2519 existing_dos_attributes = dos_mode(conn, smb_fname);
2523 /* ignore any oplock requests if oplocks are disabled */
2524 if (!lp_oplocks(SNUM(conn)) ||
2525 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
2526 /* Mask off everything except the private Samba bits. */
2527 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
2530 /* this is for OS/2 long file names - say we don't support them */
2531 if (!lp_posix_pathnames() && strstr(smb_fname->base_name,".+,;=[].")) {
2532 /* OS/2 Workplace shell fix may be main code stream in a later
2534 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
2536 if (use_nt_status()) {
2537 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2539 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
2542 switch( create_disposition ) {
2544 /* If file exists open. If file doesn't exist error. */
2545 if (!file_existed) {
2546 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
2547 "requested for file %s and file "
2549 smb_fname_str_dbg(smb_fname)));
2551 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2555 case FILE_OVERWRITE:
2556 /* If file exists overwrite. If file doesn't exist
2558 if (!file_existed) {
2559 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
2560 "requested for file %s and file "
2562 smb_fname_str_dbg(smb_fname) ));
2564 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
2569 /* If file exists error. If file doesn't exist
2572 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
2573 "requested for file %s and file "
2574 "already exists.\n",
2575 smb_fname_str_dbg(smb_fname)));
2576 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
2581 return map_nt_error_from_unix(errno);
2585 case FILE_SUPERSEDE:
2586 case FILE_OVERWRITE_IF:
2590 return NT_STATUS_INVALID_PARAMETER;
2593 flags2 = disposition_to_open_flags(create_disposition);
2595 /* We only care about matching attributes on file exists and
2598 if (!posix_open && file_existed &&
2599 ((create_disposition == FILE_OVERWRITE) ||
2600 (create_disposition == FILE_OVERWRITE_IF))) {
2601 if (!open_match_attributes(conn, existing_dos_attributes,
2603 smb_fname->st.st_ex_mode,
2604 unx_mode, &new_unx_mode)) {
2605 DEBUG(5,("open_file_ntcreate: attributes missmatch "
2606 "for file %s (%x %x) (0%o, 0%o)\n",
2607 smb_fname_str_dbg(smb_fname),
2608 existing_dos_attributes,
2610 (unsigned int)smb_fname->st.st_ex_mode,
2611 (unsigned int)unx_mode ));
2613 return NT_STATUS_ACCESS_DENIED;
2617 status = smbd_calculate_access_mask(conn, smb_fname,
2621 if (!NT_STATUS_IS_OK(status)) {
2622 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
2623 "on file %s returned %s\n",
2624 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
2628 open_access_mask = access_mask;
2630 if (flags2 & O_TRUNC) {
2631 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
2634 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
2635 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
2639 * Note that we ignore the append flag as append does not
2640 * mean the same thing under DOS and Unix.
2643 flags = calculate_open_access_flags(access_mask, private_flags);
2646 * Currently we only look at FILE_WRITE_THROUGH for create options.
2650 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
2655 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
2659 if (!posix_open && !CAN_WRITE(conn)) {
2661 * We should really return a permission denied error if either
2662 * O_CREAT or O_TRUNC are set, but for compatibility with
2663 * older versions of Samba we just AND them out.
2665 flags2 &= ~(O_CREAT|O_TRUNC);
2668 if (first_open_attempt && lp_kernel_oplocks(SNUM(conn))) {
2670 * With kernel oplocks the open breaking an oplock
2671 * blocks until the oplock holder has given up the
2672 * oplock or closed the file. We prevent this by first
2673 * trying to open the file with O_NONBLOCK (see "man
2674 * fcntl" on Linux). For the second try, triggered by
2675 * an oplock break response, we do not need this
2678 * This is true under the assumption that only Samba
2679 * requests kernel oplocks. Once someone else like
2680 * NFSv4 starts to use that API, we will have to
2681 * modify this by communicating with the NFSv4 server.
2683 flags2 |= O_NONBLOCK;
2687 * Ensure we can't write on a read-only share or file.
2690 if (flags != O_RDONLY && file_existed &&
2691 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
2692 DEBUG(5,("open_file_ntcreate: write access requested for "
2693 "file %s on read only %s\n",
2694 smb_fname_str_dbg(smb_fname),
2695 !CAN_WRITE(conn) ? "share" : "file" ));
2697 return NT_STATUS_ACCESS_DENIED;
2700 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
2701 fsp->share_access = share_access;
2702 fsp->fh->private_options = private_flags;
2703 fsp->access_mask = open_access_mask; /* We change this to the
2704 * requested access_mask after
2705 * the open is done. */
2706 fsp->posix_open = posix_open;
2708 if (timeval_is_zero(&request_time)) {
2709 request_time = fsp->open_time;
2713 * Ensure we pay attention to default ACLs on directories if required.
2716 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
2717 (def_acl = directory_has_default_acl(conn, parent_dir))) {
2718 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
2721 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
2722 "access_mask = 0x%x, open_access_mask = 0x%x\n",
2723 (unsigned int)flags, (unsigned int)flags2,
2724 (unsigned int)unx_mode, (unsigned int)access_mask,
2725 (unsigned int)open_access_mask));
2727 fsp_open = open_file(fsp, conn, req, parent_dir,
2728 flags|flags2, unx_mode, access_mask,
2729 open_access_mask, &new_file_created);
2731 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_NETWORK_BUSY)) {
2732 struct deferred_open_record state;
2735 * EWOULDBLOCK/EAGAIN maps to NETWORK_BUSY.
2737 if (file_existed && S_ISFIFO(fsp->fsp_name->st.st_ex_mode)) {
2738 DEBUG(10, ("FIFO busy\n"));
2739 return NT_STATUS_NETWORK_BUSY;
2742 DEBUG(10, ("Internal open busy\n"));
2743 return NT_STATUS_NETWORK_BUSY;
2747 * From here on we assume this is an oplock break triggered
2750 lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
2752 state.delayed_for_oplocks = false;
2753 state.async_open = false;
2754 state.id = fsp->file_id;
2755 defer_open(NULL, request_time, timeval_set(0, 0),
2757 DEBUG(10, ("No share mode lock found after "
2758 "EWOULDBLOCK, retrying sync\n"));
2759 return NT_STATUS_SHARING_VIOLATION;
2762 if (!validate_oplock_types(lck)) {
2763 smb_panic("validate_oplock_types failed");
2766 if (delay_for_oplock(fsp, 0, lease, lck, false,
2767 create_disposition, first_open_attempt)) {
2768 schedule_defer_open(lck, fsp->file_id, request_time,
2771 DEBUG(10, ("Sent oplock break request to kernel "
2772 "oplock holder\n"));
2773 return NT_STATUS_SHARING_VIOLATION;
2777 * No oplock from Samba around. Immediately retry with
2780 state.delayed_for_oplocks = false;
2781 state.async_open = false;
2782 state.id = fsp->file_id;
2783 defer_open(lck, request_time, timeval_set(0, 0), req, &state);
2785 DEBUG(10, ("No Samba oplock around after EWOULDBLOCK. "
2786 "Retrying sync\n"));
2787 return NT_STATUS_SHARING_VIOLATION;
2790 if (!NT_STATUS_IS_OK(fsp_open)) {
2791 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_RETRY)) {
2792 schedule_async_open(request_time, req);
2797 if (new_file_created) {
2799 * As we atomically create using O_CREAT|O_EXCL,
2800 * then if new_file_created is true, then
2801 * file_existed *MUST* have been false (even
2802 * if the file was previously detected as being
2805 file_existed = false;
2808 if (file_existed && !check_same_dev_ino(&saved_stat, &smb_fname->st)) {
2810 * The file did exist, but some other (local or NFS)
2811 * process either renamed/unlinked and re-created the
2812 * file with different dev/ino after we walked the path,
2813 * but before we did the open. We could retry the
2814 * open but it's a rare enough case it's easier to
2815 * just fail the open to prevent creating any problems
2816 * in the open file db having the wrong dev/ino key.
