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 struct fsp_lease *find_fsp_lease(struct files_struct *new_fsp,
1995 const struct smb2_lease_key *key,
1996 uint32_t current_state,
1997 uint16_t lease_version,
1998 uint16_t lease_epoch)
2000 struct files_struct *fsp;
2003 * TODO: Measure how expensive this loop is with thousands of open
2007 for (fsp = file_find_di_first(new_fsp->conn->sconn, new_fsp->file_id);
2009 fsp = file_find_di_next(fsp)) {
2011 if (fsp == new_fsp) {
2014 if (fsp->oplock_type != LEASE_OPLOCK) {
2017 if (smb2_lease_key_equal(&fsp->lease->lease.lease_key, key)) {
2018 fsp->lease->ref_count += 1;
2023 /* Not found - must be leased in another smbd. */
2024 new_fsp->lease = talloc_zero(new_fsp->conn->sconn, struct fsp_lease);
2025 if (new_fsp->lease == NULL) {
2028 new_fsp->lease->ref_count = 1;
2029 new_fsp->lease->sconn = new_fsp->conn->sconn;
2030 new_fsp->lease->lease.lease_key = *key;
2031 new_fsp->lease->lease.lease_state = current_state;
2033 * We internally treat all leases as V2 and update
2034 * the epoch, but when sending breaks it matters if
2035 * the requesting lease was v1 or v2.
2037 new_fsp->lease->lease.lease_version = lease_version;
2038 new_fsp->lease->lease.lease_epoch = lease_epoch;
2039 return new_fsp->lease;
2042 static NTSTATUS grant_fsp_lease(struct files_struct *fsp,
2043 struct share_mode_lock *lck,
2044 const struct smb2_lease *lease,
2045 uint32_t *p_lease_idx,
2048 struct share_mode_data *d = lck->data;
2049 const struct GUID *client_guid = fsp_client_guid(fsp);
2050 struct share_mode_lease *tmp;
2054 idx = find_share_mode_lease(d, client_guid, &lease->lease_key);
2057 struct share_mode_lease *l = &d->leases[idx];
2059 uint32_t existing, requested;
2061 fsp->lease = find_fsp_lease(
2067 if (fsp->lease == NULL) {
2068 DEBUG(1, ("Did not find existing lease for file %s\n",
2070 return NT_STATUS_NO_MEMORY;
2076 * Upgrade only if the requested lease is a strict upgrade.
2078 existing = l->current_state;
2079 requested = lease->lease_state;
2082 * Tricky: This test makes sure that "requested" is a
2083 * strict bitwise superset of "existing".
2085 do_upgrade = ((existing & requested) == existing);
2088 * Upgrade only if there's a change.
2090 do_upgrade &= (granted != existing);
2093 * Upgrade only if other leases don't prevent what was asked
2096 do_upgrade &= (granted == requested);
2099 * only upgrade if we are not in breaking state
2101 do_upgrade &= !l->breaking;
2103 DEBUG(10, ("existing=%"PRIu32", requested=%"PRIu32", "
2104 "granted=%"PRIu32", do_upgrade=%d\n",
2105 existing, requested, granted, (int)do_upgrade));
2108 l->current_state = granted;
2113 NTSTATUS set_status;
2115 set_status = leases_db_set(
2120 l->breaking_to_requested,
2121 l->breaking_to_required,
2125 if (!NT_STATUS_IS_OK(set_status)) {
2126 DBG_DEBUG("leases_db_set failed: %s\n",
2127 nt_errstr(set_status));
2132 /* Ensure we're in sync with current lease state. */
2133 fsp_lease_update(lck, fsp_client_guid(fsp), fsp->lease);
2134 return NT_STATUS_OK;
2141 tmp = talloc_realloc(d, d->leases, struct share_mode_lease,
2147 return NT_STATUS_INSUFFICIENT_RESOURCES;
2151 fsp->lease = talloc_zero(fsp->conn->sconn, struct fsp_lease);
2152 if (fsp->lease == NULL) {
2153 return NT_STATUS_INSUFFICIENT_RESOURCES;
2155 fsp->lease->ref_count = 1;
2156 fsp->lease->sconn = fsp->conn->sconn;
2157 fsp->lease->lease.lease_version = lease->lease_version;
2158 fsp->lease->lease.lease_key = lease->lease_key;
2159 fsp->lease->lease.lease_state = granted;
2160 fsp->lease->lease.lease_epoch = lease->lease_epoch + 1;
2162 *p_lease_idx = d->num_leases;
2164 d->leases[d->num_leases] = (struct share_mode_lease) {
2165 .client_guid = *client_guid,
2166 .lease_key = fsp->lease->lease.lease_key,
2167 .current_state = fsp->lease->lease.lease_state,
2168 .lease_version = fsp->lease->lease.lease_version,
2169 .epoch = fsp->lease->lease.lease_epoch,
2172 status = leases_db_add(client_guid,
2175 fsp->lease->lease.lease_state,
2176 fsp->lease->lease.lease_version,
2177 fsp->lease->lease.lease_epoch,
2178 fsp->conn->connectpath,
2179 fsp->fsp_name->base_name,
2180 fsp->fsp_name->stream_name);
2181 if (!NT_STATUS_IS_OK(status)) {
2182 DEBUG(10, ("%s: leases_db_add failed: %s\n", __func__,
2183 nt_errstr(status)));
2184 TALLOC_FREE(fsp->lease);
2185 return NT_STATUS_INSUFFICIENT_RESOURCES;
2191 return NT_STATUS_OK;
2194 static bool is_same_lease(const files_struct *fsp,
2195 const struct share_mode_data *d,
2196 const struct share_mode_entry *e,
2197 const struct smb2_lease *lease)
2199 if (e->op_type != LEASE_OPLOCK) {
2202 if (lease == NULL) {
2206 return smb2_lease_equal(fsp_client_guid(fsp),
2212 static int map_lease_type_to_oplock(uint32_t lease_type)
2214 int result = NO_OPLOCK;
2216 switch (lease_type) {
2217 case SMB2_LEASE_READ|SMB2_LEASE_WRITE|SMB2_LEASE_HANDLE:
2218 result = BATCH_OPLOCK|EXCLUSIVE_OPLOCK;
2220 case SMB2_LEASE_READ|SMB2_LEASE_WRITE:
2221 result = EXCLUSIVE_OPLOCK;
2223 case SMB2_LEASE_READ|SMB2_LEASE_HANDLE:
2224 case SMB2_LEASE_READ:
2225 result = LEVEL_II_OPLOCK;
2232 static NTSTATUS grant_fsp_oplock_type(struct smb_request *req,
2233 struct files_struct *fsp,
2234 struct share_mode_lock *lck,
2236 struct smb2_lease *lease)
2238 struct share_mode_data *d = lck->data;
2239 bool got_handle_lease = false;
2240 bool got_oplock = false;
2243 uint32_t lease_idx = UINT32_MAX;
2247 if (oplock_request & INTERNAL_OPEN_ONLY) {
2248 /* No oplocks on internal open. */
2249 oplock_request = NO_OPLOCK;
2250 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
2251 fsp->oplock_type, fsp_str_dbg(fsp)));
2254 if (oplock_request == LEASE_OPLOCK) {
2255 if (lease == NULL) {
2257 * The SMB2 layer should have checked this
2259 return NT_STATUS_INTERNAL_ERROR;
2262 granted = lease->lease_state;
2264 if (lp_kernel_oplocks(SNUM(fsp->conn))) {
2265 DEBUG(10, ("No lease granted because kernel oplocks are enabled\n"));
2266 granted = SMB2_LEASE_NONE;
2268 if ((granted & (SMB2_LEASE_READ|SMB2_LEASE_WRITE)) == 0) {
2269 DEBUG(10, ("No read or write lease requested\n"));
2270 granted = SMB2_LEASE_NONE;
2272 if (granted == SMB2_LEASE_WRITE) {
2273 DEBUG(10, ("pure write lease requested\n"));
2274 granted = SMB2_LEASE_NONE;
2276 if (granted == (SMB2_LEASE_WRITE|SMB2_LEASE_HANDLE)) {
2277 DEBUG(10, ("write and handle lease requested\n"));
2278 granted = SMB2_LEASE_NONE;
2281 granted = map_oplock_to_lease_type(
2282 oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
2285 if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
2286 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
2288 granted &= ~SMB2_LEASE_READ;
2291 for (i=0; i<d->num_share_modes; i++) {
2292 struct share_mode_entry *e = &d->share_modes[i];
2293 uint32_t e_lease_type;
2295 e_lease_type = get_lease_type(d, e);
2297 if ((granted & SMB2_LEASE_WRITE) &&
2298 !is_same_lease(fsp, d, e, lease) &&
2299 !share_mode_stale_pid(d, i)) {
2301 * Can grant only one writer
2303 granted &= ~SMB2_LEASE_WRITE;
2306 if ((e_lease_type & SMB2_LEASE_HANDLE) && !got_handle_lease &&
2307 !share_mode_stale_pid(d, i)) {
2308 got_handle_lease = true;
2311 if ((e->op_type != LEASE_OPLOCK) && !got_oplock &&
2312 !share_mode_stale_pid(d, i)) {
2317 if ((granted & SMB2_LEASE_READ) && !(granted & SMB2_LEASE_WRITE)) {
2319 (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
2320 lp_level2_oplocks(SNUM(fsp->conn));
2322 if (!allow_level2) {
2323 granted = SMB2_LEASE_NONE;
2327 if (oplock_request == LEASE_OPLOCK) {
2329 granted &= ~SMB2_LEASE_HANDLE;
2332 fsp->oplock_type = LEASE_OPLOCK;
2334 status = grant_fsp_lease(fsp, lck, lease, &lease_idx,
2336 if (!NT_STATUS_IS_OK(status)) {
2340 *lease = fsp->lease->lease;
2341 DEBUG(10, ("lease_state=%d\n", lease->lease_state));
2343 if (got_handle_lease) {
2344 granted = SMB2_LEASE_NONE;
2347 fsp->oplock_type = map_lease_type_to_oplock(granted);
2349 status = set_file_oplock(fsp);
2350 if (!NT_STATUS_IS_OK(status)) {
2352 * Could not get the kernel oplock
2354 fsp->oplock_type = NO_OPLOCK;
2358 ok = set_share_mode(lck, fsp, get_current_uid(fsp->conn),
2363 return NT_STATUS_NO_MEMORY;
2366 ok = update_num_read_oplocks(fsp, lck);
2368 del_share_mode(lck, fsp);
2369 return NT_STATUS_INTERNAL_ERROR;
2372 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
2373 fsp->oplock_type, fsp_str_dbg(fsp)));
2375 return NT_STATUS_OK;
2378 static bool request_timed_out(struct timeval request_time,
2379 struct timeval timeout)
2381 struct timeval now, end_time;
2383 end_time = timeval_sum(&request_time, &timeout);
2384 return (timeval_compare(&end_time, &now) < 0);
2387 static struct deferred_open_record *deferred_open_record_create(
2388 bool delayed_for_oplocks,
2392 struct deferred_open_record *record = NULL;
2394 record = talloc(NULL, struct deferred_open_record);
2395 if (record == NULL) {
2399 *record = (struct deferred_open_record) {
2400 .delayed_for_oplocks = delayed_for_oplocks,
2401 .async_open = async_open,
2408 struct defer_open_state {
2409 struct smbXsrv_connection *xconn;
2413 static void defer_open_done(struct tevent_req *req);
2416 * Defer an open and watch a locking.tdb record
2418 * This defers an open that gets rescheduled once the locking.tdb record watch
2419 * is triggered by a change to the record.
2421 * It is used to defer opens that triggered an oplock break and for the SMB1
2422 * sharing violation delay.
