[deliverable/linux.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__

struct xfs_trans;

/*
 * 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_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" }

/*
 * 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_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_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_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;

#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 *, 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 **);
extern void xfs_qm_vop_create_dqattach(struct xfs_trans *, struct xfs_inode *,
		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 *, 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)
{
	*udqp = NULL;
	*gdqp = 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, long nblks, long nions, uint flags)
{
	return 0;
}
#define xfs_qm_vop_create_dqattach(tp, ip, u, g)
#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, 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, nb, ni, f) \
	xfs_trans_reserve_quota_bydquots(tp, mp, ud, gd, 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 *);

#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
fcafb71b CH	21	struct xfs_trans;
fcafb71b CH	22
1da177e4 LT	23	/*
	24	* The ondisk form of a dquot structure.
	25	*/
	26	#define XFS_DQUOT_MAGIC 0x4451 /* 'DQ' */
	27	#define XFS_DQUOT_VERSION (u_int8_t)0x01 /* latest version number */
	28
	29	/*
	30	* uid_t and gid_t are hard-coded to 32 bits in the inode.
	31	* Hence, an 'id' in a dquot is 32 bits..
	32	*/
c310ab6c	33	typedef __uint32_t xfs_dqid_t;
1da177e4 LT	34
1da177e4 LT	35	/*
c41564b5	36	* Even though users may not have quota limits occupying all 64-bits,
1da177e4 LT	37	* they may need 64-bit accounting. Hence, 64-bit quota-counters,
	38	* and quota-limits. This is a waste in the common case, but hey ...
	39	*/
	40	typedef __uint64_t xfs_qcnt_t;
	41	typedef __uint16_t xfs_qwarncnt_t;
	42
	43	/*
	44	* This is the main portion of the on-disk representation of quota
	45	* information for a user. This is the q_core of the xfs_dquot_t that
	46	* is kept in kernel memory. We pad this with some more expansion room
	47	* to construct the on disk structure.
	48	*/
	49	typedef struct xfs_disk_dquot {
1149d96a CH	50	__be16 d_magic; /* dquot magic = XFS_DQUOT_MAGIC */
	51	__u8 d_version; /* dquot version */
	52	__u8 d_flags; /* XFS_DQ_USER/PROJ/GROUP */
	53	__be32 d_id; /* user,project,group id */
	54	__be64 d_blk_hardlimit;/* absolute limit on disk blks */
	55	__be64 d_blk_softlimit;/* preferred limit on disk blks */
	56	__be64 d_ino_hardlimit;/* maximum # allocated inodes */
	57	__be64 d_ino_softlimit;/* preferred inode limit */
	58	__be64 d_bcount; /* disk blocks owned by the user */
	59	__be64 d_icount; /* inodes owned by the user */
	60	__be32 d_itimer; /* zero if within inode limits if not,
1da177e4	61	this is when we refuse service */
1149d96a CH	62	__be32 d_btimer; /* similar to above; for disk blocks */
	63	__be16 d_iwarns; /* warnings issued wrt num inodes */
	64	__be16 d_bwarns; /* warnings issued wrt disk blocks */
	65	__be32 d_pad0; /* 64 bit align */
	66	__be64 d_rtb_hardlimit;/* absolute limit on realtime blks */
	67	__be64 d_rtb_softlimit;/* preferred limit on RT disk blks */
	68	__be64 d_rtbcount; /* realtime blocks owned */
	69	__be32 d_rtbtimer; /* similar to above; for RT disk blocks */
	70	__be16 d_rtbwarns; /* warnings issued wrt RT disk blocks */
	71	__be16 d_pad;
1da177e4 LT	72	} xfs_disk_dquot_t;
	73
	74	/*
	75	* This is what goes on disk. This is separated from the xfs_disk_dquot because
	76	* carrying the unnecessary padding would be a waste of memory.
	77	*/
	78	typedef struct xfs_dqblk {
	79	xfs_disk_dquot_t dd_diskdq; /* portion that lives incore as well */
	80	char dd_fill[32]; /* filling for posterity */
	81	} xfs_dqblk_t;
	82
	83	/*
	84	* flags for q_flags field in the dquot.
