source: trunk/server/source3/modules/vfs_default_quota.c

Last change on this file was 745, checked in by Silvan Scherrer, 13 years ago

Samba Server: updated trunk to 3.6.0
File size: 6.9 KB
Line 
1/*
2 * Store default Quotas in a specified quota record
3 *
4 * Copyright (C) Stefan (metze) Metzmacher 2003
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 */
19
20/*
21 * This module allows the default quota values,
22 * in the windows explorer GUI, to be stored on a samba server.
23 * The problem is that linux filesystems only store quotas
24 * for users and groups, but no default quotas.
25 *
26 * Samba returns NO_LIMIT as the default quotas by default
27 * and refuses to update them.
28 *
29 * With this module you can store the default quotas that are reported to
30 * a windows client, in the quota record of a user. By default the root user
31 * is taken because quota limits for root are typically not enforced.
32 *
33 * This module takes 2 parametric parameters in smb.conf:
34 * (the default prefix for them is 'default_quota',
35 * it can be overwrittem when you load the module in
36 * the 'vfs objects' parameter like this:
37 * vfs objects = default_quota:myprefix)
38 *
39 * "<myprefix>:uid" parameter takes a integer argument,
40 * it specifies the uid of the quota record, that will be taken for
41 * storing the default USER-quotas.
42 *
43 * - default value: '0' (for root user)
44 * - e.g.: default_quota:uid = 65534
45 *
46 * "<myprefix>:uid nolimit" parameter takes a boolean argument,
47 * it specifies if we should report the stored default quota values,
48 * also for the user record, or if you should just report NO_LIMIT
49 * to the windows client for the user specified by the "<prefix>:uid" parameter.
50 *
51 * - default value: yes (that means to report NO_LIMIT)
52 * - e.g.: default_quota:uid nolimit = no
53 *
54 * "<myprefix>:gid" parameter takes a integer argument,
55 * it's just like "<prefix>:uid" but for group quotas.
56 * (NOTE: group quotas are not supported from the windows explorer!)
57 *
58 * - default value: '0' (for root group)
59 * - e.g.: default_quota:gid = 65534
60 *
61 * "<myprefix>:gid nolimit" parameter takes a boolean argument,
62 * it's just like "<prefix>:uid nolimit" but for group quotas.
63 * (NOTE: group quotas are not supported from the windows explorer!)
64 *
65 * - default value: yes (that means to report NO_LIMIT)
66 * - e.g.: default_quota:uid nolimit = no
67 *
68 */
69
70#include "includes.h"
71#include "smbd/smbd.h"
72
73#undef DBGC_CLASS
74#define DBGC_CLASS DBGC_QUOTA
75
76#define DEFAULT_QUOTA_NAME "default_quota"
77
78#define DEFAULT_QUOTA_UID_DEFAULT 0
79#define DEFAULT_QUOTA_UID_NOLIMIT_DEFAULT True
80#define DEFAULT_QUOTA_GID_DEFAULT 0
81#define DEFAULT_QUOTA_GID_NOLIMIT_DEFAULT True
82
83#define DEFAULT_QUOTA_UID(handle) \
84 (uid_t)lp_parm_int(SNUM((handle)->conn),DEFAULT_QUOTA_NAME,"uid",DEFAULT_QUOTA_UID_DEFAULT)
85
86#define DEFAULT_QUOTA_UID_NOLIMIT(handle) \
87 lp_parm_bool(SNUM((handle)->conn),DEFAULT_QUOTA_NAME,"uid nolimit",DEFAULT_QUOTA_UID_NOLIMIT_DEFAULT)
88
89#define DEFAULT_QUOTA_GID(handle) \
90 (gid_t)lp_parm_int(SNUM((handle)->conn),DEFAULT_QUOTA_NAME,"gid",DEFAULT_QUOTA_GID_DEFAULT)
91
92#define DEFAULT_QUOTA_GID_NOLIMIT(handle) \
93 lp_parm_bool(SNUM((handle)->conn),DEFAULT_QUOTA_NAME,"gid nolimit",DEFAULT_QUOTA_GID_NOLIMIT_DEFAULT)
