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;
262 if (!parent_dirname(talloc_tos(),
263 smb_fname->base_name,
266 return NT_STATUS_NO_MEMORY;
269 parent_smb_fname = synthetic_smb_fname(talloc_tos(),
274 if (parent_smb_fname == NULL) {
275 return NT_STATUS_NO_MEMORY;
278 if (get_current_uid(conn) == (uid_t)0) {
279 /* I'm sorry sir, I didn't know you were root... */
280 DEBUG(10,("check_parent_access: root override "
281 "on %s. Granting 0x%x\n",
282 smb_fname_str_dbg(smb_fname),
283 (unsigned int)access_mask ));
287 status = SMB_VFS_GET_NT_ACL(conn,
293 if (!NT_STATUS_IS_OK(status)) {
294 DEBUG(5,("check_parent_access: SMB_VFS_GET_NT_ACL failed for "
295 "%s with error %s\n",
302 * If we can access the path to this file, by
303 * default we have FILE_READ_ATTRIBUTES from the
304 * containing directory. See the section:
305 * "Algorithm to Check Access to an Existing File"
308 * se_file_access_check() also takes care of
309 * owner WRITE_DAC and READ_CONTROL.
311 status = se_file_access_check(parent_sd,
312 get_current_nttok(conn),
314 (access_mask & ~FILE_READ_ATTRIBUTES),
316 if(!NT_STATUS_IS_OK(status)) {
317 DEBUG(5,("check_parent_access: access check "
318 "on directory %s for "
319 "path %s for mask 0x%x returned (0x%x) %s\n",
321 smb_fname->base_name,
324 nt_errstr(status) ));
328 if (!(access_mask & (SEC_DIR_ADD_FILE | SEC_DIR_ADD_SUBDIR))) {
331 if (!lp_check_parent_directory_delete_on_close(SNUM(conn))) {
335 /* Check if the directory has delete-on-close set */
336 ret = SMB_VFS_STAT(conn, parent_smb_fname);
338 status = map_nt_error_from_unix(errno);
342 id = SMB_VFS_FILE_ID_CREATE(conn, &parent_smb_fname->st);
344 status = file_name_hash(conn, parent_smb_fname->base_name, &name_hash);
345 if (!NT_STATUS_IS_OK(status)) {
349 lck = get_existing_share_mode_lock(talloc_tos(), id);
351 status = NT_STATUS_OK;
355 delete_on_close_set = is_delete_on_close_set(lck, name_hash);
356 if (delete_on_close_set) {
357 status = NT_STATUS_DELETE_PENDING;
361 status = NT_STATUS_OK;
365 TALLOC_FREE(parent_smb_fname);
369 /****************************************************************************
370 Ensure when opening a base file for a stream open that we have permissions
371 to do so given the access mask on the base file.
372 ****************************************************************************/
374 static NTSTATUS check_base_file_access(struct connection_struct *conn,
375 struct smb_filename *smb_fname,
376 uint32_t access_mask)
380 status = smbd_calculate_access_mask(conn, smb_fname,
384 if (!NT_STATUS_IS_OK(status)) {
385 DEBUG(10, ("smbd_calculate_access_mask "
386 "on file %s returned %s\n",
387 smb_fname_str_dbg(smb_fname),
392 if (access_mask & (FILE_WRITE_DATA|FILE_APPEND_DATA)) {
394 if (!CAN_WRITE(conn)) {
395 return NT_STATUS_ACCESS_DENIED;
397 dosattrs = dos_mode(conn, smb_fname);
398 if (IS_DOS_READONLY(dosattrs)) {
399 return NT_STATUS_ACCESS_DENIED;
403 return smbd_check_access_rights(conn,
409 /****************************************************************************
410 Handle differing symlink errno's
411 ****************************************************************************/
413 static int link_errno_convert(int err)
415 #if defined(ENOTSUP) && defined(OSF1)
416 /* handle special Tru64 errno */
417 if (err == ENOTSUP) {
422 /* fix broken NetBSD errno */
427 /* fix broken FreeBSD errno */
434 static int non_widelink_open(struct connection_struct *conn,
435 const struct smb_filename *conn_rootdir_fname,
437 struct smb_filename *smb_fname,
440 unsigned int link_depth);
442 /****************************************************************************
443 Follow a symlink in userspace.
444 ****************************************************************************/
446 static int process_symlink_open(struct connection_struct *conn,
447 const struct smb_filename *conn_rootdir_fname,
449 struct smb_filename *smb_fname,
452 unsigned int link_depth)
455 char *link_target = NULL;
456 struct smb_filename target_fname = {0};
458 struct smb_filename *oldwd_fname = NULL;
459 size_t rootdir_len = 0;
460 struct smb_filename *resolved_fname = NULL;
461 char *resolved_name = NULL;
462 bool matched = false;
466 * Ensure we don't get stuck in a symlink loop.
469 if (link_depth >= 20) {
474 /* Allocate space for the link target. */
475 link_target = talloc_array(talloc_tos(), char, PATH_MAX);
476 if (link_target == NULL) {
481 /* Read the link target. */
482 link_len = SMB_VFS_READLINK(conn,
486 if (link_len == -1) {
490 /* Ensure it's at least null terminated. */
491 link_target[link_len] = '\0';
492 target_fname = (struct smb_filename){ .base_name = link_target };
494 /* Convert to an absolute path. */
495 resolved_fname = SMB_VFS_REALPATH(conn, talloc_tos(), &target_fname);
496 if (resolved_fname == NULL) {
499 resolved_name = resolved_fname->base_name;
502 * We know conn_rootdir starts with '/' and
503 * does not end in '/'. FIXME ! Should we
506 rootdir_len = strlen(conn_rootdir_fname->base_name);
508 matched = (strncmp(conn_rootdir_fname->base_name,
517 * Turn into a path relative to the share root.
519 if (resolved_name[rootdir_len] == '\0') {
520 /* Link to the root of the share. */
521 TALLOC_FREE(smb_fname->base_name);
522 smb_fname->base_name = talloc_strdup(smb_fname, ".");
523 } else if (resolved_name[rootdir_len] == '/') {
524 TALLOC_FREE(smb_fname->base_name);
525 smb_fname->base_name = talloc_strdup(smb_fname,
526 &resolved_name[rootdir_len+1]);
532 if (smb_fname->base_name == NULL) {
537 oldwd_fname = vfs_GetWd(talloc_tos(), conn);
538 if (oldwd_fname == NULL) {
542 /* Ensure we operate from the root of the share. */
543 if (vfs_ChDir(conn, conn_rootdir_fname) == -1) {
547 /* And do it all again.. */
548 fd = non_widelink_open(conn,
561 TALLOC_FREE(resolved_fname);
562 TALLOC_FREE(link_target);
563 if (oldwd_fname != NULL) {
564 int ret = vfs_ChDir(conn, oldwd_fname);
566 smb_panic("unable to get back to old directory\n");
568 TALLOC_FREE(oldwd_fname);
570 if (saved_errno != 0) {
576 /****************************************************************************
578 ****************************************************************************/
580 static int non_widelink_open(struct connection_struct *conn,
581 const struct smb_filename *conn_rootdir_fname,
583 struct smb_filename *smb_fname,
586 unsigned int link_depth)
590 struct smb_filename *smb_fname_rel = NULL;
592 struct smb_filename *oldwd_fname = NULL;
593 char *parent_dir = NULL;
594 struct smb_filename parent_dir_fname = {0};
595 const char *final_component = NULL;
596 bool is_directory = false;
600 if (flags & O_DIRECTORY) {
606 parent_dir = talloc_strdup(talloc_tos(), smb_fname->base_name);
607 if (parent_dir == NULL) {
612 final_component = ".";
614 ok = parent_dirname(talloc_tos(),
615 smb_fname->base_name,
624 parent_dir_fname = (struct smb_filename) { .base_name = parent_dir };
626 oldwd_fname = vfs_GetWd(talloc_tos(), conn);
627 if (oldwd_fname == NULL) {
631 /* Pin parent directory in place. */
632 if (vfs_ChDir(conn, &parent_dir_fname) == -1) {
636 smb_fname_rel = synthetic_smb_fname(talloc_tos(),
638 smb_fname->stream_name,
641 if (smb_fname_rel == NULL) {
642 saved_errno = ENOMEM;
646 /* Ensure the relative path is below the share. */
647 status = check_reduced_name(conn, &parent_dir_fname, smb_fname_rel);
648 if (!NT_STATUS_IS_OK(status)) {
649 saved_errno = map_errno_from_nt_status(status);
656 struct smb_filename *tmp_name = fsp->fsp_name;
657 fsp->fsp_name = smb_fname_rel;
658 fd = SMB_VFS_OPEN(conn, smb_fname_rel, fsp, flags, mode);
659 fsp->fsp_name = tmp_name;
663 saved_errno = link_errno_convert(errno);
665 * Trying to open a symlink to a directory with O_NOFOLLOW and
666 * O_DIRECTORY can return either of ELOOP and ENOTDIR. So
667 * ENOTDIR really means: might be a symlink, but we're not sure.
668 * In this case, we just assume there's a symlink. If we were
669 * wrong, process_symlink_open() will return EINVAL. We check
670 * this below, and fall back to returning the initial
673 * BUG: https://bugzilla.samba.org/show_bug.cgi?id=12860
675 if (saved_errno == ELOOP || saved_errno == ENOTDIR) {
676 if (fsp->posix_flags & FSP_POSIX_FLAGS_OPEN) {
677 /* Never follow symlinks on posix open. */
680 if (!lp_follow_symlinks(SNUM(conn))) {
681 /* Explicitly no symlinks. */
685 * We may have a symlink. Follow in userspace
686 * to ensure it's under the share definition.
688 fd = process_symlink_open(conn,
696 if (saved_errno == ENOTDIR &&
699 * O_DIRECTORY on neither a directory,
700 * nor a symlink. Just return
701 * saved_errno from initial open()
706 link_errno_convert(errno);
713 TALLOC_FREE(parent_dir);
714 TALLOC_FREE(smb_fname_rel);
716 if (oldwd_fname != NULL) {
717 int ret = vfs_ChDir(conn, oldwd_fname);
719 smb_panic("unable to get back to old directory\n");
721 TALLOC_FREE(oldwd_fname);
723 if (saved_errno != 0) {
729 /****************************************************************************
730 fd support routines - attempt to do a dos_open.
731 ****************************************************************************/
733 NTSTATUS fd_open(struct connection_struct *conn,
738 struct smb_filename *smb_fname = fsp->fsp_name;
739 NTSTATUS status = NT_STATUS_OK;
742 * Never follow symlinks on a POSIX client. The
743 * client should be doing this.
746 if ((fsp->posix_flags & FSP_POSIX_FLAGS_OPEN) || !lp_follow_symlinks(SNUM(conn))) {
750 /* Ensure path is below share definition. */
751 if (!lp_widelinks(SNUM(conn))) {
752 struct smb_filename *conn_rootdir_fname = NULL;
753 const char *conn_rootdir = SMB_VFS_CONNECTPATH(conn,
757 if (conn_rootdir == NULL) {
758 return NT_STATUS_NO_MEMORY;
760 conn_rootdir_fname = synthetic_smb_fname(talloc_tos(),
765 if (conn_rootdir_fname == NULL) {
766 return NT_STATUS_NO_MEMORY;
770 * Only follow symlinks within a share
773 fsp->fh->fd = non_widelink_open(conn,
780 if (fsp->fh->fd == -1) {
783 TALLOC_FREE(conn_rootdir_fname);
784 if (saved_errno != 0) {
788 fsp->fh->fd = SMB_VFS_OPEN(conn, smb_fname, fsp, flags, mode);
791 if (fsp->fh->fd == -1) {
792 int posix_errno = link_errno_convert(errno);
793 status = map_nt_error_from_unix(posix_errno);
794 if (errno == EMFILE) {
795 static time_t last_warned = 0L;
797 if (time((time_t *) NULL) > last_warned) {
798 DEBUG(0,("Too many open files, unable "
799 "to open more! smbd's max "
801 lp_max_open_files()));
802 last_warned = time((time_t *) NULL);
808 DEBUG(10,("fd_open: name %s, flags = 0%o mode = 0%o, fd = %d. %s\n",
809 smb_fname_str_dbg(smb_fname), flags, (int)mode, fsp->fh->fd,
810 (fsp->fh->fd == -1) ? strerror(errno) : "" ));
815 /****************************************************************************
816 Close the file associated with a fsp.
817 ****************************************************************************/
819 NTSTATUS fd_close(files_struct *fsp)
826 if (fsp->fh->fd == -1) {
827 return NT_STATUS_OK; /* What we used to call a stat open. */
829 if (fsp->fh->ref_count > 1) {
830 return NT_STATUS_OK; /* Shared handle. Only close last reference. */
833 ret = SMB_VFS_CLOSE(fsp);
836 return map_nt_error_from_unix(errno);
841 /****************************************************************************
842 Change the ownership of a file to that of the parent directory.
843 Do this by fd if possible.
844 ****************************************************************************/
846 void change_file_owner_to_parent(connection_struct *conn,
847 const char *inherit_from_dir,
850 struct smb_filename *smb_fname_parent;
853 smb_fname_parent = synthetic_smb_fname(talloc_tos(),
858 if (smb_fname_parent == NULL) {
862 ret = SMB_VFS_STAT(conn, smb_fname_parent);
864 DEBUG(0,("change_file_owner_to_parent: failed to stat parent "
865 "directory %s. Error was %s\n",
866 smb_fname_str_dbg(smb_fname_parent),
868 TALLOC_FREE(smb_fname_parent);
872 if (smb_fname_parent->st.st_ex_uid == fsp->fsp_name->st.st_ex_uid) {
873 /* Already this uid - no need to change. */
874 DEBUG(10,("change_file_owner_to_parent: file %s "
875 "is already owned by uid %d\n",
877 (int)fsp->fsp_name->st.st_ex_uid ));
878 TALLOC_FREE(smb_fname_parent);
883 ret = SMB_VFS_FCHOWN(fsp, smb_fname_parent->st.st_ex_uid, (gid_t)-1);
886 DEBUG(0,("change_file_owner_to_parent: failed to fchown "
887 "file %s to parent directory uid %u. Error "
888 "was %s\n", fsp_str_dbg(fsp),
889 (unsigned int)smb_fname_parent->st.st_ex_uid,
892 DEBUG(10,("change_file_owner_to_parent: changed new file %s to "
893 "parent directory uid %u.\n", fsp_str_dbg(fsp),
894 (unsigned int)smb_fname_parent->st.st_ex_uid));
895 /* Ensure the uid entry is updated. */
896 fsp->fsp_name->st.st_ex_uid = smb_fname_parent->st.st_ex_uid;
899 TALLOC_FREE(smb_fname_parent);
902 static NTSTATUS change_dir_owner_to_parent(connection_struct *conn,
903 const char *inherit_from_dir,
904 struct smb_filename *smb_dname,
905 SMB_STRUCT_STAT *psbuf)
907 struct smb_filename *smb_fname_parent;
908 struct smb_filename *smb_fname_cwd = NULL;
909 struct smb_filename *saved_dir_fname = NULL;
910 TALLOC_CTX *ctx = talloc_tos();
911 NTSTATUS status = NT_STATUS_OK;
914 smb_fname_parent = synthetic_smb_fname(ctx,
919 if (smb_fname_parent == NULL) {
920 return NT_STATUS_NO_MEMORY;
923 ret = SMB_VFS_STAT(conn, smb_fname_parent);
925 status = map_nt_error_from_unix(errno);
926 DEBUG(0,("change_dir_owner_to_parent: failed to stat parent "
927 "directory %s. Error was %s\n",
928 smb_fname_str_dbg(smb_fname_parent),
933 /* We've already done an lstat into psbuf, and we know it's a
934 directory. If we can cd into the directory and the dev/ino
935 are the same then we can safely chown without races as
936 we're locking the directory in place by being in it. This
937 should work on any UNIX (thanks tridge :-). JRA.
940 saved_dir_fname = vfs_GetWd(ctx,conn);
941 if (!saved_dir_fname) {
942 status = map_nt_error_from_unix(errno);
943 DEBUG(0,("change_dir_owner_to_parent: failed to get "
944 "current working directory. Error was %s\n",
949 /* Chdir into the new path. */
950 if (vfs_ChDir(conn, smb_dname) == -1) {
951 status = map_nt_error_from_unix(errno);
952 DEBUG(0,("change_dir_owner_to_parent: failed to change "
953 "current working directory to %s. Error "
954 "was %s\n", smb_dname->base_name, strerror(errno) ));
958 smb_fname_cwd = synthetic_smb_fname(ctx, ".", NULL, NULL, 0);
959 if (smb_fname_cwd == NULL) {
960 status = NT_STATUS_NO_MEMORY;
964 ret = SMB_VFS_STAT(conn, smb_fname_cwd);
966 status = map_nt_error_from_unix(errno);
967 DEBUG(0,("change_dir_owner_to_parent: failed to stat "
968 "directory '.' (%s) Error was %s\n",
969 smb_dname->base_name, strerror(errno)));
973 /* Ensure we're pointing at the same place. */
974 if (smb_fname_cwd->st.st_ex_dev != psbuf->st_ex_dev ||
975 smb_fname_cwd->st.st_ex_ino != psbuf->st_ex_ino) {
976 DEBUG(0,("change_dir_owner_to_parent: "
977 "device/inode on directory %s changed. "
978 "Refusing to chown !\n",
979 smb_dname->base_name ));
980 status = NT_STATUS_ACCESS_DENIED;
984 if (smb_fname_parent->st.st_ex_uid == smb_fname_cwd->st.st_ex_uid) {
985 /* Already this uid - no need to change. */
986 DEBUG(10,("change_dir_owner_to_parent: directory %s "
987 "is already owned by uid %d\n",
988 smb_dname->base_name,
989 (int)smb_fname_cwd->st.st_ex_uid ));
990 status = NT_STATUS_OK;
995 ret = SMB_VFS_LCHOWN(conn,
997 smb_fname_parent->st.st_ex_uid,
1001 status = map_nt_error_from_unix(errno);
1002 DEBUG(10,("change_dir_owner_to_parent: failed to chown "
1003 "directory %s to parent directory uid %u. "
1005 smb_dname->base_name,
1006 (unsigned int)smb_fname_parent->st.st_ex_uid,
1009 DEBUG(10,("change_dir_owner_to_parent: changed ownership of new "
1010 "directory %s to parent directory uid %u.\n",
1011 smb_dname->base_name,
1012 (unsigned int)smb_fname_parent->st.st_ex_uid ));
1013 /* Ensure the uid entry is updated. */
1014 psbuf->st_ex_uid = smb_fname_parent->st.st_ex_uid;
1018 vfs_ChDir(conn, saved_dir_fname);
1020 TALLOC_FREE(saved_dir_fname);
1021 TALLOC_FREE(smb_fname_parent);
1022 TALLOC_FREE(smb_fname_cwd);
1026 /****************************************************************************
1027 Open a file - returning a guaranteed ATOMIC indication of if the
1028 file was created or not.