2424 static void defer_open(struct share_mode_lock *lck,
2425 struct timeval request_time,
2426 struct timeval timeout,
2427 struct smb_request *req,
2428 bool delayed_for_oplocks,
2431 struct deferred_open_record *open_rec = NULL;
2432 struct timeval abs_timeout;
2433 struct defer_open_state *watch_state;
2434 struct tevent_req *watch_req;
2437 abs_timeout = timeval_sum(&request_time, &timeout);
2439 DBG_DEBUG("request time [%s] timeout [%s] mid [%" PRIu64 "] "
2440 "delayed_for_oplocks [%s] file_id [%s]\n",
2441 timeval_string(talloc_tos(), &request_time, false),
2442 timeval_string(talloc_tos(), &abs_timeout, false),
2444 delayed_for_oplocks ? "yes" : "no",
2445 file_id_string_tos(&id));
2447 open_rec = deferred_open_record_create(delayed_for_oplocks,
2450 if (open_rec == NULL) {
2452 exit_server("talloc failed");
2455 watch_state = talloc(open_rec, struct defer_open_state);
2456 if (watch_state == NULL) {
2457 exit_server("talloc failed");
2459 watch_state->xconn = req->xconn;
2460 watch_state->mid = req->mid;
2462 DBG_DEBUG("defering mid %" PRIu64 "\n", req->mid);
2464 watch_req = dbwrap_watched_watch_send(watch_state,
2467 (struct server_id){0});
2468 if (watch_req == NULL) {
2469 exit_server("Could not watch share mode record");
2471 tevent_req_set_callback(watch_req, defer_open_done, watch_state);
2473 ok = tevent_req_set_endtime(watch_req, req->sconn->ev_ctx, abs_timeout);
2475 exit_server("tevent_req_set_endtime failed");
2478 ok = push_deferred_open_message_smb(req, request_time, timeout,
2479 open_rec->id, open_rec);
2482 exit_server("push_deferred_open_message_smb failed");
2486 static void defer_open_done(struct tevent_req *req)
2488 struct defer_open_state *state = tevent_req_callback_data(
2489 req, struct defer_open_state);
2493 status = dbwrap_watched_watch_recv(req, NULL, NULL);
2495 if (!NT_STATUS_IS_OK(status)) {
2496 DEBUG(5, ("dbwrap_watched_watch_recv returned %s\n",
2497 nt_errstr(status)));
2499 * Even if it failed, retry anyway. TODO: We need a way to
2500 * tell a re-scheduled open about that error.
2504 DEBUG(10, ("scheduling mid %llu\n", (unsigned long long)state->mid));
2506 ret = schedule_deferred_open_message_smb(state->xconn, state->mid);
2512 * Actually attempt the kernel oplock polling open.
2515 static void kernel_oplock_poll_open_timer(struct tevent_context *ev,
2516 struct tevent_timer *te,
2517 struct timeval current_time,
2521 struct smb_request *req = (struct smb_request *)private_data;
2523 ok = schedule_deferred_open_message_smb(req->xconn, req->mid);
2525 exit_server("schedule_deferred_open_message_smb failed");
2527 DBG_DEBUG("kernel_oplock_poll_open_timer fired. Retying open !\n");
2531 * Reschedule an open for 1 second from now, if not timed out.
2533 static void setup_kernel_oplock_poll_open(struct timeval request_time,
2534 struct smb_request *req,
2539 struct deferred_open_record *open_rec = NULL;
2540 /* Maximum wait time. */
2541 struct timeval timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
2543 if (request_timed_out(request_time, timeout)) {
2547 open_rec = deferred_open_record_create(false, false, id);
2548 if (open_rec == NULL) {
2549 exit_server("talloc failed");
2552 ok = push_deferred_open_message_smb(req,
2558 exit_server("push_deferred_open_message_smb failed");
2562 * As this timer event is owned by req, it will
2563 * disappear if req it talloc_freed.
2565 open_rec->te = tevent_add_timer(req->sconn->ev_ctx,
2567 timeval_current_ofs(1, 0),
2568 kernel_oplock_poll_open_timer,
2570 if (open_rec->te == NULL) {
2571 exit_server("tevent_add_timer failed");
2574 DBG_DEBUG("poll request time [%s] mid [%" PRIu64 "] file_id [%s]\n",
2575 timeval_string(talloc_tos(), &request_time, false),
2577 file_id_string_tos(&id));
2580 /****************************************************************************
2581 On overwrite open ensure that the attributes match.
2582 ****************************************************************************/
2584 static bool open_match_attributes(connection_struct *conn,
2585 uint32_t old_dos_attr,
2586 uint32_t new_dos_attr,
2587 mode_t new_unx_mode,
2588 mode_t *returned_unx_mode)
2590 uint32_t noarch_old_dos_attr, noarch_new_dos_attr;
2592 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
2593 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
2595 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
2596 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
2597 *returned_unx_mode = new_unx_mode;
2599 *returned_unx_mode = (mode_t)0;
2602 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
2603 "new_dos_attr = 0x%x "
2604 "returned_unx_mode = 0%o\n",
2605 (unsigned int)old_dos_attr,
2606 (unsigned int)new_dos_attr,
2607 (unsigned int)*returned_unx_mode ));
2609 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
2610 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
2611 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
2612 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
2616 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
2617 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
2618 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
2625 /****************************************************************************
2626 Special FCB or DOS processing in the case of a sharing violation.
2627 Try and find a duplicated file handle.
2628 ****************************************************************************/
2630 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
2631 connection_struct *conn,
2632 files_struct *fsp_to_dup_into,
2633 const struct smb_filename *smb_fname,
2637 uint32_t access_mask,
2638 uint32_t share_access,
2639 uint32_t create_options)
2643 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
2644 "file %s.\n", smb_fname_str_dbg(smb_fname)));
2646 for(fsp = file_find_di_first(conn->sconn, id); fsp;
2647 fsp = file_find_di_next(fsp)) {
2649 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
2650 "vuid = %llu, file_pid = %u, private_options = 0x%x "
2651 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
2652 fsp->fh->fd, (unsigned long long)fsp->vuid,
2653 (unsigned int)fsp->file_pid,
2654 (unsigned int)fsp->fh->private_options,
2655 (unsigned int)fsp->access_mask ));
2657 if (fsp != fsp_to_dup_into &&
2658 fsp->fh->fd != -1 &&
2659 fsp->vuid == vuid &&
2660 fsp->file_pid == file_pid &&
2661 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
2662 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
2663 (fsp->access_mask & FILE_WRITE_DATA) &&
2664 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
2665 strequal(fsp->fsp_name->stream_name,
2666 smb_fname->stream_name)) {
2667 DEBUG(10,("fcb_or_dos_open: file match\n"));
2673 return NT_STATUS_NOT_FOUND;
2676 /* quite an insane set of semantics ... */
2677 if (is_executable(smb_fname->base_name) &&
2678 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
2679 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
2680 return NT_STATUS_INVALID_PARAMETER;
2683 /* We need to duplicate this fsp. */
2684 return dup_file_fsp(req, fsp, access_mask, share_access,
2685 create_options, fsp_to_dup_into);
2688 static void schedule_defer_open(struct share_mode_lock *lck,
2690 struct timeval request_time,
2691 struct smb_request *req)
2693 /* This is a relative time, added to the absolute
2694 request_time value to get the absolute timeout time.
2695 Note that if this is the second or greater time we enter
2696 this codepath for this particular request mid then
2697 request_time is left as the absolute time of the *first*
2698 time this request mid was processed. This is what allows
2699 the request to eventually time out. */
2701 struct timeval timeout;
2703 /* Normally the smbd we asked should respond within
2704 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
2705 * the client did, give twice the timeout as a safety
2706 * measure here in case the other smbd is stuck
2707 * somewhere else. */
2709 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
2711 if (request_timed_out(request_time, timeout)) {
2715 defer_open(lck, request_time, timeout, req, true, id);
2718 /****************************************************************************
2719 Reschedule an open call that went asynchronous.
2720 ****************************************************************************/
2722 static void schedule_async_open_timer(struct tevent_context *ev,
2723 struct tevent_timer *te,
2724 struct timeval current_time,
2727 exit_server("async open timeout");
2730 static void schedule_async_open(struct timeval request_time,
2731 struct smb_request *req)
2733 struct deferred_open_record *open_rec = NULL;
2734 struct timeval timeout = timeval_set(20, 0);
2737 if (request_timed_out(request_time, timeout)) {
2741 open_rec = deferred_open_record_create(false, true, (struct file_id){0});
2742 if (open_rec == NULL) {
2743 exit_server("deferred_open_record_create failed");
2746 ok = push_deferred_open_message_smb(req, request_time, timeout,
2747 (struct file_id){0}, open_rec);
2749 exit_server("push_deferred_open_message_smb failed");
2752 open_rec->te = tevent_add_timer(req->sconn->ev_ctx,
2754 timeval_current_ofs(20, 0),
2755 schedule_async_open_timer,
2757 if (open_rec->te == NULL) {
2758 exit_server("tevent_add_timer failed");
2762 /****************************************************************************
2763 Work out what access_mask to use from what the client sent us.
2764 ****************************************************************************/
2766 static NTSTATUS smbd_calculate_maximum_allowed_access(
2767 connection_struct *conn,
2768 const struct smb_filename *smb_fname,
2770 uint32_t *p_access_mask)
2772 struct security_descriptor *sd;
2773 uint32_t access_granted;
2776 if (!use_privs && (get_current_uid(conn) == (uid_t)0)) {
2777 *p_access_mask |= FILE_GENERIC_ALL;
2778 return NT_STATUS_OK;
2781 status = SMB_VFS_GET_NT_ACL(conn, smb_fname,
2787 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2789 * File did not exist
2791 *p_access_mask = FILE_GENERIC_ALL;
2792 return NT_STATUS_OK;
2794 if (!NT_STATUS_IS_OK(status)) {
2795 DEBUG(10,("Could not get acl on file %s: %s\n",
2796 smb_fname_str_dbg(smb_fname),
2797 nt_errstr(status)));
2798 return NT_STATUS_ACCESS_DENIED;
2802 * If we can access the path to this file, by
2803 * default we have FILE_READ_ATTRIBUTES from the
2804 * containing directory. See the section:
2805 * "Algorithm to Check Access to an Existing File"
2808 * se_file_access_check()
2809 * also takes care of owner WRITE_DAC and READ_CONTROL.
2811 status = se_file_access_check(sd,
2812 get_current_nttok(conn),
2814 (*p_access_mask & ~FILE_READ_ATTRIBUTES),
2819 if (!NT_STATUS_IS_OK(status)) {
2820 DEBUG(10, ("Access denied on file %s: "
2821 "when calculating maximum access\n",
2822 smb_fname_str_dbg(smb_fname)));
2823 return NT_STATUS_ACCESS_DENIED;
2825 *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
2827 if (!(access_granted & DELETE_ACCESS)) {
2828 if (can_delete_file_in_directory(conn, smb_fname)) {
2829 *p_access_mask |= DELETE_ACCESS;
2833 return NT_STATUS_OK;
2836 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
2837 const struct smb_filename *smb_fname,
2839 uint32_t access_mask,
2840 uint32_t *access_mask_out)
2843 uint32_t orig_access_mask = access_mask;
2844 uint32_t rejected_share_access;
2846 if (access_mask & SEC_MASK_INVALID) {
2847 DBG_DEBUG("access_mask [%8x] contains invalid bits\n",
2849 return NT_STATUS_ACCESS_DENIED;
2853 * Convert GENERIC bits to specific bits.
