[linux-2.6-block.git] / fs / xfs / 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__

/*
 * The ondisk form of a dquot structure.
 */
#define XFS_DQUOT_MAGIC		0x4451		/* 'DQ' */
#define XFS_DQUOT_VERSION	(u_int8_t)0x01	/* latest version number */

/*
 * uid_t and gid_t are hard-coded to 32 bits in the inode.
 * Hence, an 'id' in a dquot is 32 bits..
 */
typedef __uint32_t	xfs_dqid_t;

/*
 * 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;

/*
 * This is the main portion of the on-disk representation of quota
 * information for a user. This is the q_core of the xfs_dquot_t that
 * is kept in kernel memory. We pad this with some more expansion room
 * to construct the on disk structure.
 */
typedef struct	xfs_disk_dquot {
	__be16		d_magic;	/* dquot magic = XFS_DQUOT_MAGIC */
	__u8		d_version;	/* dquot version */
	__u8		d_flags;	/* XFS_DQ_USER/PROJ/GROUP */
	__be32		d_id;		/* user,project,group id */
	__be64		d_blk_hardlimit;/* absolute limit on disk blks */
	__be64		d_blk_softlimit;/* preferred limit on disk blks */
	__be64		d_ino_hardlimit;/* maximum # allocated inodes */
	__be64		d_ino_softlimit;/* preferred inode limit */
	__be64		d_bcount;	/* disk blocks owned by the user */
	__be64		d_icount;	/* inodes owned by the user */
	__be32		d_itimer;	/* zero if within inode limits if not,
					   this is when we refuse service */
	__be32		d_btimer;	/* similar to above; for disk blocks */
	__be16		d_iwarns;	/* warnings issued wrt num inodes */
	__be16		d_bwarns;	/* warnings issued wrt disk blocks */
	__be32		d_pad0;		/* 64 bit align */
	__be64		d_rtb_hardlimit;/* absolute limit on realtime blks */
	__be64		d_rtb_softlimit;/* preferred limit on RT disk blks */
	__be64		d_rtbcount;	/* realtime blocks owned */
	__be32		d_rtbtimer;	/* similar to above; for RT disk blocks */
	__be16		d_rtbwarns;	/* warnings issued wrt RT disk blocks */
	__be16		d_pad;
} xfs_disk_dquot_t;

/*
 * This is what goes on disk. This is separated from the xfs_disk_dquot because
 * carrying the unnecessary padding would be a waste of memory.
 */
typedef struct xfs_dqblk {
	xfs_disk_dquot_t  dd_diskdq;	/* portion that lives incore as well */
	char		  dd_fill[32];	/* filling for posterity */
} xfs_dqblk_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_FLOCKED		0x0008		/* flush lock taken */
#define XFS_DQ_DIRTY		0x0010		/* dquot is dirty */
#define XFS_DQ_WANT		0x0020		/* for lookup/reclaim race */
#define XFS_DQ_INACTIVE		0x0040		/* dq off mplist & hashlist */
#define XFS_DQ_MARKER		0x0080		/* sentinel */

#define XFS_DQ_ALLTYPES		(XFS_DQ_USER|XFS_DQ_PROJ|XFS_DQ_GROUP)

/*
 * In the worst case, when both user and group quotas are on,
 * we can have a max of three dquots changing in a single transaction.
 */
#define XFS_DQUOT_LOGRES(mp)	(sizeof(xfs_disk_dquot_t) * 3)


/*
 * These are the structures used to lay out dquots and quotaoff
 * records on the log. Quite similar to those of inodes.
 */

/*
 * log format struct for dquots.
 * The first two fields must be the type and size fitting into
 * 32 bits : log_recovery code assumes that.
 */
typedef struct xfs_dq_logformat {
	__uint16_t		qlf_type;      /* dquot log item type */
	__uint16_t		qlf_size;      /* size of this item */
	xfs_dqid_t		qlf_id;	       /* usr/grp/proj id : 32 bits */
	__int64_t		qlf_blkno;     /* blkno of dquot buffer */
	__int32_t		qlf_len;       /* len of dquot buffer */
	__uint32_t		qlf_boffset;   /* off of dquot in buffer */
} xfs_dq_logformat_t;

/*
 * log format struct for QUOTAOFF records.
 * The first two fields must be the type and size fitting into
 * 32 bits : log_recovery code assumes that.
 * We write two LI_QUOTAOFF logitems per quotaoff, the last one keeps a pointer
 * to the first and ensures that the first logitem is taken out of the AIL
 * only when the last one is securely committed.
 */
typedef struct xfs_qoff_logformat {
	unsigned short		qf_type;	/* quotaoff log item type */
	unsigned short		qf_size;	/* size of this item */
	unsigned int		qf_flags;	/* USR and/or GRP */
	char			qf_pad[12];	/* padding for future */
} xfs_qoff_logformat_t;


