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
7 Copyright (C) Ralph Boehme 2017
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 #include "system/filesys.h"
25 #include "lib/util/server_id.h"
27 #include "smbd/smbd.h"
28 #include "smbd/globals.h"
29 #include "fake_file.h"
30 #include "../libcli/security/security.h"
31 #include "../librpc/gen_ndr/ndr_security.h"
32 #include "../librpc/gen_ndr/open_files.h"
33 #include "../librpc/gen_ndr/idmap.h"
34 #include "../librpc/gen_ndr/ioctl.h"
35 #include "passdb/lookup_sid.h"
39 #include "source3/lib/dbwrap/dbwrap_watch.h"
40 #include "locking/leases_db.h"
41 #include "librpc/gen_ndr/ndr_leases_db.h"
43 extern const struct generic_mapping file_generic_mapping;
45 struct deferred_open_record {
46 bool delayed_for_oplocks;
51 * Timer for async opens, needed because they don't use a watch on
52 * a locking.tdb record. This is currently only used for real async
53 * opens and just terminates smbd if the async open times out.
55 struct tevent_timer *te;
58 /****************************************************************************
59 If the requester wanted DELETE_ACCESS and was rejected because
60 the file ACL didn't include DELETE_ACCESS, see if the parent ACL
62 ****************************************************************************/
64 static bool parent_override_delete(connection_struct *conn,
65 const struct smb_filename *smb_fname,
67 uint32_t rejected_mask)
69 if ((access_mask & DELETE_ACCESS) &&
70 (rejected_mask & DELETE_ACCESS) &&
71 can_delete_file_in_directory(conn, smb_fname)) {
77 /****************************************************************************
78 Check if we have open rights.
79 ****************************************************************************/
81 NTSTATUS smbd_check_access_rights(struct connection_struct *conn,
82 const struct smb_filename *smb_fname,
86 /* Check if we have rights to open. */
88 struct security_descriptor *sd = NULL;
89 uint32_t rejected_share_access;
90 uint32_t rejected_mask = access_mask;
91 uint32_t do_not_check_mask = 0;
93 rejected_share_access = access_mask & ~(conn->share_access);
95 if (rejected_share_access) {
96 DEBUG(10, ("smbd_check_access_rights: rejected share access 0x%x "
98 (unsigned int)access_mask,
99 smb_fname_str_dbg(smb_fname),
100 (unsigned int)rejected_share_access ));
101 return NT_STATUS_ACCESS_DENIED;
104 if (!use_privs && get_current_uid(conn) == (uid_t)0) {
105 /* I'm sorry sir, I didn't know you were root... */
106 DEBUG(10,("smbd_check_access_rights: root override "
107 "on %s. Granting 0x%x\n",
108 smb_fname_str_dbg(smb_fname),
109 (unsigned int)access_mask ));
113 if ((access_mask & DELETE_ACCESS) && !lp_acl_check_permissions(SNUM(conn))) {
114 DEBUG(10,("smbd_check_access_rights: not checking ACL "
115 "on DELETE_ACCESS on file %s. Granting 0x%x\n",
116 smb_fname_str_dbg(smb_fname),
117 (unsigned int)access_mask ));
121 if (access_mask == DELETE_ACCESS &&
122 VALID_STAT(smb_fname->st) &&
123 S_ISLNK(smb_fname->st.st_ex_mode)) {
124 /* We can always delete a symlink. */
125 DEBUG(10,("smbd_check_access_rights: not checking ACL "
126 "on DELETE_ACCESS on symlink %s.\n",
127 smb_fname_str_dbg(smb_fname) ));
131 status = SMB_VFS_GET_NT_ACL(conn, smb_fname,
134 SECINFO_DACL), talloc_tos(), &sd);
136 if (!NT_STATUS_IS_OK(status)) {
137 DEBUG(10, ("smbd_check_access_rights: Could not get acl "
139 smb_fname_str_dbg(smb_fname),
142 if (NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
150 * If we can access the path to this file, by
151 * default we have FILE_READ_ATTRIBUTES from the
152 * containing directory. See the section:
153 * "Algorithm to Check Access to an Existing File"
156 * se_file_access_check() also takes care of
157 * owner WRITE_DAC and READ_CONTROL.
159 do_not_check_mask = FILE_READ_ATTRIBUTES;
162 * Samba 3.6 and earlier granted execute access even
163 * if the ACL did not contain execute rights.
164 * Samba 4.0 is more correct and checks it.
165 * The compatibilty mode allows one to skip this check
166 * to smoothen upgrades.
168 if (lp_acl_allow_execute_always(SNUM(conn))) {
169 do_not_check_mask |= FILE_EXECUTE;
172 status = se_file_access_check(sd,
173 get_current_nttok(conn),
175 (access_mask & ~do_not_check_mask),
178 DEBUG(10,("smbd_check_access_rights: file %s requesting "
179 "0x%x returning 0x%x (%s)\n",
180 smb_fname_str_dbg(smb_fname),
181 (unsigned int)access_mask,
182 (unsigned int)rejected_mask,
183 nt_errstr(status) ));
185 if (!NT_STATUS_IS_OK(status)) {
186 if (DEBUGLEVEL >= 10) {
187 DEBUG(10,("smbd_check_access_rights: acl for %s is:\n",
188 smb_fname_str_dbg(smb_fname) ));
189 NDR_PRINT_DEBUG(security_descriptor, sd);
195 if (NT_STATUS_IS_OK(status) ||
196 !NT_STATUS_EQUAL(status, NT_STATUS_ACCESS_DENIED)) {
200 /* Here we know status == NT_STATUS_ACCESS_DENIED. */
204 if ((access_mask & FILE_WRITE_ATTRIBUTES) &&
205 (rejected_mask & FILE_WRITE_ATTRIBUTES) &&
206 !lp_store_dos_attributes(SNUM(conn)) &&
207 (lp_map_readonly(SNUM(conn)) ||
208 lp_map_archive(SNUM(conn)) ||
209 lp_map_hidden(SNUM(conn)) ||
210 lp_map_system(SNUM(conn)))) {
211 rejected_mask &= ~FILE_WRITE_ATTRIBUTES;
213 DEBUG(10,("smbd_check_access_rights: "
215 "FILE_WRITE_ATTRIBUTES "
217 smb_fname_str_dbg(smb_fname)));
220 if (parent_override_delete(conn,
224 /* Were we trying to do an open
225 * for delete and didn't get DELETE
226 * access (only) ? Check if the
227 * directory allows DELETE_CHILD.
229 * http://blogs.msdn.com/oldnewthing/archive/2004/06/04/148426.aspx
232 rejected_mask &= ~DELETE_ACCESS;
234 DEBUG(10,("smbd_check_access_rights: "
238 smb_fname_str_dbg(smb_fname)));
241 if (rejected_mask != 0) {
242 return NT_STATUS_ACCESS_DENIED;
247 NTSTATUS check_parent_access(struct connection_struct *conn,
248 struct smb_filename *smb_fname,
249 uint32_t access_mask)
252 char *parent_dir = NULL;
253 struct security_descriptor *parent_sd = NULL;
254 uint32_t access_granted = 0;
255 struct smb_filename *parent_smb_fname = NULL;
256 struct share_mode_lock *lck = NULL;
257 struct file_id id = {0};
259 bool delete_on_close_set;
261 TALLOC_CTX *frame = talloc_stackframe();
263 if (!parent_dirname(frame,
264 smb_fname->base_name,
267 status = NT_STATUS_NO_MEMORY;
271 parent_smb_fname = synthetic_smb_fname(frame,
276 if (parent_smb_fname == NULL) {
277 status = NT_STATUS_NO_MEMORY;
281 if (get_current_uid(conn) == (uid_t)0) {
282 /* I'm sorry sir, I didn't know you were root... */
283 DEBUG(10,("check_parent_access: root override "
284 "on %s. Granting 0x%x\n",
285 smb_fname_str_dbg(smb_fname),
286 (unsigned int)access_mask ));
287 status = NT_STATUS_OK;
291 status = SMB_VFS_GET_NT_ACL(conn,
297 if (!NT_STATUS_IS_OK(status)) {
298 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
299 "%s with error %s\n",
306 * If we can access the path to this file, by
307 * default we have FILE_READ_ATTRIBUTES from the
308 * containing directory. See the section:
309 * "Algorithm to Check Access to an Existing File"
312 * se_file_access_check() also takes care of
313 * owner WRITE_DAC and READ_CONTROL.
315 status = se_file_access_check(parent_sd,
316 get_current_nttok(conn),
318 (access_mask & ~FILE_READ_ATTRIBUTES),
320 if(!NT_STATUS_IS_OK(status)) {
321 DEBUG(5,("check_parent_access: access check "
322 "on directory %s for "
323 "path %s for mask 0x%x returned (0x%x) %s\n",
325 smb_fname->base_name,
328 nt_errstr(status) ));
332 if (!(access_mask & (SEC_DIR_ADD_FILE | SEC_DIR_ADD_SUBDIR))) {
333 status = NT_STATUS_OK;
336 if (!lp_check_parent_directory_delete_on_close(SNUM(conn))) {
337 status = NT_STATUS_OK;
341 /* Check if the directory has delete-on-close set */
342 ret = SMB_VFS_STAT(conn, parent_smb_fname);
344 status = map_nt_error_from_unix(errno);
348 id = SMB_VFS_FILE_ID_CREATE(conn, &parent_smb_fname->st);
350 status = file_name_hash(conn, parent_smb_fname->base_name, &name_hash);
351 if (!NT_STATUS_IS_OK(status)) {
355 lck = get_existing_share_mode_lock(frame, id);
357 status = NT_STATUS_OK;
361 delete_on_close_set = is_delete_on_close_set(lck, name_hash);
362 if (delete_on_close_set) {
363 status = NT_STATUS_DELETE_PENDING;
367 status = NT_STATUS_OK;
374 /****************************************************************************
375 Ensure when opening a base file for a stream open that we have permissions
376 to do so given the access mask on the base file.
377 ****************************************************************************/
379 static NTSTATUS check_base_file_access(struct connection_struct *conn,
380 struct smb_filename *smb_fname,
381 uint32_t access_mask)
385 status = smbd_calculate_access_mask(conn, smb_fname,
389 if (!NT_STATUS_IS_OK(status)) {
390 DEBUG(10, ("smbd_calculate_access_mask "
391 "on file %s returned %s\n",
392 smb_fname_str_dbg(smb_fname),
397 if (access_mask & (FILE_WRITE_DATA|FILE_APPEND_DATA)) {
399 if (!CAN_WRITE(conn)) {
400 return NT_STATUS_ACCESS_DENIED;
402 dosattrs = dos_mode(conn, smb_fname);
403 if (IS_DOS_READONLY(dosattrs)) {
404 return NT_STATUS_ACCESS_DENIED;
408 return smbd_check_access_rights(conn,
414 /****************************************************************************
415 Handle differing symlink errno's
416 ****************************************************************************/
418 static int link_errno_convert(int err)
420 #if defined(ENOTSUP) && defined(OSF1)
421 /* handle special Tru64 errno */
422 if (err == ENOTSUP) {
427 /* fix broken NetBSD errno */
432 /* fix broken FreeBSD errno */
439 static int non_widelink_open(struct connection_struct *conn,
440 const struct smb_filename *conn_rootdir_fname,
442 struct smb_filename *smb_fname,
445 unsigned int link_depth);
447 /****************************************************************************
448 Follow a symlink in userspace.
449 ****************************************************************************/
451 static int process_symlink_open(struct connection_struct *conn,
452 const struct smb_filename *conn_rootdir_fname,
454 struct smb_filename *smb_fname,
457 unsigned int link_depth)
460 char *link_target = NULL;
461 struct smb_filename target_fname = {0};
463 struct smb_filename *oldwd_fname = NULL;
464 size_t rootdir_len = 0;
465 struct smb_filename *resolved_fname = NULL;
466 char *resolved_name = NULL;
467 bool matched = false;
471 * Ensure we don't get stuck in a symlink loop.
474 if (link_depth >= 20) {
479 /* Allocate space for the link target. */
480 link_target = talloc_array(talloc_tos(), char, PATH_MAX);
481 if (link_target == NULL) {
486 /* Read the link target. */
487 link_len = SMB_VFS_READLINK(conn,
491 if (link_len == -1) {
495 /* Ensure it's at least null terminated. */
496 link_target[link_len] = '\0';
497 target_fname = (struct smb_filename){ .base_name = link_target };
499 /* Convert to an absolute path. */
500 resolved_fname = SMB_VFS_REALPATH(conn, talloc_tos(), &target_fname);
501 if (resolved_fname == NULL) {
504 resolved_name = resolved_fname->base_name;
507 * We know conn_rootdir starts with '/' and
508 * does not end in '/'. FIXME ! Should we
511 rootdir_len = strlen(conn_rootdir_fname->base_name);
513 matched = (strncmp(conn_rootdir_fname->base_name,
522 * Turn into a path relative to the share root.
524 if (resolved_name[rootdir_len] == '\0') {
525 /* Link to the root of the share. */
526 TALLOC_FREE(smb_fname->base_name);
527 smb_fname->base_name = talloc_strdup(smb_fname, ".");
528 } else if (resolved_name[rootdir_len] == '/') {
529 TALLOC_FREE(smb_fname->base_name);
530 smb_fname->base_name = talloc_strdup(smb_fname,
531 &resolved_name[rootdir_len+1]);
537 if (smb_fname->base_name == NULL) {
542 oldwd_fname = vfs_GetWd(talloc_tos(), conn);
543 if (oldwd_fname == NULL) {
547 /* Ensure we operate from the root of the share. */
548 if (vfs_ChDir(conn, conn_rootdir_fname) == -1) {
552 /* And do it all again.. */
553 fd = non_widelink_open(conn,
566 TALLOC_FREE(resolved_fname);
567 TALLOC_FREE(link_target);
568 if (oldwd_fname != NULL) {
569 int ret = vfs_ChDir(conn, oldwd_fname);
571 smb_panic("unable to get back to old directory\n");
573 TALLOC_FREE(oldwd_fname);
575 if (saved_errno != 0) {
581 /****************************************************************************
583 ****************************************************************************/
585 static int non_widelink_open(struct connection_struct *conn,
586 const struct smb_filename *conn_rootdir_fname,
588 struct smb_filename *smb_fname,
591 unsigned int link_depth)
595 struct smb_filename *smb_fname_rel = NULL;
597 struct smb_filename *oldwd_fname = NULL;
598 char *parent_dir = NULL;
599 struct smb_filename parent_dir_fname = {0};
600 const char *final_component = NULL;
601 bool is_directory = false;
605 if (flags & O_DIRECTORY) {
611 parent_dir = talloc_strdup(talloc_tos(), smb_fname->base_name);
612 if (parent_dir == NULL) {
617 final_component = ".";
619 ok = parent_dirname(talloc_tos(),
620 smb_fname->base_name,
629 parent_dir_fname = (struct smb_filename) { .base_name = parent_dir };
631 oldwd_fname = vfs_GetWd(talloc_tos(), conn);
632 if (oldwd_fname == NULL) {
636 /* Pin parent directory in place. */
637 if (vfs_ChDir(conn, &parent_dir_fname) == -1) {
641 smb_fname_rel = synthetic_smb_fname(talloc_tos(),
643 smb_fname->stream_name,
646 if (smb_fname_rel == NULL) {
647 saved_errno = ENOMEM;
651 /* Ensure the relative path is below the share. */
652 status = check_reduced_name(conn, &parent_dir_fname, smb_fname_rel);
653 if (!NT_STATUS_IS_OK(status)) {
654 saved_errno = map_errno_from_nt_status(status);
661 struct smb_filename *tmp_name = fsp->fsp_name;
662 fsp->fsp_name = smb_fname_rel;
663 fd = SMB_VFS_OPEN(conn, smb_fname_rel, fsp, flags, mode);
664 fsp->fsp_name = tmp_name;
668 saved_errno = link_errno_convert(errno);
670 * Trying to open a symlink to a directory with O_NOFOLLOW and
671 * O_DIRECTORY can return either of ELOOP and ENOTDIR. So
672 * ENOTDIR really means: might be a symlink, but we're not sure.
673 * In this case, we just assume there's a symlink. If we were
674 * wrong, process_symlink_open() will return EINVAL. We check
675 * this below, and fall back to returning the initial
678 * BUG: https://bugzilla.samba.org/show_bug.cgi?id=12860
680 if (saved_errno == ELOOP || saved_errno == ENOTDIR) {
681 if (fsp->posix_flags & FSP_POSIX_FLAGS_OPEN) {
682 /* Never follow symlinks on posix open. */
685 if (!lp_follow_symlinks(SNUM(conn))) {
686 /* Explicitly no symlinks. */
690 * We may have a symlink. Follow in userspace
691 * to ensure it's under the share definition.
693 fd = process_symlink_open(conn,
701 if (saved_errno == ENOTDIR &&
704 * O_DIRECTORY on neither a directory,
705 * nor a symlink. Just return
706 * saved_errno from initial open()
711 link_errno_convert(errno);
718 TALLOC_FREE(parent_dir);
719 TALLOC_FREE(smb_fname_rel);
721 if (oldwd_fname != NULL) {
722 int ret = vfs_ChDir(conn, oldwd_fname);
724 smb_panic("unable to get back to old directory\n");
726 TALLOC_FREE(oldwd_fname);
728 if (saved_errno != 0) {
734 /****************************************************************************
735 fd support routines - attempt to do a dos_open.
736 ****************************************************************************/
738 NTSTATUS fd_open(struct connection_struct *conn,
743 struct smb_filename *smb_fname = fsp->fsp_name;
744 NTSTATUS status = NT_STATUS_OK;
747 * Never follow symlinks on a POSIX client. The
748 * client should be doing this.