2819 DEBUG(1,("open_file_ntcreate: file %s - dev/ino mismatch. "
2820 "Old (dev=0x%llu, ino =0x%llu). "
2821 "New (dev=0x%llu, ino=0x%llu). Failing open "
2822 " with NT_STATUS_ACCESS_DENIED.\n",
2823 smb_fname_str_dbg(smb_fname),
2824 (unsigned long long)saved_stat.st_ex_dev,
2825 (unsigned long long)saved_stat.st_ex_ino,
2826 (unsigned long long)smb_fname->st.st_ex_dev,
2827 (unsigned long long)smb_fname->st.st_ex_ino));
2828 return NT_STATUS_ACCESS_DENIED;
2831 old_write_time = smb_fname->st.st_ex_mtime;
2834 * Deal with the race condition where two smbd's detect the
2835 * file doesn't exist and do the create at the same time. One
2836 * of them will win and set a share mode, the other (ie. this
2837 * one) should check if the requested share mode for this
2838 * create is allowed.
2842 * Now the file exists and fsp is successfully opened,
2843 * fsp->dev and fsp->inode are valid and should replace the
2844 * dev=0,inode=0 from a non existent file. Spotted by
2845 * Nadav Danieli <nadavd@exanet.com>. JRA.
2850 lck = get_share_mode_lock(talloc_tos(), id,
2852 smb_fname, &old_write_time);
2855 DEBUG(0, ("open_file_ntcreate: Could not get share "
2856 "mode lock for %s\n",
2857 smb_fname_str_dbg(smb_fname)));
2859 return NT_STATUS_SHARING_VIOLATION;
2862 /* Get the types we need to examine. */
2863 if (!validate_oplock_types(lck)) {
2864 smb_panic("validate_oplock_types failed");
2867 if (has_delete_on_close(lck, fsp->name_hash)) {
2870 return NT_STATUS_DELETE_PENDING;
2873 status = open_mode_check(conn, lck,
2874 access_mask, share_access);
2876 if (NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION) ||
2877 (lck->data->num_share_modes > 0)) {
2879 * This comes from ancient times out of open_mode_check. I
2880 * have no clue whether this is still necessary. I can't think
2881 * of a case where this would actually matter further down in
2882 * this function. I leave it here for further investigation
2885 file_existed = true;
2888 if ((req != NULL) &&
2890 fsp, oplock_request, lease, lck,
2891 NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION),
2892 create_disposition, first_open_attempt)) {
2893 schedule_defer_open(lck, fsp->file_id, request_time, req);
2896 return NT_STATUS_SHARING_VIOLATION;
2899 if (!NT_STATUS_IS_OK(status)) {
2900 uint32_t can_access_mask;
2901 bool can_access = True;
2903 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
2905 /* Check if this can be done with the deny_dos and fcb
2908 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
2909 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
2911 DEBUG(0, ("DOS open without an SMB "
2915 return NT_STATUS_INTERNAL_ERROR;
2918 /* Use the client requested access mask here,
2919 * not the one we open with. */
2920 status = fcb_or_dos_open(req,
2931 if (NT_STATUS_IS_OK(status)) {
2934 *pinfo = FILE_WAS_OPENED;
2936 return NT_STATUS_OK;
2941 * This next line is a subtlety we need for
2942 * MS-Access. If a file open will fail due to share
2943 * permissions and also for security (access) reasons,
2944 * we need to return the access failed error, not the
2945 * share error. We can't open the file due to kernel
2946 * oplock deadlock (it's possible we failed above on
2947 * the open_mode_check()) so use a userspace check.
2950 if (flags & O_RDWR) {
2951 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
2952 } else if (flags & O_WRONLY) {
2953 can_access_mask = FILE_WRITE_DATA;
2955 can_access_mask = FILE_READ_DATA;
2958 if (((can_access_mask & FILE_WRITE_DATA) &&
2959 !CAN_WRITE(conn)) ||
2960 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
2963 can_access_mask))) {
2968 * If we're returning a share violation, ensure we
2969 * cope with the braindead 1 second delay (SMB1 only).
2972 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
2973 !conn->sconn->using_smb2 &&
2974 lp_defer_sharing_violations()) {
2975 struct timeval timeout;
2976 struct deferred_open_record state;
2979 /* this is a hack to speed up torture tests
2981 timeout_usecs = lp_parm_int(SNUM(conn),
2982 "smbd","sharedelay",
2983 SHARING_VIOLATION_USEC_WAIT);
2985 /* This is a relative time, added to the absolute
2986 request_time value to get the absolute timeout time.
2987 Note that if this is the second or greater time we enter
2988 this codepath for this particular request mid then
2989 request_time is left as the absolute time of the *first*
2990 time this request mid was processed. This is what allows
2991 the request to eventually time out. */
2993 timeout = timeval_set(0, timeout_usecs);
2995 /* Nothing actually uses state.delayed_for_oplocks
2996 but it's handy to differentiate in debug messages
2997 between a 30 second delay due to oplock break, and
2998 a 1 second delay for share mode conflicts. */
3000 state.delayed_for_oplocks = False;
3001 state.async_open = false;
3005 && !request_timed_out(request_time,
3007 defer_open(lck, request_time, timeout,
3016 * We have detected a sharing violation here
3017 * so return the correct error code
3019 status = NT_STATUS_SHARING_VIOLATION;
3021 status = NT_STATUS_ACCESS_DENIED;
3026 /* Should we atomically (to the client at least) truncate ? */
3027 if ((!new_file_created) &&
3028 (flags2 & O_TRUNC) &&
3029 (!S_ISFIFO(fsp->fsp_name->st.st_ex_mode))) {
3032 ret = vfs_set_filelen(fsp, 0);
3034 status = map_nt_error_from_unix(errno);
3042 * We have the share entry *locked*.....
3045 /* Delete streams if create_disposition requires it */
3046 if (!new_file_created && clear_ads(create_disposition) &&
3047 !is_ntfs_stream_smb_fname(smb_fname)) {
3048 status = delete_all_streams(conn, smb_fname->base_name);
3049 if (!NT_STATUS_IS_OK(status)) {
3056 /* note that we ignore failure for the following. It is
3057 basically a hack for NFS, and NFS will never set one of
3058 these only read them. Nobody but Samba can ever set a deny
3059 mode and we have already checked our more authoritative
3060 locking database for permission to set this deny mode. If
3061 the kernel refuses the operations then the kernel is wrong.
3062 note that GPFS supports it as well - jmcd */
3064 if (fsp->fh->fd != -1 && lp_kernel_share_modes(SNUM(conn))) {
3067 * Beware: streams implementing VFS modules may
3068 * implement streams in a way that fsp will have the
3069 * basefile open in the fsp fd, so lacking a distinct
3070 * fd for the stream kernel_flock will apply on the
3071 * basefile which is wrong. The actual check is
3072 * deffered to the VFS module implementing the
3073 * kernel_flock call.
3075 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
3076 if(ret_flock == -1 ){
3081 return NT_STATUS_SHARING_VIOLATION;
3086 * At this point onwards, we can guarantee that the share entry
3087 * is locked, whether we created the file or not, and that the
3088 * deny mode is compatible with all current opens.
3092 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
3093 * but we don't have to store this - just ignore it on access check.
3095 if (conn->sconn->using_smb2) {
3097 * SMB2 doesn't return it (according to Microsoft tests).
3098 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
3099 * File created with access = 0x7 (Read, Write, Delete)
3100 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
3102 fsp->access_mask = access_mask;
3104 /* But SMB1 does. */
3105 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3110 * stat opens on existing files don't get oplocks.
3111 * They can get leases.
3113 * Note that we check for stat open on the *open_access_mask*,
3114 * i.e. the access mask we actually used to do the open,
3115 * not the one the client asked for (which is in
3116 * fsp->access_mask). This is due to the fact that
3117 * FILE_OVERWRITE and FILE_OVERWRITE_IF add in O_TRUNC,
3118 * which adds FILE_WRITE_DATA to open_access_mask.
