fs/xfs/xfs_quota.h - linux - Git at Google

 /*
  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
  * 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
  */
 #ifndef __XFS_QUOTA_H__
 #define __XFS_QUOTA_H__

 struct xfs_trans;

 /*
  * Even though users may not have quota limits occupying all 64-bits,
  * they may need 64-bit accounting. Hence, 64-bit quota-counters,
  * and quota-limits. This is a waste in the common case, but hey ...
  */
 typedef __uint64_t	xfs_qcnt_t;
 typedef __uint16_t	xfs_qwarncnt_t;

 /*
  * flags for q_flags field in the dquot.
  */
 #define XFS_DQ_USER		0x0001		/* a user quota */
 #define XFS_DQ_PROJ		0x0002		/* project quota */
 #define XFS_DQ_GROUP		0x0004		/* a group quota */
 #define XFS_DQ_DIRTY		0x0008		/* dquot is dirty */
 #define XFS_DQ_FREEING		0x0010		/* dquot is beeing torn down */

 #define XFS_DQ_ALLTYPES		(XFS_DQ_USER|XFS_DQ_PROJ|XFS_DQ_GROUP)

 #define XFS_DQ_FLAGS \
 	{ XFS_DQ_USER,		"USER" }, \
 	{ XFS_DQ_PROJ,		"PROJ" }, \
 	{ XFS_DQ_GROUP,		"GROUP" }, \
 	{ XFS_DQ_DIRTY,		"DIRTY" }, \
 	{ XFS_DQ_FREEING,	"FREEING" }

 /*
  * We have the possibility of all three quota types being active at once, and
  * hence free space modification requires modification of all three current
  * dquots in a single transaction. For this case we need to have a reservation
  * of at least 3 dquots.
  *
  * However, a chmod operation can change both UID and GID in a single
  * transaction, resulting in requiring {old, new} x {uid, gid} dquots to be
  * modified. Hence for this case we need to reserve space for at least 4 dquots.
  *
  * And in the worst case, there's a rename operation that can be modifying up to
  * 4 inodes with dquots attached to them. In reality, the only inodes that can
  * have their dquots modified are the source and destination directory inodes
  * due to directory name creation and removal. That can require space allocation
  * and/or freeing on both directory inodes, and hence all three dquots on each
  * inode can be modified. And if the directories are world writeable, all the
  * dquots can be unique and so 6 dquots can be modified....
  *
  * And, of course, we also need to take into account the dquot log format item
  * used to describe each dquot.
  */
 #define XFS_DQUOT_LOGRES(mp)	\
 	((sizeof(struct xfs_dq_logformat) + sizeof(struct xfs_disk_dquot)) * 6)

 #define XFS_IS_QUOTA_RUNNING(mp)	((mp)->m_qflags & XFS_ALL_QUOTA_ACCT)
 #define XFS_IS_UQUOTA_RUNNING(mp)	((mp)->m_qflags & XFS_UQUOTA_ACCT)
 #define XFS_IS_PQUOTA_RUNNING(mp)	((mp)->m_qflags & XFS_PQUOTA_ACCT)
 #define XFS_IS_GQUOTA_RUNNING(mp)	((mp)->m_qflags & XFS_GQUOTA_ACCT)
 #define XFS_IS_UQUOTA_ENFORCED(mp)	((mp)->m_qflags & XFS_UQUOTA_ENFD)
 #define XFS_IS_GQUOTA_ENFORCED(mp)	((mp)->m_qflags & XFS_GQUOTA_ENFD)
 #define XFS_IS_PQUOTA_ENFORCED(mp)	((mp)->m_qflags & XFS_PQUOTA_ENFD)

 /*
  * Incore only flags for quotaoff - these bits get cleared when quota(s)
  * are in the process of getting turned off. These flags are in m_qflags but
  * never in sb_qflags.
  */
 #define XFS_UQUOTA_ACTIVE	0x1000  /* uquotas are being turned off */
 #define XFS_GQUOTA_ACTIVE	0x2000  /* gquotas are being turned off */
 #define XFS_PQUOTA_ACTIVE	0x4000  /* pquotas are being turned off */
 #define XFS_ALL_QUOTA_ACTIVE	\
 	(XFS_UQUOTA_ACTIVE | XFS_GQUOTA_ACTIVE | XFS_PQUOTA_ACTIVE)