751 if ((fsp->posix_flags & FSP_POSIX_FLAGS_OPEN) || !lp_follow_symlinks(SNUM(conn))) {
755 /* Ensure path is below share definition. */
756 if (!lp_widelinks(SNUM(conn))) {
757 struct smb_filename *conn_rootdir_fname = NULL;
758 const char *conn_rootdir = SMB_VFS_CONNECTPATH(conn,
762 if (conn_rootdir == NULL) {
763 return NT_STATUS_NO_MEMORY;
765 conn_rootdir_fname = synthetic_smb_fname(talloc_tos(),
770 if (conn_rootdir_fname == NULL) {
771 return NT_STATUS_NO_MEMORY;
775 * Only follow symlinks within a share
778 fsp->fh->fd = non_widelink_open(conn,
785 if (fsp->fh->fd == -1) {
788 TALLOC_FREE(conn_rootdir_fname);
789 if (saved_errno != 0) {
793 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
796 if (fsp->fh->fd == -1) {
797 int posix_errno = link_errno_convert(errno);
798 status = map_nt_error_from_unix(posix_errno);
799 if (errno == EMFILE) {
800 static time_t last_warned = 0L;
802 if (time((time_t *) NULL) > last_warned) {
803 DEBUG(0,("Too many open files, unable "
804 "to open more! smbd's max "
806 lp_max_open_files()));
807 last_warned = time((time_t *) NULL);
813 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
814 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
815 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
820 /****************************************************************************
821 Close the file associated with a fsp.
822 ****************************************************************************/
824 NTSTATUS fd_close(files_struct *fsp)
831 if (fsp->fh->fd == -1) {
832 return NT_STATUS_OK; /* What we used to call a stat open. */
834 if (fsp->fh->ref_count > 1) {
835 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
838 ret = SMB_VFS_CLOSE(fsp);
841 return map_nt_error_from_unix(errno);
846 /****************************************************************************
847 Change the ownership of a file to that of the parent directory.
848 Do this by fd if possible.
849 ****************************************************************************/
851 void change_file_owner_to_parent(connection_struct *conn,
852 const char *inherit_from_dir,
855 struct smb_filename *smb_fname_parent;
858 smb_fname_parent = synthetic_smb_fname(talloc_tos(),
863 if (smb_fname_parent == NULL) {
867 ret = SMB_VFS_STAT(conn, smb_fname_parent);
869 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
870 "directory %s. Error was %s\n",
871 smb_fname_str_dbg(smb_fname_parent),
873 TALLOC_FREE(smb_fname_parent);
877 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
878 /* Already this uid - no need to change. */
879 DEBUG(10,("change_file_owner_to_parent: file %s "
880 "is already owned by uid %d\n",
882 (int)fsp->fsp_name->st.st_ex_uid ));
883 TALLOC_FREE(smb_fname_parent);
888 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
891 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
892 "file %s to parent directory uid %u. Error "
893 "was %s\n", fsp_str_dbg(fsp),
894 (unsigned int)smb_fname_parent->st.st_ex_uid,
897 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
898 "parent directory uid %u.\n", fsp_str_dbg(fsp),
899 (unsigned int)smb_fname_parent->st.st_ex_uid));
900 /* Ensure the uid entry is updated. */
901 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
904 TALLOC_FREE(smb_fname_parent);
907 static NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
908 const char *inherit_from_dir,
909 struct smb_filename *smb_dname,
910 SMB_STRUCT_STAT *psbuf)
912 struct smb_filename *smb_fname_parent;
913 struct smb_filename *smb_fname_cwd = NULL;
914 struct smb_filename *saved_dir_fname = NULL;
915 TALLOC_CTX *ctx = talloc_tos();
916 NTSTATUS status = NT_STATUS_OK;
919 smb_fname_parent = synthetic_smb_fname(ctx,
924 if (smb_fname_parent == NULL) {
925 return NT_STATUS_NO_MEMORY;
928 ret = SMB_VFS_STAT(conn, smb_fname_parent);
930 status = map_nt_error_from_unix(errno);
931 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
932 "directory %s. Error was %s\n",
933 smb_fname_str_dbg(smb_fname_parent),
938 /* We've already done an lstat into psbuf, and we know it's a
939 directory. If we can cd into the directory and the dev/ino
940 are the same then we can safely chown without races as
941 we're locking the directory in place by being in it. This
942 should work on any UNIX (thanks tridge :-). JRA.
945 saved_dir_fname = vfs_GetWd(ctx,conn);
946 if (!saved_dir_fname) {
947 status = map_nt_error_from_unix(errno);
948 DEBUG(0,("change_dir_owner_to_parent: failed to get "
949 "current working directory. Error was %s\n",
954 /* Chdir into the new path. */
955 if (vfs_ChDir(conn, smb_dname) == -1) {
956 status = map_nt_error_from_unix(errno);
957 DEBUG(0,("change_dir_owner_to_parent: failed to change "
958 "current working directory to %s. Error "
959 "was %s\n", smb_dname->base_name, strerror(errno) ));
963 smb_fname_cwd = synthetic_smb_fname(ctx, ".", NULL, NULL, 0);
964 if (smb_fname_cwd == NULL) {
965 status = NT_STATUS_NO_MEMORY;
969 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
971 status = map_nt_error_from_unix(errno);
972 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
973 "directory '.' (%s) Error was %s\n",
974 smb_dname->base_name, strerror(errno)));
978 /* Ensure we're pointing at the same place. */
979 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
980 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
981 DEBUG(0,("change_dir_owner_to_parent: "
982 "device/inode on directory %s changed. "
983 "Refusing to chown !\n",
984 smb_dname->base_name ));
985 status = NT_STATUS_ACCESS_DENIED;
989 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
990 /* Already this uid - no need to change. */
991 DEBUG(10,("change_dir_owner_to_parent: directory %s "
992 "is already owned by uid %d\n",
993 smb_dname->base_name,
994 (int)smb_fname_cwd->st.st_ex_uid ));
995 status = NT_STATUS_OK;
1000 ret = SMB_VFS_LCHOWN(conn,
1002 smb_fname_parent->st.st_ex_uid,
1006 status = map_nt_error_from_unix(errno);
1007 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
1008 "directory %s to parent directory uid %u. "
1010 smb_dname->base_name,
1011 (unsigned int)smb_fname_parent->st.st_ex_uid,
1014 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
1015 "directory %s to parent directory uid %u.\n",
1016 smb_dname->base_name,
1017 (unsigned int)smb_fname_parent->st.st_ex_uid ));
1018 /* Ensure the uid entry is updated. */
1019 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
1023 vfs_ChDir(conn, saved_dir_fname);
1025 TALLOC_FREE(saved_dir_fname);
1026 TALLOC_FREE(smb_fname_parent);
1027 TALLOC_FREE(smb_fname_cwd);
1031 /****************************************************************************
1032 Open a file - returning a guaranteed ATOMIC indication of if the
1033 file was created or not.
1034 ****************************************************************************/
1036 static NTSTATUS fd_open_atomic(struct connection_struct *conn,
1042 NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
1043 NTSTATUS retry_status;
1044 bool file_existed = VALID_STAT(fsp->fsp_name->st);
1047 *file_created = false;
1049 if (!(flags & O_CREAT)) {
1051 * We're not creating the file, just pass through.
1053 return fd_open(conn, fsp, flags, mode);
1056 if (flags & O_EXCL) {
1058 * Fail if already exists, just pass through.
1060 status = fd_open(conn, fsp, flags, mode);
1063 * Here we've opened with O_CREAT|O_EXCL. If that went
1064 * NT_STATUS_OK, we *know* we created this file.
1066 *file_created = NT_STATUS_IS_OK(status);
1072 * Now it gets tricky. We have O_CREAT, but not O_EXCL.
1073 * To know absolutely if we created the file or not,
1074 * we can never call O_CREAT without O_EXCL. So if
1075 * we think the file existed, try without O_CREAT|O_EXCL.
1076 * If we think the file didn't exist, try with
1079 * The big problem here is dangling symlinks. Opening
1080 * without O_NOFOLLOW means both bad symlink
1081 * and missing path return -1, ENOENT from open(). As POSIX
1082 * is pathname based it's not possible to tell
1083 * the difference between these two cases in a
1084 * non-racy way, so change to try only two attempts before
1087 * We don't have this problem for the O_NOFOLLOW
1088 * case as it just returns NT_STATUS_OBJECT_PATH_NOT_FOUND
1089 * mapped from the ELOOP POSIX error.
1095 curr_flags &= ~(O_CREAT);
1096 retry_status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
1098 curr_flags |= O_EXCL;
1099 retry_status = NT_STATUS_OBJECT_NAME_COLLISION;
1102 status = fd_open(conn, fsp, curr_flags, mode);
1103 if (NT_STATUS_IS_OK(status)) {
1104 if (!file_existed) {
1105 *file_created = true;
1107 return NT_STATUS_OK;
1109 if (!NT_STATUS_EQUAL(status, retry_status)) {
1116 * Keep file_existed up to date for clarity.
1118 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1119 file_existed = false;
1120 curr_flags |= O_EXCL;
1121 DBG_DEBUG("file %s did not exist. Retry.\n",
1122 smb_fname_str_dbg(fsp->fsp_name));
1124 file_existed = true;
1125 curr_flags &= ~(O_CREAT);
1126 DBG_DEBUG("file %s existed. Retry.\n",
1127 smb_fname_str_dbg(fsp->fsp_name));
1130 status = fd_open(conn, fsp, curr_flags, mode);
1132 if (NT_STATUS_IS_OK(status) && (!file_existed)) {
1133 *file_created = true;
1139 /****************************************************************************
1141 ****************************************************************************/
1143 static NTSTATUS open_file(files_struct *fsp,
1144 connection_struct *conn,
1145 struct smb_request *req,
1146 const char *parent_dir,
1149 uint32_t access_mask, /* client requested access mask. */
1150 uint32_t open_access_mask, /* what we're actually using in the open. */
1151 bool *p_file_created)
1153 struct smb_filename *smb_fname = fsp->fsp_name;
1154 NTSTATUS status = NT_STATUS_OK;
1155 int accmode = (flags & O_ACCMODE);
1156 int local_flags = flags;
1157 bool file_existed = VALID_STAT(fsp->fsp_name->st);
1162 /* Check permissions */
1165 * This code was changed after seeing a client open request
1166 * containing the open mode of (DENY_WRITE/read-only) with
1167 * the 'create if not exist' bit set. The previous code
1168 * would fail to open the file read only on a read-only share
1169 * as it was checking the flags parameter directly against O_RDONLY,
1170 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
1174 if (!CAN_WRITE(conn)) {
1175 /* It's a read-only share - fail if we wanted to write. */
1176 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
1177 DEBUG(3,("Permission denied opening %s\n",
1178 smb_fname_str_dbg(smb_fname)));
1179 return NT_STATUS_ACCESS_DENIED;
1181 if (flags & O_CREAT) {
1182 /* We don't want to write - but we must make sure that
1183 O_CREAT doesn't create the file if we have write
1184 access into the directory.
1186 flags &= ~(O_CREAT|O_EXCL);
1187 local_flags &= ~(O_CREAT|O_EXCL);
1192 * This little piece of insanity is inspired by the
1193 * fact that an NT client can open a file for O_RDONLY,
1194 * but set the create disposition to FILE_EXISTS_TRUNCATE.
1195 * If the client *can* write to the file, then it expects to
1196 * truncate the file, even though it is opening for readonly.
1197 * Quicken uses this stupid trick in backup file creation...
1198 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
1199 * for helping track this one down. It didn't bite us in 2.0.x
1200 * as we always opened files read-write in that release. JRA.
1203 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
1204 DEBUG(10,("open_file: truncate requested on read-only open "
1205 "for file %s\n", smb_fname_str_dbg(smb_fname)));
1206 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
1209 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
1210 (!file_existed && (local_flags & O_CREAT)) ||
1211 ((local_flags & O_TRUNC) == O_TRUNC) ) {
1215 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
1217 * We would block on opening a FIFO with no one else on the
1218 * other end. Do what we used to do and add O_NONBLOCK to the
1222 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
1223 local_flags &= ~O_TRUNC; /* Can't truncate a FIFO. */
1224 local_flags |= O_NONBLOCK;
1228 /* Don't create files with Microsoft wildcard characters. */
1229 if (fsp->base_fsp) {
1231 * wildcard characters are allowed in stream names
1232 * only test the basefilename
1234 wild = fsp->base_fsp->fsp_name->base_name;
1236 wild = smb_fname->base_name;
1238 if ((local_flags & O_CREAT) && !file_existed &&
1239 !(fsp->posix_flags & FSP_POSIX_FLAGS_PATHNAMES) &&
1240 ms_has_wild(wild)) {
1241 return NT_STATUS_OBJECT_NAME_INVALID;
1244 /* Can we access this file ? */
1245 if (!fsp->base_fsp) {
1246 /* Only do this check on non-stream open. */
1248 status = smbd_check_access_rights(conn,
1253 if (!NT_STATUS_IS_OK(status)) {
1254 DEBUG(10, ("open_file: "
1255 "smbd_check_access_rights "
1256 "on file %s returned %s\n",
1257 smb_fname_str_dbg(smb_fname),
1258 nt_errstr(status)));
1261 if (!NT_STATUS_IS_OK(status) &&
1262 !NT_STATUS_EQUAL(status,
1263 NT_STATUS_OBJECT_NAME_NOT_FOUND))
1268 if (NT_STATUS_EQUAL(status,
1269 NT_STATUS_OBJECT_NAME_NOT_FOUND))
1271 DEBUG(10, ("open_file: "
1272 "file %s vanished since we "
1273 "checked for existence.\n",
1274 smb_fname_str_dbg(smb_fname)));
1275 file_existed = false;
1276 SET_STAT_INVALID(fsp->fsp_name->st);
1280 if (!file_existed) {
1281 if (!(local_flags & O_CREAT)) {
1282 /* File didn't exist and no O_CREAT. */
1283 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1286 status = check_parent_access(conn,
1289 if (!NT_STATUS_IS_OK(status)) {
1290 DEBUG(10, ("open_file: "
1291 "check_parent_access on "
1292 "file %s returned %s\n",
1293 smb_fname_str_dbg(smb_fname),
1294 nt_errstr(status) ));
1301 * Actually do the open - if O_TRUNC is needed handle it
1302 * below under the share mode lock.
1304 status = fd_open_atomic(conn, fsp, local_flags & ~O_TRUNC,
1305 unx_mode, p_file_created);
1306 if (!NT_STATUS_IS_OK(status)) {
1307 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
1308 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
1309 nt_errstr(status),local_flags,flags));
1313 if (local_flags & O_NONBLOCK) {
1315 * GPFS can return ETIMEDOUT for pread on
1316 * nonblocking file descriptors when files
1317 * migrated to tape need to be recalled. I
1318 * could imagine this happens elsehwere
1319 * too. With blocking file descriptors this
1322 ret = set_blocking(fsp->fh->fd, true);
1324 status = map_nt_error_from_unix(errno);
1325 DBG_WARNING("Could not set fd to blocking: "
1326 "%s\n", strerror(errno));
1332 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
1334 /* If we have an fd, this stat should succeed. */
1335 DEBUG(0,("Error doing fstat on open file %s "
1337 smb_fname_str_dbg(smb_fname),
1339 status = map_nt_error_from_unix(errno);
1344 if (*p_file_created) {
1345 /* We created this file. */
1347 bool need_re_stat = false;
1348 /* Do all inheritance work after we've
1349 done a successful fstat call and filled
1350 in the stat struct in fsp->fsp_name. */
1352 /* Inherit the ACL if required */
1353 if (lp_inherit_permissions(SNUM(conn))) {
1354 inherit_access_posix_acl(conn, parent_dir,
1357 need_re_stat = true;
1360 /* Change the owner if required. */
1361 if (lp_inherit_owner(SNUM(conn)) != INHERIT_OWNER_NO) {
1362 change_file_owner_to_parent(conn, parent_dir,
1364 need_re_stat = true;
1368 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
1369 /* If we have an fd, this stat should succeed. */
1371 DEBUG(0,("Error doing fstat on open file %s "
1373 smb_fname_str_dbg(smb_fname),
1378 notify_fname(conn, NOTIFY_ACTION_ADDED,
1379 FILE_NOTIFY_CHANGE_FILE_NAME,
1380 smb_fname->base_name);
1383 fsp->fh->fd = -1; /* What we used to call a stat open. */
1384 if (!file_existed) {
1385 /* File must exist for a stat open. */
1386 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1389 status = smbd_check_access_rights(conn,
1394 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
1395 (fsp->posix_flags & FSP_POSIX_FLAGS_OPEN) &&
1396 S_ISLNK(smb_fname->st.st_ex_mode)) {
1397 /* This is a POSIX stat open for delete
1398 * or rename on a symlink that points
1399 * nowhere. Allow. */
1400 DEBUG(10,("open_file: allowing POSIX "
1401 "open on bad symlink %s\n",
1402 smb_fname_str_dbg(smb_fname)));
1403 status = NT_STATUS_OK;
1406 if (!NT_STATUS_IS_OK(status)) {
1407 DEBUG(10,("open_file: "
1408 "smbd_check_access_rights on file "
1410 smb_fname_str_dbg(smb_fname),
1411 nt_errstr(status) ));
1417 * POSIX allows read-only opens of directories. We don't
1418 * want to do this (we use a different code path for this)
1419 * so catch a directory open and return an EISDIR. JRA.