	85	*/
	86	#define XFS_DQ_USER 0x0001 /* a user quota */
c8ad20ff	87	#define XFS_DQ_PROJ 0x0002 /* project quota */
1da177e4	88	#define XFS_DQ_GROUP 0x0004 /* a group quota */
df6771bd	89	#define XFS_DQ_DIRTY 0x0008 /* dquot is dirty */
92678554	90	#define XFS_DQ_FREEING 0x0010 /* dquot is beeing torn down */
1da177e4	91
c8ad20ff NS	92	#define XFS_DQ_ALLTYPES (XFS_DQ_USER\|XFS_DQ_PROJ\|XFS_DQ_GROUP)
c8ad20ff NS	93
0b1b213f CH	94	#define XFS_DQ_FLAGS \
	95	{ XFS_DQ_USER, "USER" }, \
	96	{ XFS_DQ_PROJ, "PROJ" }, \
	97	{ XFS_DQ_GROUP, "GROUP" }, \
92678554 CH	98	{ XFS_DQ_DIRTY, "DIRTY" }, \
92678554 CH	99	{ XFS_DQ_FREEING, "FREEING" }
0b1b213f	100
1da177e4 LT	101	/*
	102	* In the worst case, when both user and group quotas are on,
	103	* we can have a max of three dquots changing in a single transaction.
	104	*/
	105	#define XFS_DQUOT_LOGRES(mp) (sizeof(xfs_disk_dquot_t) * 3)
	106
	107
	108	/*
	109	* These are the structures used to lay out dquots and quotaoff
	110	* records on the log. Quite similar to those of inodes.
	111	*/
	112
	113	/*
	114	* log format struct for dquots.
	115	* The first two fields must be the type and size fitting into
	116	* 32 bits : log_recovery code assumes that.
	117	*/
	118	typedef struct xfs_dq_logformat {
	119	__uint16_t qlf_type; /* dquot log item type */
	120	__uint16_t qlf_size; /* size of this item */
c8ad20ff	121	xfs_dqid_t qlf_id; /* usr/grp/proj id : 32 bits */
1da177e4 LT	122	__int64_t qlf_blkno; /* blkno of dquot buffer */
	123	__int32_t qlf_len; /* len of dquot buffer */
	124	__uint32_t qlf_boffset; /* off of dquot in buffer */
	125	} xfs_dq_logformat_t;
	126
	127	/*
	128	* log format struct for QUOTAOFF records.
	129	* The first two fields must be the type and size fitting into
	130	* 32 bits : log_recovery code assumes that.
	131	* We write two LI_QUOTAOFF logitems per quotaoff, the last one keeps a pointer
	132	* to the first and ensures that the first logitem is taken out of the AIL
	133	* only when the last one is securely committed.
	134	*/
	135	typedef struct xfs_qoff_logformat {
	136	unsigned short qf_type; /* quotaoff log item type */
	137	unsigned short qf_size; /* size of this item */
	138	unsigned int qf_flags; /* USR and/or GRP */
	139	char qf_pad[12]; /* padding for future */
	140	} xfs_qoff_logformat_t;
	141
	142
	143	/*
	144	* Disk quotas status in m_qflags, and also sb_qflags. 16 bits.