1029 ****************************************************************************/
1031 static NTSTATUS fd_open_atomic(struct connection_struct *conn,
1037 NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
1038 NTSTATUS retry_status;
1039 bool file_existed = VALID_STAT(fsp->fsp_name->st);
1042 *file_created = false;
1044 if (!(flags & O_CREAT)) {
1046 * We're not creating the file, just pass through.
1048 return fd_open(conn, fsp, flags, mode);
1051 if (flags & O_EXCL) {
1053 * Fail if already exists, just pass through.
1055 status = fd_open(conn, fsp, flags, mode);
1058 * Here we've opened with O_CREAT|O_EXCL. If that went
1059 * NT_STATUS_OK, we *know* we created this file.
1061 *file_created = NT_STATUS_IS_OK(status);
1067 * Now it gets tricky. We have O_CREAT, but not O_EXCL.
1068 * To know absolutely if we created the file or not,
1069 * we can never call O_CREAT without O_EXCL. So if
1070 * we think the file existed, try without O_CREAT|O_EXCL.
1071 * If we think the file didn't exist, try with
1074 * The big problem here is dangling symlinks. Opening
1075 * without O_NOFOLLOW means both bad symlink
1076 * and missing path return -1, ENOENT from open(). As POSIX
1077 * is pathname based it's not possible to tell
1078 * the difference between these two cases in a
1079 * non-racy way, so change to try only two attempts before
1082 * We don't have this problem for the O_NOFOLLOW
1083 * case as it just returns NT_STATUS_OBJECT_PATH_NOT_FOUND
1084 * mapped from the ELOOP POSIX error.
1090 curr_flags &= ~(O_CREAT);
1091 retry_status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
1093 curr_flags |= O_EXCL;
1094 retry_status = NT_STATUS_OBJECT_NAME_COLLISION;
1097 status = fd_open(conn, fsp, curr_flags, mode);
1098 if (NT_STATUS_IS_OK(status)) {
1099 if (!file_existed) {
1100 *file_created = true;
1102 return NT_STATUS_OK;
1104 if (!NT_STATUS_EQUAL(status, retry_status)) {
1111 * Keep file_existed up to date for clarity.
1113 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
1114 file_existed = false;
1115 curr_flags |= O_EXCL;
1116 DBG_DEBUG("file %s did not exist. Retry.\n",
1117 smb_fname_str_dbg(fsp->fsp_name));
1119 file_existed = true;
1120 curr_flags &= ~(O_CREAT);
1121 DBG_DEBUG("file %s existed. Retry.\n",
1122 smb_fname_str_dbg(fsp->fsp_name));
1125 status = fd_open(conn, fsp, curr_flags, mode);
1127 if (NT_STATUS_IS_OK(status) && (!file_existed)) {
1128 *file_created = true;
1134 /****************************************************************************
1136 ****************************************************************************/
1138 static NTSTATUS open_file(files_struct *fsp,
1139 connection_struct *conn,
1140 struct smb_request *req,
1141 const char *parent_dir,
1144 uint32_t access_mask, /* client requested access mask. */
1145 uint32_t open_access_mask, /* what we're actually using in the open. */
1146 bool *p_file_created)
1148 struct smb_filename *smb_fname = fsp->fsp_name;
1149 NTSTATUS status = NT_STATUS_OK;
1150 int accmode = (flags & O_ACCMODE);
1151 int local_flags = flags;
1152 bool file_existed = VALID_STAT(fsp->fsp_name->st);
1157 /* Check permissions */
1160 * This code was changed after seeing a client open request
1161 * containing the open mode of (DENY_WRITE/read-only) with
1162 * the 'create if not exist' bit set. The previous code
1163 * would fail to open the file read only on a read-only share
1164 * as it was checking the flags parameter directly against O_RDONLY,
1165 * this was failing as the flags parameter was set to O_RDONLY|O_CREAT.
1169 if (!CAN_WRITE(conn)) {
1170 /* It's a read-only share - fail if we wanted to write. */
1171 if(accmode != O_RDONLY || (flags & O_TRUNC) || (flags & O_APPEND)) {
1172 DEBUG(3,("Permission denied opening %s\n",
1173 smb_fname_str_dbg(smb_fname)));
1174 return NT_STATUS_ACCESS_DENIED;
1176 if (flags & O_CREAT) {
1177 /* We don't want to write - but we must make sure that
1178 O_CREAT doesn't create the file if we have write
1179 access into the directory.
1181 flags &= ~(O_CREAT|O_EXCL);
1182 local_flags &= ~(O_CREAT|O_EXCL);
1187 * This little piece of insanity is inspired by the
1188 * fact that an NT client can open a file for O_RDONLY,
1189 * but set the create disposition to FILE_EXISTS_TRUNCATE.
1190 * If the client *can* write to the file, then it expects to
1191 * truncate the file, even though it is opening for readonly.
1192 * Quicken uses this stupid trick in backup file creation...
1193 * Thanks *greatly* to "David W. Chapman Jr." <dwcjr@inethouston.net>
1194 * for helping track this one down. It didn't bite us in 2.0.x
1195 * as we always opened files read-write in that release. JRA.
1198 if ((accmode == O_RDONLY) && ((flags & O_TRUNC) == O_TRUNC)) {
1199 DEBUG(10,("open_file: truncate requested on read-only open "
1200 "for file %s\n", smb_fname_str_dbg(smb_fname)));
1201 local_flags = (flags & ~O_ACCMODE)|O_RDWR;
1204 if ((open_access_mask & (FILE_READ_DATA|FILE_WRITE_DATA|FILE_APPEND_DATA|FILE_EXECUTE)) ||
1205 (!file_existed && (local_flags & O_CREAT)) ||
1206 ((local_flags & O_TRUNC) == O_TRUNC) ) {
1210 #if defined(O_NONBLOCK) && defined(S_ISFIFO)
1212 * We would block on opening a FIFO with no one else on the
1213 * other end. Do what we used to do and add O_NONBLOCK to the
1217 if (file_existed && S_ISFIFO(smb_fname->st.st_ex_mode)) {
1218 local_flags &= ~O_TRUNC; /* Can't truncate a FIFO. */
1219 local_flags |= O_NONBLOCK;
1223 /* Don't create files with Microsoft wildcard characters. */
1224 if (fsp->base_fsp) {
1226 * wildcard characters are allowed in stream names
1227 * only test the basefilename
1229 wild = fsp->base_fsp->fsp_name->base_name;
1231 wild = smb_fname->base_name;
1233 if ((local_flags & O_CREAT) && !file_existed &&
1234 !(fsp->posix_flags & FSP_POSIX_FLAGS_PATHNAMES) &&
1235 ms_has_wild(wild)) {
1236 return NT_STATUS_OBJECT_NAME_INVALID;
1239 /* Can we access this file ? */
1240 if (!fsp->base_fsp) {
1241 /* Only do this check on non-stream open. */
1243 status = smbd_check_access_rights(conn,
1248 if (!NT_STATUS_IS_OK(status)) {
1249 DEBUG(10, ("open_file: "
1250 "smbd_check_access_rights "
1251 "on file %s returned %s\n",
1252 smb_fname_str_dbg(smb_fname),
1253 nt_errstr(status)));
1256 if (!NT_STATUS_IS_OK(status) &&
1257 !NT_STATUS_EQUAL(status,
1258 NT_STATUS_OBJECT_NAME_NOT_FOUND))
1263 if (NT_STATUS_EQUAL(status,
1264 NT_STATUS_OBJECT_NAME_NOT_FOUND))
1266 DEBUG(10, ("open_file: "
1267 "file %s vanished since we "
1268 "checked for existence.\n",
1269 smb_fname_str_dbg(smb_fname)));
1270 file_existed = false;
1271 SET_STAT_INVALID(fsp->fsp_name->st);
1275 if (!file_existed) {
1276 if (!(local_flags & O_CREAT)) {
1277 /* File didn't exist and no O_CREAT. */
1278 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1281 status = check_parent_access(conn,
1284 if (!NT_STATUS_IS_OK(status)) {
1285 DEBUG(10, ("open_file: "
1286 "check_parent_access on "
1287 "file %s returned %s\n",
1288 smb_fname_str_dbg(smb_fname),
1289 nt_errstr(status) ));
1296 * Actually do the open - if O_TRUNC is needed handle it
1297 * below under the share mode lock.
1299 status = fd_open_atomic(conn, fsp, local_flags & ~O_TRUNC,
1300 unx_mode, p_file_created);
1301 if (!NT_STATUS_IS_OK(status)) {
1302 DEBUG(3,("Error opening file %s (%s) (local_flags=%d) "
1303 "(flags=%d)\n", smb_fname_str_dbg(smb_fname),
1304 nt_errstr(status),local_flags,flags));
1308 if (local_flags & O_NONBLOCK) {
1310 * GPFS can return ETIMEDOUT for pread on
1311 * nonblocking file descriptors when files
1312 * migrated to tape need to be recalled. I
1313 * could imagine this happens elsehwere
1314 * too. With blocking file descriptors this
1317 ret = set_blocking(fsp->fh->fd, true);
1319 status = map_nt_error_from_unix(errno);
1320 DBG_WARNING("Could not set fd to blocking: "
1321 "%s\n", strerror(errno));
1327 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
1329 /* If we have an fd, this stat should succeed. */
1330 DEBUG(0,("Error doing fstat on open file %s "
1332 smb_fname_str_dbg(smb_fname),
1334 status = map_nt_error_from_unix(errno);
1339 if (*p_file_created) {
1340 /* We created this file. */
1342 bool need_re_stat = false;
1343 /* Do all inheritance work after we've
1344 done a successful fstat call and filled
1345 in the stat struct in fsp->fsp_name. */
1347 /* Inherit the ACL if required */
1348 if (lp_inherit_permissions(SNUM(conn))) {
1349 inherit_access_posix_acl(conn, parent_dir,
1352 need_re_stat = true;
1355 /* Change the owner if required. */
1356 if (lp_inherit_owner(SNUM(conn)) != INHERIT_OWNER_NO) {
1357 change_file_owner_to_parent(conn, parent_dir,
1359 need_re_stat = true;
1363 ret = SMB_VFS_FSTAT(fsp, &smb_fname->st);
1364 /* If we have an fd, this stat should succeed. */
1366 DEBUG(0,("Error doing fstat on open file %s "
1368 smb_fname_str_dbg(smb_fname),
1373 notify_fname(conn, NOTIFY_ACTION_ADDED,
1374 FILE_NOTIFY_CHANGE_FILE_NAME,
1375 smb_fname->base_name);
1378 fsp->fh->fd = -1; /* What we used to call a stat open. */
1379 if (!file_existed) {
1380 /* File must exist for a stat open. */
1381 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
1384 status = smbd_check_access_rights(conn,
1389 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND) &&
1390 (fsp->posix_flags & FSP_POSIX_FLAGS_OPEN) &&
1391 S_ISLNK(smb_fname->st.st_ex_mode)) {
1392 /* This is a POSIX stat open for delete
1393 * or rename on a symlink that points
1394 * nowhere. Allow. */
1395 DEBUG(10,("open_file: allowing POSIX "
1396 "open on bad symlink %s\n",
1397 smb_fname_str_dbg(smb_fname)));
1398 status = NT_STATUS_OK;
1401 if (!NT_STATUS_IS_OK(status)) {
1402 DEBUG(10,("open_file: "
1403 "smbd_check_access_rights on file "
1405 smb_fname_str_dbg(smb_fname),
1406 nt_errstr(status) ));
1412 * POSIX allows read-only opens of directories. We don't
1413 * want to do this (we use a different code path for this)
1414 * so catch a directory open and return an EISDIR. JRA.
1417 if(S_ISDIR(smb_fname->st.st_ex_mode)) {
1420 return NT_STATUS_FILE_IS_A_DIRECTORY;
1423 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
1424 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
1425 fsp->file_pid = req ? req->smbpid : 0;
1426 fsp->can_lock = True;
1427 fsp->can_read = ((access_mask & FILE_READ_DATA) != 0);
1430 ((access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA)) != 0);
1431 fsp->print_file = NULL;
1432 fsp->modified = False;
1433 fsp->sent_oplock_break = NO_BREAK_SENT;
1434 fsp->is_directory = False;
1435 if (conn->aio_write_behind_list &&
1436 is_in_path(smb_fname->base_name, conn->aio_write_behind_list,
1437 conn->case_sensitive)) {
1438 fsp->aio_write_behind = True;
1441 fsp->wcp = NULL; /* Write cache pointer. */
1443 DEBUG(2,("%s opened file %s read=%s write=%s (numopen=%d)\n",
1444 conn->session_info->unix_info->unix_name,
1445 smb_fname_str_dbg(smb_fname),
1446 BOOLSTR(fsp->can_read), BOOLSTR(fsp->can_write),
1447 conn->num_files_open));
1450 return NT_STATUS_OK;
1453 /****************************************************************************
1454 Check if we can open a file with a share mode.
1455 Returns True if conflict, False if not.
1456 ****************************************************************************/
1458 static bool share_conflict(struct share_mode_entry *entry,
1459 uint32_t access_mask,
1460 uint32_t share_access)
1462 DEBUG(10,("share_conflict: entry->access_mask = 0x%x, "
1463 "entry->share_access = 0x%x, "
1464 "entry->private_options = 0x%x\n",
1465 (unsigned int)entry->access_mask,
1466 (unsigned int)entry->share_access,
1467 (unsigned int)entry->private_options));
1469 if (server_id_is_disconnected(&entry->pid)) {
1471 * note: cleanup should have been done by
1472 * delay_for_batch_oplocks()
1477 DEBUG(10,("share_conflict: access_mask = 0x%x, share_access = 0x%x\n",
1478 (unsigned int)access_mask, (unsigned int)share_access));
1480 if ((entry->access_mask & (FILE_WRITE_DATA|
1484 DELETE_ACCESS)) == 0) {
1485 DEBUG(10,("share_conflict: No conflict due to "
1486 "entry->access_mask = 0x%x\n",
1487 (unsigned int)entry->access_mask ));
1491 if ((access_mask & (FILE_WRITE_DATA|
1495 DELETE_ACCESS)) == 0) {
1496 DEBUG(10,("share_conflict: No conflict due to "
1497 "access_mask = 0x%x\n",
1498 (unsigned int)access_mask ));
1502 #if 1 /* JRA TEST - Superdebug. */
1503 #define CHECK_MASK(num, am, right, sa, share) \
1504 DEBUG(10,("share_conflict: [%d] am (0x%x) & right (0x%x) = 0x%x\n", \
1505 (unsigned int)(num), (unsigned int)(am), \
1506 (unsigned int)(right), (unsigned int)(am)&(right) )); \
1507 DEBUG(10,("share_conflict: [%d] sa (0x%x) & share (0x%x) = 0x%x\n", \
1508 (unsigned int)(num), (unsigned int)(sa), \
1509 (unsigned int)(share), (unsigned int)(sa)&(share) )); \
1510 if (((am) & (right)) && !((sa) & (share))) { \
1511 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
1512 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
1513 (unsigned int)(share) )); \
1517 #define CHECK_MASK(num, am, right, sa, share) \
1518 if (((am) & (right)) && !((sa) & (share))) { \
1519 DEBUG(10,("share_conflict: check %d conflict am = 0x%x, right = 0x%x, \
1520 sa = 0x%x, share = 0x%x\n", (num), (unsigned int)(am), (unsigned int)(right), (unsigned int)(sa), \
1521 (unsigned int)(share) )); \
1526 CHECK_MASK(1, entry->access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
1527 share_access, FILE_SHARE_WRITE);
1528 CHECK_MASK(2, access_mask, FILE_WRITE_DATA | FILE_APPEND_DATA,
1529 entry->share_access, FILE_SHARE_WRITE);
1531 CHECK_MASK(3, entry->access_mask, FILE_READ_DATA | FILE_EXECUTE,
1532 share_access, FILE_SHARE_READ);
1533 CHECK_MASK(4, access_mask, FILE_READ_DATA | FILE_EXECUTE,
1534 entry->share_access, FILE_SHARE_READ);
1536 CHECK_MASK(5, entry->access_mask, DELETE_ACCESS,
1537 share_access, FILE_SHARE_DELETE);
1538 CHECK_MASK(6, access_mask, DELETE_ACCESS,
1539 entry->share_access, FILE_SHARE_DELETE);
1541 DEBUG(10,("share_conflict: No conflict.\n"));
1545 #if defined(DEVELOPER)
1546 static void validate_my_share_entries(struct smbd_server_connection *sconn,
1547 const struct file_id id,
1549 struct share_mode_entry *share_entry)
1551 struct server_id self = messaging_server_id(sconn->msg_ctx);
1554 if (!serverid_equal(&self, &share_entry->pid)) {
1558 if (share_entry->op_mid == 0) {
1559 /* INTERNAL_OPEN_ONLY */
1563 if (!is_valid_share_mode_entry(share_entry)) {
1567 fsp = file_find_dif(sconn, id, share_entry->share_file_id);
1569 DBG_ERR("PANIC : %s\n",
1570 share_mode_str(talloc_tos(), num, &id,
1572 smb_panic("validate_my_share_entries: Cannot match a "
1573 "share entry with an open file\n");
1576 if (((uint16_t)fsp->oplock_type) != share_entry->op_type) {
1585 DBG_ERR("validate_my_share_entries: PANIC : %s\n",
1586 share_mode_str(talloc_tos(), num, &id,
1588 str = talloc_asprintf(talloc_tos(),
1589 "validate_my_share_entries: "
1590 "file %s, oplock_type = 0x%x, op_type = 0x%x\n",
1591 fsp->fsp_name->base_name,
1592 (unsigned int)fsp->oplock_type,
1593 (unsigned int)share_entry->op_type );
1599 bool is_stat_open(uint32_t access_mask)
1601 const uint32_t stat_open_bits =
1602 (SYNCHRONIZE_ACCESS|
1603 FILE_READ_ATTRIBUTES|
1604 FILE_WRITE_ATTRIBUTES);
1606 return (((access_mask & stat_open_bits) != 0) &&
1607 ((access_mask & ~stat_open_bits) == 0));
1610 static bool has_delete_on_close(struct share_mode_lock *lck,
1613 struct share_mode_data *d = lck->data;
1616 if (d->num_share_modes == 0) {
1619 if (!is_delete_on_close_set(lck, name_hash)) {
1622 for (i=0; i<d->num_share_modes; i++) {
1623 if (!share_mode_stale_pid(d, i)) {
1630 /****************************************************************************
