/*
   * Copyright (c) 2008, Christoph Hellwig
   * All Rights Reserved.
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License as
   * published by the Free Software Foundation.
   *
   * This program is distributed in the hope that it would be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write the Free Software Foundation,
   * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
   */
  #include "xfs.h"

  #include "xfs_format.h"

  #include "xfs_log_format.h"

  #include "xfs_trans_resv.h"

  #include "xfs_sb.h"

  #include "xfs_ag.h"
  #include "xfs_mount.h"

  #include "xfs_inode.h"

  #include "xfs_quota.h"

  #include "xfs_trans.h"

  #include "xfs_qm.h"

  #include <linux/quota.h>
  
  
  STATIC int
  xfs_quota_type(int type)
  {
  	switch (type) {
  	case USRQUOTA:
  		return XFS_DQ_USER;
  	case GRPQUOTA:
  		return XFS_DQ_GROUP;
  	default:
  		return XFS_DQ_PROJ;
  	}
  }
  
  STATIC int

  xfs_fs_get_xstate(
  	struct super_block	*sb,
  	struct fs_quota_stat	*fqs)
  {
  	struct xfs_mount	*mp = XFS_M(sb);
  
  	if (!XFS_IS_QUOTA_RUNNING(mp))
  		return -ENOSYS;
  	return -xfs_qm_scall_getqstat(mp, fqs);
  }
  
  STATIC int

  xfs_fs_get_xstatev(
  	struct super_block	*sb,
  	struct fs_quota_statv	*fqs)
  {
  	struct xfs_mount	*mp = XFS_M(sb);
  
  	if (!XFS_IS_QUOTA_RUNNING(mp))
  		return -ENOSYS;
  	return -xfs_qm_scall_getqstatv(mp, fqs);
  }
  
  STATIC int

  xfs_fs_set_xstate(
  	struct super_block	*sb,
  	unsigned int		uflags,
  	int			op)
  {
  	struct xfs_mount	*mp = XFS_M(sb);
  	unsigned int		flags = 0;
  
  	if (sb->s_flags & MS_RDONLY)
  		return -EROFS;

  	if (op != Q_XQUOTARM && !XFS_IS_QUOTA_RUNNING(mp))

  		return -ENOSYS;

  	if (uflags & FS_QUOTA_UDQ_ACCT)

  		flags |= XFS_UQUOTA_ACCT;

  	if (uflags & FS_QUOTA_PDQ_ACCT)

  		flags |= XFS_PQUOTA_ACCT;

  	if (uflags & FS_QUOTA_GDQ_ACCT)

  		flags |= XFS_GQUOTA_ACCT;

  	if (uflags & FS_QUOTA_UDQ_ENFD)

  		flags |= XFS_UQUOTA_ENFD;

  	if (uflags & FS_QUOTA_GDQ_ENFD)
  		flags |= XFS_GQUOTA_ENFD;
  	if (uflags & FS_QUOTA_PDQ_ENFD)
  		flags |= XFS_PQUOTA_ENFD;

  
  	switch (op) {
  	case Q_XQUOTAON:
  		return -xfs_qm_scall_quotaon(mp, flags);
  	case Q_XQUOTAOFF:
  		if (!XFS_IS_QUOTA_ON(mp))
  			return -EINVAL;
  		return -xfs_qm_scall_quotaoff(mp, flags);
  	case Q_XQUOTARM:
  		if (XFS_IS_QUOTA_ON(mp))
  			return -EINVAL;
  		return -xfs_qm_scall_trunc_qfiles(mp, flags);
  	}
  
  	return -EINVAL;
  }
  
  STATIC int

  xfs_fs_get_dqblk(

  	struct super_block	*sb,

  	struct kqid		qid,

  	struct fs_disk_quota	*fdq)
  {
  	struct xfs_mount	*mp = XFS_M(sb);
  
  	if (!XFS_IS_QUOTA_RUNNING(mp))
  		return -ENOSYS;
  	if (!XFS_IS_QUOTA_ON(mp))
  		return -ESRCH;

  	return -xfs_qm_scall_getquota(mp, from_kqid(&init_user_ns, qid),
  				      xfs_quota_type(qid.type), fdq);

  }
  
  STATIC int

  xfs_fs_set_dqblk(

  	struct super_block	*sb,

  	struct kqid		qid,

  	struct fs_disk_quota	*fdq)
  {
  	struct xfs_mount	*mp = XFS_M(sb);
  
  	if (sb->s_flags & MS_RDONLY)
  		return -EROFS;
  	if (!XFS_IS_QUOTA_RUNNING(mp))
  		return -ENOSYS;
  	if (!XFS_IS_QUOTA_ON(mp))
  		return -ESRCH;

  	return -xfs_qm_scall_setqlim(mp, from_kqid(&init_user_ns, qid),
  				     xfs_quota_type(qid.type), fdq);

  }

  const struct quotactl_ops xfs_quotactl_operations = {

  	.get_xstatev		= xfs_fs_get_xstatev,

  	.get_xstate		= xfs_fs_get_xstate,
  	.set_xstate		= xfs_fs_set_xstate,

  	.get_dqblk		= xfs_fs_get_dqblk,

  	.set_dqblk		= xfs_fs_set_dqblk,

  };