1422 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
1425 return NT_STATUS_FILE_IS_A_DIRECTORY;
1428 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1429 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
1430 fsp->file_pid = req ? req->smbpid : 0;
1431 fsp->can_lock = True;
1432 fsp->can_read = ((access_mask & FILE_READ_DATA) != 0);
1435 ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0);
1436 fsp->print_file = NULL;
1437 fsp->modified = False;
1438 fsp->sent_oplock_break = NO_BREAK_SENT;
1439 fsp->is_directory = False;
1440 if (conn->aio_write_behind_list &&
1441 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
1442 conn->case_sensitive)) {
1443 fsp->aio_write_behind = True;
1446 fsp->wcp = NULL; /* Write cache pointer. */
1448 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
1449 conn->session_info->unix_info->unix_name,
1450 smb_fname_str_dbg(smb_fname),
1451 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
1452 conn->num_files_open));
1455 return NT_STATUS_OK;
1458 /****************************************************************************
1459 Check if we can open a file with a share mode.
1460 Returns True if conflict, False if not.
1461 ****************************************************************************/
1463 static bool share_conflict(struct share_mode_entry *entry,
1464 uint32_t access_mask,
1465 uint32_t share_access)
1467 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
1468 "entry->share_access = 0x%x, "
1469 "entry->private_options = 0x%x\n",
1470 (unsigned int)entry->access_mask,
1471 (unsigned int)entry->share_access,
1472 (unsigned int)entry->private_options));
1474 if (server_id_is_disconnected(&entry->pid)) {
1476 * note: cleanup should have been done by
1477 * delay_for_batch_oplocks()
1482 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
1483 (unsigned int)access_mask, (unsigned int)share_access));
1485 if ((entry->access_mask & (FILE_WRITE_DATA|
1489 DELETE_ACCESS)) == 0) {
1490 DEBUG(10,("share_conflict: No conflict due to "
1491 "entry->access_mask = 0x%x\n",
1492 (unsigned int)entry->access_mask ));
1496 if ((access_mask & (FILE_WRITE_DATA|
1500 DELETE_ACCESS)) == 0) {
1501 DEBUG(10,("share_conflict: No conflict due to "
1502 "access_mask = 0x%x\n",
1503 (unsigned int)access_mask ));
1507 #if 1 /* JRA TEST - Superdebug. */
1508 #define CHECK_MASK(num, am, right, sa, share) \
1509 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
1510 (unsigned int)(num), (unsigned int)(am), \
1511 (unsigned int)(right), (unsigned int)(am)&(right) )); \
1512 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
1513 (unsigned int)(num), (unsigned int)(sa), \
1514 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
1515 if (((am) & (right)) && !((sa) & (share))) { \
1516 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
1517 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
1518 (unsigned int)(share) )); \
1522 #define CHECK_MASK(num, am, right, sa, share) \
1523 if (((am) & (right)) && !((sa) & (share))) { \
1524 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
1525 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
1526 (unsigned int)(share) )); \
1531 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
1532 share_access, FILE_SHARE_WRITE);
1533 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
1534 entry->share_access, FILE_SHARE_WRITE);
1536 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
1537 share_access, FILE_SHARE_READ);
1538 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
1539 entry->share_access, FILE_SHARE_READ);
1541 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
1542 share_access, FILE_SHARE_DELETE);
1543 CHECK_MASK(6, access_mask, DELETE_ACCESS,
1544 entry->share_access, FILE_SHARE_DELETE);
1546 DEBUG(10,("share_conflict: No conflict.\n"));
1550 #if defined(DEVELOPER)
1551 static void validate_my_share_entries(struct smbd_server_connection *sconn,
1552 const struct file_id id,
1554 struct share_mode_entry *share_entry)
1556 struct server_id self = messaging_server_id(sconn->msg_ctx);
1559 if (!serverid_equal(&self, &share_entry->pid)) {
1563 if (share_entry->op_mid == 0) {
1564 /* INTERNAL_OPEN_ONLY */
1568 if (!is_valid_share_mode_entry(share_entry)) {
1572 fsp = file_find_dif(sconn, id, share_entry->share_file_id);
1574 DBG_ERR("PANIC : %s\n",
1575 share_mode_str(talloc_tos(), num, &id,
1577 smb_panic("validate_my_share_entries: Cannot match a "
1578 "share entry with an open file\n");
1581 if (((uint16_t)fsp->oplock_type) != share_entry->op_type) {
1590 DBG_ERR("validate_my_share_entries: PANIC : %s\n",
1591 share_mode_str(talloc_tos(), num, &id,
1593 str = talloc_asprintf(talloc_tos(),
1594 "validate_my_share_entries: "
1595 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
1596 fsp->fsp_name->base_name,
1597 (unsigned int)fsp->oplock_type,
1598 (unsigned int)share_entry->op_type );
1604 bool is_stat_open(uint32_t access_mask)
1606 const uint32_t stat_open_bits =
1607 (SYNCHRONIZE_ACCESS|
1608 FILE_READ_ATTRIBUTES|
1609 FILE_WRITE_ATTRIBUTES);
1611 return (((access_mask & stat_open_bits) != 0) &&
1612 ((access_mask & ~stat_open_bits) == 0));
1615 static bool has_delete_on_close(struct share_mode_lock *lck,
1618 struct share_mode_data *d = lck->data;
1621 if (d->num_share_modes == 0) {
1624 if (!is_delete_on_close_set(lck, name_hash)) {
1627 for (i=0; i<d->num_share_modes; i++) {
1628 if (!share_mode_stale_pid(d, i)) {
1635 /****************************************************************************
1636 Deal with share modes
1637 Invariant: Share mode must be locked on entry and exit.
1638 Returns -1 on error, or number of share modes on success (may be zero).
1639 ****************************************************************************/
1641 static NTSTATUS open_mode_check(connection_struct *conn,
1642 struct share_mode_lock *lck,
1643 uint32_t access_mask,
1644 uint32_t share_access)
1648 if(lck->data->num_share_modes == 0) {
1649 return NT_STATUS_OK;
1652 if (is_stat_open(access_mask)) {
1653 /* Stat open that doesn't trigger oplock breaks or share mode
1654 * checks... ! JRA. */
1655 return NT_STATUS_OK;
1659 * Check if the share modes will give us access.
1662 #if defined(DEVELOPER)
1663 for(i = 0; i < lck->data->num_share_modes; i++) {
1664 validate_my_share_entries(conn->sconn, lck->data->id, i,
1665 &lck->data->share_modes[i]);
1669 /* Now we check the share modes, after any oplock breaks. */
1670 for(i = 0; i < lck->data->num_share_modes; i++) {
1672 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1676 /* someone else has a share lock on it, check to see if we can
1678 if (share_conflict(&lck->data->share_modes[i],
1679 access_mask, share_access)) {
1681 if (share_mode_stale_pid(lck->data, i)) {
1685 return NT_STATUS_SHARING_VIOLATION;
1689 return NT_STATUS_OK;
1693 * Send a break message to the oplock holder and delay the open for
1697 NTSTATUS send_break_message(struct messaging_context *msg_ctx,
1698 const struct file_id *id,
1699 const struct share_mode_entry *exclusive,
1703 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1704 struct server_id_buf tmp;
1706 DEBUG(10, ("Sending break request to PID %s\n",
1707 server_id_str_buf(exclusive->pid, &tmp)));
1709 /* Create the message. */
1710 share_mode_entry_to_message(msg, id, exclusive);
1712 /* Overload entry->op_type */
1714 * This is a cut from uint32_t to uint16_t, but so far only the lower 3
1715 * bits (LEASE_WRITE/HANDLE/READ are used anyway.
1717 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET, break_to);
1719 status = messaging_send_buf(msg_ctx, exclusive->pid,
1720 MSG_SMB_BREAK_REQUEST,
1721 (uint8_t *)msg, sizeof(msg));
1722 if (!NT_STATUS_IS_OK(status)) {
1723 DEBUG(3, ("Could not send oplock break message: %s\n",
1724 nt_errstr(status)));
1731 * Do internal consistency checks on the share mode for a file.
1734 static bool validate_oplock_types(struct share_mode_lock *lck)
1736 struct share_mode_data *d = lck->data;
1738 bool ex_or_batch = false;
1739 bool level2 = false;
1740 bool no_oplock = false;
1741 uint32_t num_non_stat_opens = 0;
1744 for (i=0; i<d->num_share_modes; i++) {
1745 struct share_mode_entry *e = &d->share_modes[i];
1747 if (!is_valid_share_mode_entry(e)) {
1751 if (e->op_mid == 0) {
1752 /* INTERNAL_OPEN_ONLY */
1756 if (e->op_type == NO_OPLOCK && is_stat_open(e->access_mask)) {
1757 /* We ignore stat opens in the table - they
1758 always have NO_OPLOCK and never get or
1759 cause breaks. JRA. */
1763 num_non_stat_opens += 1;
1765 if (BATCH_OPLOCK_TYPE(e->op_type)) {
1766 /* batch - can only be one. */
1767 if (share_mode_stale_pid(d, i)) {
1768 DEBUG(10, ("Found stale batch oplock\n"));
1771 if (ex_or_batch || batch || level2 || no_oplock) {
1772 DEBUG(0, ("Bad batch oplock entry %u.",
1779 if (EXCLUSIVE_OPLOCK_TYPE(e->op_type)) {
1780 if (share_mode_stale_pid(d, i)) {
1781 DEBUG(10, ("Found stale duplicate oplock\n"));
1784 /* Exclusive or batch - can only be one. */
1785 if (ex_or_batch || level2 || no_oplock) {
1786 DEBUG(0, ("Bad exclusive or batch oplock "
1787 "entry %u.", (unsigned)i));
1793 if (LEVEL_II_OPLOCK_TYPE(e->op_type)) {
1794 if (batch || ex_or_batch) {
1795 if (share_mode_stale_pid(d, i)) {
1796 DEBUG(10, ("Found stale LevelII "
1800 DEBUG(0, ("Bad levelII oplock entry %u.",
1807 if (e->op_type == NO_OPLOCK) {
1808 if (batch || ex_or_batch) {
1809 if (share_mode_stale_pid(d, i)) {
1810 DEBUG(10, ("Found stale NO_OPLOCK "
1814 DEBUG(0, ("Bad no oplock entry %u.",
1822 remove_stale_share_mode_entries(d);
1824 if ((batch || ex_or_batch) && (num_non_stat_opens != 1)) {
1825 DEBUG(1, ("got batch (%d) or ex (%d) non-exclusively (%d)\n",
1826 (int)batch, (int)ex_or_batch,
1827 (int)d->num_share_modes));
1834 static bool delay_for_oplock(files_struct *fsp,
1836 const struct smb2_lease *lease,
1837 struct share_mode_lock *lck,
1838 bool have_sharing_violation,
1839 uint32_t create_disposition,
1840 bool first_open_attempt)
1842 struct share_mode_data *d = lck->data;
1845 bool will_overwrite;
1847 if ((oplock_request & INTERNAL_OPEN_ONLY) ||
1848 is_stat_open(fsp->access_mask)) {
1852 switch (create_disposition) {
1853 case FILE_SUPERSEDE:
1854 case FILE_OVERWRITE:
1855 case FILE_OVERWRITE_IF:
1856 will_overwrite = true;
1859 will_overwrite = false;
1863 for (i=0; i<d->num_share_modes; i++) {
1864 struct share_mode_entry *e = &d->share_modes[i];
1865 bool e_is_lease = (e->op_type == LEASE_OPLOCK);
1866 uint32_t e_lease_type = get_lease_type(d, e);
1868 uint32_t delay_mask = 0;
1869 bool lease_is_breaking = false;
1874 status = leases_db_get(
1878 NULL, /* current_state */
1880 NULL, /* breaking_to_requested */
1881 NULL, /* breaking_to_required */
1882 NULL, /* lease_version */
1884 SMB_ASSERT(NT_STATUS_IS_OK(status));
1887 if (have_sharing_violation) {
1888 delay_mask = SMB2_LEASE_HANDLE;
1890 delay_mask = SMB2_LEASE_WRITE;
1893 break_to = e_lease_type & ~delay_mask;
1895 if (will_overwrite) {
1897 * we'll decide about SMB2_LEASE_READ later.
1899 * Maybe the break will be deferred
1901 break_to &= ~SMB2_LEASE_HANDLE;
1904 DEBUG(10, ("entry %u: e_lease_type %u, will_overwrite: %u\n",
1905 (unsigned)i, (unsigned)e_lease_type,
1906 (unsigned)will_overwrite));
1908 if (e_is_lease && lease != NULL) {
1911 ign = smb2_lease_equal(fsp_client_guid(fsp),
1920 if ((e_lease_type & ~break_to) == 0) {
1921 if (lease_is_breaking) {
1927 if (share_mode_stale_pid(d, i)) {
1931 if (will_overwrite) {
1933 * If we break anyway break to NONE directly.
1934 * Otherwise vfs_set_filelen() will trigger the
1937 break_to &= ~(SMB2_LEASE_READ|SMB2_LEASE_WRITE);
1942 * Oplocks only support breaking to R or NONE.
1944 break_to &= ~(SMB2_LEASE_HANDLE|SMB2_LEASE_WRITE);
1947 DEBUG(10, ("breaking from %d to %d\n",
1948 (int)e_lease_type, (int)break_to));
1949 send_break_message(fsp->conn->sconn->msg_ctx, &fsp->file_id,
1951 if (e_lease_type & delay_mask) {
1954 if (lease_is_breaking && !first_open_attempt) {
1963 static bool file_has_brlocks(files_struct *fsp)
1965 struct byte_range_lock *br_lck;
1967 br_lck = brl_get_locks_readonly(fsp);
1971 return (brl_num_locks(br_lck) > 0);
1974 int find_share_mode_lease(struct share_mode_data *d,
1975 const struct GUID *client_guid,
1976 const struct smb2_lease_key *key)
1980 for (i=0; i<d->num_leases; i++) {
1981 struct share_mode_lease *l = &d->leases[i];
1983 if (smb2_lease_equal(client_guid,
1994 NTSTATUS update_share_mode_lease_from_db(
1995 struct share_mode_data *d,
1996 const struct GUID *client_guid,
1997 const struct smb2_lease_key *lease_key)
2000 struct share_mode_lease *l;
2001 uint32_t current_state, breaking_to_requested, breaking_to_required;
2003 uint16_t lease_version, epoch;
2006 idx = find_share_mode_lease(d, client_guid, lease_key);
2008 DBG_WARNING("find_share_mode_lease failed\n");
2009 return NT_STATUS_NOT_FOUND;
2011 l = &d->leases[idx];
2013 status = leases_db_get(client_guid,
2018 &breaking_to_requested,
2019 &breaking_to_required,
2022 if (!NT_STATUS_IS_OK(status)) {
2023 DBG_WARNING("leases_db_get returned %s\n",
2028 if ((l->current_state == current_state) &&
2029 (l->breaking == breaking) &&
2030 (l->breaking_to_requested == breaking_to_requested) &&
2031 (l->breaking_to_required == breaking_to_required) &&
2032 (l->lease_version == lease_version) &&
2033 (l->epoch == epoch)) {
2034 return NT_STATUS_OK;
2037 l->current_state = current_state;
2038 l->breaking = breaking;
2039 l->breaking_to_requested = breaking_to_requested;
2040 l->breaking_to_required = breaking_to_required;
2041 l->lease_version = lease_version;
2046 return NT_STATUS_OK;
2049 struct fsp_lease *find_fsp_lease(struct files_struct *new_fsp,
2050 const struct smb2_lease_key *key,
2051 uint32_t current_state,
2052 uint16_t lease_version,
2053 uint16_t lease_epoch)
2055 struct files_struct *fsp;
2058 * TODO: Measure how expensive this loop is with thousands of open
2062 for (fsp = file_find_di_first(new_fsp->conn->sconn, new_fsp->file_id);
2064 fsp = file_find_di_next(fsp)) {
2066 if (fsp == new_fsp) {
2069 if (fsp->oplock_type != LEASE_OPLOCK) {
2072 if (smb2_lease_key_equal(&fsp->lease->lease.lease_key, key)) {
2073 fsp->lease->ref_count += 1;
2078 /* Not found - must be leased in another smbd. */
2079 new_fsp->lease = talloc_zero(new_fsp->conn->sconn, struct fsp_lease);
2080 if (new_fsp->lease == NULL) {
2083 new_fsp->lease->ref_count = 1;
2084 new_fsp->lease->sconn = new_fsp->conn->sconn;
2085 new_fsp->lease->lease.lease_key = *key;
2086 new_fsp->lease->lease.lease_state = current_state;
2088 * We internally treat all leases as V2 and update
2089 * the epoch, but when sending breaks it matters if
2090 * the requesting lease was v1 or v2.
2092 new_fsp->lease->lease.lease_version = lease_version;
2093 new_fsp->lease->lease.lease_epoch = lease_epoch;
2094 return new_fsp->lease;
2097 static NTSTATUS try_lease_upgrade(struct files_struct *fsp,
2098 struct share_mode_lock *lck,
2099 const struct GUID *client_guid,
2100 const struct smb2_lease *lease,
2103 struct share_mode_data *d = lck->data;
2105 uint32_t current_state, breaking_to_requested, breaking_to_required;
2107 uint16_t lease_version, epoch;
2108 uint32_t existing, requested;
2111 status = leases_db_get(
2117 &breaking_to_requested,
2118 &breaking_to_required,
2121 if (!NT_STATUS_IS_OK(status)) {
2125 fsp->lease = find_fsp_lease(
2131 if (fsp->lease == NULL) {
2132 DEBUG(1, ("Did not find existing lease for file %s\n",
2134 return NT_STATUS_NO_MEMORY;
2138 * Upgrade only if the requested lease is a strict upgrade.
2140 existing = current_state;
2141 requested = lease->lease_state;
2144 * Tricky: This test makes sure that "requested" is a
2145 * strict bitwise superset of "existing".
2147 do_upgrade = ((existing & requested) == existing);
2150 * Upgrade only if there's a change.