	145	*/
	146	#define XFS_UQUOTA_ACCT 0x0001 /* user quota accounting ON */
	147	#define XFS_UQUOTA_ENFD 0x0002 /* user quota limits enforced */
	148	#define XFS_UQUOTA_CHKD 0x0004 /* quotacheck run on usr quotas */
c8ad20ff NS	149	#define XFS_PQUOTA_ACCT 0x0008 /* project quota accounting ON */
	150	#define XFS_OQUOTA_ENFD 0x0010 /* other (grp/prj) quota limits enforced */
	151	#define XFS_OQUOTA_CHKD 0x0020 /* quotacheck run on other (grp/prj) quotas */
1da177e4 LT	152	#define XFS_GQUOTA_ACCT 0x0040 /* group quota accounting ON */
1da177e4 LT	153
4cd4a034 TS	154	/*
	155	* Quota Accounting/Enforcement flags
	156	*/
	157	#define XFS_ALL_QUOTA_ACCT \
	158	(XFS_UQUOTA_ACCT \| XFS_GQUOTA_ACCT \| XFS_PQUOTA_ACCT)
	159	#define XFS_ALL_QUOTA_ENFD (XFS_UQUOTA_ENFD \| XFS_OQUOTA_ENFD)
	160	#define XFS_ALL_QUOTA_CHKD (XFS_UQUOTA_CHKD \| XFS_OQUOTA_CHKD)
	161
	162	#define XFS_IS_QUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_ALL_QUOTA_ACCT)
4cd4a034 TS	163	#define XFS_IS_UQUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_UQUOTA_ACCT)
	164	#define XFS_IS_PQUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_PQUOTA_ACCT)
	165	#define XFS_IS_GQUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_GQUOTA_ACCT)
e6d29426 KO	166	#define XFS_IS_UQUOTA_ENFORCED(mp) ((mp)->m_qflags & XFS_UQUOTA_ENFD)
e6d29426 KO	167	#define XFS_IS_OQUOTA_ENFORCED(mp) ((mp)->m_qflags & XFS_OQUOTA_ENFD)
4cd4a034	168
1da177e4 LT	169	/*
	170	* Incore only flags for quotaoff - these bits get cleared when quota(s)
	171	* are in the process of getting turned off. These flags are in m_qflags but
	172	* never in sb_qflags.
	173	*/
c8ad20ff NS	174	#define XFS_UQUOTA_ACTIVE 0x0100 /* uquotas are being turned off */
	175	#define XFS_PQUOTA_ACTIVE 0x0200 /* pquotas are being turned off */
	176	#define XFS_GQUOTA_ACTIVE 0x0400 /* gquotas are being turned off */
1da177e4 LT	177
	178	/*
	179	* Checking XFS_IS_*QUOTA_ON() while holding any inode lock guarantees
	180	* quota will be not be switched off as long as that inode lock is held.
	181	*/
	182	#define XFS_IS_QUOTA_ON(mp) ((mp)->m_qflags & (XFS_UQUOTA_ACTIVE \| \
c8ad20ff NS	183	XFS_GQUOTA_ACTIVE \| \
	184	XFS_PQUOTA_ACTIVE))
	185	#define XFS_IS_OQUOTA_ON(mp) ((mp)->m_qflags & (XFS_GQUOTA_ACTIVE \| \
	186	XFS_PQUOTA_ACTIVE))
1da177e4 LT	187	#define XFS_IS_UQUOTA_ON(mp) ((mp)->m_qflags & XFS_UQUOTA_ACTIVE)
1da177e4 LT	188	#define XFS_IS_GQUOTA_ON(mp) ((mp)->m_qflags & XFS_GQUOTA_ACTIVE)
c8ad20ff	189	#define XFS_IS_PQUOTA_ON(mp) ((mp)->m_qflags & XFS_PQUOTA_ACTIVE)
1da177e4 LT	190
	191	/*
	192	* Flags to tell various functions what to do. Not all of these are meaningful
	193	* to a single function. None of these XFS_QMOPT_* flags are meant to have
	194	* persistent values (ie. their values can and will change between versions)
	195	*/
1da177e4 LT	196	#define XFS_QMOPT_DQALLOC 0x0000002 /* alloc dquot ondisk if needed */
1da177e4 LT	197	#define XFS_QMOPT_UQUOTA 0x0000004 /* user dquot requested */
c8ad20ff	198	#define XFS_QMOPT_PQUOTA 0x0000008 /* project dquot requested */
1da177e4 LT	199	#define XFS_QMOPT_FORCE_RES 0x0000010 /* ignore quota limits */
	200	#define XFS_QMOPT_DQSUSER 0x0000020 /* don't cache super users dquot */
	201	#define XFS_QMOPT_SBVERSION 0x0000040 /* change superblock version num */
9a2a7de2	202	#define XFS_QMOPT_DOWARN 0x0000400 /* increase warning cnt if needed */
9a2a7de2	203	#define XFS_QMOPT_DQREPAIR 0x0001000 /* repair dquot if damaged */
c8ad20ff	204	#define XFS_QMOPT_GQUOTA 0x0002000 /* group dquot requested */
9a2a7de2	205	#define XFS_QMOPT_ENOSPC 0x0004000 /* enospc instead of edquot (prj) */
1da177e4 LT	206
	207	/*
	208	* flags to xfs_trans_mod_dquot to indicate which field needs to be
	209	* modified.