 /*
  * Checking XFS_IS_*QUOTA_ON() while holding any inode lock guarantees
  * quota will be not be switched off as long as that inode lock is held.
  */
 #define XFS_IS_QUOTA_ON(mp)	((mp)->m_qflags & (XFS_UQUOTA_ACTIVE | \
 						   XFS_GQUOTA_ACTIVE | \
 						   XFS_PQUOTA_ACTIVE))
 #define XFS_IS_OQUOTA_ON(mp)	((mp)->m_qflags & (XFS_GQUOTA_ACTIVE | \
 						   XFS_PQUOTA_ACTIVE))
 #define XFS_IS_UQUOTA_ON(mp)	((mp)->m_qflags & XFS_UQUOTA_ACTIVE)
 #define XFS_IS_GQUOTA_ON(mp)	((mp)->m_qflags & XFS_GQUOTA_ACTIVE)
 #define XFS_IS_PQUOTA_ON(mp)	((mp)->m_qflags & XFS_PQUOTA_ACTIVE)

 /*
  * Flags to tell various functions what to do. Not all of these are meaningful
  * to a single function. None of these XFS_QMOPT_* flags are meant to have
  * persistent values (ie. their values can and will change between versions)
  */
 #define XFS_QMOPT_DQALLOC	0x0000002 /* alloc dquot ondisk if needed */
 #define XFS_QMOPT_UQUOTA	0x0000004 /* user dquot requested */
 #define XFS_QMOPT_PQUOTA	0x0000008 /* project dquot requested */
 #define XFS_QMOPT_FORCE_RES	0x0000010 /* ignore quota limits */
 #define XFS_QMOPT_SBVERSION	0x0000040 /* change superblock version num */
 #define XFS_QMOPT_DOWARN        0x0000400 /* increase warning cnt if needed */
 #define XFS_QMOPT_DQREPAIR	0x0001000 /* repair dquot if damaged */
 #define XFS_QMOPT_GQUOTA	0x0002000 /* group dquot requested */
 #define XFS_QMOPT_ENOSPC	0x0004000 /* enospc instead of edquot (prj) */

 /*
  * flags to xfs_trans_mod_dquot to indicate which field needs to be
  * modified.
  */
 #define XFS_QMOPT_RES_REGBLKS	0x0010000
 #define XFS_QMOPT_RES_RTBLKS	0x0020000
 #define XFS_QMOPT_BCOUNT	0x0040000
 #define XFS_QMOPT_ICOUNT	0x0080000
 #define XFS_QMOPT_RTBCOUNT	0x0100000
 #define XFS_QMOPT_DELBCOUNT	0x0200000
 #define XFS_QMOPT_DELRTBCOUNT	0x0400000
 #define XFS_QMOPT_RES_INOS	0x0800000

 /*
  * flags for dqalloc.
  */
 #define XFS_QMOPT_INHERIT	0x1000000

 /*
  * flags to xfs_trans_mod_dquot.
  */
 #define XFS_TRANS_DQ_RES_BLKS	XFS_QMOPT_RES_REGBLKS
 #define XFS_TRANS_DQ_RES_RTBLKS	XFS_QMOPT_RES_RTBLKS
 #define XFS_TRANS_DQ_RES_INOS	XFS_QMOPT_RES_INOS
 #define XFS_TRANS_DQ_BCOUNT	XFS_QMOPT_BCOUNT
 #define XFS_TRANS_DQ_DELBCOUNT	XFS_QMOPT_DELBCOUNT
 #define XFS_TRANS_DQ_ICOUNT	XFS_QMOPT_ICOUNT
 #define XFS_TRANS_DQ_RTBCOUNT	XFS_QMOPT_RTBCOUNT
 #define XFS_TRANS_DQ_DELRTBCOUNT XFS_QMOPT_DELRTBCOUNT