3120 if (is_stat_open(open_access_mask) && lease == NULL) {
3121 oplock_request = NO_OPLOCK;
3125 if (new_file_created) {
3126 info = FILE_WAS_CREATED;
3128 if (flags2 & O_TRUNC) {
3129 info = FILE_WAS_OVERWRITTEN;
3131 info = FILE_WAS_OPENED;
3140 * Setup the oplock info in both the shared memory and
3143 status = grant_fsp_oplock_type(req, fsp, lck, oplock_request, lease);
3144 if (!NT_STATUS_IS_OK(status)) {
3150 /* Handle strange delete on close create semantics. */
3151 if (create_options & FILE_DELETE_ON_CLOSE) {
3153 status = can_set_delete_on_close(fsp, new_dos_attributes);
3155 if (!NT_STATUS_IS_OK(status)) {
3156 /* Remember to delete the mode we just added. */
3157 del_share_mode(lck, fsp);
3162 /* Note that here we set the *inital* delete on close flag,
3163 not the regular one. The magic gets handled in close. */
3164 fsp->initial_delete_on_close = True;
3167 if (info != FILE_WAS_OPENED) {
3168 /* Files should be initially set as archive */
3169 if (lp_map_archive(SNUM(conn)) ||
3170 lp_store_dos_attributes(SNUM(conn))) {
3172 if (file_set_dosmode(conn, smb_fname,
3173 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
3174 parent_dir, true) == 0) {
3175 unx_mode = smb_fname->st.st_ex_mode;
3181 /* Determine sparse flag. */
3183 /* POSIX opens are sparse by default. */
3184 fsp->is_sparse = true;
3186 fsp->is_sparse = (file_existed &&
3187 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
3191 * Take care of inherited ACLs on created files - if default ACL not
3195 if (!posix_open && new_file_created && !def_acl) {
3197 int saved_errno = errno; /* We might get ENOSYS in the next
3200 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
3202 errno = saved_errno; /* Ignore ENOSYS */
3205 } else if (new_unx_mode) {
3209 /* Attributes need changing. File already existed. */
3212 int saved_errno = errno; /* We might get ENOSYS in the
3214 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
3216 if (ret == -1 && errno == ENOSYS) {
3217 errno = saved_errno; /* Ignore ENOSYS */
3219 DEBUG(5, ("open_file_ntcreate: reset "
3220 "attributes of file %s to 0%o\n",
3221 smb_fname_str_dbg(smb_fname),
3222 (unsigned int)new_unx_mode));
3223 ret = 0; /* Don't do the fchmod below. */
3228 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
3229 DEBUG(5, ("open_file_ntcreate: failed to reset "
3230 "attributes of file %s to 0%o\n",
3231 smb_fname_str_dbg(smb_fname),
3232 (unsigned int)new_unx_mode));
3237 * Deal with other opens having a modified write time.
3239 struct timespec write_time = get_share_mode_write_time(lck);
3241 if (!null_timespec(write_time)) {
3242 update_stat_ex_mtime(&fsp->fsp_name->st, write_time);
3248 return NT_STATUS_OK;
3251 static NTSTATUS mkdir_internal(connection_struct *conn,
3252 struct smb_filename *smb_dname,
3253 uint32_t file_attributes)
3256 char *parent_dir = NULL;
3258 bool posix_open = false;
3259 bool need_re_stat = false;
3260 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
3262 if (!CAN_WRITE(conn) || (access_mask & ~(conn->share_access))) {
3263 DEBUG(5,("mkdir_internal: failing share access "
3264 "%s\n", lp_servicename(talloc_tos(), SNUM(conn))));
3265 return NT_STATUS_ACCESS_DENIED;
3268 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
3270 return NT_STATUS_NO_MEMORY;
3273 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3275 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
3277 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
3280 status = check_parent_access(conn,
3283 if(!NT_STATUS_IS_OK(status)) {
3284 DEBUG(5,("mkdir_internal: check_parent_access "
3285 "on directory %s for path %s returned %s\n",
3287 smb_dname->base_name,
3288 nt_errstr(status) ));
3292 if (SMB_VFS_MKDIR(conn, smb_dname->base_name, mode) != 0) {
3293 return map_nt_error_from_unix(errno);
3296 /* Ensure we're checking for a symlink here.... */
3297 /* We don't want to get caught by a symlink racer. */
3299 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
3300 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
3301 smb_fname_str_dbg(smb_dname), strerror(errno)));
3302 return map_nt_error_from_unix(errno);
3305 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
3306 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
3307 smb_fname_str_dbg(smb_dname)));
3308 return NT_STATUS_NOT_A_DIRECTORY;
3311 if (lp_store_dos_attributes(SNUM(conn))) {
3313 file_set_dosmode(conn, smb_dname,
3314 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
3319 if (lp_inherit_permissions(SNUM(conn))) {
3320 inherit_access_posix_acl(conn, parent_dir,
3321 smb_dname->base_name, mode);
3322 need_re_stat = true;
3327 * Check if high bits should have been set,
3328 * then (if bits are missing): add them.
3329 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
3332 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
3333 (mode & ~smb_dname->st.st_ex_mode)) {
3334 SMB_VFS_CHMOD(conn, smb_dname->base_name,
3335 (smb_dname->st.st_ex_mode |
3336 (mode & ~smb_dname->st.st_ex_mode)));
3337 need_re_stat = true;
3341 /* Change the owner if required. */
3342 if (lp_inherit_owner(SNUM(conn))) {
3343 change_dir_owner_to_parent(conn, parent_dir,
3344 smb_dname->base_name,
3346 need_re_stat = true;
3350 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
3351 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
3352 smb_fname_str_dbg(smb_dname), strerror(errno)));
3353 return map_nt_error_from_unix(errno);
3357 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
3358 smb_dname->base_name);
3360 return NT_STATUS_OK;
3363 /****************************************************************************
3364 Open a directory from an NT SMB call.
3365 ****************************************************************************/
3367 static NTSTATUS open_directory(connection_struct *conn,
3368 struct smb_request *req,
3369 struct smb_filename *smb_dname,
3370 uint32_t access_mask,
3371 uint32_t share_access,
3372 uint32_t create_disposition,
3373 uint32_t create_options,
3374 uint32_t file_attributes,
3376 files_struct **result)
3378 files_struct *fsp = NULL;
3379 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
3380 struct share_mode_lock *lck = NULL;
3382 struct timespec mtimespec;
3386 if (is_ntfs_stream_smb_fname(smb_dname)) {
3387 DEBUG(2, ("open_directory: %s is a stream name!\n",
3388 smb_fname_str_dbg(smb_dname)));
3389 return NT_STATUS_NOT_A_DIRECTORY;
3392 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
3393 /* Ensure we have a directory attribute. */
3394 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
3397 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
3398 "share_access = 0x%x create_options = 0x%x, "
3399 "create_disposition = 0x%x, file_attributes = 0x%x\n",
3400 smb_fname_str_dbg(smb_dname),
3401 (unsigned int)access_mask,
3402 (unsigned int)share_access,
3403 (unsigned int)create_options,
3404 (unsigned int)create_disposition,
3405 (unsigned int)file_attributes));
3407 status = smbd_calculate_access_mask(conn, smb_dname, false,
3408 access_mask, &access_mask);
3409 if (!NT_STATUS_IS_OK(status)) {
3410 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
3411 "on file %s returned %s\n",
3412 smb_fname_str_dbg(smb_dname),
3413 nt_errstr(status)));
3417 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
3418 !security_token_has_privilege(get_current_nttok(conn),
3419 SEC_PRIV_SECURITY)) {
3420 DEBUG(10, ("open_directory: open on %s "
3421 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
3422 smb_fname_str_dbg(smb_dname)));
3423 return NT_STATUS_PRIVILEGE_NOT_HELD;
3426 switch( create_disposition ) {
3430 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
3433 info = FILE_WAS_OPENED;
3438 /* If directory exists error. If directory doesn't
3442 status = NT_STATUS_OBJECT_NAME_COLLISION;
3443 DEBUG(2, ("open_directory: unable to create "
3444 "%s. Error was %s\n",
3445 smb_fname_str_dbg(smb_dname),
3446 nt_errstr(status)));
3450 status = mkdir_internal(conn, smb_dname,
3453 if (!NT_STATUS_IS_OK(status)) {
3454 DEBUG(2, ("open_directory: unable to create "
3455 "%s. Error was %s\n",
3456 smb_fname_str_dbg(smb_dname),
3457 nt_errstr(status)));
3461 info = FILE_WAS_CREATED;
3466 * If directory exists open. If directory doesn't
3471 status = NT_STATUS_OK;
3472 info = FILE_WAS_OPENED;
3474 status = mkdir_internal(conn, smb_dname,
3477 if (NT_STATUS_IS_OK(status)) {
3478 info = FILE_WAS_CREATED;
3480 /* Cope with create race. */
3481 if (!NT_STATUS_EQUAL(status,
3482 NT_STATUS_OBJECT_NAME_COLLISION)) {
3483 DEBUG(2, ("open_directory: unable to create "
3484 "%s. Error was %s\n",
3485 smb_fname_str_dbg(smb_dname),
3486 nt_errstr(status)));
3491 * If mkdir_internal() returned
3492 * NT_STATUS_OBJECT_NAME_COLLISION
3493 * we still must lstat the path.
