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 existing_unx_mode,
2534 mode_t new_unx_mode,
2535 mode_t *returned_unx_mode)
2537 uint32_t noarch_old_dos_attr, noarch_new_dos_attr;
2539 noarch_old_dos_attr = (old_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
2540 noarch_new_dos_attr = (new_dos_attr & ~FILE_ATTRIBUTE_ARCHIVE);
2542 if((noarch_old_dos_attr == 0 && noarch_new_dos_attr != 0) ||
2543 (noarch_old_dos_attr != 0 && ((noarch_old_dos_attr & noarch_new_dos_attr) == noarch_old_dos_attr))) {
2544 *returned_unx_mode = new_unx_mode;
2546 *returned_unx_mode = (mode_t)0;
2549 DEBUG(10,("open_match_attributes: old_dos_attr = 0x%x, "
2550 "existing_unx_mode = 0%o, new_dos_attr = 0x%x "
2551 "returned_unx_mode = 0%o\n",
2552 (unsigned int)old_dos_attr,
2553 (unsigned int)existing_unx_mode,
2554 (unsigned int)new_dos_attr,
2555 (unsigned int)*returned_unx_mode ));
2557 /* If we're mapping SYSTEM and HIDDEN ensure they match. */
2558 if (lp_map_system(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
2559 if ((old_dos_attr & FILE_ATTRIBUTE_SYSTEM) &&
2560 !(new_dos_attr & FILE_ATTRIBUTE_SYSTEM)) {
2564 if (lp_map_hidden(SNUM(conn)) || lp_store_dos_attributes(SNUM(conn))) {
2565 if ((old_dos_attr & FILE_ATTRIBUTE_HIDDEN) &&
2566 !(new_dos_attr & FILE_ATTRIBUTE_HIDDEN)) {
2573 /****************************************************************************
2574 Special FCB or DOS processing in the case of a sharing violation.
2575 Try and find a duplicated file handle.
2576 ****************************************************************************/
2578 static NTSTATUS fcb_or_dos_open(struct smb_request *req,
2579 connection_struct *conn,
2580 files_struct *fsp_to_dup_into,
2581 const struct smb_filename *smb_fname,
2585 uint32_t access_mask,
2586 uint32_t share_access,
2587 uint32_t create_options)
2591 DEBUG(5,("fcb_or_dos_open: attempting old open semantics for "
2592 "file %s.\n", smb_fname_str_dbg(smb_fname)));
2594 for(fsp = file_find_di_first(conn->sconn, id); fsp;
2595 fsp = file_find_di_next(fsp)) {
2597 DEBUG(10,("fcb_or_dos_open: checking file %s, fd = %d, "
2598 "vuid = %llu, file_pid = %u, private_options = 0x%x "
2599 "access_mask = 0x%x\n", fsp_str_dbg(fsp),
2600 fsp->fh->fd, (unsigned long long)fsp->vuid,
2601 (unsigned int)fsp->file_pid,
2602 (unsigned int)fsp->fh->private_options,
2603 (unsigned int)fsp->access_mask ));
2605 if (fsp != fsp_to_dup_into &&
2606 fsp->fh->fd != -1 &&
2607 fsp->vuid == vuid &&
2608 fsp->file_pid == file_pid &&
2609 (fsp->fh->private_options & (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS |
2610 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) &&
2611 (fsp->access_mask & FILE_WRITE_DATA) &&
2612 strequal(fsp->fsp_name->base_name, smb_fname->base_name) &&
2613 strequal(fsp->fsp_name->stream_name,
2614 smb_fname->stream_name)) {
2615 DEBUG(10,("fcb_or_dos_open: file match\n"));
2621 return NT_STATUS_NOT_FOUND;
2624 /* quite an insane set of semantics ... */
2625 if (is_executable(smb_fname->base_name) &&
2626 (fsp->fh->private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS)) {
2627 DEBUG(10,("fcb_or_dos_open: file fail due to is_executable.\n"));
2628 return NT_STATUS_INVALID_PARAMETER;
2631 /* We need to duplicate this fsp. */
2632 return dup_file_fsp(req, fsp, access_mask, share_access,
2633 create_options, fsp_to_dup_into);
2636 static void schedule_defer_open(struct share_mode_lock *lck,
2638 struct timeval request_time,
2639 struct smb_request *req)
2641 /* This is a relative time, added to the absolute
2642 request_time value to get the absolute timeout time.
2643 Note that if this is the second or greater time we enter
2644 this codepath for this particular request mid then
2645 request_time is left as the absolute time of the *first*
2646 time this request mid was processed. This is what allows
2647 the request to eventually time out. */
2649 struct timeval timeout;
2651 /* Normally the smbd we asked should respond within
2652 * OPLOCK_BREAK_TIMEOUT seconds regardless of whether
2653 * the client did, give twice the timeout as a safety
2654 * measure here in case the other smbd is stuck
2655 * somewhere else. */
2657 timeout = timeval_set(OPLOCK_BREAK_TIMEOUT*2, 0);
2659 if (request_timed_out(request_time, timeout)) {
2663 defer_open(lck, request_time, timeout, req, true, id);
2666 /****************************************************************************
2667 Reschedule an open call that went asynchronous.
2668 ****************************************************************************/
2670 static void schedule_async_open_timer(struct tevent_context *ev,
2671 struct tevent_timer *te,
2672 struct timeval current_time,
2675 exit_server("async open timeout");
2678 static void schedule_async_open(struct timeval request_time,
2679 struct smb_request *req)
2681 struct deferred_open_record *open_rec = NULL;
2682 struct timeval timeout = timeval_set(20, 0);
2685 if (request_timed_out(request_time, timeout)) {
2689 open_rec = deferred_open_record_create(false, true, (struct file_id){0});
2690 if (open_rec == NULL) {
2691 exit_server("deferred_open_record_create failed");
2694 ok = push_deferred_open_message_smb(req, request_time, timeout,
2695 (struct file_id){0}, open_rec);
2697 exit_server("push_deferred_open_message_smb failed");
2700 open_rec->te = tevent_add_timer(req->sconn->ev_ctx,
2702 timeval_current_ofs(20, 0),
2703 schedule_async_open_timer,
2705 if (open_rec->te == NULL) {
2706 exit_server("tevent_add_timer failed");
2710 /****************************************************************************
2711 Work out what access_mask to use from what the client sent us.
2712 ****************************************************************************/
2714 static NTSTATUS smbd_calculate_maximum_allowed_access(
2715 connection_struct *conn,
2716 const struct smb_filename *smb_fname,
2718 uint32_t *p_access_mask)
2720 struct security_descriptor *sd;
2721 uint32_t access_granted;
2724 if (!use_privs && (get_current_uid(conn) == (uid_t)0)) {
2725 *p_access_mask |= FILE_GENERIC_ALL;
2726 return NT_STATUS_OK;
2729 status = SMB_VFS_GET_NT_ACL(conn, smb_fname,
2735 if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
2737 * File did not exist
2739 *p_access_mask = FILE_GENERIC_ALL;
2740 return NT_STATUS_OK;
2742 if (!NT_STATUS_IS_OK(status)) {
2743 DEBUG(10,("Could not get acl on file %s: %s\n",
2744 smb_fname_str_dbg(smb_fname),
2745 nt_errstr(status)));
2746 return NT_STATUS_ACCESS_DENIED;
2750 * If we can access the path to this file, by
2751 * default we have FILE_READ_ATTRIBUTES from the
2752 * containing directory. See the section:
2753 * "Algorithm to Check Access to an Existing File"
2756 * se_file_access_check()
2757 * also takes care of owner WRITE_DAC and READ_CONTROL.
2759 status = se_file_access_check(sd,
2760 get_current_nttok(conn),
2762 (*p_access_mask & ~FILE_READ_ATTRIBUTES),
2767 if (!NT_STATUS_IS_OK(status)) {
2768 DEBUG(10, ("Access denied on file %s: "
2769 "when calculating maximum access\n",
2770 smb_fname_str_dbg(smb_fname)));
2771 return NT_STATUS_ACCESS_DENIED;
2773 *p_access_mask = (access_granted | FILE_READ_ATTRIBUTES);
2775 if (!(access_granted & DELETE_ACCESS)) {
2776 if (can_delete_file_in_directory(conn, smb_fname)) {
2777 *p_access_mask |= DELETE_ACCESS;
2781 return NT_STATUS_OK;
2784 NTSTATUS smbd_calculate_access_mask(connection_struct *conn,
2785 const struct smb_filename *smb_fname,
2787 uint32_t access_mask,
2788 uint32_t *access_mask_out)
2791 uint32_t orig_access_mask = access_mask;
2792 uint32_t rejected_share_access;
2794 if (access_mask & SEC_MASK_INVALID) {
2795 DBG_DEBUG("access_mask [%8x] contains invalid bits\n",
2797 return NT_STATUS_ACCESS_DENIED;
2801 * Convert GENERIC bits to specific bits.
2804 se_map_generic(&access_mask, &file_generic_mapping);
2806 /* Calculate MAXIMUM_ALLOWED_ACCESS if requested. */
2807 if (access_mask & MAXIMUM_ALLOWED_ACCESS) {
2809 status = smbd_calculate_maximum_allowed_access(
2810 conn, smb_fname, use_privs, &access_mask);
2812 if (!NT_STATUS_IS_OK(status)) {
2816 access_mask &= conn->share_access;
2819 rejected_share_access = access_mask & ~(conn->share_access);
2821 if (rejected_share_access) {
2822 DEBUG(10, ("smbd_calculate_access_mask: Access denied on "
2823 "file %s: rejected by share access mask[0x%08X] "
2824 "orig[0x%08X] mapped[0x%08X] reject[0x%08X]\n",
2825 smb_fname_str_dbg(smb_fname),
2827 orig_access_mask, access_mask,
2828 rejected_share_access));
2829 return NT_STATUS_ACCESS_DENIED;
2832 *access_mask_out = access_mask;
2833 return NT_STATUS_OK;
2836 /****************************************************************************
2837 Remove the deferred open entry under lock.
2838 ****************************************************************************/
2840 /****************************************************************************
2841 Return true if this is a state pointer to an asynchronous create.
2842 ****************************************************************************/
2844 bool is_deferred_open_async(const struct deferred_open_record *rec)
2846 return rec->async_open;
2849 static bool clear_ads(uint32_t create_disposition)
2853 switch (create_disposition) {
2854 case FILE_SUPERSEDE:
2855 case FILE_OVERWRITE_IF:
2856 case FILE_OVERWRITE:
2865 static int disposition_to_open_flags(uint32_t create_disposition)
2870 * Currently we're using FILE_SUPERSEDE as the same as
2871 * FILE_OVERWRITE_IF but they really are
2872 * different. FILE_SUPERSEDE deletes an existing file
2873 * (requiring delete access) then recreates it.
2876 switch (create_disposition) {
2877 case FILE_SUPERSEDE:
2878 case FILE_OVERWRITE_IF:
2880 * If file exists replace/overwrite. If file doesn't
2883 ret = O_CREAT|O_TRUNC;
2888 * If file exists open. If file doesn't exist error.
2893 case FILE_OVERWRITE:
2895 * If file exists overwrite. If file doesn't exist
2903 * If file exists error. If file doesn't exist create.