 #define XFS_QMOPT_QUOTALL	\
 		(XFS_QMOPT_UQUOTA | XFS_QMOPT_PQUOTA | XFS_QMOPT_GQUOTA)
 #define XFS_QMOPT_RESBLK_MASK	(XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_RES_RTBLKS)

 #ifdef __KERNEL__
 /*
  * This check is done typically without holding the inode lock;
  * that may seem racy, but it is harmless in the context that it is used.
  * The inode cannot go inactive as long a reference is kept, and
  * therefore if dquot(s) were attached, they'll stay consistent.
  * If, for example, the ownership of the inode changes while
  * we didn't have the inode locked, the appropriate dquot(s) will be
  * attached atomically.
  */
 #define XFS_NOT_DQATTACHED(mp, ip) \
 	((XFS_IS_UQUOTA_ON(mp) && (ip)->i_udquot == NULL) || \
 	 (XFS_IS_GQUOTA_ON(mp) && (ip)->i_gdquot == NULL) || \
 	 (XFS_IS_PQUOTA_ON(mp) && (ip)->i_pdquot == NULL))

 #define XFS_QM_NEED_QUOTACHECK(mp) \
 	((XFS_IS_UQUOTA_ON(mp) && \
 		(mp->m_sb.sb_qflags & XFS_UQUOTA_CHKD) == 0) || \
 	 (XFS_IS_GQUOTA_ON(mp) && \
 		(mp->m_sb.sb_qflags & XFS_GQUOTA_CHKD) == 0) || \
 	 (XFS_IS_PQUOTA_ON(mp) && \
 		(mp->m_sb.sb_qflags & XFS_PQUOTA_CHKD) == 0))

 #define XFS_MOUNT_QUOTA_ALL	(XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD|\
 				 XFS_UQUOTA_CHKD|XFS_GQUOTA_ACCT|\
 				 XFS_GQUOTA_ENFD|XFS_GQUOTA_CHKD|\
 				 XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD|\
 				 XFS_PQUOTA_CHKD)


 /*
  * The structure kept inside the xfs_trans_t keep track of dquot changes
  * within a transaction and apply them later.
  */
 typedef struct xfs_dqtrx {
 	struct xfs_dquot *qt_dquot;	  /* the dquot this refers to */
 	ulong		qt_blk_res;	  /* blks reserved on a dquot */
 	ulong		qt_blk_res_used;  /* blks used from the reservation */
 	ulong		qt_ino_res;	  /* inode reserved on a dquot */
 	ulong		qt_ino_res_used;  /* inodes used from the reservation */
 	long		qt_bcount_delta;  /* dquot blk count changes */
 	long		qt_delbcnt_delta; /* delayed dquot blk count changes */
 	long		qt_icount_delta;  /* dquot inode count changes */
 	ulong		qt_rtblk_res;	  /* # blks reserved on a dquot */
 	ulong		qt_rtblk_res_used;/* # blks used from reservation */
 	long		qt_rtbcount_delta;/* dquot realtime blk changes */
 	long		qt_delrtb_delta;  /* delayed RT blk count changes */
 } xfs_dqtrx_t;

 #ifdef CONFIG_XFS_QUOTA
 extern void xfs_trans_dup_dqinfo(struct xfs_trans *, struct xfs_trans *);
 extern void xfs_trans_free_dqinfo(struct xfs_trans *);
 extern void xfs_trans_mod_dquot_byino(struct xfs_trans *, struct xfs_inode *,
 		uint, long);
 extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *);
 extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *);
 extern int xfs_trans_reserve_quota_nblks(struct xfs_trans *,
 		struct xfs_inode *, long, long, uint);
 extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
 		struct xfs_mount *, struct xfs_dquot *,
 		struct xfs_dquot *, struct xfs_dquot *, long, long, uint);