1631 Deal with share modes
1632 Invariant: Share mode must be locked on entry and exit.
1633 Returns -1 on error, or number of share modes on success (may be zero).
1634 ****************************************************************************/
1636 static NTSTATUS open_mode_check(connection_struct *conn,
1637 struct share_mode_lock *lck,
1638 uint32_t access_mask,
1639 uint32_t share_access)
1643 if(lck->data->num_share_modes == 0) {
1644 return NT_STATUS_OK;
1647 if (is_stat_open(access_mask)) {
1648 /* Stat open that doesn't trigger oplock breaks or share mode
1649 * checks... ! JRA. */
1650 return NT_STATUS_OK;
1654 * Check if the share modes will give us access.
1657 #if defined(DEVELOPER)
1658 for(i = 0; i < lck->data->num_share_modes; i++) {
1659 validate_my_share_entries(conn->sconn, lck->data->id, i,
1660 &lck->data->share_modes[i]);
1664 /* Now we check the share modes, after any oplock breaks. */
1665 for(i = 0; i < lck->data->num_share_modes; i++) {
1667 if (!is_valid_share_mode_entry(&lck->data->share_modes[i])) {
1671 /* someone else has a share lock on it, check to see if we can
1673 if (share_conflict(&lck->data->share_modes[i],
1674 access_mask, share_access)) {
1676 if (share_mode_stale_pid(lck->data, i)) {
1680 return NT_STATUS_SHARING_VIOLATION;
1684 return NT_STATUS_OK;
1688 * Send a break message to the oplock holder and delay the open for
1692 NTSTATUS send_break_message(struct messaging_context *msg_ctx,
1693 const struct file_id *id,
1694 const struct share_mode_entry *exclusive,
1698 char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
1699 struct server_id_buf tmp;
1701 DEBUG(10, ("Sending break request to PID %s\n",
1702 server_id_str_buf(exclusive->pid, &tmp)));
1704 /* Create the message. */
1705 share_mode_entry_to_message(msg, id, exclusive);
1707 /* Overload entry->op_type */
1709 * This is a cut from uint32_t to uint16_t, but so far only the lower 3
1710 * bits (LEASE_WRITE/HANDLE/READ are used anyway.
1712 SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET, break_to);
1714 status = messaging_send_buf(msg_ctx, exclusive->pid,
1715 MSG_SMB_BREAK_REQUEST,
1716 (uint8_t *)msg, sizeof(msg));
1717 if (!NT_STATUS_IS_OK(status)) {
1718 DEBUG(3, ("Could not send oplock break message: %s\n",
1719 nt_errstr(status)));
1726 * Do internal consistency checks on the share mode for a file.
1729 static bool validate_oplock_types(struct share_mode_lock *lck)
1731 struct share_mode_data *d = lck->data;
1733 bool ex_or_batch = false;
1734 bool level2 = false;
1735 bool no_oplock = false;
1736 uint32_t num_non_stat_opens = 0;
1739 for (i=0; i<d->num_share_modes; i++) {
1740 struct share_mode_entry *e = &d->share_modes[i];
1742 if (!is_valid_share_mode_entry(e)) {
1746 if (e->op_mid == 0) {
1747 /* INTERNAL_OPEN_ONLY */
1751 if (e->op_type == NO_OPLOCK && is_stat_open(e->access_mask)) {
1752 /* We ignore stat opens in the table - they
1753 always have NO_OPLOCK and never get or
1754 cause breaks. JRA. */
1758 num_non_stat_opens += 1;
1760 if (BATCH_OPLOCK_TYPE(e->op_type)) {
1761 /* batch - can only be one. */
1762 if (share_mode_stale_pid(d, i)) {
1763 DEBUG(10, ("Found stale batch oplock\n"));
1766 if (ex_or_batch || batch || level2 || no_oplock) {
1767 DEBUG(0, ("Bad batch oplock entry %u.",
1774 if (EXCLUSIVE_OPLOCK_TYPE(e->op_type)) {
1775 if (share_mode_stale_pid(d, i)) {
1776 DEBUG(10, ("Found stale duplicate oplock\n"));
1779 /* Exclusive or batch - can only be one. */
1780 if (ex_or_batch || level2 || no_oplock) {
1781 DEBUG(0, ("Bad exclusive or batch oplock "
1782 "entry %u.", (unsigned)i));
1788 if (LEVEL_II_OPLOCK_TYPE(e->op_type)) {
1789 if (batch || ex_or_batch) {
1790 if (share_mode_stale_pid(d, i)) {
1791 DEBUG(10, ("Found stale LevelII "
1795 DEBUG(0, ("Bad levelII oplock entry %u.",
1802 if (e->op_type == NO_OPLOCK) {
1803 if (batch || ex_or_batch) {
1804 if (share_mode_stale_pid(d, i)) {
1805 DEBUG(10, ("Found stale NO_OPLOCK "
1809 DEBUG(0, ("Bad no oplock entry %u.",
1817 remove_stale_share_mode_entries(d);
1819 if ((batch || ex_or_batch) && (num_non_stat_opens != 1)) {
1820 DEBUG(1, ("got batch (%d) or ex (%d) non-exclusively (%d)\n",
1821 (int)batch, (int)ex_or_batch,
1822 (int)d->num_share_modes));
1829 static bool delay_for_oplock(files_struct *fsp,
1831 const struct smb2_lease *lease,
1832 struct share_mode_lock *lck,
1833 bool have_sharing_violation,
1834 uint32_t create_disposition,
1835 bool first_open_attempt)
1837 struct share_mode_data *d = lck->data;
1840 bool will_overwrite;
1842 if ((oplock_request & INTERNAL_OPEN_ONLY) ||
1843 is_stat_open(fsp->access_mask)) {
1847 switch (create_disposition) {
1848 case FILE_SUPERSEDE:
1849 case FILE_OVERWRITE:
1850 case FILE_OVERWRITE_IF:
1851 will_overwrite = true;
1854 will_overwrite = false;
1858 for (i=0; i<d->num_share_modes; i++) {
1859 struct share_mode_entry *e = &d->share_modes[i];
1860 struct share_mode_lease *l = NULL;
1861 uint32_t e_lease_type = get_lease_type(d, e);
1863 uint32_t delay_mask = 0;
1865 if (e->op_type == LEASE_OPLOCK) {
1866 l = &d->leases[e->lease_idx];
1869 if (have_sharing_violation) {
1870 delay_mask = SMB2_LEASE_HANDLE;
1872 delay_mask = SMB2_LEASE_WRITE;
1875 break_to = e_lease_type & ~delay_mask;
1877 if (will_overwrite) {
1879 * we'll decide about SMB2_LEASE_READ later.
1881 * Maybe the break will be deferred
1883 break_to &= ~SMB2_LEASE_HANDLE;
1886 DEBUG(10, ("entry %u: e_lease_type %u, will_overwrite: %u\n",
1887 (unsigned)i, (unsigned)e_lease_type,
1888 (unsigned)will_overwrite));
1890 if (lease != NULL && l != NULL) {
1893 ign = smb2_lease_equal(fsp_client_guid(fsp),
1902 if ((e_lease_type & ~break_to) == 0) {
1903 if (l != NULL && l->breaking) {
1909 if (share_mode_stale_pid(d, i)) {
1913 if (will_overwrite) {
1915 * If we break anyway break to NONE directly.
1916 * Otherwise vfs_set_filelen() will trigger the
1919 break_to &= ~(SMB2_LEASE_READ|SMB2_LEASE_WRITE);
1922 if (e->op_type != LEASE_OPLOCK) {
1924 * Oplocks only support breaking to R or NONE.
1926 break_to &= ~(SMB2_LEASE_HANDLE|SMB2_LEASE_WRITE);
1929 DEBUG(10, ("breaking from %d to %d\n",
1930 (int)e_lease_type, (int)break_to));
1931 send_break_message(fsp->conn->sconn->msg_ctx, &fsp->file_id,
1933 if (e_lease_type & delay_mask) {
1936 if (l != NULL && l->breaking && !first_open_attempt) {
1945 static bool file_has_brlocks(files_struct *fsp)
1947 struct byte_range_lock *br_lck;
1949 br_lck = brl_get_locks_readonly(fsp);
1953 return (brl_num_locks(br_lck) > 0);
1956 int find_share_mode_lease(struct share_mode_data *d,
1957 const struct GUID *client_guid,
1958 const struct smb2_lease_key *key)
1962 for (i=0; i<d->num_leases; i++) {
1963 struct share_mode_lease *l = &d->leases[i];
1965 if (smb2_lease_equal(client_guid,
1976 struct fsp_lease *find_fsp_lease(struct files_struct *new_fsp,
1977 const struct smb2_lease_key *key,
1978 const struct share_mode_lease *l)
1980 struct files_struct *fsp;
1983 * TODO: Measure how expensive this loop is with thousands of open
1987 for (fsp = file_find_di_first(new_fsp->conn->sconn, new_fsp->file_id);
1989 fsp = file_find_di_next(fsp)) {
1991 if (fsp == new_fsp) {
1994 if (fsp->oplock_type != LEASE_OPLOCK) {
1997 if (smb2_lease_key_equal(&fsp->lease->lease.lease_key, key)) {
1998 fsp->lease->ref_count += 1;
2003 /* Not found - must be leased in another smbd. */
2004 new_fsp->lease = talloc_zero(new_fsp->conn->sconn, struct fsp_lease);
2005 if (new_fsp->lease == NULL) {
2008 new_fsp->lease->ref_count = 1;
2009 new_fsp->lease->sconn = new_fsp->conn->sconn;
2010 new_fsp->lease->lease.lease_key = *key;
2011 new_fsp->lease->lease.lease_state = l->current_state;
2013 * We internally treat all leases as V2 and update
2014 * the epoch, but when sending breaks it matters if
2015 * the requesting lease was v1 or v2.
2017 new_fsp->lease->lease.lease_version = l->lease_version;
2018 new_fsp->lease->lease.lease_epoch = l->epoch;
2019 return new_fsp->lease;
2022 static NTSTATUS grant_fsp_lease(struct files_struct *fsp,
2023 struct share_mode_lock *lck,
2024 const struct smb2_lease *lease,
2025 uint32_t *p_lease_idx,
2028 struct share_mode_data *d = lck->data;
2029 const struct GUID *client_guid = fsp_client_guid(fsp);
2030 struct share_mode_lease *tmp;
2034 idx = find_share_mode_lease(d, client_guid, &lease->lease_key);
2037 struct share_mode_lease *l = &d->leases[idx];
2039 uint32_t existing, requested;
2041 fsp->lease = find_fsp_lease(fsp, &lease->lease_key, l);
2042 if (fsp->lease == NULL) {
2043 DEBUG(1, ("Did not find existing lease for file %s\n",
2045 return NT_STATUS_NO_MEMORY;
2051 * Upgrade only if the requested lease is a strict upgrade.
2053 existing = l->current_state;
2054 requested = lease->lease_state;
2057 * Tricky: This test makes sure that "requested" is a
2058 * strict bitwise superset of "existing".
2060 do_upgrade = ((existing & requested) == existing);
2063 * Upgrade only if there's a change.