/*
 * Disk quotas status in m_qflags, and also sb_qflags. 16 bits.
 */
#define XFS_UQUOTA_ACCT	0x0001  /* user quota accounting ON */
#define XFS_UQUOTA_ENFD	0x0002  /* user quota limits enforced */
#define XFS_UQUOTA_CHKD	0x0004  /* quotacheck run on usr quotas */
#define XFS_PQUOTA_ACCT	0x0008  /* project quota accounting ON */
#define XFS_OQUOTA_ENFD	0x0010  /* other (grp/prj) quota limits enforced */
#define XFS_OQUOTA_CHKD	0x0020  /* quotacheck run on other (grp/prj) quotas */
#define XFS_GQUOTA_ACCT	0x0040  /* group quota accounting ON */

/*
 * Quota Accounting/Enforcement flags
 */
#define XFS_ALL_QUOTA_ACCT	\
		(XFS_UQUOTA_ACCT | XFS_GQUOTA_ACCT | XFS_PQUOTA_ACCT)
#define XFS_ALL_QUOTA_ENFD	(XFS_UQUOTA_ENFD | XFS_OQUOTA_ENFD)
#define XFS_ALL_QUOTA_CHKD	(XFS_UQUOTA_CHKD | XFS_OQUOTA_CHKD)

#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_OQUOTA_ENFORCED(mp)	((mp)->m_qflags & XFS_OQUOTA_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	0x0100  /* uquotas are being turned off */
#define XFS_PQUOTA_ACTIVE	0x0200  /* pquotas are being turned off */
#define XFS_GQUOTA_ACTIVE	0x0400  /* gquotas are being turned off */

/*
 * 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_DQLOCK	0x0000001 /* dqlock */
#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_DQSUSER	0x0000020 /* don't cache super users dquot */
#define XFS_QMOPT_SBVERSION	0x0000040 /* change superblock version num */
#define XFS_QMOPT_QUOTAOFF	0x0000080 /* quotas are being turned off */
#define XFS_QMOPT_UMOUNTING	0x0000100 /* filesys is being unmounted */
#define XFS_QMOPT_DOLOG		0x0000200 /* log buf changes (in quotacheck) */
#define XFS_QMOPT_DOWARN        0x0000400 /* increase warning cnt if needed */
#define XFS_QMOPT_ILOCKED	0x0000800 /* inode is already locked (excl) */
#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 dqflush and dqflush_all.
 */
#define XFS_QMOPT_SYNC		0x1000000
#define XFS_QMOPT_ASYNC		0x2000000
#define XFS_QMOPT_DELWRI	0x4000000

/*
 * flags for dqalloc.
 */
#define XFS_QMOPT_INHERIT	0x8000000

/*
 * 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_OQUOTA_ON(mp) && \
				     (ip)->i_gdquot == 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_OQUOTA_CHKD) == 0 || \
		 (mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT))) || \
	 (XFS_IS_PQUOTA_ON(mp) && \
		((mp->m_sb.sb_qflags & XFS_OQUOTA_CHKD) == 0 || \
		 (mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT))))

#define XFS_MOUNT_QUOTA_SET1	(XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD|\
				 XFS_UQUOTA_CHKD|XFS_PQUOTA_ACCT|\
				 XFS_OQUOTA_ENFD|XFS_OQUOTA_CHKD)

#define XFS_MOUNT_QUOTA_SET2	(XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD|\
				 XFS_UQUOTA_CHKD|XFS_GQUOTA_ACCT|\
				 XFS_OQUOTA_ENFD|XFS_OQUOTA_CHKD)

#define XFS_MOUNT_QUOTA_ALL	(XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD|\
				 XFS_UQUOTA_CHKD|XFS_PQUOTA_ACCT|\
				 XFS_OQUOTA_ENFD|XFS_OQUOTA_CHKD|\
				 XFS_GQUOTA_ACCT)


/*
 * 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;

