Add NT quota support. Patch from Stefan (metze) Metzemacher
[nivanova/samba-autobuild/.git] / source3 / smbd / ntquotas.c
1 /* 
2    Unix SMB/CIFS implementation.
3    NT QUOTA suppport
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 2 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, write to the Free Software
18    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21 #include "includes.h"
22
23 static SMB_BIG_UINT limit_nt2unix(SMB_BIG_UINT in, SMB_BIG_UINT bsize)
24 {
25         SMB_BIG_UINT ret = (SMB_BIG_UINT)0;
26
27         ret =   (SMB_BIG_UINT)(in/bsize);
28         if (in>0 && ret==0) {
29                 /* we have to make sure that a overflow didn't set NO_LIMIT */
30                 ret = (SMB_BIG_UINT)1;
31         }
32
33         if (in == SMB_NTQUOTAS_NO_LIMIT)
34                 ret = SMB_QUOTAS_NO_LIMIT;
35         else if (in == SMB_NTQUOTAS_NO_SPACE)
36                 ret = SMB_QUOTAS_NO_SPACE;
37         else if (in == SMB_NTQUOTAS_NO_ENTRY)
38                 ret = SMB_QUOTAS_NO_LIMIT;
39
40         return ret;
41 }
42
43 static SMB_BIG_UINT limit_unix2nt(SMB_BIG_UINT in, SMB_BIG_UINT bsize)
44 {
45         SMB_BIG_UINT ret = (SMB_BIG_UINT)0;
46
47         ret = (SMB_BIG_UINT)(in*bsize);
48         
49         if (ret < in) {
50                 /* we overflow */
51                 ret = SMB_NTQUOTAS_NO_LIMIT;
52         }
53
54         if (in == SMB_QUOTAS_NO_LIMIT)
55                 ret = SMB_NTQUOTAS_NO_LIMIT;
56
57         return ret;
58 }
59
60 static SMB_BIG_UINT limit_blk2inodes(SMB_BIG_UINT in)
61 {
62         SMB_BIG_UINT ret = (SMB_BIG_UINT)0;
63         
64         ret = (SMB_BIG_UINT)(in/2);
65         
66         if (ret == 0 && in != 0)
67                 ret = (SMB_BIG_UINT)1;
68
69         return ret;     
70 }
71
72 int vfs_get_ntquota(files_struct *fsp, enum SMB_QUOTA_TYPE qtype, DOM_SID *psid, SMB_NTQUOTA_STRUCT *qt)
73 {
74         int ret;
75         SMB_DISK_QUOTA D;
76         unid_t id;
77         enum SID_NAME_USE sid_use = SID_NAME_USE_NONE;
78
79         ZERO_STRUCT(D);
80
81         if (!fsp||!fsp->conn||!qt)
82                 return (-1);
83
84         ZERO_STRUCT(*qt);
85
86         id.uid = -1;
87
88         if (psid && !sid_to_uid(psid, &id.uid, &sid_use)) {
89                 DEBUG(0,("sid_to_uid: failed, SID[%s]\n",
90                         sid_string_static(psid)));      
91         }
92
93         ret = VFS_GET_QUOTA(fsp->conn, qtype, id, &D);
94
95         if (psid)
96                 qt->sid    = *psid;
97
98         if (ret!=0) {
99                 return ret;
100         }
101                 
102         qt->usedspace = (SMB_BIG_UINT)D.curblocks*D.bsize;
103         qt->softlim = limit_unix2nt(D.softlimit, D.bsize);
104         qt->hardlim = limit_unix2nt(D.hardlimit, D.bsize);
105         qt->qflags = D.qflags;
106
107         
108         return 0;
109 }
110
111 int vfs_set_ntquota(files_struct *fsp, enum SMB_QUOTA_TYPE qtype, DOM_SID *psid, SMB_NTQUOTA_STRUCT *qt)
112 {
113         int ret;
114         SMB_DISK_QUOTA D;
115         unid_t id;
116         enum SID_NAME_USE sid_use = SID_NAME_USE_NONE;
117         ZERO_STRUCT(D);
118
119         if (!fsp||!fsp->conn||!qt)
120                 return (-1);
121
122         id.uid = -1;
123
124         D.bsize     = (SMB_BIG_UINT)QUOTABLOCK_SIZE;
125         D.softlimit = limit_nt2unix(qt->softlim,D.bsize);
126         D.hardlimit = limit_nt2unix(qt->hardlim,D.bsize);
127         D.qflags     = qt->qflags;
128
129         D.isoftlimit = limit_blk2inodes(D.softlimit);
130         D.ihardlimit = limit_blk2inodes(D.hardlimit);
131
132         if (psid && !sid_to_uid(psid, &id.uid, &sid_use)) {
133                 DEBUG(0,("sid_to_uid: failed, SID[%s]\n",
134                         sid_string_static(psid)));      
135         }
136
137         ret = VFS_SET_QUOTA(fsp->conn, qtype, id, &D);
138         
139         return ret;
140 }
141
142 static BOOL allready_in_quota_list(SMB_NTQUOTA_LIST *qt_list, uid_t uid)