 extern int xfs_qm_vop_dqalloc(struct xfs_inode *, uid_t, gid_t, prid_t, uint,
 		struct xfs_dquot **, struct xfs_dquot **, struct xfs_dquot **);
 extern void xfs_qm_vop_create_dqattach(struct xfs_trans *, struct xfs_inode *,
 		struct xfs_dquot *, struct xfs_dquot *, struct xfs_dquot *);
 extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **);
 extern struct xfs_dquot *xfs_qm_vop_chown(struct xfs_trans *,
 		struct xfs_inode *, struct xfs_dquot **, struct xfs_dquot *);
 extern int xfs_qm_vop_chown_reserve(struct xfs_trans *, struct xfs_inode *,
 		struct xfs_dquot *, struct xfs_dquot *,
 		struct xfs_dquot *, uint);
 extern int xfs_qm_dqattach(struct xfs_inode *, uint);
 extern int xfs_qm_dqattach_locked(struct xfs_inode *, uint);
 extern void xfs_qm_dqdetach(struct xfs_inode *);
 extern void xfs_qm_dqrele(struct xfs_dquot *);
 extern void xfs_qm_statvfs(struct xfs_inode *, struct kstatfs *);
 extern int xfs_qm_newmount(struct xfs_mount *, uint *, uint *);
 extern void xfs_qm_mount_quotas(struct xfs_mount *);
 extern void xfs_qm_unmount(struct xfs_mount *);
 extern void xfs_qm_unmount_quotas(struct xfs_mount *);

 #else
 static inline int
 xfs_qm_vop_dqalloc(struct xfs_inode *ip, uid_t uid, gid_t gid, prid_t prid,
 		uint flags, struct xfs_dquot **udqp, struct xfs_dquot **gdqp,
 		struct xfs_dquot **pdqp)
 {
 	*udqp = NULL;
 	*gdqp = NULL;
 	*pdqp = NULL;
 	return 0;
 }
 #define xfs_trans_dup_dqinfo(tp, tp2)
 #define xfs_trans_free_dqinfo(tp)
 #define xfs_trans_mod_dquot_byino(tp, ip, fields, delta)
 #define xfs_trans_apply_dquot_deltas(tp)
 #define xfs_trans_unreserve_and_mod_dquots(tp)
 static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp,
 		struct xfs_inode *ip, long nblks, long ninos, uint flags)
 {
 	return 0;
 }
 static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
 		struct xfs_mount *mp, struct xfs_dquot *udqp,
 		struct xfs_dquot *gdqp, struct xfs_dquot *pdqp,
 		long nblks, long nions, uint flags)
 {
 	return 0;
 }
 #define xfs_qm_vop_create_dqattach(tp, ip, u, g, p)
 #define xfs_qm_vop_rename_dqattach(it)					(0)
 #define xfs_qm_vop_chown(tp, ip, old, new)				(NULL)
 #define xfs_qm_vop_chown_reserve(tp, ip, u, g, p, fl)			(0)
 #define xfs_qm_dqattach(ip, fl)						(0)
 #define xfs_qm_dqattach_locked(ip, fl)					(0)
 #define xfs_qm_dqdetach(ip)
 #define xfs_qm_dqrele(d)
 #define xfs_qm_statvfs(ip, s)
 #define xfs_qm_newmount(mp, a, b)					(0)
 #define xfs_qm_mount_quotas(mp)
 #define xfs_qm_unmount(mp)
 #define xfs_qm_unmount_quotas(mp)
 #endif /* CONFIG_XFS_QUOTA */

 #define xfs_trans_unreserve_quota_nblks(tp, ip, nblks, ninos, flags) \
 	xfs_trans_reserve_quota_nblks(tp, ip, -(nblks), -(ninos), flags)
 #define xfs_trans_reserve_quota(tp, mp, ud, gd, pd, nb, ni, f) \
 	xfs_trans_reserve_quota_bydquots(tp, mp, ud, gd, pd, nb, ni, \
 				f | XFS_QMOPT_RES_REGBLKS)

 extern int xfs_qm_dqcheck(struct xfs_mount *, xfs_disk_dquot_t *,
 				xfs_dqid_t, uint, uint, char *);
 extern int xfs_mount_reset_sbqflags(struct xfs_mount *);

 extern const struct xfs_buf_ops xfs_dquot_buf_ops;