2905 ret = O_CREAT|O_EXCL;
2910 * If file exists open. If file doesn't exist create.
2918 static int calculate_open_access_flags(uint32_t access_mask,
2919 uint32_t private_flags)
2921 bool need_write, need_read;
2924 * Note that we ignore the append flag as append does not
2925 * mean the same thing under DOS and Unix.
2928 need_write = (access_mask & (FILE_WRITE_DATA | FILE_APPEND_DATA));
2933 /* DENY_DOS opens are always underlying read-write on the
2934 file handle, no matter what the requested access mask
2938 ((private_flags & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) ||
2939 access_mask & (FILE_READ_ATTRIBUTES|FILE_READ_DATA|
2940 FILE_READ_EA|FILE_EXECUTE));
2948 /****************************************************************************
2949 Open a file with a share mode. Passed in an already created files_struct *.
2950 ****************************************************************************/
2952 static NTSTATUS open_file_ntcreate(connection_struct *conn,
2953 struct smb_request *req,
2954 uint32_t access_mask, /* access bits (FILE_READ_DATA etc.) */
2955 uint32_t share_access, /* share constants (FILE_SHARE_READ etc) */
2956 uint32_t create_disposition, /* FILE_OPEN_IF etc. */
2957 uint32_t create_options, /* options such as delete on close. */
2958 uint32_t new_dos_attributes, /* attributes used for new file. */
2959 int oplock_request, /* internal Samba oplock codes. */
2960 struct smb2_lease *lease,
2961 /* Information (FILE_EXISTS etc.) */
2962 uint32_t private_flags, /* Samba specific flags. */
2966 struct smb_filename *smb_fname = fsp->fsp_name;
2969 bool file_existed = VALID_STAT(smb_fname->st);
2970 bool def_acl = False;
2971 bool posix_open = False;
2972 bool new_file_created = False;
2973 bool first_open_attempt = true;
2974 NTSTATUS fsp_open = NT_STATUS_ACCESS_DENIED;
2975 mode_t new_unx_mode = (mode_t)0;
2976 mode_t unx_mode = (mode_t)0;
2978 uint32_t existing_dos_attributes = 0;
2979 struct timeval request_time = timeval_zero();
2980 struct share_mode_lock *lck = NULL;
2981 uint32_t open_access_mask = access_mask;
2984 SMB_STRUCT_STAT saved_stat = smb_fname->st;
2985 struct timespec old_write_time;
2988 if (conn->printer) {
2990 * Printers are handled completely differently.
2991 * Most of the passed parameters are ignored.
2995 *pinfo = FILE_WAS_CREATED;
2998 DEBUG(10, ("open_file_ntcreate: printer open fname=%s\n",
2999 smb_fname_str_dbg(smb_fname)));
3002 DEBUG(0,("open_file_ntcreate: printer open without "
3003 "an SMB request!\n"));
3004 return NT_STATUS_INTERNAL_ERROR;
3007 return print_spool_open(fsp, smb_fname->base_name,
3011 if (!parent_dirname(talloc_tos(), smb_fname->base_name, &parent_dir,
3013 return NT_STATUS_NO_MEMORY;
3016 if (new_dos_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3018 unx_mode = (mode_t)(new_dos_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
3019 new_dos_attributes = 0;
3021 /* Windows allows a new file to be created and
3022 silently removes a FILE_ATTRIBUTE_DIRECTORY
3023 sent by the client. Do the same. */
3025 new_dos_attributes &= ~FILE_ATTRIBUTE_DIRECTORY;
3027 /* We add FILE_ATTRIBUTE_ARCHIVE to this as this mode is only used if the file is
3029 unx_mode = unix_mode(conn, new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
3030 smb_fname, parent_dir);
3033 DEBUG(10, ("open_file_ntcreate: fname=%s, dos_attrs=0x%x "
3034 "access_mask=0x%x share_access=0x%x "
3035 "create_disposition = 0x%x create_options=0x%x "
3036 "unix mode=0%o oplock_request=%d private_flags = 0x%x\n",
3037 smb_fname_str_dbg(smb_fname), new_dos_attributes,
3038 access_mask, share_access, create_disposition,
3039 create_options, (unsigned int)unx_mode, oplock_request,
3040 (unsigned int)private_flags));
3043 /* Ensure req == NULL means INTERNAL_OPEN_ONLY */
3044 SMB_ASSERT(((oplock_request & INTERNAL_OPEN_ONLY) != 0));
3046 /* And req != NULL means no INTERNAL_OPEN_ONLY */
3047 SMB_ASSERT(((oplock_request & INTERNAL_OPEN_ONLY) == 0));
3051 * Only non-internal opens can be deferred at all
3055 struct deferred_open_record *open_rec;
3056 if (get_deferred_open_message_state(req,
3059 /* Remember the absolute time of the original
3060 request with this mid. We'll use it later to
3061 see if this has timed out. */
3063 /* If it was an async create retry, the file
3066 if (is_deferred_open_async(open_rec)) {
3067 SET_STAT_INVALID(smb_fname->st);
3068 file_existed = false;
3071 /* Ensure we don't reprocess this message. */
3072 remove_deferred_open_message_smb(req->xconn, req->mid);
3074 first_open_attempt = false;
3079 new_dos_attributes &= SAMBA_ATTRIBUTES_MASK;
3082 * Only use strored DOS attributes for checks
3083 * against requested attributes (below via
3084 * open_match_attributes()), cf bug #11992
3085 * for details. -slow
3089 status = SMB_VFS_GET_DOS_ATTRIBUTES(conn, smb_fname, &attr);
3090 if (NT_STATUS_IS_OK(status)) {
3091 existing_dos_attributes = attr;
3096 /* ignore any oplock requests if oplocks are disabled */
3097 if (!lp_oplocks(SNUM(conn)) ||
3098 IS_VETO_OPLOCK_PATH(conn, smb_fname->base_name)) {
3099 /* Mask off everything except the private Samba bits. */
3100 oplock_request &= SAMBA_PRIVATE_OPLOCK_MASK;
3103 /* this is for OS/2 long file names - say we don't support them */
3104 if (req != NULL && !req->posix_pathnames &&
3105 strstr(smb_fname->base_name,".+,;=[].")) {
3106 /* OS/2 Workplace shell fix may be main code stream in a later
3108 DEBUG(5,("open_file_ntcreate: OS/2 long filenames are not "
3110 if (use_nt_status()) {
3111 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
3113 return NT_STATUS_DOS(ERRDOS, ERRcannotopen);
3116 switch( create_disposition ) {
3118 /* If file exists open. If file doesn't exist error. */
3119 if (!file_existed) {
3120 DEBUG(5,("open_file_ntcreate: FILE_OPEN "
3121 "requested for file %s and file "
3123 smb_fname_str_dbg(smb_fname)));
3125 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
3129 case FILE_OVERWRITE:
3130 /* If file exists overwrite. If file doesn't exist
3132 if (!file_existed) {
3133 DEBUG(5,("open_file_ntcreate: FILE_OVERWRITE "
3134 "requested for file %s and file "
3136 smb_fname_str_dbg(smb_fname) ));
3138 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
3143 /* If file exists error. If file doesn't exist
3146 DEBUG(5,("open_file_ntcreate: FILE_CREATE "
3147 "requested for file %s and file "
3148 "already exists.\n",
3149 smb_fname_str_dbg(smb_fname)));
3150 if (S_ISDIR(smb_fname->st.st_ex_mode)) {
3155 return map_nt_error_from_unix(errno);
3159 case FILE_SUPERSEDE:
3160 case FILE_OVERWRITE_IF:
3164 return NT_STATUS_INVALID_PARAMETER;
3167 flags2 = disposition_to_open_flags(create_disposition);
3169 /* We only care about matching attributes on file exists and
3172 if (!posix_open && file_existed &&
3173 ((create_disposition == FILE_OVERWRITE) ||
3174 (create_disposition == FILE_OVERWRITE_IF))) {
3175 if (!open_match_attributes(conn, existing_dos_attributes,
3177 smb_fname->st.st_ex_mode,
3178 unx_mode, &new_unx_mode)) {
3179 DEBUG(5,("open_file_ntcreate: attributes mismatch "
3180 "for file %s (%x %x) (0%o, 0%o)\n",
3181 smb_fname_str_dbg(smb_fname),
3182 existing_dos_attributes,
3184 (unsigned int)smb_fname->st.st_ex_mode,
3185 (unsigned int)unx_mode ));
3187 return NT_STATUS_ACCESS_DENIED;
3191 status = smbd_calculate_access_mask(conn, smb_fname,
3195 if (!NT_STATUS_IS_OK(status)) {
3196 DEBUG(10, ("open_file_ntcreate: smbd_calculate_access_mask "
3197 "on file %s returned %s\n",
3198 smb_fname_str_dbg(smb_fname), nt_errstr(status)));
3202 open_access_mask = access_mask;
3204 if (flags2 & O_TRUNC) {
3205 open_access_mask |= FILE_WRITE_DATA; /* This will cause oplock breaks. */
3208 DEBUG(10, ("open_file_ntcreate: fname=%s, after mapping "
3209 "access_mask=0x%x\n", smb_fname_str_dbg(smb_fname),
3213 * Note that we ignore the append flag as append does not
3214 * mean the same thing under DOS and Unix.
3217 flags = calculate_open_access_flags(access_mask, private_flags);
3220 * Currently we only look at FILE_WRITE_THROUGH for create options.
3224 if ((create_options & FILE_WRITE_THROUGH) && lp_strict_sync(SNUM(conn))) {
3229 if (posix_open && (access_mask & FILE_APPEND_DATA)) {
3233 if (!posix_open && !CAN_WRITE(conn)) {
3235 * We should really return a permission denied error if either
3236 * O_CREAT or O_TRUNC are set, but for compatibility with
3237 * older versions of Samba we just AND them out.
3239 flags2 &= ~(O_CREAT|O_TRUNC);
3242 if (lp_kernel_oplocks(SNUM(conn))) {
3244 * With kernel oplocks the open breaking an oplock
3245 * blocks until the oplock holder has given up the
3246 * oplock or closed the file. We prevent this by always
3247 * trying to open the file with O_NONBLOCK (see "man
3250 * If a process that doesn't use the smbd open files
3251 * database or communication methods holds a kernel
3252 * oplock we must periodically poll for available open
3255 flags2 |= O_NONBLOCK;
3259 * Ensure we can't write on a read-only share or file.
3262 if (flags != O_RDONLY && file_existed &&
3263 (!CAN_WRITE(conn) || IS_DOS_READONLY(existing_dos_attributes))) {
3264 DEBUG(5,("open_file_ntcreate: write access requested for "
3265 "file %s on read only %s\n",
3266 smb_fname_str_dbg(smb_fname),
3267 !CAN_WRITE(conn) ? "share" : "file" ));
3269 return NT_STATUS_ACCESS_DENIED;
3272 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_fname->st);
3273 fsp->share_access = share_access;
3274 fsp->fh->private_options = private_flags;
3275 fsp->access_mask = open_access_mask; /* We change this to the
3276 * requested access_mask after
3277 * the open is done. */
3279 fsp->posix_flags |= FSP_POSIX_FLAGS_ALL;
3282 if (timeval_is_zero(&request_time)) {
3283 request_time = fsp->open_time;
3287 * Ensure we pay attention to default ACLs on directories if required.