	210	*/
	211	#define XFS_QMOPT_RES_REGBLKS 0x0010000
	212	#define XFS_QMOPT_RES_RTBLKS 0x0020000
	213	#define XFS_QMOPT_BCOUNT 0x0040000
	214	#define XFS_QMOPT_ICOUNT 0x0080000
	215	#define XFS_QMOPT_RTBCOUNT 0x0100000
	216	#define XFS_QMOPT_DELBCOUNT 0x0200000
	217	#define XFS_QMOPT_DELRTBCOUNT 0x0400000
	218	#define XFS_QMOPT_RES_INOS 0x0800000
	219
1da177e4 LT	220	/*
	221	* flags for dqalloc.
	222	*/
20026d92	223	#define XFS_QMOPT_INHERIT 0x1000000
1da177e4 LT	224
	225	/*
	226	* flags to xfs_trans_mod_dquot.
	227	*/
	228	#define XFS_TRANS_DQ_RES_BLKS XFS_QMOPT_RES_REGBLKS
	229	#define XFS_TRANS_DQ_RES_RTBLKS XFS_QMOPT_RES_RTBLKS
	230	#define XFS_TRANS_DQ_RES_INOS XFS_QMOPT_RES_INOS
	231	#define XFS_TRANS_DQ_BCOUNT XFS_QMOPT_BCOUNT
	232	#define XFS_TRANS_DQ_DELBCOUNT XFS_QMOPT_DELBCOUNT
	233	#define XFS_TRANS_DQ_ICOUNT XFS_QMOPT_ICOUNT
	234	#define XFS_TRANS_DQ_RTBCOUNT XFS_QMOPT_RTBCOUNT
	235	#define XFS_TRANS_DQ_DELRTBCOUNT XFS_QMOPT_DELRTBCOUNT
	236
	237
c8ad20ff NS	238	#define XFS_QMOPT_QUOTALL \
c8ad20ff NS	239	(XFS_QMOPT_UQUOTA \| XFS_QMOPT_PQUOTA \| XFS_QMOPT_GQUOTA)
1da177e4 LT	240	#define XFS_QMOPT_RESBLK_MASK (XFS_QMOPT_RES_REGBLKS \| XFS_QMOPT_RES_RTBLKS)
	241
	242	#ifdef __KERNEL__
	243	/*
	244	* This check is done typically without holding the inode lock;
c41564b5	245	* that may seem racy, but it is harmless in the context that it is used.
1da177e4 LT	246	* The inode cannot go inactive as long a reference is kept, and
	247	* therefore if dquot(s) were attached, they'll stay consistent.
	248	* If, for example, the ownership of the inode changes while
	249	* we didn't have the inode locked, the appropriate dquot(s) will be
	250	* attached atomically.