/*
 * Dquot transaction functions, used if quota is enabled.
 */
typedef void	(*qo_dup_dqinfo_t)(struct xfs_trans *, struct xfs_trans *);
typedef void	(*qo_mod_dquot_byino_t)(struct xfs_trans *,
				struct xfs_inode *, uint, long);
typedef void	(*qo_free_dqinfo_t)(struct xfs_trans *);
typedef void	(*qo_apply_dquot_deltas_t)(struct xfs_trans *);
typedef void	(*qo_unreserve_and_mod_dquots_t)(struct xfs_trans *);
typedef int	(*qo_reserve_quota_nblks_t)(
				struct xfs_trans *, struct xfs_mount *,
				struct xfs_inode *, long, long, uint);
typedef int	(*qo_reserve_quota_bydquots_t)(
				struct xfs_trans *, struct xfs_mount *,
				struct xfs_dquot *, struct xfs_dquot *,
				long, long, uint);
typedef struct xfs_dqtrxops {
	qo_dup_dqinfo_t			qo_dup_dqinfo;
	qo_free_dqinfo_t		qo_free_dqinfo;
	qo_mod_dquot_byino_t		qo_mod_dquot_byino;
	qo_apply_dquot_deltas_t		qo_apply_dquot_deltas;
	qo_reserve_quota_nblks_t	qo_reserve_quota_nblks;
	qo_reserve_quota_bydquots_t	qo_reserve_quota_bydquots;
	qo_unreserve_and_mod_dquots_t	qo_unreserve_and_mod_dquots;
} xfs_dqtrxops_t;

#define XFS_DQTRXOP(mp, tp, op, args...) \
		((mp)->m_qm_ops->xfs_dqtrxops ? \
		((mp)->m_qm_ops->xfs_dqtrxops->op)(tp, ## args) : 0)

#define XFS_DQTRXOP_VOID(mp, tp, op, args...) \
		((mp)->m_qm_ops->xfs_dqtrxops ? \
		((mp)->m_qm_ops->xfs_dqtrxops->op)(tp, ## args) : (void)0)

#define XFS_TRANS_DUP_DQINFO(mp, otp, ntp) \
	XFS_DQTRXOP_VOID(mp, otp, qo_dup_dqinfo, ntp)
#define XFS_TRANS_FREE_DQINFO(mp, tp) \
	XFS_DQTRXOP_VOID(mp, tp, qo_free_dqinfo)
#define XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, field, delta) \
	XFS_DQTRXOP_VOID(mp, tp, qo_mod_dquot_byino, ip, field, delta)
#define XFS_TRANS_APPLY_DQUOT_DELTAS(mp, tp) \
	XFS_DQTRXOP_VOID(mp, tp, qo_apply_dquot_deltas)
#define XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, nblks, ninos, fl) \
	XFS_DQTRXOP(mp, tp, qo_reserve_quota_nblks, mp, ip, nblks, ninos, fl)
#define XFS_TRANS_RESERVE_QUOTA_BYDQUOTS(mp, tp, ud, gd, nb, ni, fl) \
	XFS_DQTRXOP(mp, tp, qo_reserve_quota_bydquots, mp, ud, gd, nb, ni, fl)
#define XFS_TRANS_UNRESERVE_AND_MOD_DQUOTS(mp, tp) \
	XFS_DQTRXOP_VOID(mp, tp, qo_unreserve_and_mod_dquots)

#define XFS_TRANS_UNRESERVE_QUOTA_NBLKS(mp, tp, ip, nblks, ninos, flags) \
	XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, -(nblks), -(ninos), flags)
#define XFS_TRANS_RESERVE_QUOTA(mp, tp, ud, gd, nb, ni, f) \
	XFS_TRANS_RESERVE_QUOTA_BYDQUOTS(mp, tp, ud, gd, nb, ni, \
				f | XFS_QMOPT_RES_REGBLKS)
#define XFS_TRANS_UNRESERVE_QUOTA(mp, tp, ud, gd, nb, ni, f) \
	XFS_TRANS_RESERVE_QUOTA_BYDQUOTS(mp, tp, ud, gd, -(nb), -(ni), \
				f | XFS_QMOPT_RES_REGBLKS)

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

extern struct xfs_qmops xfs_qmcore_xfs;