3290 if ((flags2 & O_CREAT) && lp_inherit_acls(SNUM(conn)) &&
3291 (def_acl = directory_has_default_acl(conn, parent_dir))) {
3292 unx_mode = (0777 & lp_create_mask(SNUM(conn)));
3295 DEBUG(4,("calling open_file with flags=0x%X flags2=0x%X mode=0%o, "
3296 "access_mask = 0x%x, open_access_mask = 0x%x\n",
3297 (unsigned int)flags, (unsigned int)flags2,
3298 (unsigned int)unx_mode, (unsigned int)access_mask,
3299 (unsigned int)open_access_mask));
3301 fsp_open = open_file(fsp, conn, req, parent_dir,
3302 flags|flags2, unx_mode, access_mask,
3303 open_access_mask, &new_file_created);
3305 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_NETWORK_BUSY)) {
3309 * This handles the kernel oplock case:
3311 * the file has an active kernel oplock and the open() returned
3312 * EWOULDBLOCK/EAGAIN which maps to NETWORK_BUSY.
3314 * "Samba locking.tdb oplocks" are handled below after acquiring
3315 * the sharemode lock with get_share_mode_lock().
3317 if (file_existed && S_ISFIFO(fsp->fsp_name->st.st_ex_mode)) {
3318 DEBUG(10, ("FIFO busy\n"));
3319 return NT_STATUS_NETWORK_BUSY;
3322 DEBUG(10, ("Internal open busy\n"));
3323 return NT_STATUS_NETWORK_BUSY;
3327 * From here on we assume this is an oplock break triggered
3330 lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
3333 * No oplock from Samba around. Set up a poll every 1
3334 * second to retry a non-blocking open until the time
3337 setup_kernel_oplock_poll_open(request_time,
3340 DBG_DEBUG("No Samba oplock around after EWOULDBLOCK. "
3341 "Retrying with poll\n");
3342 return NT_STATUS_SHARING_VIOLATION;
3345 if (!validate_oplock_types(lck)) {
3346 smb_panic("validate_oplock_types failed");
3349 delay = delay_for_oplock(fsp, 0, lease, lck, false,
3351 first_open_attempt);
3353 schedule_defer_open(lck, fsp->file_id, request_time,
3356 DEBUG(10, ("Sent oplock break request to kernel "
3357 "oplock holder\n"));
3358 return NT_STATUS_SHARING_VIOLATION;
3362 * No oplock from Samba around. Set up a poll every 1
3363 * second to retry a non-blocking open until the time
3366 setup_kernel_oplock_poll_open(request_time, req, fsp->file_id);
3369 DBG_DEBUG("No Samba oplock around after EWOULDBLOCK. "
3370 "Retrying with poll\n");
3371 return NT_STATUS_SHARING_VIOLATION;
3374 if (!NT_STATUS_IS_OK(fsp_open)) {
3375 if (NT_STATUS_EQUAL(fsp_open, NT_STATUS_RETRY)) {
3376 schedule_async_open(request_time, req);
3381 if (new_file_created) {
3383 * As we atomically create using O_CREAT|O_EXCL,
3384 * then if new_file_created is true, then
3385 * file_existed *MUST* have been false (even
3386 * if the file was previously detected as being
3389 file_existed = false;
3392 if (file_existed && !check_same_dev_ino(&saved_stat, &smb_fname->st)) {
3394 * The file did exist, but some other (local or NFS)
3395 * process either renamed/unlinked and re-created the
3396 * file with different dev/ino after we walked the path,
3397 * but before we did the open. We could retry the
3398 * open but it's a rare enough case it's easier to
3399 * just fail the open to prevent creating any problems
3400 * in the open file db having the wrong dev/ino key.
3403 DEBUG(1,("open_file_ntcreate: file %s - dev/ino mismatch. "
3404 "Old (dev=0x%llu, ino =0x%llu). "
3405 "New (dev=0x%llu, ino=0x%llu). Failing open "
3406 " with NT_STATUS_ACCESS_DENIED.\n",
3407 smb_fname_str_dbg(smb_fname),
3408 (unsigned long long)saved_stat.st_ex_dev,
3409 (unsigned long long)saved_stat.st_ex_ino,
3410 (unsigned long long)smb_fname->st.st_ex_dev,
3411 (unsigned long long)smb_fname->st.st_ex_ino));
3412 return NT_STATUS_ACCESS_DENIED;
3415 old_write_time = smb_fname->st.st_ex_mtime;
3418 * Deal with the race condition where two smbd's detect the
3419 * file doesn't exist and do the create at the same time. One
3420 * of them will win and set a share mode, the other (ie. this
3421 * one) should check if the requested share mode for this
3422 * create is allowed.
3426 * Now the file exists and fsp is successfully opened,
3427 * fsp->dev and fsp->inode are valid and should replace the
3428 * dev=0,inode=0 from a non existent file. Spotted by
3429 * Nadav Danieli <nadavd@exanet.com>. JRA.
3434 lck = get_share_mode_lock(talloc_tos(), id,
3436 smb_fname, &old_write_time);
3439 DEBUG(0, ("open_file_ntcreate: Could not get share "
3440 "mode lock for %s\n",
3441 smb_fname_str_dbg(smb_fname)));
3443 return NT_STATUS_SHARING_VIOLATION;
3446 /* Get the types we need to examine. */
3447 if (!validate_oplock_types(lck)) {
3448 smb_panic("validate_oplock_types failed");
3451 if (has_delete_on_close(lck, fsp->name_hash)) {
3454 return NT_STATUS_DELETE_PENDING;
3457 status = open_mode_check(conn, lck,
3458 access_mask, share_access);
3460 if (NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION) ||
3461 (lck->data->num_share_modes > 0)) {
3463 * This comes from ancient times out of open_mode_check. I
3464 * have no clue whether this is still necessary. I can't think
3465 * of a case where this would actually matter further down in
3466 * this function. I leave it here for further investigation
3469 file_existed = true;
3474 * Handle oplocks, deferring the request if delay_for_oplock()
3475 * triggered a break message and we have to wait for the break
3479 bool sharing_violation = NT_STATUS_EQUAL(
3480 status, NT_STATUS_SHARING_VIOLATION);
3482 delay = delay_for_oplock(fsp, oplock_request, lease, lck,
3485 first_open_attempt);
3487 schedule_defer_open(lck, fsp->file_id,
3491 return NT_STATUS_SHARING_VIOLATION;
3495 if (!NT_STATUS_IS_OK(status)) {
3496 uint32_t can_access_mask;
3497 bool can_access = True;
3499 SMB_ASSERT(NT_STATUS_EQUAL(status, NT_STATUS_SHARING_VIOLATION));
3501 /* Check if this can be done with the deny_dos and fcb
3504 (NTCREATEX_OPTIONS_PRIVATE_DENY_DOS|
3505 NTCREATEX_OPTIONS_PRIVATE_DENY_FCB)) {
3507 DEBUG(0, ("DOS open without an SMB "
3511 return NT_STATUS_INTERNAL_ERROR;
3514 /* Use the client requested access mask here,
3515 * not the one we open with. */
3516 status = fcb_or_dos_open(req,
3527 if (NT_STATUS_IS_OK(status)) {
3530 *pinfo = FILE_WAS_OPENED;
3532 return NT_STATUS_OK;
3537 * This next line is a subtlety we need for
3538 * MS-Access. If a file open will fail due to share
3539 * permissions and also for security (access) reasons,
3540 * we need to return the access failed error, not the
3541 * share error. We can't open the file due to kernel
3542 * oplock deadlock (it's possible we failed above on
3543 * the open_mode_check()) so use a userspace check.
3546 if (flags & O_RDWR) {
3547 can_access_mask = FILE_READ_DATA|FILE_WRITE_DATA;
3548 } else if (flags & O_WRONLY) {
3549 can_access_mask = FILE_WRITE_DATA;
3551 can_access_mask = FILE_READ_DATA;
3554 if (((can_access_mask & FILE_WRITE_DATA) &&
3555 !CAN_WRITE(conn)) ||
3556 !NT_STATUS_IS_OK(smbd_check_access_rights(conn,
3559 can_access_mask))) {
3564 * If we're returning a share violation, ensure we
3565 * cope with the braindead 1 second delay (SMB1 only).
3568 if (!(oplock_request & INTERNAL_OPEN_ONLY) &&
3569 !conn->sconn->using_smb2 &&
3570 lp_defer_sharing_violations()) {
3571 struct timeval timeout;
3574 /* this is a hack to speed up torture tests
3576 timeout_usecs = lp_parm_int(SNUM(conn),
3577 "smbd","sharedelay",
3578 SHARING_VIOLATION_USEC_WAIT);
3580 /* This is a relative time, added to the absolute
3581 request_time value to get the absolute timeout time.
3582 Note that if this is the second or greater time we enter
3583 this codepath for this particular request mid then
3584 request_time is left as the absolute time of the *first*
3585 time this request mid was processed. This is what allows
3586 the request to eventually time out. */
3588 timeout = timeval_set(0, timeout_usecs);
3590 if (!request_timed_out(request_time, timeout)) {
3591 defer_open(lck, request_time, timeout, req,
3600 * We have detected a sharing violation here
3601 * so return the correct error code
3603 status = NT_STATUS_SHARING_VIOLATION;
3605 status = NT_STATUS_ACCESS_DENIED;
3610 /* Should we atomically (to the client at least) truncate ? */
3611 if ((!new_file_created) &&
3612 (flags2 & O_TRUNC) &&
3613 (!S_ISFIFO(fsp->fsp_name->st.st_ex_mode))) {
3616 ret = vfs_set_filelen(fsp, 0);
3618 status = map_nt_error_from_unix(errno);
3626 * We have the share entry *locked*.....
3629 /* Delete streams if create_disposition requires it */
3630 if (!new_file_created && clear_ads(create_disposition) &&
3631 !is_ntfs_stream_smb_fname(smb_fname)) {
3632 status = delete_all_streams(conn, smb_fname);
3633 if (!NT_STATUS_IS_OK(status)) {
3640 /* note that we ignore failure for the following. It is
3641 basically a hack for NFS, and NFS will never set one of
3642 these only read them. Nobody but Samba can ever set a deny
3643 mode and we have already checked our more authoritative
3644 locking database for permission to set this deny mode. If
3645 the kernel refuses the operations then the kernel is wrong.
3646 note that GPFS supports it as well - jmcd */
3648 if (fsp->fh->fd != -1 && lp_kernel_share_modes(SNUM(conn))) {
3651 * Beware: streams implementing VFS modules may
3652 * implement streams in a way that fsp will have the
3653 * basefile open in the fsp fd, so lacking a distinct
3654 * fd for the stream kernel_flock will apply on the
3655 * basefile which is wrong. The actual check is
3656 * deffered to the VFS module implementing the
3657 * kernel_flock call.
3659 ret_flock = SMB_VFS_KERNEL_FLOCK(fsp, share_access, access_mask);
3660 if(ret_flock == -1 ){
3665 return NT_STATUS_SHARING_VIOLATION;
3668 fsp->kernel_share_modes_taken = true;
3672 * At this point onwards, we can guarantee that the share entry
3673 * is locked, whether we created the file or not, and that the
3674 * deny mode is compatible with all current opens.
3678 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
3679 * but we don't have to store this - just ignore it on access check.