 #endif	/* __KERNEL__ */
 #endif	/* __XFS_QUOTA_H__ */
	/*
	* Copyright (c) 2000-2005 Silicon Graphics, Inc.
	* 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
	*/
	#ifndef __XFS_QUOTA_H__
	#define __XFS_QUOTA_H__

	struct xfs_trans;

	/*
	* Even though users may not have quota limits occupying all 64-bits,
	* they may need 64-bit accounting. Hence, 64-bit quota-counters,
	* and quota-limits. This is a waste in the common case, but hey ...
	*/
	typedef __uint64_t xfs_qcnt_t;
	typedef __uint16_t xfs_qwarncnt_t;

	/*
	* flags for q_flags field in the dquot.
	*/
	#define XFS_DQ_USER 0x0001 /* a user quota */
	#define XFS_DQ_PROJ 0x0002 /* project quota */
	#define XFS_DQ_GROUP 0x0004 /* a group quota */
	#define XFS_DQ_DIRTY 0x0008 /* dquot is dirty */
	#define XFS_DQ_FREEING 0x0010 /* dquot is beeing torn down */

	#define XFS_DQ_ALLTYPES (XFS_DQ_USER\|XFS_DQ_PROJ\|XFS_DQ_GROUP)

	#define XFS_DQ_FLAGS \
	{ XFS_DQ_USER, "USER" }, \
	{ XFS_DQ_PROJ, "PROJ" }, \
	{ XFS_DQ_GROUP, "GROUP" }, \
	{ XFS_DQ_DIRTY, "DIRTY" }, \
	{ XFS_DQ_FREEING, "FREEING" }

	/*
	* We have the possibility of all three quota types being active at once, and
	* hence free space modification requires modification of all three current
	* dquots in a single transaction. For this case we need to have a reservation
	* of at least 3 dquots.
	*
	* However, a chmod operation can change both UID and GID in a single
	* transaction, resulting in requiring {old, new} x {uid, gid} dquots to be
	* modified. Hence for this case we need to reserve space for at least 4 dquots.
	*
	* And in the worst case, there's a rename operation that can be modifying up to
	* 4 inodes with dquots attached to them. In reality, the only inodes that can
	* have their dquots modified are the source and destination directory inodes
	* due to directory name creation and removal. That can require space allocation
	* and/or freeing on both directory inodes, and hence all three dquots on each
	* inode can be modified. And if the directories are world writeable, all the
	* dquots can be unique and so 6 dquots can be modified....
	*
	* And, of course, we also need to take into account the dquot log format item
	* used to describe each dquot.
	*/
	#define XFS_DQUOT_LOGRES(mp) \
	((sizeof(struct xfs_dq_logformat) + sizeof(struct xfs_disk_dquot)) * 6)

	#define XFS_IS_QUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_ALL_QUOTA_ACCT)
	#define XFS_IS_UQUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_UQUOTA_ACCT)
	#define XFS_IS_PQUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_PQUOTA_ACCT)
	#define XFS_IS_GQUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_GQUOTA_ACCT)
	#define XFS_IS_UQUOTA_ENFORCED(mp) ((mp)->m_qflags & XFS_UQUOTA_ENFD)
	#define XFS_IS_GQUOTA_ENFORCED(mp) ((mp)->m_qflags & XFS_GQUOTA_ENFD)
	#define XFS_IS_PQUOTA_ENFORCED(mp) ((mp)->m_qflags & XFS_PQUOTA_ENFD)

	/*
	* Incore only flags for quotaoff - these bits get cleared when quota(s)
	* are in the process of getting turned off. These flags are in m_qflags but
	* never in sb_qflags.
	*/
	#define XFS_UQUOTA_ACTIVE 0x1000 /* uquotas are being turned off */
	#define XFS_GQUOTA_ACTIVE 0x2000 /* gquotas are being turned off */
	#define XFS_PQUOTA_ACTIVE 0x4000 /* pquotas are being turned off */
	#define XFS_ALL_QUOTA_ACTIVE \
	(XFS_UQUOTA_ACTIVE \| XFS_GQUOTA_ACTIVE \| XFS_PQUOTA_ACTIVE)

