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