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_dmapi.h"
  20 #include "xfs_sb.h"
  21 #include "xfs_inum.h"
  22 #include "xfs_ag.h"
  23 #include "xfs_mount.h"
  24 #include "xfs_quota.h"
  25 #include "xfs_log.h"
  26 #include "xfs_trans.h"
  27 #include "xfs_bmap_btree.h"
  28 #include "xfs_inode.h"
  29 #include "quota/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_quota_sync(
  48         struct super_block      *sb,
  49         int                     type)
  50 {
  51         struct xfs_mount        *mp = XFS_M(sb);
  52
  53         if (!XFS_IS_QUOTA_RUNNING(mp))
  54                 return -ENOSYS;
  55         return -xfs_sync_inodes(mp, SYNC_DELWRI);
  56 }
  57
  58 STATIC int
  59 xfs_fs_get_xstate(
  60         struct super_block      *sb,
  61         struct fs_quota_stat    *fqs)
  62 {
  63         struct xfs_mount        *mp = XFS_M(sb);
  64
  65         if (!XFS_IS_QUOTA_RUNNING(mp))
  66                 return -ENOSYS;
  67         return -xfs_qm_scall_getqstat(mp, fqs);
  68 }
  69
  70 STATIC int
  71 xfs_fs_set_xstate(
  72         struct super_block      *sb,
  73         unsigned int            uflags,
  74         int                     op)
  75 {
  76         struct xfs_mount        *mp = XFS_M(sb);
  77         unsigned int            flags = 0;
  78
  79         if (sb->s_flags & MS_RDONLY)
  80                 return -EROFS;
  81         if (!XFS_IS_QUOTA_RUNNING(mp))
  82                 return -ENOSYS;
  83         if (!capable(CAP_SYS_ADMIN))
  84                 return -EPERM;
  85
  86         if (uflags & XFS_QUOTA_UDQ_ACCT)
  87                 flags |= XFS_UQUOTA_ACCT;
  88         if (uflags & XFS_QUOTA_PDQ_ACCT)
  89                 flags |= XFS_PQUOTA_ACCT;
  90         if (uflags & XFS_QUOTA_GDQ_ACCT)
  91                 flags |= XFS_GQUOTA_ACCT;
  92         if (uflags & XFS_QUOTA_UDQ_ENFD)
  93                 flags |= XFS_UQUOTA_ENFD;
  94         if (uflags & (XFS_QUOTA_PDQ_ENFD|XFS_QUOTA_GDQ_ENFD))
  95                 flags |= XFS_OQUOTA_ENFD;
  96
  97         switch (op) {
  98         case Q_XQUOTAON:
  99                 return -xfs_qm_scall_quotaon(mp, flags);
 100         case Q_XQUOTAOFF:
 101                 if (!XFS_IS_QUOTA_ON(mp))
 102                         return -EINVAL;
 103                 return -xfs_qm_scall_quotaoff(mp, flags);
 104         case Q_XQUOTARM:
 105                 if (XFS_IS_QUOTA_ON(mp))
 106                         return -EINVAL;
 107                 return -xfs_qm_scall_trunc_qfiles(mp, flags);
 108         }
 109
 110         return -EINVAL;
 111 }
 112
 113 STATIC int
 114 xfs_fs_get_xquota(
 115         struct super_block      *sb,
 116         int                     type,
 117         qid_t                   id,
 118         struct fs_disk_quota    *fdq)
 119 {
 120         struct xfs_mount        *mp = XFS_M(sb);
 121
 122         if (!XFS_IS_QUOTA_RUNNING(mp))
 123                 return -ENOSYS;
 124         if (!XFS_IS_QUOTA_ON(mp))
 125                 return -ESRCH;
 126
 127         return -xfs_qm_scall_getquota(mp, id, xfs_quota_type(type), fdq);
 128 }
 129
 130 STATIC int
 131 xfs_fs_set_xquota(
 132         struct super_block      *sb,
 133         int                     type,
 134         qid_t                   id,
 135         struct fs_disk_quota    *fdq)
 136 {
 137         struct xfs_mount        *mp = XFS_M(sb);
 138
 139         if (sb->s_flags & MS_RDONLY)
 140                 return -EROFS;
 141         if (!XFS_IS_QUOTA_RUNNING(mp))
 142                 return -ENOSYS;
 143         if (!XFS_IS_QUOTA_ON(mp))
 144                 return -ESRCH;
 145         if (!capable(CAP_SYS_ADMIN))
 146                 return -EPERM;
 147
 148         return -xfs_qm_scall_setqlim(mp, id, xfs_quota_type(type), fdq);
 149 }
 150
 151 struct quotactl_ops xfs_quotactl_operations = {
 152         .quota_sync             = xfs_fs_quota_sync,
 153         .get_xstate             = xfs_fs_get_xstate,
 154         .set_xstate             = xfs_fs_set_xstate,
 155         .get_xquota             = xfs_fs_get_xquota,
 156         .set_xquota             = xfs_fs_set_xquota,
 157 };