#endif	/* __KERNEL__ */

#endif	/* __XFS_QUOTA_H__ */
Commit	Line	Data
1da177e4	1	/*
7b718769 NS	2	* Copyright (c) 2000-2005 Silicon Graphics, Inc.
7b718769 NS	3	* All Rights Reserved.
1da177e4	4	*
7b718769 NS	5	* This program is free software; you can redistribute it and/or
7b718769 NS	6	* modify it under the terms of the GNU General Public License as
1da177e4 LT	7	* published by the Free Software Foundation.
1da177e4 LT	8	*
7b718769 NS	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.
1da177e4	13	*
7b718769 NS	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
1da177e4 LT	17	*/
	18	#ifndef __XFS_QUOTA_H__
	19	#define __XFS_QUOTA_H__
	20
	21	/*
	22	* The ondisk form of a dquot structure.
	23	*/
	24	#define XFS_DQUOT_MAGIC 0x4451 /* 'DQ' */
	25	#define XFS_DQUOT_VERSION (u_int8_t)0x01 /* latest version number */
	26
	27	/*
	28	* uid_t and gid_t are hard-coded to 32 bits in the inode.
	29	* Hence, an 'id' in a dquot is 32 bits..
	30	*/
c310ab6c	31	typedef __uint32_t xfs_dqid_t;
1da177e4 LT	32
1da177e4 LT	33	/*
c41564b5	34	* Even though users may not have quota limits occupying all 64-bits,
1da177e4 LT	35	* they may need 64-bit accounting. Hence, 64-bit quota-counters,
	36	* and quota-limits. This is a waste in the common case, but hey ...
	37	*/
	38	typedef __uint64_t xfs_qcnt_t;
	39	typedef __uint16_t xfs_qwarncnt_t;
	40
	41	/*
	42	* This is the main portion of the on-disk representation of quota
	43	* information for a user. This is the q_core of the xfs_dquot_t that
	44	* is kept in kernel memory. We pad this with some more expansion room
	45	* to construct the on disk structure.
	46	*/
	47	typedef struct xfs_disk_dquot {
1149d96a CH	48	__be16 d_magic; /* dquot magic = XFS_DQUOT_MAGIC */
	49	__u8 d_version; /* dquot version */
	50	__u8 d_flags; /* XFS_DQ_USER/PROJ/GROUP */
	51	__be32 d_id; /* user,project,group id */
	52	__be64 d_blk_hardlimit;/* absolute limit on disk blks */
	53	__be64 d_blk_softlimit;/* preferred limit on disk blks */
	54	__be64 d_ino_hardlimit;/* maximum # allocated inodes */
	55	__be64 d_ino_softlimit;/* preferred inode limit */
	56	__be64 d_bcount; /* disk blocks owned by the user */
	57	__be64 d_icount; /* inodes owned by the user */
	58	__be32 d_itimer; /* zero if within inode limits if not,
1da177e4	59	this is when we refuse service */
1149d96a CH	60	__be32 d_btimer; /* similar to above; for disk blocks */
	61	__be16 d_iwarns; /* warnings issued wrt num inodes */
	62	__be16 d_bwarns; /* warnings issued wrt disk blocks */
	63	__be32 d_pad0; /* 64 bit align */
	64	__be64 d_rtb_hardlimit;/* absolute limit on realtime blks */
	65	__be64 d_rtb_softlimit;/* preferred limit on RT disk blks */
	66	__be64 d_rtbcount; /* realtime blocks owned */
	67	__be32 d_rtbtimer; /* similar to above; for RT disk blocks */
	68	__be16 d_rtbwarns; /* warnings issued wrt RT disk blocks */
	69	__be16 d_pad;
1da177e4 LT	70	} xfs_disk_dquot_t;
	71
	72	/*
	73	* This is what goes on disk. This is separated from the xfs_disk_dquot because
	74	* carrying the unnecessary padding would be a waste of memory.
	75	*/
	76	typedef struct xfs_dqblk {
	77	xfs_disk_dquot_t dd_diskdq; /* portion that lives incore as well */
	78	char dd_fill[32]; /* filling for posterity */
	79	} xfs_dqblk_t;
	80
	81	/*
	82	* flags for q_flags field in the dquot.
	83	*/
	84	#define XFS_DQ_USER 0x0001 /* a user quota */
