source3/lib/sysquotas_linux.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    System QUOTA function wrappers for LINUX
   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
  21 #include "includes.h"
  22
  23 #undef DBGC_CLASS
  24 #define DBGC_CLASS DBGC_QUOTA
  25
  26 #ifndef HAVE_SYS_QUOTAS
  27 #ifdef HAVE_QUOTACTL_LINUX
  28 #undef HAVE_QUOTACTL_LINUX
  29 #endif
  30 #endif
  31
  32 #ifdef HAVE_QUOTACTL_LINUX
  33
  34 #include <sys/quota.h>
  35
  36 /****************************************************************************
  37  Linux quota get calls.
  38 ****************************************************************************/
  39 int sys_get_vfs_quota(const char *path, const char *bdev,
  40                       enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
  41 {
  42         int ret = -1;
  43         uint32_t qflags = 0;
  44         struct dqblk D;
  45         uint64_t bsize = (uint64_t)QUOTABLOCK_SIZE;
  46
  47         if (!path || !bdev || !dp) {
  48                 smb_panic("sys_get_vfs_quota: called with NULL pointer");
  49         }
  50
  51         ZERO_STRUCT(*dp);
  52         dp->qtype = qtype;
  53
  54         ZERO_STRUCT(D);
  55
  56         switch (qtype) {
  57                 case SMB_USER_QUOTA_TYPE:
  58                         DEBUG(10, ("sys_get_vfs_quota: path[%s] bdev[%s] "
  59                                    "SMB_USER_QUOTA_TYPE uid[%u]\n",
  60                                    path, bdev, (unsigned)id.uid));
  61
  62                         if ((ret = quotactl(QCMD(Q_GETQUOTA, USRQUOTA), bdev,
  63                                             id.uid, (caddr_t)&D))) {
  64                                 return ret;
  65                         }
  66
  67                         break;
  68                 case SMB_GROUP_QUOTA_TYPE:
  69                         DEBUG(10, ("sys_get_vfs_quota: path[%s] bdev[%s] "
  70                                    "SMB_GROUP_QUOTA_TYPE gid[%u]\n",
  71                                    path, bdev, (unsigned)id.gid));
  72
  73                         if ((ret = quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), bdev,
  74                                             id.gid, (caddr_t)&D))) {
  75                                 return ret;
  76                         }
  77
  78                         break;
  79                 case SMB_USER_FS_QUOTA_TYPE:
  80                         DEBUG(10, ("sys_get_vfs_quota: path[%s] bdev[%s] "
  81                                    "SMB_USER_FS_QUOTA_TYPE (uid[%u])\n",
  82                                    path, bdev, (unsigned)geteuid()));
  83
  84                         if ((ret = quotactl(QCMD(Q_GETQUOTA, USRQUOTA), bdev,
  85                                             geteuid(), (caddr_t)&D)) == 0) {
  86                                 qflags |= QUOTAS_DENY_DISK;
  87                         }
  88
  89                         ret = 0;
  90
  91                         break;
  92                 case SMB_GROUP_FS_QUOTA_TYPE:
  93                         DEBUG(10, ("sys_get_vfs_quota: path[%s] bdev[%s] "
  94                                    "SMB_GROUP_FS_QUOTA_TYPE (gid[%u])\n",
  95                                    path, bdev, (unsigned)getegid()));
  96
  97                         if ((ret = quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), bdev,
  98                                             getegid(), (caddr_t)&D)) == 0) {
  99                                 qflags |= QUOTAS_DENY_DISK;
 100                         }
 101
 102                         ret = 0;
 103                         break;
 104                 default:
 105                         errno = ENOSYS;
 106                         return -1;
 107         }
 108
 109         dp->bsize = bsize;
 110         dp->softlimit = (uint64_t)D.dqb_bsoftlimit;
 111         dp->hardlimit = (uint64_t)D.dqb_bhardlimit;
 112         dp->ihardlimit = (uint64_t)D.dqb_ihardlimit;
 113         dp->isoftlimit = (uint64_t)D.dqb_isoftlimit;
 114         dp->curinodes = (uint64_t)D.dqb_curinodes;
 115         dp->curblocks = (uint64_t)D.dqb_curspace/bsize;
 116
 117
 118         dp->qflags = qflags;
 119
 120         return ret;
 121 }
 122
 123 /****************************************************************************
