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_sb.h"
  20 #include "xfs_log.h"
  21 #include "xfs_ag.h"
  22 #include "xfs_mount.h"
  23 #include "xfs_quota.h"
  24 #include "xfs_trans.h"
  25 #include "xfs_bmap_btree.h"
  26 #include "xfs_inode.h"
  27 #include "xfs_qm.h"
  28 #include <linux/quota.h>
  29
  30
  31 STATIC int
  32 xfs_quota_type(int type)
  33 {
  34         switch (type) {
  35         case USRQUOTA:
  36                 return XFS_DQ_USER;
  37         case GRPQUOTA:
  38                 return XFS_DQ_GROUP;
  39         default:
  40                 return XFS_DQ_PROJ;
  41         }
  42 }
  43
  44 STATIC int
  45 xfs_fs_get_xstate(
  46         struct super_block      *sb,
  47         struct fs_quota_stat    *fqs)
  48 {
  49         struct xfs_mount        *mp = XFS_M(sb);
  50
  51         if (!XFS_IS_QUOTA_RUNNING(mp))
  52                 return -ENOSYS;
  53         return -xfs_qm_scall_getqstat(mp, fqs);
  54 }
  55
  56 STATIC int
  57 xfs_fs_set_xstate(
  58         struct super_block      *sb,
  59         unsigned int            uflags,
  60         int                     op)
  61 {
  62         struct xfs_mount        *mp = XFS_M(sb);
  63         unsigned int            flags = 0;
  64
  65         if (sb->s_flags & MS_RDONLY)
  66                 return -EROFS;
  67         if (op != Q_XQUOTARM && !XFS_IS_QUOTA_RUNNING(mp))
  68                 return -ENOSYS;
  69
  70         if (uflags & FS_QUOTA_UDQ_ACCT)
  71                 flags |= XFS_UQUOTA_ACCT;
  72         if (uflags & FS_QUOTA_PDQ_ACCT)
  73                 flags |= XFS_PQUOTA_ACCT;
  74         if (uflags & FS_QUOTA_GDQ_ACCT)
  75                 flags |= XFS_GQUOTA_ACCT;
  76         if (uflags & FS_QUOTA_UDQ_ENFD)
  77                 flags |= XFS_UQUOTA_ENFD;
  78         if (uflags & FS_QUOTA_GDQ_ENFD)
  79                 flags |= XFS_GQUOTA_ENFD;
  80         if (uflags & FS_QUOTA_PDQ_ENFD)
  81                 flags |= XFS_PQUOTA_ENFD;
  82
  83         switch (op) {
  84         case Q_XQUOTAON:
  85                 return -xfs_qm_scall_quotaon(mp, flags);
  86         case Q_XQUOTAOFF:
  87                 if (!XFS_IS_QUOTA_ON(mp))
  88                         return -EINVAL;
  89                 return -xfs_qm_scall_quotaoff(mp, flags);
  90         case Q_XQUOTARM:
  91                 if (XFS_IS_QUOTA_ON(mp))
  92                         return -EINVAL;
  93                 return -xfs_qm_scall_trunc_qfiles(mp, flags);
  94         }
  95
  96         return -EINVAL;
  97 }
  98
  99 STATIC int
 100 xfs_fs_get_dqblk(
 101         struct super_block      *sb,
 102         struct kqid             qid,
 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, from_kqid(&init_user_ns, qid),
 113                                       xfs_quota_type(qid.type), fdq);
 114 }
 115
 116 STATIC int
 117 xfs_fs_set_dqblk(
 118         struct super_block      *sb,
 119         struct kqid             qid,
 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, from_kqid(&init_user_ns, qid),
 132                                      xfs_quota_type(qid.type), fdq);
 133 }
 134
 135 const struct quotactl_ops xfs_quotactl_operations = {
 136         .get_xstate             = xfs_fs_get_xstate,
 137         .set_xstate             = xfs_fs_set_xstate,
 138         .get_dqblk              = xfs_fs_get_dqblk,
 139         .set_dqblk              = xfs_fs_set_dqblk,
 140 };