[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__

#include "xfs_quota_defs.h"

/*
 * Kernel only quota definitions and functions
 */

struct xfs_trans;

/*
 * 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	/* __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
76456fc2	21	#include "xfs_quota_defs.h"
fcafb71b	22
1da177e4	23	/*
76456fc2	24	* Kernel only quota definitions and functions
1da177e4	25	*/
c8ad20ff	26
76456fc2	27	struct xfs_trans;
1da177e4	28
1da177e4 LT	29	/*
1da177e4 LT	30	* This check is done typically without holding the inode lock;
c41564b5	31	* that may seem racy, but it is harmless in the context that it is used.
1da177e4 LT	32	* The inode cannot go inactive as long a reference is kept, and
	33	* therefore if dquot(s) were attached, they'll stay consistent.
	34	* If, for example, the ownership of the inode changes while
	35	* we didn't have the inode locked, the appropriate dquot(s) will be
	36	* attached atomically.
	37	*/
92f8ff73 CS	38	#define XFS_NOT_DQATTACHED(mp, ip) \
	39	((XFS_IS_UQUOTA_ON(mp) && (ip)->i_udquot == NULL) \|\| \
	40	(XFS_IS_GQUOTA_ON(mp) && (ip)->i_gdquot == NULL) \|\| \
	41	(XFS_IS_PQUOTA_ON(mp) && (ip)->i_pdquot == NULL))
1da177e4	42
c8ad20ff NS	43	#define XFS_QM_NEED_QUOTACHECK(mp) \
	44	((XFS_IS_UQUOTA_ON(mp) && \
	45	(mp->m_sb.sb_qflags & XFS_UQUOTA_CHKD) == 0) \|\| \
	46	(XFS_IS_GQUOTA_ON(mp) && \
83e782e1	47	(mp->m_sb.sb_qflags & XFS_GQUOTA_CHKD) == 0) \|\| \
c8ad20ff	48	(XFS_IS_PQUOTA_ON(mp) && \
83e782e1	49	(mp->m_sb.sb_qflags & XFS_PQUOTA_CHKD) == 0))
1da177e4	50
c8ad20ff	51	#define XFS_MOUNT_QUOTA_ALL (XFS_UQUOTA_ACCT\|XFS_UQUOTA_ENFD\|\
83e782e1 CS	52	XFS_UQUOTA_CHKD\|XFS_GQUOTA_ACCT\|\
	53	XFS_GQUOTA_ENFD\|XFS_GQUOTA_CHKD\|\
	54	XFS_PQUOTA_ACCT\|XFS_PQUOTA_ENFD\|\
	55	XFS_PQUOTA_CHKD)
1da177e4 LT	56
	57
	58	/*
	59	* The structure kept inside the xfs_trans_t keep track of dquot changes
	60	* within a transaction and apply them later.
	61	*/
	62	typedef struct xfs_dqtrx {
	63	struct xfs_dquot qt_dquot; / the dquot this refers to */
	64	ulong qt_blk_res; /* blks reserved on a dquot */
	65	ulong qt_blk_res_used; /* blks used from the reservation */
	66	ulong qt_ino_res; /* inode reserved on a dquot */
	67	ulong qt_ino_res_used; /* inodes used from the reservation */
	68	long qt_bcount_delta; /* dquot blk count changes */
	69	long qt_delbcnt_delta; /* delayed dquot blk count changes */
	70	long qt_icount_delta; /* dquot inode count changes */
	71	ulong qt_rtblk_res; /* # blks reserved on a dquot */
	72	ulong qt_rtblk_res_used;/* # blks used from reservation */
	73	long qt_rtbcount_delta;/* dquot realtime blk changes */
	74	long qt_delrtb_delta; /* delayed RT blk count changes */
	75	} xfs_dqtrx_t;
	76
7d095257 CH	77	#ifdef CONFIG_XFS_QUOTA
	78	extern void xfs_trans_dup_dqinfo(struct xfs_trans , struct xfs_trans );
	79	extern void xfs_trans_free_dqinfo(struct xfs_trans *);
	80	extern void xfs_trans_mod_dquot_byino(struct xfs_trans , struct xfs_inode ,
	81	uint, long);
	82	extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *);
	83	extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *);
	84	extern int xfs_trans_reserve_quota_nblks(struct xfs_trans *,
	85	struct xfs_inode *, long, long, uint);
	86	extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
	87	struct xfs_mount , struct xfs_dquot ,
92f8ff73	88	struct xfs_dquot , struct xfs_dquot , long, long, uint);
7d095257 CH	89
7d095257 CH	90	extern int xfs_qm_vop_dqalloc(struct xfs_inode *, uid_t, gid_t, prid_t, uint,
92f8ff73	91	struct xfs_dquot , struct xfs_dquot , struct xfs_dquot **);
