fs/xfs/quota/xfs_qm.h - kernel/msm - Gitiles

 /*
  * 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 version 2 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.
  *
  * Further, this software is distributed without any warranty that it is
  * free of the rightful claim of any third person regarding infringement
  * or the like.	 Any license provided herein, whether implied or
  * otherwise, applies only to this software file.  Patent licenses, if
  * any, provided herein do not apply to combinations of this program with
  * other software, or any other product whatsoever.
  *
  * You should have received a copy of the GNU General Public License along
  * with this program; if not, write the Free Software Foundation, Inc., 59
  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  *
  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  * Mountain View, CA  94043, or:
  *
  * http://www.sgi.com
  *
  * For further information regarding this notice, see:
  *
  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  */
 #ifndef __XFS_QM_H__
 #define __XFS_QM_H__

 #include "xfs_dquot_item.h"
 #include "xfs_dquot.h"
 #include "xfs_quota_priv.h"
 #include "xfs_qm_stats.h"

 struct xfs_qm;
 struct xfs_inode;

 extern mutex_t		xfs_Gqm_lock;
 extern struct xfs_qm	*xfs_Gqm;
 extern kmem_zone_t	*qm_dqzone;
 extern kmem_zone_t	*qm_dqtrxzone;

 /*
  * Used in xfs_qm_sync called by xfs_sync to count the max times that it can
  * iterate over the mountpt's dquot list in one call.
  */
 #define XFS_QM_SYNC_MAX_RESTARTS	7

 /*
  * Ditto, for xfs_qm_dqreclaim_one.
  */
 #define XFS_QM_RECLAIM_MAX_RESTARTS	4

 /*
  * Ideal ratio of free to in use dquots. Quota manager makes an attempt
  * to keep this balance.
  */
 #define XFS_QM_DQFREE_RATIO		2

 /*
  * Dquot hashtable constants/threshold values.
  */
 #define XFS_QM_NCSIZE_THRESHOLD		5000
 #define XFS_QM_HASHSIZE_LOW		32
 #define XFS_QM_HASHSIZE_HIGH		64

 /*
  * We output a cmn_err when quotachecking a quota file with more than
  * this many fsbs.
  */
 #define XFS_QM_BIG_QCHECK_NBLKS		500

 /*
  * This defines the unit of allocation of dquots.
  * Currently, it is just one file system block, and a 4K blk contains 30
  * (136 * 30 = 4080) dquots. It's probably not worth trying to make
  * this more dynamic.
  * XXXsup However, if this number is changed, we have to make sure that we don't
  * implicitly assume that we do allocations in chunks of a single filesystem
  * block in the dquot/xqm code.
  */
 #define XFS_DQUOT_CLUSTER_SIZE_FSB	(xfs_filblks_t)1
 /*
  * When doing a quotacheck, we log dquot clusters of this many FSBs at most
  * in a single transaction. We don't want to ask for too huge a log reservation.
  */
 #define XFS_QM_MAX_DQCLUSTER_LOGSZ	3

 typedef xfs_dqhash_t	xfs_dqlist_t;
 /*
  * The freelist head. The first two fields match the first two in the
  * xfs_dquot_t structure (in xfs_dqmarker_t)
  */
 typedef struct xfs_frlist {
        struct xfs_dquot *qh_next;
        struct xfs_dquot *qh_prev;
        mutex_t		 qh_lock;
        uint		 qh_version;
        uint		 qh_nelems;
 } xfs_frlist_t;

 /*
  * Quota Manager (global) structure. Lives only in core.
  */
 typedef struct xfs_qm {
 	xfs_dqlist_t	*qm_usr_dqhtable;/* udquot hash table */
 	xfs_dqlist_t	*qm_grp_dqhtable;/* gdquot hash table */
 	uint		 qm_dqhashmask;	 /* # buckets in dq hashtab - 1 */
 	xfs_frlist_t	 qm_dqfreelist;	 /* freelist of dquots */
 	atomic_t	 qm_totaldquots; /* total incore dquots */
 	uint		 qm_nrefs;	 /* file systems with quota on */
 	int		 qm_dqfree_ratio;/* ratio of free to inuse dquots */
 	kmem_zone_t	*qm_dqzone;	 /* dquot mem-alloc zone */
 	kmem_zone_t	*qm_dqtrxzone;	 /* t_dqinfo of transactions */
 } xfs_qm_t;