2856 se_map_generic(&access_mask, &file_generic_mapping);
2858 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
2859 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
2861 status = smbd_calculate_maximum_allowed_access(
2862 conn, smb_fname, use_privs, &access_mask);
2864 if (!NT_STATUS_IS_OK(status)) {
2868 access_mask &= conn->share_access;
2871 rejected_share_access = access_mask & ~(conn->share_access);
2873 if (rejected_share_access) {
2874 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
2875 "file %s: rejected by share access mask[0x%08X] "
2876 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
2877 smb_fname_str_dbg(smb_fname),
2879 orig_access_mask, access_mask,
2880 rejected_share_access));
2881 return NT_STATUS_ACCESS_DENIED;
2884 *access_mask_out = access_mask;
2885 return NT_STATUS_OK;
2888 /****************************************************************************
2889 Remove the deferred open entry under lock.
2890 ****************************************************************************/
2892 /****************************************************************************
2893 Return true if this is a state pointer to an asynchronous create.
2894 ****************************************************************************/
2896 bool is_deferred_open_async(const struct deferred_open_record *rec)
2898 return rec->async_open;
2901 static bool clear_ads(uint32_t create_disposition)
2905 switch (create_disposition) {
2906 case FILE_SUPERSEDE:
2907 case FILE_OVERWRITE_IF:
2908 case FILE_OVERWRITE:
2917 static int disposition_to_open_flags(uint32_t create_disposition)
2922 * Currently we're using FILE_SUPERSEDE as the same as
2923 * FILE_OVERWRITE_IF but they really are
2924 * different. FILE_SUPERSEDE deletes an existing file
2925 * (requiring delete access) then recreates it.
2928 switch (create_disposition) {
2929 case FILE_SUPERSEDE:
2930 case FILE_OVERWRITE_IF:
2932 * If file exists replace/overwrite. If file doesn't
2935 ret = O_CREAT|O_TRUNC;
2940 * If file exists open. If file doesn't exist error.
2945 case FILE_OVERWRITE:
2947 * If file exists overwrite. If file doesn't exist
2955 * If file exists error. If file doesn't exist create.
2957 ret = O_CREAT|O_EXCL;
2962 * If file exists open. If file doesn't exist create.
2970 static int calculate_open_access_flags(uint32_t access_mask,
2971 uint32_t private_flags)
2973 bool need_write, need_read;
2976 * Note that we ignore the append flag as append does not
2977 * mean the same thing under DOS and Unix.
2980 need_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA));
2985 /* DENY_DOS opens are always underlying read-write on the
2986 file handle, no matter what the requested access mask
2990 ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
2991 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|
2992 FILE_READ_EA|FILE_EXECUTE));
3000 /****************************************************************************
3001 Open a file with a share mode. Passed in an already created files_struct *.
3002 ****************************************************************************/
3004 static NTSTATUS open_file_ntcreate(connection_struct *conn,
3005 struct smb_request *req,
3006 uint32_t access_mask, /* access bits (FILE_READ_DATA etc.) */
3007 uint32_t share_access, /* share constants (FILE_SHARE_READ etc) */
3008 uint32_t create_disposition, /* FILE_OPEN_IF etc. */
3009 uint32_t create_options, /* options such as delete on close. */
3010 uint32_t new_dos_attributes, /* attributes used for new file. */
3011 int oplock_request, /* internal Samba oplock codes. */
3012 struct smb2_lease *lease,
3013 /* Information (FILE_EXISTS etc.) */
3014 uint32_t private_flags, /* Samba specific flags. */
3018 struct smb_filename *smb_fname = fsp->fsp_name;
3021 bool file_existed = VALID_STAT(smb_fname->st);
3022 bool def_acl = False;
3023 bool posix_open = False;
3024 bool new_file_created = False;
3025 bool first_open_attempt = true;
3026 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
3027 mode_t new_unx_mode = (mode_t)0;
3028 mode_t unx_mode = (mode_t)0;
3030 uint32_t existing_dos_attributes = 0;
3031 struct timeval request_time = timeval_zero();
3032 struct share_mode_lock *lck = NULL;
3033 uint32_t open_access_mask = access_mask;
3036 SMB_STRUCT_STAT saved_stat = smb_fname->st;
3037 struct timespec old_write_time;
3040 if (conn->printer) {
3042 * Printers are handled completely differently.
3043 * Most of the passed parameters are ignored.
3047 *pinfo = FILE_WAS_CREATED;
3050 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
3051 smb_fname_str_dbg(smb_fname)));
3054 DEBUG(0,("open_file_ntcreate: printer open without "
3055 "an SMB request!\n"));
3056 return NT_STATUS_INTERNAL_ERROR;
3059 return print_spool_open(fsp, smb_fname->base_name,
3063 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
3065 return NT_STATUS_NO_MEMORY;
3068 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3070 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
3071 new_dos_attributes = 0;
3073 /* Windows allows a new file to be created and
3074 silently removes a FILE_ATTRIBUTE_DIRECTORY
3075 sent by the client. Do the same. */
3077 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
3079 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
3081 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
3082 smb_fname, parent_dir);
3085 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
3086 "access_mask=0x%x share_access=0x%x "
3087 "create_disposition = 0x%x create_options=0x%x "
3088 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
3089 smb_fname_str_dbg(smb_fname), new_dos_attributes,
3090 access_mask, share_access, create_disposition,
3091 create_options, (unsigned int)unx_mode, oplock_request,
3092 (unsigned int)private_flags));
3095 /* Ensure req == NULL means INTERNAL_OPEN_ONLY */
3096 SMB_ASSERT(((oplock_request & INTERNAL_OPEN_ONLY) != 0));
3098 /* And req != NULL means no INTERNAL_OPEN_ONLY */
3099 SMB_ASSERT(((oplock_request & INTERNAL_OPEN_ONLY) == 0));
3103 * Only non-internal opens can be deferred at all
3107 struct deferred_open_record *open_rec;
3108 if (get_deferred_open_message_state(req,
3111 /* Remember the absolute time of the original
3112 request with this mid. We'll use it later to
3113 see if this has timed out. */
3115 /* If it was an async create retry, the file
3118 if (is_deferred_open_async(open_rec)) {
3119 SET_STAT_INVALID(smb_fname->st);
3120 file_existed = false;
3123 /* Ensure we don't reprocess this message. */
3124 remove_deferred_open_message_smb(req->xconn, req->mid);
3126 first_open_attempt = false;
3131 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
3134 * Only use strored DOS attributes for checks
3135 * against requested attributes (below via
3136 * open_match_attributes()), cf bug #11992
3137 * for details. -slow
3141 status = SMB_VFS_GET_DOS_ATTRIBUTES(conn, smb_fname, &attr);
3142 if (NT_STATUS_IS_OK(status)) {
3143 existing_dos_attributes = attr;
3148 /* ignore any oplock requests if oplocks are disabled */
3149 if (!lp_oplocks(SNUM(conn)) ||
3150 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
3151 /* Mask off everything except the private Samba bits. */
3152 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
3155 /* this is for OS/2 long file names - say we don't support them */
3156 if (req != NULL && !req->posix_pathnames &&
3157 strstr(smb_fname->base_name,".+,;=[].")) {
3158 /* OS/2 Workplace shell fix may be main code stream in a later
3160 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
3162 if (use_nt_status()) {
3163 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
3165 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
3168 switch( create_disposition ) {
3170 /* If file exists open. If file doesn't exist error. */
3171 if (!file_existed) {
3172 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
3173 "requested for file %s and file "
3175 smb_fname_str_dbg(smb_fname)));
3177 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
3181 case FILE_OVERWRITE:
3182 /* If file exists overwrite. If file doesn't exist
3184 if (!file_existed) {
3185 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
3186 "requested for file %s and file "
3188 smb_fname_str_dbg(smb_fname) ));
3190 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
3195 /* If file exists error. If file doesn't exist
3198 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
3199 "requested for file %s and file "
3200 "already exists.\n",
3201 smb_fname_str_dbg(smb_fname)));
3202 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
3207 return map_nt_error_from_unix(errno);
3211 case FILE_SUPERSEDE:
3212 case FILE_OVERWRITE_IF:
3216 return NT_STATUS_INVALID_PARAMETER;
3219 flags2 = disposition_to_open_flags(create_disposition);
3221 /* We only care about matching attributes on file exists and
3224 if (!posix_open && file_existed &&
3225 ((create_disposition == FILE_OVERWRITE) ||
3226 (create_disposition == FILE_OVERWRITE_IF))) {
3227 if (!open_match_attributes(conn, existing_dos_attributes,
3229 unx_mode, &new_unx_mode)) {
3230 DEBUG(5,("open_file_ntcreate: attributes mismatch "
3231 "for file %s (%x %x) (0%o, 0%o)\n",
3232 smb_fname_str_dbg(smb_fname),
3233 existing_dos_attributes,
3235 (unsigned int)smb_fname->st.st_ex_mode,
3236 (unsigned int)unx_mode ));
3238 return NT_STATUS_ACCESS_DENIED;
3242 status = smbd_calculate_access_mask(conn, smb_fname,
3246 if (!NT_STATUS_IS_OK(status)) {
3247 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
3248 "on file %s returned %s\n",
3249 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
3253 open_access_mask = access_mask;
3255 if (flags2 & O_TRUNC) {
3256 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
3259 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
3260 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
3264 * Note that we ignore the append flag as append does not
3265 * mean the same thing under DOS and Unix.
3268 flags = calculate_open_access_flags(access_mask, private_flags);
3271 * Currently we only look at FILE_WRITE_THROUGH for create options.
3275 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
3280 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
3284 if (!posix_open && !CAN_WRITE(conn)) {
3286 * We should really return a permission denied error if either
3287 * O_CREAT or O_TRUNC are set, but for compatibility with
3288 * older versions of Samba we just AND them out.
3290 flags2 &= ~(O_CREAT|O_TRUNC);
3293 if (lp_kernel_oplocks(SNUM(conn))) {
3295 * With kernel oplocks the open breaking an oplock
3296 * blocks until the oplock holder has given up the
3297 * oplock or closed the file. We prevent this by always
3298 * trying to open the file with O_NONBLOCK (see "man
3301 * If a process that doesn't use the smbd open files
3302 * database or communication methods holds a kernel
3303 * oplock we must periodically poll for available open
3306 flags2 |= O_NONBLOCK;
3310 * Ensure we can't write on a read-only share or file.
3313 if (flags != O_RDONLY && file_existed &&
3314 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
3315 DEBUG(5,("open_file_ntcreate: write access requested for "
3316 "file %s on read only %s\n",
3317 smb_fname_str_dbg(smb_fname),
3318 !CAN_WRITE(conn) ? "share" : "file" ));
3320 return NT_STATUS_ACCESS_DENIED;
3323 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
3324 fsp->share_access = share_access;
3325 fsp->fh->private_options = private_flags;
3326 fsp->access_mask = open_access_mask; /* We change this to the
3327 * requested access_mask after
3328 * the open is done. */
3330 fsp->posix_flags |= FSP_POSIX_FLAGS_ALL;
3333 if (timeval_is_zero(&request_time)) {
3334 request_time = fsp->open_time;
3337 if ((create_options & FILE_DELETE_ON_CLOSE) &&
3338 (flags2 & O_CREAT) &&
3340 /* Delete on close semantics for new files. */
3341 status = can_set_delete_on_close(fsp,
3342 new_dos_attributes);
3343 if (!NT_STATUS_IS_OK(status)) {
3350 * Ensure we pay attention to default ACLs on directories if required.
3353 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
3354 (def_acl = directory_has_default_acl(conn, parent_dir))) {
3355 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
3358 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
3359 "access_mask = 0x%x, open_access_mask = 0x%x\n",
3360 (unsigned int)flags, (unsigned int)flags2,
3361 (unsigned int)unx_mode, (unsigned int)access_mask,
3362 (unsigned int)open_access_mask));
3364 fsp_open = open_file(fsp, conn, req, parent_dir,
3365 flags|flags2, unx_mode, access_mask,
3366 open_access_mask, &new_file_created);
3368 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_NETWORK_BUSY)) {
3372 * This handles the kernel oplock case:
3374 * the file has an active kernel oplock and the open() returned
3375 * EWOULDBLOCK/EAGAIN which maps to NETWORK_BUSY.
3377 * "Samba locking.tdb oplocks" are handled below after acquiring
3378 * the sharemode lock with get_share_mode_lock().
