Line data Source code
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 :
95 0 : static int default_quota_get_quota(vfs_handle_struct *handle,
96 : const struct smb_filename *smb_fname,
97 : enum SMB_QUOTA_TYPE qtype,
98 : unid_t id,
99 : SMB_DISK_QUOTA *dq)
100 : {
101 0 : int ret = -1;
102 :
103 0 : if ((ret = SMB_VFS_NEXT_GET_QUOTA(handle, smb_fname,
104 : qtype, id, dq)) != 0) {
105 0 : return ret;
106 : }
107 :
108 0 : switch (qtype) {
109 0 : case SMB_USER_QUOTA_TYPE:
110 : /* we use id.uid == 0 for default quotas */
111 0 : if ((id.uid==DEFAULT_QUOTA_UID(handle)) &&
112 0 : DEFAULT_QUOTA_UID_NOLIMIT(handle)) {
113 0 : SMB_QUOTAS_SET_NO_LIMIT(dq);
114 : }
115 0 : break;
116 : #ifdef HAVE_GROUP_QUOTA
117 : case SMB_GROUP_QUOTA_TYPE:
118 : /* we use id.gid == 0 for default quotas */
119 : if ((id.gid==DEFAULT_QUOTA_GID(handle)) &&
120 : DEFAULT_QUOTA_GID_NOLIMIT(handle)) {
121 : SMB_QUOTAS_SET_NO_LIMIT(dq);
122 : }
123 : break;
124 : #endif /* HAVE_GROUP_QUOTA */
125 0 : case SMB_USER_FS_QUOTA_TYPE:
126 : {
127 : unid_t qid;
128 0 : uint32_t qflags = dq->qflags;
129 0 : qid.uid = DEFAULT_QUOTA_UID(handle);
130 0 : SMB_VFS_NEXT_GET_QUOTA(handle, smb_fname,
131 : SMB_USER_QUOTA_TYPE, qid, dq);
132 0 : dq->qflags = qflags;
133 : }
134 0 : break;
135 : #ifdef HAVE_GROUP_QUOTA
136 : case SMB_GROUP_FS_QUOTA_TYPE:
137 : {
138 : unid_t qid;
139 : uint32_t qflags = dq->qflags;
140 : qid.gid = DEFAULT_QUOTA_GID(handle);
141 : SMB_VFS_NEXT_GET_QUOTA(handle, smb_fname,
142 : SMB_GROUP_QUOTA_TYPE,
143 : qid, dq);
144 : dq->qflags = qflags;
145 : }
146 : break;
147 : #endif /* HAVE_GROUP_QUOTA */
148 0 : default:
149 0 : errno = ENOSYS;
150 0 : return -1;
151 : break;
152 : }
153 :
154 0 : return ret;
155 : }
156 :
157 0 : static int default_quota_set_quota(vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dq)
158 : {
159 0 : int ret = -1;
160 :
161 0 : switch (qtype) {
162 0 : case SMB_USER_QUOTA_TYPE:
163 : /* we use id.uid == 0 for default quotas */
164 0 : if ((id.uid==DEFAULT_QUOTA_UID(handle)) &&
165 0 : DEFAULT_QUOTA_UID_NOLIMIT(handle)) {
166 0 : return -1;
167 : }
168 0 : break;
169 : #ifdef HAVE_GROUP_QUOTA
170 : case SMB_GROUP_QUOTA_TYPE:
171 : /* we use id.gid == 0 for default quotas */
172 : if ((id.gid==DEFAULT_QUOTA_GID(handle)) &&
173 : DEFAULT_QUOTA_GID_NOLIMIT(handle)) {
174 : return -1;
175 : }
176 : break;
177 : #endif /* HAVE_GROUP_QUOTA */
178 0 : case SMB_USER_FS_QUOTA_TYPE:
179 0 : break;
180 : #ifdef HAVE_GROUP_QUOTA
181 : case SMB_GROUP_FS_QUOTA_TYPE:
182 : break;
183 : #endif /* HAVE_GROUP_QUOTA */
184 0 : default:
185 0 : errno = ENOSYS;
186 0 : return -1;
187 : break;
188 : }
189 :
190 0 : if ((ret=SMB_VFS_NEXT_SET_QUOTA(handle, qtype, id, dq))!=0) {
191 0 : return ret;
192 : }
193 :
194 0 : switch (qtype) {
195 0 : case SMB_USER_QUOTA_TYPE:
196 0 : break;
197 : #ifdef HAVE_GROUP_QUOTA
198 : case SMB_GROUP_QUOTA_TYPE:
199 : break;
200 : #endif /* HAVE_GROUP_QUOTA */
201 0 : case SMB_USER_FS_QUOTA_TYPE:
202 : {
203 : unid_t qid;
204 0 : qid.uid = DEFAULT_QUOTA_UID(handle);
205 0 : ret = SMB_VFS_NEXT_SET_QUOTA(handle, SMB_USER_QUOTA_TYPE, qid, dq);
206 : }
207 0 : break;
208 : #ifdef HAVE_GROUP_QUOTA
209 : case SMB_GROUP_FS_QUOTA_TYPE:
210 : {
211 : unid_t qid;
212 : qid.gid = DEFAULT_QUOTA_GID(handle);
213 : ret = SMB_VFS_NEXT_SET_QUOTA(handle, SMB_GROUP_QUOTA_TYPE, qid, dq);
214 : }
215 : break;
216 : #endif /* HAVE_GROUP_QUOTA */
217 0 : default:
218 0 : errno = ENOSYS;
219 0 : return -1;
220 : break;
221 : }
222 :
223 0 : return ret;
224 : }
225 :
226 : static struct vfs_fn_pointers vfs_default_quota_fns = {
227 : .get_quota_fn = default_quota_get_quota,
228 : .set_quota_fn = default_quota_set_quota
229 : };
230 :
231 : static_decl_vfs;
232 27 : NTSTATUS vfs_default_quota_init(TALLOC_CTX *ctx)
233 : {
234 27 : return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, DEFAULT_QUOTA_NAME,
235 : &vfs_default_quota_fns);
236 : }
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