2065 do_upgrade &= (granted != existing);
2068 * Upgrade only if other leases don't prevent what was asked
2071 do_upgrade &= (granted == requested);
2074 * only upgrade if we are not in breaking state
2076 do_upgrade &= !l->breaking;
2078 DEBUG(10, ("existing=%"PRIu32", requested=%"PRIu32", "
2079 "granted=%"PRIu32", do_upgrade=%d\n",
2080 existing, requested, granted, (int)do_upgrade));
2083 l->current_state = granted;
2087 /* Ensure we're in sync with current lease state. */
2088 fsp_lease_update(lck, fsp_client_guid(fsp), fsp->lease);
2089 return NT_STATUS_OK;
2096 tmp = talloc_realloc(d, d->leases, struct share_mode_lease,
2102 return NT_STATUS_INSUFFICIENT_RESOURCES;
2106 fsp->lease = talloc_zero(fsp->conn->sconn, struct fsp_lease);
2107 if (fsp->lease == NULL) {
2108 return NT_STATUS_INSUFFICIENT_RESOURCES;
2110 fsp->lease->ref_count = 1;
2111 fsp->lease->sconn = fsp->conn->sconn;
2112 fsp->lease->lease.lease_version = lease->lease_version;
2113 fsp->lease->lease.lease_key = lease->lease_key;
2114 fsp->lease->lease.lease_state = granted;
2115 fsp->lease->lease.lease_epoch = lease->lease_epoch + 1;
2117 *p_lease_idx = d->num_leases;
2119 d->leases[d->num_leases] = (struct share_mode_lease) {
2120 .client_guid = *client_guid,
2121 .lease_key = fsp->lease->lease.lease_key,
2122 .current_state = fsp->lease->lease.lease_state,
2123 .lease_version = fsp->lease->lease.lease_version,
2124 .epoch = fsp->lease->lease.lease_epoch,
2127 status = leases_db_add(client_guid,
2130 fsp->conn->connectpath,
2131 fsp->fsp_name->base_name,
2132 fsp->fsp_name->stream_name);
2133 if (!NT_STATUS_IS_OK(status)) {
2134 DEBUG(10, ("%s: leases_db_add failed: %s\n", __func__,
2135 nt_errstr(status)));
2136 TALLOC_FREE(fsp->lease);
2137 return NT_STATUS_INSUFFICIENT_RESOURCES;
2143 return NT_STATUS_OK;
2146 static bool is_same_lease(const files_struct *fsp,
2147 const struct share_mode_data *d,
2148 const struct share_mode_entry *e,
2149 const struct smb2_lease *lease)
2151 if (e->op_type != LEASE_OPLOCK) {
2154 if (lease == NULL) {
2158 return smb2_lease_equal(fsp_client_guid(fsp),
2160 &d->leases[e->lease_idx].client_guid,
2161 &d->leases[e->lease_idx].lease_key);
2164 static NTSTATUS grant_fsp_oplock_type(struct smb_request *req,
2165 struct files_struct *fsp,
2166 struct share_mode_lock *lck,
2168 struct smb2_lease *lease)
2170 struct share_mode_data *d = lck->data;
2171 bool got_handle_lease = false;
2172 bool got_oplock = false;
2175 uint32_t lease_idx = UINT32_MAX;
2179 if (oplock_request & INTERNAL_OPEN_ONLY) {
2180 /* No oplocks on internal open. */
2181 oplock_request = NO_OPLOCK;
2182 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
2183 fsp->oplock_type, fsp_str_dbg(fsp)));
2186 if (oplock_request == LEASE_OPLOCK) {
2187 if (lease == NULL) {
2189 * The SMB2 layer should have checked this
2191 return NT_STATUS_INTERNAL_ERROR;
2194 granted = lease->lease_state;
2196 if (lp_kernel_oplocks(SNUM(fsp->conn))) {
2197 DEBUG(10, ("No lease granted because kernel oplocks are enabled\n"));
2198 granted = SMB2_LEASE_NONE;
2200 if ((granted & (SMB2_LEASE_READ|SMB2_LEASE_WRITE)) == 0) {
2201 DEBUG(10, ("No read or write lease requested\n"));
2202 granted = SMB2_LEASE_NONE;
2204 if (granted == SMB2_LEASE_WRITE) {
2205 DEBUG(10, ("pure write lease requested\n"));
2206 granted = SMB2_LEASE_NONE;
2208 if (granted == (SMB2_LEASE_WRITE|SMB2_LEASE_HANDLE)) {
2209 DEBUG(10, ("write and handle lease requested\n"));
2210 granted = SMB2_LEASE_NONE;
2213 granted = map_oplock_to_lease_type(
2214 oplock_request & ~SAMBA_PRIVATE_OPLOCK_MASK);
2217 if (lp_locking(fsp->conn->params) && file_has_brlocks(fsp)) {
2218 DEBUG(10,("grant_fsp_oplock_type: file %s has byte range locks\n",
2220 granted &= ~SMB2_LEASE_READ;
2223 for (i=0; i<d->num_share_modes; i++) {
2224 struct share_mode_entry *e = &d->share_modes[i];
2225 uint32_t e_lease_type;
2227 e_lease_type = get_lease_type(d, e);
2229 if ((granted & SMB2_LEASE_WRITE) &&
2230 !is_same_lease(fsp, d, e, lease) &&
2231 !share_mode_stale_pid(d, i)) {
2233 * Can grant only one writer
2235 granted &= ~SMB2_LEASE_WRITE;
2238 if ((e_lease_type & SMB2_LEASE_HANDLE) && !got_handle_lease &&
2239 !share_mode_stale_pid(d, i)) {
2240 got_handle_lease = true;
2243 if ((e->op_type != LEASE_OPLOCK) && !got_oplock &&
2244 !share_mode_stale_pid(d, i)) {
2249 if ((granted & SMB2_LEASE_READ) && !(granted & SMB2_LEASE_WRITE)) {
2251 (global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
2252 lp_level2_oplocks(SNUM(fsp->conn));
2254 if (!allow_level2) {
2255 granted = SMB2_LEASE_NONE;
2259 if (oplock_request == LEASE_OPLOCK) {
2261 granted &= ~SMB2_LEASE_HANDLE;
2264 fsp->oplock_type = LEASE_OPLOCK;
2266 status = grant_fsp_lease(fsp, lck, lease, &lease_idx,
2268 if (!NT_STATUS_IS_OK(status)) {
2272 *lease = fsp->lease->lease;
2273 DEBUG(10, ("lease_state=%d\n", lease->lease_state));
2275 if (got_handle_lease) {
2276 granted = SMB2_LEASE_NONE;
2280 case SMB2_LEASE_READ|SMB2_LEASE_WRITE|SMB2_LEASE_HANDLE:
2281 fsp->oplock_type = BATCH_OPLOCK|EXCLUSIVE_OPLOCK;
2283 case SMB2_LEASE_READ|SMB2_LEASE_WRITE:
2284 fsp->oplock_type = EXCLUSIVE_OPLOCK;
2286 case SMB2_LEASE_READ|SMB2_LEASE_HANDLE:
2287 case SMB2_LEASE_READ:
2288 fsp->oplock_type = LEVEL_II_OPLOCK;
2291 fsp->oplock_type = NO_OPLOCK;
2295 status = set_file_oplock(fsp);
2296 if (!NT_STATUS_IS_OK(status)) {
2298 * Could not get the kernel oplock
2300 fsp->oplock_type = NO_OPLOCK;
2304 ok = set_share_mode(lck, fsp, get_current_uid(fsp->conn),
2309 return NT_STATUS_NO_MEMORY;
2312 ok = update_num_read_oplocks(fsp, lck);
2314 del_share_mode(lck, fsp);
2315 return NT_STATUS_INTERNAL_ERROR;
2318 DEBUG(10,("grant_fsp_oplock_type: oplock type 0x%x on file %s\n",
2319 fsp->oplock_type, fsp_str_dbg(fsp)));
2321 return NT_STATUS_OK;
2324 static bool request_timed_out(struct timeval request_time,
2325 struct timeval timeout)
2327 struct timeval now, end_time;
2329 end_time = timeval_sum(&request_time, &timeout);
2330 return (timeval_compare(&end_time, &now) < 0);
2333 static struct deferred_open_record *deferred_open_record_create(
2334 bool delayed_for_oplocks,
2338 struct deferred_open_record *record = NULL;
2340 record = talloc(NULL, struct deferred_open_record);
2341 if (record == NULL) {
2345 *record = (struct deferred_open_record) {
2346 .delayed_for_oplocks = delayed_for_oplocks,
2347 .async_open = async_open,
2354 struct defer_open_state {
2355 struct smbXsrv_connection *xconn;
2359 static void defer_open_done(struct tevent_req *req);
2362 * Defer an open and watch a locking.tdb record
2364 * This defers an open that gets rescheduled once the locking.tdb record watch
2365 * is triggered by a change to the record.
2367 * It is used to defer opens that triggered an oplock break and for the SMB1
2368 * sharing violation delay.
2370 static void defer_open(struct share_mode_lock *lck,
2371 struct timeval request_time,
2372 struct timeval timeout,
2373 struct smb_request *req,
2374 bool delayed_for_oplocks,
2377 struct deferred_open_record *open_rec = NULL;
2378 struct timeval abs_timeout;
2379 struct defer_open_state *watch_state;
2380 struct tevent_req *watch_req;
2383 abs_timeout = timeval_sum(&request_time, &timeout);
2385 DBG_DEBUG("request time [%s] timeout [%s] mid [%" PRIu64 "] "
2386 "delayed_for_oplocks [%s] file_id [%s]\n",
2387 timeval_string(talloc_tos(), &request_time, false),
2388 timeval_string(talloc_tos(), &abs_timeout, false),
2390 delayed_for_oplocks ? "yes" : "no",
2391 file_id_string_tos(&id));
2393 open_rec = deferred_open_record_create(delayed_for_oplocks,
2396 if (open_rec == NULL) {
2398 exit_server("talloc failed");
2401 watch_state = talloc(open_rec, struct defer_open_state);
2402 if (watch_state == NULL) {
2403 exit_server("talloc failed");
2405 watch_state->xconn = req->xconn;
2406 watch_state->mid = req->mid;
2408 DBG_DEBUG("defering mid %" PRIu64 "\n", req->mid);
2410 watch_req = dbwrap_watched_watch_send(watch_state,
2413 (struct server_id){0});
2414 if (watch_req == NULL) {
2415 exit_server("Could not watch share mode record");
2417 tevent_req_set_callback(watch_req, defer_open_done, watch_state);
2419 ok = tevent_req_set_endtime(watch_req, req->sconn->ev_ctx, abs_timeout);
2421 exit_server("tevent_req_set_endtime failed");
2424 ok = push_deferred_open_message_smb(req, request_time, timeout,
2425 open_rec->id, open_rec);
2428 exit_server("push_deferred_open_message_smb failed");
2432 static void defer_open_done(struct tevent_req *req)
2434 struct defer_open_state *state = tevent_req_callback_data(
2435 req, struct defer_open_state);
2439 status = dbwrap_watched_watch_recv(req, NULL, NULL);
2441 if (!NT_STATUS_IS_OK(status)) {
2442 DEBUG(5, ("dbwrap_watched_watch_recv returned %s\n",
2443 nt_errstr(status)));
2445 * Even if it failed, retry anyway. TODO: We need a way to
2446 * tell a re-scheduled open about that error.
2450 DEBUG(10, ("scheduling mid %llu\n", (unsigned long long)state->mid));
2452 ret = schedule_deferred_open_message_smb(state->xconn, state->mid);
2458 * Actually attempt the kernel oplock polling open.
2461 static void kernel_oplock_poll_open_timer(struct tevent_context *ev,
2462 struct tevent_timer *te,
2463 struct timeval current_time,
2467 struct smb_request *req = (struct smb_request *)private_data;
2469 ok = schedule_deferred_open_message_smb(req->xconn, req->mid);
2471 exit_server("schedule_deferred_open_message_smb failed");
2473 DBG_DEBUG("kernel_oplock_poll_open_timer fired. Retying open !\n");
2477 * Reschedule an open for 1 second from now, if not timed out.
2479 static void setup_kernel_oplock_poll_open(struct timeval request_time,
2480 struct smb_request *req,
2485 struct deferred_open_record *open_rec = NULL;
2486 /* Maximum wait time. */
2487 struct timeval timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
2489 if (request_timed_out(request_time, timeout)) {
2493 open_rec = deferred_open_record_create(false, false, id);
2494 if (open_rec == NULL) {
2495 exit_server("talloc failed");
2498 ok = push_deferred_open_message_smb(req,
2504 exit_server("push_deferred_open_message_smb failed");
2508 * As this timer event is owned by req, it will
2509 * disappear if req it talloc_freed.
2511 open_rec->te = tevent_add_timer(req->sconn->ev_ctx,
2513 timeval_current_ofs(1, 0),
2514 kernel_oplock_poll_open_timer,
2516 if (open_rec->te == NULL) {
2517 exit_server("tevent_add_timer failed");
2520 DBG_DEBUG("poll request time [%s] mid [%" PRIu64 "] file_id [%s]\n",
2521 timeval_string(talloc_tos(), &request_time, false),
2523 file_id_string_tos(&id));
2526 /****************************************************************************
2527 On overwrite open ensure that the attributes match.
2528 ****************************************************************************/
2530 static bool open_match_attributes(connection_struct *conn,
2531 uint32_t old_dos_attr,
2532 uint32_t new_dos_attr,
2533 mode_t new_unx_mode,
2534 mode_t *returned_unx_mode)
2536 uint32_t noarch_old_dos_attr, noarch_new_dos_attr;
2538 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
2539 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
2541 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
2542 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
2543 *returned_unx_mode = new_unx_mode;
2545 *returned_unx_mode = (mode_t)0;
2548 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
2549 "new_dos_attr = 0x%x "
2550 "returned_unx_mode = 0%o\n",
2551 (unsigned int)old_dos_attr,
2552 (unsigned int)new_dos_attr,
2553 (unsigned int)*returned_unx_mode ));
2555 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
2556 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
2557 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
2558 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
2562 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
2563 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
2564 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
2571 /****************************************************************************
2572 Special FCB or DOS processing in the case of a sharing violation.
2573 Try and find a duplicated file handle.
2574 ****************************************************************************/
2576 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
2577 connection_struct *conn,
2578 files_struct *fsp_to_dup_into,
2579 const struct smb_filename *smb_fname,
2583 uint32_t access_mask,
2584 uint32_t share_access,
2585 uint32_t create_options)
2589 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
2590 "file %s.\n", smb_fname_str_dbg(smb_fname)));
2592 for(fsp = file_find_di_first(conn->sconn, id); fsp;
2593 fsp = file_find_di_next(fsp)) {
2595 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
2596 "vuid = %llu, file_pid = %u, private_options = 0x%x "
2597 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
2598 fsp->fh->fd, (unsigned long long)fsp->vuid,
2599 (unsigned int)fsp->file_pid,
2600 (unsigned int)fsp->fh->private_options,
2601 (unsigned int)fsp->access_mask ));
2603 if (fsp != fsp_to_dup_into &&
2604 fsp->fh->fd != -1 &&
2605 fsp->vuid == vuid &&
2606 fsp->file_pid == file_pid &&
2607 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
2608 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
2609 (fsp->access_mask & FILE_WRITE_DATA) &&
2610 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
2611 strequal(fsp->fsp_name->stream_name,
2612 smb_fname->stream_name)) {
2613 DEBUG(10,("fcb_or_dos_open: file match\n"));
2619 return NT_STATUS_NOT_FOUND;
2622 /* quite an insane set of semantics ... */
2623 if (is_executable(smb_fname->base_name) &&
2624 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
2625 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
2626 return NT_STATUS_INVALID_PARAMETER;
2629 /* We need to duplicate this fsp. */
2630 return dup_file_fsp(req, fsp, access_mask, share_access,
2631 create_options, fsp_to_dup_into);
2634 static void schedule_defer_open(struct share_mode_lock *lck,
2636 struct timeval request_time,
2637 struct smb_request *req)
2639 /* This is a relative time, added to the absolute
2640 request_time value to get the absolute timeout time.
2641 Note that if this is the second or greater time we enter
2642 this codepath for this particular request mid then
2643 request_time is left as the absolute time of the *first*
2644 time this request mid was processed. This is what allows
2645 the request to eventually time out. */
2647 struct timeval timeout;
2649 /* Normally the smbd we asked should respond within
2650 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
2651 * the client did, give twice the timeout as a safety
2652 * measure here in case the other smbd is stuck
2653 * somewhere else. */
2655 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
2657 if (request_timed_out(request_time, timeout)) {
2661 defer_open(lck, request_time, timeout, req, true, id);
2664 /****************************************************************************
2665 Reschedule an open call that went asynchronous.
2666 ****************************************************************************/
2668 static void schedule_async_open_timer(struct tevent_context *ev,
2669 struct tevent_timer *te,
2670 struct timeval current_time,
2673 exit_server("async open timeout");
2676 static void schedule_async_open(struct timeval request_time,
2677 struct smb_request *req)
2679 struct deferred_open_record *open_rec = NULL;
2680 struct timeval timeout = timeval_set(20, 0);
2683 if (request_timed_out(request_time, timeout)) {
2687 open_rec = deferred_open_record_create(false, true, (struct file_id){0});
2688 if (open_rec == NULL) {
2689 exit_server("deferred_open_record_create failed");
2692 ok = push_deferred_open_message_smb(req, request_time, timeout,
2693 (struct file_id){0}, open_rec);
2695 exit_server("push_deferred_open_message_smb failed");
2698 open_rec->te = tevent_add_timer(req->sconn->ev_ctx,
2700 timeval_current_ofs(20, 0),
2701 schedule_async_open_timer,
2703 if (open_rec->te == NULL) {
2704 exit_server("tevent_add_timer failed");
2708 /****************************************************************************
2709 Work out what access_mask to use from what the client sent us.
2710 ****************************************************************************/
2712 static NTSTATUS smbd_calculate_maximum_allowed_access(
2713 connection_struct *conn,
2714 const struct smb_filename *smb_fname,
2716 uint32_t *p_access_mask)
2718 struct security_descriptor *sd;
2719 uint32_t access_granted;
2722 if (!use_privs && (get_current_uid(conn) == (uid_t)0)) {
2723 *p_access_mask |= FILE_GENERIC_ALL;
2724 return NT_STATUS_OK;
2727 status = SMB_VFS_GET_NT_ACL(conn, smb_fname,
2733 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2735 * File did not exist
2737 *p_access_mask = FILE_GENERIC_ALL;
2738 return NT_STATUS_OK;
2740 if (!NT_STATUS_IS_OK(status)) {
2741 DEBUG(10,("Could not get acl on file %s: %s\n",
2742 smb_fname_str_dbg(smb_fname),
2743 nt_errstr(status)));
2744 return NT_STATUS_ACCESS_DENIED;
2748 * If we can access the path to this file, by
2749 * default we have FILE_READ_ATTRIBUTES from the
2750 * containing directory. See the section:
2751 * "Algorithm to Check Access to an Existing File"
2754 * se_file_access_check()
2755 * also takes care of owner WRITE_DAC and READ_CONTROL.
2757 status = se_file_access_check(sd,
2758 get_current_nttok(conn),
2760 (*p_access_mask & ~FILE_READ_ATTRIBUTES),
2765 if (!NT_STATUS_IS_OK(status)) {
2766 DEBUG(10, ("Access denied on file %s: "
2767 "when calculating maximum access\n",
2768 smb_fname_str_dbg(smb_fname)));
2769 return NT_STATUS_ACCESS_DENIED;
2771 *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
2773 if (!(access_granted & DELETE_ACCESS)) {
2774 if (can_delete_file_in_directory(conn, smb_fname)) {
2775 *p_access_mask |= DELETE_ACCESS;
2779 return NT_STATUS_OK;
2782 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
2783 const struct smb_filename *smb_fname,
2785 uint32_t access_mask,
2786 uint32_t *access_mask_out)
2789 uint32_t orig_access_mask = access_mask;
2790 uint32_t rejected_share_access;
2792 if (access_mask & SEC_MASK_INVALID) {
2793 DBG_DEBUG("access_mask [%8x] contains invalid bits\n",
2795 return NT_STATUS_ACCESS_DENIED;
2799 * Convert GENERIC bits to specific bits.
2802 se_map_generic(&access_mask, &file_generic_mapping);
2804 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
2805 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
2807 status = smbd_calculate_maximum_allowed_access(
2808 conn, smb_fname, use_privs, &access_mask);
2810 if (!NT_STATUS_IS_OK(status)) {
2814 access_mask &= conn->share_access;
2817 rejected_share_access = access_mask & ~(conn->share_access);
2819 if (rejected_share_access) {
2820 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
2821 "file %s: rejected by share access mask[0x%08X] "
2822 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
2823 smb_fname_str_dbg(smb_fname),
2825 orig_access_mask, access_mask,
2826 rejected_share_access));
2827 return NT_STATUS_ACCESS_DENIED;
2830 *access_mask_out = access_mask;
2831 return NT_STATUS_OK;
2834 /****************************************************************************
2835 Remove the deferred open entry under lock.
2836 ****************************************************************************/
2838 /****************************************************************************
2839 Return true if this is a state pointer to an asynchronous create.
2840 ****************************************************************************/
2842 bool is_deferred_open_async(const struct deferred_open_record *rec)
2844 return rec->async_open;
2847 static bool clear_ads(uint32_t create_disposition)
2851 switch (create_disposition) {
2852 case FILE_SUPERSEDE:
2853 case FILE_OVERWRITE_IF:
2854 case FILE_OVERWRITE:
2863 static int disposition_to_open_flags(uint32_t create_disposition)
2868 * Currently we're using FILE_SUPERSEDE as the same as
2869 * FILE_OVERWRITE_IF but they really are
2870 * different. FILE_SUPERSEDE deletes an existing file
2871 * (requiring delete access) then recreates it.