3380 if (file_existed && S_ISFIFO(fsp->fsp_name->st.st_ex_mode)) {
3381 DEBUG(10, ("FIFO busy\n"));
3382 return NT_STATUS_NETWORK_BUSY;
3385 DEBUG(10, ("Internal open busy\n"));
3386 return NT_STATUS_NETWORK_BUSY;
3390 * From here on we assume this is an oplock break triggered
3393 lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
3396 * No oplock from Samba around. Set up a poll every 1
3397 * second to retry a non-blocking open until the time
3400 setup_kernel_oplock_poll_open(request_time,
3403 DBG_DEBUG("No Samba oplock around after EWOULDBLOCK. "
3404 "Retrying with poll\n");
3405 return NT_STATUS_SHARING_VIOLATION;
3408 if (!validate_oplock_types(lck)) {
3409 smb_panic("validate_oplock_types failed");
3412 delay = delay_for_oplock(fsp, 0, lease, lck, false,
3414 first_open_attempt);
3416 schedule_defer_open(lck, fsp->file_id, request_time,
3419 DEBUG(10, ("Sent oplock break request to kernel "
3420 "oplock holder\n"));
3421 return NT_STATUS_SHARING_VIOLATION;
3425 * No oplock from Samba around. Set up a poll every 1
3426 * second to retry a non-blocking open until the time
3429 setup_kernel_oplock_poll_open(request_time, req, fsp->file_id);
3432 DBG_DEBUG("No Samba oplock around after EWOULDBLOCK. "
3433 "Retrying with poll\n");
3434 return NT_STATUS_SHARING_VIOLATION;
3437 if (!NT_STATUS_IS_OK(fsp_open)) {
3438 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_RETRY)) {
3439 schedule_async_open(request_time, req);
3444 if (new_file_created) {
3446 * As we atomically create using O_CREAT|O_EXCL,
3447 * then if new_file_created is true, then
3448 * file_existed *MUST* have been false (even
3449 * if the file was previously detected as being
3452 file_existed = false;
3455 if (file_existed && !check_same_dev_ino(&saved_stat, &smb_fname->st)) {
3457 * The file did exist, but some other (local or NFS)
3458 * process either renamed/unlinked and re-created the
3459 * file with different dev/ino after we walked the path,
3460 * but before we did the open. We could retry the
3461 * open but it's a rare enough case it's easier to
3462 * just fail the open to prevent creating any problems
3463 * in the open file db having the wrong dev/ino key.
3466 DBG_WARNING("file %s - dev/ino mismatch. "
3467 "Old (dev=%ju, ino=%ju). "
3468 "New (dev=%ju, ino=%ju). Failing open "
3469 "with NT_STATUS_ACCESS_DENIED.\n",
3470 smb_fname_str_dbg(smb_fname),
3471 (uintmax_t)saved_stat.st_ex_dev,
3472 (uintmax_t)saved_stat.st_ex_ino,
3473 (uintmax_t)smb_fname->st.st_ex_dev,
3474 (uintmax_t)smb_fname->st.st_ex_ino);
3475 return NT_STATUS_ACCESS_DENIED;
3478 old_write_time = smb_fname->st.st_ex_mtime;
3481 * Deal with the race condition where two smbd's detect the
3482 * file doesn't exist and do the create at the same time. One
3483 * of them will win and set a share mode, the other (ie. this
3484 * one) should check if the requested share mode for this
3485 * create is allowed.
3489 * Now the file exists and fsp is successfully opened,
3490 * fsp->dev and fsp->inode are valid and should replace the
3491 * dev=0,inode=0 from a non existent file. Spotted by
3492 * Nadav Danieli <nadavd@exanet.com>. JRA.
3497 lck = get_share_mode_lock(talloc_tos(), id,
3499 smb_fname, &old_write_time);
3502 DEBUG(0, ("open_file_ntcreate: Could not get share "
3503 "mode lock for %s\n",
3504 smb_fname_str_dbg(smb_fname)));
3506 return NT_STATUS_SHARING_VIOLATION;
3509 /* Get the types we need to examine. */
3510 if (!validate_oplock_types(lck)) {
3511 smb_panic("validate_oplock_types failed");
3514 if (has_delete_on_close(lck, fsp->name_hash)) {
3517 return NT_STATUS_DELETE_PENDING;
3520 status = open_mode_check(conn, lck,
3521 access_mask, share_access);
3523 if (NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION) ||
3524 (lck->data->num_share_modes > 0)) {
3526 * This comes from ancient times out of open_mode_check. I
3527 * have no clue whether this is still necessary. I can't think
3528 * of a case where this would actually matter further down in
3529 * this function. I leave it here for further investigation
3532 file_existed = true;
3537 * Handle oplocks, deferring the request if delay_for_oplock()
3538 * triggered a break message and we have to wait for the break
3542 bool sharing_violation = NT_STATUS_EQUAL(
3543 status, NT_STATUS_SHARING_VIOLATION);
3545 delay = delay_for_oplock(fsp, oplock_request, lease, lck,
3548 first_open_attempt);
3550 schedule_defer_open(lck, fsp->file_id,
3554 return NT_STATUS_SHARING_VIOLATION;
3558 if (!NT_STATUS_IS_OK(status)) {
3559 uint32_t can_access_mask;
3560 bool can_access = True;
3562 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
3564 /* Check if this can be done with the deny_dos and fcb
3567 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
3568 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
3570 DEBUG(0, ("DOS open without an SMB "
3574 return NT_STATUS_INTERNAL_ERROR;
3577 /* Use the client requested access mask here,
3578 * not the one we open with. */
3579 status = fcb_or_dos_open(req,
3590 if (NT_STATUS_IS_OK(status)) {
3593 *pinfo = FILE_WAS_OPENED;
3595 return NT_STATUS_OK;
3600 * This next line is a subtlety we need for
3601 * MS-Access. If a file open will fail due to share
3602 * permissions and also for security (access) reasons,
3603 * we need to return the access failed error, not the
3604 * share error. We can't open the file due to kernel
3605 * oplock deadlock (it's possible we failed above on
3606 * the open_mode_check()) so use a userspace check.
3609 if (flags & O_RDWR) {
3610 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
3611 } else if (flags & O_WRONLY) {
3612 can_access_mask = FILE_WRITE_DATA;
3614 can_access_mask = FILE_READ_DATA;
3617 if (((can_access_mask & FILE_WRITE_DATA) &&
3618 !CAN_WRITE(conn)) ||
3619 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
3622 can_access_mask))) {
3627 * If we're returning a share violation, ensure we
3628 * cope with the braindead 1 second delay (SMB1 only).
3631 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
3632 !conn->sconn->using_smb2 &&
3633 lp_defer_sharing_violations()) {
3634 struct timeval timeout;
3637 /* this is a hack to speed up torture tests
3639 timeout_usecs = lp_parm_int(SNUM(conn),
3640 "smbd","sharedelay",
3641 SHARING_VIOLATION_USEC_WAIT);
3643 /* This is a relative time, added to the absolute
3644 request_time value to get the absolute timeout time.
3645 Note that if this is the second or greater time we enter
3646 this codepath for this particular request mid then
3647 request_time is left as the absolute time of the *first*
3648 time this request mid was processed. This is what allows
3649 the request to eventually time out. */
3651 timeout = timeval_set(0, timeout_usecs);
3653 if (!request_timed_out(request_time, timeout)) {
3654 defer_open(lck, request_time, timeout, req,
3663 * We have detected a sharing violation here
3664 * so return the correct error code
3666 status = NT_STATUS_SHARING_VIOLATION;
3668 status = NT_STATUS_ACCESS_DENIED;
3673 /* Should we atomically (to the client at least) truncate ? */
3674 if ((!new_file_created) &&
3675 (flags2 & O_TRUNC) &&
3676 (!S_ISFIFO(fsp->fsp_name->st.st_ex_mode))) {
3679 ret = vfs_set_filelen(fsp, 0);
3681 status = map_nt_error_from_unix(errno);
3689 * We have the share entry *locked*.....
3692 /* Delete streams if create_disposition requires it */
3693 if (!new_file_created && clear_ads(create_disposition) &&
3694 !is_ntfs_stream_smb_fname(smb_fname)) {
3695 status = delete_all_streams(conn, smb_fname);
3696 if (!NT_STATUS_IS_OK(status)) {
3703 /* note that we ignore failure for the following. It is
3704 basically a hack for NFS, and NFS will never set one of
3705 these only read them. Nobody but Samba can ever set a deny
3706 mode and we have already checked our more authoritative
3707 locking database for permission to set this deny mode. If
3708 the kernel refuses the operations then the kernel is wrong.
3709 note that GPFS supports it as well - jmcd */
3711 if (fsp->fh->fd != -1 && lp_kernel_share_modes(SNUM(conn))) {
3714 * Beware: streams implementing VFS modules may
3715 * implement streams in a way that fsp will have the
3716 * basefile open in the fsp fd, so lacking a distinct
3717 * fd for the stream kernel_flock will apply on the
3718 * basefile which is wrong. The actual check is
3719 * deffered to the VFS module implementing the
3720 * kernel_flock call.
3722 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
3723 if(ret_flock == -1 ){
3728 return NT_STATUS_SHARING_VIOLATION;
3731 fsp->kernel_share_modes_taken = true;
3735 * At this point onwards, we can guarantee that the share entry
3736 * is locked, whether we created the file or not, and that the
3737 * deny mode is compatible with all current opens.
3741 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
3742 * but we don't have to store this - just ignore it on access check.
3744 if (conn->sconn->using_smb2) {
3746 * SMB2 doesn't return it (according to Microsoft tests).
3747 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
3748 * File created with access = 0x7 (Read, Write, Delete)
3749 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
3751 fsp->access_mask = access_mask;
3753 /* But SMB1 does. */
3754 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3759 * stat opens on existing files don't get oplocks.
3760 * They can get leases.
3762 * Note that we check for stat open on the *open_access_mask*,
3763 * i.e. the access mask we actually used to do the open,
3764 * not the one the client asked for (which is in
3765 * fsp->access_mask). This is due to the fact that
3766 * FILE_OVERWRITE and FILE_OVERWRITE_IF add in O_TRUNC,
3767 * which adds FILE_WRITE_DATA to open_access_mask.
3769 if (is_stat_open(open_access_mask) && lease == NULL) {
3770 oplock_request = NO_OPLOCK;
3774 if (new_file_created) {
3775 info = FILE_WAS_CREATED;
3777 if (flags2 & O_TRUNC) {
3778 info = FILE_WAS_OVERWRITTEN;
3780 info = FILE_WAS_OPENED;
3789 * Setup the oplock info in both the shared memory and
3792 status = grant_fsp_oplock_type(req, fsp, lck, oplock_request, lease);
3793 if (!NT_STATUS_IS_OK(status)) {
3799 /* Handle strange delete on close create semantics. */
3800 if (create_options & FILE_DELETE_ON_CLOSE) {
3801 if (!new_file_created) {
3802 status = can_set_delete_on_close(fsp,
3803 existing_dos_attributes);
3805 if (!NT_STATUS_IS_OK(status)) {
3806 /* Remember to delete the mode we just added. */
3807 del_share_mode(lck, fsp);
3813 /* Note that here we set the *initial* delete on close flag,
3814 not the regular one. The magic gets handled in close. */
3815 fsp->initial_delete_on_close = True;
3818 if (info != FILE_WAS_OPENED) {
3819 /* Overwritten files should be initially set as archive */
3820 if ((info == FILE_WAS_OVERWRITTEN && lp_map_archive(SNUM(conn))) ||
3821 lp_store_dos_attributes(SNUM(conn))) {
3823 if (file_set_dosmode(conn, smb_fname,
3824 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
3825 parent_dir, true) == 0) {
3826 unx_mode = smb_fname->st.st_ex_mode;
3832 /* Determine sparse flag. */
3834 /* POSIX opens are sparse by default. */
3835 fsp->is_sparse = true;
3837 fsp->is_sparse = (file_existed &&
3838 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
3842 * Take care of inherited ACLs on created files - if default ACL not
3846 if (!posix_open && new_file_created && !def_acl) {
3847 if (unx_mode != smb_fname->st.st_ex_mode) {
3848 int ret = SMB_VFS_FCHMOD(fsp, unx_mode);
3850 DBG_INFO("failed to reset "
3851 "attributes of file %s to 0%o\n",
3852 smb_fname_str_dbg(smb_fname),
3853 (unsigned int)unx_mode);
3857 } else if (new_unx_mode) {
3859 * We only get here in the case of:
3861 * a). Not a POSIX open.
