2 * Store Windows ACLs in xattrs.
4 * Copyright (C) Volker Lendecke, 2008
5 * Copyright (C) Jeremy Allison, 2008
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, see <http://www.gnu.org/licenses/>.
21 /* NOTE: This is an experimental module, not yet finished. JRA. */
24 #include "smbd/smbd.h"
25 #include "librpc/gen_ndr/xattr.h"
26 #include "librpc/gen_ndr/ndr_xattr.h"
27 #include "../lib/crypto/crypto.h"
31 #define DBGC_CLASS DBGC_VFS
33 /* Pull in the common functions. */
34 #define ACL_MODULE_NAME "acl_xattr"
36 #include "modules/vfs_acl_common.c"
38 /*******************************************************************
39 Pull a security descriptor into a DATA_BLOB from a xattr.
40 *******************************************************************/
42 static NTSTATUS get_acl_blob(TALLOC_CTX *ctx,
43 vfs_handle_struct *handle,
58 tmp = TALLOC_REALLOC_ARRAY(ctx, val, uint8_t, size);
61 return NT_STATUS_NO_MEMORY;
66 if (fsp && fsp->fh->fd != -1) {
67 sizeret = SMB_VFS_FGETXATTR(fsp, XATTR_NTACL_NAME, val, size);
69 sizeret = SMB_VFS_GETXATTR(handle->conn, name,
70 XATTR_NTACL_NAME, val, size);
77 /* Max ACL size is 65536 bytes. */
80 if ((errno == ERANGE) && (size != 65536)) {
81 /* Too small, try again. */
86 /* Real error - exit here. */
88 return map_nt_error_from_unix(errno);
92 pblob->length = sizeret;
96 /*******************************************************************
97 Store a DATA_BLOB into an xattr given an fsp pointer.
98 *******************************************************************/
100 static NTSTATUS store_acl_blob_fsp(vfs_handle_struct *handle,
107 DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
108 (unsigned int)pblob->length, fsp_str_dbg(fsp)));
111 if (fsp->fh->fd != -1) {
112 ret = SMB_VFS_FSETXATTR(fsp, XATTR_NTACL_NAME,
113 pblob->data, pblob->length, 0);
115 ret = SMB_VFS_SETXATTR(fsp->conn, fsp->fsp_name->base_name,
117 pblob->data, pblob->length, 0);
125 DEBUG(5, ("store_acl_blob_fsp: setting attr failed for file %s"
129 return map_nt_error_from_unix(errno);
134 /*********************************************************************
135 Remove a Windows ACL - we're setting the underlying POSIX ACL.
136 *********************************************************************/
138 static int sys_acl_set_file_xattr(vfs_handle_struct *handle,
143 int ret = SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle,
152 SMB_VFS_REMOVEXATTR(handle->conn, name, XATTR_NTACL_NAME);
158 /*********************************************************************
159 Remove a Windows ACL - we're setting the underlying POSIX ACL.
160 *********************************************************************/
162 static int sys_acl_set_fd_xattr(vfs_handle_struct *handle,
166 int ret = SMB_VFS_NEXT_SYS_ACL_SET_FD(handle,
174 SMB_VFS_FREMOVEXATTR(fsp, XATTR_NTACL_NAME);
180 static int connect_acl_xattr(struct vfs_handle_struct *handle,
184 int ret = SMB_VFS_NEXT_CONNECT(handle, service, user);
190 /* Ensure we have the parameters correct if we're
191 * using this module. */
192 DEBUG(2,("connect_acl_xattr: setting 'inherit acls = true' "
193 "'dos filemode = true' and "
194 "'force unknown acl user = true' for service %s\n",
197 lp_do_parameter(SNUM(handle->conn), "inherit acls", "true");
198 lp_do_parameter(SNUM(handle->conn), "dos filemode", "true");
199 lp_do_parameter(SNUM(handle->conn), "force unknown acl user", "true");
204 static struct vfs_fn_pointers vfs_acl_xattr_fns = {
205 .connect_fn = connect_acl_xattr,
206 .opendir = opendir_acl_common,
207 .mkdir = mkdir_acl_common,
208 .rmdir = rmdir_acl_common,
209 .open_fn = open_acl_common,
210 .create_file = create_file_acl_common,
211 .unlink = unlink_acl_common,
212 .chmod = chmod_acl_module_common,
213 .fchmod = fchmod_acl_module_common,
214 .fget_nt_acl = fget_nt_acl_common,
215 .get_nt_acl = get_nt_acl_common,
216 .fset_nt_acl = fset_nt_acl_common,
217 .chmod_acl = chmod_acl_acl_module_common,
218 .fchmod_acl = fchmod_acl_acl_module_common,
219 .sys_acl_set_file = sys_acl_set_file_xattr,
220 .sys_acl_set_fd = sys_acl_set_fd_xattr
223 NTSTATUS vfs_acl_xattr_init(void)
225 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "acl_xattr",