2874 switch (create_disposition) {
2875 case FILE_SUPERSEDE:
2876 case FILE_OVERWRITE_IF:
2878 * If file exists replace/overwrite. If file doesn't
2881 ret = O_CREAT|O_TRUNC;
2886 * If file exists open. If file doesn't exist error.
2891 case FILE_OVERWRITE:
2893 * If file exists overwrite. If file doesn't exist
2901 * If file exists error. If file doesn't exist create.
2903 ret = O_CREAT|O_EXCL;
2908 * If file exists open. If file doesn't exist create.
2916 static int calculate_open_access_flags(uint32_t access_mask,
2917 uint32_t private_flags)
2919 bool need_write, need_read;
2922 * Note that we ignore the append flag as append does not
2923 * mean the same thing under DOS and Unix.
2926 need_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA));
2931 /* DENY_DOS opens are always underlying read-write on the
2932 file handle, no matter what the requested access mask
2936 ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
2937 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|
2938 FILE_READ_EA|FILE_EXECUTE));
2946 /****************************************************************************
2947 Open a file with a share mode. Passed in an already created files_struct *.
2948 ****************************************************************************/
2950 static NTSTATUS open_file_ntcreate(connection_struct *conn,
2951 struct smb_request *req,
2952 uint32_t access_mask, /* access bits (FILE_READ_DATA etc.) */
2953 uint32_t share_access, /* share constants (FILE_SHARE_READ etc) */
2954 uint32_t create_disposition, /* FILE_OPEN_IF etc. */
2955 uint32_t create_options, /* options such as delete on close. */
2956 uint32_t new_dos_attributes, /* attributes used for new file. */
2957 int oplock_request, /* internal Samba oplock codes. */
2958 struct smb2_lease *lease,
2959 /* Information (FILE_EXISTS etc.) */
2960 uint32_t private_flags, /* Samba specific flags. */
2964 struct smb_filename *smb_fname = fsp->fsp_name;
2967 bool file_existed = VALID_STAT(smb_fname->st);
2968 bool def_acl = False;
2969 bool posix_open = False;
2970 bool new_file_created = False;
2971 bool first_open_attempt = true;
2972 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
2973 mode_t new_unx_mode = (mode_t)0;
2974 mode_t unx_mode = (mode_t)0;
2976 uint32_t existing_dos_attributes = 0;
2977 struct timeval request_time = timeval_zero();
2978 struct share_mode_lock *lck = NULL;
2979 uint32_t open_access_mask = access_mask;
2982 SMB_STRUCT_STAT saved_stat = smb_fname->st;
2983 struct timespec old_write_time;
2986 if (conn->printer) {
2988 * Printers are handled completely differently.
2989 * Most of the passed parameters are ignored.
2993 *pinfo = FILE_WAS_CREATED;
2996 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
2997 smb_fname_str_dbg(smb_fname)));
3000 DEBUG(0,("open_file_ntcreate: printer open without "
3001 "an SMB request!\n"));
3002 return NT_STATUS_INTERNAL_ERROR;
3005 return print_spool_open(fsp, smb_fname->base_name,
3009 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
3011 return NT_STATUS_NO_MEMORY;
3014 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3016 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
3017 new_dos_attributes = 0;
3019 /* Windows allows a new file to be created and
3020 silently removes a FILE_ATTRIBUTE_DIRECTORY
3021 sent by the client. Do the same. */
3023 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
3025 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
3027 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
3028 smb_fname, parent_dir);
3031 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
3032 "access_mask=0x%x share_access=0x%x "
3033 "create_disposition = 0x%x create_options=0x%x "
3034 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
3035 smb_fname_str_dbg(smb_fname), new_dos_attributes,
3036 access_mask, share_access, create_disposition,
3037 create_options, (unsigned int)unx_mode, oplock_request,
3038 (unsigned int)private_flags));
3041 /* Ensure req == NULL means INTERNAL_OPEN_ONLY */
3042 SMB_ASSERT(((oplock_request & INTERNAL_OPEN_ONLY) != 0));
3044 /* And req != NULL means no INTERNAL_OPEN_ONLY */
3045 SMB_ASSERT(((oplock_request & INTERNAL_OPEN_ONLY) == 0));
3049 * Only non-internal opens can be deferred at all
3053 struct deferred_open_record *open_rec;
3054 if (get_deferred_open_message_state(req,
3057 /* Remember the absolute time of the original
3058 request with this mid. We'll use it later to
3059 see if this has timed out. */
3061 /* If it was an async create retry, the file
3064 if (is_deferred_open_async(open_rec)) {
3065 SET_STAT_INVALID(smb_fname->st);
3066 file_existed = false;
3069 /* Ensure we don't reprocess this message. */
3070 remove_deferred_open_message_smb(req->xconn, req->mid);
3072 first_open_attempt = false;
3077 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
3080 * Only use strored DOS attributes for checks
3081 * against requested attributes (below via
3082 * open_match_attributes()), cf bug #11992
3083 * for details. -slow
3087 status = SMB_VFS_GET_DOS_ATTRIBUTES(conn, smb_fname, &attr);
3088 if (NT_STATUS_IS_OK(status)) {
3089 existing_dos_attributes = attr;
3094 /* ignore any oplock requests if oplocks are disabled */
3095 if (!lp_oplocks(SNUM(conn)) ||
3096 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
3097 /* Mask off everything except the private Samba bits. */
3098 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
3101 /* this is for OS/2 long file names - say we don't support them */
3102 if (req != NULL && !req->posix_pathnames &&
3103 strstr(smb_fname->base_name,".+,;=[].")) {
3104 /* OS/2 Workplace shell fix may be main code stream in a later
3106 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
3108 if (use_nt_status()) {
3109 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
3111 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
3114 switch( create_disposition ) {
3116 /* If file exists open. If file doesn't exist error. */
3117 if (!file_existed) {
3118 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
3119 "requested for file %s and file "
3121 smb_fname_str_dbg(smb_fname)));
3123 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
3127 case FILE_OVERWRITE:
3128 /* If file exists overwrite. If file doesn't exist
3130 if (!file_existed) {
3131 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
3132 "requested for file %s and file "
3134 smb_fname_str_dbg(smb_fname) ));
3136 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
3141 /* If file exists error. If file doesn't exist
3144 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
3145 "requested for file %s and file "
3146 "already exists.\n",
3147 smb_fname_str_dbg(smb_fname)));
3148 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
3153 return map_nt_error_from_unix(errno);
3157 case FILE_SUPERSEDE:
3158 case FILE_OVERWRITE_IF:
3162 return NT_STATUS_INVALID_PARAMETER;
3165 flags2 = disposition_to_open_flags(create_disposition);
3167 /* We only care about matching attributes on file exists and
3170 if (!posix_open && file_existed &&
3171 ((create_disposition == FILE_OVERWRITE) ||
3172 (create_disposition == FILE_OVERWRITE_IF))) {
3173 if (!open_match_attributes(conn, existing_dos_attributes,
3175 unx_mode, &new_unx_mode)) {
3176 DEBUG(5,("open_file_ntcreate: attributes mismatch "
3177 "for file %s (%x %x) (0%o, 0%o)\n",
3178 smb_fname_str_dbg(smb_fname),
3179 existing_dos_attributes,
3181 (unsigned int)smb_fname->st.st_ex_mode,
3182 (unsigned int)unx_mode ));
3184 return NT_STATUS_ACCESS_DENIED;
3188 status = smbd_calculate_access_mask(conn, smb_fname,
3192 if (!NT_STATUS_IS_OK(status)) {
3193 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
3194 "on file %s returned %s\n",
3195 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
3199 open_access_mask = access_mask;
3201 if (flags2 & O_TRUNC) {
3202 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
3205 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
3206 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
3210 * Note that we ignore the append flag as append does not
3211 * mean the same thing under DOS and Unix.
3214 flags = calculate_open_access_flags(access_mask, private_flags);
3217 * Currently we only look at FILE_WRITE_THROUGH for create options.
3221 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
3226 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
3230 if (!posix_open && !CAN_WRITE(conn)) {
3232 * We should really return a permission denied error if either
3233 * O_CREAT or O_TRUNC are set, but for compatibility with
3234 * older versions of Samba we just AND them out.
3236 flags2 &= ~(O_CREAT|O_TRUNC);
3239 if (lp_kernel_oplocks(SNUM(conn))) {
3241 * With kernel oplocks the open breaking an oplock
3242 * blocks until the oplock holder has given up the
3243 * oplock or closed the file. We prevent this by always
3244 * trying to open the file with O_NONBLOCK (see "man
3247 * If a process that doesn't use the smbd open files
3248 * database or communication methods holds a kernel
3249 * oplock we must periodically poll for available open
3252 flags2 |= O_NONBLOCK;
3256 * Ensure we can't write on a read-only share or file.
3259 if (flags != O_RDONLY && file_existed &&
3260 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
3261 DEBUG(5,("open_file_ntcreate: write access requested for "
3262 "file %s on read only %s\n",
3263 smb_fname_str_dbg(smb_fname),
3264 !CAN_WRITE(conn) ? "share" : "file" ));
3266 return NT_STATUS_ACCESS_DENIED;
3269 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
3270 fsp->share_access = share_access;
3271 fsp->fh->private_options = private_flags;
3272 fsp->access_mask = open_access_mask; /* We change this to the
3273 * requested access_mask after
3274 * the open is done. */
3276 fsp->posix_flags |= FSP_POSIX_FLAGS_ALL;
3279 if (timeval_is_zero(&request_time)) {
3280 request_time = fsp->open_time;
3283 if ((create_options & FILE_DELETE_ON_CLOSE) &&
3284 (flags2 & O_CREAT) &&
3286 /* Delete on close semantics for new files. */
3287 status = can_set_delete_on_close(fsp,
3288 new_dos_attributes);
3289 if (!NT_STATUS_IS_OK(status)) {
3296 * Ensure we pay attention to default ACLs on directories if required.
3299 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
3300 (def_acl = directory_has_default_acl(conn, parent_dir))) {
3301 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
3304 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
3305 "access_mask = 0x%x, open_access_mask = 0x%x\n",
3306 (unsigned int)flags, (unsigned int)flags2,
3307 (unsigned int)unx_mode, (unsigned int)access_mask,
3308 (unsigned int)open_access_mask));
3310 fsp_open = open_file(fsp, conn, req, parent_dir,
3311 flags|flags2, unx_mode, access_mask,
3312 open_access_mask, &new_file_created);
3314 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_NETWORK_BUSY)) {
3318 * This handles the kernel oplock case:
3320 * the file has an active kernel oplock and the open() returned
3321 * EWOULDBLOCK/EAGAIN which maps to NETWORK_BUSY.
3323 * "Samba locking.tdb oplocks" are handled below after acquiring
3324 * the sharemode lock with get_share_mode_lock().
3326 if (file_existed && S_ISFIFO(fsp->fsp_name->st.st_ex_mode)) {
3327 DEBUG(10, ("FIFO busy\n"));
3328 return NT_STATUS_NETWORK_BUSY;
3331 DEBUG(10, ("Internal open busy\n"));
3332 return NT_STATUS_NETWORK_BUSY;
3336 * From here on we assume this is an oplock break triggered
3339 lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
3342 * No oplock from Samba around. Set up a poll every 1
3343 * second to retry a non-blocking open until the time
3346 setup_kernel_oplock_poll_open(request_time,
3349 DBG_DEBUG("No Samba oplock around after EWOULDBLOCK. "
3350 "Retrying with poll\n");
3351 return NT_STATUS_SHARING_VIOLATION;
3354 if (!validate_oplock_types(lck)) {
3355 smb_panic("validate_oplock_types failed");
3358 delay = delay_for_oplock(fsp, 0, lease, lck, false,
3360 first_open_attempt);
3362 schedule_defer_open(lck, fsp->file_id, request_time,
3365 DEBUG(10, ("Sent oplock break request to kernel "
3366 "oplock holder\n"));
3367 return NT_STATUS_SHARING_VIOLATION;
3371 * No oplock from Samba around. Set up a poll every 1
3372 * second to retry a non-blocking open until the time
3375 setup_kernel_oplock_poll_open(request_time, req, fsp->file_id);
3378 DBG_DEBUG("No Samba oplock around after EWOULDBLOCK. "
3379 "Retrying with poll\n");
3380 return NT_STATUS_SHARING_VIOLATION;
3383 if (!NT_STATUS_IS_OK(fsp_open)) {
3384 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_RETRY)) {
3385 schedule_async_open(request_time, req);
3390 if (new_file_created) {
3392 * As we atomically create using O_CREAT|O_EXCL,
3393 * then if new_file_created is true, then
3394 * file_existed *MUST* have been false (even
3395 * if the file was previously detected as being
3398 file_existed = false;
3401 if (file_existed && !check_same_dev_ino(&saved_stat, &smb_fname->st)) {
3403 * The file did exist, but some other (local or NFS)
3404 * process either renamed/unlinked and re-created the
3405 * file with different dev/ino after we walked the path,
3406 * but before we did the open. We could retry the
3407 * open but it's a rare enough case it's easier to
3408 * just fail the open to prevent creating any problems
3409 * in the open file db having the wrong dev/ino key.
3412 DBG_WARNING("file %s - dev/ino mismatch. "
3413 "Old (dev=%ju, ino=%ju). "
3414 "New (dev=%ju, ino=%ju). Failing open "
3415 "with NT_STATUS_ACCESS_DENIED.\n",
3416 smb_fname_str_dbg(smb_fname),
3417 (uintmax_t)saved_stat.st_ex_dev,
3418 (uintmax_t)saved_stat.st_ex_ino,
3419 (uintmax_t)smb_fname->st.st_ex_dev,
3420 (uintmax_t)smb_fname->st.st_ex_ino);
3421 return NT_STATUS_ACCESS_DENIED;
3424 old_write_time = smb_fname->st.st_ex_mtime;
3427 * Deal with the race condition where two smbd's detect the
3428 * file doesn't exist and do the create at the same time. One
3429 * of them will win and set a share mode, the other (ie. this
3430 * one) should check if the requested share mode for this
3431 * create is allowed.
3435 * Now the file exists and fsp is successfully opened,
3436 * fsp->dev and fsp->inode are valid and should replace the
3437 * dev=0,inode=0 from a non existent file. Spotted by
3438 * Nadav Danieli <nadavd@exanet.com>. JRA.
3443 lck = get_share_mode_lock(talloc_tos(), id,
3445 smb_fname, &old_write_time);
3448 DEBUG(0, ("open_file_ntcreate: Could not get share "
3449 "mode lock for %s\n",
3450 smb_fname_str_dbg(smb_fname)));
3452 return NT_STATUS_SHARING_VIOLATION;
3455 /* Get the types we need to examine. */
3456 if (!validate_oplock_types(lck)) {
3457 smb_panic("validate_oplock_types failed");
3460 if (has_delete_on_close(lck, fsp->name_hash)) {
3463 return NT_STATUS_DELETE_PENDING;
3466 status = open_mode_check(conn, lck,
3467 access_mask, share_access);
3469 if (NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION) ||
3470 (lck->data->num_share_modes > 0)) {
3472 * This comes from ancient times out of open_mode_check. I
3473 * have no clue whether this is still necessary. I can't think
3474 * of a case where this would actually matter further down in
3475 * this function. I leave it here for further investigation
3478 file_existed = true;
3483 * Handle oplocks, deferring the request if delay_for_oplock()
3484 * triggered a break message and we have to wait for the break
3488 bool sharing_violation = NT_STATUS_EQUAL(
3489 status, NT_STATUS_SHARING_VIOLATION);
3491 delay = delay_for_oplock(fsp, oplock_request, lease, lck,
3494 first_open_attempt);
3496 schedule_defer_open(lck, fsp->file_id,
3500 return NT_STATUS_SHARING_VIOLATION;
3504 if (!NT_STATUS_IS_OK(status)) {
3505 uint32_t can_access_mask;
3506 bool can_access = True;
3508 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
3510 /* Check if this can be done with the deny_dos and fcb
3513 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
3514 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
3516 DEBUG(0, ("DOS open without an SMB "
3520 return NT_STATUS_INTERNAL_ERROR;
3523 /* Use the client requested access mask here,
3524 * not the one we open with. */
3525 status = fcb_or_dos_open(req,
3536 if (NT_STATUS_IS_OK(status)) {
3539 *pinfo = FILE_WAS_OPENED;
3541 return NT_STATUS_OK;
3546 * This next line is a subtlety we need for
3547 * MS-Access. If a file open will fail due to share
3548 * permissions and also for security (access) reasons,
3549 * we need to return the access failed error, not the
3550 * share error. We can't open the file due to kernel
3551 * oplock deadlock (it's possible we failed above on
3552 * the open_mode_check()) so use a userspace check.
3555 if (flags & O_RDWR) {
3556 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
3557 } else if (flags & O_WRONLY) {
3558 can_access_mask = FILE_WRITE_DATA;
3560 can_access_mask = FILE_READ_DATA;
3563 if (((can_access_mask & FILE_WRITE_DATA) &&
3564 !CAN_WRITE(conn)) ||
3565 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
3568 can_access_mask))) {
3573 * If we're returning a share violation, ensure we
3574 * cope with the braindead 1 second delay (SMB1 only).