3862 * b). File already existed.
3863 * c). File was overwritten.
3864 * d). Requested DOS attributes didn't match
3865 * the DOS attributes on the existing file.
3867 * In that case new_unx_mode has been set
3868 * equal to the calculated mode (including
3869 * possible inheritance of the mode from the
3870 * containing directory).
3872 * Note this mode was calculated with the
3873 * DOS attribute FILE_ATTRIBUTE_ARCHIVE added,
3874 * so the mode change here is suitable for
3875 * an overwritten file.
3878 if (new_unx_mode != smb_fname->st.st_ex_mode) {
3879 int ret = SMB_VFS_FCHMOD(fsp, new_unx_mode);
3881 DBG_INFO("failed to reset "
3882 "attributes of file %s to 0%o\n",
3883 smb_fname_str_dbg(smb_fname),
3884 (unsigned int)new_unx_mode);
3891 * Deal with other opens having a modified write time.
3893 struct timespec write_time = get_share_mode_write_time(lck);
3895 if (!null_timespec(write_time)) {
3896 update_stat_ex_mtime(&fsp->fsp_name->st, write_time);
3902 return NT_STATUS_OK;
3905 static NTSTATUS mkdir_internal(connection_struct *conn,
3906 struct smb_filename *smb_dname,
3907 uint32_t file_attributes)
3910 char *parent_dir = NULL;
3912 bool posix_open = false;
3913 bool need_re_stat = false;
3914 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
3916 if (!CAN_WRITE(conn) || (access_mask & ~(conn->share_access))) {
3917 DEBUG(5,("mkdir_internal: failing share access "
3918 "%s\n", lp_servicename(talloc_tos(), SNUM(conn))));
3919 return NT_STATUS_ACCESS_DENIED;
3922 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
3924 return NT_STATUS_NO_MEMORY;
3927 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3929 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
3931 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
3934 status = check_parent_access(conn,
3937 if(!NT_STATUS_IS_OK(status)) {
3938 DEBUG(5,("mkdir_internal: check_parent_access "
3939 "on directory %s for path %s returned %s\n",
3941 smb_dname->base_name,
3942 nt_errstr(status) ));
3946 if (SMB_VFS_MKDIR(conn, smb_dname, mode) != 0) {
3947 return map_nt_error_from_unix(errno);
3950 /* Ensure we're checking for a symlink here.... */
3951 /* We don't want to get caught by a symlink racer. */
3953 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
3954 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
3955 smb_fname_str_dbg(smb_dname), strerror(errno)));
3956 return map_nt_error_from_unix(errno);
3959 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
3960 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
3961 smb_fname_str_dbg(smb_dname)));
3962 return NT_STATUS_NOT_A_DIRECTORY;
3965 if (lp_store_dos_attributes(SNUM(conn))) {
3967 file_set_dosmode(conn, smb_dname,
3968 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
3973 if (lp_inherit_permissions(SNUM(conn))) {
3974 inherit_access_posix_acl(conn, parent_dir,
3976 need_re_stat = true;
3981 * Check if high bits should have been set,
3982 * then (if bits are missing): add them.
3983 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
3986 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
3987 (mode & ~smb_dname->st.st_ex_mode)) {
3988 SMB_VFS_CHMOD(conn, smb_dname,
3989 (smb_dname->st.st_ex_mode |
3990 (mode & ~smb_dname->st.st_ex_mode)));
3991 need_re_stat = true;
3995 /* Change the owner if required. */
3996 if (lp_inherit_owner(SNUM(conn)) != INHERIT_OWNER_NO) {
3997 change_dir_owner_to_parent(conn, parent_dir,
4000 need_re_stat = true;
4004 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
4005 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
4006 smb_fname_str_dbg(smb_dname), strerror(errno)));
4007 return map_nt_error_from_unix(errno);
4011 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
4012 smb_dname->base_name);
4014 return NT_STATUS_OK;
4017 /****************************************************************************
4018 Open a directory from an NT SMB call.
4019 ****************************************************************************/
4021 static NTSTATUS open_directory(connection_struct *conn,
4022 struct smb_request *req,
4023 struct smb_filename *smb_dname,
4024 uint32_t access_mask,
4025 uint32_t share_access,
4026 uint32_t create_disposition,
4027 uint32_t create_options,
4028 uint32_t file_attributes,
4030 files_struct **result)
4032 files_struct *fsp = NULL;
4033 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
4034 struct share_mode_lock *lck = NULL;
4036 struct timespec mtimespec;
4040 if (is_ntfs_stream_smb_fname(smb_dname)) {
4041 DEBUG(2, ("open_directory: %s is a stream name!\n",
4042 smb_fname_str_dbg(smb_dname)));
4043 return NT_STATUS_NOT_A_DIRECTORY;
4046 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
4047 /* Ensure we have a directory attribute. */
4048 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
4051 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
4052 "share_access = 0x%x create_options = 0x%x, "
4053 "create_disposition = 0x%x, file_attributes = 0x%x\n",
4054 smb_fname_str_dbg(smb_dname),
4055 (unsigned int)access_mask,
4056 (unsigned int)share_access,
4057 (unsigned int)create_options,
4058 (unsigned int)create_disposition,
4059 (unsigned int)file_attributes));
4061 status = smbd_calculate_access_mask(conn, smb_dname, false,
4062 access_mask, &access_mask);
4063 if (!NT_STATUS_IS_OK(status)) {
4064 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
4065 "on file %s returned %s\n",
4066 smb_fname_str_dbg(smb_dname),
4067 nt_errstr(status)));
4071 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
4072 !security_token_has_privilege(get_current_nttok(conn),
4073 SEC_PRIV_SECURITY)) {
4074 DEBUG(10, ("open_directory: open on %s "
4075 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
4076 smb_fname_str_dbg(smb_dname)));
4077 return NT_STATUS_PRIVILEGE_NOT_HELD;
4080 switch( create_disposition ) {
4084 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
4087 info = FILE_WAS_OPENED;
4092 /* If directory exists error. If directory doesn't
4096 status = NT_STATUS_OBJECT_NAME_COLLISION;
4097 DEBUG(2, ("open_directory: unable to create "
4098 "%s. Error was %s\n",
4099 smb_fname_str_dbg(smb_dname),
4100 nt_errstr(status)));
4104 status = mkdir_internal(conn, smb_dname,
4107 if (!NT_STATUS_IS_OK(status)) {
4108 DEBUG(2, ("open_directory: unable to create "
4109 "%s. Error was %s\n",
4110 smb_fname_str_dbg(smb_dname),
4111 nt_errstr(status)));
4115 info = FILE_WAS_CREATED;
4120 * If directory exists open. If directory doesn't
4125 status = NT_STATUS_OK;
4126 info = FILE_WAS_OPENED;
4128 status = mkdir_internal(conn, smb_dname,
4131 if (NT_STATUS_IS_OK(status)) {
4132 info = FILE_WAS_CREATED;
4134 /* Cope with create race. */
4135 if (!NT_STATUS_EQUAL(status,
4136 NT_STATUS_OBJECT_NAME_COLLISION)) {
4137 DEBUG(2, ("open_directory: unable to create "
4138 "%s. Error was %s\n",
4139 smb_fname_str_dbg(smb_dname),
4140 nt_errstr(status)));
4145 * If mkdir_internal() returned
4146 * NT_STATUS_OBJECT_NAME_COLLISION
4147 * we still must lstat the path.
4150 if (SMB_VFS_LSTAT(conn, smb_dname)
4152 DEBUG(2, ("Could not stat "
4153 "directory '%s' just "
4158 return map_nt_error_from_unix(
4162 info = FILE_WAS_OPENED;
4168 case FILE_SUPERSEDE:
4169 case FILE_OVERWRITE:
4170 case FILE_OVERWRITE_IF:
4172 DEBUG(5,("open_directory: invalid create_disposition "
4173 "0x%x for directory %s\n",
4174 (unsigned int)create_disposition,
4175 smb_fname_str_dbg(smb_dname)));
4176 return NT_STATUS_INVALID_PARAMETER;
4179 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
4180 DEBUG(5,("open_directory: %s is not a directory !\n",
4181 smb_fname_str_dbg(smb_dname)));
4182 return NT_STATUS_NOT_A_DIRECTORY;
4185 if (info == FILE_WAS_OPENED) {
4186 status = smbd_check_access_rights(conn,
4190 if (!NT_STATUS_IS_OK(status)) {
4191 DEBUG(10, ("open_directory: smbd_check_access_rights on "
4192 "file %s failed with %s\n",
4193 smb_fname_str_dbg(smb_dname),
4194 nt_errstr(status)));
4199 status = file_new(req, conn, &fsp);
4200 if(!NT_STATUS_IS_OK(status)) {
4205 * Setup the files_struct for it.
4208 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
4209 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
4210 fsp->file_pid = req ? req->smbpid : 0;
4211 fsp->can_lock = False;
4212 fsp->can_read = False;
4213 fsp->can_write = False;
4215 fsp->share_access = share_access;
4216 fsp->fh->private_options = 0;
4218 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
4220 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
4221 fsp->print_file = NULL;
4222 fsp->modified = False;
4223 fsp->oplock_type = NO_OPLOCK;
4224 fsp->sent_oplock_break = NO_BREAK_SENT;
4225 fsp->is_directory = True;
4226 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
4227 fsp->posix_flags |= FSP_POSIX_FLAGS_ALL;
4229 status = fsp_set_smb_fname(fsp, smb_dname);
4230 if (!NT_STATUS_IS_OK(status)) {
4231 file_free(req, fsp);
4235 /* Don't store old timestamps for directory
4236 handles in the internal database. We don't
4237 update them in there if new objects
4238 are creaded in the directory. Currently
4239 we only update timestamps on file writes.
4242 ZERO_STRUCT(mtimespec);
4244 if (access_mask & (FILE_LIST_DIRECTORY|
4246 FILE_ADD_SUBDIRECTORY|
4249 FILE_DELETE_CHILD)) {
4251 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
4253 /* POSIX allows us to open a directory with O_RDONLY. */
4254 status = fd_open(conn, fsp, O_RDONLY, 0);
4256 if (!NT_STATUS_IS_OK(status)) {
4257 DEBUG(5, ("open_directory: Could not open fd for "
4259 smb_fname_str_dbg(smb_dname),
4260 nt_errstr(status)));
4261 file_free(req, fsp);
4266 DEBUG(10, ("Not opening Directory %s\n",
4267 smb_fname_str_dbg(smb_dname)));
4270 status = vfs_stat_fsp(fsp);
4271 if (!NT_STATUS_IS_OK(status)) {
4273 file_free(req, fsp);
4277 if(!S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
4278 DEBUG(5,("open_directory: %s is not a directory !\n",
4279 smb_fname_str_dbg(smb_dname)));
4281 file_free(req, fsp);
4282 return NT_STATUS_NOT_A_DIRECTORY;
4285 /* Ensure there was no race condition. We need to check
4286 * dev/inode but not permissions, as these can change
4288 if (!check_same_dev_ino(&smb_dname->st, &fsp->fsp_name->st)) {
4289 DEBUG(5,("open_directory: stat struct differs for "
4291 smb_fname_str_dbg(smb_dname)));
4293 file_free(req, fsp);
4294 return NT_STATUS_ACCESS_DENIED;
4297 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
4298 conn->connectpath, smb_dname,
4302 DEBUG(0, ("open_directory: Could not get share mode lock for "
4303 "%s\n", smb_fname_str_dbg(smb_dname)));
4305 file_free(req, fsp);
4306 return NT_STATUS_SHARING_VIOLATION;
4309 if (has_delete_on_close(lck, fsp->name_hash)) {
4312 file_free(req, fsp);
4313 return NT_STATUS_DELETE_PENDING;
4316 status = open_mode_check(conn, lck,
4317 access_mask, share_access);
4319 if (!NT_STATUS_IS_OK(status)) {
4322 file_free(req, fsp);
4326 ok = set_share_mode(lck, fsp, get_current_uid(conn),
4327 req ? req->mid : 0, NO_OPLOCK,
4332 file_free(req, fsp);
4333 return NT_STATUS_NO_MEMORY;
4336 /* For directories the delete on close bit at open time seems
4337 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
4338 if (create_options & FILE_DELETE_ON_CLOSE) {
4339 status = can_set_delete_on_close(fsp, 0);
4340 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
4341 del_share_mode(lck, fsp);
4344 file_free(req, fsp);
4348 if (NT_STATUS_IS_OK(status)) {
4349 /* Note that here we set the *initial* delete on close flag,
4350 not the regular one. The magic gets handled in close. */
4351 fsp->initial_delete_on_close = True;
4357 * Deal with other opens having a modified write time. Is this
4358 * possible for directories?
