fs/xfs/xfs_quotaops.c

   1 /*
   2  * Copyright (c) 2008, Christoph Hellwig
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #include "xfs.h"
  19 #include "xfs_format.h"
  20 #include "xfs_log_format.h"
  21 #include "xfs_trans_resv.h"
  22 #include "xfs_mount.h"
  23 #include "xfs_inode.h"
  24 #include "xfs_quota.h"
  25 #include "xfs_trans.h"
  26 #include "xfs_qm.h"
  27 #include <linux/quota.h>
  28
  29
  30 STATIC int
  31 xfs_quota_type(int type)
  32 {
  33         switch (type) {
  34         case USRQUOTA:
  35                 return XFS_DQ_USER;
  36         case GRPQUOTA:
  37                 return XFS_DQ_GROUP;
  38         default:
  39                 return XFS_DQ_PROJ;
  40         }
  41 }
  42
  43 STATIC int
  44 xfs_fs_get_xstate(
  45         struct super_block      *sb,
  46         struct fs_quota_stat    *fqs)
  47 {
  48         struct xfs_mount        *mp = XFS_M(sb);
  49
  50         if (!XFS_IS_QUOTA_RUNNING(mp))
  51                 return -ENOSYS;
  52         return xfs_qm_scall_getqstat(mp, fqs);
  53 }
  54
  55 STATIC int
  56 xfs_fs_get_xstatev(
  57         struct super_block      *sb,
  58         struct fs_quota_statv   *fqs)
  59 {
  60         struct xfs_mount        *mp = XFS_M(sb);
  61
  62         if (!XFS_IS_QUOTA_RUNNING(mp))
  63                 return -ENOSYS;
  64         return xfs_qm_scall_getqstatv(mp, fqs);
  65 }
  66
  67 STATIC int
  68 xfs_fs_set_xstate(
  69         struct super_block      *sb,
  70         unsigned int            uflags,
  71         int                     op)
  72 {
  73         struct xfs_mount        *mp = XFS_M(sb);
  74         unsigned int            flags = 0;
  75
  76         if (sb->s_flags & MS_RDONLY)
  77                 return -EROFS;
  78         if (op != Q_XQUOTARM && !XFS_IS_QUOTA_RUNNING(mp))
  79                 return -ENOSYS;
  80
  81         if (uflags & FS_QUOTA_UDQ_ACCT)
  82                 flags |= XFS_UQUOTA_ACCT;
  83         if (uflags & FS_QUOTA_PDQ_ACCT)
  84                 flags |= XFS_PQUOTA_ACCT;
  85         if (uflags & FS_QUOTA_GDQ_ACCT)
  86                 flags |= XFS_GQUOTA_ACCT;
  87         if (uflags & FS_QUOTA_UDQ_ENFD)
  88                 flags |= XFS_UQUOTA_ENFD;
  89         if (uflags & FS_QUOTA_GDQ_ENFD)
  90                 flags |= XFS_GQUOTA_ENFD;
  91         if (uflags & FS_QUOTA_PDQ_ENFD)
  92                 flags |= XFS_PQUOTA_ENFD;
  93
  94         switch (op) {
  95         case Q_XQUOTAON:
  96                 return xfs_qm_scall_quotaon(mp, flags);
  97         case Q_XQUOTAOFF:
  98                 if (!XFS_IS_QUOTA_ON(mp))
  99                         return -EINVAL;
 100                 return xfs_qm_scall_quotaoff(mp, flags);
 101         }
 102
 103         return -EINVAL;
 104 }
 105
 106 STATIC int
 107 xfs_fs_rm_xquota(
 108         struct super_block      *sb,
 109         unsigned int            uflags)
 110 {
 111         struct xfs_mount        *mp = XFS_M(sb);
 112         unsigned int            flags = 0;
 113
 114         if (sb->s_flags & MS_RDONLY)
 115                 return -EROFS;
 116
 117         if (XFS_IS_QUOTA_ON(mp))
 118                 return -EINVAL;
 119
 120         if (uflags & FS_USER_QUOTA)
 121                 flags |= XFS_DQ_USER;
 122         if (uflags & FS_GROUP_QUOTA)
 123                 flags |= XFS_DQ_GROUP;
 124         if (uflags & FS_PROJ_QUOTA)
 125                 flags |= XFS_DQ_PROJ;
 126
 127         return xfs_qm_scall_trunc_qfiles(mp, flags);
 128 }
 129
 130 STATIC int
 131 xfs_fs_get_dqblk(
 132         struct super_block      *sb,
 133         struct kqid             qid,
 134         struct fs_disk_quota    *fdq)
 135 {
 136         struct xfs_mount        *mp = XFS_M(sb);
 137
 138         if (!XFS_IS_QUOTA_RUNNING(mp))
 139                 return -ENOSYS;
 140         if (!XFS_IS_QUOTA_ON(mp))
 141                 return -ESRCH;
 142
 143         return xfs_qm_scall_getquota(mp, from_kqid(&init_user_ns, qid),
 144                                       xfs_quota_type(qid.type), fdq);
 145 }
 146
 147 STATIC int
 148 xfs_fs_set_dqblk(
 149         struct super_block      *sb,
 150         struct kqid             qid,
 151         struct fs_disk_quota    *fdq)
 152 {
 153         struct xfs_mount        *mp = XFS_M(sb);
 154
 155         if (sb->s_flags & MS_RDONLY)
 156                 return -EROFS;
 157         if (!XFS_IS_QUOTA_RUNNING(mp))
 158                 return -ENOSYS;
 159         if (!XFS_IS_QUOTA_ON(mp))
 160                 return -ESRCH;
 161
 162         return xfs_qm_scall_setqlim(mp, from_kqid(&init_user_ns, qid),
 163                                      xfs_quota_type(qid.type), fdq);
 164 }
 165
 166 const struct quotactl_ops xfs_quotactl_operations = {
 167         .get_xstatev            = xfs_fs_get_xstatev,
 168         .get_xstate             = xfs_fs_get_xstate,
 169         .set_xstate             = xfs_fs_set_xstate,
 170         .rm_xquota              = xfs_fs_rm_xquota,
 171         .get_dqblk              = xfs_fs_get_dqblk,
 172         .set_dqblk              = xfs_fs_set_dqblk,
 173 };