7d095257	92	extern void xfs_qm_vop_create_dqattach(struct xfs_trans , struct xfs_inode ,
92f8ff73	93	struct xfs_dquot , struct xfs_dquot , struct xfs_dquot *);
7d095257 CH	94	extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **);
	95	extern struct xfs_dquot xfs_qm_vop_chown(struct xfs_trans ,
	96	struct xfs_inode , struct xfs_dquot , struct xfs_dquot );
	97	extern int xfs_qm_vop_chown_reserve(struct xfs_trans , struct xfs_inode ,
92f8ff73 CS	98	struct xfs_dquot , struct xfs_dquot ,
92f8ff73 CS	99	struct xfs_dquot *, uint);
7d095257 CH	100	extern int xfs_qm_dqattach(struct xfs_inode *, uint);
	101	extern int xfs_qm_dqattach_locked(struct xfs_inode *, uint);
	102	extern void xfs_qm_dqdetach(struct xfs_inode *);
	103	extern void xfs_qm_dqrele(struct xfs_dquot *);
	104	extern void xfs_qm_statvfs(struct xfs_inode , struct kstatfs );
7d095257 CH	105	extern int xfs_qm_newmount(struct xfs_mount , uint , uint *);
	106	extern void xfs_qm_mount_quotas(struct xfs_mount *);
	107	extern void xfs_qm_unmount(struct xfs_mount *);
	108	extern void xfs_qm_unmount_quotas(struct xfs_mount *);
	109
	110	#else
493b87e5 CH	111	static inline int
493b87e5 CH	112	xfs_qm_vop_dqalloc(struct xfs_inode *ip, uid_t uid, gid_t gid, prid_t prid,
92f8ff73 CS	113	uint flags, struct xfs_dquot udqp, struct xfs_dquot gdqp,
92f8ff73 CS	114	struct xfs_dquot **pdqp)
493b87e5 CH	115	{
	116	*udqp = NULL;
	117	*gdqp = NULL;
92f8ff73	118	*pdqp = NULL;
493b87e5 CH	119	return 0;
493b87e5 CH	120	}
7d095257 CH	121	#define xfs_trans_dup_dqinfo(tp, tp2)
	122	#define xfs_trans_free_dqinfo(tp)
	123	#define xfs_trans_mod_dquot_byino(tp, ip, fields, delta)
	124	#define xfs_trans_apply_dquot_deltas(tp)
	125	#define xfs_trans_unreserve_and_mod_dquots(tp)
5d2bf8a5 CH	126	static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp,
	127	struct xfs_inode *ip, long nblks, long ninos, uint flags)
	128	{
	129	return 0;
	130	}
	131	static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
	132	struct xfs_mount mp, struct xfs_dquot udqp,
92f8ff73 CS	133	struct xfs_dquot gdqp, struct xfs_dquot pdqp,
92f8ff73 CS	134	long nblks, long nions, uint flags)
5d2bf8a5 CH	135	{
	136	return 0;
	137	}
92f8ff73	138	#define xfs_qm_vop_create_dqattach(tp, ip, u, g, p)
7d095257 CH	139	#define xfs_qm_vop_rename_dqattach(it) (0)
7d095257 CH	140	#define xfs_qm_vop_chown(tp, ip, old, new) (NULL)
92f8ff73	141	#define xfs_qm_vop_chown_reserve(tp, ip, u, g, p, fl) (0)
7d095257 CH	142	#define xfs_qm_dqattach(ip, fl) (0)
	143	#define xfs_qm_dqattach_locked(ip, fl) (0)
	144	#define xfs_qm_dqdetach(ip)
	145	#define xfs_qm_dqrele(d)
	146	#define xfs_qm_statvfs(ip, s)
7d095257 CH	147	#define xfs_qm_newmount(mp, a, b) (0)
	148	#define xfs_qm_mount_quotas(mp)
	149	#define xfs_qm_unmount(mp)
5d2bf8a5	150	#define xfs_qm_unmount_quotas(mp)
7d095257 CH	151	#endif /* CONFIG_XFS_QUOTA */
	152
	153	#define xfs_trans_unreserve_quota_nblks(tp, ip, nblks, ninos, flags) \
	154	xfs_trans_reserve_quota_nblks(tp, ip, -(nblks), -(ninos), flags)
92f8ff73 CS	155	#define xfs_trans_reserve_quota(tp, mp, ud, gd, pd, nb, ni, f) \
92f8ff73 CS	156	xfs_trans_reserve_quota_bydquots(tp, mp, ud, gd, pd, nb, ni, \
1da177e4 LT	157	f \| XFS_QMOPT_RES_REGBLKS)
1da177e4 LT	158
a0fa2b67 DC	159	extern int xfs_qm_dqcheck(struct xfs_mount , xfs_disk_dquot_t ,
a0fa2b67 DC	160	xfs_dqid_t, uint, uint, char *);
4cd4a034	161	extern int xfs_mount_reset_sbqflags(struct xfs_mount *);
1da177e4	162
3fe58f30 CH	163	extern const struct xfs_buf_ops xfs_dquot_buf_ops;
3fe58f30 CH	164
1da177e4	165	#endif /* __XFS_QUOTA_H__ */