3577 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
3578 !conn->sconn->using_smb2 &&
3579 lp_defer_sharing_violations()) {
3580 struct timeval timeout;
3583 /* this is a hack to speed up torture tests
3585 timeout_usecs = lp_parm_int(SNUM(conn),
3586 "smbd","sharedelay",
3587 SHARING_VIOLATION_USEC_WAIT);
3589 /* This is a relative time, added to the absolute
3590 request_time value to get the absolute timeout time.
3591 Note that if this is the second or greater time we enter
3592 this codepath for this particular request mid then
3593 request_time is left as the absolute time of the *first*
3594 time this request mid was processed. This is what allows
3595 the request to eventually time out. */
3597 timeout = timeval_set(0, timeout_usecs);
3599 if (!request_timed_out(request_time, timeout)) {
3600 defer_open(lck, request_time, timeout, req,
3609 * We have detected a sharing violation here
3610 * so return the correct error code
3612 status = NT_STATUS_SHARING_VIOLATION;
3614 status = NT_STATUS_ACCESS_DENIED;
3619 /* Should we atomically (to the client at least) truncate ? */
3620 if ((!new_file_created) &&
3621 (flags2 & O_TRUNC) &&
3622 (!S_ISFIFO(fsp->fsp_name->st.st_ex_mode))) {
3625 ret = vfs_set_filelen(fsp, 0);
3627 status = map_nt_error_from_unix(errno);
3635 * We have the share entry *locked*.....
3638 /* Delete streams if create_disposition requires it */
3639 if (!new_file_created && clear_ads(create_disposition) &&
3640 !is_ntfs_stream_smb_fname(smb_fname)) {
3641 status = delete_all_streams(conn, smb_fname);
3642 if (!NT_STATUS_IS_OK(status)) {
3649 /* note that we ignore failure for the following. It is
3650 basically a hack for NFS, and NFS will never set one of
3651 these only read them. Nobody but Samba can ever set a deny
3652 mode and we have already checked our more authoritative
3653 locking database for permission to set this deny mode. If
3654 the kernel refuses the operations then the kernel is wrong.
3655 note that GPFS supports it as well - jmcd */
3657 if (fsp->fh->fd != -1 && lp_kernel_share_modes(SNUM(conn))) {
3660 * Beware: streams implementing VFS modules may
3661 * implement streams in a way that fsp will have the
3662 * basefile open in the fsp fd, so lacking a distinct
3663 * fd for the stream kernel_flock will apply on the
3664 * basefile which is wrong. The actual check is
3665 * deffered to the VFS module implementing the
3666 * kernel_flock call.
3668 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
3669 if(ret_flock == -1 ){
3674 return NT_STATUS_SHARING_VIOLATION;
3677 fsp->kernel_share_modes_taken = true;
3681 * At this point onwards, we can guarantee that the share entry
3682 * is locked, whether we created the file or not, and that the
3683 * deny mode is compatible with all current opens.
3687 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
3688 * but we don't have to store this - just ignore it on access check.
3690 if (conn->sconn->using_smb2) {
3692 * SMB2 doesn't return it (according to Microsoft tests).
3693 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
3694 * File created with access = 0x7 (Read, Write, Delete)
3695 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
3697 fsp->access_mask = access_mask;
3699 /* But SMB1 does. */
3700 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3705 * stat opens on existing files don't get oplocks.
3706 * They can get leases.
3708 * Note that we check for stat open on the *open_access_mask*,
3709 * i.e. the access mask we actually used to do the open,
3710 * not the one the client asked for (which is in
3711 * fsp->access_mask). This is due to the fact that
3712 * FILE_OVERWRITE and FILE_OVERWRITE_IF add in O_TRUNC,
3713 * which adds FILE_WRITE_DATA to open_access_mask.
3715 if (is_stat_open(open_access_mask) && lease == NULL) {
3716 oplock_request = NO_OPLOCK;
3720 if (new_file_created) {
3721 info = FILE_WAS_CREATED;
3723 if (flags2 & O_TRUNC) {
3724 info = FILE_WAS_OVERWRITTEN;
3726 info = FILE_WAS_OPENED;
3735 * Setup the oplock info in both the shared memory and
3738 status = grant_fsp_oplock_type(req, fsp, lck, oplock_request, lease);
3739 if (!NT_STATUS_IS_OK(status)) {
3745 /* Handle strange delete on close create semantics. */
3746 if (create_options & FILE_DELETE_ON_CLOSE) {
3747 if (!new_file_created) {
3748 status = can_set_delete_on_close(fsp,
3749 existing_dos_attributes);
3751 if (!NT_STATUS_IS_OK(status)) {
3752 /* Remember to delete the mode we just added. */
3753 del_share_mode(lck, fsp);
3759 /* Note that here we set the *initial* delete on close flag,
3760 not the regular one. The magic gets handled in close. */
3761 fsp->initial_delete_on_close = True;
3764 if (info != FILE_WAS_OPENED) {
3765 /* Overwritten files should be initially set as archive */
3766 if ((info == FILE_WAS_OVERWRITTEN && lp_map_archive(SNUM(conn))) ||
3767 lp_store_dos_attributes(SNUM(conn))) {
3769 if (file_set_dosmode(conn, smb_fname,
3770 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
3771 parent_dir, true) == 0) {
3772 unx_mode = smb_fname->st.st_ex_mode;
3778 /* Determine sparse flag. */
3780 /* POSIX opens are sparse by default. */
3781 fsp->is_sparse = true;
3783 fsp->is_sparse = (file_existed &&
3784 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
3788 * Take care of inherited ACLs on created files - if default ACL not
3792 if (!posix_open && new_file_created && !def_acl) {
3793 if (unx_mode != smb_fname->st.st_ex_mode) {
3794 int ret = SMB_VFS_FCHMOD(fsp, unx_mode);
3796 DBG_INFO("failed to reset "
3797 "attributes of file %s to 0%o\n",
3798 smb_fname_str_dbg(smb_fname),
3799 (unsigned int)unx_mode);
3803 } else if (new_unx_mode) {
3805 * We only get here in the case of:
3807 * a). Not a POSIX open.
3808 * b). File already existed.
3809 * c). File was overwritten.
3810 * d). Requested DOS attributes didn't match
3811 * the DOS attributes on the existing file.
3813 * In that case new_unx_mode has been set
3814 * equal to the calculated mode (including
3815 * possible inheritance of the mode from the
3816 * containing directory).
3818 * Note this mode was calculated with the
3819 * DOS attribute FILE_ATTRIBUTE_ARCHIVE added,
3820 * so the mode change here is suitable for
3821 * an overwritten file.
3824 if (new_unx_mode != smb_fname->st.st_ex_mode) {
3825 int ret = SMB_VFS_FCHMOD(fsp, new_unx_mode);
3827 DBG_INFO("failed to reset "
3828 "attributes of file %s to 0%o\n",
3829 smb_fname_str_dbg(smb_fname),
3830 (unsigned int)new_unx_mode);
3837 * Deal with other opens having a modified write time.
3839 struct timespec write_time = get_share_mode_write_time(lck);
3841 if (!null_timespec(write_time)) {
3842 update_stat_ex_mtime(&fsp->fsp_name->st, write_time);
3848 return NT_STATUS_OK;
3851 static NTSTATUS mkdir_internal(connection_struct *conn,
3852 struct smb_filename *smb_dname,
3853 uint32_t file_attributes)
3856 char *parent_dir = NULL;
3858 bool posix_open = false;
3859 bool need_re_stat = false;
3860 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
3862 if (!CAN_WRITE(conn) || (access_mask & ~(conn->share_access))) {
3863 DEBUG(5,("mkdir_internal: failing share access "
3864 "%s\n", lp_servicename(talloc_tos(), SNUM(conn))));
3865 return NT_STATUS_ACCESS_DENIED;
3868 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
3870 return NT_STATUS_NO_MEMORY;
3873 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3875 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
3877 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
3880 status = check_parent_access(conn,
3883 if(!NT_STATUS_IS_OK(status)) {
3884 DEBUG(5,("mkdir_internal: check_parent_access "
3885 "on directory %s for path %s returned %s\n",
3887 smb_dname->base_name,
3888 nt_errstr(status) ));
3892 if (SMB_VFS_MKDIR(conn, smb_dname, mode) != 0) {
3893 return map_nt_error_from_unix(errno);
3896 /* Ensure we're checking for a symlink here.... */
3897 /* We don't want to get caught by a symlink racer. */
3899 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
3900 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
3901 smb_fname_str_dbg(smb_dname), strerror(errno)));
3902 return map_nt_error_from_unix(errno);
3905 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
3906 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
3907 smb_fname_str_dbg(smb_dname)));
3908 return NT_STATUS_NOT_A_DIRECTORY;
3911 if (lp_store_dos_attributes(SNUM(conn))) {
3913 file_set_dosmode(conn, smb_dname,
3914 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
3919 if (lp_inherit_permissions(SNUM(conn))) {
3920 inherit_access_posix_acl(conn, parent_dir,
3922 need_re_stat = true;
3927 * Check if high bits should have been set,
3928 * then (if bits are missing): add them.
3929 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
3932 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
3933 (mode & ~smb_dname->st.st_ex_mode)) {
3934 SMB_VFS_CHMOD(conn, smb_dname,
3935 (smb_dname->st.st_ex_mode |
3936 (mode & ~smb_dname->st.st_ex_mode)));
3937 need_re_stat = true;
3941 /* Change the owner if required. */
3942 if (lp_inherit_owner(SNUM(conn)) != INHERIT_OWNER_NO) {
3943 change_dir_owner_to_parent(conn, parent_dir,
3946 need_re_stat = true;
3950 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
3951 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
3952 smb_fname_str_dbg(smb_dname), strerror(errno)));
3953 return map_nt_error_from_unix(errno);
3957 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
3958 smb_dname->base_name);
3960 return NT_STATUS_OK;
3963 /****************************************************************************
3964 Open a directory from an NT SMB call.
3965 ****************************************************************************/
3967 static NTSTATUS open_directory(connection_struct *conn,
3968 struct smb_request *req,
3969 struct smb_filename *smb_dname,
3970 uint32_t access_mask,
3971 uint32_t share_access,
3972 uint32_t create_disposition,
3973 uint32_t create_options,
3974 uint32_t file_attributes,
3976 files_struct **result)
3978 files_struct *fsp = NULL;
3979 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
3980 struct share_mode_lock *lck = NULL;
3982 struct timespec mtimespec;
3986 if (is_ntfs_stream_smb_fname(smb_dname)) {
3987 DEBUG(2, ("open_directory: %s is a stream name!\n",
3988 smb_fname_str_dbg(smb_dname)));
3989 return NT_STATUS_NOT_A_DIRECTORY;
3992 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
3993 /* Ensure we have a directory attribute. */
3994 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
3997 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
3998 "share_access = 0x%x create_options = 0x%x, "
3999 "create_disposition = 0x%x, file_attributes = 0x%x\n",
4000 smb_fname_str_dbg(smb_dname),
4001 (unsigned int)access_mask,
4002 (unsigned int)share_access,
4003 (unsigned int)create_options,
4004 (unsigned int)create_disposition,
4005 (unsigned int)file_attributes));
4007 status = smbd_calculate_access_mask(conn, smb_dname, false,
4008 access_mask, &access_mask);
4009 if (!NT_STATUS_IS_OK(status)) {
4010 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
4011 "on file %s returned %s\n",
4012 smb_fname_str_dbg(smb_dname),
4013 nt_errstr(status)));
4017 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
4018 !security_token_has_privilege(get_current_nttok(conn),
4019 SEC_PRIV_SECURITY)) {
4020 DEBUG(10, ("open_directory: open on %s "
4021 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
4022 smb_fname_str_dbg(smb_dname)));
4023 return NT_STATUS_PRIVILEGE_NOT_HELD;
4026 switch( create_disposition ) {
4030 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
4033 info = FILE_WAS_OPENED;
4038 /* If directory exists error. If directory doesn't
4042 status = NT_STATUS_OBJECT_NAME_COLLISION;
4043 DEBUG(2, ("open_directory: unable to create "
4044 "%s. Error was %s\n",
4045 smb_fname_str_dbg(smb_dname),
4046 nt_errstr(status)));
4050 status = mkdir_internal(conn, smb_dname,
4053 if (!NT_STATUS_IS_OK(status)) {
4054 DEBUG(2, ("open_directory: unable to create "
4055 "%s. Error was %s\n",
4056 smb_fname_str_dbg(smb_dname),
4057 nt_errstr(status)));
4061 info = FILE_WAS_CREATED;
4066 * If directory exists open. If directory doesn't
4071 status = NT_STATUS_OK;
4072 info = FILE_WAS_OPENED;
4074 status = mkdir_internal(conn, smb_dname,
4077 if (NT_STATUS_IS_OK(status)) {
4078 info = FILE_WAS_CREATED;
4080 /* Cope with create race. */
4081 if (!NT_STATUS_EQUAL(status,
4082 NT_STATUS_OBJECT_NAME_COLLISION)) {
4083 DEBUG(2, ("open_directory: unable to create "
4084 "%s. Error was %s\n",
4085 smb_fname_str_dbg(smb_dname),
4086 nt_errstr(status)));
4091 * If mkdir_internal() returned
4092 * NT_STATUS_OBJECT_NAME_COLLISION
4093 * we still must lstat the path.
4096 if (SMB_VFS_LSTAT(conn, smb_dname)
4098 DEBUG(2, ("Could not stat "
4099 "directory '%s' just "
4104 return map_nt_error_from_unix(
4108 info = FILE_WAS_OPENED;
4114 case FILE_SUPERSEDE:
4115 case FILE_OVERWRITE:
4116 case FILE_OVERWRITE_IF:
4118 DEBUG(5,("open_directory: invalid create_disposition "
4119 "0x%x for directory %s\n",
4120 (unsigned int)create_disposition,
4121 smb_fname_str_dbg(smb_dname)));
4122 return NT_STATUS_INVALID_PARAMETER;
4125 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
4126 DEBUG(5,("open_directory: %s is not a directory !\n",
4127 smb_fname_str_dbg(smb_dname)));
4128 return NT_STATUS_NOT_A_DIRECTORY;
4131 if (info == FILE_WAS_OPENED) {
4132 status = smbd_check_access_rights(conn,
4136 if (!NT_STATUS_IS_OK(status)) {
4137 DEBUG(10, ("open_directory: smbd_check_access_rights on "
4138 "file %s failed with %s\n",
4139 smb_fname_str_dbg(smb_dname),
4140 nt_errstr(status)));
4145 status = file_new(req, conn, &fsp);
4146 if(!NT_STATUS_IS_OK(status)) {
4151 * Setup the files_struct for it.
4154 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
4155 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
4156 fsp->file_pid = req ? req->smbpid : 0;
4157 fsp->can_lock = False;
4158 fsp->can_read = False;
4159 fsp->can_write = False;
4161 fsp->share_access = share_access;
4162 fsp->fh->private_options = 0;
4164 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
4166 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
4167 fsp->print_file = NULL;
4168 fsp->modified = False;
4169 fsp->oplock_type = NO_OPLOCK;
4170 fsp->sent_oplock_break = NO_BREAK_SENT;
4171 fsp->is_directory = True;
4172 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
4173 fsp->posix_flags |= FSP_POSIX_FLAGS_ALL;
4175 status = fsp_set_smb_fname(fsp, smb_dname);
4176 if (!NT_STATUS_IS_OK(status)) {
4177 file_free(req, fsp);
4181 /* Don't store old timestamps for directory
4182 handles in the internal database. We don't
4183 update them in there if new objects
4184 are creaded in the directory. Currently
4185 we only update timestamps on file writes.
4188 ZERO_STRUCT(mtimespec);
4190 if (access_mask & (FILE_LIST_DIRECTORY|
4192 FILE_ADD_SUBDIRECTORY|
4195 FILE_DELETE_CHILD)) {
4197 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
4199 /* POSIX allows us to open a directory with O_RDONLY. */
4200 status = fd_open(conn, fsp, O_RDONLY, 0);
4202 if (!NT_STATUS_IS_OK(status)) {
4203 DEBUG(5, ("open_directory: Could not open fd for "
4205 smb_fname_str_dbg(smb_dname),
4206 nt_errstr(status)));
4207 file_free(req, fsp);
4212 DEBUG(10, ("Not opening Directory %s\n",
4213 smb_fname_str_dbg(smb_dname)));
4216 status = vfs_stat_fsp(fsp);
4217 if (!NT_STATUS_IS_OK(status)) {
4219 file_free(req, fsp);
4223 if(!S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
4224 DEBUG(5,("open_directory: %s is not a directory !\n",
4225 smb_fname_str_dbg(smb_dname)));
4227 file_free(req, fsp);
4228 return NT_STATUS_NOT_A_DIRECTORY;
4231 /* Ensure there was no race condition. We need to check
4232 * dev/inode but not permissions, as these can change
4234 if (!check_same_dev_ino(&smb_dname->st, &fsp->fsp_name->st)) {
4235 DEBUG(5,("open_directory: stat struct differs for "
4237 smb_fname_str_dbg(smb_dname)));
4239 file_free(req, fsp);
4240 return NT_STATUS_ACCESS_DENIED;
4243 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
4244 conn->connectpath, smb_dname,
4248 DEBUG(0, ("open_directory: Could not get share mode lock for "
4249 "%s\n", smb_fname_str_dbg(smb_dname)));
4251 file_free(req, fsp);
4252 return NT_STATUS_SHARING_VIOLATION;
4255 if (has_delete_on_close(lck, fsp->name_hash)) {
4258 file_free(req, fsp);
4259 return NT_STATUS_DELETE_PENDING;
4262 status = open_mode_check(conn, lck,
4263 access_mask, share_access);
4265 if (!NT_STATUS_IS_OK(status)) {
4268 file_free(req, fsp);
4272 ok = set_share_mode(lck, fsp, get_current_uid(conn),
4273 req ? req->mid : 0, NO_OPLOCK,
4278 file_free(req, fsp);
4279 return NT_STATUS_NO_MEMORY;
4282 /* For directories the delete on close bit at open time seems
4283 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
4284 if (create_options & FILE_DELETE_ON_CLOSE) {
4285 status = can_set_delete_on_close(fsp, 0);
4286 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
4287 del_share_mode(lck, fsp);
4290 file_free(req, fsp);
4294 if (NT_STATUS_IS_OK(status)) {
4295 /* Note that here we set the *initial* delete on close flag,
4296 not the regular one. The magic gets handled in close. */
4297 fsp->initial_delete_on_close = True;
4303 * Deal with other opens having a modified write time. Is this
4304 * possible for directories?