	/*
	* Checking XFS_IS_*QUOTA_ON() while holding any inode lock guarantees
	* quota will be not be switched off as long as that inode lock is held.
	*/
	#define XFS_IS_QUOTA_ON(mp) ((mp)->m_qflags & (XFS_UQUOTA_ACTIVE \| \
	XFS_GQUOTA_ACTIVE \| \
	XFS_PQUOTA_ACTIVE))
	#define XFS_IS_OQUOTA_ON(mp) ((mp)->m_qflags & (XFS_GQUOTA_ACTIVE \| \
	XFS_PQUOTA_ACTIVE))
	#define XFS_IS_UQUOTA_ON(mp) ((mp)->m_qflags & XFS_UQUOTA_ACTIVE)
	#define XFS_IS_GQUOTA_ON(mp) ((mp)->m_qflags & XFS_GQUOTA_ACTIVE)
	#define XFS_IS_PQUOTA_ON(mp) ((mp)->m_qflags & XFS_PQUOTA_ACTIVE)

	/*
	* Flags to tell various functions what to do. Not all of these are meaningful
	* to a single function. None of these XFS_QMOPT_* flags are meant to have
	* persistent values (ie. their values can and will change between versions)
	*/
	#define XFS_QMOPT_DQALLOC 0x0000002 /* alloc dquot ondisk if needed */
	#define XFS_QMOPT_UQUOTA 0x0000004 /* user dquot requested */
	#define XFS_QMOPT_PQUOTA 0x0000008 /* project dquot requested */
	#define XFS_QMOPT_FORCE_RES 0x0000010 /* ignore quota limits */
	#define XFS_QMOPT_SBVERSION 0x0000040 /* change superblock version num */
	#define XFS_QMOPT_DOWARN 0x0000400 /* increase warning cnt if needed */
	#define XFS_QMOPT_DQREPAIR 0x0001000 /* repair dquot if damaged */
	#define XFS_QMOPT_GQUOTA 0x0002000 /* group dquot requested */
	#define XFS_QMOPT_ENOSPC 0x0004000 /* enospc instead of edquot (prj) */

	/*
	* flags to xfs_trans_mod_dquot to indicate which field needs to be
	* modified.
	*/
	#define XFS_QMOPT_RES_REGBLKS 0x0010000
	#define XFS_QMOPT_RES_RTBLKS 0x0020000
	#define XFS_QMOPT_BCOUNT 0x0040000
	#define XFS_QMOPT_ICOUNT 0x0080000
	#define XFS_QMOPT_RTBCOUNT 0x0100000
	#define XFS_QMOPT_DELBCOUNT 0x0200000
	#define XFS_QMOPT_DELRTBCOUNT 0x0400000
	#define XFS_QMOPT_RES_INOS 0x0800000

	/*
	* flags for dqalloc.
	*/
	#define XFS_QMOPT_INHERIT 0x1000000

	/*
	* flags to xfs_trans_mod_dquot.
	*/
	#define XFS_TRANS_DQ_RES_BLKS XFS_QMOPT_RES_REGBLKS
	#define XFS_TRANS_DQ_RES_RTBLKS XFS_QMOPT_RES_RTBLKS
	#define XFS_TRANS_DQ_RES_INOS XFS_QMOPT_RES_INOS
	#define XFS_TRANS_DQ_BCOUNT XFS_QMOPT_BCOUNT
	#define XFS_TRANS_DQ_DELBCOUNT XFS_QMOPT_DELBCOUNT
	#define XFS_TRANS_DQ_ICOUNT XFS_QMOPT_ICOUNT
	#define XFS_TRANS_DQ_RTBCOUNT XFS_QMOPT_RTBCOUNT
	#define XFS_TRANS_DQ_DELRTBCOUNT XFS_QMOPT_DELRTBCOUNT


