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 "librpc/gen_ndr/xattr.h"
25 #include "librpc/gen_ndr/ndr_xattr.h"
26 #include "../lib/crypto/crypto.h"
29 #define DBGC_CLASS DBGC_VFS
31 /* Pull in the common functions. */
32 #include "modules/vfs_acl_common.c"
34 /*******************************************************************
35 Pull a security descriptor into a DATA_BLOB from a xattr.
36 *******************************************************************/
38 static NTSTATUS get_acl_blob(TALLOC_CTX *ctx,
39 vfs_handle_struct *handle,
54 tmp = TALLOC_REALLOC_ARRAY(ctx, val, uint8_t, size);
57 return NT_STATUS_NO_MEMORY;
62 if (fsp && fsp->fh->fd != -1) {
63 sizeret = SMB_VFS_FGETXATTR(fsp, XATTR_NTACL_NAME, val, size);
65 sizeret = SMB_VFS_GETXATTR(handle->conn, name,
66 XATTR_NTACL_NAME, val, size);
73 /* Max ACL size is 65536 bytes. */
76 if ((errno == ERANGE) && (size != 65536)) {
77 /* Too small, try again. */
82 /* Real error - exit here. */
84 return map_nt_error_from_unix(errno);
88 pblob->length = sizeret;
92 /*******************************************************************
93 Store a DATA_BLOB into an xattr given an fsp pointer.
94 *******************************************************************/
96 static NTSTATUS store_acl_blob_fsp(vfs_handle_struct *handle,
103 DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
104 (unsigned int)pblob->length, fsp_str_dbg(fsp)));
107 if (fsp->fh->fd != -1) {
108 ret = SMB_VFS_FSETXATTR(fsp, XATTR_NTACL_NAME,
109 pblob->data, pblob->length, 0);
111 ret = SMB_VFS_SETXATTR(fsp->conn, fsp->fsp_name->base_name,
113 pblob->data, pblob->length, 0);
121 DEBUG(5, ("store_acl_blob_fsp: setting attr failed for file %s"
125 return map_nt_error_from_unix(errno);
130 /*******************************************************************
131 Store a DATA_BLOB into an xattr given a pathname.
132 *******************************************************************/
134 static NTSTATUS store_acl_blob_pathname(vfs_handle_struct *handle,
138 connection_struct *conn = handle->conn;
142 DEBUG(10,("store_acl_blob_pathname: storing blob "
143 "length %u on file %s\n",
144 (unsigned int)pblob->length, fname));
147 ret = SMB_VFS_SETXATTR(conn, fname,
149 pblob->data, pblob->length, 0);
156 DEBUG(5, ("store_acl_blob_pathname: setting attr failed "
157 "for file %s with error %s\n",
160 return map_nt_error_from_unix(errno);
165 /*********************************************************************
166 Remove a Windows ACL - we're setting the underlying POSIX ACL.
167 *********************************************************************/
169 static int sys_acl_set_file_xattr(vfs_handle_struct *handle,
174 int ret = SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle,
183 SMB_VFS_REMOVEXATTR(handle->conn, name, XATTR_NTACL_NAME);
189 /*********************************************************************
190 Remove a Windows ACL - we're setting the underlying POSIX ACL.
191 *********************************************************************/
193 static int sys_acl_set_fd_xattr(vfs_handle_struct *handle,
197 int ret = SMB_VFS_NEXT_SYS_ACL_SET_FD(handle,
205 SMB_VFS_FREMOVEXATTR(fsp, XATTR_NTACL_NAME);
212 static struct vfs_fn_pointers vfs_acl_xattr_fns = {
213 .mkdir = mkdir_acl_common,
214 .open = open_acl_common,
215 .fget_nt_acl = fget_nt_acl_common,
216 .get_nt_acl = get_nt_acl_common,
217 .fset_nt_acl = fset_nt_acl_common,
218 .sys_acl_set_file = sys_acl_set_file_xattr,
219 .sys_acl_set_fd = sys_acl_set_fd_xattr
222 NTSTATUS vfs_acl_xattr_init(void)
224 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "acl_xattr",