3496 if (SMB_VFS_LSTAT(conn, smb_dname)
3498 DEBUG(2, ("Could not stat "
3499 "directory '%s' just "
3504 return map_nt_error_from_unix(
3508 info = FILE_WAS_OPENED;
3514 case FILE_SUPERSEDE:
3515 case FILE_OVERWRITE:
3516 case FILE_OVERWRITE_IF:
3518 DEBUG(5,("open_directory: invalid create_disposition "
3519 "0x%x for directory %s\n",
3520 (unsigned int)create_disposition,
3521 smb_fname_str_dbg(smb_dname)));
3522 return NT_STATUS_INVALID_PARAMETER;
3525 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
3526 DEBUG(5,("open_directory: %s is not a directory !\n",
3527 smb_fname_str_dbg(smb_dname)));
3528 return NT_STATUS_NOT_A_DIRECTORY;
3531 if (info == FILE_WAS_OPENED) {
3532 status = smbd_check_access_rights(conn,
3536 if (!NT_STATUS_IS_OK(status)) {
3537 DEBUG(10, ("open_directory: smbd_check_access_rights on "
3538 "file %s failed with %s\n",
3539 smb_fname_str_dbg(smb_dname),
3540 nt_errstr(status)));
3545 status = file_new(req, conn, &fsp);
3546 if(!NT_STATUS_IS_OK(status)) {
3551 * Setup the files_struct for it.
3554 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
3555 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
3556 fsp->file_pid = req ? req->smbpid : 0;
3557 fsp->can_lock = False;
3558 fsp->can_read = False;
3559 fsp->can_write = False;
3561 fsp->share_access = share_access;
3562 fsp->fh->private_options = 0;
3564 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
3566 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3567 fsp->print_file = NULL;
3568 fsp->modified = False;
3569 fsp->oplock_type = NO_OPLOCK;
3570 fsp->sent_oplock_break = NO_BREAK_SENT;
3571 fsp->is_directory = True;
3572 fsp->posix_open = (file_attributes & FILE_FLAG_POSIX_SEMANTICS) ? True : False;
3573 status = fsp_set_smb_fname(fsp, smb_dname);
3574 if (!NT_STATUS_IS_OK(status)) {
3575 file_free(req, fsp);
3579 /* Don't store old timestamps for directory
3580 handles in the internal database. We don't
3581 update them in there if new objects
3582 are creaded in the directory. Currently
3583 we only update timestamps on file writes.
3586 ZERO_STRUCT(mtimespec);
3588 if (access_mask & (FILE_LIST_DIRECTORY|
3590 FILE_ADD_SUBDIRECTORY|
3593 FILE_DELETE_CHILD)) {
3595 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
3597 /* POSIX allows us to open a directory with O_RDONLY. */
3598 status = fd_open(conn, fsp, O_RDONLY, 0);
3600 if (!NT_STATUS_IS_OK(status)) {
3601 DEBUG(5, ("open_directory: Could not open fd for "
3603 smb_fname_str_dbg(smb_dname),
3604 nt_errstr(status)));
3605 file_free(req, fsp);
3610 DEBUG(10, ("Not opening Directory %s\n",
3611 smb_fname_str_dbg(smb_dname)));
3614 status = vfs_stat_fsp(fsp);
3615 if (!NT_STATUS_IS_OK(status)) {
3617 file_free(req, fsp);
3621 /* Ensure there was no race condition. */
3622 if (!check_same_stat(&smb_dname->st, &fsp->fsp_name->st)) {
3623 DEBUG(5,("open_directory: stat struct differs for "
3625 smb_fname_str_dbg(smb_dname)));
3627 file_free(req, fsp);
3628 return NT_STATUS_ACCESS_DENIED;
3631 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
3632 conn->connectpath, smb_dname,
3636 DEBUG(0, ("open_directory: Could not get share mode lock for "
3637 "%s\n", smb_fname_str_dbg(smb_dname)));
3639 file_free(req, fsp);
3640 return NT_STATUS_SHARING_VIOLATION;
3643 if (has_delete_on_close(lck, fsp->name_hash)) {
3646 file_free(req, fsp);
3647 return NT_STATUS_DELETE_PENDING;
3650 status = open_mode_check(conn, lck,
3651 access_mask, share_access);
3653 if (!NT_STATUS_IS_OK(status)) {
3656 file_free(req, fsp);
3660 ok = set_share_mode(lck, fsp, get_current_uid(conn),
3661 req ? req->mid : 0, NO_OPLOCK,
3666 file_free(req, fsp);
3667 return NT_STATUS_NO_MEMORY;
3670 /* For directories the delete on close bit at open time seems
3671 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
3672 if (create_options & FILE_DELETE_ON_CLOSE) {
3673 status = can_set_delete_on_close(fsp, 0);
3674 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
3675 del_share_mode(lck, fsp);
3678 file_free(req, fsp);
3682 if (NT_STATUS_IS_OK(status)) {
3683 /* Note that here we set the *inital* delete on close flag,
3684 not the regular one. The magic gets handled in close. */
3685 fsp->initial_delete_on_close = True;
3691 * Deal with other opens having a modified write time. Is this
3692 * possible for directories?
3694 struct timespec write_time = get_share_mode_write_time(lck);
3696 if (!null_timespec(write_time)) {
3697 update_stat_ex_mtime(&fsp->fsp_name->st, write_time);
3708 return NT_STATUS_OK;
3711 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
3712 struct smb_filename *smb_dname)
3717 status = SMB_VFS_CREATE_FILE(
3720 0, /* root_dir_fid */
3721 smb_dname, /* fname */
3722 FILE_READ_ATTRIBUTES, /* access_mask */
3723 FILE_SHARE_NONE, /* share_access */
3724 FILE_CREATE, /* create_disposition*/
3725 FILE_DIRECTORY_FILE, /* create_options */
3726 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
3727 0, /* oplock_request */
3729 0, /* allocation_size */
3730 0, /* private_flags */
3735 NULL, NULL); /* create context */
3737 if (NT_STATUS_IS_OK(status)) {
3738 close_file(req, fsp, NORMAL_CLOSE);
3744 /****************************************************************************
3745 Receive notification that one of our open files has been renamed by another
3747 ****************************************************************************/
3749 void msg_file_was_renamed(struct messaging_context *msg,
3752 struct server_id server_id,
3756 char *frm = (char *)data->data;
3758 const char *sharepath;
3759 const char *base_name;
3760 const char *stream_name;
3761 struct smb_filename *smb_fname = NULL;
3762 size_t sp_len, bn_len;
3764 struct smbd_server_connection *sconn =
3765 talloc_get_type_abort(private_data,
3766 struct smbd_server_connection);
3768 if (data->data == NULL
3769 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
3770 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
3771 (int)data->length));
3775 /* Unpack the message. */
3776 pull_file_id_24(frm, &id);
3777 sharepath = &frm[24];
3778 sp_len = strlen(sharepath);
3779 base_name = sharepath + sp_len + 1;
3780 bn_len = strlen(base_name);
3781 stream_name = sharepath + sp_len + 1 + bn_len + 1;
3783 /* stream_name must always be NULL if there is no stream. */
3784 if (stream_name[0] == '\0') {
3788 smb_fname = synthetic_smb_fname(talloc_tos(), base_name,
3790 if (smb_fname == NULL) {
3794 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
3796 sharepath, smb_fname_str_dbg(smb_fname),
3797 file_id_string_tos(&id)));
3799 for(fsp = file_find_di_first(sconn, id); fsp;
3800 fsp = file_find_di_next(fsp)) {
3801 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
3803 DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
3804 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
3805 smb_fname_str_dbg(smb_fname)));
3806 status = fsp_set_smb_fname(fsp, smb_fname);
3807 if (!NT_STATUS_IS_OK(status)) {
3812 /* Now we have the complete path we can work out if this is
3813 actually within this share and adjust newname accordingly. */
3814 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
3815 "not sharepath %s) "
3816 "%s from %s -> %s\n",
3817 fsp->conn->connectpath,
3821 smb_fname_str_dbg(smb_fname)));
3825 TALLOC_FREE(smb_fname);
3830 * If a main file is opened for delete, all streams need to be checked for
3831 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
3832 * If that works, delete them all by setting the delete on close and close.