 124  Linux quota set calls.
 125 ****************************************************************************/
 126 int sys_set_vfs_quota(const char *path, const char *bdev,
 127                       enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *dp)
 128 {
 129         int ret = -1;
 130         struct dqblk D;
 131         uint64_t bsize = (uint64_t)QUOTABLOCK_SIZE;
 132         bool cur_enf, new_enf;
 133
 134         if (!path || !bdev || !dp) {
 135                 smb_panic("sys_set_vfs_quota: called with NULL pointer");
 136         }
 137
 138         ZERO_STRUCT(D);
 139
 140         if (bsize == dp->bsize) {
 141                 D.dqb_bsoftlimit = dp->softlimit;
 142                 D.dqb_bhardlimit = dp->hardlimit;
 143         } else {
 144                 D.dqb_bsoftlimit = (dp->softlimit*dp->bsize)/bsize;
 145                 D.dqb_bhardlimit = (dp->hardlimit*dp->bsize)/bsize;
 146         }
 147         D.dqb_ihardlimit = dp->ihardlimit;
 148         D.dqb_isoftlimit = dp->isoftlimit;
 149         D.dqb_valid = QIF_LIMITS;
 150
 151         switch (qtype) {
 152                 case SMB_USER_QUOTA_TYPE:
 153                         DEBUG(10, ("sys_set_vfs_quota: path[%s] bdev[%s] "
 154                                    "SMB_USER_QUOTA_TYPE uid[%u]\n",
 155                                    path, bdev, (unsigned)id.uid));
 156
 157                         ret = quotactl(QCMD(Q_SETQUOTA,USRQUOTA), bdev, id.uid, (caddr_t)&D);
 158                         break;
 159                 case SMB_GROUP_QUOTA_TYPE:
 160                         DEBUG(10, ("sys_set_vfs_quota: path[%s] bdev[%s] "
 161                                    "SMB_GROUP_QUOTA_TYPE gid[%u]\n",
 162                                    path, bdev, (unsigned)id.gid));
 163
 164                         ret = quotactl(QCMD(Q_SETQUOTA,GRPQUOTA), bdev, id.gid, (caddr_t)&D);
 165                         break;
 166                 case SMB_USER_FS_QUOTA_TYPE:
 167                         DEBUG(10, ("sys_set_vfs_quota: path[%s] bdev[%s] "
 168                                    "SMB_USER_FS_QUOTA_TYPE (uid[%u])\n",
 169                                    path, bdev, (unsigned)geteuid()));
 170
 171                         ret = quotactl(QCMD(Q_GETQUOTA, USRQUOTA), bdev,
 172                                        geteuid(), (caddr_t)&D);
 173                         cur_enf = (ret == 0);
 174                         new_enf = ((dp->qflags & QUOTAS_DENY_DISK) != 0);
 175                         /* We're not changing quota enforcement, so return
 176                          * success
 177                          * IFF the wanted state is identical to the current
 178                          * state */
 179                         if (cur_enf == new_enf) {
 180                                 ret = 0;
 181                         } else {
 182                                 errno = EPERM;
 183                                 ret = -1;
 184                         }
 185
 186                         break;
 187                 case SMB_GROUP_FS_QUOTA_TYPE:
 188                         DEBUG(10, ("sys_set_vfs_quota: path[%s] bdev[%s] "
 189                                    "SMB_GROUP_FS_QUOTA_TYPE (gid[%u])\n",
 190                                    path, bdev, (unsigned)getegid()));
 191
 192                         ret = quotactl(QCMD(Q_GETQUOTA, GRPQUOTA), bdev,
 193                                        getegid(), (caddr_t)&D);
 194                         cur_enf = (ret == 0);
 195                         new_enf = ((dp->qflags & QUOTAS_DENY_DISK) != 0);
 196                         /* We're not changing quota enforcement, so return
 197                          * success
 198                          * IFF the wanted state is identical to the current
 199                          * state */
 200                         if (cur_enf == new_enf) {
 201                                 ret = 0;
 202                         } else {
 203                                 errno = EPERM;
 204                                 ret = -1;
 205                         }
 206
 207                         break;
 208                 default:
 209                         errno = ENOSYS;
 210                         return -1;
 211         }
 212
 213         return ret;
 214 }
 215
 216 #else /* HAVE_QUOTACTL_LINUX */
 217  void dummy_sysquotas_linux(void);
 218
 219  void dummy_sysquotas_linux(void){}
 220 #endif /* HAVE_QUOTACTL_LINUX */