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 (sb->s_flags & MS_RDONLY)
  54                 return -EROFS;
  55         if (!XFS_IS_QUOTA_RUNNING(mp))
  56                 return -ENOSYS;
  57         return -xfs_sync_data(mp, 0);
  58 }
  59
  60 STATIC int
  61 xfs_fs_get_xstate(
  62         struct super_block      *sb,
  63         struct fs_quota_stat    *fqs)
  64 {
  65         struct xfs_mount        *mp = XFS_M(sb);
  66
  67         if (!XFS_IS_QUOTA_RUNNING(mp))
  68                 return -ENOSYS;
  69         return -xfs_qm_scall_getqstat(mp, fqs);
  70 }
  71
  72 STATIC int
  73 xfs_fs_set_xstate(
  74         struct super_block      *sb,
  75         unsigned int            uflags,
  76         int                     op)
  77 {
  78         struct xfs_mount        *mp = XFS_M(sb);
  79         unsigned int            flags = 0;
  80
  81         if (sb->s_flags & MS_RDONLY)
  82                 return -EROFS;
  83         if (op != Q_XQUOTARM && !XFS_IS_QUOTA_RUNNING(mp))
  84                 return -ENOSYS;
  85         if (!capable(CAP_SYS_ADMIN))
  86                 return -EPERM;
  87
  88         if (uflags & XFS_QUOTA_UDQ_ACCT)
  89                 flags |= XFS_UQUOTA_ACCT;
  90         if (uflags & XFS_QUOTA_PDQ_ACCT)
  91                 flags |= XFS_PQUOTA_ACCT;
  92         if (uflags & XFS_QUOTA_GDQ_ACCT)
  93                 flags |= XFS_GQUOTA_ACCT;
  94         if (uflags & XFS_QUOTA_UDQ_ENFD)
  95                 flags |= XFS_UQUOTA_ENFD;
  96         if (uflags & (XFS_QUOTA_PDQ_ENFD|XFS_QUOTA_GDQ_ENFD))
  97                 flags |= XFS_OQUOTA_ENFD;
  98
  99         switch (op) {
 100         case Q_XQUOTAON:
 101                 return -xfs_qm_scall_quotaon(mp, flags);
 102         case Q_XQUOTAOFF:
 103                 if (!XFS_IS_QUOTA_ON(mp))
 104                         return -EINVAL;
 105                 return -xfs_qm_scall_quotaoff(mp, flags);
 106         case Q_XQUOTARM:
 107                 if (XFS_IS_QUOTA_ON(mp))
 108                         return -EINVAL;
 109                 return -xfs_qm_scall_trunc_qfiles(mp, flags);
 110         }
 111
 112         return -EINVAL;
 113 }
 114
 115 STATIC int
 116 xfs_fs_get_xquota(
 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 (!XFS_IS_QUOTA_RUNNING(mp))
 125                 return -ENOSYS;
 126         if (!XFS_IS_QUOTA_ON(mp))
 127                 return -ESRCH;
 128
 129         return -xfs_qm_scall_getquota(mp, id, xfs_quota_type(type), fdq);
 130 }
 131
 132 STATIC int
 133 xfs_fs_set_xquota(
 134         struct super_block      *sb,
 135         int                     type,
 136         qid_t                   id,
 137         struct fs_disk_quota    *fdq)
 138 {
 139         struct xfs_mount        *mp = XFS_M(sb);
 140
 141         if (sb->s_flags & MS_RDONLY)
 142                 return -EROFS;
 143         if (!XFS_IS_QUOTA_RUNNING(mp))
 144                 return -ENOSYS;
 145         if (!XFS_IS_QUOTA_ON(mp))
 146                 return -ESRCH;
 147         if (!capable(CAP_SYS_ADMIN))
 148                 return -EPERM;
 149
 150         return -xfs_qm_scall_setqlim(mp, id, xfs_quota_type(type), fdq);
 151 }
 152
 153 const struct quotactl_ops xfs_quotactl_operations = {
 154         .quota_sync             = xfs_fs_quota_sync,
 155         .get_xstate             = xfs_fs_get_xstate,
 156         .set_xstate             = xfs_fs_set_xstate,
 157         .get_xquota             = xfs_fs_get_xquota,
 158         .set_xquota             = xfs_fs_set_xquota,
 159 };