lib/util: Remove dummy wrappers for setpwent/getpwent/endpwent.
[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 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 #include "includes.h"
21 #include "smbd/smbd.h"
22 #include "../lib/util/util_pw.h"
23 #include "system/passwd.h"
24 #include "passdb/lookup_sid.h"
25 #include "libsmb/libsmb.h"
26
27 #undef DBGC_CLASS
28 #define DBGC_CLASS DBGC_QUOTA
29
30 static uint64_t limit_nt2unix(uint64_t in, uint64_t bsize)
31 {
32         uint64_t ret = (uint64_t)0;
33
34         ret =   (uint64_t)(in/bsize);
35         if (in>0 && ret==0) {
36                 /* we have to make sure that a overflow didn't set NO_LIMIT */
37                 ret = (uint64_t)1;
38         }
39
40         if (in == SMB_NTQUOTAS_NO_LIMIT)
41                 ret = SMB_QUOTAS_NO_LIMIT;
42         else if (in == SMB_NTQUOTAS_NO_SPACE)
43                 ret = SMB_QUOTAS_NO_SPACE;
44         else if (in == SMB_NTQUOTAS_NO_ENTRY)
45                 ret = SMB_QUOTAS_NO_LIMIT;
46
47         return ret;
48 }
49
50 static uint64_t limit_unix2nt(uint64_t in, uint64_t bsize)
51 {
52         uint64_t ret = (uint64_t)0;
53
54         ret = (uint64_t)(in*bsize);
55         
56         if (ret < in) {
57                 /* we overflow */
58                 ret = SMB_NTQUOTAS_NO_LIMIT;
59         }
60
61         if (in == SMB_QUOTAS_NO_LIMIT)
62                 ret = SMB_NTQUOTAS_NO_LIMIT;
63
64         return ret;
65 }
66
67 static uint64_t limit_blk2inodes(uint64_t in)
68 {
69         uint64_t ret = (uint64_t)0;
70         
71         ret = (uint64_t)(in/2);
72         
73         if (ret == 0 && in != 0)
74                 ret = (uint64_t)1;
75
76         return ret;     
77 }
78
79 int vfs_get_ntquota(files_struct *fsp, enum SMB_QUOTA_TYPE qtype, struct dom_sid *psid, SMB_NTQUOTA_STRUCT *qt)
80 {
81         int ret;
82         SMB_DISK_QUOTA D;
83         unid_t id;
84
85         ZERO_STRUCT(D);
86
87         if (!fsp||!fsp->conn||!qt)
88                 return (-1);
89
90         ZERO_STRUCT(*qt);
91
92         id.uid = -1;
93
94         if (psid && !sid_to_uid(psid, &id.uid)) {
95                 DEBUG(0,("sid_to_uid: failed, SID[%s]\n",
96                          sid_string_dbg(psid)));
97         }
98
99         ret = SMB_VFS_GET_QUOTA(fsp->conn, qtype, id, &D);
100
101         if (psid)
102                 qt->sid    = *psid;
103
104         if (ret!=0) {
105                 return ret;
106         }
107                 
108         qt->usedspace = (uint64_t)D.curblocks*D.bsize;
109         qt->softlim = limit_unix2nt(D.softlimit, D.bsize);
110         qt->hardlim = limit_unix2nt(D.hardlimit, D.bsize);
111         qt->qflags = D.qflags;
112
113         
114         return 0;
115 }
116
117 int vfs_set_ntquota(files_struct *fsp, enum SMB_QUOTA_TYPE qtype, struct dom_sid *psid, SMB_NTQUOTA_STRUCT *qt)
118 {
119         int ret;
120         SMB_DISK_QUOTA D;
121         unid_t id;
122         ZERO_STRUCT(D);
123
124         if (!fsp||!fsp->conn||!qt)
125                 return (-1);
126
127         id.uid = -1;
128
129         D.bsize     = (uint64_t)QUOTABLOCK_SIZE;
130
131         D.softlimit = limit_nt2unix(qt->softlim,D.bsize);
132         D.hardlimit = limit_nt2unix(qt->hardlim,D.bsize);
133         D.qflags     = qt->qflags;
134
135         D.isoftlimit = limit_blk2inodes(D.softlimit);
136         D.ihardlimit = limit_blk2inodes(D.hardlimit);
137
138         if (psid && !sid_to_uid(psid, &id.uid)) {
139                 DEBUG(0,("sid_to_uid: failed, SID[%s]\n",
140                          sid_string_dbg(psid)));
141         }
142
143         ret = SMB_VFS_SET_QUOTA(fsp->conn, qtype, id, &D);