4306 struct timespec write_time = get_share_mode_write_time(lck);
4308 if (!null_timespec(write_time)) {
4309 update_stat_ex_mtime(&fsp->fsp_name->st, write_time);
4320 return NT_STATUS_OK;
4323 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
4324 struct smb_filename *smb_dname)
4329 status = SMB_VFS_CREATE_FILE(
4332 0, /* root_dir_fid */
4333 smb_dname, /* fname */
4334 FILE_READ_ATTRIBUTES, /* access_mask */
4335 FILE_SHARE_NONE, /* share_access */
4336 FILE_CREATE, /* create_disposition*/
4337 FILE_DIRECTORY_FILE, /* create_options */
4338 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
4339 0, /* oplock_request */
4341 0, /* allocation_size */
4342 0, /* private_flags */
4347 NULL, NULL); /* create context */
4349 if (NT_STATUS_IS_OK(status)) {
4350 close_file(req, fsp, NORMAL_CLOSE);
4356 /****************************************************************************
4357 Receive notification that one of our open files has been renamed by another
4359 ****************************************************************************/
4361 void msg_file_was_renamed(struct messaging_context *msg,
4364 struct server_id server_id,
4368 char *frm = (char *)data->data;
4370 const char *sharepath;
4371 const char *base_name;
4372 const char *stream_name;
4373 struct smb_filename *smb_fname = NULL;
4374 size_t sp_len, bn_len;
4376 struct smbd_server_connection *sconn =
4377 talloc_get_type_abort(private_data,
4378 struct smbd_server_connection);
4380 if (data->data == NULL
4381 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
4382 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
4383 (int)data->length));
4387 /* Unpack the message. */
4388 pull_file_id_24(frm, &id);
4389 sharepath = &frm[24];
4390 sp_len = strlen(sharepath);
4391 base_name = sharepath + sp_len + 1;
4392 bn_len = strlen(base_name);
4393 stream_name = sharepath + sp_len + 1 + bn_len + 1;
4395 /* stream_name must always be NULL if there is no stream. */
4396 if (stream_name[0] == '\0') {
4400 smb_fname = synthetic_smb_fname(talloc_tos(),
4405 if (smb_fname == NULL) {
4409 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
4411 sharepath, smb_fname_str_dbg(smb_fname),
4412 file_id_string_tos(&id)));
4414 for(fsp = file_find_di_first(sconn, id); fsp;
4415 fsp = file_find_di_next(fsp)) {
4416 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
4418 DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
4419 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
4420 smb_fname_str_dbg(smb_fname)));
4421 status = fsp_set_smb_fname(fsp, smb_fname);
4422 if (!NT_STATUS_IS_OK(status)) {
4427 /* Now we have the complete path we can work out if this is
4428 actually within this share and adjust newname accordingly. */
4429 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
4430 "not sharepath %s) "
4431 "%s from %s -> %s\n",
4432 fsp->conn->connectpath,
4436 smb_fname_str_dbg(smb_fname)));
4440 TALLOC_FREE(smb_fname);
4445 * If a main file is opened for delete, all streams need to be checked for
4446 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
4447 * If that works, delete them all by setting the delete on close and close.
4450 static NTSTATUS open_streams_for_delete(connection_struct *conn,
4451 const struct smb_filename *smb_fname)
4453 struct stream_struct *stream_info = NULL;
4454 files_struct **streams = NULL;
4456 unsigned int num_streams = 0;
4457 TALLOC_CTX *frame = talloc_stackframe();
4460 status = vfs_streaminfo(conn, NULL, smb_fname, talloc_tos(),
4461 &num_streams, &stream_info);
4463 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
4464 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
4465 DEBUG(10, ("no streams around\n"));
4467 return NT_STATUS_OK;
4470 if (!NT_STATUS_IS_OK(status)) {
4471 DEBUG(10, ("vfs_streaminfo failed: %s\n",
4472 nt_errstr(status)));
4476 DEBUG(10, ("open_streams_for_delete found %d streams\n",
4479 if (num_streams == 0) {
4481 return NT_STATUS_OK;
4484 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
4485 if (streams == NULL) {
4486 DEBUG(0, ("talloc failed\n"));
4487 status = NT_STATUS_NO_MEMORY;
4491 for (i=0; i<num_streams; i++) {
4492 struct smb_filename *smb_fname_cp;
4494 if (strequal(stream_info[i].name, "::$DATA")) {
4499 smb_fname_cp = synthetic_smb_fname(talloc_tos(),
4500 smb_fname->base_name,
4501 stream_info[i].name,
4504 ~SMB_FILENAME_POSIX_PATH));
4505 if (smb_fname_cp == NULL) {
4506 status = NT_STATUS_NO_MEMORY;
4510 if (SMB_VFS_STAT(conn, smb_fname_cp) == -1) {
4511 DEBUG(10, ("Unable to stat stream: %s\n",
4512 smb_fname_str_dbg(smb_fname_cp)));
4515 status = SMB_VFS_CREATE_FILE(
4518 0, /* root_dir_fid */
4519 smb_fname_cp, /* fname */
4520 DELETE_ACCESS, /* access_mask */
4521 (FILE_SHARE_READ | /* share_access */
4522 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
4523 FILE_OPEN, /* create_disposition*/
4524 0, /* create_options */
4525 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
4526 0, /* oplock_request */
4528 0, /* allocation_size */
4529 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
4532 &streams[i], /* result */
4534 NULL, NULL); /* create context */
4536 if (!NT_STATUS_IS_OK(status)) {
4537 DEBUG(10, ("Could not open stream %s: %s\n",
4538 smb_fname_str_dbg(smb_fname_cp),
4539 nt_errstr(status)));
4541 TALLOC_FREE(smb_fname_cp);
4544 TALLOC_FREE(smb_fname_cp);
4548 * don't touch the variable "status" beyond this point :-)
4551 for (i -= 1 ; i >= 0; i--) {
4552 if (streams[i] == NULL) {
4556 DEBUG(10, ("Closing stream # %d, %s\n", i,
4557 fsp_str_dbg(streams[i])));
4558 close_file(NULL, streams[i], NORMAL_CLOSE);
4566 /*********************************************************************
4567 Create a default ACL by inheriting from the parent. If no inheritance
4568 from the parent available, don't set anything. This will leave the actual
4569 permissions the new file or directory already got from the filesystem
4570 as the NT ACL when read.
4571 *********************************************************************/
4573 static NTSTATUS inherit_new_acl(files_struct *fsp)
4575 TALLOC_CTX *frame = talloc_stackframe();
4576 char *parent_name = NULL;
4577 struct security_descriptor *parent_desc = NULL;
4578 NTSTATUS status = NT_STATUS_OK;
4579 struct security_descriptor *psd = NULL;
4580 const struct dom_sid *owner_sid = NULL;
4581 const struct dom_sid *group_sid = NULL;
4582 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
4583 struct security_token *token = fsp->conn->session_info->security_token;
4584 bool inherit_owner =
4585 (lp_inherit_owner(SNUM(fsp->conn)) == INHERIT_OWNER_WINDOWS_AND_UNIX);
4586 bool inheritable_components = false;
4587 bool try_builtin_administrators = false;
4588 const struct dom_sid *BA_U_sid = NULL;
4589 const struct dom_sid *BA_G_sid = NULL;
4590 bool try_system = false;
4591 const struct dom_sid *SY_U_sid = NULL;
4592 const struct dom_sid *SY_G_sid = NULL;
4594 struct smb_filename *parent_smb_fname = NULL;
4596 if (!parent_dirname(frame, fsp->fsp_name->base_name, &parent_name, NULL)) {
4598 return NT_STATUS_NO_MEMORY;
4600 parent_smb_fname = synthetic_smb_fname(talloc_tos(),
4604 fsp->fsp_name->flags);
4606 if (parent_smb_fname == NULL) {
4608 return NT_STATUS_NO_MEMORY;
4611 status = SMB_VFS_GET_NT_ACL(fsp->conn,
4613 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
4616 if (!NT_STATUS_IS_OK(status)) {
4621 inheritable_components = sd_has_inheritable_components(parent_desc,
4624 if (!inheritable_components && !inherit_owner) {
4626 /* Nothing to inherit and not setting owner. */
4627 return NT_STATUS_OK;
4630 /* Create an inherited descriptor from the parent. */
4632 if (DEBUGLEVEL >= 10) {
4633 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
4634 fsp_str_dbg(fsp) ));
4635 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
4638 /* Inherit from parent descriptor if "inherit owner" set. */
4639 if (inherit_owner) {
4640 owner_sid = parent_desc->owner_sid;
4641 group_sid = parent_desc->group_sid;
4644 if (owner_sid == NULL) {
4645 if (security_token_has_builtin_administrators(token)) {
4646 try_builtin_administrators = true;
4647 } else if (security_token_is_system(token)) {
4648 try_builtin_administrators = true;
4653 if (group_sid == NULL &&
4654 token->num_sids == PRIMARY_GROUP_SID_INDEX)
4656 if (security_token_is_system(token)) {
4657 try_builtin_administrators = true;
4662 if (try_builtin_administrators) {
4667 ok = sids_to_unixids(&global_sid_Builtin_Administrators, 1, &ids);
4671 BA_U_sid = &global_sid_Builtin_Administrators;
4672 BA_G_sid = &global_sid_Builtin_Administrators;
4675 BA_U_sid = &global_sid_Builtin_Administrators;
4678 BA_G_sid = &global_sid_Builtin_Administrators;
4691 ok = sids_to_unixids(&global_sid_System, 1, &ids);
4695 SY_U_sid = &global_sid_System;
4696 SY_G_sid = &global_sid_System;
4699 SY_U_sid = &global_sid_System;
4702 SY_G_sid = &global_sid_System;
4710 if (owner_sid == NULL) {
4711 owner_sid = BA_U_sid;
4714 if (owner_sid == NULL) {
4715 owner_sid = SY_U_sid;
4718 if (group_sid == NULL) {
4719 group_sid = SY_G_sid;
4722 if (try_system && group_sid == NULL) {
4723 group_sid = BA_G_sid;
4726 if (owner_sid == NULL) {
4727 owner_sid = &token->sids[PRIMARY_USER_SID_INDEX];
4729 if (group_sid == NULL) {
4730 if (token->num_sids == PRIMARY_GROUP_SID_INDEX) {
4731 group_sid = &token->sids[PRIMARY_USER_SID_INDEX];
4733 group_sid = &token->sids[PRIMARY_GROUP_SID_INDEX];
4737 status = se_create_child_secdesc(frame,
4744 if (!NT_STATUS_IS_OK(status)) {
4749 /* If inheritable_components == false,
4750 se_create_child_secdesc()
4751 creates a security descriptor with a NULL dacl
4752 entry, but with SEC_DESC_DACL_PRESENT. We need
4753 to remove that flag. */
4755 if (!inheritable_components) {
4756 security_info_sent &= ~SECINFO_DACL;
4757 psd->type &= ~SEC_DESC_DACL_PRESENT;
4760 if (DEBUGLEVEL >= 10) {
4761 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
4762 fsp_str_dbg(fsp) ));
4763 NDR_PRINT_DEBUG(security_descriptor, psd);
4766 if (inherit_owner) {
4767 /* We need to be root to force this. */
4770 status = SMB_VFS_FSET_NT_ACL(fsp,
4773 if (inherit_owner) {
4781 * If we already have a lease, it must match the new file id. [MS-SMB2]
4782 * 3.3.5.9.8 speaks about INVALID_PARAMETER if an already used lease key is
4783 * used for a different file name.
4786 struct lease_match_state {
4787 /* Input parameters. */
4788 TALLOC_CTX *mem_ctx;
4789 const char *servicepath;
4790 const struct smb_filename *fname;
4793 /* Return parameters. */
4794 uint32_t num_file_ids;
4795 struct file_id *ids;
4796 NTSTATUS match_status;
4799 /*************************************************************
4800 File doesn't exist but this lease key+guid is already in use.
4802 This is only allowable in the dynamic share case where the
4803 service path must be different.
4805 There is a small race condition here in the multi-connection
4806 case where a client sends two create calls on different connections,
4807 where the file doesn't exist and one smbd creates the leases_db
4808 entry first, but this will get fixed by the multichannel cleanup
4809 when all identical client_guids get handled by a single smbd.
4810 **************************************************************/
4812 static void lease_match_parser_new_file(
4814 const struct leases_db_file *files,
4815 struct lease_match_state *state)
4819 for (i = 0; i < num_files; i++) {
4820 const struct leases_db_file *f = &files[i];
4821 if (strequal(state->servicepath, f->servicepath)) {
4822 state->match_status = NT_STATUS_INVALID_PARAMETER;
4827 /* Dynamic share case. Break leases on all other files. */
4828 state->match_status = leases_db_copy_file_ids(state->mem_ctx,
4832 if (!NT_STATUS_IS_OK(state->match_status)) {
4836 state->num_file_ids = num_files;
4837 state->match_status = NT_STATUS_OPLOCK_NOT_GRANTED;
4841 static void lease_match_parser(
4843 const struct leases_db_file *files,
4846 struct lease_match_state *state =
4847 (struct lease_match_state *)private_data;
4850 if (!state->file_existed) {
4852 * Deal with name mismatch or
4853 * possible dynamic share case separately
4854 * to make code clearer.
4856 lease_match_parser_new_file(num_files,
4863 state->match_status = NT_STATUS_OK;
4865 for (i = 0; i < num_files; i++) {
4866 const struct leases_db_file *f = &files[i];
4868 /* Everything should be the same. */
4869 if (!file_id_equal(&state->id, &f->id)) {
4870 /* This should catch all dynamic share cases. */
4871 state->match_status = NT_STATUS_OPLOCK_NOT_GRANTED;
4874 if (!strequal(f->servicepath, state->servicepath)) {
4875 state->match_status = NT_STATUS_INVALID_PARAMETER;
4878 if (!strequal(f->base_name, state->fname->base_name)) {
4879 state->match_status = NT_STATUS_INVALID_PARAMETER;
4882 if (!strequal(f->stream_name, state->fname->stream_name)) {
4883 state->match_status = NT_STATUS_INVALID_PARAMETER;
4888 if (NT_STATUS_IS_OK(state->match_status)) {
4890 * Common case - just opening another handle on a
4891 * file on a non-dynamic share.
4896 if (NT_STATUS_EQUAL(state->match_status, NT_STATUS_INVALID_PARAMETER)) {
4897 /* Mismatched path. Error back to client. */
4902 * File id mismatch. Dynamic share case NT_STATUS_OPLOCK_NOT_GRANTED.
4903 * Don't allow leases.
4906 state->match_status = leases_db_copy_file_ids(state->mem_ctx,
4910 if (!NT_STATUS_IS_OK(state->match_status)) {
4914 state->num_file_ids = num_files;
4915 state->match_status = NT_STATUS_OPLOCK_NOT_GRANTED;
4919 static NTSTATUS lease_match(connection_struct *conn,
4920 struct smb_request *req,
4921 struct smb2_lease_key *lease_key,
4922 const char *servicepath,
4923 const struct smb_filename *fname,
4924 uint16_t *p_version,
4927 struct smbd_server_connection *sconn = req->sconn;
4928 TALLOC_CTX *tos = talloc_tos();
4929 struct lease_match_state state = {
4931 .servicepath = servicepath,
4933 .match_status = NT_STATUS_OK
4938 state.file_existed = VALID_STAT(fname->st);
4939 if (state.file_existed) {
4940 state.id = vfs_file_id_from_sbuf(conn, &fname->st);
4943 status = leases_db_parse(&sconn->client->connections->smb2.client.guid,
4944 lease_key, lease_match_parser, &state);
4945 if (!NT_STATUS_IS_OK(status)) {
4947 * Not found or error means okay: We can make the lease pass
4949 return NT_STATUS_OK;
4951 if (!NT_STATUS_EQUAL(state.match_status, NT_STATUS_OPLOCK_NOT_GRANTED)) {
4953 * Anything but NT_STATUS_OPLOCK_NOT_GRANTED, let the caller
4956 return state.match_status;
4959 /* We have to break all existing leases. */
4960 for (i = 0; i < state.num_file_ids; i++) {
4961 struct share_mode_lock *lck;
4962 struct share_mode_data *d;
4965 if (file_id_equal(&state.ids[i], &state.id)) {
4966 /* Don't need to break our own file. */
4970 lck = get_existing_share_mode_lock(talloc_tos(), state.ids[i]);
4972 /* Race condition - file already closed. */
4976 for (j=0; j<d->num_share_modes; j++) {
4977 struct share_mode_entry *e = &d->share_modes[j];
4978 uint32_t e_lease_type = get_lease_type(d, e);
4980 if (share_mode_stale_pid(d, j)) {
4984 if (e->op_type == LEASE_OPLOCK) {
4985 struct share_mode_lease *l = NULL;
4986 l = &lck->data->leases[e->lease_idx];
4987 if (!smb2_lease_key_equal(&l->lease_key,
4991 *p_epoch = l->epoch;
4992 *p_version = l->lease_version;
4995 if (e_lease_type == SMB2_LEASE_NONE) {
4999 send_break_message(conn->sconn->msg_ctx, &d->id, e,
5003 * Windows 7 and 8 lease clients
5004 * are broken in that they will not
5005 * respond to lease break requests
5006 * whilst waiting for an outstanding
5007 * open request on that lease handle
5008 * on the same TCP connection, due
5009 * to holding an internal inode lock.
