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phoenix |
/*
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* Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Further, this software is distributed without any warranty that it is
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* free of the rightful claim of any third person regarding infringement
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* or the like. Any license provided herein, whether implied or
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* otherwise, applies only to this software file. Patent licenses, if
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* any, provided herein do not apply to combinations of this program with
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* other software, or any other product whatsoever.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
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* Mountain View, CA 94043, or:
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*
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* http://www.sgi.com
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*
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* For further information regarding this notice, see:
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*
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* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
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*/
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#ifndef __XFS_QM_H__
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#define __XFS_QM_H__
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#include "xfs_dquot_item.h"
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#include "xfs_dquot.h"
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#include "xfs_quota_priv.h"
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#include "xfs_qm_stats.h"
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struct xfs_qm;
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struct xfs_inode;
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extern mutex_t xfs_Gqm_lock;
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extern struct xfs_qm *xfs_Gqm;
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extern kmem_zone_t *qm_dqzone;
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extern kmem_zone_t *qm_dqtrxzone;
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/*
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* Used in xfs_qm_sync called by xfs_sync to count the max times that it can
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* iterate over the mountpt's dquot list in one call.
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*/
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#define XFS_QM_SYNC_MAX_RESTARTS 7
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/*
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* Ditto, for xfs_qm_dqreclaim_one.
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*/
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#define XFS_QM_RECLAIM_MAX_RESTARTS 4
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/*
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* Ideal ratio of free to in use dquots. Quota manager makes an attempt
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* to keep this balance.
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*/
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#define XFS_QM_DQFREE_RATIO 2
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/*
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* Dquot hashtable constants/threshold values.
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*/
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#define XFS_QM_NCSIZE_THRESHOLD 5000
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#define XFS_QM_HASHSIZE_LOW 32
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#define XFS_QM_HASHSIZE_HIGH 64
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/*
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* We output a cmn_err when quotachecking a quota file with more than
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* this many fsbs.
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*/
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#define XFS_QM_BIG_QCHECK_NBLKS 500
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/*
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* This defines the unit of allocation of dquots.
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* Currently, it is just one file system block, and a 4K blk contains 30
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* (136 * 30 = 4080) dquots. It's probably not worth trying to make
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* this more dynamic.
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* XXXsup However, if this number is changed, we have to make sure that we don't
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* implicitly assume that we do allocations in chunks of a single filesystem
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* block in the dquot/xqm code.
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*/
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#define XFS_DQUOT_CLUSTER_SIZE_FSB (xfs_filblks_t)1
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/*
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* When doing a quotacheck, we log dquot clusters of this many FSBs at most
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* in a single transaction. We don't want to ask for too huge a log reservation.
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*/
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#define XFS_QM_MAX_DQCLUSTER_LOGSZ 3
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typedef xfs_dqhash_t xfs_dqlist_t;
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/*
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* The freelist head. The first two fields match the first two in the
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* xfs_dquot_t structure (in xfs_dqmarker_t)
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*/
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typedef struct xfs_frlist {
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struct xfs_dquot *qh_next;
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struct xfs_dquot *qh_prev;
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mutex_t qh_lock;
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uint qh_version;
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uint qh_nelems;
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} xfs_frlist_t;
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/*
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* Quota Manager (global) structure. Lives only in core.
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*/
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typedef struct xfs_qm {
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xfs_dqlist_t *qm_usr_dqhtable;/* udquot hash table */
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xfs_dqlist_t *qm_grp_dqhtable;/* gdquot hash table */
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uint qm_dqhashmask; /* # buckets in dq hashtab - 1 */
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xfs_frlist_t qm_dqfreelist; /* freelist of dquots */
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atomic_t qm_totaldquots; /* total incore dquots */
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uint qm_nrefs; /* file systems with quota on */
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int qm_dqfree_ratio;/* ratio of free to inuse dquots */
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kmem_zone_t *qm_dqzone; /* dquot mem-alloc zone */
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kmem_zone_t *qm_dqtrxzone; /* t_dqinfo of transactions */
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} xfs_qm_t;
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/*
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* Various quota information for individual filesystems.
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* The mount structure keeps a pointer to this.
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*/
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typedef struct xfs_quotainfo {
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xfs_inode_t *qi_uquotaip; /* user quota inode */
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xfs_inode_t *qi_gquotaip; /* group quota inode */
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lock_t qi_pinlock; /* dquot pinning mutex */
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xfs_dqlist_t qi_dqlist; /* all dquots in filesys */
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int qi_dqreclaims; /* a change here indicates
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a removal in the dqlist */
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time_t qi_btimelimit; /* limit for blks timer */
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time_t qi_itimelimit; /* limit for inodes timer */
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time_t qi_rtbtimelimit;/* limit for rt blks timer */
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xfs_qwarncnt_t qi_bwarnlimit; /* limit for num warnings */
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xfs_qwarncnt_t qi_iwarnlimit; /* limit for num warnings */
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mutex_t qi_quotaofflock;/* to serialize quotaoff */
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/* Some useful precalculated constants */
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xfs_filblks_t qi_dqchunklen; /* # BBs in a chunk of dqs */
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uint qi_dqperchunk; /* # ondisk dqs in above chunk */
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} xfs_quotainfo_t;
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extern xfs_dqtrxops_t xfs_trans_dquot_ops;
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extern void xfs_trans_mod_dquot(xfs_trans_t *, xfs_dquot_t *, uint, long);
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extern int xfs_trans_reserve_quota_bydquots(xfs_trans_t *, xfs_mount_t *,
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xfs_dquot_t *, xfs_dquot_t *, long, long, uint);
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extern void xfs_trans_dqjoin(xfs_trans_t *, xfs_dquot_t *);
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extern void xfs_trans_log_dquot(xfs_trans_t *, xfs_dquot_t *);
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/*
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* We keep the usr and grp dquots separately so that locking will be easier
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* to do at commit time. All transactions that we know of at this point
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* affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value.