	#define XFS_QMOPT_QUOTALL \
	(XFS_QMOPT_UQUOTA \| XFS_QMOPT_PQUOTA \| XFS_QMOPT_GQUOTA)
	#define XFS_QMOPT_RESBLK_MASK (XFS_QMOPT_RES_REGBLKS \| XFS_QMOPT_RES_RTBLKS)

	#ifdef __KERNEL__
	/*
	* This check is done typically without holding the inode lock;
	* that may seem racy, but it is harmless in the context that it is used.
	* The inode cannot go inactive as long a reference is kept, and
	* therefore if dquot(s) were attached, they'll stay consistent.
	* If, for example, the ownership of the inode changes while
	* we didn't have the inode locked, the appropriate dquot(s) will be
	* attached atomically.
	*/
	#define XFS_NOT_DQATTACHED(mp, ip) \
	((XFS_IS_UQUOTA_ON(mp) && (ip)->i_udquot == NULL) \|\| \
	(XFS_IS_GQUOTA_ON(mp) && (ip)->i_gdquot == NULL) \|\| \
	(XFS_IS_PQUOTA_ON(mp) && (ip)->i_pdquot == NULL))

	#define XFS_QM_NEED_QUOTACHECK(mp) \
	((XFS_IS_UQUOTA_ON(mp) && \
	(mp->m_sb.sb_qflags & XFS_UQUOTA_CHKD) == 0) \|\| \
	(XFS_IS_GQUOTA_ON(mp) && \
	(mp->m_sb.sb_qflags & XFS_GQUOTA_CHKD) == 0) \|\| \
	(XFS_IS_PQUOTA_ON(mp) && \
	(mp->m_sb.sb_qflags & XFS_PQUOTA_CHKD) == 0))

	#define XFS_MOUNT_QUOTA_ALL (XFS_UQUOTA_ACCT\|XFS_UQUOTA_ENFD\|\
	XFS_UQUOTA_CHKD\|XFS_GQUOTA_ACCT\|\
	XFS_GQUOTA_ENFD\|XFS_GQUOTA_CHKD\|\
	XFS_PQUOTA_ACCT\|XFS_PQUOTA_ENFD\|\
	XFS_PQUOTA_CHKD)


	/*
	* The structure kept inside the xfs_trans_t keep track of dquot changes
	* within a transaction and apply them later.
	*/
	typedef struct xfs_dqtrx {
	struct xfs_dquot qt_dquot; / the dquot this refers to */
	ulong qt_blk_res; /* blks reserved on a dquot */
	ulong qt_blk_res_used; /* blks used from the reservation */
	ulong qt_ino_res; /* inode reserved on a dquot */
	ulong qt_ino_res_used; /* inodes used from the reservation */
	long qt_bcount_delta; /* dquot blk count changes */
	long qt_delbcnt_delta; /* delayed dquot blk count changes */
	long qt_icount_delta; /* dquot inode count changes */
	ulong qt_rtblk_res; /* # blks reserved on a dquot */
	ulong qt_rtblk_res_used;/* # blks used from reservation */
	long qt_rtbcount_delta;/* dquot realtime blk changes */
	long qt_delrtb_delta; /* delayed RT blk count changes */
	} xfs_dqtrx_t;

	#ifdef CONFIG_XFS_QUOTA
	extern void xfs_trans_dup_dqinfo(struct xfs_trans , struct xfs_trans );
	extern void xfs_trans_free_dqinfo(struct xfs_trans *);
	extern void xfs_trans_mod_dquot_byino(struct xfs_trans , struct xfs_inode ,
	uint, long);
	extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *);
	extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *);
	extern int xfs_trans_reserve_quota_nblks(struct xfs_trans *,
	struct xfs_inode *, long, long, uint);
	extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
	struct xfs_mount , struct xfs_dquot ,
	struct xfs_dquot , struct xfs_dquot , long, long, uint);