2152 do_upgrade &= (granted != existing);
2155 * Upgrade only if other leases don't prevent what was asked
2158 do_upgrade &= (granted == requested);
2161 * only upgrade if we are not in breaking state
2163 do_upgrade &= !breaking;
2165 DEBUG(10, ("existing=%"PRIu32", requested=%"PRIu32", "
2166 "granted=%"PRIu32", do_upgrade=%d\n",
2167 existing, requested, granted, (int)do_upgrade));
2170 NTSTATUS set_status;
2172 current_state = granted;
2175 set_status = leases_db_set(
2180 breaking_to_requested,
2181 breaking_to_required,
2185 if (!NT_STATUS_IS_OK(set_status)) {
2186 DBG_DEBUG("leases_db_set failed: %s\n",
2187 nt_errstr(set_status));
2192 status = update_share_mode_lease_from_db(
2193 d, client_guid, &lease->lease_key);
2194 if (!NT_STATUS_IS_OK(status)) {
2195 DBG_WARNING("update_share_mode_lease_from_db failed: %s\n",
2200 fsp_lease_update(lck, fsp_client_guid(fsp), fsp->lease);
2202 return NT_STATUS_OK;
2205 static NTSTATUS grant_new_fsp_lease(struct files_struct *fsp,
2206 struct share_mode_lock *lck,
2207 const struct GUID *client_guid,
2208 const struct smb2_lease *lease,
2211 struct share_mode_data *d = lck->data;
2212 struct share_mode_lease *tmp;
2215 tmp = talloc_realloc(d, d->leases, struct share_mode_lease,
2221 return NT_STATUS_INSUFFICIENT_RESOURCES;
2225 fsp->lease = talloc_zero(fsp->conn->sconn, struct fsp_lease);
2226 if (fsp->lease == NULL) {
2227 return NT_STATUS_INSUFFICIENT_RESOURCES;
2229 fsp->lease->ref_count = 1;
2230 fsp->lease->sconn = fsp->conn->sconn;
2231 fsp->lease->lease.lease_version = lease->lease_version;
2232 fsp->lease->lease.lease_key = lease->lease_key;
2233 fsp->lease->lease.lease_state = granted;
2234 fsp->lease->lease.lease_epoch = lease->lease_epoch + 1;
2236 d->leases[d->num_leases] = (struct share_mode_lease) {
2237 .client_guid = *client_guid,
2238 .lease_key = fsp->lease->lease.lease_key,
2239 .current_state = fsp->lease->lease.lease_state,
2240 .lease_version = fsp->lease->lease.lease_version,
2241 .epoch = fsp->lease->lease.lease_epoch,
2244 status = leases_db_add(client_guid,
2247 fsp->lease->lease.lease_state,
2248 fsp->lease->lease.lease_version,
2249 fsp->lease->lease.lease_epoch,
2250 fsp->conn->connectpath,
2251 fsp->fsp_name->base_name,
2252 fsp->fsp_name->stream_name);
2253 if (!NT_STATUS_IS_OK(status)) {
2254 DEBUG(10, ("%s: leases_db_add failed: %s\n", __func__,
2255 nt_errstr(status)));
2256 TALLOC_FREE(fsp->lease);
2257 return NT_STATUS_INSUFFICIENT_RESOURCES;
2263 return NT_STATUS_OK;
2266 static NTSTATUS grant_fsp_lease(struct files_struct *fsp,
2267 struct share_mode_lock *lck,
2268 const struct smb2_lease *lease,
2271 const struct GUID *client_guid = fsp_client_guid(fsp);
2274 status = try_lease_upgrade(fsp, lck, client_guid, lease, granted);
2276 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
2277 status = grant_new_fsp_lease(
2278 fsp, lck, client_guid, lease, granted);
2284 static bool is_same_lease(const files_struct *fsp,
2285 const struct share_mode_data *d,
2286 const struct share_mode_entry *e,
2287 const struct smb2_lease *lease)
2289 if (e->op_type != LEASE_OPLOCK) {
2292 if (lease == NULL) {
2296 return smb2_lease_equal(fsp_client_guid(fsp),
2302 static int map_lease_type_to_oplock(uint32_t lease_type)
2304 int result = NO_OPLOCK;
2306 switch (lease_type) {
2307 case SMB2_LEASE_READ|SMB2_LEASE_WRITE|SMB2_LEASE_HANDLE:
2308 result = BATCH_OPLOCK|EXCLUSIVE_OPLOCK;
2310 case SMB2_LEASE_READ|SMB2_LEASE_WRITE:
2311 result = EXCLUSIVE_OPLOCK;
2313 case SMB2_LEASE_READ|SMB2_LEASE_HANDLE:
2314 case SMB2_LEASE_READ:
2315 result = LEVEL_II_OPLOCK;
2322 static NTSTATUS grant_fsp_oplock_type(struct smb_request *req,
2323 struct files_struct *fsp,
2324 struct share_mode_lock *lck,
2326 struct smb2_lease *lease)
2328 struct share_mode_data *d = lck->data;
2329 bool got_handle_lease = false;
2330 bool got_oplock = false;
2333 const struct GUID *client_guid = NULL;
2334 const struct smb2_lease_key *lease_key = NULL;
2338 if (oplock_request & INTERNAL_OPEN_ONLY) {
2339 /* No oplocks on internal open. */
2340 oplock_request = NO_OPLOCK;
2341 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
2342 fsp->oplock_type, fsp_str_dbg(fsp)));
2345 if (oplock_request == LEASE_OPLOCK) {
2346 if (lease == NULL) {
2348 * The SMB2 layer should have checked this
2350 return NT_STATUS_INTERNAL_ERROR;
2353 granted = lease->lease_state;
2355 if (lp_kernel_oplocks(SNUM(fsp->conn))) {
2356 DEBUG(10, ("No lease granted because kernel oplocks are enabled\n"));
2357 granted = SMB2_LEASE_NONE;
2359 if ((granted & (SMB2_LEASE_READ|SMB2_LEASE_WRITE)) == 0) {
2360 DEBUG(10, ("No read or write lease requested\n"));
2361 granted = SMB2_LEASE_NONE;
2363 if (granted == SMB2_LEASE_WRITE) {
2364 DEBUG(10, ("pure write lease requested\n"));
2365 granted = SMB2_LEASE_NONE;
2367 if (granted == (SMB2_LEASE_WRITE|SMB2_LEASE_HANDLE)) {
2368 DEBUG(10, ("write and handle lease requested\n"));
2369 granted = SMB2_LEASE_NONE;
2372 granted = map_oplock_to_lease_type(
2373 oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
2376 if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
2377 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
2379 granted &= ~SMB2_LEASE_READ;
2382 for (i=0; i<d->num_share_modes; i++) {
2383 struct share_mode_entry *e = &d->share_modes[i];
2384 uint32_t e_lease_type;
2386 e_lease_type = get_lease_type(d, e);
2388 if ((granted & SMB2_LEASE_WRITE) &&
2389 !is_same_lease(fsp, d, e, lease) &&
2390 !share_mode_stale_pid(d, i)) {
2392 * Can grant only one writer
2394 granted &= ~SMB2_LEASE_WRITE;
2397 if ((e_lease_type & SMB2_LEASE_HANDLE) && !got_handle_lease &&
2398 !share_mode_stale_pid(d, i)) {
2399 got_handle_lease = true;
2402 if ((e->op_type != LEASE_OPLOCK) && !got_oplock &&
2403 !share_mode_stale_pid(d, i)) {
2408 if ((granted & SMB2_LEASE_READ) && !(granted & SMB2_LEASE_WRITE)) {
2410 (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
2411 lp_level2_oplocks(SNUM(fsp->conn));
2413 if (!allow_level2) {
2414 granted = SMB2_LEASE_NONE;
2418 if (oplock_request == LEASE_OPLOCK) {
2420 granted &= ~SMB2_LEASE_HANDLE;
2423 fsp->oplock_type = LEASE_OPLOCK;
2425 status = grant_fsp_lease(fsp, lck, lease, granted);
2426 if (!NT_STATUS_IS_OK(status)) {
2430 *lease = fsp->lease->lease;
2432 lease_key = &fsp->lease->lease.lease_key;
2433 client_guid = fsp_client_guid(fsp);
2435 DEBUG(10, ("lease_state=%d\n", lease->lease_state));
2437 if (got_handle_lease) {
2438 granted = SMB2_LEASE_NONE;
2441 fsp->oplock_type = map_lease_type_to_oplock(granted);
2443 status = set_file_oplock(fsp);
2444 if (!NT_STATUS_IS_OK(status)) {
2446 * Could not get the kernel oplock
2448 fsp->oplock_type = NO_OPLOCK;
2452 ok = set_share_mode(
2455 get_current_uid(fsp->conn),
2461 return NT_STATUS_NO_MEMORY;
2464 ok = update_num_read_oplocks(fsp, lck);
2466 del_share_mode(lck, fsp);
2467 return NT_STATUS_INTERNAL_ERROR;
2470 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
2471 fsp->oplock_type, fsp_str_dbg(fsp)));
2473 return NT_STATUS_OK;
2476 static bool request_timed_out(struct timeval request_time,
2477 struct timeval timeout)
2479 struct timeval now, end_time;
2481 end_time = timeval_sum(&request_time, &timeout);
2482 return (timeval_compare(&end_time, &now) < 0);
2485 static struct deferred_open_record *deferred_open_record_create(
2486 bool delayed_for_oplocks,
2490 struct deferred_open_record *record = NULL;
2492 record = talloc(NULL, struct deferred_open_record);
2493 if (record == NULL) {
2497 *record = (struct deferred_open_record) {
2498 .delayed_for_oplocks = delayed_for_oplocks,
2499 .async_open = async_open,
2506 struct defer_open_state {
2507 struct smbXsrv_connection *xconn;
2511 static void defer_open_done(struct tevent_req *req);
2514 * Defer an open and watch a locking.tdb record
2516 * This defers an open that gets rescheduled once the locking.tdb record watch
2517 * is triggered by a change to the record.
2519 * It is used to defer opens that triggered an oplock break and for the SMB1
2520 * sharing violation delay.
2522 static void defer_open(struct share_mode_lock *lck,
2523 struct timeval request_time,
2524 struct timeval timeout,
2525 struct smb_request *req,
2526 bool delayed_for_oplocks,
2529 struct deferred_open_record *open_rec = NULL;
2530 struct timeval abs_timeout;
2531 struct defer_open_state *watch_state;
2532 struct tevent_req *watch_req;
2535 abs_timeout = timeval_sum(&request_time, &timeout);
2537 DBG_DEBUG("request time [%s] timeout [%s] mid [%" PRIu64 "] "
2538 "delayed_for_oplocks [%s] file_id [%s]\n",
2539 timeval_string(talloc_tos(), &request_time, false),
2540 timeval_string(talloc_tos(), &abs_timeout, false),
2542 delayed_for_oplocks ? "yes" : "no",
2543 file_id_string_tos(&id));
2545 open_rec = deferred_open_record_create(delayed_for_oplocks,
2548 if (open_rec == NULL) {
2550 exit_server("talloc failed");
2553 watch_state = talloc(open_rec, struct defer_open_state);
2554 if (watch_state == NULL) {
2555 exit_server("talloc failed");
2557 watch_state->xconn = req->xconn;
2558 watch_state->mid = req->mid;
2560 DBG_DEBUG("defering mid %" PRIu64 "\n", req->mid);
2562 watch_req = dbwrap_watched_watch_send(watch_state,
2565 (struct server_id){0});
2566 if (watch_req == NULL) {
2567 exit_server("Could not watch share mode record");
2569 tevent_req_set_callback(watch_req, defer_open_done, watch_state);
2571 ok = tevent_req_set_endtime(watch_req, req->sconn->ev_ctx, abs_timeout);
2573 exit_server("tevent_req_set_endtime failed");
2576 ok = push_deferred_open_message_smb(req, request_time, timeout,
2577 open_rec->id, open_rec);
2580 exit_server("push_deferred_open_message_smb failed");
2584 static void defer_open_done(struct tevent_req *req)
2586 struct defer_open_state *state = tevent_req_callback_data(
2587 req, struct defer_open_state);
2591 status = dbwrap_watched_watch_recv(req, NULL, NULL);
2593 if (!NT_STATUS_IS_OK(status)) {
2594 DEBUG(5, ("dbwrap_watched_watch_recv returned %s\n",
2595 nt_errstr(status)));
2597 * Even if it failed, retry anyway. TODO: We need a way to
2598 * tell a re-scheduled open about that error.
2602 DEBUG(10, ("scheduling mid %llu\n", (unsigned long long)state->mid));
2604 ret = schedule_deferred_open_message_smb(state->xconn, state->mid);
2610 * Actually attempt the kernel oplock polling open.
2613 static void kernel_oplock_poll_open_timer(struct tevent_context *ev,
2614 struct tevent_timer *te,
2615 struct timeval current_time,
2619 struct smb_request *req = (struct smb_request *)private_data;
2621 ok = schedule_deferred_open_message_smb(req->xconn, req->mid);
2623 exit_server("schedule_deferred_open_message_smb failed");
2625 DBG_DEBUG("kernel_oplock_poll_open_timer fired. Retying open !\n");
2629 * Reschedule an open for 1 second from now, if not timed out.
2631 static void setup_kernel_oplock_poll_open(struct timeval request_time,
2632 struct smb_request *req,
2637 struct deferred_open_record *open_rec = NULL;
2638 /* Maximum wait time. */
2639 struct timeval timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
2641 if (request_timed_out(request_time, timeout)) {
2645 open_rec = deferred_open_record_create(false, false, id);
2646 if (open_rec == NULL) {
2647 exit_server("talloc failed");
2650 ok = push_deferred_open_message_smb(req,
2656 exit_server("push_deferred_open_message_smb failed");
2660 * As this timer event is owned by req, it will
2661 * disappear if req it talloc_freed.
2663 open_rec->te = tevent_add_timer(req->sconn->ev_ctx,
2665 timeval_current_ofs(1, 0),
2666 kernel_oplock_poll_open_timer,
2668 if (open_rec->te == NULL) {
2669 exit_server("tevent_add_timer failed");
2672 DBG_DEBUG("poll request time [%s] mid [%" PRIu64 "] file_id [%s]\n",
2673 timeval_string(talloc_tos(), &request_time, false),
2675 file_id_string_tos(&id));
2678 /****************************************************************************
2679 On overwrite open ensure that the attributes match.
2680 ****************************************************************************/
2682 static bool open_match_attributes(connection_struct *conn,
2683 uint32_t old_dos_attr,
2684 uint32_t new_dos_attr,
2685 mode_t new_unx_mode,
2686 mode_t *returned_unx_mode)
2688 uint32_t noarch_old_dos_attr, noarch_new_dos_attr;
2690 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
2691 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
2693 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
2694 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
2695 *returned_unx_mode = new_unx_mode;
2697 *returned_unx_mode = (mode_t)0;
2700 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
2701 "new_dos_attr = 0x%x "
2702 "returned_unx_mode = 0%o\n",
2703 (unsigned int)old_dos_attr,
2704 (unsigned int)new_dos_attr,
2705 (unsigned int)*returned_unx_mode ));
2707 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
2708 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
2709 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
2710 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
2714 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
2715 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
2716 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
2723 /****************************************************************************
2724 Special FCB or DOS processing in the case of a sharing violation.
2725 Try and find a duplicated file handle.
2726 ****************************************************************************/
2728 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
2729 connection_struct *conn,
2730 files_struct *fsp_to_dup_into,
2731 const struct smb_filename *smb_fname,
2735 uint32_t access_mask,
2736 uint32_t share_access,
2737 uint32_t create_options)
2741 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
2742 "file %s.\n", smb_fname_str_dbg(smb_fname)));
2744 for(fsp = file_find_di_first(conn->sconn, id); fsp;
2745 fsp = file_find_di_next(fsp)) {
2747 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
2748 "vuid = %llu, file_pid = %u, private_options = 0x%x "
2749 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
2750 fsp->fh->fd, (unsigned long long)fsp->vuid,
2751 (unsigned int)fsp->file_pid,
2752 (unsigned int)fsp->fh->private_options,
2753 (unsigned int)fsp->access_mask ));
2755 if (fsp != fsp_to_dup_into &&
2756 fsp->fh->fd != -1 &&
2757 fsp->vuid == vuid &&
2758 fsp->file_pid == file_pid &&
2759 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
2760 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
2761 (fsp->access_mask & FILE_WRITE_DATA) &&
2762 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
2763 strequal(fsp->fsp_name->stream_name,
2764 smb_fname->stream_name)) {
2765 DEBUG(10,("fcb_or_dos_open: file match\n"));
2771 return NT_STATUS_NOT_FOUND;
2774 /* quite an insane set of semantics ... */
2775 if (is_executable(smb_fname->base_name) &&
2776 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
2777 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
2778 return NT_STATUS_INVALID_PARAMETER;
2781 /* We need to duplicate this fsp. */
2782 return dup_file_fsp(req, fsp, access_mask, share_access,
2783 create_options, fsp_to_dup_into);
2786 static void schedule_defer_open(struct share_mode_lock *lck,
2788 struct timeval request_time,
2789 struct smb_request *req)
2791 /* This is a relative time, added to the absolute
2792 request_time value to get the absolute timeout time.
2793 Note that if this is the second or greater time we enter
2794 this codepath for this particular request mid then
2795 request_time is left as the absolute time of the *first*
2796 time this request mid was processed. This is what allows
2797 the request to eventually time out. */
2799 struct timeval timeout;
2801 /* Normally the smbd we asked should respond within
2802 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
2803 * the client did, give twice the timeout as a safety
2804 * measure here in case the other smbd is stuck
2805 * somewhere else. */
2807 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
2809 if (request_timed_out(request_time, timeout)) {
2813 defer_open(lck, request_time, timeout, req, true, id);
2816 /****************************************************************************
2817 Reschedule an open call that went asynchronous.
2818 ****************************************************************************/
2820 static void schedule_async_open_timer(struct tevent_context *ev,
2821 struct tevent_timer *te,
2822 struct timeval current_time,
2825 exit_server("async open timeout");
2828 static void schedule_async_open(struct timeval request_time,
2829 struct smb_request *req)
2831 struct deferred_open_record *open_rec = NULL;
2832 struct timeval timeout = timeval_set(20, 0);
2835 if (request_timed_out(request_time, timeout)) {
2839 open_rec = deferred_open_record_create(false, true, (struct file_id){0});
2840 if (open_rec == NULL) {
2841 exit_server("deferred_open_record_create failed");
2844 ok = push_deferred_open_message_smb(req, request_time, timeout,
2845 (struct file_id){0}, open_rec);
2847 exit_server("push_deferred_open_message_smb failed");
2850 open_rec->te = tevent_add_timer(req->sconn->ev_ctx,
2852 timeval_current_ofs(20, 0),
2853 schedule_async_open_timer,
2855 if (open_rec->te == NULL) {
2856 exit_server("tevent_add_timer failed");
2860 /****************************************************************************
2861 Work out what access_mask to use from what the client sent us.
2862 ****************************************************************************/
2864 static NTSTATUS smbd_calculate_maximum_allowed_access(
2865 connection_struct *conn,
2866 const struct smb_filename *smb_fname,
2868 uint32_t *p_access_mask)
2870 struct security_descriptor *sd;
2871 uint32_t access_granted;
2874 if (!use_privs && (get_current_uid(conn) == (uid_t)0)) {
2875 *p_access_mask |= FILE_GENERIC_ALL;
2876 return NT_STATUS_OK;
2879 status = SMB_VFS_GET_NT_ACL(conn, smb_fname,
2885 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2887 * File did not exist
2889 *p_access_mask = FILE_GENERIC_ALL;
2890 return NT_STATUS_OK;
2892 if (!NT_STATUS_IS_OK(status)) {
2893 DEBUG(10,("Could not get acl on file %s: %s\n",
2894 smb_fname_str_dbg(smb_fname),
2895 nt_errstr(status)));
2896 return NT_STATUS_ACCESS_DENIED;
2900 * If we can access the path to this file, by
2901 * default we have FILE_READ_ATTRIBUTES from the
2902 * containing directory. See the section:
2903 * "Algorithm to Check Access to an Existing File"
2906 * se_file_access_check()
2907 * also takes care of owner WRITE_DAC and READ_CONTROL.