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*/
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#define XFS_QM_TRANS_MAXDQS 2
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typedef struct xfs_dquot_acct {
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xfs_dqtrx_t dqa_usrdquots[XFS_QM_TRANS_MAXDQS];
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xfs_dqtrx_t dqa_grpdquots[XFS_QM_TRANS_MAXDQS];
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} xfs_dquot_acct_t;
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/*
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* Users are allowed to have a usage exceeding their softlimit for
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* a period this long.
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*/
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#define XFS_QM_BTIMELIMIT (7 * 24*60*60) /* 1 week */
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#define XFS_QM_RTBTIMELIMIT (7 * 24*60*60) /* 1 week */
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#define XFS_QM_ITIMELIMIT (7 * 24*60*60) /* 1 week */
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#define XFS_QM_BWARNLIMIT 5
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#define XFS_QM_IWARNLIMIT 5
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#define XFS_QM_LOCK(xqm) (mutex_lock(&xqm##_lock, PINOD))
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#define XFS_QM_UNLOCK(xqm) (mutex_unlock(&xqm##_lock))
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#define XFS_QM_HOLD(xqm) ((xqm)->qm_nrefs++)
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#define XFS_QM_RELE(xqm) ((xqm)->qm_nrefs--)
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extern int xfs_qm_init_quotainfo(xfs_mount_t *);
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extern void xfs_qm_destroy_quotainfo(xfs_mount_t *);
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extern int xfs_qm_mount_quotas(xfs_mount_t *);
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extern void xfs_qm_mount_quotainit(xfs_mount_t *, uint);
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extern void xfs_qm_unmount_quotadestroy(xfs_mount_t *);
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extern int xfs_qm_unmount_quotas(xfs_mount_t *);
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extern int xfs_qm_write_sb_changes(xfs_mount_t *, __int64_t);
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extern int xfs_qm_sync(xfs_mount_t *, short);
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/* dquot stuff */
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extern void xfs_qm_dqunlink(xfs_dquot_t *);
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extern boolean_t xfs_qm_dqalloc_incore(xfs_dquot_t **);
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extern int xfs_qm_dqattach(xfs_inode_t *, uint);
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extern void xfs_qm_dqdetach(xfs_inode_t *);
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extern int xfs_qm_dqpurge_all(xfs_mount_t *, uint);
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extern void xfs_qm_dqrele_all_inodes(xfs_mount_t *, uint);
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/* vop stuff */
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extern int xfs_qm_vop_dqalloc(xfs_mount_t *, xfs_inode_t *,
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uid_t, gid_t, uint,
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xfs_dquot_t **, xfs_dquot_t **);
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extern void xfs_qm_vop_dqattach_and_dqmod_newinode(
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xfs_trans_t *, xfs_inode_t *,
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xfs_dquot_t *, xfs_dquot_t *);
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extern int xfs_qm_vop_rename_dqattach(xfs_inode_t **);
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extern xfs_dquot_t * xfs_qm_vop_chown(xfs_trans_t *, xfs_inode_t *,
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xfs_dquot_t **, xfs_dquot_t *);
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extern int xfs_qm_vop_chown_reserve(xfs_trans_t *, xfs_inode_t *,
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xfs_dquot_t *, xfs_dquot_t *, uint);
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/* list stuff */
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extern void xfs_qm_freelist_init(xfs_frlist_t *);
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extern void xfs_qm_freelist_destroy(xfs_frlist_t *);
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extern void xfs_qm_freelist_insert(xfs_frlist_t *, xfs_dquot_t *);
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extern void xfs_qm_freelist_append(xfs_frlist_t *, xfs_dquot_t *);
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extern void xfs_qm_freelist_unlink(xfs_dquot_t *);
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extern int xfs_qm_freelist_lock_nowait(xfs_qm_t *);
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extern int xfs_qm_mplist_nowait(xfs_mount_t *);
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extern int xfs_qm_dqhashlock_nowait(xfs_dquot_t *);
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/* system call interface */
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extern int xfs_qm_quotactl(bhv_desc_t *, int, int, xfs_caddr_t);
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#ifdef DEBUG
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extern int xfs_qm_internalqcheck(xfs_mount_t *);
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#else
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#define xfs_qm_internalqcheck(mp) (0)
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#endif
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#endif /* __XFS_QM_H__ */
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