3835 NTSTATUS open_streams_for_delete(connection_struct *conn,
3838 struct stream_struct *stream_info = NULL;
3839 files_struct **streams = NULL;
3841 unsigned int num_streams = 0;
3842 TALLOC_CTX *frame = talloc_stackframe();
3845 status = vfs_streaminfo(conn, NULL, fname, talloc_tos(),
3846 &num_streams, &stream_info);
3848 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
3849 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
3850 DEBUG(10, ("no streams around\n"));
3852 return NT_STATUS_OK;
3855 if (!NT_STATUS_IS_OK(status)) {
3856 DEBUG(10, ("vfs_streaminfo failed: %s\n",
3857 nt_errstr(status)));
3861 DEBUG(10, ("open_streams_for_delete found %d streams\n",
3864 if (num_streams == 0) {
3866 return NT_STATUS_OK;
3869 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
3870 if (streams == NULL) {
3871 DEBUG(0, ("talloc failed\n"));
3872 status = NT_STATUS_NO_MEMORY;
3876 for (i=0; i<num_streams; i++) {
3877 struct smb_filename *smb_fname;
3879 if (strequal(stream_info[i].name, "::$DATA")) {
3884 smb_fname = synthetic_smb_fname(
3885 talloc_tos(), fname, stream_info[i].name, NULL);
3886 if (smb_fname == NULL) {
3887 status = NT_STATUS_NO_MEMORY;
3891 if (SMB_VFS_STAT(conn, smb_fname) == -1) {
3892 DEBUG(10, ("Unable to stat stream: %s\n",
3893 smb_fname_str_dbg(smb_fname)));
3896 status = SMB_VFS_CREATE_FILE(
3899 0, /* root_dir_fid */
3900 smb_fname, /* fname */
3901 DELETE_ACCESS, /* access_mask */
3902 (FILE_SHARE_READ | /* share_access */
3903 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
3904 FILE_OPEN, /* create_disposition*/
3905 0, /* create_options */
3906 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
3907 0, /* oplock_request */
3909 0, /* allocation_size */
3910 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
3913 &streams[i], /* result */
3915 NULL, NULL); /* create context */
3917 if (!NT_STATUS_IS_OK(status)) {
3918 DEBUG(10, ("Could not open stream %s: %s\n",
3919 smb_fname_str_dbg(smb_fname),
3920 nt_errstr(status)));
3922 TALLOC_FREE(smb_fname);
3925 TALLOC_FREE(smb_fname);
3929 * don't touch the variable "status" beyond this point :-)
3932 for (i -= 1 ; i >= 0; i--) {
3933 if (streams[i] == NULL) {
3937 DEBUG(10, ("Closing stream # %d, %s\n", i,
3938 fsp_str_dbg(streams[i])));
3939 close_file(NULL, streams[i], NORMAL_CLOSE);
3947 /*********************************************************************
3948 Create a default ACL by inheriting from the parent. If no inheritance
3949 from the parent available, don't set anything. This will leave the actual
3950 permissions the new file or directory already got from the filesystem
3951 as the NT ACL when read.
3952 *********************************************************************/
3954 static NTSTATUS inherit_new_acl(files_struct *fsp)
3956 TALLOC_CTX *frame = talloc_stackframe();
3957 char *parent_name = NULL;
3958 struct security_descriptor *parent_desc = NULL;
3959 NTSTATUS status = NT_STATUS_OK;
3960 struct security_descriptor *psd = NULL;
3961 const struct dom_sid *owner_sid = NULL;
3962 const struct dom_sid *group_sid = NULL;
3963 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
3964 struct security_token *token = fsp->conn->session_info->security_token;
3965 bool inherit_owner = lp_inherit_owner(SNUM(fsp->conn));
3966 bool inheritable_components = false;
3967 bool try_builtin_administrators = false;
3968 const struct dom_sid *BA_U_sid = NULL;
3969 const struct dom_sid *BA_G_sid = NULL;
3970 bool try_system = false;
3971 const struct dom_sid *SY_U_sid = NULL;
3972 const struct dom_sid *SY_G_sid = NULL;
3975 if (!parent_dirname(frame, fsp->fsp_name->base_name, &parent_name, NULL)) {
3977 return NT_STATUS_NO_MEMORY;
3980 status = SMB_VFS_GET_NT_ACL(fsp->conn,
3982 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
3985 if (!NT_STATUS_IS_OK(status)) {
3990 inheritable_components = sd_has_inheritable_components(parent_desc,
3993 if (!inheritable_components && !inherit_owner) {
3995 /* Nothing to inherit and not setting owner. */
3996 return NT_STATUS_OK;
3999 /* Create an inherited descriptor from the parent. */
4001 if (DEBUGLEVEL >= 10) {
4002 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
4003 fsp_str_dbg(fsp) ));
4004 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
4007 /* Inherit from parent descriptor if "inherit owner" set. */
4008 if (inherit_owner) {
4009 owner_sid = parent_desc->owner_sid;
4010 group_sid = parent_desc->group_sid;
4013 if (owner_sid == NULL) {
4014 if (security_token_has_builtin_administrators(token)) {
4015 try_builtin_administrators = true;
4016 } else if (security_token_is_system(token)) {
4017 try_builtin_administrators = true;
4022 if (group_sid == NULL &&
4023 token->num_sids == PRIMARY_GROUP_SID_INDEX)
4025 if (security_token_is_system(token)) {
4026 try_builtin_administrators = true;
4031 if (try_builtin_administrators) {
4036 ok = sids_to_unixids(&global_sid_Builtin_Administrators, 1, &ids);
4040 BA_U_sid = &global_sid_Builtin_Administrators;
4041 BA_G_sid = &global_sid_Builtin_Administrators;
4044 BA_U_sid = &global_sid_Builtin_Administrators;
4047 BA_G_sid = &global_sid_Builtin_Administrators;
4060 ok = sids_to_unixids(&global_sid_System, 1, &ids);
4064 SY_U_sid = &global_sid_System;
4065 SY_G_sid = &global_sid_System;
4068 SY_U_sid = &global_sid_System;
4071 SY_G_sid = &global_sid_System;
4079 if (owner_sid == NULL) {
4080 owner_sid = BA_U_sid;
4083 if (owner_sid == NULL) {
4084 owner_sid = SY_U_sid;
4087 if (group_sid == NULL) {
4088 group_sid = SY_G_sid;
4091 if (try_system && group_sid == NULL) {
4092 group_sid = BA_G_sid;
4095 if (owner_sid == NULL) {
4096 owner_sid = &token->sids[PRIMARY_USER_SID_INDEX];
4098 if (group_sid == NULL) {
4099 if (token->num_sids == PRIMARY_GROUP_SID_INDEX) {
4100 group_sid = &token->sids[PRIMARY_USER_SID_INDEX];
4102 group_sid = &token->sids[PRIMARY_GROUP_SID_INDEX];
4106 status = se_create_child_secdesc(frame,
4113 if (!NT_STATUS_IS_OK(status)) {
4118 /* If inheritable_components == false,
4119 se_create_child_secdesc()
4120 creates a security desriptor with a NULL dacl
4121 entry, but with SEC_DESC_DACL_PRESENT. We need
4122 to remove that flag. */
4124 if (!inheritable_components) {
4125 security_info_sent &= ~SECINFO_DACL;
4126 psd->type &= ~SEC_DESC_DACL_PRESENT;
4129 if (DEBUGLEVEL >= 10) {
4130 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
4131 fsp_str_dbg(fsp) ));
4132 NDR_PRINT_DEBUG(security_descriptor, psd);
4135 if (inherit_owner) {
4136 /* We need to be root to force this. */
4139 status = SMB_VFS_FSET_NT_ACL(fsp,
4142 if (inherit_owner) {
4150 * If we already have a lease, it must match the new file id. [MS-SMB2]
4151 * 3.3.5.9.8 speaks about INVALID_PARAMETER if an already used lease key is
4152 * used for a different file name.