144         
145         return ret;
146 }
147
148 static bool allready_in_quota_list(SMB_NTQUOTA_LIST *qt_list, uid_t uid)
149 {
150         SMB_NTQUOTA_LIST *tmp_list = NULL;
151         
152         if (!qt_list)
153                 return False;
154
155         for (tmp_list=qt_list;tmp_list!=NULL;tmp_list=tmp_list->next) {
156                 if (tmp_list->uid == uid) {
157                         return True;    
158                 }
159         }
160
161         return False;
162 }
163
164 int vfs_get_user_ntquota_list(files_struct *fsp, SMB_NTQUOTA_LIST **qt_list)
165 {
166         struct passwd *usr;
167         TALLOC_CTX *mem_ctx = NULL;
168
169         if (!fsp||!fsp->conn||!qt_list)
170                 return (-1);
171
172         *qt_list = NULL;
173
174         if ((mem_ctx=talloc_init("SMB_USER_QUOTA_LIST"))==NULL) {
175                 DEBUG(0,("talloc_init() failed\n"));
176                 return (-1);
177         }
178
179         setpwent();
180         while ((usr = getpwent()) != NULL) {
181                 SMB_NTQUOTA_STRUCT tmp_qt;
182                 SMB_NTQUOTA_LIST *tmp_list_ent;
183                 struct dom_sid  sid;
184
185                 ZERO_STRUCT(tmp_qt);
186
187                 if (allready_in_quota_list((*qt_list),usr->pw_uid)) {
188                         DEBUG(5,("record for uid[%ld] allready in the list\n",(long)usr->pw_uid));
189                         continue;
190                 }
191
192                 uid_to_sid(&sid, usr->pw_uid);
193
194                 if (vfs_get_ntquota(fsp, SMB_USER_QUOTA_TYPE, &sid, &tmp_qt)!=0) {
195                         DEBUG(5,("no quota entry for sid[%s] path[%s]\n",
196                                  sid_string_dbg(&sid),
197                                  fsp->conn->connectpath));
198                         continue;
199                 }
200
201                 DEBUG(15,("quota entry for id[%s] path[%s]\n",
202                           sid_string_dbg(&sid), fsp->conn->connectpath));
203
204                 if ((tmp_list_ent=talloc_zero(mem_ctx,SMB_NTQUOTA_LIST))==NULL) {
205                         DEBUG(0,("TALLOC_ZERO() failed\n"));
206                         *qt_list = NULL;
207                         talloc_destroy(mem_ctx);
208                         return (-1);
209                 }
210
211                 if ((tmp_list_ent->quotas=talloc_zero(mem_ctx,SMB_NTQUOTA_STRUCT))==NULL) {
212                         DEBUG(0,("TALLOC_ZERO() failed\n"));
213                         *qt_list = NULL;
214                         talloc_destroy(mem_ctx);
215                         return (-1);
216                 }
217
218                 tmp_list_ent->uid = usr->pw_uid;
219                 memcpy(tmp_list_ent->quotas,&tmp_qt,sizeof(tmp_qt));
220                 tmp_list_ent->mem_ctx = mem_ctx;
221
222                 DLIST_ADD((*qt_list),tmp_list_ent);
223                 
224         }
225         endpwent();
226
227         return 0;
228 }
229
230 static int quota_handle_destructor(SMB_NTQUOTA_HANDLE *handle)
231 {
232         if (handle->quota_list)
233                 free_ntquota_list(&handle->quota_list);
234         return 0;
235 }
236
237 void *init_quota_handle(TALLOC_CTX *mem_ctx)
238 {
239         SMB_NTQUOTA_HANDLE *qt_handle;
240
241         if (!mem_ctx)
242                 return NULL;
243
244         qt_handle = talloc_zero(mem_ctx,SMB_NTQUOTA_HANDLE);
245         if (qt_handle==NULL) {
246                 DEBUG(0,("TALLOC_ZERO() failed\n"));
247                 return NULL;
248         }
249
250         talloc_set_destructor(qt_handle, quota_handle_destructor);
251         return (void *)qt_handle;
252 }