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_sb.h"
  23 #include "xfs_ag.h"
  24 #include "xfs_mount.h"
  25 #include "xfs_inode.h"
  26 #include "xfs_quota.h"
  27 #include "xfs_trans.h"
  28 #include "xfs_qm.h"
  29 #include <linux/quota.h>
  30
  31
  32 STATIC int
  33 xfs_quota_type(int type)
  34 {
  35         switch (type) {
  36         case USRQUOTA:
  37                 return XFS_DQ_USER;
  38         case GRPQUOTA:
  39                 return XFS_DQ_GROUP;
  40         default:
  41                 return XFS_DQ_PROJ;
  42         }
  43 }
  44
  45 STATIC int
  46 xfs_fs_get_xstate(
  47         struct super_block      *sb,
  48         struct fs_quota_stat    *fqs)
  49 {
  50         struct xfs_mount        *mp = XFS_M(sb);
  51
  52         if (!XFS_IS_QUOTA_RUNNING(mp))
  53                 return -ENOSYS;
  54         return -xfs_qm_scall_getqstat(mp, fqs);
  55 }
  56
  57 STATIC int
  58 xfs_fs_get_xstatev(
  59         struct super_block      *sb,
  60         struct fs_quota_statv   *fqs)
  61 {
  62         struct xfs_mount        *mp = XFS_M(sb);
  63
  64         if (!XFS_IS_QUOTA_RUNNING(mp))
  65                 return -ENOSYS;
  66         return -xfs_qm_scall_getqstatv(mp, fqs);
  67 }
  68
  69 STATIC int
  70 xfs_fs_set_xstate(
  71         struct super_block      *sb,
  72         unsigned int            uflags,
  73         int                     op)
  74 {
  75         struct xfs_mount        *mp = XFS_M(sb);
  76         unsigned int            flags = 0;
  77
  78         if (sb->s_flags & MS_RDONLY)
  79                 return -EROFS;
  80         if (op != Q_XQUOTARM && !XFS_IS_QUOTA_RUNNING(mp))
  81                 return -ENOSYS;
  82
  83         if (uflags & FS_QUOTA_UDQ_ACCT)
  84                 flags |= XFS_UQUOTA_ACCT;
  85         if (uflags & FS_QUOTA_PDQ_ACCT)
  86                 flags |= XFS_PQUOTA_ACCT;
  87         if (uflags & FS_QUOTA_GDQ_ACCT)
  88                 flags |= XFS_GQUOTA_ACCT;
  89         if (uflags & FS_QUOTA_UDQ_ENFD)
  90                 flags |= XFS_UQUOTA_ENFD;
  91         if (uflags & FS_QUOTA_GDQ_ENFD)
  92                 flags |= XFS_GQUOTA_ENFD;
  93         if (uflags & FS_QUOTA_PDQ_ENFD)
  94                 flags |= XFS_PQUOTA_ENFD;
  95
  96         switch (op) {
  97         case Q_XQUOTAON:
  98                 return -xfs_qm_scall_quotaon(mp, flags);
  99         case Q_XQUOTAOFF:
 100                 if (!XFS_IS_QUOTA_ON(mp))
 101                         return -EINVAL;
 102                 return -xfs_qm_scall_quotaoff(mp, flags);
 103         case Q_XQUOTARM:
 104                 if (XFS_IS_QUOTA_ON(mp))
 105                         return -EINVAL;
 106                 return -xfs_qm_scall_trunc_qfiles(mp, flags);
 107         }
 108
 109         return -EINVAL;
 110 }
 111
 112 STATIC int
 113 xfs_fs_get_dqblk(
 114         struct super_block      *sb,
 115         struct kqid             qid,
 116         struct fs_disk_quota    *fdq)
 117 {
 118         struct xfs_mount        *mp = XFS_M(sb);
 119
 120         if (!XFS_IS_QUOTA_RUNNING(mp))
 121                 return -ENOSYS;
 122         if (!XFS_IS_QUOTA_ON(mp))
 123                 return -ESRCH;
 124
 125         return -xfs_qm_scall_getquota(mp, from_kqid(&init_user_ns, qid),
 126                                       xfs_quota_type(qid.type), fdq);
 127 }
 128
 129 STATIC int
 130 xfs_fs_set_dqblk(
 131         struct super_block      *sb,
 132         struct kqid             qid,
 133         struct fs_disk_quota    *fdq)
 134 {
 135         struct xfs_mount        *mp = XFS_M(sb);
 136
 137         if (sb->s_flags & MS_RDONLY)
 138                 return -EROFS;
 139         if (!XFS_IS_QUOTA_RUNNING(mp))
 140                 return -ENOSYS;
 141         if (!XFS_IS_QUOTA_ON(mp))
 142                 return -ESRCH;
 143
 144         return -xfs_qm_scall_setqlim(mp, from_kqid(&init_user_ns, qid),
 145                                      xfs_quota_type(qid.type), fdq);
 146 }
 147
 148 const struct quotactl_ops xfs_quotactl_operations = {
 149         .get_xstatev            = xfs_fs_get_xstatev,
 150         .get_xstate             = xfs_fs_get_xstate,
 151         .set_xstate             = xfs_fs_set_xstate,
 152         .get_dqblk              = xfs_fs_get_dqblk,
 153         .set_dqblk              = xfs_fs_set_dqblk,
 154 };