1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
/*
* Store Windows ACLs in xattrs.
*
* Copyright (C) Volker Lendecke, 2008
* Copyright (C) Jeremy Allison, 2008
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
/* NOTE: This is an experimental module, not yet finished. JRA. */
#include "includes.h"
#include "librpc/gen_ndr/xattr.h"
#include "librpc/gen_ndr/ndr_xattr.h"
#include "../lib/crypto/crypto.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_VFS
/* Pull in the common functions. */
#include "modules/vfs_acl_common.c"
/*******************************************************************
Pull a security descriptor into a DATA_BLOB from a xattr.
*******************************************************************/
static NTSTATUS get_acl_blob(TALLOC_CTX *ctx,
vfs_handle_struct *handle,
files_struct *fsp,
const char *name,
DATA_BLOB *pblob)
{
size_t size = 1024;
uint8_t *val = NULL;
uint8_t *tmp;
ssize_t sizeret;
int saved_errno = 0;
ZERO_STRUCTP(pblob);
again:
tmp = TALLOC_REALLOC_ARRAY(ctx, val, uint8_t, size);
if (tmp == NULL) {
TALLOC_FREE(val);
return NT_STATUS_NO_MEMORY;
}
val = tmp;
become_root();
if (fsp && fsp->fh->fd != -1) {
sizeret = SMB_VFS_FGETXATTR(fsp, XATTR_NTACL_NAME, val, size);
} else {
sizeret = SMB_VFS_GETXATTR(handle->conn, name,
XATTR_NTACL_NAME, val, size);
}
if (sizeret == -1) {
saved_errno = errno;
}
unbecome_root();
/* Max ACL size is 65536 bytes. */
if (sizeret == -1) {
errno = saved_errno;
if ((errno == ERANGE) && (size != 65536)) {
/* Too small, try again. */
size = 65536;
goto again;
}
/* Real error - exit here. */
TALLOC_FREE(val);
return map_nt_error_from_unix(errno);
}
pblob->data = val;
pblob->length = sizeret;
return NT_STATUS_OK;
}
/*******************************************************************
Store a DATA_BLOB into an xattr given an fsp pointer.
*******************************************************************/
static NTSTATUS store_acl_blob_fsp(vfs_handle_struct *handle,
files_struct *fsp,
DATA_BLOB *pblob)
{
int ret;
int saved_errno = 0;
DEBUG(10,("store_acl_blob_fsp: storing blob length %u on file %s\n",
(unsigned int)pblob->length, fsp_str_dbg(fsp)));
become_root();
if (fsp->fh->fd != -1) {
ret = SMB_VFS_FSETXATTR(fsp, XATTR_NTACL_NAME,
pblob->data, pblob->length, 0);
} else {
ret = SMB_VFS_SETXATTR(fsp->conn, fsp->fsp_name->base_name,
XATTR_NTACL_NAME,
pblob->data, pblob->length, 0);
}
if (ret) {
saved_errno = errno;
}
unbecome_root();
if (ret) {
errno = saved_errno;
DEBUG(5, ("store_acl_blob_fsp: setting attr failed for file %s"
"with error %s\n",
fsp_str_dbg(fsp),
strerror(errno) ));
return map_nt_error_from_unix(errno);
}
return NT_STATUS_OK;
}
/*******************************************************************
Store a DATA_BLOB into an xattr given a pathname.
*******************************************************************/
static NTSTATUS store_acl_blob_pathname(vfs_handle_struct *handle,
const char *fname,
DATA_BLOB *pblob)
{
connection_struct *conn = handle->conn;
int ret;
int saved_errno = 0;
DEBUG(10,("store_acl_blob_pathname: storing blob "
"length %u on file %s\n",
(unsigned int)pblob->length, fname));
become_root();
ret = SMB_VFS_SETXATTR(conn, fname,
XATTR_NTACL_NAME,
pblob->data, pblob->length, 0);
if (ret) {
saved_errno = errno;
}
unbecome_root();
if (ret) {
errno = saved_errno;
DEBUG(5, ("store_acl_blob_pathname: setting attr failed "
"for file %s with error %s\n",
fname,
strerror(errno) ));
return map_nt_error_from_unix(errno);
}
return NT_STATUS_OK;
}
/*********************************************************************
Remove a Windows ACL - we're setting the underlying POSIX ACL.
*********************************************************************/
static int sys_acl_set_file_xattr(vfs_handle_struct *handle,
const char *name,
SMB_ACL_TYPE_T type,
SMB_ACL_T theacl)
{
int ret = SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle,
name,
type,
theacl);
if (ret == -1) {
return -1;
}
become_root();
SMB_VFS_REMOVEXATTR(handle->conn, name, XATTR_NTACL_NAME);
unbecome_root();
return ret;
}
/*********************************************************************
Remove a Windows ACL - we're setting the underlying POSIX ACL.
*********************************************************************/
static int sys_acl_set_fd_xattr(vfs_handle_struct *handle,
files_struct *fsp,
SMB_ACL_T theacl)
{
int ret = SMB_VFS_NEXT_SYS_ACL_SET_FD(handle,
fsp,
theacl);
if (ret == -1) {
return -1;
}
become_root();
SMB_VFS_FREMOVEXATTR(fsp, XATTR_NTACL_NAME);
unbecome_root();
return ret;
}
static int connect_acl_xattr(struct vfs_handle_struct *handle,
const char *service,
const char *user)
{
/* Ensure we have "inherit acls = yes" if we're
* using this module. */
DEBUG(2,("connect_acl_xattr: setting 'inherit acls = true' for service %s\n",
service ));
set_inherit_acls(SNUM(handle->conn));
return 0;
}
static struct vfs_fn_pointers vfs_acl_xattr_fns = {
.connect_fn = connect_acl_xattr,
.mkdir = mkdir_acl_common,
.open = open_acl_common,
.fget_nt_acl = fget_nt_acl_common,
.get_nt_acl = get_nt_acl_common,
.fset_nt_acl = fset_nt_acl_common,
.sys_acl_set_file = sys_acl_set_file_xattr,
.sys_acl_set_fd = sys_acl_set_fd_xattr
};
NTSTATUS vfs_acl_xattr_init(void)
{
return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "acl_xattr",
&vfs_acl_xattr_fns);
}
|