3681 if (conn->sconn->using_smb2) {
3683 * SMB2 doesn't return it (according to Microsoft tests).
3684 * Test Case: TestSuite_ScenarioNo009GrantedAccessTestS0
3685 * File created with access = 0x7 (Read, Write, Delete)
3686 * Query Info on file returns 0x87 (Read, Write, Delete, Read Attributes)
3688 fsp->access_mask = access_mask;
3690 /* But SMB1 does. */
3691 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
3696 * stat opens on existing files don't get oplocks.
3697 * They can get leases.
3699 * Note that we check for stat open on the *open_access_mask*,
3700 * i.e. the access mask we actually used to do the open,
3701 * not the one the client asked for (which is in
3702 * fsp->access_mask). This is due to the fact that
3703 * FILE_OVERWRITE and FILE_OVERWRITE_IF add in O_TRUNC,
3704 * which adds FILE_WRITE_DATA to open_access_mask.
3706 if (is_stat_open(open_access_mask) && lease == NULL) {
3707 oplock_request = NO_OPLOCK;
3711 if (new_file_created) {
3712 info = FILE_WAS_CREATED;
3714 if (flags2 & O_TRUNC) {
3715 info = FILE_WAS_OVERWRITTEN;
3717 info = FILE_WAS_OPENED;
3726 * Setup the oplock info in both the shared memory and
3729 status = grant_fsp_oplock_type(req, fsp, lck, oplock_request, lease);
3730 if (!NT_STATUS_IS_OK(status)) {
3736 /* Handle strange delete on close create semantics. */
3737 if (create_options & FILE_DELETE_ON_CLOSE) {
3739 status = can_set_delete_on_close(fsp, new_dos_attributes);
3741 if (!NT_STATUS_IS_OK(status)) {
3742 /* Remember to delete the mode we just added. */
3743 del_share_mode(lck, fsp);
3748 /* Note that here we set the *inital* delete on close flag,
3749 not the regular one. The magic gets handled in close. */
3750 fsp->initial_delete_on_close = True;
3753 if (info != FILE_WAS_OPENED) {
3754 /* Overwritten files should be initially set as archive */
3755 if ((info == FILE_WAS_OVERWRITTEN && lp_map_archive(SNUM(conn))) ||
3756 lp_store_dos_attributes(SNUM(conn))) {
3758 if (file_set_dosmode(conn, smb_fname,
3759 new_dos_attributes | FILE_ATTRIBUTE_ARCHIVE,
3760 parent_dir, true) == 0) {
3761 unx_mode = smb_fname->st.st_ex_mode;
3767 /* Determine sparse flag. */
3769 /* POSIX opens are sparse by default. */
3770 fsp->is_sparse = true;
3772 fsp->is_sparse = (file_existed &&
3773 (existing_dos_attributes & FILE_ATTRIBUTE_SPARSE));
3777 * Take care of inherited ACLs on created files - if default ACL not
3781 if (!posix_open && new_file_created && !def_acl) {
3783 int saved_errno = errno; /* We might get ENOSYS in the next
3786 if (SMB_VFS_FCHMOD_ACL(fsp, unx_mode) == -1 &&
3788 errno = saved_errno; /* Ignore ENOSYS */
3791 } else if (new_unx_mode) {
3795 /* Attributes need changing. File already existed. */
3798 int saved_errno = errno; /* We might get ENOSYS in the
3800 ret = SMB_VFS_FCHMOD_ACL(fsp, new_unx_mode);
3802 if (ret == -1 && errno == ENOSYS) {
3803 errno = saved_errno; /* Ignore ENOSYS */
3805 DEBUG(5, ("open_file_ntcreate: reset "
3806 "attributes of file %s to 0%o\n",
3807 smb_fname_str_dbg(smb_fname),
3808 (unsigned int)new_unx_mode));
3809 ret = 0; /* Don't do the fchmod below. */
3814 (SMB_VFS_FCHMOD(fsp, new_unx_mode) == -1))
3815 DEBUG(5, ("open_file_ntcreate: failed to reset "
3816 "attributes of file %s to 0%o\n",
3817 smb_fname_str_dbg(smb_fname),
3818 (unsigned int)new_unx_mode));
3823 * Deal with other opens having a modified write time.
3825 struct timespec write_time = get_share_mode_write_time(lck);
3827 if (!null_timespec(write_time)) {
3828 update_stat_ex_mtime(&fsp->fsp_name->st, write_time);
3834 return NT_STATUS_OK;
3837 static NTSTATUS mkdir_internal(connection_struct *conn,
3838 struct smb_filename *smb_dname,
3839 uint32_t file_attributes)
3842 char *parent_dir = NULL;
3844 bool posix_open = false;
3845 bool need_re_stat = false;
3846 uint32_t access_mask = SEC_DIR_ADD_SUBDIR;
3848 if (!CAN_WRITE(conn) || (access_mask & ~(conn->share_access))) {
3849 DEBUG(5,("mkdir_internal: failing share access "
3850 "%s\n", lp_servicename(talloc_tos(), SNUM(conn))));
3851 return NT_STATUS_ACCESS_DENIED;
3854 if (!parent_dirname(talloc_tos(), smb_dname->base_name, &parent_dir,
3856 return NT_STATUS_NO_MEMORY;
3859 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
3861 mode = (mode_t)(file_attributes & ~FILE_FLAG_POSIX_SEMANTICS);
3863 mode = unix_mode(conn, FILE_ATTRIBUTE_DIRECTORY, smb_dname, parent_dir);
3866 status = check_parent_access(conn,
3869 if(!NT_STATUS_IS_OK(status)) {
3870 DEBUG(5,("mkdir_internal: check_parent_access "
3871 "on directory %s for path %s returned %s\n",
3873 smb_dname->base_name,
3874 nt_errstr(status) ));
3878 if (SMB_VFS_MKDIR(conn, smb_dname, mode) != 0) {
3879 return map_nt_error_from_unix(errno);
3882 /* Ensure we're checking for a symlink here.... */
3883 /* We don't want to get caught by a symlink racer. */
3885 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
3886 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
3887 smb_fname_str_dbg(smb_dname), strerror(errno)));
3888 return map_nt_error_from_unix(errno);
3891 if (!S_ISDIR(smb_dname->st.st_ex_mode)) {
3892 DEBUG(0, ("Directory '%s' just created is not a directory !\n",
3893 smb_fname_str_dbg(smb_dname)));
3894 return NT_STATUS_NOT_A_DIRECTORY;
3897 if (lp_store_dos_attributes(SNUM(conn))) {
3899 file_set_dosmode(conn, smb_dname,
3900 file_attributes | FILE_ATTRIBUTE_DIRECTORY,
3905 if (lp_inherit_permissions(SNUM(conn))) {
3906 inherit_access_posix_acl(conn, parent_dir,
3908 need_re_stat = true;
3913 * Check if high bits should have been set,
3914 * then (if bits are missing): add them.
3915 * Consider bits automagically set by UNIX, i.e. SGID bit from parent
3918 if ((mode & ~(S_IRWXU|S_IRWXG|S_IRWXO)) &&
3919 (mode & ~smb_dname->st.st_ex_mode)) {
3920 SMB_VFS_CHMOD(conn, smb_dname,
3921 (smb_dname->st.st_ex_mode |
3922 (mode & ~smb_dname->st.st_ex_mode)));
3923 need_re_stat = true;
3927 /* Change the owner if required. */
3928 if (lp_inherit_owner(SNUM(conn)) != INHERIT_OWNER_NO) {
3929 change_dir_owner_to_parent(conn, parent_dir,
3932 need_re_stat = true;
3936 if (SMB_VFS_LSTAT(conn, smb_dname) == -1) {
3937 DEBUG(2, ("Could not stat directory '%s' just created: %s\n",
3938 smb_fname_str_dbg(smb_dname), strerror(errno)));
3939 return map_nt_error_from_unix(errno);
3943 notify_fname(conn, NOTIFY_ACTION_ADDED, FILE_NOTIFY_CHANGE_DIR_NAME,
3944 smb_dname->base_name);
3946 return NT_STATUS_OK;
3949 /****************************************************************************
3950 Open a directory from an NT SMB call.
3951 ****************************************************************************/
3953 static NTSTATUS open_directory(connection_struct *conn,
3954 struct smb_request *req,
3955 struct smb_filename *smb_dname,
3956 uint32_t access_mask,
3957 uint32_t share_access,
3958 uint32_t create_disposition,
3959 uint32_t create_options,
3960 uint32_t file_attributes,
3962 files_struct **result)
3964 files_struct *fsp = NULL;
3965 bool dir_existed = VALID_STAT(smb_dname->st) ? True : False;
3966 struct share_mode_lock *lck = NULL;
3968 struct timespec mtimespec;
3972 if (is_ntfs_stream_smb_fname(smb_dname)) {
3973 DEBUG(2, ("open_directory: %s is a stream name!\n",
3974 smb_fname_str_dbg(smb_dname)));
3975 return NT_STATUS_NOT_A_DIRECTORY;
3978 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS)) {
3979 /* Ensure we have a directory attribute. */
3980 file_attributes |= FILE_ATTRIBUTE_DIRECTORY;
3983 DEBUG(5,("open_directory: opening directory %s, access_mask = 0x%x, "
3984 "share_access = 0x%x create_options = 0x%x, "
3985 "create_disposition = 0x%x, file_attributes = 0x%x\n",
3986 smb_fname_str_dbg(smb_dname),
3987 (unsigned int)access_mask,
3988 (unsigned int)share_access,
3989 (unsigned int)create_options,
3990 (unsigned int)create_disposition,
3991 (unsigned int)file_attributes));
3993 status = smbd_calculate_access_mask(conn, smb_dname, false,
3994 access_mask, &access_mask);
3995 if (!NT_STATUS_IS_OK(status)) {
3996 DEBUG(10, ("open_directory: smbd_calculate_access_mask "
3997 "on file %s returned %s\n",
3998 smb_fname_str_dbg(smb_dname),
3999 nt_errstr(status)));
4003 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
4004 !security_token_has_privilege(get_current_nttok(conn),
4005 SEC_PRIV_SECURITY)) {
4006 DEBUG(10, ("open_directory: open on %s "
4007 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
4008 smb_fname_str_dbg(smb_dname)));
4009 return NT_STATUS_PRIVILEGE_NOT_HELD;
4012 switch( create_disposition ) {
4016 return NT_STATUS_OBJECT_NAME_NOT_FOUND;
4019 info = FILE_WAS_OPENED;
4024 /* If directory exists error. If directory doesn't
4028 status = NT_STATUS_OBJECT_NAME_COLLISION;
4029 DEBUG(2, ("open_directory: unable to create "
4030 "%s. Error was %s\n",
4031 smb_fname_str_dbg(smb_dname),
4032 nt_errstr(status)));
4036 status = mkdir_internal(conn, smb_dname,
4039 if (!NT_STATUS_IS_OK(status)) {
4040 DEBUG(2, ("open_directory: unable to create "
4041 "%s. Error was %s\n",
4042 smb_fname_str_dbg(smb_dname),
4043 nt_errstr(status)));
4047 info = FILE_WAS_CREATED;
4052 * If directory exists open. If directory doesn't
4057 status = NT_STATUS_OK;
4058 info = FILE_WAS_OPENED;
4060 status = mkdir_internal(conn, smb_dname,
4063 if (NT_STATUS_IS_OK(status)) {
4064 info = FILE_WAS_CREATED;
4066 /* Cope with create race. */
4067 if (!NT_STATUS_EQUAL(status,
4068 NT_STATUS_OBJECT_NAME_COLLISION)) {
4069 DEBUG(2, ("open_directory: unable to create "
4070 "%s. Error was %s\n",
4071 smb_fname_str_dbg(smb_dname),
4072 nt_errstr(status)));
4077 * If mkdir_internal() returned
4078 * NT_STATUS_OBJECT_NAME_COLLISION
4079 * we still must lstat the path.