	251	*/
	252	#define XFS_NOT_DQATTACHED(mp, ip) ((XFS_IS_UQUOTA_ON(mp) &&\
	253	(ip)->i_udquot == NULL) \|\| \
c8ad20ff	254	(XFS_IS_OQUOTA_ON(mp) && \
1da177e4 LT	255	(ip)->i_gdquot == NULL))
1da177e4 LT	256
c8ad20ff NS	257	#define XFS_QM_NEED_QUOTACHECK(mp) \
	258	((XFS_IS_UQUOTA_ON(mp) && \
	259	(mp->m_sb.sb_qflags & XFS_UQUOTA_CHKD) == 0) \|\| \
	260	(XFS_IS_GQUOTA_ON(mp) && \
	261	((mp->m_sb.sb_qflags & XFS_OQUOTA_CHKD) == 0 \|\| \
	262	(mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT))) \|\| \
	263	(XFS_IS_PQUOTA_ON(mp) && \
	264	((mp->m_sb.sb_qflags & XFS_OQUOTA_CHKD) == 0 \|\| \
	265	(mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT))))
1da177e4	266
c8ad20ff NS	267	#define XFS_MOUNT_QUOTA_SET1 (XFS_UQUOTA_ACCT\|XFS_UQUOTA_ENFD\|\
	268	XFS_UQUOTA_CHKD\|XFS_PQUOTA_ACCT\|\
	269	XFS_OQUOTA_ENFD\|XFS_OQUOTA_CHKD)
	270
	271	#define XFS_MOUNT_QUOTA_SET2 (XFS_UQUOTA_ACCT\|XFS_UQUOTA_ENFD\|\
1da177e4	272	XFS_UQUOTA_CHKD\|XFS_GQUOTA_ACCT\|\
c8ad20ff NS	273	XFS_OQUOTA_ENFD\|XFS_OQUOTA_CHKD)
	274
	275	#define XFS_MOUNT_QUOTA_ALL (XFS_UQUOTA_ACCT\|XFS_UQUOTA_ENFD\|\
	276	XFS_UQUOTA_CHKD\|XFS_PQUOTA_ACCT\|\
	277	XFS_OQUOTA_ENFD\|XFS_OQUOTA_CHKD\|\
	278	XFS_GQUOTA_ACCT)
1da177e4 LT	279
	280
	281	/*
	282	* The structure kept inside the xfs_trans_t keep track of dquot changes
	283	* within a transaction and apply them later.
	284	*/
	285	typedef struct xfs_dqtrx {
	286	struct xfs_dquot qt_dquot; / the dquot this refers to */
	287	ulong qt_blk_res; /* blks reserved on a dquot */
	288	ulong qt_blk_res_used; /* blks used from the reservation */
	289	ulong qt_ino_res; /* inode reserved on a dquot */
	290	ulong qt_ino_res_used; /* inodes used from the reservation */
	291	long qt_bcount_delta; /* dquot blk count changes */
	292	long qt_delbcnt_delta; /* delayed dquot blk count changes */
	293	long qt_icount_delta; /* dquot inode count changes */
	294	ulong qt_rtblk_res; /* # blks reserved on a dquot */
	295	ulong qt_rtblk_res_used;/* # blks used from reservation */
	296	long qt_rtbcount_delta;/* dquot realtime blk changes */
	297	long qt_delrtb_delta; /* delayed RT blk count changes */
	298	} xfs_dqtrx_t;
	299
7d095257 CH	300	#ifdef CONFIG_XFS_QUOTA
	301	extern void xfs_trans_dup_dqinfo(struct xfs_trans , struct xfs_trans );
	302	extern void xfs_trans_free_dqinfo(struct xfs_trans *);
	303	extern void xfs_trans_mod_dquot_byino(struct xfs_trans , struct xfs_inode ,
	304	uint, long);
	305	extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *);
	306	extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *);
	307	extern int xfs_trans_reserve_quota_nblks(struct xfs_trans *,
	308	struct xfs_inode *, long, long, uint);
	309	extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
	310	struct xfs_mount , struct xfs_dquot ,
	311	struct xfs_dquot *, long, long, uint);
	312
	313	extern int xfs_qm_vop_dqalloc(struct xfs_inode *, uid_t, gid_t, prid_t, uint,
	314	struct xfs_dquot , struct xfs_dquot );
	315	extern void xfs_qm_vop_create_dqattach(struct xfs_trans , struct xfs_inode ,
