release/src-rt-6.x.4708/linux/linux-2.6.36/fs/xfs/linux-2.6/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_sb.h"
  20 #include "xfs_inum.h"
  21 #include "xfs_log.h"
  22 #include "xfs_ag.h"
  23 #include "xfs_mount.h"
  24 #include "xfs_quota.h"
  25 #include "xfs_trans.h"
  26 #include "xfs_bmap_btree.h"
  27 #include "xfs_inode.h"
  28 #include "quota/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_set_xstate(
  59         struct super_block      *sb,
  60         unsigned int            uflags,
  61         int                     op)
  62 {
  63         struct xfs_mount        *mp = XFS_M(sb);
  64         unsigned int            flags = 0;
  65
  66         if (sb->s_flags & MS_RDONLY)
  67                 return -EROFS;
  68         if (op != Q_XQUOTARM && !XFS_IS_QUOTA_RUNNING(mp))
  69                 return -ENOSYS;
  70
  71         if (uflags & FS_QUOTA_UDQ_ACCT)
  72                 flags |= XFS_UQUOTA_ACCT;
  73         if (uflags & FS_QUOTA_PDQ_ACCT)
  74                 flags |= XFS_PQUOTA_ACCT;
  75         if (uflags & FS_QUOTA_GDQ_ACCT)
  76                 flags |= XFS_GQUOTA_ACCT;
  77         if (uflags & FS_QUOTA_UDQ_ENFD)
  78                 flags |= XFS_UQUOTA_ENFD;
  79         if (uflags & (FS_QUOTA_PDQ_ENFD|FS_QUOTA_GDQ_ENFD))
  80                 flags |= XFS_OQUOTA_ENFD;
  81
  82         switch (op) {
  83         case Q_XQUOTAON:
  84                 return -xfs_qm_scall_quotaon(mp, flags);
  85         case Q_XQUOTAOFF:
  86                 if (!XFS_IS_QUOTA_ON(mp))
  87                         return -EINVAL;
  88                 return -xfs_qm_scall_quotaoff(mp, flags);
  89         case Q_XQUOTARM:
  90                 if (XFS_IS_QUOTA_ON(mp))
  91                         return -EINVAL;
  92                 return -xfs_qm_scall_trunc_qfiles(mp, flags);
  93         }
  94
  95         return -EINVAL;
  96 }
  97
  98 STATIC int
  99 xfs_fs_get_dqblk(
 100         struct super_block      *sb,
 101         int                     type,
 102         qid_t                   id,
 103         struct fs_disk_quota    *fdq)
 104 {
 105         struct xfs_mount        *mp = XFS_M(sb);
 106
 107         if (!XFS_IS_QUOTA_RUNNING(mp))
 108                 return -ENOSYS;
 109         if (!XFS_IS_QUOTA_ON(mp))
 110                 return -ESRCH;
 111
 112         return -xfs_qm_scall_getquota(mp, id, xfs_quota_type(type), fdq);
 113 }
 114
 115 STATIC int
 116 xfs_fs_set_dqblk(
 117         struct super_block      *sb,
 118         int                     type,
 119         qid_t                   id,
 120         struct fs_disk_quota    *fdq)
 121 {
 122         struct xfs_mount        *mp = XFS_M(sb);
 123
 124         if (sb->s_flags & MS_RDONLY)
 125                 return -EROFS;
 126         if (!XFS_IS_QUOTA_RUNNING(mp))
 127                 return -ENOSYS;
 128         if (!XFS_IS_QUOTA_ON(mp))
 129                 return -ESRCH;
 130
 131         return -xfs_qm_scall_setqlim(mp, id, xfs_quota_type(type), fdq);
 132 }
 133
 134 const struct quotactl_ops xfs_quotactl_operations = {
 135         .get_xstate             = xfs_fs_get_xstate,
 136         .set_xstate             = xfs_fs_set_xstate,
 137         .get_dqblk              = xfs_fs_get_dqblk,
 138         .set_dqblk              = xfs_fs_set_dqblk,
 139 };