4082 if (SMB_VFS_LSTAT(conn, smb_dname)
4084 DEBUG(2, ("Could not stat "
4085 "directory '%s' just "
4090 return map_nt_error_from_unix(
4094 info = FILE_WAS_OPENED;
4100 case FILE_SUPERSEDE:
4101 case FILE_OVERWRITE:
4102 case FILE_OVERWRITE_IF:
4104 DEBUG(5,("open_directory: invalid create_disposition "
4105 "0x%x for directory %s\n",
4106 (unsigned int)create_disposition,
4107 smb_fname_str_dbg(smb_dname)));
4108 return NT_STATUS_INVALID_PARAMETER;
4111 if(!S_ISDIR(smb_dname->st.st_ex_mode)) {
4112 DEBUG(5,("open_directory: %s is not a directory !\n",
4113 smb_fname_str_dbg(smb_dname)));
4114 return NT_STATUS_NOT_A_DIRECTORY;
4117 if (info == FILE_WAS_OPENED) {
4118 status = smbd_check_access_rights(conn,
4122 if (!NT_STATUS_IS_OK(status)) {
4123 DEBUG(10, ("open_directory: smbd_check_access_rights on "
4124 "file %s failed with %s\n",
4125 smb_fname_str_dbg(smb_dname),
4126 nt_errstr(status)));
4131 status = file_new(req, conn, &fsp);
4132 if(!NT_STATUS_IS_OK(status)) {
4137 * Setup the files_struct for it.
4140 fsp->file_id = vfs_file_id_from_sbuf(conn, &smb_dname->st);
4141 fsp->vuid = req ? req->vuid : UID_FIELD_INVALID;
4142 fsp->file_pid = req ? req->smbpid : 0;
4143 fsp->can_lock = False;
4144 fsp->can_read = False;
4145 fsp->can_write = False;
4147 fsp->share_access = share_access;
4148 fsp->fh->private_options = 0;
4150 * According to Samba4, SEC_FILE_READ_ATTRIBUTE is always granted,
4152 fsp->access_mask = access_mask | FILE_READ_ATTRIBUTES;
4153 fsp->print_file = NULL;
4154 fsp->modified = False;
4155 fsp->oplock_type = NO_OPLOCK;
4156 fsp->sent_oplock_break = NO_BREAK_SENT;
4157 fsp->is_directory = True;
4158 if (file_attributes & FILE_FLAG_POSIX_SEMANTICS) {
4159 fsp->posix_flags |= FSP_POSIX_FLAGS_ALL;
4161 status = fsp_set_smb_fname(fsp, smb_dname);
4162 if (!NT_STATUS_IS_OK(status)) {
4163 file_free(req, fsp);
4167 /* Don't store old timestamps for directory
4168 handles in the internal database. We don't
4169 update them in there if new objects
4170 are creaded in the directory. Currently
4171 we only update timestamps on file writes.
4174 ZERO_STRUCT(mtimespec);
4176 if (access_mask & (FILE_LIST_DIRECTORY|
4178 FILE_ADD_SUBDIRECTORY|
4181 FILE_DELETE_CHILD)) {
4183 status = fd_open(conn, fsp, O_RDONLY|O_DIRECTORY, 0);
4185 /* POSIX allows us to open a directory with O_RDONLY. */
4186 status = fd_open(conn, fsp, O_RDONLY, 0);
4188 if (!NT_STATUS_IS_OK(status)) {
4189 DEBUG(5, ("open_directory: Could not open fd for "
4191 smb_fname_str_dbg(smb_dname),
4192 nt_errstr(status)));
4193 file_free(req, fsp);
4198 DEBUG(10, ("Not opening Directory %s\n",
4199 smb_fname_str_dbg(smb_dname)));
4202 status = vfs_stat_fsp(fsp);
4203 if (!NT_STATUS_IS_OK(status)) {
4205 file_free(req, fsp);
4209 if(!S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
4210 DEBUG(5,("open_directory: %s is not a directory !\n",
4211 smb_fname_str_dbg(smb_dname)));
4213 file_free(req, fsp);
4214 return NT_STATUS_NOT_A_DIRECTORY;
4217 /* Ensure there was no race condition. We need to check
4218 * dev/inode but not permissions, as these can change
4220 if (!check_same_dev_ino(&smb_dname->st, &fsp->fsp_name->st)) {
4221 DEBUG(5,("open_directory: stat struct differs for "
4223 smb_fname_str_dbg(smb_dname)));
4225 file_free(req, fsp);
4226 return NT_STATUS_ACCESS_DENIED;
4229 lck = get_share_mode_lock(talloc_tos(), fsp->file_id,
4230 conn->connectpath, smb_dname,
4234 DEBUG(0, ("open_directory: Could not get share mode lock for "
4235 "%s\n", smb_fname_str_dbg(smb_dname)));
4237 file_free(req, fsp);
4238 return NT_STATUS_SHARING_VIOLATION;
4241 if (has_delete_on_close(lck, fsp->name_hash)) {
4244 file_free(req, fsp);
4245 return NT_STATUS_DELETE_PENDING;
4248 status = open_mode_check(conn, lck,
4249 access_mask, share_access);
4251 if (!NT_STATUS_IS_OK(status)) {
4254 file_free(req, fsp);
4258 ok = set_share_mode(lck, fsp, get_current_uid(conn),
4259 req ? req->mid : 0, NO_OPLOCK,
4264 file_free(req, fsp);
4265 return NT_STATUS_NO_MEMORY;
4268 /* For directories the delete on close bit at open time seems
4269 always to be honored on close... See test 19 in Samba4 BASE-DELETE. */
4270 if (create_options & FILE_DELETE_ON_CLOSE) {
4271 status = can_set_delete_on_close(fsp, 0);
4272 if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status, NT_STATUS_DIRECTORY_NOT_EMPTY)) {
4273 del_share_mode(lck, fsp);
4276 file_free(req, fsp);
4280 if (NT_STATUS_IS_OK(status)) {
4281 /* Note that here we set the *inital* delete on close flag,
4282 not the regular one. The magic gets handled in close. */
4283 fsp->initial_delete_on_close = True;
4289 * Deal with other opens having a modified write time. Is this
4290 * possible for directories?
4292 struct timespec write_time = get_share_mode_write_time(lck);
4294 if (!null_timespec(write_time)) {
4295 update_stat_ex_mtime(&fsp->fsp_name->st, write_time);
4306 return NT_STATUS_OK;
4309 NTSTATUS create_directory(connection_struct *conn, struct smb_request *req,
4310 struct smb_filename *smb_dname)
4315 status = SMB_VFS_CREATE_FILE(
4318 0, /* root_dir_fid */
4319 smb_dname, /* fname */
4320 FILE_READ_ATTRIBUTES, /* access_mask */
4321 FILE_SHARE_NONE, /* share_access */
4322 FILE_CREATE, /* create_disposition*/
4323 FILE_DIRECTORY_FILE, /* create_options */
4324 FILE_ATTRIBUTE_DIRECTORY, /* file_attributes */
4325 0, /* oplock_request */
4327 0, /* allocation_size */
4328 0, /* private_flags */
4333 NULL, NULL); /* create context */
4335 if (NT_STATUS_IS_OK(status)) {
4336 close_file(req, fsp, NORMAL_CLOSE);
4342 /****************************************************************************
4343 Receive notification that one of our open files has been renamed by another
4345 ****************************************************************************/
4347 void msg_file_was_renamed(struct messaging_context *msg,
4350 struct server_id server_id,
4354 char *frm = (char *)data->data;
4356 const char *sharepath;
4357 const char *base_name;
4358 const char *stream_name;
4359 struct smb_filename *smb_fname = NULL;
4360 size_t sp_len, bn_len;
4362 struct smbd_server_connection *sconn =
4363 talloc_get_type_abort(private_data,
4364 struct smbd_server_connection);
4366 if (data->data == NULL
4367 || data->length < MSG_FILE_RENAMED_MIN_SIZE + 2) {
4368 DEBUG(0, ("msg_file_was_renamed: Got invalid msg len %d\n",
4369 (int)data->length));
4373 /* Unpack the message. */
4374 pull_file_id_24(frm, &id);
4375 sharepath = &frm[24];
4376 sp_len = strlen(sharepath);
4377 base_name = sharepath + sp_len + 1;
4378 bn_len = strlen(base_name);
4379 stream_name = sharepath + sp_len + 1 + bn_len + 1;
4381 /* stream_name must always be NULL if there is no stream. */
4382 if (stream_name[0] == '\0') {
4386 smb_fname = synthetic_smb_fname(talloc_tos(),
4391 if (smb_fname == NULL) {
4395 DEBUG(10,("msg_file_was_renamed: Got rename message for sharepath %s, new name %s, "
4397 sharepath, smb_fname_str_dbg(smb_fname),
4398 file_id_string_tos(&id)));
4400 for(fsp = file_find_di_first(sconn, id); fsp;
4401 fsp = file_find_di_next(fsp)) {
4402 if (memcmp(fsp->conn->connectpath, sharepath, sp_len) == 0) {
4404 DEBUG(10,("msg_file_was_renamed: renaming file %s from %s -> %s\n",
4405 fsp_fnum_dbg(fsp), fsp_str_dbg(fsp),
4406 smb_fname_str_dbg(smb_fname)));
4407 status = fsp_set_smb_fname(fsp, smb_fname);
4408 if (!NT_STATUS_IS_OK(status)) {
4413 /* Now we have the complete path we can work out if this is
4414 actually within this share and adjust newname accordingly. */
4415 DEBUG(10,("msg_file_was_renamed: share mismatch (sharepath %s "
4416 "not sharepath %s) "
4417 "%s from %s -> %s\n",
4418 fsp->conn->connectpath,
4422 smb_fname_str_dbg(smb_fname)));
4426 TALLOC_FREE(smb_fname);
4431 * If a main file is opened for delete, all streams need to be checked for
4432 * !FILE_SHARE_DELETE. Do this by opening with DELETE_ACCESS.
4433 * If that works, delete them all by setting the delete on close and close.
