source: vendor/current/source3/modules/vfs_default_quota.c@ 988

Last change on this file since 988 was 988, checked in by Silvan Scherrer, 9 years ago

Samba Server: update vendor to version 4.4.3
File size: 6.8 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, const char *path,
96 enum SMB_QUOTA_TYPE qtype, unid_t id,
97 SMB_DISK_QUOTA *dq)
98{
99 int ret = -1;
100
101 if ((ret = SMB_VFS_NEXT_GET_QUOTA(handle, path, qtype, id, dq)) != 0) {
102 return ret;
103 }
104
105 switch (qtype) {
106 case SMB_USER_QUOTA_TYPE:
107 /* we use id.uid == 0 for default quotas */
108 if ((id.uid==DEFAULT_QUOTA_UID(handle)) &&
109 DEFAULT_QUOTA_UID_NOLIMIT(handle)) {
110 SMB_QUOTAS_SET_NO_LIMIT(dq);
111 }
112 break;
113#ifdef HAVE_GROUP_QUOTA
114 case SMB_GROUP_QUOTA_TYPE:
115 /* we use id.gid == 0 for default quotas */
116 if ((id.gid==DEFAULT_QUOTA_GID(handle)) &&
117 DEFAULT_QUOTA_GID_NOLIMIT(handle)) {
118 SMB_QUOTAS_SET_NO_LIMIT(dq);
119 }
120 break;
121#endif /* HAVE_GROUP_QUOTA */
122 case SMB_USER_FS_QUOTA_TYPE:
123 {
124 unid_t qid;
125 uint32_t qflags = dq->qflags;
126 qid.uid = DEFAULT_QUOTA_UID(handle);
127 SMB_VFS_NEXT_GET_QUOTA(
128 handle, path, SMB_USER_QUOTA_TYPE, qid, dq);
129 dq->qflags = qflags;
130 }
131 break;
132#ifdef HAVE_GROUP_QUOTA
133 case SMB_GROUP_FS_QUOTA_TYPE:
134 {
135 unid_t qid;
136 uint32_t qflags = dq->qflags;
137 qid.gid = DEFAULT_QUOTA_GID(handle);
138 SMB_VFS_NEXT_GET_QUOTA(handle, path,
139 SMB_GROUP_QUOTA_TYPE,
140 qid, dq);
141 dq->qflags = qflags;
142 }
143 break;
144#endif /* HAVE_GROUP_QUOTA */
145 default:
146 errno = ENOSYS;
147 return -1;
148 break;
149 }
150
151 return ret;
152}
153
154static int default_quota_set_quota(vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dq)
155{
156 int ret = -1;
157
158 switch (qtype) {
159 case SMB_USER_QUOTA_TYPE:
160 /* we use id.uid == 0 for default quotas */
161 if ((id.uid==DEFAULT_QUOTA_UID(handle)) &&
162 DEFAULT_QUOTA_UID_NOLIMIT(handle)) {
163 return -1;
164 }
165 break;
166#ifdef HAVE_GROUP_QUOTA
167 case SMB_GROUP_QUOTA_TYPE:
168 /* we use id.gid == 0 for default quotas */
169 if ((id.gid==DEFAULT_QUOTA_GID(handle)) &&
170 DEFAULT_QUOTA_GID_NOLIMIT(handle)) {
171 return -1;
172 }
173 break;
174#endif /* HAVE_GROUP_QUOTA */
175 case SMB_USER_FS_QUOTA_TYPE:
176 break;
177#ifdef HAVE_GROUP_QUOTA
178 case SMB_GROUP_FS_QUOTA_TYPE:
179 break;
180#endif /* HAVE_GROUP_QUOTA */
181 default:
182 errno = ENOSYS;
183 return -1;
184 break;
185 }
186
187 if ((ret=SMB_VFS_NEXT_SET_QUOTA(handle, qtype, id, dq))!=0) {
188 return ret;
189 }
190
191 switch (qtype) {
192 case SMB_USER_QUOTA_TYPE:
193 break;
194#ifdef HAVE_GROUP_QUOTA
195 case SMB_GROUP_QUOTA_TYPE:
196 break;
197#endif /* HAVE_GROUP_QUOTA */
198 case SMB_USER_FS_QUOTA_TYPE:
199 {
200 unid_t qid;
201 qid.uid = DEFAULT_QUOTA_UID(handle);
202 ret = SMB_VFS_NEXT_SET_QUOTA(handle, SMB_USER_QUOTA_TYPE, qid, dq);
203 }
204 break;
205#ifdef HAVE_GROUP_QUOTA
206 case SMB_GROUP_FS_QUOTA_TYPE:
207 {
208 unid_t qid;
209 qid.gid = DEFAULT_QUOTA_GID(handle);
210 ret = SMB_VFS_NEXT_SET_QUOTA(handle, SMB_GROUP_QUOTA_TYPE, qid, dq);
211 }
212 break;
213#endif /* HAVE_GROUP_QUOTA */
214 default:
215 errno = ENOSYS;
216 return -1;
217 break;
218 }
219
220 return ret;
221}
222
223static struct vfs_fn_pointers vfs_default_quota_fns = {
224 .get_quota_fn = default_quota_get_quota,
225 .set_quota_fn = default_quota_set_quota
226};
227
228NTSTATUS vfs_default_quota_init(void);
229NTSTATUS vfs_default_quota_init(void)
230{
231 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, DEFAULT_QUOTA_NAME,
232 &vfs_default_quota_fns);
233}
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