	extern int xfs_qm_vop_dqalloc(struct xfs_inode *, uid_t, gid_t, prid_t, uint,
	struct xfs_dquot , struct xfs_dquot , struct xfs_dquot **);
	extern void xfs_qm_vop_create_dqattach(struct xfs_trans , struct xfs_inode ,
	struct xfs_dquot , struct xfs_dquot , struct xfs_dquot *);
	extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **);
	extern struct xfs_dquot xfs_qm_vop_chown(struct xfs_trans ,
	struct xfs_inode , struct xfs_dquot , struct xfs_dquot );
	extern int xfs_qm_vop_chown_reserve(struct xfs_trans , struct xfs_inode ,
	struct xfs_dquot , struct xfs_dquot ,
	struct xfs_dquot *, uint);
	extern int xfs_qm_dqattach(struct xfs_inode *, uint);
	extern int xfs_qm_dqattach_locked(struct xfs_inode *, uint);
	extern void xfs_qm_dqdetach(struct xfs_inode *);
	extern void xfs_qm_dqrele(struct xfs_dquot *);
	extern void xfs_qm_statvfs(struct xfs_inode , struct kstatfs );
	extern int xfs_qm_newmount(struct xfs_mount , uint , uint *);
	extern void xfs_qm_mount_quotas(struct xfs_mount *);
	extern void xfs_qm_unmount(struct xfs_mount *);
	extern void xfs_qm_unmount_quotas(struct xfs_mount *);

	#else
	static inline int
	xfs_qm_vop_dqalloc(struct xfs_inode *ip, uid_t uid, gid_t gid, prid_t prid,
	uint flags, struct xfs_dquot udqp, struct xfs_dquot gdqp,
	struct xfs_dquot **pdqp)
	{
	*udqp = NULL;
	*gdqp = NULL;
	*pdqp = NULL;
	return 0;
	}
	#define xfs_trans_dup_dqinfo(tp, tp2)
	#define xfs_trans_free_dqinfo(tp)
	#define xfs_trans_mod_dquot_byino(tp, ip, fields, delta)
	#define xfs_trans_apply_dquot_deltas(tp)
	#define xfs_trans_unreserve_and_mod_dquots(tp)
	static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp,
	struct xfs_inode *ip, long nblks, long ninos, uint flags)
	{
	return 0;
	}
	static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
	struct xfs_mount mp, struct xfs_dquot udqp,
	struct xfs_dquot gdqp, struct xfs_dquot pdqp,
	long nblks, long nions, uint flags)
	{
	return 0;
	}
	#define xfs_qm_vop_create_dqattach(tp, ip, u, g, p)
	#define xfs_qm_vop_rename_dqattach(it) (0)
	#define xfs_qm_vop_chown(tp, ip, old, new) (NULL)
	#define xfs_qm_vop_chown_reserve(tp, ip, u, g, p, fl) (0)
	#define xfs_qm_dqattach(ip, fl) (0)
	#define xfs_qm_dqattach_locked(ip, fl) (0)
	#define xfs_qm_dqdetach(ip)
	#define xfs_qm_dqrele(d)
	#define xfs_qm_statvfs(ip, s)
	#define xfs_qm_newmount(mp, a, b) (0)
	#define xfs_qm_mount_quotas(mp)
	#define xfs_qm_unmount(mp)
	#define xfs_qm_unmount_quotas(mp)
	#endif /* CONFIG_XFS_QUOTA */

	#define xfs_trans_unreserve_quota_nblks(tp, ip, nblks, ninos, flags) \
	xfs_trans_reserve_quota_nblks(tp, ip, -(nblks), -(ninos), flags)
	#define xfs_trans_reserve_quota(tp, mp, ud, gd, pd, nb, ni, f) \
	xfs_trans_reserve_quota_bydquots(tp, mp, ud, gd, pd, nb, ni, \
	f \| XFS_QMOPT_RES_REGBLKS)

	extern int xfs_qm_dqcheck(struct xfs_mount , xfs_disk_dquot_t ,
	xfs_dqid_t, uint, uint, char *);
	extern int xfs_mount_reset_sbqflags(struct xfs_mount *);

	extern const struct xfs_buf_ops xfs_dquot_buf_ops;

	#endif /* __KERNEL__ */
	#endif /* __XFS_QUOTA_H__ */