4436 static NTSTATUS open_streams_for_delete(connection_struct *conn,
4437 const struct smb_filename *smb_fname)
4439 struct stream_struct *stream_info = NULL;
4440 files_struct **streams = NULL;
4442 unsigned int num_streams = 0;
4443 TALLOC_CTX *frame = talloc_stackframe();
4446 status = vfs_streaminfo(conn, NULL, smb_fname, talloc_tos(),
4447 &num_streams, &stream_info);
4449 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_IMPLEMENTED)
4450 || NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
4451 DEBUG(10, ("no streams around\n"));
4453 return NT_STATUS_OK;
4456 if (!NT_STATUS_IS_OK(status)) {
4457 DEBUG(10, ("vfs_streaminfo failed: %s\n",
4458 nt_errstr(status)));
4462 DEBUG(10, ("open_streams_for_delete found %d streams\n",
4465 if (num_streams == 0) {
4467 return NT_STATUS_OK;
4470 streams = talloc_array(talloc_tos(), files_struct *, num_streams);
4471 if (streams == NULL) {
4472 DEBUG(0, ("talloc failed\n"));
4473 status = NT_STATUS_NO_MEMORY;
4477 for (i=0; i<num_streams; i++) {
4478 struct smb_filename *smb_fname_cp;
4480 if (strequal(stream_info[i].name, "::$DATA")) {
4485 smb_fname_cp = synthetic_smb_fname(talloc_tos(),
4486 smb_fname->base_name,
4487 stream_info[i].name,
4490 ~SMB_FILENAME_POSIX_PATH));
4491 if (smb_fname_cp == NULL) {
4492 status = NT_STATUS_NO_MEMORY;
4496 if (SMB_VFS_STAT(conn, smb_fname_cp) == -1) {
4497 DEBUG(10, ("Unable to stat stream: %s\n",
4498 smb_fname_str_dbg(smb_fname_cp)));
4501 status = SMB_VFS_CREATE_FILE(
4504 0, /* root_dir_fid */
4505 smb_fname_cp, /* fname */
4506 DELETE_ACCESS, /* access_mask */
4507 (FILE_SHARE_READ | /* share_access */
4508 FILE_SHARE_WRITE | FILE_SHARE_DELETE),
4509 FILE_OPEN, /* create_disposition*/
4510 0, /* create_options */
4511 FILE_ATTRIBUTE_NORMAL, /* file_attributes */
4512 0, /* oplock_request */
4514 0, /* allocation_size */
4515 NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE, /* private_flags */
4518 &streams[i], /* result */
4520 NULL, NULL); /* create context */
4522 if (!NT_STATUS_IS_OK(status)) {
4523 DEBUG(10, ("Could not open stream %s: %s\n",
4524 smb_fname_str_dbg(smb_fname_cp),
4525 nt_errstr(status)));
4527 TALLOC_FREE(smb_fname_cp);
4530 TALLOC_FREE(smb_fname_cp);
4534 * don't touch the variable "status" beyond this point :-)
4537 for (i -= 1 ; i >= 0; i--) {
4538 if (streams[i] == NULL) {
4542 DEBUG(10, ("Closing stream # %d, %s\n", i,
4543 fsp_str_dbg(streams[i])));
4544 close_file(NULL, streams[i], NORMAL_CLOSE);
4552 /*********************************************************************
4553 Create a default ACL by inheriting from the parent. If no inheritance
4554 from the parent available, don't set anything. This will leave the actual
4555 permissions the new file or directory already got from the filesystem
4556 as the NT ACL when read.
4557 *********************************************************************/
4559 static NTSTATUS inherit_new_acl(files_struct *fsp)
4561 TALLOC_CTX *frame = talloc_stackframe();
4562 char *parent_name = NULL;
4563 struct security_descriptor *parent_desc = NULL;
4564 NTSTATUS status = NT_STATUS_OK;
4565 struct security_descriptor *psd = NULL;
4566 const struct dom_sid *owner_sid = NULL;
4567 const struct dom_sid *group_sid = NULL;
4568 uint32_t security_info_sent = (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL);
4569 struct security_token *token = fsp->conn->session_info->security_token;
4570 bool inherit_owner =
4571 (lp_inherit_owner(SNUM(fsp->conn)) == INHERIT_OWNER_WINDOWS_AND_UNIX);
4572 bool inheritable_components = false;
4573 bool try_builtin_administrators = false;
4574 const struct dom_sid *BA_U_sid = NULL;
4575 const struct dom_sid *BA_G_sid = NULL;
4576 bool try_system = false;
4577 const struct dom_sid *SY_U_sid = NULL;
4578 const struct dom_sid *SY_G_sid = NULL;
4580 struct smb_filename *parent_smb_fname = NULL;
4582 if (!parent_dirname(frame, fsp->fsp_name->base_name, &parent_name, NULL)) {
4584 return NT_STATUS_NO_MEMORY;
4586 parent_smb_fname = synthetic_smb_fname(talloc_tos(),
4590 fsp->fsp_name->flags);
4592 if (parent_smb_fname == NULL) {
4594 return NT_STATUS_NO_MEMORY;
4597 status = SMB_VFS_GET_NT_ACL(fsp->conn,
4599 (SECINFO_OWNER | SECINFO_GROUP | SECINFO_DACL),
4602 if (!NT_STATUS_IS_OK(status)) {
4607 inheritable_components = sd_has_inheritable_components(parent_desc,
4610 if (!inheritable_components && !inherit_owner) {
4612 /* Nothing to inherit and not setting owner. */
4613 return NT_STATUS_OK;
4616 /* Create an inherited descriptor from the parent. */
4618 if (DEBUGLEVEL >= 10) {
4619 DEBUG(10,("inherit_new_acl: parent acl for %s is:\n",
4620 fsp_str_dbg(fsp) ));
4621 NDR_PRINT_DEBUG(security_descriptor, parent_desc);
4624 /* Inherit from parent descriptor if "inherit owner" set. */
4625 if (inherit_owner) {
4626 owner_sid = parent_desc->owner_sid;
4627 group_sid = parent_desc->group_sid;
4630 if (owner_sid == NULL) {
4631 if (security_token_has_builtin_administrators(token)) {
4632 try_builtin_administrators = true;
4633 } else if (security_token_is_system(token)) {
4634 try_builtin_administrators = true;
4639 if (group_sid == NULL &&
4640 token->num_sids == PRIMARY_GROUP_SID_INDEX)
4642 if (security_token_is_system(token)) {
4643 try_builtin_administrators = true;
4648 if (try_builtin_administrators) {
4653 ok = sids_to_unixids(&global_sid_Builtin_Administrators, 1, &ids);
4657 BA_U_sid = &global_sid_Builtin_Administrators;
4658 BA_G_sid = &global_sid_Builtin_Administrators;
4661 BA_U_sid = &global_sid_Builtin_Administrators;
4664 BA_G_sid = &global_sid_Builtin_Administrators;
4677 ok = sids_to_unixids(&global_sid_System, 1, &ids);
4681 SY_U_sid = &global_sid_System;
4682 SY_G_sid = &global_sid_System;
4685 SY_U_sid = &global_sid_System;
4688 SY_G_sid = &global_sid_System;
4696 if (owner_sid == NULL) {
4697 owner_sid = BA_U_sid;
4700 if (owner_sid == NULL) {
4701 owner_sid = SY_U_sid;
4704 if (group_sid == NULL) {
4705 group_sid = SY_G_sid;
4708 if (try_system && group_sid == NULL) {
4709 group_sid = BA_G_sid;
4712 if (owner_sid == NULL) {
4713 owner_sid = &token->sids[PRIMARY_USER_SID_INDEX];
4715 if (group_sid == NULL) {
4716 if (token->num_sids == PRIMARY_GROUP_SID_INDEX) {
4717 group_sid = &token->sids[PRIMARY_USER_SID_INDEX];
4719 group_sid = &token->sids[PRIMARY_GROUP_SID_INDEX];
4723 status = se_create_child_secdesc(frame,
4730 if (!NT_STATUS_IS_OK(status)) {
4735 /* If inheritable_components == false,
4736 se_create_child_secdesc()
4737 creates a security descriptor with a NULL dacl
4738 entry, but with SEC_DESC_DACL_PRESENT. We need
4739 to remove that flag. */
4741 if (!inheritable_components) {
4742 security_info_sent &= ~SECINFO_DACL;
4743 psd->type &= ~SEC_DESC_DACL_PRESENT;
4746 if (DEBUGLEVEL >= 10) {
4747 DEBUG(10,("inherit_new_acl: child acl for %s is:\n",
4748 fsp_str_dbg(fsp) ));
4749 NDR_PRINT_DEBUG(security_descriptor, psd);
4752 if (inherit_owner) {
4753 /* We need to be root to force this. */
4756 status = SMB_VFS_FSET_NT_ACL(fsp,
4759 if (inherit_owner) {
4767 * If we already have a lease, it must match the new file id. [MS-SMB2]
4768 * 3.3.5.9.8 speaks about INVALID_PARAMETER if an already used lease key is
4769 * used for a different file name.
4772 struct lease_match_state {
4773 /* Input parameters. */
4774 TALLOC_CTX *mem_ctx;
4775 const char *servicepath;
4776 const struct smb_filename *fname;
4779 /* Return parameters. */
4780 uint32_t num_file_ids;
4781 struct file_id *ids;
4782 NTSTATUS match_status;
4785 /*************************************************************
4786 File doesn't exist but this lease key+guid is already in use.
4788 This is only allowable in the dynamic share case where the
4789 service path must be different.
4791 There is a small race condition here in the multi-connection
4792 case where a client sends two create calls on different connections,
4793 where the file doesn't exist and one smbd creates the leases_db
4794 entry first, but this will get fixed by the multichannel cleanup
4795 when all identical client_guids get handled by a single smbd.
4796 **************************************************************/
4798 static void lease_match_parser_new_file(
4800 const struct leases_db_file *files,
4801 struct lease_match_state *state)
4805 for (i = 0; i < num_files; i++) {
4806 const struct leases_db_file *f = &files[i];
4807 if (strequal(state->servicepath, f->servicepath)) {
4808 state->match_status = NT_STATUS_INVALID_PARAMETER;
4813 /* Dynamic share case. Break leases on all other files. */
4814 state->match_status = leases_db_copy_file_ids(state->mem_ctx,
4818 if (!NT_STATUS_IS_OK(state->match_status)) {
4822 state->num_file_ids = num_files;
4823 state->match_status = NT_STATUS_OPLOCK_NOT_GRANTED;
4827 static void lease_match_parser(
4829 const struct leases_db_file *files,
4832 struct lease_match_state *state =
4833 (struct lease_match_state *)private_data;
4836 if (!state->file_existed) {
4838 * Deal with name mismatch or
4839 * possible dynamic share case separately
4840 * to make code clearer.
4842 lease_match_parser_new_file(num_files,
4849 state->match_status = NT_STATUS_OK;
4851 for (i = 0; i < num_files; i++) {
4852 const struct leases_db_file *f = &files[i];
4854 /* Everything should be the same. */
4855 if (!file_id_equal(&state->id, &f->id)) {
4856 /* This should catch all dynamic share cases. */
4857 state->match_status = NT_STATUS_OPLOCK_NOT_GRANTED;
4860 if (!strequal(f->servicepath, state->servicepath)) {
4861 state->match_status = NT_STATUS_INVALID_PARAMETER;
4864 if (!strequal(f->base_name, state->fname->base_name)) {
4865 state->match_status = NT_STATUS_INVALID_PARAMETER;
4868 if (!strequal(f->stream_name, state->fname->stream_name)) {
4869 state->match_status = NT_STATUS_INVALID_PARAMETER;
4874 if (NT_STATUS_IS_OK(state->match_status)) {
4876 * Common case - just opening another handle on a
4877 * file on a non-dynamic share.