c8ad20ff	85	#define XFS_DQ_PROJ 0x0002 /* project quota */
1da177e4 LT	86	#define XFS_DQ_GROUP 0x0004 /* a group quota */
	87	#define XFS_DQ_FLOCKED 0x0008 /* flush lock taken */
	88	#define XFS_DQ_DIRTY 0x0010 /* dquot is dirty */
	89	#define XFS_DQ_WANT 0x0020 /* for lookup/reclaim race */
	90	#define XFS_DQ_INACTIVE 0x0040 /* dq off mplist & hashlist */
	91	#define XFS_DQ_MARKER 0x0080 /* sentinel */
	92
c8ad20ff NS	93	#define XFS_DQ_ALLTYPES (XFS_DQ_USER\|XFS_DQ_PROJ\|XFS_DQ_GROUP)
c8ad20ff NS	94
1da177e4 LT	95	/*
	96	* In the worst case, when both user and group quotas are on,
	97	* we can have a max of three dquots changing in a single transaction.
	98	*/
	99	#define XFS_DQUOT_LOGRES(mp) (sizeof(xfs_disk_dquot_t) * 3)
	100
	101
	102	/*
	103	* These are the structures used to lay out dquots and quotaoff
	104	* records on the log. Quite similar to those of inodes.
	105	*/
	106
	107	/*
	108	* log format struct for dquots.
	109	* The first two fields must be the type and size fitting into
	110	* 32 bits : log_recovery code assumes that.
	111	*/
	112	typedef struct xfs_dq_logformat {
	113	__uint16_t qlf_type; /* dquot log item type */
	114	__uint16_t qlf_size; /* size of this item */
c8ad20ff	115	xfs_dqid_t qlf_id; /* usr/grp/proj id : 32 bits */
1da177e4 LT	116	__int64_t qlf_blkno; /* blkno of dquot buffer */
	117	__int32_t qlf_len; /* len of dquot buffer */
	118	__uint32_t qlf_boffset; /* off of dquot in buffer */
	119	} xfs_dq_logformat_t;
	120
	121	/*
	122	* log format struct for QUOTAOFF records.
	123	* The first two fields must be the type and size fitting into
	124	* 32 bits : log_recovery code assumes that.
	125	* We write two LI_QUOTAOFF logitems per quotaoff, the last one keeps a pointer
	126	* to the first and ensures that the first logitem is taken out of the AIL
	127	* only when the last one is securely committed.
	128	*/
	129	typedef struct xfs_qoff_logformat {
	130	unsigned short qf_type; /* quotaoff log item type */
	131	unsigned short qf_size; /* size of this item */
	132	unsigned int qf_flags; /* USR and/or GRP */
	133	char qf_pad[12]; /* padding for future */
	134	} xfs_qoff_logformat_t;
	135
	136
	137	/*
	138	* Disk quotas status in m_qflags, and also sb_qflags. 16 bits.
	139	*/
	140	#define XFS_UQUOTA_ACCT 0x0001 /* user quota accounting ON */
	141	#define XFS_UQUOTA_ENFD 0x0002 /* user quota limits enforced */
	142	#define XFS_UQUOTA_CHKD 0x0004 /* quotacheck run on usr quotas */
c8ad20ff NS	143	#define XFS_PQUOTA_ACCT 0x0008 /* project quota accounting ON */
	144	#define XFS_OQUOTA_ENFD 0x0010 /* other (grp/prj) quota limits enforced */
	145	#define XFS_OQUOTA_CHKD 0x0020 /* quotacheck run on other (grp/prj) quotas */
1da177e4 LT	146	#define XFS_GQUOTA_ACCT 0x0040 /* group quota accounting ON */
1da177e4 LT	147
4cd4a034 TS	148	/*
	149	* Quota Accounting/Enforcement flags
	150	*/
	151	#define XFS_ALL_QUOTA_ACCT \
	152	(XFS_UQUOTA_ACCT \| XFS_GQUOTA_ACCT \| XFS_PQUOTA_ACCT)
	153	#define XFS_ALL_QUOTA_ENFD (XFS_UQUOTA_ENFD \| XFS_OQUOTA_ENFD)
	154	#define XFS_ALL_QUOTA_CHKD (XFS_UQUOTA_CHKD \| XFS_OQUOTA_CHKD)
	155
	156	#define XFS_IS_QUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_ALL_QUOTA_ACCT)
4cd4a034 TS	157	#define XFS_IS_UQUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_UQUOTA_ACCT)
	158	#define XFS_IS_PQUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_PQUOTA_ACCT)