94
95static int default_quota_get_quota(vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dq)
96{
97 int ret = -1;
98
99 if ((ret=SMB_VFS_NEXT_GET_QUOTA(handle, qtype, id, dq))!=0) {
100 return ret;
101 }
102
103 switch (qtype) {
104 case SMB_USER_QUOTA_TYPE:
105 /* we use id.uid == 0 for default quotas */
106 if ((id.uid==DEFAULT_QUOTA_UID(handle)) &&
107 DEFAULT_QUOTA_UID_NOLIMIT(handle)) {
108 SMB_QUOTAS_SET_NO_LIMIT(dq);
109 }
110 break;
111#ifdef HAVE_GROUP_QUOTA
112 case SMB_GROUP_QUOTA_TYPE:
113 /* we use id.gid == 0 for default quotas */
114 if ((id.gid==DEFAULT_QUOTA_GID(handle)) &&
115 DEFAULT_QUOTA_GID_NOLIMIT(handle)) {
116 SMB_QUOTAS_SET_NO_LIMIT(dq);
117 }
118 break;
119#endif /* HAVE_GROUP_QUOTA */
120 case SMB_USER_FS_QUOTA_TYPE:
121 {
122 unid_t qid;
123 uint32 qflags = dq->qflags;
124 qid.uid = DEFAULT_QUOTA_UID(handle);
125 SMB_VFS_NEXT_GET_QUOTA(handle, SMB_USER_QUOTA_TYPE, qid, dq);
126 dq->qflags = qflags;
127 }
128 break;
129#ifdef HAVE_GROUP_QUOTA
130 case SMB_GROUP_FS_QUOTA_TYPE:
131 {
132 unid_t qid;
133 uint32 qflags = dq->qflags;
134 qid.gid = DEFAULT_QUOTA_GID(handle);
135 SMB_VFS_NEXT_GET_QUOTA(handle, SMB_GROUP_QUOTA_TYPE, qid, dq);
136 dq->qflags = qflags;
137 }
138 break;
139#endif /* HAVE_GROUP_QUOTA */
140 default:
141 errno = ENOSYS;
142 return -1;
143 break;
144 }
145
146 return ret;
147}
148
149static int default_quota_set_quota(vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dq)
150{
151 int ret = -1;
152
153 switch (qtype) {
154 case SMB_USER_QUOTA_TYPE:
155 /* we use id.uid == 0 for default quotas */
156 if ((id.uid==DEFAULT_QUOTA_UID(handle)) &&
157 DEFAULT_QUOTA_UID_NOLIMIT(handle)) {
158 return -1;
159 }
160 break;
161#ifdef HAVE_GROUP_QUOTA
162 case SMB_GROUP_QUOTA_TYPE:
163 /* we use id.gid == 0 for default quotas */
164 if ((id.gid==DEFAULT_QUOTA_GID(handle)) &&
165 DEFAULT_QUOTA_GID_NOLIMIT(handle)) {
166 return -1;
167 }
168 break;
169#endif /* HAVE_GROUP_QUOTA */
170 case SMB_USER_FS_QUOTA_TYPE:
171 break;
172#ifdef HAVE_GROUP_QUOTA
173 case SMB_GROUP_FS_QUOTA_TYPE:
174 break;
175#endif /* HAVE_GROUP_QUOTA */
176 default:
177 errno = ENOSYS;
178 return -1;
179 break;
180 }
181
182 if ((ret=SMB_VFS_NEXT_SET_QUOTA(handle, qtype, id, dq))!=0) {
183 return ret;
184 }
185
186 switch (qtype) {
187 case SMB_USER_QUOTA_TYPE:
188 break;
189#ifdef HAVE_GROUP_QUOTA
190 case SMB_GROUP_QUOTA_TYPE:
191 break;
192#endif /* HAVE_GROUP_QUOTA */
193 case SMB_USER_FS_QUOTA_TYPE:
194 {
195 unid_t qid;
196 qid.uid = DEFAULT_QUOTA_UID(handle);
197 ret = SMB_VFS_NEXT_SET_QUOTA(handle, SMB_USER_QUOTA_TYPE, qid, dq);
198 }
199 break;
200#ifdef HAVE_GROUP_QUOTA
201 case SMB_GROUP_FS_QUOTA_TYPE:
202 {
203 unid_t qid;
204 qid.gid = DEFAULT_QUOTA_GID(handle);
205 ret = SMB_VFS_NEXT_SET_QUOTA(handle, SMB_GROUP_QUOTA_TYPE, qid, dq);
206 }
207 break;
208#endif /* HAVE_GROUP_QUOTA */
209 default:
210 errno = ENOSYS;
211 return -1;
212 break;
213 }
214
215 return ret;
216}
217
218static struct vfs_fn_pointers vfs_default_quota_fns = {
219 .get_quota = default_quota_get_quota,
220 .set_quota = default_quota_set_quota
221};
222
223NTSTATUS vfs_default_quota_init(void);
224NTSTATUS vfs_default_quota_init(void)
225{
226 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, DEFAULT_QUOTA_NAME,
227 &vfs_default_quota_fns);
228}
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