4882 if (NT_STATUS_EQUAL(state->match_status, NT_STATUS_INVALID_PARAMETER)) {
4883 /* Mismatched path. Error back to client. */
4888 * File id mismatch. Dynamic share case NT_STATUS_OPLOCK_NOT_GRANTED.
4889 * Don't allow leases.
4892 state->match_status = leases_db_copy_file_ids(state->mem_ctx,
4896 if (!NT_STATUS_IS_OK(state->match_status)) {
4900 state->num_file_ids = num_files;
4901 state->match_status = NT_STATUS_OPLOCK_NOT_GRANTED;
4905 static NTSTATUS lease_match(connection_struct *conn,
4906 struct smb_request *req,
4907 struct smb2_lease_key *lease_key,
4908 const char *servicepath,
4909 const struct smb_filename *fname,
4910 uint16_t *p_version,
4913 struct smbd_server_connection *sconn = req->sconn;
4914 TALLOC_CTX *tos = talloc_tos();
4915 struct lease_match_state state = {
4917 .servicepath = servicepath,
4919 .match_status = NT_STATUS_OK
4924 state.file_existed = VALID_STAT(fname->st);
4925 if (state.file_existed) {
4926 state.id = vfs_file_id_from_sbuf(conn, &fname->st);
4928 memset(&state.id, '\0', sizeof(state.id));
4931 status = leases_db_parse(&sconn->client->connections->smb2.client.guid,
4932 lease_key, lease_match_parser, &state);
4933 if (!NT_STATUS_IS_OK(status)) {
4935 * Not found or error means okay: We can make the lease pass
4937 return NT_STATUS_OK;
4939 if (!NT_STATUS_EQUAL(state.match_status, NT_STATUS_OPLOCK_NOT_GRANTED)) {
4941 * Anything but NT_STATUS_OPLOCK_NOT_GRANTED, let the caller
4944 return state.match_status;
4947 /* We have to break all existing leases. */
4948 for (i = 0; i < state.num_file_ids; i++) {
4949 struct share_mode_lock *lck;
4950 struct share_mode_data *d;
4953 if (file_id_equal(&state.ids[i], &state.id)) {
4954 /* Don't need to break our own file. */
4958 lck = get_existing_share_mode_lock(talloc_tos(), state.ids[i]);
4960 /* Race condition - file already closed. */
4964 for (j=0; j<d->num_share_modes; j++) {
4965 struct share_mode_entry *e = &d->share_modes[j];
4966 uint32_t e_lease_type = get_lease_type(d, e);
4967 struct share_mode_lease *l = NULL;
4969 if (share_mode_stale_pid(d, j)) {
4973 if (e->op_type == LEASE_OPLOCK) {
4974 l = &lck->data->leases[e->lease_idx];
4975 if (!smb2_lease_key_equal(&l->lease_key,
4979 *p_epoch = l->epoch;
4980 *p_version = l->lease_version;
4983 if (e_lease_type == SMB2_LEASE_NONE) {
4987 send_break_message(conn->sconn->msg_ctx, &d->id, e,
4991 * Windows 7 and 8 lease clients
4992 * are broken in that they will not
4993 * respond to lease break requests
4994 * whilst waiting for an outstanding
4995 * open request on that lease handle
4996 * on the same TCP connection, due
4997 * to holding an internal inode lock.
4999 * This means we can't reschedule
5000 * ourselves here, but must return
5005 * Send the breaks and then return
5006 * SMB2_LEASE_NONE in the lease handle
5007 * to cause them to acknowledge the
5008 * lease break. Consulatation with
5009 * Microsoft engineering confirmed
5010 * this approach is safe.
5017 * Ensure we don't grant anything more so we
5020 return NT_STATUS_OPLOCK_NOT_GRANTED;
5024 * Wrapper around open_file_ntcreate and open_directory
5027 static NTSTATUS create_file_unixpath(connection_struct *conn,
5028 struct smb_request *req,
5029 struct smb_filename *smb_fname,
5030 uint32_t access_mask,
5031 uint32_t share_access,
5032 uint32_t create_disposition,
5033 uint32_t create_options,
5034 uint32_t file_attributes,
5035 uint32_t oplock_request,
5036 struct smb2_lease *lease,
5037 uint64_t allocation_size,
5038 uint32_t private_flags,
5039 struct security_descriptor *sd,
5040 struct ea_list *ea_list,
5042 files_struct **result,
5045 int info = FILE_WAS_OPENED;
5046 files_struct *base_fsp = NULL;
5047 files_struct *fsp = NULL;
5050 DEBUG(10,("create_file_unixpath: access_mask = 0x%x "
5051 "file_attributes = 0x%x, share_access = 0x%x, "
5052 "create_disposition = 0x%x create_options = 0x%x "
5053 "oplock_request = 0x%x private_flags = 0x%x "
5054 "ea_list = %p, sd = %p, "
5056 (unsigned int)access_mask,
5057 (unsigned int)file_attributes,
5058 (unsigned int)share_access,
5059 (unsigned int)create_disposition,
5060 (unsigned int)create_options,
5061 (unsigned int)oplock_request,
5062 (unsigned int)private_flags,
5063 ea_list, sd, smb_fname_str_dbg(smb_fname)));
5065 if (create_options & FILE_OPEN_BY_FILE_ID) {
5066 status = NT_STATUS_NOT_SUPPORTED;
5070 if (create_options & NTCREATEX_OPTIONS_INVALID_PARAM_MASK) {
5071 status = NT_STATUS_INVALID_PARAMETER;
5076 oplock_request |= INTERNAL_OPEN_ONLY;
5079 if (lease != NULL) {
5080 uint16_t epoch = lease->lease_epoch;
5081 uint16_t version = lease->lease_version;
5084 DBG_WARNING("Got lease on internal open\n");
5085 status = NT_STATUS_INTERNAL_ERROR;
5089 status = lease_match(conn,
5096 if (NT_STATUS_EQUAL(status, NT_STATUS_OPLOCK_NOT_GRANTED)) {
5097 /* Dynamic share file. No leases and update epoch... */
5098 lease->lease_state = SMB2_LEASE_NONE;
5099 lease->lease_epoch = epoch;
5100 lease->lease_version = version;
5101 } else if (!NT_STATUS_IS_OK(status)) {
5106 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
5107 && (access_mask & DELETE_ACCESS)
5108 && !is_ntfs_stream_smb_fname(smb_fname)) {
5110 * We can't open a file with DELETE access if any of the
5111 * streams is open without FILE_SHARE_DELETE
5113 status = open_streams_for_delete(conn, smb_fname);
5115 if (!NT_STATUS_IS_OK(status)) {
5120 if ((access_mask & SEC_FLAG_SYSTEM_SECURITY) &&
5121 !security_token_has_privilege(get_current_nttok(conn),
5122 SEC_PRIV_SECURITY)) {
5123 DEBUG(10, ("create_file_unixpath: open on %s "
5124 "failed - SEC_FLAG_SYSTEM_SECURITY denied.\n",
5125 smb_fname_str_dbg(smb_fname)));
5126 status = NT_STATUS_PRIVILEGE_NOT_HELD;
5131 * Files or directories can't be opened DELETE_ON_CLOSE without
5133 * BUG: https://bugzilla.samba.org/show_bug.cgi?id=13358
5135 if (create_options & FILE_DELETE_ON_CLOSE) {
5136 if ((access_mask & DELETE_ACCESS) == 0) {
5137 status = NT_STATUS_INVALID_PARAMETER;
5142 if ((conn->fs_capabilities & FILE_NAMED_STREAMS)
5143 && is_ntfs_stream_smb_fname(smb_fname)
5144 && (!(private_flags & NTCREATEX_OPTIONS_PRIVATE_STREAM_DELETE))) {
5145 uint32_t base_create_disposition;
5146 struct smb_filename *smb_fname_base = NULL;
5148 if (create_options & FILE_DIRECTORY_FILE) {
5149 status = NT_STATUS_NOT_A_DIRECTORY;
5153 switch (create_disposition) {
5155 base_create_disposition = FILE_OPEN;
5158 base_create_disposition = FILE_OPEN_IF;
5162 /* Create an smb_filename with stream_name == NULL. */
5163 smb_fname_base = synthetic_smb_fname(talloc_tos(),
5164 smb_fname->base_name,
5168 if (smb_fname_base == NULL) {
5169 status = NT_STATUS_NO_MEMORY;
5173 if (SMB_VFS_STAT(conn, smb_fname_base) == -1) {
5174 DEBUG(10, ("Unable to stat stream: %s\n",
5175 smb_fname_str_dbg(smb_fname_base)));
5178 * https://bugzilla.samba.org/show_bug.cgi?id=10229
5179 * We need to check if the requested access mask
5180 * could be used to open the underlying file (if
5181 * it existed), as we're passing in zero for the
5182 * access mask to the base filename.
5184 status = check_base_file_access(conn,
5188 if (!NT_STATUS_IS_OK(status)) {
5189 DEBUG(10, ("Permission check "
5190 "for base %s failed: "
5191 "%s\n", smb_fname->base_name,
5192 nt_errstr(status)));
5197 /* Open the base file. */
5198 status = create_file_unixpath(conn, NULL, smb_fname_base, 0,
5201 | FILE_SHARE_DELETE,
5202 base_create_disposition,
5203 0, 0, 0, NULL, 0, 0, NULL, NULL,
5205 TALLOC_FREE(smb_fname_base);
5207 if (!NT_STATUS_IS_OK(status)) {
5208 DEBUG(10, ("create_file_unixpath for base %s failed: "
5209 "%s\n", smb_fname->base_name,
5210 nt_errstr(status)));
5213 /* we don't need the low level fd */
5218 * If it's a request for a directory open, deal with it separately.
5221 if (create_options & FILE_DIRECTORY_FILE) {
5223 if (create_options & FILE_NON_DIRECTORY_FILE) {
5224 status = NT_STATUS_INVALID_PARAMETER;
5228 /* Can't open a temp directory. IFS kit test. */
5229 if (!(file_attributes & FILE_FLAG_POSIX_SEMANTICS) &&
5230 (file_attributes & FILE_ATTRIBUTE_TEMPORARY)) {
5231 status = NT_STATUS_INVALID_PARAMETER;
5236 * We will get a create directory here if the Win32
5237 * app specified a security descriptor in the
5238 * CreateDirectory() call.
5242 status = open_directory(
5243 conn, req, smb_fname, access_mask, share_access,
5244 create_disposition, create_options, file_attributes,
5249 * Ordinary file case.
