[mirror_ubuntu-bionic-kernel.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))

/*
 * 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 *, xfs_dqid_t, xfs_dqid_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, xfs_dqid_t uid, xfs_dqid_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
1da177e4 LT	51	/*
	52	* The structure kept inside the xfs_trans_t keep track of dquot changes
	53	* within a transaction and apply them later.
	54	*/
	55	typedef struct xfs_dqtrx {
	56	struct xfs_dquot qt_dquot; / the dquot this refers to */
	57	ulong qt_blk_res; /* blks reserved on a dquot */
	58	ulong qt_blk_res_used; /* blks used from the reservation */
	59	ulong qt_ino_res; /* inode reserved on a dquot */
	60	ulong qt_ino_res_used; /* inodes used from the reservation */
	61	long qt_bcount_delta; /* dquot blk count changes */
	62	long qt_delbcnt_delta; /* delayed dquot blk count changes */
	63	long qt_icount_delta; /* dquot inode count changes */
	64	ulong qt_rtblk_res; /* # blks reserved on a dquot */
	65	ulong qt_rtblk_res_used;/* # blks used from reservation */
	66	long qt_rtbcount_delta;/* dquot realtime blk changes */
	67	long qt_delrtb_delta; /* delayed RT blk count changes */
	68	} xfs_dqtrx_t;
	69
7d095257 CH	70	#ifdef CONFIG_XFS_QUOTA
	71	extern void xfs_trans_dup_dqinfo(struct xfs_trans , struct xfs_trans );
	72	extern void xfs_trans_free_dqinfo(struct xfs_trans *);
	73	extern void xfs_trans_mod_dquot_byino(struct xfs_trans , struct xfs_inode ,
	74	uint, long);
	75	extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *);
	76	extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *);
	77	extern int xfs_trans_reserve_quota_nblks(struct xfs_trans *,
	78	struct xfs_inode *, long, long, uint);
	79	extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
	80	struct xfs_mount , struct xfs_dquot ,
92f8ff73	81	struct xfs_dquot , struct xfs_dquot , long, long, uint);
7d095257	82
7aab1b28 DE	83	extern int xfs_qm_vop_dqalloc(struct xfs_inode *, xfs_dqid_t, xfs_dqid_t,
	84	prid_t, uint, struct xfs_dquot , struct xfs_dquot ,
	85	struct xfs_dquot **);
7d095257	86	extern void xfs_qm_vop_create_dqattach(struct xfs_trans , struct xfs_inode ,
92f8ff73	87	struct xfs_dquot , struct xfs_dquot , struct xfs_dquot *);
7d095257 CH	88	extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **);
	89	extern struct xfs_dquot xfs_qm_vop_chown(struct xfs_trans ,
	90	struct xfs_inode , struct xfs_dquot , struct xfs_dquot );
	91	extern int xfs_qm_vop_chown_reserve(struct xfs_trans , struct xfs_inode ,
92f8ff73 CS	92	struct xfs_dquot , struct xfs_dquot ,
92f8ff73 CS	93	struct xfs_dquot *, uint);
7d095257 CH	94	extern int xfs_qm_dqattach(struct xfs_inode *, uint);
	95	extern int xfs_qm_dqattach_locked(struct xfs_inode *, uint);
	96	extern void xfs_qm_dqdetach(struct xfs_inode *);
	97	extern void xfs_qm_dqrele(struct xfs_dquot *);
	98	extern void xfs_qm_statvfs(struct xfs_inode , struct kstatfs );
7d095257 CH	99	extern int xfs_qm_newmount(struct xfs_mount , uint , uint *);
	100	extern void xfs_qm_mount_quotas(struct xfs_mount *);
	101	extern void xfs_qm_unmount(struct xfs_mount *);
	102	extern void xfs_qm_unmount_quotas(struct xfs_mount *);
	103
	104	#else
493b87e5	105	static inline int
7aab1b28 DE	106	xfs_qm_vop_dqalloc(struct xfs_inode *ip, xfs_dqid_t uid, xfs_dqid_t gid,
	107	prid_t prid, uint flags, struct xfs_dquot **udqp,
	108	struct xfs_dquot gdqp, struct xfs_dquot pdqp)
493b87e5 CH	109	{
	110	*udqp = NULL;
	111	*gdqp = NULL;
92f8ff73	112	*pdqp = NULL;
493b87e5 CH	113	return 0;
493b87e5 CH	114	}
7d095257 CH	115	#define xfs_trans_dup_dqinfo(tp, tp2)
	116	#define xfs_trans_free_dqinfo(tp)
	117	#define xfs_trans_mod_dquot_byino(tp, ip, fields, delta)
	118	#define xfs_trans_apply_dquot_deltas(tp)
	119	#define xfs_trans_unreserve_and_mod_dquots(tp)
5d2bf8a5 CH	120	static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp,
	121	struct xfs_inode *ip, long nblks, long ninos, uint flags)
	122	{
	123	return 0;
	124	}
	125	static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
	126	struct xfs_mount mp, struct xfs_dquot udqp,
92f8ff73 CS	127	struct xfs_dquot gdqp, struct xfs_dquot pdqp,
92f8ff73 CS	128	long nblks, long nions, uint flags)
5d2bf8a5 CH	129	{
	130	return 0;
	131	}
92f8ff73	132	#define xfs_qm_vop_create_dqattach(tp, ip, u, g, p)
7d095257 CH	133	#define xfs_qm_vop_rename_dqattach(it) (0)
7d095257 CH	134	#define xfs_qm_vop_chown(tp, ip, old, new) (NULL)
92f8ff73	135	#define xfs_qm_vop_chown_reserve(tp, ip, u, g, p, fl) (0)
7d095257 CH	136	#define xfs_qm_dqattach(ip, fl) (0)
	137	#define xfs_qm_dqattach_locked(ip, fl) (0)
	138	#define xfs_qm_dqdetach(ip)
	139	#define xfs_qm_dqrele(d)
	140	#define xfs_qm_statvfs(ip, s)
7d095257 CH	141	#define xfs_qm_newmount(mp, a, b) (0)
	142	#define xfs_qm_mount_quotas(mp)
	143	#define xfs_qm_unmount(mp)
5d2bf8a5	144	#define xfs_qm_unmount_quotas(mp)
7d095257 CH	145	#endif /* CONFIG_XFS_QUOTA */
	146
	147	#define xfs_trans_unreserve_quota_nblks(tp, ip, nblks, ninos, flags) \
	148	xfs_trans_reserve_quota_nblks(tp, ip, -(nblks), -(ninos), flags)
92f8ff73 CS	149	#define xfs_trans_reserve_quota(tp, mp, ud, gd, pd, nb, ni, f) \
92f8ff73 CS	150	xfs_trans_reserve_quota_bydquots(tp, mp, ud, gd, pd, nb, ni, \
1da177e4 LT	151	f \| XFS_QMOPT_RES_REGBLKS)
1da177e4 LT	152
a0fa2b67 DC	153	extern int xfs_qm_dqcheck(struct xfs_mount , xfs_disk_dquot_t ,
a0fa2b67 DC	154	xfs_dqid_t, uint, uint, char *);
4cd4a034	155	extern int xfs_mount_reset_sbqflags(struct xfs_mount *);
1da177e4	156
3fe58f30 CH	157	extern const struct xfs_buf_ops xfs_dquot_buf_ops;
3fe58f30 CH	158
1da177e4	159	#endif /* __XFS_QUOTA_H__ */