 /*
  * Various quota information for individual filesystems.
  * The mount structure keeps a pointer to this.
  */
 typedef struct xfs_quotainfo {
 	xfs_inode_t	*qi_uquotaip;	 /* user quota inode */
 	xfs_inode_t	*qi_gquotaip;	 /* group quota inode */
 	lock_t		 qi_pinlock;	 /* dquot pinning mutex */
 	xfs_dqlist_t	 qi_dqlist;	 /* all dquots in filesys */
 	int		 qi_dqreclaims;	 /* a change here indicates
 					    a removal in the dqlist */
 	time_t		 qi_btimelimit;	 /* limit for blks timer */
 	time_t		 qi_itimelimit;	 /* limit for inodes timer */
 	time_t		 qi_rtbtimelimit;/* limit for rt blks timer */
 	xfs_qwarncnt_t	 qi_bwarnlimit;	 /* limit for blks warnings */
 	xfs_qwarncnt_t	 qi_iwarnlimit;	 /* limit for inodes warnings */
 	xfs_qwarncnt_t	 qi_rtbwarnlimit;/* limit for rt blks warnings */
 	mutex_t		 qi_quotaofflock;/* to serialize quotaoff */
 	xfs_filblks_t	 qi_dqchunklen;	 /* # BBs in a chunk of dqs */
 	uint		 qi_dqperchunk;	 /* # ondisk dqs in above chunk */
 	xfs_qcnt_t	 qi_bhardlimit;	 /* default data blk hard limit */
 	xfs_qcnt_t	 qi_bsoftlimit;	 /* default data blk soft limit */
 	xfs_qcnt_t	 qi_ihardlimit;	 /* default inode count hard limit */
 	xfs_qcnt_t	 qi_isoftlimit;	 /* default inode count soft limit */
 	xfs_qcnt_t	 qi_rtbhardlimit;/* default realtime blk hard limit */
 	xfs_qcnt_t	 qi_rtbsoftlimit;/* default realtime blk soft limit */
 } xfs_quotainfo_t;


 extern xfs_dqtrxops_t	xfs_trans_dquot_ops;

 extern void	xfs_trans_mod_dquot(xfs_trans_t *, xfs_dquot_t *, uint, long);
 extern int	xfs_trans_reserve_quota_bydquots(xfs_trans_t *, xfs_mount_t *,
 			xfs_dquot_t *, xfs_dquot_t *, long, long, uint);
 extern void	xfs_trans_dqjoin(xfs_trans_t *, xfs_dquot_t *);
 extern void	xfs_trans_log_dquot(xfs_trans_t *, xfs_dquot_t *);

 /*
  * We keep the usr and grp dquots separately so that locking will be easier
  * to do at commit time. All transactions that we know of at this point
  * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
  */
 #define XFS_QM_TRANS_MAXDQS		2
 typedef struct xfs_dquot_acct {
 	xfs_dqtrx_t	dqa_usrdquots[XFS_QM_TRANS_MAXDQS];
 	xfs_dqtrx_t	dqa_grpdquots[XFS_QM_TRANS_MAXDQS];
 } xfs_dquot_acct_t;

 /*
  * Users are allowed to have a usage exceeding their softlimit for
  * a period this long.
  */
 #define XFS_QM_BTIMELIMIT	(7 * 24*60*60)          /* 1 week */
 #define XFS_QM_RTBTIMELIMIT	(7 * 24*60*60)          /* 1 week */
 #define XFS_QM_ITIMELIMIT	(7 * 24*60*60)          /* 1 week */

 #define XFS_QM_BWARNLIMIT	5
 #define XFS_QM_IWARNLIMIT	5
 #define XFS_QM_RTBWARNLIMIT	5

 #define XFS_QM_LOCK(xqm)	(mutex_lock(&xqm##_lock, PINOD))
 #define XFS_QM_UNLOCK(xqm)	(mutex_unlock(&xqm##_lock))
 #define XFS_QM_HOLD(xqm)	((xqm)->qm_nrefs++)
 #define XFS_QM_RELE(xqm)	((xqm)->qm_nrefs--)

 extern void		xfs_qm_destroy_quotainfo(xfs_mount_t *);
 extern int		xfs_qm_mount_quotas(xfs_mount_t *, int);
 extern void		xfs_qm_mount_quotainit(xfs_mount_t *, uint);
 extern int		xfs_qm_quotacheck(xfs_mount_t *);
 extern void		xfs_qm_unmount_quotadestroy(xfs_mount_t *);
 extern int		xfs_qm_unmount_quotas(xfs_mount_t *);
 extern int		xfs_qm_write_sb_changes(xfs_mount_t *, __int64_t);
 extern int		xfs_qm_sync(xfs_mount_t *, short);