4360 struct timespec write_time = get_share_mode_write_time(lck);
4362 if (!null_timespec(write_time)) {
4363 update_stat_ex_mtime(&fsp->fsp_name->st, write_time);
4374 return NT_STATUS_OK;
4377 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
4378 struct smb_filename *smb_dname)
4383 status = SMB_VFS_CREATE_FILE(
4386 0, /* root_dir_fid */
4387 smb_dname, /* fname */
4388 FILE_READ_ATTRIBUTES, /* access_mask */
4389 FILE_SHARE_NONE, /* share_access */
4390 FILE_CREATE, /* create_disposition*/
4391 FILE_DIRECTORY_FILE, /* create_options */
4392 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
4393 0, /* oplock_request */
4395 0, /* allocation_size */
4396 0, /* private_flags */
4401 NULL, NULL); /* create context */
4403 if (NT_STATUS_IS_OK(status)) {
4404 close_file(req, fsp, NORMAL_CLOSE);
4410 /****************************************************************************
4411 Receive notification that one of our open files has been renamed by another
4413 ****************************************************************************/
4415 void msg_file_was_renamed(struct messaging_context *msg,
4418 struct server_id server_id,
4422 char *frm = (char *)data->data;
4424 const char *sharepath;
4425 const char *base_name;
4426 const char *stream_name;
4427 struct smb_filename *smb_fname = NULL;
4428 size_t sp_len, bn_len;
4430 struct smbd_server_connection *sconn =
4431 talloc_get_type_abort(private_data,
4432 struct smbd_server_connection);
4434 if (data->data == NULL
4435 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
4436 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
4437 (int)data->length));
4441 /* Unpack the message. */
4442 pull_file_id_24(frm, &id);
4443 sharepath = &frm[24];
4444 sp_len = strlen(sharepath);
4445 base_name = sharepath + sp_len + 1;
4446 bn_len = strlen(base_name);
4447 stream_name = sharepath + sp_len + 1 + bn_len + 1;
4449 /* stream_name must always be NULL if there is no stream. */
4450 if (stream_name[0] == '\0') {
4454 smb_fname = synthetic_smb_fname(talloc_tos(),
4459 if (smb_fname == NULL) {
4463 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
4465 sharepath, smb_fname_str_dbg(smb_fname),
4466 file_id_string_tos(&id)));
4468 for(fsp = file_find_di_first(sconn, id); fsp;
4469 fsp = file_find_di_next(fsp)) {
4470 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
4472 DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
4473 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
4474 smb_fname_str_dbg(smb_fname)));
4475 status = fsp_set_smb_fname(fsp, smb_fname);
4476 if (!NT_STATUS_IS_OK(status)) {
4481 /* Now we have the complete path we can work out if this is
4482 actually within this share and adjust newname accordingly. */
4483 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
4484 "not sharepath %s) "
4485 "%s from %s -> %s\n",
4486 fsp->conn->connectpath,
4490 smb_fname_str_dbg(smb_fname)));
4494 TALLOC_FREE(smb_fname);
4499 * If a main file is opened for delete, all streams need to be checked for
4500 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
4501 * If that works, delete them all by setting the delete on close and close.
4504 static NTSTATUS open_streams_for_delete(connection_struct *conn,
4505 const struct smb_filename *smb_fname)
4507 struct stream_struct *stream_info = NULL;
4508 files_struct **streams = NULL;
4510 unsigned int num_streams = 0;
4511 TALLOC_CTX *frame = talloc_stackframe();
4514 status = vfs_streaminfo(conn, NULL, smb_fname, talloc_tos(),
4515 &num_streams, &stream_info);
4517 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
4518 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
4519 DEBUG(10, ("no streams around\n"));
4521 return NT_STATUS_OK;
4524 if (!NT_STATUS_IS_OK(status)) {
4525 DEBUG(10, ("vfs_streaminfo failed: %s\n",
4526 nt_errstr(status)));
4530 DEBUG(10, ("open_streams_for_delete found %d streams\n",
4533 if (num_streams == 0) {
4535 return NT_STATUS_OK;
4538 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
4539 if (streams == NULL) {
4540 DEBUG(0, ("talloc failed\n"));
4541 status = NT_STATUS_NO_MEMORY;
4545 for (i=0; i<num_streams; i++) {
4546 struct smb_filename *smb_fname_cp;
4548 if (strequal(stream_info[i].name, "::$DATA")) {
4553 smb_fname_cp = synthetic_smb_fname(talloc_tos(),
4554 smb_fname->base_name,
4555 stream_info[i].name,
4558 ~SMB_FILENAME_POSIX_PATH));
4559 if (smb_fname_cp == NULL) {
4560 status = NT_STATUS_NO_MEMORY;
4564 if (SMB_VFS_STAT(conn, smb_fname_cp) == -1) {
4565 DEBUG(10, ("Unable to stat stream: %s\n",
4566 smb_fname_str_dbg(smb_fname_cp)));
4569 status = SMB_VFS_CREATE_FILE(
4572 0, /* root_dir_fid */
4573 smb_fname_cp, /* fname */
4574 DELETE_ACCESS, /* access_mask */
4575 (FILE_SHARE_READ | /* share_access */
4576 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
4577 FILE_OPEN, /* create_disposition*/
4578 0, /* create_options */
4579 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
4580 0, /* oplock_request */
4582 0, /* allocation_size */
4583 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
4586 &streams[i], /* result */
4588 NULL, NULL); /* create context */
4590 if (!NT_STATUS_IS_OK(status)) {
4591 DEBUG(10, ("Could not open stream %s: %s\n",
4592 smb_fname_str_dbg(smb_fname_cp),
4593 nt_errstr(status)));
4595 TALLOC_FREE(smb_fname_cp);
4598 TALLOC_FREE(smb_fname_cp);
4602 * don't touch the variable "status" beyond this point :-)
4605 for (i -= 1 ; i >= 0; i--) {
4606 if (streams[i] == NULL) {
4610 DEBUG(10, ("Closing stream # %d, %s\n", i,
4611 fsp_str_dbg(streams[i])));
4612 close_file(NULL, streams[i], NORMAL_CLOSE);
4620 /*********************************************************************
4621 Create a default ACL by inheriting from the parent. If no inheritance
4622 from the parent available, don't set anything. This will leave the actual
4623 permissions the new file or directory already got from the filesystem
4624 as the NT ACL when read.
4625 *********************************************************************/
4627 static NTSTATUS inherit_new_acl(files_struct *fsp)
4629 TALLOC_CTX *frame = talloc_stackframe();
4630 char *parent_name = NULL;
4631 struct security_descriptor *parent_desc = NULL;
4632 NTSTATUS status = NT_STATUS_OK;
4633 struct security_descriptor *psd = NULL;
4634 const struct dom_sid *owner_sid = NULL;
4635 const struct dom_sid *group_sid = NULL;
4636 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
4637 struct security_token *token = fsp->conn->session_info->security_token;
4638 bool inherit_owner =
4639 (lp_inherit_owner(SNUM(fsp->conn)) == INHERIT_OWNER_WINDOWS_AND_UNIX);
4640 bool inheritable_components = false;
4641 bool try_builtin_administrators = false;
4642 const struct dom_sid *BA_U_sid = NULL;
4643 const struct dom_sid *BA_G_sid = NULL;
4644 bool try_system = false;
4645 const struct dom_sid *SY_U_sid = NULL;
4646 const struct dom_sid *SY_G_sid = NULL;
4648 struct smb_filename *parent_smb_fname = NULL;
4650 if (!parent_dirname(frame, fsp->fsp_name->base_name, &parent_name, NULL)) {
4652 return NT_STATUS_NO_MEMORY;
4654 parent_smb_fname = synthetic_smb_fname(talloc_tos(),
4658 fsp->fsp_name->flags);
4660 if (parent_smb_fname == NULL) {
4662 return NT_STATUS_NO_MEMORY;
4665 status = SMB_VFS_GET_NT_ACL(fsp->conn,
4667 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
4670 if (!NT_STATUS_IS_OK(status)) {
4675 inheritable_components = sd_has_inheritable_components(parent_desc,
4678 if (!inheritable_components && !inherit_owner) {
4680 /* Nothing to inherit and not setting owner. */
4681 return NT_STATUS_OK;
4684 /* Create an inherited descriptor from the parent. */
4686 if (DEBUGLEVEL >= 10) {
4687 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
4688 fsp_str_dbg(fsp) ));
4689 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
4692 /* Inherit from parent descriptor if "inherit owner" set. */
4693 if (inherit_owner) {
4694 owner_sid = parent_desc->owner_sid;
4695 group_sid = parent_desc->group_sid;
4698 if (owner_sid == NULL) {
4699 if (security_token_has_builtin_administrators(token)) {
4700 try_builtin_administrators = true;
4701 } else if (security_token_is_system(token)) {
4702 try_builtin_administrators = true;
4707 if (group_sid == NULL &&
4708 token->num_sids == PRIMARY_GROUP_SID_INDEX)
4710 if (security_token_is_system(token)) {
4711 try_builtin_administrators = true;
4716 if (try_builtin_administrators) {
4721 ok = sids_to_unixids(&global_sid_Builtin_Administrators, 1, &ids);
4725 BA_U_sid = &global_sid_Builtin_Administrators;
4726 BA_G_sid = &global_sid_Builtin_Administrators;
4729 BA_U_sid = &global_sid_Builtin_Administrators;
4732 BA_G_sid = &global_sid_Builtin_Administrators;
4745 ok = sids_to_unixids(&global_sid_System, 1, &ids);
4749 SY_U_sid = &global_sid_System;
4750 SY_G_sid = &global_sid_System;
4753 SY_U_sid = &global_sid_System;
4756 SY_G_sid = &global_sid_System;
4764 if (owner_sid == NULL) {
4765 owner_sid = BA_U_sid;
4768 if (owner_sid == NULL) {
4769 owner_sid = SY_U_sid;
4772 if (group_sid == NULL) {
4773 group_sid = SY_G_sid;
4776 if (try_system && group_sid == NULL) {
4777 group_sid = BA_G_sid;
4780 if (owner_sid == NULL) {
4781 owner_sid = &token->sids[PRIMARY_USER_SID_INDEX];
4783 if (group_sid == NULL) {
4784 if (token->num_sids == PRIMARY_GROUP_SID_INDEX) {
4785 group_sid = &token->sids[PRIMARY_USER_SID_INDEX];
4787 group_sid = &token->sids[PRIMARY_GROUP_SID_INDEX];
4791 status = se_create_child_secdesc(frame,
4798 if (!NT_STATUS_IS_OK(status)) {
4803 /* If inheritable_components == false,
4804 se_create_child_secdesc()
4805 creates a security descriptor with a NULL dacl
4806 entry, but with SEC_DESC_DACL_PRESENT. We need
4807 to remove that flag. */
4809 if (!inheritable_components) {
4810 security_info_sent &= ~SECINFO_DACL;
4811 psd->type &= ~SEC_DESC_DACL_PRESENT;
4814 if (DEBUGLEVEL >= 10) {
4815 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
4816 fsp_str_dbg(fsp) ));
4817 NDR_PRINT_DEBUG(security_descriptor, psd);
4820 if (inherit_owner) {
4821 /* We need to be root to force this. */
4824 status = SMB_VFS_FSET_NT_ACL(fsp,
4827 if (inherit_owner) {
4835 * If we already have a lease, it must match the new file id. [MS-SMB2]
4836 * 3.3.5.9.8 speaks about INVALID_PARAMETER if an already used lease key is
4837 * used for a different file name.