	316	struct xfs_dquot , struct xfs_dquot );
	317	extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **);
	318	extern struct xfs_dquot xfs_qm_vop_chown(struct xfs_trans ,
	319	struct xfs_inode , struct xfs_dquot , struct xfs_dquot );
	320	extern int xfs_qm_vop_chown_reserve(struct xfs_trans , struct xfs_inode ,
	321	struct xfs_dquot , struct xfs_dquot , uint);
	322	extern int xfs_qm_dqattach(struct xfs_inode *, uint);
	323	extern int xfs_qm_dqattach_locked(struct xfs_inode *, uint);
	324	extern void xfs_qm_dqdetach(struct xfs_inode *);
	325	extern void xfs_qm_dqrele(struct xfs_dquot *);
	326	extern void xfs_qm_statvfs(struct xfs_inode , struct kstatfs );
7d095257 CH	327	extern int xfs_qm_newmount(struct xfs_mount , uint , uint *);
	328	extern void xfs_qm_mount_quotas(struct xfs_mount *);
	329	extern void xfs_qm_unmount(struct xfs_mount *);
	330	extern void xfs_qm_unmount_quotas(struct xfs_mount *);
	331
	332	#else
493b87e5 CH	333	static inline int
	334	xfs_qm_vop_dqalloc(struct xfs_inode *ip, uid_t uid, gid_t gid, prid_t prid,
	335	uint flags, struct xfs_dquot udqp, struct xfs_dquot gdqp)
	336	{
	337	*udqp = NULL;
	338	*gdqp = NULL;
	339	return 0;
	340	}
7d095257 CH	341	#define xfs_trans_dup_dqinfo(tp, tp2)
	342	#define xfs_trans_free_dqinfo(tp)
	343	#define xfs_trans_mod_dquot_byino(tp, ip, fields, delta)
	344	#define xfs_trans_apply_dquot_deltas(tp)
	345	#define xfs_trans_unreserve_and_mod_dquots(tp)
5d2bf8a5 CH	346	static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp,
	347	struct xfs_inode *ip, long nblks, long ninos, uint flags)
	348	{
	349	return 0;
	350	}
	351	static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
	352	struct xfs_mount mp, struct xfs_dquot udqp,
	353	struct xfs_dquot *gdqp, long nblks, long nions, uint flags)
	354	{
	355	return 0;
	356	}
7d095257 CH	357	#define xfs_qm_vop_create_dqattach(tp, ip, u, g)
	358	#define xfs_qm_vop_rename_dqattach(it) (0)
	359	#define xfs_qm_vop_chown(tp, ip, old, new) (NULL)
	360	#define xfs_qm_vop_chown_reserve(tp, ip, u, g, fl) (0)
	361	#define xfs_qm_dqattach(ip, fl) (0)
	362	#define xfs_qm_dqattach_locked(ip, fl) (0)
	363	#define xfs_qm_dqdetach(ip)
	364	#define xfs_qm_dqrele(d)
	365	#define xfs_qm_statvfs(ip, s)
7d095257 CH	366	#define xfs_qm_newmount(mp, a, b) (0)
	367	#define xfs_qm_mount_quotas(mp)
	368	#define xfs_qm_unmount(mp)
5d2bf8a5	369	#define xfs_qm_unmount_quotas(mp)
7d095257 CH	370	#endif /* CONFIG_XFS_QUOTA */
	371
	372	#define xfs_trans_unreserve_quota_nblks(tp, ip, nblks, ninos, flags) \
	373	xfs_trans_reserve_quota_nblks(tp, ip, -(nblks), -(ninos), flags)
	374	#define xfs_trans_reserve_quota(tp, mp, ud, gd, nb, ni, f) \
	375	xfs_trans_reserve_quota_bydquots(tp, mp, ud, gd, nb, ni, \
1da177e4 LT	376	f \| XFS_QMOPT_RES_REGBLKS)
1da177e4 LT	377
a0fa2b67 DC	378	extern int xfs_qm_dqcheck(struct xfs_mount , xfs_disk_dquot_t ,
a0fa2b67 DC	379	xfs_dqid_t, uint, uint, char *);
4cd4a034	380	extern int xfs_mount_reset_sbqflags(struct xfs_mount *);
1da177e4	381
1da177e4	382	#endif /* __KERNEL__ */
1da177e4	383	#endif /* __XFS_QUOTA_H__ */