2909 status = se_file_access_check(sd,
2910 get_current_nttok(conn),
2912 (*p_access_mask & ~FILE_READ_ATTRIBUTES),
2917 if (!NT_STATUS_IS_OK(status)) {
2918 DEBUG(10, ("Access denied on file %s: "
2919 "when calculating maximum access\n",
2920 smb_fname_str_dbg(smb_fname)));
2921 return NT_STATUS_ACCESS_DENIED;
2923 *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
2925 if (!(access_granted & DELETE_ACCESS)) {
2926 if (can_delete_file_in_directory(conn, smb_fname)) {
2927 *p_access_mask |= DELETE_ACCESS;
2931 return NT_STATUS_OK;
2934 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
2935 const struct smb_filename *smb_fname,
2937 uint32_t access_mask,
2938 uint32_t *access_mask_out)
2941 uint32_t orig_access_mask = access_mask;
2942 uint32_t rejected_share_access;
2944 if (access_mask & SEC_MASK_INVALID) {
2945 DBG_DEBUG("access_mask [%8x] contains invalid bits\n",
2947 return NT_STATUS_ACCESS_DENIED;
2951 * Convert GENERIC bits to specific bits.
2954 se_map_generic(&access_mask, &file_generic_mapping);
2956 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
2957 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
2959 status = smbd_calculate_maximum_allowed_access(
2960 conn, smb_fname, use_privs, &access_mask);
2962 if (!NT_STATUS_IS_OK(status)) {
2966 access_mask &= conn->share_access;
2969 rejected_share_access = access_mask & ~(conn->share_access);
2971 if (rejected_share_access) {
2972 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
2973 "file %s: rejected by share access mask[0x%08X] "
2974 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
2975 smb_fname_str_dbg(smb_fname),
2977 orig_access_mask, access_mask,
2978 rejected_share_access));
2979 return NT_STATUS_ACCESS_DENIED;
2982 *access_mask_out = access_mask;
2983 return NT_STATUS_OK;
2986 /****************************************************************************
2987 Remove the deferred open entry under lock.
2988 ****************************************************************************/
2990 /****************************************************************************
2991 Return true if this is a state pointer to an asynchronous create.
2992 ****************************************************************************/
2994 bool is_deferred_open_async(const struct deferred_open_record *rec)
2996 return rec->async_open;
2999 static bool clear_ads(uint32_t create_disposition)
3003 switch (create_disposition) {
3004 case FILE_SUPERSEDE:
3005 case FILE_OVERWRITE_IF:
3006 case FILE_OVERWRITE:
3015 static int disposition_to_open_flags(uint32_t create_disposition)
3020 * Currently we're using FILE_SUPERSEDE as the same as
3021 * FILE_OVERWRITE_IF but they really are
3022 * different. FILE_SUPERSEDE deletes an existing file
3023 * (requiring delete access) then recreates it.
3026 switch (create_disposition) {
3027 case FILE_SUPERSEDE:
3028 case FILE_OVERWRITE_IF:
3030 * If file exists replace/overwrite. If file doesn't
3033 ret = O_CREAT|O_TRUNC;
3038 * If file exists open. If file doesn't exist error.
3043 case FILE_OVERWRITE:
3045 * If file exists overwrite. If file doesn't exist
3053 * If file exists error. If file doesn't exist create.
3055 ret = O_CREAT|O_EXCL;
3060 * If file exists open. If file doesn't exist create.
3068 static int calculate_open_access_flags(uint32_t access_mask,
3069 uint32_t private_flags)
3071 bool need_write, need_read;
3074 * Note that we ignore the append flag as append does not
3075 * mean the same thing under DOS and Unix.
3078 need_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA));
3083 /* DENY_DOS opens are always underlying read-write on the
3084 file handle, no matter what the requested access mask
3088 ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
3089 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|
3090 FILE_READ_EA|FILE_EXECUTE));
3098 /****************************************************************************
3099 Open a file with a share mode. Passed in an already created files_struct *.
3100 ****************************************************************************/
3102 static NTSTATUS open_file_ntcreate(connection_struct *conn,
3103 struct smb_request *req,
3104 uint32_t access_mask, /* access bits (FILE_READ_DATA etc.) */
3105 uint32_t share_access, /* share constants (FILE_SHARE_READ etc) */
3106 uint32_t create_disposition, /* FILE_OPEN_IF etc. */
3107 uint32_t create_options, /* options such as delete on close. */
3108 uint32_t new_dos_attributes, /* attributes used for new file. */
3109 int oplock_request, /* internal Samba oplock codes. */
3110 struct smb2_lease *lease,
3111 /* Information (FILE_EXISTS etc.) */
3112 uint32_t private_flags, /* Samba specific flags. */
3116 struct smb_filename *smb_fname = fsp->fsp_name;
3119 bool file_existed = VALID_STAT(smb_fname->st);
3120 bool def_acl = False;
3121 bool posix_open = False;
3122 bool new_file_created = False;
3123 bool first_open_attempt = true;
3124 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
3125 mode_t new_unx_mode = (mode_t)0;
3126 mode_t unx_mode = (mode_t)0;
3128 uint32_t existing_dos_attributes = 0;
3129 struct timeval request_time = timeval_zero();
3130 struct share_mode_lock *lck = NULL;
3131 uint32_t open_access_mask = access_mask;
3134 SMB_STRUCT_STAT saved_stat = smb_fname->st;
3135 struct timespec old_write_time;
3138 if (conn->printer) {
3140 * Printers are handled completely differently.
3141 * Most of the passed parameters are ignored.
3145 *pinfo = FILE_WAS_CREATED;
3148 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
3149 smb_fname_str_dbg(smb_fname)));
3152 DEBUG(0,("open_file_ntcreate: printer open without "
3153 "an SMB request!\n"));
3154 return NT_STATUS_INTERNAL_ERROR;
3157 return print_spool_open(fsp, smb_fname->base_name,
3161 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
3163 return NT_STATUS_NO_MEMORY;
3166 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3168 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
3169 new_dos_attributes = 0;
3171 /* Windows allows a new file to be created and
3172 silently removes a FILE_ATTRIBUTE_DIRECTORY
3173 sent by the client. Do the same. */
3175 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
3177 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
3179 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
3180 smb_fname, parent_dir);
3183 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
3184 "access_mask=0x%x share_access=0x%x "
3185 "create_disposition = 0x%x create_options=0x%x "
3186 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
3187 smb_fname_str_dbg(smb_fname), new_dos_attributes,
3188 access_mask, share_access, create_disposition,
3189 create_options, (unsigned int)unx_mode, oplock_request,
3190 (unsigned int)private_flags));
3193 /* Ensure req == NULL means INTERNAL_OPEN_ONLY */
3194 SMB_ASSERT(((oplock_request & INTERNAL_OPEN_ONLY) != 0));
3196 /* And req != NULL means no INTERNAL_OPEN_ONLY */
3197 SMB_ASSERT(((oplock_request & INTERNAL_OPEN_ONLY) == 0));
3201 * Only non-internal opens can be deferred at all
3205 struct deferred_open_record *open_rec;
3206 if (get_deferred_open_message_state(req,
3209 /* Remember the absolute time of the original
3210 request with this mid. We'll use it later to
3211 see if this has timed out. */
3213 /* If it was an async create retry, the file
3216 if (is_deferred_open_async(open_rec)) {
3217 SET_STAT_INVALID(smb_fname->st);
3218 file_existed = false;
3221 /* Ensure we don't reprocess this message. */
3222 remove_deferred_open_message_smb(req->xconn, req->mid);
3224 first_open_attempt = false;
3229 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
3232 * Only use strored DOS attributes for checks
3233 * against requested attributes (below via
3234 * open_match_attributes()), cf bug #11992
3235 * for details. -slow
3239 status = SMB_VFS_GET_DOS_ATTRIBUTES(conn, smb_fname, &attr);
3240 if (NT_STATUS_IS_OK(status)) {
3241 existing_dos_attributes = attr;
3246 /* ignore any oplock requests if oplocks are disabled */
3247 if (!lp_oplocks(SNUM(conn)) ||
3248 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
3249 /* Mask off everything except the private Samba bits. */
3250 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
3253 /* this is for OS/2 long file names - say we don't support them */
3254 if (req != NULL && !req->posix_pathnames &&
3255 strstr(smb_fname->base_name,".+,;=[].")) {
3256 /* OS/2 Workplace shell fix may be main code stream in a later
3258 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
3260 if (use_nt_status()) {
3261 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
3263 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
3266 switch( create_disposition ) {
3268 /* If file exists open. If file doesn't exist error. */
3269 if (!file_existed) {
3270 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
3271 "requested for file %s and file "
3273 smb_fname_str_dbg(smb_fname)));
3275 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
3279 case FILE_OVERWRITE:
3280 /* If file exists overwrite. If file doesn't exist
3282 if (!file_existed) {
3283 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
3284 "requested for file %s and file "
3286 smb_fname_str_dbg(smb_fname) ));
3288 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
3293 /* If file exists error. If file doesn't exist
3296 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
3297 "requested for file %s and file "
3298 "already exists.\n",
3299 smb_fname_str_dbg(smb_fname)));
3300 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
3305 return map_nt_error_from_unix(errno);
3309 case FILE_SUPERSEDE:
3310 case FILE_OVERWRITE_IF:
3314 return NT_STATUS_INVALID_PARAMETER;
3317 flags2 = disposition_to_open_flags(create_disposition);
3319 /* We only care about matching attributes on file exists and
3322 if (!posix_open && file_existed &&
3323 ((create_disposition == FILE_OVERWRITE) ||
3324 (create_disposition == FILE_OVERWRITE_IF))) {
3325 if (!open_match_attributes(conn, existing_dos_attributes,
3327 unx_mode, &new_unx_mode)) {
3328 DEBUG(5,("open_file_ntcreate: attributes mismatch "
3329 "for file %s (%x %x) (0%o, 0%o)\n",
3330 smb_fname_str_dbg(smb_fname),
3331 existing_dos_attributes,
3333 (unsigned int)smb_fname->st.st_ex_mode,
3334 (unsigned int)unx_mode ));
3336 return NT_STATUS_ACCESS_DENIED;
3340 status = smbd_calculate_access_mask(conn, smb_fname,
3344 if (!NT_STATUS_IS_OK(status)) {
3345 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
3346 "on file %s returned %s\n",
3347 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
3351 open_access_mask = access_mask;
3353 if (flags2 & O_TRUNC) {
3354 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
3357 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
3358 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
3362 * Note that we ignore the append flag as append does not
3363 * mean the same thing under DOS and Unix.
3366 flags = calculate_open_access_flags(access_mask, private_flags);
3369 * Currently we only look at FILE_WRITE_THROUGH for create options.
3373 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
3378 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
3382 if (!posix_open && !CAN_WRITE(conn)) {
3384 * We should really return a permission denied error if either
3385 * O_CREAT or O_TRUNC are set, but for compatibility with
3386 * older versions of Samba we just AND them out.
3388 flags2 &= ~(O_CREAT|O_TRUNC);
3391 if (lp_kernel_oplocks(SNUM(conn))) {
3393 * With kernel oplocks the open breaking an oplock
3394 * blocks until the oplock holder has given up the
3395 * oplock or closed the file. We prevent this by always
3396 * trying to open the file with O_NONBLOCK (see "man
3399 * If a process that doesn't use the smbd open files
3400 * database or communication methods holds a kernel
3401 * oplock we must periodically poll for available open
3404 flags2 |= O_NONBLOCK;
3408 * Ensure we can't write on a read-only share or file.
3411 if (flags != O_RDONLY && file_existed &&
3412 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
3413 DEBUG(5,("open_file_ntcreate: write access requested for "
3414 "file %s on read only %s\n",
3415 smb_fname_str_dbg(smb_fname),
3416 !CAN_WRITE(conn) ? "share" : "file" ));
3418 return NT_STATUS_ACCESS_DENIED;
3421 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
3422 fsp->share_access = share_access;
3423 fsp->fh->private_options = private_flags;
3424 fsp->access_mask = open_access_mask; /* We change this to the
3425 * requested access_mask after
3426 * the open is done. */
3428 fsp->posix_flags |= FSP_POSIX_FLAGS_ALL;
3431 if (timeval_is_zero(&request_time)) {
3432 request_time = fsp->open_time;
3435 if ((create_options & FILE_DELETE_ON_CLOSE) &&
3436 (flags2 & O_CREAT) &&
3438 /* Delete on close semantics for new files. */
3439 status = can_set_delete_on_close(fsp,
3440 new_dos_attributes);
3441 if (!NT_STATUS_IS_OK(status)) {
3448 * Ensure we pay attention to default ACLs on directories if required.
3451 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
3452 (def_acl = directory_has_default_acl(conn, parent_dir))) {
3453 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
3456 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
3457 "access_mask = 0x%x, open_access_mask = 0x%x\n",
3458 (unsigned int)flags, (unsigned int)flags2,
3459 (unsigned int)unx_mode, (unsigned int)access_mask,
3460 (unsigned int)open_access_mask));
3462 fsp_open = open_file(fsp, conn, req, parent_dir,
3463 flags|flags2, unx_mode, access_mask,
3464 open_access_mask, &new_file_created);
3466 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_NETWORK_BUSY)) {
3470 * This handles the kernel oplock case:
3472 * the file has an active kernel oplock and the open() returned
3473 * EWOULDBLOCK/EAGAIN which maps to NETWORK_BUSY.
3475 * "Samba locking.tdb oplocks" are handled below after acquiring
3476 * the sharemode lock with get_share_mode_lock().
3478 if (file_existed && S_ISFIFO(fsp->fsp_name->st.st_ex_mode)) {
3479 DEBUG(10, ("FIFO busy\n"));
3480 return NT_STATUS_NETWORK_BUSY;
3483 DEBUG(10, ("Internal open busy\n"));
3484 return NT_STATUS_NETWORK_BUSY;
3488 * From here on we assume this is an oplock break triggered
3491 lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
3494 * No oplock from Samba around. Set up a poll every 1
3495 * second to retry a non-blocking open until the time
3498 setup_kernel_oplock_poll_open(request_time,
3501 DBG_DEBUG("No Samba oplock around after EWOULDBLOCK. "
3502 "Retrying with poll\n");
3503 return NT_STATUS_SHARING_VIOLATION;
3506 if (!validate_oplock_types(lck)) {
3507 smb_panic("validate_oplock_types failed");
3510 delay = delay_for_oplock(fsp, 0, lease, lck, false,
3512 first_open_attempt);
3514 schedule_defer_open(lck, fsp->file_id, request_time,
3517 DEBUG(10, ("Sent oplock break request to kernel "
3518 "oplock holder\n"));
3519 return NT_STATUS_SHARING_VIOLATION;
3523 * No oplock from Samba around. Set up a poll every 1
3524 * second to retry a non-blocking open until the time
3527 setup_kernel_oplock_poll_open(request_time, req, fsp->file_id);
3530 DBG_DEBUG("No Samba oplock around after EWOULDBLOCK. "
3531 "Retrying with poll\n");
3532 return NT_STATUS_SHARING_VIOLATION;
3535 if (!NT_STATUS_IS_OK(fsp_open)) {
3536 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_RETRY)) {
3537 schedule_async_open(request_time, req);
3542 if (new_file_created) {
3544 * As we atomically create using O_CREAT|O_EXCL,
3545 * then if new_file_created is true, then
3546 * file_existed *MUST* have been false (even
3547 * if the file was previously detected as being
3550 file_existed = false;
3553 if (file_existed && !check_same_dev_ino(&saved_stat, &smb_fname->st)) {
3555 * The file did exist, but some other (local or NFS)
3556 * process either renamed/unlinked and re-created the
3557 * file with different dev/ino after we walked the path,
3558 * but before we did the open. We could retry the
3559 * open but it's a rare enough case it's easier to
3560 * just fail the open to prevent creating any problems
3561 * in the open file db having the wrong dev/ino key.
3564 DBG_WARNING("file %s - dev/ino mismatch. "
3565 "Old (dev=%ju, ino=%ju). "
3566 "New (dev=%ju, ino=%ju). Failing open "
3567 "with NT_STATUS_ACCESS_DENIED.\n",
3568 smb_fname_str_dbg(smb_fname),
3569 (uintmax_t)saved_stat.st_ex_dev,
3570 (uintmax_t)saved_stat.st_ex_ino,
3571 (uintmax_t)smb_fname->st.st_ex_dev,
3572 (uintmax_t)smb_fname->st.st_ex_ino);
3573 return NT_STATUS_ACCESS_DENIED;
3576 old_write_time = smb_fname->st.st_ex_mtime;
3579 * Deal with the race condition where two smbd's detect the
3580 * file doesn't exist and do the create at the same time. One
3581 * of them will win and set a share mode, the other (ie. this
3582 * one) should check if the requested share mode for this
3583 * create is allowed.
3587 * Now the file exists and fsp is successfully opened,
3588 * fsp->dev and fsp->inode are valid and should replace the
3589 * dev=0,inode=0 from a non existent file. Spotted by
3590 * Nadav Danieli <nadavd@exanet.com>. JRA.