	159	#define XFS_IS_GQUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_GQUOTA_ACCT)
e6d29426 KO	160	#define XFS_IS_UQUOTA_ENFORCED(mp) ((mp)->m_qflags & XFS_UQUOTA_ENFD)
e6d29426 KO	161	#define XFS_IS_OQUOTA_ENFORCED(mp) ((mp)->m_qflags & XFS_OQUOTA_ENFD)
4cd4a034	162
1da177e4 LT	163	/*
	164	* Incore only flags for quotaoff - these bits get cleared when quota(s)
	165	* are in the process of getting turned off. These flags are in m_qflags but
	166	* never in sb_qflags.
	167	*/
c8ad20ff NS	168	#define XFS_UQUOTA_ACTIVE 0x0100 /* uquotas are being turned off */
	169	#define XFS_PQUOTA_ACTIVE 0x0200 /* pquotas are being turned off */
	170	#define XFS_GQUOTA_ACTIVE 0x0400 /* gquotas are being turned off */
1da177e4 LT	171
	172	/*
	173	* Checking XFS_IS_*QUOTA_ON() while holding any inode lock guarantees
	174	* quota will be not be switched off as long as that inode lock is held.
	175	*/
	176	#define XFS_IS_QUOTA_ON(mp) ((mp)->m_qflags & (XFS_UQUOTA_ACTIVE \| \
c8ad20ff NS	177	XFS_GQUOTA_ACTIVE \| \
	178	XFS_PQUOTA_ACTIVE))
	179	#define XFS_IS_OQUOTA_ON(mp) ((mp)->m_qflags & (XFS_GQUOTA_ACTIVE \| \
	180	XFS_PQUOTA_ACTIVE))
1da177e4 LT	181	#define XFS_IS_UQUOTA_ON(mp) ((mp)->m_qflags & XFS_UQUOTA_ACTIVE)
1da177e4 LT	182	#define XFS_IS_GQUOTA_ON(mp) ((mp)->m_qflags & XFS_GQUOTA_ACTIVE)
c8ad20ff	183	#define XFS_IS_PQUOTA_ON(mp) ((mp)->m_qflags & XFS_PQUOTA_ACTIVE)
1da177e4 LT	184
	185	/*
	186	* Flags to tell various functions what to do. Not all of these are meaningful
	187	* to a single function. None of these XFS_QMOPT_* flags are meant to have
	188	* persistent values (ie. their values can and will change between versions)
	189	*/
	190	#define XFS_QMOPT_DQLOCK 0x0000001 /* dqlock */
	191	#define XFS_QMOPT_DQALLOC 0x0000002 /* alloc dquot ondisk if needed */
	192	#define XFS_QMOPT_UQUOTA 0x0000004 /* user dquot requested */
c8ad20ff	193	#define XFS_QMOPT_PQUOTA 0x0000008 /* project dquot requested */
1da177e4 LT	194	#define XFS_QMOPT_FORCE_RES 0x0000010 /* ignore quota limits */
	195	#define XFS_QMOPT_DQSUSER 0x0000020 /* don't cache super users dquot */
	196	#define XFS_QMOPT_SBVERSION 0x0000040 /* change superblock version num */
	197	#define XFS_QMOPT_QUOTAOFF 0x0000080 /* quotas are being turned off */
	198	#define XFS_QMOPT_UMOUNTING 0x0000100 /* filesys is being unmounted */
	199	#define XFS_QMOPT_DOLOG 0x0000200 /* log buf changes (in quotacheck) */
9a2a7de2	200	#define XFS_QMOPT_DOWARN 0x0000400 /* increase warning cnt if needed */
1da177e4	201	#define XFS_QMOPT_ILOCKED 0x0000800 /* inode is already locked (excl) */
9a2a7de2	202	#define XFS_QMOPT_DQREPAIR 0x0001000 /* repair dquot if damaged */
c8ad20ff	203	#define XFS_QMOPT_GQUOTA 0x0002000 /* group dquot requested */
9a2a7de2	204	#define XFS_QMOPT_ENOSPC 0x0004000 /* enospc instead of edquot (prj) */
1da177e4 LT	205
	206	/*
	207	* flags to xfs_trans_mod_dquot to indicate which field needs to be
	208	* modified.
	209	*/
	210	#define XFS_QMOPT_RES_REGBLKS 0x0010000
	211	#define XFS_QMOPT_RES_RTBLKS 0x0020000
	212	#define XFS_QMOPT_BCOUNT 0x0040000
	213	#define XFS_QMOPT_ICOUNT 0x0080000
	214	#define XFS_QMOPT_RTBCOUNT 0x0100000
	215	#define XFS_QMOPT_DELBCOUNT 0x0200000
	216	#define XFS_QMOPT_DELRTBCOUNT 0x0400000
	217	#define XFS_QMOPT_RES_INOS 0x0800000
	218
	219	/*
	220	* flags for dqflush and dqflush_all.
	221	*/
	222	#define XFS_QMOPT_SYNC 0x1000000
	223	#define XFS_QMOPT_ASYNC 0x2000000