4155 struct lease_match_state {
4156 /* Input parameters. */
4157 TALLOC_CTX *mem_ctx;
4158 const char *servicepath;
4159 const struct smb_filename *fname;
4162 /* Return parameters. */
4163 uint32_t num_file_ids;
4164 struct file_id *ids;
4165 NTSTATUS match_status;
4168 /*************************************************************
4169 File doesn't exist but this lease key+guid is already in use.
4171 This is only allowable in the dynamic share case where the
4172 service path must be different.
4174 There is a small race condition here in the multi-connection
4175 case where a client sends two create calls on different connections,
4176 where the file doesn't exist and one smbd creates the leases_db
4177 entry first, but this will get fixed by the multichannel cleanup
4178 when all identical client_guids get handled by a single smbd.
4179 **************************************************************/
4181 static void lease_match_parser_new_file(
4183 const struct leases_db_file *files,
4184 struct lease_match_state *state)
4188 for (i = 0; i < num_files; i++) {
4189 const struct leases_db_file *f = &files[i];
4190 if (strequal(state->servicepath, f->servicepath)) {
4191 state->match_status = NT_STATUS_INVALID_PARAMETER;
4196 /* Dynamic share case. Break leases on all other files. */
4197 state->match_status = leases_db_copy_file_ids(state->mem_ctx,
4201 if (!NT_STATUS_IS_OK(state->match_status)) {
4205 state->num_file_ids = num_files;
4206 state->match_status = NT_STATUS_OPLOCK_NOT_GRANTED;
4210 static void lease_match_parser(
4212 const struct leases_db_file *files,
4215 struct lease_match_state *state =
4216 (struct lease_match_state *)private_data;
4219 if (!state->file_existed) {
4221 * Deal with name mismatch or
4222 * possible dynamic share case separately
4223 * to make code clearer.
4225 lease_match_parser_new_file(num_files,
4232 state->match_status = NT_STATUS_OK;
4234 for (i = 0; i < num_files; i++) {
4235 const struct leases_db_file *f = &files[i];
4237 /* Everything should be the same. */
4238 if (!file_id_equal(&state->id, &f->id)) {
4239 /* This should catch all dynamic share cases. */
4240 state->match_status = NT_STATUS_OPLOCK_NOT_GRANTED;
4243 if (!strequal(f->servicepath, state->servicepath)) {
4244 state->match_status = NT_STATUS_INVALID_PARAMETER;
4247 if (!strequal(f->base_name, state->fname->base_name)) {
4248 state->match_status = NT_STATUS_INVALID_PARAMETER;
4251 if (!strequal(f->stream_name, state->fname->stream_name)) {
4252 state->match_status = NT_STATUS_INVALID_PARAMETER;
4257 if (NT_STATUS_IS_OK(state->match_status)) {
4259 * Common case - just opening another handle on a
4260 * file on a non-dynamic share.
4265 if (NT_STATUS_EQUAL(state->match_status, NT_STATUS_INVALID_PARAMETER)) {
4266 /* Mismatched path. Error back to client. */
4271 * File id mismatch. Dynamic share case NT_STATUS_OPLOCK_NOT_GRANTED.
4272 * Don't allow leases.
4275 state->match_status = leases_db_copy_file_ids(state->mem_ctx,
4279 if (!NT_STATUS_IS_OK(state->match_status)) {
4283 state->num_file_ids = num_files;
4284 state->match_status = NT_STATUS_OPLOCK_NOT_GRANTED;
4288 static NTSTATUS lease_match(connection_struct *conn,
4289 struct smb_request *req,
4290 struct smb2_lease_key *lease_key,
4291 const char *servicepath,
4292 const struct smb_filename *fname,
4293 uint16_t *p_version,
4296 struct smbd_server_connection *sconn = req->sconn;
4297 TALLOC_CTX *tos = talloc_tos();
4298 struct lease_match_state state = {
4300 .servicepath = servicepath,
4302 .match_status = NT_STATUS_OK
4307 state.file_existed = VALID_STAT(fname->st);
4308 if (state.file_existed) {
4309 state.id = vfs_file_id_from_sbuf(conn, &fname->st);
4311 memset(&state.id, '\0', sizeof(state.id));
4314 status = leases_db_parse(&sconn->client->connections->smb2.client.guid,
4315 lease_key, lease_match_parser, &state);
4316 if (!NT_STATUS_IS_OK(status)) {
4318 * Not found or error means okay: We can make the lease pass
4320 return NT_STATUS_OK;
4322 if (!NT_STATUS_EQUAL(state.match_status, NT_STATUS_OPLOCK_NOT_GRANTED)) {
4324 * Anything but NT_STATUS_OPLOCK_NOT_GRANTED, let the caller
4327 return state.match_status;
4330 /* We have to break all existing leases. */
4331 for (i = 0; i < state.num_file_ids; i++) {
4332 struct share_mode_lock *lck;
4333 struct share_mode_data *d;
4336 if (file_id_equal(&state.ids[i], &state.id)) {
4337 /* Don't need to break our own file. */
4341 lck = get_existing_share_mode_lock(talloc_tos(), state.ids[i]);
4343 /* Race condition - file already closed. */
4347 for (j=0; j<d->num_share_modes; j++) {
4348 struct share_mode_entry *e = &d->share_modes[j];
4349 uint32_t e_lease_type = get_lease_type(d, e);
4350 struct share_mode_lease *l = NULL;
4352 if (share_mode_stale_pid(d, j)) {
4356 if (e->op_type == LEASE_OPLOCK) {
4357 l = &lck->data->leases[e->lease_idx];
4358 if (!smb2_lease_key_equal(&l->lease_key,
4362 *p_epoch = l->epoch;
4363 *p_version = l->lease_version;
4366 if (e_lease_type == SMB2_LEASE_NONE) {
4370 send_break_message(conn->sconn->msg_ctx, e,
4374 * Windows 7 and 8 lease clients
4375 * are broken in that they will not
4376 * respond to lease break requests
4377 * whilst waiting for an outstanding
4378 * open request on that lease handle
4379 * on the same TCP connection, due
4380 * to holding an internal inode lock.
4382 * This means we can't reschedule
4383 * ourselves here, but must return
4388 * Send the breaks and then return
4389 * SMB2_LEASE_NONE in the lease handle
4390 * to cause them to acknowledge the
4391 * lease break. Consulatation with
4392 * Microsoft engineering confirmed
4393 * this approach is safe.
