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 }