4840 struct lease_match_state {
4841 /* Input parameters. */
4842 TALLOC_CTX *mem_ctx;
4843 const char *servicepath;
4844 const struct smb_filename *fname;
4847 /* Return parameters. */
4848 uint32_t num_file_ids;
4849 struct file_id *ids;
4850 NTSTATUS match_status;
4853 /*************************************************************
4854 File doesn't exist but this lease key+guid is already in use.
4856 This is only allowable in the dynamic share case where the
4857 service path must be different.
4859 There is a small race condition here in the multi-connection
4860 case where a client sends two create calls on different connections,
4861 where the file doesn't exist and one smbd creates the leases_db
4862 entry first, but this will get fixed by the multichannel cleanup
4863 when all identical client_guids get handled by a single smbd.
4864 **************************************************************/
4866 static void lease_match_parser_new_file(
4868 const struct leases_db_file *files,
4869 struct lease_match_state *state)
4873 for (i = 0; i < num_files; i++) {
4874 const struct leases_db_file *f = &files[i];
4875 if (strequal(state->servicepath, f->servicepath)) {
4876 state->match_status = NT_STATUS_INVALID_PARAMETER;
4881 /* Dynamic share case. Break leases on all other files. */
4882 state->match_status = leases_db_copy_file_ids(state->mem_ctx,
4886 if (!NT_STATUS_IS_OK(state->match_status)) {
4890 state->num_file_ids = num_files;
4891 state->match_status = NT_STATUS_OPLOCK_NOT_GRANTED;
4895 static void lease_match_parser(
4897 const struct leases_db_file *files,
4900 struct lease_match_state *state =
4901 (struct lease_match_state *)private_data;
4904 if (!state->file_existed) {
4906 * Deal with name mismatch or
4907 * possible dynamic share case separately
4908 * to make code clearer.
4910 lease_match_parser_new_file(num_files,
4917 state->match_status = NT_STATUS_OK;
4919 for (i = 0; i < num_files; i++) {
4920 const struct leases_db_file *f = &files[i];
4922 /* Everything should be the same. */
4923 if (!file_id_equal(&state->id, &f->id)) {
4924 /* This should catch all dynamic share cases. */
4925 state->match_status = NT_STATUS_OPLOCK_NOT_GRANTED;
4928 if (!strequal(f->servicepath, state->servicepath)) {
4929 state->match_status = NT_STATUS_INVALID_PARAMETER;
4932 if (!strequal(f->base_name, state->fname->base_name)) {
4933 state->match_status = NT_STATUS_INVALID_PARAMETER;
4936 if (!strequal(f->stream_name, state->fname->stream_name)) {
4937 state->match_status = NT_STATUS_INVALID_PARAMETER;
4942 if (NT_STATUS_IS_OK(state->match_status)) {
4944 * Common case - just opening another handle on a
4945 * file on a non-dynamic share.
4950 if (NT_STATUS_EQUAL(state->match_status, NT_STATUS_INVALID_PARAMETER)) {
4951 /* Mismatched path. Error back to client. */
4956 * File id mismatch. Dynamic share case NT_STATUS_OPLOCK_NOT_GRANTED.
4957 * Don't allow leases.
4960 state->match_status = leases_db_copy_file_ids(state->mem_ctx,
4964 if (!NT_STATUS_IS_OK(state->match_status)) {
4968 state->num_file_ids = num_files;
4969 state->match_status = NT_STATUS_OPLOCK_NOT_GRANTED;
4973 static NTSTATUS lease_match(connection_struct *conn,
4974 struct smb_request *req,
4975 struct smb2_lease_key *lease_key,
4976 const char *servicepath,
4977 const struct smb_filename *fname,
4978 uint16_t *p_version,
4981 struct smbd_server_connection *sconn = req->sconn;
4982 TALLOC_CTX *tos = talloc_tos();
4983 struct lease_match_state state = {
4985 .servicepath = servicepath,
4987 .match_status = NT_STATUS_OK
4992 state.file_existed = VALID_STAT(fname->st);
4993 if (state.file_existed) {
4994 state.id = vfs_file_id_from_sbuf(conn, &fname->st);
4997 status = leases_db_parse(&sconn->client->connections->smb2.client.guid,
4998 lease_key, lease_match_parser, &state);
4999 if (!NT_STATUS_IS_OK(status)) {
5001 * Not found or error means okay: We can make the lease pass
5003 return NT_STATUS_OK;
5005 if (!NT_STATUS_EQUAL(state.match_status, NT_STATUS_OPLOCK_NOT_GRANTED)) {
5007 * Anything but NT_STATUS_OPLOCK_NOT_GRANTED, let the caller
5010 return state.match_status;
5013 /* We have to break all existing leases. */
5014 for (i = 0; i < state.num_file_ids; i++) {
5015 struct share_mode_lock *lck;
5016 struct share_mode_data *d;
5019 if (file_id_equal(&state.ids[i], &state.id)) {
5020 /* Don't need to break our own file. */
5024 lck = get_existing_share_mode_lock(talloc_tos(), state.ids[i]);
5026 /* Race condition - file already closed. */
5030 for (j=0; j<d->num_share_modes; j++) {
5031 struct share_mode_entry *e = &d->share_modes[j];
5032 uint32_t e_lease_type = get_lease_type(d, e);
5034 if (share_mode_stale_pid(d, j)) {
5038 if (e->op_type == LEASE_OPLOCK) {
5039 struct share_mode_lease *l = NULL;
5040 l = &lck->data->leases[e->lease_idx];
5041 if (!smb2_lease_key_equal(&e->lease_key,
5045 *p_epoch = l->epoch;
5046 *p_version = l->lease_version;
5049 if (e_lease_type == SMB2_LEASE_NONE) {
5053 send_break_message(conn->sconn->msg_ctx, &d->id, e,
5057 * Windows 7 and 8 lease clients
5058 * are broken in that they will not
5059 * respond to lease break requests
5060 * whilst waiting for an outstanding
5061 * open request on that lease handle
5062 * on the same TCP connection, due
5063 * to holding an internal inode lock.
5065 * This means we can't reschedule
5066 * ourselves here, but must return
5071 * Send the breaks and then return
5072 * SMB2_LEASE_NONE in the lease handle
5073 * to cause them to acknowledge the
5074 * lease break. Consultation with
5075 * Microsoft engineering confirmed
5076 * this approach is safe.
5083 * Ensure we don't grant anything more so we
5086 return NT_STATUS_OPLOCK_NOT_GRANTED;
5090 * Wrapper around open_file_ntcreate and open_directory
5093 static NTSTATUS create_file_unixpath(connection_struct *conn,
5094 struct smb_request *req,
5095 struct smb_filename *smb_fname,
5096 uint32_t access_mask,
5097 uint32_t share_access,
5098 uint32_t create_disposition,
5099 uint32_t create_options,
5100 uint32_t file_attributes,
5101 uint32_t oplock_request,
5102 struct smb2_lease *lease,
5103 uint64_t allocation_size,
5104 uint32_t private_flags,
5105 struct security_descriptor *sd,
5106 struct ea_list *ea_list,
5108 files_struct **result,
5111 int info = FILE_WAS_OPENED;
5112 files_struct *base_fsp = NULL;
5113 files_struct *fsp = NULL;
5116 DBG_DEBUG("create_file_unixpath: access_mask = 0x%x "
5117 "file_attributes = 0x%x, share_access = 0x%x, "
5118 "create_disposition = 0x%x create_options = 0x%x "
5119 "oplock_request = 0x%x private_flags = 0x%x "
5120 "ea_list = %p, sd = %p, "
5122 (unsigned int)access_mask,
5123 (unsigned int)file_attributes,
5124 (unsigned int)share_access,
5125 (unsigned int)create_disposition,
5126 (unsigned int)create_options,
5127 (unsigned int)oplock_request,
5128 (unsigned int)private_flags,
5129 ea_list, sd, smb_fname_str_dbg(smb_fname));
5131 if (create_options & FILE_OPEN_BY_FILE_ID) {
5132 status = NT_STATUS_NOT_SUPPORTED;
5136 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
5137 status = NT_STATUS_INVALID_PARAMETER;
5142 oplock_request |= INTERNAL_OPEN_ONLY;
5145 if (lease != NULL) {
5146 uint16_t epoch = lease->lease_epoch;
5147 uint16_t version = lease->lease_version;
5150 DBG_WARNING("Got lease on internal open\n");
5151 status = NT_STATUS_INTERNAL_ERROR;
5155 status = lease_match(conn,
5162 if (NT_STATUS_EQUAL(status, NT_STATUS_OPLOCK_NOT_GRANTED)) {
5163 /* Dynamic share file. No leases and update epoch... */
5164 lease->lease_state = SMB2_LEASE_NONE;
5165 lease->lease_epoch = epoch;
5166 lease->lease_version = version;
5167 } else if (!NT_STATUS_IS_OK(status)) {
5172 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
5173 && (access_mask & DELETE_ACCESS)
5174 && !is_ntfs_stream_smb_fname(smb_fname)) {
5176 * We can't open a file with DELETE access if any of the
5177 * streams is open without FILE_SHARE_DELETE
5179 status = open_streams_for_delete(conn, smb_fname);
5181 if (!NT_STATUS_IS_OK(status)) {
5186 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
5187 !security_token_has_privilege(get_current_nttok(conn),
5188 SEC_PRIV_SECURITY)) {
5189 DEBUG(10, ("create_file_unixpath: open on %s "
5190 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
5191 smb_fname_str_dbg(smb_fname)));
5192 status = NT_STATUS_PRIVILEGE_NOT_HELD;
5197 * Files or directories can't be opened DELETE_ON_CLOSE without
5199 * BUG: https://bugzilla.samba.org/show_bug.cgi?id=13358
5201 if (create_options & FILE_DELETE_ON_CLOSE) {
5202 if ((access_mask & DELETE_ACCESS) == 0) {
5203 status = NT_STATUS_INVALID_PARAMETER;
5208 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
5209 && is_ntfs_stream_smb_fname(smb_fname)
5210 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
5211 uint32_t base_create_disposition;
5212 struct smb_filename *smb_fname_base = NULL;
5213 uint32_t base_privflags;
5215 if (create_options & FILE_DIRECTORY_FILE) {
5216 status = NT_STATUS_NOT_A_DIRECTORY;
5220 switch (create_disposition) {
5222 base_create_disposition = FILE_OPEN;
5225 base_create_disposition = FILE_OPEN_IF;
5229 /* Create an smb_filename with stream_name == NULL. */
5230 smb_fname_base = synthetic_smb_fname(talloc_tos(),
5231 smb_fname->base_name,
5235 if (smb_fname_base == NULL) {
5236 status = NT_STATUS_NO_MEMORY;
5240 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
5241 DEBUG(10, ("Unable to stat stream: %s\n",
5242 smb_fname_str_dbg(smb_fname_base)));
5245 * https://bugzilla.samba.org/show_bug.cgi?id=10229
5246 * We need to check if the requested access mask
5247 * could be used to open the underlying file (if
5248 * it existed), as we're passing in zero for the
5249 * access mask to the base filename.
