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 unsigned int
  68 xfs_quota_flags(unsigned int uflags)
  69 {
  70         unsigned int flags = 0;
  71
  72         if (uflags & FS_QUOTA_UDQ_ACCT)
  73                 flags |= XFS_UQUOTA_ACCT;
  74         if (uflags & FS_QUOTA_PDQ_ACCT)
  75                 flags |= XFS_PQUOTA_ACCT;
  76         if (uflags & FS_QUOTA_GDQ_ACCT)
  77                 flags |= XFS_GQUOTA_ACCT;
  78         if (uflags & FS_QUOTA_UDQ_ENFD)
  79                 flags |= XFS_UQUOTA_ENFD;
  80         if (uflags & FS_QUOTA_GDQ_ENFD)
  81                 flags |= XFS_GQUOTA_ENFD;
  82         if (uflags & FS_QUOTA_PDQ_ENFD)
  83                 flags |= XFS_PQUOTA_ENFD;
  84
  85         return flags;
  86 }
  87
  88 STATIC int
  89 xfs_quota_enable(
  90         struct super_block      *sb,
  91         unsigned int            uflags)
  92 {
  93         struct xfs_mount        *mp = XFS_M(sb);
  94
  95         if (sb->s_flags & MS_RDONLY)
  96                 return -EROFS;
  97         if (!XFS_IS_QUOTA_RUNNING(mp))
  98                 return -ENOSYS;
  99
 100         return xfs_qm_scall_quotaon(mp, xfs_quota_flags(uflags));
 101 }
 102
 103 STATIC int
 104 xfs_quota_disable(
 105         struct super_block      *sb,
 106         unsigned int            uflags)
 107 {
 108         struct xfs_mount        *mp = XFS_M(sb);
 109
 110         if (sb->s_flags & MS_RDONLY)
 111                 return -EROFS;
 112         if (!XFS_IS_QUOTA_RUNNING(mp))
 113                 return -ENOSYS;
 114         if (!XFS_IS_QUOTA_ON(mp))
 115                 return -EINVAL;
 116
 117         return xfs_qm_scall_quotaoff(mp, xfs_quota_flags(uflags));
 118 }
 119
 120 STATIC int
 121 xfs_fs_rm_xquota(
 122         struct super_block      *sb,
 123         unsigned int            uflags)
 124 {
 125         struct xfs_mount        *mp = XFS_M(sb);
 126         unsigned int            flags = 0;
 127
 128         if (sb->s_flags & MS_RDONLY)
 129                 return -EROFS;
 130
 131         if (XFS_IS_QUOTA_ON(mp))
 132                 return -EINVAL;
 133
 134         if (uflags & FS_USER_QUOTA)
 135                 flags |= XFS_DQ_USER;
 136         if (uflags & FS_GROUP_QUOTA)
 137                 flags |= XFS_DQ_GROUP;
 138         if (uflags & FS_PROJ_QUOTA)
 139                 flags |= XFS_DQ_PROJ;
 140
 141         return xfs_qm_scall_trunc_qfiles(mp, flags);
 142 }
 143
 144 STATIC int
 145 xfs_fs_get_dqblk(
 146         struct super_block      *sb,
 147         struct kqid             qid,
 148         struct qc_dqblk         *qdq)
 149 {
 150         struct xfs_mount        *mp = XFS_M(sb);
 151
 152         if (!XFS_IS_QUOTA_RUNNING(mp))
 153                 return -ENOSYS;
 154         if (!XFS_IS_QUOTA_ON(mp))
 155                 return -ESRCH;
 156
 157         return xfs_qm_scall_getquota(mp, from_kqid(&init_user_ns, qid),
 158                                       xfs_quota_type(qid.type), qdq);
 159 }
 160
 161 STATIC int
 162 xfs_fs_set_dqblk(
 163         struct super_block      *sb,
 164         struct kqid             qid,
 165         struct qc_dqblk         *qdq)
 166 {
 167         struct xfs_mount        *mp = XFS_M(sb);
 168
 169         if (sb->s_flags & MS_RDONLY)
 170                 return -EROFS;
 171         if (!XFS_IS_QUOTA_RUNNING(mp))
 172                 return -ENOSYS;
 173         if (!XFS_IS_QUOTA_ON(mp))
 174                 return -ESRCH;
 175
 176         return xfs_qm_scall_setqlim(mp, from_kqid(&init_user_ns, qid),
 177                                      xfs_quota_type(qid.type), qdq);
 178 }
 179
 180 const struct quotactl_ops xfs_quotactl_operations = {
 181         .get_xstatev            = xfs_fs_get_xstatev,
 182         .get_xstate             = xfs_fs_get_xstate,
 183         .quota_enable           = xfs_quota_enable,
 184         .quota_disable          = xfs_quota_disable,
 185         .rm_xquota              = xfs_fs_rm_xquota,
 186         .get_dqblk              = xfs_fs_get_dqblk,
 187         .set_dqblk              = xfs_fs_set_dqblk,
 188 };