1/* 2 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 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. 13 * 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 17 */ 18#ifndef __XFS_QM_H__ 19#define __XFS_QM_H__ 20 21#include "xfs_dquot_item.h" 22#include "xfs_dquot.h" 23#include "xfs_quota_priv.h" 24#include "xfs_qm_stats.h" 25 26struct xfs_qm; 27struct xfs_inode; 28 29extern uint ndquot; 30extern struct mutex xfs_Gqm_lock; 31extern struct xfs_qm *xfs_Gqm; 32extern kmem_zone_t *qm_dqzone; 33extern kmem_zone_t *qm_dqtrxzone; 34 35/* 36 * Used in xfs_qm_sync called by xfs_sync to count the max times that it can 37 * iterate over the mountpt's dquot list in one call. 38 */ 39#define XFS_QM_SYNC_MAX_RESTARTS 7 40 41/* 42 * Ditto, for xfs_qm_dqreclaim_one. 43 */ 44#define XFS_QM_RECLAIM_MAX_RESTARTS 4 45 46/* 47 * Ideal ratio of free to in use dquots. Quota manager makes an attempt 48 * to keep this balance. 49 */ 50#define XFS_QM_DQFREE_RATIO 2 51 52/* 53 * Dquot hashtable constants/threshold values. 54 */ 55#define XFS_QM_HASHSIZE_LOW (PAGE_SIZE / sizeof(xfs_dqhash_t)) 56#define XFS_QM_HASHSIZE_HIGH ((PAGE_SIZE * 4) / sizeof(xfs_dqhash_t)) 57 58/* 59 * This defines the unit of allocation of dquots. 60 * Currently, it is just one file system block, and a 4K blk contains 30 61 * (136 * 30 = 4080) dquots. It's probably not worth trying to make 62 * this more dynamic. 63 * XXXsup However, if this number is changed, we have to make sure that we don't 64 * implicitly assume that we do allocations in chunks of a single filesystem 65 * block in the dquot/xqm code. 66 */ 67#define XFS_DQUOT_CLUSTER_SIZE_FSB (xfs_filblks_t)1 68/* 69 * When doing a quotacheck, we log dquot clusters of this many FSBs at most 70 * in a single transaction. We don't want to ask for too huge a log reservation. 71 */ 72#define XFS_QM_MAX_DQCLUSTER_LOGSZ 3 73 74typedef xfs_dqhash_t xfs_dqlist_t; 75 76/* 77 * Quota Manager (global) structure. Lives only in core. 78 */ 79typedef struct xfs_qm { 80 xfs_dqlist_t *qm_usr_dqhtable;/* udquot hash table */ 81 xfs_dqlist_t *qm_grp_dqhtable;/* gdquot hash table */ 82 uint qm_dqhashmask; /* # buckets in dq hashtab - 1 */ 83 struct list_head qm_dqfrlist; /* freelist of dquots */ 84 struct mutex qm_dqfrlist_lock; 85 int qm_dqfrlist_cnt; 86 atomic_t qm_totaldquots; /* total incore dquots */ 87 uint qm_nrefs; /* file systems with quota on */ 88 int qm_dqfree_ratio;/* ratio of free to inuse dquots */ 89 kmem_zone_t *qm_dqzone; /* dquot mem-alloc zone */ 90 kmem_zone_t *qm_dqtrxzone; /* t_dqinfo of transactions */ 91} xfs_qm_t; 92 93/* 94 * Various quota information for individual filesystems. 