	224	#define XFS_QMOPT_DELWRI 0x4000000
	225
	226	/*
	227	* flags for dqalloc.
	228	*/
	229	#define XFS_QMOPT_INHERIT 0x8000000
	230
	231	/*
	232	* flags to xfs_trans_mod_dquot.
	233	*/
	234	#define XFS_TRANS_DQ_RES_BLKS XFS_QMOPT_RES_REGBLKS
	235	#define XFS_TRANS_DQ_RES_RTBLKS XFS_QMOPT_RES_RTBLKS
	236	#define XFS_TRANS_DQ_RES_INOS XFS_QMOPT_RES_INOS
	237	#define XFS_TRANS_DQ_BCOUNT XFS_QMOPT_BCOUNT
	238	#define XFS_TRANS_DQ_DELBCOUNT XFS_QMOPT_DELBCOUNT
	239	#define XFS_TRANS_DQ_ICOUNT XFS_QMOPT_ICOUNT
	240	#define XFS_TRANS_DQ_RTBCOUNT XFS_QMOPT_RTBCOUNT
	241	#define XFS_TRANS_DQ_DELRTBCOUNT XFS_QMOPT_DELRTBCOUNT
	242
	243
c8ad20ff NS	244	#define XFS_QMOPT_QUOTALL \
c8ad20ff NS	245	(XFS_QMOPT_UQUOTA \| XFS_QMOPT_PQUOTA \| XFS_QMOPT_GQUOTA)
1da177e4 LT	246	#define XFS_QMOPT_RESBLK_MASK (XFS_QMOPT_RES_REGBLKS \| XFS_QMOPT_RES_RTBLKS)
	247
	248	#ifdef __KERNEL__
	249	/*
	250	* This check is done typically without holding the inode lock;
c41564b5	251	* that may seem racy, but it is harmless in the context that it is used.
1da177e4 LT	252	* The inode cannot go inactive as long a reference is kept, and
	253	* therefore if dquot(s) were attached, they'll stay consistent.
	254	* If, for example, the ownership of the inode changes while
	255	* we didn't have the inode locked, the appropriate dquot(s) will be
	256	* attached atomically.
	257	*/
	258	#define XFS_NOT_DQATTACHED(mp, ip) ((XFS_IS_UQUOTA_ON(mp) &&\
	259	(ip)->i_udquot == NULL) \|\| \
c8ad20ff	260	(XFS_IS_OQUOTA_ON(mp) && \
1da177e4 LT	261	(ip)->i_gdquot == NULL))
1da177e4 LT	262
c8ad20ff NS	263	#define XFS_QM_NEED_QUOTACHECK(mp) \
	264	((XFS_IS_UQUOTA_ON(mp) && \
	265	(mp->m_sb.sb_qflags & XFS_UQUOTA_CHKD) == 0) \|\| \
	266	(XFS_IS_GQUOTA_ON(mp) && \
	267	((mp->m_sb.sb_qflags & XFS_OQUOTA_CHKD) == 0 \|\| \
	268	(mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT))) \|\| \
	269	(XFS_IS_PQUOTA_ON(mp) && \
	270	((mp->m_sb.sb_qflags & XFS_OQUOTA_CHKD) == 0 \|\| \
	271	(mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT))))
1da177e4	272
c8ad20ff NS	273	#define XFS_MOUNT_QUOTA_SET1 (XFS_UQUOTA_ACCT\|XFS_UQUOTA_ENFD\|\
	274	XFS_UQUOTA_CHKD\|XFS_PQUOTA_ACCT\|\
	275	XFS_OQUOTA_ENFD\|XFS_OQUOTA_CHKD)
	276
	277	#define XFS_MOUNT_QUOTA_SET2 (XFS_UQUOTA_ACCT\|XFS_UQUOTA_ENFD\|\
1da177e4	278	XFS_UQUOTA_CHKD\|XFS_GQUOTA_ACCT\|\
c8ad20ff NS	279	XFS_OQUOTA_ENFD\|XFS_OQUOTA_CHKD)
	280
	281	#define XFS_MOUNT_QUOTA_ALL (XFS_UQUOTA_ACCT\|XFS_UQUOTA_ENFD\|\
	282	XFS_UQUOTA_CHKD\|XFS_PQUOTA_ACCT\|\
	283	XFS_OQUOTA_ENFD\|XFS_OQUOTA_CHKD\|\
	284	XFS_GQUOTA_ACCT)
1da177e4 LT	285
	286
	287	/*
	288	* The structure kept inside the xfs_trans_t keep track of dquot changes
	289	* within a transaction and apply them later.
	290	*/
	291	typedef struct xfs_dqtrx {
	292	struct xfs_dquot qt_dquot; / the dquot this refers to */
	293	ulong qt_blk_res; /* blks reserved on a dquot */
	294	ulong qt_blk_res_used; /* blks used from the reservation */
	295	ulong qt_ino_res; /* inode reserved on a dquot */
	296	ulong qt_ino_res_used; /* inodes used from the reservation */
	297	long qt_bcount_delta; /* dquot blk count changes */
	298	long qt_delbcnt_delta; /* delayed dquot blk count changes */
	299	long qt_icount_delta; /* dquot inode count changes */
	300	ulong qt_rtblk_res; /* # blks reserved on a dquot */
	301	ulong qt_rtblk_res_used;/* # blks used from reservation */
