/* * Copyright (c) 2000-2003 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	3typedef 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 num warnings */	xfs_qwarncnt_t	 qi_iwarnlimit;	 /* limit for num warnings */	mutex_t		 qi_quotaofflock;/* to serialize quotaoff */	/* Some useful precalculated constants */	xfs_filblks_t	 qi_dqchunklen;	 /* # BBs in a chunk of dqs */	uint		 qi_dqperchunk;	 /* # ondisk dqs in above chunk */} 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		2typedef 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_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 int		xfs_qm_init_quotainfo(xfs_mount_t *);extern void		xfs_qm_destroy_quotainfo(xfs_mount_t *);extern int		xfs_qm_mount_quotas(xfs_mount_t *);extern void		xfs_qm_mount_quotainit(xfs_mount_t *, uint);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 void		xfs_qm_dqunlink(xfs_dquot_t *);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, 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_init(xfs_frlist_t *);extern void		xfs_qm_freelist_destroy(xfs_frlist_t *);extern void		xfs_qm_freelist_insert(xfs_frlist_t *, xfs_dquot_t *);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 *);extern int		xfs_qm_mplist_nowait(xfs_mount_t *);extern int		xfs_qm_dqhashlock_nowait(xfs_dquot_t *);/* system call interface */extern int		xfs_qm_quotactl(bhv_desc_t *, int, int, xfs_caddr_t);#ifdef DEBUGextern int		xfs_qm_internalqcheck(xfs_mount_t *);#else#define xfs_qm_internalqcheck(mp)	(0)#endif#endif /* __XFS_QM_H__ */