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_trans_resv.h"
  21 #include "xfs_log.h"
  22 #include "xfs_sb.h"
  23 #include "xfs_ag.h"
  24 #include "xfs_mount.h"
  25 #include "xfs_quota.h"
  26 #include "xfs_trans.h"
  27 #include "xfs_bmap_btree.h"
  28 #include "xfs_inode.h"
  29 #include "xfs_qm.h"
  30 #include <linux/quota.h>
  31
  32
  33 STATIC int
  34 xfs_quota_type(int type)
  35 {
  36         switch (type) {
  37         case USRQUOTA:
  38                 return XFS_DQ_USER;
  39         case GRPQUOTA:
  40                 return XFS_DQ_GROUP;
  41         default:
  42                 return XFS_DQ_PROJ;
  43         }
  44 }
  45
  46 STATIC int
  47 xfs_fs_get_xstate(
  48         struct super_block      *sb,
  49         struct fs_quota_stat    *fqs)
  50 {
  51         struct xfs_mount        *mp = XFS_M(sb);
  52
  53         if (!XFS_IS_QUOTA_RUNNING(mp))
  54                 return -ENOSYS;
  55         return -xfs_qm_scall_getqstat(mp, fqs);
  56 }
  57
  58 STATIC int
  59 xfs_fs_set_xstate(
  60         struct super_block      *sb,
  61         unsigned int            uflags,
  62         int                     op)
  63 {
  64         struct xfs_mount        *mp = XFS_M(sb);
  65         unsigned int            flags = 0;
  66
  67         if (sb->s_flags & MS_RDONLY)
  68                 return -EROFS;
  69         if (op != Q_XQUOTARM && !XFS_IS_QUOTA_RUNNING(mp))
  70                 return -ENOSYS;
  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         switch (op) {
  86         case Q_XQUOTAON:
  87                 return -xfs_qm_scall_quotaon(mp, flags);
  88         case Q_XQUOTAOFF:
  89                 if (!XFS_IS_QUOTA_ON(mp))
  90                         return -EINVAL;
  91                 return -xfs_qm_scall_quotaoff(mp, flags);
  92         case Q_XQUOTARM:
  93                 if (XFS_IS_QUOTA_ON(mp))
  94                         return -EINVAL;
  95                 return -xfs_qm_scall_trunc_qfiles(mp, flags);
  96         }
  97
  98         return -EINVAL;
  99 }
 100
 101 STATIC int
 102 xfs_fs_get_dqblk(
 103         struct super_block      *sb,
 104         struct kqid             qid,
 105         struct fs_disk_quota    *fdq)
 106 {
 107         struct xfs_mount        *mp = XFS_M(sb);
 108
 109         if (!XFS_IS_QUOTA_RUNNING(mp))
 110                 return -ENOSYS;
 111         if (!XFS_IS_QUOTA_ON(mp))
 112                 return -ESRCH;
 113
 114         return -xfs_qm_scall_getquota(mp, from_kqid(&init_user_ns, qid),
 115                                       xfs_quota_type(qid.type), fdq);
 116 }
 117
 118 STATIC int
 119 xfs_fs_set_dqblk(
 120         struct super_block      *sb,
 121         struct kqid             qid,
 122         struct fs_disk_quota    *fdq)
 123 {
 124         struct xfs_mount        *mp = XFS_M(sb);
 125
 126         if (sb->s_flags & MS_RDONLY)
 127                 return -EROFS;
 128         if (!XFS_IS_QUOTA_RUNNING(mp))
 129                 return -ENOSYS;
 130         if (!XFS_IS_QUOTA_ON(mp))
 131                 return -ESRCH;
 132
 133         return -xfs_qm_scall_setqlim(mp, from_kqid(&init_user_ns, qid),
 134                                      xfs_quota_type(qid.type), fdq);
 135 }
 136
 137 const struct quotactl_ops xfs_quotactl_operations = {
 138         .get_xstate             = xfs_fs_get_xstate,
 139         .set_xstate             = xfs_fs_set_xstate,
 140         .get_dqblk              = xfs_fs_get_dqblk,
 141         .set_dqblk              = xfs_fs_set_dqblk,
 142 };