 /* dquot stuff */
 extern boolean_t	xfs_qm_dqalloc_incore(xfs_dquot_t **);
 extern int		xfs_qm_dqattach(xfs_inode_t *, uint);
 extern void		xfs_qm_dqdetach(xfs_inode_t *);
 extern int		xfs_qm_dqpurge_all(xfs_mount_t *, uint);
 extern void		xfs_qm_dqrele_all_inodes(xfs_mount_t *, uint);

 /* vop stuff */
 extern int		xfs_qm_vop_dqalloc(xfs_mount_t *, xfs_inode_t *,
 					uid_t, gid_t, prid_t, uint,
 					xfs_dquot_t **, xfs_dquot_t **);
 extern void		xfs_qm_vop_dqattach_and_dqmod_newinode(
 					xfs_trans_t *, xfs_inode_t *,
 					xfs_dquot_t *, xfs_dquot_t *);
 extern int		xfs_qm_vop_rename_dqattach(xfs_inode_t **);
 extern xfs_dquot_t *	xfs_qm_vop_chown(xfs_trans_t *, xfs_inode_t *,
 					xfs_dquot_t **, xfs_dquot_t *);
 extern int		xfs_qm_vop_chown_reserve(xfs_trans_t *, xfs_inode_t *,
 					xfs_dquot_t *, xfs_dquot_t *, uint);

 /* list stuff */
 extern void		xfs_qm_freelist_append(xfs_frlist_t *, xfs_dquot_t *);
 extern void		xfs_qm_freelist_unlink(xfs_dquot_t *);
 extern int		xfs_qm_freelist_lock_nowait(xfs_qm_t *);

 /* system call interface */
 extern int		xfs_qm_quotactl(bhv_desc_t *, int, int, xfs_caddr_t);

 #ifdef DEBUG
 extern int		xfs_qm_internalqcheck(xfs_mount_t *);
 #else
 #define xfs_qm_internalqcheck(mp)	(0)
 #endif

 #endif /* __XFS_QM_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 version 2 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.
	*
	* Further, this software is distributed without any warranty that it is
	* free of the rightful claim of any third person regarding infringement
	* or the like. Any license provided herein, whether implied or
	* otherwise, applies only to this software file. Patent licenses, if
	* any, provided herein do not apply to combinations of this program with
	* other software, or any other product whatsoever.
	*
	* You should have received a copy of the GNU General Public License along
	* with this program; if not, write the Free Software Foundation, Inc., 59
	* Temple Place - Suite 330, Boston MA 02111-1307, USA.
	*
	* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
	* Mountain View, CA 94043, or:
	*
	* http://www.sgi.com
	*
	* For further information regarding this notice, see:
	*
	* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
	*/
	#ifndef __XFS_QM_H__
	#define __XFS_QM_H__

	#include "xfs_dquot_item.h"
	#include "xfs_dquot.h"
	#include "xfs_quota_priv.h"
	#include "xfs_qm_stats.h"

	struct xfs_qm;
	struct xfs_inode;

	extern mutex_t xfs_Gqm_lock;
	extern struct xfs_qm *xfs_Gqm;
	extern kmem_zone_t *qm_dqzone;
	extern kmem_zone_t *qm_dqtrxzone;

	/*
	* Used in xfs_qm_sync called by xfs_sync to count the max times that it can
	* iterate over the mountpt's dquot list in one call.
	*/
	#define XFS_QM_SYNC_MAX_RESTARTS 7

	/*
	* Ditto, for xfs_qm_dqreclaim_one.
	*/
	#define XFS_QM_RECLAIM_MAX_RESTARTS 4

	/*
	* Ideal ratio of free to in use dquots. Quota manager makes an attempt
	* to keep this balance.
	*/
	#define XFS_QM_DQFREE_RATIO 2

