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