5252 status = file_new(req, conn, &fsp);
5253 if(!NT_STATUS_IS_OK(status)) {
5257 status = fsp_set_smb_fname(fsp, smb_fname);
5258 if (!NT_STATUS_IS_OK(status)) {
5264 * We're opening the stream element of a
5265 * base_fsp we already opened. Set up the
5268 fsp->base_fsp = base_fsp;
5271 if (allocation_size) {
5272 fsp->initial_allocation_size = smb_roundup(fsp->conn,
5276 status = open_file_ntcreate(conn,
5289 if(!NT_STATUS_IS_OK(status)) {
5290 file_free(req, fsp);
5294 if (NT_STATUS_EQUAL(status, NT_STATUS_FILE_IS_A_DIRECTORY)) {
5296 /* A stream open never opens a directory */
5299 status = NT_STATUS_FILE_IS_A_DIRECTORY;
5304 * Fail the open if it was explicitly a non-directory
5308 if (create_options & FILE_NON_DIRECTORY_FILE) {
5309 status = NT_STATUS_FILE_IS_A_DIRECTORY;
5314 status = open_directory(
5315 conn, req, smb_fname, access_mask,
5316 share_access, create_disposition,
5317 create_options, file_attributes,
5322 if (!NT_STATUS_IS_OK(status)) {
5326 fsp->base_fsp = base_fsp;
5328 if ((ea_list != NULL) &&
5329 ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN))) {
5330 status = set_ea(conn, fsp, fsp->fsp_name, ea_list);
5331 if (!NT_STATUS_IS_OK(status)) {
5336 if (!fsp->is_directory && S_ISDIR(fsp->fsp_name->st.st_ex_mode)) {
5337 status = NT_STATUS_ACCESS_DENIED;
5341 /* Save the requested allocation size. */
5342 if ((info == FILE_WAS_CREATED) || (info == FILE_WAS_OVERWRITTEN)) {
5343 if ((allocation_size > fsp->fsp_name->st.st_ex_size)
5344 && !(fsp->is_directory))
5346 fsp->initial_allocation_size = smb_roundup(
5347 fsp->conn, allocation_size);
5348 if (vfs_allocate_file_space(
5349 fsp, fsp->initial_allocation_size) == -1) {
5350 status = NT_STATUS_DISK_FULL;
5354 fsp->initial_allocation_size = smb_roundup(
5355 fsp->conn, (uint64_t)fsp->fsp_name->st.st_ex_size);
5358 fsp->initial_allocation_size = 0;
5361 if ((info == FILE_WAS_CREATED) && lp_nt_acl_support(SNUM(conn)) &&
5362 fsp->base_fsp == NULL) {
5365 * According to the MS documentation, the only time the security
5366 * descriptor is applied to the opened file is iff we *created* the
5367 * file; an existing file stays the same.
5369 * Also, it seems (from observation) that you can open the file with
5370 * any access mask but you can still write the sd. We need to override
5371 * the granted access before we call set_sd
5372 * Patch for bug #2242 from Tom Lackemann <cessnatomny@yahoo.com>.
5375 uint32_t sec_info_sent;
5376 uint32_t saved_access_mask = fsp->access_mask;
5378 sec_info_sent = get_sec_info(sd);
5380 fsp->access_mask = FILE_GENERIC_ALL;
5382 if (sec_info_sent & (SECINFO_OWNER|
5386 status = set_sd(fsp, sd, sec_info_sent);
5389 fsp->access_mask = saved_access_mask;
5391 if (!NT_STATUS_IS_OK(status)) {
5394 } else if (lp_inherit_acls(SNUM(conn))) {
5395 /* Inherit from parent. Errors here are not fatal. */
5396 status = inherit_new_acl(fsp);
5397 if (!NT_STATUS_IS_OK(status)) {
5398 DEBUG(10,("inherit_new_acl: failed for %s with %s\n",
5400 nt_errstr(status) ));
5405 if ((conn->fs_capabilities & FILE_FILE_COMPRESSION)
5406 && (create_options & FILE_NO_COMPRESSION)
5407 && (info == FILE_WAS_CREATED)) {
5408 status = SMB_VFS_SET_COMPRESSION(conn, fsp, fsp,
5409 COMPRESSION_FORMAT_NONE);
5410 if (!NT_STATUS_IS_OK(status)) {
5411 DEBUG(1, ("failed to disable compression: %s\n",
5412 nt_errstr(status)));
5416 DEBUG(10, ("create_file_unixpath: info=%d\n", info));
5419 if (pinfo != NULL) {
5423 smb_fname->st = fsp->fsp_name->st;
5425 return NT_STATUS_OK;
5428 DEBUG(10, ("create_file_unixpath: %s\n", nt_errstr(status)));
5431 if (base_fsp && fsp->base_fsp == base_fsp) {
5433 * The close_file below will close
5438 close_file(req, fsp, ERROR_CLOSE);
5441 if (base_fsp != NULL) {
5442 close_file(req, base_fsp, ERROR_CLOSE);
5449 * Calculate the full path name given a relative fid.
5451 NTSTATUS get_relative_fid_filename(connection_struct *conn,
5452 struct smb_request *req,
5453 uint16_t root_dir_fid,
5454 const struct smb_filename *smb_fname,
5455 struct smb_filename **smb_fname_out)
5457 files_struct *dir_fsp;
5458 char *parent_fname = NULL;
5459 char *new_base_name = NULL;
5460 uint32_t ucf_flags = ucf_flags_from_smb_request(req);
5463 if (root_dir_fid == 0 || !smb_fname) {
5464 status = NT_STATUS_INTERNAL_ERROR;
5468 dir_fsp = file_fsp(req, root_dir_fid);
5470 if (dir_fsp == NULL) {
5471 status = NT_STATUS_INVALID_HANDLE;
5475 if (is_ntfs_stream_smb_fname(dir_fsp->fsp_name)) {
5476 status = NT_STATUS_INVALID_HANDLE;
5480 if (!dir_fsp->is_directory) {
5483 * Check to see if this is a mac fork of some kind.
5486 if ((conn->fs_capabilities & FILE_NAMED_STREAMS) &&
5487 is_ntfs_stream_smb_fname(smb_fname)) {
5488 status = NT_STATUS_OBJECT_PATH_NOT_FOUND;
5493 we need to handle the case when we get a
5494 relative open relative to a file and the
5495 pathname is blank - this is a reopen!
5496 (hint from demyn plantenberg)
5499 status = NT_STATUS_INVALID_HANDLE;
5503 if (ISDOT(dir_fsp->fsp_name->base_name)) {
5505 * We're at the toplevel dir, the final file name
5506 * must not contain ./, as this is filtered out
5507 * normally by srvstr_get_path and unix_convert
5508 * explicitly rejects paths containing ./.
5510 parent_fname = talloc_strdup(talloc_tos(), "");
5511 if (parent_fname == NULL) {
5512 status = NT_STATUS_NO_MEMORY;
5516 size_t dir_name_len = strlen(dir_fsp->fsp_name->base_name);
5519 * Copy in the base directory name.
5522 parent_fname = talloc_array(talloc_tos(), char,
5524 if (parent_fname == NULL) {
5525 status = NT_STATUS_NO_MEMORY;
5528 memcpy(parent_fname, dir_fsp->fsp_name->base_name,
5532 * Ensure it ends in a '/'.
5533 * We used TALLOC_SIZE +2 to add space for the '/'.
5537 && (parent_fname[dir_name_len-1] != '\\')
5538 && (parent_fname[dir_name_len-1] != '/')) {
5539 parent_fname[dir_name_len] = '/';
5540 parent_fname[dir_name_len+1] = '\0';
5544 new_base_name = talloc_asprintf(talloc_tos(), "%s%s", parent_fname,
5545 smb_fname->base_name);
5546 if (new_base_name == NULL) {
5547 status = NT_STATUS_NO_MEMORY;
5551 status = filename_convert(req,
5557 if (!NT_STATUS_IS_OK(status)) {
5562 TALLOC_FREE(parent_fname);
5563 TALLOC_FREE(new_base_name);
5567 NTSTATUS create_file_default(connection_struct *conn,
5568 struct smb_request *req,
5569 uint16_t root_dir_fid,
5570 struct smb_filename *smb_fname,
5571 uint32_t access_mask,
5572 uint32_t share_access,
5573 uint32_t create_disposition,
5574 uint32_t create_options,
5575 uint32_t file_attributes,
5576 uint32_t oplock_request,
5577 struct smb2_lease *lease,
5578 uint64_t allocation_size,
5579 uint32_t private_flags,
5580 struct security_descriptor *sd,
5581 struct ea_list *ea_list,
5582 files_struct **result,
5584 const struct smb2_create_blobs *in_context_blobs,
5585 struct smb2_create_blobs *out_context_blobs)
5587 int info = FILE_WAS_OPENED;
5588 files_struct *fsp = NULL;
5590 bool stream_name = false;
5592 DEBUG(10,("create_file: access_mask = 0x%x "
5593 "file_attributes = 0x%x, share_access = 0x%x, "
5594 "create_disposition = 0x%x create_options = 0x%x "
5595 "oplock_request = 0x%x "
5596 "private_flags = 0x%x "
5597 "root_dir_fid = 0x%x, ea_list = %p, sd = %p, "
5599 (unsigned int)access_mask,
5600 (unsigned int)file_attributes,
5601 (unsigned int)share_access,
5602 (unsigned int)create_disposition,
5603 (unsigned int)create_options,
5604 (unsigned int)oplock_request,
5605 (unsigned int)private_flags,
5606 (unsigned int)root_dir_fid,
5607 ea_list, sd, smb_fname_str_dbg(smb_fname)));
5610 * Calculate the filename from the root_dir_if if necessary.
5613 if (root_dir_fid != 0) {
5614 struct smb_filename *smb_fname_out = NULL;
5615 status = get_relative_fid_filename(conn, req, root_dir_fid,
5616 smb_fname, &smb_fname_out);
5617 if (!NT_STATUS_IS_OK(status)) {
5620 smb_fname = smb_fname_out;
5624 * Check to see if this is a mac fork of some kind.
5627 stream_name = is_ntfs_stream_smb_fname(smb_fname);
5629 enum FAKE_FILE_TYPE fake_file_type;
5631 fake_file_type = is_fake_file(smb_fname);
5633 if (fake_file_type != FAKE_FILE_TYPE_NONE) {
5636 * Here we go! support for changing the disk quotas
5639 * We need to fake up to open this MAGIC QUOTA file
5640 * and return a valid FID.
5642 * w2k close this file directly after openening xp
5643 * also tries a QUERY_FILE_INFO on the file and then
5646 status = open_fake_file(req, conn, req->vuid,
5647 fake_file_type, smb_fname,
5649 if (!NT_STATUS_IS_OK(status)) {
5653 ZERO_STRUCT(smb_fname->st);
5657 if (!(conn->fs_capabilities & FILE_NAMED_STREAMS)) {
5658 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
5663 if (is_ntfs_default_stream_smb_fname(smb_fname)) {
5665 smb_fname->stream_name = NULL;
5666 /* We have to handle this error here. */
5667 if (create_options & FILE_DIRECTORY_FILE) {
5668 status = NT_STATUS_NOT_A_DIRECTORY;
5671 if (req != NULL && req->posix_pathnames) {
5672 ret = SMB_VFS_LSTAT(conn, smb_fname);
5674 ret = SMB_VFS_STAT(conn, smb_fname);
5677 if (ret == 0 && VALID_STAT_OF_DIR(smb_fname->st)) {
5678 status = NT_STATUS_FILE_IS_A_DIRECTORY;
5683 status = create_file_unixpath(
5684 conn, req, smb_fname, access_mask, share_access,
5685 create_disposition, create_options, file_attributes,
5686 oplock_request, lease, allocation_size, private_flags,
5690 if (!NT_STATUS_IS_OK(status)) {
5695 DEBUG(10, ("create_file: info=%d\n", info));
5698 if (pinfo != NULL) {
5701 return NT_STATUS_OK;
5704 DEBUG(10, ("create_file: %s\n", nt_errstr(status)));
5707 close_file(req, fsp, ERROR_CLOSE);