95 * The mount structure keeps a pointer to this. 96 */ 97typedef struct xfs_quotainfo { 98 xfs_inode_t *qi_uquotaip; /* user quota inode */ 99 xfs_inode_t *qi_gquotaip; /* group quota inode */ 100 struct list_head qi_dqlist; /* all dquots in filesys */ 101 struct mutex qi_dqlist_lock; 102 int qi_dquots; 103 int qi_dqreclaims; /* a change here indicates 104 a removal in the dqlist */ 105 time_t qi_btimelimit; /* limit for blks timer */ 106 time_t qi_itimelimit; /* limit for inodes timer */ 107 time_t qi_rtbtimelimit;/* limit for rt blks timer */ 108 xfs_qwarncnt_t qi_bwarnlimit; /* limit for blks warnings */ 109 xfs_qwarncnt_t qi_iwarnlimit; /* limit for inodes warnings */ 110 xfs_qwarncnt_t qi_rtbwarnlimit;/* limit for rt blks warnings */ 111 struct mutex qi_quotaofflock;/* to serialize quotaoff */ 112 xfs_filblks_t qi_dqchunklen; /* # BBs in a chunk of dqs */ 113 uint qi_dqperchunk; /* # ondisk dqs in above chunk */ 114 xfs_qcnt_t qi_bhardlimit; /* default data blk hard limit */ 115 xfs_qcnt_t qi_bsoftlimit; /* default data blk soft limit */ 116 xfs_qcnt_t qi_ihardlimit; /* default inode count hard limit */ 117 xfs_qcnt_t qi_isoftlimit; /* default inode count soft limit */ 118 xfs_qcnt_t qi_rtbhardlimit;/* default realtime blk hard limit */ 119 xfs_qcnt_t qi_rtbsoftlimit;/* default realtime blk soft limit */ 120} xfs_quotainfo_t; 121 122 123extern void xfs_trans_mod_dquot(xfs_trans_t *, xfs_dquot_t *, uint, long); 124extern int xfs_trans_reserve_quota_bydquots(xfs_trans_t *, xfs_mount_t *, 125 xfs_dquot_t *, xfs_dquot_t *, long, long, uint); 126extern void xfs_trans_dqjoin(xfs_trans_t *, xfs_dquot_t *); 127extern void xfs_trans_log_dquot(xfs_trans_t *, xfs_dquot_t *); 128 129/* 130 * We keep the usr and grp dquots separately so that locking will be easier 131 * to do at commit time. All transactions that we know of at this point 132 * affect no more than two dquots of one type. Hence, the TRANS_MAXDQS value. 133 */ 134#define XFS_QM_TRANS_MAXDQS 2 135typedef struct xfs_dquot_acct { 136 xfs_dqtrx_t dqa_usrdquots[XFS_QM_TRANS_MAXDQS]; 137 xfs_dqtrx_t dqa_grpdquots[XFS_QM_TRANS_MAXDQS]; 138} xfs_dquot_acct_t; 139 140/* 141 * Users are allowed to have a usage exceeding their softlimit for 142 * a period this long. 143 */ 144#define XFS_QM_BTIMELIMIT (7 * 24*60*60) /* 1 week */ 145#define XFS_QM_RTBTIMELIMIT (7 * 24*60*60) /* 1 week */ 146#define XFS_QM_ITIMELIMIT (7 * 24*60*60) /* 1 week */ 147 148#define XFS_QM_BWARNLIMIT 5 149#define XFS_QM_IWARNLIMIT 5 150#define XFS_QM_RTBWARNLIMIT 5 151 152extern void xfs_qm_destroy_quotainfo(xfs_mount_t *); 153extern int xfs_qm_quotacheck(xfs_mount_t *); 154extern int xfs_qm_write_sb_changes(xfs_mount_t *, __int64_t); 155 156/* dquot stuff */ 157extern boolean_t xfs_qm_dqalloc_incore(xfs_dquot_t **); 158extern int xfs_qm_dqpurge_all(xfs_mount_t *, uint); 159extern void xfs_qm_dqrele_all_inodes(xfs_mount_t *, uint); 160 161/* quota ops */ 162extern int xfs_qm_scall_trunc_qfiles(xfs_mount_t *, uint); 163extern int xfs_qm_scall_getquota(xfs_mount_t *, xfs_dqid_t, uint, 164 fs_disk_quota_t *); 165extern int xfs_qm_scall_setqlim(xfs_mount_t *, xfs_dqid_t, uint, 166 fs_disk_quota_t *); 167extern int xfs_qm_scall_getqstat(xfs_mount_t *, fs_quota_stat_t *); 168extern int xfs_qm_scall_quotaon(xfs_mount_t *, uint); 169extern int xfs_qm_scall_quotaoff(xfs_mount_t *, uint); 170 171#ifdef DEBUG 172extern int xfs_qm_internalqcheck(xfs_mount_t *); 173#else 174#define xfs_qm_internalqcheck(mp) (0) 175#endif 176 177#endif /* __XFS_QM_H__ */ 178