4400 * Ensure we don't grant anything more so we
4403 return NT_STATUS_OPLOCK_NOT_GRANTED;
4407 * Wrapper around open_file_ntcreate and open_directory
4410 static NTSTATUS create_file_unixpath(connection_struct *conn,
4411 struct smb_request *req,
4412 struct smb_filename *smb_fname,
4413 uint32_t access_mask,
4414 uint32_t share_access,
4415 uint32_t create_disposition,
4416 uint32_t create_options,
4417 uint32_t file_attributes,
4418 uint32_t oplock_request,
4419 struct smb2_lease *lease,
4420 uint64_t allocation_size,
4421 uint32_t private_flags,
4422 struct security_descriptor *sd,
4423 struct ea_list *ea_list,
4425 files_struct **result,
4428 int info = FILE_WAS_OPENED;
4429 files_struct *base_fsp = NULL;
4430 files_struct *fsp = NULL;
4433 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
4434 "file_attributes = 0x%x, share_access = 0x%x, "
4435 "create_disposition = 0x%x create_options = 0x%x "
4436 "oplock_request = 0x%x private_flags = 0x%x "
4437 "ea_list = 0x%p, sd = 0x%p, "
4439 (unsigned int)access_mask,
4440 (unsigned int)file_attributes,
4441 (unsigned int)share_access,
4442 (unsigned int)create_disposition,
4443 (unsigned int)create_options,
4444 (unsigned int)oplock_request,
4445 (unsigned int)private_flags,
4446 ea_list, sd, smb_fname_str_dbg(smb_fname)));
4448 if (create_options & FILE_OPEN_BY_FILE_ID) {
4449 status = NT_STATUS_NOT_SUPPORTED;
4453 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
4454 status = NT_STATUS_INVALID_PARAMETER;
4459 oplock_request |= INTERNAL_OPEN_ONLY;
4462 if (lease != NULL) {
4463 uint16_t epoch = lease->lease_epoch;
4464 uint16_t version = lease->lease_version;
4465 status = lease_match(conn,
4472 if (NT_STATUS_EQUAL(status, NT_STATUS_OPLOCK_NOT_GRANTED)) {
4473 /* Dynamic share file. No leases and update epoch... */
4474 lease->lease_state = SMB2_LEASE_NONE;
4475 lease->lease_epoch = epoch;
4476 lease->lease_version = version;
4477 } else if (!NT_STATUS_IS_OK(status)) {
4482 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
4483 && (access_mask & DELETE_ACCESS)
4484 && !is_ntfs_stream_smb_fname(smb_fname)) {
4486 * We can't open a file with DELETE access if any of the
4487 * streams is open without FILE_SHARE_DELETE
4489 status = open_streams_for_delete(conn, smb_fname->base_name);
4491 if (!NT_STATUS_IS_OK(status)) {
4496 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
4497 !security_token_has_privilege(get_current_nttok(conn),
4498 SEC_PRIV_SECURITY)) {
4499 DEBUG(10, ("create_file_unixpath: open on %s "
4500 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
4501 smb_fname_str_dbg(smb_fname)));
4502 status = NT_STATUS_PRIVILEGE_NOT_HELD;
4506 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
4507 && is_ntfs_stream_smb_fname(smb_fname)
4508 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
4509 uint32_t base_create_disposition;
4510 struct smb_filename *smb_fname_base = NULL;
4512 if (create_options & FILE_DIRECTORY_FILE) {
4513 status = NT_STATUS_NOT_A_DIRECTORY;
4517 switch (create_disposition) {
4519 base_create_disposition = FILE_OPEN;
4522 base_create_disposition = FILE_OPEN_IF;
4526 /* Create an smb_filename with stream_name == NULL. */
4527 smb_fname_base = synthetic_smb_fname(talloc_tos(),
4528 smb_fname->base_name,
4530 if (smb_fname_base == NULL) {
4531 status = NT_STATUS_NO_MEMORY;
4535 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
4536 DEBUG(10, ("Unable to stat stream: %s\n",
4537 smb_fname_str_dbg(smb_fname_base)));
4540 * https://bugzilla.samba.org/show_bug.cgi?id=10229
4541 * We need to check if the requested access mask
4542 * could be used to open the underlying file (if
4543 * it existed), as we're passing in zero for the
4544 * access mask to the base filename.
4546 status = check_base_file_access(conn,
4550 if (!NT_STATUS_IS_OK(status)) {
4551 DEBUG(10, ("Permission check "
4552 "for base %s failed: "
4553 "%s\n", smb_fname->base_name,
4554 nt_errstr(status)));
4559 /* Open the base file. */
4560 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
4563 | FILE_SHARE_DELETE,
4564 base_create_disposition,
4565 0, 0, 0, NULL, 0, 0, NULL, NULL,
4567 TALLOC_FREE(smb_fname_base);
4569 if (!NT_STATUS_IS_OK(status)) {
4570 DEBUG(10, ("create_file_unixpath for base %s failed: "
4571 "%s\n", smb_fname->base_name,
4572 nt_errstr(status)));
4575 /* we don't need the low level fd */
4580 * If it's a request for a directory open, deal with it separately.
4583 if (create_options & FILE_DIRECTORY_FILE) {
4585 if (create_options & FILE_NON_DIRECTORY_FILE) {
4586 status = NT_STATUS_INVALID_PARAMETER;
4590 /* Can't open a temp directory. IFS kit test. */
4591 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
4592 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
4593 status = NT_STATUS_INVALID_PARAMETER;
4598 * We will get a create directory here if the Win32
4599 * app specified a security descriptor in the
4600 * CreateDirectory() call.
4604 status = open_directory(
4605 conn, req, smb_fname, access_mask, share_access,
4606 create_disposition, create_options, file_attributes,
4611 * Ordinary file case.
4614 status = file_new(req, conn, &fsp);
4615 if(!NT_STATUS_IS_OK(status)) {
4619 status = fsp_set_smb_fname(fsp, smb_fname);
4620 if (!NT_STATUS_IS_OK(status)) {
4626 * We're opening the stream element of a
4627 * base_fsp we already opened. Set up the
4630 fsp->base_fsp = base_fsp;
4633 if (allocation_size) {
4634 fsp->initial_allocation_size = smb_roundup(fsp->conn,
4638 status = open_file_ntcreate(conn,
4651 if(!NT_STATUS_IS_OK(status)) {
4652 file_free(req, fsp);
4656 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
4658 /* A stream open never opens a directory */
4661 status = NT_STATUS_FILE_IS_A_DIRECTORY;
4666 * Fail the open if it was explicitly a non-directory
4670 if (create_options & FILE_NON_DIRECTORY_FILE) {
4671 status = NT_STATUS_FILE_IS_A_DIRECTORY;
4676 status = open_directory(
4677 conn, req, smb_fname, access_mask,
4678 share_access, create_disposition,
4679 create_options, file_attributes,
4684 if (!NT_STATUS_IS_OK(status)) {
4688 fsp->base_fsp = base_fsp;
4690 if ((ea_list != NULL) &&
4691 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
4692 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
4693 if (!NT_STATUS_IS_OK(status)) {
4698 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
4699 status = NT_STATUS_ACCESS_DENIED;
4703 /* Save the requested allocation size. */
4704 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
4706 && (allocation_size > fsp->fsp_name->st.st_ex_size)) {
4707 fsp->initial_allocation_size = smb_roundup(
4708 fsp->conn, allocation_size);
4709 if (fsp->is_directory) {
4710 /* Can't set allocation size on a directory. */
4711 status = NT_STATUS_ACCESS_DENIED;
4714 if (vfs_allocate_file_space(
4715 fsp, fsp->initial_allocation_size) == -1) {
4716 status = NT_STATUS_DISK_FULL;
4720 fsp->initial_allocation_size = smb_roundup(
4721 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
4724 fsp->initial_allocation_size = 0;
4727 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
4728 fsp->base_fsp == NULL) {
4731 * According to the MS documentation, the only time the security
4732 * descriptor is applied to the opened file is iff we *created* the
4733 * file; an existing file stays the same.