3595 lck = get_share_mode_lock(talloc_tos(), id,
3597 smb_fname, &old_write_time);
3600 DEBUG(0, ("open_file_ntcreate: Could not get share "
3601 "mode lock for %s\n",
3602 smb_fname_str_dbg(smb_fname)));
3604 return NT_STATUS_SHARING_VIOLATION;
3607 /* Get the types we need to examine. */
3608 if (!validate_oplock_types(lck)) {
3609 smb_panic("validate_oplock_types failed");
3612 if (has_delete_on_close(lck, fsp->name_hash)) {
3615 return NT_STATUS_DELETE_PENDING;
3618 status = open_mode_check(conn, lck,
3619 access_mask, share_access);
3621 if (NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION) ||
3622 (lck->data->num_share_modes > 0)) {
3624 * This comes from ancient times out of open_mode_check. I
3625 * have no clue whether this is still necessary. I can't think
3626 * of a case where this would actually matter further down in
3627 * this function. I leave it here for further investigation
3630 file_existed = true;
3635 * Handle oplocks, deferring the request if delay_for_oplock()
3636 * triggered a break message and we have to wait for the break
3640 bool sharing_violation = NT_STATUS_EQUAL(
3641 status, NT_STATUS_SHARING_VIOLATION);
3643 delay = delay_for_oplock(fsp, oplock_request, lease, lck,
3646 first_open_attempt);
3648 schedule_defer_open(lck, fsp->file_id,
3652 return NT_STATUS_SHARING_VIOLATION;
3656 if (!NT_STATUS_IS_OK(status)) {
3657 uint32_t can_access_mask;
3658 bool can_access = True;
3660 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
3662 /* Check if this can be done with the deny_dos and fcb
3665 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
3666 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
3668 DEBUG(0, ("DOS open without an SMB "
3672 return NT_STATUS_INTERNAL_ERROR;
3675 /* Use the client requested access mask here,
3676 * not the one we open with. */
3677 status = fcb_or_dos_open(req,
3688 if (NT_STATUS_IS_OK(status)) {
3691 *pinfo = FILE_WAS_OPENED;
3693 return NT_STATUS_OK;
3698 * This next line is a subtlety we need for
3699 * MS-Access. If a file open will fail due to share
3700 * permissions and also for security (access) reasons,
3701 * we need to return the access failed error, not the
3702 * share error. We can't open the file due to kernel
3703 * oplock deadlock (it's possible we failed above on
3704 * the open_mode_check()) so use a userspace check.
3707 if (flags & O_RDWR) {
3708 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
3709 } else if (flags & O_WRONLY) {
3710 can_access_mask = FILE_WRITE_DATA;
3712 can_access_mask = FILE_READ_DATA;
3715 if (((can_access_mask & FILE_WRITE_DATA) &&
3716 !CAN_WRITE(conn)) ||
3717 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
3720 can_access_mask))) {
3725 * If we're returning a share violation, ensure we
3726 * cope with the braindead 1 second delay (SMB1 only).
3729 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
3730 !conn->sconn->using_smb2 &&
3731 lp_defer_sharing_violations()) {
3732 struct timeval timeout;
3735 /* this is a hack to speed up torture tests
3737 timeout_usecs = lp_parm_int(SNUM(conn),
3738 "smbd","sharedelay",
3739 SHARING_VIOLATION_USEC_WAIT);
3741 /* This is a relative time, added to the absolute
3742 request_time value to get the absolute timeout time.
3743 Note that if this is the second or greater time we enter
3744 this codepath for this particular request mid then
3745 request_time is left as the absolute time of the *first*
3746 time this request mid was processed. This is what allows
3747 the request to eventually time out. */
3749 timeout = timeval_set(0, timeout_usecs);
3751 if (!request_timed_out(request_time, timeout)) {
3752 defer_open(lck, request_time, timeout, req,
3761 * We have detected a sharing violation here
3762 * so return the correct error code
3764 status = NT_STATUS_SHARING_VIOLATION;
3766 status = NT_STATUS_ACCESS_DENIED;
3771 /* Should we atomically (to the client at least) truncate ? */
3772 if ((!new_file_created) &&
3773 (flags2 & O_TRUNC) &&
3774 (!S_ISFIFO(fsp->fsp_name->st.st_ex_mode))) {
3777 ret = vfs_set_filelen(fsp, 0);
3779 status = map_nt_error_from_unix(errno);
3787 * We have the share entry *locked*.....
3790 /* Delete streams if create_disposition requires it */
3791 if (!new_file_created && clear_ads(create_disposition) &&
3792 !is_ntfs_stream_smb_fname(smb_fname)) {
3793 status = delete_all_streams(conn, smb_fname);
3794 if (!NT_STATUS_IS_OK(status)) {
3801 /* note that we ignore failure for the following. It is
3802 basically a hack for NFS, and NFS will never set one of
3803 these only read them. Nobody but Samba can ever set a deny
3804 mode and we have already checked our more authoritative
3805 locking database for permission to set this deny mode. If
3806 the kernel refuses the operations then the kernel is wrong.
3807 note that GPFS supports it as well - jmcd */
3809 if (fsp->fh->fd != -1 && lp_kernel_share_modes(SNUM(conn))) {
3812 * Beware: streams implementing VFS modules may
3813 * implement streams in a way that fsp will have the
3814 * basefile open in the fsp fd, so lacking a distinct
3815 * fd for the stream kernel_flock will apply on the
3816 * basefile which is wrong. The actual check is
3817 * deffered to the VFS module implementing the
3818 * kernel_flock call.
3820 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
3821 if(ret_flock == -1 ){
3826 return NT_STATUS_SHARING_VIOLATION;
3829 fsp->kernel_share_modes_taken = true;
3833 * At this point onwards, we can guarantee that the share entry
3834 * is locked, whether we created the file or not, and that the
3835 * deny mode is compatible with all current opens.
3839 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
3840 * but we don't have to store this - just ignore it on access check.
3842 if (conn->sconn->using_smb2) {
3844 * SMB2 doesn't return it (according to Microsoft tests).
3845 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
3846 * File created with access = 0x7 (Read, Write, Delete)
3847 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
3849 fsp->access_mask = access_mask;
3851 /* But SMB1 does. */
3852 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3857 * stat opens on existing files don't get oplocks.
3858 * They can get leases.
3860 * Note that we check for stat open on the *open_access_mask*,
3861 * i.e. the access mask we actually used to do the open,
3862 * not the one the client asked for (which is in
3863 * fsp->access_mask). This is due to the fact that
3864 * FILE_OVERWRITE and FILE_OVERWRITE_IF add in O_TRUNC,
3865 * which adds FILE_WRITE_DATA to open_access_mask.
3867 if (is_stat_open(open_access_mask) && lease == NULL) {
3868 oplock_request = NO_OPLOCK;
3872 if (new_file_created) {
3873 info = FILE_WAS_CREATED;
3875 if (flags2 & O_TRUNC) {
3876 info = FILE_WAS_OVERWRITTEN;
3878 info = FILE_WAS_OPENED;
3887 * Setup the oplock info in both the shared memory and
3890 status = grant_fsp_oplock_type(req, fsp, lck, oplock_request, lease);
3891 if (!NT_STATUS_IS_OK(status)) {
3897 /* Handle strange delete on close create semantics. */
3898 if (create_options & FILE_DELETE_ON_CLOSE) {
3899 if (!new_file_created) {
3900 status = can_set_delete_on_close(fsp,
3901 existing_dos_attributes);
3903 if (!NT_STATUS_IS_OK(status)) {
3904 /* Remember to delete the mode we just added. */
3905 del_share_mode(lck, fsp);
3911 /* Note that here we set the *initial* delete on close flag,
3912 not the regular one. The magic gets handled in close. */
3913 fsp->initial_delete_on_close = True;
3916 if (info != FILE_WAS_OPENED) {
3917 /* Overwritten files should be initially set as archive */
3918 if ((info == FILE_WAS_OVERWRITTEN && lp_map_archive(SNUM(conn))) ||
3919 lp_store_dos_attributes(SNUM(conn))) {
3921 if (file_set_dosmode(conn, smb_fname,
3922 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
3923 parent_dir, true) == 0) {
3924 unx_mode = smb_fname->st.st_ex_mode;
3930 /* Determine sparse flag. */
3932 /* POSIX opens are sparse by default. */
3933 fsp->is_sparse = true;
3935 fsp->is_sparse = (file_existed &&
3936 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
3940 * Take care of inherited ACLs on created files - if default ACL not
3944 if (!posix_open && new_file_created && !def_acl) {
3945 if (unx_mode != smb_fname->st.st_ex_mode) {
3946 int ret = SMB_VFS_FCHMOD(fsp, unx_mode);
3948 DBG_INFO("failed to reset "
3949 "attributes of file %s to 0%o\n",
3950 smb_fname_str_dbg(smb_fname),
3951 (unsigned int)unx_mode);
3955 } else if (new_unx_mode) {
3957 * We only get here in the case of:
3959 * a). Not a POSIX open.
3960 * b). File already existed.
3961 * c). File was overwritten.
3962 * d). Requested DOS attributes didn't match
3963 * the DOS attributes on the existing file.
3965 * In that case new_unx_mode has been set
3966 * equal to the calculated mode (including
3967 * possible inheritance of the mode from the
3968 * containing directory).
3970 * Note this mode was calculated with the
3971 * DOS attribute FILE_ATTRIBUTE_ARCHIVE added,
3972 * so the mode change here is suitable for
3973 * an overwritten file.
3976 if (new_unx_mode != smb_fname->st.st_ex_mode) {
3977 int ret = SMB_VFS_FCHMOD(fsp, new_unx_mode);
3979 DBG_INFO("failed to reset "
3980 "attributes of file %s to 0%o\n",
3981 smb_fname_str_dbg(smb_fname),
3982 (unsigned int)new_unx_mode);
3989 * Deal with other opens having a modified write time.
3991 struct timespec write_time = get_share_mode_write_time(lck);
3993 if (!null_timespec(write_time)) {
3994 update_stat_ex_mtime(&fsp->fsp_name->st, write_time);
4000 return NT_STATUS_OK;
4003 static NTSTATUS mkdir_internal(connection_struct *conn,
4004 struct smb_filename *smb_dname,
4005 uint32_t file_attributes)
4008 char *parent_dir = NULL;
4010 bool posix_open = false;
4011 bool need_re_stat = false;
4012 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
4014 if (!CAN_WRITE(conn) || (access_mask & ~(conn->share_access))) {
4015 DEBUG(5,("mkdir_internal: failing share access "
4016 "%s\n", lp_servicename(talloc_tos(), SNUM(conn))));
4017 return NT_STATUS_ACCESS_DENIED;
4020 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
4022 return NT_STATUS_NO_MEMORY;
4025 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
4027 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
4029 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
4032 status = check_parent_access(conn,
4035 if(!NT_STATUS_IS_OK(status)) {
4036 DEBUG(5,("mkdir_internal: check_parent_access "
4037 "on directory %s for path %s returned %s\n",
4039 smb_dname->base_name,
4040 nt_errstr(status) ));
4044 if (SMB_VFS_MKDIR(conn, smb_dname, mode) != 0) {
4045 return map_nt_error_from_unix(errno);
4048 /* Ensure we're checking for a symlink here.... */
4049 /* We don't want to get caught by a symlink racer. */
4051 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
4052 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
4053 smb_fname_str_dbg(smb_dname), strerror(errno)));
4054 return map_nt_error_from_unix(errno);
4057 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
4058 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
4059 smb_fname_str_dbg(smb_dname)));
4060 return NT_STATUS_NOT_A_DIRECTORY;
4063 if (lp_store_dos_attributes(SNUM(conn))) {
4065 file_set_dosmode(conn, smb_dname,
4066 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
4071 if (lp_inherit_permissions(SNUM(conn))) {
4072 inherit_access_posix_acl(conn, parent_dir,
4074 need_re_stat = true;
4079 * Check if high bits should have been set,
4080 * then (if bits are missing): add them.
4081 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
4084 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
4085 (mode & ~smb_dname->st.st_ex_mode)) {
4086 SMB_VFS_CHMOD(conn, smb_dname,
4087 (smb_dname->st.st_ex_mode |
4088 (mode & ~smb_dname->st.st_ex_mode)));
4089 need_re_stat = true;
4093 /* Change the owner if required. */
4094 if (lp_inherit_owner(SNUM(conn)) != INHERIT_OWNER_NO) {
4095 change_dir_owner_to_parent(conn, parent_dir,
4098 need_re_stat = true;
4102 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
4103 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
4104 smb_fname_str_dbg(smb_dname), strerror(errno)));
4105 return map_nt_error_from_unix(errno);
4109 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
4110 smb_dname->base_name);
4112 return NT_STATUS_OK;
4115 /****************************************************************************
4116 Open a directory from an NT SMB call.
4117 ****************************************************************************/
4119 static NTSTATUS open_directory(connection_struct *conn,
4120 struct smb_request *req,
4121 struct smb_filename *smb_dname,
4122 uint32_t access_mask,
4123 uint32_t share_access,
4124 uint32_t create_disposition,
4125 uint32_t create_options,
4126 uint32_t file_attributes,
4128 files_struct **result)
4130 files_struct *fsp = NULL;
4131 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
4132 struct share_mode_lock *lck = NULL;
4134 struct timespec mtimespec;
4138 if (is_ntfs_stream_smb_fname(smb_dname)) {
4139 DEBUG(2, ("open_directory: %s is a stream name!\n",
4140 smb_fname_str_dbg(smb_dname)));
4141 return NT_STATUS_NOT_A_DIRECTORY;
4144 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
4145 /* Ensure we have a directory attribute. */
4146 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
4149 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
4150 "share_access = 0x%x create_options = 0x%x, "
4151 "create_disposition = 0x%x, file_attributes = 0x%x\n",
4152 smb_fname_str_dbg(smb_dname),
4153 (unsigned int)access_mask,
4154 (unsigned int)share_access,
4155 (unsigned int)create_options,
4156 (unsigned int)create_disposition,
4157 (unsigned int)file_attributes));
4159 status = smbd_calculate_access_mask(conn, smb_dname, false,
4160 access_mask, &access_mask);
4161 if (!NT_STATUS_IS_OK(status)) {
4162 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
4163 "on file %s returned %s\n",
4164 smb_fname_str_dbg(smb_dname),
4165 nt_errstr(status)));
4169 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
4170 !security_token_has_privilege(get_current_nttok(conn),
4171 SEC_PRIV_SECURITY)) {
4172 DEBUG(10, ("open_directory: open on %s "
4173 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
4174 smb_fname_str_dbg(smb_dname)));
4175 return NT_STATUS_PRIVILEGE_NOT_HELD;
4178 switch( create_disposition ) {
4182 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
4185 info = FILE_WAS_OPENED;
4190 /* If directory exists error. If directory doesn't
4194 status = NT_STATUS_OBJECT_NAME_COLLISION;
4195 DEBUG(2, ("open_directory: unable to create "
4196 "%s. Error was %s\n",
4197 smb_fname_str_dbg(smb_dname),
4198 nt_errstr(status)));
4202 status = mkdir_internal(conn, smb_dname,
4205 if (!NT_STATUS_IS_OK(status)) {
4206 DEBUG(2, ("open_directory: unable to create "
4207 "%s. Error was %s\n",
4208 smb_fname_str_dbg(smb_dname),
4209 nt_errstr(status)));
4213 info = FILE_WAS_CREATED;
4218 * If directory exists open. If directory doesn't
4223 status = NT_STATUS_OK;
4224 info = FILE_WAS_OPENED;
4226 status = mkdir_internal(conn, smb_dname,
4229 if (NT_STATUS_IS_OK(status)) {
4230 info = FILE_WAS_CREATED;
4232 /* Cope with create race. */
4233 if (!NT_STATUS_EQUAL(status,
4234 NT_STATUS_OBJECT_NAME_COLLISION)) {
4235 DEBUG(2, ("open_directory: unable to create "
4236 "%s. Error was %s\n",
4237 smb_fname_str_dbg(smb_dname),
4238 nt_errstr(status)));
4243 * If mkdir_internal() returned
4244 * NT_STATUS_OBJECT_NAME_COLLISION
4245 * we still must lstat the path.
4248 if (SMB_VFS_LSTAT(conn, smb_dname)
4250 DEBUG(2, ("Could not stat "
4251 "directory '%s' just "
4256 return map_nt_error_from_unix(
4260 info = FILE_WAS_OPENED;
4266 case FILE_SUPERSEDE:
4267 case FILE_OVERWRITE:
4268 case FILE_OVERWRITE_IF:
4270 DEBUG(5,("open_directory: invalid create_disposition "
4271 "0x%x for directory %s\n",
4272 (unsigned int)create_disposition,
4273 smb_fname_str_dbg(smb_dname)));
4274 return NT_STATUS_INVALID_PARAMETER;
4277 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
4278 DEBUG(5,("open_directory: %s is not a directory !\n",
4279 smb_fname_str_dbg(smb_dname)));
4280 return NT_STATUS_NOT_A_DIRECTORY;
4283 if (info == FILE_WAS_OPENED) {
4284 status = smbd_check_access_rights(conn,
4288 if (!NT_STATUS_IS_OK(status)) {
4289 DEBUG(10, ("open_directory: smbd_check_access_rights on "
4290 "file %s failed with %s\n",
4291 smb_fname_str_dbg(smb_dname),
4292 nt_errstr(status)));
4297 status = file_new(req, conn, &fsp);
4298 if(!NT_STATUS_IS_OK(status)) {
4303 * Setup the files_struct for it.
4306 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
4307 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
4308 fsp->file_pid = req ? req->smbpid : 0;
4309 fsp->can_lock = False;
4310 fsp->can_read = False;
4311 fsp->can_write = False;
4313 fsp->share_access = share_access;
4314 fsp->fh->private_options = 0;
4316 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
4318 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
4319 fsp->print_file = NULL;
4320 fsp->modified = False;
4321 fsp->oplock_type = NO_OPLOCK;
4322 fsp->sent_oplock_break = NO_BREAK_SENT;
4323 fsp->is_directory = True;
4324 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
4325 fsp->posix_flags |= FSP_POSIX_FLAGS_ALL;
4327 status = fsp_set_smb_fname(fsp, smb_dname);
4328 if (!NT_STATUS_IS_OK(status)) {
4329 file_free(req, fsp);
4333 /* Don't store old timestamps for directory
4334 handles in the internal database. We don't
4335 update them in there if new objects
4336 are creaded in the directory. Currently
4337 we only update timestamps on file writes.