5251 status = check_base_file_access(conn,
5255 if (!NT_STATUS_IS_OK(status)) {
5256 DEBUG(10, ("Permission check "
5257 "for base %s failed: "
5258 "%s\n", smb_fname->base_name,
5259 nt_errstr(status)));
5264 base_privflags = NTCREATEX_OPTIONS_PRIVATE_STREAM_BASEOPEN;
5266 /* Open the base file. */
5267 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
5270 | FILE_SHARE_DELETE,
5271 base_create_disposition,
5276 TALLOC_FREE(smb_fname_base);
5278 if (!NT_STATUS_IS_OK(status)) {
5279 DEBUG(10, ("create_file_unixpath for base %s failed: "
5280 "%s\n", smb_fname->base_name,
5281 nt_errstr(status)));
5284 /* we don't need the low level fd */
5289 * If it's a request for a directory open, deal with it separately.
5292 if (create_options & FILE_DIRECTORY_FILE) {
5294 if (create_options & FILE_NON_DIRECTORY_FILE) {
5295 status = NT_STATUS_INVALID_PARAMETER;
5299 /* Can't open a temp directory. IFS kit test. */
5300 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
5301 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
5302 status = NT_STATUS_INVALID_PARAMETER;
5307 * We will get a create directory here if the Win32
5308 * app specified a security descriptor in the
5309 * CreateDirectory() call.
5313 status = open_directory(
5314 conn, req, smb_fname, access_mask, share_access,
5315 create_disposition, create_options, file_attributes,
5320 * Ordinary file case.
5323 status = file_new(req, conn, &fsp);
5324 if(!NT_STATUS_IS_OK(status)) {
5328 status = fsp_set_smb_fname(fsp, smb_fname);
5329 if (!NT_STATUS_IS_OK(status)) {
5335 * We're opening the stream element of a
5336 * base_fsp we already opened. Set up the
5339 fsp->base_fsp = base_fsp;
5342 if (allocation_size) {
5343 fsp->initial_allocation_size = smb_roundup(fsp->conn,
5347 status = open_file_ntcreate(conn,
5360 if(!NT_STATUS_IS_OK(status)) {
5361 file_free(req, fsp);
5365 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
5367 /* A stream open never opens a directory */
5370 status = NT_STATUS_FILE_IS_A_DIRECTORY;
5375 * Fail the open if it was explicitly a non-directory
5379 if (create_options & FILE_NON_DIRECTORY_FILE) {
5380 status = NT_STATUS_FILE_IS_A_DIRECTORY;
5385 status = open_directory(
5386 conn, req, smb_fname, access_mask,
5387 share_access, create_disposition,
5388 create_options, file_attributes,
5393 if (!NT_STATUS_IS_OK(status)) {
5397 fsp->base_fsp = base_fsp;
5399 if ((ea_list != NULL) &&
5400 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
5401 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
5402 if (!NT_STATUS_IS_OK(status)) {
5407 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
5408 status = NT_STATUS_ACCESS_DENIED;
5412 /* Save the requested allocation size. */
5413 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
5414 if ((allocation_size > fsp->fsp_name->st.st_ex_size)
5415 && !(fsp->is_directory))
5417 fsp->initial_allocation_size = smb_roundup(
5418 fsp->conn, allocation_size);
5419 if (vfs_allocate_file_space(
5420 fsp, fsp->initial_allocation_size) == -1) {
5421 status = NT_STATUS_DISK_FULL;
5425 fsp->initial_allocation_size = smb_roundup(
5426 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
5429 fsp->initial_allocation_size = 0;
5432 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
5433 fsp->base_fsp == NULL) {
5436 * According to the MS documentation, the only time the security
5437 * descriptor is applied to the opened file is iff we *created* the
5438 * file; an existing file stays the same.
5440 * Also, it seems (from observation) that you can open the file with
5441 * any access mask but you can still write the sd. We need to override
5442 * the granted access before we call set_sd
5443 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
5446 uint32_t sec_info_sent;
5447 uint32_t saved_access_mask = fsp->access_mask;
5449 sec_info_sent = get_sec_info(sd);
5451 fsp->access_mask = FILE_GENERIC_ALL;
5453 if (sec_info_sent & (SECINFO_OWNER|
5457 status = set_sd(fsp, sd, sec_info_sent);
5460 fsp->access_mask = saved_access_mask;
5462 if (!NT_STATUS_IS_OK(status)) {
5465 } else if (lp_inherit_acls(SNUM(conn))) {
5466 /* Inherit from parent. Errors here are not fatal. */
5467 status = inherit_new_acl(fsp);
5468 if (!NT_STATUS_IS_OK(status)) {
5469 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
5471 nt_errstr(status) ));
5476 if ((conn->fs_capabilities & FILE_FILE_COMPRESSION)
5477 && (create_options & FILE_NO_COMPRESSION)
5478 && (info == FILE_WAS_CREATED)) {
5479 status = SMB_VFS_SET_COMPRESSION(conn, fsp, fsp,
5480 COMPRESSION_FORMAT_NONE);
5481 if (!NT_STATUS_IS_OK(status)) {
5482 DEBUG(1, ("failed to disable compression: %s\n",
5483 nt_errstr(status)));
5487 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
5490 if (pinfo != NULL) {
5494 smb_fname->st = fsp->fsp_name->st;
5496 return NT_STATUS_OK;
5499 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
5502 if (base_fsp && fsp->base_fsp == base_fsp) {
5504 * The close_file below will close
5509 close_file(req, fsp, ERROR_CLOSE);
5512 if (base_fsp != NULL) {
5513 close_file(req, base_fsp, ERROR_CLOSE);
5520 * Calculate the full path name given a relative fid.
5522 NTSTATUS get_relative_fid_filename(connection_struct *conn,
5523 struct smb_request *req,
5524 uint16_t root_dir_fid,
5525 const struct smb_filename *smb_fname,
5526 struct smb_filename **smb_fname_out)
5528 files_struct *dir_fsp;
5529 char *parent_fname = NULL;
5530 char *new_base_name = NULL;
5531 uint32_t ucf_flags = ucf_flags_from_smb_request(req);
5534 if (root_dir_fid == 0 || !smb_fname) {
5535 status = NT_STATUS_INTERNAL_ERROR;
5539 dir_fsp = file_fsp(req, root_dir_fid);
5541 if (dir_fsp == NULL) {
5542 status = NT_STATUS_INVALID_HANDLE;
5546 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
5547 status = NT_STATUS_INVALID_HANDLE;
5551 if (!dir_fsp->is_directory) {
5554 * Check to see if this is a mac fork of some kind.
5557 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
5558 is_ntfs_stream_smb_fname(smb_fname)) {
5559 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
5564 we need to handle the case when we get a
5565 relative open relative to a file and the
5566 pathname is blank - this is a reopen!
5567 (hint from demyn plantenberg)
5570 status = NT_STATUS_INVALID_HANDLE;
5574 if (ISDOT(dir_fsp->fsp_name->base_name)) {
5576 * We're at the toplevel dir, the final file name
5577 * must not contain ./, as this is filtered out
5578 * normally by srvstr_get_path and unix_convert
5579 * explicitly rejects paths containing ./.
5581 parent_fname = talloc_strdup(talloc_tos(), "");
5582 if (parent_fname == NULL) {
5583 status = NT_STATUS_NO_MEMORY;
5587 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
5590 * Copy in the base directory name.
5593 parent_fname = talloc_array(talloc_tos(), char,
5595 if (parent_fname == NULL) {
5596 status = NT_STATUS_NO_MEMORY;
5599 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
5603 * Ensure it ends in a '/'.
5604 * We used TALLOC_SIZE +2 to add space for the '/'.
5608 && (parent_fname[dir_name_len-1] != '\\')
5609 && (parent_fname[dir_name_len-1] != '/')) {
5610 parent_fname[dir_name_len] = '/';
5611 parent_fname[dir_name_len+1] = '\0';
5615 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
5616 smb_fname->base_name);
5617 if (new_base_name == NULL) {
5618 status = NT_STATUS_NO_MEMORY;
5622 status = filename_convert(req,
5629 if (!NT_STATUS_IS_OK(status)) {
5634 TALLOC_FREE(parent_fname);
5635 TALLOC_FREE(new_base_name);
5639 NTSTATUS create_file_default(connection_struct *conn,
5640 struct smb_request *req,
5641 uint16_t root_dir_fid,
5642 struct smb_filename *smb_fname,
5643 uint32_t access_mask,
5644 uint32_t share_access,
5645 uint32_t create_disposition,
5646 uint32_t create_options,
5647 uint32_t file_attributes,
5648 uint32_t oplock_request,
5649 struct smb2_lease *lease,
5650 uint64_t allocation_size,
5651 uint32_t private_flags,
5652 struct security_descriptor *sd,
5653 struct ea_list *ea_list,
5654 files_struct **result,
5656 const struct smb2_create_blobs *in_context_blobs,
5657 struct smb2_create_blobs *out_context_blobs)
5659 int info = FILE_WAS_OPENED;
5660 files_struct *fsp = NULL;
5662 bool stream_name = false;
5664 DBG_DEBUG("create_file: access_mask = 0x%x "
5665 "file_attributes = 0x%x, share_access = 0x%x, "
5666 "create_disposition = 0x%x create_options = 0x%x "
5667 "oplock_request = 0x%x "
5668 "private_flags = 0x%x "
5669 "root_dir_fid = 0x%x, ea_list = %p, sd = %p, "
5671 (unsigned int)access_mask,
5672 (unsigned int)file_attributes,
5673 (unsigned int)share_access,
5674 (unsigned int)create_disposition,
5675 (unsigned int)create_options,
5676 (unsigned int)oplock_request,
5677 (unsigned int)private_flags,
5678 (unsigned int)root_dir_fid,
5679 ea_list, sd, smb_fname_str_dbg(smb_fname));
5682 * Calculate the filename from the root_dir_if if necessary.
5685 if (root_dir_fid != 0) {
5686 struct smb_filename *smb_fname_out = NULL;
5687 status = get_relative_fid_filename(conn, req, root_dir_fid,
5688 smb_fname, &smb_fname_out);
5689 if (!NT_STATUS_IS_OK(status)) {
5692 smb_fname = smb_fname_out;
5696 * Check to see if this is a mac fork of some kind.
5699 stream_name = is_ntfs_stream_smb_fname(smb_fname);
5701 enum FAKE_FILE_TYPE fake_file_type;
5703 fake_file_type = is_fake_file(smb_fname);
5705 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
5708 * Here we go! support for changing the disk quotas
5711 * We need to fake up to open this MAGIC QUOTA file
5712 * and return a valid FID.
5714 * w2k close this file directly after openening xp
5715 * also tries a QUERY_FILE_INFO on the file and then
5718 status = open_fake_file(req, conn, req->vuid,
5719 fake_file_type, smb_fname,
5721 if (!NT_STATUS_IS_OK(status)) {
5725 ZERO_STRUCT(smb_fname->st);
5729 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
5730 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
5735 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
5737 smb_fname->stream_name = NULL;
5738 /* We have to handle this error here. */
5739 if (create_options & FILE_DIRECTORY_FILE) {
5740 status = NT_STATUS_NOT_A_DIRECTORY;
5743 if (req != NULL && req->posix_pathnames) {
5744 ret = SMB_VFS_LSTAT(conn, smb_fname);
5746 ret = SMB_VFS_STAT(conn, smb_fname);
5749 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
5750 status = NT_STATUS_FILE_IS_A_DIRECTORY;
5755 status = create_file_unixpath(
5756 conn, req, smb_fname, access_mask, share_access,
5757 create_disposition, create_options, file_attributes,
5758 oplock_request, lease, allocation_size, private_flags,
5762 if (!NT_STATUS_IS_OK(status)) {
5767 DEBUG(10, ("create_file: info=%d\n", info));
5770 if (pinfo != NULL) {
5773 return NT_STATUS_OK;
5776 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
5779 close_file(req, fsp, ERROR_CLOSE);