	/*
	* Dquot hashtable constants/threshold values.
	*/
	#define XFS_QM_NCSIZE_THRESHOLD 5000
	#define XFS_QM_HASHSIZE_LOW 32
	#define XFS_QM_HASHSIZE_HIGH 64

	/*
	* We output a cmn_err when quotachecking a quota file with more than
	* this many fsbs.
	*/
	#define XFS_QM_BIG_QCHECK_NBLKS 500

	/*
	* This defines the unit of allocation of dquots.
	* Currently, it is just one file system block, and a 4K blk contains 30
	* (136 * 30 = 4080) dquots. It's probably not worth trying to make
	* this more dynamic.
	* XXXsup However, if this number is changed, we have to make sure that we don't
	* implicitly assume that we do allocations in chunks of a single filesystem
	* block in the dquot/xqm code.
	*/
	#define XFS_DQUOT_CLUSTER_SIZE_FSB (xfs_filblks_t)1
	/*
	* When doing a quotacheck, we log dquot clusters of this many FSBs at most
	* in a single transaction. We don't want to ask for too huge a log reservation.
	*/
	#define XFS_QM_MAX_DQCLUSTER_LOGSZ 3

	typedef xfs_dqhash_t xfs_dqlist_t;
	/*
	* The freelist head. The first two fields match the first two in the
	* xfs_dquot_t structure (in xfs_dqmarker_t)
	*/
	typedef struct xfs_frlist {
	struct xfs_dquot *qh_next;
	struct xfs_dquot *qh_prev;
	mutex_t qh_lock;
	uint qh_version;
	uint qh_nelems;
	} xfs_frlist_t;

	/*
	* Quota Manager (global) structure. Lives only in core.
	*/
	typedef struct xfs_qm {
	xfs_dqlist_t qm_usr_dqhtable;/ udquot hash table */
	xfs_dqlist_t qm_grp_dqhtable;/ gdquot hash table */
	uint qm_dqhashmask; /* # buckets in dq hashtab - 1 */
	xfs_frlist_t qm_dqfreelist; /* freelist of dquots */
	atomic_t qm_totaldquots; /* total incore dquots */
	uint qm_nrefs; /* file systems with quota on */
	int qm_dqfree_ratio;/* ratio of free to inuse dquots */
	kmem_zone_t qm_dqzone; / dquot mem-alloc zone */
	kmem_zone_t qm_dqtrxzone; / t_dqinfo of transactions */
	} xfs_qm_t;

	/*
	* Various quota information for individual filesystems.
	* The mount structure keeps a pointer to this.
	*/
	typedef struct xfs_quotainfo {
	xfs_inode_t qi_uquotaip; / user quota inode */
	xfs_inode_t qi_gquotaip; / group quota inode */
	lock_t qi_pinlock; /* dquot pinning mutex */
	xfs_dqlist_t qi_dqlist; /* all dquots in filesys */
	int qi_dqreclaims; /* a change here indicates
	a removal in the dqlist */
	time_t qi_btimelimit; /* limit for blks timer */
	time_t qi_itimelimit; /* limit for inodes timer */
	time_t qi_rtbtimelimit;/* limit for rt blks timer */
	xfs_qwarncnt_t qi_bwarnlimit; /* limit for blks warnings */
	xfs_qwarncnt_t qi_iwarnlimit; /* limit for inodes warnings */
	xfs_qwarncnt_t qi_rtbwarnlimit;/* limit for rt blks warnings */
	mutex_t qi_quotaofflock;/* to serialize quotaoff */
	xfs_filblks_t qi_dqchunklen; /* # BBs in a chunk of dqs */
	uint qi_dqperchunk; /* # ondisk dqs in above chunk */
	xfs_qcnt_t qi_bhardlimit; /* default data blk hard limit */
	xfs_qcnt_t qi_bsoftlimit; /* default data blk soft limit */
	xfs_qcnt_t qi_ihardlimit; /* default inode count hard limit */
	xfs_qcnt_t qi_isoftlimit; /* default inode count soft limit */
	xfs_qcnt_t qi_rtbhardlimit;/* default realtime blk hard limit */
	xfs_qcnt_t qi_rtbsoftlimit;/* default realtime blk soft limit */
	} xfs_quotainfo_t;


	extern xfs_dqtrxops_t xfs_trans_dquot_ops;

	extern void xfs_trans_mod_dquot(xfs_trans_t , xfs_dquot_t , uint, long);
	extern int xfs_trans_reserve_quota_bydquots(xfs_trans_t , xfs_mount_t ,
	xfs_dquot_t , xfs_dquot_t , long, long, uint);
	extern void xfs_trans_dqjoin(xfs_trans_t , xfs_dquot_t );
	extern void xfs_trans_log_dquot(xfs_trans_t , xfs_dquot_t );

