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_PDQ_ENFD|FS_QUOTA_GDQ_ENFD))
  79                 flags |= XFS_OQUOTA_ENFD;
  80
  81         switch (op) {
  82         case Q_XQUOTAON:
  83                 return -xfs_qm_scall_quotaon(mp, flags);
  84         case Q_XQUOTAOFF:
  85                 if (!XFS_IS_QUOTA_ON(mp))
  86                         return -EINVAL;
  87                 return -xfs_qm_scall_quotaoff(mp, flags);
  88         case Q_XQUOTARM:
  89                 if (XFS_IS_QUOTA_ON(mp))
  90                         return -EINVAL;
  91                 return -xfs_qm_scall_trunc_qfiles(mp, flags);
  92         }
  93
  94         return -EINVAL;
  95 }
  96
  97 STATIC int
  98 xfs_fs_get_dqblk(
  99         struct super_block      *sb,
 100         struct kqid             qid,
 101         struct fs_disk_quota    *fdq)
 102 {
 103         struct xfs_mount        *mp = XFS_M(sb);
 104
 105         if (!XFS_IS_QUOTA_RUNNING(mp))
 106                 return -ENOSYS;
 107         if (!XFS_IS_QUOTA_ON(mp))
 108                 return -ESRCH;
 109
 110         return -xfs_qm_scall_getquota(mp, from_kqid(&init_user_ns, qid),
 111                                       xfs_quota_type(qid.type), fdq);
 112 }
 113
 114 STATIC int
 115 xfs_fs_set_dqblk(
 116         struct super_block      *sb,
 117         struct kqid             qid,
 118         struct fs_disk_quota    *fdq)
 119 {
 120         struct xfs_mount        *mp = XFS_M(sb);
 121
 122         if (sb->s_flags & MS_RDONLY)
 123                 return -EROFS;
 124         if (!XFS_IS_QUOTA_RUNNING(mp))
 125                 return -ENOSYS;
 126         if (!XFS_IS_QUOTA_ON(mp))
 127                 return -ESRCH;
 128
 129         return -xfs_qm_scall_setqlim(mp, from_kqid(&init_user_ns, qid),
 130                                      xfs_quota_type(qid.type), fdq);
 131 }
 132
 133 const struct quotactl_ops xfs_quotactl_operations = {
 134         .get_xstate             = xfs_fs_get_xstate,
 135         .set_xstate             = xfs_fs_set_xstate,
 136         .get_dqblk              = xfs_fs_get_dqblk,
 137         .set_dqblk              = xfs_fs_set_dqblk,
 138 };