5011 * This means we can't reschedule
5012 * ourselves here, but must return
5017 * Send the breaks and then return
5018 * SMB2_LEASE_NONE in the lease handle
5019 * to cause them to acknowledge the
5020 * lease break. Consultation with
5021 * Microsoft engineering confirmed
5022 * this approach is safe.
5029 * Ensure we don't grant anything more so we
5032 return NT_STATUS_OPLOCK_NOT_GRANTED;
5036 * Wrapper around open_file_ntcreate and open_directory
5039 static NTSTATUS create_file_unixpath(connection_struct *conn,
5040 struct smb_request *req,
5041 struct smb_filename *smb_fname,
5042 uint32_t access_mask,
5043 uint32_t share_access,
5044 uint32_t create_disposition,
5045 uint32_t create_options,
5046 uint32_t file_attributes,
5047 uint32_t oplock_request,
5048 struct smb2_lease *lease,
5049 uint64_t allocation_size,
5050 uint32_t private_flags,
5051 struct security_descriptor *sd,
5052 struct ea_list *ea_list,
5054 files_struct **result,
5057 int info = FILE_WAS_OPENED;
5058 files_struct *base_fsp = NULL;
5059 files_struct *fsp = NULL;
5062 DBG_DEBUG("create_file_unixpath: access_mask = 0x%x "
5063 "file_attributes = 0x%x, share_access = 0x%x, "
5064 "create_disposition = 0x%x create_options = 0x%x "
5065 "oplock_request = 0x%x private_flags = 0x%x "
5066 "ea_list = %p, sd = %p, "
5068 (unsigned int)access_mask,
5069 (unsigned int)file_attributes,
5070 (unsigned int)share_access,
5071 (unsigned int)create_disposition,
5072 (unsigned int)create_options,
5073 (unsigned int)oplock_request,
5074 (unsigned int)private_flags,
5075 ea_list, sd, smb_fname_str_dbg(smb_fname));
5077 if (create_options & FILE_OPEN_BY_FILE_ID) {
5078 status = NT_STATUS_NOT_SUPPORTED;
5082 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
5083 status = NT_STATUS_INVALID_PARAMETER;
5088 oplock_request |= INTERNAL_OPEN_ONLY;
5091 if (lease != NULL) {
5092 uint16_t epoch = lease->lease_epoch;
5093 uint16_t version = lease->lease_version;
5096 DBG_WARNING("Got lease on internal open\n");
5097 status = NT_STATUS_INTERNAL_ERROR;
5101 status = lease_match(conn,
5108 if (NT_STATUS_EQUAL(status, NT_STATUS_OPLOCK_NOT_GRANTED)) {
5109 /* Dynamic share file. No leases and update epoch... */
5110 lease->lease_state = SMB2_LEASE_NONE;
5111 lease->lease_epoch = epoch;
5112 lease->lease_version = version;
5113 } else if (!NT_STATUS_IS_OK(status)) {
5118 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
5119 && (access_mask & DELETE_ACCESS)
5120 && !is_ntfs_stream_smb_fname(smb_fname)) {
5122 * We can't open a file with DELETE access if any of the
5123 * streams is open without FILE_SHARE_DELETE
5125 status = open_streams_for_delete(conn, smb_fname);
5127 if (!NT_STATUS_IS_OK(status)) {
5132 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
5133 !security_token_has_privilege(get_current_nttok(conn),
5134 SEC_PRIV_SECURITY)) {
5135 DEBUG(10, ("create_file_unixpath: open on %s "
5136 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
5137 smb_fname_str_dbg(smb_fname)));
5138 status = NT_STATUS_PRIVILEGE_NOT_HELD;
5143 * Files or directories can't be opened DELETE_ON_CLOSE without
5145 * BUG: https://bugzilla.samba.org/show_bug.cgi?id=13358
5147 if (create_options & FILE_DELETE_ON_CLOSE) {
5148 if ((access_mask & DELETE_ACCESS) == 0) {
5149 status = NT_STATUS_INVALID_PARAMETER;
5154 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
5155 && is_ntfs_stream_smb_fname(smb_fname)
5156 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
5157 uint32_t base_create_disposition;
5158 struct smb_filename *smb_fname_base = NULL;
5159 uint32_t base_privflags;
5161 if (create_options & FILE_DIRECTORY_FILE) {
5162 status = NT_STATUS_NOT_A_DIRECTORY;
5166 switch (create_disposition) {
5168 base_create_disposition = FILE_OPEN;
5171 base_create_disposition = FILE_OPEN_IF;
5175 /* Create an smb_filename with stream_name == NULL. */
5176 smb_fname_base = synthetic_smb_fname(talloc_tos(),
5177 smb_fname->base_name,
5181 if (smb_fname_base == NULL) {
5182 status = NT_STATUS_NO_MEMORY;
5186 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
5187 DEBUG(10, ("Unable to stat stream: %s\n",
5188 smb_fname_str_dbg(smb_fname_base)));
5191 * https://bugzilla.samba.org/show_bug.cgi?id=10229
5192 * We need to check if the requested access mask
5193 * could be used to open the underlying file (if
5194 * it existed), as we're passing in zero for the
5195 * access mask to the base filename.
5197 status = check_base_file_access(conn,
5201 if (!NT_STATUS_IS_OK(status)) {
5202 DEBUG(10, ("Permission check "
5203 "for base %s failed: "
5204 "%s\n", smb_fname->base_name,
5205 nt_errstr(status)));
5210 base_privflags = NTCREATEX_OPTIONS_PRIVATE_STREAM_BASEOPEN;
5212 /* Open the base file. */
5213 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
5216 | FILE_SHARE_DELETE,
5217 base_create_disposition,
5222 TALLOC_FREE(smb_fname_base);
5224 if (!NT_STATUS_IS_OK(status)) {
5225 DEBUG(10, ("create_file_unixpath for base %s failed: "
5226 "%s\n", smb_fname->base_name,
5227 nt_errstr(status)));
5230 /* we don't need the low level fd */
5235 * If it's a request for a directory open, deal with it separately.
5238 if (create_options & FILE_DIRECTORY_FILE) {
5240 if (create_options & FILE_NON_DIRECTORY_FILE) {
5241 status = NT_STATUS_INVALID_PARAMETER;
5245 /* Can't open a temp directory. IFS kit test. */
5246 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
5247 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
5248 status = NT_STATUS_INVALID_PARAMETER;
5253 * We will get a create directory here if the Win32
5254 * app specified a security descriptor in the
5255 * CreateDirectory() call.
5259 status = open_directory(
5260 conn, req, smb_fname, access_mask, share_access,
5261 create_disposition, create_options, file_attributes,
5266 * Ordinary file case.
5269 status = file_new(req, conn, &fsp);
5270 if(!NT_STATUS_IS_OK(status)) {
5274 status = fsp_set_smb_fname(fsp, smb_fname);
5275 if (!NT_STATUS_IS_OK(status)) {
5281 * We're opening the stream element of a
5282 * base_fsp we already opened. Set up the
5285 fsp->base_fsp = base_fsp;
5288 if (allocation_size) {
5289 fsp->initial_allocation_size = smb_roundup(fsp->conn,
5293 status = open_file_ntcreate(conn,
5306 if(!NT_STATUS_IS_OK(status)) {
5307 file_free(req, fsp);
5311 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
5313 /* A stream open never opens a directory */
5316 status = NT_STATUS_FILE_IS_A_DIRECTORY;
5321 * Fail the open if it was explicitly a non-directory
5325 if (create_options & FILE_NON_DIRECTORY_FILE) {
5326 status = NT_STATUS_FILE_IS_A_DIRECTORY;
5331 status = open_directory(
5332 conn, req, smb_fname, access_mask,
5333 share_access, create_disposition,
5334 create_options, file_attributes,
5339 if (!NT_STATUS_IS_OK(status)) {
5343 fsp->base_fsp = base_fsp;
5345 if ((ea_list != NULL) &&
5346 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
5347 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
5348 if (!NT_STATUS_IS_OK(status)) {
5353 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
5354 status = NT_STATUS_ACCESS_DENIED;
5358 /* Save the requested allocation size. */
5359 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
5360 if ((allocation_size > fsp->fsp_name->st.st_ex_size)
5361 && !(fsp->is_directory))
5363 fsp->initial_allocation_size = smb_roundup(
5364 fsp->conn, allocation_size);
5365 if (vfs_allocate_file_space(
5366 fsp, fsp->initial_allocation_size) == -1) {
5367 status = NT_STATUS_DISK_FULL;
5371 fsp->initial_allocation_size = smb_roundup(
5372 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
5375 fsp->initial_allocation_size = 0;
5378 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
5379 fsp->base_fsp == NULL) {
5382 * According to the MS documentation, the only time the security
5383 * descriptor is applied to the opened file is iff we *created* the
5384 * file; an existing file stays the same.
5386 * Also, it seems (from observation) that you can open the file with
5387 * any access mask but you can still write the sd. We need to override
5388 * the granted access before we call set_sd
5389 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
5392 uint32_t sec_info_sent;
5393 uint32_t saved_access_mask = fsp->access_mask;
5395 sec_info_sent = get_sec_info(sd);
5397 fsp->access_mask = FILE_GENERIC_ALL;
5399 if (sec_info_sent & (SECINFO_OWNER|
5403 status = set_sd(fsp, sd, sec_info_sent);
5406 fsp->access_mask = saved_access_mask;
5408 if (!NT_STATUS_IS_OK(status)) {
5411 } else if (lp_inherit_acls(SNUM(conn))) {
5412 /* Inherit from parent. Errors here are not fatal. */
5413 status = inherit_new_acl(fsp);
5414 if (!NT_STATUS_IS_OK(status)) {
5415 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
5417 nt_errstr(status) ));
5422 if ((conn->fs_capabilities & FILE_FILE_COMPRESSION)
5423 && (create_options & FILE_NO_COMPRESSION)
5424 && (info == FILE_WAS_CREATED)) {
5425 status = SMB_VFS_SET_COMPRESSION(conn, fsp, fsp,
5426 COMPRESSION_FORMAT_NONE);
5427 if (!NT_STATUS_IS_OK(status)) {
5428 DEBUG(1, ("failed to disable compression: %s\n",
5429 nt_errstr(status)));
5433 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
5436 if (pinfo != NULL) {
5440 smb_fname->st = fsp->fsp_name->st;
5442 return NT_STATUS_OK;
5445 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
5448 if (base_fsp && fsp->base_fsp == base_fsp) {
5450 * The close_file below will close
5455 close_file(req, fsp, ERROR_CLOSE);
5458 if (base_fsp != NULL) {
5459 close_file(req, base_fsp, ERROR_CLOSE);
5466 * Calculate the full path name given a relative fid.
5468 NTSTATUS get_relative_fid_filename(connection_struct *conn,
5469 struct smb_request *req,
5470 uint16_t root_dir_fid,
5471 const struct smb_filename *smb_fname,
5472 struct smb_filename **smb_fname_out)
5474 files_struct *dir_fsp;
5475 char *parent_fname = NULL;
5476 char *new_base_name = NULL;
5477 uint32_t ucf_flags = ucf_flags_from_smb_request(req);
5480 if (root_dir_fid == 0 || !smb_fname) {
5481 status = NT_STATUS_INTERNAL_ERROR;
5485 dir_fsp = file_fsp(req, root_dir_fid);
5487 if (dir_fsp == NULL) {
5488 status = NT_STATUS_INVALID_HANDLE;
5492 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
5493 status = NT_STATUS_INVALID_HANDLE;
5497 if (!dir_fsp->is_directory) {
5500 * Check to see if this is a mac fork of some kind.
5503 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
5504 is_ntfs_stream_smb_fname(smb_fname)) {
5505 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
5510 we need to handle the case when we get a
5511 relative open relative to a file and the
5512 pathname is blank - this is a reopen!
5513 (hint from demyn plantenberg)
5516 status = NT_STATUS_INVALID_HANDLE;
5520 if (ISDOT(dir_fsp->fsp_name->base_name)) {
5522 * We're at the toplevel dir, the final file name
5523 * must not contain ./, as this is filtered out
5524 * normally by srvstr_get_path and unix_convert
5525 * explicitly rejects paths containing ./.
5527 parent_fname = talloc_strdup(talloc_tos(), "");
5528 if (parent_fname == NULL) {
5529 status = NT_STATUS_NO_MEMORY;
5533 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
5536 * Copy in the base directory name.
5539 parent_fname = talloc_array(talloc_tos(), char,
5541 if (parent_fname == NULL) {
5542 status = NT_STATUS_NO_MEMORY;
5545 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
5549 * Ensure it ends in a '/'.
5550 * We used TALLOC_SIZE +2 to add space for the '/'.
5554 && (parent_fname[dir_name_len-1] != '\\')
5555 && (parent_fname[dir_name_len-1] != '/')) {
5556 parent_fname[dir_name_len] = '/';
5557 parent_fname[dir_name_len+1] = '\0';
5561 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
5562 smb_fname->base_name);
5563 if (new_base_name == NULL) {
5564 status = NT_STATUS_NO_MEMORY;
5568 status = filename_convert(req,
5575 if (!NT_STATUS_IS_OK(status)) {
5580 TALLOC_FREE(parent_fname);
5581 TALLOC_FREE(new_base_name);
5585 NTSTATUS create_file_default(connection_struct *conn,
5586 struct smb_request *req,
5587 uint16_t root_dir_fid,
5588 struct smb_filename *smb_fname,
5589 uint32_t access_mask,
5590 uint32_t share_access,
5591 uint32_t create_disposition,
5592 uint32_t create_options,
5593 uint32_t file_attributes,
5594 uint32_t oplock_request,
5595 struct smb2_lease *lease,
5596 uint64_t allocation_size,
5597 uint32_t private_flags,
5598 struct security_descriptor *sd,
5599 struct ea_list *ea_list,
5600 files_struct **result,
5602 const struct smb2_create_blobs *in_context_blobs,
5603 struct smb2_create_blobs *out_context_blobs)
5605 int info = FILE_WAS_OPENED;
5606 files_struct *fsp = NULL;
5608 bool stream_name = false;
5610 DBG_DEBUG("create_file: access_mask = 0x%x "
5611 "file_attributes = 0x%x, share_access = 0x%x, "
5612 "create_disposition = 0x%x create_options = 0x%x "
5613 "oplock_request = 0x%x "
5614 "private_flags = 0x%x "
5615 "root_dir_fid = 0x%x, ea_list = %p, sd = %p, "
5617 (unsigned int)access_mask,
5618 (unsigned int)file_attributes,
5619 (unsigned int)share_access,
5620 (unsigned int)create_disposition,
5621 (unsigned int)create_options,
5622 (unsigned int)oplock_request,
5623 (unsigned int)private_flags,
5624 (unsigned int)root_dir_fid,
5625 ea_list, sd, smb_fname_str_dbg(smb_fname));
5628 * Calculate the filename from the root_dir_if if necessary.
5631 if (root_dir_fid != 0) {
5632 struct smb_filename *smb_fname_out = NULL;
5633 status = get_relative_fid_filename(conn, req, root_dir_fid,
5634 smb_fname, &smb_fname_out);
5635 if (!NT_STATUS_IS_OK(status)) {
5638 smb_fname = smb_fname_out;
5642 * Check to see if this is a mac fork of some kind.
5645 stream_name = is_ntfs_stream_smb_fname(smb_fname);
5647 enum FAKE_FILE_TYPE fake_file_type;
5649 fake_file_type = is_fake_file(smb_fname);
5651 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
5654 * Here we go! support for changing the disk quotas
5657 * We need to fake up to open this MAGIC QUOTA file
5658 * and return a valid FID.
5660 * w2k close this file directly after openening xp
5661 * also tries a QUERY_FILE_INFO on the file and then
5664 status = open_fake_file(req, conn, req->vuid,
5665 fake_file_type, smb_fname,
5667 if (!NT_STATUS_IS_OK(status)) {
5671 ZERO_STRUCT(smb_fname->st);
5675 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
5676 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
5681 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
5683 smb_fname->stream_name = NULL;
5684 /* We have to handle this error here. */
5685 if (create_options & FILE_DIRECTORY_FILE) {
5686 status = NT_STATUS_NOT_A_DIRECTORY;
5689 if (req != NULL && req->posix_pathnames) {
5690 ret = SMB_VFS_LSTAT(conn, smb_fname);
5692 ret = SMB_VFS_STAT(conn, smb_fname);
5695 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
5696 status = NT_STATUS_FILE_IS_A_DIRECTORY;
5701 status = create_file_unixpath(
5702 conn, req, smb_fname, access_mask, share_access,
5703 create_disposition, create_options, file_attributes,
5704 oplock_request, lease, allocation_size, private_flags,
5708 if (!NT_STATUS_IS_OK(status)) {
5713 DEBUG(10, ("create_file: info=%d\n", info));
5716 if (pinfo != NULL) {
5719 return NT_STATUS_OK;
5722 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
5725 close_file(req, fsp, ERROR_CLOSE);