4735 * Also, it seems (from observation) that you can open the file with
4736 * any access mask but you can still write the sd. We need to override
4737 * the granted access before we call set_sd
4738 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
4741 uint32_t sec_info_sent;
4742 uint32_t saved_access_mask = fsp->access_mask;
4744 sec_info_sent = get_sec_info(sd);
4746 fsp->access_mask = FILE_GENERIC_ALL;
4748 if (sec_info_sent & (SECINFO_OWNER|
4752 status = set_sd(fsp, sd, sec_info_sent);
4755 fsp->access_mask = saved_access_mask;
4757 if (!NT_STATUS_IS_OK(status)) {
4760 } else if (lp_inherit_acls(SNUM(conn))) {
4761 /* Inherit from parent. Errors here are not fatal. */
4762 status = inherit_new_acl(fsp);
4763 if (!NT_STATUS_IS_OK(status)) {
4764 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
4766 nt_errstr(status) ));
4771 if ((conn->fs_capabilities & FILE_FILE_COMPRESSION)
4772 && (create_options & FILE_NO_COMPRESSION)
4773 && (info == FILE_WAS_CREATED)) {
4774 status = SMB_VFS_SET_COMPRESSION(conn, fsp, fsp,
4775 COMPRESSION_FORMAT_NONE);
4776 if (!NT_STATUS_IS_OK(status)) {
4777 DEBUG(1, ("failed to disable compression: %s\n",
4778 nt_errstr(status)));
4782 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
4785 if (pinfo != NULL) {
4789 smb_fname->st = fsp->fsp_name->st;
4791 return NT_STATUS_OK;
4794 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
4797 if (base_fsp && fsp->base_fsp == base_fsp) {
4799 * The close_file below will close
4804 close_file(req, fsp, ERROR_CLOSE);
4807 if (base_fsp != NULL) {
4808 close_file(req, base_fsp, ERROR_CLOSE);
4815 * Calculate the full path name given a relative fid.
4817 NTSTATUS get_relative_fid_filename(connection_struct *conn,
4818 struct smb_request *req,
4819 uint16_t root_dir_fid,
4820 const struct smb_filename *smb_fname,
4821 struct smb_filename **smb_fname_out)
4823 files_struct *dir_fsp;
4824 char *parent_fname = NULL;
4825 char *new_base_name = NULL;
4828 if (root_dir_fid == 0 || !smb_fname) {
4829 status = NT_STATUS_INTERNAL_ERROR;
4833 dir_fsp = file_fsp(req, root_dir_fid);
4835 if (dir_fsp == NULL) {
4836 status = NT_STATUS_INVALID_HANDLE;
4840 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
4841 status = NT_STATUS_INVALID_HANDLE;
4845 if (!dir_fsp->is_directory) {
4848 * Check to see if this is a mac fork of some kind.
4851 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
4852 is_ntfs_stream_smb_fname(smb_fname)) {
4853 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
4858 we need to handle the case when we get a
4859 relative open relative to a file and the
4860 pathname is blank - this is a reopen!
4861 (hint from demyn plantenberg)
4864 status = NT_STATUS_INVALID_HANDLE;
4868 if (ISDOT(dir_fsp->fsp_name->base_name)) {
4870 * We're at the toplevel dir, the final file name
4871 * must not contain ./, as this is filtered out
4872 * normally by srvstr_get_path and unix_convert
4873 * explicitly rejects paths containing ./.
4875 parent_fname = talloc_strdup(talloc_tos(), "");
4876 if (parent_fname == NULL) {
4877 status = NT_STATUS_NO_MEMORY;
4881 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
4884 * Copy in the base directory name.
4887 parent_fname = talloc_array(talloc_tos(), char,
4889 if (parent_fname == NULL) {
4890 status = NT_STATUS_NO_MEMORY;
4893 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
4897 * Ensure it ends in a '/'.
4898 * We used TALLOC_SIZE +2 to add space for the '/'.
4902 && (parent_fname[dir_name_len-1] != '\\')
4903 && (parent_fname[dir_name_len-1] != '/')) {
4904 parent_fname[dir_name_len] = '/';
4905 parent_fname[dir_name_len+1] = '\0';
4909 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
4910 smb_fname->base_name);
4911 if (new_base_name == NULL) {
4912 status = NT_STATUS_NO_MEMORY;
4916 status = filename_convert(req,
4918 req->flags2 & FLAGS2_DFS_PATHNAMES,
4923 if (!NT_STATUS_IS_OK(status)) {
4928 TALLOC_FREE(parent_fname);
4929 TALLOC_FREE(new_base_name);
4933 NTSTATUS create_file_default(connection_struct *conn,
4934 struct smb_request *req,
4935 uint16_t root_dir_fid,
4936 struct smb_filename *smb_fname,
4937 uint32_t access_mask,
4938 uint32_t share_access,
4939 uint32_t create_disposition,
4940 uint32_t create_options,
4941 uint32_t file_attributes,
4942 uint32_t oplock_request,
4943 struct smb2_lease *lease,
4944 uint64_t allocation_size,
4945 uint32_t private_flags,
4946 struct security_descriptor *sd,
4947 struct ea_list *ea_list,
4948 files_struct **result,
4950 const struct smb2_create_blobs *in_context_blobs,
4951 struct smb2_create_blobs *out_context_blobs)
4953 int info = FILE_WAS_OPENED;
4954 files_struct *fsp = NULL;
4956 bool stream_name = false;
4958 DEBUG(10,("create_file: access_mask = 0x%x "
4959 "file_attributes = 0x%x, share_access = 0x%x, "
4960 "create_disposition = 0x%x create_options = 0x%x "
4961 "oplock_request = 0x%x "
4962 "private_flags = 0x%x "
4963 "root_dir_fid = 0x%x, ea_list = 0x%p, sd = 0x%p, "
4965 (unsigned int)access_mask,
4966 (unsigned int)file_attributes,
4967 (unsigned int)share_access,
4968 (unsigned int)create_disposition,
4969 (unsigned int)create_options,
4970 (unsigned int)oplock_request,
4971 (unsigned int)private_flags,
4972 (unsigned int)root_dir_fid,
4973 ea_list, sd, smb_fname_str_dbg(smb_fname)));
4976 * Calculate the filename from the root_dir_if if necessary.
4979 if (root_dir_fid != 0) {
4980 struct smb_filename *smb_fname_out = NULL;
4981 status = get_relative_fid_filename(conn, req, root_dir_fid,
4982 smb_fname, &smb_fname_out);
4983 if (!NT_STATUS_IS_OK(status)) {
4986 smb_fname = smb_fname_out;
4990 * Check to see if this is a mac fork of some kind.
4993 stream_name = is_ntfs_stream_smb_fname(smb_fname);
4995 enum FAKE_FILE_TYPE fake_file_type;
4997 fake_file_type = is_fake_file(smb_fname);
4999 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
5002 * Here we go! support for changing the disk quotas
5005 * We need to fake up to open this MAGIC QUOTA file
5006 * and return a valid FID.
5008 * w2k close this file directly after openening xp
5009 * also tries a QUERY_FILE_INFO on the file and then
5012 status = open_fake_file(req, conn, req->vuid,
5013 fake_file_type, smb_fname,
5015 if (!NT_STATUS_IS_OK(status)) {
5019 ZERO_STRUCT(smb_fname->st);
5023 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
5024 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
5029 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
5031 smb_fname->stream_name = NULL;
5032 /* We have to handle this error here. */
5033 if (create_options & FILE_DIRECTORY_FILE) {
5034 status = NT_STATUS_NOT_A_DIRECTORY;
5037 if (lp_posix_pathnames()) {
5038 ret = SMB_VFS_LSTAT(conn, smb_fname);
5040 ret = SMB_VFS_STAT(conn, smb_fname);
5043 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
5044 status = NT_STATUS_FILE_IS_A_DIRECTORY;
5049 status = create_file_unixpath(
5050 conn, req, smb_fname, access_mask, share_access,
5051 create_disposition, create_options, file_attributes,
5052 oplock_request, lease, allocation_size, private_flags,
5056 if (!NT_STATUS_IS_OK(status)) {
5061 DEBUG(10, ("create_file: info=%d\n", info));
5064 if (pinfo != NULL) {
5067 return NT_STATUS_OK;
5070 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
5073 close_file(req, fsp, ERROR_CLOSE);