	/*
	* We keep the usr and grp dquots separately so that locking will be easier
	* to do at commit time. All transactions that we know of at this point
	* affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
	*/
	#define XFS_QM_TRANS_MAXDQS 2
	typedef struct xfs_dquot_acct {
	xfs_dqtrx_t dqa_usrdquots[XFS_QM_TRANS_MAXDQS];
	xfs_dqtrx_t dqa_grpdquots[XFS_QM_TRANS_MAXDQS];
	} xfs_dquot_acct_t;

	/*
	* Users are allowed to have a usage exceeding their softlimit for
	* a period this long.
	*/
	#define XFS_QM_BTIMELIMIT (7 * 246060) /* 1 week */
	#define XFS_QM_RTBTIMELIMIT (7 * 246060) /* 1 week */
	#define XFS_QM_ITIMELIMIT (7 * 246060) /* 1 week */

	#define XFS_QM_BWARNLIMIT 5
	#define XFS_QM_IWARNLIMIT 5
	#define XFS_QM_RTBWARNLIMIT 5

	#define XFS_QM_LOCK(xqm) (mutex_lock(&xqm##_lock, PINOD))
	#define XFS_QM_UNLOCK(xqm) (mutex_unlock(&xqm##_lock))
	#define XFS_QM_HOLD(xqm) ((xqm)->qm_nrefs++)
	#define XFS_QM_RELE(xqm) ((xqm)->qm_nrefs--)

	extern void xfs_qm_destroy_quotainfo(xfs_mount_t *);
	extern int xfs_qm_mount_quotas(xfs_mount_t *, int);
	extern void xfs_qm_mount_quotainit(xfs_mount_t *, uint);
	extern int xfs_qm_quotacheck(xfs_mount_t *);
	extern void xfs_qm_unmount_quotadestroy(xfs_mount_t *);
	extern int xfs_qm_unmount_quotas(xfs_mount_t *);
	extern int xfs_qm_write_sb_changes(xfs_mount_t *, __int64_t);
	extern int xfs_qm_sync(xfs_mount_t *, short);

	/* dquot stuff */
	extern boolean_t xfs_qm_dqalloc_incore(xfs_dquot_t **);
	extern int xfs_qm_dqattach(xfs_inode_t *, uint);
	extern void xfs_qm_dqdetach(xfs_inode_t *);
	extern int xfs_qm_dqpurge_all(xfs_mount_t *, uint);
	extern void xfs_qm_dqrele_all_inodes(xfs_mount_t *, uint);

	/* vop stuff */
	extern int xfs_qm_vop_dqalloc(xfs_mount_t , xfs_inode_t ,
	uid_t, gid_t, prid_t, uint,
	xfs_dquot_t , xfs_dquot_t );
	extern void xfs_qm_vop_dqattach_and_dqmod_newinode(
	xfs_trans_t , xfs_inode_t ,
	xfs_dquot_t , xfs_dquot_t );
	extern int xfs_qm_vop_rename_dqattach(xfs_inode_t **);
	extern xfs_dquot_t * xfs_qm_vop_chown(xfs_trans_t , xfs_inode_t ,
	xfs_dquot_t *, xfs_dquot_t );
	extern int xfs_qm_vop_chown_reserve(xfs_trans_t , xfs_inode_t ,
	xfs_dquot_t , xfs_dquot_t , uint);

	/* list stuff */
	extern void xfs_qm_freelist_append(xfs_frlist_t , xfs_dquot_t );
	extern void xfs_qm_freelist_unlink(xfs_dquot_t *);
	extern int xfs_qm_freelist_lock_nowait(xfs_qm_t *);

	/* system call interface */
	extern int xfs_qm_quotactl(bhv_desc_t *, int, int, xfs_caddr_t);

	#ifdef DEBUG
	extern int xfs_qm_internalqcheck(xfs_mount_t *);
	#else
	#define xfs_qm_internalqcheck(mp) (0)
	#endif

	#endif /* __XFS_QM_H__ */