143 {
144         SMB_NTQUOTA_LIST *tmp_list = NULL;
145         
146         if (!qt_list)
147                 return False;
148
149         for (tmp_list=qt_list;tmp_list!=NULL;tmp_list=tmp_list->next) {
150                 if (tmp_list->uid == uid) {
151                         return True;    
152                 }
153         }
154
155         return False;
156 }
157
158 int vfs_get_user_ntquota_list(files_struct *fsp, SMB_NTQUOTA_LIST **qt_list)
159 {
160         struct passwd *usr;
161         TALLOC_CTX *mem_ctx = NULL;
162
163         if (!fsp||!fsp->conn||!qt_list)
164                 return (-1);
165
166         *qt_list = NULL;
167
168         if ((mem_ctx=talloc_init("SMB_USER_QUOTA_LIST"))==NULL) {
169                 DEBUG(0,("talloc_init() failed\n"));
170                 return (-1);
171         }
172
173         sys_setpwent();
174         while ((usr = sys_getpwent()) != NULL) {
175                 SMB_NTQUOTA_STRUCT tmp_qt;
176                 SMB_NTQUOTA_LIST *tmp_list_ent;
177                 DOM_SID sid;
178
179                 ZERO_STRUCT(tmp_qt);
180
181                 if (allready_in_quota_list((*qt_list),usr->pw_uid)) {
182                         DEBUG(5,("record for uid[%d] allready in the list\n",usr->pw_uid));
183                         continue;
184                 }
185
186                 if (uid_to_sid(&sid,usr->pw_uid)==NULL) {
187                         DEBUG(0,("uid_to_sid failed for %d\n",usr->pw_uid));
188                         continue;
189                 }
190
191                 if (vfs_get_ntquota(fsp, SMB_USER_QUOTA_TYPE, &sid, &tmp_qt)!=0) {
192                         DEBUG(1,("no quota entry for sid[%s] path[%s]\n",
193                                 sid_string_static(&sid),fsp->conn->connectpath));
194                         continue;
195                 }
196
197                 DEBUG(15,("quota entry for id[%s] path[%s]\n",
198                         sid_string_static(&sid),fsp->conn->connectpath));
199
200                 if ((tmp_list_ent=(SMB_NTQUOTA_LIST *)talloc_zero(mem_ctx,sizeof(SMB_NTQUOTA_LIST)))==NULL) {
201                         DEBUG(0,("talloc_zero() failed\n"));
202                         *qt_list = NULL;
203                         talloc_destroy(mem_ctx);
204                         return (-1);
205                 }
206
207                 if ((tmp_list_ent->quotas=(SMB_NTQUOTA_STRUCT *)talloc_zero(mem_ctx,sizeof(SMB_NTQUOTA_STRUCT)))==NULL) {
208                         DEBUG(0,("talloc_zero() failed\n"));
209                         *qt_list = NULL;
210                         talloc_destroy(mem_ctx);
211                         return (-1);
212                 }
213
214                 tmp_list_ent->uid = usr->pw_uid;
215                 memcpy(tmp_list_ent->quotas,&tmp_qt,sizeof(tmp_qt));
216                 tmp_list_ent->mem_ctx = mem_ctx;
217
218                 DLIST_ADD((*qt_list),tmp_list_ent);
219                 
220         }
221         sys_endpwent();
222
223         return 0;
224 }
225
226 void *init_quota_handle(TALLOC_CTX *mem_ctx)
227 {
228         SMB_NTQUOTA_HANDLE *qt_handle;
229
230         if (!mem_ctx)
231                 return False;
232
233         qt_handle = (SMB_NTQUOTA_HANDLE *)talloc_zero(mem_ctx,sizeof(SMB_NTQUOTA_HANDLE));
234         if (qt_handle==NULL) {
235                 DEBUG(0,("talloc_zero() failed\n"));
236                 return NULL;
237         }
238
239         return (void *)qt_handle;       
240 }
241
242 void destroy_quota_handle(void **pqt_handle)
243 {
244         SMB_NTQUOTA_HANDLE *qt_handle = NULL;
245         if (!pqt_handle||!(*pqt_handle))
246                 return;
247         
248         qt_handle = (*pqt_handle);
249         
250         
251         if (qt_handle->quota_list)
252                 free_ntquota_list(&qt_handle->quota_list);
253
254         qt_handle->quota_list = NULL;
255         qt_handle->tmp_list = NULL;
256         qt_handle = NULL;
257
258         return;
259 }