	302	long qt_rtbcount_delta;/* dquot realtime blk changes */
	303	long qt_delrtb_delta; /* delayed RT blk count changes */
	304	} xfs_dqtrx_t;
	305
	306	/*
	307	* Dquot transaction functions, used if quota is enabled.
	308	*/
	309	typedef void (qo_dup_dqinfo_t)(struct xfs_trans , struct xfs_trans *);
	310	typedef void (qo_mod_dquot_byino_t)(struct xfs_trans ,
	311	struct xfs_inode *, uint, long);
	312	typedef void (qo_free_dqinfo_t)(struct xfs_trans );
	313	typedef void (qo_apply_dquot_deltas_t)(struct xfs_trans );
	314	typedef void (qo_unreserve_and_mod_dquots_t)(struct xfs_trans );
	315	typedef int (*qo_reserve_quota_nblks_t)(
	316	struct xfs_trans , struct xfs_mount ,
	317	struct xfs_inode *, long, long, uint);
	318	typedef int (*qo_reserve_quota_bydquots_t)(
	319	struct xfs_trans , struct xfs_mount ,
	320	struct xfs_dquot , struct xfs_dquot ,
	321	long, long, uint);
	322	typedef struct xfs_dqtrxops {
	323	qo_dup_dqinfo_t qo_dup_dqinfo;
	324	qo_free_dqinfo_t qo_free_dqinfo;
	325	qo_mod_dquot_byino_t qo_mod_dquot_byino;
	326	qo_apply_dquot_deltas_t qo_apply_dquot_deltas;
	327	qo_reserve_quota_nblks_t qo_reserve_quota_nblks;
	328	qo_reserve_quota_bydquots_t qo_reserve_quota_bydquots;
	329	qo_unreserve_and_mod_dquots_t qo_unreserve_and_mod_dquots;
	330	} xfs_dqtrxops_t;
	331
	332	#define XFS_DQTRXOP(mp, tp, op, args...) \
b09cc771 CH	333	((mp)->m_qm_ops->xfs_dqtrxops ? \
b09cc771 CH	334	((mp)->m_qm_ops->xfs_dqtrxops->op)(tp, ## args) : 0)
1da177e4 LT	335
1da177e4 LT	336	#define XFS_DQTRXOP_VOID(mp, tp, op, args...) \
b09cc771 CH	337	((mp)->m_qm_ops->xfs_dqtrxops ? \
b09cc771 CH	338	((mp)->m_qm_ops->xfs_dqtrxops->op)(tp, ## args) : (void)0)
1da177e4 LT	339
	340	#define XFS_TRANS_DUP_DQINFO(mp, otp, ntp) \
	341	XFS_DQTRXOP_VOID(mp, otp, qo_dup_dqinfo, ntp)
	342	#define XFS_TRANS_FREE_DQINFO(mp, tp) \
	343	XFS_DQTRXOP_VOID(mp, tp, qo_free_dqinfo)
	344	#define XFS_TRANS_MOD_DQUOT_BYINO(mp, tp, ip, field, delta) \
	345	XFS_DQTRXOP_VOID(mp, tp, qo_mod_dquot_byino, ip, field, delta)
	346	#define XFS_TRANS_APPLY_DQUOT_DELTAS(mp, tp) \
	347	XFS_DQTRXOP_VOID(mp, tp, qo_apply_dquot_deltas)
	348	#define XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, nblks, ninos, fl) \
	349	XFS_DQTRXOP(mp, tp, qo_reserve_quota_nblks, mp, ip, nblks, ninos, fl)
	350	#define XFS_TRANS_RESERVE_QUOTA_BYDQUOTS(mp, tp, ud, gd, nb, ni, fl) \
	351	XFS_DQTRXOP(mp, tp, qo_reserve_quota_bydquots, mp, ud, gd, nb, ni, fl)
	352	#define XFS_TRANS_UNRESERVE_AND_MOD_DQUOTS(mp, tp) \
	353	XFS_DQTRXOP_VOID(mp, tp, qo_unreserve_and_mod_dquots)
	354
06d10dd9 NS	355	#define XFS_TRANS_UNRESERVE_QUOTA_NBLKS(mp, tp, ip, nblks, ninos, flags) \
06d10dd9 NS	356	XFS_TRANS_RESERVE_QUOTA_NBLKS(mp, tp, ip, -(nblks), -(ninos), flags)
1da177e4 LT	357	#define XFS_TRANS_RESERVE_QUOTA(mp, tp, ud, gd, nb, ni, f) \
	358	XFS_TRANS_RESERVE_QUOTA_BYDQUOTS(mp, tp, ud, gd, nb, ni, \
	359	f \| XFS_QMOPT_RES_REGBLKS)
	360	#define XFS_TRANS_UNRESERVE_QUOTA(mp, tp, ud, gd, nb, ni, f) \
	361	XFS_TRANS_RESERVE_QUOTA_BYDQUOTS(mp, tp, ud, gd, -(nb), -(ni), \
	362	f \| XFS_QMOPT_RES_REGBLKS)
	363
	364	extern int xfs_qm_dqcheck(xfs_disk_dquot_t , xfs_dqid_t, uint, uint, char );
4cd4a034	365	extern int xfs_mount_reset_sbqflags(struct xfs_mount *);
1da177e4	366
b09cc771	367	extern struct xfs_qmops xfs_qmcore_xfs;
1da177e4 LT	368
	369	#endif /* __KERNEL__ */
	370
	371	#endif /* __XFS_QUOTA_H__ */