4340 ZERO_STRUCT(mtimespec);
4342 if (access_mask & (FILE_LIST_DIRECTORY|
4344 FILE_ADD_SUBDIRECTORY|
4347 FILE_DELETE_CHILD)) {
4349 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
4351 /* POSIX allows us to open a directory with O_RDONLY. */
4352 status = fd_open(conn, fsp, O_RDONLY, 0);
4354 if (!NT_STATUS_IS_OK(status)) {
4355 DEBUG(5, ("open_directory: Could not open fd for "
4357 smb_fname_str_dbg(smb_dname),
4358 nt_errstr(status)));
4359 file_free(req, fsp);
4364 DEBUG(10, ("Not opening Directory %s\n",
4365 smb_fname_str_dbg(smb_dname)));
4368 status = vfs_stat_fsp(fsp);
4369 if (!NT_STATUS_IS_OK(status)) {
4371 file_free(req, fsp);
4375 if(!S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
4376 DEBUG(5,("open_directory: %s is not a directory !\n",
4377 smb_fname_str_dbg(smb_dname)));
4379 file_free(req, fsp);
4380 return NT_STATUS_NOT_A_DIRECTORY;
4383 /* Ensure there was no race condition. We need to check
4384 * dev/inode but not permissions, as these can change
4386 if (!check_same_dev_ino(&smb_dname->st, &fsp->fsp_name->st)) {
4387 DEBUG(5,("open_directory: stat struct differs for "
4389 smb_fname_str_dbg(smb_dname)));
4391 file_free(req, fsp);
4392 return NT_STATUS_ACCESS_DENIED;
4395 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
4396 conn->connectpath, smb_dname,
4400 DEBUG(0, ("open_directory: Could not get share mode lock for "
4401 "%s\n", smb_fname_str_dbg(smb_dname)));
4403 file_free(req, fsp);
4404 return NT_STATUS_SHARING_VIOLATION;
4407 if (has_delete_on_close(lck, fsp->name_hash)) {
4410 file_free(req, fsp);
4411 return NT_STATUS_DELETE_PENDING;
4414 status = open_mode_check(conn, lck,
4415 access_mask, share_access);
4417 if (!NT_STATUS_IS_OK(status)) {
4420 file_free(req, fsp);
4424 ok = set_share_mode(
4427 get_current_uid(conn),
4435 file_free(req, fsp);
4436 return NT_STATUS_NO_MEMORY;
4439 /* For directories the delete on close bit at open time seems
4440 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
4441 if (create_options & FILE_DELETE_ON_CLOSE) {
4442 status = can_set_delete_on_close(fsp, 0);
4443 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
4444 del_share_mode(lck, fsp);
4447 file_free(req, fsp);
4451 if (NT_STATUS_IS_OK(status)) {
4452 /* Note that here we set the *initial* delete on close flag,
4453 not the regular one. The magic gets handled in close. */
4454 fsp->initial_delete_on_close = True;
4460 * Deal with other opens having a modified write time. Is this
4461 * possible for directories?
4463 struct timespec write_time = get_share_mode_write_time(lck);
4465 if (!null_timespec(write_time)) {
4466 update_stat_ex_mtime(&fsp->fsp_name->st, write_time);
4477 return NT_STATUS_OK;
4480 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
4481 struct smb_filename *smb_dname)
4486 status = SMB_VFS_CREATE_FILE(
4489 0, /* root_dir_fid */
4490 smb_dname, /* fname */
4491 FILE_READ_ATTRIBUTES, /* access_mask */
4492 FILE_SHARE_NONE, /* share_access */
4493 FILE_CREATE, /* create_disposition*/
4494 FILE_DIRECTORY_FILE, /* create_options */
4495 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
4496 0, /* oplock_request */
4498 0, /* allocation_size */
4499 0, /* private_flags */
4504 NULL, NULL); /* create context */
4506 if (NT_STATUS_IS_OK(status)) {
4507 close_file(req, fsp, NORMAL_CLOSE);
4513 /****************************************************************************
4514 Receive notification that one of our open files has been renamed by another
4516 ****************************************************************************/
4518 void msg_file_was_renamed(struct messaging_context *msg,
4521 struct server_id server_id,
4525 char *frm = (char *)data->data;
4527 const char *sharepath;
4528 const char *base_name;
4529 const char *stream_name;
4530 struct smb_filename *smb_fname = NULL;
4531 size_t sp_len, bn_len;
4533 struct smbd_server_connection *sconn =
4534 talloc_get_type_abort(private_data,
4535 struct smbd_server_connection);
4537 if (data->data == NULL
4538 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
4539 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
4540 (int)data->length));
4544 /* Unpack the message. */
4545 pull_file_id_24(frm, &id);
4546 sharepath = &frm[24];
4547 sp_len = strlen(sharepath);
4548 base_name = sharepath + sp_len + 1;
4549 bn_len = strlen(base_name);
4550 stream_name = sharepath + sp_len + 1 + bn_len + 1;
4552 /* stream_name must always be NULL if there is no stream. */
4553 if (stream_name[0] == '\0') {
4557 smb_fname = synthetic_smb_fname(talloc_tos(),
4562 if (smb_fname == NULL) {
4566 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
4568 sharepath, smb_fname_str_dbg(smb_fname),
4569 file_id_string_tos(&id)));
4571 for(fsp = file_find_di_first(sconn, id); fsp;
4572 fsp = file_find_di_next(fsp)) {
4573 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
4575 DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
4576 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
4577 smb_fname_str_dbg(smb_fname)));
4578 status = fsp_set_smb_fname(fsp, smb_fname);
4579 if (!NT_STATUS_IS_OK(status)) {
4584 /* Now we have the complete path we can work out if this is
4585 actually within this share and adjust newname accordingly. */
4586 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
4587 "not sharepath %s) "
4588 "%s from %s -> %s\n",
4589 fsp->conn->connectpath,
4593 smb_fname_str_dbg(smb_fname)));
4597 TALLOC_FREE(smb_fname);
4602 * If a main file is opened for delete, all streams need to be checked for
4603 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
4604 * If that works, delete them all by setting the delete on close and close.
4607 static NTSTATUS open_streams_for_delete(connection_struct *conn,
4608 const struct smb_filename *smb_fname)
4610 struct stream_struct *stream_info = NULL;
4611 files_struct **streams = NULL;
4613 unsigned int num_streams = 0;
4614 TALLOC_CTX *frame = talloc_stackframe();
4617 status = vfs_streaminfo(conn, NULL, smb_fname, talloc_tos(),
4618 &num_streams, &stream_info);
4620 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
4621 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
4622 DEBUG(10, ("no streams around\n"));
4624 return NT_STATUS_OK;
4627 if (!NT_STATUS_IS_OK(status)) {
4628 DEBUG(10, ("vfs_streaminfo failed: %s\n",
4629 nt_errstr(status)));
4633 DEBUG(10, ("open_streams_for_delete found %d streams\n",
4636 if (num_streams == 0) {
4638 return NT_STATUS_OK;
4641 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
4642 if (streams == NULL) {
4643 DEBUG(0, ("talloc failed\n"));
4644 status = NT_STATUS_NO_MEMORY;
4648 for (i=0; i<num_streams; i++) {
4649 struct smb_filename *smb_fname_cp;
4651 if (strequal(stream_info[i].name, "::$DATA")) {
4656 smb_fname_cp = synthetic_smb_fname(talloc_tos(),
4657 smb_fname->base_name,
4658 stream_info[i].name,
4661 ~SMB_FILENAME_POSIX_PATH));
4662 if (smb_fname_cp == NULL) {
4663 status = NT_STATUS_NO_MEMORY;
4667 if (SMB_VFS_STAT(conn, smb_fname_cp) == -1) {
4668 DEBUG(10, ("Unable to stat stream: %s\n",
4669 smb_fname_str_dbg(smb_fname_cp)));
4672 status = SMB_VFS_CREATE_FILE(
4675 0, /* root_dir_fid */
4676 smb_fname_cp, /* fname */
4677 DELETE_ACCESS, /* access_mask */
4678 (FILE_SHARE_READ | /* share_access */
4679 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
4680 FILE_OPEN, /* create_disposition*/
4681 0, /* create_options */
4682 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
4683 0, /* oplock_request */
4685 0, /* allocation_size */
4686 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
4689 &streams[i], /* result */
4691 NULL, NULL); /* create context */
4693 if (!NT_STATUS_IS_OK(status)) {
4694 DEBUG(10, ("Could not open stream %s: %s\n",
4695 smb_fname_str_dbg(smb_fname_cp),
4696 nt_errstr(status)));
4698 TALLOC_FREE(smb_fname_cp);
4701 TALLOC_FREE(smb_fname_cp);
4705 * don't touch the variable "status" beyond this point :-)
4708 for (i -= 1 ; i >= 0; i--) {
4709 if (streams[i] == NULL) {
4713 DEBUG(10, ("Closing stream # %d, %s\n", i,
4714 fsp_str_dbg(streams[i])));
4715 close_file(NULL, streams[i], NORMAL_CLOSE);
4723 /*********************************************************************
4724 Create a default ACL by inheriting from the parent. If no inheritance
4725 from the parent available, don't set anything. This will leave the actual
4726 permissions the new file or directory already got from the filesystem
4727 as the NT ACL when read.
4728 *********************************************************************/
4730 static NTSTATUS inherit_new_acl(files_struct *fsp)
4732 TALLOC_CTX *frame = talloc_stackframe();
4733 char *parent_name = NULL;
4734 struct security_descriptor *parent_desc = NULL;
4735 NTSTATUS status = NT_STATUS_OK;
4736 struct security_descriptor *psd = NULL;
4737 const struct dom_sid *owner_sid = NULL;
4738 const struct dom_sid *group_sid = NULL;
4739 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
4740 struct security_token *token = fsp->conn->session_info->security_token;
4741 bool inherit_owner =
4742 (lp_inherit_owner(SNUM(fsp->conn)) == INHERIT_OWNER_WINDOWS_AND_UNIX);
4743 bool inheritable_components = false;
4744 bool try_builtin_administrators = false;
4745 const struct dom_sid *BA_U_sid = NULL;
4746 const struct dom_sid *BA_G_sid = NULL;
4747 bool try_system = false;
4748 const struct dom_sid *SY_U_sid = NULL;
4749 const struct dom_sid *SY_G_sid = NULL;
4751 struct smb_filename *parent_smb_fname = NULL;
4753 if (!parent_dirname(frame, fsp->fsp_name->base_name, &parent_name, NULL)) {
4755 return NT_STATUS_NO_MEMORY;
4757 parent_smb_fname = synthetic_smb_fname(talloc_tos(),
4761 fsp->fsp_name->flags);
4763 if (parent_smb_fname == NULL) {
4765 return NT_STATUS_NO_MEMORY;
4768 status = SMB_VFS_GET_NT_ACL(fsp->conn,
4770 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
4773 if (!NT_STATUS_IS_OK(status)) {
4778 inheritable_components = sd_has_inheritable_components(parent_desc,
4781 if (!inheritable_components && !inherit_owner) {
4783 /* Nothing to inherit and not setting owner. */
4784 return NT_STATUS_OK;
4787 /* Create an inherited descriptor from the parent. */
4789 if (DEBUGLEVEL >= 10) {
4790 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
4791 fsp_str_dbg(fsp) ));
4792 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
4795 /* Inherit from parent descriptor if "inherit owner" set. */
4796 if (inherit_owner) {
4797 owner_sid = parent_desc->owner_sid;
4798 group_sid = parent_desc->group_sid;
4801 if (owner_sid == NULL) {
4802 if (security_token_has_builtin_administrators(token)) {
4803 try_builtin_administrators = true;
4804 } else if (security_token_is_system(token)) {
4805 try_builtin_administrators = true;
4810 if (group_sid == NULL &&
4811 token->num_sids == PRIMARY_GROUP_SID_INDEX)
4813 if (security_token_is_system(token)) {
4814 try_builtin_administrators = true;
4819 if (try_builtin_administrators) {
4824 ok = sids_to_unixids(&global_sid_Builtin_Administrators, 1, &ids);
4828 BA_U_sid = &global_sid_Builtin_Administrators;
4829 BA_G_sid = &global_sid_Builtin_Administrators;
4832 BA_U_sid = &global_sid_Builtin_Administrators;
4835 BA_G_sid = &global_sid_Builtin_Administrators;
4848 ok = sids_to_unixids(&global_sid_System, 1, &ids);
4852 SY_U_sid = &global_sid_System;
4853 SY_G_sid = &global_sid_System;
4856 SY_U_sid = &global_sid_System;
4859 SY_G_sid = &global_sid_System;
4867 if (owner_sid == NULL) {
4868 owner_sid = BA_U_sid;
4871 if (owner_sid == NULL) {
4872 owner_sid = SY_U_sid;
4875 if (group_sid == NULL) {
4876 group_sid = SY_G_sid;
4879 if (try_system && group_sid == NULL) {
4880 group_sid = BA_G_sid;
4883 if (owner_sid == NULL) {
4884 owner_sid = &token->sids[PRIMARY_USER_SID_INDEX];
4886 if (group_sid == NULL) {
4887 if (token->num_sids == PRIMARY_GROUP_SID_INDEX) {
4888 group_sid = &token->sids[PRIMARY_USER_SID_INDEX];
4890 group_sid = &token->sids[PRIMARY_GROUP_SID_INDEX];
4894 status = se_create_child_secdesc(frame,
4901 if (!NT_STATUS_IS_OK(status)) {
4906 /* If inheritable_components == false,
4907 se_create_child_secdesc()
4908 creates a security descriptor with a NULL dacl
4909 entry, but with SEC_DESC_DACL_PRESENT. We need
4910 to remove that flag. */
4912 if (!inheritable_components) {
4913 security_info_sent &= ~SECINFO_DACL;
4914 psd->type &= ~SEC_DESC_DACL_PRESENT;
4917 if (DEBUGLEVEL >= 10) {
4918 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
4919 fsp_str_dbg(fsp) ));
4920 NDR_PRINT_DEBUG(security_descriptor, psd);
4923 if (inherit_owner) {
4924 /* We need to be root to force this. */
4927 status = SMB_VFS_FSET_NT_ACL(fsp,
4930 if (inherit_owner) {
4938 * If we already have a lease, it must match the new file id. [MS-SMB2]
4939 * 3.3.5.9.8 speaks about INVALID_PARAMETER if an already used lease key is
4940 * used for a different file name.
4943 struct lease_match_state {
4944 /* Input parameters. */
4945 TALLOC_CTX *mem_ctx;
4946 const char *servicepath;
4947 const struct smb_filename *fname;
4950 /* Return parameters. */
4951 uint32_t num_file_ids;
4952 struct file_id *ids;
4953 NTSTATUS match_status;
4956 /*************************************************************
4957 File doesn't exist but this lease key+guid is already in use.
4959 This is only allowable in the dynamic share case where the
4960 service path must be different.
4962 There is a small race condition here in the multi-connection
4963 case where a client sends two create calls on different connections,
4964 where the file doesn't exist and one smbd creates the leases_db
4965 entry first, but this will get fixed by the multichannel cleanup
4966 when all identical client_guids get handled by a single smbd.
4967 **************************************************************/
4969 static void lease_match_parser_new_file(
4971 const struct leases_db_file *files,
4972 struct lease_match_state *state)
4976 for (i = 0; i < num_files; i++) {
4977 const struct leases_db_file *f = &files[i];
4978 if (strequal(state->servicepath, f->servicepath)) {
4979 state->match_status = NT_STATUS_INVALID_PARAMETER;
4984 /* Dynamic share case. Break leases on all other files. */
4985 state->match_status = leases_db_copy_file_ids(state->mem_ctx,
4989 if (!NT_STATUS_IS_OK(state->match_status)) {
4993 state->num_file_ids = num_files;
4994 state->match_status = NT_STATUS_OPLOCK_NOT_GRANTED;
4998 static void lease_match_parser(
5000 const struct leases_db_file *files,
5003 struct lease_match_state *state =
5004 (struct lease_match_state *)private_data;
5007 if (!state->file_existed) {
5009 * Deal with name mismatch or
5010 * possible dynamic share case separately
5011 * to make code clearer.
5013 lease_match_parser_new_file(num_files,
5020 state->match_status = NT_STATUS_OK;
5022 for (i = 0; i < num_files; i++) {
5023 const struct leases_db_file *f = &files[i];
5025 /* Everything should be the same. */
5026 if (!file_id_equal(&state->id, &f->id)) {
5027 /* This should catch all dynamic share cases. */
5028 state->match_status = NT_STATUS_OPLOCK_NOT_GRANTED;
5031 if (!strequal(f->servicepath, state->servicepath)) {
5032 state->match_status = NT_STATUS_INVALID_PARAMETER;
5035 if (!strequal(f->base_name, state->fname->base_name)) {
5036 state->match_status = NT_STATUS_INVALID_PARAMETER;
5039 if (!strequal(f->stream_name, state->fname->stream_name)) {
5040 state->match_status = NT_STATUS_INVALID_PARAMETER;
5045 if (NT_STATUS_IS_OK(state->match_status)) {
5047 * Common case - just opening another handle on a
5048 * file on a non-dynamic share.
5053 if (NT_STATUS_EQUAL(state->match_status, NT_STATUS_INVALID_PARAMETER)) {
5054 /* Mismatched path. Error back to client. */
5059 * File id mismatch. Dynamic share case NT_STATUS_OPLOCK_NOT_GRANTED.
5060 * Don't allow leases.
5063 state->match_status = leases_db_copy_file_ids(state->mem_ctx,
5067 if (!NT_STATUS_IS_OK(state->match_status)) {
5071 state->num_file_ids = num_files;
5072 state->match_status = NT_STATUS_OPLOCK_NOT_GRANTED;
5076 static NTSTATUS lease_match(connection_struct *conn,
5077 struct smb_request *req,
5078 struct smb2_lease_key *lease_key,
5079 const char *servicepath,
5080 const struct smb_filename *fname,
5081 uint16_t *p_version,
5084 struct smbd_server_connection *sconn = req->sconn;
5085 TALLOC_CTX *tos = talloc_tos();
5086 struct lease_match_state state = {
5088 .servicepath = servicepath,
5090 .match_status = NT_STATUS_OK
5095 state.file_existed = VALID_STAT(fname->st);
5096 if (state.file_existed) {
5097 state.id = vfs_file_id_from_sbuf(conn, &fname->st);
5100 status = leases_db_parse(&sconn->client->connections->smb2.client.guid,
5101 lease_key, lease_match_parser, &state);
5102 if (!NT_STATUS_IS_OK(status)) {
5104 * Not found or error means okay: We can make the lease pass
5106 return NT_STATUS_OK;
5108 if (!NT_STATUS_EQUAL(state.match_status, NT_STATUS_OPLOCK_NOT_GRANTED)) {
5110 * Anything but NT_STATUS_OPLOCK_NOT_GRANTED, let the caller
5113 return state.match_status;
5116 /* We have to break all existing leases. */
5117 for (i = 0; i < state.num_file_ids; i++) {
5118 struct share_mode_lock *lck;
5119 struct share_mode_data *d;
5122 if (file_id_equal(&state.ids[i], &state.id)) {
5123 /* Don't need to break our own file. */
5127 lck = get_existing_share_mode_lock(talloc_tos(), state.ids[i]);
5129 /* Race condition - file already closed. */
5133 for (j=0; j<d->num_share_modes; j++) {
5134 struct share_mode_entry *e = &d->share_modes[j];
5135 uint32_t e_lease_type = get_lease_type(d, e);
5137 if (share_mode_stale_pid(d, j)) {
5141 if (e->op_type == LEASE_OPLOCK) {
5142 struct share_mode_lease *l = NULL;
5143 l = &lck->data->leases[e->lease_idx];
5144 if (!smb2_lease_key_equal(&e->lease_key,
5148 *p_epoch = l->epoch;
5149 *p_version = l->lease_version;
5152 if (e_lease_type == SMB2_LEASE_NONE) {
5156 send_break_message(conn->sconn->msg_ctx, &d->id, e,
5160 * Windows 7 and 8 lease clients
5161 * are broken in that they will not
5162 * respond to lease break requests
5163 * whilst waiting for an outstanding
5164 * open request on that lease handle
5165 * on the same TCP connection, due
5166 * to holding an internal inode lock.
5168 * This means we can't reschedule
5169 * ourselves here, but must return
5174 * Send the breaks and then return
5175 * SMB2_LEASE_NONE in the lease handle
5176 * to cause them to acknowledge the
5177 * lease break. Consultation with
5178 * Microsoft engineering confirmed
5179 * this approach is safe.
5186 * Ensure we don't grant anything more so we
5189 return NT_STATUS_OPLOCK_NOT_GRANTED;
5193 * Wrapper around open_file_ntcreate and open_directory
5196 static NTSTATUS create_file_unixpath(connection_struct *conn,
5197 struct smb_request *req,
5198 struct smb_filename *smb_fname,
5199 uint32_t access_mask,
5200 uint32_t share_access,
5201 uint32_t create_disposition,
5202 uint32_t create_options,
5203 uint32_t file_attributes,
5204 uint32_t oplock_request,
5205 struct smb2_lease *lease,
5206 uint64_t allocation_size,
5207 uint32_t private_flags,
5208 struct security_descriptor *sd,
5209 struct ea_list *ea_list,
5211 files_struct **result,
5214 int info = FILE_WAS_OPENED;
5215 files_struct *base_fsp = NULL;
5216 files_struct *fsp = NULL;
5219 DBG_DEBUG("create_file_unixpath: access_mask = 0x%x "
5220 "file_attributes = 0x%x, share_access = 0x%x, "
5221 "create_disposition = 0x%x create_options = 0x%x "
5222 "oplock_request = 0x%x private_flags = 0x%x "
5223 "ea_list = %p, sd = %p, "
5225 (unsigned int)access_mask,
5226 (unsigned int)file_attributes,
5227 (unsigned int)share_access,
5228 (unsigned int)create_disposition,
5229 (unsigned int)create_options,
5230 (unsigned int)oplock_request,
5231 (unsigned int)private_flags,
5232 ea_list, sd, smb_fname_str_dbg(smb_fname));
5234 if (create_options & FILE_OPEN_BY_FILE_ID) {
5235 status = NT_STATUS_NOT_SUPPORTED;
5239 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
5240 status = NT_STATUS_INVALID_PARAMETER;
5245 oplock_request |= INTERNAL_OPEN_ONLY;
5248 if (lease != NULL) {
5249 uint16_t epoch = lease->lease_epoch;
5250 uint16_t version = lease->lease_version;
5253 DBG_WARNING("Got lease on internal open\n");
5254 status = NT_STATUS_INTERNAL_ERROR;
5258 status = lease_match(conn,
5265 if (NT_STATUS_EQUAL(status, NT_STATUS_OPLOCK_NOT_GRANTED)) {
5266 /* Dynamic share file. No leases and update epoch... */
5267 lease->lease_state = SMB2_LEASE_NONE;
5268 lease->lease_epoch = epoch;
5269 lease->lease_version = version;
5270 } else if (!NT_STATUS_IS_OK(status)) {
5275 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
5276 && (access_mask & DELETE_ACCESS)
5277 && !is_ntfs_stream_smb_fname(smb_fname)) {
5279 * We can't open a file with DELETE access if any of the
5280 * streams is open without FILE_SHARE_DELETE
5282 status = open_streams_for_delete(conn, smb_fname);
5284 if (!NT_STATUS_IS_OK(status)) {
5289 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
5290 !security_token_has_privilege(get_current_nttok(conn),
5291 SEC_PRIV_SECURITY)) {
5292 DEBUG(10, ("create_file_unixpath: open on %s "
5293 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
5294 smb_fname_str_dbg(smb_fname)));
5295 status = NT_STATUS_PRIVILEGE_NOT_HELD;
5300 * Files or directories can't be opened DELETE_ON_CLOSE without
5302 * BUG: https://bugzilla.samba.org/show_bug.cgi?id=13358
5304 if (create_options & FILE_DELETE_ON_CLOSE) {
5305 if ((access_mask & DELETE_ACCESS) == 0) {
5306 status = NT_STATUS_INVALID_PARAMETER;
5311 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
5312 && is_ntfs_stream_smb_fname(smb_fname)
5313 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
5314 uint32_t base_create_disposition;
5315 struct smb_filename *smb_fname_base = NULL;
5316 uint32_t base_privflags;
5318 if (create_options & FILE_DIRECTORY_FILE) {
5319 status = NT_STATUS_NOT_A_DIRECTORY;
5323 switch (create_disposition) {
5325 base_create_disposition = FILE_OPEN;
5328 base_create_disposition = FILE_OPEN_IF;
5332 /* Create an smb_filename with stream_name == NULL. */
5333 smb_fname_base = synthetic_smb_fname(talloc_tos(),
5334 smb_fname->base_name,
5338 if (smb_fname_base == NULL) {
5339 status = NT_STATUS_NO_MEMORY;
5343 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
5344 DEBUG(10, ("Unable to stat stream: %s\n",
5345 smb_fname_str_dbg(smb_fname_base)));
5348 * https://bugzilla.samba.org/show_bug.cgi?id=10229
5349 * We need to check if the requested access mask
5350 * could be used to open the underlying file (if
5351 * it existed), as we're passing in zero for the
5352 * access mask to the base filename.
5354 status = check_base_file_access(conn,
5358 if (!NT_STATUS_IS_OK(status)) {
5359 DEBUG(10, ("Permission check "
5360 "for base %s failed: "
5361 "%s\n", smb_fname->base_name,
5362 nt_errstr(status)));
5367 base_privflags = NTCREATEX_OPTIONS_PRIVATE_STREAM_BASEOPEN;
5369 /* Open the base file. */
5370 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
5373 | FILE_SHARE_DELETE,
5374 base_create_disposition,
5379 TALLOC_FREE(smb_fname_base);
5381 if (!NT_STATUS_IS_OK(status)) {
5382 DEBUG(10, ("create_file_unixpath for base %s failed: "
5383 "%s\n", smb_fname->base_name,
5384 nt_errstr(status)));
5387 /* we don't need the low level fd */
5392 * If it's a request for a directory open, deal with it separately.
5395 if (create_options & FILE_DIRECTORY_FILE) {
5397 if (create_options & FILE_NON_DIRECTORY_FILE) {
5398 status = NT_STATUS_INVALID_PARAMETER;
5402 /* Can't open a temp directory. IFS kit test. */
5403 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
5404 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
5405 status = NT_STATUS_INVALID_PARAMETER;
5410 * We will get a create directory here if the Win32
5411 * app specified a security descriptor in the
5412 * CreateDirectory() call.
5416 status = open_directory(
5417 conn, req, smb_fname, access_mask, share_access,
5418 create_disposition, create_options, file_attributes,
5423 * Ordinary file case.
5426 status = file_new(req, conn, &fsp);
5427 if(!NT_STATUS_IS_OK(status)) {
5431 status = fsp_set_smb_fname(fsp, smb_fname);
5432 if (!NT_STATUS_IS_OK(status)) {
5438 * We're opening the stream element of a
5439 * base_fsp we already opened. Set up the
5442 fsp->base_fsp = base_fsp;
5445 if (allocation_size) {
5446 fsp->initial_allocation_size = smb_roundup(fsp->conn,
5450 status = open_file_ntcreate(conn,
5463 if(!NT_STATUS_IS_OK(status)) {
5464 file_free(req, fsp);
5468 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
5470 /* A stream open never opens a directory */
5473 status = NT_STATUS_FILE_IS_A_DIRECTORY;
5478 * Fail the open if it was explicitly a non-directory
5482 if (create_options & FILE_NON_DIRECTORY_FILE) {
5483 status = NT_STATUS_FILE_IS_A_DIRECTORY;
5488 status = open_directory(
5489 conn, req, smb_fname, access_mask,
5490 share_access, create_disposition,
5491 create_options, file_attributes,
5496 if (!NT_STATUS_IS_OK(status)) {
5500 fsp->base_fsp = base_fsp;
5502 if ((ea_list != NULL) &&
5503 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
5504 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
5505 if (!NT_STATUS_IS_OK(status)) {
5510 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
5511 status = NT_STATUS_ACCESS_DENIED;
5515 /* Save the requested allocation size. */
5516 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
5517 if ((allocation_size > fsp->fsp_name->st.st_ex_size)
5518 && !(fsp->is_directory))
5520 fsp->initial_allocation_size = smb_roundup(
5521 fsp->conn, allocation_size);
5522 if (vfs_allocate_file_space(
5523 fsp, fsp->initial_allocation_size) == -1) {
5524 status = NT_STATUS_DISK_FULL;
5528 fsp->initial_allocation_size = smb_roundup(
5529 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
5532 fsp->initial_allocation_size = 0;
5535 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
5536 fsp->base_fsp == NULL) {
5539 * According to the MS documentation, the only time the security
5540 * descriptor is applied to the opened file is iff we *created* the
5541 * file; an existing file stays the same.
5543 * Also, it seems (from observation) that you can open the file with
5544 * any access mask but you can still write the sd. We need to override
5545 * the granted access before we call set_sd
5546 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
5549 uint32_t sec_info_sent;
5550 uint32_t saved_access_mask = fsp->access_mask;
5552 sec_info_sent = get_sec_info(sd);
5554 fsp->access_mask = FILE_GENERIC_ALL;
5556 if (sec_info_sent & (SECINFO_OWNER|
5560 status = set_sd(fsp, sd, sec_info_sent);
5563 fsp->access_mask = saved_access_mask;
5565 if (!NT_STATUS_IS_OK(status)) {
5568 } else if (lp_inherit_acls(SNUM(conn))) {
5569 /* Inherit from parent. Errors here are not fatal. */
5570 status = inherit_new_acl(fsp);
5571 if (!NT_STATUS_IS_OK(status)) {
5572 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
5574 nt_errstr(status) ));
5579 if ((conn->fs_capabilities & FILE_FILE_COMPRESSION)
5580 && (create_options & FILE_NO_COMPRESSION)
5581 && (info == FILE_WAS_CREATED)) {
5582 status = SMB_VFS_SET_COMPRESSION(conn, fsp, fsp,
5583 COMPRESSION_FORMAT_NONE);
5584 if (!NT_STATUS_IS_OK(status)) {
5585 DEBUG(1, ("failed to disable compression: %s\n",
5586 nt_errstr(status)));
5590 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
5593 if (pinfo != NULL) {
5597 smb_fname->st = fsp->fsp_name->st;
5599 return NT_STATUS_OK;
5602 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
5605 if (base_fsp && fsp->base_fsp == base_fsp) {
5607 * The close_file below will close
5612 close_file(req, fsp, ERROR_CLOSE);
5615 if (base_fsp != NULL) {
5616 close_file(req, base_fsp, ERROR_CLOSE);
5623 * Calculate the full path name given a relative fid.
5625 NTSTATUS get_relative_fid_filename(connection_struct *conn,
5626 struct smb_request *req,
5627 uint16_t root_dir_fid,
5628 const struct smb_filename *smb_fname,
5629 struct smb_filename **smb_fname_out)
5631 files_struct *dir_fsp;
5632 char *parent_fname = NULL;
5633 char *new_base_name = NULL;
5634 uint32_t ucf_flags = ucf_flags_from_smb_request(req);
5637 if (root_dir_fid == 0 || !smb_fname) {
5638 status = NT_STATUS_INTERNAL_ERROR;
5642 dir_fsp = file_fsp(req, root_dir_fid);
5644 if (dir_fsp == NULL) {
5645 status = NT_STATUS_INVALID_HANDLE;
5649 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
5650 status = NT_STATUS_INVALID_HANDLE;
5654 if (!dir_fsp->is_directory) {
5657 * Check to see if this is a mac fork of some kind.
5660 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
5661 is_ntfs_stream_smb_fname(smb_fname)) {
5662 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
5667 we need to handle the case when we get a
5668 relative open relative to a file and the
5669 pathname is blank - this is a reopen!
5670 (hint from demyn plantenberg)
5673 status = NT_STATUS_INVALID_HANDLE;
5677 if (ISDOT(dir_fsp->fsp_name->base_name)) {
5679 * We're at the toplevel dir, the final file name
5680 * must not contain ./, as this is filtered out
5681 * normally by srvstr_get_path and unix_convert
5682 * explicitly rejects paths containing ./.
5684 parent_fname = talloc_strdup(talloc_tos(), "");
5685 if (parent_fname == NULL) {
5686 status = NT_STATUS_NO_MEMORY;
5690 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
5693 * Copy in the base directory name.
5696 parent_fname = talloc_array(talloc_tos(), char,
5698 if (parent_fname == NULL) {
5699 status = NT_STATUS_NO_MEMORY;
5702 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
5706 * Ensure it ends in a '/'.
5707 * We used TALLOC_SIZE +2 to add space for the '/'.
5711 && (parent_fname[dir_name_len-1] != '\\')
5712 && (parent_fname[dir_name_len-1] != '/')) {
5713 parent_fname[dir_name_len] = '/';
5714 parent_fname[dir_name_len+1] = '\0';
5718 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
5719 smb_fname->base_name);
5720 if (new_base_name == NULL) {
5721 status = NT_STATUS_NO_MEMORY;
5725 status = filename_convert(req,
5732 if (!NT_STATUS_IS_OK(status)) {
5737 TALLOC_FREE(parent_fname);
5738 TALLOC_FREE(new_base_name);
5742 NTSTATUS create_file_default(connection_struct *conn,
5743 struct smb_request *req,
5744 uint16_t root_dir_fid,
5745 struct smb_filename *smb_fname,
5746 uint32_t access_mask,
5747 uint32_t share_access,
5748 uint32_t create_disposition,
5749 uint32_t create_options,
5750 uint32_t file_attributes,
5751 uint32_t oplock_request,
5752 struct smb2_lease *lease,
5753 uint64_t allocation_size,
5754 uint32_t private_flags,
5755 struct security_descriptor *sd,
5756 struct ea_list *ea_list,
5757 files_struct **result,
5759 const struct smb2_create_blobs *in_context_blobs,
5760 struct smb2_create_blobs *out_context_blobs)
5762 int info = FILE_WAS_OPENED;
5763 files_struct *fsp = NULL;
5765 bool stream_name = false;
5767 DBG_DEBUG("create_file: access_mask = 0x%x "
5768 "file_attributes = 0x%x, share_access = 0x%x, "
5769 "create_disposition = 0x%x create_options = 0x%x "
5770 "oplock_request = 0x%x "
5771 "private_flags = 0x%x "
5772 "root_dir_fid = 0x%x, ea_list = %p, sd = %p, "
5774 (unsigned int)access_mask,
5775 (unsigned int)file_attributes,
5776 (unsigned int)share_access,
5777 (unsigned int)create_disposition,
5778 (unsigned int)create_options,
5779 (unsigned int)oplock_request,
5780 (unsigned int)private_flags,
5781 (unsigned int)root_dir_fid,
5782 ea_list, sd, smb_fname_str_dbg(smb_fname));
5785 * Calculate the filename from the root_dir_if if necessary.
5788 if (root_dir_fid != 0) {
5789 struct smb_filename *smb_fname_out = NULL;
5790 status = get_relative_fid_filename(conn, req, root_dir_fid,
5791 smb_fname, &smb_fname_out);
5792 if (!NT_STATUS_IS_OK(status)) {
5795 smb_fname = smb_fname_out;
5799 * Check to see if this is a mac fork of some kind.
5802 stream_name = is_ntfs_stream_smb_fname(smb_fname);
5804 enum FAKE_FILE_TYPE fake_file_type;
5806 fake_file_type = is_fake_file(smb_fname);
5808 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
5811 * Here we go! support for changing the disk quotas
5814 * We need to fake up to open this MAGIC QUOTA file
5815 * and return a valid FID.
5817 * w2k close this file directly after openening xp
5818 * also tries a QUERY_FILE_INFO on the file and then
5821 status = open_fake_file(req, conn, req->vuid,
5822 fake_file_type, smb_fname,
5824 if (!NT_STATUS_IS_OK(status)) {
5828 ZERO_STRUCT(smb_fname->st);
5832 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
5833 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
5838 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
5840 smb_fname->stream_name = NULL;
5841 /* We have to handle this error here. */
5842 if (create_options & FILE_DIRECTORY_FILE) {
5843 status = NT_STATUS_NOT_A_DIRECTORY;
5846 if (req != NULL && req->posix_pathnames) {
5847 ret = SMB_VFS_LSTAT(conn, smb_fname);
5849 ret = SMB_VFS_STAT(conn, smb_fname);
5852 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
5853 status = NT_STATUS_FILE_IS_A_DIRECTORY;
5858 status = create_file_unixpath(
5859 conn, req, smb_fname, access_mask, share_access,
5860 create_disposition, create_options, file_attributes,
5861 oplock_request, lease, allocation_size, private_flags,
5865 if (!NT_STATUS_IS_OK(status)) {
5870 DEBUG(10, ("create_file: info=%d\n", info));
5873 if (pinfo != NULL) {
5876 return NT_STATUS_OK;
5879 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
5882 close_file(req, fsp, ERROR_CLOSE);